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Rotary forging method for large disc type work piece and forging device

A rotary forging and rotary forging technology, used in forging/pressing/hammer devices, manufacturing tools, vehicle parts, etc., can solve the problems of large machining volume, low material utilization rate, high manufacturing cost, and achieve small stress and deformation. , The effect of reducing the amount of machining and manufacturing costs

Inactive Publication Date: 2012-05-23
XI AN JIAOTONG UNIV +1
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  • Claims
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AI Technical Summary

Problems solved by technology

The step-by-step rotary forging method can solve the problems of low material utilization rate, large amount of machining and high manufacturing cost in the machining and manufacturing of large disk parts (especially small batch production)

Method used

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  • Rotary forging method for large disc type work piece and forging device
  • Rotary forging method for large disc type work piece and forging device
  • Rotary forging method for large disc type work piece and forging device

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Embodiment Construction

[0027] The rotary forging method of the large disk type parts of the present invention specifically follows the steps: A. The design of the forging die makes the forging die consist of an upper forging die and a lower die, and the upper forging die is designed to be composed of one or more rectangular strips Shaped forging die assembly constitutes an axisymmetric structure, the lower profile of the vertical section of the rectangular strip-shaped forging die assembly is the same as the upper profile of the central section of the processed large-scale disc workpiece; B. blank preparation, pre-forging split Slot preparation of circular plates or round blanks (eg figure 1 a1 or b1) and heated to the initial forging temperature of the blank metal material; then adopt the integral die forging method to shape or the step-by-step rotary forging method to pre-forge the splitter groove 4 on the blank; then heat the pre-forging to the initial forging temperature; C. Positioning the blan...

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Abstract

The invention provides a rotary forging method for large disc type work pieces and a forging device. The method comprises preparing a forging die, preparing blanks, pre-forging a shunt slot, positioning the blanks and carrying out rotary forging in steps. Based on the method, the invention also provides a forging device which can realize relative rotation of an upper forging die and a lower die, and the local forming process for the disc type work pieces can be carried out through rotary forging of the upper forging die and the lower die. In order to control metal flow in the forging process, the procedure of pre-forging the shunt slot is added prior to the rotary forging. Moreover, the upper forging die with a special structure is adopted to overcome the warpage of the work pieces during rotary forging. The forming method has the advantages of low forming load, simple dies and low processing cost, and can greatly reduce the manufacturing cost of existing large disc type work pieces.

Description

technical field [0001] The invention belongs to the technical field of forging and forming, and relates to a forging method and a device, in particular to a step-by-step rotary forging method for large disk parts and a forging device for realizing the forging method. Background technique [0002] At present, large disk parts are mainly manufactured by mechanical processing, which has low material utilization rate, large amount of machining and long manufacturing time; in addition, large disk parts can also be manufactured by closed die forging method, die forging The required forming force is very large, and the requirements for equipment and molds are very high. For example, the inner diameter of the impeller disc for a certain type of centrifugal fan is 580mm, the outer diameter is 1180mm, the thickest part of the workpiece is 45mm, the thinnest part is 5mm, the workpiece weighs 83Kg, the blank for machining method weighs 702Kg, and the machining volume is 619Kg. The util...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21K1/32B21J5/02B21J13/02
CPCB21J5/008
Inventor 张琦赵升吨陶文琉叶长青乔社宁张海存
Owner XI AN JIAOTONG UNIV
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