Static shoulder friction stir welding stirring head main body device for rail transit

Abstract

The utility model discloses a stationary shoulder friction stir welding stirring head body device for rail transit. The stationary shoulder friction stir welding stirring head body device comprises a supporting cover, a stirring needle, a fastening nut and a stationary shoulder. A stirring needle is clamped in a tool handle spindle of the machine tool equipment; a supporting cover is fixedly sleeved outside the machine tool equipment cutter handle main shaft; the fastening nut is fixed outside the supporting cover after fixing the static shaft shoulder; the stirring needle is sleeved with the static shaft shoulder, and the static shaft shoulder does not make contact with the stirring needle. The welding line quality requirement is met, meanwhile, the base metal welding line thinning amount is small, the welding line heat affected zone range is small, flashes are not generated in the welding process, the workload of manually grinding and polishing the welding line flashes after welding is small, and the product quality and the production efficiency are improved.

Description

Technical Field

[0001] This utility model belongs to the field of assembly tooling technology and relates to a main body device for a static shoulder friction stir welding head for rail transit, which is mainly used for static shoulder friction stir welding of monorail vehicles and APM train components. Background Technology

[0002] With the development of society, economy and cities, public transportation, as an important part of urban transportation, will become a priority project for major cities. Monorail trains and APM trains, as urban passenger transportation tools, have advantages such as safety, comfort, low noise and low cost, and have attracted the attention of major cities.

[0003] like Figure 1 The diagram shown is a schematic of the location of the friction stir weld on the roof. Currently, rotating shoulder friction stir welding is used in the production of APM roofs. During the welding process, the base material is significantly thinned due to the high-speed rotation and downward pressure of the stirring head shoulder. Furthermore, the simultaneous high-speed rotation of the shoulder and stirring head results in a large heat-affected zone and a significant amount of burrs generated during welding. Post-weld, manual grinding and polishing of these burrs is a labor-intensive process. Summary of the Invention

[0004] To address the shortcomings and deficiencies of existing technologies, the present invention aims to provide a main body device for a static shoulder friction stir welding head for rail transit. This device is mainly used for static shoulder friction stir welding of monorail vehicles and APM train components. It meets the weld quality requirements while minimizing the thinning of the base material weld, reducing the heat-affected zone of the weld, preventing the generation of burrs during the welding process, and minimizing the workload of manual grinding and polishing of the weld burrs after welding, thereby improving product quality and production efficiency.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] The main body of the friction stir welding head for rail transit includes a support cover, a stirring needle, a fastening nut, and a stationary shoulder; the stirring needle is clamped inside the spindle of the machine tool tool holder; the support cover is fixedly mounted on the outer sleeve of the spindle of the machine tool tool holder; the fastening nut fixes the stationary shoulder and then fixes it outside the support cover; the stationary shoulder is sleeved on the outside of the stirring needle, but the stationary shoulder does not rotate and does not contact the stirring needle.

[0007] Furthermore, the support cover is bolted to the outside of the machine tool tool holder spindle.

[0008] Furthermore, the bottom of the support cover is provided with a skirt, and the skirt is provided with screw holes; the skirt is placed on the bottom step of the machine tool tool holder spindle, and the skirt is fixed to the bottom step by bolts provided in the screw holes.

[0009] Further, the fastening nut is located outside the static shaft shoulder and the support cover.

[0010] Further, the fastening nut is located outside the static shaft shoulder and the support cover.

[0011] Further, the fastening nut is located outside the static shaft shoulder and the support cover.

[0012] Further, the fastening nut is located outside the static shaft shoulder and the support cover.

[0013] Further, the fastening nut is located outside the static shaft shoulder and the support cover.

[0014] Further, the fastening nut is located outside the static shaft shoulder and the support cover.

[0015] Further, the fastening nut is located outside the static shaft shoulder and the support cover.

