Open AccessStudying load of the cutting structure of rolling cutter bit depending on the errors of its manufacture
Author(s) -
V. A. Pyalchenkov,
Dmitry Vladimirovich Pyalchenkov,
V. V. Dolgushin,
G. A. Kulyabin
Publication year - 2019
Publication title -
izvestiâ vysših učebnyh zavedenij. neftʹ i gaz
Language(s) - English
Resource type - Journals
ISSN - 0445-0108
DOI - 10.31660/0445-0108-2019-1-113-120
Subject(s) - bit (key) , position (finance) , load distribution , production (economics) , structural engineering , mathematics , computer science , engineering , computer security , finance , economics , macroeconomics
The article deals with the results of experimental studies of the load of the cutting structure of rolling cutter bit depending on the errors of its manufacture. The results of field studies of bits indicate a significant decrease in the resistance of the supports of the rollers, the elements of the cutting structure and sinking on the bit with an increase in the height of the rollers. One of the reasons for reducing the resistance of supports and cutting structure in this case is the uneven distribution of the axial load in the sections. We have tested a batch of bits to establish quantitative regularities between the accuracy of bit production and the load of the cutting structure. The difference in height of chosen bits is varied from 0,34 to 1,28 mm. We have carried out the tests on a special stand, which allowed us to determine the value of the axial force acting on the individual crowns of each cutter bit. It is established that with an unfavorable combination of the mutual position of the rollers, even within the tolerance of the difference in height, the axial load acting on one roller can change almost twice. The results of studies allow investigating the appointment of indicators of accuracy of bit production more reasonable.