An automatic welding workstation for vehicle pedals

Abstract

The invention discloses an automatic welding workstation for a vehicle step bar, comprising a robot welding workstation, a combined working head capable of realizing welding and floating grinding, and a step bar clamping tool; the robot welding workstation comprises a six-axis robot, an integral base, a single-axis positioner and a welding machine, wherein the six-axis robot and the single-axis positioner are installed on the integral base, the combined working head is composed of a welding gun and a grinding floating power head, and the step bar clamping tool is installed on the single-axis positioner; the invention adopts a special clamping tool to clamp the step bar firmly and stabilize the position during welding; the special clamping tool is adopted, the end head with more accurate size in the step bar is selected for positioning, and the workpiece is moved left and right, so that the repeated positioning accuracy of welding is accurate; the robot is adopted for welding, and the efficiency is greatly improved compared with manual welding; the combined working head of "floating grinding head + welding gun" is adopted, so that in the field of MIG welding, the yield rate of aluminum materials without pores and defects after welding is increased to more than 95%.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts manufacturing, in particular to an automatic welding workstation for a vehicle pedal. Background Art

[0002] At present, most of the welding work applied to automobile pedals is done by manual welding or welding with simple equipment.

[0003] The current welding process has the following disadvantages: low welding efficiency, especially due to the particularity of the aluminum pedal material, it is easy to have defects such as pores when the weld is smoothed after welding. Summary of the invention

[0004] The purpose of the present invention is to provide an automatic welding workstation for a vehicle footrest to solve the problems existing in the above-mentioned prior art, and to solve the technical problems that the existing welding process has low welding efficiency and defects such as pores are prone to occur after the aluminum material is welded and smoothed.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides an automatic welding workstation for a vehicle step bar, comprising a robot welding workstation, a combined working head capable of realizing welding and floating grinding, and a step bar clamping tool;

[0007] The robot welding workstation comprises a six-axis robot, an integral base, a single-axis positioner and a welding machine, wherein the six-axis robot and the single-axis positioner are mounted on the integral base, the combined working head comprises a welding gun and a grinding floating power head connected by an L-shaped gripper, the welding machine and the combined working head cooperate with the six-axis robot through a circuit integration system, and the pedal clamping tooling is interconnected with the robot welding workstation through a circuit integration system;

[0008] The pedal clamping tool comprises a clamping tool base, a clamping tool positioning cylinder, a slide rail, multiple slide blocks, two cylinder support seats, two side clamping cylinders, a rear clamping cylinder, two upper pressing cylinders, a left end clamping seat, a right end clamping seat and two end positioning frames. The clamping tool base is installed on the single-axis positioner. The slide rail is arranged on the top of the clamping tool base, and multiple slide blocks are slidably connected to the slide rail. The two cylinder support seats are relatively arranged on both sides of the slide rail and are arranged on the top of the slide block to achieve follow-up with the slide block. A side clamping cylinder is respectively arranged on the same side of the two cylinder support seats, and a cylinder positioning block is respectively arranged on the other same side of the two cylinder support seats. The cylinder positioning block is connected to the side clamping cylinder The cylinders are arranged relatively to each other, and the rear clamping cylinder is arranged at the end of the cylinder support seat on the right side, and an upper clamping cylinder is respectively arranged on the top of the two cylinder support seats, and an upper clamping plate is respectively arranged on the two upper clamping cylinders, the left end clamping seat is arranged at the end of the cylinder support seat on the left side, and the right end clamping seat is arranged on the rear clamping cylinder, and the two end positioning frames are respectively arranged on the top of the ends of the two cylinder support seats, and the clamping tool positioning cylinder is arranged on the clamping tool base for pushing and pulling back the cylinder support seat on the left side, and a left welding positioning seat is also arranged on the clamping working base on the left side of the cylinder support seat on the left side, and a right welding positioning seat is also arranged on the clamping tool base on the right side of the cylinder support seat on the right side.

[0009] Preferably, two sliding blocks are arranged at the bottom of each cylinder support seat.

[0010] Preferably, the end positioning frame is provided with a protruding structure that matches the end of the pedal bar, and the end positioning frame is also provided with an end pop-up device.

[0011] Preferably, two groups of the single-axis positioners are provided, which are respectively arranged on both sides of the six-axis robot, and a group of the pedal clamping tooling is installed on each group of the single-axis positioners.

