CN107378348B - Special fixture for welding stamping and welding shoe of drum brake of truck - Google Patents
Special fixture for welding stamping and welding shoe of drum brake of truck Download PDFInfo
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- CN107378348B CN107378348B CN201710759987.9A CN201710759987A CN107378348B CN 107378348 B CN107378348 B CN 107378348B CN 201710759987 A CN201710759987 A CN 201710759987A CN 107378348 B CN107378348 B CN 107378348B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
A clamp special for welding a stamping shoe of a drum brake of a truck is formed by combining a base support part, a pressing plate lever mechanism, a wedge pushing mechanism, a workpiece positioning mechanism and a clamping plate clamping mechanism, wherein the clamping plate clamping mechanism is connected with a pressing plate head (12) of the pressing plate lever mechanism into a whole through a pin shaft connecting seat (13), the pressing plate lever mechanism, the wedge pushing mechanism and the workpiece positioning mechanism are arranged on the base support part, the clamping plate clamping mechanism is arranged at the end part of the pressing plate head (12), a workpiece is placed on a workpiece positioning seat (19), a manual button is operated, a positioning cylinder (16), a pressing plate cylinder (23) and a wedge cylinder (5) are controlled to act sequentially, and the pressing plate lever mechanism, the wedge pushing mechanism, the clamping plate clamping mechanism and the workpiece positioning mechanism are used for clamping a panel workpiece (M) and a web workpiece (F) to be tightly arranged on the workpiece positioning seat (19). Accurate positioning precision, good welding quality and high production efficiency.
Description
Technical Field
The invention relates to a truck brake, in particular to a tool clamp for manufacturing the brake.
Background
The stamping and welding shoe of the drum brake of the truck is an alternative form of casting shoe, the stamping and welding shoe comprises a stamping panel and a stamping web, plug welding and fillet welding can be adopted, cam type butt welding can also be adopted, and the cost of cam type butt welding is too high due to thicker shoe steel plates, so that the stamping and welding shoe cannot be applied in large batches in production, and the stamping and welding shoe can only be replaced by fillet welding. The stamping and welding shoe of the existing truck brake consists of a stamping panel and two stamping webs, wherein a positioning square hole corresponding to the web is stamped on the panel, a rectangular shape is stamped on the web and used for positioning in the circumferential direction during welding, different automobile manufacturers have different requirements, and some manufacturers do not have the positioning square hole to improve the overall strength. At the moment, the technical requirements for welding the panel and the web are higher, the positioning accuracy of the panel and the web needs to be guaranteed during welding, the welding deformation is reduced, and the geometric tolerance requirement after welding is strictly guaranteed. How to achieve high-precision welding quality, a special fixture is needed to accurately position the impact welding shoe of the automobile brake, which is a main method for solving the problem and is the research direction of various brake manufacturers.
Disclosure of Invention
The invention aims to provide the special fixture for the impact welding of the shoe of the automobile drum brake, which has reasonable structure and convenient use, has accurate positioning precision, ensures welding quality and good matching effect, can meet the clamping requirement of the impact welding shoe welding, improves the production efficiency, ensures the overall performance of the automobile brake and improves the economic and social benefits.
The task of the invention is accomplished in the following way: the special clamp for welding the impact welding shoe of the truck drum brake is formed by combining a base supporting part, a pressing plate lever mechanism, a wedge pushing mechanism, a workpiece positioning mechanism and a clamping plate clamping mechanism, wherein the base supporting part comprises a base, a positioning bottom plate and a positioning bottom plate upright post, the pressing plate lever mechanism comprises a pressing plate cylinder, a pressing plate and a pressing plate upright post, the wedge pushing mechanism comprises a wedge cylinder, a connecting rod joint, a connecting rod and a wedge, the workpiece positioning mechanism comprises a positioning cylinder, a guide sleeve, a positioning sliding block, a panel positioning long plate and a workpiece positioning seat, the clamping plate clamping mechanism comprises a clamping plate, a tension spring, a clamping plate pin shaft, a wedge cushion block and a pin shaft connecting seat, the clamping plate clamping mechanism is connected with a pressing plate head of the pressing plate lever mechanism into a whole through the pin shaft connecting seat, the pressing plate lever mechanism, the wedge pushing mechanism and the workpiece positioning mechanism are arranged on the base supporting part, the clamping plate head end of the pressing plate lever mechanism, a brake impact welding shoe workpiece is placed on the workpiece positioning seat, and manual buttons are controlled to respectively press the positioning cylinder, the pressing plate cylinder and the wedge cylinder in sequence, the wedge pushing mechanism, the clamping plate pressing plate mechanism and the workpiece positioning mechanism and the workpiece clamping plate are pressed on the workpiece positioning shoe seat. The base of the base supporting component is a long rectangular thick steel plate and is positioned at the bottom of the invention, a plurality of upright bottom plate upright posts