Transition between relieved and unrelieved modes when cutting rocks with conical picks
In the modern theory of rock cutting in production conditions, it is customary to distinguish two large classes of achievable cutting modes – relieved and unrelieved. The kinematics of rock-breaking machines in most cases determines the operation of the cutting tool in both modes in one cycle of the...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Saint-Petersburg Mining University
2021-09-01
|
| Series: | Записки Горного института |
| Subjects: | |
| Online Access: | https://pmi.spmi.ru/index.php/pmi/article/view/13587?setLocale=en_US |
| _version_ | 1828058214662406144 |
|---|---|
| author | Evgenii A. Averin Aleksandr B. Zhabin Andrey V. Polyakov Yurii N. Linnik Vladimir Yu. Linnik |
| author_facet | Evgenii A. Averin Aleksandr B. Zhabin Andrey V. Polyakov Yurii N. Linnik Vladimir Yu. Linnik |
| author_sort | Evgenii A. Averin |
| collection | DOAJ |
| description | In the modern theory of rock cutting in production conditions, it is customary to distinguish two large classes of achievable cutting modes – relieved and unrelieved. The kinematics of rock-breaking machines in most cases determines the operation of the cutting tool in both modes in one cycle of the cutting tool. The currently available calculation methods have been developed for a stable, usually unrelieved cutting mode. In this article, the task is set to determine the conditions for the transition between cutting modes and the modernization of the calculation method for determining the forces on the cutting tool. The problem is solved by applying methods of algebraic analysis based on the search for the extremum of the force function on the cutter, depending on the ratio of the real cut spacing to the optimal spacing for the current chip thickness. As a result of solving the problem, an expression is obtained for determining the chip thickness, for which, at the specified parameters, the transition between the relieved and unrelieved cutting modes is provided. The obtained result made it possible to improve the method of calculating the forces on the cutting tool in the areas of the cutter movement with relieved cutting. |
| first_indexed | 2024-04-10T21:23:50Z |
| format | Article |
| id | doaj.art-4d85654980a545058b6cabb60b993245 |
| institution | Directory Open Access Journal |
| issn | 2411-3336 2541-9404 |
| language | English |
| last_indexed | 2024-04-10T21:23:50Z |
| publishDate | 2021-09-01 |
| publisher | Saint-Petersburg Mining University |
| record_format | Article |
| series | Записки Горного института |
| spelling | doaj.art-4d85654980a545058b6cabb60b9932452023-01-20T02:04:53ZengSaint-Petersburg Mining UniversityЗаписки Горного института2411-33362541-94042021-09-0124932933310.31897/PMI.2021.3.113587Transition between relieved and unrelieved modes when cutting rocks with conical picksEvgenii A. Averin0Aleksandr B. Zhabin1https://orcid.org/0000-0001-5305-4908Andrey V. Polyakov2https://orcid.org/0000-0002-0067-6954Yurii N. Linnik3https://orcid.org/0000-0003-3968-0026Vladimir Yu. Linnik4https://orcid.org/0000-0001-5130-8222LLC “Skyratovsky Experimental Plant”Tula State UniversityTula State UniversityState University of ManagementState University of ManagementIn the modern theory of rock cutting in production conditions, it is customary to distinguish two large classes of achievable cutting modes – relieved and unrelieved. The kinematics of rock-breaking machines in most cases determines the operation of the cutting tool in both modes in one cycle of the cutting tool. The currently available calculation methods have been developed for a stable, usually unrelieved cutting mode. In this article, the task is set to determine the conditions for the transition between cutting modes and the modernization of the calculation method for determining the forces on the cutting tool. The problem is solved by applying methods of algebraic analysis based on the search for the extremum of the force function on the cutter, depending on the ratio of the real cut spacing to the optimal spacing for the current chip thickness. As a result of solving the problem, an expression is obtained for determining the chip thickness, for which, at the specified parameters, the transition between the relieved and unrelieved cutting modes is provided. The obtained result made it possible to improve the method of calculating the forces on the cutting tool in the areas of the cutter movement with relieved cutting.https://pmi.spmi.ru/index.php/pmi/article/view/13587?setLocale=en_UScutting moderelieved modeunrelieved modeconical pickmechanical destruction of rocks |
| spellingShingle | Evgenii A. Averin Aleksandr B. Zhabin Andrey V. Polyakov Yurii N. Linnik Vladimir Yu. Linnik Transition between relieved and unrelieved modes when cutting rocks with conical picks Записки Горного института cutting mode relieved mode unrelieved mode conical pick mechanical destruction of rocks |
| title | Transition between relieved and unrelieved modes when cutting rocks with conical picks |
| title_full | Transition between relieved and unrelieved modes when cutting rocks with conical picks |
| title_fullStr | Transition between relieved and unrelieved modes when cutting rocks with conical picks |
| title_full_unstemmed | Transition between relieved and unrelieved modes when cutting rocks with conical picks |
| title_short | Transition between relieved and unrelieved modes when cutting rocks with conical picks |
| title_sort | transition between relieved and unrelieved modes when cutting rocks with conical picks |
| topic | cutting mode relieved mode unrelieved mode conical pick mechanical destruction of rocks |
| url | https://pmi.spmi.ru/index.php/pmi/article/view/13587?setLocale=en_US |
| work_keys_str_mv | AT evgeniiaaverin transitionbetweenrelievedandunrelievedmodeswhencuttingrockswithconicalpicks AT aleksandrbzhabin transitionbetweenrelievedandunrelievedmodeswhencuttingrockswithconicalpicks AT andreyvpolyakov transitionbetweenrelievedandunrelievedmodeswhencuttingrockswithconicalpicks AT yuriinlinnik transitionbetweenrelievedandunrelievedmodeswhencuttingrockswithconicalpicks AT vladimiryulinnik transitionbetweenrelievedandunrelievedmodeswhencuttingrockswithconicalpicks |