Four-milling cutter fixed type welding and milling integrated friction welding head

Abstract

A four-milling-cut fixed integrated friction stir welding head includes a clamping shank and a shoulder at its end. The shoulder has a conical stirring pin at its top center, and two sets of material collection ports, a forward milling cutter, and a reverse milling cutter arranged sequentially around its circumference. The forward and reverse milling cutters are connected by an arc-shaped reinforcing rib. This device enables simultaneous welding and milling during the friction stir welding process, efficiently removing burrs and flash generated during welding, ensuring stable welding and good weld bead formation.

Description

Technical Field

[0001] This utility model relates to a technology in the field of friction welding, specifically a four-milling cutter fixed type integrated stirring head for friction welding. Background Technology

[0002] Friction stir welding typically requires a certain amount of pressure, which makes it very easy for weld burrs and flash to appear on both sides of the weld bead. Therefore, manual grinding or milling is required to remove them. This not only increases time and process costs and affects welding efficiency, but also makes it difficult to guarantee the quality of the weld after removal. Utility Model Content

[0003] This invention addresses the shortcomings of existing technologies that cannot simultaneously achieve milling and uniform grinding by proposing a four-milling-cutter fixed integrated friction stir welding head. This head enables simultaneous welding and milling during the friction stir welding process, efficiently removing burrs and flash generated during welding, and ensuring stable welding and good weld bead formation.

[0004] This utility model is achieved through the following technical solution:

[0005] This utility model relates to a four-milling-cutter fixed type integrated friction stir welding head, including: a clamping handle and a shoulder set at its end, wherein: a conical stirring pin is provided at the center of the top of the shoulder, and two sets of material collection ports, a forward milling cutter and a reverse milling cutter are arranged in sequence around the shoulder, and the forward milling cutter and the reverse milling cutter are connected by an arc-shaped reinforcing rib.

[0006] Technical effect

[0007] 1. This utility model has an integrated welding and milling mixing head that simultaneously performs welding, milling and grinding, efficiently milling away the flash and burrs produced by welding, ensuring good weld formation and surface performance;

[0008] 2. This utility model is a four-milling-integrated stirring head with fixed milling cutters. The four milling cutters, including the forward milling cutter and the reverse milling cutter, are arranged in a circumferential array to ensure uniform stress during welding and extrusion of the stirring head. While two milling cutters are milling, the other two milling cutters are ground to sharpen their cutting edges, which can realize clockwise or counterclockwise welding of friction stir welding, thereby improving milling efficiency, milling cutter service life and welding applicability.

[0009] 3. When welding workpieces by friction stir welding, the depth of the shoulder penetrating the workpiece is greater than 0.3mm, which ensures that the milling cutter edge can press against the workpiece surface and improves the stability of the welding process. Attached Figure Description

[0010] Figure 1 and Figure 2 This is a schematic diagram of the structure of this utility model;

[0011] Figure 3 for Figure 2 Enlarged view of part A;

[0012] Figure 4 for Figure 1 A front view structural diagram and an enlarged view of part B;

[0013] Figure 5 for Figure 1 A schematic diagram of the right-side structure and an enlarged view of section C;

[0014] Figure 6 for Figure 1 A schematic diagram of the structure viewed from below.

[0015] In the figure: 1 stirring pin, 2 shoulder, 3 collection port, 4 clamping handle, 5 rectangular block structure, 6 reinforcing rib, 7 forward milling cutter, 71 forward milling surface, 72 forward grinding surface, 8 reverse milling cutter, 81 reverse milling surface, 82 reverse grinding surface. Detailed Implementation

[0016] like Figure 1 As shown in the figure, this embodiment relates to a four-milling cutter fixed type integrated welding and milling friction welding stirring head, including: a clamping handle 4 and a shoulder 2 disposed at its end, wherein: a conical stirring needle 1 is provided at the center of the top of the shoulder 2, and two sets of material collection ports 3, a forward milling cutter 7 and a reverse milling cutter 8 are arranged in sequence around the shoulder 2, and the forward milling cutter 7 and the reverse milling cutter 8 are connected by an arc-shaped reinforcing rib 6.

[0017] The stirring needle 1, shoulder 2, collection port 3, clamping handle 4, rectangular block structure 5, reinforcing rib 6, forward milling cutter 7, and reverse milling cutter 8 are an integral structure.

[0018] like Figure 3 As shown, the collection port 3 is used to collect and remove the flash and burrs milled by the forward milling cutter 7 and the reverse milling cutter 8. Specifically, it consists of two annular grooves symmetrically distributed on the shoulder 2. The annular grooves transition to the end of the clamping handle 4 with a conical surface, which facilitates the smooth flow and discharge of the milled metal flash waste along the grooves.