are arranged on the base, the top of each bottom plate upright post supports a positioning bottom plate, the positioning bottom plate is a long rectangular thick steel plate smaller than the base, and the pressing plate lever mechanism, the clamping plate clamping mechanism and the workpiece positioning mechanism are arranged on the positioning bottom plate. The clamp plate cylinder of clamp plate lever mechanism sets up the rear end at base supporting mechanism, the clamp plate cylinder seat is fixed on the base, the slope setting is erect to the upper back to the clamp plate cylinder, the piston rod of clamp plate cylinder connects the rear end of round pin axle hookup clamp plate through piston rod joint and clamp plate, the clamp plate stand sets up on the locating baseplate, the below that the clamp plate middle part is the back, the clamp plate sets up on the clamp plate stand top, the clamp plate passes through the round pin axle and is connected with the clamp plate stand, the clamp plate can rotate the swing around the round pin axle, the clamp plate rear end connects the piston rod of clamp plate cylinder through clamp plate hookup pin axle and piston rod joint, the front end of clamp plate is equipped with the clamp plate head, clamp plate head and clamp plate clamping mechanism cooperation installation. The wedge pushing mechanism comprises a wedge cylinder, a wedge cylinder seat, a connecting rod connector, a connecting rod and a wedge, wherein the wedge cylinder is connected with the wedge cylinder seat and arranged on the top surface of the pressing plate; when the piston rod of the wedge cylinder is retracted backwards, the wedge is pulled to retract in the space at the inner edge of the clamping plate, and the clamping plate loosens the web plate workpiece. The workpiece positioning seat of the workpiece positioning mechanism is fixedly arranged on the plane of the positioning bottom plate, the rear end face of the workpiece positioning seat is abutted against the pressing plate upright post, the upper part of the workpiece positioning seat is in an inward concave arc shape, the panel workpiece is placed on the workpiece positioning seat, the positioning cylinder is fixedly arranged at the front end of the positioning bottom plate through the positioning cylinder seat, the end part of a piston rod of the positioning cylinder is connected with the positioning slide block, the positioning slide block is movably assembled in the guide sleeve, the piston rod is abutted against the positioning slide block to slide upwards to extend out of the guide sleeve, the positioning slide block slides to the maximum stroke position of the piston rod, the front end of the web workpiece is abutted against the positioning slide block, the positioning shaft is arranged in the positioning shaft sleeve at the upper part of the pressing plate upright post, the outer end faces at two sides of the positioning shaft sleeve are respectively provided with the inner base plate and the base plate baffle plate, the thickness of the inner base plate is the same as that of the web workpiece, the area of the inner base plate is smaller than the base plate baffle plate, the lower ends of the inner base plate at two sides of the positioning shaft sleeve, the base plate baffle plate and the outer end faces of the positioning shaft sleeve are fixedly arranged at the two sides of the pressing plate upright post, the rear ends of the web workpiece are respectively embedded in the pressing space, the front ends of the web workpiece are abutted against the positioning slide block, the clamping mechanism clamps the front ends of the web workpiece, and the web workpiece are tightly pressed on the lower panel workpiece. The clamping plate of the clamping plate clamping mechanism is a left long thick steel plate and a right long thick steel plate, two tension spring screws are respectively arranged at the tops of the two clamping plates, two tension springs are arranged on the tension spring screws to connect the tops of the two clamping plates, the upper sections of the two clamping plates are respectively provided with an inward opening through hole groove, the wedge cushion block is two rectangular blocks with connecting handles, the heads of the connecting handles are cylindrical and sleeved in the through hole grooves of the upper sections of the clamping plates, the wedge is inserted into a space between the wedge cushion blocks at two sides, the wedge cushion blocks are pushed to swing, the heads of the connecting handles of the wedge cushion blocks can correspondingly rotate in the through hole grooves, wedge cushion block baffles are arranged at the end surfaces of the through hole grooves, the connecting handle heads of the wedge cushion blocks sleeved in the through hole grooves are sealed in the through hole grooves, the outer end surfaces of the wedge cushion blocks are sealed in the through hole grooves, pin holes are formed in the lower sections of the two clamping plates, pin shafts are matched with pin shafts of the clamping plates, two ends of the pin shafts extend out of the pin shaft holes, pin shaft connecting seats are sleeved on the pin shaft connecting seats, the pin shaft connecting seats are sleeved, the pin shaft connecting shafts are sleeved on the pin shaft connecting shafts are sleeved, the pin shaft connecting seats are fixed on the pressing plate heads, the wedge cushion blocks push the wedge cushion blocks to extend forwards, the wedge cushion blocks extend towards the two sides of the upper sides of the clamping plates, the connecting rods extend to the two sides of the clamping plates, and stretch the wedge cushion blocks, and extend towards the two sides of the upper sides of the clamping plates, and swing shafts, and the two sides of the clamping plates are stretched out of the upper ends of the clamping plates, and rotate.
