Split axle head clamping device for friction welding

Abstract

The utility model relates to friction welding equipment technical field, and the utility model discloses split axle head clamping device for friction welding, including the holder fixed connection with chuck, the holder has holder fixed end and holder adjusting end, is equipped with the adjusting washer between holder fixed end and holder adjusting end, and holder fixed end, adjusting washer and holder adjusting end are fixedly connected through bolt, the utility model discloses the device can compensate the wear value through the thickness of adjusting washer, reduces the maintenance, replacement process, guarantees the welding quality stable and reliable while improving the adjustment efficiency, saves the debugging time and cost expense, and the utility model discloses the device can reduce the workpiece surface damage simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of friction welding equipment technology, and in particular to an improvement on a friction welding shaft head clamping device. Background Technology

[0002] Friction welding, a solid-state pressure welding method, is widely used in industrial production. It utilizes the heat generated by the friction between the contact surfaces of the workpieces to bring them to a thermoplastic state, and then rapidly applies an upsetting force to achieve welding. Friction welding has many advantages, such as stable weld quality, high dimensional accuracy, good workpiece runout after welding, and low scrap rate. Rotary friction welding is a common method, widely used in automobile production, especially in the manufacturing of shaft parts such as universal joint drive shafts for passenger cars. In welding hollow tube workpieces to shaft end workpieces, a shaft end clamping device is needed to effectively clamp the outer diameter of the large end of the shaft end, ensuring that the shaft end workpiece and chuck remain relatively stationary during machining, while the entire assembly rotates at a certain speed. Existing shaft clamping devices typically consist of three identical grippers, which are non-adjustable, integral structures fixed to the chuck. The grippers secure the shaft workpiece via clamping surfaces on their end faces, specifically by pressing these surfaces against the outer diameter of the shaft's large end. These existing clamping surfaces are generally composed of several parallel triangular teeth. The presence of sharp angles causes parallel grooves to form on the outer diameter of the shaft's large end after welding, resulting in surface roughness after painting. Furthermore, the clamping surfaces securing the shaft workpiece wear over time, causing changes in the contact position with the welded workpiece and leading to excessive workpiece runout, failing to meet process requirements. The traditional method is to replace or repair the worn shaft clamping devices. However, manufacturing grippers is time-consuming, and repeated adjustments after replacement increase maintenance costs and delay production. Utility Model Content

[0003] The purpose of this invention is to provide a split-type shaft head clamping device for friction welding. Using this device can reduce damage to the outer surface of the workpiece, and by adjusting the thickness of the clamp, wear value can be compensated, reducing the need for replacement and maintenance of the clamp, thereby improving efficiency and reducing costs.

[0004] The purpose of this utility model is achieved through the following technical solution: a split-type shaft head clamping device for friction welding, including a clamp fixedly connected to a chuck, characterized in that: the clamp has a clamp fixed end and a clamp adjusting end, an adjusting shim is provided between the clamp fixed end and the clamp adjusting end, and the clamp fixed end, the adjusting shim and the clamp adjusting end are fixedly connected by bolts.

[0005] Furthermore, the fixed end of the clamp is provided with a positioning block, and the adjusting end of the clamp is provided with a positioning groove that matches and presses against the positioning block; or the fixed end of the clamp is provided with a positioning groove, and the adjusting end of the clamp is provided with a positioning block that matches and presses against the positioning groove.

[0006] Furthermore, the end face of the clamping adjustment end is a clamping curved surface, which is composed of several trapezoidal columns that are parallel to the axial direction of the large outer circle of the shaft head and have trapezoidal teeth in cross section. The tooth tip of the trapezoidal teeth is a curved surface that matches the large outer circle of the shaft head.

[0007] This invention has the following advantages: When the wear of the shaft head clamping device fails to meet the processing quality requirements, the wear value can be compensated by adjusting the thickness of the shims by replacing different models of adjusting shims on the clamp. This solves the problem of having to repair or replace the clamp to adjust the workpiece runout value, greatly reducing the maintenance and replacement process of the device. It ensures stable and reliable welding quality while improving adjustment efficiency and saving debugging time and costs. The clamping curved surface adopts the trapezoidal column structure of this technical solution, which increases the friction between the workpiece and the clamp while reducing damage to the workpiece surface. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of the split-type shaft head clamping device for friction welding of this utility model;

[0009] Figure 2 yes Figure 1 Sectional view along line A;

[0010] Figure 3 yes Figure 1 Enlarged view of part B in the middle;

[0011] Figure 4 This is a perspective view of the clamp in this utility model.

[0012] Figure 5 This is a diagram showing the usage status of a split-type shaft head clamping device for friction welding.

[0013] In the diagram: 1. Clamping curved surface; 2. Fixing end of the clamp; 3. Adjusting end of the clamp; 4. Adjusting shim; 5. Bolt; 6. Connecting hole; 7. Chuck connecting positioning teeth; 8. Positioning block; 9. Positioning groove; 10. Chuck; 11. Shaft head workpiece; 12. Trapezoidal teeth; 13. Machine tool support frame; 14. Hollow tube workpiece; 15. Clamp; 16. Large outer diameter of the shaft head; 17. Bolt hole. Detailed Implementation

[0014] The technical solution of one embodiment of the present invention will be described in detail below with reference to the accompanying drawings, so as to provide a clearer and more complete explanation of the protection scope of the present invention. Obviously, the described embodiment is only one embodiment of the present invention, and not all of them.

