Welding clamp for automobile instrument board tubular beam assembly

Abstract

The utility model relates to the technical field of clamps, and discloses an automobile dashboard tubular beam assembly welding clamp which comprises a base, a vertical fixing block is fixedly connected to the upper end face of the base, two mounting frames are fixedly connected to the outer wall of one side of the vertical fixing block, an upper moving column is moved to enable an upper locking block and an upper locking groove to be separated and matched, and the vertical fixing block is fixed to the base. When an upper moving clamping block reaches the position of an upper fixing groove, an upper moving column is rotated to enable the upper moving clamping block to rotate and completely enter the upper fixing groove, an upper rotating disc is rotated, an upper rotating rod drives an upper gear to rotate, and the rotation of the upper gear drives two upper racks to move oppositely or oppositely in the horizontal direction. The upper rack slides in the upper sliding groove through the upper sliding block, the upper rack moves to drive the upper moving block to slide on the upper sliding rod, then the upper clamping block is driven to move in the upper moving groove, the upper clamping block is moved to the position where the upper clamping block is convenient to replace, the upper clamping block needing to be replaced is taken down, and the upper clamping block needing to be used is installed.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, and in particular to a welding clamp for a tube beam assembly of an automobile instrument panel. Background Art

[0002] With the rapid development of the automotive industry, increasingly higher requirements are being placed on the precision, efficiency, and automation levels of the automotive manufacturing process. As an important component of the automobile body, the instrument panel tube beam assembly undertakes the important task of supporting and fixing key components such as the instrument panel, steering wheel, and airbags. During the production process of the automobile instrument panel tube beam assembly, a welding fixture is required to clamp it to ensure the stability of the workpiece position during welding and the reliability of the welding quality.

[0003] The existing device has some disadvantages during use. For example, the existing welding fixture is usually suitable for a single model of instrument panel tube beam assembly. When clamping other models of instrument panel tube beam assemblies, the entire set of welding fixtures needs to be replaced. Replacing the entire set of welding fixtures takes a lot of time, including removing the old fixtures and installing the new ones, which will cause the production line to face long pauses and waiting, thereby reducing overall production efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a welding fixture for an automobile instrument panel tube beam assembly, so as to solve the problem that a whole set of welding fixtures needs to be replaced when welding instrument panel tube beam assemblies of different models.

[0005] The cam is fixedly mounted on the support frame, and the cam is fixedly mounted on the support frame, and the cam is fixedly mounted on the support frame.

[0006] In the above scheme, the first connecting block and the first rotating shaft are driven by the cylinder, which in turn drives the upper jaw to open and close on the vertical fixed block through the second connecting block and the second rotating shaft, thereby realizing the rapid clamping and release of the instrument panel tube beam assembly. This automated operation not only improves production efficiency, but also reduces the complexity and error rate of manual operation. The setting of the upper replacement component and the lower replacement component enables the fixture to adapt to instrument panel tube beam assemblies of different specifications and shapes. When the fixture needs to be replaced to adapt to different products, it is only necessary to replace the corresponding components without replacing the entire fixture, thereby improving the flexibility and versatility of the fixture.

[0007] The top end face of said sliding panel also is provided with an interlocking plate, and the interlocking plate is fixedly provided with a toothed connecting strip which is cooperatively connected with the toothed connecting strip. The two gears are connected with each other on both sides of the upper and lower sliding grooves, and the two gears are connected with each other with a plurality of gears respectively.

[0008] In the above scheme, rotating the upper rotating disk drives the upper rotating rod and the upper gear to rotate synchronously. The rotation of the upper gear will drive the two upper racks to move relative to or toward each other in the horizontal direction. The upper rack slides in the upper sliding groove through the upper slider, ensuring the smoothness and accuracy of the movement. At the same time, the upper rack drives the upper moving block to slide on the upper sliding rod. The movement of the upper moving block then drives the movement of the upper clamping block in the upper moving groove, thereby realizing the replacement of the upper clamping block.