When the pneumatic positioning device is in practical application, the pneumatic positioning device works in cooperation with a pneumatic system, a panel workpiece is placed on a workpiece positioning seat for positioning, two web workpieces are placed on the panel workpiece, a button of a positioning cylinder is started, a piston rod of the positioning cylinder extends out, a positioning sliding block in a guide sleeve is ejected obliquely upwards, one ends of the two web workpieces are tightly attached to an outer cambered surface of the positioning sliding block, and the web workpieces are tightly attached to an inner cambered surface of the panel workpiece; the press plate cylinder button is started, a piston rod of the press plate cylinder extends out, the rear end of the press plate is pushed upwards to drive the press plate lever mechanism to act, the press plate swings around a central pin shaft of a press plate upright post, a press plate head at the front end of the press plate is pressed downwards, a clamping plate of a clamping plate clamping mechanism connected with the press plate head clamps the front end parts of two web workpieces, the wedge cylinder button is started, the piston rod of the wedge cylinder extends forwards and is connected with a wedge through a connecting rod to push the wedge forwards, the wedge is inserted into a space between two wedge cushion blocks at the inner side of the clamping plate to extrude the wedge cushion block, the clamping plate swings around a clamping plate pin shaft, a tension spring at the top of the clamping plate is pulled open, the upper part of the clamping plate is pulled outwards, the lower end of the clamping plate is pushed towards the middle to clamp the web workpieces, the two web workpieces are tightly attached to the positioning slide block, and simultaneously the press plate head presses down the web workpieces tightly on the panel workpieces. The clamping operation of the jig is ended, and welding is started. After the welding is finished, the button is started to enable the piston rod of the wedge cylinder to retract, the wedge is driven to retract through the connecting rod, the wedge cushion block swings along with the piston rod, the upper end of the clamping plate is tensioned by the tension spring, and the clamping plate rotates around the pin shaft of the clamping plate to reset; starting a press plate cylinder button, retracting a piston rod of the press plate cylinder, pulling the rear end of the press plate to sink, and driving a clamp plate clamping mechanism to lift by a press plate head at the front end of the press plate; and starting a positioning cylinder button, retracting a piston rod of the positioning cylinder, and pulling the positioning sliding block back into the guide sleeve to separate from the web workpiece. At the moment, the welded brake shoe workpieces can be taken out, and the welding process of one brake shoe workpiece is finished; and then a new panel workpiece and a new web workpiece are put in to perform the welding procedure of the brake shoe workpiece of the next cycle.
According to the technical scheme, the design structure is simple and reasonable, the use is safe and convenient, the workpiece placement is easy, the positioning accuracy is accurate, the welded workpiece is convenient to take down, the matching effect is good, the overall performance of the automobile brake is ensured, the requirement of welding the impact welding shoe can be met, the welding quality is ensured, the production efficiency is improved, and the preset purpose is better achieved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a top view from A of FIG. 1;
FIG. 3 is a view in the B direction of FIG. 1;
FIG. 4 is an isometric view of FIG. 1;
FIG. 5 is an isometric combined view of the placement workpiece of FIG. 4;
FIG. 6 is a schematic view of the clamping plate clamping mechanism of the present invention;
FIG. 7 is a view in the direction C of FIG. 6;
fig. 8 is a schematic structural view of the platen column 1 in fig. 1;
FIG. 9 is an E-direction view of FIG. 8;
fig. 10 is an isometric view of the platen column 1;
fig. 11 is a schematic structural view of the platen 2 in fig. 1;
FIG. 12 is a schematic view of the platen head 12 of FIG. 11 in the K-direction;
fig. 13 is an N-directional plan view of fig. 11.
In the figure, a 1-pressing plate upright post, a 2-pressing plate, a 3-wedge cylinder seat, a 4-center pin shaft, a 5-wedge cylinder, a 6-connecting rod joint, a 7-connecting rod, an 8-wedge, a 9-tension spring screw, a 10-tension spring, an 11-wedge cushion block baffle, a 12-pressing plate head, a 13-pin shaft connecting seat, a 14-clamping plate, a 15-guide sleeve, a 16-positioning cylinder, a 17-positioning cylinder seat, a 18-bottom plate upright post, a 19-workpiece positioning seat, a 20-base, a 21-positioning bottom plate, a 22-pressing plate cylinder seat, a 23-pressing plate cylinder, a 24-panel positioning reference block, a 25-panel positioning long plate, a 26-connecting seat screw, a 27-clamping plate pin shaft, a 28-wedge cushion block, a 29-backing plate connecting pin and a 30-positioning shaft; a-view direction symbol, B-view direction symbol, C-view direction symbol, D-positioning slide block, E-view direction symbol, F-web workpiece, G-H-piston rod, J-piston rod joint, K-view direction symbol, L-fastening screw, M-panel workpiece, N-view direction symbol, P-backing plate baffle, Q-crack space, R-inner backing plate, S-pressing plate head cavity, T-bottom insert plate, U-positioning shaft sleeve, X-pressing plate connecting pin shaft and Z-cylinder mounting groove.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings.
