Multi-station self-centering machining tooling for irregular products

Abstract

This invention provides a multi-station self-centering machining fixture for irregular products, including a base, a support seat, a clamping device, a clamping seat, and a support base B. The support seat has a positioning device, the clamping seat has a clamping device, and the support base B has an intermediate support device. The positioning device includes a positioning wedge located on the side surface of the support seat, with two guide positioning posts. The positioning wedge is fixedly connected to the side surface of the support seat by bolts A. A spring A is installed in the middle hole of the positioning wedge, and the spring A is connected to a limiting screw on the side surface of the support seat. This invention has low manufacturing cost, can automatically center and determine the center, rationally allocate clamping positions, provide quick and efficient clamping, has a reliable clamping method, minimizes workpiece deformation, effectively controls vibration during processing, and can greatly reduce the labor intensity of workers and reduce the scrap rate of products.

Description

Technical Field

[0001] This invention belongs to the field of machinery, and specifically relates to a multi-station self-centering machining fixture for irregular products.

[0002] Existing technologies include various brake pad products, which are cast blanks requiring symmetrical centering machining at specific locations. These products have very few clamping points, making precise positioning of these points difficult and hindering rapid clamping. Furthermore, due to the risk of deformation, rough machining followed by finish machining is necessary to prevent excessive material removal and deformation. Traditional machining methods use simple positioning fixtures to locate one side, calculate the distance to the center, compensate it in the machining center's coordinate system, and then machine. However, inconsistent casting dimensions require continuous correction. Secondly, the clamping process necessitates adjusting the pressure plate position to prevent it from being touched by the machining tool, resulting in lengthy adjustments. Rough machining requires large-scale material removal in a single pass, demanding high clamping force and posing a risk of misalignment, thus hindering mass production and batch production. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a multi-station self-centering machining fixture for irregular products.

[0004] The technical solution of the present invention is implemented as follows: a multi-station self-centering processing fixture for irregular products includes a base, on which a support seat, a clamping device, a top clamping seat, and a support base B are provided. The support seat is provided with a positioning device, the top clamping seat is provided with a clamping device, and the support base B is provided with an intermediate support device. The positioning device includes a positioning wedge provided in the side facade of the support seat, and the positioning wedge is provided with two guide positioning posts. The positioning wedge is fixedly connected to the side facade of the support seat by bolts A. A spring A is provided in the middle hole of the positioning wedge, and the spring A is connected to a limiting screw on the side facade of the support seat.

[0005] Preferably, the tightening device includes two tightening guide posts, which are located on the inner side of the side facade of the tightening seat. A positioning block is provided in front of the tightening guide posts, and a bolt B is provided on the side facade of the tightening seat. The bolt B passes through the middle hole of the positioning block and is connected to a washer. A pressure plate A is provided above the positioning block. The rear end of the pressure plate A is connected to the side facade of the tightening seat by a support bolt. The front end of the pressure plate A is open, and a long bolt is provided in the opening. The long bolt is fixed downward to the tightening seat. A support is provided on the tightening seat. The base A has two support columns B of equal height. The top seat on the front side of the base A has a tension column A, and the tension column A has a tension column B. The tension column B has a bolt C. The upper positioning block of the top seat has pressure plates B symmetrically arranged on both sides. The pressure plates B are L-shaped. The outer side of the vertical plate of the pressure plate B has an opening plate. The bolt C is movably connected to the opening plate. The horizontal plates of the two pressure plates B are connected to the top seat by locking bolts. The pressure plates B can be rotated back and forth around the locking bolts.

[0006] Preferably, the intermediate support device includes a support base B, on which a short support column C and a long support column C are provided, and a movable support column cap is installed above both the short support column C and the long support column C.

[0007] Preferably, a pressing device is provided on the bottom plate next to the support base. The pressing device includes a support column A, a movable support column A, and two pressing columns on the bottom plate. The movable support column A is provided with a movable cap. The pressing column is provided with a pressing block. The pressing block is provided with a spring B. The pressing rod is provided below the front end of the pressing block.

[0008] The beneficial effects of this invention are: low manufacturing cost, automatic centering and determination, especially for products with limited clamping positions, reasonable allocation of clamping positions, quick and efficient clamping, reliable clamping method, small workpiece deformation, effective control of vibration during processing, which can greatly reduce the labor intensity of workers, reduce the scrap rate of products, and further reduce costs. Attached Figure Description

[0009] Figure 1 This is a top view of the present invention;

[0010] Figure 2 For the present invention Figure 1 A schematic diagram of the CC cross-section;

[0011] Figure 3 For the present invention Figure 1 DD cross-sectional schematic diagram;

[0012] Figure 4 For the present invention Figure 1 EE cross-sectional schematic diagram;

[0013] Figure 5 For the present invention Figure 1 A schematic diagram of the FF cross-section;

[0014] Figure 6 This is an overall schematic diagram of the isometric direction of the present invention;

[0015] Figure 7 This is another overall schematic diagram of the isometric direction of the present invention;

[0016] Figure 8 This is a schematic diagram of the product processed according to the present invention.

