How should the blank forging of piston rod be selected

I believe that for some engaged in mechanical personnel know that a lot of mechanical products will be applied to the piston rod of the main way of work is to reciprocate.

Therefore, in order to better extend the life of the piston rod, reduce the frequency of piston rod wear, it is necessary to choose a good, suitable piston rod blank.

So do you know how to choose the piston rod blank forging? The following are mainly for you to introduce in detail:

In general, 38CrMoAlAn alloy structural steel is suitable for piston rod blank. Because this 38CrMoAlAn alloy structural steel can obtain high core strength, excellent wear resistance and fatigue resistance after quenching and tempering treatment and surface nitriding.

If the piston rod forgings are produced in small batches, in order to effectively improve the efficiency of production, it is best to choose free forging to make rough. But when the blank is made by free forging, the blank scale and shape must be determined:

1. Blank shape:

In general, if it is a small batch production of piston rod, the best choice of cylindrical blank. But because different parts in the processing accuracy requirements will also be different, therefore, the need to forge the scale tolerance level as 8-12.

2. Blank scale:

Because the production method of blank is free casting, it should be based on the scale requirements of the piston rod parts diagram and the practical processing needs, the scale after casting is set as: diameter 62mm, length 1150mm, and then concluded that the scale of blank is: diameter 80mm, length 760mm.

Also note: in the determination of good blank manufacturing method and size and tolerance, the first should be the piston rod turning forming, grinding. But in the turning and grinding, must be at both ends of the center hole as a fine benchmark positioning (in line with the principle of benchmark unity), the center hole can be processed before the rough car.