New Extrusion Process for Producing Twist Drills Using Split Dies

Abstract

The paper presents a new extrusion process for producing twist drills using split dies. The design of the dies is described, where the profile of the flute-forming element is the same as the profile of the flute on the plane inclined to the drill axis at an angle equal to the helix angle. The proposed method for the extrusion of twist drills by the new type of dies is verified by numerical modeling. Three cases of the extrusion process are modelled, each with a different position of the flute-forming element relative to the axis of the drill. The paper investigates the effect of the position of the flute-forming element on the angle of inclination of the flutes and the cross-section shape of the drill. Numerical modeling is performed using DEFORM-3D.

Research Progress on the Manufacturing of Screw-Shaped Parts in Screw Compressors

“…The experimental result revealed that a relatively high forming precision and relatively low damage value of 304 stainless was obtained under the rolling depth of 3.3 mm and formation speeds below 15 mm/s. Bulzak et al [35,36] analysed the forward extrusion forming (FEF) process of twist drills, as shown in Figure 7. During the extrusion process, the starting materials were heated to a suitable temperature for hot forming.…”

“…The results demonstrated the feasibility of the production of either hollow or solid screw rods with a high uniformity in wall thickness by the RCFF process. They found that when the belt height where the die works Bulzak et al [35,36] analysed the forward extrusion forming (FEF) process of twist drills, as shown in Figure 7. During the extrusion process, the starting materials were heated to a suitable temperature for hot forming.…”