[0019] like Figure 3 and Figure 4 As shown, the forward milling cutter 7 is specifically a pair of trapezoidal annular bosses symmetrically distributed on the shoulder 2 and connected to the material collection port 3. The side of the trapezoidal annular boss with a clockwise tangent angle of less than 90° is the forward milling surface 71, which facilitates clockwise milling of metal flash, and the side with a counterclockwise tangent angle of greater than 90° is the forward grinding surface 72, which facilitates counterclockwise grinding of metal flash and grinding of the cutting edge surface of the forward milling cutter 7.

[0020] like Figure 3 and Figure 5As shown, the reverse milling cutter 8 is specifically a pair of trapezoidal annular bosses symmetrically distributed on the shoulder 2 and connected to the material collection port 3. The side of the trapezoidal annular boss with a counterclockwise tangent angle of less than 90° is the reverse milling surface 81, which facilitates counterclockwise milling of metal flash, and the side with a clockwise tangent angle of greater than 90° is the reverse grinding surface 82, which facilitates clockwise grinding of metal flash and grinding of the cutting edge surface of the reverse milling cutter 8.

[0021] like Figure 3 As shown, the reinforcing rib 6 is specifically an annular boss connecting the root of the forward grinding surface 72 of the forward milling cutter 7 and the root of the reverse grinding surface 82 of the reverse milling cutter 8, which is used to improve the load-bearing capacity of the forward milling cutter 7 and the reverse milling cutter 8 during operation and strengthen the load-bearing capacity of the milling cutter.

[0022] To accommodate the process pressure during welding of the stirring pin, the distance between the cutting edge of the forward milling cutter 7 and the front end face of the shoulder of the reverse milling cutter 8 is maintained at 0.3 mm.

[0023] The clamping handle 4 has a rectangular block structure 5 at one end relative to the shoulder 2. To ensure that the stirring head is fixed on the friction stir welding equipment without shaking, the rectangular block structure 5 is a milled plane on the rear circumference of the clamping handle 4, and the milled plane matches the friction stir welding equipment.

[0024] This device operates as follows: Based on the welding process, the depth 'a' of the shoulder 2 penetrating the workpiece is determined to be greater than 0.3 mm to improve the stability of the friction stir welding process, ensuring that the cutting edges of the forward end mill 7 and the reverse end mill 8 can press against the workpiece surface. Then, the integrated stirring head is mounted on the friction stir welding equipment for welding. When the stirring head rotates clockwise, the forward end mill 7 is used to mill away the burrs and flash generated by friction stir welding, while the reverse end mill 8 is ground and its cutting edge is polished to grind the weld surface. When the stirring head rotates counterclockwise, the reverse end mill 8 is used to mill away the burrs and flash generated by friction stir welding, while the forward end mill 7 is ground and its cutting edge is polished to grind the weld surface.

[0025] Compared with existing technologies, this device can perform welding and milling simultaneously, efficiently milling away burrs and flash generated during welding. At the same time, it improves milling efficiency, milling cutter life and welding applicability, and ensures good stability and weld bead formation during the welding process.

[0026] The above-described specific implementations can be partially adjusted by those skilled in the art in different ways without departing from the principles and purpose of this utility model. The scope of protection of this utility model is determined by the claims and is not limited to the above-described specific implementations. All implementation schemes within its scope are bound by this utility model.

Claims

1. A four-milling-cutter fixed type integrated friction stir welding head, characterized in that, include: The clamping handle and the shoulder at its end are provided, wherein: a conical stirring needle is provided at the center of the top of the shoulder, and two sets of material collection ports, a forward milling cutter and a reverse milling cutter are provided in sequence around the circumference of the shoulder, and the forward milling cutter and the reverse milling cutter are connected by an arc-shaped reinforcing rib.

2. The four-milling-cutter fixed type integrated friction stir welding head according to claim 1, characterized in that, The collection port consists of two annular grooves symmetrically distributed on the shoulder of the shaft, and the annular grooves transition to the end of the clamping handle with a conical surface.

3. The four-milling-cutter fixed type integrated friction stir welding head according to claim 1, characterized in that, The forward milling cutter consists of a pair of trapezoidal annular bosses symmetrically distributed on the shoulder and connected to the material collection port. The side of the trapezoidal annular boss with a clockwise tangent angle of less than 90° is the forward milling surface, and the side with a counterclockwise tangent angle of greater than 90° is the forward grinding surface.

4. The four-milling-cutter fixed type integrated welding and milling friction welding stirring head according to claim 1, characterized in that, The reverse milling cutter is a pair of trapezoidal annular bosses symmetrically distributed on the shoulder and connected to the material collection port. The side of the trapezoidal annular boss with a counterclockwise tangent angle of less than 90° is the reverse milling surface, and the side with a clockwise tangent angle of greater than 90° is the reverse grinding surface.

5. The four-milling-cutter fixed type integrated friction stir welding head according to claim 1, characterized in that, The reinforcing rib is an annular boss that connects the root of the forward grinding surface of the forward milling cutter and the root of the reverse grinding surface of the reverse milling cutter.

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