CN113966259A

CN113966259A - Clamping device for automatic welding of bumper

Info

Publication number: CN113966259A
Application number: CN201980097106.9A
Authority: CN
Inventors: 徐楠华; 李长伟; 王小满
Original assignee: Nanjing Yingnigema Industrial Automation Technology Co ltd
Current assignee: Nanjing Yingnigema Industrial Automation Technology Co ltd
Priority date: 2019-06-03
Filing date: 2019-10-23
Publication date: 2022-01-21
Anticipated expiration: 2039-10-23
Also published as: WO2020244125A1; CN110142549A; CN113966259B

Abstract

A clamping device for automatic welding of a bumper. Comprises an underframe (1), an energy absorption box clamping mechanism (4) and a main beam pressing mechanism are arranged on the upper side of the underframe (1), the energy absorption box clamping mechanism (4) comprises two groups, and the energy absorption box clamping mechanisms are respectively arranged on two sides of the underframe (1), the main beam pressing mechanism comprises a pressing mechanism and a lateral pressing mechanism (3), the pressing mechanism comprises a support frame (21) arranged on the upper side of the underframe (1) and a jacking assembly arranged on the rear side of the support frame (21), the jacking assembly is connected with a pressing beam (22) and used for adjusting the pressing beam (22) to move up and down, the pressing beam (22) is relatively arranged on two sides of the jacking assembly, the pressing beam (22) is provided with a main beam pressing assembly used for pressing a main beam on the upper side of the energy absorption box, the lateral pressing mechanism (3) comprises a plurality of lateral pressing cylinders (31) fixed on the upper side of the underframe (1), the lateral pressing cylinders (31) are connected with lateral pressing blocks (32), and lateral pressing blocks (32) are relatively provided with main beam limiting blocks (33), the side pressure cylinder (31) presses the main beam between the side pressing block (32) and the main beam limiting block (33). The device can make automatic weld seam one shot forming, improves welding operation's reliability to improve work production efficiency.

Description

Clamping device for automatic welding of bumper

Technical Field

The invention relates to the field of automatic welding of bumpers, in particular to a clamping device for automatic welding of bumpers.

Background

With the development of the automobile industry, automobile bumpers have also been moving to the way of innovation as an important safety device. Today's automobile front and rear bumpers not only keep original protection function, but also pursue harmony and unity with the automobile body modeling, pursue the lightweight of itself. Since the automobile bumper can absorb and relieve external impact force to protect the automobile body and passengers, the quality of the bumper is very important, and the welding quality is the most important. The traditional bumper welding is difficult to realize the stability and controllability of quality due to the influences of manual welding speed, wire feeding speed, welding posture and the like; in addition, the labor efficiency of workers is low, the labor intensity is high, the requirement on the operation of the workers is high, and the cost control of enterprises and the like are not facilitated.

Technical problem

The invention aims to provide a clamping device for automatic welding of a bumper, aiming at the defects in the prior art.

Technical solution

In order to achieve the purpose, the invention provides a clamping device for automatically welding a bumper, which comprises a bottom frame, wherein an energy absorption box clamping mechanism and a main beam pressing mechanism are arranged on the upper side of the bottom frame, the energy absorption box clamping mechanisms comprise two groups which are respectively arranged on the upper two sides of the bottom frame, the main beam pressing mechanism comprises a pressing mechanism and a side pressing mechanism, the pressing mechanism comprises a support frame arranged on the upper side of the bottom frame and a jacking assembly arranged on the rear side of the support frame, the jacking assembly is connected with a pressing beam and used for adjusting the pressing beam to move up and down, the pressing beam comprises two pressing beams which are oppositely arranged on the two sides of the jacking assembly, the pressing beam is provided with a main beam pressing assembly used for pressing the main beam on the upper side of the energy absorption box, the side pressing mechanism comprises a plurality of side pressing cylinders fixed on the upper side of the bottom frame, the side pressing cylinders are connected with side pressing blocks, and the side pressing blocks are oppositely provided with main beam limiting blocks, the main beam limiting block is fixed on the upper side of the underframe, and the main beam is pressed between the side pressing block and the main beam limiting block by the side pressure cylinder.

