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Forging and forming method of two-piece flange connection ball valve cover blank

A connecting ball and two-piece technology, applied in the direction of valve devices, metal processing equipment, etc., can solve the problems of easy bending of the workpiece, poor stability of the workpiece, and unreasonable design, so as to improve the forging coaxiality and high coaxiality , the effect of convenient operation

Active Publication Date: 2020-04-03
四川弘信能源装备制造有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the stem of the workpiece after pre-forging is longer (length of the stem: diameter of the stem ≥ 2.5), it directly enters the final forging die, the stability of the workpiece is poor, and the workpiece after forging is prone to bending
At the same time, due to the unreasonable design of the existing pre-forging die and final forging die, there are often waste products due to out-of-tolerance coaxiality errors, large subsequent processing allowances, large material consumption, and high machining costs

Method used

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  • Forging and forming method of two-piece flange connection ball valve cover blank
  • Forging and forming method of two-piece flange connection ball valve cover blank
  • Forging and forming method of two-piece flange connection ball valve cover blank

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Embodiment Construction

[0032] Below by embodiment and in conjunction with accompanying drawing, the present invention will be further described:

[0033] Such as figure 2 Shown, a kind of two-piece flange connection ball valve bonnet blank forging forming method comprises the following steps:

[0034] The first step: blanking, heating to forging temperature;

[0035] In the first step, it is best to use a band saw to cut the bar to ensure that the saw seam is straight; use an induction heater to heat it to 1150 ° C ~ 1250 ° C with natural gas as fuel.

[0036] Step 2: Form one end flange and shallow hole in the pre-forging die.

[0037] Such as image 3 As shown, the blocker is mainly composed of the lower blocker die 9, the centering sleeve 10 and the first punch 11.

[0038] The lower pre-forging die 9 has a vertically through "T" cavity, and the centering sleeve 10 and the first punch 11 are arranged coaxially with the lower pre-forging die 9 . The bottom of the centering sleeve 10 has a fi...

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Abstract

The invention discloses a forging forming method for valve cover blank of a two-piece type flange connecting ball valve. The forging forming method comprises the following steps: a first step of unloading and heating to a forging temperature, a second step of forming an end flange and a shallow hole in a pre-forging mould, a third step of firstly collecting materials in a final-forging mould assembly, and forming another end flange and a punching hole; and a fourth step of punching the wad. The process method is convenient in operation, is simple in mould structure, is low in cost, has relatively high coaxiality guarantee compared with a general tire mould forging method, completely avoids waste as a result of ultra-poor coaxiality errors, is wide in applicable equipment, is used on most of forging equipment such as an air hammer and a forging hydraulic press, and is especially suitable for producing small-batch multi-specification products.

Description

technical field [0001] The invention relates to a metal plastic forming process in the technical field of material processing, in particular to a forging forming method for a blank of a two-piece flanged ball valve cover. Background technique [0002] As a common component on pressure pipelines, ball valve bonnets are widely used in petroleum, chemical and other technical fields. Ball valve bonnets are usually made of forged blanks and then machined. figure 1 Shown is a two-piece flanged ball valve bonnet with flanges at both ends, with a shallow hole at one end and a deep hole at the other end. The forging die is divided into a pre-forging die and a final forging die. The pre-forging is used for upsetting the flange at one end, and the final forging is used for upsetting the flange at the other end and punching holes. The shallow holes are completed by subsequent machining. [0003] Because the stem of the workpiece after pre-forging is longer (length of the stem: diamete...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21K1/20B21J5/00
Inventor 周亚夫吴克成杨柳
Owner 四川弘信能源装备制造有限公司
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