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Method and arrangement for manufacturing cutting inserts

A technology for cutting inserts and equipment, applied in the field of layout equipment for manufacturing cutting inserts, can solve problems such as changes in the density distribution of tangential insert blanks, no high dimensional precision through holes, etc., and achieve the effects of low porosity and long operating life

Active Publication Date: 2018-06-26
SANDVIK INTELLECTUAL PROPERTY AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem involved in the manufacture of tangential blades is that the non-parallel arrangement of the core rods with respect to the main punching direction causes the density distribution in the tangential blade blank to vary around the through hole
However, the method of US6986866 B2 does not provide a high dimensional accuracy of the through hole in the sintered cutting insert due to the difficulty in predicting and matching the deformation of the through hole with the shape of the mandrel

Method used

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  • Method and arrangement for manufacturing cutting inserts
  • Method and arrangement for manufacturing cutting inserts
  • Method and arrangement for manufacturing cutting inserts

Examples

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Embodiment Construction

[0031] figure 1 An arrangement device 100 for carrying out the method of the invention is shown. The arrangement device comprises a stamping tool 20 comprising a die 11 forming a circumferential wall 17 around a die cavity 12 extending through the die 11 . The mold cavity is continuous, ie open, at both ends. The punching tool 20 also includes a first punch 13 and a second punch 14 . The punches 13 and 14 are arranged opposite each other and are movable towards and away from each other along a first punching axis A extending through the center of the die cavity 12 and the first punch 13 and the second punch 14 center of. The punches 13 and 14 are arranged such that they can be moved towards each other within the die cavity 12 to compact the powder into the cutting insert blank. The first upper punch 13 is also arranged such that it can be moved away from the die cavity 12 to allow filling of the die cavity with powder or to allow removal of the cutting insert blank from th...

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Abstract

A method for manufacturing a cutting insert (1) having a through-hole (9) which extends in a direction which is non-parallel to the main pressing direction, comprising the steps of: - moving first and second punches (13, 14) within a die cavity (12) toward each other along a first pressing axis (A) to compact a powder around a core rod (15) into a cutting insert green body; wherein, during at least a portion of the compaction step, the core rod (15) is turned a predetermined angle in alternating direction around its longitudinal axis (B).

Description

technical field [0001] The invention relates to a method for manufacturing a cutting insert. The invention also relates to an arrangement device for producing cutting inserts. Background technique [0002] Cutting inserts are metal cutting tools for machining metals by milling, drilling or turning or by similar chip-forming methods. Cutting inserts are produced by powder metallurgy methods from metal powders (for example including mixtures of tungsten carbide and cobalt, such as cemented carbide powders) or from ceramic powders (for example including mixtures of aluminum oxide, silicon nitride and silicon carbide). Cutting inserts may also be manufactured from cermets (for example from a mixture comprising titanium carbide and nickel) or other materials such as eg cBN material. The powder is compacted into a cutting insert blank in the die cavity by the opposed first and second punches. After compaction, the cutting insert blank is removed from the mold cavity and subject...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/28B22F3/16B22F5/00
CPCB22F3/03B22F5/10B22F2003/031B22F2005/001B22F2005/103B30B11/007B30B11/027C22C29/08B22F3/16B23B27/00B22F3/12B23B27/1662B23B2200/3618B23B2205/04B23B2228/00
Inventor 亚尔马·斯塔夫
Owner SANDVIK INTELLECTUAL PROPERTY AB