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Polycrystalline diamond bit and manufacturing method thereof

A technology of polycrystalline diamond and drill bits, which is used in the manufacture of tools, twist drills, metal processing equipment, etc., can solve the problems of unsuitable processing or drilling, and achieve the effect of compact structure

Active Publication Date: 2016-12-07
JUNTEC ULTRA HARD TOOLS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of drill bit is not suitable, for example, for the processing (such as drilling) of the above-mentioned hard non-metallic materials or non-ferrous metals that require precise processing dimensions, and it is also not suitable for processing or drilling smaller diameter holes.

Method used

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  • Polycrystalline diamond bit and manufacturing method thereof
  • Polycrystalline diamond bit and manufacturing method thereof
  • Polycrystalline diamond bit and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment Construction

[0023] figure 1 Shown is a front view of one embodiment of a polycrystalline diamond (PCD) drill comprising a cemented carbide body 1 and an insert 2 secured to the end of the body, which in this embodiment consists of two pieces of PCD The composite sheets are spliced ​​together, as detailed below. The drill bit defines a working rotary axis O-O', the cutter body 1 extends along the working rotary axis O-O' and the drill bit rotates around the working rotary axis O-O' during work, and at the same time figure 1 The axial feed is performed in the left direction as shown, so that the insert 2 (specifically, the cutting edge of the insert) is used as the cutting structure to drill a hole or form a required hole surface in the workpiece to be processed. As shown, the drill also defines a drill working diameter D that corresponds to the diameter of the corresponding hole formed in the workpiece being machined. Specifically, the working diameter D of the drill bit is defined by th...

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Abstract

The invention provides a drill bit which rotates around a rotation axis. The drill bit comprises a rigid knife body and a blade. A cross blade edge which tilts towards the first side face and the second side face of the blade seen from the plane perpendicular to the rotation axis is arranged at the tail end of the blade. The blade comprises a first polycrystalline diamond blade portion and a second polycrystalline diamond blade portion, wherein the first polycrystalline diamond blade portion and the second polycrystalline diamond blade portion are formed by laminating a polycrystalline diamond layer and a hard alloy layer. A spliced interface (9) is defined by the first polycrystalline diamond blade portion and the second polycrystalline diamond blade portion together, and the spliced interface (9) is arranged in the mode that the spliced interface does not intersect with the cross blade edge. A first fixed portion and a second fixed portion are defined in the first side face and the second side face respectively, and the first fixed portion and the second fixed portion are basically in rotational symmetry with the rotation axis as the symmetric axis seen from the plane perpendicular to the rotation axis. The invention further provides a manufacturing method of the drill bit.

Description

technical field [0001] The present invention relates to a polycrystalline diamond (PCD) drill bit. In addition, the present invention also relates to a method of manufacturing the polycrystalline diamond drill bit. Background technique [0002] As known in the art, a drill is a tool used to form a hole or to surface a hole. Therefore, it is generally hoped that the drill bit can stably guarantee a certain dimensional accuracy and surface roughness of the hole for a long time. Commonly used drill materials include solid carbide drills and high-speed steel drills. In some high-demand hole machining processes, solid carbide drills are now widely used. However, for some high-hardness, difficult-to-machine non-metallic materials (such as carbon fiber) and non-ferrous metal processing, it is desirable to provide a drill bit with higher strength, such as a drill bit made of polycrystalline diamond (PCD). [0003] However, the existing polycrystalline diamond drill bit is usuall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23B51/02B23P15/32B23K1/008
CPCB23B51/02B23P5/00B23P15/32
Inventor 刘敏
Owner JUNTEC ULTRA HARD TOOLS CO LTD
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