机械类毕业论文Mechanicalgraduationthesis.doc

机械类毕业论文(Mechanical graduation thesis)
Graduation love is art, marriage is technology, divorce is and fixture selection, material selection, axial the development of Pro Cessing, routes, procedures, for.
Key words: NC machining: linear interpolation; machining process: accuracy: programming.
The first chapter is introduction
NC machine tool is a highly efficient automatic equipment for automatic processing of workpieces according to the pre programmed numerical control program. In addition to ensuring the processing of qualified parts to meet the requirements, CNC programs should also give full play to the various functions of CNC machines, so that CNC machines can work safely, reliably and efficiently.
1. 1 working principle and development of NC machining
The NC machining process parameters and data processing is the input to the machine, the control system of the machine tool to calculate and control the input information, send pulse signal and servo motor to the direct command of functional components of machine tool motion machine, servo signal of pulse conversion and amplification processing, and then by the transmission mechanism to drive numerical control the machine, thus processing parts. Therefore, NC machining is the key to the acquisition of processing data and process parameters, that is, NC programming.
CNC machine tools and ordinary machine tools are different, the entire process does not require human operation, and the process to control. CNC machine tool parts, the first analysis of the requirements of part drawings, determine the reasonable processing route and parameters, calculation of cutter center trajectory and position data; and the entire process and other auxiliary functions (and inversion, cutting fluid opening and closing speed, change the knife is rotating spindle according to the movement) order, with the provisions of the code and program format compiled NC program, after debugging is recorded in the con