Turning tool machining technology capable of reducing heat damage and improving tempering quality

A technology of tempering quality and processing technology, used in heat treatment furnaces, manufacturing tools, heat treatment equipment, etc., to achieve the effect of improving hardness and wear resistance, reducing heating deformation, and improving machinability

Inactive Publication Date: 2014-11-05
CHENGDU HENGTONG ZHAOYE PRECISION MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

How to further optimize the turning tool processing technology that can reduce thermal damage and improve tempering quality in the prior art is the key problem to further improve the quality of turning tools. The present invention provides a turning tool that can reduce thermal damage and improve tempering. Quality Turning Tooling Process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Turning tool processing technology that can reduce thermal damage and improve tempering quality, including sequential blanking, forging, cutting, heat treatment and grinding, the blank is W2MoCr4V2Co8 high-speed tool steel, and the heat treatment includes sequential Preheating, heating and heat preservation, quenching and tempering, an annealing step is also included between the forging and cutting, and the annealing step is to heat the forged blank step by step: that is, heating from normal temperature to 600-650°C without holding For less than 10 minutes, continue heating to 850-860°C for no less than 20 minutes and then cool slowly. The temperature rise rate of the above heating is not greater than 25°C / h. The tempering step consists of multiple single-step tempering, each single step Tempering means heating the blank obtained in the previous step to 500-550°C, holding it for no less than 0.8h, then air cooling or oil cooling, and the cooling rate of the air cooling a...

Embodiment 2

[0019] This embodiment is further limited on the basis of Embodiment 1. In order to prevent the oil stains on the blank from affecting the heat treatment during the machining process and affect the final quality of the product, a cleaning step is also included between the cutting process and the heat treatment. The cleaning step includes a degreasing cleaning process and a drying process carried out in sequence.

[0020] Further, the quenching and tempering also include sequential degreasing and cleaning processes, drying processes and inspection processes. The set inspection process is to check the quenching quality of the blank, such as the appearance of cracks and thermal deformation, and the observation of the uniformity of quenching, so as to avoid the blanks that do not meet the quality requirements from entering the next step of processing and wasting processing resources.

[0021] In order to prevent the blank from being oxidized during the cooling process and prevent ...

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PUM

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Abstract

The invention discloses a turning tool machining technology capable of reducing heat damage and improving tempering quality. The turning tool machining technology comprises the processes of blank blanking, forging, cutting, heat treatment and grinding in sequence. A blank is W2MoCr4V2Co8 high-speed tool steel. The heat treatment process includes preheating, heating and heat insulation, quenching and tempering in sequence. Preheating is conducted in a staged mode with the temperature gradually increased. An annealing step is further set between the forging step and the cutting step, and according to the annealing step, the forged blank is heated step by step. The turning tool machining technology is simple in circuit, the heat treatment effect is good, the hardness number of the turning tool can be more than 70 HRC, and the good wear resistance and the good heat hardness are achieved.

Description

technical field [0001] The invention relates to the field of lathe tool processing and manufacturing technology, in particular to a turning tool processing technology that can reduce thermal damage and improve tempering quality. Background technique [0002] In the machining industry the lathe is considered the working "mother machine" of all equipment. Lathes are mainly used to process shafts, discs, sleeves and other workpieces with rotating surfaces, mainly cylinders, and are the most widely used type of machine tools in machinery manufacturing and repair factories. Turning tools are used for turning and have a Cutting tool. Turning tool is one of the most widely used tools in cutting. [0003] With the development of modern manufacturing technology, high-speed steel turning tools are widely used in cutting. During use, the cutting part of the turning tool has to bear a lot of pressure, friction, impact and work at a higher temperature, which makes high-speed Steel tur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/30C21D1/26C21D9/22
CPCB23P15/30C21D1/26C21D9/22
Inventor 吴光武
Owner CHENGDU HENGTONG ZHAOYE PRECISION MACHINERY
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