CN108115262B - A connecting device for friction stir welding head - Google Patents

Abstract

The invention relates to the technical field of friction stir welding, in particular to a connecting device for a friction stir welding head, comprising a tool handle, the tool handle includes an upper connecting block, a positioning boss installed on the bottom of the upper connecting block, and a positioning boss installed at the bottom of the positioning boss. lower connection block. The friction stir welding head touches the surface of the magnetic plate inside the convex groove, and the magnetic plate uses its own magnetic force to adsorb and fix the friction stirring welding head, which is conducive to fixing the friction stirring welding head. The fixed limit is beneficial to fix the position of the friction stir welding head, effectively prevent the centrifugal force generated by rotation from affecting the friction stir welding head, and improve the service life of the friction stir welding head. The friction stir welding head can be used in the universal ball. Stirring off-center at the bonding position, fully stirring the material to be fused, so that the size of the grains formed by welding is more uniform, the grain structure is more reasonable, and the welded joints are firmer.

Description

A connecting device for friction stir welding head

technical field

The invention relates to the technical field of friction stir welding, in particular to a connecting device of a friction stir welding head.

Background technique

The friction stir welding process is that a cylindrical or other shaped friction stir welding head is inserted into the joint of the workpiece, and the high-speed rotation of the welding head makes it rub against the material of the welding workpiece, thereby increasing the temperature of the material at the joint. Softening, while friction stir the material to complete the welding. At present, the welding head of friction stir welding at home and abroad usually includes two parts: the friction stir welding head and the tool handle. The top of the tool handle body is provided with a connecting hole for fixing the welding head on the friction welding machine, and the bottom is provided with a connecting hole for mounting the welding head on the friction welding machine. Clamping hole for friction stir welding head. During the friction stir welding process, the heat generated by the friction stir welding head acts on the material to be welded on the one hand, and diffuses to the main shaft of the friction stir welding machine through the tool holder on the other hand.

However, in the existing connection device of the friction stir welding head, when the friction stir welding head is fixed inside the clamping hole, the friction stir welding head can only rotate along the central axis of the clamping hole, so that when the material to be fused enters the welding position Non-uniformity will affect the welding effect, and at the same time, a large centrifugal force will be generated on the friction stir welding head when it rotates, resulting in unstable fixation of the friction stir welding head and causing certain wear on the friction stir welding head. In view of this, we propose a connection device for friction stir welding head.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a connecting device for a friction stir welding head, so as to solve the problem that the friction stir welding head proposed in the above-mentioned background art can only rotate along the central axis of the clamping hole, so that the material to be fused does not enter the welding position. Evenly, it affects the effect of welding, and at the same time, a large centrifugal force will be generated on the friction stir welding head when it rotates, resulting in unstable fixation of the friction stir welding head and causing certain wear problems to the friction stir welding head.

To achieve the above object, the present invention provides the following technical solutions:

A connecting device for a friction stir welding head, comprising a tool handle, the tool handle includes an upper connecting block, a positioning boss installed at the bottom of the upper connecting block, and a lower connecting block installed at the bottom of the positioning boss, so the The upper connecting block is provided with a connecting hole inside, the lower connecting block includes a heat dissipation block, a friction stir welding head mounting block is installed at the bottom of the heat dissipation block, and a clamping hole is provided inside the friction stir welding head mounting block , the top of the clamping hole is provided with a convex groove, and a magnetic plate is installed inside the convex groove.

Preferably, the magnetic plate and the inner wall of the convex groove are welded seamlessly.

Preferably, a first installation groove is provided on the side of the clamping hole close to the convex groove, a fastening bolt is arranged inside the first installation groove, and a clamping ring is installed at one end of the fastening bolt, so A limiting block is installed on the inner wall of the clamping ring, and one end of the limiting block is provided with a clamping plate.

Preferably, the fastening bolt is screwed with the first installation groove.

Preferably, the cross section of the card board is triangular.

Preferably, the inner wall of the clamping hole is provided with a second installation groove, a spring is installed inside the second installation groove, and one end of the spring is provided with a universal ball.

Preferably, the universal ball is elastically connected to the inner wall of the second installation groove through the spring.

Preferably, a plurality of heat dissipation blades are installed inside the heat dissipation block, and the shape of the heat dissipation blades is a flat plate.

Compared with the prior art, the beneficial effects of the present invention:

1. The connection device of the friction stir welding head, the friction stirring welding head is pressed against the surface of the magnetic plate inside the convex groove, and the magnetic plate uses its own magnetic force to adsorb and fix the friction stirring welding head, which is conducive to the fixing of the friction stirring welding head. At the same time, the friction stir welding head is limited and fixed by the limit block, which is beneficial to the position fixing of the friction stir welding head, effectively preventing the centrifugal force generated by the rotation from affecting the friction stir welding head, and improving the service life of the friction stir welding head. .

2. The connection device of the friction stir welding head, the top of the friction stir welding head is fixed, and the friction stir welding head can be stirred off-center at the position where the universal ball is attached, and the materials to be fused are fully stirred to make the welding formed. The grain size is more uniform and the grain structure is more reasonable, and the welded joint is stronger.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is the structural schematic diagram of the friction stir welding head mounting block of the present invention;

Figure 3 is a schematic diagram of the structure of the clamping ring of the present invention.

In the figure: 1. Tool handle; 2. Upper connecting block; 21. Connecting hole; 3. Positioning boss; 4. Lower connecting block; 41. Heat sink; 42, Friction stir welding head mounting block; 43, Heat sink; 44, clamping hole; 45, convex groove; 46, magnetic plate; 47, first installation groove; 48, clamp ring; 481, limit block; 482, card plate; 49, fastening bolt; 410, second installation slot; 411, spring; 412, universal ball.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to Figures 1-3, the present invention provides a technical solution:

A connection device of a friction stir welding head, as shown in Figures 1 and 2, includes a handle 1, and the handle 1 includes an upper connecting block 2, a positioning boss 3 installed at the bottom of the upper connecting block 2, and a positioning boss installed on the positioning boss. The lower connection block 4 at the bottom of the table 3, the upper connection block 2 is provided with a connection hole 21 inside, the lower connection block 4 includes a heat dissipation block 41, and a friction stir welding head mounting block 42 is installed at the bottom of the heat dissipation block 41, and the friction stir welding head is installed The inside of the block 42 is provided with a clamping hole 44, the top of the clamping hole 44 is provided with a convex groove 45, and a magnetic plate 46 is installed inside the convex groove 45, and the magnetic plate 46 and the inner wall of the convex groove 45 are seamlessly welded. The shank 1 is connected to the friction welding machine through the connecting hole 21, and the tool shank 1 is fixed on the friction welding machine through the positioning boss 3, and the friction stir welding head is installed into the clamping hole 44, and the friction stir welding head is installed. Abutting on the surface of the magnetic plate 46 inside the convex groove 45, the magnetic plate 46 uses its own magnetic force to adsorb and fix the friction stir welding head, which is beneficial to fix the friction stir welding head.

As shown in FIG. 2 and FIG. 3 , the side of the clamping hole 44 close to the convex groove 45 is provided with a first installation groove 47 , a fastening bolt 49 is arranged inside the first installation groove 47 , and one end of the fastening bolt 49 is installed with a The clamping ring 48, the inner wall of the clamping ring 48 is installed with a limit block 481, one end of the limit block 481 is provided with a clamping plate 482, the fastening bolt 49 is threaded with the first installation groove 47, and the section of the clamping plate 482 is triangular. When the friction welding head enters the clamping hole 44 and is adsorbed and fixed with the magnetic plate 46, the friction stir welding head is clamped into the clamping ring 48. At this time, the tightening bolt 49 is twisted, and the clamping rings 48 on both sides are approached to the middle, so that The inside of the clamp ring 48 is tightly wrapped on the surface of the fastening bolt 49, at this time, the clamping plate 482 inside the clamping ring 48 contacts the surface of the fastening bolt 49, and the friction stir welding head is clamped by the inclined edge of the clamping plate 482. , The friction stir welding head is limited and fixed by the limit block 481, which is beneficial to the positional fixation of the friction stir welding head, effectively preventing the centrifugal force generated by the rotation from affecting the friction stir welding head, and improving the use of the friction stir welding head. life.

