An automobile frame welding positioning fixture and welding process

Abstract

The application discloses a kind of automobile frame welding positioning fixture and welding process, it is related to automobile frame welding field, including welding table, the top surface of welding table is equipped with inner clamping mechanism, four are provided in the inner clamping mechanism, wherein one end of two inner clamping mechanisms is equipped with end clamping mechanism, one side of the inner clamping mechanism is equipped with outer clamping mechanism.The application is installed by the mounting plate of corresponding number of top pressure mechanism and linear drive mechanism according to the actual shape of the frame, the position of the top pressure mechanism is adjusted, the cylinder four control pressure rod is accurately pressed and contacted on the frame outside to be fixed, the installation of top pressure mechanism is facilitated by the setting of four linear drive mechanisms according to the needs of users, the top pressure mechanism is quickly disassembled by plug-in design, so that the application can adapt to the size and shape change of different vehicle models of frame, the frame is stably fixed and clamped, the versatility of the device is improved, and welding processing cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of automotive frame welding technology, specifically to an automotive frame welding positioning fixture and welding process. Background Technology

[0002] In the automotive manufacturing industry, the chassis, as one of the core components of a car, directly affects the vehicle's performance and safety in terms of quality and precision. A car chassis is typically composed of multiple parts that need to be welded together to form a robust whole. To ensure the precision and quality of the chassis during the welding process, welding positioning fixtures have been developed. The main function of welding positioning fixtures is to position and clamp the various components of the chassis during the welding process, ensuring the positional and dimensional accuracy of the weld joints.

[0003] With the continuous development and progress of the automotive industry, the structure and shape of car frames are becoming increasingly complex. Different car models have different frame sizes and shapes. Existing fixtures are often designed only for specific car models, lacking versatility and making it difficult to adapt to changes in frame size and shape for different car models, thus increasing production costs. Summary of the Invention

[0004] The purpose of this invention is to provide a welding positioning fixture and welding process for automobile frames, in order to solve the problem mentioned in the background art that the structure and shape of automobile frames are becoming increasingly complex, and the frame size and shape of different models vary. Existing fixtures are often designed only for specific models, lacking versatility and unable to adapt to changes in frame size and shape of different models, thus increasing production costs.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a welding positioning fixture for an automobile frame, comprising a welding table, an inner clamping mechanism mounted on the top surface of the welding table, four inner clamping mechanisms being provided, two of which each have an end clamping mechanism at one end, and an outer clamping mechanism on one side of each inner clamping mechanism, both the end clamping mechanism and the outer clamping mechanism being mounted on the top surface of the welding table, and a positioning baffle fixedly connected to the top surface of the welding table on one side of the other two inner clamping mechanisms, the positioning baffle being fixedly connected to the top surface of the welding table, an adjustment groove being formed through the top surface of the welding table, a linear drive mechanism being provided below the adjustment groove, the linear drive mechanism comprising a servo motor, a movable slot plate, a lead screw, a threaded sleeve, and a mounting plate, the mounting plate being movably connected to the inner wall of the adjustment groove, and a top plate being mounted on the top surface of the mounting plate. The pressing mechanism comprises a movable slot plate with both ends fixedly connected to the bottom surface of the welding table, a servo motor fixedly mounted on one end of the movable slot plate, a sliding groove on the top surface of the movable slot plate, a lead screw rotatably connected to the inner wall of the sliding groove, one end of the lead screw being fixedly connected to the output shaft end of the servo motor, a threaded sleeve threadedly fitted onto the outer wall of the lead screw, the outer wall of the threaded sleeve being movably connected to the inner wall of the sliding groove, and the top surface of the threaded sleeve being fixedly connected to the bottom surface of the mounting plate. The pressing mechanism includes a support plate, a connecting base, and a plug rod. The plug rod is fixedly connected to the bottom surface of the connecting base, and the connecting base is fixedly connected to the bottom surface of the support plate. A rotating groove is provided on the top surface of the mounting plate, and a plug-in block is rotatably connected to the inner wall of the rotating groove. A slot is provided on the top surface of the plug-in block, and the mounting plate is inserted into the inner wall of the slot.

[0006] Preferably, the inner wall of the rotating groove is provided with a limiting slot, and the outer wall of the plug-in block is fixedly connected with a locking block, which is movably engaged with the limiting slot.

[0007] Preferably, a cylinder four is installed on the lower outer wall of the support plate, one end of the telescopic rod of the cylinder four passes through the outer wall of the support plate and is rotatably connected to a traction rod, and a pressure rod is fixedly connected to the top end of the traction rod.

[0008] Preferably, a movable connecting rod is rotatably connected to the inner wall of the middle part of the traction rod, and a fixed connecting plate is fixedly connected to the upper outer wall of the support plate. The fixed connecting plate is rotatably connected to one end of the movable connecting rod.

[0009] Preferably, the end clamping mechanism includes a mounting block, a cylinder, and a frame pressing block. The mounting block is fixedly mounted on the top surface of the welding table, the cylinder is fixedly connected to the outer wall of the mounting block, and the frame pressing block is fixedly connected to one end of the telescopic rod of the cylinder.

[0010] Preferably, the external clamping mechanism includes a second cylinder, one end of the telescopic rod of the second cylinder is fixedly connected to a pressure plate, and the bottom surface of the second cylinder is fixedly connected to the top surface of the welding table.

[0011] Preferably, the inner clamping mechanism includes a base plate, the top surface of which is provided with a connecting guide groove, and a cylinder is installed on the inner wall of the connecting guide groove.

[0012] Preferably, one end of the telescopic rod of the cylinder three is fixedly connected to a limiting block, and the bottom end of the limiting block is movably connected to the inner wall of the connecting guide groove.

[0013] Preferably, an electrical control box is provided on one side of the positioning baffle, the electrical control box is installed on the top surface of the welding table, and support feet are fixedly connected to the four corners of the bottom surface of the welding table.

[0014] A welding process for an automobile frame includes the following steps:

[0015] S1. Clean the frame and preset the welding parameters;

[0016] S2. Place the vehicle frame component on the positioning baffle for end limiting, and use the inner clamping mechanism on one side of the positioning baffle to clamp and fix the end.

[0017] S3. Then, by using the combined use of the end clamping mechanism, the outer clamping mechanism and the inner clamping mechanism, the remaining frame components are fixedly clamped on the welding table. The position of the top pressing mechanism is adjusted by the linear drive mechanism, and the top pressing mechanism is used to press and fix the irregular edges of the frame.

[0018] S4. After all the components of the frame are positioned and clamped, automatic welding is performed according to the welding sequence and welding parameters.

[0019] S5. Clean and treat the surface impurities of the welded frame, and perform non-destructive testing on the weld joints;

[0020] S6. Finally, the welded frame is heat-treated, and the finished frame undergoes a comprehensive quality inspection.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. In this invention, the mounting plates of the corresponding number of top pressing mechanisms and linear drive mechanisms are selected and installed by plugging them together according to the actual shape of the vehicle frame. The position of the top pressing mechanism is adjusted by controlling the rotation of the threaded sleeve block driven by the servo motor and adjusting the position of the mounting plate in the adjustment groove. This allows the cylinder four control rods to accurately press and fix the vehicle frame to the outside. The four sets of linear drive mechanisms make it convenient for users to install the top pressing mechanism as needed. The plug-in design facilitates quick assembly and disassembly of the top pressing mechanism. This invention can adapt to the changes in the size and shape of the vehicle frame of different models, providing stable positioning and clamping of the vehicle frame, improving the versatility of the device, and reducing welding processing costs.

[0023] 2. In this invention, by rotating the plug block in the rotating groove, and cooperating with the locking block and the limiting slot, the top pressing mechanism can be rotated and adjusted after installation, controlling the pressing direction of the pressure rod, and providing precise clamping of irregular parts of the frame.

[0024] 3. In this invention, the inner wall of the frame end is supported and limited by the pushing of the three cylinders to the limit blocks. The frame pressure block is clamped and fixed by the first cylinder, and the side is further clamped by the second cylinder pushing the pressure plate. This improves the clamping stability of the frame, increases the stable clamping force, prevents the frame from shifting during welding, and improves the welding quality. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural schematic diagram of a welding positioning fixture for an automobile frame according to the present invention;

[0026] Figure 2 This is a side view of a welding positioning fixture for an automobile frame according to the present invention.

[0027] Figure 3 This is a schematic diagram of the linear drive mechanism for a welding positioning fixture for an automobile frame according to the present invention.

[0028] Figure 4 This is a partial structural schematic diagram of a welding positioning fixture for an automobile frame according to the present invention;

[0029] Figure 5 This is a schematic diagram of the internal structure of the movable slot plate of a welding positioning fixture for an automobile frame according to the present invention;

[0030] Figure 6 This is a schematic diagram of the top pressing mechanism and mounting plate of a welding positioning fixture for an automobile frame according to the present invention;

[0031] Figure 7 This is a schematic diagram of the internal structure of an automotive frame welding positioning fixture mounting plate according to the present invention.

[0032] In the diagram: 1. Welding table; 11. Adjustment groove; 12. Support leg; 2. End clamping mechanism; 21. Mounting block; 22. Cylinder 1; 23. Frame pressure block; 3. External clamping mechanism; 31. Cylinder 2; 32. Pressure plate; 4. Internal clamping mechanism; 41. Base plate; 42. Cylinder 3; 43. Limiting block; 44. Connecting guide groove; 5. Top pressing mechanism; 51. Support plate; 52. Connecting base; 53. Insert rod; 54. 55. Cylinder 4; 56. Traction rod; 57. Movable connecting rod; 58. Pressure rod; 6. Fixed connecting plate; 6. Linear drive mechanism; 61. Servo motor; 62. Movable slot plate; 63. Lead screw; 64. Threaded sleeve block; 65. Mounting plate; 651. Insertion block; 652. Slot; 653. Rotation slot; 654. Limiting slot; 655. Locking block; 66. Slide groove; 7. Positioning baffle; 8. Electrical control box. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1: Refer to Figure 1 - Figure 7As shown: A welding positioning fixture for automobile frames includes a welding table 1. Four inner clamping mechanisms 4 are installed on the top surface of the welding table 1. Two of the inner clamping mechanisms 4 have end clamping mechanisms 2 at one end, and outer clamping mechanisms 3 are installed on one side of each inner clamping mechanism 4. The end clamping mechanisms 2 and outer clamping mechanisms 3 are both installed on the top surface of the welding table 1. Positioning baffles 7 are fixedly connected to the top surface of the welding table 1 on one side of the other two inner clamping mechanisms 4. An adjustment groove 11 is formed through the top surface of the welding table 1. A linear drive mechanism 6 is installed below the adjustment groove 11. The linear drive mechanism 6 includes a servo motor 61, a movable slot plate 62, a lead screw 63, a threaded sleeve block 64, and a mounting plate 65. The mounting plate 65 is movably connected to the inner wall of the adjustment groove 11. A pressing mechanism 5 is installed on the top surface of the mounting plate 65. The two ends of the movable slot plate 62 are fixedly connected to the bottom surface of the welding table 1. The servo motor 61 is fixedly installed at one end of the movable slot plate 62. The top surface of the slot plate 62 has a sliding groove 66. A lead screw 63 is rotatably connected to the inner wall of the sliding groove 66. One end of the lead screw 63 is fixedly connected to the output shaft end of the servo motor 61. A threaded sleeve 64 is threadedly fitted onto the outer wall of the lead screw 63. The outer wall of the threaded sleeve 64 is movably connected to the inner wall of the sliding groove 66. The top surface of the threaded sleeve 64 is fixedly connected to the bottom surface of the mounting plate 65. The pressing mechanism 5 includes a support plate 51, a connecting base 52, and an insert rod 53. The insert rod 53 is fixedly connected to the connecting base 52. The bottom surface of the mounting plate 65 is connected to the bottom surface of the support plate 51. The top surface of the mounting plate 65 is provided with a rotating groove 653. The inner wall of the rotating groove 653 is rotatably connected to the plug block 651. The top surface of the plug block 651 is provided with a slot 652. The mounting plate 65 is inserted into the inner wall of the slot 652. The inner wall of the rotating groove 653 is provided with a limiting slot 654. The outer wall of the plug block 651 is fixedly connected to a locking block 655. The locking block 655 and the limiting slot 654 are movably locked together.

[0035] In this embodiment, by placing the frame assembly on the inner clamping mechanism 4, the inner clamping mechanism 4 is controlled to push the inner side of the frame to engage with the end clamping mechanism 2 to clamp the end of the frame. Then, the outer clamping mechanism 3 is used to further limit the side of the frame. According to the actual shape of the frame, the user selects the corresponding number of top pressing mechanisms 5 and the mounting plate 65 of the linear drive mechanism 6 for insertion and installation. By controlling the servo motor 61 to drive the threaded sleeve block 64 to rotate and adjust the position of the mounting plate 65 in the adjustment groove 11, the position of the top pressing mechanism 5 is adjusted, so that the cylinder 4 54 controls the pressure rod 57 to accurately press. The contact is fixed to the outside of the frame. The four sets of linear drive mechanisms 6 facilitate the installation of the top pressing mechanism 5 as needed by the user. The plug-in design facilitates quick installation and removal of the top pressing mechanism 5, enabling the invention to adapt to the frame size and shape changes of different models, providing stable positioning and clamping of the frame, and improving the versatility of the device. By rotating the plug block 651 in the rotating groove 653, and cooperating with the engagement between the locking block 655 and the limiting locking groove 654, the top pressing mechanism 5 can be rotated and adjusted after installation, controlling the pressing direction of the pressure rod 57, and providing precise clamping of irregular parts of the frame.

[0036] Example 2: Figure 1 - Figure 7 As shown, a cylinder 4 54 is installed on the lower outer wall of the support plate 51. One end of the telescopic rod of the cylinder 4 54 passes through the outer wall of the support plate 51 and is rotatably connected to a traction rod 55. A pressure rod 57 is fixedly connected to the top of the traction rod 55. A movable connecting rod 56 is rotatably connected to the middle inner wall of the traction rod 55. A fixed connecting plate 58 is fixedly connected to the upper outer wall of the support plate 51. The fixed connecting plate 58 is rotatably connected to one end of the movable connecting rod 56. The end clamping mechanism 2 includes a mounting block 21, a cylinder 1 22, and a frame pressure block 23. The mounting block 21 is fixedly installed on the top surface of the welding table 1. The cylinder 1 22 is fixedly connected to the outer wall of the mounting block 21. The frame pressure block 23 is fixedly connected to the outer wall of the welding table 1. One end of the telescopic rod of cylinder 22 is connected to the outer clamping mechanism 3, which includes cylinder 31. One end of the telescopic rod of cylinder 31 is fixedly connected to a pressure plate 32. The bottom surface of cylinder 31 is fixedly connected to the top surface of the welding table 1. The inner clamping mechanism 4 includes a base plate 41. A connecting guide groove 44 is opened on the top surface of the base plate 41. Cylinder 42 is installed on the inner wall of the connecting guide groove 44. One end of the telescopic rod of cylinder 42 is fixedly connected to a limiting block 43. The bottom end of the limiting block 43 is movably connected to the inner wall of the connecting guide groove 44. An electrical control box 8 is provided on one side of the positioning baffle 7. The electrical control box 8 is installed on the top surface of the welding table 1. Support feet 12 are fixedly connected to the four corners of the bottom surface of the welding table 1.

[0037] In this embodiment, cylinder 4 54 pulls the bottom end of the traction rod 55, and the movable connecting rod 56 pulls it down to make the pressure rod 57 contact the frame surface, thereby firmly clamping the top of the frame. Cylinder 3 42 pushes the limiting block 43 to support and limit the inner wall of the frame end. Cylinder 1 22 pushes the frame pressure block 23 to clamp and fix the outer wall of the frame. Cylinder 2 31 pushes the pressure plate 32 to further clamp the side, thereby improving the clamping stability of the frame, increasing the stable clamping force, preventing the frame from shifting during welding, and improving the welding quality. The electrical control box 8 facilitates the user's operation and control of the various components of the device.

[0038] Example 3: This example provides a welding process for an automobile frame, including the following steps:

[0039] Step 1: Clean the frame and preset the welding parameters;

[0040] Step 2: Place the vehicle frame component on the positioning baffle 7 for end limiting, and use the inner clamping mechanism 4 on one side of the positioning baffle 7 to clamp and fix the end.

[0041] Step 3: Then, by using the combined use of end clamping mechanism 2, outer clamping mechanism 3 and inner clamping mechanism 4, the remaining frame components are fixedly clamped on the welding table 1. The position of the top pressing mechanism 5 is adjusted by the linear drive mechanism 6, and the top pressing mechanism 5 is used to press and fix the irregular edges of the frame.

[0042] Step 4: After all components of the frame are positioned and clamped, perform automatic welding according to the welding sequence and parameters.

[0043] Step 5: Clean and treat the surface impurities of the welded frame, and perform non-destructive testing on the weld joints;

[0044] Step Six: Finally, the welded frame undergoes heat treatment, and the finished frame undergoes a comprehensive quality inspection.

[0045] The usage and working principle of this device are as follows: By placing the frame assembly on the inner clamping mechanism 4, the limit block 43 is pushed by cylinder 3 42 to support and limit the inner wall of the frame end. Cylinder 1 22 pushes the frame pressure block 23 to clamp and fix the outer wall of the frame. Cylinder 2 31 pushes the pressure plate 32 to further clamp the sides, thereby improving the clamping stability of the frame, increasing the stable clamping force, preventing frame displacement during welding, and improving welding quality. Depending on the actual shape of the frame, a corresponding number of top pressing mechanisms 5 and the mounting plate 65 of the linear drive mechanism 6 are selected for insertion and installation. The mounting plate 65 is adjusted by controlling the servo motor 61 to drive the threaded sleeve block 64 to rotate. 5. Position adjustment is performed within the adjustment groove 11 to adjust the position of the top pressing mechanism 5, so that the cylinder 4 54 controls the pressure rod 57 to accurately press and fix it to the outside of the frame. The four sets of linear drive mechanisms 6 facilitate the user's installation of the top pressing mechanism 5 as needed. The plug-in design facilitates quick assembly and disassembly of the top pressing mechanism 5, enabling the invention to adapt to the frame size and shape changes of different models and to stably position and clamp the frame. By rotating the plug block 651 in the rotating groove 653, and cooperating with the engagement between the locking block 655 and the limiting locking groove 654, the top pressing mechanism 5 can be rotated and adjusted after installation to control the pressing direction of the pressure rod 57, providing precise clamping of irregular parts of the frame.

