A quick clamping fixture for gun drill grinding

Abstract

The invention discloses a quick clamping fixture for gun drill grinding, comprising a base, a clamping part and a clamping screw, an air avoidance groove and an assembly threaded hole are provided in the middle position of the base, the clamping part comprises a clamping part body and a screw fixing part, the screw fixing part is tiltedly arranged at the lower end of the clamping part body, a threaded hole is provided on the screw fixing part, the clamping screw is penetrated and arranged in the screw fixing part, a gun drill installation reference surface is provided at the lower end of the clamping part body, the gun drill installation reference surface is arranged opposite to the clamping screw, and an accommodation space for accommodating the clamping screw and the gun drill movement is formed between the gun drill installation reference surface and the clamping part body. In manual tool gun drill grinding and repair, the gun drill can be quickly clamped, the positioning is accurate, the clamping part can be replaced, and the gun drill installation reference surface can be replaced according to the actual type of gun drill to be processed to cope with gun drills of various groove types.

Description

Technical Field

[0001] The invention relates to the technical field of tool processing, in particular to a quick clamping fixture for gun drill grinding. Background Art

[0002] When using manual tools to sharpen a gun drill, a universal grinding head is usually used to install a spring collet for clamping. When clamping, the tool handle and the collet must be passed through, which is very easy to bump into, especially when withdrawing after grinding. If there is a bump, it needs to be re-sharpened. In addition, since the collet is round, the gun drill needs to be realigned after each clamping, and the error is large, resulting in large geometric angle errors of the gun drill and unstable quality. In addition, workers are very cautious and the speed is very slow during clamping. Summary of the invention

[0003] Purpose of the invention: In view of the problems and shortcomings in the above-mentioned prior art, the purpose of the present invention is to provide a quick clamping fixture for gun drill grinding. The gun drill can be quickly clamped, the positioning is accurate, the clamping part is replaceable, and the gun drill installation reference surface can be replaced according to the actual type of gun drill to be processed, so as to cope with gun drills of various groove types.

[0004] Technical solution: In order to achieve the above-mentioned purpose, a quick clamping fixture for gun drill grinding described in the present invention includes a base and a clamping part. The middle position of the base is provided with an air avoidance groove and an assembly threaded hole. The clamping part includes a clamping part body, a screw fixing part and a crimping screw. The screw fixing part is obliquely arranged at the lower end of the clamping part body, and the screw fixing part is provided with an assembly threaded hole. The crimping screw is penetrated and arranged in the screw fixing part. A gun drill installation reference surface is provided at the lower end of the clamping part body. The gun drill installation reference surface is arranged opposite to the crimping screw. An accommodating space for accommodating the crimping screw and the gun drill movement is formed between the gun drill installation reference surface and the clamping part body.

[0005] Furthermore, an adjusting handle is provided on the crimping screw rod, and the adjusting handle is used to adjust the crimping screw rod, so as to facilitate the loading and unloading operations of the gun drill.

[0006] Furthermore, the gun drill installation reference surface matches the gun drill to be processed.

[0007] Furthermore, the gun drill installation reference surface includes a first cutting surface, a second cutting surface and an inclined connection part, and the first cutting surface and the second cutting surface are respectively arranged between the inclined connection parts. The gun drill installation reference surface can be replaced according to the actual type of gun drill to be processed to cope with gun drills of various groove types.

[0008] Furthermore, the angle formed between the first cutting surface and the inclined connecting portion is 145°, the angle formed between the second cutting surface and the inclined connecting portion is 145°, and the angle formed between the inclined connecting portion and the horizontal line is 45°.

[0009] Furthermore, a vertical connection portion and an arc-shaped connection portion are provided between the screw fixing portion and the gun drill installation reference surface.

[0010] Furthermore, arc grooves are provided on the base at both upper and lower sides of the air avoidance groove, and the two arc grooves are arranged obliquely and symmetrically.

[0011] It can be seen from the above technical solution that the beneficial effects of the present invention are:

[0012] (1) The quick clamping fixture for gun drill grinding described in the present invention can quickly clamp the gun drill during manual tool gun drill grinding, with precise positioning and a replaceable clamping part. The gun drill mounting reference surface can be replaced according to the actual type of gun drill to be processed to cope with gun drills of various groove types.

[0013] (2) The quick clamping fixture for gun drill grinding described in the present invention is installed on a universal tool pliers. The gun drill is installed with the front cutting edge as the reference, with accurate positioning and small error. After the first gun drill is installed in the clamping part, the subsequent clamping is stable and unchanged, which greatly reduces the clamping time and improves the efficiency by 4 to 5 times. Moreover, the gun drill is clamped from the side, so the gun drill cutting edge will not hit the fixture, and the yield rate is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention;

[0015] Figure 2 for Figure 1 Left view of

[0016] Figure 3 It is a structural schematic diagram of the clamping part of the present invention;

[0017] Figure 4 It is a structural schematic diagram of the base of the present invention;

[0018] Figure 5 It is a structural schematic diagram of the gun drill installation reference surface of the present invention.

