Hydraulic pressuring device and method of fitting pressuring

FIELD: process engineering.

SUBSTANCE: invention relates to pressuring by hydraulic device and may be used, in particular, for jointing fitting with tube by pressuring. Proposed device comprises piston and cylinder to act on pressuring jaws. Piston rod is jointed with acting appliances. Adjustable stop is arranged in direction of hydraulic piston travel to set piston extreme position in back stroke. Said stop is arranged outside said cylinder. By varying stop position, pressuring force is carried applied in pressuring. To set pressuring force, pressuring device is set so that pressuring is performed in continuous travel of piston.

EFFECT: expanded performances.

9 cl, 19 dwg

 

The invention relates primarily to a hydraulic pressing device containing a piston and cylinder for the impact on pressing the sponge, while the piston rod in any case connected with influencing means.

Pressing device of this type known from the prior art. Reference is made, for example, in DE 19803536 A1. This publication describes and shows a pressing device, which through pincer sponge affects pressing chain with multiple chain links. The pressing piston device for influencing pressing the sponge is moved hydraulically in the position of the crimp. Reverse is accomplished using a compressible during a forward stroke of the spring.

From DE 10010601 A1 it is known pressing device of the specified type, which is hydraulically impact on formed of pressing jaws, bearing replacement press insert press Zev.

Impact on pressing the sponge is usually done through located on the side of the instrument effecting means, which in any case is connected with the piston rod of a hydraulic piston.

Taking into account the above prior art, this invention is a technical task of further improvement of the pressing device in asanoha so, to use the same device can be performed requiring different pressing energy crimp.

This problem is solved primarily and essentially using the subject of paragraph 1 of the claims due to the fact that the direction of movement of the hydraulic piston is provided the adjustable to provide different end positions of the hydraulic piston in piston reversal. As a result of such execution created pressing device of the specified type, which can perform various strokes of the piston. Using an adjustable stop is provided by limiting the return stroke of the piston, in particular after the crimping, so that the following process pressurization comes from this limited focus position of the piston. As a result, the installation stops, you can perform test different pressing energies, and only for one time, i.e. only one actuation device. In addition, it is preferable when there is continuous movement of the piston. In line with this for the stroke of the piston preferably is not provided idling. If you need low pressing energy, the adjustable means in the position from which the piston is relatively small path in the axial direction to the op is associ. When the required high pressing energies emphasis, respectively, translated to a position from which the piston passes through a longer path for the final crimp. In accordance with this by using the same pressing device provides test different pressing energies, and in General provides a wide range of power crimp at the expense of interacting, as in conventional pressing devices, means acting plots pressing jaws. However, despite various pressing energy, you can achieve the same end efforts in the maximum position of the crimp. Increased pressing energy is required, for example, by crimping fittings with large nominal widths. In addition, using the proposed solution can be used in pressing device standard pressing sponge. To do this, in the pressing device is also provided a standard for the press jaws. In particular, preferably one in which the forklift shoulders cervical device facing each other surfaces, which basically consist of parallel planes, have a median longitudinal groove, passing in the direction of movement of the piston. Longitudinal groove preferably has a parallel n the surface (the base of the grooves). Base width of the groove preferably is 36.2-36,4 mm Distance between the bases of the grooves, i.e. in the direction perpendicular to forming the base of the grooves planes is preferably 33,1 or 33.3 mm also provided for fixing the pressing jaws with passing through the neck of the device across the direction of movement of a piston finger. To do this, press the sponges have a flat earrings with holes. The diameter of the holes in the flat earrings and, respectively, at the neck of the device is 14-14,1 mm when the diameter of the finger 13,5-13,95 mm

It is clear that these dimensions may be altered while ensuring compatibility with the appropriate normalized sponges.

It is significant that as the pressing jaws for crimping with great energy or standard pressing the sponge can be inserted and fixed in the same nest for the press jaws, namely the above standard socket for pressing jaws.

Items other claims are explained below regarding the subject matter of paragraph 1 of the claims, however, may also have value in independent formulation.

