A fixture for machining connectors

Abstract

This application provides a fixture for machining connectors, which includes a bottom positioning block and side positioning blocks. The workpiece to be machined is first placed on the bottom positioning block, and then its side wall abuts against the side positioning block for positioning. Then, a clamping block presses down on the upper end face of the workpiece from top to bottom to achieve vertical clamping. Finally, a clamping lever clamps the side wall of the workpiece to achieve horizontal clamping, ensuring that the workpiece can be stably clamped and positioned during machining. Contour surfaces are provided on the bottom positioning block and the clamping block to ensure that the workpiece is evenly stressed when clamped, avoiding damage to the workpiece and preventing machining deformation. The side positioning blocks and the side clamping structure are set on both sides of one of the through holes to be machined. The through hole is machined by setting a first guide hole and a second guide hole, ensuring the stability of the workpiece during machining and improving machining accuracy.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology, specifically a fixture for processing connectors. Background Technology

[0002] like Figure 1 As shown, the workpiece to be processed is a connector used in engineering machinery, and the connector requires high machining precision. The connector includes a body a1 with two protruding ends a2. After the body is formed, two through holes are machined on the two protruding ends a1 using a vertical machining center: a first through hole a3 and a second through hole a3'. The two first through holes a3 and the two second through holes a3' are coaxial. In the prior art, the workpiece is fixed by a manual clamp before machining. However, because the workpiece is a non-standard part and has multiple curved surfaces, the existing manual clamping method relies heavily on the operator's skill level for clamping effectiveness. During manual clamping, uneven force can easily be applied to the workpiece, leading to machining deformation or even damage, thus affecting the workpiece yield. Summary of the Invention

[0003] To address the problem that manual clamping in existing manual clamping methods can easily lead to uneven workpiece loading and thus affect the workpiece yield, this utility model provides a fixture for processing connectors, which can ensure that the workpiece surface is uniformly stressed and achieve accurate positioning and clamping of the workpiece.

[0004] The structure of this utility model is as follows: a fixture for processing connectors, characterized in that it includes: a base, a positioning structure and a clamping structure, wherein the positioning structure and the clamping structure are mounted on the base; The positioning structure includes: a bottom positioning block and a side positioning block; The top surface of the bottom positioning block is provided with a contour surface that matches the shape of the workpiece to be processed; The side positioning block is disposed on one side of the bottom positioning block, located on the side of a through hole to be processed in the workpiece; the side positioning block is provided with a first guide hole coaxial with the through hole to be processed; The clamping structure includes: a side clamping structure and a pressing structure; The clamping structure includes a clamping block and a clamping drive structure. The clamping block is Y-shaped, with two branches at the head corresponding to the two protruding ends of the workpiece to be processed. The bottom surface of the clamping block is provided with a contoured surface that matches the shape of the workpiece to be processed. The clamping block clamps the workpiece above the workpiece based on the clamping drive structure. The side clamping structure is located on the other side of the bottom positioning block; The side clamping structure includes: a mounting base, a side rotating shaft, an L-shaped clamping lever, and a clamping drive structure; The mounting base is disposed above the base; The side-mounted rotating shaft is horizontally positioned on the mounting base in a direction perpendicular to the axis of the through hole to be machined on the workpiece; the bent portion of the horizontal and vertical plates of the clamping lever is movably fitted onto the side-mounted rotating shaft; a clamping head is provided at the top of the L-shaped vertical plate of the clamping lever, facing the workpiece; a second guide hole is provided on the clamping head, the second guide hole being coaxial with the through hole to be machined on the workpiece; the horizontal plate of the clamping lever is positioned away from the workpiece. The clamping drive structure is located below the end of the clamping lever horizontal plate and achieves linear movement in the vertical direction.