[0009] The lockhole that is formed on the upper end of the lifting post is formed on the upper end of the lifting post, and the lockhole that is formed on the upper end of the lifting post is formed.

[0010] When the upper locking block is in the locked state, the elastic force of the upper spring can assist the upper locking block to remain in the upper locking groove, thereby enhancing the reliability of the locking and preventing accidental unlocking due to external force.

[0011] The axle up and down groove at two ends embeds respectively in two guide rails up and down of being made up of the groove on the attachment piece, and the tooth on the attachment piece is meshed with tooth on upper sprocket wheel, the lower sprocket. The lower sprocket is meshed with tooth on upper sprocket. The two gears are connected with each other by the two guide rails at two opposite ends of the gear train, and the two guide rails are connected with each other with a up-down knob.

[0012] In the above scheme, rotating the lower rotating disk drives the lower rotating rod and the lower gear to rotate synchronously. The rotation of the lower gear drives the two lower racks to move relative to or toward each other in the horizontal direction. The lower rack slides in the lower groove through the lower slider, ensuring the smoothness and accuracy of the movement. At the same time, the lower rack drives the lower moving block to slide on the lower sliding rod. The movement of the lower moving block then drives the movement of the lower clamping block in the lower moving groove, thereby realizing the replacement of the lower clamping block.

[0013] The axle up and down groove at two ends embeds respectively in two guide rails up and down of being made up of the groove on the attachment piece, and the tooth on the attachment piece is meshed with tooth on upper sprocket wheel, the lower sprocket. The lower sprocket. The lower sprocket. The lower sprocket. The lower sprocket. The lower sprocket. The lower sprocket. The lower sprocket. The lower sprocket. The lower sprocket.

[0014] When the locking cam is in the locked position, the spring forces the lower locking block to move into the locked position and the locking cam engages with the lower locking groove, thereby releasing the locking state of the locking block and the lower locking groove.

[0015] As a preferred embodiment of the above technical solution, an upper connecting groove is horizontally opened on the upper end surface of the upper clamping block, and upper clamping grooves are opened on the inner walls on both sides opposite to the upper connecting groove, and the two upper clamping blocks are respectively used in conjunction with the corresponding upper clamping grooves, and a lower connecting groove is horizontally opened on the lower end surface of the lower clamping block, and lower clamping grooves are opened on the inner walls on both sides opposite to the lower connecting groove, and the two lower clamping blocks are respectively used in conjunction with the corresponding lower clamping grooves.

[0016] In the above scheme, the upper and lower card blocks are moved to the specified positions, ensuring that the upper and lower card blocks are aligned with the corresponding upper connecting grooves and lower connecting grooves, and the upper and lower clamps are pushed toward the corresponding upper and lower card blocks to make them initially engaged. By moving the upper and lower card blocks to completely engage with the corresponding upper and lower card slots, a stable locking state is formed.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The utility model discloses that the user only needs to move the corresponding upper moving column and lower moving column through the upper replacement assembly and the lower replacement assembly to easily unlock and lock the corresponding upper clamp block and lower clamp block, thereby improving work efficiency and convenience of operation. In the locked state, the elastic force of the spring is used to assist the locking block to remain in the locking groove, effectively preventing accidental unlocking caused by external forces (such as vibration, impact, etc.). This design significantly enhances the reliability of the locking and ensures the stability and safety of the clamp during operation. In the process of unlocking and locking, the corresponding transmission system can be driven quickly and accurately by rotating the upper and lower rotating disks to realize the replacement of the upper clamp block and the lower clamp block. This mechanism not only improves the replacement efficiency, but also makes the operation process more flexible and can adapt to changes in different production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a welding fixture for a tube beam assembly of an automobile instrument panel;

[0020] Figure 2This is a schematic diagram of the partial structure of a welding fixture for a tube beam assembly of an automobile instrument panel;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the upper and lower clamping blocks in a welding fixture for a tube beam assembly of an automobile instrument panel;

[0022] Figure 4 This is a schematic diagram of the upper replacement component structure of a welding fixture for a tube beam assembly of an automobile instrument panel;

[0023] Figure 5 This is a schematic diagram of the structure of the lower replacement component of a welding fixture for a tube beam assembly of an automobile instrument panel;

[0024] Figure 6 This is a schematic diagram of the exploded structure of a welding fixture for a car instrument panel tube beam assembly.

[0025] In the figure: 10, base; 11, vertical fixing block; 12, mounting frame; 13, cylinder; 14, first connecting block; 15, first rotating shaft; 16, second connecting block; 17, second rotating shaft; 18, upper jaw; 19, lower jaw; 191, lower clamping block; 192, upper clamping block; 193, upper mounting groove; 194, lower mounting groove; 20, upper fixing column; 21, upper rotating disk; 22, upper rotating rod; 23, upper gear; 24, upper rack; 25, upper slider; 26, upper slide groove; 27, upper sliding rod; 28, upper fixing rod; 29, upper moving block; 291, upper moving groove; 292, upper clamping block; 30, upper moving column; 31, upper lock Stop block; 32, upper locking groove; 33, upper sliding groove; 34, upper fixed groove; 35, upper movable block; 36, upper spring; 40, lower fixed column; 41, lower rotating disk; 42, lower rotating rod; 43, lower gear; 44, lower rack; 45, lower slider; 46, lower sliding groove; 47, lower sliding rod; 48, lower fixed rod; 49, lower movable block; 491, lower movable groove; 492, lower clamping block; 50, lower movable column; 51, lower locking block; 52, lower locking groove; 53, lower sliding groove; 54, lower fixed groove; 55, lower movable block; 56, lower spring; 60, upper connecting groove; 61, upper clamping groove; 62, lower connecting groove; 63, lower clamping groove. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0027] Example 1

[0028] like Figure 1 、 Figure 2 、 Figure 4 and Figure 5As shown, the utility model provides a technical solution: a welding fixture for an automobile instrument panel tube beam assembly, comprising a base 10, a vertical fixing block 11 being fixedly connected to the upper end surface of the base 10, two mounting frames 12 being fixedly connected to the outer wall on one side of the vertical fixing block 11, the two mounting frames 12 being arranged up and down, a cylinder 13 being fixedly sleeved on the inner sides of the two mounting frames 12, a first connecting block 14 being fixedly connected to the output end of the cylinder 13, a first rotating shaft 15 being fixedly connected between the first connecting blocks 14, a second connecting block 16 being fixedly connected to one side of the upper end surface of the vertical fixing block 11, a second rotating shaft 17 being fixedly connected between the second connecting blocks 16, an upper jaw body 18 being rotatably sleeved on the outer sides of the first rotating shaft 15 and the second rotating shaft 17, a lower jaw body 19 being fixedly connected to the outer wall on the side of the top of the vertical fixing block 11 away from the cylinder 13, a lower clamping block 191 being arranged above the lower jaw body 19, and a lower clamping block 191 corresponding to the lower side of the upper jaw body 18. An upper clamping block 192 is provided at the position, and an upper mounting groove 193 and a lower mounting groove 194 are respectively opened inside the upper jaw body 18 and the lower jaw body 19. An upper replacement component and a lower replacement component are respectively provided on the upper jaw body 18 and the lower jaw body 19. During specific use, the first connecting block 14 and the first rotating shaft 15 are driven by the cylinder 13, and then the upper jaw body 18 is driven to open and close on the vertical fixed block 11 through the second connecting block 16 and the second rotating shaft 17, thereby realizing the rapid clamping and release of the instrument panel tube beam assembly. This automated operation not only improves production efficiency, but also reduces the complexity and error rate of manual operation. The setting of the upper replacement component and the lower replacement component enables the fixture to adapt to instrument panel tube beam assemblies of different specifications and shapes. When the fixture needs to be replaced to adapt to different products, it is only necessary to replace the corresponding components without replacing the entire fixture, thereby improving the flexibility and versatility of the fixture.