Regulation of emphasis can be performed mechanically, for example with a hydraulic or electric support. Preferred option is to run in to the m focus can be adjusted manually preferably with the release of the stopper or the like before the offset, in particular shift. In another preferred embodiment, the adjustable stop has two, in particular fixed with the stopper resistant provisions. In addition, there is a possibility of supply stop several provisions, i.e. the two end positions and other intermediate positions to increase the range of possible moves of the piston and, accordingly, the pressing energies. In addition, it is proposed that the focus is adjusted by means provided in the radial direction from the outside of the cylinder arm. The handle is provided, respectively, in the so-called dry zone of the hydraulic system, i.e. in the radial direction from the outside ambient hydraulic cylinder piston. Thus, the handle is favorable from the point of view of controlling the position at the pressing device, preferably near the pressing jaws. The handle is preferably made in the form of sliding relative to the cylinder liner, more preferably in the form of surrounding the cylinder liner, which can optionally include a user. This gilbourne arm provided with, for example, the locking head for the liberation of providing thrust position of the stopper or the like On the cylinder, ofwhich are installed with the possibility of a shift sleeve, may be provided for marking, more preferably color coded, which refers to the various stop positions.

Especially preferred is an embodiment in which the stop is provided on the outside of the cylinder in the so-called dry area outside of the hydraulic piston. Emphasis interacts preferably with a plot connecting the piston with the acting by means of the piston rod. Interacting with emphasis piston should not be necessarily piston hydraulic combination a cylinder with a piston. Instead, a possible system in which the pressing device has an interchangeable head device with a separate piston rod and return spring. In accordance with this, in this embodiment, the stop together with the handle is part of the interchangeable head device, which as a result of such execution can be adjusted to various desired pressing of energy.

United with the piston rod acting means are rollers that affect addressed to them of a Cam surface of a pressing lever or pressing jaws, to ensure due to stroke unclamping having a Cam surface ends of the pressing jaws, which leads on the other end of the pressing jaws closing vypolnennoj there pressing throat. In a preferred embodiment, the stop interacts with the rollers. Rollers, respectively, are moved during the return stroke of the piston after completion of crimp to stop, and from this position can be carried out following the crimping process.

In addition, provided that the pressing device has at least two pairs of different pressing jaws, which differ in the length of the zone of interaction of the Cam surfaces acting means, with longer interaction zone corresponds to a smaller angle of elevation corresponding means acting surfaces of the zone of interaction. In accordance with this pressing device to provide a pair of pressing jaws, which at the same geometry of the extrusion orifice differ from each other, in particular the length of interacting with acting means or, respectively, with the rollers shoulders pressing jaws in agreement with established by means of an adjustable stop stroke. By agreeing elevation interacting with the Cam rollers of the pressing surfaces of the jaws while preferably remaining constant thrust force of the piston is equal to, for example, 32 kN is achieved by changing pressing energy. Accordingly, for example, for opresso the CI fittings with large nominal width and preferably required with higher pressing power pressing jaws for pressing the device fixed pressing sponge with longer levers pressing jaws, and a stop for the piston is mounted so that achieved increased, preferably the maximum piston stroke. Due to the flatter the angle, in comparison with shorter jaws, cooperating with the rollers of the Cam surfaces is achieved by increasing the pressing energy, preferably at a constant thrust force of the piston, usually there are also different pressing efforts in forging the shed. Despite various pressing power can deliver also remain unchanged final effort in pressing the shed.

Preferably limited by stops minimum piston stroke is, for example, 40 mm Maximum stroke of the piston exceeds 1.5 to 3 times the minimum speed, i.e. is, for example, 80-100 mm, preferably At constant thrust force of the piston about 32 kN can be achieved pressing energies from 1000 to 4000 joules, for example 1280 j during pressure tests with short stroke and 3040 j during pressure tests with long stroke (theoretical values, without considering losses).

In addition, the invention relates to a method of crimping of the fitting with the pipe by pressing the circuit and hydraulic pressing device, with the stroke of the piston/cylinder while pressing the chain has more than two links in a chain and crimp occurs with a certain ODA is slivochnoi energy.

Pressing the circuit is known from DE 10257613 A1. It is driven using a pressing device, for example according to DE 19944229 A1.

To improve the method mentioned type is proposed that a pressure test performed by a pressing device pressing the energy which is generated during crimping, can be changed by changing the hard stop, which rests against the piston to limit the movement of the piston, and install so that the crimping is performed during the continuous passing of piston movement.

