Forging method for warm-forging inner star wheel

A technology of inner star wheel and warm forging, applied in the field of forging, can solve the problems of large forming resistance, thick decarburized layer, large size change, etc., and achieve the effect of moderate forming resistance, clear metal flow line and stable forging pressure

Inactive Publication Date: 2014-03-26
SHANGHAI HUAYONG PRECISION MACHINERY
View PDF10 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, there are generally two types of forging for the inner star wheel: first, hot forging with a temperature greater than 950°C is used, but the surface is severely oxidized, the decarburization layer is thick, and the size changes greatly, which can only be achieved by normalizing heat treatment. Internal organizational structure; second, cold extrusion at room temperature has large forming resistance, easy to damage the mold, and requires multiple annealing, phosphorus saponification, high cost, large energy consumption, and serious pollution. These two methods are not conducive to modern industry development of

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] Below in conjunction with specific embodiment the present invention is described in further detail:

[0011] The present invention is realized through the following steps:

[0012] Heat the inner star wheel to 145°C-155°C;

[0013] The surface of the inner star wheel is sprayed with graphite to insulate its surface from the outside air;

[0014] After wind drying, enter the intermediate frequency furnace to heat up to 880°C-920°C; because the surface has a protective layer, there will be no oxidation reaction;

[0015] Enter the four-station forging area for forging; the four-station forging is followed by: shaping, rough forging, precision forging, punching;

[0016] The mechanical arm is used to transfer the parts, the production cycle is above 28 times / min, and the size is strictly controlled within 0.2mm to achieve the purpose of precision forging.

[0017] First, the surface of the blank is shot blasted, weighed and sorted; it enters the feeding mechanism, enter...

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 relates to a forging method for a warm-forging inner star wheel. The forging method comprises the following steps of heating the inner star wheel to be at 145-155 DEG C; spraying graphite on the surface of the inner star wheel to enable the surface to be isolated from outside air; feeding the inner star wheel into an intermediate frequency furnace and rising the temperature to be 880-920 DEG C after wind drying; feeding the inner star wheel into a four-station forging-pressing region to be subjected to forging and pressing, wherein the four-station forging and pressing step sequentially includes reshaping operation, rough forging operation, finish forging and forming operation and punching operation. The forging method for the warm-forging inner star wheel has the advantages that the temperature is constant, the time is uniform, the working conditions are consistent, and the surface is provided with a protective layer, so that forging-pressing pressure is stable in the forging process, the forming resistance is moderate, finally the size is stable, the part surfaces are clean and almost free of oxidation and decarburization, the internal organization grain size reaches to the level 7, and metal streamlines are clear and smooth.

Description

technical field [0001] The invention relates to a forging method, in particular to a forging method of a warm forging inner star wheel. Background technique [0002] In the prior art, there are generally two types of forging for the inner star wheel: first, hot forging with a temperature greater than 950°C is used, but the surface is severely oxidized, the decarburization layer is thick, and the size changes greatly, which can only be achieved by normalizing heat treatment. Internal organizational structure; second, cold extrusion at room temperature has large forming resistance, easy to damage the mold, and requires multiple annealing, phosphorus saponification, high cost, large energy consumption, and serious pollution. These two methods are not conducive to modern industry development of. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a forging method of a warm forging inner star wheel, aiming at solving the...

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): B21K1/28
Inventor 王建国顾继鑫
Owner SHANGHAI HUAYONG PRECISION MACHINERY
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