End face pressing clamp for rhombic part

Abstract

The end face pressing clamp comprises a base, a pressing block, a fixed pin and a movable pin, the base is a cylinder, the pressing block is arranged on the base and used for pressing the end face of the rhombic part, and the fixed pin and the movable pin are oppositely arranged on the base and used for positioning the rhombic part. According to the end face pressing clamp for the rhombic part, the conical part can be clamped in an end face pressing mode, the rhombic edge of the rhombic part does not need to be positioned, clamping, positioning and alignment are more accurate, and the machining precision is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of machining fixtures, and in particular relates to an end face pressing fixture for diamond-shaped parts. Background Art

[0002] A diamond-shaped part needs to be clamped on a lathe to turn its inner hole. Since its diamond shape is not a centrally symmetrical structure, it is difficult to center and clamp it using the three-jaw chuck on the lathe.

[0003] In the prior art, a lathe fixture for machining hinged plate-type flapper valve bodies, such as that disclosed in Chinese patent publication CN 203779150 U, forms a diamond-shaped clamping area between two semi-lunar clamping bodies. Multiple radial mounting grooves are provided around the periphery of the lower disc, each containing a clamping block. The front ends of the clamping blocks extend into the diamond-shaped clamping area to clamp the diamond-shaped valve body. However, in this prior art, the diamond-shaped clamping area has an excessively large contact surface with the part. Due to the tolerances of the diamond-shaped parts' edges, positioning and clamping using the diamond edges cannot meet machining accuracy requirements. Utility Model Content

[0004] The purpose of the utility model is to provide a clamp for pressing end faces of diamond-shaped parts, so as to solve the problem in the prior art that the positioning and clamping method using diamond edges cannot meet the machining accuracy.

[0005] To this end, the utility model provides a clamp for pressing the end face of a diamond-shaped part, comprising: a base, a pressing block, a fixed pin and a movable pin. The base is a cylinder, the pressing block is arranged on the base to press the end face of the diamond-shaped part, and the fixed pin and the movable pin are relatively arranged on the base to position the diamond-shaped part.

[0006] Preferably, a boss is provided on the base, and a centering hole is provided at the center of the base, which is used for centering the diamond-shaped part.

[0007] Preferably, the boss is provided with a fixed pin hole and a movable pin hole, the fixed pin hole and the movable pin hole being symmetrical with respect to the centering hole, the fixed pin being located in the fixed pin hole, and the movable pin being located in the movable pin hole. The fixed pin and the movable pin serve to position and secure the diamond-shaped part, the fixed pin being fixedly connected to the fixed pin hole, and the movable pin being detachably connected to the fixing plate in the movable pin hole.

[0008] Preferably, the movable pin hole passes through the bottom surface of the base.

[0009] Preferably, the movable pin hole is provided with a truncated cone groove at one end of the bottom surface of the base, a fixing plate is provided in the truncated cone groove, and the fixing plate is fixedly connected to the movable pin.

[0010] Preferably, the top surface of the movable pin is provided with a tapered surface. Fine adjustment can be performed through the tapered surface of the movable pin, effectively preventing the movable pin from being unable to be positioned due to the tolerance of the diamond-shaped part.

[0011] Preferably, the boss is provided with a plurality of fixing grooves, and the pressing block is arranged in the fixing grooves.

[0012] Preferably, the pressing block includes a pressing surface portion, a connecting portion and a fixing portion, the pressing surface portion and the fixing portion are horizontally arranged, the connecting portion is vertically arranged, the pressing surface portion and the fixing portion are respectively arranged at the upper end and the lower end of the connecting portion, and the extension directions of the pressing surface portion and the fixing portion are opposite, and the fixing portion is fixed in the fixing groove.

[0013] Preferably, the connecting portion is parallel to the rhombus side of the rhombus part and is close to the rhombus side of the rhombus part.

[0014] Preferably, the pressing blocks are provided with two and are arranged at two opposite rhombus sides of the rhombus part. The pressing blocks press the end faces of the rhombus part through the pressing surface parts, thereby facilitating the clamping of the rhombus part.

