Brazing diamond hole drill

Abstract

The utility model discloses a brazing diamond hole drill which comprises a drill shaft and a diamond wrapped on a shaft body at the top of the drill shaft, the coverage length of the diamond is L1, the wall thickness of the drill shaft is T, the top of the drill shaft is inclined, the inclined length is L2, the inclined angle is a, an inclined surface is arranged at the inclined end of the top of the drill shaft, the width of the inclined surface is T1, and the range of the inclined surface is 45-60% of the wall thickness T. The inclination of the inclined plane relative to the horizontal plane is b, and the value is between 40 degrees and 60 degrees; by the adoption of the scheme, after the top of the hole drill is inclined by a certain length, stable drilling can be achieved without inclination when a hole is machined, the machined hole is cylindrical, and the hole machining size precision is guaranteed. The device is simple in structure, easy in process control, stable in preparation and beneficial to batch stable production and manufacturing, and has high economic benefits.

Description

Technical Field

[0001] The utility model belongs to the field of diamond tool manufacturing, and more specifically, the utility model relates to a brazed diamond hole drill. Background Art

[0002] The brazed diamond hole drill can process brittle materials such as ceramics, glass, marble, etc. When drilling holes on the material surface, due to the high sharpness and high exposure of the brazed diamond, the hole drill can be dry drilled, and has high drilling efficiency and long working life, and is an ideal drilling tool for processing hard and brittle materials.

[0003] However, when the existing hole drills are drilling, they often need to be tilted at a certain angle to effectively drill. This is because when the drill bit drills vertically, the linear velocity of the diamond at the tip of the drill bit is affected by its radius and is often small, and the low linear velocity often brings low processing efficiency. Moreover, the surface of the stone material is relatively smooth, and it is difficult to effectively cut into the material during vertical processing. The general conventional operation is to first tilt at an angle of about 7-25 degrees, so that one side of the hole drill contacts the material, the contact area is small, and a cutting processing state is formed. Through this method, the initial positioning processing of the hole is carried out. Moreover, when the hole drill is tilted, the peripheral linear velocity around the normal axis will also increase accordingly, so that the hole can be effectively processed. And when processing, it can rotate around the normal of the material in a circle for drilling.

[0004] Although the above method can process holes, the outer diameter of the hole will increase due to the tilt of the hole drill at the upper edge of the hole, and the whole hole is in a flared shape. For some occasions with high hole processing accuracy, this hole drill processing method is difficult to handle.

[0005] Therefore, a new hole drill processing method is needed to achieve precise hole processing. On the other hand, when the hole accuracy requirement is high, it is generally processed in cooperation with a drilling device, and the device is more suitable for vertical processing. When it is tilted at a certain angle for processing, it needs to rotate around the vertical normal circle, which places high requirements on the device. General devices are difficult to match, and the processing program also needs to be continuously changed according to the processing object and process requirements. The simplest method is still vertical processing.

[0006] When the conventional hole drill is processed vertically, only the diamond at the tip of the hole drill can effectively remove the material, and the diamond on the side wall only plays a role in positioning and friction removal, and it is difficult to effectively process the material. In this way, the efficiency is low and the chip removal is difficult. When the working condition load is large, it is extremely easy to cause the hole drill to be scrapped due to high temperature or diamond fracture. Summary of the Utility Model

[0007] In order to solve the above technical problems, the utility model provides a brazed diamond hole drill.

[0008] To achieve the above object, the technical solution adopted by the present utility model is as follows:

[0009] A brazed diamond hole drill includes a drill shaft and diamonds coated on the shaft body at the top of the drill shaft. The covering length of the diamonds is L1. The wall thickness of the drill shaft is T. The top of the drill shaft is inclined, with an inclined length of L2 and an inclination angle of a. The inclined end of the top of the drill shaft is provided with an inclined surface, the width of the inclined surface is T1, and the range is 45-60% of the wall thickness T. The inclination of the inclined surface with respect to the horizontal plane is b, and its value is between 40° and 60°.

[0010] The present utility model discloses a brazed diamond hole drill, and the particle size of the diamonds is 40 mesh to 60 mesh.

