ANALYSIS OF THE FORCES GENERATED DURING THE CLIPPING OF TRAVELERS ONTO RINGS

The first stress on a traveller occurs while clipping it onto the ring flange. To clip a C-shaped traveller onto the appropriate T-flange, a force of 1 to 10 N is necessary, depending on the material and geomet ry of the cross section. During this operation, very high local tensio ns can arise in the traveller because of its small dimensions. Plastic deformation of the traveller material or damage to the traveller surf ace or its plating can result. It is interesting to know the tensions that arise in the ring traveller contact zone and at the point of the yam path area. During spinning, the traveller undergoes high mechanica l and thermal stress in the contact zone, and so damage (i. e., cracks , scratches, and detachment of coatings) leads to an accelerated break down of the traveller. If there is any damage of the coating during cl ipping, the performance of the ring/traveller system will be poor; the refore, ii: is important to thoroughly examine the clipping procedure.