[0015] Beneficial effects:

[0016] 1. The utility model provides a clamp for pressing the end face of diamond-shaped parts, which can clamp the tapered parts by pressing the end face. There is no need to position the diamond side of the diamond-shaped parts, so that the clamping positioning and alignment are more accurate and the processing accuracy is guaranteed.

[0017] 2. The prior art clamps diamond-shaped parts by combining two diamond-shaped clamping areas. However, the contact surface between the diamond-shaped clamping area and the part is too large. Due to the tolerance of the diamond-shaped edges of the diamond-shaped parts, the diamond-edge positioning and clamping method cannot meet the processing accuracy requirements. The utility model uses centering holes for centering, fixed pins and movable pins for positioning, and a pressure block to press the end face of the diamond-shaped part. This avoids the problem of large diamond edge tolerance affecting processing accuracy. At the same time, the end face pressing method can improve the clamping force and ensure the stability of the clamping.

[0018] 3. In the present invention, the top surface of the movable pin is provided with a conical surface, through which fine adjustment can be performed, thereby effectively preventing the situation in which the movable pin cannot be positioned due to the tolerance of the diamond-shaped parts.

[0019] 4. The pressure block in the utility model includes a pressing surface portion, a connecting portion and a fixing portion. The pressing surface portion and the fixing portion are arranged horizontally, and the connecting portion is arranged vertically. The pressing surface portion and the fixing portion are arranged at the upper end and the lower end of the connecting portion respectively, and the extension direction of the pressing surface portion is opposite to that of the fixing portion, so that the pressure block is Z-shaped, maintaining stability while pressing the diamond-shaped parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 The present invention is a structural schematic diagram of an embodiment of a clamp for pressing end faces of diamond-shaped parts provided by the present invention.

[0022] Figure 2 This is a schematic diagram of the back structure of an embodiment of a clamp for pressing end faces of diamond-shaped parts provided by the utility model.

[0023] Figure 3 This is a structural schematic diagram of a base of an embodiment of a clamp for pressing end faces of diamond-shaped parts provided by the utility model.

[0024] Figure 4 The present invention is a schematic structural diagram of a pressing block of an embodiment of a clamp for pressing end faces of diamond-shaped parts provided by the present invention.

[0025] Figure 5 The utility model provides a schematic structural diagram of a diamond-shaped part according to an embodiment of a clamp for pressing end faces of diamond-shaped parts.

[0026] Figure 6 This is a schematic diagram of the back structure of a diamond-shaped part according to an embodiment of a clamp for pressing the end face of a diamond-shaped part provided by the utility model.

[0027] In the figure, 1-base, 11-boss, 12-centering hole, 13-fixing pin hole, 14-movable pin hole, 15-cone groove, 16-fixing groove, 2-pressing block, 21-pressing surface part, 22-connecting part, 23-fixing part, 3-fixing pin, 4-movable pin, 5-fixing plate, 6-diamond part, 61-positioning hole, 62-circular hole, 63-pressing groove, 64-centering platform. DETAILED DESCRIPTION

[0028] The present invention can be more easily understood by referring to the following detailed description of the preferred embodiments of the present invention and the included Examples. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as commonly understood by one of ordinary skill in the art to which the present invention belongs. In the event of any conflict, the definitions in this specification shall prevail.

[0029] Example 1:

[0030] The utility model provides an end face pressing fixture for diamond-shaped parts, which can clamp tapered parts by pressing the end faces, without the need to position the diamond edges of the diamond-shaped parts, making clamping, positioning and alignment more accurate and ensuring processing accuracy.

[0031] In this embodiment, the diamond-shaped parts to be processed are as follows: Figure 5-6 As shown, the angles of the four diamond sides are transitioned through rounded corners, positioning holes 61 are set at the two acute angles, a circular hole 62 to be processed is set in the center, pressing grooves 63 are set on the four diamond sides, and a centering platform 64 is set in the center of the back.

[0032] Provides such Figure 1-4 The end face pressing fixture for diamond-shaped parts shown in the figure includes: a base 1, a pressing block 2, a fixed pin 3 and a movable pin 4. The base 1 is a cylinder, the pressing block 2 is arranged on the base 1, and the fixed pin 3 and the movable pin 4 are arranged on the base 1 relatively.

