The reason of planer tool concession produced in planing the inner ape rture keyslot of wheel hub of two wheel tractor is analyzed, and the planing lim it deep and the intension of the tool holder are calculated.

Drawing line tool for plane keyslot of shaft parts can simplify drawing line process,avoid parts transportation between working maching and drawing line platform, make convenience for regulation during working keyslot and enhance the working efficiency.

Design of measurer for azimuth request between hole keyway and gear tooth;

The jig and cutter positioning method of the processing keyway on shifts;

An analysis of the keyway symmetry error evaluation methods;

In the thesis the author analyzes the current punching situation of keyseat and mark hole when making electric motor iron core;puts forward the concept of using quickchange die-block to improve the quality and reduce the costs;designs and provides the basic structure of quickchange die-block and expounds the main points of quickchange die-block production and application.

The main reasons are that small root\'s radiums of keyseatIn which caused heat treatment stress concentration at keyseat root,lead failure.

th technologies for heat treatment of long and thin shafts with key slots have been discussed and more attention has been paid on some successfal processing practices, such as quenching with slot cap, protective coating quenching,quenching and cooling with workpieces inclined, and carburizing and decarburizing, etc.

Rightness of dime nsions mark will directly affect machining process and precision , in particular dimensions mark on symmet ry structure of aperture and key slot in spares is to be drawn in accordance with symmetry shape tolerance an d demand in utterance and therefore the mark way is flexible .