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Rolling forging type forging manufacturing die and method

A technology for manufacturing dies and dies, which is applied in the design field of special dies, can solve the problems of uneven distribution of internal stress of forgings and high requirements for forging equipment, so as to improve the yield and performance, reduce production costs and reduce demand.

Inactive Publication Date: 2017-05-31
XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Purpose of the present invention: to propose a rolling and forging type forging manufacturing die and method to solve two problems in the traditional method of manufacturing, one is (super) large forgings require high capacity of forging equipment, the other is the forging method caused The problem of uneven distribution of internal stress in forgings

Method used

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  • Rolling forging type forging manufacturing die and method
  • Rolling forging type forging manufacturing die and method
  • Rolling forging type forging manufacturing die and method

Examples

Experimental program
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Embodiment 1

[0044] The invention relates to a rolling mechanism for a metal forging billet, which is composed of a group (or several groups) of upper and lower roller die sets which can be replaced and positioned. The cross-section of the upper and lower roll molds is circular, and the upper and lower roll molds are used to shape the shape of the part on the one hand, and to control the shape of the part on the other hand. There is a transmission shaft on the central axis of the upper and lower roll molds, and a transmission gear is installed on the transmission shaft. The roll groups are installed on the same vertical line, and the horizontal relative position is determined according to the compression rate required by the deformation of the forging billet. The rolls rotate in opposite directions and at the same speed. schematic diagram see figure 1 .

[0045] The mold group design method is as follows:

[0046] The die set includes transmission gear, upper roll die, lower roll die a...

Embodiment 2

[0052] The shape of the cross-section of the part is as Figure 5 , the aspect ratio is 8, and the longitudinal curvature is zero. Its mold design considerations are as follows.

[0053] The cross-section diameters of the upper and lower rollers are the same. Considering the overall rigidity of the conformal flange, the thickness of the flange can be appropriately thickened, especially for the part that is in contact with the part. The schematic diagram of the mold design is as follows: Figure 6 shown.

[0054] The mold design shape of upper and lower roll group is as follows Figure 6 shown.

[0055] Adjust the distance between the roll groups according to the thickness of the parts, and fix the roll groups. For the ratio comparison, see Figure 7shown. Through the connection between the transmission shaft and the gear, the rotational torque is obtained from the rolling forging machine. During operation, the upper and lower roll die sets rotate in reverse. The installa...

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Abstract

The invention relates to design of a special die and provides a rolling forging type forging manufacturing die and method. The die comprises at least one roller die set. Each roller die set comprises a drive gear, an upper roller die, a lower roller die and a shape-preserving flange. The drive gears are arranged on drive shafts of the upper roller dies and the lower roller dies, the shape-preserving flanges are installed at the two ends of the drive shafts of the upper roller dies or the lower roller dies, the inner sides of the peripheral protruding portions of the shape-preserving flanges are in contact with the working surfaces of the lower roller dies, and the outer sides of the peripheral protruding portions of the shape-preserving flanges are in contact with the working surfaces of the upper roller dies. Each roller die set is installed on the same vertical line, and the gaps between the lower ends of the upper roller dies and the upper ends of the lower roller dies are set according to the compression ratio needed by deformation of a forging stock. By means of the rolling forging type forging manufacturing die and method, the requirements of super-large forging production on large forging equipment are greatly lowered, and the production cost is reduced. Meanwhile, internal stress of forgings produced through the die and method is low and is evenly distributed, the yield of products is increased, and the use performance of the products is improved.

Description

technical field [0001] The invention belongs to the new forging technology of industrial forgings, and relates to the design of special dies. Background technique [0002] With the development of modern aircraft design concepts, the requirements for structural weight reduction, fatigue and damage performance are getting higher and higher. Due to the comparative advantages of the overall structure in this area, its design and use are becoming more and more widespread and common, and tend to be large , ultra-large, so the demand for large raw material blanks, especially large forgings that are widely used, is becoming more and more urgent. [0003] The principle of the existing forging method is to compress the ingot or forging billet through the hammer head or the pressure head, so as to cause the metal to undergo plastic deformation to achieve the purpose of forming. performance. Forging methods are divided into two basic methods: free forging and die forging. Large-scale...

Claims

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Application Information

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IPC IPC(8): B21B13/02B21B27/02
CPCB21B13/02B21B27/02
Inventor 张伟宋扬宋少鹏欧霞
Owner XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA