A microwave box side processing fixture

Abstract

The present invention relates to the field of mechanical processing, and specifically discloses a side processing fixture for a microwave box body, comprising a base, wherein two sides of the top of the base are respectively provided with a column A and a column B; the opposite sides of the columns A and B are provided with lifting guide rails, and also comprising lifting jaws A and lifting jaws B, wherein the lifting guide rail A is installed in cooperation with the lifting guide rail on the column A, and the lifting guide rail B is installed in cooperation with the lifting guide rail on the column B, and the bottoms of the lifting jaws A and lifting jaws B are connected through a jaw bottom plate, a clamping guide rail is fixed on the jaw bottom plate, and a clamping jaw slidably connected to the clamping guide rail is installed on the clamping guide rail; a positioning plate is fixed at one end of the positioning ejector pin. The advantages of the present invention are that the fixture is easy to operate, and the clamping and positioning are simple and quick; at the same time, the self-centering design allows the microwave box body to be processed on the other side in only two steps after one side is clamped, without the need to re-align the origin.

Description

Technical Field

[0001] The invention relates to the field of mechanical processing, in particular to a clamp for processing the side surface of a microwave box body. Background Art

[0002] Microwave boxes are important structural components in military and aerospace products. Their typical features include cavity structures on the front and back sides and holes, grooves, and bosses on the side. These features require high consistency, especially the side dimensions. In order to avoid dimensional errors caused by processing deformation, the clamping must be as accurate and reliable as possible.

[0003] Since microwave boxes are typical multi-variety and small-batch products with various sizes, traditional clamping methods such as combination fixtures have a great impact on processing efficiency. So far, no one has conducted special research on microwave box fixtures. In actual production, in order to ensure the processing accuracy of the side of the microwave box, some companies have introduced multi-axis machining machines to process multiple surfaces at one time to ensure accuracy and consistency, but the cost is high and it is easy to cause processing interference. Some companies also configure high-precision probes for machine tools to adjust errors in the processing process. This method has a relatively high investment cost, and some machine tools do not support probes, so it is difficult to actually apply it. Summary of the invention

[0004] In order to overcome the defects of the above-mentioned prior art, the present invention provides a clamp for side processing of microwave box body parts with low cost, simple operation and high clamping efficiency. Combined with the process flow, the device can complete four side processing in one clamping while ensuring the part size requirements.

[0005] The object of the present invention is achieved by the following technical solution: A microwave box body side processing fixture, comprising a base, and a column A and a column B are respectively arranged on both sides of the top of the base;

[0006] A bearing mounting hole A is horizontally arranged on the column A, a linear bearing A is installed in the bearing mounting hole A, and a rotating ejector pin is arranged in the linear bearing A;

[0007] A bearing mounting hole B is horizontally arranged on the column B, a linear bearing B is installed in the bearing mounting hole B, and a positioning ejector pin is arranged in the linear bearing B;

[0008] The sides opposite to the column A and the column B are both provided with lifting guide rails, and also include lifting jaws A and lifting jaws B. The lifting guide rail A is installed in cooperation with the lifting guide rail on the column A, and the lifting guide rail B is installed in cooperation with the lifting guide rail on the column B. The bottoms of the lifting jaws A and lifting jaws B are connected through a jaw bottom plate, a clamping guide rail is fixed on the jaw bottom plate, and a clamping jaw slidably connected to the clamping guide rail is installed in cooperation with the clamping guide rail;

[0009] The lifting jaws A, lifting jaws B and clamping jaws are provided with waist-shaped holes, and a clamping guide column is provided between the columns A and B, and the clamping guide column passes through the waist-shaped holes on the lifting jaws A, lifting jaws B and clamping jaws;

[0010] A positioning plate is fixed to one end of the positioning ejector pin;

[0011] The column B is provided with a threaded hole, a locking bolt is threadedly connected to the threaded hole, and a clamping block is provided on one side of the column B with the clamping jaws.

[0012] Furthermore, buckles are provided on both sides of the rotating ejector pin, a clamping block A is provided inside the buckle A, and an anti-loosening spring A is provided between the clamping block A and the column A.

[0013] Furthermore, one end face of the positioning ejector pin is provided with two centrally symmetrical truncated cones, and the other end is provided with a fixing groove, the bottom of which is provided with a threaded hole, and the line between the vertices of the two truncated cones is parallel to the center line of the fixing groove to ensure a self-centering effect.

[0014] Furthermore, buckles B are provided on both sides of the positioning ejector, a clamping block B is provided on the buckle B, and an anti-loosening spring B is provided between the clamping block B and the column B.

[0015] Furthermore, the positioning plate is provided with a boss which cooperates with the fixing groove.

[0016] Furthermore, the positioning plate is provided with four pin holes which are inclined at several tens of degrees from each other and are located on the same diameter circle and gradually change from deep to shallow. The center line of the upper and lower holes is parallel to the long side of the boss. The column B is provided with a positioning pin hole, and a compression spring is provided in the positioning pin hole. A pin is also provided in the positioning pin hole, one end of the pin is connected to the compression spring, and the other end is placed in the pin hole.

[0017] Furthermore, a lifting spring is arranged between the jaw bottom plate and the base, one end of the lifting spring is fixed on the jaw bottom plate, and the other end is fixed on the base.

[0018] Furthermore, the upright column A and the upright column B are provided with clamping guide column mounting holes, and both ends of the clamping guide column are installed with the clamping guide column by interference fit.

[0019] Furthermore, a clamping spring is provided on the clamping guide column between the lifting jaw A and the clamping jaw, and two ends of the clamping spring are respectively abutted against the lifting jaw A and the clamping jaw.

[0020] Furthermore, the clamping block is provided with a through hole, and the clamping guide column passes through the through hole.

[0021] The present invention has the following advantages:

[0022] 1. The present invention discloses a side processing fixture for a microwave box body. A positioning hole is pre-pointed at the margin on the back of the microwave box body. When in use, the clamping jaws are loosened, the driven hand wheel is pulled, the microwave box body is placed between the clamping jaws and the lifting jaws B, and the conical boss of the positioning ejector is aligned with the center hole, and then the driven hand wheel is loosened and the clamping block is locked to fix it.

[0023] 2. The clamp provided by the present invention is easy to operate, and with the optimization of the process flow, the clamping and positioning are simple and fast. At the same time, the self-centering design of the present invention allows the microwave box body to be clamped on one side and then processed on the other side in just two steps without the need to re-align the origin. In addition, the lifting jaw structure can avoid the occurrence of processing interference and is suitable for the processing of microwave boxes of various sizes.

[0024] 3. The present invention can cooperate with bench drill, general milling machine, CNC milling machine, machining center and other equipment to complete the side processing of the microwave box body, which greatly reduces the equipment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a front view of the present invention;

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 3 It is a structural cross-sectional view of the present invention;

[0028] Figure 4 This is a schematic diagram of the positioning ejector pin of the present invention;

[0029] Figure 5 It is a schematic diagram of the positioning plate of the present invention;

[0030] Figure 6 It is a schematic diagram of the column 2 of the present invention;

[0031] Figure 7 It is a schematic diagram of the rotary ejector of the present invention;

[0032] Figure 8 This is a schematic diagram of the clamping effect of the present invention;

[0033] Fig. 9 for Figure 4 A cross-sectional view;

[0034] In the figure: 1-base, 2-clamping guide rail, 3-jaw bottom plate, 4-rotating ejector, 41-buckle A, 5-lifting spring, 6-lifting guide rail, 7-column A, 8-follower hand wheel, 9-lifting jaw A, 10-clamping spring, 11-clamping jaw, 12-clamping block, 13-clamping guide column, 14-locking bolt, 15-positioning ejector, 151-fixing groove, 152-threaded hole, 153-buckle B, 154-truncated cone, 16-lifting jaw B, 17-positioning plate, 171-boss, 172-pin hole, 18-column B, 181-positioning pin hole, 19-anti-loosening spring B, 20-block B, 21-block A, 22-anti-loosening spring A, 23-linear bearing B, 24-linear bearing A, 25-positioning pin, 26-microwave box body. DETAILED DESCRIPTION

[0035] The present invention is further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0036] like Figures 1 to 9 As shown, a microwave box body side processing fixture includes a base 1, and two sides of the top of the base 1 are respectively provided with a column A7 and a column B18;

[0037] A bearing mounting hole A is horizontally arranged on the column A7, a linear bearing A24 is installed in the bearing mounting hole A, and a rotating ejector pin 4 is arranged in the linear bearing A24;

[0038] A bearing mounting hole B is horizontally arranged on the column B18, a linear bearing B23 is installed in the bearing mounting hole B, and a positioning ejector pin 15 is arranged in the linear bearing B23;

[0039] The sides opposite to the column A7 and the column B18 are both provided with a lifting guide rail 6, and also include a lifting jaw A9 and a lifting jaw B16, the lifting jaw A9 is installed in cooperation with the lifting guide rail 6 on the column A7, the lifting jaw B16 is installed in cooperation with the lifting guide rail 6 on the column B18, the bottoms of the lifting jaw A9 and the lifting jaw B16 are connected through a jaw bottom plate 3, a clamping guide rail 2 is fixed on the jaw bottom plate 3, and a clamping jaw 11 slidably connected to the clamping guide rail 2 is installed in cooperation with the clamping guide rail 2;

[0040] The lifting jaw A9, the lifting jaw B16 and the clamping jaw 11 are provided with waist-shaped holes, and a clamping guide column 13 is provided between the column A7 and the column B18, and the clamping guide column 13 passes through the waist-shaped holes on the lifting jaw A9, the lifting jaw B16 and the clamping jaw 11;

[0041] A positioning plate 17 is fixed to one end of the positioning ejector pin 15;

[0042] The column B18 is provided with a threaded hole, in which a locking bolt 14 is threadedly connected, and the clamping jaw 11 is provided with a clamping block 12 on one side of the column B18.

[0043] Furthermore, buckles A41 are provided on both sides of the rotating ejector 4, a clamping block A21 is provided inside the buckle A41, an anti-loosening spring A22 is provided between the clamping block A21 and the column A7, and a follower hand wheel 8 is provided at one end of the rotating ejector 4.

[0044] Furthermore, one end face of the positioning ejector pin 15 is provided with two centrally symmetrical frustums 154, and the other end is provided with a fixing groove 151. The bottom of the fixing groove 151 is provided with a threaded hole 152. The line between the vertices of the two frustums 154 is parallel to the center line of the fixing groove 151 to ensure a self-centering effect.

[0045] Furthermore, buckles B153 are provided on both sides of the positioning ejector pin 15, a clamping block B20 is provided on the buckle B153, and an anti-loosening spring B19 is provided between the clamping block B20 and the column B18.

[0046] Furthermore, the positioning plate 17 is provided with a boss 171 that cooperates with the fixing groove 151 .

[0047] Furthermore, the positioning plate 17 is provided with four pin holes 172 which are 90 degrees to each other and located on the same diameter circle and gradually change from deep to shallow. The center line of the upper and lower pin holes 172 is parallel to the long side of the boss 171. The column B18 is provided with a positioning pin hole 181, and a compression spring 27 is provided in the positioning pin hole 181. A positioning pin 25 is also provided in the positioning pin hole 181, and one end of the positioning pin 25 is connected to the compression spring 27, and the other end is placed in the pin hole 172.

[0048] Furthermore, a lifting spring 5 is provided between the jaw bottom plate 3 and the base 1 , and one end of the lifting spring 5 is fixed on the jaw bottom plate 3 , and the other end is fixed on the base 1 .

[0049] Furthermore, the upright column A7 and the upright column B18 are provided with clamping guide column mounting holes, and both ends of the clamping guide column 13 are installed with interference fit in the clamping guide column mounting holes.

[0050] Furthermore, a clamping spring 10 is provided on the clamping guide column 13 between the lifting jaw A9 and the clamping jaw 11, and two ends of the clamping spring 10 are respectively in contact with the lifting jaw A9 and the clamping jaw 11.

[0051] Furthermore, the clamping block 12 is provided with a through hole, and the clamping guide column 13 passes through the through hole.

[0052] The working process of the present invention is as follows: fix the base 1 on the machine tool, rotate the locking bolt 14 to move it backward, and the clamping spring 10 pushes the clamping jaw 11 and the clamping block 12 to move backward, and reserve a suitable space between the lifting jaw B16 and the clamping jaw 11, and then pull the positioning plate 17 to make the distance between the positioning ejector pin 15 and the rotating ejector pin 4 also reach a suitable space, and the above-mentioned suitable space refers to the space that can be placed in the microwave box body 26; after the front processing process of the microwave box body 26 is completed, two center holes with central symmetry and a connecting line parallel to the edge are drilled on the back margin, and cooperate with the truncated cone 154 on the positioning ejector pin 15 to achieve self-centering;

