An automotive component welding fixture position calibration device

Abstract

The present invention relates to the technical field of automobile welding, and specifically relates to a position calibration device for an automobile component welding fixture, which includes a base. Two end seats are symmetrically installed on the upper surface of the base. There are two symmetrically arranged supports between the two end seats. A first cylinder is rotatably installed on the back surfaces of the two end seats. The movable end of the first cylinder is rotatably installed with a U-shaped frame. The two ends of the U-shaped frame are respectively installed with a first end pressing rod and a second end pressing rod for pressing the automobile component. A second cylinder is rotatably installed on the side of the two supports facing away from the automobile component. The movable end of the second cylinder is rotatably installed with a pressing arm. The lower surface of the pressing arm is installed with a first middle pressing rod and a second middle pressing rod for pressing the automobile component. Rectangular holes are opened on one side surface of the second end pressing rod and one side surface of the second middle pressing rod. The present invention has the following beneficial effects: It realizes moving the calibration rod to different parts of the automobile component without adjusting the measurement reference point, improving the measurement accuracy and measurement efficiency.

Description

Technical Field

[0001] The present invention is a position calibration device for an automobile component welding fixture, belonging to the technical field of automobile welding. Background Art

[0002] The position calibration of an automobile component welding fixture is a very important process, which is the key to ensuring welding quality and production efficiency. The welding fixture is installed on the workbench to ensure that the fixing points of the fixture are firm and reliable. Then, measuring tools are used to accurately measure the key parts of the automobile component and the fixture to ensure that the positions of all parts meet the design requirements. High-precision measuring tools are used and multiple measurements are taken and averaged to reduce errors. During the measurement process by manual using measuring tools, there is a situation where the reference point needs to be searched repeatedly, which increases the measurement error on the one hand and reduces the measurement efficiency on the other hand. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a position calibration device for an automobile component welding fixture to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention is realized by the following technical solutions: A position calibration device for an automobile component welding fixture, including a base, on the upper surface of the base, two end seats are symmetrically installed, between the two end seats, two symmetrically arranged supports are provided, on the opposite sides of the two end seats, first cylinders are rotatably installed, on the movable ends of the first cylinders, U-shaped frames are rotatably installed, the U-shaped frames are rotatably installed at the upper ends of the end seats, at both ends of the U-shaped frame, a first end pressing rod and a second end pressing rod for pressing the automobile component are respectively installed, below the first end pressing rod and the second end pressing rod, a first end supporting rod and a second end supporting rod (17) for supporting the automobile component are respectively provided, the first end supporting rod and the second end supporting rod are connected to the end seats, on the sides of the two supports away from the automobile component, second cylinders are rotatably installed, on the movable ends of the second cylinders, pressing arms are rotatably installed, the pressing arms are rotatably installed at the tops of the supports, on the lower surfaces of the pressing arms, a first middle pressing rod and a second middle pressing rod for pressing the automobile component are installed, the first middle pressing rod is arranged on the side of the pressing arm close to the second cylinder, below the first middle pressing rod and the second middle pressing rod, a first middle supporting rod and a second middle supporting rod for lifting the automobile component are respectively provided, the first middle supporting rod and the second middle supporting rod are connected to the supports, on one side surface of the second end pressing rod and one side surface of the second middle pressing rod, rectangular holes are opened, and calibration parts are inserted into the rectangular holes.

[0005] Specifically, the calibration piece includes a rectangular rod, which is inserted into the rectangular hole. One end of the rectangular rod is provided with a perforation arranged horizontally, and the cross-section of the perforation is rectangular. An adjusting rod with a rectangular cross-section is inserted into the perforation. The adjusting rod is arranged along the width direction of the automotive component. One end of the adjusting rod close to the automotive component is provided with a rectangular sleeve through a U-shaped plate. A calibration rod arranged vertically is inserted into the rectangular sleeve. A vertically arranged scale line is machined on one side surface of the calibration rod. A vertically arranged guiding hole is opened on the upper surface of the calibration rod. A supporting rod is inserted into the guiding hole. A rubber tip in contact with the automotive component is installed at the lower end of the supporting rod. An adjusting piece for driving the supporting rod to move up and down along the guiding hole is installed at the upper end of the supporting rod.

