拉刀加工（Broach processing）.docVIP

拉刀加工（Broach processing） Pull bed processing technique The author: ten thousand to be published in: 2011-7-18 22:46 Monday The pull bed is a kind of machine tool used in batch production. It is applied to various kinds of mechanical parts, such as disc, sleeve, ring and so on. More use in automobile, metal cutting machine tools, agricultural machinery, spinning machine, belt saw bed, horticultural machinery, reducer, water pump, gear, sprocket, worm wheel and other manufacturing industries. It has the characteristics of high precision, high efficiency and low cost. Here are some of the problems and the solutions that should be taken. 1. The structure type of mechanical inner bed There are various mechanical structure of the internal broaching machine, broaching machine structure is simple, economical, thought 10 by the belt transmission structure movement by electricity to reducer on the pulley 8, then through reducer (deputy) gear transmission to screw 5 (screw nut is an organic whole repeatedly with the drive gear transmission gear pair). For screw is an organic whole repeatedly with the slip board 3, 5 when electricity idea rotation (positive or negative), slip board for reciprocating motion, and on the slide carriage drives the broach broaching head for reciprocating linear motion, so as to realize the main movement of broaching. The guide track of the main type of broaching bed adopts the cylinder guide rail, its advantages are simple structure, good technology and low cost. Its disadvantages are easy to wear, short life and low transmission efficiency. 2. Problems in the processing of broaching machines and their causes A factory for the need of producing, designed a simple mechanical broaching machine, as shown in figure, through many years production practice found that the machine has some deficiency, mainly manifested in the following aspects: (1) for some materials with better plasticity, such as annealed 45 steel, 20CrMnTi and other materials, the surfac