Further, the chassis comprises a bottom beam and side beams fixed to the front sides of the two ends of the bottom beam, the bottom beam and the side beams form a C-shaped structure, a plurality of bearing beams are arranged in the middle of the bottom beam and arranged on the same side of the side beams, the front ends of the bearing beams are connected to one side of the connecting beam, base plates are fixed to the upper sides of the bottom beam and the bearing beams, and the energy absorption box clamping mechanisms are installed at the two ends of the connecting beam.

Furthermore, energy-absorbing box clamping mechanism is including fixing bedplate and two clamping jaws at the tie-beam both ends, two clamping jaws articulate the bedplate upside relatively, and each clamping jaw is articulated through linking arm and clamping jaw control cylinder, clamping jaw control cylinder control clamping jaw upset to unclamp and press from both sides tight energy-absorbing box.

Further, the jacking subassembly includes pressure roof beam cylinder and support, the support is including being diaphragm and the riser that the L form set up, the upside at the chassis is fixed to the diaphragm, the pressure roof beam cylinder is connected with the slide through the head that floats, slide and riser pass through slider and slide rail mechanism sliding connection, the riser middle part is equipped with vertical opening, the slide front side is connected with the front bezel through a plurality of connecting blocks, the connecting block sets up in vertical opening, two pressure roof beams set up the both sides at the front bezel respectively.

Furthermore, the main beam pressing assembly comprises a pressing wheel and a pneumatic pressing block assembly, the pressing wheel is arranged on the lower side of the pressing beam, the pneumatic pressing block assembly is arranged on the outer side of the pressing wheel and comprises a pressing cylinder and a pressing block connected with the pressing cylinder, and a buffer spring is arranged between the pressing wheel and the pressing beam.

Further, chassis upside still is equipped with supplementary supporting shoe and girder locating component, girder locating component includes the pedestal, pedestal upside bolted connection has first adjusting block, first adjusting block one side bolted connection has the locating piece, locating piece lateral part bolted connection has the second adjusting block, be equipped with the girder locating pin on the second adjusting block, be equipped with the adjusting shim of a plurality of different thickness between first adjusting block and the locating piece and between locating piece and the second adjusting block respectively.

Furthermore, the energy-absorbing box positioning support assembly comprises an L-shaped reference block and an adjusting block which are connected to the base through bolts, the L-shaped reference block is connected with the adjusting block through bolts, a support block and an energy-absorbing box positioning pin are arranged on the upper side of the adjusting block, the upper end of the energy-absorbing box positioning pin is higher than the upper surface of the adjusting block, and a plurality of adjusting gaskets with different thicknesses are arranged between two side portions of the L-shaped reference block and the adjusting block and between the adjusting block and the support block.

Furthermore, the clamping jaw control cylinder is arranged on the lower side of the seat plate, and the seat plate is provided with a through hole for the connecting arm to pass through; all be equipped with a plurality of through-holes on adjusting block and the bedplate, the bedplate downside is equipped with energy-absorbing box jacking cylinder, energy-absorbing box jacking cylinder is connected with the connecting block, the connecting block upside is equipped with a plurality of ejector pins, the ejector pin interlude sets up in the through-hole, energy-absorbing box jacking cylinder is under the contraction state, the upper end of ejector pin is less than the supporting shoe, energy-absorbing box jacking cylinder is under the state of stretching out, the upper end of ejector pin is higher than the upper end of energy-absorbing box locating pin.

Furthermore, the outer side of the side beam is connected with a positioner adapter plate so as to install the underframe on the positioner; and a calibration plate is arranged on the upper side of the side beam, and a three-coordinate reference hole and a TCP assembly are arranged on the calibration plate.

Further, including the marking machine, the marking machine passes through the marking machine keysets and fixes the front side at the front bezel, the marking machine sets up between two pressure beams.

Advantageous effects

1. The underframe is welded by adopting the C-shaped steel structure stiffened plate, the whole structure is compact, the appearance is attractive, enough space is left on the inner side while the strength and the rigidity are ensured, and a welding seam can be formed at one time by adopting welding robot welding.

