A device for curling the edges of the hollow parts

 

(57) Abstract:

The invention relates to a pressure treatment of materials, in particular to a device for Curling the edges of the hollow parts, and can be used for the manufacture of shells metal drums with a removable upper bottom intended for storage and transportation of food fuel and bulk materials. The invention consists in improving the quality of Curling of the edges of the hollow cylindrical thin-walled parts simultaneously reducing the complexity of the manufacturing products of the type barrels. The device is equipped with a support protivotokom, the axis of which is perpendicular to the axes of the pressure deforming rollers, mounted symmetrically on the stationary plate, with the possibility of axial movement, with the support proteonomic secured by folding the l-shaped centraalstaal lever on plate, an adjustable stop, additionally, the radii of the main grooves of the pressure deforming rollers and support protivorecija when closing copy final shape formed by the sealing of the curl, and centering the larger flange of the pressure deforming rollers with a height equal to the diameter of the fact of the shoulder anchor protivorecija has a support platform with a width, equal to the diameter of the curl, and located relative to the side surface of the major groove of the larger flange of the pressure deforming roller at a distance equal to the thickness of the material of the deformable hollow parts. The device can be used for Curling the edges of the metallic casing barrels with a capacity of up to 200 DM3from the side of the removable top of the bottom, tighten the Hoop. 4 Il.

The invention relates to a pressure treatment of materials and can be used for the manufacture of shells metal drums with a removable upper bottom intended for storage and transportation of food fuel and bulk materials.

A device for seaming the edges of the bottoms [1] However, the location of the deforming rollers relative to the C-frame does not allow complete sealing of the edges of hollow products. In addition, the device is difficult by design.

Closest to the proposed device is a method of manufacturing thin-walled hollow axisymmetric products [2] in which the Curling edge of the semi-finished rollers perform the outer collar.

The downside of it is the lack of support roller in the schema operations perming chrome is valid in the manufacture of barrels type II top with removable bottom tied down Hoop according to GOST 13950-54, and leads to the need for additional operations straightening.

In addition, for the implementation of the known method requires a special complex seaming equipment that has multiple drive devices.

An object of the invention is to improve the quality of Curling of the edges of the hollow cylindrical thin-walled parts simultaneously reducing the complexity of the manufacturing products of the type barrels.

The task is solved in that the device for Curling the edges of the hollow parts containing pressure deforming rollers, the centering mandrel and the faceplate, mounted in the Chuck of the machine, provided with reference protivotokom, the axis of which is perpendicular to the axes of the pressure deforming rollers, mounted symmetrically on a fixed plate attached to the back of the headstock of the lathe, with the possibility of axial movement, with the support proteonomic secured by folding the l-shaped centraalstaal lever on plate, an adjustable stop, additionally, the radii of the main grooves of the pressure deforming roller and support protivorecija when closing copy of the final form about the Noah diameter of the curl, has an angle of approach, is inversely proportional to the diameter of the inner cavity of the deformable part, and the flange of the support protivorecija has a support platform with a width equal to the diameter of the curl, and located relative to the side surface of the major groove of the larger flange of the pressure deforming roller at a distance equal to the thickness of the material of the deformable hollow parts.

Using the proposed device is the Curling of the edges of the hull metal barrels with a capacity of up to 250 DM3from the side of the removable top of the bottom, tighten the Hoop.

The presence of the proposed device of the invention is demonstrated by the fact that there is no such simple devices for Curling the edges of the hollow parts on the body of the drums with a removable upper bottom using conventional lathe, made in the manner described above, with high versatility and precluding the formation of corrugated curl due to the introduction of protivorecija and Refine the configuration of the profile of the work of the grooves and the introduction of the guide bevel on the lead part of a larger flange deforming roller.

The originality of the proposed technical solutions bookmark curl, and the angle of approach, is inversely proportional to the diameter of the internal cavity of the roll barrel, the collar of protivorecija has a support pad width equal to the diameter of the curl, and the axis is located perpendicular to the axes of the pressure rollers.

In the absence of these changes in the design of the rollers when the sealing folds on the lateral surface of the body of the barrel and the shirring of the curl, which makes it impossible dense, tight fit compression wrap to cover the barrel when it is clogged.

In addition, to allow removal of the barrel from the lathe lever, which is attached to proteonomic made curved with the axis of rotation, which lies on the line of centers of the roller and the axis of rotation of the barrel. Also the device is equipped with adjustable compensating the difference of the diameters of the shells of drums arising due to inaccuracies of manufacture.

In Fig. 1 shows the device in the initial stage of Fig. 2 is a view As in Fig. 1, illustrating the arrangement of the rollers; Fig. 3 node I in Fig. 1 in the final stage of iron; Fig. 4 cross-section B-B in Fig. 2.

In Fig. 1 shows a device for Curling the edges of the hollow parts, which contains a faceplate 1, Zack is stalego move, evenly placed on the face plate 3 /of Fig. 2/ rotating pressure deforming rollers 5 having a flange 6 /of Fig. 3/ with the bevel 7 and major groove 8, interacting with the body of the barrel 9. The height of the flange 6 is equal to the diameter d3curl 10 /h=d3/, and the angle of the bevel 7 is determined by the formula

< / BR>
where Dbthe barrel diameter,

dpthe diameter of the flange 6 of the deforming roller 5,

d3the diameter of the curl.

No angle on the flange 6 is not possible due to niaprazine the surface of the deforming rollers 5 fully inserted into the cavity of the barrel 9, which at its rotation will inevitably lead to the cutting of the material of the body of the barrel 9 sharp inside edges of the flange 6.

When the angle exceeds a design value is a loose fit the surface of the bevel 7 to the inner cavity of the barrel 9, leading to the formation of folds on its surface.

Under the condition of equal height h of the flange 6 to the diameter d3curl 10 eliminates skladkoobrazovaniem in the zone of formation of the curl and is provided preliminary centering of the barrel in the device.

Reference proteonomic 11 having a support pad 12 of a width S, is equal to the diameter of the curl 10 /S=d3/ and nachola body of the barrel 9, attached to the t-shaped lever 13 /Fig. 2/, the axis 14 which is located on the faceplate 3 on line 15 centers of rotation of the barrel 9 and the reference protivorecija 11. Rotation of the lever 13 is limited by a stop 16 /Fig. 4/ with the adjustment bolt 17 and the latch 18, which are used for compensating the difference of the diameters Dbroll corps of drums 9.

In the absence of site 12 /Fig. 3/ support protivorechite 11 possible bias protivorecija 11, since the presence of pad 12 provides semicentral of protivorecija 11 on the outer surface of the barrel 9 at its rotation. The width S of the support platform 12 is determined by measuring the zone of folding on the outer surface of the deformable end of the barrel 9, numerically equal to the drawing, the diameter of the deformable curl d3.

The gap between the inner surface of the flange 6 and the base platform 12 must provide for free passage all the way into the major groove 8 of the edge end of the body of the barrel 9 at the initial deformation and is determined by the thickness t of sheet material deformable hollow parts.

The device operates as follows.

The body of the barrel 9 /Fig. 1/ set the plate on the faceplate 1, embodied in the cartridge 2 lathe 5 is applied to roll the edges of the barrel 9. Due to the presence of the bevel 7 /Fig. 3/ deforming rollers 5 fully enter into the internal cavity of the barrel 9, providing pre-focus. When the rotation of the drum 9 starts simultaneous flow in the horizontal direction tailstock 4 pinned in her faceplate 3 with deforming rollers 5. Is the bend of curl 10.

For the formation of correct round shape of the curve 10 in cross section with a stable diameter d3the device offers support proteonomic 11, which eliminates the shirring curl 10 and the body of the barrel 9 in the area of education. To compensate for the difference between the diameters Dbcorps of drums 9 arising due to inaccuracies of manufacture, the device offers the adjustable 16 /Fig. 4/.

To allow removal of the barrel housing 9 from the machine after Curling of the edges of the lever 13, which is the reference proteonomic 11 made rollaway in the direction opposite to the direction of rotation of the barrel 9 /Fig. 2/.

The device allows the manufacture of steel drums type II top with removable bottom, strapped with Hoop, fully complying with the requirements of GOST 13950-84, without the use of flow lines and complex special equipment.

Thus, the use of the invention allows to achieve the following results:

obtaining high-quality curl without corrugations when Curling the edges of the barrel by tightening Hoop removable top bottom due to the introduction of the reference protivorecija, the axis of which is perpendicular to the axes of the deforming rollers fastened by means of the l-shaped lever to the faceplate, and the centering flange deforming rollers have an angle of approach, the magnitude is proportional to the diameter of the internal cavity of the roll barrels;

reducing the complexity of the manufacturing process of the drums through the use of more simple, universal machine tools;

achieving high versatility due to more fully exploit the underlying model lathe, on which you are installing the proposed device for Curling the edges of the hollow parts, and machine setups and adjustments, providing the possibility of making barrels with a wide range of diameters.

The realization of the potentialities of the proposed device does not require high material and energy consumption compared to the traditional way of mass production of barrels for sakatos the I parts, containing pressure deforming rollers, the centering mandrel and the faceplate, mounted in the Chuck of the machine tool, characterized in that the device has support protivotokom, the axis of which is perpendicular to the axes of the pressure deforming rollers, mounted symmetrically on the stationary plate, with the possibility of axial movement, with the support proteonomic secured by folding the l-shaped centraalstaal lever face plate with adjustable focus, in addition, the radii of the main grooves of the pressure deforming roller and support protivorecija when closing copy final shape formed by the sealing of the curl, and centering the larger flange of the pressure deforming rollers are made with a height equal to the diameter of the curl, has an angle of approach, is inversely proportional to the diameter of the inner cavity of the deformable part, and the flange of the support protivorecija has a support platform with a width equal to the diameter of the curl that is located relative to the side surface of the major groove of the larger flange of the pressure deforming roller at a distance equal to the thickness of the material of the deformable hollow parts.

 

Same patents:

The invention relates to the processing of metals by pressure and can be used in the production of building metal rocketry

The invention relates to the processing of metals by pressure, in particular to the forming of large parts of conical shape

FIELD: mining industry, particularly for oil and gas extraction from underground formation, namely to join drill pipe sections with the use of strut included in threaded pipe connection.

SUBSTANCE: metal item forming method involves mechanical deforming metal strip, for instance slotted strut formed of alloy selected from group containing Cu/Be, Cu/Sn, Cu/Ni, Cu/Ni/Sn, Cu/Zn, Cu/Si, Ni/Cr, Cu/Al, Al/Ti, Al/Mg, Al/Zn to obtain formed blank including hollow section made as truncated cone without helical slot; mechanical deforming conical section to form helical slit in it.

EFFECT: prevention of plastic threaded connection deformation, increased reliability of drill pipe connection, simplified strut production technology.

34 cl, 9 dwg

FIELD: ammunition; shaped charges.

SUBSTANCE: proposed method includes rolling of disk blank to get conical profile, and subsequent annealing. Cone is prepared by rolling and cylindrical part of facing is formed on mandrel by soft pressure molding. Length of generatrix of previously obtained cone is not less than summary length of generatrix of cone of ready facing and its cylindrical part. Bevel is made over end face of cone outer surface before pressure molding.

EFFECT: prevention of formation of bulges in manufacture of charge facing.

2 dwg

FIELD: machine engineering, namely processes for making hollow cones.

SUBSTANCE: method for shaping hollow cone of tubular metallic blank comprises steps of heating tubular metallic blank till plastic state due to action of mandrel on outer surface of blank rotating at high speed and simultaneously changing shape of blank by pressure of mandrel upon the same surface; using flat rear part of cutter as mandrel and inclining said part of cutter relative to rotation axis of blank by angle equal to that between generatrix of shaped cone and rotation axis of blank.

EFFECT: simplified process for shaping cone due to using as mandrel flat rear part of cutter.

FIELD: manufacture of metallic vessels.

SUBSTANCE: method comprises steps of making blank in the form of coiled web with strips fluid-tightly secured to its surface; forming cylindrical body by uncoiling coiled web and joining its mutually abutted lengthwise edges; reinforcing body by means of helical rigidity ribs due to deforming strip and body part under said ribs; fastening bottom and lid. Before reinforcing cylindrical body with use of helical rigidity ribs, detachable soft jigs are arranged on body from above and below and they are fluid-tightly secured to end edges of body. Said jigs are made of water- and air impermeable elastic material.

EFFECT: lowered labor consumption, enhanced efficiency.

3 dwg, 1 ex

FIELD: plastic metal working, namely bending die sets for making cone parts.

SUBSTANCE: die set includes base in which cone punch and changeable ring with supporting end face are mounted; moving plate with cone die. Die set is provided with device for pressing edges of sheet blank; said device is in the form of guides and spacing plates into which pressure bolts are screwed. Die is provided with changeable insert of end holder of blank and it has annular grooves on inner surface and through slit. Punch has in outer surface annular grooves and it is provided with gasket preventing burning and arranged along generatrix in radial direction coinciding with that of through slit of die. Guide members for pressing edges of blank are secured to die along is through slit. Spacing plate with pressure bolts are mounted in said guide members.

EFFECT: improved design, increased useful life period of die set, enhanced quality of formed parts.

1 dwg

FIELD: machine engineering, namely manufacture of bottoms of pressure vessels, for example shaping cone-like bottoms of barometric mixers in small-batch production.

SUBSTANCE: method is realized by bending blank along profile of shaping punch and not by rolling it around it. Seam is welded after bending when part is still on shaping punch. Such technique of joining ends of bottom body eliminated influence of temperature drops upon structure of bottom. In order to perform local heating of bent portion of cylindrical part of bottom, gas torch is used. It prevents necessity for heating the whole blank. Special changeable holder for bending bottom blank and for imparting to it profile of shaping punch is provided. Said holder includes body where freely rotating pressure rollers are mounted in pivots. Rotation axes of said pressure rollers are parallel to generatrix lines of lateral surface of cone like shaping punch in zone of their touching and they are spaced from them by the same distance.

EFFECT: manufacture of bottoms with minimum capital investments and minimum fluctuations from constructional demands.

2 dwg

FIELD: manufacture of cylindrical products of square blanks.

SUBSTANCE: method comprises steps of blanking square blank from belt or strip; realizing multi-transition combination type drawing; performing all operations by means of cylindrical punch in cylindrical dies; preliminarily forming slopes in corners of square blank. Said slopes are inclined relative to straight lines normal to square diagonals by angle 3 - 5° till their value equal to thickness of ready article wall. Height of slopes consists 1.3 - 1.5 of difference between radiuses of circles described and inscribed to square blank.

EFFECT: lowered number of transitions, simplified design of tool.

2 dwg, 1 ex

FIELD: plastic working of metals, namely outer thread forming on end portion of tube blank, mainly on nipple end of adapter for pump-compressor tubes.

SUBSTANCE: method comprises steps of producing tube blank with outer diameter of end portion equal to inner diameter of threading die and with inner diameter determined according to mathematical expression received by experimental way; placing end portion of tube blank in die with internal thread whose profile corresponds to that of thread to formed on blank; performing expansion from inside of said end portion while filling with blank metal thread grooves of die during one pass by means of cone punch having sizing collar whose diameter is equal to inner diameter of ready part.

EFFECT: improved quality of outer thread on end portion of tube blank, simplified process of thread forming.

5 cl, 2 dwg

FIELD: plastic working of metal, namely formation of inner thread on coupling end of tube blank.

SUBSTANCE: method comprises steps of producing tube blank with inner diameter of its end portion equal to outer diameter of threading punch and with outer diameter determined according to mathematical expression received experimentally; placing end portion of tube blank on stationary tool having threaded working surface whose profile corresponds to that of formed thread; performing plastic deforming of said end portion while filling with blank metal thread grooves of tool till forming target profile of thread due to squeezing it during one pass by means of cone die having sizing collar whose diameter is equal to outer diameter of ready part; using threaded punch as stationary tool with threaded working surface.

EFFECT: improved quality of inner thread on end portion of tube blank, simplified process of thread forming.

5 cl, 2 dwg

FIELD: technological processes.

SUBSTANCE: invention is related to manufacture of high-strength thin-walled cylindrical shells with wall thickness of less than 0.2 mm. Tubular billet is produced by method of hot pressing from martensite-ageing steel with nickel content of 15-20%. Billet is subjected to thermal treatment by heating up to temperature of 900÷940°C with maintenance at this temperature for 0.8÷1.8 hours and further cooling outside. Repeatedly billet is heated up to temperature of 780÷840°C and maintained at this temperature for 0.7÷1.5 hours and cooled outside. Cutting of billet internal and external surfaces is carried out, then shell rotary extrusion takes place in several preliminary operations and final operation. Thermal treatment for stress relieving after every operation of rotary extrusion is performed at temperature of 800-850°C with maintenance at this temperature for 1÷3 hours and further cooling outside. Best results of method implementation are achieved with application of martensite-ageing steel that contains rare-earth metals.

EFFECT: method allows to increase quality of shells and output of proper produce.

3 cl, 4 dwg, 1 tbl

Up!