The influence of parameters of the resistance projection welding of M10 steel nuts to the galvanized steel sheet DP 600 on selected joint characteristics

Abstract

Projection welding belongs to the group of resistance welding technologies. The basic process parameters are the welding current and the current flow time. The resistance projection weldability of the fasteners on metal sheets is not as well understood as the resistance spot weldability of the sheets, so complex studies for the wider application of resistance welding of nuts in the automotive industry are still needed. This research is aimed at valuation the effect of resistance projection welding parameters (steel nuts on galvanized steel sheet DP 600) on joint properties. The hard welding mode (high welding current, clamping force and short welding time) provided 2 times higher strength of the weld joints as the soft welding mode. When using the soft welding mode, an increased Zn concentration from the sheet metal coating was measured in the transition area between the welded materials at the folding locations. When applying the hard welding mode, only a slight increase in the Zn concentration was observed at the inner boundary of the weld joint.

Optimasi Parameter Pengelasan pada Proses Pengelasan Tahanan Listrik Komponen Bracket Rear Console untuk Peningkatan Masa Pakai Elektroda

“…Dasar parameter processnya adalah arus listrik dan waktu aliran arus tersebut. Proses pengelasan nut dan baut tidak semudah untuk dipahami jika dibandingkan pengelasan tahanan listrik antara plat dengan pelat sehingga penelitian yang lebih komplek masih tetap dibutuhkan [14] .…”

Investigation on the Effect of Projection Types on Stud Weld Strength by Taguchi Method

“…For this reason, reducing energy and material losses in methods commonly used in industries is a priority issue. One of the most common methods used in the automotive industry for assembling parts together is projection welding [1,2,3]. There are more than 350 projection welded joints in a vehicle body [4].…”

“…Projection welding is performed by the formation of a heat-affected zone (HAZ) on the material being welded by the force exerted by two copper electrodes [5]. This welding technique is a modification of the resistance welding method [2]. Welding current, welding time and electrode strength are important parameters for weld quality in projection welding as in spot welding [6].…”

Microstructure and Properties of Phosphorus Bronze/Brass Joints Produced by Resistance Projection Welding

“…Therefore, it is perfectly applied to copper and copper alloys resistance welding, due to the generally high conductivity of these materials [11]. Recently, many studies on RPW have been reported, including its physical mechanism [10][11][12], parameters optimization [13][14][15][16][17][18][19][20][21][22], microstructure characterization [20][21][22][23][24][25], and numerical process simulation [16,26]. Wehle et al [10] revealed that projection welding can be accounted for in the solid-state welding process, where the intimate weld interface is formed under plastic deformation at elevated temperatures and surface diffusion which enables re-arrangement of the interface to perfectly fit.…”