2. The energy absorption box clamping mechanism adopts a link mechanism, the problem of narrow space is effectively solved, the whole layout is placed under the energy absorption box, the position of the clamping jaw is as low as possible when the clamping jaw is clamped, the peripheral position of the welding seam is avoided as far as possible compared with other devices, and the accessibility, the posture and the one-step forming of the welding seam are ensured.

3. The single-side double-cylinder output mechanism is adopted, so that the energy absorption box is uniformly ejected and stressed when unloading workpieces on each side, the workpieces are conveniently taken manually, and the workpiece loading and unloading efficiency of workers can be greatly improved.

4. The energy absorption box is provided with mechanical positioning support and error prevention measures, so that the risk of continuing operation due to operation error of workers can be effectively avoided, a sensor detection device is added, the reliability of welding operation is improved, and the labor production efficiency is improved.

5. The main beam clamping adopts a form that one beam pressing cylinder and two pressing cylinders are added, after the whole beam pressing cylinder is clamped in place, the two pressing cylinders clamp two sides, and the main beam positioning assembly is combined to ensure that the main beam is accurately positioned and clamped, so that the stability and reliability of subsequent welding operation are ensured. 6. The main beam jacking assembly adopts a form of an air cylinder and a guide rail, and the rigidity of the whole device is ensured by adjusting the speed of the air cylinder to be as slow as possible on the premise of ensuring the beat; a buffer device is added to reduce impact; the floating head is adopted at the joint, so that the lifting operation is stable, safe and reliable; the locking mechanism of the cylinder can keep the position of the device under the condition of power failure and gas interruption, thereby ensuring the operation safety of workers.

7. The marking station is integrated, the production efficiency is improved, the installation position is in the center of the device, and the overall structure is symmetrical and attractive on the premise of ensuring the marking function.

Drawings

FIG. 1 is a schematic perspective view of a clamping device for automatic bumper welding;

FIG. 2 is a front view of a clamping device for automatic bumper welding;

FIG. 3 is a schematic view of the construction of the base frame of the clamping device for automatic welding of the bumper;

FIG. 4 is a schematic view of the hold-down mechanism of the main beam hold-down mechanism;

FIG. 5 is a partial schematic view of a crash box clamp mechanism area;

FIG. 6 is a schematic view of the jaw connection to the jaw control cylinder;

FIG. 7 is a partial schematic view of a side pressure mechanism of the main beam hold down mechanism;

FIG. 8 is a schematic structural view of a main beam stopper of the main beam pressing mechanism;

FIG. 9 is a schematic structural view of the main beam positioning assembly;

FIG. 10 is a schematic view of the support of the main beam hold down mechanism;

FIG. 11 is a schematic view of the auxiliary support block of the main beam hold down mechanism;

FIG. 12 is a schematic structural view of a jacking cylinder, a connecting hole and a mandril of the energy absorption box.

Modes for carrying out the invention

The present invention will be further illustrated with reference to the accompanying drawings and specific examples, which are carried out on the premise of the technical solution of the present invention, and it should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1 to 12, the embodiment of the invention provides a clamping device for automatic bumper welding, which comprises an underframe 1, wherein an energy absorption box clamping mechanism 4 and a main beam pressing mechanism are arranged on the upper side of the underframe 1. The energy absorption box clamping mechanisms 4 comprise two groups, and the two groups are respectively used for fixing one energy absorption box. Two groups of energy absorption box clamping mechanisms 4 are respectively arranged on the upper two sides of the underframe 1, and the main beam pressing mechanism comprises a pressing mechanism and a side pressing mechanism 3. Wherein, the mechanism that pushes down includes support frame 21, jacking subassembly, pressure roof beam 22 and girder compress tightly the subassembly. The fixed upside that sets up at chassis 1 of support frame 21, the jacking subassembly sets up the dorsal part at support frame 21, jacking subassembly and pressure roof beam 22 fixed connection, and the jacking subassembly is used for the drive to press roof beam 22 up-and-down motion, and pressure roof beam 22 includes two to, two pressure roof beams 22 set up the both sides at the jacking subassembly relatively, are equipped with on pressure roof beam 22 to be used for pressing the girder at the energy-absorbing box upside with the girder and compress tightly the subassembly.

