CN105618652A

CN105618652A - Forging punch for machining deep blind hole through static pressure impact method

Info

Publication number: CN105618652A
Application number: CN201410604089.2A
Authority: CN
Inventors: 徐杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-11-03
Filing date: 2014-11-03
Publication date: 2016-06-01

Abstract

The invention discloses a forging technique for machining a deep blind hole through a static pressure impact method and relates to forging production techniques. Due to the fact that the static pressure impact method is used for forging, the periphery of a punch is an oblique plane inclining by 8-10 degrees. Due to the fact that the static pressure impact method is used for forging, after the punch stretches deep into a metal body and particularly when a molding bed is formed, it is difficult to loosen the punch, a shallow hole is needs to be punched through the punch firstly at the moment, and the punch also needs to be inclined by 8-10 degrees when retracted; the shallow hole is filled with pulverized coal or glass powder, and then a blind hole is punched to the technologically-required depth through the punch; after unloading, due to the fact that the pulverized coal or the glass powder in the hole is evaporated under high-temperature and high-pressure condition, the punch is pushed out through the pulverized coal or the glass powder which is evaporated at the high pressure once unloading is conducted, and disengagement of the punch is facilitated due to the fact that both the pulverized coal and the glass powder has a lubricating function. By the adoption of the forging technique, production is convenient, labor is saved, the forming performance is good, and the utilization rate of a workpiece can be increased.

Description

A kind of forging drift of static pressure type ballistic method processing deep blind-hole

Technical field

The present invention relates to forging production technique, particularly the impact forging production technical field to the deep blind hole of metalwork.

Background technology

Forging is the common technology of metalwork preliminarily forming, processing generally for shallow bore hole, macropore has no problem substantially, but man-hour is added for deep blind hole, after drift pours red heat metallic object, it is flushed to and reaches certain depth, metal temperature can decline, and temperature reduces certainly will cause metal shrinkage, will hold drift after metal shrinkage tightly. Therefore for the processing of this type, how drift exits encounters stubborn problem.

Summary of the invention

The present invention seeks to propose the forging drift of a kind of static pressure type ballistic method processing deep blind-hole making drift can exit metal forging smoothly.

The present invention is characterized as being: be have the inclined-plane of 8��10 �� in drift periphery.

Owing to being the forging of static pressure type ballistic method, drift go deep into after metallic object especially socket form moulding time, drift is difficult to get loose, at this moment first a shallow bore hole should be rushed with drift, exit drift, drift also must make 8-10 �� of gradient, coal dust or glass dust is filled in shallow bore hole, then add drift again and rush blind hole to the technological requirement degree of depth, after unloading, owing to the coal dust in hole or glass dust are vaporized at high temperature under high pressure, once unloading, the coal dust of high-pressure vaporization or glass dust will release drift, and coal dust, glass dust at high temperature have lubrication to be conducive to drift to deviate from.

The present invention is convenient to be produced, laborsaving, and forming can improve the utilization rate of workpiece.

Detailed description of the invention

Design forging process: chamfered edge, pulling, jumping-up, pulling, socket form moulding, static pressure rush deep blind hole.

Forge weight 3100Kg, forging temperature 1260 DEG C��750 DEG C, adopt 11T(EF+LF+VD) one forging of steel ingot three.

Forging operation detailed process:

By designing requirement sawing, remove Steel ingot feeder head, bottom rejected material, single-piece material weight 3250Kg.

Steel billet is come out of the stove after 1230��1260 DEG C of soaks, and chamfered edge, pulling, to �� 650mm, are melted down.

Steel billet reenters stove heating, comes out of the stove after 1230-1260 DEG C of soak, and jumping-up is to �� 1000mm, and then pulling is to �� 650mm, then melts down.

The assembling die assembled is placed on forging press mobile working platform, adopts static pressure to rush deep blind hole technique.

Steel billet is come out of the stove after 1230-1260 DEG C of soak, inserts in mould interstitial hole after removing billet surface oxide skin.

On forging press, anvil moves down upsetting and presses close to mould upper surface, backhaul to hammering block, hangs on diameter and is slightly less than the round steel plug of �� 650mm, presses plug until metal is full of impression, backhaul under upper anvil.

Drift is produced the inclined-plane with 8��10 �� of gradients.

Hang out plug, hang on drift and first go out 50mm shallow bore hole.

After exiting drift, in shallow bore hole, fill up coal dust or glass dust.

Rush the blind hole 80mm degree of depth to technological requirement so that drift is quiet again, shed the load on drift.

Drift is pushed out by coal dust or the glass dust of vaporization from deep hole, obtains the forging of deep blind hole.

After testing: steel ingot utilization rate 87.2%.

Claims

1. the forging drift of a static pressure type ballistic method processing deep blind-hole, it is characterised in that: it is that there is the inclined-plane of 8��10 �� in drift periphery.