Forging method of valve cover part of valve

A technology for bonnets and parts, applied in valve devices, metal processing equipment, etc., can solve problems such as difficult to meet standard requirements, unreliable product performance, low material utilization rate, etc., achieve high production efficiency, save machining troubles, The effect of smooth product flow

Active Publication Date: 2013-03-20
DALIAN DAGAO VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High production costs, low material utilization, unreliable product performance, and difficult to meet standard requirements

Method used

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  • Forging method of valve cover part of valve
  • Forging method of valve cover part of valve
  • Forging method of valve cover part of valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for forging valve cover parts, the working process of which is:

[0033] 1. Selection of blank: the diameter of the blank is Ф60mm;

[0034] 2. Heating: Medium frequency induction electric heating is adopted, the heating time is 24S, and the blank heating temperature is controlled at 1150°C;

[0035] 3. Billet making: Use a 750Kg air hammer at 1150°C to make a billet using a billet mold;

[0036] 4. Pre-forging: Pre-forging with a 1600t press at 1150°C using a pre-forging die;

[0037] 5. Final forging: Use a 1600t press at 1000°C to use a final forging die for final forging;

[0038] 6. Trimming: Trimming with J31-315 press at 800°C using a trimming mold;

[0039] 7. Punching: Use a J31-315 press at 800°C to punch with a punching die;

[0040] 8. Calibration: Calibrate with a 300t press at 800°C using a calibration mold;

[0041] 10. Heat treatment;

[0042] 11. Sanding: use shot blasting machine to sand;

[0043] 12. The finished product is obtained th...

Embodiment 2

[0045] A method for forging valve cover parts, the working process of which is:

[0046] 1. Selection of blank: the diameter of the blank is Ф60mm.

[0047] 2. Heating: medium frequency induction electric heating is adopted, the heating time is 24S, and the blank heating temperature is controlled at 1100°C;

[0048] 3. Billet making: Use a 750Kg air hammer to make billets at 1100°C using a billet mold;

[0049] 4. Pre-forging: Pre-forging with a 1600t press at 1100°C using a pre-forging die;

[0050] 5. Final forging: Use a 1600t press at 1050°C to use a final forging die for final forging;

[0051] 6. Trimming: Trimming with J31-315 press at 850°C using a trimming mold;

[0052] 7. Punching: Use a J31-315 press at 850°C to punch with a punching die;

[0053] 8. Calibration: Calibrate with a 300t press at 850°C using a calibration mold;

[0054] 10. Heat treatment;

[0055] 11. Sanding: use shot blasting machine to sand;

[0056] 12. The finished product is obtained...

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Abstract

The invention relates to the forging technic of valve covers, in particular to a forging method of a valve cover of a valve, and belongs to the field of mechanical processing. Through a way of forging forming, the requirements on boundary dimension of products can be met at one time, a trouble of machining is left out, production efficiency is high, streamlines of the products are smooth, standard requirements on performance are completely met, and appearance is attractive.

Description

[0001] A kind of forging method of valve cover parts technical field [0002] The invention relates to a forging technology of a valve cover, in particular to a forging method of a valve cover part of a valve, which belongs to the field of mechanical processing. Background technique [0003] The development of China's nuclear-grade valves started in the early 1960s. Since my country's self-designed and developed Qinshan Phase I 300MW pressurized water reactor in 1985, Qinshan Phase I, Daya Bay, and Qinshan Phase I have been built successively through self-designed and developed, and introduction of foreign technology. Six nuclear power plants, including Phase II, Qinshan Phase III, and Lingao and Tianwan, have a total installed capacity of 8.7 million kW, accounting for about 2% of the country's total power generation capacity, and form three nuclear power bases in Qinshan, Zhejiang, Daya Bay, Guangdong, and Tianwan, Jiangsu. The two sets of units in Daya Bay, Guangdong Prov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K1/20B21J5/02
Inventor 纪长全白玉昌孔繁磊
Owner DALIAN DAGAO VALVE
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