SU1324725A1 - Automated complex for stamping large-size parts - Google Patents

Abstract

The invention relates to the processing of metals by pressure, in particular to the automation of sheet metal forming processes of large-sized blanks. The aim of the invention is the expansion of technological capabilities. This goal is ensured by the fact that the device for loading and unloading the press is made in the form of two drive carriages mounted for movement along the axis of the press on rail guides mounted on the press table on both sides of the punch axis at a distance corresponding to the overall dimensions of the workpiece. The entire stamping complex is equipped with a control system. The control system automatically moves one of the carts with the original blanks to the treatment area and discharges the processed products from the treatment area by another carriage. 1 hp f-ly, 7 ill. ((L with to 4

Description

The invention relates to the field of metal processing. pressurized, namely, to automate sheet metal forming processes for large-sized blanks.

The aim of the invention is the expansion of technological capabilities.

FIG. I but the proposed complex, the nlan; in fig. 2 - section A - A in FIG. one; in fig. 3 - movement of those. | 1 rounds; in fig. 4 shows a section BB in FIG. 3; in fig. 5 is a view of B in FIG. four; in fig. 6 is a view of FIG. five; in fig. 7 is a section d-d in fig. five.

The complex (Fig. 1) includes press 1, on which table strain 2 is installed, a sheet-laying machine 3 intended for discharging the original sheet blank from the foot to a gripping position with a device loading the press-strain, carts 4 and 5 moving along the transverse axis of the press along rack guides 6 fixed on the press table. Trolley 4 is designed to grip the original sheet blank, move it and load it into njTaMO. Trolley 5 is designed to capture the stamped product, moving it to the storage area and placing it in a pallet. The rail guides are connected along the edges by transverse beams on which shock absorbers-stops 7 are installed. The original sheet blanks are delivered to the working area of the sheet binder in stores 8, and the stamped products are stored in the nodetops 9. Stores 8 and pallets 9 are moved to the discharge zone - loading along the guides 10. Position 11 designates the initial sheet blank at the moment of loading of the press 2 of the press by the cart 4, position 12 - the stamped product at the time of its storage in the pan 9 by the cart 5.

Laying machine 3 (Fig. 2) consists of a frame 13, the shaft of which is mounted a power cylinder 14 connected with a cross-bar 15 on which vacuum shears 16 are mounted. In order for the cross-bar 15 not to be turned while lifting the workpiece, it is equipped with two tons gami 17, which, during lifting or lowering, the traverse 15 moves in the frame 13. The magazine 8 and the pallet 9 are structurally the same and consist of a tile on which the guide pins 18 limiting the overall dimensions of the workpiece or the stamped product are mounted. The magazine 8 and the rail 9 are provided with rollers 19, with which they can move in guide rails 10.

The rail guides 6 are fixed but both sides of the axle of the stamper on the table of the press 1 at a distance corresponding to the longitudinal overall dimensions of the workpiece, using the supports 20. Stamp for stamping parts (Figures 1 and 2 show a die for cutting a coal hole) consists of a top plate 21,

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mounted on the slider using the pads 22. On the top plate of the tag are mounted on a single column, column 23, punch 24, the sleeve 25, inside which is mounted a puller 26 interacting with an elastic block 27. The bottom plate 28 of the stamp is fixed on the press I table with the plates 29 . On the bottom plate 28 of the stamp set matrix 30.

Carts 4 and 5 are made constructively the same. They consist of a housing 31 (FIGS. 3 and 4), on which on a platform 32 a drive movement of carts is mounted. The body 31 of the trolley is made in the form of two L-shaped beams connected rigidly along the river beam. The drive includes an electric motor 33, on the shaft of which a gear 34 is mounted, interacting with a wheel 35 which is engaged with a wheel 36. The drive also includes a gear wheel 37 connected through a wheel 38

0 by a wheel 39. The wheel 35 is rigidly connected to the sleeve 40 by means of a pin 41 and mounted on the shaft 42 with the possibility of free rotation around the shaft. Similarly installed wheel 36 on the shaft 43. Shafts