As shown in fig. 1, 2, 7 and 8, the side pressure mechanism 3 of the embodiment of the present invention includes a side pressure cylinder 31, a side pressure block 32 and a main beam stopper 33. Preferably, two pressure cylinders 31 are used, the side pressure cylinder 31 is fixed on the upper side of the underframe 1 through an L-shaped cylinder seat 34, the side pressure block 32 is connected on a driving rod of the side pressure cylinder 31, the side pressure block 32 is arranged opposite to the main beam limiting block 33, the main beam limiting block 33 is fixed on the upper side of the underframe 1, the main beam is placed between the side pressure block 32 and the main beam limiting block 33, and the side pressure cylinder 31 can drive the side pressure block 32 to move towards the main beam limiting block 33 so as to press the main beam between the side pressure block 32 and the main beam limiting block 33. The main beam limiting block 33 comprises a first main beam limiting block 331 and a second main beam limiting block 332 fixed on the upper portion of the first main beam limiting block 331 side through a countersunk head bolt, and the second main beam limiting block 332 and the side pressure block 32 are preferably 304 steel blocks so as to prevent the main beam from being scratched. In order to prevent an excessive impact force on the main beam when the side pressure cylinder 31 is operated, a side pressure cylinder stopper 35 is fixed to the base frame 1 between the side pressure block 32 and the main beam stopper 33.

As shown in fig. 1 to 3, the underframe 1 of the embodiment of the invention comprises a base beam 11, a side beam 12, a base plate 13, a load beam 14 and a connecting beam 15. Two side beams 12 are respectively fixed on the front sides of two ends of the bottom beam 1, and further, the bottom beam 11 and the side beams 12 form a C-shaped structure. The number of the load beams 14 is not preferably two, the two load beams 14 are arranged at intervals in the middle of the bottom beam 11, the load beams 14 are arranged on the same side as the side beams 12, the front end of the load beam 14 is connected to one side of the connecting beam 15, the base plate 13 fixes the upper sides of the bottom beam 11 and the load beams 14, and the energy absorption box clamping mechanisms 4 are arranged at two ends of the connecting beam 15. In order to facilitate the transportation by a forklift, two fork plates 18 are respectively and oppositely fixed on the bottom beam 11 and the connecting beam 15, and fork openings 19 are arranged on the fork plates.

As shown in fig. 3, 4 and 10, the jacking assembly of the embodiment of the invention comprises a compression beam cylinder 23 and a support 24, wherein the support 24 comprises a transverse plate 241 and a vertical plate 242 which are arranged in an L shape, and in order to improve stability, a triangular plate 244 is further arranged between the transverse plate 241 and the vertical plate 242 at two end positions. The pressing beam cylinder 23 is provided with a locking mechanism, so that the device can be kept in position under the condition of power failure and gas interruption, and the operation safety of workers is ensured. The horizontal plate 241 is fixed to the upper side of the base frame 1, the slide plate 25 is connected to the pressing beam cylinder 23, and the floating head 231 is connected between the pressing beam cylinder 23 and the slide plate 25 to reduce vibration. The sliding plate 25 is slidably connected to the vertical plate 242, and the pressing beam cylinder 23 can push the sliding plate 25 to move up and down. In order to reasonably utilize the space below the bottom beam 1, the pressing beam cylinder 23 is fixed below the transverse plate 241, the avoidance hole 131 is formed in the base plate 13, and the pressing beam cylinder 23 extends into the lower side of the base plate 13. In order to avoid that the chassis 1 is too heavy, the base plate 13 is also provided with a weight-reducing opening 132.

