Quick clamping device for friction stir welding

Abstract

The utility model provides a quick clamping device for friction stir welding, which comprises a base, a clamping mechanism for quickly clamping a workpiece is arranged at the top of the base, and a fixing component for fixing tools with different heights is arranged in the clamping mechanism. In the clamping mechanism, a motor drives a two-way lead screw to rotate so that a moving block and a clamping frame can move in the opposite directions, the workpiece is clamped and fixed, the two-way lead screw has high clamping precision, the stability and accuracy of the workpiece in the welding process can be ensured, and the welding quality of the workpiece is improved. The problem that in the prior art, the clamping precision of an air cylinder is low is solved, the effect of fixing tools of different heights is achieved through the arranged fixing assembly, in the fixing assembly, a screw rod is rotated through a transverse rod to drive a bottom plate to descend, and therefore the tools with the height lower than that of a clamping frame are fixed.

Description

Technical Field

[0001] The utility model relates to the field of friction stir welding, and more particularly to a quick clamping device for friction stir welding. Background Art

[0002] Friction stir welding refers to the process of locally melting the welded material by the heat generated by the friction between a high-speed rotating welding tool and the workpiece. When the welding tool moves forward along the welding interface, the plasticized material flows from the front of the welding tool to the rear under the action of the rotational friction force of the welding tool, and a dense solid-phase weld seam is formed under the extrusion of the welding tool. When performing friction stir welding on a workpiece, it is necessary to clamp the workpiece to prevent the movement of the workpiece from affecting the welding effect.

[0003] After retrieval, in the prior art, the Chinese patent with the patent application number CN210703280U discloses "a quick clamping device for friction stir welding", which belongs to the engineering application of friction stir welding in the field of aviation manufacturing, and is used for the automatic clamping of friction stir welding parts to improve the clamping efficiency of friction stir welding parts. It includes: a cylinder, a longitudinal wedge block, and a transverse wedge block; the cylinder abuts against the bottom of the longitudinal wedge block, the end of the longitudinal wedge block abuts against the end of the transverse wedge block, and the bottom of the transverse wedge block abuts against the friction stir welding part. The cylinder converts the longitudinal thrust into the transverse clamping force of the friction stir welding part through the longitudinal wedge block and the transverse wedge block. However, there are still the following defects: when it is used, the workpiece is clamped and fixed by the cylinder, but the clamping accuracy of the cylinder is limited to a certain extent, and it may not be ideal for welding tasks with high-precision requirements.

[0004] Therefore, we make improvements and propose a quick clamping device for friction stir welding. Summary of the Utility Model

[0005] The purpose of the utility model is to address the problem that currently, a quick clamping device for friction stir welding clamps and fixes the workpiece through a cylinder when in use, but the clamping accuracy of the cylinder is limited to a certain extent, and it may not be ideal for welding tasks with high-precision requirements.

[0006] To achieve the above-mentioned utility model purpose, the utility model provides the following technical solutions:

[0007] A quick clamping device for friction stir welding to improve the above problems.

[0008] Specifically, the utility model is as follows:

[0009] It includes a base, and a clamping mechanism for quickly clamping the workpiece is arranged on the top of the base. A fixing component for fixing tools of different heights is arranged inside the clamping mechanism;

[0010] The clamping mechanism includes a groove, a bidirectional lead screw, a motor, moving blocks, a clamping frame, an exhaust fan, a housing, and a connecting pipe. The groove is formed at the top of the base. The bidirectional lead screw is rotatably connected inside the groove. The motor is bolted to the outer wall of the base. The moving blocks are threadedly connected to both ends of the bidirectional lead screw. The clamping frame is welded to the tops of the moving blocks. The exhaust fan is bolted to the side wall of the base. The housing is bolted to the top of the base. The connecting pipe is fixedly connected to the output end of the exhaust fan. The output end of the motor is fixedly connected to one end of the bidirectional lead screw. The number of moving blocks and clamping frames is two each and they are symmetrically arranged. One end of the connecting pipe communicates with the inside of the housing.

[0011] As a preferred technical solution of the present utility model, the fixing component includes a lead screw, a bottom plate, and a cross bar. The lead screw is threadedly connected inside the clamping frame. The bottom plate is rotatably connected to the bottom of the lead screw. The cross bar is welded to the top of the bottom plate. The number of lead screws, bottom plates, and cross bars is four each and they are distributed in pairs inside the two clamping frames.