[0006] Specifically, the adjusting piece includes a top plate. The upper end of the supporting rod is installed with a detachable top plate. An elastic cord is installed on the lower surface of the top plate, and the lower end of the elastic cord is connected to the calibration rod. A circular cavity is opened on one surface of the adjusting rod along the length direction of the adjusting rod. A connecting pipe identical to the circular cavity is installed at one end of the adjusting rod close to the rectangular sleeve. A cylinder is installed at the upper end of the connecting pipe. A piston is slidably installed in the cylinder. A push rod is installed at the middle position of the upper surface of the piston. The upper end of the cylinder is threadedly connected with a cylinder cover. A small hole is opened at the middle position of the upper surface of the cylinder cover. The upper end of the push rod penetrates through the small hole and contacts the lower surface of the top plate. A hollow pipe is installed at the end of the adjusting rod away from the rectangular sleeve. The hollow pipe communicates with the circular cavity. A rubber airbag connected and fixed to the hollow pipe is sleeved on the outer surface of the hollow pipe. A plurality of air holes are uniformly opened on the outer surface of the hollow pipe. A supporting ring connected and fixed to the supporting rod is sleeved on the lower end of the supporting rod. The supporting ring is arranged below the calibration rod.

[0007] Specifically, a first plane is opened on the outer surface of the supporting rod, and the first plane is arranged along the length direction of the supporting rod. A second plane arranged vertically is opened in the guiding hole, and the first plane is attached to the second plane.

[0008] Specifically, a rubber sleeve adhered to the rectangular rod is sleeved on the rectangular rod. The cross-section of the rubber sleeve is rectangular, and the rubber sleeve is attached to the inner wall of the rectangular hole.

[0009] Specifically, support wheels are installed at the four corners of the lower surface of the base. A push handle is installed at one side edge of the upper surface of the base. A label box is installed on the side surface of the push handle away from the base. A plurality of cross bars are installed on one surface of the label box, and the ends of the cross bars are connected and fixed to the push handle.

[0010] Specifically, a first inclined surface adapted to an automotive component is machined at the lower end of the first end head pressure rod, a second inclined surface adapted to the automotive component is machined at the lower end of the second end head pressure rod, a third inclined surface adapted to the automotive component is machined at the upper end of the first end head support rod, a fourth inclined surface adapted to the automotive component is machined at the upper end of the second end head support rod, a fifth inclined surface adapted to the automotive component is machined at the lower end of the first intermediate pressure rod, a sixth inclined surface adapted to the automotive component is machined at the lower end of the second intermediate pressure rod, a seventh inclined surface adapted to the automotive component is machined at the upper end of the first intermediate support rod, and an eighth inclined surface adapted to the automotive component is machined at the upper end of the second intermediate support rod.

[0011] Advantages of the present invention:

[0012] 1. Place two automotive components on two end seats and two support seats, and then control the first cylinder and the second cylinder to extend. After the first cylinder extends, it drives the first end head pressure rod and the second end head pressure rod to move downward through the U-shaped frame. Thus, the first end head pressure rod and the second end head pressure rod cooperate with the first end head support rod and the second end head support rod to achieve clamping and limiting of the mutually distant ends of the two automotive components. After the second cylinder extends, it drives the first intermediate pressure rod and the second intermediate pressure rod to move downward through the pressure arm. Thus, the first intermediate pressure rod and the second intermediate pressure rod cooperate with the first intermediate support rod and the second intermediate support rod to achieve clamping and limiting of the mutually close ends of the two automotive components.

