Friction stir welding stirring head

Abstract

The utility model discloses a stirring head for friction stir welding. Comprising a clamping mechanism fixedly arranged on a knife handle in the friction stir welding machine, a transition connecting mechanism detachably connected to the bottom of the clamping mechanism, a shaft shoulder mechanism detachably connected to the bottom of the transition connecting mechanism and capable of removing welding flashes, and a stirring needle mechanism fixedly arranged at the bottom of the shaft shoulder mechanism. The shaft shoulder mechanism and the stirring needle mechanism can be detached and replaced, and compared with the mode that a friction stir welding stirring head is integrally replaced, the use cost can be effectively reduced. In addition, the shaft shoulder mechanism can be used for milling welding flashes during welding operation, the welding flashes can be removed when the welding operation is completed, a milling device does not need to be independently used for removing the welding flashes, the labor intensity of workers can be effectively reduced, and the working efficiency of the welding operation can be effectively improved. The friction stir welding device is suitable for being installed on the friction stir welding machine to be used when workpieces are welded.

Description

TECHNICAL FIELD

[0001] The utility model relates to a stirring head, in particular to a friction stir welding stirring head. BACKGROUND

[0002] Friction stir welding is a solid phase connection technology, and its working principle is that a high-speed rotating stirring head is pressed into the joint of a workpiece to be welded, heat is generated between the stirring head and the workpiece to make the welded material locally plasticized, and the plasticized material flows from the front to the rear under the action of the rotation and friction force of the stirring head and solidifies behind the stirring head to form a weld as the stirring head moves along the welding direction.

[0003] The core of the friction stir welding technology is the friction stir welding stirring head, and the friction stir welding does not require other welding consumables such as an electrode, a welding wire, a flux, and a shielding gas during the welding process. The only consumable is the friction stir welding stirring head. In actual use, the shaft shoulder and the stirring needle in the friction stir welding stirring head are quickly consumed. Since the existing friction stir welding stirring head is an integrated structure, the shaft shoulder and the stirring needle cannot be disassembled and replaced at present, and only the friction stir welding stirring head can be replaced as a whole, so the use cost is high. In addition, the existing friction stir welding stirring head forms welding flash on both sides of the weld during welding. In order to ensure the flatness of the surface of the welded workpiece and the beauty of the shape, a milling device is usually used to remove the welding flash after welding, which increases the labor intensity of workers and affects the work efficiency of the welding operation. SUMMARY

[0004] In order to solve the above problems in the prior art, the utility model aims to provide a friction stir welding stirring head to reduce the use cost, reduce the labor intensity, and improve the work efficiency.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a friction stir welding stirring head, comprising a clamping mechanism for being fixed on a tool holder of a friction stir welding machine, a transition connecting mechanism detachably connected to the bottom of the clamping mechanism, a shaft shoulder mechanism capable of removing welding flash and detachably connected to the bottom of the transition connecting mechanism, and a stirring needle mechanism fixedly arranged at the bottom of the shaft shoulder mechanism.

[0006] As the limitation of the utility model, the shaft shoulder mechanism includes a shaft shoulder body which is detachably connected to the bottom of the transition connecting mechanism through the mounting member; the bottom end of the shaft shoulder body is a circular annular slope, the height of the outer periphery profile line of the circular annular slope is greater than the height of the inner periphery profile line of the circular annular slope, an outer annular groove is arranged at the position of the bottom surface of the shaft shoulder body which is connected to the inner periphery profile line of the circular annular slope, at least one inner annular groove is arranged at the position of the bottom surface of the shaft shoulder body between the outer annular groove and the stirring needle mechanism, a plurality of welding flash guide grooves are arranged on the circumference of the sidewall of the shaft shoulder body, the bottom of each welding flash guide groove penetrates the circular annular slope, and the bottom of each welding flash guide groove is in communication with the outer annular groove.

[0007] As the further limitation of the utility model, the mounting member includes a mounting rod which is inserted into the transition connecting mechanism and is fixed to the top of the shaft shoulder body, and two fastening bolts which are oppositely screwed to the sidewall of the transition connecting mechanism, the ends of the two fastening bolts are respectively pressed on the mounting rod to fix the mounting rod.

[0008] As the further limitation of the utility model, the stirring needle mechanism includes a conical member with a plurality of side planes on the outer sidewall, and a spiral groove is arranged on the sidewall of the conical member.

[0009] As the further limitation of the utility model, the clamping mechanism includes a clamping handle, and two clamping planes are milled at the opposite positions of the outer wall of the clamping handle.

[0010] As another limitation of the utility model, the transition connecting mechanism includes a cylindrical member which is fixed to the bottom of the clamping mechanism, and a circular truncated cone member which is fixed to the bottom of the cylindrical member.

[0011] As the further limitation of the utility model, a liquid injection pipe is arranged in communication on the cylindrical member, a first cooling liquid channel in the shape of a cylindrical spiral line is arranged in the cylindrical member, and a second cooling liquid channel in the shape of a conical spiral line is arranged in the circular truncated cone member; a sealing cover is detachably connected to the liquid injection pipe, the liquid injection pipe is arranged in communication with the first cooling liquid channel, and the first cooling liquid channel and the second cooling liquid channel are arranged in communication.

[0012] As the third limitation of the utility model, the outer parts of the clamping mechanism, the transition connecting mechanism, the shaft shoulder mechanism and the stirring needle mechanism are coated with a heat insulation coating, and the heat insulation coating is made of composite magnesium aluminum silicate.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] (1) The shoulder mechanism and the transition connecting mechanism are detachably connected, the stirring needle mechanism is fixed on the shoulder mechanism, the shoulder mechanism and the stirring needle mechanism can be disassembled and replaced according to needs, the use cost can be effectively reduced, the clamping mechanism and the transition connecting mechanism are detachably connected, when the clamping mechanism or the transition connecting mechanism is damaged, the clamping mechanism or the transition connecting mechanism can be replaced alone, compared with the whole replacement of the friction stir welding stirring head, the use cost can be further effectively reduced. In addition, the shoulder mechanism can be used for milling and cutting the welding flash during the welding operation, and the removal of the welding flash is completed when the welding operation is completed, so the milling device is not needed for removing the welding flash, the labor intensity of workers can be effectively reduced, and the working efficiency of the welding operation is improved.

[0015] (2) The inner annular groove and the outer annular groove on the shoulder body can control the flowing direction and speed of the metal in the welding process, and the welding quality can be improved. During the welding operation, the friction stir welding stirring head rotates at a high speed and moves along the welding direction, at this time, the circular ring inclined surface on the shoulder body can mill and cut the welding flash generated during the welding, and the circular ring inclined surface and the welding flash guide-out groove cooperate with each other, the milled and cut welding flash is guided out to the outside through the welding flash guide-out groove, the milled and cut welding flash can be prevented from adhering to the welding position, and the milling effect of the utility model can be effectively improved.

[0016] (3) The installation member has simple structure and low manufacturing cost, and the shoulder mechanism can be stably and detachably connected to the transition connecting mechanism through a simple and reasonable structure. Specifically, the installation rod is first inserted and fixed on the transition connecting mechanism, and then the installation rod is further fixed on the transition connecting mechanism by using two fastening bolts, so that the shoulder mechanism can be stably fixed on the transition connecting mechanism through the double fixing mode.

[0017] (4) The side plane and the spiral groove in the stirring needle mechanism can increase the plastic flow of the material, improve the uniformity of the welding seam organization, and effectively improve the welding effect.

[0018] (5) The clamping plane in the clamping mechanism can facilitate the taking during use, and can also ensure that the clamping mechanism can be more stably fixed on the tool holder in the friction stir welding machine, thereby effectively improving the stability of the structure of the utility model.

[0019] (6) The first cooling liquid channel and the second cooling liquid channel are arranged on the transition connecting mechanism, cooling liquid is injected into the first cooling liquid channel and the second cooling liquid channel during use, heat transfer upward can be reduced, the heat reflected by the workpiece can be effectively reduced by the heat insulation coating to be transmitted to the utility model, and the high temperature resistance of the utility model is improved.

[0020] In summary, the utility model discloses simple structure, convenient to use and practicality is strong, the utility model discloses can replace the shaft shoulder mechanism and the stirring needle mechanism and disassemble, compared to the whole replacement mode of the friction stir welding stirring head, can effectively reduce the use cost. And the utility model can utilize the shaft shoulder mechanism milling cutting welding flash when carrying out the welding operation, also completes the removal of welding flash when the welding operation is completed, need not separately utilize the milling device to remove the welding flash, can effectively reduce the labor intensity of worker and improve the work efficiency of welding operation. The utility model is suitable for installing on the friction stir welding machine and using when welding workpiece. BRIEF DESCRIPTION OF DRAWINGS

[0021] The utility model will be described in further detail below in combination with the drawings and specific embodiments.

[0022] Figure 1 It is the perspective view of the embodiment of the utility model;

[0023] Figure 2 It is the perspective view of another angle of the embodiment of the utility model;

[0024] Figure 3 It is Figure 2 It is the enlarged schematic view of A part in the middle;

[0025] Figure 4 It is the connection relation between the shaft shoulder mechanism, the mounting rod, the transition connecting mechanism and the fastening bolt in the embodiment of the utility model;

[0026] In the drawing: 1, round rod; 2, disc; 3, clamping plane; 4, bolt; 5, cylindrical member; 6, circular truncated cone member; 7, sealing cover; 8, rectangular slot; 9, fastening bolt; 10, shaft shoulder body; 11, welding flash guide-out slot; 12, circular ring inclined surface; 13, conical member; 14, side plane; 15, helical groove; 16, outer annular groove; 17, inner annular groove; 18, mounting rod; 19, liquid injection pipe. DETAILED DESCRIPTION

[0027] The preferred embodiments of the utility model will be described below in combination with the drawings. It should be understood that the preferred embodiments described here are only for illustrating and understanding the utility model, and are not used to limit the utility model.

[0028] Embodiment A friction stir welding stirring head

[0029] As Figure 1 , Figure 2As shown, the embodiment includes a clamping mechanism for being fixed on a tool holder of a friction stir welding machine, a transition connecting mechanism detachably connected at the bottom of the clamping mechanism, a shaft shoulder mechanism capable of removing welding flash detachably connected at the bottom of the transition connecting mechanism, and a stirring pin mechanism fixed at the bottom of the shaft shoulder mechanism, wherein the outer part of the clamping mechanism, the transition connecting mechanism, the shaft shoulder mechanism and the stirring pin mechanism are all coated with a heat insulation coating made of composite magnesium aluminum silicate.

[0030] The clamping mechanism includes a clamping handle, and two clamping planes 3 are milled at opposite positions of the outer wall of the clamping handle. Specifically, in the embodiment, the clamping handle includes a round rod 1 and a disc 2 fixed at the bottom of the round rod 1.

[0031] The transition connecting mechanism includes a cylindrical member 5 fixed at the bottom of the clamping mechanism and a circular truncated cone member 6 fixed at the bottom of the cylindrical member 5, two rectangular grooves 8 are formed at opposite positions of the outer wall of the cylindrical member 5, the cross section of the disc 2 in the clamping handle has the same size as the cross section of the cylindrical member 5, the bottom of the disc 2 in the clamping handle is aligned with the top of the cylindrical member 5 and is fixedly connected together by a plurality of equally spaced bolts 4. The top of the cylindrical member 5 is provided with a liquid injection pipe 19 in communication, the liquid injection pipe 19 extends to the outside of the disc 2, a cylindrical helical first cooling liquid channel is arranged in the cylindrical member 5, a circular conical helical second cooling liquid channel is arranged in the circular truncated cone member 6, a sealing cover 7 is detachably connected on the liquid injection pipe 19, the liquid injection pipe 19 is in communication with the first cooling liquid channel, and the first cooling liquid channel and the second cooling liquid channel are in communication. Specifically, the outside of the liquid injection pipe 19 is provided with external threads, the inside of the sealing cover 7 is provided with internal threads matched with the external threads of the liquid injection pipe 19, and the sealing cover 7 is threadedly connected on the liquid injection pipe 19.

