WO2020244124A1

WO2020244124A1 - Clamping mechanism for energy absorption box

Info

Publication number: WO2020244124A1
Application number: PCT/CN2019/112742
Authority: WO
Inventors: 徐楠华; 李长伟; 王小满
Original assignee: 南京英尼格玛工业自动化技术有限公司
Priority date: 2019-06-03
Filing date: 2019-10-23
Publication date: 2020-12-10
Also published as: CN113966267A; CN110154072A; CN113966267B

Abstract

Disclosed is a clamping mechanism (4) for an energy absorption box, the clamping mechanism comprising a base plate (41) and two clamping jaws (42). Two sets of hinge plates (48) are arranged on an upper side of the base plate, each set of hinge plates comprises two hinge plates which are oppositely arranged, the two clamping jaws are respectively hinged at a position between one set of hinge plates, each clamping jaw is hinged to a clamping jaw control cylinder (43) by means of a connection arm (44), the clamping jaw control cylinder controls the clamping jaw to overturn so as to loosen and clamp an energy absorption box, and an energy absorption box positioning and supporting assembly (7) is further arranged at the position on inner sides of the clamping jaws, of the base plate. The clamping mechanism for the energy absorption box effectively solves the problem of a narrow space, the clamping mechanism is placed under the energy absorption box in an integral layout manner, the position is as low as possible when the clamping jaws clamp, compared with other devices, a peripheral position of a welding seam is avoided as far as possible, and the accessibility of a welding gun, and forming of a posture and the welding seam in one step are guaranteed.

Description

Energy-absorbing box clamping mechanism

Technical field

The invention relates to the field of automatic welding of bumpers, in particular to an energy-absorbing box clamping mechanism.

Background technique

With the development of the automobile industry, automobile bumpers, as an important safety device, are also on the road of innovation. Today's car front and rear bumpers not only maintain the original protection function, but also pursue harmony and unity with the body shape, and pursue their own lightweight. Since the car bumper can absorb and relieve the external impact to protect the body and passengers, the quality of the bumper is very important at this time, and the welding quality is the most important. Traditional bumper welding is difficult to achieve quality stability and controllability due to manual welding speed, wire feeding speed, welding posture, etc.; in addition, workers have low labor efficiency, high labor intensity, and high requirements for workers. Conducive to enterprise cost control is also a drawback of the existing technology.

technical problem

The purpose of the present invention is to provide an energy absorbing box clamping mechanism in view of the shortcomings of the prior art.

Technical solutions

In order to achieve the above objective, the present invention provides an energy-absorbing box clamping mechanism, which includes a seat plate and two clamping jaws. The upper side of the seat plate is provided with two sets of hinge plates, and each set of hinge plates includes two oppositely arranged hinge plates. Two hinged plates, two clamping jaws are respectively hinged between a set of hinged plates, each clamping jaw is hinged with a clamping jaw control cylinder through a connecting arm, and the clamping jaw controls the cylinder to control the rotation of the clamping jaw to loosen and clamp the suction An energy box, the seat plate on the inner side of the clamping jaws is also provided with an energy absorbing box positioning support assembly.

Further, the energy absorbing box positioning support assembly includes an L-shaped reference block and an adjustment block bolted to the base, the L-shaped reference block is bolted to the adjustment block, and the upper side of the adjustment block is provided with a support block and an energy absorption block. Box positioning pin, the upper end of the energy-absorbing box positioning pin is higher than the upper surface of the adjustment block, and a plurality of sets are provided between the L-shaped reference block and the two sides of the adjustment block and between the adjustment block and the support block. Adjusting shims of different thicknesses.

Further, the upper side of the seat plate is also provided with an anti-error pin.

Further, 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, and the connecting arm is inserted and arranged in the through hole.

