Positioning tool for linear cutting machining

Abstract

The utility model relates to a linear cutting machining positioning tool which comprises a reference positioning supporting plate, a positioning plate and a pressing plate, the reference positioning supporting plate is provided with a supporting plate portion and a positioning portion, the top face of the supporting plate portion is a bearing face, and the side face, close to one side of the bearing face, of the positioning portion is a first positioning face. The positioning plate is connected to the side face, perpendicular to the first positioning face, of the positioning part, the side face, facing the bearing face, of the positioning plate is a second positioning face, and the bearing face, the first positioning face and the second positioning face are perpendicular to one another. One end of the bottom face of a cylindrical workpiece to be cut is supported on the bearing face, the outer side face of the cylindrical workpiece to be cut is tangent to the first positioning face and the second positioning face, the pressing plate is connected to the upper portion of the positioning part through bolts, and the bottom face of the pressing plate tightly presses the top face of the workpiece to be cut. After the tool clamps the workpiece, it can be guaranteed that the machining face of the workpiece is perpendicular to the end face only by correcting the perpendicularity of the bearing face and the molybdenum wire, and correction efficiency is improved.

Description

Technical Field

[0001] This utility model relates to a cutting and positioning fixture, belonging to the field of wire EDM fixture technology. Background Technology

[0002] In the existing technology, the spline shape needs to be processed by wire EDM. During the clamping process, the workpiece may be unstable or tilted, making it difficult to ensure that the machined surface is perpendicular to the end face, which brings great difficulties to the correction and processing. At the same time, the existing correction method is to correct the center of the inner hole of the workpiece, and the correction reference plane is short, resulting in poor correction accuracy and low efficiency. Utility Model Content

[0003] In order to solve the problems existing in the prior art, this utility model provides a clamping and positioning fixture that improves the correction efficiency and ensures that the machining surface of the spline workpiece is perpendicular to the end face.

[0004] To achieve the above objectives, the technical solution proposed by this utility model is as follows: a wire EDM positioning fixture for positioning a workpiece to be cut, wherein the workpiece to be cut is cylindrical, and the positioning fixture includes a reference positioning support plate, a positioning plate, and a pressure plate. The reference positioning support plate is provided with a support plate portion and a positioning portion. The top surface of the support plate portion is a supporting surface, and the side of the positioning portion near the supporting surface is a positioning surface one. The positioning plate is connected to the side of the positioning portion perpendicular to the positioning surface one, and the side of the positioning plate facing the supporting surface is a positioning surface two. The supporting surface, positioning surface one, and positioning surface two are arranged perpendicularly to each other.

[0005] The bottom surface of the workpiece to be cut is supported on the support surface at one end, and the outer side is tangent to the first positioning surface and the second positioning surface respectively. The pressure plate is connected to the upper part of the positioning part by bolts, and the bottom surface of the pressure plate presses against the top surface of the workpiece to be cut.

[0006] A further design of the above technical solution is as follows: an avoidance groove is provided at the connection between the supporting surface and the positioning surface.

[0007] The top surface of the positioning part is provided with a longitudinally arranged pressure plate screw hole. The pressure plate is provided with a through hole that mates with the pressure plate screw hole. The pressure plate is connected to the top of the positioning part by a bolt passing through the through hole and screwing into the pressure plate screw hole.

[0008] The positioning part has a positioning screw hole on a side perpendicular to the positioning surface. The positioning plate has a through hole two that mates with the positioning screw hole. The positioning plate is fixed to the positioning part by screwing a bolt through the through hole two and then screwing it into the positioning screw hole.

[0009] The second positioning surface of the positioning plate is in contact with the corresponding side of the positioning part.

[0010] The pressure plate is provided with a support rod at the end away from the support plate, and the support rod abuts against the top surface of the positioning part.

[0011] The positioning part of the reference positioning plate is provided with a fixing hole, and the reference positioning plate is fixed to the workbench through the fixing hole.

