Processing method for ultraprecise turning of die steel material by adopting diamond cutter

A technology of a diamond tool and a processing method, which is applied in the field of microstructure optical mold production, can solve problems such as cutting failure and diamond tool wear, and achieve the effects of improving wear resistance, prolonging service life, and increasing economic benefits.

Inactive Publication Date: 2012-07-25
HARBIN INST OF TECH +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing thermochemical interaction between diamond and mold steel material causes the diamond tool to wear out rapidly, leading to the failure of cutting process, and then to provide a process for ultra-precision turning of mold steel material with diamond tool method

Method used

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  • Processing method for ultraprecise turning of die steel material by adopting diamond cutter
  • Processing method for ultraprecise turning of die steel material by adopting diamond cutter
  • Processing method for ultraprecise turning of die steel material by adopting diamond cutter

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specific Embodiment approach 1

[0012] Specific implementation mode one: combine Figure 1-Figure 6 Describe this embodiment, the process of the processing method of ultra-precision turning die steel material of this embodiment is as follows:

[0013] Step 1: Carry out conventional quenching and tempering treatment on the workpiece of the mold steel material, so that the hardness of the workpiece of the mold steel material reaches 26HRC-32HRC, and then pretreat the surface of the workpiece of the mold steel material, and the surface of the workpiece of the mold steel material after pretreatment Roughness Ra is less than 1μm, parallelism is less than 2μm;

[0014] Step 2: Perform plasma nitriding treatment on the workpiece surface of the mold steel material, add rare earth infiltrating agent, the volume percentage of nitrogen, hydrogen, and rare earth infiltrating agent is 20%: 60%: 20%, and the nitriding temperature is 540-580°C , the holding time is 4-8 hours, the furnace pressure is 650Pa, and the voltage...

specific Embodiment approach 2

[0022] Specific implementation mode two: combination figure 1 and figure 2 To illustrate this embodiment, in step 1 of this embodiment, the hardness of the workpiece of the mold steel material after quenching and tempering treatment reaches 28HRC-30HRC. The workpiece of such hardness die steel material facilitates the pretreatment of the workpiece surface of die steel material. Other method steps are the same as those in the first embodiment.

specific Embodiment approach 3

[0023] Specific implementation mode three: combination figure 1 and figure 2 This embodiment will be described. In this embodiment, the nitriding temperature during the plasma nitriding treatment is 560° C., and the holding time is 5-6 hours. Such nitriding temperature and holding time make the thickness of the nitriding layer 60 μm-80 μm. At this time, the iron atoms and nitrogen atoms in the nitriding layer can achieve the most sufficient combination, reducing the chemical reaction between the iron atoms and the carbon atoms in the diamond. The probability and the probability of the carbon atoms in the diamond diffusing to the workpiece material, thereby achieving the purpose of inhibiting the rapid wear of the tool. Other method steps are the same as those in the first embodiment.

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Abstract

The invention relates to a processing method for the ultraprecise turning of a die steel material by adopting a diamond cutter, relating to a processing method of a die steel material and aiming to solve the problems of rapid diamond cutter wearing and cutting and turning failures because of thermochemical action between the traditional diamond and the die steel material. The processing method comprises the following steps of: hardening and tempering a workpiece and then preprocessing; nitriding the surface of the workpiece and adding a rare-earth permeation agent, wherein the nitriding temperature is 540-580 DEG C, the hold time lasts for 4-8 h, the furnace pressure is 650 Pa and the voltage is 650 V; turning and preprocessing the surface of the workpiece made of the die steel material by adopting the diamond cutter with an arc radius of 3 mm; confirming the parameters of the diamond cutter; and carrying out the ultraprecise turning and processing to the nitrided workpiece with diamond, clamping the workpiece on a lathe spindle, fixedly mounting the diamond cutter on a tool apron and processing the workpiece made of the die steel material with the diamond cutter through the compound motion of a Z-direction guide rail and an X-direction guide rail. The processing method provided by the invention is suitable for processing the die steel material.

Description

technical field [0001] The invention relates to a processing method of a die steel material, in particular to a processing method for ultra-precision turning of a die steel material with a diamond tool, and belongs to the field of microstructure optical die manufacture. Background technique [0002] At present, the processing technologies of micro-optical molds with continuous relief structure characteristics on mold steel materials mainly include: MEMS technology, including photolithography technology, etching technology, deposition and image etching technology, LIGA technology, etc.; energy-assisted processing technology, mainly Including laser direct writing, ion beam direct writing, electron beam direct writing, electric discharge machining, micro-ultrasonic machining, etc.; micro-grinding wheel forming grinding technology, etc. MEMS technology and energy-assisted processing technology have lower requirements on parts materials, and can realize the processing of micron a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23B1/00
Inventor 赵清亮王义龙谢大纲郭兵房小艳赵玲玲
Owner HARBIN INST OF TECH
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