Machining method for valve disc of regulating valve

A processing method and technology of regulating valves, which are applied in the field of processing of regulating valve discs, can solve problems such as poor quality of regulating valve discs, and achieve the effect of ensuring processing quality

Inactive Publication Date: 2018-09-11
HARBIN TURBINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem of poor quality of the valve disc of the regulating

Method used

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  • Machining method for valve disc of regulating valve
  • Machining method for valve disc of regulating valve
  • Machining method for valve disc of regulating valve

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0024] Specific implementation mode one: as Figure 1 to Figure 4 As shown, the processing method of a regulating valve disc in this embodiment is carried out in the following steps:

[0025] 1. Select a forging with a material of 2Cr12NiMo1W1V, and forge the forging at a temperature of 1000-1150°C for 4-6 hours to obtain a blank;

[0026] 2. Select a horizontal lathe, select the carbide turning tool of YG8 material as the cutting tool, and rough the inner hole, outer circle and end face of the rough turning blank. The workpiece after turning; the cutting parameters are: speed 150r / min, feed rate 0.15mm / r, cutting depth 1mm;

[0027] 3. Carry out tempering and stress-relief treatment on the workpiece after rough turning obtained in step 2, heat it at a temperature of 500-650°C for 2-3 hours, then keep it warm for 2 hours, and finally air-cool it to 200-300°C with the furnace to obtain Processed parts after heat treatment;

[0028] 4. Select a horizontal lathe, choose the ca...

specific Embodiment approach 2

[0038] Embodiment 2: This embodiment is different from Embodiment 1 in that: in Step 1, the forging is forged at a temperature of 1100°C. Others are the same as the first embodiment.

specific Embodiment approach 3

[0039] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the time in step 1 is 5 hours. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a machining method for a valve disc of a regulating valve and relates to a machining method for a valve disc of a regulating valve. The problem that the quality of valve discsof regulating valves is poor through existing processes is solved. The method comprises the steps that firstly, a blank is forged; secondly, an inner hole and an outer circle are turned roughly; thirdly, tempering stress relief treatment is conducted; fourthly, all parts of a machined part subjected to heat treatment is turned finely; fifthly, a groove is machined; sixthly, drilling is conducted;seventhly, tinning is conducted; eighthly, a quasi-inner hole and a quasi-outer circle are turned; ninthly, nitriding treatment is conducted; and tenthly, a quasi 4-11/4-8 UN screw hole is drilled bya bench worker, a quasi phi 17.48, phi 35 hole is drilled, a 4-phi 6 hole is drilled, and machining of the valve disc of the regulating valve is completed. The method is used for preparing the valve disc of the regulating valve.

Description

technical field [0001] The invention relates to a processing method for a regulating valve disc. Background technique [0002] The control valve is one of the components of the steam turbine unit, and the valve disc is a component of the control valve. The closing operation of the control valve is performed by pressing the R curved surface of the valve disc. The valve disc is a thin-walled part, and the inner hole and outer circle require Nitriding surface hardening treatment, preventing deformation during processing of the valve disc and ensuring the hardness of the nitrided layer on the inner and outer circles are processing difficulties. In order to ensure the processing quality and precision of this part, a processing method for the valve disc of the regulating valve has been developed. Contents of the invention [0003] The invention aims to solve the problem of poor quality of the valve disc of the regulating valve processed by the existing technology, and provides a...

Claims

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Application Information

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IPC IPC(8): B23P15/00
CPCB23P15/001
Inventor 孙盛丽王伟孙海珉魏成双赵祎昕刘剑姜秀英岳云淼
Owner HARBIN TURBINE
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