[0013] 2. Insert the rectangular rod into the rectangular hole. Since a rubber sleeve that is in sliding contact with the inner wall of the rectangular hole is sleeved on the surface of the rectangular rod, the friction coefficient between the rectangular rod and the inner wall of the rectangular hole is increased, preventing the rectangular rod from randomly moving along the rectangular hole. The rectangular rod and the rectangular hole cooperate with each other to prevent the calibration rod from randomly rotating and keep the calibration rod in a vertical state.

[0014] 3. Rectangular holes are provided on both the second end head pressure rod and the second intermediate pressure rod, facilitating adjusting the relative position between the rectangular rod and the automotive component as needed. Since the rectangular holes on the second end head pressure rod and the second intermediate pressure rod are at the same level, less effort is required to adjust the measurement reference point when adjusting the position of the rectangular rod. Adjust the position of the rectangular rod along the rectangular hole, and then the relative position between the calibration rod and the automotive component changes, achieving adjusting the relative position between the calibration rod and the automotive component as needed.

[0015] 4. Move the adjusting rod along the through hole. Then, the adjusting rod drives the structure formed by the calibration rod and the support rod to move through the rectangular sleeve, so that the structure formed by the calibration rod and the support rod moves along the width direction of the automotive component, achieving moving the calibration rod to different parts of the automotive component without adjusting the measurement reference point, improving the measurement accuracy and measurement efficiency.

[0016] 5. When it is necessary to adjust the relative position between the calibration rod and the automotive component, pinch the rubber airbag. Thus, the air in the rubber airbag enters the air cylinder through the passage formed by the air vent holes, the hollow tube, the circular cavity, and the connecting tube. Subsequently, the piston moves upward in the air cylinder under the pressure of the air, so that the ejector rod lifts the top plate. At this time, the elastic rope is stretched, and the support rod moves upward along the guiding hole. When the supporting ring contacts the calibration rod, the supporting ring forces the calibration rod to move upward along the rectangular sleeve, so that the rubber tip moves upward and does not contact the automotive component, realizing the convenient lifting of the structure formed by the calibration rod and the support rod. When the rubber airbag returns to its original state, under the action of the elastic rope, the support rod moves downward until the rubber tip contacts the automotive component. Then, the height difference between the relative position of the automotive component and the rectangular rod can be measured according to the scale line on the calibration rod, realizing the measurement of different parts of the automotive component and providing data for the calibration of the automotive component. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non - limiting embodiments read in conjunction with the accompanying drawings:

[0018] Figure 1 Structural schematic diagram of a position calibration device for a welding fixture of an automotive component according to the present invention;

[0019] Figure 2 is Figure 1 Enlarged view at A in

[0020] Figure 3 Another perspective three - dimensional view of a position calibration device for a welding fixture of an automotive component according to the present invention;

[0021] Figure 4 Three - dimensional view of an automotive component in a position calibration device for a welding fixture of an automotive component according to the present invention;

[0022] Figure 5 Assembly schematic diagram of an adjusting rod, a connecting tube, a support rod, a calibration rod, and a rectangular rod in a position calibration device for a welding fixture of an automotive component according to the present invention;

[0023] Figure 6 Assembly schematic diagram of a support rod, a rectangular sleeve, a hollow tube, an adjusting rod, and a rectangular rod in a position calibration device for a welding fixture of an automotive component according to the present invention;

[0024] Figure 7 Three - dimensional view of a calibration rod in a position calibration device for a welding fixture of an automotive component according to the present invention;

[0025] Figure 8 Assembly schematic diagram of a piston, an ejector rod, a cylinder cover, and an air cylinder in a position calibration device for a welding fixture of an automotive component according to the present invention;