[0005] Its further features are: The bottom positioning block has two contoured surfaces, which correspond to the two protruding ends of the workpiece to be processed. The bottom positioning block has a contoured surface that is inclined with one end higher than the other. The lower end is provided with a semi-circular groove, the shape of which is adapted to the end shape of the protruding end of the workpiece to be processed. The side positioning block and the clamping lever are located on both sides of the through hole to be processed at the higher end. The clamping drive structure is based on a lever-type hydraulic cylinder; A connecting flange is provided on one side of the base; The base is provided with N sets of positioning structures and clamping structures, where N is a natural number greater than or equal to 1.

[0006] This application provides a fixture for machining connectors, which includes a bottom positioning block and side positioning blocks. The workpiece to be machined is first placed on the bottom positioning block, and then its side wall abuts against the side positioning block for positioning. Then, a clamping block presses down on the upper end face of the workpiece from top to bottom to achieve vertical clamping. Finally, a clamping lever clamps the side wall of the workpiece to achieve horizontal clamping, ensuring that the workpiece can be stably clamped and positioned during machining. Contour surfaces are provided on the bottom positioning block and the clamping block to ensure that the workpiece is evenly stressed when clamped, avoiding damage to the workpiece and preventing machining deformation. The side positioning blocks and the side clamping structure are set on both sides of one of the through holes to be machined. The through hole is machined by setting a first guide hole and a second guide hole, ensuring the stability of the workpiece during machining and improving machining accuracy. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of the workpiece to be processed; Figure 2 This is a schematic diagram of the overall structure of the fixture for machining the connectors in this application; Figure 3A front view structural diagram of the positioning and clamping structures; Figure 4 A three-dimensional structural diagram of the positioning and clamping structures; Figure 5 This is a schematic diagram of the tensioning lever. Detailed Implementation

[0008] like Figures 2-5 As shown, this application includes a fixture for processing connectors, comprising: a base 1, a positioning structure, and a clamping structure, the positioning structure and the clamping structure being mounted on the base 1. The base 1 includes two vertical plates 102 and one horizontal plate 101, the two vertical plates 102 and the horizontal plate 101 forming an H-shaped structure. The positioning structure and the clamping structure are mounted on the horizontal plate 101. A connecting flange 6 is provided on one side of the base 1, through which the fixture of this application is mounted on a processing equipment (not marked in the figure).

[0009] The positioning structure includes: a bottom positioning block 2 and a side positioning block 3. The clamping structure includes: a side clamping structure 4 and a pressing structure 5.

[0010] The top surface of the bottom positioning block 2 is provided with a contoured surface that matches the shape of the workpiece to be processed. The clamping structure 5 includes a clamping block 51 and a clamping drive structure 52. The clamping block 51 is Y-shaped, with two branches at the head corresponding to the two protruding ends a2 of the workpiece to be processed. The bottom surface of the clamping block 51 is provided with a contoured surface that matches the shape of the workpiece to be processed. The clamping block 51 clamps the workpiece above the workpiece based on the clamping drive structure 52.

[0011] The contouring surface of the bottom positioning block 2 can be adapted to the overall shape of the bottom end face of the workpiece to be processed, or it can be adapted only to the shape of the part to be processed. Since the processing part is set on the two protruding ends a2 of the workpiece to be processed, in order to reduce the overall complexity of the fixture, in this embodiment, the contouring surface of the bottom positioning block 2 is set to two, which correspond to the two protruding ends a2 of the workpiece to be processed respectively.

[0012] like Figure 2 , 3As shown in Figure 4, the contoured surface of the bottom positioning block 2 is an inclined contoured surface with one end higher than the other. A semi-circular groove 21 is provided at the lower end, the shape of which is adapted to the end shape of the protruding end of the workpiece to be processed. Side positioning blocks 3 and clamping levers 41 are located on both sides of the through-hole to be processed at the higher end. By setting the inclined contoured surface and the groove 21 at the lower end, when the workpiece to be processed is placed on the upper surface of the bottom positioning block 2, the two protruding ends a2 are aligned and placed on one contoured surface, while the end of the protruding end a1 is placed in the groove 21, enabling rapid positioning of the workpiece. Simultaneously, the contoured surface at the bottom of the clamping block 51 is set to adapt to the shape of the upper surface of the protruding end a2. Through the cooperation of the contoured surface at the bottom of the clamping block 51 and the contoured surface of the bottom positioning block 2, the two protruding ends a2 can be completely enclosed. To ensure that the two protruding ends a2 are subjected to uniform force and remain stable during processing, thereby ensuring that no deformation occurs during processing.

