Frame welding and positioning tool clamp

Abstract

The invention discloses a frame welding and positioning tool clamp, which relates to the technical field of welding, and comprises a fixed plate, end plates are arranged at two ends of the fixed plate in a limiting and sliding manner, positioning plates are fixedly arranged on one side walls of the two end plates respectively, and pulleys are arranged at the bottoms of the two positioning plates; a plurality of clamping assemblies and two positioning assemblies are fixedly arranged at the tops of the two movable positioning plates, two mounting plates are fixedly arranged at the top of the inserting plate, a double-shaft motor is fixedly arranged between the two mounting plates, and transmission shafts are fixedly arranged at the two ends of the double-shaft motor. Through the arrangement of the first rack, the L-shaped rack, the first gear, the third rack, the two sliding plates, the inserting plate and the first rotating shaft, the thickness of a workpiece is automatically judged according to the extension distance of the output shaft of the first air cylinder, and the thermal expansion reserved distance can be adaptively adjusted according to the characteristic that the larger the thickness of the workpiece is, the larger the thermal expansion coefficient is.

Description

Technical Field

[0001] The invention relates to the technical field of welding, in particular to a vehicle frame welding positioning fixture. Background Art

[0002] The rear subframe crossmember is a transverse support element within the vehicle's rear chassis structure, typically connecting the left and right rear subframes to enhance the vehicle's overall stability and rigidity. This crossmember plays a crucial role in safety and structural strength. Connecting the left and right rear subframes, it effectively increases the vehicle's overall load-bearing capacity and torsional bending resistance, enhancing its structural strength.

[0003] Patent number CN118544023B discloses a welding fixture for a rear subframe crossbeam assembly of an automobile, comprising a fixture table, the top of which is provided with a positioning and clamping mechanism and a welding mechanism. The welding fixture for a rear subframe crossbeam assembly of an automobile disclosed in the present invention, through the cooperation of the positioning and clamping mechanism with the welding mechanism, can not only position and align the two pipe fittings in the crossbeam with the triangular connecting strip, but also, when the welding mechanism moves downward to weld the crossbeam, guides the welding movement trajectory of the welding machine through two movable guide groups respectively cooperating with two guide grooves. The movable guide groups and the guide grooves are mutually locked and limited, thereby ensuring that the welding machine accurately welds the connection between the pipe fittings and the triangular connecting strip, greatly improving the welding accuracy and welding quality.

[0004] The above-mentioned device improves the welding accuracy of the connection by locking the guide group and the guide groove with each other. However, during the welding process, the metal is easily expanded by heat, resulting in extrusion and bulging at the connection. For workpieces that require high installation precision, it will also affect the subsequent installation. Therefore, it is particularly important to reserve a certain welding distance to reduce bulging. In addition, for welding workpieces with different thicknesses, the thermal expansion rate during the welding process will also be different. The reserved distance adjustment speed during the thermal expansion process plays a particularly important role in affecting the quality of the welding process. Summary of the Invention

[0005] The technical solution of the present invention addresses the technical problem that the existing technical solutions are too simple, and provides a solution that is significantly different from the existing technology. Specifically, the purpose of the present invention is to provide a frame welding positioning fixture to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a vehicle frame welding positioning fixture, comprising a fixed plate, end plates are provided at both ends of the fixed plate for limiting sliding, positioning plates are fixedly provided on one side wall of the two end plates, pulleys are provided at the bottom of the two positioning plates, a number of clamping components and two positioning components are fixedly provided on the top of the two movable positioning plates, two mounting plates are fixedly provided on the top of the plug-in plate, a dual-axis motor is fixedly provided between the two mounting plates, transmission shafts are fixedly provided at both ends of the dual-axis motor, adjustment mechanisms are provided at the ends of the two transmission shafts, limiting mechanisms are fixedly provided on the tops of the two end plates, and linkage mechanisms are provided on the tops of the two positioning plates.

[0007] Preferably, each of the clamping assemblies includes two connecting rods, a first cylinder, a U-shaped plate, a hinged rod and a pressure rod, the U-shaped plate is fixedly arranged on the top of the positioning plate, the cylinder is fixedly arranged on the top of the positioning plate, the hinged rod is fixedly arranged on the end of the output shaft of the first cylinder, the pressure rod is hingedly arranged in the middle of the hinged rod, and the two ends of the two connecting rods are respectively rotatably arranged on the top of the U-shaped plate and the side wall of the pressure rod.

