CN105945188A

CN105945188A - Loose tooling forging technology for large-size inner hole step forging piece

Info

Publication number: CN105945188A
Application number: CN201610454923.3A
Authority: CN
Inventors: 吕美莲; 刘春超; 冯宝倪; 吕俊; 吕诚
Original assignee: Auspicious Outstanding Co Ltd Of Forging Of Anhui Province
Current assignee: Auspicious Outstanding Co Ltd Of Forging Of Anhui Province
Priority date: 2016-06-20
Filing date: 2016-06-20
Publication date: 2016-09-21

Abstract

The invention discloses a loose tooling forging technology for a large-size inner hole step forging piece. The loose tooling forging technology for the large-size inner hole step forging piece comprises the following steps: (1) the first fire, heavy pressing and upsetting-stretching of a blank: upsetting vertical materials by an upper flat felt and a lower flat felt; (2) the second fire, forming: stretching the blank with a uniform anvil and a core rod; (3) the third fire, forming in a mould: putting the stretched blank into the mould for forming. The shape and the size of the forging piece are ensured by the mould and unrelated to the skill of a forger, so that the technology is low in skill requirement of the forger, convenient to operate and high in production efficiency; the loose tooling forging is accurate in shape and high in size accuracy, so that the accessorial blocks of the technology are few and the machining allowance is small; metal can be saved and the working capacity of the subsequent machining can be reduced; the loose tooling forging piece is formed in the loose tooling forging mould, so that the tissue of the interior of the forging piece is compact and the arrangement of the fiber can meet the property requirements better. The loose tooling forging is applicable to the small or medium batch production and usually used for the factories of small and medium sizes without die forging equipment.

Description

Large-scale endoporus step forging fetal membrane Forging Technology

Technical field

The present invention relates to Forging Technology, be specifically related to large-scale endoporus step forging fetal membrane Forging Technology.

Background technology

Along with the fast development of open die forging industry, fetal membrane forging is also arisen at the historic moment, and loose tooling forging is to set at open die forging Single thorax mould of the standby entitled fetal membrane of upper use produces the process of forging, and loose tooling forging typically uses open die forging pre- Forging base, then finally shapes in loose tool.But owing to production process is numerous and diverse, use core bar drawing freely Forging waste of raw materials is the biggest.

Summary of the invention

For solving technical problem described in background technology, the present invention by the following technical solutions: large-scale endoporus platform Rank forging fetal membrane Forging Technology, it comprises the following steps:

1) the first fire weight upsetting pull blank, uses upper and lower flat anvil to carry out vertical material jumping-up, two-sided punching control, upset ratio >=2.0, initial forging temperature controls at 1000-1220 DEG C, and final forging temperature controls at 700-900 DEG C；

2) the second pyrogene type, uses neat anvil and plug to pull out blank, and initial forging temperature controls 1100-1200 DEG C, final forging temperature controls at 600-800 DEG C；

3) the 3rd fire in-mold molding；The blank of pulling is put into die for molding, and initial forging temperature controls 1100-1300 DEG C, final forging temperature controls at 600-900 DEG C；

4) put in storage through the conformance with standard regulation that examines the forged pieces.

Preferably, step 3) in mould need to preheat in advance 200-250 DEG C, and smear lubricant.

The invention has the beneficial effects as follows: the shape and size of loose tool forging are the most unrelated with forger technology, pattern has Ensureing, less demanding to workman's technology, easy and simple to handle, production efficiency is high；The shape of loose tool forging is accurate, Dimensional accuracy is higher, thus more than technique, block is few, allowance is little；Save metal, alleviate following process Workload；Loose tool forging is in-molded at tire, forging dense internal organization, and fiber distribution more meets performance Requirement.During loose tooling forging is applicable to, small lot batch manufacture, be used in the middle-size and small-size factory not having forging equipment more.

Detailed description of the invention

Large-scale endoporus step forging fetal membrane Forging Technology, it comprises the following steps:

1) the first fire weight upsetting pull blank, uses upper and lower flat anvil to carry out vertical material jumping-up, two-sided punching control, upset ratio >=2.0, initial forging temperature controls at 1000 DEG C, and final forging temperature controls at 700 DEG C；

2) the second pyrogene type, uses neat anvil and plug to pull out blank, and initial forging temperature controls at 1200 DEG C, Final forging temperature controls at 800 DEG C；

3) the 3rd fire in-mold molding；The blank of pulling is put into die for molding, and initial forging temperature controls 1300 DEG C, final forging temperature controls at 900 DEG C；

Embodiment two

1) the first fire weight upsetting pull blank, uses upper and lower flat anvil to carry out vertical material jumping-up, two-sided punching control, upset ratio >=2.0, initial forging temperature controls at 1220 DEG C, and final forging temperature controls at 900 DEG C；

Embodiment three

1) the first fire weight upsetting pull blank, uses upper and lower flat anvil to carry out vertical material jumping-up, two-sided punching control, upset ratio >=2.0, initial forging temperature controls at 1100 DEG C, and final forging temperature controls at 800 DEG C；

3) the 3rd fire in-mold molding；The blank of pulling is put into die for molding, and initial forging temperature controls 1200 DEG C, final forging temperature controls at 800 DEG C；

Claims

The most large-scale endoporus step forging fetal membrane Forging Technology, it is characterised in that it comprises the following steps:

1) the first fire weight upsetting pull blank, uses upper and lower flat anvil to carry out vertical material jumping-up, two-sided punching control, upset ratio >=2.0, initial forging temperature controls at 1000-1220 DEG C, and final forging temperature controls at 700-900 DEG C；

2) the second pyrogene type, uses neat anvil and plug to pull out blank, and initial forging temperature controls 1100-1200 DEG C, final forging temperature controls at 600-800 DEG C；

3) the 3rd fire in-mold molding；The blank of pulling is put into die for molding, and initial forging temperature controls 1100-1300 DEG C, final forging temperature controls at 600-900 DEG C；

4) put in storage through the conformance with standard regulation that examines the forged pieces.
Large-scale endoporus step forging fetal membrane Forging Technology the most according to claim 1, it is characterised in that Step 3) in mould need to preheat in advance 200-250 DEG C, and smear lubricant.