[0012] The beneficial effects of this utility model are as follows:

[0013] This utility model's wire EDM positioning fixture has a support surface, a positioning surface one, and a positioning surface two arranged perpendicularly to each other. When clamping and positioning the workpiece to be cut, the bottom surface of the workpiece can be supported on the support surface, and the outer surface is tangent to the positioning surface one and the positioning surface two respectively, preventing the workpiece from tilting. Only the perpendicularity between the support surface and the molybdenum wire needs to be corrected to ensure that the workpiece's processing surface is perpendicular to the end face. The correction is simple and quick, improving the correction and processing efficiency. Then, the pressure plate is used to press the top surface of the workpiece to be cut to achieve clamping and positioning, facilitating processing. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the reference positioning plate in this utility model;

[0015] Figure 2 This is a schematic diagram of the positioning plate in this utility model;

[0016] Figure 3 This is a schematic diagram of the pressure plate of this utility model;

[0017] Figure 4 This is a top view of the tooling of this utility model clamping the workpiece;

[0018] Figure 5 This is a front view of the tooling of this utility model clamping the workpiece;

[0019] In the diagram: 1-Reference positioning plate, 11-Plate section, 111-Supporting surface, 12-Positioning section, 121-Positioning surface one, 122-Positioning screw hole, 123-Pressure plate screw hole, 124-Fixing hole, 13-Allowing groove, 2-Positioning plate, 21-Positioning surface two, 22-Through hole two, 3-Pressure plate, 31-Through hole one, 32-Supporting hole, 4-Workpiece to be cut, 5-Supporting rod. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Example 1

[0021] The wire EDM positioning fixture in this embodiment, such as... Figure 1 , Figure 2 and Figure 3 As shown, it includes a reference positioning plate 1, a positioning plate 2, and a pressure plate 3, wherein, Figure 1The left side is the front view of the reference positioning plate 1, and the right side is the right view. The reference positioning plate 1 is provided with a plate part 11 and a positioning part 12, which form a right angle between them. The top surface of the plate part 11 is the support surface 111, and the side of the positioning part 12 near the support surface is the positioning surface 121. The top surface of the positioning part 12 is provided with a longitudinally arranged pressure plate screw hole 123, and the positioning part 12 is provided with a positioning screw hole 122 on the side perpendicular to the positioning surface 121.

[0022] Figure 2 The left side is the main view of the positioning plate 2, and the right side is the right view. The positioning plate 2 is provided with a through hole 22 that mates with the positioning screw hole. After the positioning plate 2 passes through the through hole 22 with a bolt, it is screwed into the positioning screw hole 122 and fixed to the side of the positioning part 12 that is perpendicular to the positioning surface. The side of the positioning plate 2 is in contact with the corresponding side of the positioning part 12. This side of the positioning plate 2, that is, the side of the positioning plate facing the support surface, is the positioning surface 21.

[0023] Figure 3 The left side is the main view of the pressure plate 3, and the right side is the right view. The pressure plate 3 is provided with a through hole 31 that mates with the pressure plate screw hole 123. The pressure plate 3 is connected to the positioning part 12 by a bolt passing through the through hole 31 and screwing it into the pressure plate screw hole 123.

[0024] like Figure 4 and Figure 5 As shown, the workpiece 4 to be cut is cylindrical. During positioning, one end of the bottom surface of the workpiece 4 is supported on the support surface 111, and the outer surface is tangent to the positioning surface 121 and the positioning surface 21 respectively. The central angle between the two tangents is 90°. The pressure plate 3 is connected to the positioning part 12 above by a bolt. The bottom surface of the pressure plate 3 presses against the top surface of the workpiece 4 to clamp and fix the workpiece. Since the support surface 111, the positioning surface 121 and the positioning surface 21 are set perpendicular to each other, it is only necessary to correct the support surface 111 of the reference positioning plate 1 so that the molybdenum wire is perpendicular to the support surface 111. This ensures that the spline shape after processing is perpendicular to the spline end face, thus improving the correction efficiency. Example 2