[0012] Compared with the prior art, the present invention has achieved the following beneficial technical effects:

[0013] The automatic welding workstation for vehicle footbars provided by the present invention adopts a special clamping tool to clamp the footbar firmly and keep it in a stable position during welding; the special clamping tool is adopted, and the end of the footbar with more accurate size is selected for positioning, and the workpiece is moved left and right, so that the repeated positioning accuracy of welding is accurate; a robot is adopted for welding, and the efficiency is greatly improved compared with manual welding; a combined working head of "floating grinding head + welding gun" is adopted, so that in the field of MIG welding, the yield rate of aluminum materials without pores and defects after welding is increased to more than 95%. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a front view of the automatic welding workstation for vehicle pedal bars in the present invention;

[0016] Figure 2 It is a top view of the automatic welding workstation for vehicle pedal bars in the present invention;

[0017] Figure 3 A three-dimensional diagram of the automatic welding workstation for vehicle step bars in the present invention;

[0018] Figure 4 It is a front view of the step bar clamping tool in the present invention;

[0019] Figure 5 for Figure 4 A top view of

[0020] Figure 6 for Figure 5 A partial enlarged view of the cylinder support seat on the left side of the center;

[0021] Figure 7 It is a structural schematic diagram of the combined working head in the present invention;

[0022] Figure 8 It is a structural schematic diagram of the end positioning frame in the present invention;

[0023] Fig. 9 It is an assembly diagram of the end head and the pedal cylinder body in the present invention;

[0024] In the figure: 1-six-axis robot, 2-single-axis positioner, 3-integral base, 4-welding machine, 5-welding gun, 6-grinding floating power head, 7-clamping tool base, 8-clamping tool positioning cylinder, 9-side clamping cylinder, 10-rear clamping cylinder, 11-upper clamping cylinder, 12-pedal lever end left, 13-pedal lever body, 14-pedal lever end right, 15-lever body positioning block, 16-end positioning frame, 17-end pop-up device, 18-upper clamping plate, 19-left welding positioning seat, 20-end left close seat, 21-combined working head, 22-L-type holder, 23-lever body support seat, 24-slider, 25-slide rail, 26-end right clamping seat, 27-right welding positioning seat, 28-raised structure, 29-threaded end plug, 30-spring. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The purpose of the present invention is to provide an automatic welding workstation for a vehicle pedal bar to solve the problems existing in the prior art.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] The vehicle step bar automatic welding workstation in this embodiment is as follows: Figure 1-7 As shown, it includes a robot welding workstation, a combined work head 21 capable of welding and floating grinding, and a pedal clamping tool;

[0029] The robot welding workstation includes a six-axis robot 1, an integral base 3, a single-axis positioner 2 and a welding machine 4, wherein the six-axis robot 1 and the single-axis positioner 2 are installed on the integral base 3, the combined working head 21 includes a welding gun 5 and a grinding floating power head 6 connected by an L-shaped gripper 22, the welding machine 4 and the combined working head 21 cooperate with the six-axis robot 1 through a circuit integration system, and the pedal clamping tooling is interconnected with the robot welding workstation through the circuit integration system to achieve the effects of automatic clamping, positioning, moving, welding bead grinding and welding;

[0030] The pedal bar clamping tool comprises a clamping tool base 7, a clamping tool positioning cylinder 8, a slide rail 25, a plurality of slide blocks 24, two cylinder support seats 23, two side clamping cylinders 9, a rear clamping cylinder 10, two upper pressing cylinders 11, a terminal left clamping seat 20, a terminal right clamping seat 26 and two terminal positioning frames 16. The clamping tool base 7 is installed on the single-axis positioner 2, so that the pedal bar clamping tool can rotate with the single-axis positioner 2 and the welded workpiece can move left and right, so that the robot can perform all-round welding;

[0031] The slide rail 25 is arranged on the top of the clamping tooling base 7, and multiple sliders 24 are slidably connected to the slide rail 25. The two cylinder support seats 23 are relatively arranged on both sides of the slide rail 25 and are arranged on the top of the slider 24 to achieve follow-up with the slider 24. The same side of the two cylinder support seats 23 is respectively provided with a side clamping cylinder 9, and the same other side of the two cylinder support seats 23 is respectively provided with a cylinder positioning block 15. The cylinder positioning block 15 is arranged opposite to the side clamping cylinder 9. The end of the cylinder support seat 23 on the right side is provided with a rear clamping cylinder 10. The tops of the two cylinder support seats 23 are respectively provided with an upper clamping cylinder 11, and the two upper clamping cylinders 11 are respectively provided. An upper clamping plate 18 is respectively provided on the tightening cylinder 11, the left end clamping seat 20 is provided at the end of the cylinder support seat 23 on the left side, the right end clamping seat 26 is provided on the rear clamping cylinder 10, and the two end positioning frames 16 are respectively provided at the top of the ends of the two cylinder support seats 23 for positioning and installing the pedal end. The clamping tool positioning cylinder 8 is provided on the clamping tool base 7 for pushing and pulling back the cylinder support seat 23 on the left side. A left welding positioning seat 19 is also provided on the clamping working base on the left side of the cylinder support seat 23 on the left side, and a right welding positioning seat 27 is also provided on the clamping tool base 7 on the right side of the cylinder support seat 23 on the right side.

