TECHNICAL AND ECONOMIC SUBSTITUTION OF METHODS FOR MANUFACTURING SCREW ROLLERS EQUIPPED WITH BLADES, CUTTING AND CRUSHING ELEMENTS

Abstract

The article presents and analyzes five technological methods for manufacturing blade, cutting, or grinding elements on winding spirals with their main design and technological parameters. In particular, three methods with the predominant use of manual labor and two mechanized ones. It has been established that the first three methods are high-cost, low-productivity, and labor-intensive, and do not provide high manufacturing accuracy, but can be widely used in single-unit production. The fourth method is much more effective in technical and economic terms, however, in the process of its implementation, the manufactured elements are gradually superimposed on each other, which leads to a gradual reduction in the curved profile on subsequent elements and the loss of their given geometric shape. The most effective is the fifth method, which eliminates the main disadvantages of the previous methods and ensures their production with significantly higher quality characteristics.

The results of the economic calculation of the production cost of manufacturing blade, cutting or grinding elements on a winding spiral with a length of 1 m/s showed that its value for the first method is 537.46 UAH, for the second method - 505.0 UAH, for the third method - 1127.81 UAH, for the fourth method - 166.83 UAH, and for the fifth method it is the smallest and is 148.08 UAH