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Method for processing pressure container forgeable piece

A technology of a pressure vessel and a processing method, which is applied in the field of forging processing, and can solve problems such as difficult compaction, low product qualification rate, and uneven deformation of blanks.

Active Publication Date: 2008-09-17
WUXI HONGDA HEAVY IND
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the forging process uses more firing times, the defects inside the steel ingot are not easy to compact, the internal deformation of the billet is uneven, dead zones are easy to occur, and the qualified rate of the product is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0007] The processing procedure of the pressure vessel forging is described below in conjunction with the examples:

[0008] For example, a pressure vessel with a diameter of 1410 mm and a height of 400 mm is processed. Calculate the weight according to the size of the pressure vessel forging, estimate the weight of the blank according to the weight, and determine the size of the blank according to the length of the blank H / diameter of the blank D≈2.25. , the unit is mm), according to the blanking diameter, it can be calculated that the anvil width is between 566-735, choose 700 mm, and calculate the time from blank forging to blanking according to the reduction amount of each pull length between 15% and 20%. After eight rounds of elongation and the minimum pier diameter of the blank is 1000 mm, the specific processing process is described below: the blank is heated in a heating furnace, and then the blank pier is thickened to a minimum diameter of 1000 mm; then heated, and th...

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Abstract

The invention relates to a machining method of pressure vessel forging pieces, which is characterized in that the following relationships must be met among the width of an anvil W0, a blanking diameter D, and a required minimum stretching diameter (stamping diameter) D0: the width of the anvil is equal to 0.77-1.0 by D, and the minimum stretching diameter (stamping diameter) D0 equals to 1.4 D by D / W0. The machining method is characterized in that the length H and diameter D of blanking are calculated according to the volume of a forming forging piece, H / D is approximately equal to 2.25, and the width of the anvil is selected according to the blanking diameter D; when stretching and casting the blanks, the percent reduction in each stretching ranges between 15 and 20%, and according to the percent reduction and minimal stretching times as well as forming numbers, the required minimal stretching diameter (stamping diameter) D0 can be determined; then the original blanks are stretched and turned to reach the blanking size for conducting blanking, subsequently, the blanked material is stamped to the required size, and finally, the processes of rounding and finishing are performed. The machining method has the advantages of reducing the forging duration to the maximal extent, effectively compacting the defects inside the steel ingots, and enjoying high pass rate of workpieces.

Description

technical field [0001] The invention relates to the technical field of forging processing, in particular to a processing method of a pressure vessel forging. Background technique [0002] At present, the production of forgings in the industry generally adopts several times of compaction and several times of elongation or direct elongation. And this forging process used fire time is more, and the defective of steel ingot interior is difficult for compacting, and blank internal deformation is uneven, easily produces dead zone, and the qualified rate of product is on the low side. Contents of the invention [0003] In view of the above problems, the present invention provides another processing method for pressure vessel forgings, which can minimize the number of forging fires, effectively compact defects inside the steel ingot, and have a high pass rate of workpieces. [0004] Technical scheme of the present invention is such: [0005] Anvil width W 0 , blanking diameter ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K21/00B21J5/00B21J5/08
Inventor 张瑞庆张忠明张卫东
Owner WUXI HONGDA HEAVY IND
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