Automobile door and window welding clamp tool and method

Abstract

The application provides a kind of automobile door and window welding clamp tool and method, it is related to tooling technical field, including: selecting at least three welds in weld area, and any one of them is designed as reference weld;Wherein, the three welds are respectively distributed in the edge position of weld area, and the area surrounded by the three is weld area;Obtain the first coordinate information of reference weld and the second coordinate information of other two welds;Based on the first coordinate information of reference weld and the second coordinate information of other two welds, carry out trial welding operation;Obtain the third coordinate information after welding of three welds;Based on the coordinate difference value of the third coordinate information of three welds and theoretical value, obtain the fourth coordinate information of three welds;Complete door and window welding operation based on the standard coordinate system established by the fourth coordinate information.The application can avoid problems such as weld edge biting and size deviation during the welding process of vehicle door and window frame.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tooling, in particular to an automobile door and window welding fixture and method. BACKGROUND

[0002] With the development of manufacturing industry, especially the update iteration of new connection process technology, the welding process of automobile door has been changed from traditional spot welding and arc welding to laser welding, aluminum spot welding and SPR, which can greatly reduce weight and further reduce energy consumption. For laser welding of the door, in terms of welding fixture, special automatic fixture is generally used for mass production, which has high production efficiency and good part consistency. After the production line is debugged, stable production can be achieved. However, the disadvantage is that it is difficult to produce flexibly and the cost is high. Especially in the trial production field, the welding fixture structure of the supplier with laser welding capability is mostly traditional manual structure. If the quality state of the parts is unstable, the fixture needs to be adjusted constantly to ensure the fitting state of the parts, and the gaskets need to be adjusted frequently, which is time-consuming and laborious and affects the debugging efficiency.

[0003] In terms of welding method, due to the characteristics of multiple and discontinuous welds in door laser welding, simulation and offline programming need to be performed in advance for both mass production and trial production. However, the accuracy of fitting the offline program with the on-site robot workstation is greatly affected by the state of the parts, especially in the trial production process. Since the parts are soft molds, the quality state is unstable and the size does not meet the mass production level, there is a large difference between the actual state and the theoretical state. This leads to deviation of the program path after fitting the offline program with the robot workstation, and further causes quality problems such as weld edge biting and size deviation, which greatly reduces the production efficiency, prolongs the production cycle and increases the production cost.

[0004] Based on the above, there is an urgent need for a welding method for the door and window frame produced by soft film parts during the trial production stage, which avoids the problems of weld edge biting and size deviation. SUMMARY

[0005] The purpose of the present application is to provide an automobile door and window welding fixture and method, which can avoid the problems of weld edge biting and size deviation for the door and window produced by soft film parts during the trial production stage, improve the production efficiency, and the specific scheme is as follows:

[0006] An automobile door and window welding method, comprising the following steps:

[0007] Step 1: selecting at least three welds in the weld area, and designing any one of the welds as a reference weld; wherein the three welds are respectively distributed at the edge positions of the weld area, and the area surrounded by the three welds is the weld area;

[0008] Step 2: obtaining first coordinate information of the reference weld and second coordinate information of the other two welds;

[0009] Step 3: performing a trial welding operation based on the first coordinate information of the reference weld and the second coordinate information of the other two welds;

[0010] Step 4: obtaining third coordinate information of the three welds after welding;

[0011] Step 5: obtaining fourth coordinate information of the three welds based on a coordinate difference between the third coordinate information of the three welds and a theoretical value;

[0012] Step 6: completing the door and window welding operation based on a standard coordinate system established based on the fourth coordinate information.

[0013] Further, the step 1 further includes:

[0014] A welding fixture tool is used to pre-install the door inner panel and the window frame assembly;

[0015] The welding fixture tool is used to adjust the weld gap between the door inner panel and the window frame assembly until the weld gap between the door inner panel and the weld assembly meets the preset condition.

[0016] Further, the step 2 includes:

[0017] The first coordinate information of the reference weld is determined;

[0018] The coordinate difference between the reference weld and the other two welds in the theoretical coordinate system is obtained;

[0019] The second coordinate information of the other two welds is obtained based on the coordinate difference and the first coordinate information of the reference weld;

[0020] The first coordinate information and the second coordinate information are sent to the welding robot for trial welding operation.

