Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Pancake Forging Forging Method

A technology of forgings and pancakes, applied in the direction of metal processing equipment, etc., can solve the problems of astonishing economic loss and high scrap rate, and achieve the effects of improving design efficiency, improving mechanical properties, and shortening time

Active Publication Date: 2017-07-28
SINOSTEEL XINGTAI MACHINERY & MILL ROLL
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The scrap rate of pancake forgings is high, usually reaching 30% to 50%, and the economic loss is very alarming

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Pancake Forging Forging Method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] An existing forging is made of 20MnMoNb ingot type of 30 tons, and the size of the formed forging is φ1875mm×245 mm. First, determine the shape of the rotary upsetting forging by Deform computer simulation. The reduction amount is 18-20%, and the anvil width ratio is 0.6-0.7; the forging process of this forging is divided into 4 fires, and the operation content of each fire is as follows :

[0035] For the first fire, heat the forgings to 1200℃ and release them, pressing and chamfering;

[0036] For the second fire, return the forging to the furnace and heat it to 1200°C and then take it out. Transfer to the forging upsetting to φ=1900mm, then draw the square to 950mm×950mm, chamfer and round to φ=950mm; cut the tail Cutting diameter φ=950mm height H=960mm;

[0037] For the third fire, return the forging to the furnace and heat it to 1200℃, then transfer it to the forging platform, first upset it on the forging platform to φ=1360mm, H=480mm, and then transfer to the rotary f...

Embodiment 2

[0040] The existing forging material is 30Cr2NiMo, the ingot type is 60 tons, and the size of the forming forging is φ2780mm×350mm. First, determine the shape of the rotary upsetting forging by Deform computer simulation. The reduction amount is 18-20%, and the anvil width ratio is 0.6-0.7; the forging process of this forging needs to be carried out in 5 fires, and the operation content of each fire as follows:

[0041] For the first fire, heat the forgings to 1200℃ and release them, pressing and chamfering;

[0042] For the second fire, return the forgings to the furnace and heat them to 1200°C and then take them out, then transfer to the forging and upsetting to φ=2100mm, then draw the square to 1200mm×1200mm, and chamfer and round to φ=1200mm; cut the tail Cutting diameter φ=1200mm height H=2050mm;

[0043] For the third fire, return the forging to the furnace and heat it to 1200℃, then transfer to the forging platform, first upset the forging platform to φ=1900mm, H=800mm, and ...

Embodiment 3

[0047] The existing forging material is 20Mn, the ingot type is 8 tons, and the size of the formed forging is φ1020mm×210mm. First, determine the shape of the rotary upsetting forging by Deform computer simulation. The reduction amount is 18-20%, and the anvil width ratio is 0.6-0.7; the forging process of this forging is divided into 4 fires, and the operation content of each fire is as follows :

[0048] For the first fire, heat the forgings to 1200℃ and release them, pressing and chamfering;

[0049] For the second fire, return the forgings to the furnace and heat them to 1200°C and then take them out, then transfer to the forging upsetting to φ=1100mm, then draw the square to 550mm×550mm, and chamfer and round to φ=550mm; cut the tail Cutting diameter φ=550mm height H=850mm;

[0050] For the third fire, return the forgings to the furnace and heat them to 1200℃, then transfer to the forging platform, first upset the forging platform to φ=800mm, H=400mm, and then transfer to the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
diameteraaaaaaaaaa
heightaaaaaaaaaa
Login to View More

Abstract

The invention discloses a pancake forged piece forging method, and relates to the technical field of forging. Particularly, a pancake forged piece is forged by adopting a rotary upsetting method. The diameter Phi of the formed forged piece is 950-2,800 mm; the forging is conducted by a 8,000 t oil press; the rolling reduction, the anvil-width ratio and the needed heating number in rotary upsetting are obtained through simulation of a Deform computer; and the forging method comprises the following specific processes: at first, pressing and chamfering the forged piece; then upsetting and drawing square, chamfering again and rounding, and cutting the tail and discharging; and conducting rotary upsetting on the forged piece, and at last, smoothly downwards pressing the forged piece on a forging platform to conduct forging forming. The stress-strain distribution of the pancake forged piece finished product is uniform by adopting the rotary upsetting method, internal defects are reduced, the rate of flaw detection of a workpiece is improved greatly, and the mechanical property of the forged piece is improved.

Description

Technical field [0001] The invention relates to a forging method for pancake forgings, in particular to forging pancake forgings using a rotary upsetting method, and belongs to the technical field of forging. Background technique [0002] RST effect (Rigid Slide Tearing Effect, rigid sliding tearing effect) is the internal laminar crack defect produced after large-scale pancake and plate free forgings undergo a large amount of deformation during the forging process. It is caused by a special mechanics. Caused by the effect. Pancake forgings are generally produced by the direct upsetting method after blanking. The RST effect is likely to cause flaw detection during upsetting, and it is difficult to guarantee the performance of the product. Large-area and dense defects in the forgings are the main quality problems of pancake forgings. The scrap rate of wafer forgings is relatively high, usually reaching 30% to 50%, and the economic loss is very alarming. Summary of the invention...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/00B21J1/06
CPCB21J1/06B21J5/008
Inventor 王永军李俊
Owner SINOSTEEL XINGTAI MACHINERY & MILL ROLL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com