Position calibration device for automobile part welding clamp

Abstract

The invention relates to the technical field of automobile welding, in particular to an automobile part welding clamp position calibration device which comprises a base, two end seats are symmetrically mounted on the upper surface of the base, two symmetrically-arranged supports are arranged between the two end seats, and first air cylinders are rotationally mounted on the back faces of the two end seats correspondingly; a U-shaped frame is rotatably installed at the movable end of the first air cylinder, a first end pressing rod and a second end pressing rod which are used for pressing the automobile part are installed at the two ends of the U-shaped frame correspondingly, second air cylinders are rotatably installed on the sides, away from the automobile part, of the two supports correspondingly, and pressing arms are rotatably installed at the movable ends of the second air cylinders. The lower surface of the pressing arm is provided with a first middle pressing rod and a second middle pressing rod which are used for pressing the automobile part, and one side face of the second end pressing rod and one side face of the second middle pressing rod are each provided with a rectangular hole. And the measurement precision and the measurement efficiency are improved.

Description

Technical Field

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

[0002] Calibration of the position of the welding fixture of automobile parts is a very important process, which is the key to ensure welding quality and production efficiency. Install the welding fixture on the workbench to ensure that the fixing point of the fixture is firm and reliable. Then use the measuring tool to accurately measure the key parts of the automobile parts and the fixture to ensure that the position of each part meets the design requirements. Use high-precision measuring tools and take the average value of multiple measurements to reduce errors. When manually measuring with measuring tools, there is a need to repeatedly find the reference point, which increases the measurement error on the one hand and reduces the measurement efficiency on the other. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention aims to provide a position calibration device for a welding fixture of an automobile component to solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: a device for calibrating the position of a welding fixture for automobile parts, comprising a base, two end seats are symmetrically installed on the upper surface of the base, two symmetrically arranged supports are arranged between the two end seats, first cylinders are rotatably installed on the back surfaces of the two end seats, a U-shaped frame is rotatably installed on the movable end of the first cylinder, the U-shaped frame is rotatably installed on the upper end of the end seat, a first end pressure rod and a second end pressure rod for pressing the automobile part are respectively installed at both ends of the U-shaped frame, a first end support rod and a second end support rod (17) for supporting the automobile part are respectively arranged on the lower side of the first end pressure rod and the lower side of the second end pressure rod, the first end support rod, the first end support rod and the second end support rod are respectively arranged on the lower side of the first end pressure rod and the second end pressure rod. The two end support rods are connected to the end seats, and a second cylinder is rotatably installed on the side of the two supports facing away from the automobile parts, and a pressure arm is rotatably installed on the movable end of the second cylinder, and the pressure arm is rotatably installed on the top of the support, and the first intermediate pressure rod and the second intermediate pressure rod for pressing the automobile parts are installed on the lower surface of the pressure arm, and the first intermediate pressure rod is arranged on the side of the pressure arm close to the second cylinder, and the first intermediate pressure rod and the second intermediate pressure rod are respectively provided on the lower side of the first intermediate pressure rod and the lower side of the second intermediate pressure rod for lifting the automobile parts, the first intermediate support rod and the second intermediate support rod are connected to the support, and rectangular holes are opened on one side of the second end pressure rod and one side of the second intermediate pressure rod, and calibration parts are inserted in the rectangular holes.

[0005] Specifically, the calibration part includes a rectangular rod, a rectangular rod is inserted in the rectangular hole, a horizontally arranged through hole is opened at one end of the rectangular rod, the cross-section of the through hole is rectangular, an adjusting rod with a rectangular cross-section is inserted in the through hole, the adjusting rod is arranged along the width direction of the automobile component, a rectangular sleeve is installed at the end of the adjusting rod close to the automobile component through a U-shaped plate, a vertically arranged calibration rod is inserted in the rectangular sleeve, a side surface of the calibration rod is processed with vertically arranged scale lines, a vertically arranged guide hole is opened on the upper surface of the calibration rod, a support rod is inserted in the guide hole, a rubber tip in contact with the automobile component is installed at the lower end of the support rod, and an adjusting part for driving the support rod to move up and down along the guide hole is installed at the upper end of the support rod.

[0006] The cam is provided with a plurality of holes, the upper end of which is provided with a plurality of holes, the upper end of which is provided with a plurality of holes, the upper end of which is provided with a plurality of holes, the upper end of which is provided with a plurality of holes.

