Process for bending metal sheet
AssigneesToyota Jidosha Kogyo Kabushiki Kaisha, Hosei Brake Industry Co., Ltd.
InventorsKoji Horie, Takashi Mune
Life of this patent
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Abstract
A process for bending on a press a metal sheet through a desired angle and an inner bend radius less than the thickness of the sheet, without causing damages such as cracking in a bend. According to this process, a metal sheet is first bent through an angle approximating a desired angle, with an inner bend radius being greater than the thickness of the metal sheet, and then the metal sheet thus bent is further bent through a desired angle, with the inner bend radius being less than the thickness of the metal sheet, and with the stretching of a material of the metal sheet on the outer side of the bend being suppressed.
Claims6
A process for bending a metal sheet in manufacture of a torque bearing member for a disc brake, comprising the steps of:
- bending a metal sheet through an angle approximating a right angle, with an inner bend radius being greater than the thickness of said metal sheet;
- and
- further bending the bent portion of said metal sheet by using a press through a right angle, with an inner bend radius being less than the thickness of said metal sheet, and with the opposite side-edges of said metal sheet being held fixedly,
- said formed disc brake torque bearing member thus shaped to form part of an assembly including, an inner pad and an outer pad arranged on the opposite sides of a brake disc having a rotary shaft, and a caliper for urging said pads against said brake disc, and
- said torque bearing member formed to include:
- a `U` shaped fixing or body portion extending along one side surface of said brake disc towards the peripheral edge of said disc;
- and opposite side-portions extending from the opposite sides of said fixing portion over the peripheral edge of said disc transversely outwardly and provided with a pair of guide portions for guiding an outer pad slidingly, said fixing portion forming right angled bends with said outer pad guiding portions, respectively.
A process for bending on a press a metal sheet through a desired angle and an inner bend radius less than the thickness of said sheet, comprising the steps of:
- bending said metal sheet through an angle approximating a desired angle, with an inner bend radius being greater than the thickness of said metal sheet;
- and
- further bending said metal sheet thus bent through a desired angle, with an inner bend radius being less than the thickness of said metal sheet, and with the opposite side-edges of said metal sheet being held fixedly, thereby providing partial damages in a bend thus formed.
Dependencies are inferred from the claim text.