[0053] Then, the microwave box body 26 is placed in the space reserved between the lifting jaw B16 and the clamping jaw 11, and the truncated cone 154 of the positioning ejector pin 15 is aligned with the center hole processed on the microwave box body 26. Then, the positioning plate 17 is released. Under the action of the anti-loosening spring B19, the positioning ejector pin 15 automatically rebounds and presses the microwave box body 26. At this time, the rotating ejector pin 4 is extended out of the lifting jaw B16 by a certain distance under the action of the anti-loosening spring A22, and clamps the microwave box body 26 together with the positioning ejector pin 15, so that the front and back sides of the microwave box body 26 are not in contact with the clamping jaw 11 and the lifting jaw B16, and the microwave box body 26 is prevented from falling.

[0054] Adjust the combination of the lifting jaw B16, the jaw bottom plate 3 and the lifting jaw A9 to move up and down to a suitable position, then tighten the locking bolt 14 to lock it, so that the side of the microwave box body 26 extends a certain length, which not only ensures the clamping stability but also avoids processing interference, then rotate the locking screw 14 to push the clamping block 12 to move, the clamping block 12 pushes the clamping jaw 11 to move, and compresses the clamping spring 10 and the anti-loosening spring A22, and rotates the ejector pin 4 to move back 4, until the front of the microwave box body 26 contacts the lifting jaw A9, then continue to rotate the locking screw 14, under the action of friction, the microwave box body 26 is locked, and then start processing;

[0055] After one side is processed, the locking screw 14 is rotated to move backward, the clamping spring 10 pushes the clamping jaws 11 and the clamping block 12 to move backward and leave the back of the microwave box body 26, the anti-loosening spring A22 pushes the microwave box body 26 to move backward, so that the front of it leaves the lifting jaw A9, the positioning plate 17 is pushed back a certain distance, the positioning plate 17 is rotated, the positioning pin 25 slides in the gradual pin hole 172, and after rotating 90°, it reaches the next pin hole 172 and is positioned, and is locked again to complete another side processing;

[0056] Repeat the steps to complete the processing of other surfaces.

[0057] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the above-mentioned technical content without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any changes, modifications, equivalent changes and modifications made to the above embodiments based on the technology of the present invention without departing from the content of the technical solution of the present invention belong to the protection scope of the present technical solution.