Due to the proposed method the same pressing device can be used for crimping fittings with a small pressing energy and crimp fittings with a large pressing energy. Consequently, the pressing device has different strokes of the piston, which, after actuation of the device completely passes the piston (for once). Using adjustable hard stop is provided by limiting the return stroke of the piston, in particular after completed pressing, if necessary, also due to the intervention of the user so that the next process pressurization comes from this limited focus position of the piston. If you need small pressing energy, the adjustable transferred to the state is, from which the piston is relatively small path in the axial direction to crimp. When required large pressing energies emphasis, respectively, transferred to the position from which the piston passes through a longer path for the final crimp. Regardless mounted by adjustable hard stops different pressing energies and thus different strokes traction force of the piston is preferably the same. While in the press shed can occur mainly different pressing forces. Increased pressing energy is needed, for example, by crimping fittings with large nominal widths.

Below is a detailed explanation of the invention with reference to the accompanying drawings, which depict only examples, namely:

1 - pressing device according to the first variant implementation, affecting pressing the chain pressing jaws, in the future;

figure 2 is a section along the line II-II in figure 1 in position long stroke of the tool;

figure 3 replaceable head pressing device in position long stroke;

4 is a section along the line IV-IV of figure 3;

5 is a section along the line V-V of figure 3;

6 is a replaceable head device in the form end;

Fig.7 - replaceable head according to figure 3, but in the tick position in the management of (permutation) of the stop;

Fig - section along the line VIII-VIII of figure 7;

Fig.9 is a section along the line IX-IX of figure 7;

figure 10 - replaceable head according to figure 3, but the position of the short stroke after the shift of emphasis;

11 is a section along the line XI-XI of figure 10;

Fig is a longitudinal section of a pressing device in position long stroke with correspondingly longer pressing jaws for impact on pressing chain;

Fig - pressing device according Fig, however, the position of the short stroke with a shorter pressing jaws;

Fig - longer pressing sponge;

Fig shorter pressing sponge;

Fig - longer and shorter pressing the sponge in comparison;

Fig - pressing device according to the second variant implementation, forming pressing revealing pressing jaws, in perspective projection;

Fig - driven manually, hydraulically acting pressing device according to another variant implementation, with adjustable focus, in the future;

Fig - pressing device according to another variant of the run, in the long term.

Here is the description shown in figure 1 of the first variant of execution is driven by an electric motor, a hydraulic pressing device 1. This is the instrument known from DE 19944229 A1. The full content of this patent application is included in the disclosure of this invention also to include signs of this patent application in the formula of the present invention.

The device 1 is an electric motor. The drive of the motor is carried out through integrated in the handle 2 of the battery. When enabled, activated by finger switch in the handle 2 from the reservoir is pumped oil into the cylinder 4, whereby the piston 4 moves in the direction of its final operating position.

On the hydraulic cylinder 4, the outside is provided with radial seal 6, the piston 5 is shown in the exemplary embodiment the interchangeable head 7 devices. This is shown in the drawing, the cylinder 7 serves to accommodate loading the pressing jaws 8.

Made essentially in the form of the glass of the hydraulic cylinder 4 is open in the direction of the head 7 of the device and serves, on the one hand, for direction on the inner walls of the piston 5 and, on the other hand, for the connection on the outer side of the pressing device 1 with the head 7 of the device for which the hydraulic cylinder 4 is on the outer wall of the outer thread 9.

The piston 5 is made in the form of glass, has a coaxial directional wall 10 of the Cup, that the outside party is based on vnutrennyaya hydraulic cylinder 4.

The wall 10 of the Cup contains sitting on the piston 5 with the radial distance of the piston rod 11, which is on the other end is a bearing element used to interact with pressing jaws acting means 12. They are made in the form of rollers 13.

There are two such roller located on the side of the rod end bearing element 14. The rollers 13 are held by a carrying element 14 rotatably, while their location is chosen so that the rollers 13 are located next to each other on both sides of the longitudinal axis x of the piston rod.

The head 7 of the device using a cylindrical section 15, which is to communicate with an external thread 9 has an internal thread 16 fixedly connected with the pressing device 1. The cylindrical section 15 forms a radially downward thrust wall 17, through which passes the piston rod 11. Resistant wall 17 serves to support one end surrounding the piston rod 11 of the cylindrical spring 18 is compressed, the other end of which is surrounded by a glass wall 10, acts through located at the side of the piston rod centering projection 19 on the piston 5. The centering projection 19 is facing recess of the piston 5.

In the shown versions of the acting tools 12 impact on pressing the sponge 8, which is used to crimp the fitting using the pressing chain. This applies, in particular, pressing the circuit is known from DE 10257613 A1. The full content of this patent application is also included in the disclosure of this invention, also for the purpose of incorporating features of this patent application in the formula of the present invention.