Referring to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the invention is formed by combining a base supporting part, a pressing plate lever mechanism, a wedge pushing mechanism, a workpiece positioning mechanism and a clamping plate clamping mechanism, wherein the base supporting part comprises a base 20, a positioning bottom plate 20 and a bottom plate upright 18, the pressing plate lever mechanism comprises a pressing plate upright 1, a pressing plate 2 and a pressing plate cylinder 23, the wedge pushing mechanism comprises a wedge cylinder 5, a connecting rod joint 6, a connecting rod 7 and a wedge 8, the workpiece positioning mechanism comprises a positioning cylinder 16, a guide sleeve 15, a positioning sliding block D, a panel positioning long plate 25 and a workpiece positioning seat 19, the clamping plate clamping mechanism comprises a clamping plate 14, a tension spring 10, a clamping plate pin 27, a wedge cushion block 28 and a pin connecting seat 13, the clamping plate clamping mechanism is connected with a pressing plate head 12 of the pressing plate lever mechanism into a whole through the pin connecting seat 13, the pressing plate lever mechanism, the wedge pushing mechanism and the workpiece positioning mechanism are arranged on the base supporting part, the clamping plate mechanism is arranged at the end of the pressing plate lever mechanism, a brake punch shoe workpiece is arranged on the workpiece positioning seat 19, and a manual control button is used for respectively controlling the positioning cylinder 16, the pressing plate 23, the wedge pushing mechanism, the wedge pressing plate 5, the clamping mechanism and the workpiece pressing plate and the workpiece clamping mechanism are arranged on the workpiece positioning seat 19 in sequence, and the clamping plate is pressed by the clamping mechanism and the clamping plate and the workpiece pressing plate. The base 20 of the base supporting component is a long rectangular thick steel plate and is positioned at the bottom of the whole fixture, a plurality of upright bottom plate upright posts 18 are arranged on the base 20, the top of the bottom plate upright posts 18 supports a positioning bottom plate 21, the positioning bottom plate 21 is a long rectangular thick steel plate with the area smaller than that of the base 20, and a pressing plate lever mechanism, a clamping plate clamping mechanism and a workpiece positioning mechanism are arranged on the positioning bottom plate 21. The clamp plate cylinder 23 of clamp plate lever mechanism sets up in the rear end of base supporting mechanism, clamp plate cylinder block 22 is fixed on base 20, the slope sets up to the upper back, clamp plate cylinder 23's piston rod H connects the rear end of clamp plate 2 through piston rod joint J and clamp plate hookup round pin axle X, clamp plate stand 1 sets up on locating bottom plate 21, the below behind the clamp plate 2 middle part, clamp plate 2 sets up on clamp plate stand 1 top, clamp plate 2 passes through round pin axle 4 and is connected with clamp plate stand 1, clamp plate 2 can swing around round pin axle 4, clamp plate 2 rear end connects the piston rod H of clamp plate cylinder 23 through clamp plate hookup round pin axle X and piston rod joint J, the front end of clamp plate 2 is equipped with clamp plate head 12, clamp plate head 12 and clamp plate clamping mechanism cooperation installation. The wedge pushing mechanism comprises a wedge cylinder 5, a connecting rod connector 6, a connecting rod 7 and a wedge 8, wherein the wedge cylinder 5 is connected with a wedge cylinder seat 3 and is arranged on the top surface of the pressing plate 2, the end part of a piston rod H of the wedge cylinder 5 is connected with the connecting rod 7 through the connecting rod connector 6, the front end of the connecting rod 7 is connected with the wedge 8, the wedge 8 is inserted into the upper space of the inner side of the pressing plate 2, when the piston rod H of the wedge cylinder 5 extends forwards, the wedge 8 is pushed to be inserted into the space of the inner side of the pressing plate 2 through the connecting rod connector 6 and the connecting rod 7, and the lower end of the pressing plate 2 clamps the end part of a web workpiece F; when the piston rod H of the wedge cylinder 5 retreats backwards, the wedge 8 is pulled to retreat in the space on the inner side of the clamping plate 2, and the web workpiece F is loosened at the lower end of the clamping plate 2. The workpiece positioning seat 19 of the workpiece positioning mechanism is fixedly arranged on the plane of the positioning bottom plate 21, the rear end face of the workpiece positioning seat 19 is abutted against the pressing plate upright post 1, the upper part of the workpiece positioning seat 19 is in an inward concave arc shape, a panel workpiece M is placed on the workpiece positioning seat 19, the positioning cylinder 16 is fixedly arranged at the front