阅读说明：本技术 一种搅拌摩擦焊搭接刀具 (Friction stir welding lap joint cutter ) 是由 迟珉良 梁军强 于 2020-07-23 设计创作，主要内容包括：本发明属于搅拌摩擦焊技术领域,提供了一种搅拌摩擦焊搭接刀具,用于搭接上板材和下板材,包括刀体、夹持柄以及工作部；夹持柄与刀体一体组成,夹持柄连接在刀体的一端并用于与焊接设备刀柄固定连接；工作部一体连接在夹持刀体的另一端,工作部包括大搅拌针和小搅拌针,大搅拌针和小搅拌针同时破碎坡口面金属板材并提高下板材的塑型金属流动性后实现搭接。本发明的优点在于通过大小两个搅拌针同时破碎坡口面母材金属,在大小两个轴肩同时旋转作用下,分别带动上下两块母材的塑性金属流动,与常规搅拌摩擦焊接刀具相比,利用小轴肩可大大提高下板材的塑型金属流动性,改善焊缝内部压强分布,进而消除冷搭接缺陷及HOOK缺陷。(The invention belongs to the technical field of friction stir welding, and provides a friction stir welding lap joint cutter which is used for lapping an upper plate and a lower plate and comprises a cutter body, a clamping handle and a working part; the clamping handle is connected to one end of the cutter body and is fixedly connected with a cutter handle of the welding equipment; the working part is connected to the other end of the clamping cutter body in an integrated mode, the working part comprises a large stirring pin and a small stirring pin, the large stirring pin and the small stirring pin simultaneously break a bevel face metal plate and improve the plastic metal fluidity of the lower plate to achieve lap joint. The invention has the advantages that the large and small stirring needles simultaneously crush the base metal of the bevel surface and respectively drive the plastic metals of the upper and lower base metals to flow under the simultaneous rotation action of the large and small shaft shoulders.)

1. The utility model provides a friction stir welding overlap joint cutter for panel and lower panel in the overlap joint, its characterized in that includes:

a cutter body;

the clamping handle is connected to one end of the cutter body and is fixedly connected with a cutter handle of the welding equipment;

the working part is connected to the other end of the clamping cutter body in an integrated mode, wherein the working part comprises a large stirring pin and a small stirring pin, and the large stirring pin and the small stirring pin simultaneously break a bevel face metal plate and improve the flowability of the molding metal of the lower plate to achieve lap joint.

2. The friction stir welding lap joint tool of claim 1, wherein the joint of the small stirring pin and the large stirring pin has a small shoulder, and the joint of the large stirring pin and the tool body has a large shoulder, wherein the large shoulder and the small shoulder rotate simultaneously and drive the plastic metal of the upper metal plate and the lower metal plate to flow.

3. The friction stir welding lap tool according to claim 1 or 2, wherein the tool body comprises a transition portion and a heat dissipation portion which are integrally connected, the transition portion is in a shape of a large upper end and a small lower end, and the heat dissipation portion is provided with a heat dissipation ring.

4. The overlap tool according to claim 1 or 2, wherein the small stirring pin is a cylindrical pin having a small lower end and a large upper end.

5. The tool of claim 1 or 2, wherein the large pins are a plurality of raised circular rings disposed on the surface.

6. The tool of claim 5, wherein the transition junction between two adjacent circular convex rings is a circular groove.

7. A friction stir welding lap tool according to claim 3, wherein the bottom surface of the transition portion has a face-engaging annular ring thereon.

Technical Field

The invention belongs to the technical field of friction stir welding, and relates to a friction stir welding lap joint cutter.

Background

In the friction stir welding process of the aluminum alloy lap joint, because the metal flow of the welding seam is insufficient, and the heat transfer between the upper plate and the lower plate is poor, the existing friction stir welding lap joint cutter is easy to form a HOOK defect and a cold lap joint defect during processing, so that the existing friction stir welding lap joint cutter needs to be improved.

Disclosure of Invention

The invention aims to solve the technical problem of the prior art and provides a friction stir welding lapping tool which can improve the plastic metal fluidity of a lower plate and eliminate the HOOK defect and the cold lapping defect.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a friction stir welding overlap joint cutter for panel and lower panel in the overlap joint, its characterized in that includes:

a cutter body;

the clamping handle is connected to one end of the cutter body and is fixedly connected with a cutter handle of the welding equipment;

the working part is connected to the other end of the clamping cutter body in an integrated mode, wherein the working part comprises a large stirring pin and a small stirring pin, and the large stirring pin and the small stirring pin simultaneously break a bevel face metal plate and improve the flowability of the molding metal of the lower plate to achieve lap joint.

In the friction stir welding overlap joint cutter, the joint of the small stirring pin and the large stirring pin is provided with the small shaft shoulder, the joint of the large stirring pin and the cutter body is provided with the large shaft shoulder, and the large shaft shoulder and the small shaft shoulder rotate simultaneously and drive plastic metal of the upper metal plate and the lower metal plate to flow.

When friction stir welding is carried out for lapping, the small shaft shoulder is positioned at the lower plate for stirring, the large shaft shoulder is positioned at the upper plate for stirring, the large stirring pin and the small stirring pin simultaneously crush the bevel face metal plate, the large shaft shoulder and the small shaft shoulder simultaneously rotate and respectively drive plastic metal of the upper metal plate and the lower metal plate to flow and then realize lapping, and the small shaft shoulder can greatly improve the plastic metal fluidity of the lower plate, so that the internal pressure distribution of a welding seam is improved, and further, the cold lapping defect and the HOOK defect are eliminated.

