Press forming method, method for manufacturing press-formed component and method for determining preform shape used in these methods
First Claim
1. A method for press forming a product having a shape of a top board portion, a vertical wall portion continuously formed from the top board portion and a flange portion continuously formed from the vertical wall portion in a press process of two or more stages, the method comprising:
- preforming a convex or concave bead shape at a position of a flat metal sheet as a raw material corresponding to at least one of the top board portion and the vertical wall portion of the product shape when the flat metal sheet is formed into the product shape, andthereafter, press forming the product shape from the metal sheet having the preformed bead shape, while feeding the material of the metal sheet from the preformed bead shape outwardly relative to a center of the metal sheet during the press forming.
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Accused Products
Abstract
A method is provided for press forming a product having a shape of a top board portion, a vertical wall portion continuously formed from the top board portion and a flange portion continuously formed from the vertical wall portion at a press process of two or more stages, wherein a convex or concave bead shape is preformed in a position of a flat metal sheet as a raw material corresponding to a neighborhood of a position generating breakage or flange wrinkles when the raw material is formed into a product shape, and thereafter a product shape is press formed from the raw material having the preformed bead shape.
10 Citations
8 Claims
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1. A method for press forming a product having a shape of a top board portion, a vertical wall portion continuously formed from the top board portion and a flange portion continuously formed from the vertical wall portion in a press process of two or more stages, the method comprising:
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preforming a convex or concave bead shape at a position of a flat metal sheet as a raw material corresponding to at least one of the top board portion and the vertical wall portion of the product shape when the flat metal sheet is formed into the product shape, and thereafter, press forming the product shape from the metal sheet having the preformed bead shape, while feeding the material of the metal sheet from the preformed bead shape outwardly relative to a center of the metal sheet during the press forming. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification