Welding auxiliary positioning device for automobile hinge machining
By designing reference plane adjustment components and angle adjustment components, the problems of hinge welding positioning deviation and angle adaptation were solved, achieving accuracy and adaptability of hinge welding, avoiding hinge scrap, and improving the versatility and flexibility of the device.
Patent Information
- Application Number
- CN202511449587.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-11
- Publication Date
- 2025-11-14
AI Technical Summary
Existing hinge processing and welding equipment is prone to welding deviations between the hinge sleeve and the hinge rod during positioning, and cannot adapt to the maximum opening angle of different hinges, resulting in the welded hinges being unsuitable for car doors and thus discarding the hinges.
A welding auxiliary positioning device was designed, comprising a reference plane adjustment component, an angle adjustment component, a sliding component, and a clamping component. By simulating the opening and closing of an electric vehicle door, the position and angle of the hinge rod and hinge sleeve are flexibly adjusted to ensure compatibility before welding. The position of the hinge rod is fixed by a plug rod to improve positioning accuracy.
It achieves accuracy and adaptability in hinge welding, avoids hinge discards due to incompatibility, improves the versatility and flexibility of the device, and ensures that the welded hinges meet the door opening and closing angle requirements.
Smart Images
Figure CN120940959A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of automotive hinge welding technology, and more specifically, to a welding auxiliary positioning device for automotive hinge processing. Background Technology
[0002] Welding technology plays a crucial role in the manufacturing process of new energy electric vehicles. Hinges are important components that connect the doors to the vehicle body, and their quality and performance directly affect the safety and comfort of the vehicle.
[0003] Existing hinge processing and welding equipment for electric vehicles requires the hinges to be fixed and positioned in actual use to facilitate subsequent welding. However, existing positioning devices often fix and weld the hinges directly using fixing devices, which may cause deviations in the welding between the hinge sleeve and the hinge rod. Secondly, the welded hinge may deviate from the maximum opening angle of the car door, rendering the entire hinge unusable. Furthermore, existing fixing devices have limitations in adapting to the maximum opening angle of different hinges. Summary of the Invention
[0004] To address the problems mentioned in the background art, the present invention provides a welding auxiliary positioning device for automotive hinge processing, which includes a worktable, and a hinge rod and a hinge sleeve to be welded. Preferably, the workbench has a ash discharge port, and an installation rod is provided on the workbench above the ash discharge port. A reference surface adjustment assembly is symmetrically arranged on the installation rod to simulate an electric vehicle door. The reference surface adjustment assembly includes a first installation plate fixed to the installation rod, and a second installation plate rotatably arranged on the installation rod symmetrically to the first installation plate. An angle adjustment assembly is provided on the workbench, and the second installation plate is connected to the workbench via the angle adjustment assembly. The angle adjustment assembly is used to adjust the opening angle between the second installation plate and the first installation plate. A sliding assembly is provided on the first installation plate, and a clamping assembly is provided on the sliding assembly to clamp the hinge sleeve. The sliding assembly is used to adjust the longitudinal position of the clamping assembly. A plurality of installation holes are symmetrically arranged on the second installation plate with respect to the clamping assembly. A plurality of insert rods are detachably provided on the installation holes, and the hinge rods are used to fix the position of the hinge rod within the installation holes.
[0005] As a further improvement to this technical solution, a fixing rod is provided on the first mounting plate, one end of which is fixedly connected to the workbench and the other end is fixedly connected to the first mounting plate.
[0006] As a further improvement to this technical solution, the angle adjustment assembly includes an angle adjustment plate, which is fixedly connected to the workbench. A first sliding groove is provided through both sides of the angle adjustment plate, and a first sliding rod is slidably connected in the first sliding groove. A first adjusting nut is threaded onto the first sliding rod outside the first sliding groove to limit the movement of the first sliding rod. A support rod is provided on the first sliding rod, with one end of the support rod rotatably connected to the second mounting plate and the other end rotatably connected to the first sliding rod.
[0007] As a further improvement to this technical solution, the sliding assembly includes a longitudinal adjusting plate, which is fixedly connected to the middle position of the first mounting plate. A sliding cavity is formed within the longitudinal adjusting plate, and a second sliding groove communicating with the sliding cavity is formed on one side of the longitudinal adjusting plate opposite to the second mounting plate. A slider is slidably connected within the sliding cavity. A connecting plate is fixedly connected to one side of the slider, and a second sliding rod is provided on the connecting plate. The second sliding rod is slidably connected within the second sliding groove. One end of the second sliding rod is fixedly connected to the connecting plate, and the other end extends into the second sliding groove and is threaded with a second adjusting nut for limiting the slider's position.
