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Cold Formed Brake Pistons

A piston and piston wall technology, applied in the field of cold forming brake pistons, can solve problems such as limitations, large workload, and inappropriate forming degrees of freedom, and achieve the effect of light and strong structure

Active Publication Date: 2021-12-21
CONTINENTAL AUTOMOTIVE TECH GMBH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The known deep-drawing methods (Napfziehverfahren) require a great deal of effort and / or have the disadvantage that they are carried out essentially with a gradual reduction of the wall thickness (relative to the original sheet thickness), in principle the piston head has a piston system The thickest wall thickness and in which the piston wall is reduced relative to it, i.e. by stretch forming
Consequently, the obtained degree of shaping freedom is unduly limited at an acceptable effort

Method used

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  • Cold Formed Brake Pistons
  • Cold Formed Brake Pistons
  • Cold Formed Brake Pistons

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Embodiment Construction

[0020] about figure 1 , in order to simplify understanding and avoid unnecessary complete repetition, the description of EP 2 304 265 B1 is hereby incorporated in its entirety, so that due to this incorporation a basic enumeration of known interrelationships is sufficient.

[0021] according to figure 1 The brake piston 1 is made of a metal material (for example a flat metal plate with a wall thickness s0) through a forming process and is constructed in one piece as a cylinder open on one side with a piston longitudinal axis A, a piston wall 2 and a piston head 3 . The piston head 3 serves as an interface in multiple (three) ways. On the one hand, the piston head 3 can be provided with an axial contact surface to bear against the symbolically shown back plate 4 of the brake pad. On the opposite side, the piston head 3 delimits a hydraulic chamber with a piston interior 5 , and the parking brake actuator system likewise acts on the piston head 3 . To this end, the piston in...

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Abstract

A brake piston (1) for a brake caliper of a disc brake, said brake piston being manufactured from a metal material by forming processes, in particular from a flat sheet metal, and integrally formed with a piston longitudinal One-sided open cylinder with axis (A), piston wall (2) and piston head (3). Locally confined, i.e. partially cold-rolled or partially stretched, at least one cylindrical piston wall part provided with a partially deformed piston wall (2) by means of plastic redistribution (flow) The material deformation is adaptively structured, and the material redistribution includes work hardening of the piston wall thickness (s2, s3, sn).

Description

technical field [0001] The invention relates to a cold-formed brake piston, which preferably has an interface device for a parking brake. Background technique [0002] Basically, cylindrical brake pistons are known which are open on one side and have a piston head, a piston wall and a suitable interface device for service brake calipers of disc brakes. These pistons are obtained by forming methods, that is, they are not simply cast and machined, but obtained by forming processes, such as extrusion or deep drawing. Due to the separate center of gravity and development goals, the brake pistons of the service brakes are not suitable for the combined actuation of the parking brake calipers. For example, its piston interior is optimized for engaging and tightening the lining retaining spring, without any interface for the parking brake mechanism. [0003] EP 2 304 265 B1 discloses a formed, work-hardened steel multi-part parking brake piston intended for a combined-actuatable p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D65/18B21D22/14B21K1/18
CPCB21D22/14B21K1/18F16D65/18F16D2123/00F16D2125/06B23P15/10B23P9/00C21D7/02C21D7/04C21D2221/00F16D2121/04
Inventor 乌维·巴赫乌维·泽比格马蒂亚斯·穆勒乌利齐·洛伦兹里科·鲍尔斯费尔德
Owner CONTINENTAL AUTOMOTIVE TECH GMBH
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