[0032] In this specific embodiment, two slide blocks 24 are provided at the bottom of each cylinder support seat 23. Two groups of single-axis positioners are provided, which are respectively provided on both sides of the six-axis robot 1, and a group of pedal clamping tooling is installed on each group of single-axis positioners.

[0033] like Figure 8 As shown, the end positioning frame 16 is provided with a protruding structure 28 that matches the end of the pedal bar, and the end positioning frame 16 is also provided with an end pop-up device 17, a threaded end plug 29 is fixed on the end positioning frame 16, and a spring 30 is placed above the threaded end plug 29, and at the same time, the spring 30 is placed below the end pop-up device 17, so as to pop up the end pop-up device 17. The groove of the pedal bar end is stuck on the protruding structure 28, so as to realize the left and right positioning of the pedal bar end, and the end pop-up device 17 pops up the tail of the pedal bar end.

[0034] The vehicle step bar automatic welding workstation provided by the present invention has two working processes:

[0035] Working process 1 is:

[0036] When working, first Figure 2The pedal bar cylinder body 13 is placed on the bar body support seat 23, and then the left pedal bar end 12 and the right pedal bar end 14 are placed on two end positioning frames 16. The groove of the end itself cooperates with the protruding structure 28 of the end positioning frame so that the end cannot move left and right. The pedal bar cylinder body 13 is milled in the early stage, leaving a small plane at the left and right ends, which can just place the end under the small plane. At this time, the end pop-up device 17 on the end positioning frame 16 makes the end bounce slightly, and the upper plane of the end is in seamless contact with the small plane of the pedal bar cylinder body 13, so that the end is positioned by the upper plane, and the seamless contact makes the pedal bar cylinder body 13 is very strong and very beautiful; then the rear clamping cylinder 10 is clamped, so that the left end of the pedal bar 12 is close to the left end clamping seat 20, and the right end clamping seat 26 is clamped with the right end of the pedal bar 14, and then the side clamping cylinder 9 is clamped, so that the pedal bar cylinder body 13 is close to the two bar body positioning blocks 15, and then the two upper clamping cylinders 11 drive the two upper clamping plates 18 to clamp, and the two upper clamping plates 18 are pressed to the pedal bar cylinder body 13 and the left end of the pedal bar 12 and the right end of the pedal bar 14 at the same time, so that the pedal bar cylinder body 13 and the left end of the pedal bar 12 and the right end of the pedal bar 14 are flatly docked, and the upper plane positioning of the end is used, such as Fig. 9 shown.

[0037] Then the clamping tool positioning cylinder 8 is pushed out, so that the clamped pedal cylinder body 13 contacts the left welding positioning seat 19 through the left end clamping seat 20. At this time, the clamping tool base 7 and the clamped pedal cylinder body 13 are rotated as a whole along with the single-axis positioner 2. After the weld to be welded of the pedal cylinder body 13 is turned to a reasonable position, the six-axis robot 1 first drives the grinding floating power head 6 to move to the left weld 12 of the pedal end through the circuit integration system, and grinds the aluminum oxide scale, incidental impurities, oil stains, etc. on the surface of the weld. After the grinding is completed, the six-axis robot 1 drives the welding gun 5 to move to the weld position through the circuit integration system, and completes the welding of the left weld 12 of the pedal end through the welding machine 4.

[0038] After welding is completed, the clamping tool positioning cylinder 8 continues to work, so that the clamped pedal cylinder body 13 contacts the right welding positioning seat 27 through the right clamping seat 26 at the end. At this time, the clamping tool base 7 continues to rotate with the clamped pedal cylinder body 13 along with the single-axis positioner 2, and then the weld of the aluminum pedal to be welded is turned to a reasonable position. The six-axis robot 1 drives the grinding floating power head 6 to move to the right weld 14 at the end of the pedal through the circuit integration system, and grinds the aluminum oxide scale, incidental impurities, oil stains, etc. on the surface of the weld. After grinding is completed, the six-axis robot 1 drives the welding gun 4 to move to the weld position through the circuit integration system, and completes the welding of the right weld 14 at the end of the pedal through the welding machine 4.

