A protective device for friction stir welding

Abstract

This utility model relates to the field of friction stir welding technology, and more particularly to a protective device for friction stir welding. The device comprises a plurality of protective components arranged in an array on the workpiece to be welded. Each protective component includes a connecting mechanism and a liftable baffle mechanism. The connecting mechanism is detachably mounted on the workpiece to be welded. The liftable baffle mechanism is fixedly mounted on the connecting mechanism and is used to block debris generated during the friction stir welding process. This utility model provides a protective device for friction stir welding, solving the technical problem of poor versatility of existing protective devices.

Description

Technical Field

[0001] This utility model relates to the field of friction stir welding technology, and in particular to a protective device for friction stir welding. Background Technology

[0002] Friction stir welding refers to the use of heat generated by the friction between a high-speed rotating welding tool and the workpiece to locally melt the materials to be welded. As the welding tool moves forward along the welding interface, the plasticized material flows from the front to the rear of the welding tool under the action of the rotational friction force of the welding tool, and forms a dense solid phase weld under the extrusion of the welding tool.

[0003] During friction stir welding, the stirring rod rotates at high speed and rubs against the workpiece. During this process, debris is generated from the workpiece and is flung around the welding point by centrifugal force. To prevent debris splattering, protective devices are typically installed on both sides of the welding path. Most existing protective devices are single-piece protective plates. Straight-line welding requires a straight protective plate, while curved welding requires an arc-shaped protective plate. This results in limited applicability of existing protective devices. Utility Model Content

[0004] This invention provides a protective device for friction stir welding, which solves the technical problem of poor versatility of existing protective devices.

[0005] To achieve this technical objective, the present invention adopts the following solution: a protective device for friction stir welding, comprising multiple protective components distributed in an array on the workpiece to be welded;

[0006] The protective components include a connecting mechanism and a liftable baffle mechanism.

[0007] The connecting mechanism is detachably mounted on the workpiece to be welded;

[0008] The liftable baffle mechanism is fixedly mounted on the connecting mechanism and is used to block the debris generated during friction stir welding.

[0009] Furthermore, the connecting mechanism includes two symmetrically distributed support legs;

[0010] The support leg includes two spaced suction cups that adhere to the surface of the workpiece to be welded. A screw is rotatably connected to the top of the suction cups, and a support plate is slidably fitted onto the screw. A knob is threadedly connected to the top of the screw, and the bottom of the knob abuts against the top surface of the support plate.

[0011] A spring is fitted around the outside of the screw, with the two ends of the spring abutting against the support plate and the suction cup, respectively.

[0012] Furthermore, the liftable baffle mechanism includes a fixed baffle and a movable baffle;

[0013] The fixed baffle is a box structure with an open top and a hollow interior. The fixed baffle is fixedly mounted on the support plate. A vertically extending through slot is provided on one side of the fixed baffle, and a horizontally extending limiting baffle with a notch is provided on both sides of the through slot.

[0014] The movable baffle is slidably inserted into the fixed baffle. A crossbar is fixedly provided on one side wall of the movable baffle. The crossbar is slidably set in the through groove. A limiting block is rotatably sleeved on the outside of the crossbar. A handle is fixedly provided at the end of the limiting block away from the movable baffle.

[0015] Furthermore, the limiting block has a pointed structure, which can pass through the gap between the limiting baffles;

[0016] The side of the limiting block away from the pointed structure is a plane, and the plane abuts against the limiting baffle.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] The protective device for friction stir welding disclosed in this utility model adopts multiple protective components distributed in an array. When straight welding is required, the protective components can be spliced ​​into a straight line. When curved welding is required, the protective components can be spliced ​​into a curve, thereby meeting the requirements of various situations and improving applicability. Attached Figure Description

[0019] Figure 1 A schematic diagram of a protective device for friction stir welding provided in an embodiment of this utility model;

