Welding tool and welding system for automobile door hinge reinforcing plate

Abstract

The invention relates to an automobile door hinge reinforcing plate welding tool and welding system, the welding system comprises a multi-pulse welding machine and further comprises a moving assembly matched with a base station to achieve two-degree-of-freedom movement of the base station, and the base station is further provided with a die repairing assembly. A traditional copper plate is replaced with the tungsten plate, the tungsten plate is high in melting point, meanwhile, stable electric arcs can be provided, heat is concentrated in the welding process, deformation is small, and the conditions of insufficient welding and welding deformation can be effectively improved. A left automobile door hinge and a right automobile door hinge can be matched through a positioning pin and a limiting bolt in the fixing assembly and an extending part in the supporting assembly, multiple sets of equipment do not need to be used for machining in a matched mode, the machining takt is reduced, the machining efficiency is improved, fool proofing can be conducted in the using process, and machining errors are prevented.

Description

Technical Field

[0001] This invention relates to the field of automotive parts processing, specifically to welding fixtures and welding systems for automotive door hinge reinforcement plates. Background Technology

[0002] Automotive door hinges are crucial connecting components between car doors and the car body. With the development of new energy vehicles, the vehicle's weight is increasing, and collision standards are also rising. To ensure that car doors can still open and close normally after an impact, reinforced versions of automotive door hinges are used for reinforcement. Simultaneously, the requirements for rust prevention on the car body are stringent. Since the automotive door hinges are made of galvanized steel, grinding or other subsequent operations cannot be performed after welding the reinforced version to the original hinge to prevent damage to the galvanized layer and subsequent rusting. Existing welding methods use copper plates for the contact area with the hinge, which is prone to incomplete welds and excessively high welding temperatures that can cause deformation at the weld joint, affecting subsequent installation. To address the issues of incomplete welds and post-weld deformation, a welding fixture and system for automotive door hinge reinforcement plates have been designed and developed. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention proposes a welding fixture and system for reinforcing automotive door hinge plates. The technical problem to be solved by this invention is achieved through the following technical solution:

[0004] Welding fixture for automotive door hinge reinforcement plates, including

[0005] abutment;

[0006] Welding table, used to fix the car door hinge and the car door hinge reinforcement plate;

[0007] Positioning seats, located in the middle of the welding table, are used to position the reinforcing plate that is connected to the car door hinge.

[0008] A tungsten metal plate is placed in the middle of the positioning seat and is attached to the bottom surface of the car door hinge.

[0009] A positioning component, mounted on a tungsten metal plate, is used to position the automotive door hinge reinforcement plate;

[0010] The first buffer assembly is located between the base and the welding table to buffer the impact of the multi-pulse welding machine on the welding table.

[0011] A fixing component, mounted on the welding table, is used to press the automotive door hinge reinforcement plate firmly.

[0012] The support components are set on the welding table and are respectively attached to the back of the left and right door hinges to support the left and right door hinges respectively.

[0013] The first buffer assembly includes a first guide post that cooperates with the base, and a first shock-absorbing spring is fitted on the first guide post.

[0014] The positioning component includes a positioning pin disposed on a tungsten metal plate, and the positioning component also includes two positioning holes disposed parallel to each other along the length of the tungsten metal plate. The positioning holes are provided with limiting bolts that respectively cooperate with the left and right door hinges to fix the relative positions of the door hinge reinforcement plate and the car door hinge.

[0015] The fixing component includes a cylinder mounted on a welding table, the cylinder having a pressure plate that presses the door hinge reinforcement plate tightly.

[0016] The support assembly includes a support platform mounted on a welding platform. The top of the support platform has an inclined surface that fits against the back of the car door hinge. An extension with a triangular cross-section is provided on the inclined surface, which is perpendicular to the inclined surface.

[0017] The automotive door hinge reinforcement plate welding system includes a multi-pulse welding machine and a moving component that cooperates with a base to achieve two degrees of freedom of movement of the base. The base is also provided with a mold repair component.

[0018] The moving component includes a support frame connected to a multi-pulse welding machine, a moving stage on the support frame, and a base mounted on the moving stage. The moving component also includes a first linear motion component on the support frame and a second linear motion component on the moving stage. The first linear motion component drives the moving stage to move in a horizontal direction, and the second linear motion component drives the base to move in a direction perpendicular to the horizontal direction.