Further, both the adjusting block and the seat plate are provided with a number of through holes, the lower side of the seat plate is provided with an energy absorbing box lifting cylinder, the energy absorbing box lifting cylinder is connected with a connecting block, and the connecting block A number of ejector rods are provided on the upper side, and each ejector rod is inserted and arranged in a through hole. When the energy absorbing box lifting cylinder is in a contracted state, the upper end of the ejector rod is lower than the support block, and the energy absorbing box When the jacking cylinder is in the extended state, the upper end of the jack rod is higher than the upper end of the positioning pin of the energy absorbing box.

Further, the ejector rods include two, which are respectively arranged on both sides of the positioning pin of the energy absorbing box.

Further, the upper end of the positioning pin of the energy absorbing box is in a tapered shape.

Beneficial effect

1. The clamping mechanism of the energy absorbing box adopts a linkage mechanism, which effectively solves the problem of small space. The overall layout is placed directly under the energy absorbing box, and the clamping jaws are clamped as low as possible, compared with other devices around the weld. Keep the position as far away as possible to ensure the accessibility of the welding torch, posture and welding seam forming at one time.

2. The single-side double-cylinder output mechanism is adopted to ensure that the ejection force of the energy absorbing box is even when the parts are loaded on each side, and it is convenient to manually pick up the parts, which can greatly improve the efficiency of workers' loading and unloading.

3. Add mechanical positioning support and anti-misplacement measures to the energy-absorbing box, which can effectively avoid the risk of workers' misplacement and continue operation, and increase the sensor detection device to improve the reliability of welding operations and increase labor productivity.

Description of the drawings

Figure 1 is a three-dimensional schematic diagram of a clamping device for automatic bumper welding;

Figure 2 is a front view of a clamping device for automatic welding of bumpers;

Figure 3 is a schematic structural view of the underframe of the clamping device used for automatic bumper welding;

Figure 4 is a schematic structural view of the pressing mechanism of the main beam pressing mechanism;

Figure 5 is a partial schematic diagram of the region of the energy absorbing box clamping mechanism;

Figure 6 is a schematic diagram of the connection of the gripper and the gripper control cylinder;

Figure 7 is a partial schematic diagram of the side pressing mechanism of the main beam pressing mechanism;

Figure 8 is a schematic structural diagram of the main beam limiting block of the main beam pressing mechanism;

Figure 9 is a schematic diagram of the main beam positioning assembly;

Figure 10 is a schematic structural view of the support of the main beam pressing mechanism;

Figure 11 is a schematic structural view of an auxiliary support block of the main beam pressing mechanism;

Figure 12 is a schematic view of the structure of the energy absorbing box jacking cylinder, connecting hole and ejector rod.

Embodiments of the invention

The present invention will be further clarified below in conjunction with the drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention.

As shown in Figures 1 to 12, the embodiment of the present invention provides a clamping device for automatic bumper welding. The device includes a base frame 1, and the upper side of the base frame 1 is provided with an energy-absorbing box clamping mechanism 4 and a main Beam pressing mechanism. Among them, the energy absorbing box clamping mechanism 4 includes two groups, which are respectively used to fix one energy absorbing box. Two sets of energy absorbing box clamping mechanisms 4 are respectively arranged on the upper two sides of the chassis 1, and the main beam pressing mechanism includes a downward pressing mechanism and a side pressing mechanism 3. Among them, the pressing mechanism includes a support frame 21, a jacking assembly, a pressing beam 22, and a main beam pressing assembly. The support frame 21 is fixedly arranged on the upper side of the base frame 1, the jacking assembly is arranged on the back side of the support frame 21, the jacking assembly is fixedly connected with the pressure beam 22, and the jacking assembly is used to drive the pressure beam 22 to move up and down. It includes two, and the two pressure beams 22 are oppositely arranged on both sides of the jacking assembly, and the pressure beam 22 is provided with a main beam pressing assembly for pressing the main beam on the upper side of the energy absorbing box.

