Abstract

Different constructions of bars are analyzed in the article, all of which are based on the idea of creating prestressed state in material. Improved construction of bar is proposed for equable spreading of elasticity zone along axis of boring bar.

Highlights

  • One of the problems which appear during boring and internal grinding of deep holes is a complexity of providing a required rigidity and vibration endurance of bar in the limited space

  • One of the accomplished solutions is a boring bar for stepped deep holes in hardly processed parts, welded of different materials [1]

  • It will provide an opportunity to solve mentioned problems of increasing spreading tension along the body length and decreasing interaction external influence on elements which are responsible for creating prestressed state in boring bars, tool bars, etc

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Summary

Introduction

One of the problems which appear during boring and internal grinding of deep holes is a complexity of providing a required rigidity and vibration endurance of bar in the limited space. One of the best solutions of increasing rigidity and vibration endurance is making prestressed state in the bar material. There are many researchers about ways to increase rigidity and vibration endurance of bars by creating prestressed state their body [1,2,3,4,5,6].

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