[0019] The mold repair assembly includes a mold repair table set on a base, a mold repair machine on the mold repair table, and a second buffer assembly between the mold repair machine and the mold repair table. The second buffer assembly includes a second guide post that cooperates with the mold repair machine and the mold repair table, and a second shock-absorbing spring is provided on the second guide post.

[0020] The base is provided with a clearance area, and the lower electrode of the multi-pulse welding machine is distributed within the clearance area.

[0021] The beneficial effects of this invention are as follows: This invention replaces the traditional copper plate with a tungsten plate. Tungsten plates have a high melting point and can provide a stable electric arc, resulting in concentrated heat and minimal deformation during welding, effectively improving the problems of incomplete welds and welding deformation. This invention, through the positioning pins and limiting bolts in the fixing assembly and the extension in the support assembly, can adapt to both left and right car door hinges, eliminating the need for multiple sets of equipment for processing, reducing processing time, improving processing efficiency, and also providing error-proofing during use. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a three-dimensional structural diagram of the welding system of the present invention;

[0024] Figure 2 This is a schematic diagram of the three-dimensional structure of the welding fixture of the present invention. Figure 1 ;

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure of the welding fixture of the present invention. Figure 2 ;

[0026] Figure 4 This is a schematic diagram of the three-dimensional structure of the positioning component of the present invention. Figure 1 ;

[0027] Figure 5 This is a schematic diagram of the three-dimensional structure of the positioning component of the present invention. Figure 2 ;

[0028] Figure 6 This is a schematic diagram of the three-dimensional structure of the positioning component of the present invention. Figure 3 ;

[0029] Figure 7 This is a schematic diagram of the three-dimensional structure of the automotive door hinge of the present invention. Figure 1 ;

[0030] Figure 8 This is a schematic diagram of the three-dimensional structure of the automotive door hinge of the present invention. Figure 2 ;

[0031] Figure 9 For the present invention Figure 2 A magnified view of I;

[0032] Figure 10 This is a photograph of the finished product of the present invention, which uses copper plate welding.

[0033] Figure 11 A photograph of the finished copper plate welded according to the present invention after polishing;

[0034] Figure 12 This is a photograph of a poorly welded copper plate from the present invention.

[0035] Figure 13 This is a photograph of the finished product of the present invention, which is welded using tungsten metal plates;

[0036] Figure 14 This is a cross-sectional view of the finished product of the present invention, which is welded using tungsten metal plates.

[0037] The diagram shows: 1. Base; 2. Welding table; 3. Buffer assembly 1; 4. Positioning seat; 5. Tungsten plate; 6. Positioning assembly; 7. Support assembly; 8. Multi-pulse welding machine; 9. Moving assembly; 10. Mold repair assembly; 11. Clearance area; 12. Lower electrode; 13. Fixing assembly; 14. Mounting hole 2; 15. Mounting hole 3; 16. Mounting hole 1; 31. Guide post 1; 32. Shock-absorbing spring 1; 61. Positioning pin; 62. Positioning hole; 63. Limit bolt; 71. Support platform; 72. Inclined surface; 73. Extension; 91. Support frame; 92. Moving table; 93. First linear motion assembly; 94. Second linear motion assembly; 101. Mold repair table; 102. Mold repair machine; 103. Buffer assembly 2; 104. Guide post 2; 105. Shock-absorbing spring 2; 131. Cylinder; 132. Pressure plate. Detailed Implementation

[0038] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be described more clearly and completely below with reference to the accompanying drawings in the embodiments. Of course, the described embodiments are only a part of the present invention and not all of it. Based on this embodiment, other embodiments obtained by those skilled in the art without creative effort are all within the protection scope of the present invention.

[0039] like Figures 1 to 9 As shown, the welding fixture for the automotive door hinge reinforcement plate includes...

[0040] Abutment 1;

[0041] Welding table 2 is used to fix the car door hinge and the door hinge reinforcement plate;

[0042] Positioning seat 4 is located in the middle of welding table 2 and is used to position the door hinge reinforcement plate.

