Upsetting method and upsetting apparatus

A processing method and an induction heating device technology, which are applied in the field of upsetting processing and upsetting processing devices, and can solve problems such as product value loss and poor shape

Inactive Publication Date: 2008-01-23
SHOWA DENKO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this upsetting process, if the blank is longitudinally bent during processing, the obtained product (upset pr

Method used

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  • Upsetting method and upsetting apparatus
  • Upsetting method and upsetting apparatus
  • Upsetting method and upsetting apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0505] Next, specific examples of the present invention are shown below. However, the present invention is not limited to the cases shown in this example.

[0506] Prepare a round bar-shaped blank 1 made of continuous casting and rolling parts with a diameter equivalent to 12 mm and a round bar-shaped blank 1 made of extrusions with a diameter of 12 mm produced by the Propezer aluminum wire continuous casting and rolling method . The material of each blank 1 is aluminum alloy of alloy number A6061 in accordance with J1S (Japanese Industrial Standards). Then, these blanks 1 are subjected to upsetting using the upsetting apparatus 10C of the third embodiment described above. Next, the average forming pressure required at that time was investigated. The results are shown in Table 1.

[0507] Table 1

[0508] Types of blanks

way to heat up

heating temperature

cool down

Forming pressure

Example 1

Rolled parts

local heating

500℃...

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PUM

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Abstract

A upsetting method and an upsetting device capable of efficiently increasing the diameter of a bar-like material at at least two positions. In the method, a plurality of guides (31) and (32) having insertion holes (34) are prepared, and the bar-like material (1) fixed to a fixed die (20) is inserted into the insertion holes (34) of the plurality of guides (31) and (32) in order and held therein. Next, while the material (1) is axially pressed by a punch (50R), the plurality of guides (31) and (32) are integrally moved in a direction opposite to the moving direction of the punch (50R) in a mutually fitted state to increase the diameter of the first exposed part (4) of the material (1) exposed between the first guide (31) disposed on the forefront among the plurality of guides (31) and (32) and the fixed die (20). After the first guide (31) is moved, the second guide (32) disposed on the rear side of the first guide (31) among the plurality of guides (31) and (32) is moved in the direction opposite to the moving direction of the punch (50R) to increase the diameter of the second exposed part of the material (1) exposed between the both guides (31) and (32).

Description

technical field [0001] The present invention relates to an upsetting method and an upsetting device for expanding the diameter of two or more parts of a bar-shaped blank. Background technique [0002] In general, upsetting is to press a bar-shaped blank in the axial direction to expand the diameter of a predetermined portion of the blank. In this upsetting process, if the blank is longitudinally bent during the process, the obtained product (forged product) will have a shape defect (wrinkle, interlayer, etc.), and its value as a product will be impaired. Then, in order to make longitudinal bending difficult to occur, the following upset forging method has been known conventionally. [0003] That is, the method is as follows. The blank is fixed to the fixed mold, and the blank is inserted into the insertion hole provided on the guide body to maintain the blank in a longitudinal bending prevention state. Next, by punching the blank in the axial direction with a punch, the g...

Claims

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Application Information

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IPC IPC(8): B21J5/08B21K1/10
CPCB21J5/08
Inventor 大泷笃史
Owner SHOWA DENKO KK
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