[0046] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A welding positioning fixture for an automobile frame, comprising a welding table (1), characterized in that: The welding table (1) has an inner clamping mechanism (4) installed on its top surface. Four inner clamping mechanisms (4) are provided, two of which have an end clamping mechanism (2) at one end and an outer clamping mechanism (3) on one side. Both the end clamping mechanism (2) and the outer clamping mechanism (3) are installed on the top surface of the welding table (1). The other two inner clamping mechanisms (4) have a positioning baffle (7) on one side, which is fixedly connected to the top surface of the welding table (1). 1) The top surface of the welding table (1) is provided with an adjustment groove (11). A linear drive mechanism (6) is provided below the adjustment groove (11). The linear drive mechanism (6) includes a servo motor (61), a movable slot plate (62), a lead screw (63), a threaded sleeve (64), and a mounting plate (65). The mounting plate (65) is movably connected to the inner wall of the adjustment groove (11). A pressing mechanism (5) is installed on the top surface of the mounting plate (65). The two ends of the movable slot plate (62) are fixedly connected to the bottom surface of the welding table (1). The machine (61) is fixedly installed at one end of the movable slot plate (62). The top surface of the movable slot plate (62) is provided with a sliding groove (66). The lead screw (63) is rotatably connected to the inner wall of the sliding groove (66). One end of the lead screw (63) is fixedly connected to the output shaft end of the servo motor (61). The threaded sleeve (64) is threaded onto the outer wall of the lead screw (63). The outer wall of the threaded sleeve (64) is movably connected to the inner wall of the sliding groove (66). The top surface of the threaded sleeve (64) is fixedly connected to the bottom surface of the mounting plate (65). The pressing mechanism (5) includes a support plate (51), a connecting base (52), and a plug rod (53). The plug rod (53) is fixedly connected to the bottom surface of the connecting base (52), and the connecting base (52) is fixedly connected to the bottom surface of the support plate (51). The top surface of the mounting plate (65) is provided with a rotating groove (653). The inner wall of the rotating groove (653) is rotatably connected with a plug block (651). The top surface of the plug block (651) is provided with a slot (652), and the plug rod (53) is inserted into the inner wall of the slot (652). The inner wall of the rotating groove (653) is provided with a limiting slot (654). The outer wall of the plug-in block (651) is fixedly connected with a locking block (655). The locking block (655) and the limiting slot (654) are movably locked together. The lower outer wall of the support plate (51) is equipped with a cylinder four (54). One end of the telescopic rod of the cylinder four (54) passes through the outer wall of the support plate (51) and is rotatably connected to a traction rod (55). The top end of the traction rod (55) is fixedly connected to a pressure rod (57). The middle inner wall of the traction rod (55) is rotatably connected to a movable connecting rod (56). The upper outer wall of the support plate (51) is fixedly connected to a fixed connecting plate (58). The fixed connecting plate (58) is rotatably connected to one end of the movable connecting rod (56).

2. The automotive frame welding positioning fixture according to claim 1, characterized in that: The end clamping mechanism (2) includes a mounting block (21), a cylinder (22) and a frame pressing block (23). The mounting block (21) is fixedly mounted on the top surface of the welding table (1). The cylinder (22) is fixedly connected to the outer wall of the mounting block (21). The frame pressing block (23) is fixedly connected to one end of the telescopic rod of the cylinder (22).

3. The automotive frame welding positioning fixture according to claim 1, characterized in that: The external clamping mechanism (3) includes a second cylinder (31), one end of the telescopic rod of the second cylinder (31) is fixedly connected to a pressure plate (32), and the bottom surface of the second cylinder (31) is fixedly connected to the top surface of the welding table (1).

4. The automotive frame welding positioning fixture according to claim 1, characterized in that: The inner clamping mechanism (4) includes a base plate (41), and a connecting guide groove (44) is provided on the top surface of the base plate (41). A cylinder (42) is installed on the inner wall of the connecting guide groove (44).

5. The automotive frame welding positioning fixture according to claim 4, characterized in that: One end of the telescopic rod of the cylinder (42) is fixedly connected to the limiting block (43), and the bottom end of the limiting block (43) is movably connected to the inner wall of the connecting guide groove (44).

6. The automotive frame welding positioning fixture according to claim 4, characterized in that: An electrical control box (8) is provided on one side of the positioning baffle (7). The electrical control box (8) is installed on the top surface of the welding table (1). Support feet (12) are fixedly connected to the four corners of the bottom surface of the welding table (1).

7. A welding process for an automobile frame, characterized in that, Using the automotive frame welding positioning fixture according to any one of claims 1-6 includes the following steps: S1. Clean the frame and preset the welding parameters; S2. Place the vehicle frame component on the positioning baffle (7) for end limiting, and use the inner clamping mechanism (4) on one side of the positioning baffle (7) to clamp and fix the end. S3. Then, by using the combined use of the end clamping mechanism (2), the outer clamping mechanism (3) and the inner clamping mechanism (4), the remaining frame components are fixedly clamped on the welding table (1). The position of the top pressing mechanism (5) is adjusted by the linear drive mechanism (6), and the top pressing mechanism (5) is used to press and fix the irregular edges of the frame. S4. After all the components of the frame are positioned and clamped, automatic welding is performed according to the welding sequence and welding parameters. S5. Clean and treat the surface impurities of the welded frame, and perform non-destructive testing on the weld joints; S6. Finally, the welded frame is heat-treated, and the finished frame undergoes a comprehensive quality inspection.

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