# Experimental studies on the characteristics of chisel picks in coal cutting for bucket wheel excavators

## TL;DR

This paper studies how different factors affect the performance of chisel picks used in coal cutting for excavators.

## Contribution

A new rock cutting device was developed to experimentally analyze chisel pick performance under various conditions.

## Key findings

- The back clearance angle significantly influences cutting performance.
- Increasing the rake angle reduces the ratio of normal force to cutting force.
- A larger tip fillet radius improves mean cutting force and specific energy.

## Abstract

Chisel pick is a basic and important rock cutting tool, and the performance of chisel pick directly affects rock mining. In this paper, a rock cutting device was developed for chisel picks cutting experiments. The influence of the depth of cutting, width of chisel pick, rake angle, back clearance angle and tip fillet radius on the cutting performance such as cutting force, normal force, and specific energy has been comprehensively studied. In addition to the general conclusions, the experimental results show that the back clearance angle has an influence range on the cutting, and the ratio of the normal force to the cutting force decreases with the increase of the rake angle; the tip fillet radius greatly improve the mean cutting force and specific energy. The experimental results will provide data support for the design of chisel picks on rock excavation machinery and a more reasonable chisel pick cutting rock mechanics model.