[0015] Referring to the embodiment shown in the attached drawings, the present invention relates to a split-type shaft head clamping device for friction welding, comprising three identical clamps 15 for clamping shaft head workpieces 11. Each clamp 15 has two connecting holes 6, and each clamp 15 can be fixedly mounted on a chuck 10 by chuck bolts. The fixed contact surface between the clamp 15 and the chuck 10 has chuck connecting positioning teeth 7. The present invention is characterized in that each clamp 15 consists of a clamp fixing end 2 and a clamp adjusting end 3. An adjusting shim 4 is installed between the clamp fixing end 2 and the clamp adjusting end 3. The clamp fixing end 2, the adjusting shim 4, and the clamp adjusting end 3 are fixedly connected by bolts 5 through bolt holes 17, achieving a unified fastening. By replacing different types of adjusting shims 4, the thickness of the entire clamp can be adjusted, and the wear value can be compensated, thereby adjusting the workpiece runout value and achieving the purpose of this invention.

[0016] The clamping device 15 has a clamping fixed end 2 and a clamping adjusting end 3 with a positioning block 8 and a positioning groove 9 that fit together and press against each other. In this embodiment, the positioning block 8 is set on the clamping fixed end 2 and the positioning groove 9 is set on the clamping adjusting end 3. During installation, the positioning block 8 is embedded into the positioning groove 9 to achieve positioning of the clamping fixed end 2 and the clamping adjusting end 3, so that the position will not shift after being subjected to force.

[0017] The end face of the clamping adjustment end 3 is a clamping curved surface 1. The clamping curved surface is composed of several trapezoidal columns that are parallel to the axis of the large outer circle 16 of the shaft head and have trapezoidal teeth 12 in cross section. The tooth tip of the trapezoidal teeth 12 is a curved surface that matches the large outer circle 16 of the shaft head. This structure can minimize damage to the surface of the shaft head workpiece.

[0018] See usage status. Figure 5When the friction welding shaft head clamping device of this utility model experiences certain wear and cannot meet normal production requirements, remove the clamp 15 that needs adjustment, replace the adjusting shim 4 with one of suitable thickness, and then align and position the positioning block 8 and positioning groove 9 of the clamp fixing end 2 and the clamp adjusting end 3, and connect and fix them with bolts 5. The clamp 15 is now installed. Each clamp 15 is connected and fixed to the machine tool chuck 10 through the connecting hole 6 by chuck bolts. After installing the shaft head workpiece 11, use a dial indicator to measure the runout value of the workpiece after clamping. If the runout value is less than 0.3mm, no adjustment is needed. If it is greater than 0.3mm, the clamp needs to be disassembled again, and the adjusting shim 4 needs to be replaced with one of the appropriate models and the adjusted shim thickness. Select different standard models of shims (standard model 0.01-0.10mm) according to the actual wear or the need for supplementation to compensate for the wear value. Repeat the above installation steps until the runout value of the workpiece after clamping is qualified. The debugging and installation are then complete. The workpiece runout refers to the rotation of the actual outer diameter surface of the workpiece being measured around the reference axis without axial movement, while the indicator remains stationary, and the maximum difference in readings measured by the indicator throughout the entire process.

[0019] During processing, the workpiece 11 is manually placed at the shaft end, and the hollow tube 14 is placed in the tube clamp half. The machine tool is started, and the split-type shaft end clamping device for friction welding automatically clamps the workpiece. The tube clamp half also automatically clamps the hollow tube 14. The machine tool support frame 13 automatically pushes the hollow tube 14 towards the large end face of the shaft end. When the designated processing position is reached, the tube clamp half clamps, and the friction welding action begins until welding is completed. The workpiece is removed, the next workpiece is placed in, and the processing cycle is repeated.

[0020] The above description is only one embodiment of this utility model and does not limit the scope of patent protection of this utility model. Any equivalent structure or equivalent transformation made based on the content of this utility model specification and drawings, or directly or indirectly applied to other related technical fields, are similarly included within the scope of patent protection of this utility model.

Claims

1. A split-type shaft head clamping device for friction welding, comprising a clamp (15) fixedly connected to a chuck (10), characterized in that: The clamp has a clamp fixed end (2) and a clamp adjusting end (3). An adjusting shim (4) is provided between the clamp fixed end (2) and the clamp adjusting end (3). The clamp fixed end (2), the adjusting shim (4) and the clamp adjusting end (3) are fixedly connected by bolts (5).

2. The split-type shaft head clamping device for friction welding according to claim 1, characterized in that: The clamping device is fixed at end (2) and is provided with a positioning block (8), and the clamping device is adjusted at end (3) and is provided with a positioning groove (9) that matches and presses against the positioning block (8), or the clamping device is fixed at end (2) and is provided with a positioning groove (9), and the clamping device is adjusted at end (3) and is provided with a positioning block (8) that matches and presses against the positioning groove (9).

3. The split-type shaft clamping device for friction welding according to claim 1 or 2, characterized in that: The clamping adjustment end (3) of the clamping device is a clamping curved surface (1) composed of several trapezoidal columns that are parallel to the axial direction of the large outer circle of the shaft head and have a trapezoidal tooth (12) cross section. The tooth tip of the trapezoidal tooth (12) is a curved surface that matches the large outer circle of the shaft head.

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