[0021] Further, the step 5 includes:

[0022] The third coordinate information of the three welds is obtained;

[0023] The fourth coordinate information of the three welds is obtained by summing up the first coordinate information and the second coordinate information of the corresponding welds based on the coordinate difference between the third coordinate information of the three welds and a theoretical value.

[0024] Further, the step 6 includes:

[0025] A standard coordinate system is established based on the fourth coordinate information;

[0026] All fourth coordinate information of the welds in the standard coordinate system is obtained;

[0027] Based on the fourth coordinate information of all the welds, all the welds in the welding area are welded.

[0028] A car door and window welding clamp tool is applied to the car door and window welding method; it comprises a clamp floor, a plurality of clamping structures for clamping the car door inner panel assembly arranged on the upper end of the clamp floor, the car door inner panel assembly comprising a car door inner panel and a window frame assembly fixed by welding, wherein the clamping structures are evenly arranged on the circumferential side of the window frame assembly.

[0029] It also comprises a plurality of positioning and supporting structures for positioning and supporting the car door inner panel, the positioning and supporting structures being arranged on the upper end of the clamp floor, and the top of the positioning and supporting structures being inserted and matched with the car door inner panel.

[0030] Further, the clamping structure comprises a first support frame connected with the clamp floor, a first transition plate detachably connected with the first support frame, a rocker base plate arranged on both sides of the first transition plate, an upper rocker rotatably connected with the rocker base plate, a plurality of upper clamping blocks evenly arranged on the end of the upper rocker, a lower support arm connected with the upper end of the first transition plate, and a plurality of lower clamping blocks arranged on the lower support arm and corresponding to the positions of the upper clamping blocks; the upper clamping blocks and the lower clamping blocks cooperate to clamp and fix the car door inner panel assembly.

[0031] It also comprises a locking pin for locking the upper rocker and a limiting structure; the locking pin passes through the upper rocker and is screw-fixed with the locking hole on the upper end of the first transition plate; the limiting structure comprises an upper limiting block arranged on the lower end of the upper rocker and a lower limiting block arranged on the upper end of the first transition plate and capable of being in contact with the upper limiting block.

[0032] Further, a first shaft rotatably connected with the upper rocker is arranged between the rocker base plates; a stop plate is arranged at the part of the first shaft protruding out of the rocker base plate; one side of the stop plate is provided with a missing part, which is limited and clamped with an anti-rotation plate connected with the rocker base plate.

[0033] Further, a first limiting pin for limiting the rotation of the upper rocker is arranged between the two rocker base plates.

[0034] Further, the positioning and supporting structure comprises:

[0035] a second support frame connected with the clamp floor, a second transition plate detachably connected with the second support frame, an adjusting block connected with the second transition plate, an L-shaped support rod connected with the adjusting block, and a positioning part arranged at the end of the support rod; wherein the positioning part comprises a positioning pin inserted with the support rod at the lower part and a support positioning boss arranged at the middle part of the positioning pin, and the upper end of the positioning pin can be inserted and matched with the positioning hole on the car door inner panel.

[0036] Compared with the prior art, the present application has the following advantages:

[0037] The present application provides an automobile door and window welding clamp tool and method; at least three welds in the weld area are selected; one of them is taken as a reference weld, and through the first coordinate information of the reference weld and the second coordinate information of the other two welds, a trial welding operation is performed, and based on the coordinate difference value between the third coordinate information of the three welds after welding and the theoretical value, the fourth coordinate information of the three welds is obtained, and the standard coordinate system established based on the fourth coordinate information is used to complete the door and window welding operation; during the trial production stage, the problems of weld edge biting and size deviation of the door and window frame produced by the soft film part during the welding process can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 It is a flow chart of an automobile door and window welding method;

[0039] Figure 2 It is a schematic diagram of the positions of the three welds in the weld area;

[0040] Figure 3 It is a schematic diagram of the arrangement of the automobile door and window welding clamp tool on the door assembly;

[0041] Figure 4 It is a whole structure diagram of the clamping structure;

[0042] Figure 5 It is another angle structure schematic diagram of the clamping structure without the upper rocker arm;

[0043] Figure 6 It is a whole schematic diagram of the positioning support structure.

