DOI: https://doi.org/10.32515/2664-262X.2025.11(42).1.75-83

Technological Features of the Production of Shredder Knives on Screw Spirals

Ivan Нevko, Andrii Diachun, Taras Dubynyak, Oleg Stibailo, Andriі Gupka

About the Authors

Ivan Нevko, Professor, Doctor in Technics (Doctor of Technic Sciences), Ternopil National Technical University named after Ivan Pulyu, Ternopil, Ukraine, e-mail: gevkoivan1@ukr.net, ORCID ID: 0000-0001-5170-0857

Andrii Diachun, Associate Professor, PhD in Technics (Candidate of Technics Sciences), Ternopil National Technical University named after Ivan Pulyu, Ternopil, Ukraine, e-mail: dyachun_andriy@ukr.net, ORCID ID: 0000-0003-1354-9468

Taras Dubynyak, Associate Professor, PhD in Technics (Candidate of Technics Sciences), Ternopil National Technical University named after Ivan Pulyu, Ternopil, Ukraine, e-mail: d_taras@ukr.net, ORCID ID: 0000-0003-1529-6951

Oleg Stibailo, post-graduate, Ternopil National Technical University named after Ivan Pulyu, Ternopil, Ukraine, e-mail: oleh.stibailo@gmail.com, ORCID ID: 0009-0007-9680-5426

Andriі Gupka, Associate Professor, PhD in Technics (Candidate of Technics Sciences), Ternopil National Technical University named after Ivan Pulyu, Ternopil, Ukraine, Україна, e-mail: gypkab@gmail.com, ORCID ID: 0000-0002-7565-5664

Abstract

Screw working bodies equipped with chopper knives and similar blade elements are used in various sectors of the economy, such as construction, food and processing, mining, road construction, etc. Their use often provides a combination of various technological operations related to the transformation of agricultural and other products, in particular grinding, mixing and moving. However, they found the widest use in the means for the production of materials, compound feed and other agricultural feed for feeding cattle, pigs, other animals and poultry. And taking into account the significant costs of preparing fodder from root crops in animal husbandry, which include their grinding, the problem of making shredding knives on auger spirals is quite important. The purpose of the work is the technological design of the manufacturing process of shredder knives on auger spirals. The production of chopper knives on screw spirals is a rather complex process that involves the performance of a certain set of multi-disciplinary operations. To date, separate technologies for the production of shredding knives on auger spirals have been developed. They provide for the production of shredding knives on screw spirals using hand tools and mechanized methods with preliminary cutting to a certain depth of the outer edge wound with a dense package on the edge of the screw spiral with subsequent bending of the shredding knives on it for use frame and roller equipped with special forming bushings. However, the developed processes are quite complex and require improvement. In order to reduce the energy consumption and labor intensity of the process of manufacturing shredder knives on screw spirals, we have proposed a new technological process. A technological process for the production of shredder knives on auger spirals wound with a dense package on an edge has been developed with the following basic operations: calibration of an auger spiral wound with a dense package on an edge to a certain step; boring of the outer edge of the spiral of the auger; sharpening the outer edge of the screw spiral; cutting the outer edge of the auger spiral to a certain depth with the appropriate step in order to obtain blanks for shredding knives; bending the chopper knives on the auger spiral to a certain angle; calibration of the auger helix with manufactured shredder knives to a set pitch. Schemes for boring and sharpening the outer edge of the auger spiral, cutting the outer edge of the auger spiral to obtain blanks for shredder knives, their bending, as well as calibration of the auger spiral with manufactured shredder knives to the required step have been developed. Based on the need to manufacture chopper knives with a height of 5...40 mm on screw spirals with a diameter of 50...250 mm, the longitudinal feed of the lathe caliper should be at least a few millimeters greater than the specified height of the chopper knives. This is caused by the fact that when further bending of the chopper knives, their outer edge should not lie or touch the bend line of the chopper knives, which are made on the following sections. The need to ensure the required height of the chopper knives on the spirals of the screws determines the selection of the appropriate equipment (lathe) involved in further operations. Taking into account these limitations, the structural and technological parameters of the boring and sharpening of the outer edge of the auger spiral were established, as well as the structural and technological parameters of the operations for the production of chopper knives on the auger spiral.

Keywords

chopper knives, auger spiral, screw working body, method, technology, technological process

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Copyright (c) 2025 Ivan Нevko, Andrii Diachun, Taras Dubynyak, Oleg Stibailo, Andriі Gupka