[0007] Specifically, a first plane is formed on the outer surface of the support rod, the first plane is arranged along the length direction of the support rod, and a second plane is formed in the guide hole and arranged vertically, and the first plane is in contact with 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 fits 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 edge of the upper surface of the base, a label box is installed on the side of the push handle away from the base, and multiple cross bars are installed on one side of the label box, and the ends of the cross bars are connected and fixed to the push handle.

[0010] Specifically, the lower end of the first end pressure rod is processed with a first inclined surface that matches the automobile component, the lower end of the second end pressure rod is processed with a second inclined surface that matches the automobile component, the upper end of the first end support rod is processed with a third inclined surface that matches the automobile component, the upper end of the second end support rod is processed with a fourth inclined surface that matches the automobile component, the lower end of the first intermediate pressure rod is processed with a fifth inclined surface that matches the automobile component, the lower end of the second intermediate pressure rod is processed with a sixth inclined surface that matches the automobile component, the upper end of the first intermediate support rod is processed with a seventh inclined surface that matches the automobile component, and the upper end of the second intermediate support rod is processed with an eighth inclined surface that matches the automobile component.

[0011] Beneficial effects of the present invention:

[0012] 1. Place two automobile parts on two end seats and two supports, and then control the first cylinder and the second cylinder to extend, and then after the first cylinder is extended, the first end pressure rod and the second end pressure rod are driven to move downward through the U-shaped frame, so that the first end pressure rod and the second end pressure rod cooperate with the first end support rod and the second end support rod to achieve clamping and limiting the ends of the two automobile parts that are far away from each other, and after the second cylinder is extended, the first intermediate pressure rod and the second intermediate pressure rod are driven to move downward through the pressure arm, so that 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 the ends of the two automobile parts that are close to each other.

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

[0014] 3. Rectangular holes are provided on the second end pressure rod and the second intermediate pressure rod, so as to facilitate the adjustment of the relative position of the rectangular rod and the automobile component as needed. Since the rectangular holes on the second end pressure rod and the second intermediate pressure rod are at the same level, it is not necessary to spend much energy to adjust the measurement reference point when adjusting the position of the rectangular rod. The position of the rectangular rod is adjusted along the rectangular hole, and then the relative position of the calibration rod and the automobile component is changed, so that the relative position of the calibration rod and the automobile component can be adjusted as needed.

[0015] 4. The adjusting rod is moved along the perforation, and 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 automobile part, so that the calibration rod can be moved to different parts of the automobile part without adjusting the measurement reference point, thereby improving the measurement accuracy and efficiency.

[0016] 5. When the relative position of the calibration rod and the automobile component needs to be adjusted, the rubber airbag is squeezed by hand, so that the air in the rubber airbag enters the air cylinder through the channel formed by the air vent, the hollow tube, the circular cavity and the connecting tube. Then, the piston moves upward in the air cylinder under the top pressure of the air, so that the top rod lifts the top plate. At this time, the elastic rope is stretched, and the support rod moves upward along the guide hole. When the support ring contacts the calibration rod, the support ring forces the calibration rod to move upward along the rectangular sleeve, so that the rubber tip moves upward without contacting the automobile component, realizing a structure formed by the calibration rod and the support rod that is conveniently lifted. When the rubber airbag is restored to its original state, the support rod is moved downward under the action of the elastic rope until the rubber tip is connected to the automobile component. Then, the height difference between the relative position of the automobile component and the rectangular rod can be measured according to the scale line on the calibration rod, so as to realize the measurement of different parts of the automobile component and provide data for the calibration of the automobile component. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 1 It is a structural schematic diagram of a position calibration device for welding fixtures of automobile parts according to the present invention;

[0019] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 A three-dimensional diagram of a position calibration device for welding fixtures of automobile parts according to the present invention from another viewing angle;

[0021] Figure 4 A three-dimensional diagram of an automobile component in a position calibration device for an automobile component welding fixture according to the present invention;

[0022] Figure 5 It is a schematic diagram of assembling an adjusting rod, a connecting pipe, a supporting rod, a calibration rod and a rectangular rod in a position calibration device for a welding fixture of an automobile part according to the present invention;

