Multidirectional precise die forging process for valve body with flange

A technology for precision die forging and flange valves, which is applied in the field of multi-directional precision die forging technology, can solve the problems affecting the quality of the valve body, inclusions, shrinkage, etc., and achieve excellent surface quality of forgings, good mechanical properties, and reduce overall costs. Effect

Inactive Publication Date: 2016-11-09
22MCC GRP PRECISION FORGING
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to overcome the deficiencies of the existing die forging process with flanged valve body, provide a multi-directional precision die forging process with flanged valve body, and solve the problem that the traditional welding process of valve body is complicated and the weld seam is easily affected. The quality of the valve body, the problems of air holes, inclusions, shrinkage porosity and cracks are easy to occur in the cast valve body

Method used

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  • Multidirectional precise die forging process for valve body with flange
  • Multidirectional precise die forging process for valve body with flange
  • Multidirectional precise die forging process for valve body with flange

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Embodiment 1

[0038] The specific implementation of the multi-directional precision die forging process with a flanged valve body provided by the present invention is as follows:

[0039] 1) Simufact computer software for numerical simulation. see figure 1 , according to the part pattern, combined with the numerical simulation technology to determine the pattern of the forging and the forming method of the forging.

[0040] Table 1: Main forging technical parameters of this embodiment

[0041] model

Billet diameter

Forging weight

Initial forging temperature

terminal temperature

Oxidation burn rate

50F-250

Φ150mm

76.2-76.8kg

1180℃

850℃

0.5%

[0042] 2) Blank preparation. According to the numerical simulation results, considering the oxidation burning loss and forging allowance, the billet specification is selected as 150mm*550mm.

[0043] 3) Blank heating. The medium frequency induction heating furnace is used for heating, and the...

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Abstract

The invention belongs to the technical field of machinery manufacturing and particularly discloses a multidirectional precise die forging process for a valve body with a flange. The forging process comprises the following steps of (1) computer numerical simulation, (2) blank preparation, (3) blank heating, (4) die preparation, (5) multidirectional precise die forging forming, (6) forge piece cooling, (7) nondestructive testing, and (8) forge piece shot blasting treatment. According to the multidirectional precise die forging process, one-fire once forging is adopted for forming the valve body forge piece which is complex in shape, with an inner hole, precise in dimension and is close to a fabricated part, continuity of the valve body forging streamline and good overall performance are ensured, thus the production efficiency is improved, materials are saved, and energy consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of mechanical manufacturing, in particular to a multi-directional precision die forging process with a flanged valve body. Background technique [0002] At present, high and medium pressure valves with flanges are widely used in petroleum and chemical system pipelines. The valve body is the main part of the valve, generally a forging. According to the "Wellhead Equipment and Christmas Tree Equipment Specifications" standard formulated by the American Petroleum Institute, petroleum valve bodies often need to work under high pressure, high corrosive gas, and high air tightness conditions, and the working conditions are harsh. [0003] The valve body with flange generally adopts the form of split forging, and then the valve body and the flange are butt jointed by welding, but the welding part is prone to defects, which affects the overall quality of the valve; some manufacturers also use step-by-step forging a...

Claims

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Application Information

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IPC IPC(8): B21J5/02B23P15/00
CPCB21J5/02B23P15/001
Inventor 宋昌哲赵文成杨宝仓
Owner 22MCC GRP PRECISION FORGING
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