[0008] Preferably, the clamping assembly includes a mounting box fixedly connected to the slider, an adjustment box fixedly disposed inside the mounting box, a third sliding groove symmetrically formed on one side of the mounting box opposite to the second mounting plate, push rods symmetrically slidably connected inside the adjustment box, a tension spring sleeved on the push rod, a first rack provided at the opposite ends of the two push rods, the first rack slidably connected inside the adjustment box, the two ends of the tension spring being fixedly connected to the opposite ends of the two first racks respectively, and the opposite ends of the two push rods being fixedly connected to the ends of the first racks located inside the adjustment box respectively, the tension spring always having a tendency to cause the two push rods to move closer to each other; A third slide rod is slidably connected in the third slide groove. One end of the third slide rod is fixedly connected to the end of the first rack located outside the adjustment box. The other end of the third slide rod is fixedly connected to a clamping rod, and the two clamping rods are arranged opposite to each other. The first rack is meshed with a gear on one side outside the adjustment box. The gear is rotatably connected inside the mounting box. The two ends of the mounting box are slidably connected to a second rack. The second rack meshes with the gear and is symmetrically arranged with respect to the gear and the first rack. One end of the second rack extends to the outside of the mounting box.
[0009] As a further improvement to this technical solution, the mounting holes and the connecting holes on one side of the insert rod and the hinge rod are all adapted to each other, and the mounting holes are opened in a matrix pattern along the longitudinal direction of the center position of the second mounting plate.
[0010] Preferably, the radius of the clamping rod is smaller than the radius of the inner ring of the hinge sleeve.
[0011] As a further improvement to this technical solution, the first mounting plate and the second mounting plate have the same structure and are both semi-U-shaped structures, used to simulate the opening and closing of a car door.
[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this welding auxiliary positioning device for automotive hinge processing, the design of the reference surface adjustment component (including a first mounting plate, a second mounting plate, and their structure) can simulate the opening and closing of an electric vehicle door, making the welding between the hinge rod and the hinge sleeve more suitable for the installation of the corresponding car door. This facilitates pre-testing of the hinge's compatibility before welding, thereby ensuring that the welded hinge can meet the opening and closing angle requirements of the car door and avoiding the problem of hinge scrap due to incompatibility. At the same time, through the setting of the angle adjustment component (including an angle adjustment plate, a first slide groove, a first slide rod, a first adjusting nut, and a support rod), the maximum opening and closing angle between the second mounting plate and the first mounting plate can be flexibly adjusted. This adjustment mechanism facilitates adaptation according to the opening and closing angle or bending degree of different hinges, improving the versatility and flexibility of the device, enabling it to adapt to more types of hinge welding requirements.
[0013] 2. In this welding auxiliary positioning device for automotive hinge processing, through the cooperation of the sliding component and the clamping component (including a longitudinal adjusting plate, a sliding cavity, a second sliding groove, a slider, a connecting plate, a second sliding rod, a second adjusting nut, a mounting box, an adjusting box, a push rod, a tension spring, a third sliding groove, a third sliding rod, and a clamping rod), the longitudinal position of the clamping component can be adjusted and the hinge sleeve can be clamped. This facilitates flexible adjustment of the hinge sleeve position according to the specific structure of the hinge rod and the hinge sleeve, ensuring the accuracy of the welding point.
[0014] 3. In this welding auxiliary positioning device for automotive hinge processing, by setting up mounting holes and insert rods (setting up mounting holes on the second mounting plate and fixing the position of the hinge rod by insert rods), the hinge rod can be easily fixed, so that the position of the hinge rod on the mounting hole matches the specific installation position of the car door, simplifying the fixing process of the hinge rod and improving the convenience and accuracy of installation. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial structural diagram of the hinge of the present invention; Figure 3 This is a schematic diagram of the structure of the first mounting plate of the present invention; Figure 4 This is a schematic diagram of the installation box of the present invention; Figure 5 This is a cross-sectional structural diagram of the mounting box of the present invention; Figure 6 This is a cross-sectional structural diagram of the mounting box of the present invention; Figure 7 for Figure 6 Enlarged view of the structure at point A in the middle; Figure 8 This is a top view showing the cross-sectional structure of the mounting box of the present invention; Figure 9 This is a schematic diagram of the clamping rod of the present invention; Figure 10 This is a schematic diagram of the structure of the second mounting plate of the present invention.
