CN212239592U - Shaft shoulder structure for static shaft shoulder friction stir welding tool - Google Patents
Shaft shoulder structure for static shaft shoulder friction stir welding tool Download PDFInfo
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- CN212239592U CN212239592U CN202020352927.2U CN202020352927U CN212239592U CN 212239592 U CN212239592 U CN 212239592U CN 202020352927 U CN202020352927 U CN 202020352927U CN 212239592 U CN212239592 U CN 212239592U
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- friction stir
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Abstract
The utility model discloses a shaft shoulder structure for quiet shaft shoulder friction stir welding instrument relates to the welding technology field. The static shaft shoulder is fixedly arranged on a non-rotating part of the friction stir welding tool; the static shaft shoulder is of a hollow structure and is provided with a static shaft shoulder hole, a discharging tangent plane and a discharging hole; one end of the stirring head is used for being mounted on a main shaft cutter handle of the friction stir welding tool, the other end of the stirring head penetrates through the static shaft shoulder and extends out of the static shaft shoulder hole, and the stirring head is in clearance fit with the static shaft shoulder. The utility model provides a pair of a shaft shoulder structure for quiet shaft shoulder friction stir welding instrument can be convenient when realizing that the welding seam does not have to reduce and does not have overlap, improves welding instrument radiating efficiency, and then stability and the life-span that improves the instrument and use.
Description
Technical Field
The utility model relates to the field of welding technique, especially, relate to a shaft shoulder structure for quiet shaft shoulder friction stir welding instrument.
Background
Friction Stir Welding (FSW) is a new solid phase joining technique invented in 1991 by The Welding Institute, TWI. The process is that a stirring head consisting of a shaft shoulder and a stirring needle is inserted into a welding seam and moves forwards while rotating at a high speed, materials to be welded are plasticized by utilizing friction heat, plastic flow is generated under the driving of the stirring head, the welding seam is formed under the forging and pressing action of the shaft shoulder, and solid-phase connection is realized.
The stirring head is a core component of friction stir welding, provides heat required by material plasticization in the welding process through friction with workpieces, and is a carrier for directional material flow in a welding seam area. In the friction stir welding process, due to the rotation and extrusion of the stirring head, plastic materials in the welding line can overflow out of the welding line area to form 'flash', so that the welding line area is slightly thinner than the base metal, and the surface quality and the joint performance of the welding line are not facilitated. At present, in industrial production, mechanical polishing is often needed to remove flash, so that the production efficiency is reduced, and the surface quality of a welded workpiece is easily damaged.
The design and manufacture of the stirring head are key technologies for realizing friction stir welding, and related mechanisms at home and abroad carry out a great deal of research on the aspects of shape design, material selection, processing technology and the like of the stirring head. At present, there are two main ways to eliminate flash: firstly, designing a shaft shoulder end face of a special stirring head; secondly, a device or a structure is additionally arranged on the stirring head, for example, a cutting head or the outer edge of a shaft shoulder is added to be processed into a cutting groove. However, both methods do not eliminate the burrs well, and the first method can reduce the amount of the burrs but cannot completely eliminate the burrs, and the second method causes poor weld surface quality due to the adhesion of the burrs to the stirring head due to the high temperature of the burrs. However, the static shaft shoulder friction stir welding tool has a relatively complex structure, works in a high-temperature environment for a long time, and meanwhile, the shaft shoulder of the stirring head and the hole of the static shaft shoulder need to be in clearance fit and require high rotation precision, so that the heat dissipation of the tool is particularly important. Therefore, how to realize that the welding seam is not thinned and has no flash, the heat dissipation efficiency of the welding tool is improved, the use stability of the tool is improved, and the service life of the tool is significant.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects of the prior art, the utility model discloses a main aim at provides a shaft shoulder structure for quiet shaft shoulder friction stir welding instrument, can conveniently improve welding instrument radiating efficiency when realizing that the welding seam does not have to reduce and does not have the overlap, and then stability and the life-span that improve the instrument use.