[0044] In the drawings:

[0045] 1, clamp floor;

[0046] 2, clamping structure; 20, first support frame; 21, first transition plate; 22, rocker arm base plate; 23, upper rocker arm; 24, upper clamping block; 25, lower support arm; 26, lower clamping block; 27, locking pin; 28, upper limit block; 29, lower limit block; 2A, first shaft; 2B, stop plate; 2D, anti-rotation plate; 2E, first limit pin;

[0047] 31, door inner panel; 32, window frame assembly;

[0048] 4, positioning support structure; 40, second support frame; 41, second transition plate; 42, adjustment block; 43, support rod; 44, positioning pin; 45, positioning boss;

[0049] 5, chip removal hole. DETAILED DESCRIPTION

[0050] In order to make the purposes, technical solutions and advantages of the present application clearer, the following will combine the accompanying drawings to further describe the present application in detail. Figures 1-6 It is obvious that the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0051] It should be understood that although the terms first, second, third, etc. may be adopted in the embodiments of the present application, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, without departing from the scope of the embodiments of the present application, the first can also be called the second, and similarly, the second can also be called the first.

[0052] The present application provides a car door and window welding method, comprising the following steps:

[0053] Step 1: selecting at least three welds in the weld area, and designing any one of the welds as a reference weld H1; wherein the three welds are respectively distributed at the edge positions of the weld area, and the area surrounded by the three welds is the weld area;

[0054] Step 2: obtaining the first coordinate information of the reference weld and the second coordinate information of the other two welds H2 and H3;

[0055] Step 3: performing a trial welding operation based on the first coordinate information of the reference weld and the second coordinate information of the other two welds;

[0056] Step 4: obtaining the third coordinate information of the three welds after welding;

[0057] Step 5: obtaining the fourth coordinate information of the three welds based on the coordinate difference between the third coordinate information of the three welds and the theoretical value;

[0058] Step 6: completing the door and window welding operation based on the standard coordinate system established based on the fourth coordinate information.

[0059] It can be understood that in the present application, the fourth coordinate information of the three welds is obtained, and the standard coordinate system is established based on the fourth coordinate information, and the door and window welding operation is completed; thereby avoiding the problems of weld edge biting and size deviation in the door and window frame welding process in the trial stage.

[0060] It should be noted that the overall dimensional deviation of the same batch of parts produced by the soft film part is almost consistent, therefore, the automobile door and window welding method provided by the application can ensure that the parts produced in the same batch avoid problems such as weld edge biting and dimensional deviation in the welding process by establishing a standard coordinate system; moreover, the automobile door and window welding method in the application can be used for different batches of soft film products, thereby ensuring the production efficiency in the trial production stage and reducing the production cost.

[0061] Optionally, before the step 1, it further includes:

[0062] The inner door panel and the window frame assembly are pre-installed by using a welding fixture tool;

[0063] The welding gap between the inner door panel and the window frame assembly is adjusted by using the welding fixture tool until the welding gap between the inner door panel and the window frame assembly meets the preset condition.

[0064] It can be understood that the inner door panel and the window frame assembly are pre-installed by using the welding fixture tool, and the welding gap between the inner door panel and the window frame assembly meets the preset condition, such as uniform welding and no misalignment, and at the same time, the inner door panel and the window frame assembly form a fitting state.

[0065] In the step 2, the first coordinate information of the reference weld and the second coordinate information of the other two welds are obtained, specifically including:

[0066] Step 201: determining the first coordinate information of the reference weld.

[0067] The starting position of the reference weld can be initially drawn by a weld sample, and then the welding robot is moved to the reference weld to initially determine the first coordinate information of the reference weld by using the welding robot.

[0068] Step 202: obtaining the coordinate difference value of the reference weld and the other two welds in the theoretical coordinate system.

[0069] It can be understood that the theoretical coordinate system is the theoretical coordinate system of all welds in the weld area, which can be obtained by simulation software; by obtaining the coordinate difference value of the reference weld and the other two welds in the theoretical coordinate system, and summing up the first coordinate information of the reference weld respectively, the second coordinate information of the other two welds is obtained.