[0026] In the figure: 1, base, 2, end seat, 3, rubber sleeve, 4, support wheel, 5, push handle, 6, label box, 7, first cylinder, 8, cross bar, 9, U-shaped frame, 10, first end pressure rod, 11, pressure arm, 12, first intermediate pressure rod, 13, second intermediate pressure rod, 14, second cylinder, 15, second end pressure rod, 16, automobile parts, 17, second end support rod, 18, rectangular sleeve, 19, adjustment rod, 20, rectangular rod, 21, connecting pipe , 22. air cylinder, 23. cylinder cover, 24. push rod, 25. top plate, 26. elastic rope, 27. support rod, 28. rectangular hole, 29. second middle support rod, 30. calibration rod, 31. first end support rod, 32. first middle support rod, 33. rubber tip, 34. hollow tube, 35. air vent, 36. first plane, 37. guide hole, 38. second plane, 39. piston, 40. support, 41. rubber airbag, 42. support ring. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0028] See also Figure 1 and Figure 3 The present invention provides a technical solution: a device for calibrating the position of a welding fixture for automobile parts, comprising a base 1, support wheels 4 are installed at the four corners of the lower surface of the base 1, a push handle 5 is installed at the edge of one side of the upper surface of the base 1, a label box 6 is installed on the side of the push handle 5 away from the base 1, and a plurality of cross bars 8 are installed on one side of the label box 6, and the ends of the cross bars 8 are connected and fixed to the push handle 5. The cross bars 8 improve the stability of the connection between the label box 6 and the push handle 5. By installing the support wheels 4 on the base 1, it is convenient to move the position of the base 1.

[0029] See also Figures 1-4, two end seats 2 are symmetrically installed on the upper surface of the base 1. There are two symmetrically arranged supports 40 between the two end seats 2. A first cylinder 7 is rotatably installed on the back surface of each of the two end seats 2. The movable end of the first cylinder 7 is rotatably installed with a U-shaped frame 9. The U-shaped frame 9 is rotatably installed at the upper end of the end seat 2. The two ends of the U-shaped frame 9 are respectively installed with a first end pressing rod 10 and a second end pressing rod 15 for pressing the automotive part 16. A first end supporting rod 31 and a second end supporting rod 17 for supporting the automotive part 16 are respectively provided on the lower sides of the first end pressing rod 10 and the second end pressing rod 15. The first end supporting rod 31 and the second end supporting rod 17 are connected to the end seat 2. A second cylinder 14 is rotatably installed on the side of each of the two supports 40 facing away from the automotive part 16. The movable end of the second cylinder 14 is rotatably installed with a pressing arm 11. The pressing arm 11 is rotatably installed at the top of the support 40. A first middle pressing rod 12 and a second middle pressing rod 13 for pressing the automotive part 16 are installed on the lower surface of the pressing arm 11. The first middle pressing rod 12 is arranged on the side of the pressing arm 11 close to the second cylinder 14. A first middle supporting rod 32 and a second middle supporting rod 29 for lifting the automotive part 16 are respectively provided on the lower sides of the first middle pressing rod 12 and the second middle pressing rod 13. The first middle supporting rod 32 and the second middle supporting rod 29 are connected to the support 40. The lower end of the first end pressing rod 10 is processed with a first inclined surface that cooperates with the automotive part 16. The lower end of the second end pressing rod 15 is processed with a second inclined surface that cooperates with the automotive part 16. The upper end of the first end supporting rod 31 is processed with a third inclined surface that cooperates with the automotive part 16. The upper end of the second end supporting rod 17 is processed with a fourth inclined surface that cooperates with the automotive part 16. The lower end of the first middle pressing rod 12 is processed with a fifth inclined surface that cooperates with the automotive part 16. The lower end of the second middle pressing rod 13 is processed with a sixth inclined surface that cooperates with the automotive part 16. The upper end of the first middle supporting rod 32 is processed with a seventh inclined surface that cooperates with the automotive part 16. The upper end of the second middle supporting rod 29 is processed with an eighth inclined surface that cooperates with the automotive part 16. Place the two automotive parts 16 on the two end seats 2 and the two supports 40, and then control the first cylinder 7 and the second cylinder 14 to extend. Then, after the first cylinder 7 extends, it drives the first end pressing rod 10 and the second end pressing rod 15 to move downward through the U-shaped frame 9. Thus, the first end pressing rod 10, the second end pressing rod 15 cooperate with the first end supporting rod 31 and the second end supporting rod 17 to realize the clamping and limiting of the mutually separated ends of the two automotive parts 16. After the second cylinder 14 extends, it drives the first middle pressing rod 12 and the second middle pressing rod 13 to move downward through the pressing arm 11. Thus, the first middle pressing rod 12, the second middle pressing rod 13 cooperate with the first middle supporting rod 32 and the second middle supporting rod 29 to realize the clamping and limiting of the mutually approaching ends of the two automotive parts 16.

