According to the specific structure of the hopper and cylinder of twin screw cone feeder machine, 16MnR and austenitic hopper and machine cylinder and stainless steel 1Cr18Ni9 are used for construction by welding process instead of cast steel ZG310-570 galvanized originally. The weld technology process is formulated. In the process of implementation of the program, the difficulties of the process as follows are solved: Selection the alternative materials; rational design of cooling water structures; form and position tolerances between double cone screw and inner sphere – conical surface, reduction of the difficulty of processing the double cone cambered, welding deformation control, post - weld heat treatment of removal residual stresses.

In this paper, we design the open numerical control system of PC based on embedded motion control card. This open NC teaching machine tool is not only for the removal to meet the teaching requirements of the mechanical design, but also allows users to define instructions, to convert CNC instructions to the control card built-in function on the PC; to export the control information to control machine tool axis movement. This greatly enhances the students’ interest, and helps them to faster formation of the core competencies of the CNC technology.