[0070] Step 203: sending the first coordinate information and the second coordinate information to the welding robot for trial welding operation.

[0071] Optionally, the step 5 specifically includes:

[0072] Step 501: obtaining third coordinate information of the three welds; it can be understood that the third coordinate information is used to represent the coordinates of the three welds after welding, which is obtained by a three-coordinate measuring instrument.

[0073] Step 502: summing up the coordinate difference value between the third coordinate information of the three welds and the theoretical value with the first coordinate information and the second coordinate information of the corresponding welds respectively to obtain fourth coordinate information of the three welds; wherein the theoretical value is used to represent the theoretical coordinate value of the weld in the preset coordinate system.

[0074] Optionally, the step 6 comprises:

[0075] establishing a standard coordinate system based on the fourth coordinate information;

[0076] obtaining all fourth coordinate information of the welds in the weld area in the standard coordinate system;

[0077] completing the welding operation of all welds in the welding area based on the fourth coordinate information of all welds.

[0078] In this embodiment, the fourth coordinate information is obtained, data fitting processing is performed, a standard coordinate system is obtained, and the fourth coordinate information of all welds is obtained based on the standard coordinate system, so as to complete the welding operation of all welds.

[0079] It can be understood that in this embodiment, the first coordinate information of the reference weld is preliminarily determined by using the sample plate, and the second coordinate information of the other two welds is obtained by the coordinate difference value between the reference weld in the theoretical coordinate system and the other two welds. The first coordinate information and the second coordinate information are input into the welding robot to perform a trial welding operation, so as to obtain the third coordinate information of the weld after the trial welding. The difference value between the third coordinate information and the theoretical coordinate information is summed up with the first coordinate information and the second coordinate information of the corresponding welds respectively, so as to obtain the fourth coordinate data input into the welding robot. It can be understood that the standard data of the welding robot is obtained by the fourth coordinate data, so as to establish a standard coordinate system for the welding process of the weld area, thereby avoiding the problems of weld undercutting, size deviation and the like.

[0080] On the other hand, the application provides an automobile door and window welding jig tool, which is applied to the automobile door and window welding method; comprising: a jig floor 1; a plurality of clamping structures 2 arranged on the upper end of the jig floor 1 for clamping the door inner plate assembly; the door inner plate assembly comprises a door inner plate 31 and a window frame assembly 32 which are fixedly welded; wherein the window frame assembly 32 is arranged at the lower end of the door inner plate.

[0081] The clamping structures 2 are uniformly arranged on the circumferential side of the window frame assembly 32.

[0082] Also comprising: several positioning support structures 4 for positioning and supporting the door inner panel 31; the positioning support structures 4 are arranged on the upper end of the clamp floor 1, and the top of the positioning support structures 4 is inserted into the door inner panel 31.

[0083] It can be understood that the clamp floor 1 is used for supporting and mounting the door inner panel assembly; in use, the door inner panel 31 and the window frame assembly 32 are supported and clamped by the clamping structure 2, and the welding gap between the door inner panel 31 and the window frame assembly 32 is adjusted; the door inner panel 31 is positioned and supported by the positioning support structure 4.

[0084] Optionally, the clamping structure 2 comprises: a first support frame 20 connected with the clamp floor 1, a first transition plate 21 detachably connected with the first support frame 20, a rocker base plate 22 arranged on both sides of the first transition plate 21, an upper rocker arm 23 rotationally connected with the rocker base plate 22, upper clamping blocks 24 uniformly arranged on the end of the upper rocker arm 23, a lower support arm 25 connected with the upper end of the transition plate, and lower clamping blocks 26 arranged on the lower support arm 25 and corresponding to the positions of the upper clamping blocks 24; the upper clamping blocks 24 and the lower clamping blocks 26 cooperate to clamp and fix the door inner panel assembly.

[0085] Also comprising: a locking pin 27 for locking the upper rocker arm 23 and a limiting structure; the locking pin 27 passes through the upper rocker arm 23 and is screw-fixed with the locking hole on the upper end of the first transition plate 21; the limiting structure comprises: an upper limiting block 28 arranged on the lower end of the upper rocker arm 23, and a lower limiting block 29 arranged on the upper end of the first transition plate 21 and corresponding to the upper limiting block 28.