[0029] As an implementation method in this embodiment, Figure 1 、 Figure 4 and Figure 6As shown, the upper replacement assembly includes an upper fixed column 20 fixedly connected to one side of the upper end surface of the upper jaw body 18, an upper rotating disk 21 is provided above the upper fixed column 20, and an upper rotating rod 22 is fixedly connected to the bottom end of the upper rotating disk 21. The end of the upper rotating rod 22 away from the upper rotating disk 21 vertically penetrates the upper fixed column 20 and the upper jaw body 18, and the upper rotating rod 22 is rotatably connected to the upper fixed column 20 and the upper jaw body 18. The outer side of the end of the upper rotating rod 22 away from the upper rotating disk 21 is fixedly sleeved with an upper gear 23, and upper racks 24 are provided on both sides of the upper gear 23. The upper rack 24 is meshed with the upper gear 23 for transmission. The outer walls on both sides of the two upper racks 24 are fixedly connected to the upper sliders 25. The inner walls on both sides of the upper mounting groove 193 are corresponding to the positions of the two upper sliders 25. The upper slide grooves 26 adapted to the size of the upper sliders 25 are opened. The two upper racks 24 are slidably connected to the upper jaw 18 through the corresponding upper sliders 25. The inner walls on both sides of the upper mounting groove 193 are fixedly connected to the upper sliding rods 27. The ends of the two upper sliding rods 27 away from the inner wall of the upper mounting groove 193 are fixedly connected to the upper fixed rods. 28, and the tops of the two upper fixed rods 28 are fixedly connected to the inner top wall of the upper mounting groove 193, the two opposite ends of the two upper racks 24 are fixedly connected to the upper moving blocks 29, and the two upper moving blocks 29 are respectively slidably sleeved on the outer sides of the corresponding upper sliding rods 27, and upper moving grooves 291 are respectively opened on both sides of the lower end surface of the upper jaw 18. The two upper moving grooves 291 are connected to the upper mounting groove 193, and the inner sides of the two upper moving grooves 291 are slidably connected to upper clamping blocks 292, and the tops of the two upper clamping blocks 292 are respectively fixedly connected to the bottom ends of the corresponding upper moving blocks 29 During specific use, rotating the upper rotating disk 21 drives the upper rotating rod 22 and the upper gear 23 to rotate synchronously. The rotation of the upper gear 23 will drive the two upper racks 24 to move relative to or toward each other in the horizontal direction. The upper rack 24 slides in the upper sliding groove 26 through the upper slider 25, ensuring the stability and accuracy of the movement. At the same time, the upper rack 24 drives the upper moving block 29 to slide on the upper sliding rod 27. The movement of the upper moving block 29 then drives the upper clamping block 292 to move in the upper moving groove 291, thereby realizing the replacement of the upper clamping block 192.

[0030] As an implementation method in this embodiment, Figure 6The cam 33 is provided with a plurality of locking plates 31 on one side of the upper handle 21 and a plurality of locking plates 32 on the other side of the upper handle 21. The cam 33 is provided with a plurality of locking plates 31 on the other side of the upper handle 21. The cam 33 is provided with a plurality of locking plates 31 on the other side of the upper handle 21. When the locking cam 35 is in the locked state, the locking cam 31 is locked in the locking groove 32, and the locking cam 31 is in the locked state.