42 and 43 are mounted on bearings 44 in sleeves 45 of platform 32. Bearings are fixed from axial displacement by spring rings 46 and caps 47. Gears 37 and 39 are made in the form of hollow housings of power cylinders, at the ends of which friction lining 48 is fixed. Inside the housings mounted 49, fixed from the possibility of axial movement along the shafts 42 and 43 by spring rings 50. The cases of the gear wheels 37 and 39 are spring-loaded relative to the wheels 49 by springs 51 installed between the pistons and the caps 52. On the last friction linings. The covers 52 of the gear cases 37 and 39 are connected to the shafts 42 and 43 by pins 53. To seal the cavities that form between

0, the front (left) ends of the wheels 49 and the internal front ends of the cylinder bodies of the wheels 37 and 39 are provided with seals 54 made in the form of, for example, rubber rings. Compressed air is supplied to these cavities through grooves in sleeves 55, sealed from leaks by seals 56, and channels made inside along the axis of shafts 42 and 43. Couplings 55 are fixed, and shafts 42 and 43 are rotatably mounted relative to the sleeves . The shaft 43 is connected through the coupling 57 and the stud 58 with the shaft 59, on which gear 61 is mounted on the tongue 60, which, when the trolley is moved, rolls through the rack guides 6. At the second end of the shaft 59, the second gear of the trolley is similarly mounted. The shaft 59 is mounted in the carriage body 3 on rolling bearings as are the shafts 42 and 43. The two other wheels of the carriage are non-driven and mounted in the carcase on rolling bearings on the axles as well as the shaft 59.

Pneumatic cylinders 62 (Fig. 5-7) are mounted on each L-shaped beam of the trolley body and are fixed symmetrically with respect to the cylinders 62 by two U-shaped brackets 63. The rod 64 of each cylinder 62 is connected to the rail 65, which interacts with the gear wheel 66 mounted on shaft 67 mounted rotatably in brackets 63. The rail 65 is mixed in guides 68 mounted on the vertical walls of the G-shaped beams of the carriage body 31.

On the shaft 67 between the vertical shelves of the U-shaped brackets 63, two double-arm levers 69 are fixed, one shoulder of which is made in the form of a fork interacting with the finger 70 of the double-arm levers 71, mounted with the possibility of rotation on the axis 72, also fixed between the vertical shelves of the U-shaped brackets . The other arm of the lever 69 is hinged to the strips 73, which are also pivotally connected to the end of the lever 74, which is mounted with its other end rotatably on the axis 72.

The shoulders of the levers 71 and 74 play the role of jaw tongs.

The cylinders 62 are mounted on horizontal shelves of L-shaped beams with the help of holders 75, made in the form of half-rings. The cylinders include a housing 76, a top cover 77, a bottom cover 78, a piston 79 connected to the rod 64. The piston, the caps and the rod are sealed with seals 80.

Complex for stamping large parts works as follows.

Store 8 with a stack of original sheet blanks, laid between the guide pins 18, and the pallet 9 along the guides 10 on the rollers 19 are moved into the loading / unloading zone. At this moment, the press slide 1 with the top plate 21 of the stamp, the punch 24, the sleeve 25, the puller 26 and the columns 23 is in the upper extreme position. The carriage 4 occupies the leftmost position, and the carriage 5 has the rightmost position, while they rest against the shock absorbers-supports 7 mounted on the transverse beams of the rail guides 6. The tongs of the carriages are in the open position. The traverse 15 with vacuum grippers 16 of the laying machine 3 by the power cylinder 14, the rod of which is connected with the traverse 15, is raised to the extreme upper position.