[0030] Refer to Figures 1-8, rectangular holes 28 are provided on one side of the second end pressing rod 15 and one side of the second intermediate pressing rod 13. A rectangular rod 20 is inserted into the rectangular hole 28. A rubber sleeve 3 adhered to the rectangular rod 20 is sleeved on the rectangular rod 20. The cross-section of the rubber sleeve 3 is rectangular. The rubber sleeve 3 is in fit with the inner wall of the rectangular hole 28. The rectangular rod 20 is inserted into the rectangular hole 28. Since the surface of the rectangular rod 20 is sleeved with the rubber sleeve 3 that is in sliding contact with the inner wall of the rectangular hole 28, the friction coefficient between the rectangular rod 20 and the inner wall of the rectangular hole 28 is increased, preventing the rectangular rod 20 from randomly moving along the rectangular hole 28. The rectangular rod 20 and the rectangular hole 28 cooperate with each other to prevent the calibration rod 30 from randomly rotating and keep the calibration rod 30 in a vertical state.

[0031] Refer to Figures 1-8 , a horizontally arranged through hole is provided at one end of the rectangular rod 20. The cross-section of the through hole is rectangular. An adjusting rod 19 with a rectangular cross-section is inserted into the through hole. The adjusting rod 19 is arranged along the width direction of the automotive component 16. One end of the adjusting rod 19 close to the automotive component 16 is provided with a rectangular sleeve 18 through a U-shaped plate. A vertically arranged calibration rod 30 is inserted into the rectangular sleeve 18. A vertically arranged scale line is machined on one side of the calibration rod 30. A vertically arranged guide hole 37 is provided on the upper surface of the calibration rod 30. A support rod 27 is inserted into the guide hole 37. A rubber tip 33 in contact with the automotive component 16 is installed at the lower end of the support rod 27. The adjusting rod 19 is moved along the through hole, and then the structure formed by the adjusting rod 19 drives the structure formed by the calibration rod 30 and the support rod 27 through the rectangular sleeve 18, so that the structure formed by the calibration rod 30 and the support rod 27 moves along the width direction of the automotive component 16, realizing the movement of the calibration rod 30 to different parts of the automotive component 16 without adjusting the measurement reference point, improving the measurement accuracy and measurement efficiency.

