The main surface of all kinds of precision hardware shaft parts is the outer surface of each journal, the accuracy of the bore of the hollow shaft is generally not required, and the accuracy of the secondary surfaces such as threads, splines and keyways on the precision hardware shaft is also relatively high. Therefore, the machining process route of shaft parts mainly considers the processing order of the outer circle and intersperses the processing of secondary surfaces reasonably. I will introduce you to the following, the production of different precision, different materials commonly used in the machining process route of various types of precision hardware shaft parts:.
(1) general carburized steel precision hardware shaft parts processing process route: preparation - forging - normalizing - playing top hole - rough turning - semi-finish turning, finish turning - carburizing (or carbonitriding) - quenching, low-temperature tempering - rough grinding - secondary surface machining - finish grinding.
(2) General precision quenched steel precision hardware shaft processing process route: preparation - forging - normalizing (annealing) - playing the top hole - rough turning - quenching - semi-finishing turning, finishing turning - surface quenching, tempering - rough grinding - secondary surface machining - finishing grinding.
(3) precision nitrided steel shaft parts processing process route: preparation - forging - normalizing (annealing) - playing the top hole - rough turning - eight quality - semi-finish turning, finish turning - low-temperature aging - rough grinding - nitriding treatment - secondary surface processing - finish grinding - light grinding.
(4) the overall quenching precision hardware shaft parts processing process route: preparation - forging - normalizing (annealing) - playing the top hole - rough turning - tempering - semi-finish turning, finish turning - secondary surface processing - overall quenching - rough grinding - low-temperature aging - finish grinding.
General precision hardware shaft parts, the final process using fine grinding is sufficient to ensure the quality of processing. Precision shaft parts, in addition to finishing, should also be arranged for finishing processing. For shaft parts other than the overall quenching, the finishing process can be arranged in accordance with the specific circumstances of the different quenching and heat treatment before, or arranged in the quenching and heat treatment after the secondary surface processing before.
It should be noted that the quenched parts, can not use the general tool, shaft parts of the main surface is the outer surface of each journal, hollow shaft bore accuracy is generally not high, and precision spindle threads, splines, keyways and other secondary surface accuracy requirements are relatively high. Therefore, the machining process route of shaft parts mainly considers the machining sequence of the outer circle, and the machining of secondary surfaces is reasonably interspersed.