Carbon dioxide laser processing method and processing device for pcbn

A laser processing method, carbon dioxide technology, applied in metal processing equipment, laser welding equipment, manufacturing tools, etc., can solve the problems of low ultrasonic cutting efficiency, low cutting efficiency, poor processing quality, etc., to reduce the heat-affected zone and heavy The formation of the cast layer, the effect of improving efficiency and improving the roughness of the processed surface

A laser processing method, carbon dioxide technology, applied in metal processing equipment, laser welding equipment, manufacturing tools, etc., can solve the problems of low ultrasonic cutting efficiency, low cutting efficiency, poor processing quality, etc., to reduce the heat-affected zone and heavy The formation of the cast layer, the effect of improving efficiency and improving the roughness of the processed surface

CN108311795BActive Publication Date: 2020-05-29TIANJIN UNIV OF SCI & TECH
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  • Carbon dioxide laser processing method and processing device for pcbn
  • Carbon dioxide laser processing method and processing device for pcbn
  • Carbon dioxide laser processing method and processing device for pcbn

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and through specific embodiments. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

[0023] The present invention uses a carbon dioxide laser, and the structure of the laser head is as follows: figure 1 As shown, it includes the spray head 1, the rotating disk 2, the separation base 5 and the connection seat 6 which are connected coaxially in sequence. A laser through hole 4 is coaxially connected to the center of the spray head, the rotating disk and the separation base. The laser through hole It communicates with the laser through hole 7 of the connecting seat, and the rotating disk is connected with the separation base through the bearing 3 . A plurality of auxiliary gas inlet holes 8 are formed in the connecting seat, and the auxiliary gas inlet holes communicate with the laser t...

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Abstract

The invention relates to a carbon dioxide laser machining method of PCBN. The surface of a material is cut by utilizing laser, and the generated temperature gradient in the cutting process results inphase change of cubic boron nitride to hexagonal boron nitride, so that great thermal stress and internal stress are caused, and the material produces cracks and propagating cracks in the kerf direction. The machining method is totally different from the traditional laser machining principle; the PCBN laser cutting efficiency is improved effectively; and the forming areas of a heat-affected zone and a recasting layer of the material are reduced, and the roughness of the machined surface is improved.

Description

technical field [0001] The invention belongs to the field of processing hard and brittle materials, and relates to processing PCBN by laser, in particular to a carbon dioxide laser processing method and processing device for PCBN. Background technique [0002] Polycrystalline cubic boron nitride (Polycrystalline Cubic Boron Nitride) referred to as PCBN is another new type of superhard synthetic material after artificial diamond. PCBN is a cubic boron nitride single crystal with or without various binders (phases) and then processed Isotropic polycrystalline block formed by high temperature and high pressure polymerization and sintering. Due to its high hardness, diamond tools have always been of high application value in high-speed cutting, but their chemical properties are unstable, and they are prone to chemical reactions with iron and other metals to cause tool breakage, and the cost is relatively high. The hardness of PCBN is second only to diamond. Unlike diamond, its ...

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Application Information

Patent Timeline
29 May 2020
Publication
CN108311795B
IPC
B23K26/364; B23K26/12; B23K26/402; B23K101/20
CPC
B23K26/123; B23K26/364; B23K26/402
Inventors
赵静楠; 郭健