[0032] Refer to Figures 1-8, a detachable top plate 25 is installed at the upper end of the support rod 27. An elastic rope 26 is installed on the lower surface of the top plate 25. The lower end of the elastic rope 26 is connected to the calibration rod 30. A circular cavity is arranged on one side of the adjusting rod 19 along the length direction of the adjusting rod 19. A connecting pipe 21 identical to the circular cavity is installed at one end of the adjusting rod 19 close to the rectangular sleeve 18. An air cylinder 22 is installed at the upper end of the connecting pipe 21. A piston 39 is slidably installed in the air cylinder 22. A top rod 24 is installed at the middle position of the upper surface of the piston 39. The upper end of the air cylinder 22 is threadedly connected with a cylinder cover 23. A small hole is arranged at the middle position of the upper surface of the cylinder cover 23. The upper end of the top rod 24 penetrates through the small hole and contacts with the lower surface of the top plate 25. A hollow tube 34 is installed at one end of the adjusting rod 19 away from the rectangular sleeve 18. The hollow tube 34 communicates with the circular cavity. A rubber airbag 41 connected and fixed to the hollow tube 34 is sleeved on the outer surface of the hollow tube 34. A plurality of air holes 35 are evenly arranged on the outer surface of the hollow tube 34. A support ring 42 connected and fixed to the support rod 27 is sleeved on the lower end of the support rod 27. The support ring 42 is arranged on the lower side of the calibration rod 30. A first plane 36 is arranged on the outer surface of the support rod 27 along the length direction of the support rod 27. A second plane 38 arranged vertically is arranged in the guiding hole 37. The first plane 36 is in fit with the second plane 38. When it is necessary to adjust the relative position between the calibration rod 30 and the vehicle component 16, the rubber airbag 41 is pinched by hand. Thus, the air in the rubber airbag 41 enters the air cylinder 22 through the passage formed by the air holes 35, the hollow tube 34, the circular cavity and the connecting pipe 21. Subsequently, the piston 39 moves upward in the air cylinder 22 under the top pressure of the air. Thus, the top rod 24 jacks up the top plate 25. At this time, the elastic rope 26 is stretched. The support rod 27 moves upward along the guiding hole 37. When the support ring 42 contacts the calibration rod 30, the support ring 42 forces the calibration rod 30 to move upward along the rectangular sleeve 18. Thus, the rubber tip 33 moves upward and does not contact the vehicle component 16, realizing the convenient lifting of the structure formed by the calibration rod 30 and the support rod 27. When the rubber airbag 41 resumes its original state, under the action of the elastic rope 26, the support rod 27 moves downward until the rubber tip 33 contacts the vehicle component 16. Then, the height difference between the relative position of the vehicle component 16 and the rectangular rod 20 can be measured according to the scale line on the calibration rod 30, realizing the measurement of different parts of the vehicle component 16 and providing data for the calibration of the vehicle component 16.

[0033] Although this specification is described according to the embodiments, not each embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automotive component welding fixture position calibration device, comprising a base (1), characterized in that: On the upper surface of the base (1), two end seats (2) are symmetrically installed. Between the two end seats (2), there are two symmetrically arranged supports (40). On the opposite sides of the two end seats (2), first cylinders (7) are rotatably installed. The movable ends of the first cylinders (7) are rotatably installed with U-shaped frames (9). The U-shaped frames (9) are rotatably installed at the upper ends of the end seats (2). At both ends of the U-shaped frame (9), a first end pressing rod (10) and a second end pressing rod (15) for pressing the automotive component (16) are respectively installed. Below the first end pressing rod (10) and the second end pressing rod (15), a first end supporting rod (31) and a second end supporting rod (17) for supporting the automotive component (16) are respectively provided. The first end supporting rod (31) and the second end supporting rod (17) are connected to the end seat (2). On the sides of the two supports (40) facing away from the automotive component (16), second cylinders (14) are rotatably installed. The movable ends of the second cylinders (14) are rotatably installed with pressing arms (11). The pressing arms (11) are rotatably installed at the tops of the supports (40). On the lower surface of the pressing arm (11), a first middle pressing rod (12) and a second middle pressing rod (13) for pressing the automotive component (16) are installed. The first middle pressing rod (12) is arranged on the side of the pressing arm (11) close to the second cylinder (14). Below the first middle pressing rod (12) and the second middle pressing rod (13), a first middle supporting rod (32) and a second middle supporting rod (29) for lifting the automotive component (16) are respectively provided. The first middle supporting rod (32) and the second middle supporting rod (29) are connected to the support (40). On one side surface of the second end pressing rod (15) and one side surface of the second middle pressing rod (13), rectangular holes (28) are respectively opened. A calibration member is inserted into the rectangular hole (28). The calibration member includes a rectangular rod (20). A rectangular rod (20) is inserted into the rectangular hole (28). One end of the rectangular rod (20) is provided with a horizontally arranged through hole. The cross-section of the through hole is rectangular. An adjusting rod (19) with a rectangular cross-section is inserted into the through hole. The adjusting rod (19) is arranged along the width direction of the automotive component (16). One end of the adjusting rod (19) close to the automotive component (16) is installed with a rectangular sleeve (18) through a U-shaped plate. A vertically arranged calibration rod (30) is inserted into the rectangular sleeve (18). On one side surface of the calibration rod (30), vertically arranged scale lines are processed. On the upper surface of the calibration rod (30), a vertically arranged guiding hole (37) is opened. A supporting rod (27) is inserted into the guiding hole (37). The lower end of the supporting rod (27) is installed with a rubber tip (33) in contact with the automotive component (16). The upper end of the supporting rod (27) is installed with an adjusting member for driving the supporting rod (27) to move up and down along the guiding hole (37).