In order to achieve the above purpose, the technical solution of the present invention is as follows:
a shaft shoulder structure for a static shaft shoulder friction stir welding tool is characterized by comprising a stirring head and a static shaft shoulder, wherein the static shaft shoulder is fixedly arranged on a non-rotating part of the friction stir welding tool; the static shaft shoulder is of a hollow structure and is provided with a static shaft shoulder hole, a discharging tangent plane and a discharging hole; one end of the stirring head is used for being mounted on a main shaft cutter handle of the friction stir welding tool, the other end of the stirring head penetrates through the static shaft shoulder and extends out of the static shaft shoulder hole, and the stirring head is in clearance fit with the static shaft shoulder.
Optionally, the number of the discharging tangent planes is two, the two discharging tangent planes are symmetrically distributed, and the distance between the two discharging tangent planes is larger than the diameter of the end face of the static shaft shoulder.
Optionally, the discharge section is parallel to a welding direction of the friction stir welding tool.
Optionally, the number of the discharge holes is multiple and the discharge holes are symmetrically distributed;
optionally, a plurality of said discharge holes are distributed in one plane or a plurality of planes;
optionally, the stirring head is provided with a clamping handle, a positioning step, a shaft shoulder and a stirring pin; the clamping handle is used for being installed on the main shaft tool handle, the positioning step is used for limiting the installation position of the stirring head, the shaft shoulder is used for eliminating flash, and the stirring needle is arranged on the shaft shoulder.
Optionally, the shaft shoulder is of a cylindrical structure, the shaft shoulder penetrates through the static shaft shoulder hole and is in clearance fit with the static shaft shoulder, and the difference between the diameter of the shaft shoulder and the diameter of the static shaft shoulder is 0.05-0.5 mm.
Optionally, the shaft shoulder penetrates through and extends out of the dead shaft shoulder hole by 0.1-0.8 mm.
Optionally, the shoulder is provided with a threaded groove or concentric ring groove for discharge.
Optionally, the depth of the thread groove or the concentric ring groove is 0.1-1.2 mm.
The utility model provides a pair of a shaft shoulder structure for quiet shaft shoulder friction stir welding instrument is equipped with tangent plane and the relief hole that is used for arranging the material through being equipped with the thread groove that is used for arranging the material at the stirring head and quiet shaft shoulder, improves welding process's row material efficiency, prevents the wearing and tearing that the instrument produced because of the stopper to improve the precision and the life of instrument.
The utility model provides a pair of a shaft shoulder structure for quiet shaft shoulder friction stir welding instrument has following advantage:
1. the generation of flash can be effectively avoided in the welding process, and a high-quality welding seam with a smooth surface is obtained;
2. by the extrusion effect of the end face of the static shaft shoulder, the welding seam material is extruded into the welding seam as much as possible, so that the welding seam thinning is reduced or avoided, and the mechanical property of the joint is improved;
3. the material seepage in the welding process is better eliminated, the rotation precision of the tool in the welding process is ensured, the stability of the welding process is improved, and the service life of the tool is prolonged;
4. the welding process has no flash, the surface of the welding seam is smooth, the manual polishing process is reduced, and the production efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is an exploded schematic view of a shoulder structure for a static shoulder friction stir welding tool according to an embodiment of the present invention;
FIG. 2 is a schematic view of the assembled shoulder structure shown in FIG. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following description will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1 and 2, the present invention provides a shaft shoulder structure for a static shaft shoulder friction stir welding tool, which generally comprises a stirring head 1 and a static shaft shoulder 2. The pin tool 1 can be mounted on a spindle shank (not shown) of a friction stir welding tool, and the stationary shoulder 2 is fixedly mounted on a non-rotating part of the friction stir welding tool (not shown) through an outer cover or a connecting piece (not shown). The interior of the static shaft shoulder 2 is of a hollow structure, one end of the static shaft shoulder 2 is provided with a static shaft shoulder hole 21, and the peripheral wall of the static shaft shoulder 2 is provided with a discharging tangent plane 22 and a discharging hole 23 which are communicated with the hollow structure in the static shaft shoulder. The number of the discharge holes 23 is plural and symmetrically distributed. The plurality of discharge holes 23 may be distributed in one plane or in multiple planes. The other end part of the stirring head 1 is arranged in the hollow structure of the static shaft shoulder 2 in a penetrating way and extends out of the static shaft shoulder hole 21. The stirring head 1 is in clearance fit with the static shaft shoulder 2, so that after assembly, the stirring head 1 is not in contact with the static shaft shoulder 2. That is, when the pin 14 and the shoulder 13 are rotated by the pin 1 during welding, the stationary shoulder 2 is in a stationary state.