end of the positioning bottom plate 21 through the positioning cylinder seat 17, the end part of a piston rod H of the positioning cylinder 21 is connected with the positioning slide block D, the positioning slide block D is movably assembled in the guide sleeve 15, the piston rod H pushes the positioning slide block D to upwards slide and stretches out of the guide sleeve 15, the positioning slide block D slides to the maximum stroke position of the piston rod H and is fixed, the front end of a web workpiece F is abutted against the positioning slide block D, the positioning shaft 30 is arranged in the positioning shaft sleeve U at the upper part of the pressing plate upright post 1, the outer end faces at two sides of the positioning shaft sleeve U are assembled with the inner base plates R and the base plates P, the thickness of the inner base plates R is identical to the thickness of the web workpiece F, the area of the inner base plates R is smaller than the base plate baffle P, the lower ends of the inner base plates R at the two sides of the positioning shaft sleeve U, the two sides of the web plates P and the outer end faces of the positioning shaft sleeve U are movably assembled in the guide sleeve 15, the clamping space Q is formed at the two sides of the pressing plate F, the web plate F is clamped tightly clamped by the rear ends of the web plate F is clamped tightly pressed against the front end of the upper plate 2, and the front end of the pressing plate F is clamped tightly pressed against the upper plate.
Referring to fig. 6 and 7, the clamping plate 2 of the clamping plate clamping mechanism is a left long thick steel plate and a right long thick steel plate, two tension spring screws 9 are respectively arranged at the tops of the clamping plates 2 at two sides, two tension springs 10 are arranged on the tension spring screws 9 to be connected with the tops of the clamping plates 2 at two sides, through-hole grooves which are opened inwards are respectively arranged at the upper sections of the clamping plates 2, the wedge cushion block 28 is two rectangular blocks with connecting handles, the heads of the connecting handles are cylindrical and sleeved in the through-hole grooves of the upper sections of the clamping plates 2, the wedge 8 is inserted into the space between the wedge cushion blocks 28 at two sides, the wedge cushion block 28 is pushed to swing, the connecting handle heads of the wedge cushion block 28 can correspondingly rotate in the through-hole grooves, wedge cushion block baffles P are arranged at the end faces of the through-hole grooves, the wedge cushion blocks P are fixed at the outer end faces of the two side clamping plates 2 by fastening screws L, openings of the through-hole grooves are sealed, the connecting handle heads of the wedge cushion blocks 28 sleeved in the through-hole grooves are sealed in the through-hole grooves, the lower sections of the two side clamping plates 2 are provided with pin shaft holes, the pin shafts 27 are sleeved outside the pin shaft holes 27, the two ends of the pin shafts 27 extend out of the pin shafts, the connecting rods 13 are sleeved with the pin holes, the connecting rods 13 are sleeved with the connecting rods and the wedge cushion blocks are stretched out of the upper end plates 10 and extend towards the two sides of the upper end plates 2, and the piston rod plates 2 are stretched towards the upper end faces of the piston rod 2, and the piston rod 2 is stretched towards the piston rod 2, and the end faces of the piston rod 2 is stretched towards the piston rod 2 is stretched and stretched towards the piston rod end faces, and the piston rod 2 is stretched towards the piston rod and is stretched towards the piston rod 13.
Referring to fig. 8, 9 and 10, the pressing plate upright post 1 is inserted into a mounting hole formed in the positioning bottom plate 21 through the bottom plugboard T, the wedge air cylinder 5 is mounted in cooperation with an air cylinder mounting groove on the pressing plate 2, and the wedge cushion block 28 of the clamping plate clamping mechanism is blocked in the pressing plate head cavity Q on the pressing plate head 12. The locating shaft sleeve U at the upper part of the pressing plate upright post 1 is internally provided with a locating shaft 30, the outer end surfaces at two sides of the locating shaft sleeve U are provided with an inner base plate R and a base plate baffle P, the thickness of the inner base plate R is the same as that of the web workpiece F, the area of the inner base plate R is smaller than that of the base plate baffle P, a gap space Q is formed at two sides of the pressing plate upright post 1 between the lower end of the inner base plate R at two sides of the locating shaft sleeve U, the base plate baffle P and the outer end surface of the locating shaft sleeve U, and the rear ends of the two web workpieces F are respectively embedded in the gap space Q.
