Device for opening and changing dies

 

(57) Abstract:

Usage: in the press-forging equipment, namely, devices for opening and changing of the dies on the press. The inventive device includes a base on which is mounted a number of fixed shelves and swivel brackets. Shelves and brackets feature a punch plates, with means for fastening the lower and upper parts of the stamp, United by column guides in a single die block, and connected bistrotheque ties with the formation of the rigid frame. The device optimally solves the problem of reliable operation due to the presence in its structure of a single rigid base on which is mounted a number of postanovochnyh plates, made in the form of tables, each of which has an individual mechanism move in a vertical plane, made in the form of a helical pairs consisting of screws, and nuts pressed into the stepped sleeve, which in turn are rigidly connected with the worm wheel of the worm gear, and the latter is connected through bevel gears with a common drive from the engine shaft, which ensures simultaneous disclosure across the plane p is aniu, namely, devices for opening and changing dies.

A device for automatic change of the dies on the press, which contains a rack placed in two tiers guides and mechanisms for moving the dies from the lower rails, the lift to move the stamps from the lower rails to the top, the mechanism for moving the stamp from the top of the guides to the press, a vertical column on which level guide the pins are mounted with the possibility of rotation of the actuator about the axis of the column P-shaped desks to receive stamps [1]

The disadvantage of this device is that it only provides for the replacement of stamps, but does not provide disclosure, i.e., the distance of its bottom half from the top, additionally, it is advisable to change dies minor dimensions used on presses with an open bed.

A device for opening and changing dies spar presses [2] contains a base on which is mounted a number of fixed shelves and movable brackets interconnected by vertical columns with the formation of a rigid frame and are equipped with powered punch plates with fastening means, rived the opening and closing of the tool, drive balancing cylinders swivel brackets, rods which are pivotally connected to the rocker arm rigidly mounted on a common horizontal column posted on the trunnions in the bearings mounted on the stationary racks, in addition to the aforementioned horizontal column rigidly mounted swing arms and the drums with your fingers, on which is mounted a traction chain, kinematically connected through the guide rollers with additional actuating cylinders swivel brackets, and all the drives are United by a common control system.

Disclosure stamp it happens when rigidly fixed on the rack of the lower half of the stamp, and the upper half with the guide columns is lifted by the hydraulic cylinders, rigidly connected with the upper punch plates.

The lack of such disclosure stamp is that it is extremely difficult to ensure that the existing management system in its disclosure of reliable synchronous movement of the three pairs of cylinders, and hence the upper half of the stamp as a whole, since it is possible to deform it guides the high wear of the column guides and nests for their installation. Moreover, the above-mentioned process of wear columns with nests compounded by the fact that the basis under the shelving is made detachable and does not have sufficient rigidity, as it consists of three parts, mounted using fasteners.

Shortcomings in the invention eliminates those that drive the opening and closing of the tool is made in the form of drive tables, equipped with means for fastening the lower part of the stamp, each of which has a rod with restrictive washers with the possibility of interaction of the latter with the sensors of the control system, and pivotally mounted in each table on the upper ends of the two screws screw, nut, each of which is pressed into a cylindrical stepped sleeve, the inner cavity of which is implemented as a guide for the lower probe screws provided with the hinge installed additional sleeve, moreover, the outer surface of each of the stepped sleeve is rigidly connected with the worm wheel of the worm gear and placed on the bearings in the housings of the above-mentioned gears mounted on a common base, and worms these gearboxes are connected in series between themselves by means of intermediate elements with conical I and motor-reducer shafts with intermediate elements, and last mentioned trunnion horizontal columns provided on one side of the attachment place for the installation of the controller, and on the other side of the Cam with a profile made by the cosine law, with the possibility of interaction of the latter through an intermediate element with pressure regulator control system.

This set of essential features in the claimed device gives a positive technical result, namely to increase the reliability of the device.

In Fig. 1 shows a device for opening and changing of the dies; Fig. 2 is a view in plan; Fig. 3 And Fig. 1; Fig. 4 section b-B in Fig. 2; Fig. 5 section b-b In Fig. 1 (extension mechanism of the table), Fig. 6 section G-G in Fig. 1 (drive tables), and Fig. 7 diagram of the hydraulic principle of Fig. 8 section D-D in Fig. 2; Fig. 9 section E-E in Fig. 2.

