How to buy the cam?

Cam is one of the core parts of circular knitting machine, its main role is to control the movement of the needle and sinker and the form of movement, can be divided into full out of the needle (into the circle) cam, half out of the needle (set circle) cam, flat knitting needle (floating line) cam and sinker cam.

Cam of the overall quality of the high and low, circular knitting machines and fabrics will have a great impact, so in the purchase of cams should pay special attention to the following points.

First of all, for different fabrics and fabric requirements to choose the corresponding cam curve. Because the designer of the fabric style pursuit of different, different emphasis, so the cam work surface curve will be different.

Secondly, due to the needle (or sinker) and cam in a long time in the high speed sliding friction state, individual process points at the same time to withstand the high frequency of impact, so the cam of raw materials and heat treatment process is very important. Therefore, the cam of raw materials are generally used in the national standard Cr12MoV (Taiwan standard / Japanese standard SKD11), the material hardenability, quenching deformation is small, quenched hardness, strength, toughness are more suitable for the requirements of the cam. cam of the quenching hardness is generally HRC63.5 ± 1. cam of the hardness is too high or too low will have adverse effects.

In addition, the roughness of the working surface of the cam curve is very important, it directly determines whether the cam is good, durable. The roughness of the working surface of the cam curve, by the processing equipment, tools, processing technology, cutting and other elements of a comprehensive decision (individual manufacturers of the cam price is very low, usually in this area to do articles). Roughness of the working surface of the cam curve is generally determined as Ra ≤ 0.8 um. Roughness of the working surface to do a poor job will cause the grinding needle heel, playing the needle, the cam seat heating and other phenomena, in addition, we should also pay attention to the triangular holes.

In addition, but also pay attention to the cam hole position, keyway, shape and the relative position of the curve and precision, these attention is not possible to produce adverse effects!