Process for forging and forming welding neck flanges for connecting pipelines

A high-neck flange and forging forming technology, applied in the field of flange forging, can solve the problems of inability to realize automatic continuous production, blank ellipse and uneven margin, and inability to guarantee product consistency, etc., achieving low cost and high production efficiency , The effect of reducing machining time

Inactive Publication Date: 2021-03-12
SHANDONG IRAETA HEAVY IND
View PDF9 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The shortcomings of the above two forging methods for flanges are: the margin control is relatively extensive, and the forming mold is not completely closed, the final blank has ellipse and uneven margin, and the consistency of the product cannot be guaranteed, and the overall time-consuming It needs to be long, it can't realize automatic continuous production, and it can't solve the problem of labor force

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
  • Process for forging and forming welding neck flanges for connecting pipelines
  • Process for forging and forming welding neck flanges for connecting pipelines
  • Process for forging and forming welding neck flanges for connecting pipelines

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A process for forging and forming high-neck flanges used in pipeline connections, comprising the following steps: blanking, heating, preforming, forming, and punching;

[0032] Among them, when cutting the material, the raw material is sawed by a circular saw; the advantage is that the sawing surface of the circular saw is smooth and smooth, and the consistency of each piece of material is high, which guarantees the subsequent molding;

[0033] Then use an intermediate frequency furnace to heat the billet. After the billet is heated to 1230°C, first use a 1000T electric screw press to preform the billet, upsetting the cylindrical billet into a cake shape, and then put the upset billet upside down into the forming mold. closed molding;

[0034] Then use a 2500T electric screw press forming die to fill the neck with the punch, and use a 315T closed single-point punch to punch holes to cut off the skin and blank.

[0035] The 1000T electric screw press and the 2500T elect...

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

No PUM Login to view more

Abstract

The invention belongs to the technical field of forging of flanges and particularly relates to a process for forging and forming welding neck flanges for connecting pipelines. The process comprises the following steps: blanking, heating, preforming, forming and punching. An intermediate frequency furnace is used for heating blanks; the blanks are firstly preformed and upset into cake shapes afterbeing heated, and then the upset blanks are inversely placed into a forming die and are closed and formed; in the preforming process, a 1000T electric screw press is used for preforming and upsettingcylindrical blanks; then a neck part of a 2500T electric screw press forming die is filled by a punch; and 315T closed single-point punching is used for cutting off the connected skin and blanking. The process has the beneficial effects that accurate discharging is achieved after allowance is added to the finished product; the sizes of the forged products are uniform and controllable; stable batchproduction is realized; the production efficiency is improved; in addition, the effects of saving the cost and reducing the time consumption are achieved; and the the economic benefit is increased.

Description

technical field [0001] The invention belongs to the technical field of flange forging, and in particular relates to a process for forming a high neck flange used for pipeline connection. Background technique [0002] At present, the high-neck flanges for pipe connections are mostly formed in the form of pre-forging blank opening and hole expansion. After the final forging, the blank has a large margin and poor consistency, and the efficiency is low. It is impossible to save forging materials. Purpose, the follow-up machining increases the time and the amount of cutting tools. This kind of production cost is high, the efficiency is low and time-consuming, resulting in a relatively large amount of material, which not only increases the production cost, but also prolongs the follow-up processing time. [0003] Regarding the flange forging method, the following patent documents have been disclosed: [0004] CN110814264A discloses a flange forging process, which is characterized...

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 Applications(China)
IPC IPC(8): B21K1/32B21J1/06B21J1/04B21J5/00B21J5/02B21J5/08B21J5/10
CPCB21K1/32B21J1/06B21J1/04B21J5/002B21J5/022B21J5/08B21J5/10
Inventor 董云龙刘允良潘文东牛余兵张维全翟庆度臧超刘嘉震王政通牛秀丽
Owner SHANDONG IRAETA HEAVY IND
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap