Cambered surface part positioning clamp

Abstract

The utility model relates to a cambered surface part positioning clamp, and belongs to the field of clamps, the cambered surface part positioning clamp comprises a table top, a positioning mechanism is arranged on the front face of the table top, fixing mechanisms are arranged on the front face of the table top and located on the left side and the right side of the positioning mechanism, and each positioning mechanism comprises a positioning disc, an expansion block, a conical block, a fixing frame and an air cylinder. According to the cambered surface part positioning clamp, the positioning mechanism can adapt to parts of different sizes through the positioning hole and the movable conical block, accurate preliminary positioning is achieved, the expansion block is composed of the multiple positioning iron blocks and the multiple rubber splicing blocks, the expansion block can be tightly attached to the cambered surface of the part, dynamic adjustment can be conducted through driving of the air cylinder, and the positioning efficiency is improved. The positioning mechanism is designed to adapt to cambered surface parts in different shapes, the positioning flexibility and accuracy are remarkably improved, errors caused by inaccurate positioning in the machining process are reduced, the machining quality is improved accordingly, in addition, the design of the positioning mechanism also considers the operation convenience, and an operator can rapidly adjust and position the parts.

Description

Technical Field

[0001] This application relates to the technical field of jigs, and specifically relates to a positioning jig for arc-shaped parts. Background Art

[0002] A part positioning jig is a tool used in machining, assembly, or other industrial production processes. It is used to ensure that parts maintain the correct position and orientation during machining or assembly. The design and use of such jigs are crucial for improving production efficiency, ensuring machining accuracy, and product quality.

[0003] For example, a jig for machining the arc surface of small parts disclosed in Chinese Patent Publication No. (CN208304520U). It includes: a chassis, a guide disk, multiple parts, a positioning component, and a pressing component. The lathe tool of the lathe is coaxial with the guide disk, and the lathe tool processes the arc surfaces to be machined of multiple parts along the axial direction of the guide disk. The jig for machining the arc surface of small parts provided by this utility model can process the arc surfaces of multiple parts at one time by clamping multiple parts on the jig, improving the machining efficiency of the arc surfaces of small parts; at the same time, since the tool of the lathe extends out shorter, the phenomenon of chatter marks during machining is avoided, and the machining quality of the arc surfaces of small parts is improved.

[0004] However, in the prior art exemplified by the above-mentioned disclosed patent, there is still a problem of poor positioning and clamping effect for arc-shaped parts. During the forming process of parts, they need to go through rough machining processes such as blank casting first, and then finish machining processes such as drilling, grooving, and grinding. During the finish machining process of parts, how to position and machine the parts is a problem that workers must face. For parts with arc-shaped outer edges, using traditional part clamping and positioning methods cannot position the parts well, which will cause movement during machining and affect the machining quality. Summary of the Utility Model

[0005] Aiming at the deficiencies of the prior art, this application provides a positioning jig for arc-shaped parts, which has advantages such as being convenient for positioning and clamping arc-shaped parts, and solves the problem of poor positioning and clamping effect for arc-shaped parts.

[0006] To achieve the above object, this application provides the following technical solution: A positioning jig for arc-shaped parts, including a tabletop, a positioning mechanism is provided on the front surface of the tabletop, and fixing mechanisms are provided on the left and right sides of the positioning mechanism on the front surface of the tabletop;

[0007] The positioning mechanism includes a positioning disk, an expansion block, a conical block, a fixing frame and a cylinder. The positioning disk is fixed to the front of the tabletop. A positioning hole is formed in the front of the positioning disk, and the conical block is slidably connected to the inner wall of the positioning hole. The expansion block is sleeved outside the conical block. The fixing frame is fixed to the back of the tabletop. The cylinder is fixed to the back of the fixing frame, and the outside of the output shaft of the cylinder is fixed to the conical block.

[0008] By adopting this technical solution, precise positioning of parts can be achieved. The design of the expansion block allows it to closely fit the arc shape of the part, while the sliding connection of the conical block provides the necessary adjustment space to adapt to parts of different sizes. In addition, the drive of the cylinder enables the entire positioning process to be completed quickly and accurately, improving the positioning efficiency and machining accuracy.

[0009] Furthermore, the expansion block includes a number of positioning iron blocks and a plurality of rubber splicing blocks fixed between adjacent two positioning iron blocks.

[0010] By adopting this technical solution, by combining the positioning iron blocks and the rubber splicing blocks, not only the positioning ability of the expansion block is enhanced, but also a certain elasticity is provided to adapt to the minor shape changes of the parts, making the fixture more stable during positioning, reducing the positioning error caused by the irregular shape of the parts, and at the same time improving the service life and reliability of the fixture.

[0011] Furthermore, the shape of the positioning iron block is arc-shaped, and a limiting disk is fixed to the top of the conical block.

[0012] By adopting this technical solution, through the arc-shaped design of the positioning iron block and the limiting disk at the top of the conical block, the positioning accuracy and stability of the fixture are enhanced. The arc-shaped design enables the positioning iron block to better match the arc surface of the part, while the limiting disk ensures the precise control of the conical block during movement, avoiding problems such as excessive movement or inaccurate positioning.

[0013] Furthermore, a number of cushion blocks are fixed to the front of the positioning disk, and the number of cushion blocks are annularly distributed on the front of the positioning disk.

[0014] By adopting this technical solution, additional support and positioning points are provided, which not only enhance the stability of the part during the machining process, but also help to disperse the machining force and reduce the deformation of the part caused by uneven stress.

[0015] Furthermore, the fixing mechanism includes two connecting blocks, two rotating frames, two rotating shafts, two connecting rods, two pressing blocks, two electric push rods and a side positioning member. The two connecting blocks are respectively fixed on the front surface of the tabletop and on the left and right sides of the positioning disk. The two rotating frames are respectively fixed to the front surfaces of the two connecting blocks. The two rotating shafts are respectively fixed between the upper and lower inner walls of the two rotating frames. The two connecting rods are respectively rotatably connected to the outer sides of the two rotating shafts. The two pressing blocks are respectively fixed to the opposite sides of the two connecting rods. Connecting cavities are respectively formed inside the two connecting blocks, and the two electric push rods are respectively fixed to the inner walls of the two connecting cavities. The outer sides of the output shafts of the two electric push rods are respectively rotatably connected to the two connecting rods. The side positioning member is arranged on the front surface of the tabletop to perform side positioning on the arc-shaped part.

[0016] By adopting this technical solution, the fixture can achieve comprehensive fixation of the part, ensuring that the part will not displace or rotate during the processing, thus guaranteeing the processing accuracy and quality.

[0017] Furthermore, the side positioning member includes a fixed table fixed on the front surface of the tabletop. A support spring is fixed to the left inner wall of the fixed table. The right end of the support spring is fixed to a side positioning block. A pull rod is fixed to the left side of the side positioning block, and the pull rod is located inside the support spring.

[0018] By adopting this technical solution, it not only provides stable side support, but also allows the operator to adjust the position of the positioning block according to needs to adapt to parts of different shapes.

[0019] Furthermore, a connection port for the side positioning block to slide is formed on the right side of the fixed table. The left end of the pull rod penetrates and extends to the outside of the fixed table and is fixed with a handle.

[0020] By adopting this technical solution, the operator can easily adjust the position of the positioning block to adapt to parts of different sizes and shapes, improving the flexibility and applicability of the fixture.

[0021] Furthermore, buffer pads are respectively fixed to the bottom ends of the two pressing blocks.

[0022] By adopting this technical solution, the impact and damage that may be caused to the part during the pressing process are reduced. This design not only protects the surface quality of the part, but also reduces the noise and vibration during the processing, improving the comfort of the processing environment.

[0023] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0024] 1. For this arc-shaped part positioning fixture, the positioning mechanism can adapt to parts of different sizes and achieve precise preliminary positioning by using the positioning holes on the positioning disk and the movable cone blocks. The expansion block is composed of multiple positioning iron blocks and rubber splicing blocks. It can not only closely fit the arc surface of the part, but also be dynamically adjusted by the drive of the cylinder to adapt to arc-shaped parts of different shapes, significantly improving the flexibility and accuracy of positioning, reducing the errors caused by inaccurate positioning during the processing, thus improving the processing quality. In addition, the design of the positioning mechanism also considers the convenience of operation, enabling the operator to quickly adjust and position the part.

[0025] 2. For this arc-shaped part positioning fixture, the fixing mechanism can provide stable and precise pressure through the coordinated use of the electric push rod and the connecting rod, ensuring that the part will not displace or rotate during the processing. The design of the pressing block enables the fixture to apply pressure evenly, avoiding part deformation or damage caused by uneven pressure. The introduction of the side positioning piece further enhances the lateral stability of the part. The use of the electric push rod makes the opening and closing of the fixture faster and more convenient, greatly shortening the loading and unloading time of the part and improving the production efficiency. It not only improves the accuracy and quality of part processing, but also enhances the convenience of operation and the automation level of production through its intelligent and user-friendly design. Brief Description of the Drawings

[0026] Figure 1 It is a schematic structural diagram of this application;

[0027] Figure 2 It is a schematic diagram of the positioning mechanism of this application;

[0028] Figure 3 It is a schematic diagram of the expansion block of this application;

[0029] Figure 4 It is a schematic diagram of the fixing mechanism of this application.

[0030] In the figure: 1, tabletop; 2, positioning mechanism; 21, positioning disk; 22, expansion block; 2201, positioning iron block; 2202, rubber splicing block; 23, cone block; 24, fixing frame; 25, cylinder; 26, positioning hole; 27, cushion block; 3, fixing mechanism; 31, connecting block; 32, rotating frame; 33, rotating shaft; 34, connecting rod; 35, pressing block; 36, electric push rod; 37, side positioning piece; 371, fixing table; 372, support spring; 373, side positioning block; 374, pull rod. Detailed Description of the Invention

[0031] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0032] Please refer to Figure 1 , a positioning fixture for an arc-shaped part in this embodiment includes a table 1. A positioning mechanism 2 is provided on the front surface of the table 1, and fixing mechanisms 3 are provided on the left and right sides of the positioning mechanism 2 on the front surface of the table 1.

[0033] Please refer to Figures 2 to 3 , in order to facilitate the rapid positioning of arc-shaped parts, the positioning mechanism 2 in this embodiment includes a positioning disk 21, an expansion block 22, a tapered block 23, a fixing frame 24, and a cylinder 25. The positioning disk 21 is fixed to the front surface of the table 1. A positioning hole 26 is provided on the front surface of the positioning disk 21, and the tapered block 23 is slidably connected to the inner wall of the positioning hole 26. The expansion block 22 is sleeved on the outside of the tapered block 23. Take out the arc-shaped part to be processed and sleeved the inner hole of the part on the outside of the expansion block 22 for preliminary positioning. The fixing frame 24 is fixed to the back surface of the table 1, the cylinder 25 is fixed to the back surface of the fixing frame 24, and the outside of the output shaft of the cylinder 25 is fixed to the tapered block 23.

[0034] In this embodiment, the expansion block 22 includes a plurality of positioning iron blocks 2201 and a plurality of rubber splicing blocks 2202 fixed between adjacent two positioning iron blocks 2201. The shape of the positioning iron blocks 2201 is arc-shaped. Driven by the cylinder 25, the tapered block 23 moves in the positioning hole 26, pushing the expansion block 22 to expand outwards, so that the positioning iron blocks 2201 match the arc surface shape of the part and fit tightly, realizing precise positioning. A limit disk is fixed to the top end of the tapered block 23, and a plurality of cushion blocks 27 are fixed to the front surface of the positioning disk 21, and the plurality of cushion blocks 27 are annularly distributed on the front surface of the positioning disk 21. After the expansion block 22 fits with the arc surface of the part, keep the driving state of the cylinder 25 to maintain the positioning state of the part and prevent it from moving during the processing.

[0035] Among them, the positioning mechanism 2 can adapt to parts of different sizes by using the positioning hole 26 on the positioning disk 21 and the movable tapered block 23 to achieve precise preliminary positioning. The expansion block 22 is composed of a plurality of positioning iron blocks 2201 and rubber splicing blocks 2202. It can not only fit tightly with the arc surface of the part, but also be dynamically adjusted by the drive of the cylinder 25 to adapt to arc-shaped parts of different shapes, significantly improving the flexibility and accuracy of positioning, reducing the errors caused by inaccurate positioning during the processing, and thus improving the processing quality.

