PCBN blade with tree-shaped chip breaker groove

A chip breaker and blade technology, which is applied to tools used in lathes, accessories of toolholders, turning equipment, etc., can solve the problems of machining surface quality, poor chip breaking effect, and easy chip entanglement that affect machining efficiency. Achieving good chip breaking effect, overcoming chip breaking difficulties and reducing cutting resistance

Pending Publication Date: 2020-04-14
XIAMEN GOLDEN EGRET SPECIAL ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The PCBN inserts in the prior art, regardless of the above-mentioned structural forms, have very simple groove structures, most of which are flat groove structures, or just form a simple "V"-shaped chip breaking through the grinding process Groove, can not set a three-dimensional complex chip breaking groove with specific functions like cemented carbide inserts
This feature makes the chips not easy to be broken when the PCBN insert is processing hard-to-break materials, causing the chips to be easily entangled on the workpiece to be processed. The poor chip breaking effect directly affects its processing efficiency and the quality of the machined surface.

Method used

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  • PCBN blade with tree-shaped chip breaker groove
  • PCBN blade with tree-shaped chip breaker groove
  • PCBN blade with tree-shaped chip breaker groove

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] see Figure 1 to Figure 4 As shown, a PCBN insert with a tree-like chip breaker of the present invention includes a insert body 1, and the contour projection of the insert body 1 is roughly polygonal in shape; The screw fastening hole 2 on the lower surface 12, and the screw fastening hole 2 is in the roughly middle position; at least one corner position corresponding to the roughly polygonal shape of the blade body 1 is provided with a cutting portion 3 made of PCBN material; The cutting part 3 includes a cutting edge 31 corresponding to the top corner and side cutting edges 32 on both sides of the cutting edge, and a tree-shaped chip breaker formed by laser processing extending from the cutting edge to the screw fastening hole. Slot 4. The tree-shaped chip breaker 4 of the present invention is formed by laser processing, and compared with the traditional press-formed carbide structure groove, it has better physical and mechanical properties, longer tool life, and bet...

Embodiment 2

[0042] see Figure 5 As shown, a PCBN insert with a tree-shaped chip breaker of the present invention is different from Embodiment 1 in that the insert body 1 is composed of an upper layer of PCBN material layer 13 and a lower layer of cemented carbide material layer 14 As a result, there are only two layers of structure; the cutting part 3 is arranged at the corresponding corner position of the upper layer 13 of the blade body. The invention belongs to a single-sided blade, which has only two processing positions and is generally economical, but it can bear relatively large cutting and load, the blade has good installation stability, and is suitable for rough machining.

Embodiment 3

[0044] see Image 6 As shown, a PCBN insert with a tree-shaped chip breaker of the present invention is different from Embodiment 1 in that the insert body 1 is made of integral PCBN material, and the cutting part 3 is arranged on the insert body The corresponding corner positions of the upper surface and\or lower surface of . The present invention can be a single-sided blade or a double-sided blade. The present invention does not need high-temperature and high-pressure sintering process, and the PCBN wool material is directly made into a PCBN blade with a tree-shaped chip breaker through grinding and laser processing. The chip breaker can be placed on one of the surfaces of the wool material or With upper and lower surfaces, the PCBN insert can realize rough, fine and semi-finish processing in different working conditions, with a wide range of processing.

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PUM

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Abstract

The invention discloses a PCBN blade with a tree-shaped chip breaker groove. The blade comprises a blade body, wherein the outline projection of the blade body is approximately polygonal, a screw fastening hole penetrating through an upper surface and a lower surface is formed in the thickness direction of the blade body, the screw fastening hole is approximately located in the middle, a cutting part made of the PCBN (Polycrystalline Cubic Boron Nitride) material is arranged at at least one corner position corresponding to the approximately polygonal shape of the blade body, the cutting part comprises a tool nose cutting edge corresponding to a vertex angle, side cutting edges on two sides of the tool nose cutting edge, and the tree-shaped chip breaker groove which extends from the cuttingedges to the screw fastening hole and is formed through laser machining. The blade is advantaged in that the blade is provided with the chip breaker groove for breaking scrap iron, so the blade is ensured to have the good chip breaking effect in the machining process, and further has good wear resistance and machining stability.

Description

technical field [0001] The invention relates to a cutting insert, in particular to a PCBN insert with a tree-like chip breaker. Background technique [0002] Polycrystalline cubic boron nitride PCBN (Polycrystalline Cubic Boron Nitride) is a superhard material. The hardness of polycrystalline cubic boron nitride is very high, reaching 2700-5000HV, second only to the hardness of diamond; the bending strength and fracture toughness are between Between cemented carbide and ceramics; thermal stability is much higher than that of artificial diamond, it can still be cut at 1300°C, has high oxidation resistance, does not produce oxidation at 1000°C, and the chemical inertness of iron is also far greater For artificial diamond, it is not easy to chemically interact with iron-based materials at high temperatures of 1200 to 1300 ° C. Therefore, cubic boron nitride, as a superhard tool material, can be used for processing gray cast iron, ductile iron, etc., especially for processing ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B27/14
CPCB23B27/143
Inventor 祝泉水何耿煌李凌祥彭仕昌赵喆陈潇杰林文坤张昌荣
Owner XIAMEN GOLDEN EGRET SPECIAL ALLOY
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