[0012] As a preferred technical solution of the present utility model, a stabilizing groove is formed at the top of the base. A stabilizing block is welded to the bottom of the clamping frame. The stabilizing block is located inside the stabilizing groove and is slidably connected to the stabilizing groove. The number of stabilizing grooves is two and they are symmetrically arranged.

[0013] As a preferred technical solution of the present utility model, a first protective pad is bonded to the bottom of the bottom plate, and a second protective pad is bonded to the side wall of the clamping frame. Both the first protective pad and the second protective pad are made of rubber material.

[0014] As a preferred technical solution of the present utility model, a filter screen is movably connected inside the housing. An installation block is welded to the side wall of the filter screen. A bolt is threadedly connected inside the installation block. One end of the bolt extends into the housing and is threadedly connected to the housing.

[0015] As a preferred technical solution of the present utility model, a rectangular groove for preventing debris from entering the inside of the stabilizing groove is formed at the bottom of the stabilizing groove. The number of rectangular grooves is several and they are evenly distributed. All the several rectangular grooves communicate with the outside of the base.

[0016] As a preferred technical solution of the present utility model, a lighting lamp for facilitating the user to observe the tool to be welded is bolted to the top of the housing. A tempered glass plate is bolted to the top of the housing. The tempered glass plate is located on one side of the lighting lamp.

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

[0018] In the solution of the present utility model:

[0019] 1. Through the provided clamping mechanism, the function of clamping the workpiece with high precision is achieved. In the clamping mechanism, the motor drives the bidirectional lead screw to rotate, causing the moving block and the clamping frame to move in opposite directions, thereby clamping and fixing the workpiece. The bidirectional lead screw clamping has high clamping precision, which can ensure the stability and accuracy of the workpiece during the welding process, and solves the problem of low clamping precision of the cylinder in the prior art;

[0020] 2. Through the provided fixing component, the function of fixing tools with different heights is achieved. In the fixing component, the cross bar rotates the lead screw to drive the bottom plate to descend, thereby fixing the tool with a height lower than that of the clamping frame, improving the versatility of the clamping mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 FIG. is a schematic structural view of the quick clamping device for friction stir welding provided by the present utility model;

[0022] Figure 2 FIG. is a left view of the quick clamping device for friction stir welding provided by the present utility model;

[0023] Figure 3 FIG. is the three-dimensional sectional view of the quick clamping device for friction stir welding provided by the present utility model Figure 2 at A - A;

[0024] Figure 4 FIG. is a bottom view of the quick clamping device for friction stir welding provided by the present utility model;

[0025] Figure 5 FIG. is the quick clamping device for friction stir welding provided by the present utility model Figure 3 and the enlarged view at A.

[0026] Reference numerals in the figures:

[0027] 1, base; 2, clamping mechanism; 3, fixing component; 4, stabilizing groove; 5, stabilizing block; 6, first protective pad; 7, second protective pad; 8, filter screen; 9, mounting block; 10, bolt; 11, rectangular groove; 12, lighting lamp; 13, tempered glass plate; 201, groove; 202, bidirectional lead screw; 203, motor; 204, moving block; 205, clamping frame; 206, exhaust fan; 207, frame; 208, connecting pipe; 301, lead screw; 302, bottom plate; 303, cross bar. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model.

[0029] Therefore, the following detailed description of the embodiments of the present utility model is not intended to limit the scope of the claimed present utility model, but merely represents some embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0030] It should be noted that, without conflict, the embodiments in the present utility model and the features and technical solutions in the embodiments may be combined with each other.

[0031] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0032] As Figures 1-5 shown, this embodiment provides a quick clamping device for friction stir welding, including a base 1. A clamping mechanism 2 for quickly clamping a workpiece is arranged on the top of the base 1, and a fixing component 3 for fixing tools of different heights is arranged inside the clamping mechanism 2;