[0031] As an implementation method in this embodiment, Figure 1 、 Figure 5 and Figure 6As shown, the lower replacement assembly includes a lower fixed column 40 fixedly connected to the lower end surface of the lower jaw body 19, a lower rotating disk 41 is provided below the lower fixed column 40, and a lower rotating rod 42 is fixedly connected to the top of the lower rotating disk 41. The end of the lower rotating rod 42 away from the lower rotating disk 41 vertically penetrates the lower fixed column 40 and the lower jaw body 19, and the lower rotating rod 42 is rotatably connected to the lower fixed column 40 and the lower jaw body 19, and the outer side of the end of the lower rotating rod 42 away from the lower rotating disk 41 is fixedly sleeved with a lower gear 43, and lower racks 44 are provided on both sides of the lower gear 43. The rack 44 is meshed with the lower gear 43 for transmission. The outer walls on both sides of the two lower racks 44 are fixedly connected to the lower sliders 45. The inner walls on both sides of the lower mounting groove 194 are corresponding to the positions of the two lower sliders 45. A lower sliding groove 46 adapted to the size of the lower sliders 45 is opened. The two lower racks 44 are slidably connected to the lower jaw 19 through the corresponding lower sliders 45. The inner walls on both sides of the lower mounting groove 194 are fixedly connected to the lower sliding rods 47. The ends of the two lower sliding rods 47 away from the inner wall of the lower mounting groove 194 are fixedly connected to the lower fixed rods 4 8, and the bottom ends of the two lower fixed rods 48 are fixedly connected to the bottom wall of the lower mounting groove 194, the two opposite ends of the two lower racks 44 are fixedly connected with lower moving blocks 49, and the two lower moving blocks 49 are respectively slidably sleeved on the outer sides of the corresponding lower sliding rods 47, and lower moving grooves 491 are respectively opened on both sides of the upper end surface of the lower jaw body 19, the two lower moving grooves 491 are connected to the lower mounting groove 194, and the inner sides of the two lower moving grooves 491 are slidably connected with lower clamping blocks 492, and the bottom ends of the two lower clamping blocks 492 are respectively fixedly connected to the top ends of the corresponding lower moving blocks 49, During specific use, rotating the lower rotating disk 41 drives the lower rotating rod 42 and the lower gear 43 to rotate synchronously. The rotation of the lower gear 43 will drive the two lower racks 44 to move relative to or toward each other in the horizontal direction. The lower rack 44 slides in the lower groove 46 through the lower slider 45, ensuring the smoothness and accuracy of the movement. At the same time, the lower rack 44 drives the lower moving block 49 to slide on the lower sliding rod 47. The movement of the lower moving block 49 then drives the lower clamping block 492 to move in the lower moving groove 491, thereby realizing the replacement of the lower clamping block 191.

[0032] As an implementation method in this embodiment, Figure 6The lower locking block 51 is fixedly connected to the lower fixed column 40 on the outer side of the lower fixed column 40, and the lower locking block 51 is fixedly connected to the lower fixed column 40 in an annular array on one side of the lower rotating disk 41. The lower rotating disk 41 is provided with a plurality of lower locking grooves 52 on the side of the lower moving column 50. The lower locking block 51 and the lower locking groove 52 are used in conjunction with each other. When the locking cam 55 is in the locked position, the locking cam 51 is released and the locking cam 51 is locked in the locked position.

[0033] As an implementation method in this embodiment, Figure 3 As shown, the upper end surface of the upper clamping block 192 is horizontally provided with an upper connecting groove 60, and the inner walls on both sides opposite to the upper connecting groove 60 are provided with upper clamping grooves 61, and the two upper clamping blocks 292 are respectively used in conjunction with the corresponding upper clamping grooves 61, and the lower end surface of the lower clamping block 191 is horizontally provided with a lower connecting groove 62, and the inner walls on both sides opposite to the lower connecting groove 62 are provided with lower clamping grooves 63, and the two lower clamping blocks 492 are respectively used in conjunction with the corresponding lower clamping grooves 63.

