阅读说明：本技术 一种适用于骨架焊接的结构及焊接方法 (Structure suitable for skeleton welding and welding method ) 是由 陈艳霞 王维浩 刘志刚 卢云龙 于 2021-09-30 设计创作，主要内容包括：本发明公开了一种适用于骨架焊接的结构及焊接方法,涉及骨架焊接工艺技术领域,包括左侧板和右侧板,所述左侧板和右侧板的顶端和底端均向其垂直方向延伸出固定长度且用于拼接在一起并焊接的长条,所述左侧板和右侧板的顶侧左、右两端均设有连接组件,所述左侧板和右侧板的焊接处留有焊缝且在焊接面增加2mm焊接余量,所述左侧板和右侧板的拼接处焊接面的两端各留30mm焊接余量,该发明通过改进的左侧板和右侧板和使用搅拌摩擦焊的焊接方法,具有为零件之间的连接和装配提供了较大的裕度,同时减轻了结构重量的优点。(The invention discloses a structure suitable for skeleton welding and a welding method, and relates to the technical field of skeleton welding processes, wherein the structure comprises a left side plate and a right side plate, the top ends and the bottom ends of the left side plate and the right side plate extend out of long strips which have fixed lengths in the vertical direction and are used for being spliced together and welded, connecting components are arranged at the left end and the right end of the top sides of the left side plate and the right side plate, welding seams are reserved at the welding positions of the left side plate and the right side plate, welding allowance of 2mm is added on the welding surfaces, and welding allowance of 30mm is reserved at the two ends of the welding surfaces at the splicing positions of the left side plate and the right side plate.)

1. The utility model provides a be applicable to skeleton welded structure, includes left side board (1) and right side board (2), its characterized in that, the top and the bottom of left side board (1) and right side board (2) all extend the fixed length to its vertical direction and are used for the concatenation and together and welded rectangular, the top side left and right both ends of left side board (1) and right side board (2) all are equipped with coupling assembling (4), the welding department of left side board (1) and right side board (2) leaves welding seam (3) and increases 2mm welding allowance at the face of weld, the both ends of the concatenation department face of weld of left side board (1) and right side board (2) respectively leave 30mm welding allowance.

2. A structure suitable for skeleton welding according to claim 1, characterized in that the left side plate (1) is of an elongated structure as a whole.

3. A structure suitable for skeleton welding according to claim 1, characterized in that the bottom side of the left side plate (1) near the left end connecting component (4) is provided with a square recess (5).

4. A structure suitable for skeleton welding according to claim 1, characterized in that the right side plate (2) is of an overall elongated structure.

5. A structure suitable for skeleton welding according to claim 1, characterized in that, the bottom side of the right side plate (2) is provided with a square recess (5) near the right end connecting component (4), and the right side of the left end connecting component (4) of the right side plate (2) is provided with a square hole (6).

6. A structure suitable for skeleton welding according to claim 1, characterized in that, the coupling assembling (4) is a screw boss or a clamping boss.

7. The structure suitable for skeleton welding of claim 6, wherein the screw boss is a structure with a screw hole at the center and a protrusion at the inner side and a recess at the outer side.

8. The framework welding structure according to claim 6, wherein the clamping boss on the left side plate (1) is of a structure with a convex inner side and a concave outer side, the clamping boss on the right side plate (1) is of a structure with a convex outer side and a concave inner side, and the clamping boss on the left side plate (1) is consistent with the clamping boss on the right side plate (1) in overall shape.

9. A method of welding a structure adapted for skeleton welding, the method being for use with a structure according to any one of claims 1-6, the method comprising the steps of:

s1: the stirring head rotating at a high speed is inserted into a welding seam (3) at the splicing position of the left side plate (1) and the right side plate (2) at a certain inserting speed, when the stirring head is inserted into a set inserting depth, a shaft shoulder of the stirring head is contacted with the surface of a workpiece, and the stirring head stays for 0.2S, so that the stirring head moves along the welding direction and rotates per se;

s2: the heat generated by the friction between the shaft shoulder and the surface of the workpiece and the heat generated by the stirring of the stirring pin enable the temperature of the welding seam (3) material to be raised, the joint metal is fully plastically softened, the softened metal is transferred along with the movement of the stirring pin to form continuous plastic flow, and the metal in the plastic flow and part of metal contacted with the plastic flow generate plastic deformation in different degrees;

s3: the material which generates plastic deformation is filled into the cavity behind the stirring head through the stirring head, and the material connection is realized under the stirring and extruding actions of the shaft shoulder of the stirring head and the stirring needle.

Technical Field

The invention relates to the technical field of skeleton application, in particular to a structure suitable for skeleton welding and a welding method.

Background

The traditional aviation industry aluminum alloy part framework product is a structure formed by connecting and fastening left and right side plates of 2XXX (Al-Cu) series and 7XXX (Al-Zn) series aluminum alloys through screws, the weight of the product is greatly increased by bolts and a boss structure designed for fastening by using the screws in the structure, the assembly space is reduced, and simultaneously, a tail hole is left on a processed framework after welding is finished, so that a structure and a welding method suitable for framework welding need to be researched, and meanwhile, technical storage is carried out for the processing and manufacturing of the aviation industry aluminum alloys.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a structure suitable for skeleton welding and a welding method, so as to solve the problems in the background art.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a be applicable to skeleton welded structure, includes left side board and right side board, the top and the bottom of left side board and right side board all extend the fixed length to its vertical direction and are used for the concatenation and together and welded rectangular, the top side left and right both ends of left side board and right side board all are equipped with coupling assembling, the splice of left side board and right side board leaves the welding seam and increases 2mm welding allowance at the face of weld, the both ends of the splice face of weld of left side board and right side board respectively leave 30mm welding allowance.

Preferably, the left side plate is of an elongated structure as a whole.

Preferably, a square recess is formed in the bottom side of the left side plate close to the left end connecting assembly.

Preferably, the right side plate is of an elongated structure as a whole.

Preferably, a square recess is formed in the position, close to the right end connecting assembly, of the bottom side of the right side plate, and a square hole is formed in the right side of the right side plate left end connecting assembly.

Preferably, the connecting assembly is a screw boss or a clamping boss.

Preferably, the screw boss is a structure with a convex inner side and a concave outer side and a screw hole in the center.

Preferably, the joint boss on the left side board is the structure that the inboard protruding outside is sunken, the joint boss on the right side board is the structure that the protruding inboard in outside is sunken, the joint boss on the left side board is unanimous with the whole shape of the joint boss on the right side board.

Preferably, the welding method of the structure suitable for skeleton welding comprises the following steps:

s1: the stirring head rotating at a high speed is inserted into a welding seam at the splicing position of the left side plate and the right side plate at a certain inserting speed, when the stirring head is inserted to a set inserting depth, a shaft shoulder of the stirring head is contacted with the surface of a workpiece, and the stirring head stays for 0.2S, so that the stirring head moves along the welding direction and rotates per se;

s2: the heat generated by the friction between the shaft shoulder and the surface of the workpiece and the heat generated by the stirring of the stirring pin enable the temperature of a welding seam material to rise, the joint metal is fully plastically softened, the softened metal is transferred along with the movement of the stirring head to form continuous plastic flow, and the metal in the plastic flow and part of metal contacted with the plastic flow generate plastic deformation with different degrees;

s3: the material which generates plastic deformation is filled into the cavity behind the stirring head through the stirring head, and the material connection is realized under the stirring and extruding actions of the shaft shoulder of the stirring head and the stirring needle.

The invention has the following beneficial effects:

firstly, the boss structure of the mounting screw of the traditional framework bolt connecting structure is removed, the weight of the product is reduced, and the assembly space is increased;

secondly, the welding allowance of 2mm is added on the welding surface of the left side plate and the right side plate, the welding allowances of 30mm are reserved at two ends of the welding surface of the left side plate and the right side plate respectively, and the welding allowances are removed during subsequent machining after welding is finished, so that the problem that tail holes are reserved on the framework when friction stir welding is finished is avoided.

Thirdly, the welding seam is formed attractively by friction stir welding butt joint, the internal defects are few, the mechanical property of the joint is good, and the tensile strength of the joint is high;

fourthly, the friction stir welding replaces bolt connection, so that a large margin is provided for connection and assembly of parts, meanwhile, the structure weight is reduced, and more design space is provided for aviation product design.

Fifthly, the two sides of the top ends of the left side plate and the right side plate are connected more conveniently through the designed connecting assembly, and the structural weight of parts is further reduced through a clamping connection mode.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic diagram of a left side plate structure of the present invention;

FIG. 3 is a schematic diagram of a right side plate structure according to the present invention;

fig. 4 is a conventional skeleton screw coupling structure.

Labeled as: 1-left side plate, 2-right side plate, 3-welding seam, 4-connecting component, 5-square recess, 6-square hole and 7-mounting screw boss structure.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

as shown in fig. 2-4, a structure suitable for skeleton welded, including left side board 1 and right side board 2, the top and the bottom of left side board 1 and right side board 2 all extend the fixed length to its vertical direction and are used for the concatenation and together and welded rectangular, the top side left and right both ends of left side board 1 and right side board 2 all are equipped with coupling assembling 4, the welding department of left side board 1 and right side board 2 leaves welding seam 3 and increases 2mm welding allowance at the face of weld, the both ends of the splice face of weld of left side board 1 and right side board 2 respectively leave 30mm welding allowance.

The structure eliminates a mounting screw boss structure 7 (as shown in figure 4) at the middle position of the traditional framework, reduces the weight of a product and increases the assembly space; because the surface quality after friction stir welding can not meet the use requirement, the welding allowance of 2mm is increased on the implemented welding surface; meanwhile, as the tail hole is left when the friction stir welding is finished, if the frame structure is additionally provided with the lead-in plate and the lead-out plate, the investment of the tool is increased, so that welding allowances of 30mm are respectively left at two ends of the welding surface, and the welding allowances are removed when the subsequent machining is finished after the welding is finished, so that the problem that the tail hole is left on the frame when the friction stir welding is finished is solved.

Example 2:

on the basis of embodiment 1, the left side plate 1 is of an elongated structure as a whole.

And a square recess 5 is formed in the position, close to the left end connecting assembly 4, of the bottom side of the left side plate 1.

The right side plate 2 is integrally of a long strip structure.

The position that the bottom side of right side board 2 is close to right-hand member coupling assembling 4 is equipped with square cave 5, the right side of 2 left end coupling assembling 4 of right side boards is equipped with square hole 6.

The connecting component 4 is a screw boss.

The screw boss is a structure with a screw hole in the center and a concave outer side, the screw hole is used for connecting the two sides of the top ends of the left side plate 1 and the right side plate 2 through the screw hole, and the connection is firmer due to the arranged convex structure in the inner side.

Example 3:

on the basis of embodiment 1, the left side plate 1 is of an elongated structure as a whole.

And a square recess 5 is formed in the position, close to the left end connecting assembly 4, of the bottom side of the left side plate 1.

The right side plate 2 is integrally of a long strip structure.

The position that the bottom side of right side board 2 is close to right-hand member coupling assembling 4 is equipped with square cave 5, the right side of 2 left end coupling assembling 4 of right side boards is equipped with square hole 6.

The connecting assembly 4 is a clamping boss.

The joint boss on the left side board 1 is the sunken structure in the protruding outside in inboard, the joint boss on the right side board 2 is the protruding sunken structure in inboard in the outside, the joint boss on the left side board 1 is unanimous with the whole shape of the joint boss on the right side board 2, and this structure is when using, inlays the arch of 1 inboard in the left side board in the sunken of 2 inboard in the right side board, has realized that the top both sides joint of left side board 1 and right side board 2 is connected, and the structure weight of part has further been lightened to this structure.

A method of welding a structure suitable for skeleton welding, comprising the steps of:

s1: the stirring head rotating at a high speed is inserted into a welding seam 3 at the splicing position of the left side plate 1 and the right side plate 2 at a certain inserting speed, when the stirring head is inserted to a set inserting depth, a shaft shoulder of the stirring head is contacted with the surface of a workpiece, and the stirring head stays for 0.2S, so that the stirring head moves along the welding direction and rotates per se;

s2: the heat generated by the friction between the shaft shoulder and the surface of the workpiece and the heat generated by the stirring of the stirring pin enable the temperature of the welding seam 3 material to rise, the joint metal is fully plastically softened, the softened metal is transferred along with the movement of the stirring head to form continuous plastic flow, and the metal in the plastic flow and part of the metal contacted with the plastic flow generate plastic deformation with different degrees;

s3: the material which generates plastic deformation is filled into the cavity behind the stirring head through the stirring head, and the material connection is realized under the stirring and extruding actions of the shaft shoulder of the stirring head and the stirring needle.

The left side plate 1 and the right side plate 2 of the traditional framework are improved, so that the weight of a product is reduced, and the assembly space is increased; through friction stir welding butt joint, welding seam 3 shaping is pleasing to the eye, and internal defect is few, connects mechanical properties well, connects tensile strength higher, because friction stir welding exists the deformation, to the structure and the size that require the strictness on the skeleton, need weld the back and carry out further processing.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make several variations and modifications without departing from the concept of the present invention, and these should be considered as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.