Device for opening and changing of dies comprises a base 1 on which is mounted a number of fixed shelves 2 and the pivot bracket 3. Mentioned racks and brackets feature a punch plates 4 by means of fasteners (not shown) of the lower 5 and upper 6 piece punch (tool) 7, obyedinenny the 9 with the formation of the rigid frame.

Drive the opening and closing of the tool contains three tables of 10, performing the role of the lower punch plates, each of which has a rod 11 with restrictive washers 12 and 13, which can interact with sensors (not shown) of the system of government, limiting the lower and upper position tables. Each table through the sleeves 14 and nuts 15 pivotally mounted on the upper ends of two screws 16 screw pairs. The nut 17 screw placed in the upper part of the stepped cylindrical sleeves 18 and into the internal cavity of the above-mentioned sleeves placed lower ends of the screws 16, which by means of nuts 15 pivotally mounted additional sleeve 19 that serve as guides for the screws 16. The outer surface of each of the stepped sleeve 18 is rigidly connected by means of pins 20 with the worm wheel 21 of the worm gear 22 and placed on the bearings 23 in the housings 24 mentioned gears mounted on the base 1, and the worms 25 these gearboxes are connected in series between themselves by means of a coupling 26 with the bevel gear 27 mounted on said base, which in turn by means of the couplings 26 and rollers 28 and 29 and the cylindrical gear 30 connected with each other and with the General Veselaya cylinders 32, the rods are pivotally connected to the rocker arm 33 rigidly mounted on a common horizontal column 34 placed on the pins 35 with the flanges of the bearing 36 mounted on the stationary racks 2. In addition to the mentioned column 34 is rigidly fixed by means of fasteners 37 to the flanges of the pins 35 of the swing arms 3 and is welded to the reel 38 with the fingers, on which is mounted the conveyor chain 39, kinematically connected through the guide rollers 40 additional actuating cylinders (41 direct and inverse 42) swivel bracket 3. Above the drive cylinder device combined total hydroschemes, which is shown in Fig. 7.

Part of the hydro scheme includes the following elements: station 43 dual pump 44 and 45, the control and regulating equipment (not shown), the distribution slide valve 46 to control the driving of the balancing cylinders 32, a distribution valve 47 for controlling direct 41 and 42 reverse the cylinders. The backbone of the power cylinder 32 is a regulator 48 pressure, and overpressure pressure in the mains supply mentioned cylinders installed chokes 49 with a non-return valve 50. In the mains power cylinders 41 and 42 estimating. The pressure change is effected by regulating the finger 52 and Cam 53 mounted on the right trunnion 35 of the column 34. For backwater pressure in the cylinders 41 and 42 in the line of their installed power chokes 54 with a non-return valve 55. Stop swivel bracket in the closed and open positions is supplied from the controller 56, involved from the left trunnion 35 of the column 34.

The operation of the device for opening and changing of dies is performed in the following order.