[0034] Working principle: The first connecting block 14 and the first rotating shaft 15 are driven by the cylinder 13, and then the upper jaw body 18 is driven to open and close on the vertical fixed block 11 through the second connecting block 16 and the second rotating shaft 17, so as to realize the rapid clamping and release of the instrument panel tube beam assembly, and the upper movable column 30 is moved to disengage the upper locking block 31 from the upper locking groove 32, and the upper movable block 35 slides along the upper sliding groove 33 toward the upper fixed groove 34. When the upper movable block 35 reaches the position of the upper fixed groove 34, the upper movable column 30 is rotated to rotate the upper movable block 35 and completely enter the upper fixed groove 34. When the locking state of the upper locking block 31 and the upper locking groove 32 is released, the upper rotating disk 21 is rotated to drive the upper gear 23 to rotate through the upper rotating rod 22. The rotation of the gear 23 drives the two upper racks 24 to move relative to or toward each other in the horizontal direction. During this process, the upper rack 24 slides in the upper slide groove 26 through the upper slider 25 to ensure the smoothness and accuracy of the movement. The movement of the upper rack 24 drives the upper moving block 29 to slide on the upper sliding rod 27, and then drives the upper clamping block 292 to move in the upper moving groove 291, moving the upper clamping block 292 to a position convenient for replacing the upper clamping block 192, remove the upper clamping block 192 to be replaced and install the upper clamping block 192 to be used, push the upper clamp toward the corresponding upper clamping block 292, and make them initially engaged through the upper connecting groove 60, and reverse the operation to make the upper clamping block 292 completely engage with the corresponding upper clamping groove 61 to form a stable locking state. When the replacement is completed After that, the upper moving column 30 is rotated in the opposite direction, so that the upper moving block 35 disengages from the upper fixed groove 34 and rotates back to the position of the upper sliding groove 33. The elastic force of the upper spring 36 pushes the upper moving column 30 to automatically move to the locked position, and the upper locking block 31 is re-engaged in the upper locking groove 32 to complete the locking. By moving the lower moving column 50, the lower locking block 51 is disengaged from the lower locking groove 52, and the lower moving block 55 slides along the lower sliding groove 53 toward the lower fixed groove 54. When the lower moving block 55 reaches the position of the lower fixed groove 54, the lower moving column 50 is rotated to make the lower moving block 55 rotate and completely enter the lower fixed groove 54. When the locking state of the lower locking block 51 and the lower locking groove 52 is released, the lower rotating disk 41 is rotated to drive the lower gear 43 through the lower rotating rod 42. The rotation of the lower gear 43 drives the two lower racks 44 to move relative to or toward each other in the horizontal direction. The lower rack 44 slides in the sliding groove 46 through the lower slider 45 to ensure the smoothness and accuracy of the movement. The movement of the lower rack 44 drives the lower moving block 49 to slide on the lower sliding rod 47, and then drives the lower clamping block 492 to move in the lower moving groove 491, and moves the lower clamping block 492 to a position convenient for replacing the lower clamping block 191. Remove the lower clamping block 191 to be replaced and install the lower clamping block 191 to be used. The lower clamp is pushed toward the corresponding lower clamping block 492, and they are initially engaged through the lower connecting groove 62. The reverse operation makes the lower clamping block 492 completely engage with the corresponding lower clamping groove 63 to form a stable locking state. When the replacement is completed,Rotate the lower movable column 50 in the opposite direction, so that the lower movable block 55 disengages from the lower fixed groove 54 and rotates back to the lower sliding groove 53. The elastic force of the lower spring 56 pushes the lower movable column 50 to automatically move to the locked position, and the lower locking block 51 re-engages the lower locking groove 52 to complete the locking.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.

Claims

1. A welding fixture for an automobile instrument panel tube beam assembly, comprising a base (10), characterized in that: The upper end surface of the base (10) is fixedly connected to a vertical fixing block (11), and the outer wall of one side of the vertical fixing block (11) is fixedly connected to two mounting frames (12), the two mounting frames (12) are arranged up and down, and the inner sides of the two mounting frames (12) are fixedly sleeved with a cylinder (13), and the output end of the cylinder (13) is fixedly connected to a first connecting block (14), and a first rotating shaft (15) is fixedly connected between the first connecting blocks (14), and a second connecting block (16) is fixedly connected to one side of the upper end surface of the vertical fixing block (11), and a second rotating shaft (17) is fixedly connected between the second connecting blocks (16), and the An upper jaw body (18) is rotatably sleeved on the outer sides of the first rotating shaft (15) and the second rotating shaft (17); a lower jaw body (19) is fixedly connected to the outer wall of the top of the vertical fixed block (11) away from the cylinder (13); a lower clamping block (191) is provided above the lower jaw body (19); an upper clamping block (192) is provided below the upper jaw body (18) at a position corresponding to the lower clamping block (191); an upper mounting groove (193) and a lower mounting groove (194) are respectively provided inside the upper jaw body (18) and the lower jaw body (19); an upper replacement component and a lower replacement component are respectively provided on the upper jaw body (18) and the lower jaw body (19).

