CN211588898U

CN211588898U - Low controllable friction stir welding of preforming and shoulder pair of flowing welding set

Info

Publication number: CN211588898U
Application number: CN201922048751.1U
Authority: CN
Inventors: 高祎晗; 秦汉; 岳跃雷; 蒋舒
Original assignee: Kunshan World Wide Special Welding Co ltd
Current assignee: Suzhou Wanzhi New Energy Technology Co ltd
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2020-09-29
Anticipated expiration: 2029-11-25

Abstract

The utility model relates to a two welding tools that flow of friction stir welding combination shaft shoulder of low pressure forming, including clamping part, shaft shoulder portion and stirring needle, the stirring needle sets up the front end at shaft shoulder portion to this stirring needle is the project organization such as cylinder or circular truncated cone, and the front end of stirring needle is equipped with the fillet pointed end, and the front end at shaft shoulder portion is equipped with that inside concentric circular groove is regional and outside helicla flute is regional. The utility model can effectively envelop the welded metal, and is suitable for welding the metal with high plastic degree such as pure aluminum and the like; the self-adaptation of the welding press-in amount is realized; the metal flow on the surface of the welding seam is improved, and the microstructure of the shaft shoulder affected area on the surface layer of the welding seam is improved; the generation of defects such as burrs on the surface of the welding seam is inhibited, and the forming quality of the surface of the welding seam is improved.

Description

Low controllable friction stir welding of preforming and shoulder pair of flowing welding set

Technical Field

The utility model relates to a friction stir welding technical field, concretely relates to controllable friction stir welding of low compression molding combination shoulder double flow welding set.

Background

Friction Stir Welding (FSW) is a welding technique invented by the british welding association in 1991, which has less welding deformation and higher joining strength than other welding processes, and uses a non-consumable rotating tool to generate frictional heat and deformation in the welding zone, thereby forming a welding zone in which the material remains in a solid phase during welding. The welding temperature is lower in the welding process, so that the generation of melting welding defects such as cracks, air holes and the like can be avoided, the tendency of coarsening of the structure is reduced, and the strength and the toughness of a welding joint are improved.

The design of the prior stirring head is single, and the metal with high molding softening degree, such as pure aluminum, 3-series aluminum alloy or copper alloy, is welded in the friction stir welding process, so that the envelope of the molding material is ensured by using a spiral structure at the shaft shoulder position to prevent the material from escaping, and the welding seam structure is compact. In addition, under the special working condition, the conditions of large plate thickness difference, long-distance welding seam and the like cannot ensure the consistency of the press-in amount of the shaft shoulder position, and the influence of the plastic flow state of the whole spiral groove added material on the welding seam position due to the plate thickness change is added. However, due to the single flow mode of the spiral structure at the shaft shoulder position, the heat input of the welding seam is increased, the grain size of the welding seam area is increased, and further the material performance is reduced, on the other hand, the forming quality of the welding seam surface is reduced due to the high heat input of the welding seam surface and the strong stirring effect, and welding defects such as burrs, overburning, peeling and the like are seriously generated.

When friction stir welding is used for welding a product which has a requirement on the surface molding of a welding seam or does not process the surface after welding, a concentric circle or concave shaft shoulder design is often adopted, the plastic flow of a material in a cavity between the shaft shoulder and a workpiece is ensured, and an excellent welding seam surface is further formed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a controllable friction stir welding combination shoulder pair of flowing welding set of low compression molding.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a controllable friction stir welding of low pressure forming makes up axle shoulder double flow welding set, this welding set is including clamping part, axle shoulder portion and stirring needle, the stirring needle sets up the front end at the axle shoulder portion to this stirring needle is cylinder, circular truncated cone or other project organization, and the front end of stirring needle is equipped with fillet tip, and the front end of axle shoulder portion is equipped with the regional and outside helicla flute region of inside concentric circle groove.

Preferably, the bonding tool is high-speed tool steel or nickel-based alloy, tungsten carbide cobalt alloy, Wo-Co alloy steel or polycrystalline cubic boron nitride and the like.

Preferably, the length L of the stirring pin and the welding depth H have the following relation: l is H-0.2 to 0.3 mm.

Preferably, the ratio of the diameter of the inner concentric circular groove area to the width of the outer spiral groove area is 1: 0.2-8.

The utility model has the advantages that: the utility model discloses a have a bit as follows:

1. the welding method can effectively envelop the welded metal and is suitable for welding metal with high plastic degree such as pure aluminum and the like;

2. the welding press-in amount is self-adaptive, and the thickness of the plate is adaptive to the change of-0.3 to +1 mm;

3. the metal flow on the surface of the welding seam is improved, and the microstructure of the shaft shoulder affected area on the surface layer of the welding seam is improved;

4. the generation of defects such as burrs on the surface of the welding seam is inhibited, and the forming quality of the surface of the welding seam is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic perspective view of the present invention;

FIG. 2 is a side view of the present invention;

FIG. 3 is a schematic end view of the shaft shoulder of the present invention;

in the figure: the stirring device comprises a clamping part 1, a shaft shoulder part 2, a stirring pin 3, a fillet end part 4, a concentric circular groove area 5 and a spiral groove area 6.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are used only for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms will be understood by those skilled in the art according to the specific circumstances.

In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between the components, is to be understood broadly, for example, as being either a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 3, the friction stir welding combined shaft shoulder double-flow welding tool with controllable low pressure forming comprises a clamping part 1, a shaft shoulder part 2 and a stirring pin 3, wherein the stirring pin 3 is arranged at the front end of the shaft shoulder part 2, the stirring pin 3 is in a design structure of a cylinder or a cone frustum and the like, a fillet end part 4 is arranged at the front end of the stirring pin 3, and an inner concentric circular groove area 5 and an outer spiral groove area 6 are arranged at the front end of the shaft shoulder part 2.

The inner concentric circular groove area 5 and the outer spiral groove area 6 at the end part of the shaft shoulder part 2 have the functions of effectively enveloping welded metal and are suitable for welding metal with high plasticizing degree, such as pure aluminum and the like; the self-adaptation of the welding press-in amount is realized; the metal flow on the surface of the welding seam is improved, and the microstructure of the shaft shoulder affected area on the surface layer of the welding seam is improved; the generation of defects such as burrs on the surface of the welding seam is inhibited, and the forming quality of the surface of the welding seam is improved.

The fillet end of the stirring pin 3 is convenient for welding operation, and the occurrence of the condition that the head of the stirring pin 3 is stuck with a knife is avoided.

The welding tool is made of materials such as high-speed tool steel, nickel-based alloy, tungsten carbide cobalt alloy, Wo-Co alloy steel or polycrystalline cubic boron nitride.

The relation between the length L of the stirring pin 3 and the welding depth H is as follows: l is H-0.2 to 0.3 mm.

The ratio of the diameter of the inner concentric circular groove area to the width of the outer spiral groove area is 1: 0.2-8.

Use the utility model discloses a welding method of soldering set includes following step:

A) selecting the specification of the welding tool according to the welding seam interval, wherein the length of the stirring pin 3 is adapted to the welding depth L which is H-0.2-0.3 mm;

B) the product is wiped by acetone or alcohol and the like to remove oil stains on the surface, and burrs on the surface of the welding line are removed by a file or a edger, so that the gap of the welding line is ensured to be less than 0.4mm, and the flatness is good;

C) fixing the product on a working table surface by using a quick tool or a special tool, using a tool setting device to perform tool setting on a welding tool, ensuring that the position of a welding seam is positioned on the axis of the stirring pin 3, and ensuring that the coordinate error of the pressing-in direction is within 0.1-0.5 mm;

D) and installing a stirring head for welding.

In the step D), the welding tool is pressed in from a welding starting point, the pressing depth of the shaft shoulder is 0.05-0.5 mm, welding is carried out by a welding process of 200-5000 rpm and 50-3000 mm/min, welding is carried out along the central line of a welding line, the welding tool stays to a leading-out position, and the welding process is finished.

It should be understood that the above-described embodiments are merely illustrative of the preferred embodiments of the present invention and the technical principles thereof. It will be understood by those skilled in the art that various modifications, equivalents, changes, and the like can be made to the present invention. However, these modifications are within the scope of the present invention as long as they do not depart from the spirit of the present invention. In addition, certain terms used in the specification and claims of the present application are not limiting, but are used merely for convenience of description.

Claims

1. The utility model provides a controllable friction stir welding of low briquetting combines shoulder double flow welding set which characterized in that, this welding set is including clamping part (1), shoulder (2) and stirring pin (3), stirring pin (3) set up the front end in shoulder (2) to this stirring pin (3) are cylinder structure or circular cone structure, and the front end of stirring pin (3) is equipped with fillet tip (4), and the front end of shoulder (2) is equipped with inside concentric circle groove region (5) and outside helicla flute region (6).

2. The friction stir welding combined shoulder dual flow bonding tool with low pressing molding controllability as claimed in claim 1, wherein the bonding tool is made of high speed tool steel or nickel-based alloy, tungsten carbide cobalt alloy, Wo-Co alloy steel or polycrystalline cubic boron nitride.

3. The friction stir welding combined shoulder dual-flow welding tool with the controllable low pressure forming as claimed in claim 1, wherein the ratio of the diameter of the inner concentric circular groove region to the width of the outer spiral groove region is 1: 0.2-8.

4. The friction stir welding combined shoulder dual-flow welding set with controllable low extrusion molding according to claim 1, wherein the relation between the length L of the stirring pin (3) and the welding depth H is as follows: l is H-0.2 to 0.3 mm.