As shown in fig. 1, 5 and 6, the crash box clamping mechanism 4 according to the embodiment of the present invention includes a seat plate 41, a clamping jaw 42 and a clamping jaw control cylinder 43, wherein the seat plate 41 is fixed to both ends of the connecting beam 15, specifically, the seat plate 41 is fixed to an outer side of a first connecting plate 45, a second connecting plate 46 is fixed to both ends of the connecting beam 15, the first connecting plate 45 is bolted to the second connecting plate 46, and a support plate 47 is further fixed between a lower side of the seat plate 41 and the first connecting plate 45 for improving stability. Each energy absorption box clamping mechanism 4 comprises two clamping jaws 42, two groups of hinged plates 48 are arranged on the upper side of the seat plate 41, each group of hinged plates comprises two hinged plates 48 which are oppositely arranged, the two clamping jaws 42 are respectively hinged between the two groups of hinged plates 48, each clamping jaw 42 is hinged with a clamping jaw control cylinder 43 through a connecting arm 44, and the clamping jaws 42 are controlled to turn over when the clamping jaw control cylinders 43 stretch and contract, so that the energy absorption boxes are loosened and clamped.

As shown in FIG. 5, in order to place the crash box on the device accurately, a crash box positioning and supporting assembly 7 is further arranged on the seat plate 41 at the inner side of the clamping jaw 42, the crash box positioning and supporting assembly of the embodiment of the invention comprises an L-shaped reference block 71 and an adjusting block 72 which are connected to the base through bolts, the L-shaped reference block 71 is connected with the adjusting block 72 through bolts, a supporting block 73 and a crash box positioning pin 74 are arranged on the upper side of the adjusting block 72, the upper end of the crash box positioning pin 74 is higher than the upper surface of the adjusting block 72, and the upper end of the crash box positioning pin 74 is preferably arranged in a conical shape so as to be placed in the crash box positioning pin. A plurality of adjusting gaskets with different thicknesses are arranged between two side parts of the L-shaped reference block 71 and the adjusting block 72, so that the positions of the positioning pin 74 of the energy-absorbing box in the front-back direction and the left-right direction can be adjusted by subtracting the adjusting gaskets with corresponding thicknesses so as to correspond to the positioning holes in the energy-absorbing box. A plurality of adjusting shims having different thicknesses are also provided between the adjusting block 72 and the supporting block 73, so that the height of the supporting block 73 can be adjusted by subtracting the adjusting shims having the corresponding thicknesses. In order to prevent the crash box from being manually misplaced, a mistake-proofing pin 78 is further arranged on the upper side of the seat plate 41, the mistake-proofing pin 78 corresponds to a mistake-proofing hole on the bottom of the crash box, and the crash box cannot be put down when the direction of the crash box is mistake-proofing.

As shown in fig. 5, in order to make the best use of the space below the seat plate 41, the jaw control cylinder 43 according to the embodiment of the present invention is disposed below the seat plate 41, a through hole 411 through which the connecting arm 44 passes is formed in the seat plate 41, and the connecting arm 44 is inserted into the through hole 411.

As shown in fig. 5 and 12, after the welding is completed, in order to facilitate the removal of the bumper, a plurality of through holes 412 are formed in the adjusting block 72 and the seat plate 41, the energy absorption box jacking cylinder 75 is arranged on the lower side of the seat plate 41, the energy absorption box jacking cylinder 75 is connected with the connecting block 76, a plurality of ejector rods 77 are arranged on the upper side of the connecting block 76, and the ejector rods 77 are inserted into the through holes 412. When the crash box jacking cylinder 75 is in a contracted state, the upper end of the ejector rod 77 is lower than the upper surface of the supporting block 73, and when the crash box jacking cylinder 75 is in an extended state, the upper end of the ejector rod 77 is higher than the upper ends of the crash box positioning pin 74 and the mistake-proofing pin 78. After welding is completed, the energy absorption box clamping mechanism 4 and the main beam pressing mechanism are loosened, the energy absorption box jacking cylinder 75 jacks up the bumper through the ejector rod 77, and the bumper is separated from the energy absorption box positioning pin 74, the mistake proofing pin 78 and the main beam positioning pin 65, so that the bumper can be conveniently taken down. In order to improve the jacking stability, the ejector pins 77 are preferably two, and the two ejector pins 77 are respectively provided on both sides of the crash box positioning pin 74.

