Remanufacture of rotary tables for heavy duty machine tools

Dan Prodan,Adrian Motomancea,Alina Ovanisof,Anca Bucuresteanu,D.P Karaivanov

doi:10.1051/matecconf/202031703001

Dan Prodan, Adrian Motomancea + Show 3 more

Open Access

https://doi.org/10.1051/matecconf/202031703001

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Abstract

In this paper, the authors present some of the theoretical and experimental research conducted on the occasion of rotary tables remanufacturing for CNC machine tools belonging to Boring and Milling Machines family. They give the constructive solutions applied on CNC machines and the specific systems of guiding, locking and driving. The authors present also the modifications required when passing from CC variant to CNC variant in terms of locking - indexing systems and hydraulic suspension systems. The paper presents different achievements but insists particularly on the remanufacture of the rotary table with useful area 1700x2000 mm with longitudinal travel of 1000 mm (MRD 1700x2000/1000).

Highlights

IntroductionThe rotary tables [1] are part of the structure of conventional or CNC machine tools
Rotary tables for machine toolsThe rotary tables [1] are part of the structure of conventional or CNC machine tools
The research can be a real support for the remanufacturing of conventional rotary tables and their transition to the necessary level of CNC systems

Summary

Introduction

The rotary tables [1] are part of the structure of conventional or CNC machine tools. As the linear travel is performed by means of a ball screw, and the rotation movement – by means of a crown and pinion double system with backlash mechanical takeover, it was found out that the remanufacturing was possible. In these conditions, the translation movement can be correlated with other movements of the associated machine (AF boring and milling machine) for making interpolations. If the rotary table makes a feed movement too, the locking system 7 may disappear In this case, the intended position is maintained by the motor and the control system, obtaining what is called “hold axis”. The notations used in fig. 4 are the following ones: 1-pinions, 2-crown gears (Z3=Z’3=18, Z4=162)

Remanufacture of the hydraulic unit

Conclusions