As shown in FIGS. 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 limiting block 33. Two pressure cylinders 31 are preferably used. The side pressure cylinder 31 is fixed on the upper side of the underframe 1 through an L-shaped cylinder block 34. The side pressure block 32 is connected to the drive rod of the side pressure cylinder 31. The side pressure block 32 is limited to the main beam. The positioning blocks 33 are arranged oppositely, 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 The main beam limiting block 33 moves, thereby pressing the main beam between the side pressing block 32 and the main beam limiting block 33. The main beam limiting block 33 includes a first main beam limiting block 331 and a second main beam limiting block 332 fixed on the upper side of the first main beam limiting block 331 by countersunk bolts, the second main beam limiting block 332 and The side pressure block 32 is preferably a 304 steel block to prevent the main beam from being scratched. In order to prevent excessive impact force on the main beam when the side pressure cylinder 31 moves, a side pressure cylinder limit block 35 is fixed on the underframe 1 between the side pressure block 32 and the main beam limit block 33.

As shown in FIGS. 1 to 3, the underframe 1 of the embodiment of the present invention includes a bottom beam 11, a side beam 12, a base plate 13, a load beam 14 and a connecting beam 15. Among them, there are two side beams 12, which are respectively fixed to the front sides of both ends of the bottom beam 1, and further, the bottom beam 11 and the side beams 12 form a C-shaped structure. There are also two load-bearing beams 14. The two load-bearing beams 14 are arranged at intervals in the middle of the bottom beam 11, and the load-bearing beam 14 is arranged on the same side as the side beam 12, and the front end of the load-bearing beam 14 is connected to one side of the connecting beam 15. , The base plate 13 fixes the upper side of the bottom beam 11 and the load beam 14, and the energy absorbing box clamping mechanism 4 is installed at both ends of the connecting beam 15. In order to facilitate transportation by a forklift, two fork plates 18 are relatively fixed on the bottom beam 11 and the connecting beam 15 respectively, and fork holes 19 are provided on the fork plates.

As shown in Figures 3, 4 and 10, the jacking assembly of the embodiment of the present invention includes a pressure beam cylinder 23 and a support 24, wherein the support 24 includes a horizontal plate 241 and a vertical plate 242 arranged in an L shape, in order to improve stability Therefore, between 241 and vertical plate 242, there are also triangular plates 244 at both ends. The pressure beam cylinder 23 is equipped with a locking mechanism that can maintain the position of the device when the power is cut off, thereby ensuring the safety of the worker's operation. The horizontal plate 241 is fixed on the upper side of the underframe 1, the beam cylinder 23 is connected with a sliding plate 25, and the sliding plate 25 is slidably connected to the vertical plate 242. Furthermore, the beam cylinder 23 can push the sliding plate 25 up and down. In order to reduce vibration, a floating head 231 is also connected between the pressure beam cylinder 23 and the sliding plate 25. In order to make reasonable use of the space on the lower side of the bottom beam 1, the pressure beam cylinder 23 is fixed on the lower side of the horizontal plate 241, and an escape hole 131 is opened on the base plate 13, and the pressure beam cylinder 23 extends into the lower side of the base plate 13. In order to prevent the base frame 1 from being too heavy, a weight reduction opening 132 is also opened on the base plate 13.

As shown in Figures 1, 5 and 6, the energy absorbing box clamping mechanism 4 of the embodiment of the present invention includes a seat plate 41, a clamping jaw 42 and a clamping jaw control cylinder 43. The seat plate 41 is fixed on both ends of the connecting beam 15. The seat plate 41 is fixed on the outside of the first connecting plate 45, and the second connecting plate 46 is fixed at both ends of the connecting beam 15. The first connecting plate 45 and the second connecting plate 46 are connected by bolts. In order to improve the stability, the seat A support plate 47 is also fixed between the lower side of the plate 41 and the first connecting plate 45. Each group of energy absorbing box clamping mechanism 4 includes two clamping jaws 42. Two sets of hinge plates 48 are provided on the upper side of the seat plate 41. Each group of hinge plates includes two opposite hinge plates 48. The two clamping jaws 42 respectively It is hinged between two sets of hinge plates 48. Each clamping jaw 42 is hinged with the clamping jaw control cylinder 43 through the connecting arm 44. When the clamping jaw controls the cylinder 43 to expand and contract, the clamping jaw 42 is controlled to turn over, thereby realizing loosening and clamping of the energy absorbing box .