Specifically, the stirring head 1 is provided with a clamping handle 11, a positioning step 12, a shaft shoulder 13 and a stirring pin 14. The stirring pin 14 is disposed on the shaft shoulder 13. The clamping shank 11 comprises a clamping portion cylinder 16 and a clamping surface 15 provided at the clamping portion cylinder 16. The clamping surface 15 facilitates the clamping so that the mixing head 1 can be easily mounted on a work bench. During assembly, the stirring head 1 is clamped on the universal tool shank of the main shaft through the clamping handle 11 and is fixed by a jackscrew through the clamping surface 15. The static shaft shoulder 2 is fixed on the non-rotating part of the main shaft through the outer cover, the positioning step 12 is used for limiting the mounting position of the stirring head 1, the clamping handle 11 is prevented from being mounted too deeply or too shallowly, the length of the shaft shoulder 13 extending out of the static shaft shoulder hole 21 is ensured, and the shaft shoulder 13 of the stirring head 1 is ensured to be in uniform clearance fit with the static shaft shoulder hole 21 of the static shaft shoulder 2, so that eccentricity is avoided.
In one particular embodiment, the shoulder 13 is of cylindrical configuration. The shaft shoulder 13 is arranged in the static shaft shoulder hole 21 in a penetrating way and is in clearance fit with the static shaft shoulder 2. Optionally, the difference between the diameter of the shaft shoulder 13 and the diameter of the bore of the dead shaft shoulder hole 21 is 0.05 to 0.5 mm. The length of the shaft shoulder 13 penetrating through and extending out of the end face of the dead axle shoulder hole 21 is 0.1-0.8 mm. The design can ensure that the end face of the shaft shoulder 13 passing through the static shaft shoulder 2 plays a role of extrusion, so that the welding seam material is extruded into the welding seam as much as possible, the thinning of the welding seam is reduced or avoided, the mechanical property of the joint is improved, the generation of flash can be effectively avoided, and the high-quality welding seam with a smooth surface is obtained. Optionally, the end surface of the shoulder 13 is a flat surface, a concave surface or a spiral line structure.
Further, as shown in fig. 1, the shoulder 13 is provided with a thread groove or a concentric ring groove for discharging. The depth of the thread groove or the concentric ring groove is 0.1-1.2 mm. In the welding process, the seepage enters the tool through the gap between the static shaft shoulder hole 21 and the shaft shoulder 13 of the stirring head, goes upward through a thread groove or a concentric ring groove on the cylindrical section of the shaft shoulder 13, a small part of seepage is discharged through a discharge hole 23 of the static shaft shoulder 2 in the upward process, and the rest seepage continues to go upward to a discharge tangent plane 22 of the static shaft shoulder, so that all the seepage is discharged out of the tool.
The stationary shoulder 2 is provided with two discharge sections 22. The two discharge sections 22 are symmetrically distributed on the circumferential wall of the stationary shoulder 2, so that the discharge sections communicate with the hollow space inside the stationary shoulder 2, and the remaining seepage is discharged out of the tool through the discharge sections 22. Optionally, the discharge cut 22 is parallel to the welding direction of the friction stir welding tool to ensure that the static shoulder 2 has sufficient strength under the action of the advancing resistance. The distance between the two discharging tangent planes 22 is larger than the end surface diameter of the end of the static shaft shoulder 2 provided with the static shaft shoulder hole 21. By the design, the extrusion effect of the end face of the static shaft shoulder can be met, so that the welding seam material is extruded into the welding seam as much as possible, the welding seam thinning is reduced or avoided, and the mechanical property of the joint is improved; the material leakage in the welding process can be better eliminated, the rotation precision of the tool in the welding process is ensured, the stability of the welding process is improved, and the service life of the tool is prolonged.
The utility model provides a pair of a shaft shoulder structure for quiet shaft shoulder friction stir welding instrument has following advantage:
1. the generation of flash can be effectively avoided in the welding process, and a high-quality welding seam with a smooth surface is obtained;
2. by the extrusion effect of the end face of the static shaft shoulder, the welding seam material is extruded into the welding seam as much as possible, so that the welding seam thinning is reduced or avoided, and the mechanical property of the joint is improved;
3. the material seepage in the welding process is better eliminated, the rotation precision of the tool in the welding process is ensured, the stability of the welding process is improved, and the service life of the tool is prolonged;
4. the welding process has no flash, the surface of the welding seam is smooth, the manual polishing process is reduced, and the production efficiency is improved.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A shaft shoulder structure for a static shaft shoulder friction stir welding tool is characterized by comprising a stirring head and a static shaft shoulder, wherein the static shaft shoulder is fixedly arranged on a non-rotating part of the friction stir welding tool; the static shaft shoulder is of a hollow structure and is provided with a static shaft shoulder hole, a discharging tangent plane and a discharging hole; one end of the stirring head is used for being mounted on a main shaft cutter handle of the friction stir welding tool, the other end of the stirring head penetrates through the static shaft shoulder and extends out of the static shaft shoulder hole, and the stirring head is in clearance fit with the static shaft shoulder.
2. The shaft shoulder structure of claim 1, wherein the number of the discharging sections is two, and the two discharging sections are symmetrically distributed, and the distance between the two discharging sections is larger than the diameter of the end face of the stationary shaft shoulder.
3. A shoulder construction according to claim 1 or 2 wherein the discharge section is parallel to the welding direction of the friction stir welding tool.
4. The shoulder structure of claim 1 wherein the plurality of discharge holes are symmetrically disposed.
5. A shoulder structure as set forth in claim 4 wherein a plurality of said discharge openings are distributed in a single plane or in a plurality of planes.
6. The shaft shoulder structure of claim 1, wherein the stirring head is provided with a clamping handle, a positioning step, a shaft shoulder and a stirring pin; the clamping handle is used for being installed on the main shaft tool handle, the positioning step is used for limiting the installation position of the stirring head, the shaft shoulder is used for eliminating flash, and the stirring needle is arranged on the shaft shoulder.
7. The shaft shoulder structure of claim 6, wherein the shaft shoulder is a cylindrical structure, the shaft shoulder is inserted into the bore of the stationary shaft shoulder and is in clearance fit with the stationary shaft shoulder, and the difference between the diameter of the shaft shoulder and the bore diameter of the bore of the stationary shaft shoulder is 0.05-0.5 mm.
8. The shaft shoulder structure of claim 6 or 7, wherein the shaft shoulder penetrates through and extends out of the dead shaft shoulder hole by 0.1-0.8 mm.
9. A shoulder construction according to claim 6 or 7 wherein the shoulder is provided with a threaded or concentric annular groove for discharge.
10. The shoulder structure of claim 9 wherein the depth of the thread groove or the concentric ring groove is 0.1 to 1.2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020352927.2U CN212239592U (en) | 2020-03-19 | 2020-03-19 | Shaft shoulder structure for static shaft shoulder friction stir welding tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020352927.2U CN212239592U (en) | 2020-03-19 | 2020-03-19 | Shaft shoulder structure for static shaft shoulder friction stir welding tool |
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| CN212239592U true CN212239592U (en) | 2020-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020352927.2U Active CN212239592U (en) | 2020-03-19 | 2020-03-19 | Shaft shoulder structure for static shaft shoulder friction stir welding tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114985895A (en) * | 2022-05-31 | 2022-09-02 | 国营四达机械制造公司 | Method for realizing two-mode friction stir welding based on one set of stirring head tool |
-
2020
- 2020-03-19 CN CN202020352927.2U patent/CN212239592U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114985895A (en) * | 2022-05-31 | 2022-09-02 | 国营四达机械制造公司 | Method for realizing two-mode friction stir welding based on one set of stirring head tool |
| CN114985895B (en) * | 2022-05-31 | 2023-06-09 | 国营四达机械制造公司 | Method for realizing two-mode friction stir welding based on one set of stirring head tool |
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