Referring to fig. 11, 12 and 13, a pressing plate 2 is arranged at the top end of a pressing plate upright 1, the pressing plate 2 is connected with the pressing plate upright 1 through a central pin shaft 4, the pressing plate 2 can swing around the central pin shaft 4, the rear end of the pressing plate 2 is connected with a piston rod H of a pressing plate cylinder 23 through a pressing plate connecting pin shaft X and a piston rod joint J, a pressing plate head 12 is arranged at the front end of the pressing plate 2, and the pressing plate head 12 is installed in cooperation with a clamping plate clamping mechanism. The cylinder mounting groove Z on the pressing plate 2 is matched with the wedge cylinder 5, and the pressing plate head 12 keeps the wedge cushion block 28 of the clamping plate clamping mechanism in the pressing plate head cavity Q.
In practical application, the invention works in cooperation with a pneumatic system, one side of a workpiece positioning seat 1 is provided with a panel positioning reference block 25, a panel workpiece M is placed on a workpiece positioning seat 19 for positioning, two web workpieces F are placed on the panel workpiece M, a button of a positioning cylinder 16 is started, a piston rod H of the positioning cylinder 16 extends out, a positioning slide block D in a guide sleeve 15 is ejected obliquely upwards, the front ends of the two web workpieces F are tightly attached to the positioning slide block D, and the extrados surfaces of the web workpieces F are tightly attached to the intrados of the panel workpiece M; the press plate cylinder 23 button is started, the piston rod H of the press plate cylinder 23 stretches out, the rear end of the press plate 2 is pushed upwards, the press plate lever mechanism is driven to act, the press plate 2 swings around the central pin shaft 4 of the press plate upright post 1, the press plate head 12 at the front end of the press plate 2 is pressed down, the clamp plate 14 of the clamp plate clamping mechanism connected with the press plate head 12 clamps the front end parts of two web workpieces F, the button of the wedge cylinder 5 is started, the piston rod H of the wedge cylinder 5 stretches out forwards, the wedge 8 is connected with the connecting rod 7 to push forwards, the wedge 8 is inserted into the space between the two wedge cushion blocks 28 at the inner side of the clamp plate 2, the wedge cushion blocks 28 are extruded, the clamp plate 2 swings around the clamp plate pin shaft 27, the tension spring 10 at the top of the clamp plate 2 is pulled open, the upper part of the clamp plate 2 is outwards stretched, the lower end of the clamp plate 2 is pushed to clamp the web workpieces F towards the middle, the two web workpieces F are tightly attached to the positioning slide block D, and simultaneously the press plate head 12 presses the web workpieces F tightly onto the panel workpieces M. The clamping operation of the jig is ended, and welding is started. After the welding is finished, the buttons of the wedge cylinder 5 are sequentially started, the piston rod H of the wedge cylinder 5 is retracted, the wedge 8 is driven to retract through the connecting rod 7, the wedge cushion block 28 swings and rotates along with the retraction, the upper end of the clamping plate 2 is tensioned by the tension spring 10, and the clamping plate 2 rotates around the clamping plate pin shaft 27 to reset; starting a button of a pressing plate cylinder 23, wherein a piston rod H of the pressing plate cylinder 23 falls back, pulling the rear end of the pressing plate 2 to sink, and driving a clamping plate clamping mechanism to lift by a pressing plate head 12 at the front end of the pressing plate 2; the button of the positioning cylinder 16 is started, the piston rod H of the positioning cylinder 16 is retracted, the positioning slide block D is pulled back into the guide sleeve 15, and the web workpiece F is separated. At the moment, the welded brake shoe workpiece can be taken out, and one welding procedure is finished; then, a new panel workpiece M and a new web workpiece F are put in, and the next cycle of welding process is performed.
The invention can meet the fixed clamping requirement of the welding of the impact welding shoe, has the advantages of quick workpiece placement, convenient workpiece removal, accurate positioning precision, good welding quality and high production efficiency.
Claims (6)
1. The special clamp for welding the impact welding shoe of the drum brake of the truck is characterized by being formed by combining a base support part, a pressing plate lever mechanism, an inclined wedge propelling mechanism, a workpiece positioning mechanism and a clamping plate clamping mechanism, wherein the base support part comprises a base (20), a positioning base plate (21) and a base plate upright post (18), the pressing plate lever mechanism comprises a pressing plate upright post (1), a pressing plate (2) and a pressing plate cylinder (23), the inclined wedge propelling mechanism comprises an inclined wedge cylinder (5), a connecting rod joint (6), a connecting rod (7) and an inclined wedge (8), the workpiece positioning mechanism comprises a positioning cylinder (16), a guide sleeve (15), a positioning slide block (D), a panel positioning long plate (25) and a workpiece positioning seat (19), the clamping mechanism comprises a clamping plate (14), a tension spring (10), a clamping plate pin (27) and an inclined wedge cushion block (28) and a pin connecting seat (13), the clamping plate clamping mechanism is connected with a pressing plate head (12) of the pressing plate lever mechanism into a whole through the pin connecting seat (13), the pressing plate lever mechanism, the inclined wedge propelling mechanism and the workpiece positioning mechanism are arranged on the base support part, the clamping plate mechanism is arranged at the end of the pressing plate head (12), a brake workpiece is placed on the workpiece positioning cylinder (16) and a control cylinder (23) is controlled to sequentially and operated to move in sequence, the pressing plate lever mechanism, the inclined wedge pushing mechanism, the clamping plate clamping mechanism and the workpiece positioning mechanism cooperate to clamp and tightly press the panel workpiece (M) and the web workpiece (F) of the brake impact welding shoe on the workpiece positioning seat (19).