[0039] At this time, the welding of the entire aluminum step bar is completed, and after the clamping tool positioning cylinder 8 returns to the middle position, all the clamping cylinders are opened to take out the welded aluminum step bar.

[0040] At the same time, there are two single-axis positioners 2 in the workstation, each of which is equipped with two sets of pedal clamping tooling, namely station A and station B. When the robot is welding at station A, the loading and clamping work of the pedal cylinder 13, the left pedal end 12, and the right pedal end 14 is carried out at station B at the same time. After the welding of station A is completed, the welding of station B can be carried out directly. At the same time, when welding at station B, the unloading and loading clamping work of station A can be completed, which is cyclical, saving the time of loading and unloading, so that the robot can weld continuously without stopping.

[0041] After the weld is completed at this time, not only the efficiency of manual welding is greatly improved, but also after the weld is smoothed, the yield rate without pores and defects is basically above 95%.

[0042] The second working process is:

[0043] When working, first Figure 2 The pedal bar cylinder body 13 is placed on the bar body support seat 23, and then the left pedal bar end 12 and the right pedal bar end 14 are placed on two end positioning frames 16, and the grooves of the ends themselves cooperate with the raised structures 28 of the positioning frames, so that the ends cannot move left and right; and the pedal bar cylinder body 13 is milled in the early stage, leaving a small plane at the left and right ends, which can just place the end under the small plane. At this time, the end pop-up device 17 on the end positioning frame 16 makes the end bounce slightly, and the upper plane of the end is in seamless contact with the small plane of the pedal bar cylinder body 13, so that the end is positioned by the upper plane, and the seamless contact makes the pedal bar cylinder body 13 is very strong and very beautiful; then the rear clamping cylinder 10 is clamped, so that the left end 12 of the pedal bar is close to the left clamping seat 20 of the end, and at the same time, the right clamping seat 26 of the end is clamped with the right end 14 of the pedal bar, and then the side clamping cylinder 9 is clamped, so that the pedal bar cylinder body 13 is close to the two bar body positioning blocks 15, and then the two upper clamping cylinders 11 drive the two upper clamping plates 18 to clamp, and the two upper clamping plates 18 are pressed to the pedal bar cylinder body 13 and the left end 12 of the pedal bar and the right end 14 of the pedal bar at the same time, so that the pedal bar cylinder body 13 and the left end 12 of the pedal bar and the right end 14 of the pedal bar are flatly docked, and the upper plane positioning of the end is used.

[0044] Then the aluminum pedal clamping tooling positioning cylinder 8 is pushed out, so that the clamped pedal cylinder body 13 contacts the left welding positioning seat 19 through the left end abutment seat 20. At this time, the clamping tooling base 7 rotates with the clamped pedal cylinder body 13 along with the single-axis positioner 2. After the weld of the aluminum pedal to be welded is turned to a reasonable position, the six-axis robot 1 drives the welding gun 5 to move to the weld position through the circuit integration system, and completes the welding of the left weld 12 of the aluminum pedal end through the welding machine 4.

[0045] After welding is completed, the aluminum pedal clamping tooling positioning cylinder 8 continues to work, so that the clamped pedal cylinder body 13 contacts the right welding positioning seat 27 through the right clamping seat 26 at the end. At this time, the clamping tooling base 7 continues to rotate with the clamped pedal cylinder body 13 along with the single-axis positioner 2, and then the weld of the aluminum pedal to be welded is turned to a reasonable position. The six-axis robot 1 drives the welding gun 4 to move to the weld position through the circuit integration system, and completes the welding of the right weld 14 of the aluminum pedal end through the welding machine 4.

[0046] At this time, the welding of the entire aluminum step bar is completed. After the aluminum step bar clamping tool positioning cylinder 8 returns to the middle position, all the clamping cylinders are opened to take out the welded aluminum step bar.

[0047] At the same time, there are two single-axis positioners 2 in the workstation, each of which is equipped with two sets of aluminum pedal clamping tooling, namely station A and station B. When the robot is welding at station A, the loading and clamping work of the aluminum pedal body 13, the left end 12 of the aluminum pedal, and the right end 14 of the aluminum pedal is carried out at station B at the same time. After the welding of station A is completed, the welding of station B can be carried out directly. At the same time, when welding at station B, the unloading and loading clamping work of station A can be completed, which is cyclical, saving the time of loading and unloading, so that the robot can weld continuously without stopping.

[0048] After the weld is completed at this time, the efficiency of manual welding is greatly improved.