As shown in Figure 5, in order to facilitate the accurate placement of the energy absorbing box on the device, an energy absorbing box positioning support assembly 7 is also provided on the seat plate 41 inside the clamping jaw 42. The energy absorbing box is positioned in the embodiment of the present invention. The support assembly includes an L-shaped reference block 71 and an adjustment block 72 bolted to the base. The L-shaped reference block 71 is bolted to the adjustment block 72. A support block 73 and an energy-absorbing box positioning pin 74 are provided on the upper side of the adjustment block 72 to absorb The upper end of the energy-absorbing box positioning pin 74 is higher than the upper surface of the adjusting block 72, and the upper end of the energy-absorbing box positioning pin 74 is preferably provided in a tapered shape for easy insertion. A plurality of adjusting shims of different thicknesses are arranged between the two sides of the L-shaped reference block 71 and the adjusting block 72, so that the front and rear and left and right sides of the positioning pin 74 of the energy absorption box can be adjusted by reducing the adjustment shims of corresponding thickness. The positions in each direction to correspond to the positioning holes on the energy absorbing box. A plurality of adjusting shims of 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 reducing the adjusting shims of corresponding thickness. In order to prevent the wrong energy absorbing box from being placed manually, an error prevention pin 78 is also provided on the upper side of the seat plate 41. The error prevention pin 78 corresponds to the position of the error prevention hole on the bottom of the energy absorbing box, and cannot be put down when the direction of the energy absorbing box is wrong.

As shown in FIG. 5, in order to make reasonable use of the space on the lower side of the seat plate 41, the gripper control cylinder 43 of the embodiment of the present invention is arranged on the lower side of the seat plate 41, and the seat plate 41 is provided with a through hole 411 for the connecting arm 44 to pass through. , The connecting arm 44 is inserted in the through hole 411.

As shown in Figures 5 and 12, after the welding is completed, in order to facilitate the removal of the bumper, a number of through holes 412 are provided on the adjustment block 72 and the seat plate 41, and an energy-absorbing box jacking box is provided on the lower side of the seat plate 41. The air cylinder 75 and the energy absorbing box lifting air cylinder 75 are connected with a connecting block 76. A plurality of jacks 77 are arranged on the upper side of the connecting block 76, and the jacks 77 are inserted and arranged in the through hole 412. When the energy-absorbing box lifting cylinder 75 is in the contracted state, the upper end of the ejector rod 77 is lower than the upper surface of the support block 73, and when the energy-absorbing box lifting cylinder 75 is in the extended state, the upper end of the ejector rod 77 is higher than the energy-absorbing box. The upper end of the pin 74 and the error prevention pin 78. After the welding is completed, the energy-absorbing box clamping mechanism 4 and the main beam pressing mechanism are loosened, and the energy-absorbing box lifting cylinder 75 lifts the bumper upwards through the ejector rod 77, from the energy-absorbing box positioning pin 74, the error prevention pin 78 and The main beam positioning pin 65 is disengaged to facilitate the removal of the bumper. In order to improve the stability of jacking, there are preferably two jacks 77, and the two jacks 77 are respectively arranged on both sides of the positioning pin 74 of the energy absorbing box.

As shown in Fig. 1, in order to facilitate the installation of the device on the positioner, a positioner adapter plate 16 is connected to the outside of the side beam 12, and the base frame 1 is installed on the positioner through the adapter plate 16. In order to facilitate detection, a calibration plate 9 is provided on the upper side of the side beam 12, and a three-coordinate reference hole 91 is provided on the calibration plate 9. The three-coordinate reference hole 91 serves as a reference point for detecting the three coordinates of each component. In order to provide a work reference for the welding robot, a TCP component 92 is also provided on the calibration board 9. To

As shown in Figure 3, in order to improve the structural strength of the underframe 1, between the bottom beam 11 and the side beam 12 and the load beam 14, the connecting beam 15 and the load beam 14 and the second connecting plate 46, and the side beam 12 and Reinforcing rib plates are arranged between the positioner adapter plates 16. Since the stress between the bottom beam 11 and the side beam 12 is relatively large after being installed on the positioner, two reinforcing rib plates 17 are used between the bottom beam 11 and the side beam 12, and the reinforcing rib plate 17 is L-shaped shape. Triangular stiffener plates are preferably used between the bottom beam 11 and the bearing beam 14, between the connecting beam 15 and the bearing 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 slider 26 is fixed on the front side of the slide plate 25, and a slide rail 27 that cooperates with the slider 26 is provided on the back side of the vertical plate 242. The slide rail mechanism can also be used to side the slide plate 25. To limit the position so as to ensure the stable up and down movement of the sliding board 25. A vertical opening 243 is provided in the middle of the vertical plate 242. The front side of the sliding plate 25 is connected to the front plate 29 through a number of connecting blocks 28. The connecting blocks 28 are arranged in the vertical opening 243. Furthermore, the connecting block 28 does not affect the up and down of the sliding plate 25. slide. The front plate 29 is preferably spaced from the vertical plate 242, and the two pressure beams 22 are respectively fixed on both sides of the front plate 29. When the pressure beam cylinder 23 expands and contracts, the slide plate 25, the connecting block 28, and the front plate 29 drive the pressure beam 22 to move up and down. , So as to loosen the main beam and press the main beam on the upper side of the energy absorbing box.

As shown in Figures 2 and 4, the main beam pressing assembly of the embodiment of the present invention includes a pressing wheel 51 and a pneumatic pressing block assembly 52 arranged on the lower side of the pressing beam 22, and the pneumatic pressing block assembly 52 is arranged on the outside of the pressing wheel 51, The pneumatic pressing block assembly of the embodiment of the present invention includes a pressing cylinder 53 and a pressing block 54 connected with the pressing cylinder 53. A buffer spring 55 is provided between the pressing wheel 51 and the pressing beam 22. When the main beam is placed on the device, the main beam is first compressed laterally by the side pressing mechanism, and then the pressure beam 22 is driven down by the jacking assembly, and the main beam is first pressed on the energy absorbing box by the pressure roller 51, and then down The pressing cylinder 53 pushes the lower pressing block 54 downward to further compress the main beam. The buffer spring 55 and the side pressure cylinder limit block 34 can reduce the impact of the clamping action of the main beam.

As shown in Figures 1, 2 and 9, in order to prevent the position deviation of the main beam when placed on the device, a main beam positioning assembly 6 is also provided on the upper side of the underframe 1. The main beam positioning assembly 6 includes a pedestal 61. 61 is in the shape of an I-shape, the bottom of the base 61 is fixed on the chassis 1, a first adjustment block 62 is bolted to the upper side of the base 61, and a positioning block 63 is bolted to one side of the first adjustment block 62. The positioning block The side of 63 is bolted with a second adjustment block 64. The second adjustment block 64 is provided with a main beam positioning pin 65 between the first adjustment block 62 and the positioning block 63 and between the positioning block 63 and the second adjustment block 64 A plurality of adjusting shims of different thickness are respectively provided. By adding or subtracting adjustment spacers, the position of the main beam positioning pin 65 can be adjusted in the front and rear and left and right directions so as to correspond to the position of the positioning hole on the main beam. Taking the adjustment gap between the first adjustment block 62 and the positioning block 63 and between the positioning block 63 and the second adjustment block 64 as an example, the number of adjustment shims used can be five, and the preferred thickness is two respectively. 1mm adjusting shim, one 0.5mm adjusting shim, one 0.3 mm adjusting shim and one 0.2mm adjusting shim, adjust the main beam positioning pin by subtracting the corresponding size adjusting shim according to different errors 65's location.