[0032] The shaft shoulder mechanism includes a shaft shoulder body 10 detachably connected at the bottom of the transition connecting mechanism through a mounting member. Figure 3 As shown, the bottom end of the shaft shoulder body 10 is a circular ring inclined surface 12, the height of the outer periphery profile line of the circular ring inclined surface 12 is greater than the height of the inner periphery profile line of the circular ring inclined surface 12, an outer annular groove 16 is arranged at the position on the bottom surface of the shaft shoulder body 10 where the inner periphery profile line of the circular ring inclined surface 12 is connected, at least one inner annular groove 17 is arranged at the position on the bottom surface of the shaft shoulder body 10 between the outer annular groove 16 and the stirring pin mechanism, a plurality of welding flash guide grooves 11 are arranged at intervals on the circumference of the side wall of the shaft shoulder body 10, the bottom of each welding flash guide groove 11 penetrates the circular ring inclined surface 12 and each welding flash guide groove 11 is in communication with the outer annular groove 16, and the welding flash guide groove 11 is a semi-elliptical groove. Figure 4As shown, the mounting member includes a mounting rod 18 fixed on the top of the shaft shoulder body 10 and inserted into the transition connecting mechanism, and two fastening bolts 9 threadedly connected to the side wall of the transition connecting mechanism at the positions of the two rectangular grooves 8, the mounting rod 18 is a rectangular rod, and the ends of the two fastening bolts 9 abut against the mounting rod 18 to fix the mounting rod 18, and it is to be noted that the transition connecting mechanism has an insertion groove for inserting the rectangular rod, the shape and size of the insertion groove are matched with the shape and size of the rectangular rod so that the rectangular rod can be stably inserted into the insertion groove.

[0033] The stirring needle mechanism includes a conical member 13 having a plurality of side planes 14 on the outer side wall, and the side wall of the conical member 13 is provided with a spiral groove 15.

[0034] It is to be noted that the above description is only the preferred embodiments of the present application and is not intended to limit the present application, although the present application has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or equivalently replace some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A friction stir welding tool, characterized by: The utility model provides a kind of clamping mechanism for being fixed on the handle of friction stir welding machine, detachably connected transition connecting mechanism in the bottom of clamping mechanism, removable connection shaft shoulder mechanism capable of removing welding flash in the bottom of transition connecting mechanism and fixedly arranged stir pin mechanism in the bottom of shaft shoulder mechanism.

2. A friction stir welding tool according to claim 1, wherein: The shaft shoulder mechanism includes a shaft shoulder body detachably connected to the bottom of the transition connecting mechanism through a mounting member; the bottom end of the shaft shoulder body is a circular ring inclined surface, the height of the outer periphery profile of the circular ring inclined surface is greater than the height of the inner periphery profile of the circular ring inclined surface, an outer annular groove is provided on the bottom surface of the shaft shoulder body at the position where the inner periphery profile of the circular ring inclined surface meets, at least one inner annular groove is provided on the bottom surface of the shaft shoulder body between the outer annular groove and the stir pin mechanism, and a plurality of welding flash guide grooves are provided on the circumference of the side wall of the shaft shoulder body at intervals, the bottom of each welding flash guide groove penetrates the circular ring inclined surface, and the bottom of each welding flash guide groove is in communication with the outer annular groove.

3. A friction stir welding tool according to claim 2, wherein: The mounting member includes a mounting rod inserted into the transition connecting mechanism and fixedly arranged on the top of the shaft shoulder body, and two fastening bolts threadedly connected to the side wall of the transition connecting mechanism, the ends of the two fastening bolts abut against the mounting rod to fix the mounting rod.

4. A friction stir welding tool according to claim 3, wherein: The stir pin mechanism includes a conical member with a plurality of side planes on the outer side wall, and a helical groove is provided on the side wall of the conical member.

5. A friction stir welding tool according to claim 4, wherein: The clamping mechanism includes a clamping handle, and two clamping planes are milled on the opposite positions of the outer wall of the clamping handle.

6. A friction stir welding tool according to any one of claims 1 to 5, wherein: The transition connecting mechanism includes a cylindrical member fixedly arranged on the bottom of the clamping mechanism and a circular truncated cone member fixedly arranged on the bottom of the cylindrical member.

7. A friction stir welding tool according to claim 6, wherein: A liquid injection pipe is provided in communication on the cylindrical member, a cylindrical helical first cooling liquid channel is arranged in the cylindrical member, a circular conical helical second cooling liquid channel is arranged in the circular truncated cone member; a sealing cover is detachably connected to the liquid injection pipe, the liquid injection pipe is in communication with the first cooling liquid channel, and the first cooling liquid channel and the second cooling liquid channel are in communication.

8. A friction stir welding tool according to any one of claims 1 to 5, 7 wherein: The clamping mechanism, the transition connecting mechanism, the shaft shoulder mechanism and the stir pin mechanism are all coated with a thermal insulation coating made of composite magnesium aluminum silicate.

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