[0020] Figure 2 A schematic diagram of the protective component provided in this embodiment of the utility model:

[0021] Figure 3 for Figure 2 Enlarged view of section A in the middle;

[0022] Figure 4 A schematic diagram of another state of the protective component provided in this embodiment of the utility model:

[0023] Figure 5 An exploded schematic diagram of some parts of the protective assembly provided in this embodiment of the utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Protective components; 11. Connecting mechanism; 111. Support leg; 1111. Suction cup; 1112. Screw; 1113. Support plate; 1114. Knob; 1115. Spring; 12. Liftable baffle mechanism; 121. Fixed baffle; 1211. Through groove; 1212. Limiting baffle; 122. Movable baffle; 1221. Crossbar; 1222. Limiting block; 12221. Point structure; 12222. Plane; 1223. Handle; 2. Workpiece to be welded; 21. Joint seam. Detailed Implementation

[0026] To fully understand the purpose, features and effects of this utility model, the following specific embodiments will be used to describe this utility model in detail, but this utility model is not limited thereto.

[0027] like Figures 1 to 5 As shown, the present invention provides a protective device for friction stir welding, comprising multiple protective components 1 arranged in an array on the workpiece 2 to be welded. Each protective component 1 includes a connecting mechanism 11 and a liftable baffle mechanism 12. The connecting mechanism 11 is detachably mounted on the workpiece 2 to be welded, and the liftable baffle mechanism 12 is fixedly mounted on the connecting mechanism 11. The liftable baffle mechanism 12 is used to block debris generated during the friction stir welding process.

[0028] Furthermore, the connecting mechanism 11 includes two symmetrically distributed support legs 111. Each support leg 111 includes two spaced-apart suction cups 1111, which adhere to the surface of the workpiece 2 to be welded. A screw 1112 is rotatably connected to the top of each suction cup 1111. A support plate 1113 is slidably fitted onto the screw 1112. A knob 1114 is threadedly connected to the top of the screw 1112, and the bottom of the knob 1114 abuts against the top surface of the support plate 1113. A spring 1115 is fitted around the screw 1112, with both ends of the spring 1115 abutting against the support plate 1113 and the suction cups 1111, respectively.

[0029] Furthermore, the liftable baffle mechanism 12 includes a fixed baffle 121 and a movable baffle 122. The fixed baffle 121 is a box structure with an open top and a hollow interior. The fixed baffle 121 is fixedly mounted on the support plate 1113. A vertically extending through groove 1211 is provided on one side of the fixed baffle 121, and laterally extending limiting baffles 1212 with notches are provided on both sides of the through groove 1211. The movable baffle 122 is slidably inserted into the fixed baffle 121. A crossbar 1221 is fixedly mounted on one side wall of the movable baffle 122. The crossbar 1221 is slidably mounted in the through groove 1211, and a limiting block 1222 is rotatably sleeved on the outside of the crossbar 1221. A handle 1223 is fixedly mounted on the end of the limiting block 1222 away from the movable baffle 122.

[0030] Furthermore, the limiting block 1222 is a pointed structure 12221, which can pass through the gap between the limiting baffles 1212. The side of the limiting block 1222 away from the pointed structure 12221 is a flat surface 12222, which abuts against the limiting baffles 1212.

[0031] In use, first select an appropriate number of protective components 1 and place them on both sides of the workpiece joint 21 (i.e., the weld seam after welding). Then, place one protective component 1 at the head or tail of the joint 21, press the suction cup 1111, and simultaneously rotate the knob 1114 corresponding to the suction cup 1111. This causes the knob 1114 to press the support plate 1113, which in turn presses the spring 1115. The spring 1115 then presses the suction cup 1111, completely expelling the air from the suction cup 1111, thus firmly adhering the suction cup 1111 to the upper surface of the workpiece 2 to be welded. Following this method, install each protective component 1 sequentially onto the workpiece 2 to be welded along the joint 21.