As shown in FIG. 2 , the inner wall of the clamping hole 44 is provided with a second installation groove 410 , a spring 411 is installed inside the second installation groove 410 , one end of the spring 411 is provided with a universal ball 412 , and the universal ball 412 passes through The spring 411 is elastically connected with the inner wall of the second installation groove 410. When the friction stir welding head enters the clamping hole 44, the friction stir welding head squeezes the universal ball 412 to make the spring 411 shrink toward the second installation groove 410. When the spring 411 exerts a reverse thrust on the universal ball 412, the universal ball 412 is tightly attached to the surface of the friction stir welding head. When rotating, the top of the friction stir welding head is fixed, and the friction stir welding head can be in The position where the universal ball 412 is attached is off-center and stirred, and the material to be fused is fully stirred, so that the grain size formed by welding is more uniform, the grain structure is more reasonable, and the welded joint is stronger.

As shown in FIG. 1 , a number of heat dissipation blades 43 are installed inside the heat dissipation block 41 , and the shape of the heat dissipation blades 43 is a straight plate. The heat dissipation blades 43 can generate airflow for heat dissipation, which increases the heat dissipation speed of the tool holder 1, and can effectively prevent the main shaft of the friction stir welding machine from being damaged due to heat accumulation.

The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions are only preferred examples of the present invention, and are not intended to limit the present invention, without departing from the spirit and scope of the present invention. Under the premise, the present invention will also have various changes and improvements, and these changes and improvements all fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (5)

1. A connecting device for a friction stir welding head, comprising a handle (1), characterized in that: the handle (1) comprises an upper connecting block (2), a A positioning boss (3) and a lower connecting block (4) mounted on the bottom of the positioning boss (3), a connecting hole (21) is provided inside the upper connecting block (2), and the lower connecting block ( 4) comprising a heat dissipation block (41), a friction stir welding head mounting block (42) is installed at the bottom of the heat dissipation block (41), and a clamping hole (44) is provided inside the friction stir welding head mounting block (42) ), the top of the clamping hole (44) is provided with a convex groove (45), and a magnetic plate (46) is installed inside the convex groove (45); the clamping hole (44) is close to the convex groove One side of (45) is provided with a first installation groove (47), a fastening bolt (49) is arranged inside the first installation groove (47), and a clamping ring is installed at one end of the fastening bolt (49). (48), a limiting block (481) is installed on the inner wall of the clamping ring (48), one end of the limiting block (481) is provided with a clamping plate (482), and the cross-section of the clamping plate (482) is triangular ; The inner wall of the clamping hole (44) is provided with a second installation groove (410), a spring (411) is installed inside the second installation groove (410), and one end of the spring (411) is provided with a ten thousand To the rolling ball (412). 2 . The connecting device of the friction stir welding head according to claim 1 , wherein the magnetic plate ( 46 ) and the inner wall of the convex groove ( 45 ) are welded seamlessly. 3 . 3 . The connecting device for friction stir welding heads according to claim 1 , wherein the fastening bolts ( 49 ) are in threaded engagement with the first installation grooves ( 47 ). 4 . 4. The connection device of the friction stir welding head according to claim 1, wherein the universal ball (412) is elastically connected to the inner wall of the second installation groove (410) through the spring (411) . 5. The connection device of the friction stir welding head according to claim 1, wherein a plurality of heat dissipation blades (43) are installed inside the heat dissipation block (41), and the heat dissipation blades (43) are in the shape of Flat plate.

Images