Preliminary communication

https://doi.org/10.31803/tg-20190817135410

Vortex cooled air turning of induction-hardened raceway on the wind turbine-bearing ring

Mladen Bošnjaković orcid.org/0000-0001-9882-585X ; Technical Department, College of Slavonski Brod, M. Budaka 1, 35000 Slavonski Brod, Croatia
Olivera Maglić ; Technical Department, College of Slavonski Brod, M. Budaka 1, 35000 Slavonski Brod, Croatia
Dragomir Moškun ; Đuro Đaković Strojna obrada d.o.o. dr. Mile Budaka 1, 35000 Slavonski Brod, Croatia
Zoran Crnac ; Technical school, E. Kumičića 55, 35000 Slavonski Brod, Croatia

Abstract

In the turning process of hard materials with CBN cutting inserts, metalworking fluid is not advisable as it results in poorer quality of finished surface and shortening of the tool life. Dry machining, otherwise, develops excessive heat, residual stresses in the workpiece material due to thermal stress, and therefore causes possible problems of achieving tolerances on larger workpieces. During the dry turning of induction hardened raceway on the wind turbine-bearing ring of 1500 mm in diameter, problems with achieving tolerances occurred. The vortex-cooled air implementation during turning resulted in achieving designing tolerances of the workpiece, with better surface roughness and with less tool wear. The result was 50% lower cost of cutting inserts and small operating costs associated with air consumption. The vortex-cooled air implementation makes it possible to extend the tool life of CBN cutting inserts and thus higher cost-effectiveness of machining.

Keywords

cost-effectiveness of machining; turning; vortex-cooled air

Hrčak ID:

225477

URI

https://hrcak.srce.hr/225477

Publication date:

23.9.2019.

Visits: 1.344 *