[0016] The meanings of the labels in the diagram are as follows: 1. Workbench; 2. Ash discharge port; 3. Mounting rod; 4. First mounting plate; 5. Second mounting plate; 6. Fixing rod; 7. Angle adjustment assembly; 8. Sliding assembly; 9. Clamping assembly; 10. Hinge rod; 11. Hinge sleeve; 12. Mounting hole; 13. Insert rod 71. Angle adjustment plate; 72. First slide groove; 73. First slide rod; 74. First adjusting nut; 75. Support rod; 81. Longitudinal adjusting plate; 82. Slide cavity; 83. Second slide groove; 84. Slider; 85. Connecting plate; 86. Second slide rod; 87. Second adjusting nut; 91. Mounting box; 92. Adjustment box; 93. First rack; 94. Third slide rod; 95. Clamping rod; 96. Gear; 97. Second rack; 98. Third slide groove; 99. Tension spring; 991. Top rod. Detailed Implementation
[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0018] Existing fixing devices used for welding have limitations in adapting to the maximum opening angle of the hinge, resulting in welded hinges that are not adapted to the maximum opening angle of electric vehicle doors, rendering the hinges unusable.
[0019] Therefore, the present invention provides a welding auxiliary positioning device for automotive hinge processing, see [link to related document]. Figures 1-2 As shown, it includes a workbench 1, and hinge rod 10 and hinge sleeve 11 to be welded. The workbench 1 has a ash discharge port 2 for collecting iron filings or impurities that fall during welding. A corresponding material box can be set below the ash discharge port 2 to collect them. A corresponding welding device or mechanical welding hand can be set on the workbench 1. An installation rod 3 is set on the workbench 1 above the ash discharge port 2. A reference surface adjustment component is symmetrically set on the installation rod 3 to simulate an electric car door. The reference surface adjustment component includes a first installation plate 4. A fixing rod 6 is set on the first installation plate 4. One end of the fixing rod 6 is fixedly connected to the workbench 1, and the other end is fixedly connected to the first installation plate 4. A second installation plate 5 is rotatably set on the installation rod 3 in a position symmetrical to the first installation plate 4. The first installation plate 4 and the second installation plate 5 have the same structure and are both semi-U-shaped structures. This can more closely simulate the opening and closing of the car door, making the welding between the hinge rod 10 and the hinge sleeve 11 more suitable for the installation of the corresponding car door.
[0020] Specifically, such as Figure 1 and Figure 10 As shown, an angle adjustment assembly 7 is provided on the workbench 1. The second mounting plate 5 is connected to the workbench 1 through the angle adjustment assembly 7. The angle adjustment assembly 7 is used to adjust the opening and closing angle between the second mounting plate 5 and the first mounting plate 4. The angle adjustment assembly 7 includes an angle adjustment plate 71, which is fixedly connected to the workbench 1. A first slide groove 72 is provided through both sides of the angle adjustment plate 71. A first slide rod 73 is slidably connected in the first slide groove 72. A first adjusting nut 74 is threaded onto the first slide rod 73 located outside the first slide groove 72 to limit the movement of the first slide rod 73. A support rod 75 is provided on the first slide rod 73. One end of the support rod 75 is connected to the first slide rod 73. The second mounting plate 5 is rotatably connected, and the other end is rotatably connected to the first sliding rod 73. This allows the maximum opening angle between the second mounting plate 5 and the first mounting plate 4 to be flexibly adjusted according to the opening angle or bending degree of the hinge rod 10 and the corresponding structure. This enables the entire reference surface assembly to accommodate the welding of more hinges. Even if the opening angle is different, or the bending degree or structure of the hinge rod 10 is different, the angle of the second mounting plate 5 can be adjusted to flexibly adapt to the maximum opening angle of the car door. This is more conducive to the welding of the hinge rod 10 and the hinge sleeve 11, and also ensures that the hinge rod 10 and the hinge sleeve 11 can better adapt to the maximum opening angle of the car door to be installed after welding.
[0021] Furthermore, such as Figure 3 and Figures 5-6As shown, a sliding assembly 8 is provided on the first mounting plate 4, and a clamping assembly 9 is provided on the sliding assembly 8 for clamping the hinge sleeve 11. The sliding assembly 8 is used to adjust the longitudinal position of the clamping assembly 9. The sliding assembly 8 includes a longitudinal adjusting plate 81, which is fixedly connected to the middle position of the first mounting plate 4. A sliding cavity 82 is formed in the longitudinal adjusting plate 81. A second sliding groove 83 communicating with the sliding cavity 82 is formed on one side of the longitudinal adjusting plate 81 that is opposite to the second mounting plate 5. A slider 84 is slidably connected in the sliding cavity 82. A connecting plate 85 is fixedly connected to one side of the slider 84. A second sliding rod 86 is provided on the connecting plate 85. The second sliding rod 86 is slidably connected in the second sliding groove 83. One end of the second sliding rod 86 is fixedly connected to the connecting plate 85, and the other end extends to the second sliding groove 83 and is threadedly connected to a second adjusting nut 87 for limiting the slider 84. Specifically, such as Figures 4-9 As shown, the clamping assembly 9 includes a mounting box 91 fixedly connected to the slider 84. An adjusting box 92 is fixedly installed inside the mounting box 91. A third sliding groove 98 is symmetrically opened on one side of the mounting box 91 opposite to the second mounting plate 5. Push rods 991 are symmetrically slidably connected inside the adjusting box 92. Tension springs 99 are sleeved on the push rods 991. A first rack 93 is provided at the opposite ends of the two push rods 991. The first rack 93 is slidably connected inside the adjusting box 92. Both ends of the tension spring 99 are fixedly connected to the opposite ends of the two first racks 93, and the opposite ends of the two push rods 991 are fixedly connected to the ends of the first racks 93 located inside the adjusting box 92. The tension spring 99 always ensures that the two push rods 991 are in contact with each other. The trend of mutual approach; a third slide rod 94 is slidably connected in the third slide groove 98. One end of the third slide rod 94 is fixedly connected to the end of the first rack 93 located outside the adjustment box 92. The other end of the third slide rod 94 is fixedly connected to a clamping rod 95. The two clamping rods 95 are arranged opposite each other, and the radius of the clamping rod 95 is smaller than the radius of the inner ring of the hinge sleeve 11. A gear 96 is meshed on the side of the first rack 93 located outside the adjustment box 92. The gear 96 is rotatably connected in the mounting box 91. A second rack 97 is slidably connected to both ends of the mounting box 91. The second rack 97 meshes with the gear 96, and the second rack 97 is symmetrically arranged with the first rack 93 compared to the gear 96. One end of the second rack 97 extends to the outside of the mounting box 91.
[0022] Furthermore, such as Figure 1 and Figure 10 As shown, a number of mounting holes 12 are provided on the second mounting plate 5 in a symmetrical position with the clamping assembly 9. A number of insert rods 13 are detachably provided on the mounting holes 12. The mounting holes 12 fix the position of the hinge rod 10 through the insert rods 13. The mounting holes 12 and the insert rods 13 are all compatible with the connecting holes on one side of the hinge rod 10. The mounting holes 12 are opened in a matrix pattern along the longitudinal direction of the center position of the second mounting plate 5.
[0023] Working principle: During welding, the second racks 97 on both sides of the mounting box 91 are pressed simultaneously. When the second racks 97 are pressed, they slide inward along both ends of the mounting box 91, thereby driving the gear 96 to rotate. Since the gear 96 meshes with the first rack 93 on the opposite side of the second rack 97, the gear 96 drives the first rack 93 to move in the opposite direction to the second rack 97, thereby driving the third slide rod 94 to slide in the third slide groove 98. Therefore, pressing the second racks 97 on both sides at the same time causes the two clamping rods 95 to move away from each other. At this time, the hinge sleeve 11 can be put onto the clamping rods 95. When the second racks 97 are released, the two clamping rods 95 will be driven by the tension spring 99 to move the first rack 93 closer to each other, thereby causing the clamping rods 95 to move closer to each other and clamping the hinge sleeve 11.