In the initial position the swing arms 3 are in the open position, i.e. on the right side of the fixed shelves 2, tables 10 are in the lowest position, i.e. 10 mm below the fixed racks, and couplers 9 are opened, i.e., are in a horizontal position. Shop vehicle assembled stamp, consisting of the bottom 6 and top 7 parts United by guide columns 8, is mounted on the left side of the stationary racks 2. Subsequent actuation of the steering bracket 3 is translated to the closed position (rotated 180about), and couplers 9 are transferred in a vertical position with their subsequent fixation and formation of rigid frames with a fixed degree is t which through the clutch 26 of the ultimate moment and spur gear 30 is transmitted to the shafts 28 and 29 on the bevel gears 27, and from them through the coupling 26, the rotation is transmitted further to the worm gear 22, the screws 25 which are in engagement with the worm wheel 21, which in turn, through the pins 20 are rigidly connected with stepped bushing 18, which is pressed nut 17 screw. Rotation of the screws 16 mentioned screw is transferred to the table 10, which due to the presence of rigid connection between the said transmission elements synchronously rise with the stamp up to contact him with punch plates 4 swing arms 3, after which the motor 31 is turned off due to interaction restrictive washers 13 with the sensors of the control system. Then fix the bottom 5 and the top 6 of the stamp 7 using T-bolts (not shown) in the grooves of the tables 10 and punch cards 4 swing arms 3 and reverse turning of the motor 31 provide synchronous movement of the tables in the lower position, through the disclosure of the stamp 7, resulting in its lower part 5 is lowered to the racks 2, and the motor 31 is turned off by the interaction restrictive washers 12 sensors of the control system, the upper part 6 of the stamp 7 with guide columns 8 remains fixed in the punch p is Westside by switching the pumps 44 and 45 with the subsequent flow of operating fluid through the distributor valve 46 in the rod cavity drive balancing cylinders 32, the result appears tug on the yoke 33, which will be through the column 34 is transmitted to the brackets 3, trying to turn the latter clockwise. However, this effort is not enough to rotate the brackets 3 180abouttherefore , the working fluid simultaneously through a distribution valve 47 is supplied to the rod end of the cylinder 41 and moves them to the rods with a traction chain 39 to the left. The conveyor chain comprises guide rollers 40 and the reel 38 with the fingers and additionally helps to rotate the brackets 3 clockwise.

Torque on the column 34 is determined by the formula

Mkr=G lcos where G is the weight of the upper part of the stamp;

l is the distance from rotation axis to the center of gravity of that part of the stamp;

the angle of rotation.

When the horizontal position of the upper stamp, when 0, and cos 1, torque to start rotation of the brackets should have a maximum value. As you rotate the brackets 3 torque decreases according to the cosine law, and as the Cam 53 is equipped with a profile made by the cosine law, the pressure in the arteries of direct cylinder 41 will decrease according to the law of cosine. When the center tegest the art of stamp together with the swing arm 3 will begin to descend under its own weight on the right side of the shelves 2. The pressure in the rod cavity opposite the cylinder 42 will increase from minimum to maximum, as it is controlled by the same Cam 53. Dropping of the swing arms 3 with the upper part 6 of the stamp 7 is prevented by the presence in the line of cylinders 42 chokes 54 with a non-return valve 55. After 180aboutthe brackets 3 with the upper part 6 of the stamp 7 is lowered on the right side of the stationary racks 2, and the engine pumps off when the sequencer 56. Thus the stamp disclosed in two parts and the device is ready to re-tool for other details. After refitting the stamp is closed, and the operation of the device is performed in reverse order.

DEVICE FOR opening AND CHANGING of DIES containing a base on which is mounted a number of fixed shelves and swivel brackets interconnected by vertical columns with the formation of a rigid frame and are equipped with powered punch plates, with means for fastening the lower and upper parts of the tool joint through the column guides in a single die block, the actuator opening and closing of the tool, drive ur is new on the total horizontal string, posted on the trunnions in the bearings mounted on the stationary racks, besides the above mentioned horizontal column rigidly mounted swing arms and the drums with your fingers, on which is mounted a traction chain, kinematically connected through the guide rollers with additional actuating cylinders swivel brackets, and all actuators are United by a common control system, characterized in that the actuator opening and closing of the tool is made in the form of drive tables, equipped with means for wrapline the bottom of the stamp, each of which has a rod with restrictive washers with the possibility of interaction of the latter with the sensors of the control system, and pivotally mounted in each table on the upper ends of the two screws screw, nut, each of which is pressed into a cylindrical stepped sleeve, the inner cavity of which is implemented as a guide for the lower end of the screw supplied with the hinge installed additional sleeve, and the outer surface of each of the stepped sleeve is rigidly connected with the worm wheel of the worm gear and placed on the bearings in the housings gears, smarter eutocic elements with conical gears, mounted on said base, which is kinematically connected with a gear motor shafts with intermediate elements, and the horizontal axle of the column is supplied with one side of the attachment place for the installation of the controller, and on the other side of the Cam with a profile made by the cosine law, with the possibility of interaction of the latter through an intermediate element with pressure regulator control system.

 

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