Selection of precision piston rod blanks and blank production methods

Because the working mode of the precision piston rod is the way of reciprocating motion, in order to increase the life of the piston rod and reduce the wear halo of the piston rod, 38CrMoAIAn alloy structural steel is selected for the blank.

In order to improve the production efficiency, free forging should be used to make the blank. Determination of blank shape and size.

1. Blank shape

According to the machining accuracy requirements of each part of the part drawing, the dimensional tolerance level of forgings is 8-12. And because the precision piston rod is selected for small batch production, the selection of cylindrical blanks is considered.

2. Blank base wood scale

Because the production method of the blank is free casting, according to the size requirements of the precision piston rod component drawing and the actual processing requirements, the size after casting is set as: diameter 62mm, length 1150mm,

Check the technical manual and determine the size of the blank: 80mm in diameter and 760mm in length.