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 rotation and 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.
PISTON AND PISTON ROD ASSEMBLY MANUFACTURING METHOD
VERFAHREN ZUR HERSTELLUNG EINES KOLBENS UND EINER KOLBENSTANGENANORDNUNG
PROCÉDÉ DE FABRICATION D'ENSEMBLE PISTON ET TIGE DE PISTON
2022-03-09
Patent
Electronic Resource
English