[0033] The clamping mechanism 2 includes a groove 201, a bidirectional lead screw 202, a motor 203, a moving block 204, a clamping frame 205, an exhaust fan 206, a frame 207, and a connecting pipe 208. The groove 201 is opened on the top of the base 1. The bidirectional lead screw 202 is rotatably connected inside the groove 201. The motor 203 is bolted to the outer wall of the base 1. The moving block 204 is threadedly connected to both ends of the bidirectional lead screw 202. The clamping frame 205 is welded to the top of the moving block 204. The exhaust fan 206 is bolted to the side wall of the base 1. The frame 207 is bolted to the top of the base 1. The connecting pipe 208 is fixedly connected to the output end of the exhaust fan 206. The output end of the motor 203 is fixedly connected to one end of the bidirectional lead screw 202. The number of the moving blocks 204 and the clamping frames 205 is two and they are symmetrically arranged. One end of the connecting pipe 208 is communicated with the inside of the frame 207. When clamping the workpiece, the motor 203 drives the bidirectional lead screw 202 to rotate, so that the clamping frames 205 move in opposite directions, thereby clamping and fixing the workpiece with high precision.

[0034] As Figure 3 and Figure 5As shown, as a preferred embodiment, on the basis of the above method, further, the fixing component 3 includes a lead screw 301, a bottom plate 302 and a cross bar 303. The lead screw 301 is threadedly connected to the inside of the clamping frame 205. The bottom plate 302 is rotatably connected to the bottom of the lead screw 301. The cross bar 303 is welded to the top of the bottom plate 302. The number of the lead screw 301, the bottom plate 302 and the cross bar 303 is four each, and they are distributed in pairs inside the two clamping frames 205. When clamping a tool with a height lower than the clamping frame 205, rotate the lead screw 301 to lower the bottom plate 302, thereby improving the clamping effect on the workpiece. After welding the workpiece, the exhaust fan 206 can increase the air flow speed above the workpiece and improve the heat dissipation effect of the workpiece.

[0035] As Figure 1 shown, as a preferred embodiment, on the basis of the above method, further, a stable groove 4 is formed at the top of the base 1. A stable block 5 is welded to the bottom of the clamping frame 205. The stable block 5 is located inside the stable groove 4 and is slidably connected to the stable groove 4. The number of the stable grooves 4 is two and they are symmetrically arranged. When the clamping frame 205 moves, the clamping frame 205 can move along the stable groove 4, improving the stability of the clamping frame 205 during movement.

[0036] As Figure 3 and Figure 5 shown, as a preferred embodiment, on the basis of the above method, further, a first protective pad 6 is bonded to the bottom of the bottom plate 302, and a second protective pad 7 is bonded to the side wall of the clamping frame 205. Both the first protective pad 6 and the second protective pad 7 are made of rubber material. When clamping the workpiece, the first protective pad 6 and the second protective pad 7 can protect the left and right sides and the top, preventing damage to the surface of the workpiece.

[0037] As Figure 1 , as a preferred embodiment, on the basis of the above method, further, a filter screen 8 is movably connected inside the frame body 207. An installation block 9 is welded to the side wall of the filter screen 8. A bolt 10 is threadedly connected inside the installation block 9. One end of the bolt 10 extends into the frame body 207 and is threadedly connected to the frame body 207. When the exhaust fan 206 drives the heat flow above the workpiece, the filter screen 8 can prevent the debris generated by welding from entering the inside of the frame body 207, improving the service life of the exhaust fan 206.

[0038] As Figure 4As shown, as a preferred embodiment, on the basis of the above method, further, a rectangular groove 11 for preventing debris from entering the inside of the stable groove 4 is opened at the bottom of the stable groove 4. The number of the rectangular grooves 11 is several and they are evenly distributed. All the several rectangular grooves 11 are communicated with the outside of the base 1. When welding a workpiece, debris will be generated. The rectangular groove 11 can prevent the debris from accumulating inside the stable groove 4 and prevent it from affecting the normal use of the stable groove 4.

[0039] As Figure 1 As shown, as a preferred embodiment, on the basis of the above method, further, a lighting lamp 12 for facilitating the user to observe the tool to be welded is bolted to the top of the frame 207. A tempered glass plate 13 is bolted to the top of the frame 207. The tempered glass plate 13 is located on one side of the lighting lamp 12. During welding, the lighting lamp 12 can provide light to facilitate the user to observe the workpiece.

