Press molding device and manufacturing method thereof

Inactive Publication Date: 2020-11-05
UNIPRES CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

The patent text describes a new invention that has specific features. However, the text also mentions that the invention can also be a combination of these features. The technical effect is that the invention has certain features that make it useful in a specific field.

Problems solved by technology

However, depending on a shape of the work piece, it is sometimes difficult to provide the flow path to the forming die.

Method used

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  • Press molding device and manufacturing method thereof
  • Press molding device and manufacturing method thereof
  • Press molding device and manufacturing method thereof

Examples

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Embodiment Construction

[0024]Hereinafter, the present invention will be described through the embodiments of the invention, but the following embodiments do not limit the invention according to the claims. Moreover, not necessarily all combinations of features described in the embodiments are essential to the solution of the invention.

[0025]In a hot stamp molding (also referred to as hot press molding, PHS or the like), one possible solution is to cool the press-molded article to have an strength equivalent to 1500 MPa, and then cut thus cooled press-molded article. However, a portion of the press-molded article that has been cooled and then cut has a high strength (hardness) and residual stress, and thus, there is a possibility that a delayed fracture occurs. In order to prevent such delayed fracture, it is considered to cut the work piece in the high temperature condition before being cooled. As a result, the strength (hardness) and the residual stress of the press-molded article are lowered, and thus, ...

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PUM

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Abstract

A press molding device includes a first die for supporting the work piece and a second die arranged to face the first die. The first die includes a punch including a first molding surface for molding the work piece and a blank holder that is movably arranged along a side surface that extends from the first molding surface of the punch and includes the supporting surface for supporting the end portion of the work piece. The second die includes the die portion that includes the second molding surface that faces the first molding surface and is used for molding the work piece and the trimming portion configured integrally with the die portion. The trimming portion includes the blade portion for cutting the end portion of the work piece. The die portion includes a flow path for circulating a refrigerant to cool the work piece along the second molding surface.

Description

[0001]The contents of the following PCT application are incorporated herein by reference: PCT / JP2018 / 030347.BACKGROUND1. Technical Field[0002]The present invention relates to a press molding device and a manufacturing method thereof.2. Related Art[0003]Non-Patent Document 1 discloses a manufacturing method which presses and molds a heated work piece while cooling the heated work piece and then cuts an end portion of the work piece by lowering a trim die. The above-described manufacturing method requires, to prevent the trim die from moving ahead of a pad during molding, to provide a reaction force generation devices such as hydraulic tanker and hydraulic pressure generation device for controlling the hydraulic tanker in a metallic die. Patent Document 1 discloses providing a regulation portion for regulating a posture of the work piece in the trim die and a blank holder so that the work piece does not contact a punch side cutting edge and a die side cutting edge during press molding...

Claims

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Application Information

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IPC IPC(8): B21D22/20B21D24/16B21D24/04B21D37/16
CPCB21D37/16B21D24/04B21D24/16B21D22/20B21D22/208
Inventor SERIZAWA, TSUTOMUOHBUCHI, KOJIKIKAWA, TAMIYAMIAO, DIYUN
Owner UNIPRES CORP
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