Claims

1. A microwave box side processing fixture, characterized in that: It comprises a base (1), wherein two sides of the top of the base (1) are respectively provided with a column A (7) and a column B (18); A bearing mounting hole A is horizontally arranged on the column A (7), a linear bearing A (24) is installed in the bearing mounting hole A, and a rotating ejector pin (4) is arranged in the linear bearing A (24); Buckles A (41) are provided on both sides of the rotating ejector pin (4), a clamping block A (21) is provided inside the buckle A (41), an anti-loosening spring A (22) is provided between the clamping block A (21) and the column A (7), and a follower hand wheel (8) is fixed at one end of the rotating ejector pin (4) by means of bolts; A bearing mounting hole B is horizontally arranged on the column B (18), a linear bearing B (23) is installed in the bearing mounting hole B, and a positioning ejector pin (15) is arranged in the linear bearing B (23); The said column A (7) and the said column B (18) are both provided with a lifting guide rail (6) on the opposite side, and also include a lifting jaw A (9) and a lifting jaw B (16), wherein the said lifting jaw A (9) is installed in cooperation with the lifting guide rail (6) on the column A (7), and the said lifting jaw B (16) is installed in cooperation with the lifting guide rail (6) on the column B (18), and the bottom of the said lifting jaw A (9) and the lifting jaw B (16) are connected through a jaw bottom plate (3), and a clamping guide rail (2) is fixed on the said jaw bottom plate (3), and a clamping jaw (11) slidably connected to the clamping guide rail (2) is installed in cooperation with the said clamping guide rail (2); The lifting jaw A (9), the lifting jaw B (16) and the clamping jaw (11) are provided with waist-shaped holes, and a clamping guide column (13) is provided between the column A (7) and the column B (18), and the clamping guide column (13) passes through the waist-shaped holes on the lifting jaw A (9), the lifting jaw B (16) and the clamping jaw (11); A clamping spring (10) is provided on the clamping guide column (13) between the lifting jaw A (9) and the clamping jaw (11), and its two ends are respectively in contact with the lifting jaw A (9) and the clamping jaw (11); A positioning plate (17) is fixed to one end of the positioning ejector pin (15); The positioning ejector pin (15) is provided with two centrally symmetrical truncated cones (154) on one end surface, and a fixing groove (151) is provided on the other end. A threaded hole (152) is provided at the bottom of the fixing groove (151). The line connecting the vertices of the two truncated cones (154) is parallel to the center line of the fixing groove (151) to ensure self-centering. Buckles B (153) are provided on both sides of the positioning ejector pin (15), a clamping block B (20) is provided on the buckle B (153), and an anti-loosening spring B (19) is provided between the clamping block B (20) and the column B (18); The column B (18) is provided with a threaded hole, and a locking bolt (14) is threadedly connected to the threaded hole. The clamping jaw (11) is located on one side of the column B (18) and is provided with a clamping block (12). The working process of the microwave box side processing fixture is as follows: The base (1) is fixed on the machine tool, and the locking bolt (14) is rotated to move it backward. The clamping spring (10) pushes the clamping jaw (11) and the clamping block (12) to move backward, and a space capable of accommodating the microwave box body (26) is reserved between the lifting jaw A (9) and the clamping jaw (11). Then, the positioning plate (17) is pulled so that the distance between the positioning ejector pin (15) and the rotating ejector pin (4) is also enough to accommodate the microwave box body (26). After the front processing step of the microwave box body (26) is completed, two center holes with symmetry and a connecting line parallel to the edge are drilled on the back margin, and cooperate with the frustum (154) on the positioning ejector pin (15) to achieve self-centering. Then, the microwave box body (26) is placed between the lifting jaws A (9) and the clamping jaws (11), and the truncated cone (154) of the positioning ejector pin (15) is aligned with the center hole processed on the microwave box body (26). Then, the positioning plate (17) is released. Under the action of the anti-loosening spring B (19), the positioning ejector pin (15) automatically rebounds and presses the microwave box body (26). At this time, the rotating ejector pin (4) is extended a certain distance from the lifting jaws A (9) under the action of the anti-loosening spring A (22), and clamps the microwave box body (26) together with the positioning ejector pin (15), so that the front and back sides of the microwave box body (26) are not in contact with the clamping jaws (11) and the lifting jaws A (9), and the microwave box body (26) is prevented from falling. The assembly of the lifting jaw B (16), the jaw bottom plate (3) and the lifting jaw A (9) is adjusted to move up and down to a suitable position, and then the locking bolt (14) is tightened to lock it, so that the side of the microwave box body (26) extends a certain length, and then the locking bolt (14) is rotated to push the clamping block (12) to move, and the clamping block (12) pushes the clamping jaw (11) to move and compresses the clamping spring (10) and the anti-loosening spring A (22), and the rotating ejector pin (4) moves backward until the front of the microwave box body (26) contacts the lifting jaw A (9), and then the locking bolt (14) is continued to be rotated, and the microwave box body (26) is locked under the action of friction, and then processing begins.

2. A microwave box side processing fixture according to claim 1, characterized in that: The positioning plate (17) is provided with a boss (171) that cooperates with the fixing groove (151).

3. A microwave box side processing fixture according to claim 2, characterized in that: The positioning plate (17) is provided with four pin holes (172) which are arranged at 90 degrees to each other and are located on the same diameter circle and gradually change from deep to shallow. The center line of the upper and lower pin holes (172) is parallel to the long side of the boss (171). The column B (18) is provided with a positioning pin hole (181). A compression spring (27) is arranged in the positioning pin hole (181). A positioning pin (25) is also arranged in the positioning pin hole (181). One end of the positioning pin (25) is connected to the compression spring (27), and the other end is placed in the pin hole (172).

4. The microwave box side processing fixture according to claim 1, characterized in that: A lifting spring (5) is provided between the jaw bottom plate (3) and the base (1); one end of the lifting spring (5) is fixed to the jaw bottom plate (3), and the other end is fixed to the base (1).

5. The microwave box side processing fixture according to claim 1, characterized in that: The upright column A (7) and the upright column B (18) are provided with clamping guide column mounting holes, and both ends of the clamping guide column (13) are installed in an interference fit with the clamping guide column mounting holes.

6. A microwave box side processing fixture according to claim 1, characterized in that: The clamping block (12) is provided with a through hole, and the clamping guide column (13) passes through the through hole.

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