[0016] The advantages of the present application are as follows:

[0017] (1) The static shaft shoulder stirring friction welding stirring head main body device for rail transit is used, and no welding flash is generated on both sides of the weld seam due to the high-speed rotation and downward pressure of the shaft shoulder during the welding process, the loss of the base material during the welding process is small, and the weld seam thinning amount of the base material is small (<0.5 mm);

[0018] (2) The static shaft shoulder stirring friction welding stirring head main body device for rail transit is used, and only the stirring needle rotates at high speed and advances to generate friction heat with the base material during the welding process, the shaft shoulder does not rotate, the heat affected zone of the weld seam is small, and the strength of the weld seam region is increased (can reach more than 80% of the strength of the base material);

[0019] (3) The static shaft shoulder stirring friction welding stirring head main body device for rail transit is used, the weld seam surface is smooth after welding, and the forming is beautiful, manual polishing of the flash on both sides of the weld seam is not needed, the labor intensity of personnel is reduced, and the production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic view of the stirring friction welding weld seam position of the roof;

[0021] Figure 2 It is a schematic view of the static shaft shoulder stirring friction welding stirring head main body device for rail transit;

[0022] Figure 3 It is a sectional view of the support cover and the main shaft connection of the machine tool equipment;

[0023] Figure 4 Support cover, fastening nut, shaft shoulder connection sectional view;

[0024] Figure 5 Machine tool holder spindle, stirring needle connection sectional view;

[0025] Figure 6 Stirring needle, shaft shoulder connection sectional view;

[0026] Figure 7 The utility model discious a rail transit static axle shoulder friction stir welding stirring head main body device sectional view;

[0027] Among them, 1 machine tool equipment holder spindle, 2 support cover, 21 skirt, 22 screw hole, 3 stirring needle, 4 fastening nut, 5 axle shoulder, 51 convex ring. DETAILED DESCRIPTION

[0028] The utility model will be further explained below in connection with the drawings and examples.

[0029] As Figure 2 The utility model discious a rail transit static axle shoulder friction stir welding stirring head main body device includes support cover 2, stirring needle 3, fastening nut 4 and axle shoulder 5, machine tool equipment holder spindle 1 clamps stirring needle 3, and support cover 2 is connected with machine tool equipment holder spindle 1 by bolt, and fastening nut 4 is fixed axle shoulder 5 and is connected in support cover 2 on the screw thread, and the cooperation of the above four components forms the rail transit static axle shoulder friction stir welding stirring head main body device of the embodiment, and the static axle shoulder friction stir welding of each part of the aluminum alloy train body can be carried out.

[0030] The static axle shoulder friction stir welding experiment of train generally verifies the two components of roof or underframe respectively, and the embodiment expands the explanation of the static axle shoulder friction stir welding of roof.

[0031] As Figure 1 The utility model discious the weld position of roof friction stir welding.

[0032] Among them, as Figure 3 The utility model discious the weld position of roof friction stir welding.

[0033] Specifically, support cover 2 is fixedly connected on the outside of machine tool equipment holder spindle 1 by bolt.

[0034] More specifically, the bottom of support cover 2 is equipped with a circle of protruding skirt 21, and a circle of screw holes 22 is evenly arranged on skirt 21, as Figure 2 And Figure 3As shown. The skirt 21 is placed on the bottom step of the machine tool tool holder spindle 1. The skirt 21 is fixed to the bottom step by placing bolts in the screw hole 22, thereby fixing the support cover 2 to the outside of the machine tool tool holder spindle 1.

[0035] The main function of the support cover 2 is to provide static support and fixation for the shoulder 5 after the support cover 2 is rigidly connected to the machine tool tool holder spindle 1 by bolts, so that the shoulder 5 does not interfere with the dynamic high-speed rotation of the machine tool tool holder spindle 1 inside the support cover 2.

[0036] Among them, such as Figure 4 As shown, the fastening nut 4 is located on the outside of the shoulder 5 and the support cover 2. The fastening nut 4 fixes the shoulder 5 by threaded connection and is also threaded on the outside of the support cover 2 (that is, the upper and lower parts of the inner side of the fastening nut 4 are both threaded: the upper part of the inner side of the fastening nut 4 is threaded to the outer side of the shoulder 5, and the lower part of the inner side of the fastening nut 4 is threaded to the outer side of the support cover 2). The main function of the fastening nut 4 is to fix the shoulder 5 and the support cover 2 in a static connection, and to fasten and support the shoulder 5.

[0037] Among them, such as Figure 5 As shown, the machine tool spindle 1 holds the stirring pin 3, meaning the stirring pin 3 is connected to the end of the machine tool spindle 1 and can rotate at high speed. The main function of the stirring pin 3 is to be fixed on the machine tool spindle 1. By rotating at high speed and moving forward, the stirring pin 3 generates heat through high-speed friction at the contact point with the aluminum alloy roof profile (base material), thus making the aluminum alloy metal in that part thermoplastic.

[0038] Among them, such as Figure 6 As shown, the shoulder 5 is fixed inside the fastening nut 4 and located outside the stirring needle 3. The inside of the shoulder 5 is designed to mimic the shape of the stirring needle 3, but the shoulder 5 does not contact the stirring needle 3.

[0039] Preferably, a raised ring 51 is provided on the outer side of the shoulder 5. The raised ring 51 is located between the top of the support cover 2 and the upper part of the fastening nut 4, forming a sandwich structure to further fix and support the shoulder 5.

[0040] More preferably, a raised ring 51 is provided on the outer middle or lower part of the shoulder 5.

[0041] The shoulder 5 in this embodiment is made of steel.

[0042] The main function of the shaft shoulder 5 is to make the hot plastic state aluminum alloy metal formed by the high-speed rotation and forward movement of the stirring pin 3 on the base material to flow from the front end to the rear end (the front end refers to the to-be-welded area in the welding route, and the rear end refers to the welded area in the welding route, i.e. the weld forming area) under the action of the downward pressure of the shaft shoulder 5 (in this embodiment, the static shaft shoulder friction stir welding head main body device is fixedly connected to the machine tool spindle tool holder 1 through threads, and the shaft shoulder 5 is driven by the constant pressure of the machine tool spindle tool holder 1 to generate the downward pressure), so as to form a whole on the welding part.

[0043] The above only describes the preferred example embodiments of the present application, and does not constitute a limitation on the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A static shoulder friction stir welding tool body device for rail transportation, characterized by, The static shoulder friction stir welding tool body device comprises a support cover, a stirring needle, a fastening nut and a static shoulder; the stirring needle is clamped in the tool holder spindle of the machine tool; the support cover is fixed outside the tool holder spindle of the machine tool; the fastening nut is fixed outside the support cover; the static shoulder is sleeved outside the stirring needle, but does not rotate and does not contact the stirring needle.

2. The static shoulder friction stir welding tool body apparatus for rail transportation as claimed in claim 1 wherein, The support cover is connected outside the tool holder spindle of the machine tool by bolts.

3. The static shoulder friction stir welding tool body apparatus for rail transportation as claimed in claim 2 wherein, The bottom of the support cover is provided with a skirt, and screw holes are arranged on the skirt; the skirt is placed on the bottom step of the tool holder spindle of the machine tool, and the skirt and the bottom step are fixed by bolts arranged on the screw holes.

4. The static shoulder friction stir welding tool body device for rail transit according to any one of claims 1-3, characterized in that, The fastening nut is located outside the static shoulder and the support cover.

5. The static shoulder friction stir welding tool body apparatus for rail transportation as claimed in claim 4 wherein, The fastening nut is connected outside the static shoulder and outside the support cover by threads.

6. The static shoulder friction stir welding tool body apparatus for rail transportation as claimed in claim 5 wherein, The upper part and the lower part of the inner side of the fastening nut are both provided with threads: the upper part of the inner side of the fastening nut is connected with the outer side of the static shoulder by threads, and the lower part of the inner side of the fastening nut is connected with the outer side of the support cover by threads.

7. The static shoulder friction stir welding tool body apparatus for rail transportation as recited in any one of claims 1-3, wherein, The static shoulder is sleeved outside the end of the stirring needle, and the inside of the static shoulder is profiled with the outer shape of the end of the stirring needle.

8. The static shoulder friction stir welding tool body apparatus for rail transportation as recited in any one of claims 1-3, wherein, The outer side of the static shoulder is provided with a ring of convex rings, and the convex rings are located between the top end of the support cover and the upper part of the fastening nut.

9. The static-shoulder friction stir welding tool body apparatus for rail transportation as claimed in claim 8, wherein, The convex rings are located in the middle of the outer side of the static shoulder.

10. The static shoulder friction stir welding tool body apparatus for rail transportation as recited in any one of claims 1-3, wherein, The material of the static shoulder is steel.

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