Increase in Processing Efficiency of Long-Length Shafts

Conditions of ensuring quality parameters of directing mechanical operation of  hydraulic cylinder rod surface by turning and by methods of superficial plastic deformation are described in the paper.

Purpose of reseach is to increase in stability and productivity of nonrigid details processing when ensuring required quality parameters.

Methods. Analysis of static and dynamic characteristics of a tool system for cutting-deforming processing was done. Analysis of Lamina and Mitsubishi solid-state cutters was done by Solidworks program. 2³ experiment was done to check operability of Mitsubishi cutter, stability of otained sizes, roughness of surfaces. It was also done to define the period of firmness of plates.

Results. Mitsubishi cutter was chose according to the results of the analysis made by Solidworks program and experimental industrial processing was carried out. Industrial experiment shows that there are vibrations made by Mitsubishi cutter at recommended cutting speed 200 … 300 m/min. Experimental cutting speed was ≈ 40 m/min to eliminate vibrations made by Mitsubishi cutter. Processing productivity decreased considerably due to cutting speed reduction. New tool design of a tool system for cutting-deforming processing of nonrigid details -"shafts" was developed. New tools increase processing productivity at obtaining stability of required quality parameters: rolling head with damping element and damping cutter. Laboratory tets of a rolling head was done. Rolling effort, surface condition was defined before rolling. Vibroacoustic diagnostics of damping cutter operation in vitro was carried out. Experimental inspection of new tools operation of a tool system and analysis of quality parameters was carried out.

Conclusion. Use of new tools of a tool system for combined cutting-deforming processing allows to increase productivity and stability of the process and to ensure set parameters: accuracy of a form, sizes, roughness (JT7...8, Ra <0.16 … 0.32 microns) and physicomechanical properties of detail´s surface layer.

nonrigid detail, tool system, roughness, vibrations, damping cutter

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