2. The special clamp for welding the stamping and welding horseshoes of the drum brake of the truck according to claim 1, which is characterized in that a base (20) of the base supporting component is a long rectangular thick steel plate and is positioned at the bottom of the whole clamp, a plurality of upright bottom plate stand columns (18) are arranged on the base (20), a positioning bottom plate (21) is supported at the top of the bottom plate stand columns (18), the positioning bottom plate (21) is a long rectangular thick steel plate with the area smaller than that of the base (20), and a pressing plate lever mechanism, a clamping plate clamping mechanism and a workpiece positioning mechanism are arranged on the positioning bottom plate (21).
3. The special clamp for welding the impact welding shoe of the truck drum brake according to claim 1, characterized in that a pressing plate cylinder (23) of the pressing plate lever mechanism is arranged at the rear end of the base supporting mechanism, a pressing plate cylinder seat (22) is fixedly arranged on the base (20), the pressing plate cylinder (23) is vertically arranged in a tilting mode backwards and upwards, a piston rod (H) of the pressing plate cylinder (23) is connected with the rear end of the pressing plate (2) through a piston rod joint (J) and a pressing plate connecting pin (X), a pressing plate upright post (1) is arranged above the positioning bottom plate (21) and below the pressing plate (2), the pressing plate (2) is arranged at the top end of the pressing plate upright post (1), the pressing plate (2) is connected with the pressing plate upright post (1) through a center pin (4), the rear end of the pressing plate (2) can swing around the center pin (4), the piston rod (H) of the pressing plate connecting pin (X) and the piston rod joint (J) are connected with the pressing plate cylinder (23), and the front end of the pressing plate (2) is provided with a pressing plate head (12) with a pressing plate head cavity (Q) and is installed in a matched mode with the clamping mechanism.
4. The special clamp for welding the impact welding shoe of the truck drum brake according to claim 1, which is characterized in that the wedge pushing mechanism comprises a wedge cylinder (5), a connecting rod connector (6), a connecting rod (7) and a wedge (8), wherein the wedge cylinder (5) is connected with a wedge cylinder seat (3) and is arranged above the top surface of a pressing plate (2), the end part of a piston rod (H) of the wedge cylinder (5) is connected with the connecting rod (7) through the connecting rod connector (6), the front end of the connecting rod (7) is connected with the wedge (8), the wedge (8) is inserted and embedded in the upper space of the inner edge of the clamping plate (2), and when the piston rod (H) of the wedge cylinder (5) extends forwards, the wedge (8) is pushed to be inserted into the space of the inner edge of the clamping plate (2) through the connecting rod connector (6) and the connecting rod (7), and the lower end of the clamping plate (2) clamps the end part of a web workpiece (F); when the piston rod (H) of the wedge cylinder (5) retreats, the wedge (8) is pulled to retreat in the space at the inner edge of the clamping plate (2), and the clamping plate (2) loosens the web workpiece (F).
5. The special fixture for welding the impact welding shoe of the truck drum brake according to claim 1, characterized in that a workpiece positioning seat (19) of the workpiece positioning mechanism is fixedly arranged on the plane of a positioning bottom plate (21), one side of the positioning bottom plate (21) is provided with a panel reference positioning block (24), the rear end surface of the workpiece positioning seat (19) is closely contacted with a panel positioning long plate (25) arranged in front of a pressing plate upright post (1), the upper part of the workpiece positioning seat (19) is in an inward concave arc shape, a panel workpiece (M) is placed on the workpiece positioning seat (19), a positioning cylinder (16) is fixedly arranged at the front end of the positioning bottom plate (21) through a positioning cylinder seat (17), the end part of a piston rod (H) of the positioning cylinder (21) is connected with a positioning sliding block (D), the positioning sliding block (D) is movably assembled in a guide sleeve (15), the piston rod (H) is propped up to move the positioning sliding block (D) upwards, the positioning sliding guide sleeve (15) slides to the maximum stroke position of the piston rod (H), the front end of a web (F) is closely contacted with the positioning sliding block (D), the upper end of the pressing plate (1) is positioned on the positioning block (U) and two bearing blocks (U) are respectively installed in positioning shaft sleeve (U) and two bearing sleeve (U) bearing blocks (R) respectively, the thickness of the inner backing plate (R) is the same as that of the web workpiece (F), the area of the inner backing plate (R) is smaller than that of the backing plate baffle plate (P), a gap space (Q) is formed between the lower ends of the inner backing plates (R) on two sides of the positioning shaft sleeve (U), the backing plate baffle plate (P) and the outer end face of the positioning shaft sleeve (U) on two sides of the pressing plate upright post (1), the rear ends of the two web workpieces (F) are respectively embedded in the gap space (Q), the front ends of the web workpieces (F) are abutted against the positioning sliding blocks (D), and the front ends of the web workpieces (F) are clamped by the clamping plates (2) of the clamping plate clamping mechanism and are tightly pressed on the lower panel workpieces (M).
