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Research on machining method for screw-rotor in conical twin-screw extruder

Tang Chang-ping

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Abstract

The machining precision of the engaged conical twin-screw rotors,which are the key parts of a conical twin-screw extruder,has direct effect on the performance of the extruder.The precision and efficiency of the conventional machining method are lower,and the intermeshing and exchanging characters of the machined screw-rotor are worse.In order to improve the performance of an extruder,the geometry of the conical twin-screw was studied,and subsequently a new NC manufacturing method for milling screw-rotor with cylindrical end milling cutter was proposed.5-axis integrated CNC machine tool for machining spiral flute was designed and produced.And a complete set of automatic programming system for NC machining of screw rotor was developed. The present research is of important engineering significance in improving the machining level of conical twin-screw.

About this research paper

What this paper is about

The machining precision of the engaged conical twin-screw rotors,which are the key parts of a conical twin-screw extruder,has direct effect on the performance of the extruder.The precision and efficiency of the conventional machining method are lower,and the intermeshing and exchanging characters of the machined screw-rotor are worse.In order to improve the performance of an extruder,the geometry of the conical twin-screw was studied,and subsequently a new NC manufacturing method for milling screw-rotor with cylindrical end milling cutter was proposed.5-axis integrated CNC machine tool for machining spiral flute was designed and produced.And a complete set of automatic programming system for NC machining of screw rotor was developed. The present research is of important engineering significance in improving the machining level of conical twin-screw.

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Available abstract

The machining precision of the engaged conical twin-screw rotors,which are the key parts of a conical twin-screw extruder,has direct effect on the performance of the extruder.The precision and efficiency of the conventional machining method are lower,and the intermeshing and exchanging characters of the machined screw-rotor are worse.In order to improve the performance of an extruder,the geometry of the conical twin-screw was studied,and subsequently a new NC manufacturing method for milling screw-rotor with cylindrical end milling cutter was proposed.5-axis integrated CNC machine tool for machining spiral flute was designed and produced.And a complete set of automatic programming system for NC machining of screw rotor was developed. The present research is of important engineering significance in improving the machining level of conical twin-screw.

Key concepts: Conical surface, Machining, Rotor (electric), Mechanical engineering, Spiral (railway), Engineering, Materials science, Engineering drawing

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