2. The automobile instrument panel tube beam assembly welding fixture according to claim 1, characterized in that: The upper replacement assembly includes an upper fixed column (20) fixedly connected to one side of the upper end surface of the upper jaw body (18), an upper rotating disk (21) is provided above the upper fixed column (20), and an upper rotating rod (22) is fixedly connected to the bottom end of the upper rotating disk (21), and the end of the upper rotating rod (22) away from the upper rotating disk (21) vertically penetrates the upper fixed column (20) and the upper jaw body (18), and the upper rotating rod (22) is rotatably connected to the upper fixed column (20) and the upper jaw body (18). An upper gear (23) is fixedly sleeved on the outer side of one end of the movable rod (22) away from the upper rotating disk (21), and upper racks (24) are provided on both sides of the upper gear (23). The two upper racks (24) are meshed with the upper gear (23) for transmission. Upper sliders (25) are fixedly connected to the outer walls on both sides opposite to the two upper racks (24). Upper slides (25) are provided on the inner walls on both sides opposite to the upper mounting groove (193) at positions corresponding to the two upper sliders (25). ), the two upper racks (24) are slidably connected to the upper jaw (18) through the corresponding upper sliders (25), and the inner walls on both sides of the upper mounting groove (193) are fixedly connected with upper sliding rods (27), and the ends of the two upper sliding rods (27) away from the inner wall of the upper mounting groove (193) are fixedly connected with upper fixed rods (28), and the top ends of the two upper fixed rods (28) are fixedly connected to the inner top wall of the upper mounting groove (193). The opposite ends of the two upper racks (24) are fixedly connected. An upper moving block (29) is fixedly connected, and the two upper moving blocks (29) are respectively slidably sleeved on the outer sides of the corresponding upper sliding rods (27). Upper moving grooves (291) are respectively opened on both sides of the lower end surface of the upper jaw body (18). The two upper moving grooves (291) are connected to the upper mounting groove (193). The inner sides of the two upper moving grooves (291) are slidably connected with upper clamping blocks (292). The top ends of the two upper clamping blocks (292) are respectively fixedly connected to the bottom ends of the corresponding upper moving blocks (29).

3. The automobile instrument panel tube beam assembly welding fixture according to claim 2, characterized in that: The upper replacement assembly also includes an upper movable column (30) that is slidably sleeved on the outer side of the upper fixed column (20), and a plurality of upper locking blocks (31) are fixedly connected in an annular array on one side of the upper movable column (30) close to the upper rotating disk (21), and a plurality of upper locking grooves (32) are opened in an annular array on one side of the upper rotating disk (21) close to the upper movable column (30). The upper locking blocks (31) and the upper locking grooves (32) are used in conjunction with each other, and two upper sliding grooves (33) are vertically opened on the outer side of the upper fixed column (20), and the two upper sliding grooves (33) are symmetrically arranged. Two upper fixed grooves (34) are provided on the outer side of one end of the upper jaw body (18), and the two upper fixed grooves (34) are respectively connected to the corresponding upper sliding grooves (33). The positions of the inner side of the upper movable column (30) corresponding to the two upper sliding grooves (33) are fixedly connected with upper movable blocks (35). The upper movable column (30) is slidably connected to the upper fixed column (20) through the upper movable block (35). The outer side of the upper fixed column (20) is provided with an upper spring (36), and the upper spring (36) is arranged between the upper movable column (30) and the upper jaw body (18).