As shown in fig. 1, in order to facilitate mounting of the apparatus on a positioner, a positioner adapter plate 16 is connected to the outer side of the side member 12, and the chassis 1 is mounted on the positioner by means of the adapter plate 16. For the convenience of detection, a calibration plate 9 is provided on the upper side of the side member 12, a three-coordinate reference hole 91 is provided in the calibration plate 9, and the three-coordinate reference hole 91 serves as a reference point for detecting the three-coordinate of each component. In order to provide a working reference for the welding robot, a TCP assembly 92 is also provided on the calibration plate 9.

As shown in fig. 3, in order to improve the structural strength of the underframe 1, reinforcing rib plates are provided between the bottom beam 11 and the side beam 12 and the carrier beam 14, between the connecting beam 15 and the carrier beam 14 and the second connecting plate 46, and between the side beam 12 and the positioner adapter plate 16. After the device is installed on a positioner, the stress between the bottom beam 11 and the side beam 12 is large, so that two reinforcing rib plates 17 are adopted between the bottom beam 11 and the side beam 12, and the reinforcing rib plates 17 are in an L shape. Triangular reinforcing rib plates are preferably adopted between the bottom beam 11 and the carrier beam 14, between the connecting beam 15 and the carrier beam 14 and the second connecting plate 46, and between the side beam 12 and the positioner adapter plate 16.

As a preferred embodiment, a slide block 26 is fixedly arranged on the front side of the sliding plate 25, a slide rail 27 matched with the slide block 26 is arranged on the back side of the vertical plate 242, and the sliding plate 25 can be laterally limited by adopting a slide block slide rail mechanism, so that the sliding plate 25 can be ensured to stably move up and down. Be equipped with vertical opening 243 in the middle part of riser 242, the front side of slide 25 is connected with front bezel 29 through a plurality of connecting blocks 28, and connecting block 28 sets up in vertical opening 243, and then, connecting block 28 does not influence slide 25 and slides from top to bottom. The front plate 29 is preferably arranged at an interval with the vertical plate 242, the two pressing beams 22 are respectively fixed on two sides of the front plate 29, and when the pressing beam cylinder 23 extends and retracts, the pressing beams 22 are driven by the sliding plate 25, the connecting block 28 and the front plate 29 to move up and down, so that the main beam is loosened and pressed on the upper side of the energy absorption box.

As shown in fig. 2 and 4, the main beam pressing assembly according to the embodiment of the present invention includes a pressing wheel 51 and a pneumatic pressing block assembly 52 that are disposed at a lower side of the pressing beam 22, the pneumatic pressing block assembly 52 is disposed at an outer side of the pressing wheel 51, the pneumatic pressing block assembly according to the embodiment of the present invention includes a pressing cylinder 53 and a pressing block 54 connected to the pressing cylinder 53, and a buffer spring 55 is disposed between the pressing wheel 51 and the pressing beam 22. When the main beam is placed on the device, the main beam is laterally compressed through the lateral pressing mechanism, then the pressing beam 22 is driven to descend through the jacking assembly, the main beam is pressed on the energy absorption box through the pressing wheel 51, then the pressing cylinder 53 pushes the pressing block 54 downwards, and the main beam is further compressed. The buffer spring 55 and the lateral pressure cylinder stopper 34 can reduce the impact of the main beam clamping action.