[0040] Specifically, when this friction stir welding quick clamping device is in use: First, place the workpiece on the top of the base 1. At this time, the user connects the motor 203 and the exhaust fan 206 to an external power source, and then starts the motor 203. The motor 203 drives the bidirectional lead screw 202 to rotate, so that the moving blocks 204 and the clamping frames 205 at both ends of the bidirectional lead screw 202 move in opposite directions. At this time, the stable block 5 will slide inside the stable groove 4, thereby improving the stability of the clamping frame 205 when moving, so as to clamp the workpiece. At this time, the second protective pad 7 can protect the workpiece and prevent the workpiece from being damaged. Then, the user rotates the lead screw 301 through the cross bar 303, so that the bottom plate 302 and the first protective pad 6 descend, thereby fixing the workpiece secondly and improving the clamping effect on the workpiece. After clamping, the user can weld the workpiece through an external friction stir welding device. After welding, the user starts the exhaust fan 206. The exhaust fan 206 can accelerate the air flow speed above the tool to be welded, thereby accelerating the cooling of the workpiece.

[0041] All the technical features in this embodiment can be freely combined according to actual needs.

[0042] The above embodiments are the preferred implementation solutions of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the technical solution is within the protection scope of the present invention.

Claims

1. A quick clamping device for friction stir welding, comprising a base (1), characterized in that: A clamping mechanism (2) for quickly clamping a workpiece is arranged on the top of the base (1), and a fixing component (3) for fixing tools of different heights is arranged inside the clamping mechanism (2); The clamping mechanism (2) comprises a groove (201), a bidirectional screw rod (202), a motor (203), a moving block (204), a clamping frame (205), an exhaust fan (206), a frame body (207) and a connecting pipe (208); the groove (201) is opened at the top of the base (1); the bidirectional screw rod (202) is rotatably connected to the inside of the groove (201); the motor (203) is bolted to the outer wall of the base (1); the moving block (204) is threadedly connected to both ends of the bidirectional screw rod (202); the clamping frame (205) is provided with a plurality of movable blocks (204), and the clamping frame (205) is provided with a plurality of movable blocks (205). The frame (205) is welded to the top of the moving block (204), the exhaust fan (206) is bolted to the side wall of the base (1), the frame body (207) is bolted to the top of the base (1), the connecting pipe (208) is fixedly connected to the output end of the exhaust fan (206), the output end of the motor (203) is fixedly connected to one end of the bidirectional screw rod (202), the moving block (204) and the clamping frame (205) are both in two numbers and are symmetrically arranged, and one end of the connecting pipe (208) is connected to the inside of the frame body (207).

2. A quick clamping device for friction stir welding according to claim 1, characterized in that: The fixing assembly (3) comprises a screw rod (301), a base plate (302) and a cross bar (303); the screw rod (301) is threadedly connected to the inside of the clamping frame (205); the base plate (302) is rotatably connected to the bottom of the screw rod (301); the cross bar (303) is welded to the top of the base plate (302); the screw rod (301), the base plate (302) and the cross bar (303) are all four in number and are distributed in pairs inside the two clamping frames (205).

3. A quick clamping device for friction stir welding according to claim 1, characterized in that: A stabilizing groove (4) is provided on the top of the base (1), and a stabilizing block (5) is welded to the bottom of the clamping frame (205). The stabilizing block (5) is located inside the stabilizing groove (4) and is slidably connected to the stabilizing groove (4). The number of the stabilizing grooves (4) is two and they are symmetrically arranged.

4. A quick clamping device for friction stir welding according to claim 2, characterized in that: A first protective pad (6) is bonded to the bottom of the base plate (302), and a second protective pad (7) is bonded to the side wall of the clamping frame (205); both the first protective pad (6) and the second protective pad (7) are made of rubber material.

5. A quick clamping device for friction stir welding according to claim 1, characterized in that: A filter screen (8) is movably connected inside the frame (207), a mounting block (9) is welded to the side wall of the filter screen (8), a bolt (10) is threadedly connected inside the mounting block (9), and one end of the bolt (10) extends into the interior of the frame (207) and is threadedly connected to the frame (207).

6. A quick clamping device for friction stir welding according to claim 3, characterized in that: A rectangular groove (11) is provided at the bottom of the stabilizing groove (4) to prevent debris from entering the interior of the stabilizing groove (4); the rectangular grooves (11) are multiple and evenly distributed, and the multiple rectangular grooves (11) are connected to the outside of the base (1).

7. A quick clamping device for friction stir welding according to claim 1, characterized in that: The top of the frame (207) is bolted with a lighting lamp (12) for facilitating the user to observe the welding tool, and the top of the frame (207) is bolted with a tempered glass plate (13), and the tempered glass plate (13) is located on one side of the lighting lamp (12).

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