Disc knife sharpening device for cutting knives

The quality of disc cutter sharpening is important to the garment industry, affecting production efficiency and tool life. The main problem of small sewing enterprises is the lack of universal and highly efficient devices that would provide an opportunity to qualitatively and inexpensively restore the disc cutters used by the enterprise. Existing machines for sharpening disk knives provide the opportunity to restore knives with high quality, but they either require additional adaptation, a certain qualification of personnel to work on them and, at the same time, do not ensure a high stability of sharpening of individual faces of disk knives, which can lead to an increased level of danger, or the high cost of the equipment and the need to have highly qualified specialists on staff to work with it do not allow a small sewing company to purchase it. Thus, the task of developing an easy-to-use and reliable device for sharpening disk knives using a universal sharpening machine for small sewing enterprises is urgent. Based on the analysis of sharpening kinematics, a kinematic diagram of a universal device for sharpening disk knives in a wide range of knife diameters and with different numbers of faces was developed. The analysis of possible structural designs of individual nodes of the kinematic scheme made it possible to design, on the basis of simple structural designs, an easy-to-use, reliable, and safe device that will allow the restoration of disc knives with high quality and reliability, with constant stability, which does not depend on the operator. To expand the technological capabilities, taking into account the demands of sewing enterprises, the device was equipped with a mechanism for adjusting the angle of sharpening knives, built on the basis of a sine mechanism, which allows you to precisely adjust the angle of sharpening, as it affects the functional purpose of the disc knife, that is, the material of the fabric to be cut.