On command from the control panel of the complex, a pneumatic distributor (not shown) of the pneumatic system for supplying air to the cylinder 14 of the laying machine 3 is activated, air enters the upper cavity of the cylinder 14, as a result of which

Downward is the piston with the iHTOKOM of cylinder 14 and the traverse 15 connected to it with vacuum tongs 16. The downward movement of the traverse 15 continues until it is tied with the suction cups of the vacuum tongs 16 of the upper foot blank, laid between the guide pins 18 store 8. At this point, the vacuum clamps 16, triggered the top lock. The pneumatic distributor of the pneumatic system for supplying air to the cylinder 14 of the stacker 3 is again switched on (the pneumatic distributor is triggered by a signal from the sensor controlling the time at which the vacuum grippers operate). Upper cavity

5 of the cylinder 14 is connected to the atmosphere, and air is supplied to the lower one, with the result that the yoke 15 with the vacuum grippers 16 and the sheet stock moves up to the extreme upper position, also controlled by a suitable sensor, which can be mounted, for example, on the yoke traverse 15 3. As soon as the yoke 15 occupies the extreme upper position, the pneumatic distributor of the pneumatic valve 5 of the trolley jaws drive actuator is activated by the signal of this sensor 4. The air enters the lower cavities of two cylinders s 62 installed on the vehicle body. Porsni 79 cylinders with rods 64 are mixed up. Together with the rods 64, they move in the rail guides 68 of the rail 65, which, interacting with the gear wheels 66 mounted on the shafts 67, turn them. When the gears 66 are rotated, the shafts 67 are rotated, mounted for rotation in the brackets 63 associated with the gear body. Together with each shaft 67, two two-arm levers 69 rotate, rigidly connected with shafts 67, and U-shaped brackets 63 mounted between vertical shelves. When rotated, levers 69, i.e., they are connected with one arm to fingers 70

 two shoulders levers 71, and the other pivotally with strips 73, the levers 71 turn counterclockwise around the axes 72 and the horizons 73 move horizontally, as a result of which the levers 74

5 rotates clockwise around the same axis 72, since the bars 73 are hingedly connected to the levers 74. Since the arms of the levers 71 and 74 play the role of jaws of tongs, the arms are clamped towards each other when the levers 71 and 74 rotate towards each other.

0 edges of the sheet blank from two sides, which at this time is held in the extreme upper position by the vacuum clamps 16 of the stacker 3. After the workpiece is grasped by the edge by the tongs of the carriage 4, the sensor signal that senses the moment of the end of the gripper (the sensor can be embedded in one of the grip), the motor 33 for driving the trolley 4 (in all subsequent

trolley travel cycles the motor permanently remains on). At the same time, air is supplied between the piston 49 and the front end of the internal cavity of the cylinder housing of the gear wheel 37 (the force cavity of the cylinder) through a coupling 55 and an axial channel made in the shaft 42. Air is supplied through the pneumatic distributor of the pneumatic drive system of the trolley drive, which is triggered by a signal from the sensor controlling the end of the grip of the sheet. Since the piston 49 is fixed against axial movement along the shaft 42 by the ring 50 (when air is displaced to the left relative to the plane of Fig. 3), the gear wheel 37 is pressed through the friction pad 48 to the gear wheel 35. When the shaft rotates, the electric motor rotates with it The side of the brush is 34, attached to the motor shaft. Since the crust 34 is kinematically connected to the wheel 35, it begins to rotate with it freely around the shaft 42, but in the opposite direction. Together with wheel 35, wheel 37 rotates in the same direction, pressed against it by air through friction lining 48. Wheel 37 rotates with shaft 42, with which it is connected with a tongue 53, in sub-support supports 44. Since the wheel is kinematically connected to the wheel 38, and then, in turn, with the wheel 39, the latter rotates in the same direction as the wheel 35. The wheel 39, like the wheel 37, rotates together with the shaft 43, with which it is associated with a tongue. In the same direction as the shaft 43, the shaft 59 rotates, which is connected to the shaft 43 by means of the coupling 57 and shafts 58. The balls 43 and 59 also rotate in the sub-bearing supports. Gears 61, which are connected to shaft 59 by pins 60, rotate together with shaft 59. Gears 61, which are the wheels of the carriage, roll up guide rails 6 as they rotate, causing the carriage 4 together with the workpiece to move to the stamping area. When the carriage 4 reaches the shtampovka zone, it stops at the signal of the limit switch controlling this position.