[0023] Figure 6 It is a schematic diagram of assembling a support rod, a rectangular sleeve, a hollow tube, an adjustment rod and a rectangular rod in a position calibration device for a welding fixture of an automobile part according to the present invention;

[0024] Figure 7 A three-dimensional diagram of a calibration rod in a position calibration device for a welding fixture for automobile parts according to the present invention;

[0025] Figure 8 It is a schematic diagram of the assembly of a piston, a push rod, a cylinder cover and a gas cylinder in a position calibration device for a welding fixture of an automobile part 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 Figure 1-Figure 4Two end seats 2 are symmetrically installed on the upper surface of the base 1, and two symmetrically arranged supports 40 are arranged between the two end seats 2. The first cylinder 7 is rotatably installed on the back surfaces of the two end seats 2, and a U-shaped frame 9 is rotatably installed on the movable end of the first cylinder 7. The U-shaped frame 9 is rotatably installed on the upper end of the end seat 2. The two ends of the U-shaped frame 9 are respectively installed with a first end pressure rod 10 and a second end pressure rod 15 for pressing the automobile component 16. The lower side of the first end pressure rod 10 and the lower side of the second end pressure rod 15 are respectively provided with a first end support rod 31 and a second end support rod 17 for supporting the automobile component 16. The first end support rod 31 and the second end support rod 17 are connected to the end seat 2, and the two supports 40 are away from the automobile component 16. A second cylinder 14 is rotatably mounted on one side, a pressure arm 11 is rotatably mounted on the movable end of the second cylinder 14, the pressure arm 11 is rotatably mounted on the top of the support 40, a first intermediate pressure rod 12 and a second intermediate pressure rod 13 for pressing the automobile component 16 are mounted on the lower surface of the pressure arm 11, the first intermediate pressure rod 12 is arranged on the side of the pressure arm 11 close to the second cylinder 14, a first intermediate support rod 32 and a second intermediate support rod 29 for lifting the automobile component 16 are respectively arranged on the lower side of the first intermediate pressure rod 12 and the lower side of the second intermediate pressure rod 13, the first intermediate support rod 32 and the second intermediate support rod 29 are connected to the support 40, the lower end of the first end pressure rod 10 is processed with a first inclined surface matching the automobile component 16, and the second end The lower end of the head pressure rod 15 is processed with a second inclined surface that matches the automobile component 16, the upper end of the first end support rod 31 is processed with a third inclined surface that matches the automobile component 16, the upper end of the second end support rod 17 is processed with a fourth inclined surface that matches the automobile component 16, the lower end of the first intermediate pressure rod 12 is processed with a fifth inclined surface that matches the automobile component 16, the lower end of the second intermediate pressure rod 13 is processed with a sixth inclined surface that matches the automobile component 16, the upper end of the first intermediate support rod 32 is processed with a seventh inclined surface that matches the automobile component 16, and the upper end of the second intermediate support rod 29 is processed with an eighth inclined surface that matches the automobile component 16. Place two automobile components 16 on two end seats 2 and two supports 40, and then The first cylinder 7 and the second cylinder 14 are controlled to extend, and then after the first cylinder 7 is extended, the first end pressure rod 10 and the second end pressure rod 15 are driven to move downward through the U-shaped frame 9, so that the first end pressure rod 10 and the second end pressure rod 15 cooperate with the first end support rod 31 and the second end support rod 17 to achieve the clamping and limiting of the ends of the two automobile parts 16 that are far away from each other. After the second cylinder 14 is extended, the first intermediate pressure rod 12 and the second intermediate pressure rod 13 are driven to move downward through the pressure arm 11, so that the first intermediate pressure rod 12 and the second intermediate pressure rod 13 cooperate with the first intermediate support rod 32 and the second intermediate support rod 29 to achieve the clamping and limiting of the ends of the two automobile parts 16 that are close to each other.

[0030] See also Figure 1-Figure 8A rectangular hole 28 is provided on one side of the second end pressure rod 15 and one side of the second intermediate pressure rod 13. A rectangular rod 20 is inserted in 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 fits the inner wall of the rectangular hole 28. The rectangular rod 20 is inserted in 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 moving along the rectangular hole 28 at will. The rectangular rod 20 and the rectangular hole 28 cooperate with each other to prevent the calibration rod 30 from rotating at will, so that the calibration rod 30 is in a vertical state.