[0086] In use, the door inner panel assembly is clamped and fixed by the cooperation of the upper clamping blocks 24 and the lower clamping blocks 26, and further to ensure the effective progression of the workpiece and reach the use state, the upper rocker arm 23 and the first transition plate 21 are locked and fixed by the locking pin 27.

[0087] The design benefit of the limiting structure is that when the upper limiting block 28 and the lower limiting block 29 are in close contact, it indicates that the upper rocker arm 23 is rotated in place.

[0088] Specifically, adjustment shims are arranged between the upper rocker arm 23 and the upper clamping blocks 24, and between the lower support arm 25 and the lower clamping blocks 26.

[0089] Further, the upper clamping blocks 24 and the lower clamping blocks 26 are both in U-shaped structure, and a threaded hole is arranged through the front end of the upper clamping block 24; in use, the door inner panel 31 assembly is clamped by rotating the jack screw into the threaded hole, so as to adjust the welding gap between the door inner panel 31 and the window frame assembly 32.

[0090] Further, the first transition plate 21 is further provided with a chip removal hole 5 in communication with the locking hole, and the iron chips inside the locking hole can be discharged through the chip removal hole 5.

[0091] Optionally, the rocker arm base plate 22 is provided with a first shaft 2A rotatably connected with the upper rocker arm 23; one end of the first shaft 2A protrudes from the rocker arm base plate 22 and is provided with a stop plate 2B; one side of the stop plate 2B is provided with a missing part 2C which is limited and clamped with an anti-rotation plate 2D connected to the rocker arm base plate 22.

[0092] In this embodiment, the missing part 2C on the stop plate 2B is a planar structure, which is limited and clamped with the anti-rotation plate 2D, so as to prevent the first shaft 2A from rotating freely and avoid the friction loss of the first shaft 2A caused by the rotation of the upper rocker arm 23.

[0093] Optionally, the first limiting pin 2E is arranged between the two rocker arm base plates 22, and is used to limit the rotation of the upper rocker arm 23.

[0094] It should be noted that in this embodiment, the first transition plate 21 is connected and fixed with the first support frame 20 by bolts, and in actual application, the first transition plate 21 can be adapted according to the size of the workpiece, and the fixed position of the first transition plate 21 relative to the first support frame 20 can be adjusted.

[0095] Optionally, the positioning support structure 4 comprises:

[0096] The second support frame 40 connected with the fixture floor 1, the second transition plate 41 detachably connected with the second support frame 40, the adjusting block 42 connected with the second transition plate, the L-shaped support rod 43 connected with the adjusting block 42, and the positioning part 44 arranged at the end of the support rod 43; wherein the positioning part 44 comprises a positioning pin 45 inserted with the support rod 43 and a positioning boss 46 arranged at the middle part of the positioning pin 45, and the upper end of the positioning pin 45 can be inserted and matched with the positioning hole on the inner panel of the vehicle door.

[0097] The outer surface of the positioning pin is provided with threads, and when in use, the end of the support rod 43 can be fixed on the support rod 43 by screwing with the nut.

[0098] It can be understood that in this embodiment, the inner panel assembly of the vehicle door is installed above the fixture floor 1 by the cooperation of the clamping structure and the positioning support structure, and the gap of the weld between the inner panel 31 of the vehicle door and the window frame assembly 32 can be adjusted, so as to facilitate the welding operation of the welding robot.

[0099] Now, exemplary embodiments according to this application will be described in greater detail by referring to the drawings. However, these exemplary embodiments can be implemented in various different forms, and should not be construed as being limited to only the embodiments set forth herein. It should be understood that the embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, and in the drawings, the thicknesses of layers and regions can be exaggerated for clarity, and the same reference numerals are used throughout the drawings and the same elements are depicted with the same reference numerals, so that a description thereof will not be repeated.

Claims

1. A method of welding an automobile door window, characterized by, The method comprises the following steps: Step 1: select at least three welds in the weld area, and design any one of the welds as a reference weld; wherein the three welds are respectively distributed at the edge positions of the weld area, and the area surrounded by the three welds is the weld area; Step 2: obtain the first coordinate information of the reference weld and the second coordinate information of the other two welds; the step 2 comprises: determining the first coordinate information of the reference weld; obtaining the coordinate difference value of the reference weld and the other two welds in the theoretical coordinate system; obtaining the second coordinate information of the other two welds based on the coordinate difference value and the first coordinate information of the reference weld; sending the first coordinate information and the second coordinate information to the welding robot for trial welding operation; Step 3: based on the first coordinate information of the reference weld and the second coordinate information of the other two welds, trial welding operation is carried out; Step 4: obtaining the third coordinate information of the three welds after welding; Step 5: based on the coordinate difference value of the third coordinate information of the three welds and the theoretical value, the fourth coordinate information of the three welds is obtained, including: obtaining the third coordinate information of the three welds; based on the coordinate difference value of the third coordinate information of the three welds and the theoretical value, the first coordinate information and the second coordinate information of the corresponding weld are summed up respectively to obtain the fourth coordinate information of the three welds; Step 6: based on the standard coordinate system established based on the fourth coordinate information, the door and window welding operation is completed.

2. The automotive door and window welding method of claim 1, wherein, Before the step 1, it further comprises: using a welding fixture tool to preinstall the door inner plate and the window frame assembly; using a welding fixture tool to adjust the weld gap between the door inner plate and the window frame assembly until the weld gap between the door inner plate and the weld assembly meets the preset condition.

3. The automotive door and window welding method of claim 2, wherein The step 6 comprises: based on the fourth coordinate information, a standard coordinate system is established; obtaining the fourth coordinate information of all welds in the standard coordinate system; based on the fourth coordinate information of all welds, all welds in the welding area are welded.

4. The automotive door and window welding method according to any one of claims 2-3, characterized in that, The welding fixture tool comprises: a fixture floor; a plurality of clamping structures arranged on the upper end of the fixture floor for clamping the door inner plate assembly; the door inner plate assembly comprises a welded door inner plate and a window frame assembly; wherein the clamping structures are uniformly arranged on the side of the window frame assembly; It further comprises: a plurality of positioning and supporting structures for positioning and supporting the door inner plate; the positioning and supporting structures are arranged on the upper end of the fixture floor, and the top of the positioning and supporting structures can be inserted into the door inner plate.

5. The method of claim 4, wherein, The clamping structure comprises: a first support frame connected with the fixture floor, a first transition plate detachably connected with the first support frame, a rocker base plate arranged on both sides of the first transition plate, an upper rocker rotatably connected with the rocker base plate, a plurality of upper clamping blocks uniformly arranged on the end of the upper rocker, a lower support arm connected with the upper end of the first transition plate, and a plurality of lower clamping blocks arranged on the lower support arm and corresponding to the positions of the upper clamping blocks; the upper clamping blocks and the lower clamping blocks cooperate to clamp and fix the door inner plate assembly. Also include: locking pin for locking the upper rocker arm and limiting structure; the locking pin through the upper rocker arm can be with the first transition plate upper end locking hole screw fixed; the limiting structure includes: arranged in the upper rocker arm lower end of the upper limiting block and corresponding arrangement in the first transition plate upper end can be with the upper limiting block touch lower limiting block.

6. The method of claim 5, wherein, The first shaft is arranged between the rocker arm base plate and the upper rocker arm rotating connection; one end of the first shaft is arranged with a stop plate at the part of the rocker arm base plate; wherein, the stop plate side is provided with a missing part, through the missing part and the anti-rotation plate connected on the rocker arm base plate limiting clamping.

7. The method of claim 6, wherein, Two rocker arm base plate is also provided for limiting the upper rocker arm rotating first limiting pin.

8. The method of claim 4, wherein, The positioning support structure includes: The second support frame is connected with the clamp floor, the second transition plate is detachably connected with the second support frame, the adjusting block is connected with the second transition plate, the L-shaped support rod is connected with the adjusting block, and the positioning part is arranged at the end of the support rod; wherein, the positioning part includes: the positioning pin inserted with the support rod and the support positioning boss arranged in the middle of the positioning pin, wherein, the upper end of the positioning pin can be inserted with the positioning hole on the inner panel of the vehicle door to cooperate with the positioning.

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