6. The special clamp for welding impact welding of the brake shoe of the truck drum brake according to claim 1, which is characterized in that the clamping plate (2) of the clamping plate clamping mechanism is a left thick steel plate and a right thick steel plate, two tension spring screws (9) are respectively arranged at the top of the two side clamping plates (2), two tension springs (10) are arranged on the tension spring screws (9) to be connected with the top of the two side clamping plates (2), through hole grooves which are opened inwards are respectively arranged at the upper section of the clamping plates (2), wedge cushion blocks (28) are two rectangular blocks with connecting handles, the heads of the connecting handles are cylindrical and sleeved in the through hole grooves of the upper section of the clamping plates (2), wedges (8) are inserted into the space between the two side wedge cushion blocks (28) to push the wedge cushion blocks (28) to swing, the connecting handle heads of the wedge cushion blocks (28) can correspondingly rotate in the through hole grooves, wedge cushion block baffle plates (P) are arranged on the end faces of the through hole grooves, the fastening screws (L) fix the wedge cushion block baffle plates (P) on the outer end faces of the two side clamping plates (2), openings of the through hole grooves are sealed, the wedge cushion block cushion blocks (28) are sleeved in the through hole grooves, the connecting pins (27) are sleeved outside the pin shafts (13) of the pin shafts are sleeved in the pin shaft holes (2), the pin shafts (13) are sleeved outside the pin shaft holes (27), the pin shaft connecting seat (13) is fixed on the pressing plate head (12) by the assembling connecting seat screw (26), when the piston rod (H) of the wedge cylinder (5) extends forwards, the connecting rod (7) pushes the wedge (8) to be inserted into the space between the two wedge cushion blocks (28) on the inner side of the clamping plate (2), the wedge cushion blocks (28) are pushed to prop towards two sides, the upper end of the clamping plate (2) is propped against two sides, the tension spring (10) on the top of the clamping plate (2) is lengthened, the clamping plate (2) swings around the clamping plate pin shaft (27), the lower end of the clamping plate (2) swings towards the middle, and the end part of the web workpiece (M) is clamped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710759987.9A CN107378348B (en) | 2017-08-30 | 2017-08-30 | Special fixture for welding stamping and welding shoe of drum brake of truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710759987.9A CN107378348B (en) | 2017-08-30 | 2017-08-30 | Special fixture for welding stamping and welding shoe of drum brake of truck |
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| Publication Number | Publication Date |
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| CN107378348A CN107378348A (en) | 2017-11-24 |
| CN107378348B true CN107378348B (en) | 2023-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710759987.9A Active CN107378348B (en) | 2017-08-30 | 2017-08-30 | Special fixture for welding stamping and welding shoe of drum brake of truck |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109839070B (en) * | 2017-11-27 | 2020-10-23 | 上海华银电器有限公司 | Brake air gap detection device |
| CN107866654B (en) * | 2017-12-25 | 2023-10-13 | 山东力得制动科技有限公司 | Plug welding hole welding device for automobile brake impact welding shoe |
| CN108907440B (en) * | 2018-09-26 | 2024-04-26 | 山东力得汽车科技股份有限公司 | Combined clamp for welding sleeve and reinforcing pin on impact welding shoe panel |
| CN109249171B (en) * | 2018-11-19 | 2023-09-15 | 广东富华重工制造有限公司 | Brake shoe welding jig |
| CN110948267A (en) * | 2019-11-30 | 2020-04-03 | 山东力得汽车科技股份有限公司 | Machining center machining clamp for automobile brake shoe |
| CN111421273B (en) * | 2020-04-12 | 2021-11-05 | 嘉兴沃瑞科技有限公司 | Workpiece machining positioning static clamping mechanism for welding equipment |
| CN114473331B (en) * | 2021-11-17 | 2024-05-31 | 宁波甬赢智能设备有限公司 | Welding clamping device for heavy truck impact welding shoe |
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| CN107378348A (en) | 2017-11-24 |
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