[0032] If the height of the fixed baffle 121 is insufficient to block the debris flying out during welding, the handle 1223 can be grasped and rotated to align the tip structure 12221 of the limiting block 1222 with the notch between the limiting baffles 1212. Then, the handle 1223 is moved upwards, carrying the limiting block 1222 and the crossbar 1221 upwards. Simultaneously, the movable baffle 122 moves upwards until the limiting block 1222 passes through the notch between the limiting baffles 1212 and the plane 12222 abuts against the limiting baffle 1212. At this point, the movable baffle 122 is held back by the limiting baffle 1212 and will not fall, thus fulfilling the function of blocking the upper space of the fixed baffle 121. When it is necessary to retract the movable baffle 122, simply turn the handle 1223 so that the tip structure 12221 faces downward, and move the handle 1223 downward so that the limit block 1222 passes through the gap between the limit baffles 1212 again.

[0033] It should be noted that the limiting baffle 1212 is made of a material with a certain degree of elasticity, such as an iron sheet. By setting the pointed structure 12221, the limiting block 1222 can pass through the gap between the limiting baffles 1212 more easily. In addition, it is necessary to ensure that the width of the plane 12222 is greater than the aforementioned gap, so as to prevent the limiting block 1222 from falling through the gap.

[0034] Finally, it should be noted that the above-listed embodiments are merely preferred embodiments of the present invention. Of course, those skilled in the art can make modifications and variations to the present invention. If such modifications and variations fall within the scope of the claims of the present invention and their equivalents, they should be considered as being within the protection scope of the present invention.

Claims

1. A protective device for friction stir welding, characterized by, It includes multiple protective components (1) distributed in an array on the workpiece (2) to be welded; The protective component (1) includes a connecting mechanism (11) and a liftable baffle mechanism (12). The connecting mechanism (11) is detachably mounted on the workpiece (2) to be welded; The liftable baffle mechanism (12) is fixedly mounted on the connecting mechanism (11), and the liftable baffle mechanism (12) is used to block the debris generated during the friction stir welding process.

2. The protective device for friction stir welding according to claim 1, characterized in that, The connecting mechanism (11) includes two symmetrically distributed support legs (111); The support leg (111) includes two spaced suction cups (1111) that are adsorbed onto the surface of the workpiece (2) to be welded. A screw (1112) is rotatably connected to the top of the suction cup (1111). A support plate (1113) is slidably sleeved on the screw (1112). A knob (1114) is threadedly connected to the top of the screw (1112). The bottom of the knob (1114) abuts against the top surface of the support plate (1113). A spring (1115) is sleeved on the outside of the screw (1112), and the two ends of the spring (1115) abut against the support plate (1113) and the suction cup (1111) respectively.

3. A protective device for friction stir welding as defined in claim 2, wherein The liftable baffle mechanism (12) includes a fixed baffle (121) and a movable baffle (122); The fixed baffle (121) is a box structure with an open top and a hollow interior. The fixed baffle (121) is fixedly mounted on the support plate (1113). A vertically extending through groove (1211) is provided on one side of the fixed baffle (121). A horizontally extending limiting baffle (1212) with a notch is provided on both sides of the through groove (1211). The movable baffle (122) is slidably inserted into the fixed baffle (121). A crossbar (1221) is fixedly provided on one side wall of the movable baffle (122). The crossbar (1221) is slidably disposed in the through groove (1211). A limiting block (1222) is rotatably sleeved on the outside of the crossbar (1221). A handle (1223) is fixedly provided at the end of the limiting block (1222) away from the movable baffle (122).

4. A protective device for friction stir welding as defined in claim 3, wherein The limiting block (1222) is a pointed structure (12221), and the pointed structure (12221) can pass through the gap between the limiting baffles (1212); The side of the limiting block (1222) away from the tip structure (12221) is a plane (12222), and the plane (12222) abuts against the limiting baffle (1212).

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