Medium-chain conveyor with two-part scrapers, in particular double medium-chain conveyor

A process for manufacturing a medium-chain conveyor, comprising the steps of providing a conveyor part;

• arranging a plurality of two-part scrapers in the conveyor part;
• connecting said scrapers with a displacing system including a chain wheel and a chain belt guided over said chain wheel, forming said chain belt so that it has a plurality of horizontal round links and a plurality of vertical flat links alternating with one another;
• forming said chain wheel so that it has a plurality of chain wheel teeth including two halves which define therebetween a central slot for accommodating said vertical flat links and also including side links for accommodating said horizontal round links;
• removing material on a toothed flank in a direction of rotation of the chain wheel on the teeth of the chain wheel and adding material on a toothed flank which is opposite to the direction of rotation of the chain wheel, so as to make the teeth of the chain wheel asymmetrical in the direction of rotation of the chain wheel, arranging the scrapers including first hardening both scraper halves to a higher level;
• and then in different cross-sections of the scraper halves outside scraper tips, partially inductively tempering the scraper halves at different tempering temperatures, so as to retain previously achieved hardness only at the tips of the scraper halves.

A process for manufacturing a medium-chain conveyor, comprising the steps of providing a conveyor part;

• arranging a plurality of two-part scrapers in the conveyor part;
• connecting said scrapers with a displacing system including a chain wheel and a chain belt guided over said chain wheel, forming said chain belt so that it has a plurality of horizontal round links and a plurality of vertical flat links alternating with one another;
• forming said chain wheel so that it has a plurality of chain wheel teeth including two halves which define therebetween a central slot for accommodating said vertical flat links and also including side links for accommodating said horizontal round links;
• and removing material on a toothed flank in a direction of rotation of the chain wheel on the teeth of the chain wheel and adding material on a toothed flank which is opposite to the direction of rotation of the chain wheel, so as to make the teeth of the chain wheel asymmetrical in the direction of rotation of the chain wheel, arranging the scrapers including firstly hardening both scraper halves to a high level;
• fully relaxing the scraper halves;
• tempering the scraper halves in a salt bath at different temperatures and different depths of suspension of the scraper halves in such a way that a previously achieved hardness is only retained at the tips of the scraper halves.