[0013] The clamping drive structure 52 is based on a lever-type hydraulic cylinder in the prior art; the output end of the lever-type hydraulic cylinder is connected to the tail end of the Y-shaped clamping block 51, driving the Y-shaped head of the clamping block 51 to open and close in the vertical direction. The specific connection method is based on the prior art.

[0014] The side positioning block 3 is set on one side of the bottom positioning block 2, located on the side of the through hole to be processed in the workpiece.

[0015] The side clamping structure 4 is located on the other side of the bottom positioning block 2; for example Figure 3 and Figure 5 As shown, the side clamping structure 4 includes: an L-shaped clamping lever 41, a side rotating shaft 43, a clamping drive structure, and a mounting base 45; the mounting base 45 is disposed above the base 1.

[0016] A side-mounted rotating shaft 43 is horizontally mounted on a mounting base 45 in a direction perpendicular to the axis of the through hole to be processed on the workpiece. The bent portion of the horizontal and vertical plates of the clamping lever 41 is movably fitted onto the side-mounted rotating shaft 43. A clamping head 46 is provided on the top of the L-shaped vertical plate of the clamping lever 41, facing the workpiece. In this embodiment, the clamping head 46 is arc-shaped. A second guide hole 42 is provided on the clamping head 46. When the clamping head 46 is in the clamping workpiece state, the second guide hole 42 is coaxial with the through hole to be processed on the workpiece. The horizontal plate of the clamping lever 41 is oriented away from the workpiece. The clamping drive structure is located below the horizontal plate of the clamping lever 41 and achieves linear motion along the vertical direction. The clamping drive structure is implemented based on a linear drive device, such as a cylinder or a hydraulic cylinder. In this application, it is implemented based on a hydraulic cylinder.

[0017] Specifically, the clamping drive structure includes a single-acting cylinder 44 and a single-acting cylinder connector 47. The single-acting cylinder 44 is positioned below the end of the horizontal plate of the clamping lever 41 with its output end vertically upward. The single-acting cylinder connector 47 is located at the output end of the single-acting cylinder 44. When the single-acting cylinder 44 is activated, it drives the single-acting cylinder connector 47 to move upward, applying an upward thrust to the end of the horizontal plate of the clamping lever 41. The clamping lever 41 rotates about its side using a rotating shaft 43 as an axis, and the clamping head 46 on the vertical rod of the clamping lever 41 applies a horizontal thrust to the side of the workpiece to be processed. When the single-acting cylinder 44 is activated in the reverse direction, it drives the single-acting cylinder connector 47 to move downward, away from the end of the horizontal plate of the clamping lever 41. The end of the horizontal plate of the clamping lever 41 moves downward under the action of gravity, causing the clamping head 46 on the vertical rod to move away from the side of the workpiece to be processed.

[0018] In this embodiment, the side positioning block 3 and the clamping lever 41 are simultaneously positioned on both sides of the processing area of ​​the first through hole a3. The contoured surface at the bottom of the clamping block 51 and the contoured surface of the bottom positioning block 2 cooperate to firmly enclose the area where the second through hole a3' is located. Then, the clamping heads 46 on the side positioning block 3 and the clamping lever 41 clamp both sides of the first through hole a3, thus achieving clamping and positioning of the processing areas of both through holes a3 and a3', ensuring the stability of the processing area during processing, and thus guaranteeing processing accuracy. A first guide hole 31 coaxial with the first through hole a3 is provided on the side positioning block 3, and a second guide hole 42 coaxial with the first through hole a3 is provided on the clamping head 46, ensuring precise processing of the first through hole a3.

