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Method and apparatus for upsetting cylindrical material

A processing method and induction heating device technology, applied in metal processing equipment, engine components, mechanical equipment, etc., can solve problems such as 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

[0008] That is, since the cylindrical blank has a hollow portion inside, a part of the blank is likely to be bent inward or outward (bending) during upsetting, resulting in a shape defect.

Method used

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  • Method and apparatus for upsetting cylindrical material
  • Method and apparatus for upsetting cylindrical material
  • Method and apparatus for upsetting cylindrical material

Examples

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Embodiment

[0623] Next, specific examples of the present invention are shown below. However, this invention is not limited to the form shown in this Example.

[0624] A cylindrical blank 1 composed of an extrusion is prepared. The blank 1 has an inner diameter of 30 mm, an outer diameter of 40 mm, and a wall thickness of 5 mm. The length of each part to be processed 2 of the blank 1 is 120 mm. The material of the blank 1 is an aluminum alloy whose alloy number is A6061 prescribed by JIS (Japanese Industrial Standards).

[0625] In Example 1, using the upsetting apparatus 1F of the sixth embodiment described above, the blank 1 was subjected to upsetting by the same method as the upsetting method described in the sixth embodiment above. Then, the molding pressure required at this time was investigated. The results are shown in Table 1.

[0626] In Example 2, using the upsetting apparatus 1D of the above-mentioned fourth embodiment, the blank 1 was subjected to upsetting by the same me...

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Abstract

A method and a device for upsetting a cylindrical material capable of securely swelling the intended part of the cylindrical material to the inside or outside so that its wall thickness can be increased. A core (40) is disposed in the hollow parts (2a) and (3a) of the intended part (2) and the unintended part (3) of the cylindrical material (1). The unintended part (3) of the material (1) is disposed in the arresting hole (11) of an arresting die (10). The intended part (2) of the material (1) is disposed in a molding recessed part (12). The intended part (2) of the material (1) is disposed in the insertion hole (21) of a guide (20). Next, while the intended part (2) of the material (1) is pressurized in the axial direction with a punch (30), the guide (20) is moved in an opposite direction (25) to the moving direction (35) of the punch to swell the work predicted part (2) of the material (1) to the outside so that its wall thickness is increased in the molding recessed part (12).

Description

technical field [0001] The present invention relates to an upsetting method and an upsetting apparatus for a cylindrical blank in which a predetermined portion of a cylindrical blank is increased in thickness to bulge inwardly or outwardly. Background technique [0002] In general, upsetting is a process of expanding the diameter of a portion to be processed of a rod-shaped blank by applying pressure in the axial direction. In such an upsetting process, when the part to be processed of the blank is longitudinally bent during processing, the resulting product (upset processed product) has a shape defect (wrinkle, interlayer, etc.), and its value as a product is lost. Then, in order to prevent longitudinal bending of the portion to be processed, the following upsetting processing method is conventionally known. [0003] That is to say, the method is: fix the blank on the fixed mold, and insert the part to be processed of the blank into the insertion hole provided on the guide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/08B21K1/10
CPCB21J5/08
Inventor 大泷笃史
Owner SHOWA DENKO KK
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