Abstract

Abstract. Vibration during turning is a consequence of premature tool wear and an increase in the roughness of parts. The designs of tool bits that increase their durability, reduce vibrations arising during the cutting process, and improve the quality of processing are of practical and scientific interest. Existing developments of vibration-damping bits with elastic damping inserts of constant rigidity, in which a holder or mandrel with a cut-off insert is installed, do not meet the requirements for the efficiency of vibration reduction due to the impossibility of the necessary vibration damping; the consumption of insert materials is high. Innovative designs of tool bits with inserts formed by semi-inserts with different rigidity are proposed, which allows improving the quality of processing by increasing the efficiency of vibration damping, reducing material consumption, because the length of the semi-inserts is less than half the length of the full insert. The tool bits can be used in the area of cutting materials, mechanical engineering and tool manufacturing.

Highlights

  • Reducing the vibration level during cutting is the most important problem, especially taking into account the increasing requirements for the quality of processing [1,2,3,4]

  • Innovative designs of tool bits with inserts formed by semi-inserts with different rigidity are proposed, which allows improving the quality of processing by increasing the efficiency of vibration damping, reducing material consumption, because the length of the semi-inserts is less than half the length of the full insert

  • There is a damping tool bit containing a cut-off insert with a unit for its attachment in a holder which has a rabbet and an inserted element made of a material with a high damping property; the rabbet is made evenly along the perimeter of the end of the holder along the length from its end to the projection with the cut-off insert; the end of the holder with the rabbet is placed in a metal body made in the form of a rectangular parallelepiped with the same gaps along its base and walls and the gaps are filled with the material of the mentioned inserted element, and the holder is installed without the possibility of contact with the body [15]

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Summary

Introduction

Reducing the vibration level during cutting is the most important problem, especially taking into account the increasing requirements for the quality of processing [1,2,3,4]. Innovative designs of tool bits with inserts formed by semi-inserts with different rigidity are proposed, which allows improving the quality of processing by increasing the efficiency of vibration damping, reducing material consumption, because the length of the semi-inserts is less than half the length of the full insert.

Results
Conclusion

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