Performance estimation of conical picks with slim design by the linear cutting test (I): depending on attack angle variation

Soon-Wook Choi; Soo-Ho Chang; Young-Taek Park; Gyu-Phil Lee

doi:10.9711/KTAJ.2014.16.6.573

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2014 Vol.16, Issue 6 Preview Page Next Page

Performance estimation of conical picks with slim design by the linear cutting test (I): depending on attack angle variation 선형절삭시험에 의한 슬림 코니컬커터의 절삭성능 평가(I): Attack Angle 변화에 의한 결과

30 November 2014. pp. 573-584

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Abstract

In this study, the variations of cutter acting forces depending on cutting conditions were examined to obtain basic data for roadheader cutting head design. The linear cutting tests were performed in the condition of different attack angles, penetration depths, cutter spacings by using a slim conical pick for the light cutting condition. Cutter acting forces were measured by 3-directional load cell under different test conditions, and the analysis for cutting performance were carried out after calculating average values of the measured results. It is confirmed that the optimal cutting condition for the mortar specimen is the 50 degree attack angle, the cutter spacing of 12 mm, the cutting depth of 9 mm which are obtained from the analysis results. In addition, 50 degree attack angle is more effective than 45 degree attack angle to design optimal specifications of cutting head.

Keywords

Roadheader

Pick cutter

Linear cutting test

Mortar specimen

Cutter acting force

Attack angle

본 연구에서는 로드헤더 커팅헤드 설계의 기본 사항인 절삭조건에 따른 커터작용력의 변화를 살펴보는 기초 연구를 진행하기 위하여 연암 및 보통암을 대상으로 하는 슬림 코니컬커터를 사용하여 받음각과 커터관입깊이, 커터간격의 조건에 따른 선형절삭시험을 수행하였다. 각 시험조건에서 커터작용력인 연직력, 절삭력, 구동력을 측정하였고 그 측정결과의 평균값을 사용하여 분석을 실시하였다. S/d비와 비에너지의 관계, 관입깊이와 비에너지의 관계, S/d비와 커터작용력의 관계로부터 받음각이 50°, 커터간격이 12 mm, 커터관입깊이가 9 mm인 조건이 모르타르시험체에 대한 최적의 절삭조건임을 확인할 수 있었다. 특히 받음각이 50°인 경우가 45°인 경우에 비해 장비사양 설계를 위해 더 효과적임을 알 수 있었다.

키워드

로드헤더

픽커터

선형절삭실험

모르타르실험체

커터작용력

받음각

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Information

Publisher :Korean Tunneling and Underground Space Association
Publisher(Ko) :한국터널지하공간학회
Journal Title :Journal of Korean Tunnelling and Underground Space Association
Journal Title(Ko) :한국터널지하공간학회 논문집
Volume : 16
No :6
Pages :573-584
Received Date : 2014-11-13
Revised Date : 2014-11-20
Accepted Date : 2014-11-24
DOI :https://doi.org/10.9711/KTAJ.2014.16.6.573

Journal of Korean Tunnelling and Underground Space Association ISSN:2233-8292(Print) 2287-4747(Online) 한국터널지하공간학회 논문집

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