Method for producing highly dimensionally accurate half-shells and apparatus for producing a half-shell

US10065229B2 · kind B2 · utility

Assignee

• ThyssenKrupp Steel Europe AG · DE

Inventors

• Thomas Flehmig · Ratingen, DE
• Konstantinos Savvas · Mülheim an der Ruhr, DE
• Michael Brüggenbrock · Rosendahl, DE
• Jörg Gorschlüter · Hamm, DE

Key dates

• Filing date: Apr 8, 2014
• Grant date: Sep 4, 2018
• Expiry date: Jan 20, 2035

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B21D22/30
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a method for producing highly dimensionally accurate half-shells from a tailored blank, wherein, in a first die, with optional use of at least one hold-down means, the half-shell is subjected to pre-shaping by deep drawing, wherein the first die has at least one punch, a die base, a die rest surface and a jacket region, and wherein the pre-shaped half-shell is subsequently subjected to final shaping in a second die, in particular in a calibration tool. The object of specifying a method which simplifies the production of highly dimensionally accurate half-shells is achieved in that, before the deep drawing, the blank is tailored by cutting, taking into consideration the desired final shape of the pre-shaped and/or finally shaped half-shell, with a positive dimensional deviation in the predefined tolerance range, the die base of the first die is moved relative to the die rest surface, the blank is clamped between the die base and the punch of the first die, and the blank is deep-drawn in a guided manner.