Pressing the circuit 20 has a generally four press link 21, which together participate in the crimp process.

The impact of the pressing jaws 8 for pressing the circuit 20 takes place via located on the side of the chain pivot levers 22. They are equipped with transmitting the force of the elements 23 in the form of fingers. These fingers form a support and controvery for action on pressing circuit 20.

Pressing the sponge attached with the possibility of replacing the head 7 of the device. For this purpose, the head has a neck 24 of the device. It is made in the form of a fork with passing through the shoulder of the fork across the length of the neck socket that holds the locking finger 25.

The locking finger 25 is held on the side of the device through the shoulders of the fork neck 24 of the device and on the side of the tool through appropriately spaced locking holes 26, which are made in the mounting flat earrings 27.

Mounting earrings 27 includes their having a fixing hole 26 gasoline stations in the region of the neck 24 of the device.

Mounting earrings 27 made in the horizon is through the projection of the T-shaped, while located in the middle leg of the T-shaped element has shown above the locking hole 26, and passing across the shoulders of the T are each receiving apertures 28.

Between the two mounting eyelets 27 are attached can be rotated pressing the jaws 8, which are installed in the receiving holes 28 of the fastening earrings 27 trunnion pass through pressing the sponge 8.

The axis of rotation is oriented on both sides perpendicular to the longitudinal axis x of the piston rod.

Regarding the parts of the neck 24 of the device, made for attaching the pressing jaws and the respective transition portions for pressing the jaws, i.e. in particular with respect to the mounting earrings 27, pressing the sponge made in accordance with the standard.

In particular, it provides that the fork arms 24' and 24" neck 24 of the device are parallel to each other opposite the planes E and E', which in turn have a recessed symmetrically (in the same way. as the planes E and E') of the transverse axis y-y (see Fig.6) in the cross section of the longitudinal grooves 46, 46', with the bases of the grooves, which, in turn, are essentially parallel to each other opposite surface. The distance t in the transverse direction between the bases of the grooves in the selected standard execution costal is no 33,1 or 33.3 mm The width b of the grooves 46, 46' preferably is 36.2-36,4 mm

Pressing the sponge is fixed in the socket by passing through the shoulders 24' and 24" fork finger 25, which passes through the fixing hole 26 in the mounting earrings 27 (see also Fig).

When the finger is in the selected standard execution diameter of 13.5-13,95 mm, while these holes have a diameter 14-14,1 mm.

Pressing the sponge 8 is made in the form of levers and on the basis of the above swivel with mounting eyelets 27 are oriented in the form of ticks, while the area of each lever pressing sponge 8 forms a control lever 30, and the speaker in the continuation of this control lever for fastening earrings 27 section forms affecting the area 31. They have consistent sockets for transmitting the force of the pressing members 23 circuit 20, for example taking these finger holes or, respectively, open at the edge of viemam.

The control levers 30 are from the mounting earrings 27 in the direction located on the side of the device acting means 12 and form addressed to them, i.e. facing each other narrow side of the curved control surfaces 32, along which are shaped rollers acting means 12 during the forward movement of the piston.

When is the introduction in action of the pressing device 1, the oil is pumped into the pressure chamber, due to which the piston 5 is moved against the action of the return spring 18 compression in the direction of its working end position, i.e. in the direction of the pressing jaws 8.

While resting in the control surfaces 32 of the pressing jaws 8 of the influencing means 12 or, respectively, the rollers 13 cause due to selected elevation angle of the control surfaces 32 turn down sections of the control levers 30 pressing jaws 8, whereupon located at the ends of the acting parts 31 of the pressing jaws 8 are moved towards each other around the axis of rotation. This leads via a hinged levers 22 to the closing of the pressing circuit 20 and thereby to crimp the fitting using the forging of links 21.

Reverse movement of the piston 5 is carried out by means of a return spring 18 compressed only offer nesobrannyj check valve due to exceeding the specified maximum pressure, see DE 19825160 A1. The full content of this patent application is also included in the disclosure of this invention also to include signs of this patent application in the formula of the present invention.

Opening the exhaust valve closes automatically when exceeding the maximum pressure on the fitting, and then loaded by the compression spring piston first automatically vizitsa ago. The exhaust valve closes automatically as soon as rendered by moving back the piston 5, the pressure on the oil drops at the stop of the piston.

After completed pressing the piston 5 under the action of the spring moves backward due to the opening of the valve and associated pressure drop from the side of the hydraulic neutral position of the piston, which is limited to a focus.

From this neutral position, the piston 5 moves to the next activated on a given segment of road before reaching or exceeding the maximum pressure. While maintaining the same thrust force of the piston, preferably equal to 32 kN, it is possible by changing this part of the path change of the applied pressing energy.

This defines the neutral position of the piston stop is made with the possibility of regulation, resulting in part of the path can be changed in accordance with the desired pressing energy.

Outside the field of hydraulics, i.e. on the dry side of the piston 5, namely, in the shown embodiment in the field of removable head 7 device provides adjustable (adjustable) stop 33. It is made on the inner wall of the sleeve 34, covering the cylindrical section 15 of removable head 7 of the device.

This sleeve 34 is attached with the possibility of a shift in the axial direction of the piece the CA 11 of the piston in the cylindrical section 15, this axial movement of the sleeve 34 is limited by stops in both directions, with limited emphasis end position simultaneously specify both the position of the adjustable stop 33.

Performed simultaneously in the form of arm 35 and the sleeve 34 has a push button 36, which is driven preferably by the thumb. The button on the lower side are biased by spring 37 compression in the radial direction outwards.

Push button 36 is placed located on the inner wall of the sleeve 34 and housing 38 stops, the bottom of which rests a spring 37 compression for a push button 36.

Lying in the housing 38 stops the current plot push button 36 has a radially passing through the flange 39. It affects situated in the plane perpendicular to the longitudinal axis, on both sides of the push button 36 of the locking balls 40, which presses the flange 39 to the outside and come with snap in correspondingly spaced slots 41 located on the side of the head of the unit cylindrical section 15. This locking snap forms specified above defined end stop for the sleeve 34.

In the example shown, you can specify the position of the sleeve 34, namely, on the one hand, the rear in the axial direction position, as shown in figure 2-5, and a front position as shown in figure 10 and 11.

the and Fig.7-9 shows not fixed by latching the intermediate position of the sleeve 34.

It is directed towards influencing means 12 and the end surface 42 of the housing 38 forms a stop adjustable stop 33.

In creating a longer stroke and piston rear fixed position of the sleeve 34, the piston 5 comes in the usual manner in a neutral, limited by the stop position of the piston at a bottom of the receiving piston 5 of the hydraulic cylinder 4. From this position, as shown in Fig.2-6, the piston 5 moves at its maximum path of movement with the formation of the maximum pressing power about 2500-3200 j. In accordance with the rear stop position of the piston 5, which interacts with the piston 5 through the piston rod 11 of the influencing means 12 is also held in the rear position. Accordingly, in this configuration, it is possible to apply the pressing of the jaws 8, which are consistent with modifiable set by adjustable stops 33 the value of the distance between the fixation pressing jaws region located on the side of the device locking finger and exposing means 12 with respect to the length of the control levers 30. Thus, in the configuration with a long stroke is provided by pressing the sponge, according pig, compared to the pressing jaws 8' pig have longer control arms 30 with correspondingly longer control surface is hostame 32.

If you do not require much pressing energy (e.g., 1000-1500 j), the neutral position of the piston is shifted in the direction of forward movement of the piston, whereby the progress of a' piston during the crimping process is reduced. This adjustable stop 33 by means of a sleeve 34 after the preliminary release of fixation by means of a push button 38 is shifted in the direction of forward movement of the piston. It is up to the respective end position, in which again latched provided for fixation.

It is the moving forward of the sleeve to adjust the stop 33 in the position of the short stroke is preferably in progress before this process crimping or, respectively, during the corresponding forward movement of the piston, to ensure through the appropriate timing of the influencing means 12 of the adjustable stop 33. Such an intermediate position is shown, for example, figure 9, but without connection head 7 device with a pressing device 1. Shows an intermediate position can be achieved only when the effect on the piston rod of the hydraulic cylinder-piston system.

In shown in figure 10 and 11 the front position of the stop 33 is one of the influencing means 12 or, respectively, one of the rollers 12 when the piston back after exceeding the maximum the aqueous pressure or accordingly, by control of the user rests against the end surface 42 of the housing 38 stops, resulting in a supporting member 14 and the piston rod 11 against the action affecting the centering projection 19 of the piston rod 11 by the spring force 18 compression is called stop. Due to this stop falling pressure in the hydraulic chamber of the hydraulic cylinder before the piston 5, which leads to the closing of the exhaust valve.

In this forward position of the piston 5 and, respectively, impinging means 12 stroke corresponds to approximately half of the stroke of the piston in the position long stroke, for example 40 mm at the long course of about 80 mm.

Although the adjustable stop 33 with the sleeve 34 in the example shown in the field of removable head 7 devices, the proposed solution may also be provided in the pressing device 1, the cylinder of which is connected with the tool without the possibility of removal.

In addition, such a system with an adjustable stop 33 to change the stroke of the piston can also be used with other pressing nozzles shown instead pressing circuit 20, for example with pressing jaws 8", according pig that at the other end of the control levers 30 form an extrusion orifice 43, if necessary, to receive a removable press inserts.

The proposed system is EMA may also be provided for manual pressing device, shown in Fig, which is made in the form driven by a lever operating device. In accordance with that required to move the piston 5, the pressure is not created by an electric motor, and manually by pumping the lever 44.

In addition, there is the possibility of incorporating the proposed system in the pressing device 1 shown in Fig, which is made in the form accepted by one hand of the device containing the subject to grip with one hand gripping region 45 in which is provided the motor for the application of hydraulic pressure.

Equipped with control levers 30 of different lengths pressing sponge 8 and 8' are shown separately on Fig and 15. On Fig shows the different sponge superimposed on each other to illustrate the differences in side control levers, with a shorter control levers 30 and pressing the sponge 8' shown in phantom lines.

Shown in Fig each pressing sponge 8 to load beginners moving from position a long stroke affecting means 12 provided with a control surface with length l impact, which is aligned with a longer piston stroke.

The corresponding length l' is made to load a shorter course of the piston pressing jaws 8' corresponding to the half size l longer pressing jaws 8.

As shown, in addition, Fig, both pairs of pressing jaws 8 and 8' is made on the side effects the same, in accordance with this also have the same angle α in the neutral position.

Control surfaces 32 of the control levers 30 are different in terms of its angle when interacting with acting means 12. Thus, the control surfaces 32 of the elongated pressing jaws 8 in terms of convex curved with the radius decreasing from the free end of each of the control levers 30 during the further passage of the control surface 32.

In accordance with this due to the load acting means 12 first is relatively steep angle for cultivation pressing jaws 8, which during the further forward movement of the piston and the corresponding impact of the rollers 13 on the control surface 32 is greatly reduced due to the concave execution control surfaces 32.

This angle when made shorter pressing jaws 8' is steeper compared to the more long pressing jaws 8 on all routes of exposure, except done in the area of the free ends of the control levers 30 of the initial surfaces. In neutral position of the pressing jaws 8', as shown in Fig that control p the surface 32 or accordingly, when viewed in terms of their marginal edges that are almost parallel, except for those at the ends of the primary surfaces, if necessary, with the wedge trend of convergence in the direction of sections 31 impact.

Due to the different angles of the control surfaces 32, while maintaining the same thrust force of the piston subject to the pressure test fittings attached different pressing energy. While pressing apply efforts in forging shed can be different, for example, when large quantities of turn.

In addition, if necessary, in addition to changing the stroke of the piston can also change the thrust of the piston, for example by regulating pressure point spring-loaded hydraulic valve.

All of the disclosed features are (in themselves) are essential for the invention. The disclosure of the application fully activated also disclose content relevant/attached priority materials (copy of the prior application), also to include the characteristics of these materials in the formula of the present invention.

1. Hydraulic pressing device (1)containing a piston (5) and cylinder (4) to influence pressing sponge(8, 8', 8"), when this rod (11) of the piston in any way connected with deistvuyuschimi means (12), characterized in that the direction of movement of the hydraulic piston (5) is provided an adjustable stop (33) to provide different end positions of the hydraulic piston (5) upon the return movement of the piston, the stop (33) is provided on the outside of the cylinder (4).

2. The device according to claim 1, characterized in that the stop (33) is made with the possibility of manual control.

3. The device according to claim 2, characterized in that the stop (33) is made adjustable by means provided in the radial direction from the outside of the cylinder (4) arm (35).

4. The device according to claim 3, characterized in that a handle (35) is made in the form of sliding relative to the cylinder (4) of the sleeve (34).

5. Device according to any one of claims 1 to 4, characterized in that the stop (33) is made with the possibility of fixing on the wall of the cylinder as a rigid element.

6. The device according to claim 1, characterized in that the influencing means are rollers (13).

7. The device according to claim 6, characterized in that the stop (33) communicates with the rollers (13).

8. The device according to claim 1, characterized in that it is provided with at least two pairs of different pressing jaws (8, 8'), made of different length (1, 1') of the site of interaction with the influencing means (12), the longer the site of interaction has a smaller angle of elevation corresponding vozdeistvuya the means (12) surface plot of the interaction.

9. Method of crimping of the fitting with the pipe by pressing the circuit (20) and having a piston stroke of the hydraulic pressing device (1)while pressing the circuit (20) has more than two links (21), and the crimping is performed with a certain pressing energy, characterized in that the pressure test carried out by a pressing device (1), pressing the energy of which is applied during crimping, change by changing the hard stop (33), which rests against the piston (5) to limit its movement, and for a given pressurization, it is set so that the pressure test perform in the course of continuously committed to the piston movements.



 

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17 cl, 3 dwg

FIELD: metallurgy.

SUBSTANCE: invention relates to field of materials pressure processing with usage of electric explosion energy of metallic conductor in liquid transmission medium and relates particularly, deformation and insertion of pipes of wide range of configurations and geometry in out-of-the-way place. Pipe is installed into opening of tube plate, it is located in the end of pipe pre-assembled structure, consisting exploding element in the form of ring made of foil, located at butt of strength cylinder made of dielectric, allowing through co-axial opening, in which rod electrode, connected to electric contact with central part of ring of foil. It is used the second electrode in the form of cogging metallic bushing, located in the cylinder for the condition of providing of fixations at its side surface of peripheral part of ring, connected to rod electrode and supporting on centering insulating chain gears of core insert with installed on it guiding cone and body of revolution, implemented from strength material. There is implemented location solid of revolution and director cone of mentioned structure in area of pipe straining, filling of pipe cavity by transmitting medium, waterproofing of pipe by flexible cork of one butt and ring insertion of other, implementation of electric explosion of exploding element. Herewith in used preframed structure of ring surface from foil are implemented with profile by hyperbolic function, thickness, increasing from peripheral to central part, metallic bushing is implemented with inner clamp at the end, core insert allows length, equal to length of solid of revolution and director cone with centering gear and connected to rod electrode by means of rubber cord, reinforced by metallic strand, diametre of which is equal to inner diametre of ring.

EFFECT: there are increased effectiveness of method and coefficient of efficiency.

6 dwg, 1 ex

FIELD: metallurgy.

SUBSTANCE: invention relates to pressure materials processing with usage of energy of electric explosion of metallic conductor in liquid transfer medium and relates, particularly deformation and piercing of pipes of wide range of configuration and geometry in out-of-the-way places. Pipe is installed into opening of tube plate, it is located at the end of pipe pre-assembled structure, consisting of exploding element in the form of ring made of foil, located at the butt of strength cylinder made of dielectric, allowing through co-axial opening, in which it is located rod electrode, connected by electric contact to central part of ring made of foil. It is used the second electrode in the form of clenching metallic bushing, located at cylinder from the condition of providing of fixation on its side surface of peripheral part of ring, connected to rod electrode and bearing on centering insulating chain gears of core insert with installed on it director cone and figure of revolution, implemented of strong material. It is implemented location of figure of revolution and director cone of mentioned structure in area of pipe straining filling of pipe cavity by transfer medium, waterproofing of pipe by flexible plug of one butt and washer of the other, implementation of electric explosion of explosion element. Additionally in used pre-assembled structure of ring surface made of foil are implemented with profile by hyperbolic function, of thickness, increasing partly. Core insert is connected to rod electrode by means of filler, reinforced by metallic conductors, allowing at side surface symmetric longitudinal stringers, external diametre of which is equal to inner diametre of pipe.

EFFECT: there are increased method efficiency and coefficient of efficiency.

6 dwg, 1 ex

FIELD: welding jobs.

SUBSTANCE: invention relates to the methods of preparing the ends of pipes with inner polymer coating for welding, and can be used in repair of pipelines. The proposed method consists in the following. A tip with a rubber seal ring is fitted into the pipe with inner polymer coat, the aforesaid seal ring being place on pre-compressed smaller-diameter tip part, some 150 to 200 mm-long. Then using a mandrel, the aforesaid smaller-diameter part is expanded for the pipes ends sizes and shapes to match.

EFFECT: sealing of welded pipes, simpler procedure.