[0008] Preferably, the two positioning assemblies each include a second cylinder, a positioning frame, a mounting frame and a pressure plate, the positioning frame is fixedly set on the top of the positioning plate, the mounting frame is fixedly set on the top of the positioning frame, the second cylinder is fixedly set on the top of the mounting frame, and the pressure plate is fixedly set on the end of the second cylinder output shaft.

[0009] Preferably, a side plate is fixedly provided on the top of the two positioning plates, and the two linkage mechanisms include a first rack, an L-shaped rack, a first gear, a third rack, two sliding plates, a plug-in plate and a first rotating shaft. The first rotating shaft is rotatably provided on the side wall of the side plate, the first gear is fixedly provided on the first rotating shaft, the L-shaped rack is fixedly provided on the side wall of the hinge rod, the two sliding plates are slidably provided on the top of the positioning plate, the third rack is fixedly provided on the top of the two sliding plates, the plug-in plate is fixedly provided on the top of the positioning plate, the first rack is movably sleeved on the plug-in plate, and the first gear is respectively engaged with the first rack, the L-shaped rack and the third rack.

[0010] Preferably, the two adjusting mechanisms each include a first bevel gear, a limiting groove, two oblique grooves, two L-shaped plates, a limiting rod, a special-shaped rod, a fourth gear, a fourth rack and a second bevel gear. The first bevel gear is fixedly arranged at the end of the transmission shaft, the two L-shaped plates are fixedly arranged on the top of the fixed plate, the two oblique grooves are arranged on the two L-shaped plates, the limiting groove is arranged on the side wall of the first rack, one end of the special-shaped rod is limited and slidably arranged in the limiting groove, the fourth gear is rotatably arranged at the other end of the special-shaped rod, a rotating column is fixedly arranged at the center of the fourth gear, the second bevel gear is fixedly arranged at the other end of the rotating column, and the fourth rack is limited and slidably arranged on the side wall of the special-shaped rod.

[0011] Preferably, the first bevel gear and the second bevel gear are meshed with each other.

[0012] Preferably, the limiting mechanism includes a sleeve rod, a vertical plate, a connecting rod, a telescopic rod and a telescopic plate, the vertical plate is fixedly set on the top of the end plate, the sleeve rod is fixedly set on the top of the vertical plate, the connecting rod is fixedly set on the end of the third rack, one end of the telescopic rod is fixedly set on the end of the fourth rack, and both ends of the telescopic plate are respectively fixedly set on the other end of the telescopic rod and the bottom of the sleeve rod.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) The present invention realizes automatic determination of the thickness of the workpiece based on the extension distance of the output shaft of the first cylinder by arranging the first rack, the L-shaped rack, the first gear, the third rack, the two sliding plates, the plug-in plate and the first rotating shaft, so as to facilitate the subsequent adjustment of the thermal expansion reserve distance according to the characteristic that the thicker the workpiece, the greater the thermal expansion coefficient;

[0015] (2) The present invention realizes welding of workpieces of different thicknesses by arranging the first bevel gear, the limiting groove, the two inclined grooves, the two L-shaped plates, the limiting rod, the special-shaped rod, the fourth gear, the fourth rack and the second bevel gear. Accordingly, as thermal expansion gradually occurs during the welding process, the speed is adjusted according to the reserved distance matched with the thermal expansion speed of different thicknesses, thereby achieving welding quality assurance while avoiding welding bulges, making the weld more beautiful;

[0016] (3) The present invention realizes automatic adjustment of the corresponding thermal expansion reserved distance according to the thickness of the workpiece by setting the sleeve rod, the vertical plate, the plug rod, the telescopic rod and the telescopic plate, thereby avoiding serious bulging at the welding point of thicker workpieces and ensuring the beauty and quality of the welded workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a schematic structural diagram of the clamping assembly of the present invention;

[0019] Figure 3 It is a schematic diagram of the overall structure of the linkage mechanism of the present invention;

[0020] Figure 4 It is a schematic structural diagram of the positional relationship between the adjustment mechanism and the linkage mechanism of the present invention;

[0021] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0022] Figure 6It is a schematic cross-sectional view of the limiting mechanism of the present invention;

[0023] In the figure: 1, positioning plate; 2, clamping assembly; 21, connecting rod; 22, first cylinder; 23, U-shaped plate; 24, hinged rod; 25, pressure rod; 3, positioning assembly; 31, second cylinder; 32, positioning frame; 33, mounting frame; 34, pressure plate; 4, linkage mechanism; 41, first rack; 42, L-shaped rack; 43, first gear; 44, third rack; 45, sliding plate; 46, plug-in plate; 47, first rotating shaft; 5, limit Positioning mechanism; 51. Sleeve rod; 52. Vertical plate; 53. Connecting rod; 54. Telescopic rod; 55. Telescopic plate; 6. Adjusting mechanism; 61. First bevel gear; 62. Limiting groove; 63. Bevel groove; 64. L-shaped plate; 65. Limiting rod; 66. Special-shaped rod; 67. Fourth gear; 68. Fourth rack; 69. Second bevel gear; 7. Transmission shaft; 8. Mounting plate; 9. Dual-axis motor; 10. Side plate; 11. End plate; 12. Fixed plate. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figures 1-6, an embodiment of the present invention provides: a frame welding positioning fixture, including a fixed plate 12, end plates 11 are set at both ends of the fixed plate 12 for limiting sliding, and positioning plates 1 are fixedly set on one side wall of the two end plates 11, pulleys are set at the bottom of the two positioning plates 1, and a number of clamping components 2 and two positioning components 3 are fixedly set on the top of the two movable positioning plates 1, two mounting plates 8 are fixedly set on the top of the plug-in plate 46, a dual-axis motor 9 is fixedly set between the two mounting plates 8, transmission shafts 7 are fixedly set at both ends of the dual-axis motor 9, and adjustment mechanisms 6 are set at the ends of the two transmission shafts 7, limiting mechanisms 5 are fixedly set on the tops of the two end plates 11, and linkage mechanisms 4 are set on the tops of the two positioning plates 1. First, place the workpiece to be welded on the positioning plate 1, then fix the workpiece through the clamping assembly 2 and the positioning assembly 3, and drive the linkage mechanism 4 to work through the clamping assembly 2, and the linkage mechanism 4 drives the limiting mechanism 5 to adjust the reserved thermal expansion distance, and the synchronous linkage mechanism 4 drives the adjusting mechanism 6 to adjust the moving speed of the thermal expansion distance, and then the dual-axis motor 9 drives the transmission shaft 7 to rotate, and the transmission shaft 7 drives the adjusting mechanism 6 to work, and the adjusting mechanism 6 drives the linkage mechanism 4 and the end plate 11 to move, and the movement of the end plate 11 drives the positioning plate 1 to slide, thereby driving the spacing of the workpieces to adapt and adjust. It is worth noting that the pulley drives the positioning plate 1 to slide in a limited manner.

[0026] Specifically, each of the clamping assemblies 2 includes two connecting rods 21, a first cylinder 22, a U-shaped plate 23, a hinged rod 24, and a pressure rod 25. The U-shaped plate 23 is fixedly mounted on the top of the positioning plate 1, the cylinder is fixedly mounted on the top of the positioning plate 1, the hinged rod 24 is fixedly mounted on the end of the output shaft of the first cylinder 22, and the pressure rod 25 is hingedly mounted in the middle of the hinged rod 24. The two ends of the two connecting rods 21 are rotatably mounted on the top of the U-shaped plate 23 and the side wall of the pressure rod 25. The hinged rod 24 is driven to move by the extension of the output shaft of the first cylinder 22. The movement of the hinged rod 24 drives one end of the connecting rod 21 to rotate around the U-shaped plate 23 while driving the other end to rotate around the center of the hinged rod 24, so that the end of the pressure rod 25 presses the workpiece to position the workpiece. This achieves the positioning and fixation of the workpiece, avoiding movement during welding that would cause a decrease in welding quality.

[0027] Specifically, the two positioning assemblies 3 each include a second cylinder 31, a positioning frame 32, a mounting frame 33, and a pressure plate 34. The positioning frame 32 is fixedly mounted on the top of the positioning plate 1, the mounting frame 33 is fixedly mounted on the top of the positioning frame 32, the second cylinder 31 is fixedly mounted on the top of the mounting frame 33, and the pressure plate 34 is fixedly mounted on the end of the output shaft of the second cylinder 31. The output shaft of the second cylinder 31 extends to drive the pressure plate 34 to clamp and position the workpiece.

[0028] Specifically, the two positioning plates 1 are fixedly provided with side plates 10 on the top, and the two linkage mechanisms 4 include a first rack 41, an L-shaped rack 42, a first gear 43, a third rack 44, two sliding plates 45, a plug-in plate 46 and a first rotating shaft 47. The first rotating shaft 47 is rotatably set on the side wall of the side plate 10, the first gear 43 is fixedly set on the first rotating shaft 47, the L-shaped rack 42 is fixedly set on the side wall of the hinge rod 24, the two sliding plates 45 are slidably set on the top of the positioning plate 1, the third rack 44 is fixedly set on the top of the two sliding plates 45, the plug-in plate 46 is fixedly set on the top of the positioning plate 1, the first rack 41 is movably sleeved on the plug-in plate 46, and the first gear 43 is respectively engaged with the first rack 41, the L-shaped rack 42 and the third rack 44. The output shaft of the first cylinder 22 extends and the articulated rod 24 moves synchronously. The movement of the articulated rod 24 drives the L-shaped rack 42 to move, and the L-shaped rack 42 drives the first gear 43 to rotate. The rotation of the first gear 43 drives the first rack 41 to move downward and the third rack 44 to move toward the first cylinder 22. This realizes automatic judgment of the workpiece thickness based on the extension distance of the output shaft of the first cylinder 22, which is convenient for subsequent adaptive adjustment of the thermal expansion reserved distance based on the characteristic that the thicker the workpiece, the greater the thermal expansion coefficient.

[0029] Specifically, the two adjusting mechanisms 6 each include a first bevel gear 61, a limiting groove 62, two oblique grooves 63, two L-shaped plates 64, a limiting rod 65, a special-shaped rod 66, a fourth gear 67, a fourth rack 68 and a second bevel gear 69. The first bevel gear 61 is fixedly arranged at the end of the transmission shaft 7, the two L-shaped plates 64 are fixedly arranged on the top of the fixed plate 12, the two oblique grooves 63 are arranged on the two L-shaped plates 64, the limiting groove 62 is arranged on the side wall of the first rack 41, one end of the special-shaped rod 66 is limited and slidably arranged in the limiting groove 62, the fourth gear 67 is rotatably arranged at the other end of the special-shaped rod 66, a rotating column is fixedly arranged at the center of the fourth gear 67, the second bevel gear 69 is fixedly arranged at the other end of the rotating column, and the fourth rack 68 is limited and slidably arranged on the side wall of the special-shaped rod 66. The L-shaped rack 42 moves and drives the special-shaped rod 66 to move synchronously while sliding in the limit groove 62. The synchronous movement of the special-shaped rod 66 drives the limit rod 65 to slide in the inclined groove 63, and synchronously drives the second bevel gear 69, the fourth rack 68 and the fourth gear 67 to move synchronously. The first bevel gear 61 is driven to rotate by the transmission shaft 7, the first bevel gear 61 drives the second bevel gear 69 to rotate, the second bevel gear 69 drives the rotating column and the fourth gear 67 to rotate, and the fourth gear 67 rotates and drives the fourth rack 68 to move; it realizes welding according to workpieces of different thicknesses, and correspondingly, as thermal expansion gradually occurs during the welding process, the speed is adjusted according to the reserved distance matched with the thermal expansion speed of different thicknesses, thereby achieving welding quality assurance while avoiding welding bulges, making the weld more beautiful.

[0030] Specifically, the first bevel gear 61 and the second bevel gear 69 are meshed with each other.

[0031] Specifically, the limiting mechanism 5 includes a sleeve rod 51, a vertical plate 52, a connecting rod 53, a telescopic rod 54, and a telescopic plate 55. The vertical plate 52 is fixedly mounted on the top of the end plate 11, the sleeve rod 51 is fixedly mounted on the top of the vertical plate 52, the connecting rod 53 is fixedly mounted on the end of the third rack 44, one end of the telescopic rod 54 is fixedly mounted on the end of the fourth rack 68, and the ends of the telescopic plate 55 are respectively fixedly mounted on the other end of the telescopic rod 54 and the bottom of the sleeve rod 51. The connecting rod 53 is synchronously moved by the movement of the L-shaped rack 42, and the telescopic rod 54 and the telescopic plate 55 are moved by the movement of the fourth rack 68. The movement of the telescopic plate 55 drives the synchronous movement of the vertical plate 52, the sleeve rod 51, and the end plate 11. The movement of the end plate 11 drives the corresponding positioning plate 1 synchronously until the sleeve rod 51 moves to contact the connecting rod 53 to limit the position. This achieves automatic adjustment of the corresponding thermal expansion reserved distance according to the thickness of the workpiece, thereby avoiding severe bulging at the weld of thicker workpieces, ensuring the beauty and quality of the welded workpiece.

[0032] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A vehicle frame welding positioning fixture, comprising a fixed plate, end plates provided at both ends of the fixed plate for limited sliding, positioning plates fixedly provided on one side wall of each end plate, and pulleys provided at the bottom of each positioning plate, characterized in that: Several clamping assemblies and two positioning assemblies are fixedly provided on the top of the two movable positioning plates, two mounting plates are fixedly provided on the top of the plug-in plate, a dual-axis motor is fixedly provided between the two mounting plates, transmission shafts are fixedly provided at both ends of the dual-axis motor, adjustment mechanisms are provided at the ends of the two transmission shafts, limiting mechanisms are fixedly provided on the tops of the two end plates, and linkage mechanisms are provided on the tops of the two positioning plates.

2. The vehicle frame welding positioning fixture according to claim 1, characterized in that: Each of the clamping assemblies includes two connecting rods, a first cylinder, a U-shaped plate, a hinged rod and a pressure rod. The U-shaped plate is fixedly arranged on the top of the positioning plate, the cylinder is fixedly arranged on the top of the positioning plate, the hinged rod is fixedly arranged on the end of the output shaft of the first cylinder, and the pressure rod is hingedly arranged in the middle of the hinged rod. The two ends of the two connecting rods are respectively rotatably arranged on the top of the U-shaped plate and the side wall of the pressure rod.

3. The vehicle frame welding positioning fixture according to claim 1, characterized in that: The two positioning assemblies each include a second cylinder, a positioning frame, a mounting frame and a pressure plate. The positioning frame is fixedly arranged on the top of the positioning plate, the mounting frame is fixedly arranged on the top of the positioning frame, the second cylinder is fixedly arranged on the top of the mounting frame, and the pressure plate is fixedly arranged on the end of the second cylinder output shaft.

4. The vehicle frame welding positioning fixture according to claim 3, characterized in that: A side plate is fixedly provided on the top of the two positioning plates, and the two linkage mechanisms include a first rack, an L-shaped rack, a first gear, a third rack, two sliding plates, a plug-in plate and a first rotating shaft. The first rotating shaft is rotatably provided on the side wall of the side plate, the first gear is fixedly provided on the first rotating shaft, the L-shaped rack is fixedly provided on the side wall of the hinge rod, the two sliding plates are slidably provided on the top of the positioning plates, the third rack is fixedly provided on the top of the two sliding plates, the plug-in plate is fixedly provided on the top of the positioning plates, the first rack is movably sleeved on the plug-in plate, and the first gear is respectively engaged with the first rack, the L-shaped rack and the third rack.

5. The vehicle frame welding positioning fixture according to claim 4, characterized in that: The two adjustment mechanisms each include a first bevel gear, a limiting groove, two oblique grooves, two L-shaped plates, a limiting rod, a special-shaped rod, a fourth gear, a fourth rack and a second bevel gear. The first bevel gear is fixedly arranged at the end of the transmission shaft, the two L-shaped plates are fixedly arranged on the top of the fixed plate, the two oblique grooves are arranged on the two L-shaped plates, the limiting groove is arranged on the side wall of the first rack, one end of the special-shaped rod is limited and slidably arranged in the limiting groove, the fourth gear is rotatably arranged at the other end of the special-shaped rod, a rotating column is fixedly arranged at the center of the fourth gear, the second bevel gear is fixedly arranged at the other end of the rotating column, and the fourth rack is limited and slidably arranged on the side wall of the special-shaped rod.

6. The vehicle frame welding positioning fixture according to claim 1, characterized in that: The first bevel gear and the second bevel gear are meshed with each other.

7. The vehicle frame welding positioning fixture according to claim 1, characterized in that: The limiting mechanism includes a sleeve rod, a vertical plate, a connecting rod, a telescopic rod and a telescopic plate. The vertical plate is fixedly set on the top of the end plate, the sleeve rod is fixedly set on the top of the vertical plate, the connecting rod is fixedly set on the end of the third rack, one end of the telescopic rod is fixedly set on the end of the fourth rack, and both ends of the telescopic plate are respectively fixedly set on the other end of the telescopic rod and the bottom of the sleeve rod.

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