The trolley is stopped as follows. The signal of the limit switch switches the pneumatic valve of the pneumatic system of the trolley drive, as a result of which the force cavity of the cylinder body of the wheel 37 is connected to the atmosphere, and the wheel 37 under pressure of the spring 51 returns to its original position and is pressed by the friction pad located on the end of the cover 52 to the end of the sleeve 45. Under the action of friction forces arising on the contact surface between the friction lining on the lid 52 and the end of the sleeve 45 of the trolley body, the wheel 37 stops rotating, the investigator

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however, the gears 38 and 39, which are in kinematic communication with it, cease to rotate. The shaft 43 and the shaft 59, which is connected to the shaft 43 by the clutch 57, are stopped. Consequently, the gears 61 of the carriage cease to rotate. Cart 4 stops. Since the gears 61 roll around the rack guides 6, the possibility of slipping at the time of stopping is eliminated, thereby improving the positioning accuracy of the carriage in the stamping area. The drive shaft motor 33 continues to rotate after the cart stops (the engine is not turned off). Gear 34 and kinematically connected gears 35 and 36 rotate with it and roll freely around shafts 42 and 43. At the signal of the limit switch, which controls the position of the trolley 4, the pneumatic distributor of the jaws of the tongs switches in the area of the stamping carts 4. The lower cavities of the cylinders 62 are connected to the atmosphere, and air is supplied to the upper ones. The pistons of the cylinders 62 with the rods 64 and the laths 65 move downwards. The slats 65 turn the gears 66 and with them the shafts 67 and two shoulders levers 69 counterclockwise. When the levers 69 are rotated, the levers 71 and 74 are rotated about the axis 72 clockwise and counterclockwise, respectively, as they are connected to the levers 69 with fingers 70 and bars 73. The jaws of the grips of the trolley 4 open and the workpiece 11 is reset on the die 30 mounted on the bottom plate 28 of the stamp, which is mounted on the table of the press 1 and fixed on it with the plates 29. On the upper plane of the die, centering pins with a conical feed are provided, with which the blanks 11 are additionally oriented relative to matrix 30. Structurally, the arms of the carriages are designed in such a way that after they have been opened, the lower sponge is in a vertical position, which ensures the free movement of the sheet in the vertical direction downwards at the moment of discharge. After opening the jaws of the grips of the carriage 4, the sensor of the sensor controlling the closing-opening of the jaws turns on the pneumatic distributor of the pneumatic drive system of the carriage and air is fed into the power cavity of the power cylinder of the wheel 39, which is structurally designed like the wheel 37. the side of the gear wheel 36 and is pressed against it through a friction lining provided at the end of the housing, wherein a spring mounted between the piston of the cylinder and the cylinder head is compressed. As the gear wheel 36 rotates continuously, the gear wheel 39 and the shaft 43 begin to rotate with it. When the wheel housing 39 is moved to the side of the wheel 36, it is disengaged from the wheel 38. At the same time, the gear wheel 39 rotates to the side, opposite to the direction of rotation of the wheel 39 at the time of movement of the carriage 4 to the stamping area. In the opposite direction, shaft 59, which is connected to shaft 43 by coupling 57, and the trolley bristles rigidly connected with it, which, rolling the lath guides 6, move the carriage 4 from the punching zone to the leftmost position, begin to rotate. The trolley 4 can be moved from the stamping area at a higher speed than to the stamping area, due to the appropriate selection of the gear ratio of the kinematic chain of movement from the stamping area in the drive of the trolley movement. Approaching the shock absorbers 7, the carriage 4 stops. This is ensured by the signal of the sensor controlling the extreme left position of the carriage (it can be built into the stop shock absorber) that the pneumatic distributor of the pneumatic system of the carriage movement actuator switches, the force cavity of the wheel cylinder 39 is connected by atmosphere, the cylinder body under the action of the spring 51 moves to the right and presses the friction lining on the end of the cylinder cover to the end of the right holder of the lid of the trolley body, in which the shaft bearing 43 is mounted. the shaft 43, the shaft 59 and the driving gears 61 of the carriage cease to rotate with it. Cart 4 stops. As the trolley moves out of the shtampovka zone rapidly, the accumulated energy at the moment of stopping the trolley is absorbed by the shock absorbers 7. As soon as the trolley 4 stops in the leftmost position, the drive of the press of the slide of the press 1 is turned down by a sensor signal controlling this position. The press slide moves downward and with it the working elements of the stamp attached to the slide. Stamping is performed. After the end of the stamping and the return of the slide to the uppermost position, the sensor of the sensor controlling the upper position of the press slide is activated by moving the carriage 5 from the extreme right to the stamping zone. Since the carriage 5 is structurally made the same with the carriage 4, the sequence of switching on and operation of the elements of the carriage 5 is similar to the sequence of switching on and operation of the drive elements of the carriage 4 when it is moved to the stamping area and back. At the signal of the limit switch, the carriage 5 stops in the punching area, the drive of the jaws of the carriage 5 is moved, which seize the clamped product by the edge. The grip of the stamped product is carried out similarly to the described process of gripping the initial billet with the grips of the carriage 4. After the grip of the stamped product is gripped