[0024] Furthermore, based on the maximum opening angle of the door to be installed using the hinge rod 10 and hinge sleeve 11 to be welded, the opening angle between the second mounting plate 5 and the first mounting plate 4 is adjusted to correspond to the opening angle of the door, achieving a simulation effect. This allows for pre-testing to ensure the quality and compatibility of the hinge. First, the first sliding rod 73 slides within the first sliding groove 72, thereby driving the support rod 75 to slide within the angle adjustment plate 71, thus... Figure 10 It can also be seen that the second mounting plate 5 will rotate away from the first mounting plate 4. The reason for fixing the first mounting plate 4 is that the A-pillar or B-pillar position is fixed during the opening and closing of the car door. Therefore, the first mounting plate 4 needs to remain stationary to adjust the angle of the second mounting plate 5. Moreover, there is a corresponding angle indicator on the mounting rod 3, which is not shown in the figure. After the angle is adjusted properly, tightening the first adjusting nut 74 can fix the first sliding rod 73 in the first sliding groove 72. In this way, the support rod 75 will not move, and the angle of the second mounting plate 5 is determined.
[0025] Next, the position of the mounting box 91 and the position of the hinge rod 10 on the mounting hole 12 can be flexibly adjusted according to the structure of the hinge rod 10 and the hinge sleeve 11. It should be noted that when the hinge is finally installed, the hinge sleeve 11 is also equipped with a mounting seat by means of a pin. Considering that the hinge is not the focus of this invention, it is not shown in the figure. For the hinge, the main welding required is between the hinge rod 10 and the hinge sleeve 11. After welding, the hinge sleeve 11 is directly installed on the mounting seat by means of a pin to realize the assembly of the hinge. Then, according to the curvature of the hinge rod 10, that is, the structure of the hinge rod 10, the hinge rod 10 is first fixed on the mounting hole 12 of the second mounting plate 5. Specifically, the connecting hole on one side of the hinge rod 10 is aligned with the mounting hole 12 on the second mounting plate 5 to adapt it to the specific installation position of the car door. Then, the hinge rod 10 is fixed on the corresponding mounting hole 12 by means of a pin 13.
[0026] Then, the position of the mounting box 91 can be adjusted. Since the mounting box 91 is fixed on the slider 84, the position of the slider 84 is adjusted so that the hinge sleeve 11 held on the clamping rod 95 can fit against the end of the hinge rod 10 to be welded. According to the preset maximum opening angle of the hinge, as long as the mounting box 91 moves the clamping rod 95 up and down, as long as the hinge sleeve 11 on the clamping rod 95 fits against the end of the hinge rod 10 to be welded, this position is the prepared welding point, that is, the center of the hinge sleeve 11 is directly opposite the end of the hinge rod 10 to be welded. This can ensure the accuracy of welding. After the position of the mounting box 91 is determined, the second adjusting nut 87 can be tightened directly so that the second adjusting nut 87 presses against the longitudinal adjusting plate 81, thereby achieving the purpose of limiting the slider 84, and thus achieving the purpose of limiting the mounting box 91.
[0027] In summary, this effectively solves the problem that existing fixing devices used for welding have limitations in adapting to the maximum opening angle of hinges, resulting in welded hinges that are not adapted to the maximum opening angle of electric vehicle doors, thus rendering the hinges unusable.
[0028] 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 preferred examples and are not intended to limit 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 present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.
Claims
1. A welding auxiliary positioning device for automotive hinge processing, comprising a worktable (1), and a hinge rod (10) and a hinge sleeve (11) to be welded, characterized in that: The workbench (1) is provided with a ash discharge port (2). An installation rod (3) is provided on the workbench (1) above the ash discharge port (2). A reference surface adjustment assembly is symmetrically provided on the installation rod (3) for simulating an electric vehicle door. The reference surface adjustment assembly includes a first installation plate (4), which is fixed on the installation rod (3). A second installation plate (5) is rotatably provided on the installation rod (3) in a position symmetrical to the first installation plate (4). An angle adjustment assembly (7) is provided on the workbench (1). The second installation plate (5) is connected to the workbench (1) through the angle adjustment assembly (7). The angle adjustment component (7) is used to adjust the opening angle between the second mounting plate (5) and the first mounting plate (4). The first mounting plate (4) is provided with a sliding component (8), and the sliding component (8) is provided with a clamping component (9) for clamping the hinge sleeve (11). The sliding component (8) is used to adjust the longitudinal position of the clamping component (9). The second mounting plate (5) is provided with a plurality of mounting holes (12) symmetrically positioned with respect to the clamping component (9). A plurality of insert rods (13) are detachably provided on the mounting holes (12). The mounting holes (12) fix the position of the hinge rod (10) through the insert rods (13).
