Estimating critical depth of cut and tool factor for a mechanical scribing process

Junz Jiunn-jyh Wang, Yong Yuan Liao

Research output: Contribution to journalArticle


A method is presented to estimate the critical depth of cut and determine the tool factor for the scribing tool for a mechanical scribing process. Critical depth of cut in the ductile to brittle transition depends not only on the material properties, but also on the edge geometry of the scribing tool, cutting conditions and orientations. Present theory for predicting the critical depth of cut requires the material properties as well as a tool factor, which depends on the tool geometry and cutting conditions. While material properties are usually available, a systematic method to obtain the critical depth of cut and the tool factor from experimental data is currently not available. The proposed new method is based on the change of specific scribing energy as the brittle material experiences a transition from ductile to brittle deformation state when the depth of cut increases. Experimental results show that the presented method yields consistent tool factor for a given tool geometry with different types of work materials.

Original languageEnglish
Pages (from-to)153-157
Number of pages5
JournalJournal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao
Issue number2
Publication statusPublished - 2006 Apr

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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