In the above-mentioned friction stir welding overlap joint cutter, the cutter body includes transition portion and heat dissipation portion that integrative the connection, transition portion is big end tip form down for the upper end, wherein, has the heat dissipation ring on the heat dissipation portion.

In the above-mentioned friction stir welding bridging tool, the small stirring pin is a columnar pin having a small lower end and a large upper end.

In the friction stir welding overlap tool, the large stirring pins are a plurality of convex rings arranged on the surface.

In the above mentioned overlap joint tool for friction stir welding, the transition joint of two adjacent circular convex rings is a circular groove.

In one friction stir welding overlap tool described above, the bottom surface of the transition portion has a surface-engaging ring.

Compared with the prior art, the invention has the advantages that the base metal of the bevel face is simultaneously crushed by the large stirring pin and the small stirring pin, the plastic metals of the upper base metal and the lower base metal are respectively driven to flow under the simultaneous rotation action of the large shaft shoulder and the small shaft shoulder, and compared with the conventional friction stir welding tool, the small shaft shoulder can greatly improve the plastic metal fluidity of the lower plate, improve the internal pressure distribution of a welding line and further eliminate the cold lap joint defect and the HOOK defect.

Drawings

FIG. 1 is a schematic view of the three-dimensional structure of the friction stir welding lapping tool;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is a schematic elevation view of the structure of FIG. 1;

FIG. 4 is a schematic sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic view showing the state of the friction stir welding overlapping tool when overlapping plate materials.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

In the figures, a cutter body 100; a transition portion 1001; a heat dissipating portion 1002; a heat dissipating ring 1003; a mating ring 1004; a grip handle 200; a positioning groove 2001; a working section 300; a large pin 3001; a small pin 3002; a large shoulder 3003; a small shoulder 3004; a circular convex ring 3005; a circular groove 3006; an upper plate 400; the lower plate 500.

As shown in fig. 1 and 5, the friction stir welding overlap joint tool is used for overlapping an upper plate 400 and a lower plate 500, the whole tool is integrally processed, and mainly comprises a tool body 100, a clamping handle 200 and a working part 300, the whole tool is suitable for welding an overlap joint FSW of an aluminum alloy section, and the related fields are welding of lightweight structural members such as aerospace thin-wall structural members, automobile battery trays and water-cooling plates and part structures of rail train bodies.

The clamping handle 200 is formed integrally with the cutter body 100, wherein the clamping handle 200 is connected at one end of the cutter body 100 and is used for being connected with a welding equipment cutter handle, and a positioning groove 2001 is set on the clamping handle 200, convenient and firm fixed connection with a manipulator is realized, and the whole cutter is driven by the manipulator to perform processing operation, as an optimization, the cutter body 100 comprises a transition part 1001 and a heat dissipation part 1002 which are integrally connected, the transition part 1001 is in the shape of a big upper end and a small lower end, wherein the heat dissipation part 1002 is provided with a heat dissipation ring 1003, the transition part mainly plays a role in connecting the working part 1001 and transferring heat, heat can be generated when the working part 300 is subjected to friction stir welding, the heat can be dissipated out through the heat dissipation ring 1003, so that the heat is prevented from being overheated, the lapped effect is influenced, and the heat dissipation ring 1003 can facilitate clamping of.

As shown in fig. 2, 3 and 4, as a further optimization, the working part 300 in this embodiment is integrally connected to the other end of the clamping cutter body 100, wherein the working part 300 includes a large pin 3001 and a small pin 3002, wherein the small pin 3002 is located at the front end, the large pin 3001 is located at the rear end, the small pin 3002 has a small shoulder 3004 at the connection with the large pin 3001, and the large pin 3001 has a large shoulder 3003 at the connection with the transition portion of the cutter body 100, as shown in fig. 5, when friction stir welding is performed to lap-joint, the small shoulder 3004 is located at the lower plate 500 to perform stirring, and the large shoulder 3003 is located at the upper plate 400 to perform stirring, and the large pin 3001 and the small pin 3002 simultaneously crush the bevel face metal plate, wherein the large shoulder 3003 and the small shoulder 3004 simultaneously rotate and respectively drive the plastic metal of the upper metal plate 400 and the lower metal plate 500 to perform lap-joint after flowing, because the small shoulder 3004 can greatly improve the molding metal fluidity of the lower plate 500, the internal pressure distribution of the weld joint is improved, the cold lap joint defect and the HOOK defect are eliminated, and as optimization, the bottom surface of the transition part 1001 is provided with the surface matching ring 1004, and the matching ring 1004 can be fully contacted with the bottom surface of the upper plate 400, so that the molding metal fluidity of the upper plate 400 is further ensured.

In order to facilitate the whole cutter to penetrate through a plate, as further optimization, the small stirring pins 3002 are cylindrical pins with small lower ends and large upper ends, the large stirring pins 3001 are a plurality of circular convex rings 3005 arranged on the surface, the transitional connection part of every two adjacent circular convex rings 3005 is a circular groove 3006, the whole circular convex ring 3005 is a knife edge, the small stirring pins 3002 can firstly and smoothly penetrate through the plate, and then the circular convex rings 3005 of the rear large stirring pins 3001 are used for stirring to generate heat, so that the cold lap joint defect and the HOOK defect are eliminated.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the described embodiments may be made by those skilled in the art without departing from the scope and spirit of the invention as defined by the accompanying claims.