As shown in fig. 1, 2 and 9, in order to prevent the position deviation of the main beam when the main beam is placed on the device, a main beam positioning assembly 6 is further arranged on the upper side of the base frame 1, the main beam positioning assembly 6 comprises a base 61, the base 61 is in an i-shape, the bottom of the base 61 is fixed on the base frame 1, a first adjusting block 62 is bolted on the upper side of the base 61, a positioning block 63 is bolted on one side of the first adjusting block 62, a second adjusting block 64 is bolted on the side of the positioning block 63, a main beam positioning pin 65 is arranged on the second adjusting block 64, and a plurality of adjusting gaskets with different thicknesses are respectively arranged between the first adjusting block 62 and the positioning block 63 and between the positioning block 63 and the second adjusting block 64. By increasing or decreasing the adjusting shim, the position of the main beam positioning pin 65 can be adjusted in the front-back direction and the left-right direction so as to correspond to the positioning hole on the main beam. Taking the adjustment gaps between the first adjusting block 62 and the positioning block 63 and between the positioning block 63 and the second adjusting block 64 as 3mm as an example, the number of the adopted adjusting shims may be five, and the optimal thicknesses are two adjusting shims of 1mm, one adjusting shim of 0.5mm, one adjusting shim of 0.3 mm and one adjusting shim of 0.2mm, and the positions of the main beam positioning pins 65 can be adjusted by subtracting the adjusting shims of corresponding sizes according to different errors.

As shown in fig. 11, in order to prevent the main beam from deforming during welding, an auxiliary supporting block 8 is further provided on the upper side of the base frame 1, and the auxiliary supporting block 8 is disposed between the two lateral pressing mechanisms 3. The auxiliary supporting block 8 of the embodiment of the invention comprises a first auxiliary supporting block 81 fixed on the upper side of the first chassis 1 and a second auxiliary supporting block 82 connected to the upper end of the first auxiliary supporting block 81 through a countersunk bolt, wherein the first auxiliary supporting block 81 is in an L shape, and the second auxiliary supporting block 82 is preferably a 304 steel block to prevent the main beam from being scratched.

As shown in fig. 1, 5 and 9, the embodiment of the present invention further integrates a marking machine 100, the marking machine 100 is fixed on the front side of the front plate 29 by a marking machine adapter plate 101, and the marking machine 100 is disposed between the two press beams 22. A proximity switch 103 is further provided on one side of the crash box clamping mechanism 4, the proximity switch 103 is used for detecting whether the crash box is put in, and the proximity switch 103 is preferably mounted on the upper side of the second connecting plate 46 through a bracket. A proximity switch 104 is also provided on the upper side of the pedestal 61 via a bracket, and the proximity switch 104 is used to detect whether a main beam is inserted.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that other parts not specifically described are within the prior art or common general knowledge to those of ordinary skill in the art. Without departing from the principle of the invention, several improvements and modifications can be made, and these improvements and modifications should also be construed as the scope of the invention.

