Title: Manufacture of soybean extruder screws using a lathe with a whirling attachment

Authors: Zlatko Botak; Katarina Pisačić; Marko Horvat; Mirko Ficko

Addresses: University North, University Center Varaždin, Jurja Križanića 31b, 42000 Varaždin, Croatia ' University North, University Center Varaždin, Jurja Križanića 31b, 42000 Varaždin, Croatia ' University North, University Center Varaždin, Jurja Križanića 31b, 42000 Varaždin, Croatia ' Faculty of Mechanical Engineering, University of Maribor, Smetanova ulica 17, 2000 Maribor, Slovenia

Abstract: Long-threaded surfaces and worms can be machined by whirling, such that the cutting head removes material from the workpiece. Whirling can be performed using specialised cutting tools or standard lathes equipped with whirling thread-cutting devices. Worm cutting using a standard lathe is cheaper than employing a specialised device, but certain limitations imposed by the lathe technical parameters create risks of undercutting and interference between the workpiece and whirling attachment. For successful machining it was necessary to adjust the construction of the tool holder and the number of revolutions of the tool and the workpiece. In this paper, we modify a standard whirling device to overcome these issues.

Keywords: whirling process; thread cutting; surface quality; extruder screw.

DOI: 10.1504/IJMMM.2022.126595

International Journal of Machining and Machinability of Materials, 2022 Vol.24 No.5, pp.350 - 357

Received: 11 Jun 2021
Accepted: 06 Aug 2021
Published online: 28 Oct 2022 *

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