The Quality Issue of the Parts Blanked from Thin Silicon Sheets

Abstract

In this paper, the wear mechanism of punches made of M3:2 and M2 steel sheet which are used in blanking process of the rotor part of the low-power asynchronous motor was presented. The influence of additional TiN coating on the punch flank surface degradation intensity was described. The punch wear influence on the hardness changes close the material intersection surface was determined. The research results indicate that the tool durability ensures the quality of parts blanked from electrotechnical steel. The results will allow for selection of new tools materials for this type of tools which are used in difficult tribological conditions.

Optimum Clearance in the Microblanking of Thin Foil of Austenitic Stainless Steel JIS SUS304 Studied from Shear Cut Surface and Punch Load

“…Even in conventional shearing, punch breakage and wear are two of the most important issues, and various studies on punch load in conventional shearing have been conducted so far. For example, Aoki et al studied the tool cutting edge wear mechanism by shear experiments [13], Maeda et al verified the progress of the tool cutting edge wear [14], Koga et al verified the relationship between clearance and tool wear [15], and the punch wear and quality of punched products, in punching thin sheets [16][17][18][19][20].…”

Analysis of the Influence of Blanking Clearance on the Wear of the Punch, the Change of the Burr Size and the Geometry of the Hook Blanked in the Hardened Steel Sheet

“…The cut elements are usually subjected to further plastic working, but there are also those that are directly used in the assembly process of complex products. The blanking of the elements with a punch of flat surface has been very well presented in a number of works [3,4,5,6,7,8,9,10,11,12,13,14,15,16,17]. When punching with a flat face, the edge pressure on the sheet is uniform.…”

“…The intensity of the burr height increase depends on the speed of wear of blanking tool edges [4,5,6]. In the case of blanking thin sheets with special magnetic properties, it is important to choose the appropriate clearance, so the area of the hardened material will be the smallest [4].…”

“…Tool wear is particularly important when blanking thin sheets. The quality of the intersection surface in the blanking process is influenced by the type of punch material [5,6]. Works [4,5,6] present the influence of the punch material on its wear (tungsten carbide, M2, M3: 2).…”

“…The quality of the intersection surface in the blanking process is influenced by the type of punch material [5,6]. Works [4,5,6] present the influence of the punch material on its wear (tungsten carbide, M2, M3: 2). Tool wear depends on the size of the clearance, punch material, and sheet material [7,8,9,10,21,22].…”