International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

This paper presents the simulation and verification of programs created for the CNC Hitachi Seiki Seicos LIII lathe machine tool. The main purpose of program simulation and verification is to ensure the quality and accuracy of the cutting process, which can significantly improve production efficiency. In addition to defining the toolpath, simulation can perform linear and circular interpolation according to specific programs based on G – codes. Therefore, all the motions of the moving parts of the real lathe machine tool can be clearly visualized. The use of simulation is a good solution not only to precise the toolpath, but also verify the program and detect any possible collision between cutting tools and mobile components, before loading the program into the lathe machine tool and starting cutting processes.

A lathe is a machine that removes metal from a workpiece to the required shape and size. A lathe operates on the principle of a rotating workpiece and a fixed cutting tool. The cutting tool is fed into the workpiece, which rotates about its own axis, causing the workpiece to be formed into the desired shape. The operation by which the excess material is removed from the workpiece to produce a cone or cylindrical shape is called turning, and the operation used to cut a flat surface perpendicular to the workpiece’s rotational axis is called facing. Speed, feed, and depth of cut are important factors that have to be determined according to the power of the CNC Spinner EL-510 lathe using a PCLNR 2525M 12 shank tool and a CNMG 120408-PM 4325 tool insert.

Recent most important improvements in metal cutting industry are utilization of cutting tool and tool condition monitoring systems. These systems help to prevent damage to both machine tools and workpieces. New technologies in optical measurements allow construction of tool condition monitoring systems which does not affect manufacturing processes and are relatively cheap to build because of low prices of optical sensors compared to standard sensors and measurement techniques, built on cutting machines. Our paper summaries various monitoring methods for tool condition monitoring in the milling processes that use optical sensors and optical methods combined with machine vision and image processing, that have been practiced and described in literature.

The article presents the observed manufacturing technology implementation difficulties in workshop practice, resulting from the construction and principles of operation on the DMG’s SPRINT 32/5 CNC linear automatic lathe and on the Mazak’s HQR 150 MSY and QTN 200 MS CNC turn – mill centers, and discusses possible rules for solving the production problems encountered. The article also discusses the principles of dividing the machining process and working steps on multi-spindle CNC turn – mill centers. It is worth to build a system supporting the selection of the sequence of treatments [1], taking into account the frequency of natural vibrations and stiffness obtained after each single machining operations.
The article shows the method of verification of the selection of the machining planning method on CNC multi-spindle lathes.

Drilling is most often associated with hole-making. The surface roughness parameters represent a measure of surface quality, and it is mainly influenced by the cutting process parameters (cutting speed, feed rate, drill diameter), tool geometry, tool material, tool type, type of processing, coolant and lubricating fluid, tool machine and type of work piece material.

The purpose of this paper is to explore the effects of drilling parameters such as; cutting speed (vc), feed rate (f), drill diameter (d) and drill point angle (θ) on the surface roughness. There are different parameters used to estimate the severity of the surface roughness (Ra, Rz, Rq and Rt). The arithmetic average deviation Ra is commonly used for finish surface processing. The experimental plan was based on Box –Wilson Central Composite Design. First order model predicting equations for surface roughness have been established by using RSM methodology to collecting the experimental data, during machining of Ck45E steel according to EN 10083-1.1191 in wet drilling process, using HSS coated TiN drill tools.

Use of an industrial robot in the automatic production process as a spindle carrier is currently an interesting topic. However, if the stiffness of the robot is not sufficient, various imprecisions may occur during machining. The article deals with monitoring and evaluation of the impact of cutting conditions and positions of the workpiece in the working area on machined surfaces oriented in orthogonal planes. The aim of the experiment is to analyse the precision of simple planar surfaces milled using a robot