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A long valve body punching and drawing elongation forging process

A punching and valve body technology, applied in valve devices, metal processing equipment, etc., can solve the problems of difficult machining, scrapped products, insufficient allowance, etc., to reduce the processing cost and processing cycle, improve the tightness, and prolong the use. effect of life

Active Publication Date: 2019-05-10
JIANGYIN NANGONG FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problems to be solved by the present invention are as follows: firstly, to reduce the cost and improve the market competitiveness; secondly, the central hole of the square body punching forging is easily deformed into an ellipse or an irregular rhombus, resulting in difficulty in machining or insufficient margin, resulting in product scrapping

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  • A long valve body punching and drawing elongation forging process

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Embodiment 1

[0027] The long valve body punching and drawing elongation forging process of the present invention, wherein:

[0028] 1. The billet should be as high as possible to reduce the elongated length of the blank, and the mandrel should be removed in time during the elongation process to prevent the mandrel from being deformed due to high temperature and unable to pull out the mandrel;

[0029] 2. Improvement of tooling: a) To make the head punch, the outer diameter of the head punch should be larger, so that the second punch can be put in;

[0030] b) Make the second stroke, and the middle transition is elongated;

[0031] c) Make a long mandrel for forming, and finally use it for elongation and finishing.

[0032] Specifically include the following steps:

[0033] against figure 1 The billet, blanking: 13200kg; this batch of forging steel ingot head size 1105mm / tail size 1000mm, ingot body 1940mm long octagonal ingot.

[0034] S1: Heat the billet to 1220°C, keep it warm for ...

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Abstract

A long valve body punching, elongating, and forging process comprising the following steps: heating a blank to 1220°C, thermally insulating for 9 hours, using an upper flatbed and a lower turntable for primary upsetting, primary elongating, and secondary upsetting of the blank to 1320 mm × 1040 mm and 1200 mm in height, and returning to a furnace; using a die punch for punching, flipping, using the die punch for punching through and cutting off a core material, and returning to the furnace; using secondary punching for elongating to 1450 mm in length, withdrawing the punching die after shaping, and returning to the furnace; using a shaping core rod for elongating to position, and finishing a square body for forming. The forging process increases the tightness of the core portion of a product, extends the service life of the product, and reduces processing costs and processing cycles.

Description

technical field [0001] The invention relates to the technical field, in particular to a long valve body punching and drawing elongation forging process. Background technique [0002] Long body blanks (eg figure 1 As shown), the length exceeds the width and thickness by a lot. This type of valve body is punched out into a square. Due to the long length, subsequent drawing is required to ensure the size of the forging. However, the central hole of the forging is easily deformed into an ellipse or irregular shape after drawing. The rhombus shape not only fails to save materials, but also leads to difficulty in machining, waste of man-hours and tools, and even the product is scrapped due to insufficient margin due to too much deformation of the inner hole. The square and the middle hole are machined out through subsequent machining. [0003] The above-mentioned conventional forging schemes all have large machining allowances and high processing costs (the inner hole needs to b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21K1/24B21J5/00B21J5/06B21J5/08B21J5/10
CPCB21J5/00B21J5/06B21J5/08B21J5/10B21K1/24
Inventor 高欣高明邱亚军高汝峰
Owner JIANGYIN NANGONG FORGING