Method of producing a sheet steel product such as a motor vehicle bumper beam in a progressive die system
AssigneeSSAB Hardtech AB
InventorMartin Johnson
Life of this patent
Estimating the term…
Abstract
A sheet steel blank is stamped and held in a pair of tools. The blank has holes that are collared by means of mandrels in connection with the forming. The collaring is carried out in the material. In this way, holes with very narrow tolerances can be achieved. Such holes in a bumper beam can be used for guiding the bumper beam during the mounting thereof on a vehicle.
Claims20
A method of producing a motor vehicle bumper beam from sheet steel using a progressive die system, said method comprising the steps of:
- forming a sheet metal blank from sheet steel to form a bumper beam;
- punching, with a plurality of punches, a plurality of holes in the sheet metal blank, of a predetermined size and configuration, for a plurality of collared holes to be formed in the sheet metal blank;
- moving the sheet metal blank to at least one stamping machine having a pair of dies configured to stamp the sheet metal blank and form a motor vehicle bumper beam;
- placing the sheet metal blank between the pair of dies configured to hold the sheet metal blank and configured to collar holes in the sheet metal blank;
- stamping the sheet metal blank;
- collaring the plurality of holes in the sheet metal blank and forming the motor vehicle bumper beam;
- and
- holding the formed motor vehicle bumper beam for a predetermined period of time between the pair of dies configured to form the motor vehicle bumper beam.
A method of producing a bumper beam for a motor vehicle from sheet steel using a die system, said method comprising the steps of:
- forming a sheet metal blank from sheet steel;
- forming at least one hole in the sheet metal blank, of a predetermined size and configuration, for at least one collared hole to be formed in the sheet metal blank;
- moving the sheet metal blank to at least one stamping machine having a pair of dies configured to stamp the sheet metal blank;
- stopping the sheet metal blank between the pair of dies configured to hold the sheet metal blank and configured to collar holes in the sheet metal blank;
- stamping the sheet metal blank, thus forming the bumper beam;
- collaring the at least one hole in the sheet metal blank;
- and
- holding the formed bumper beam between the pair of dies to cool and harden the bumper beam.
A method of producing a sheet metal product from sheet steel using a die system, said method comprising the steps of:
- forming a sheet metal blank from sheet steel to form a sheet metal product;
- forming at least one hole in the sheet metal blank, of a predetermined size and configuration, for at least one collared hole to be formed in the sheet metal blank;
- heating the sheet metal blank;
- moving the sheet metal blank to at least one stamping machine having a pair of dies configured to stamp the sheet metal blank and form the sheet metal product;
- stopping the sheet metal blank between the pair of dies configured to hold the sheet metal blank and configured to collar holes in the sheet metal blank;
- stamping the heated sheet metal blank;
- collaring the at least one hole in the heated sheet metal blank to produce the sheet metal product;
- forming the sheet metal product;
- and
- holding the formed sheet metal product for a predetermined period of time between the pair of dies configured to form the sheet metal product to harden the sheet metal product.
A method of producing a motor vehicle bumper beam from sheet steel using a progressive die system, said method comprising the steps of:
- forming a sheet metal blank from sheet steel;
- punching, with a plurality of punches, a plurality of holes in the sheet metal blank, of a predetermined size and configuration, for a plurality of collared holes to be formed in the sheet metal blank;
- heating the sheet metal blank;
- moving the sheet metal blank to at least one stamping machine having a pair of dies configured to stamp the sheet metal blank to form a motor vehicle bumper beam;
- placing the sheet metal blank between the pair of dies configured to hold the sheet metal blank and configured to collar holes in the sheet metal blank;
- stamping the sheet metal blank;
- collaring the plurality of holes in the sheet metal blank and forming the motor vehicle bumper beam;
- and
- holding the formed motor vehicle bumper beam for a predetermined period of time between the pair of dies to cool and harden the formed motor vehicle bumper beam.
Dependencies are inferred from the claim text.