[0036] It should be noted that when the conical block 23 moves, it can push the outer expansion block 22 to move, which is convenient for tightly pressing the part from the inside. When the part is used, it is first placed on the central expansion block 22 for preliminary positioning, and then a groove of the part is positioned through the lateral positioning block. Then, the part is pressed and fixed by the pressing heads on both sides and positioned by the internal expansion block 22, thus completing the positioning of the entire part.

[0037] Please refer to Figure 4 , in order to press and fix the positioned part, the fixing mechanism 3 in this embodiment includes two connecting blocks 31, two rotating frames 32, two rotating shafts 33, two connecting rods 34, two pressing blocks 35, two electric push rods 36 and a side positioning member 37. The two connecting blocks 31 are respectively fixed on the front surface of the table 1 and on the left and right sides of the positioning disk 21. The two rotating frames 32 are respectively fixed to the front surfaces of the two connecting blocks 31. The two rotating shafts 33 are respectively fixed between the upper and lower inner walls of the two rotating frames 32. The two connecting rods 34 are respectively rotatably connected to the outer sides of the two rotating shafts 33. The two pressing blocks 35 are respectively fixed to the opposite sides of the two connecting rods 34. Connecting cavities are respectively opened inside the two connecting blocks 31, and the two electric push rods 36 are respectively fixed to the inner walls of the two connecting cavities. According to the specific position and shape of the part, the rotating frames 32 and rotating shafts 33 in the fixing mechanism 3 are adjusted to ensure that the pressing blocks 35 can correctly align with the side surface of the part. The outer sides of the output shafts of the two electric push rods 36 are respectively rotatably connected to the two connecting rods 34. Driven by the electric push rods 36, the connecting rods 34 drive the pressing blocks 35 to move towards the part to realize the preliminary fixation of the part. The side positioning member 37 is arranged on the front surface of the table 1 to perform side positioning on the arc-shaped part.

[0038] The side positioning member 37 includes a fixed table 371 fixed to the front surface of the table 1. A support spring 372 is fixed to the left inner wall of the fixed table 371. The side positioning member 37 performs side positioning on the part to ensure that the part does not move laterally during the processing. A side positioning block 373 is fixed to the right end of the support spring 372. A pull rod 374 is fixed to the left side of the side positioning block 373, and the pull rod 374 is located inside the support spring 372. Continuing to be driven by the electric push rod 36, the pressing block 35 is further pressed to firmly fix the part on the table 1 and prepare for processing.

[0039] In this embodiment, a connection port for the side positioning block 373 to slide is opened on the right side of the fixed table 371. The left end of the pull rod 374 penetrates and extends to the outside of the fixed table 371 and is fixed with a handle. Buffer pads are fixed to the bottom ends of the two pressing blocks 35. After the part is positioned and fixed, fine processing processes such as drilling, grooving, and grinding can be started. After the processing is completed, the pressing blocks 35 are separated from the part by the reverse drive of the electric push rod 36 to release the part and complete the processing flow.

[0040] It should be noted that the standard parts used in this application document can all be purchased from the market, and can also be customized according to the descriptions in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art. The control method is automatically controlled by a controller, and the control circuit of the controller can be realized by simple programming by those skilled in the art, which belongs to the common general knowledge in this field. Therefore, the control method and circuit connection will not be explained in detail in this application document.

[0041] The working principle of the above embodiment is as follows:

[0042] (1) Take out the arc-shaped part to be processed and sleeved the inner hole of the part on the outside of the expansion block 22 for preliminary positioning. Driven by the air cylinder 25, the tapered block 23 moves in the positioning hole 26, pushing the expansion block 22 to expand outwards, so that the positioning iron block 2201 matches the arc shape of the part and fits tightly, realizing precise positioning. After the expansion block 22 fits with the arc surface of the part, maintain the driving state of the air cylinder 25 to maintain the positioning state of the part and prevent it from moving during the processing.

[0043] (2) According to the specific position and shape of the part, adjust the rotating frame 32 and the rotating shaft 33 in the fixing mechanism 3 to ensure that the pressing block 35 can correctly align with the side surface of the part. Driven by the electric push rod 36, the connecting rod 34 drives the pressing block 35 to move towards the part to realize the preliminary fixing of the part. At the same time, the side positioning member 37 positions the side surface of the part to ensure that the part will not move laterally during the processing. Continue to drive by the electric push rod 36 to further press the pressing block 35, so that the part is firmly fixed on the table 1 and ready for processing. After the part is positioned and fixed, the finishing processes such as drilling, grooving, and grinding can be started. After the processing is completed, drive the electric push rod 36 in the reverse direction to make the pressing block 35 leave the part and release the part to complete the processing flow.

Claims

1. An arc surface part positioning fixture, comprising a tabletop (1), characterized in that: The front of the tabletop (1) is provided with a positioning mechanism (2), and fixing mechanisms (3) are arranged on the front of the tabletop (1) and on the left and right sides of the positioning mechanism (2); The positioning mechanism (2) includes a positioning disc (21), an expansion block (22), a tapered block (23), a fixing frame (24) and a cylinder (25). The positioning disc (21) is fixed to the front of the tabletop (1). A positioning hole (26) is formed in the front of the positioning disc (21), and the tapered block (23) is slidably connected to the inner wall of the positioning hole (26). The expansion block (22) is sleeved on the outside of the tapered block (23). The fixing frame (24) is fixed to the back of the tabletop (1), the cylinder (25) is fixed to the back of the fixing frame (24), and the outside of the output shaft of the cylinder (25) is fixed to the tapered block (23).

2. The positioning fixture for an arcuate surface part according to claim 1, wherein: The expansion block (22) includes a number of positioning iron blocks (2201) and a plurality of rubber splicing blocks (2202) fixed between adjacent two positioning iron blocks (2201).

3. The positioning fixture for an arc-shaped part according to claim 2, wherein: The shape of the positioning iron block (2201) is arc-shaped, and a limiting disc is fixed to the top end of the tapered block (23).

4. The positioning fixture for an arc-shaped part according to claim 1, characterized in that: A number of cushion blocks (27) are fixed to the front of the positioning disc (21), and the number of cushion blocks (27) are annularly distributed on the front of the positioning disc (21).

5. The positioning fixture for an arc surface part according to claim 1, characterized in that: The fixing mechanism (3) includes two connecting blocks (31), two rotating frames (32), two rotating shafts (33), two connecting rods (34), two pressing blocks (35), two electric push rods (36) and a side positioning member (37). The two connecting blocks (31) are respectively fixed to the front of the tabletop (1) and on the left and right sides of the positioning disc (21). The two rotating frames (32) are respectively fixed to the fronts of the two connecting blocks (31). The two rotating shafts (33) are respectively fixed between the upper and lower inner walls of the two rotating frames (32). The two connecting rods (34) are respectively rotatably connected to the outside of the two rotating shafts (33). The two pressing blocks (35) are respectively fixed to the opposite sides of the two connecting rods (34). Connecting cavities are formed in the two connecting blocks (31), and the two electric push rods (36) are respectively fixed to the inner walls of the two connecting cavities. The outside of the output shafts of the two electric push rods (36) are respectively rotatably connected to the two connecting rods (34). The side positioning member (37) is arranged on the front of the tabletop (1) to perform side positioning on the arc-shaped part.

6. The positioning fixture for an arcuate surface part according to claim 5, wherein: The side positioning member (37) includes a fixed platform (371) fixed to the front of the tabletop (1). A support spring (372) is fixed to the left inner wall of the fixed platform (371). The right end of the support spring (372) is fixed to a side positioning block (373). A pull rod (374) is fixed to the left side of the side positioning block (373), and the pull rod (374) is located inside the support spring (372).

7. The positioning fixture for an arc surface part according to claim 6, wherein: A connection port for the side positioning block (373) to slide is formed on the right side of the fixed platform (371). The left end of the pull rod (374) penetrates and extends to the outside of the fixed platform (371) and is fixed with a handle.

8. The positioning fixture for an arcuate surface part according to claim 5, characterized in that: Buffer pads are fixed to the bottom ends of the two pressing blocks (35).

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