[0025] The positioning fixture in this embodiment is basically the same as that in Embodiment 1, except that: Figure 1 As shown, a clearance groove 13 is provided at the connection between the supporting surface 111 and the positioning surface 121. Due to the machining accuracy problem, it is difficult for the corner of the right angle surface to be a perfect right angle. Therefore, a clearance groove is provided here to ensure that the bottom and side surfaces of the workpiece 4 to be cut are completely in contact with the supporting surface 111 and the positioning surface 121.

[0026] like Figure 3 and Figure 5As shown, the end of the pressure plate 3 away from the support plate is also provided with a support hole 32. A support rod 5 is provided in the support hole 32. One end of the support rod 5 abuts against the top surface of the positioning part 12. By adjusting the length of the support rod 5, the bottom surface of the pressure plate 3 is parallel to the support surface 111 while the pressure plate 3 clamps the workpiece 4 to be cut. Then the bottom surface of the pressure plate 3 is in contact with the top surface of the workpiece 4 to be cut, ensuring that the workpiece 4 to be cut does not tilt after being pressed.

[0027] Combination Figure 1 As shown, the positioning part 12 of the reference positioning plate 1 is also provided with a fixing hole 124. When in use, the reference positioning plate 1 is fixed to the workbench through the fixing hole 124.

[0028] The technical solutions of this utility model are not limited to the above embodiments. All technical solutions obtained by equivalent substitution fall within the scope of protection claimed by this utility model.

Claims

1. A wire EDM positioning fixture for positioning a workpiece to be cut, the workpiece being cylindrical, characterized in that: The system includes a reference positioning plate, a positioning plate, and a pressure plate. The reference positioning plate has a plate portion and a positioning portion. The top surface of the plate portion is a support surface, and the side of the positioning portion near the support surface is a positioning surface one. The positioning plate is connected to the side of the positioning portion that is perpendicular to the positioning surface one, and the side of the positioning plate facing the support surface is a positioning surface two. The support surface, positioning surface one, and positioning surface two are arranged perpendicular to each other. The bottom surface of the workpiece to be cut is supported on the support surface at one end, and the outer side is tangent to the first positioning surface and the second positioning surface respectively. The pressure plate is connected to the upper part of the positioning part by bolts, and the bottom surface of the pressure plate presses against the top surface of the workpiece to be cut.

2. The wire EDM positioning fixture according to claim 1, characterized in that: An avoidance groove is provided at the connection between the supporting surface and the positioning surface.

3. The wire EDM positioning fixture according to claim 2, characterized in that: The top surface of the positioning part is provided with a longitudinally arranged pressure plate screw hole. The pressure plate is provided with a through hole that mates with the pressure plate screw hole. The pressure plate is connected to the top of the positioning part by a bolt passing through the through hole and screwing into the pressure plate screw hole.

4. The wire EDM positioning fixture according to claim 3, characterized in that: The positioning part has a positioning screw hole on a side perpendicular to the positioning surface. The positioning plate has a through hole two that mates with the positioning screw hole. The positioning plate is fixed to the positioning part by screwing a bolt through the through hole two and then screwing it into the positioning screw hole.

5. The wire EDM positioning fixture according to claim 4, characterized in that: The second positioning surface of the positioning plate is in contact with the corresponding side of the positioning part.

6. The wire EDM positioning fixture according to claim 5, characterized in that: The pressure plate is provided with a support rod at the end away from the support plate, and the support rod abuts against the top surface of the positioning part.

7. The wire EDM positioning fixture according to claim 6, characterized in that: The positioning part of the reference positioning plate is provided with a fixing hole, and the reference positioning plate is fixed to the workbench through the fixing hole.

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