| Patent application number | Description | Published |
|---|
| 20090038428 | Metal Member With Through Hole And Manufacturing Method Therefor - A structure and method are provided for forming a through hole at one portion of a side wall of an expanded portion made by plastically deforming one part of a metal tube radially outward, in a portion where the plate thickness gradually changes. A slide tool is withdrawn from inside a punch hole while applying hydraulic pressure to the inside of the side wall. Regarding a tip end face of the slide tool, a portion facing the portion of the side wall where the plate thickness is relatively thick is recessed. At the instant of commencing withdrawal of the slide tool, the degree of progress in the shearing for the portions of the side wall matching with the two side edges of the punch hole is made different. Then, the timing for moving from shearing to rupture is made to coincide, so that of the side wall, the portions matching with the punch hole, are made reliably into a blank, and are extracted from the side wall. | 02-12-2009 |
| 20100084892 | STRENGTH MEMBER FOR AN AUTOMOBILE BODY, FRONT SIDE MEMBER, AND SIDE STRUCTURE FOR AN AUTOMOBILE BODY - A strength member for an automobile body such as a side member or a pillar which has a bent portion which is bent two-dimensionally or three-dimensionally and which has an ultrahigh strength with a tensile strength exceeding 1100 MPa is provided. The strength member for an automobile body has a tubular body which has a closed cross section which does not have an outwardly-extending flange and which has a bent portion which is bent two-dimensionally or three-dimensionally, a portion to be cut or punched, and a portion to be welded. The tubular body has an ultrahigh strength heat-treated portion which has been heat treated to have a tensile strength exceeding 1100 MPa, a high strength heat-treated portion which is the remainder other than the ultrahigh strength heat-treated portion and which has been heat treated to have a tensile strength of at least 600 MPa and at most 1100 MPa, and/or a low strength heat-treated portion which is the portion to be cut or punched or the portion to be welded and which has been heat treated to have a tensile strength of less than 600 MPa. | 04-08-2010 |
| 20100088882 | METHOD OF MANUFACTURING A BENT PRODUCT AND AN APPARATUS AND A CONTINUOUS LINE FOR MANUFACTURING THE SAME - A method and apparatus for three-dimensionally bending a metal material are provided. A product intermittently having a bent portion which curves three-dimensionally and a quenched portion is manufactured by a bending method which performs bending downstream of a support means while feeding a metal material which is supported by the support means from an upstream side towards a downstream side. A portion of the metal material is heated by a heating means for the metal material downstream of the support means, a bending moment is imparted to the portion of the metal material which was heated by the heating means to carry out bending by three-dimensionally changing the position of a movable roller die which is disposed downstream of the heating means and has a plurality of rolls which feed the metal material which was heated by the heating means in the axial direction, and the metal material is quenched by spraying a cooling medium at the portion of the metal material which was heated by the heating means by a cooling means disposed between the heating means and the movable roller die. Errors in a product due to bending are suppressed by supporting a portion of the metal material which has exited from the movable roller die. | 04-15-2010 |
| 20100218577 | THREE-DIMENSIONALLY BENDING MACHINE, BENDING-EQUIPMENT LINE, AND BENT PRODUCT - A three-dimensionally bending machine comprises a supporting unit to support a workpiece and a feeding unit to feed the workpiece from an upstream side of the workpiece. A heating and cooling unit, provided around the outer circumference of a portion of the workpiece downstream of said supporting unit heats the portion of workpiece in a temperature range for plastic deformation and quenches and rapidly cools the deformed workpiece. A three-dimensionally movable unit, provided downstream of said heating and cooling unit, supports the metal material and controls the supporting position and/or the moving speed of the metal material to apply the bending moment in association with a feed amount, a heating amount, and a cooling amount of the workpiece. Even when a high-strength workpiece is bent, a workpiece having excellent shape fixability and uniform hardness distribution can be made, especially for application to sophisticated automobile parts. | 09-02-2010 |
| 20100218580 | METHOD FOR THREE-DIMENSIONALLY BENDING WORKPIECE AND BENT PRODUCT - A method for three-dimensionally bending a workpiece comprises feeding the workpiece by a feeding unit provided at an upstream side of the workpiece, supporting the workpiece by a supporting unit at a downstream side of the feeding unit, processing the workpiece by clamping the workpiece with a three-dimensionally movable unit that is provided downstream of the supporting unit, heating a local part of the workpiece in a temperature range which allows quenching to be performed, applying a bending moment to the heated local part of the workpiece by the three-dimensionally movable unit in association with the supporting position and/or the moving speed of the workpiece after the heating step, and rapidly quenching the heated portion. Even when a high-strength workpiece is bent, it is possible to effectively obtain a product having excellent shape fixability and uniform hardness distribution at low costs for wide application for bending sophisticated automobile parts. | 09-02-2010 |
| 20120003496 | HOLLOW MEMBER AND AN APPARATUS AND METHOD FOR ITS MANUFACTURE - A lightweight hollow member having a high strength such as at least 780 MPa, a complicated shape which can be applied to automotive parts, a high stiffness, and excellent impact properties, and a manufacturing apparatus and method which can form the hollow member by simple steps and which use relatively small and inexpensive forming equipment are provided. The manufacturing apparatus | 01-05-2012 |
| 20120009435 | BENT METAL MEMBER AND A METHOD FOR ITS MANUFACTURE - A bent metal member which is obtained by bending accompanied by heat treatment of a zinc-based coated metal material and which is suitable for use in components of automobiles due to having a high strength and excellent post-painting corrosion resistance is manufactured. The outer surface of a tubular metal material having on its surface a Zn—Fe alloy coating layer with a coating weight of 30-90 g/m | 01-12-2012 |
| 20120013148 | HOLLOW MEMBER - A lightweight hollow member having excellent stiffness and impact properties and which is suitable for automotive parts due to having a high strength such as at least 780 MPa and a complicated shape is provided. A hollow member | 01-19-2012 |