[0043] A tungsten plate 5 is positioned in the center of the positioning seat 4 and adheres to the bottom surface of the automotive door hinge. In existing technologies, a copper plate is typically used, positioned on the positioning seat 4 and in contact with the part to be welded. Copper plates have better electrical and thermal conductivity than tungsten plates, which can easily lead to excessively high welding temperatures during the welding process, causing deformation. Due to the corrosion requirements of automotive doors, the hinges are made of galvanized sheet metal, which cannot be reshaped or have its coating damaged. Excessive deformation results in scrapped parts, leading to low production yield. High welding temperatures with copper plates result in short welding times, easily causing incomplete welds. Secondary welding affects the product's appearance, requiring grinding and reshaping. Due to corrosion requirements, grinding cannot damage the galvanized layer of the automotive door hinge; therefore, incomplete welds result in direct scrapping. Replacing the copper plate with a tungsten plate 5 utilizes the high melting point of tungsten, which provides a stable arc. This concentrates heat during welding, resulting in less deformation and effectively improving the problems of incomplete welds and welding deformation. Figures 10 to 13The image shows a comparison example of copper plate welding and tungsten plate welding. Figure 10 neutralization Figure 12 As can be seen, when using copper plates for welding, if flatness is desired, incomplete soldering may occur; if a strong weld is desired, significant deformation may occur at the weld joint, requiring grinding. Figure 11 As shown, the galvanized layer of the car door hinge was completely destroyed after grinding, failing to meet the requirements for corrosion protection; as Figure 13 As shown, after welding with tungsten metal plate 5, the weld joints are smooth and without obvious deformation; as Figure 14 As shown, a cross-section of the car door hinge welded with tungsten metal plate 5 reveals that the car door hinge reinforcement plate and the car door hinge are completely welded and cannot be separated, with no signs of incomplete welding.

[0044] Positioning component 6 is set on metal tungsten plate 5 to position the car door hinge reinforcement plate;

[0045] The first buffer assembly 3 is set between the base 1 and the welding table 2 to buffer the impact of the multi-pulse welding machine on the welding table 2;

[0046] The fixing component 13 is set on the welding table 2. The support component 7 is set on the welding table 2 and is respectively attached to the back of the left and right door hinges to support the left and right door hinges respectively.

[0047] The first buffer assembly 3 includes a first guide post 31 that cooperates with the base 1. A first shock-absorbing spring 32 is fitted on the first guide post 31. During the welding process, the auxiliary structure of the multi-pulse welding machine 8 may collide with the base 1. The first shock-absorbing spring 32 reduces the impact force of the multi-pulse welding machine 8 on the base 1 and protects the base 1.

[0048] The positioning component 6 includes a positioning pin 61 disposed on the tungsten plate 5, and further includes two positioning holes 62 arranged parallel to each other along the length of the tungsten plate 5. Each positioning hole 62 contains a limiting bolt 63 that respectively cooperates with the left and right door hinges to fix the relative positions of the door hinge reinforcement plate and the car door hinge. Figures 4 to 8 As shown, the positioning pin 61 engages with the first mounting hole 16 in the middle of the car door hinge reinforcement plate. At the same time, the car door hinge reinforcement plate has two second mounting holes 14 that engage with the limiting bolts 63. Each of the left and right car door hinges has a third mounting hole 15 and a corresponding second mounting hole 14. The relative positions of the car door hinge and the car door hinge reinforcement plate are fixed by the engagement of the limiting bolts 63 with the corresponding second mounting holes 14 and third mounting holes 15. The two second mounting holes 14 on the car door hinge reinforcement plate can directly fit the left and right car door hinges without distinguishing between the left and right sides of the car door hinge reinforcement plate, reducing the welding scrap caused by incorrect parts handling.

[0049] The fixing assembly 13 includes a cylinder 131 mounted on the welding table 2, and the cylinder 131 is provided with a pressure plate 132 for pressing the door hinge reinforcing plate; as Figures 4 to 5 As shown, two pressure plates 132 are arranged horizontally with an L-shaped cross-section to press the two sides of the car door hinge reinforcement plate tightly, preventing gaps between the car door hinge and the car door hinge reinforcement plate, which could lead to incomplete welding during welding. The L-shaped cross-section of the pressure plate 132 is used to avoid obstructing the car door hinge. Two cylinders 131 are provided and connected to the corresponding pressure plates 132.

[0050] The support assembly 7 includes a platform 71 mounted on the welding table 2. The top of the platform 71 has an inclined surface 72 that conforms to the back of the car door hinge. An extension 73 with a triangular cross-section, perpendicular to the inclined surface 72, is provided on the inclined surface 72. Figures 4 to 5 As shown, the inclined surface 72 fits into the end of the car door hinge, and the inclined portion of the extension 73 fits into the inclined portion of the corresponding left and right car door hinges, ensuring the position of the left and right car door hinges and preventing the left and right car door hinges from being taken out incorrectly. At the same time, the extension 73 can be adapted to the left and right car door hinges, eliminating the need to design and develop a second set of equipment.

[0051] The automotive door hinge reinforcement plate welding system includes a multi-pulse welding machine 8, and a moving component 9 that cooperates with a base 1 to realize two degrees of freedom of movement of the base 1. The base 1 is also provided with a mold repair component 10.

[0052] The moving component 9 includes a support frame 91 connected to a multi-pulse welding machine 8. A moving stage 92 is mounted on the support frame 91, and the base 1 is mounted on the moving stage 92. The moving component 9 also includes a first linear motion component 93 mounted on the support frame 91 and a second linear motion component 94 mounted on the moving stage 92. The first linear motion component 93 drives the moving stage 92 to move horizontally, and the second linear motion component 94 drives the base 1 to move perpendicular to the horizontal direction. The first linear motion component 93 and the second linear motion component 94 can be a lead screw mechanism, a rack and pinion mechanism, or other mechanisms capable of linear motion. Two degrees of freedom of motion are achieved through the first linear motion component 93 and the second linear motion component 94 to weld the four ends of the automotive door hinge reinforcement plate, thus connecting the automotive door hinge reinforcement plate and the automotive door hinge.

[0053] The mold repair assembly 10 includes a mold repair table 101 mounted on a base 1. A mold repair machine 102 is mounted on the mold repair table 101. A second buffer assembly 103 is provided between the mold repair machine 102 and the mold repair table 101. The second buffer assembly 103 includes a second guide post 104 that cooperates with the mold repair machine 102 and the mold repair table 101. A second shock-absorbing spring 105 is provided on the second guide post 104. The upper electrode of the multi-pulse welding machine 8 is prone to deformation after multiple welding operations, affecting the welding quality. The first linear motion assembly 93 and the second linear motion assembly 94 cooperate to move the mold repair table 101 to below the upper electrode of the multi-pulse welding machine 8. The upper electrode of the multi-pulse welding machine 8 descends into the mold repair machine 102 for reshaping, ensuring the welding quality. The second shock-absorbing spring 105 is used to buffer the impact force on the mold repair table 101 when the multi-pulse welding machine 8 enters the mold repair machine 102.

[0054] The base 1 is provided with a clearance area 11, and the lower electrode 12 of the multi-pulse welding machine 8 is distributed within the clearance area 11. The lower electrode 12 is distributed under the positioning seat 4, which is made of copper, to enable the multi-pulse welding machine 8 to form a path to complete the welding. In the prior art, the electrode is changed to a tungsten electrode to improve the stability of the multi-pulse welding machine, but it is mainly used in the field of high melting point financial welding, such as aerospace materials such as titanium. This invention is for steel welding. If a tungsten electrode is used for welding, it is very easy to be penetrated, which will cause the car door hinge and the car door hinge reinforcement plate to fail to be fused and welded together.

[0055] In this invention, when welding is required between the car door hinge reinforcement plate and the car door hinge, the first step is to mate the car door hinge with the positioning pin 61 and the support component 7, and then mate the car door hinge reinforcement plate with the positioning pin 61 and screw in the limiting bolt 63.

[0056] Step 2: Cylinder 131 drives pressure plate 132 to press the car door hinge reinforcement plate tightly. Then, through the cooperation of the first linear motion component 93 and the second linear motion component 94 with the multi-pulse welding machine 8, the four ends of the car door hinge reinforcement plate are welded.

[0057] Step 3: After welding is completed, cylinder 131 drives pressure plate 132 to reset, unscrew limit bolt 63, and remove the welded product;

[0058] Step 4: When the upper electrode of the multi-pulse welding machine 8 needs to be adjusted, the first linear motion component 93 and the second linear motion component 94 work together to move the mold-repairing table 101 to below the upper electrode of the multi-pulse welding machine 8. The upper electrode of the multi-pulse welding machine 8 descends and enters the mold-repairing machine 102 for shaping to ensure welding quality.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely prisms of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A welding fixture for reinforcing plates of automotive door hinges, characterized in that: include abutment(1); Welding table (2) is used to fix the car door hinge and the car door hinge reinforcement plate; Positioning seat (4) is located in the middle of welding table (2) and is used to position the reinforcing plate that is connected to the car door hinge. A tungsten metal plate (5) is set on the middle of the positioning seat (4) and is attached to the bottom surface of the car door hinge; The positioning component (6) is set on the tungsten metal plate (5) to position the car door hinge reinforcement plate; The first buffer assembly (3) is set between the base (1) and the welding table (2) to buffer the impact of the multi-pulse welding machine on the welding table (2); The fixing component (13), mounted on the welding table (2), is used to press the automotive door hinge reinforcement plate. Support components (7) are set on the welding table (2) and are respectively attached to the back of the left and right door hinges to support the left and right door hinges respectively.

2. The welding fixture for the automotive door hinge reinforcement plate according to claim 1, characterized in that: The first buffer assembly (3) includes a first guide post (31) that cooperates with the base (1), and a first shock-absorbing spring (32) is fitted on the first guide post (31).

3. The welding fixture for the automotive door hinge reinforcement plate according to claim 1, characterized in that: The positioning component (6) includes a positioning pin (61) disposed on the tungsten plate (5). The positioning component (6) also includes two positioning holes (62) disposed parallel to each other along the length of the tungsten plate (5). The positioning holes (62) are provided with limiting bolts (63) that cooperate with the left and right door hinges respectively to fix the relative positions of the door hinge reinforcement plate and the car door hinge.

4. The welding fixture for the automotive door hinge reinforcement plate according to claim 1, characterized in that: The fixing component (13) includes a cylinder (131) mounted on a welding table (2), and the cylinder (131) is provided with a pressure plate (132) for pressing the door hinge reinforcement plate.

5. The welding fixture for the automotive door hinge reinforcement plate according to claim 1, characterized in that: The support assembly (7) includes a base (71) mounted on the welding table (2). The top of the base (71) is provided with an inclined surface (72) that fits against the back of the car door hinge. An extension (73) with a triangular cross-section is provided on the inclined surface (72) perpendicular to the inclined surface (72).

6. A welding system for reinforcing plates of automotive door hinges, using the welding fixture for reinforcing plates of automotive door hinges as described in any one of claims 1 to 5, characterized in that: It includes a multi-pulse welding machine (8), and a moving component (9) that works with the base (1) to enable the base (1) to move in two degrees of freedom. The base (1) is also provided with a mold repair component (10).

7. The automotive door hinge reinforcement plate welding system according to claim 6, characterized in that: The moving component (9) includes a support frame (91) connected to a multi-pulse welding machine (8), a moving stage (92) is provided on the support frame (91), and the base (1) is mounted on the moving stage (92). The moving component (9) also includes a first linear motion component (93) provided on the support frame (91) and a second linear motion component (94) provided on the moving stage (92). The first linear motion component (93) drives the moving stage (92) to move in the horizontal direction, and the second linear motion component (94) drives the base (1) to move in the direction perpendicular to the horizontal direction.

8. The automotive door hinge reinforcement plate welding system according to claim 7, characterized in that: The mold repair assembly (10) includes a mold repair table (101) set on the base (1), a mold repair machine (102) is provided on the mold repair table (101), a second buffer assembly (103) is provided between the mold repair machine (102) and the mold repair table (101), the second buffer assembly (103) includes a second guide post (104) that cooperates with the mold repair machine (102) and the mold repair table (101), and a second shock-absorbing spring (105) is provided on the second guide post (104).

9. The automotive door hinge reinforcement plate welding system according to claim 8, characterized in that: The base (1) is provided with a clearance area (11), and the lower electrode (12) of the multi-pulse welding machine (8) is distributed in the clearance area (11).

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