2. The welding auxiliary positioning device for automotive hinge processing according to claim 1, characterized in that: A fixing rod (6) is provided on the first mounting plate (4). One end of the fixing rod (6) is fixedly connected to the workbench (1), and the other end is fixedly connected to the first mounting plate (4).
3. The welding auxiliary positioning device for automotive hinge processing according to claim 1, characterized in that: The angle adjustment assembly (7) includes an angle adjustment plate (71), which is fixedly connected to the workbench (1). The angle adjustment plate (71) has a first slide groove (72) through both sides. A first slide rod (73) is slidably connected in the first slide groove (72). A first adjusting nut (74) is threaded on the outside of the first slide rod (73) located in the first slide groove (72) to limit the first slide rod (73). A support rod (75) is provided on the first slide rod (73). One end of the support rod (75) is rotatably connected to the second mounting plate (5), and the other end is rotatably connected to the first slide rod (73).
4. The welding auxiliary positioning device for automotive hinge processing according to claim 1, characterized in that: The sliding assembly (8) includes a longitudinal adjustment plate (81), which is fixedly connected to the middle position of the first mounting plate (4). A sliding cavity (82) is provided in the longitudinal adjustment plate (81). A second sliding groove (83) communicating with the sliding cavity (82) is provided on one side of the longitudinal adjustment plate (81) that is opposite to the second mounting plate (5). A slider (84) is slidably connected in the sliding cavity (82). A connecting plate (85) is fixedly connected to one side of the slider (84). A second sliding rod (86) is provided on the connecting plate (85). The second sliding rod (86) is slidably connected in the second sliding groove (83). One end of the second sliding rod (86) is fixedly connected to the connecting plate (85), and the other end extends to the second sliding groove (83) and is threaded with a second adjusting nut (87) for limiting the slider (84).
5. The welding auxiliary positioning device for automotive hinge processing according to claim 4, characterized in that: The clamping assembly (9) includes a mounting box (91) fixedly connected to the slider (84). An adjustment box (92) is fixedly installed inside the mounting box (91). A third slide groove (98) is symmetrically opened on one side of the mounting box (91) that is opposite to the second mounting plate (5). A push rod (991) is symmetrically slidably connected inside the adjustment box (92). A tension spring (99) is sleeved on the push rod (991). A first rack (93) is provided at the opposite ends of the two push rods (991). The first rack (93) is slidably connected inside the adjustment box (92). The two ends of the tension spring (99) are fixedly connected to the opposite ends of the two first racks (93), and the opposite ends of the two push rods (991) are fixedly connected to the end of the first rack (93) located inside the adjustment box (92). The tension spring (99) always tends to make the two push rods (991) move closer to each other. A third slide rod (94) is slidably connected in the third slide groove (98). One end of the third slide rod (94) is fixedly connected to the end of the first rack (93) located outside the adjustment box (92). The other end of the third slide rod (94) is fixedly connected to a clamping rod (95). The two clamping rods (95) are arranged opposite to each other. The first rack (93) is located on one side outside the adjustment box (92) and meshes with a gear (96). The gear (96) is rotatably connected inside the mounting box (91). The mounting box (91) is slidably connected to two ends of a second rack (97). The second rack (97) meshes with the gear (96) and is symmetrically arranged with respect to the first rack (93) compared to the gear (96). One end of the second rack (97) extends to the outside of the mounting box (91).
6. The welding auxiliary positioning device for automotive hinge processing according to claim 1, characterized in that: The mounting hole (12) and the insertion rod (13) are compatible with the connection hole on one side of the hinge rod (10), and the mounting hole (12) is opened in a matrix along the longitudinal direction of the center position of the second mounting plate (5).
7. The welding auxiliary positioning device for automotive hinge processing according to claim 5, characterized in that: The radius of the clamp (95) is smaller than the radius of the inner ring of the hinge sleeve (11).
8. The welding auxiliary positioning device for automotive hinge processing according to claim 1, characterized in that: The first mounting plate (4) and the second mounting plate (5) have the same structure and are both semi-U-shaped structures, used to simulate the opening and closing of a car door.