[0019] During processing, the workpiece is placed on the bottom positioning block 2 according to its outer contour, with one end face pressed against the side positioning block 3. After positioning, the hydraulic switch of the equipment is activated. The lever-type oil cylinder drives the clamping block 51 to clamp the workpiece from above, and the single-acting cylinder 44 extends to drive the top clamping lever 41 to clamp the workpiece from the side. Then, the first through hole a3 and the second through hole a3' on the two protruding ends of the workpiece are processed. After processing is completed, the hydraulic switch is turned off, and the clamping block 51 and the top clamping lever 41 return to their original positions with the oil cylinder, allowing the workpiece to be removed.

[0020] To improve processing efficiency and enable continuous processing, N sets of positioning and clamping structures are provided on the base 1, where N is a natural number greater than or equal to 1. In this embodiment, the value of N is set to 2.

[0021] Using the technical solution of this utility model, a hydraulic rotating clamp is used to process the workpiece, and a hydraulic cylinder is used to achieve precise positioning and clamping of the workpiece. Through the cooperation of the bottom positioning block 2 and the clamping structure 5, as well as the cooperation of the side clamping structure 4 and the side positioning block 3, the stability of the clamping and the accuracy of the positioning are improved, avoiding errors in workpiece positioning, clamping, and processing, improving the precision of part processing, ensuring clamping speed, and effectively improving the processing efficiency and quality of the workpiece.

Claims

1. A fixture for machining connectors, characterized in that, It includes: A base, a positioning structure, and a clamping structure, wherein the positioning structure and the clamping structure are mounted on the base; The positioning structure includes: a bottom positioning block and a side positioning block; The top surface of the bottom positioning block is provided with a contour surface that matches the shape of the workpiece to be processed; The side positioning block is disposed on one side of the bottom positioning block, located on the side of a through hole to be processed in the workpiece; the side positioning block is provided with a first guide hole coaxial with the through hole to be processed; The clamping structure includes: a side clamping structure and a pressing structure; The clamping structure includes a clamping block and a clamping drive structure. The clamping block is Y-shaped, with two branches at the head corresponding to the two protruding ends of the workpiece to be processed. The bottom surface of the clamping block is provided with a contoured surface that matches the shape of the workpiece to be processed. The clamping block clamps the workpiece above the workpiece based on the clamping drive structure. The side clamping structure is located on the other side of the bottom positioning block; The side clamping structure includes: a mounting base, a side rotating shaft, an L-shaped clamping lever, and a clamping drive structure; The mounting base is disposed above the base; The side-mounted rotating shaft is horizontally positioned on the mounting base in a direction perpendicular to the axis of the through hole to be machined on the workpiece; the bent portion of the horizontal and vertical plates of the clamping lever is movably fitted onto the side-mounted rotating shaft; a clamping head is provided at the top of the L-shaped vertical plate of the clamping lever, facing the workpiece; a second guide hole is provided on the clamping head, the second guide hole being coaxial with the through hole to be machined on the workpiece; the horizontal plate of the clamping lever is positioned away from the workpiece. The clamping drive structure is located below the end of the clamping lever horizontal plate and achieves linear movement in the vertical direction.

2. The clamp for processing a connector according to Claim 1, wherein: The bottom positioning block has two contoured surfaces, which correspond to the two protruding ends of the workpiece to be processed.

3. The fixture of claim 1 wherein: The bottom positioning block has a contoured surface that is inclined with one end higher than the other. The lower end is provided with a semi-circular groove, the shape of which is adapted to the end shape of the protruding end of the workpiece to be processed. The side positioning block and the clamping lever are located on both sides of the through hole to be processed at the higher end.

4. The clamp of claim 1, wherein: The clamping drive structure is based on a lever-type hydraulic cylinder.

5. The fixture of claim 1 wherein: A connecting flange is provided on one side of the base.

6. The clamp of claim 1, wherein: The base is provided with N sets of positioning structures and clamping structures, where N is a natural number greater than or equal to 1.

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