A piston and piston rod assembly for a linear actuator is manufactured by a friction welding method. The piston rod comprises a flash portion formed by a narrowed portion with a flash surface formed by an end face. The piston comprises a flash chamber formed by a centrally positioned recess. In the friction welding method the flash portion is inserted into the flash chamber and a relative rotationand an axial pressure in between the piston rod and the piston is carried out such that the flash surface joins to the chamber bottom. Advantageously, a clean welding step is provided which step allows a prior placement of a seal assembly around the piston rod. The seal assembly including a wiper, seal ring and a gland can be placed around the piston rod before the clean welding step is carried out.
用于线性致动器的活塞和活塞杆组件通过摩擦焊接方法制造。活塞杆包括由狭窄部分形成的闪光部分,该闪光部分具有由端面形成的闪光表面。活塞包括由中心定位的凹陷形成的闪光腔室。在摩擦焊接方法中,将闪光部分插入到闪光腔室中,并在活塞杆与活塞之间实施相对旋转和轴向压力,使得闪光表面接合到腔室底部。有利地,提供清洁焊接步骤,该步骤允许围绕活塞杆预先放置密封组件。在执行清洁焊接步骤之前,包括擦拭器、密封圈和密封压盖的密封组件可以围绕活塞杆放置。
PISTON AND PISTON ROD ASSEMBLY MANUFACTURING METHOD
活塞和活塞杆组件的制造方法
25.09.2020
Patent
Elektronische Ressource
Chinesisch
Piston push rod assembly, master cylinder, and manufacturing method for piston push rod assembly
Europäisches Patentamt | 2017
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