[0011] The present utility model discloses a brazed diamond hole drill, and the range of the wall thickness T is: 0.4-2.0 mm.

[0012] The present utility model discloses a brazed diamond hole drill, and the inclined length L2 is 5-10 mm.

[0013] The present utility model discloses a brazed diamond hole drill, and the range of L1 is: 3-40 mm.

[0014] The present utility model discloses a brazed diamond hole drill, and the range of the inclination angle a is: 10°-30°.

[0015] Adopting the solution of the present utility model, compared with the prior art, it has the following beneficial effects:

[0016] After setting a section of the top of the hole drill to be inclined, stable drilling can be achieved without inclination during hole processing. The morphology of the processed hole is cylindrical, ensuring the dimensional accuracy of the hole processing. The structure of the present utility model is simple, the process is easy to control, the preparation is stable, which is conducive to mass and stable production and manufacturing, and has high economic benefits.

[0017] The following will combine the drawings and embodiments to describe the present utility model in more detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following briefly describes the content expressed by each drawing in this specification and the marks in the drawings:

[0019] Figure 1 It is a schematic diagram of the present utility model;

[0020] The marks in the figure are: 1. Drill shaft; 2. Diamond. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following will make a further detailed description of the specific implementation manners of the present utility model, such as the shapes, structures of the components involved, the mutual positions and connection relationships between the various parts, the functions and working principles of the various parts, the manufacturing processes, the operation and usage methods, etc., with reference to the accompanying drawings, so as to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present utility model.

[0022] A brazed diamond hole drill includes a drill shaft 1 and diamonds 2 coated on the shaft body at the top of the drill shaft. The covering length of the diamonds 2 is L1. The wall thickness of the drill shaft 1 is T. The top of the drill shaft 1 is inclined, with an inclined length of L2 and an inclination angle of a. An inclined end of the top of the drill shaft 1 is provided with an inclined surface, and the width of the inclined surface is T1, which ranges from 45% to 60% of the wall thickness T. The inclination of the inclined surface with respect to the horizontal plane is b, and its value is between 40° and 60°. The particle size of the diamonds ranges from 40 mesh to 60 mesh. The range of the wall thickness T is 0.4 - 2.0 mm. The inclined length L2 is 5 - 10 mm. The range of L1 is 3 - 40 mm. The range of the inclination angle a is 10° - 30°.

[0023] It should be noted that: the top diameter of the finished hole drill is smaller than the outer diameter of the conventional hole, forming a necked-in state; for the diamonds arranged at the top and on the side of the hole, when the hole drill is vertically drilling, not only the top diamonds participate in removing materials, but also the side diamonds will participate in processing materials due to the inclination of the angle, thus making up for the disadvantage of the reduced removal amount caused by the decrease in the hole diameter, and keeping the overall removal amount of the hole drill basically unchanged.

[0024] The above has made an exemplary description of the present utility model with reference to the accompanying drawings. Obviously, the specific implementation of the present utility model is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present utility model, or the concept and technical solution of the present utility model are directly applied to other occasions without improvement, they are all within the protection scope of the present utility model.

Claims

1. A brazed diamond hole drill, characterized in that: The drill shaft comprises a drill shaft and a diamond coated on the shaft body at the top of the drill shaft, wherein the covering length of the diamond is L1, wherein the wall thickness of the drill shaft is T, the top of the drill shaft is inclined, the inclined length is L2, the inclination angle is a, and an inclined surface is provided at the inclined end of the top of the drill shaft, the width of the inclined surface is T1, ranging from 45% to 60% of the wall thickness T, and the inclination of the inclined surface to the horizontal plane is b, and its value is between 40° and 60°.

2. A brazed diamond hole drill according to claim 1, characterized in that: The particle size of the diamond is 40-60 mesh.

3. The brazed diamond hole drill according to claim 1, characterized in that: The wall thickness T ranges from 0.4 to 2.0 mm.

4. The brazed diamond hole drill according to claim 1, characterized in that: The inclined length L2 is 5 to 10 mm.

5. The brazed diamond hole drill according to claim 1, characterized in that: The range of L1 is: 3 to 40 mm.

6. The brazed diamond hole drill according to claim 1, characterized in that: The range of the inclination angle a is 10° to 30°.

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