Claims

A clamping device for automatic welding of bumpers is characterized by comprising a chassis, wherein an energy absorption box clamping mechanism and a main beam pressing mechanism are arranged on the upper side of the chassis, the energy absorption box clamping mechanisms comprise two groups which are respectively arranged on the upper two sides of the chassis, the main beam pressing mechanism comprises a pressing mechanism and a side pressing mechanism, the pressing mechanism comprises a support frame arranged on the upper side of the chassis and a jacking assembly arranged on the rear side of the support frame, the jacking assembly is connected with a pressing beam and used for adjusting the pressing beam to move up and down, the pressing beam comprises two pressing beams which are oppositely arranged on the two sides of the jacking assembly, the pressing beam is provided with a main beam pressing assembly for pressing a main beam on the upper side of the energy absorption box, the side pressing mechanism comprises a plurality of side pressing air cylinders fixed on the upper side of the chassis, the side pressing air cylinders are connected with side pressing blocks, and the side pressing blocks are oppositely provided with limit blocks, the main beam limiting block is fixed on the upper side of the underframe, and the main beam is pressed between the side pressing block and the main beam limiting block by the side pressure cylinder.
The clamping device for automatically welding the bumper as claimed in claim 1, wherein the bottom frame comprises a bottom beam and side beams fixed at the front sides of the two ends of the bottom beam, the bottom beam and the side beams form a C-shaped structure, a plurality of load-bearing beams are arranged in the middle of the bottom beam, the load-bearing beams are arranged at the same side as the side beams, the front ends of the load-bearing beams are connected to one side of the connecting beam, base plates are fixed at the upper sides of the bottom beam and the load-bearing beams, and the energy-absorbing box clamping mechanisms are installed at the two ends of the connecting beam.
The clamping device for the automatic welding of the bumpers as recited in claim 2, wherein said energy-absorbing box clamping mechanism comprises a base plate fixed at both ends of the connecting beam and two clamping jaws hinged relatively on the upper side of the base plate, each clamping jaw is hinged with a clamping jaw control cylinder through a connecting arm, said clamping jaw control cylinder controls the clamping jaw to turn over to loosen and clamp the energy-absorbing box.
The clamping device for automatic bumper welding according to claim 1, wherein the jacking assembly comprises a pressing beam cylinder and a support, the support comprises a transverse plate and a vertical plate which are arranged in an L shape, the transverse plate is fixed on the upper side of the bottom frame, the pressing beam cylinder is connected with a sliding plate through a floating head, the sliding plate and the vertical plate are connected with a sliding rail mechanism in a sliding mode through a sliding block, a vertical opening is formed in the middle of the vertical plate, the front side of the sliding plate is connected with a front plate through a plurality of connecting blocks, the connecting blocks are arranged in the vertical opening, and the two pressing beams are arranged on two sides of the front plate respectively.
The clamping device for automatic bumper welding according to claim 1, wherein the main beam pressing assembly comprises a pressing wheel and a pneumatic pressing block assembly, the pressing wheel and the pneumatic pressing block assembly are arranged on the lower side of the pressing beam, the pneumatic pressing block assembly is arranged on the outer side of the pressing wheel, the pneumatic pressing block assembly comprises a pressing cylinder and a pressing block connected with the pressing cylinder, and a buffer spring is arranged between the pressing wheel and the pressing beam.
The clamping device for automatically welding the bumper as claimed in claim 1, wherein an auxiliary supporting block and a main beam positioning component are further arranged on the upper side of the underframe, the main beam positioning component comprises a pedestal, a first adjusting block is connected to the upper side of the pedestal through a bolt, a positioning block is connected to one side of the first adjusting block through a bolt, a second adjusting block is connected to the side of the positioning block through a bolt, a main beam positioning pin is arranged on the second adjusting block, and a plurality of adjusting gaskets with different thicknesses are respectively arranged between the first adjusting block and the positioning block and between the positioning block and the second adjusting block.
The clamping device for the automatic bumper welding according to claim 3, wherein the energy-absorbing box positioning and supporting assembly comprises an L-shaped reference block and an adjusting block which are connected to the base through bolts, the L-shaped reference block is connected with the adjusting block through bolts, a supporting block and an energy-absorbing box positioning pin are arranged on the upper side of the adjusting block, the upper end of the energy-absorbing box positioning pin is higher than the upper surface of the adjusting block, and a plurality of adjusting gaskets with different thicknesses are arranged between two side portions of the L-shaped reference block and the adjusting block and between the adjusting block and the supporting block.
The clamping device for automatic bumper welding according to claim 7, wherein the clamping jaw control cylinder is arranged at the lower side of a seat plate, and the seat plate is provided with a through hole for a connecting arm to pass through; all be equipped with a plurality of through-holes on adjusting block and the bedplate, the bedplate downside is equipped with energy-absorbing box jacking cylinder, energy-absorbing box jacking cylinder is connected with the connecting block, the connecting block upside is equipped with a plurality of ejector pins, the ejector pin interlude sets up in the through-hole, energy-absorbing box jacking cylinder is under the contraction state, the upper end of ejector pin is less than the supporting shoe, energy-absorbing box jacking cylinder is under the state of stretching out, the upper end of ejector pin is higher than the upper end of energy-absorbing box locating pin.
The clamping device for automatically welding the bumper as claimed in claim 2, wherein a positioner adapter plate is connected to the outer side of the side beam to mount the underframe on a positioner; and a calibration plate is arranged on the upper side of the side beam, and a three-coordinate reference hole and a TCP assembly are arranged on the calibration plate.
The device of claim 2, comprising a marking machine, wherein the marking machine is fixed on the front side of the front plate through a marking machine adapter plate, and the marking machine is arranged between the two press beams.