2. The position calibration device for a welding fixture of an automotive component according to claim 1, characterized in that: The adjusting member includes a top plate (25). The upper end of the support rod (27) is provided with a detachable top plate (25). An elastic cord (26) is installed on the lower surface of the top plate (25). The lower end of the elastic cord (26) is connected to the calibration rod (30). A circular cavity is formed on one side of the adjusting rod (19) along the length direction of the adjusting rod (19). A connecting pipe (21) identical to the circular cavity is installed at one end of the adjusting rod (19) close to the rectangular sleeve (18). An air cylinder (22) is installed at the upper end of the connecting pipe (21). A piston (39) is slidably installed in the air cylinder (22). A push rod (24) is installed at the middle position of the upper surface of the piston (39). The upper end of the air cylinder (22) is threadedly connected with a cylinder cover (23). A small hole is formed at the middle position of the upper surface of the cylinder cover (23). The upper end of the push rod (24) penetrates through the small hole and contacts the lower surface of the top plate (25). A hollow pipe (34) is installed at one end of the adjusting rod (19) away from the rectangular sleeve (18). The hollow pipe (34) communicates with the circular cavity. A rubber air bag (41) connected and fixed to the hollow pipe (34) is sleeved on the hollow pipe (34). A plurality of ventilation holes (35) are evenly formed on the outer surface of the hollow pipe (34). A support ring (42) connected and fixed to the support rod (27) is sleeved on the lower end of the support rod (27). The support ring (42) is arranged below the calibration rod (30).

3. The position calibration device for a welding fixture of an automotive component according to claim 2, wherein: A first plane (36) is formed on the outer surface of the support rod (27) along the length direction of the support rod (27). A second plane (38) arranged vertically is formed in the guide hole (37). The first plane (36) is attached to the second plane (38).

4. The position calibration device for a welding fixture of an automotive component according to claim 1, characterized in that: A rubber sleeve (3) adhered to the rectangular rod (20) is sleeved on the rectangular rod (20). The cross section of the rubber sleeve (3) is rectangular. The rubber sleeve (3) is attached to the inner wall of the rectangular hole (28).

5. The position calibration device for an automobile part welding fixture according to claim 1, wherein: Support wheels (4) are installed at the four corners of the lower surface of the base (1). A push handle (5) is installed at one side edge of the upper surface of the base (1). A label box (6) is installed on the side surface of the push handle (5) facing away from the base (1). A plurality of cross bars (8) are installed on one side of the label box (6). The ends of the cross bars (8) are connected and fixed to the push handle (5).

6. A position calibration device for a welding fixture of an automotive component according to claim 1, characterized in that: The lower end of the first end pressing rod (10) is machined with a first inclined surface that mates with the automotive component (16). The lower end of the second end pressing rod (15) is machined with a second inclined surface that mates with the automotive component (16). The upper end of the first end supporting rod (31) is machined with a third inclined surface that mates with the automotive component (16). The upper end of the second end supporting rod (17) is machined with a fourth inclined surface that mates with the automotive component (16). The lower end of the first intermediate pressing rod (12) is machined with a fifth inclined surface that mates with the automotive component (16). The lower end of the second intermediate pressing rod (13) is machined with a sixth inclined surface that mates with the automotive component (16). The upper end of the first intermediate supporting rod (32) is machined with a seventh inclined surface that mates with the automotive component (16). The upper end of the second intermediate supporting rod (29) is machined with an eighth inclined surface that mates with the automotive component (16).

Images