Hole connection piece on a sheet-steel tub for a washing machine or dishwasher

摘要

Hole connection piece on a sheet-steel tub for a washing machine or dishwasher. When a hole connection piece is being drawn or pressed into a steel sheet consisting particularly of chrome-nickel steel, material cracks can occur. The stretching of the sheet particularly at the edge of the connection piece is so great that the limit of elasticity of the material can be exceeded. To prevent cracks, it is proposed to cut out the pre-hole 6 in a corrugated manner in such a way as to produce tongues 8 which, when the hole connection piece is being drawn or pressed, are bent and form abutments for a drawn-on run-off hose 3 secured by means of a hose clip 5. Material cracks are prevented by means of the corrugated design of the pre-hole. <IMAGE>