ABSTRACT:

This study summarizes some of the results of a research project supported by The Scientific and Technological Research Council of Turkey (TUBITAK). Characteristics of cutting by chain saw machines are experimentally investigated by applying laboratory full-scale linear cutting tests on block samples of natural stones, in addition to field studies. Block samples are cut by using chisel cutting tools at different cutting conditions. Some of the results of experimental studies, especially relieved cutting tests with different sideways angles of tools and cutting patterns for simulating cutting action of chain saw machines, and some of the in-situ investigations are summarized. The results indicate that cutting characteristics of chain saw machines can be successfully simulated by full-scale linear cutting experiments, thus leading deterministic modeling for performance prediction and optimization.

1 INTRODUCTION

Natural stone production and consumption have been growing gradually in all over the world. Chain saw machine has an important position among the machines/methods which are used for production of stone blocks. Increasing environmental concerns increase the importance and applications of chain saw machines. However, there are still technological problems in mining of relatively higher strength and more abrasive natural stones. The problems encountered are low production rates, high cutting tool consumption rates, and thus, high production costs. Chisel type cutting tools (also called wedge type and/or radial type cutting tools) made of tungsten carbide having rectangular prism geometry are the most widely used tools with a design of different sideways angles on chain saw machines. Tool (line) spacing and angular positions (sideways angle) and levels of striking points of each tool vary along the cutting profile as seen in Figure 1. Cutting action of a sequence of cutting tools is repeated by the following sequences having exactly the same lacing design and cutting profile.

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