The alien stone turning-milling compound machining center is a new generation gap multifunctional compound machining center. It is used to process rotating part of alien stone products and three-dimensional sculpture products. The pillar and guiding rail are the key parts of the machining center. The straightness error of the pillar and guide rail seriously impacts the linear motion precision of beam parts. Comparison the straightness of guiding rail with pillar or without pillar, it shows that the results meet the standard of GB/T16462-1996. So it ensures the accuracy of the linear motion precision of beam parts. It lays a solid foundation for achieving the design function and machining precision.

NC machine plays an irreplaceable role in the modern manufacturing because of its high machining processing accuracy, quality stable, flexibility. Through using the Renishaw ML10 laser interferometer detect the positioning accuracy and repositioning accuracy of X axis and Z axis of the HTC20 series of NC machine tools. According to the detection result compensate NC system to meet the machining accuracy requirement. The result shows that the error compensation of NC system is a effective method to improve the position accuracy of NC machine.

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Hob plays an important role in the efficiency of Tunnel Boring machine (TBM). In this paper, a rock hob test-bed is designed and developed by the software of SolidWorks, and analysis of force and deformation of the test-bed is carried by the finite element method.The new rock hob test-bed includes the framework、moving workbench and its hydraulic system、hob saddle system and its hydraulic system, and measurement and control system. The improvement methods of the structure to decrease the maximum stress are showed in this paper. The research shows that the structural design of the rock hob test-bed is reasonable; its function meets experimental requirements of rock cutting; in the case of maximum load, the stress and deformation of the rock hob test-bed are less than their allowable value of materials. The research results are very helpful to understand the working mechanism and improving the structure design of the cutter-head of TBM.

The alien stone turning-milling compound machining center（HTM50200）is the new generation multifunctional compound machining center. It is used to process rotating alien stone products and three-dimensional sculpture products. Pillar is the key support part of the machining center. The parallelism, straightness, levelness of the pillar affects the straight-line movement precision of beam parts. Therefore, the assembly precision debugging of the pillar plays the decisive role in the overall accuracy of this machining center. This paper introduces a kind of method by laser interference adjusting the assembly accuracy of the pillar. The results meet the design requirements of the assembly accuracy of pillar. It lays a solid foundation for the following-up assembly of the alien stone turning-milling compound machining center.