Upsetting method and upsetting apparatus

A processing device and processing method technology, applied in metal processing equipment, engine components, mechanical equipment, etc., can solve problems such as damage to product value and poor shape

Inactive Publication Date: 2009-09-23
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 processed product) becomes defective in shape (wrinkled, sandwiched, etc.), and its value as a product is impaired

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

[0319] Next, specific examples of the present invention will be shown below. However, the present invention is not limited to the cases shown in this example.

[0320] 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 JIS (Japanese Industrial Standards). Then, these blanks 1 are roughed by using the upsetting apparatus 1D of the fourth embodiment described above. Next, the molding pressure required at that time was investigated. The results are shown in Table 1. In addition, the lengths of the diameter-expanding planned portions 2 of the blank 1 were all 200 mm.

[0321] Table 1

[0322] Types of blanks heating method heating temperature cool down F...

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PUM

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Abstract

A method and a device for upsetting capable of non-uniformly increasing the diameter of the unintended part of a material in the circumferential direction. The method comprises a step of preparing a guide (20) having an insertion hole (21) in which the unintended part (2) of the material (1) is inserted and held in a buckling prevented state. In the device, a projected part (22) for suppressing an increase in diameter projecting in the axial direction of the guide (20) is integrally formed at a part of the tip part (20a) of the guide (20). The method also comprises a step of holdingly inserting the intended part (2) of the material (1) fixed to a fixed die (10) into the insertion hole (21) of the guide (20) and, while axially pressurizing the intended part (2) of the material (1) with a punch (30) by moving the punch (30), moving the guide (20) in an opposite direction to the moving direction of the punch (30) to increase the diameter of the intended part (2) of the material (1) exposed between the tip part (20a) of the guide (20) and the fixed die (10) in the state of suppressing an increase in the diameter of the contact part of the intended part (2) with the projected piece part (22).

Description

technical field [0001] The present invention relates to an upsetting method and an upsetting device for expanding the diameter of a predetermined portion of a bar-shaped blank. Background technique [0002] In general, upsetting is to expand the diameter of a portion to be expanded in diameter by pressing a rod-shaped blank in the axial direction. 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 prevent longitudinal bending, the following upsetting method has been conventionally known. [0003] That is, in this method, the blank is fixed in a fixed mold, and the planned diameter-expanding portion of the blank is inserted into the insertion hole provided on the guide body to hold the planned-diameter-expanding portion in a longitudinal bending prevention state. Next, the guide body is mov...

Claims

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Application Information

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