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

[0032] See also Figure 1-Figure 8A detachable top plate 25 is installed on the upper end of the support rod 27, an elastic rope 26 is installed on the lower surface of the top plate 25, and the lower end of the elastic rope 26 is connected to the calibration rod 30. A circular cavity arranged along the length direction of the adjusting rod 19 is opened on one side of the adjusting rod 19, and a connecting pipe 21 identical to the circular cavity is installed on the end of the adjusting rod 19 close to the rectangular sleeve 18. A gas cylinder 22 is installed on the upper end of the connecting pipe 21, and a piston 39 is slidably installed in the gas cylinder 22. A push rod 24 is installed in the middle position of the upper surface of the piston 39. A cylinder cover 23 is threadedly connected to the upper end of the gas cylinder 22, and a small hole is opened in the middle position of the upper surface of the cylinder cover 23. The upper end of the rod 24 passes through a small hole and contacts the lower surface of the top plate 25. A hollow tube 34 is installed at the end of the adjustment rod 19 away from the rectangular sleeve 18. The hollow tube 34 is connected to the circular cavity. A rubber airbag 41 connected and fixed to the hollow tube 34 is sleeved on the hollow tube 34. A plurality of air holes 35 are evenly opened on the outer surface of the hollow tube 34. A supporting ring 42 connected and fixed to the support rod 27 is sleeved on the lower end of the support rod 27. The supporting ring 42 is arranged on the lower side of the calibration rod 30. A first plane 36 is opened on the outer surface of the support rod 27. The first plane 36 is arranged along the length direction of the support rod 27. A guide hole 37 is opened in the guide hole 37. There is a second plane 38 arranged vertically, and the first plane 36 is fitted with the second plane 38. When the relative position of the calibration rod 30 and the automobile component 16 needs to be adjusted, the rubber airbag 41 is squeezed by hand, so that the air in the rubber airbag 41 enters the air cylinder 22 through the passage formed by the air vent 35, the hollow tube 34, the circular cavity and the connecting tube 21, and then the piston 39 moves upward in the air cylinder 22 under the top pressure of the air, so that the push rod 24 pushes up the top plate 25. At this time, the elastic rope 26 is stretched, and the support rod 27 moves upward along the guide hole 37. When the support ring 42 contacts the calibration rod 30, the support ring 42 The calibration rod 30 is forced to move upward along the rectangular sleeve 18, so that the rubber tip 33 moves upward without contacting the automobile component 16, so that the structure formed by the calibration rod 30 and the support rod 27 can be easily lifted. When the rubber airbag 41 is restored to its original state, the support rod 27 is moved downward under the action of the elastic rope 26 until the rubber tip 33 is connected to the automobile component 16. Then, the height difference between the relative position of the automobile component 16 and the rectangular rod 20 can be measured according to the scale line on the calibration rod 30, so as to measure different parts of the automobile component 16 and provide data for the calibration of the automobile component 16.

[0033] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A position calibration device for a welding fixture of an automobile part, comprising a base (1), characterized in that: Two end seats (2) are symmetrically mounted on the upper surface of the base (1), two symmetrically arranged supports (40) are arranged between the two end seats (2), first cylinders (7) are rotatably mounted on the opposite sides of the two end seats (2), a U-shaped frame (9) is rotatably mounted on the movable end of the first cylinder (7), the U-shaped frame (9) is rotatably mounted on the upper end of the end seats (2), a first end pressure rod (10) and a second end pressure rod (15) for pressing the automobile component (16) are respectively mounted on both ends of the U-shaped frame (9), a first end support rod (31) and a second end support rod (17) for supporting the automobile component (16) are respectively arranged on the lower side of the first end pressure rod (10) and the lower side of the second end pressure rod (15), the first end support rod (31) and the second end support rod (17) are connected to the end seats (2), and the two supports (40) are rotatably mounted on the side away from the automobile component (16). A second cylinder (14) is provided, and a pressure arm (11) is rotatably mounted on the movable end of the second cylinder (14). The pressure arm (11) is rotatably mounted on the top of a support (40). A first intermediate pressure rod (12) and a second intermediate pressure rod (13) for pressing an automobile component (16) are mounted on the lower surface of the pressure arm (11). The first intermediate pressure rod (12) is arranged on a side of the pressure arm (11) close to the second cylinder (14). A first intermediate support rod (32) and a second intermediate support rod (29) for lifting the automobile component (16) are respectively arranged on the lower side of the first intermediate pressure rod (12) and the lower side of the second intermediate pressure rod (13). The first intermediate support rod (32) and the second intermediate support rod (29) are connected to the support (40). A rectangular hole (28) is provided on one side of the second end pressure rod (15) and one side of the second intermediate pressure rod (13). A calibration piece is inserted in the rectangular hole (28).

2. The position calibration device for welding fixture of automobile parts according to claim 1, characterized in that: The calibration piece comprises a rectangular rod (20), the 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 automobile component (16), and a rectangular sleeve (18) is installed at one end of the adjusting rod (19) close to the automobile component (16) through a U-shaped plate, and the rectangular sleeve (18) is provided with a plurality of holes. A vertically arranged calibration rod (30) is inserted, a side surface of the calibration rod (30) is processed with a vertically arranged scale line, a vertically arranged guide hole (37) is opened on the upper surface of the calibration rod (30), a support rod (27) is inserted in the guide hole (37), a rubber tip (33) in contact with the automobile component (16) is installed at the lower end of the support rod (27), and an adjusting member for driving the support rod (27) to move up and down along the guide hole (37) is installed at the upper end of the support rod (27).

3. The position calibration device for welding fixture of automobile parts according to claim 2, characterized in that: The adjusting member comprises a top plate (25), a detachable top plate (25) is mounted on the upper end of the support rod (27), an elastic rope (26) is mounted 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 arranged along the length direction of the adjusting rod (19) is opened on one side of the adjusting rod (19), a connecting pipe (21) identical to the circular cavity is mounted on the end of the adjusting rod (19) close to the rectangular sleeve (18), an air cylinder (22) is mounted on the upper end of the connecting pipe (21), a piston (39) is slidably mounted in the air cylinder (22), a top rod (24) is mounted at the middle position of the upper surface of the piston (39), and the air cylinder (22) is provided with a connecting pipe (21) having the same shape as the circular cavity. ) is threadedly connected to the upper end of a cylinder cover (23), a small hole is opened in the middle of the upper surface of the cylinder cover (23), the upper end of the push rod (24) passes through the small hole and contacts the lower surface of the top plate (25), the end of the adjusting rod (19) away from the rectangular sleeve (18) is installed with a hollow tube (34), the hollow tube (34) is communicated with the circular cavity, the hollow tube (34) is sleeved with a rubber air bag (41) connected and fixed to the hollow tube (34), the outer surface of the hollow tube (34) is evenly opened with a plurality of air holes (35), the lower end of the support rod (27) is sleeved with a support ring (42) connected and fixed to the support rod (27), and the support ring (42) is arranged on the lower side of the calibration rod (30).

4. The position calibration device for welding fixture of automobile parts according to claim 3, characterized in that: The outer surface of the support rod (27) is provided with a first plane (36), which is arranged along the length direction of the support rod (27); a vertically arranged second plane (38) is provided in the guide hole (37), and the first plane (36) is in contact with the second plane (38).

5. The position calibration device for welding fixture of automobile parts according to claim 2, characterized in that: The rectangular rod (20) is sleeved with a rubber sleeve (3) adhered to the rectangular rod (20); the cross section of the rubber sleeve (3) is rectangular, and the rubber sleeve (3) fits the inner wall of the rectangular hole (28).

6. The position calibration device for welding fixture of automobile parts according to claim 1, characterized in that: 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) facing 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).

7. The position calibration device for welding fixture of automobile parts according to claim 1, characterized in that: The first end pressure rod (10) has a first inclined surface formed on its lower end to match the automobile component (16), the second end pressure rod (15) has a second inclined surface formed on its lower end to match the automobile component (16), the first end support rod (31) has a third inclined surface formed on its upper end to match the automobile component (16), the second end support rod (17) has a fourth inclined surface formed on its upper end to match the automobile component (16), the first intermediate pressure rod (12) has a fifth inclined surface formed on its lower end to match the automobile component (16), the second intermediate pressure rod (13) has a sixth inclined surface formed on its lower end to match the automobile component (16), the first intermediate support rod (32) has a seventh inclined surface formed on its upper end to match the automobile component (16), and the second intermediate support rod (29) has an eighth inclined surface formed on its upper end to match the automobile component (16).

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