Analytical study on critical load and deformation of chip in high-pressure jet assisted machining

Kern, Matjaž (author), Dražumerič, Radovan (author), Pušavec, Franci (author)

In machining, particularly of difficult-to-machine materials, chip-breaking with the aim to avoid entangled chips represents an important issue. In contrast to the widely used obstacle-induced chip breaking (e.g., chip former on the rake face of the cutting insert), the use of the high-pressure jet offers a potential for active, load-induced chip control. In this paper, the essential mechanics of the high-pressure jet assisted machining process is revealed by a robust analytical model as an elastic-plastic bending of a helical chip considering the spring-back effect. The description of the helical chip geometry and the determination of the bending moment caused by the jet are adapted to the fundamental model of chip-mechanics. The critical bending moment of the chip breakage is assessed, which could be an important step towards the determination of the critical coolant supply pressure. The model is validated by chip-in-hand radius measurements for various turning conditions over the full range of applied coolant pressure up to chip breakage.

• Language: English
• Keywords: turning, high-pressure jet, helical chip, bending, elastic-plastic deformations, spring back
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2023
• Number of pages: 12 str.
• Numbering: Vol. 316, art. 117944
• PID: 20.500.12556/RUL-147996
• UDC: 621.9
• ISSN on article: 0924-0136
• DOI: 10.1016/j.jmatprotec.2023.117944
• COBISS.SI-ID: 158995971
• Publication date in RUL: 17.07.2023

Record is a part of a journal

• Title: Journal of materials processing technology
• Shortened title: J. mater. process. technol.
• Publisher: Elsevier
• ISSN: 0924-0136
• COBISS.SI-ID: 30105600

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: struženje, visokotlačno rezanje, spiralni odrezki, upogib, elasto-plastične deformacije, povratna deformacija

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0266
• Name: Napredne izdelovalne tehnologije za visokokakovostno in trajnostno proizvodnjo