As shown in FIG. 11, in order to prevent deformation of the main beam during the welding process, an auxiliary support block 8 is also provided on the upper side of the base frame 1, and the auxiliary support block 8 is arranged between the two side pressing mechanisms 3. The auxiliary support block 8 of the embodiment of the present invention includes a first auxiliary support block 81 fixed on the upper side of the first chassis 1 and a second auxiliary support block 82 connected to the upper end of the first auxiliary support block 81 by countersunk bolts. The supporting block 81 is L-shaped, and the second auxiliary supporting block 82 is preferably a 304 steel block to prevent the main beam from being scratched.

As shown in Figures 1, 5 and 9, the embodiment of the present invention also integrates a marking machine 100. The marking machine 100 is fixed on the front side of the front plate 29 through the marking machine adapter plate 101, and the marking machine 100 is arranged on two sides. Between a pressure beam 22. A proximity switch 103 is also provided on one side of the energy absorbing box clamping mechanism 4. The proximity switch 103 is used to detect whether an energy absorbing box is inserted. The proximity switch 103 is preferably installed on the upper side of the second connecting plate 46 through a bracket. On the upper side of the pedestal 61, a bracket proximity switch 104 is also passed, and the proximity switch 104 is used to detect whether the main beam is inserted.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, other parts not specifically described belong to the prior art or common knowledge. Without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

An energy-absorbing box clamping mechanism, which is characterized in that it comprises a seat plate and two clamping jaws. The upper side of the seat plate is provided with two groups of hinge plates, and each group of hinge plates includes two hinge plates arranged oppositely. Two clamping jaws are respectively hinged between a set of hinge plates, each clamping jaw is hinged with a clamping jaw control cylinder through a connecting arm, and the clamping jaw controls the cylinder to control the rotation of the clamping jaw to loosen and clamp the energy absorbing box. The seat plate on the inner side of the clamping jaws is also provided with an energy absorbing box positioning support assembly.
The energy-absorbing box clamping mechanism according to claim 1, wherein the energy-absorbing box positioning and supporting assembly comprises an L-shaped reference block and an adjusting block bolted to the base, and the L-shaped reference block and the adjusting block bolt Connected, the upper side of the adjustment block is provided with a support block and an energy-absorbing box positioning pin, the upper end of the energy-absorbing box positioning pin is higher than the upper surface of the adjustment block, the L-shaped reference block and the two sides of the adjustment block A plurality of adjusting pads of different thicknesses are arranged between the adjusting block and the supporting block.
The energy absorbing box clamping mechanism according to claim 1, wherein the upper side of the seat plate is further provided with a mistake-proof pin.
The energy-absorbing box clamping mechanism according to claim 1, wherein 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, and the connecting arm Interspersed and arranged in the perforation.
The energy absorbing box clamping mechanism according to claim 2, wherein the adjusting block and the seat plate are both provided with a plurality of through holes, and the lower side of the seat plate is provided with an energy absorbing box lifting cylinder, and The jacking cylinder of the energy absorbing box is connected with a connecting block. The upper side of the connecting block is provided with a plurality of jacks, and each jack is inserted and arranged in a through hole. The jacking cylinder of the energy absorbing box is in a contracted state. The upper end of the ejector rod is lower than the support block, and when the energy absorbing box lifting cylinder is in the extended state, the upper end of the ejector rod is higher than the upper end of the positioning pin of the energy absorbing box.
The energy-absorbing box clamping mechanism according to claim 5, wherein the ejector rod comprises two, which are respectively arranged on both sides of the positioning pin of the energy-absorbing box.
The energy-absorbing box clamping mechanism according to claim 2, wherein the upper end of the positioning pin of the energy-absorbing box is tapered.