[0017] Parts Description: 1. Base plate, 2. Support base, 3. Positioning wedge, 4. Limit screw, 5. Spring A, 6. Guide positioning post, 7. Product, 8. Support post A, 9. Tightening seat, 10. Positioning block, 11. Tightening guide post, 12. Support base A, 13. Support post B, 14. Support base B, 15. Bolt A, 16. Bolt B, 17. Washer, 18. Movable support post A, 19. Movable cap of support post, 20. Long support post C, 21. Movable cap of support post, 22. Short support post C, 23. Pressure rod, 24. Pressure post, 25. Pressure block, 26. Spring B, 27. Pressure plate A, 28. Support bolt, 29. Long bolt, 30. Pressure plate B, 31. Locking bolt, 32. Tensioning post A, 33. Tensioning post B, 34. Bolt C, 35. Opening plate. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] See attached document Figure 1-8A multi-station self-centering machining fixture for irregular products includes a base 1, on which a support seat 2, a clamping device, a top clamping seat 9, and a support base B14 are provided. The support seat 2 is provided with a positioning device, the top clamping seat 9 is provided with a clamping device, and the support base B14 is provided with an intermediate support device. The positioning device includes a positioning wedge 3 located in the side facade of the support seat 2. The positioning wedge 3 is provided with two guide positioning posts 6. The positioning wedge 3 is fixedly connected to the side facade of the support seat 2 by bolts A15. A spring A5 is provided in the middle hole of the positioning wedge 3. The spring A5 is connected to a limiting screw 4 on the side facade of the support seat 2.

[0021] The tightening device includes two tightening guide posts 11, which are located on the inner side of the side facade of the tightening seat 9. A positioning block 10 is provided in front of the tightening guide post 11. A bolt B16 is provided on the side facade of the tightening seat 9. The bolt B16 passes through the middle hole of the positioning block 10 and is connected to the washer 17. A pressure plate A27 is provided above the positioning block 10. The rear end of the pressure plate A27 is connected to the side facade of the tightening seat 9 by a support bolt 28. The front end of the pressure plate A27 is open, and a long bolt 29 is provided in the opening. The long bolt 29 is fixed downward to the tightening seat 9. A support base A12 is provided on the tightening seat 9. The support base A12 is provided with two support columns B13 of equal height. The top seat 9 on the front side of the support base A12 is provided with a tension column A32. The tension column A32 is provided with a tension column B33. The tension column B33 is provided with a bolt C34. The positioning block 10 at the upper end of the top seat 9 is provided with pressure plates B30 symmetrically on both sides. The pressure plates B30 are L-shaped. The outer side of the vertical plate of the pressure plate B30 is provided with an opening plate 35. The bolt C34 is movably connected to the opening plate 35. The horizontal plates of the two pressure plates B are connected to the top seat 9 through locking bolts 31. The pressure plates B30 can be rotated back and forth around the locking bolts 31.

[0022] The intermediate support device includes a support base B14, on which a short support column C22 and a long support column C20 are provided, and a support column movable cap 21 is installed above both the short support column C22 and the long support column C20.

[0023] A pressing device is provided on the base plate 1 next to the support seat 2. The pressing device includes a support column A8, a movable support column A18, and two pressing columns 24 on the base plate 1. The movable support column A18 is provided with a movable cap 19. The pressing column 24 is provided with a pressing block 25. The pressing block 25 is provided with a spring B26. The pressing block 25 is provided with a movable pressing rod 23 below the front end of the pressing block 25.

[0024] First, place the base plate 1 on the platform. The support seat 2 and the top seat 9 are connected and fixed to the base plate 1 respectively. Then, fix the two guide positioning columns 6 to the support seat 2 using their own threads.

[0025] Install spring A5 into the middle hole of positioning wedge 3, use guide positioning pin 6 to install positioning wedge 3, and then use limit screw 4 to lock it, control the forward and backward travel of positioning wedge 3 and prevent it from falling off.

[0026] Connect the top-tightening guide post 11 to the top-tightening seat 9 using its own thread, install the positioning block 10 through the top-tightening guide post 11, screw the bolt B16 into the top-tightening seat 9, pass it through the middle hole of the positioning block 10, and use the washer 17 to fasten it, so that the bolt B16 can be used to control the positioning block 10 to move back and forth.

[0027] Install the support base A12 onto the top clamping seat 9, and install two support columns B13 of equal height onto the support base A12 as product support points; after assembling and connecting the tension column A32, tension column B33, and bolt 34, tighten them onto the top clamping seat 9 with screws.

[0028] Use locking bolts 31 to symmetrically fix the two pressure plates B30 to the top clamping seat 9;

[0029] Install the support base B14 onto the base plate 1 through the holes, then install the long support column C20 and the short support column C22 onto the support base B14, and then install the movable caps 21 of the two support columns C onto the long support column C20 and the short support column C22 respectively.