[0049] The main difference between process one and process two is that process one adds a step of grinding the aluminum oxide scale, incidental impurities and oil stains on the weld surface with the floating power head, so that the workpiece surface is free of impurities before welding, and there is no pore defect on the surface after the weld is smoothed after welding. Process two can accept welding with pore defects after the weld is smoothed, which saves the work of grinding the floating power head.

[0050] In the present invention, the pedal clamping tool is connected to two sets of single-axis positioners 2, so that the clamping and positioning tool can rotate with the single-axis positioner 2 and the welded workpiece can move left and right, so that the robot can perform omnidirectional welding.

[0051] Furthermore, the pedal clamping tooling uses a cylinder for clamping, and a three-position cylinder is used, so that the workpiece can be moved as needed during welding, and the end with more accurate size is used as the positioning reference, which ultimately makes the robot welding repeatable positioning accurate and facilitates welding.

[0052] Furthermore, since aluminum is extremely easy to oxidize and is easily accompanied by other impurities and oil stains during the circulation process, which is one of the main reasons for welding defects during welding, the robot welding workstation and the six-axis robot 1 grab the combined working head of "welding gun + floating grinding head", so that before welding, the workstation can grind off the oxide scale, accompanying impurities, oil stains, etc. on the outer surface of the pedal weld according to needs, and then weld, so as to solve defects such as pores in welding.

[0053] Furthermore, the robot welding station has two groups of single-axis positioners 2, and the two groups of single-axis positioners 2 form two workstations A and B, so that while the robot is welding at workstation A, workstation B can carry out material loading and unloading. After the robot completes welding at workstation A, workstation B directly clamps and starts welding. At this time, workstation A can carry out material loading and unloading, and this cycle is repeated, realizing the function of the robot's non-stop operation.

[0054] Furthermore, the robot welding station and the pedal clamping tooling are integrated together by a circuit integration system to achieve intercommunication and mutual collaborative operation.

[0055] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An automatic welding workstation for vehicle pedals, characterized in that: It includes a robot welding workstation, a combined work head capable of welding and floating grinding, and a pedal clamping tooling; The robot welding workstation comprises a six-axis robot, an integral base, a single-axis positioner and a welding machine, wherein the six-axis robot and the single-axis positioner are mounted on the integral base, the combined working head comprises a welding gun and a grinding floating power head connected by an L-shaped gripper, the welding machine and the combined working head cooperate with the six-axis robot through a circuit integration system, and the pedal clamping tooling is interconnected with the robot welding workstation through a circuit integration system; The pedal clamping tool comprises a clamping tool base, a clamping tool positioning cylinder, a slide rail, multiple slide blocks, two cylinder support seats, two side clamping cylinders, a rear clamping cylinder, two upper pressing cylinders, a left end clamping seat, a right end clamping seat and two end positioning frames. The clamping tool base is installed on the single-axis positioner. The slide rail is arranged on the top of the clamping tool base, and multiple slide blocks are slidably connected to the slide rail. The two cylinder support seats are relatively arranged on both sides of the slide rail and are arranged on the top of the slide block to achieve follow-up with the slide block. A side clamping cylinder is respectively arranged on the same side of the two cylinder support seats, and a cylinder positioning block is respectively arranged on the other same side of the two cylinder support seats. The cylinder positioning block is connected to the side clamping cylinder The cylinders are arranged relatively to each other, and the rear clamping cylinder is arranged at the end of the cylinder support seat on the right side, and an upper clamping cylinder is respectively arranged on the top of the two cylinder support seats, and an upper clamping plate is respectively arranged on the two upper clamping cylinders, the left end clamping seat is arranged at the end of the cylinder support seat on the left side, and the right end clamping seat is arranged on the rear clamping cylinder, and the two end positioning frames are respectively arranged on the top of the ends of the two cylinder support seats, and the clamping tool positioning cylinder is arranged on the clamping tool base for pushing and pulling back the cylinder support seat on the left side, and a left welding positioning seat is also arranged on the clamping tool base on the left side of the cylinder support seat on the left side, and a right welding positioning seat is also arranged on the clamping tool base on the right side of the cylinder support seat on the right side.

2. The vehicle step bar automatic welding workstation according to claim 1 is characterized in that: Two sliding blocks are arranged at the bottom of each cylinder support seat.

3. The vehicle step bar automatic welding workstation according to claim 1 is characterized in that: The end positioning frame is provided with a protruding structure matching the end of the pedal bar, and the end positioning frame is also provided with an end pop-up device.

4. The vehicle step bar automatic welding workstation according to claim 1 is characterized in that: The single-axis positioners are provided in two groups, which are respectively arranged on both sides of the six-axis robot, and each group of the single-axis positioners is installed with a group of the pedal clamping tooling.

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