4. The automobile instrument panel tube beam assembly welding fixture according to claim 3, characterized in that: The lower replacement assembly includes a lower fixed column (40) fixedly connected to the lower end surface of the lower jaw body (19), a lower rotating disk (41) is provided below the lower fixed column (40), a lower rotating rod (42) is fixedly connected to the top of the lower rotating disk (41), and the end of the lower rotating rod (42) away from the lower rotating disk (41) vertically penetrates the lower fixed column (40) and the lower jaw body (19), and the lower rotating rod (42) is rotatably connected to the lower fixed column (40) and the lower jaw body (19). A lower gear (43) is fixedly sleeved on the outer side of one end of the rod (42) away from the lower rotating disk (41), and lower racks (44) are provided on both sides of the lower gear (43). The two lower racks (44) are meshed with the lower gear (43) for transmission. Lower sliders (45) are fixedly connected to the outer walls on both sides opposite to the two lower racks (44), and lower lower grooves (46) adapted to the size of the lower sliders (45) are opened on the inner walls on both sides opposite to the lower mounting groove (194) at positions corresponding to the two lower sliders (45). The two lower racks (44) are slidably connected to the lower jaw (19) through the corresponding lower sliders (45), and the inner walls on both sides of the lower mounting groove (194) are fixedly connected with lower sliding rods (47), and one end of the two lower sliding rods (47) away from the inner wall of the lower mounting groove (194) is fixedly connected with a lower fixed rod (48), and the bottom ends of the two lower fixed rods (48) are fixedly connected to the inner bottom wall of the lower mounting groove (194), and the opposite ends of the two lower racks (44) are fixed. A lower moving block (49) is fixedly connected, and the two lower moving blocks (49) are respectively slidably sleeved on the outer sides of the corresponding lower sliding rods (47). Lower moving grooves (491) are respectively opened on both sides of the upper end surface of the lower jaw body (19). The two lower moving grooves (491) are connected to the lower mounting groove (194). The inner sides of the two lower moving grooves (491) are slidably connected with lower clamping blocks (492). The bottom ends of the two lower clamping blocks (492) are respectively fixedly connected to the top ends of the corresponding lower moving blocks (49).

5. The automobile instrument panel tube beam assembly welding fixture according to claim 4, characterized in that: The lower replacement assembly also includes a lower movable column (50) that is slidably sleeved on the outer side of the lower fixed column (40), and a plurality of lower locking blocks (51) are fixedly connected in an annular array on one side of the lower movable column (50) close to the lower rotating disk (41), and a plurality of lower locking grooves (52) are opened in an annular array on one side of the lower rotating disk (41) close to the lower movable column (50). The lower locking blocks (51) and the lower locking grooves (52) are used in conjunction with each other, and two lower sliding grooves (53) are vertically opened on the outer side of the lower fixed column (40), and the two lower sliding grooves (53) are symmetrically arranged. Two lower fixed grooves (54) are provided on the outer side of one end of the lower jaw body (19), and the two lower fixed grooves (54) are respectively connected to the corresponding lower sliding grooves (53). The positions of the inner side of the lower movable column (50) corresponding to the two lower sliding grooves (53) are fixedly connected with lower movable blocks (55). The lower movable column (50) is slidably connected to the lower fixed column (40) through the lower movable block (55). A lower spring (56) is provided on the outer side of the lower fixed column (40), and the lower spring (56) is arranged between the lower movable column (50) and the lower jaw body (19).

6. The automobile instrument panel tube beam assembly welding fixture according to claim 4, characterized in that: An upper connecting groove (60) is transversely formed on the upper end surface of the upper clamping block (192), and upper clamping grooves (61) are formed on the inner walls on both sides opposite to the upper connecting groove (60). The two upper clamping blocks (292) are respectively used in conjunction with the corresponding upper clamping grooves (61). A lower connecting groove (62) is transversely formed on the lower end surface of the lower clamping block (191), and lower clamping grooves (63) are formed on the inner walls on both sides opposite to the lower connecting groove (62). The two lower clamping blocks (492) are respectively used in conjunction with the corresponding lower clamping grooves (63).

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