Advanced

Improving waviness of bore in precision hard turning by pressurized coolant

Zhou, Jinming LU ; Hognas, Stefan and Ståhl, Jan-Eric LU (2010) In International Journal of Advanced Manufacturing Technology 49(5-8). p.469-474
Abstract
Precision hard turning is an emerging innovated machining technology for machining hardened workpiece (60 similar to 62 HRC) with characteristic of better flexibility, high production rate, and cost saving. However, one of problem in this process is that it is difficult to remove the thermal distortion of the workpiece induced by the heat generated during the process, especially in the case of precision hard turning of bore. In this paper, pressurized coolant was used in a precision hard turning of bore, with polycrystalline cubic boron nitride as the tool materials, to reduce the thermal distortion of the machined part such as form error and to improve its waviness. The pressurized coolant jet was directly delivered under the chip on the... (More)
Precision hard turning is an emerging innovated machining technology for machining hardened workpiece (60 similar to 62 HRC) with characteristic of better flexibility, high production rate, and cost saving. However, one of problem in this process is that it is difficult to remove the thermal distortion of the workpiece induced by the heat generated during the process, especially in the case of precision hard turning of bore. In this paper, pressurized coolant was used in a precision hard turning of bore, with polycrystalline cubic boron nitride as the tool materials, to reduce the thermal distortion of the machined part such as form error and to improve its waviness. The pressurized coolant jet was directly delivered under the chip on the rake face. Experimental result indicated that form error induced by the heat has been reduced, and waviness of the bore was improved with use of pressurized coolant. Crater wear is smaller under pressurized coolant compared to dry cut due to lower rake face temperature and shorter contact length between chip and workpiece. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
PCBN, Coolant, Waviness, Hard turning
in
International Journal of Advanced Manufacturing Technology
volume
49
issue
5-8
pages
469 - 474
publisher
Springer
external identifiers
  • wos:000278625400006
  • scopus:77953616033
ISSN
0268-3768
DOI
10.1007/s00170-009-2430-z
language
English
LU publication?
yes
id
b4c898e3-076c-4ed5-b4d8-1e31e7af3016 (old id 1631029)
date added to LUP
2010-07-21 13:24:38
date last changed
2018-05-29 12:12:35
@article{b4c898e3-076c-4ed5-b4d8-1e31e7af3016,
  abstract     = {Precision hard turning is an emerging innovated machining technology for machining hardened workpiece (60 similar to 62 HRC) with characteristic of better flexibility, high production rate, and cost saving. However, one of problem in this process is that it is difficult to remove the thermal distortion of the workpiece induced by the heat generated during the process, especially in the case of precision hard turning of bore. In this paper, pressurized coolant was used in a precision hard turning of bore, with polycrystalline cubic boron nitride as the tool materials, to reduce the thermal distortion of the machined part such as form error and to improve its waviness. The pressurized coolant jet was directly delivered under the chip on the rake face. Experimental result indicated that form error induced by the heat has been reduced, and waviness of the bore was improved with use of pressurized coolant. Crater wear is smaller under pressurized coolant compared to dry cut due to lower rake face temperature and shorter contact length between chip and workpiece.},
  author       = {Zhou, Jinming and Hognas, Stefan and Ståhl, Jan-Eric},
  issn         = {0268-3768},
  keyword      = {PCBN,Coolant,Waviness,Hard turning},
  language     = {eng},
  number       = {5-8},
  pages        = {469--474},
  publisher    = {Springer},
  series       = {International Journal of Advanced Manufacturing Technology},
  title        = {Improving waviness of bore in precision hard turning by pressurized coolant},
  url          = {http://dx.doi.org/10.1007/s00170-009-2430-z},
  volume       = {49},
  year         = {2010},
}