[0019] In the figure: base 1, arc groove 11, clamping part 2, clamping part body 21, gun drill installation reference surface 211, cutting surface 1 211a, cutting surface 211b, inclined connection part 211c, screw fixing part 22, vertical connection part 221, arc connection part 222, crimping screw 23, air avoidance groove 3, assembly threaded hole 4, adjustment handle 5, gun drill 100. DETAILED DESCRIPTION

[0020] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments.

[0021] like Figure 1-4A quick clamping fixture for gun drill grinding is shown, comprising a base 1 and a clamping part 2. An air avoidance groove 3 and an assembly threaded hole 4 are provided in the middle position of the base 1. The clamping part 2 comprises a clamping part body 21, a screw fixing part 22 and a crimping screw 23. The screw fixing part 22 is obliquely arranged at the lower end of the clamping part body 21. The screw fixing part 22 is provided with an assembly threaded hole 4. The crimping screw 23 is penetrated and arranged in the screw fixing part 22. A gun drill installation reference surface 211 is provided at the lower end of the clamping part body 21. The gun drill installation reference surface 211 is arranged opposite to the crimping screw 23. An accommodating space for accommodating the crimping screw 23 and the movement of the gun drill 100 is formed between the gun drill installation reference surface 211 and the clamping part body 21.

[0022] In this embodiment, the crimping screw 23 is provided with an adjusting handle 5 .

[0023] In this embodiment, the gun drill installation reference surface 211 matches the gun drill 100 to be processed.

[0024] like Figure 5 As shown, the gun drill installation reference surface 211 includes a first contact surface 211a, a second contact surface 211b and an inclined connection portion 211c, and the first contact surface 211a and the second contact surface 211b are respectively arranged between the inclined connection portion 211c.

[0025] In this embodiment, the angle between the first contact surface 211a and the inclined connection portion 211c is 145°, the angle between the second contact surface 211b and the inclined connection portion 211c is 145°, and the angle between the inclined connection portion 211c and the horizontal line is 45°.

[0026] In this embodiment, a vertical connection portion 221 and an arc-shaped connection portion 222 are provided between the screw fixing portion 22 and the gun drill installation reference surface 211 .

[0027] In this embodiment, arc grooves 11 are provided on the base 1 at both upper and lower sides of the air avoidance groove 3, and the two arc grooves 11 are arranged obliquely and symmetrically.

[0028] The embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalents of the present invention will fall within the scope defined by the claims attached to this application for those skilled in the art.

Claims

1. A quick clamping fixture for gun drill grinding, characterized by: The invention comprises a base (1) and a clamping part (2), wherein a clearance groove (3) and an assembly threaded hole (4) are provided at the middle position of the base (1), and the clamping part (2) comprises a clamping part body (21), a screw fixing part (22) and a crimping screw (23), wherein the screw fixing part (22) is arranged obliquely at the lower end of the clamping part body (21), the screw fixing part (22) is provided with a threaded hole, and the crimping screw (23) is arranged through the screw fixing part (22), and a gun drill installation reference surface (211) is provided at the lower end of the clamping part body (21), the gun drill installation reference surface (211) and the crimping screw (23) are arranged opposite to each other, and an accommodation space for accommodating the crimping screw (23) and the movement of the gun drill (100) is formed between the gun drill installation reference surface (211) and the clamping part body (21).

2. The quick clamping fixture for gun drill grinding according to claim 1, characterized in that: The crimping screw (23) is provided with an adjustment handle (5).

3. The quick clamping fixture for gun drill grinding according to claim 1, characterized in that: The gun drill installation reference surface (211) matches the gun drill (100) to be processed.

4. The quick clamping fixture for gun drill grinding according to claim 1, characterized in that: The gun drill installation reference surface (211) comprises a first engaging surface (211a), a second engaging surface (211b) and an inclined connection portion (211c); the first engaging surface (211a) and the second engaging surface (211b) are respectively arranged between the inclined connection portion (211c).

5. The quick clamping fixture for gun drill grinding according to claim 4, characterized in that: The angle formed between the first cutting surface (211a) and the inclined connecting portion (211c) is 145°, the angle formed between the second cutting surface (211b) and the inclined connecting portion (211c) is 145°, and the angle formed between the inclined connecting portion (211c) and the horizontal line is 45°.

6. The quick clamping fixture for gun drill grinding according to claim 1, characterized in that: A vertical connection portion (221) and an arc-shaped connection portion (222) are provided between the screw fixing portion (22) and the gun drill installation reference surface (211).

7. The quick clamping fixture for gun drill grinding according to claim 1, characterized in that: The base (1) is provided with arc-shaped grooves (11) on both upper and lower sides of the air avoidance groove (3), and the two arc-shaped grooves (11) are arranged obliquely and symmetrically.

Images