1 dwg

FIELD: plastic working of metals, namely processes for forming butt welded seams on tubes at making tube studs of U-shaped tube bundles using effect of localized hot plastic deforming of welded seam and near-seam zones.

SUBSTANCE: method comprises steps of preliminarily working tube ends by expanding them from cylinder to cylinder; assembling tubes with use of mandrel and placing intermediate member of additive material between joined end surfaces of end portions of tubes sized by expansion and end surfaces of step ring. Welded seams are formed by argon-arc welding due to melting material of intermediate member at its both sides adjacent to tube ends. The intermediate member is heated up and it is subjected to hot radial squeezing while concentrating its initial deformation in surface layers according to position of ring steps, welded seams and near-seam zones on mandrel for providing size of their outer diameter equal to initial outer diameter of tubes.

EFFECT: improved quality of welded seams.

8 dwg

FIELD: plastic metal working, possibly in crimping machines.

SUBSTANCE: crimping die set and coupling are used for holding worked part in crimping machine. Coupling is placed onto worked part with possibility of unclamping and it has fist clamping portion and second clamping portion mutually joined through hinge. Crimping die set may be inserted to crimping machine. Said die set has groove for worked part and recess for coupling on its working surface. Recess for coupling has configuration necessary for holding coupling in it. In order to crimp part in crimping machine, coupling is arranged around part in predetermined position and then it is tightened around part. Coupling and article are inserted into recess for coupling and groove for article respectively in crimping die set. Then die set with coupling and article is placed into crimping machine.

EFFECT: enhanced efficiency and reliability of crimping process.

13 cl, 6 dwg

FIELD: ventilation and air conditioning.

SUBSTANCE: connection by tight folded seam of two flexible metal pipes, sections of pipelines, segments or elbows of pipes used to transmit flows of gas is provided with double fold in form of flange at end of first pipe enclosed by second double fold made on end of second pipe at least with partial adjoining to shape and provision of enclosing solid metal sealing. Connection is formed by outward flanging universal bending or edging machine provided with forming rolls installed for rotation and feed rolls installed fro displacement in one plane. Said rolls are set into motion by motor and project from machine table. At first stage of operation double in form of flange is made on end of first pipe, and at second stage, step member is formed on end of other connected pipe. Width of step member exceeds size of double bend in form of flange. At third stage member is driven over double bend and projecting part of step member is pressed tightly to double bend with enclosing of bent and provision of sealing. Shifted lower roll of device is made in form of hollow shaft accommodating drive shaft carrying axially secured forming roll. Feed roll is made in form of hollow shaft which accommodates drive shaft carrying upper shifted forming roll. Feed roll and lower are mounted in slides to provide synchronous displacement. Rolls are also installed in slides for displacement in direction of axially secured forming roll and shifted lower roll.

EFFECT: provision of high tightness of connection.

4 cl, 11 dwg

Joining method // 2254955

FIELD: machine engineering, namely joining of constructional members of articles, for example flexible members and tips.

SUBSTANCE: method comprises steps of changing shape and size at least of one of joined members at using forces of interaction of electromagnetic fields of electric currents to be passed through electric current lead. Shape and size of joined members are changed due to moving movable members of shaping tool by action of forces caused at direct interaction of electromagnetic fields of electric currents. On portions of electric current lead turned to movable members of shaping tool electric current are passed in one direction while moving said portions together with movable members of tool. On portions of electric current lead remote from movable members electric currents are passed in opposite direction and motion of said portions is limited by means of restriction members.

EFFECT: enhanced efficiency of process, lowered energy consumption of used equipment.

4 dwg

FIELD: plastic working of metal.

SUBSTANCE: clamping-tool device 29 in the form of tongs for placing mechanic fixing organs includes first member for placing, limiting and (or) measuring path portion, length or distance at arranging fixing organ; second member for placing, limiting and (or) measuring at least one component of effort created at moving or overcoming path portion in fixing organ or by means of fixing organ.

EFFECT: enhanced quality of assembling process.

9 cl, 9 dwg

The invention relates to the field of metal forming

FIELD: plastic working of metal.

SUBSTANCE: clamping-tool device 29 in the form of tongs for placing mechanic fixing organs includes first member for placing, limiting and (or) measuring path portion, length or distance at arranging fixing organ; second member for placing, limiting and (or) measuring at least one component of effort created at moving or overcoming path portion in fixing organ or by means of fixing organ.

EFFECT: enhanced quality of assembling process.

9 cl, 9 dwg

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