5, the drive for moving the carriage 5, and it is rapidly moving from the shtampovka zone to the extreme right position, where, having reached the shock absorbers 7, it is located above the tray 9. At a signal from the sensor, the counter. the right-hand position of the trolley, the grippers of the trolley 5 are actuated, they open, causing the stamped product 12 to be dumped into the pallet 9, and a signal is sent to move the trolley 4 with the subsequent sheet preparation in the stamping area. Then the cycle repeats.

The complex is controlled from a unified control system, which, in a defined sequence, issues control commands to the drives of the elements included in the complex according to the enabling signals of the sensors controlling the position of the elements of the complex during its operation.

The invention makes it possible to simplify the structure of an automated complex for stamping large-sized parts, while greatly expanding its technological capabilities, since the proposed system is realizable for automating the loading and unloading of dies with large-sized products with almost unlimited dimensions for presses of any design.

Claims (2)

Invention Formula 5 1. Automated complex for stamping large-sized parts, containing a press having a table, a chip installed on a press table, a device for loading workpieces into a chip and unloading from a stamp, as well as a sheet stacker for 0 the provision of blanks into a device for unloading and unloading, characterized in that, in order to expand technological capabilities, the device for loading and unloading blanks is made in the form of two drives. mounted with the possibility of reciprocating movement relative to the stamp, mounted on the press table on both sides of the die of the rack guide carriages, each trolley is made in the form of a frame with rolling pillars and tongs and is equipped with an electromechanical drive of at least two rolling bearings, clamp clamps are made in the form of a power cylinder having a rod in the form of a rack rail, a gear wheel installed with the possibility 5 interacting with a toothed rack rod connected to a gear wheel shaft mounted with the possibility of rotation, double-arm levers mounted on the shaft. mounted on the frame can be rotated in mutually opposite sides of the clamping levers, with each double-arm lever installed with the ability to interact with one shoulder with one clamping lever. 2. A complex according to claim 1, characterized in that each electromechanical drive for moving each of the carriages is made in the form of an electric motor, a gear mounted on the output shaft of an electric motor mounted rotatably in the frame of the intermediate shaft carriage with a gear wheel rotatable, and a friction clutch connected to the intermediate shaft and installed with the possibility of interaction with the gear wheel of the intermediate shaft, mounted rotatably in the frame of the carriage, shaft with a gear wheel mounted to interact with the toothed wheel of the intermediate shaft and rotation relative to the running shaft of an additional friction clutch connected to the drive shaft and mounted to be able to interact with the toothed wheel of the driving shaft and gears associated with the toothed racks with Thereby, each friction clutch is made in the form of a power cylinder having a piston mounted on each shaft and a spring-loaded housing mounted on the shaft so as to rotate and return of translational movement, and actuators housings clutches each electromechanical actuator kinematically linked to each other. 13 6 1 36 Fig.Z FIG. Type B 76 75 61 Dl 71 1 Compiled by I. Ment Gova Editor O. Yurkovetskaya Tehred I. VeresKorrektor A. Zimokosov Order 2994/7 Circulation 731 Subscription VNIIPI USSR State Committee for Inventions and Discoveries 1 13035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, ul. Project, 4