[0033] A boss 11 is provided on the base 1, and a centering hole 12 is provided at the center of the base 1. A fixed pin hole 13 and a movable pin hole 14 are provided on the boss 11. The fixed pin hole 13 and the movable pin hole 14 are symmetrical with respect to the centering hole 12. The fixed pin 3 is in the fixed pin hole 13, and the movable pin 4 is in the movable pin hole 14. The movable pin hole 14 passes through the bottom surface of the base 1. The movable pin hole 14 is provided with a frustum groove 15 at one end of the bottom surface of the base 1, and a fixing plate 5 is provided in the frustum groove 15. The fixing plate 5 is fixedly connected to the movable pin 4, and the top surface of the movable pin 4 is provided with a conical surface 41.

[0034] Two fixing grooves 16 are provided on the boss 11, and the pressing block 2 is arranged in the fixing groove 16. The pressing block 2 includes a pressing surface portion 21, a connecting portion 22 and a fixing portion 23. The pressing surface portion 21 and the fixing portion 23 are arranged horizontally, and the connecting portion 22 is arranged vertically. The pressing surface portion 21 and the fixing portion 23 are respectively arranged at the upper end and the lower end of the connecting portion 22, and the extension directions of the pressing surface portion 21 and the fixing portion 23 are opposite. The fixing portion 23 is fixed in the fixing groove 16, and the connecting portion 22 is parallel to the rhombus side of the rhombus part and close to the rhombus side of the rhombus part. There are two pressing blocks 2 and they are arranged at two opposite rhombus sides of the rhombus part.

[0035] Working principle: One positioning hole 61 of the diamond-shaped part 6 is passed through the fixed pin 3, and the other positioning hole 61 is passed through the movable pin 4. The diamond-shaped part 6 is pressed tightly and the centering platform 64 is placed into the centering hole 12 for centering. Then, the fixing portion 23 of the pressing block 2 is fixed with bolts, and the pressing surface end of the pressing block 2 presses the end surface of the diamond-shaped part 6 in the pressing groove 63.

Claims

1. A clamp for pressing end faces of diamond-shaped parts, characterized in that: include: A base, a pressing block, a fixed pin and a movable pin. The base is a cylinder. The pressing block is arranged on the base to press the end surface of the diamond-shaped part. The fixed pin and the movable pin are arranged on the base relative to each other to position the diamond-shaped part. A boss is provided on the base, and a centering hole is provided at the center of the base; The boss is provided with a plurality of fixing grooves, and the pressing block is arranged in the fixing grooves; The pressing block includes a pressing surface portion, a connecting portion and a fixing portion. The pressing surface portion and the fixing portion are arranged horizontally, and the connecting portion is arranged vertically. The pressing surface portion and the fixing portion are arranged at the upper end and the lower end of the connecting portion respectively, and the extending directions of the pressing surface portion and the fixing portion are opposite. The fixing portion is fixed in the fixing groove.

2. The end face pressing fixture for diamond-shaped parts according to claim 1, characterized in that: A fixed pin hole and a movable pin hole are provided on the boss, and the fixed pin hole and the movable pin hole are symmetrical with respect to the centering hole. The fixed pin is in the fixed pin hole, and the movable pin is in the movable pin hole.

3. The end face pressing fixture for diamond-shaped parts according to claim 2, characterized in that: The movable pin hole penetrates to the bottom surface of the base.

4. The end face pressing fixture for diamond-shaped parts according to claim 3, characterized in that: The movable pin hole is provided with a truncated cone groove at one end of the bottom surface of the base, and a fixing piece is provided in the truncated cone groove, and the fixing piece is fixedly connected to the movable pin.

5. The end face pressing fixture for diamond-shaped parts according to claim 1 or 4, characterized in that: The top surface of the movable pin is provided with a tapered surface.

6. The end face pressing fixture for diamond-shaped parts according to claim 1, characterized in that: The connecting portion is parallel to the rhombus side of the rhombus part and is close to the rhombus side of the rhombus part.

7. The end face pressing fixture for diamond-shaped parts according to claim 6, characterized in that: There are two pressing blocks, which are arranged at two opposite rhombus sides of the rhombus part.

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