[0030] Install the support column A8, the movable support column A18 and the two clamping columns 24 onto the base plate 1 respectively. Install the movable cap 19 onto the movable support column A18. Put the spring B26 on the two clamping blocks 25 and install them onto the clamping columns 24 respectively.

[0031] Use the built-in holes on the base plate 1 to press and connect it to the equipment workbench.

[0032] During installation, place the bottom surface of product 7 on two support columns B13 on one side and on support column A8 on the other side, defining the plane at these three points. Simultaneously, one side of product 7 faces the positioning wedge 3, using its taper to center itself. Spring A5 provides a clamping force to assist in centering. The product's end face is clamped until it stops at the guide positioning column 6, and the zero point in the length direction is simultaneously confirmed. Tighten bolt B16, causing the positioning block 10 to move on the clamping guide column 11, using its two sides' slopes to automatically center the outer side of the other side of the product, simultaneously clamping it.

[0033] After the workpiece is installed, rotate the movable cap 19 of the support column A18 upwards and tighten it to support the bottom surface. Tighten the long bolt 29 so that the pressure plate A27 presses the middle position of the product. Use the pressure rod 23 to pass through the product hole and lock the pressure block 25, pressing it onto the pressure rod 23, thereby pressing the product 7. The two symmetrical pressure plates B30 are temporarily flipped to the outer non-interference position.

[0034] After product 7 is pressed, rotate the movable caps 21 of the two middle support columns C upward to assist in supporting the product and prevent product vibration caused by the large cutter during processing. At the same time, tighten the bolts A15 on the positioning wedge 3 with slight force to ensure the stability of the tooling centering function during processing.

[0035] After all the above is completed, process the product plane (dovetail groove in the middle is not processed). After the plane is processed, loosen the pressure plate A27 and take it off using its quick-change opening. Then flip the two symmetrical pressure plates B30 back and press them onto the plane that was just processed. Lock them with bolts C34 on both sides respectively, and continue processing the dovetail groove in the middle position.

[0036] After processing, loosen the two bolts C34 and the clamping block 25 (without completely removing the nut), and the workpiece can be quickly removed.

[0037] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope of the present invention, based on the technical solution and inventive concept of the present invention, are covered within the scope of protection of the present invention.

Claims

1. A multi-station self-centering machining fixture for irregular products, including a base (1), characterized in that... The base (1) is provided with a support seat (2), a clamping device, a top clamping seat (9), and a support base B (14). The support seat (2) is provided with a positioning device, the top clamping seat (9) is provided with a clamping device, and the support base B (14) is provided with an intermediate support device. The positioning device includes a positioning wedge (3) located in the side facade of the support seat (2). The positioning wedge (3) is provided with two guide positioning posts (6). The positioning wedge (3) is fixedly connected to the side facade of the support seat (2) by bolts A (15). A spring A (5) is provided in the middle hole of the positioning wedge (3). The spring A (5) is connected to the limiting screw (4) on the side facade of the support seat (2). The clamping device includes two A top-tightening guide post (11) is located on the inner side of the top-tightening seat (9). A positioning block (10) is provided in front of the top-tightening guide post (11). A bolt B (16) is provided on the side of the top-tightening seat (9). The bolt B (16) passes through the middle hole of the positioning block (10) and is connected to the gasket (17). A pressure plate A (27) is provided above the positioning block (10). The rear end of the pressure plate A (27) is connected to the side of the top-tightening seat (9) by a support bolt (28). The front end of the pressure plate A (27) is open. A long bolt (29) is provided in the opening. The long bolt (29) is fixed downward on the top-tightening seat (9). A support base A (12) is provided on the top-tightening seat (9). A (12) is provided with two support columns B (13) of equal height. The top seat (9) on the front side of the support base A (12) is provided with a tension column A (32). The tension column A (32) is provided with a tension column B (33). The tension column B (33) is provided with a bolt C (34). The positioning block (10) at the upper end of the top seat (9) is provided with pressure plates B (30) symmetrically on both sides. The pressure plates B (30) are L-shaped. The outer side of the vertical plate of the pressure plate B (30) is provided with an opening plate (35). The bolt C (34) is movably connected to the opening plate (35). The horizontal plates of the two pressure plates B are connected to the top seat (9) by locking bolts (31). The pressure plates B (30) can be rotated back and forth around the locking bolts (31). The intermediate support device includes a support base B (14), on which a short support column C (22) and a long support column C (20) are provided. A movable cap (21) of the support column is installed above both the short support column C (22) and the long support column C (20). A pressing device is provided on the bottom plate (1) on the side of the support base (2). The pressing device includes a support column A (8), a movable support column A (18), and two pressing columns (24) on the bottom plate (1). A movable cap (19) is provided on the movable support column A (18). A pressing block (25) is provided on the pressing column (24). A spring B (26) is provided on the pressing block (25). A pressing rod (23) is provided below the front end of the pressing block (25).

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