A New Generation Mining Head With Disc Tool of Complex Trajectory / Głowica Urabiająca Nowej Generacji Z Narzędziami Dyskowymi O Złożonej Trajektorii

Gospodarczyk, P.; Kotwica, Krzysztof; Stopka, Grzegorz

doi:10.2478/amsc-2013-0069

Cited by 16 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Complete tools [8] and entire cutting heads [9] are often tested. The following articles concerned the adaptation of modern tools and machines to difficult conditions [10,11] and the use of disc tools as an alternative to conical picks [12,13]. Testing the quality of tools was also discussed to facilitate the selection of the best offer in public tenders [14].…”

Section: Introductionmentioning

confidence: 99%

Increasing the Durability of Tools for Forest Road Maintenance

et al. 2023

View full text Add to dashboard Cite

To ensure the care of forests, it is necessary to make them sufficiently accessible by forest roads. The basic working tool are hammers, or round shanks of various shapes, composed of a body and a tip. They are subject to a strong abrasive environment, which often leads to damage up to the complete destruction of the functional part of the tool. For these reasons, it is necessary to deal with the possibilities for increasing their lifetime. One of the possibilities of increasing the service life of these tools is hardfacing by welding. The article deals with the abrasive resistance of the original material of the tool and the hardfacing materials. Based on the chemical analysis of the base material of the tool, we found that the tool is made of manganese steel 38Mn6. This material was used as a standard and was compared with the hardfacing materials Abradur 58, E DUR 600, UTP DUR 600 and OK 84.58. Electron microscopy was used to evaluate the microstructure. Next, the Rockwell hardness measurement was performed on the samples. The original tool material 38Mn6 reached the lowest hardness value, namely, 21 HRC. The highest value was reached by the hardfacing material E DUR 600, namely, 59 HRC. Subsequently, a test of resistance to abrasive wear was performed according to GOST 23.208-79. Based on this test, we can conclude that the highest value of resistance to abrasive wear was achieved by Abradur 58. Even though the hardness of this coating was slightly lower than the hardfacing material E DUR 600, specifically 56 HRC, we can state that this hardfacing material (Abradur 58) achieved the best results among the investigated materials.

show abstract

Section: Introductionmentioning

confidence: 99%

Increasing the Durability of Tools for Forest Road Maintenance

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Many scholars at home and abroad have carried out research on the cutting angle of conical pick, and the research is divided into two categories. The first is to build the cutting test bed, and obtain the external load on the conical pick through the sensor (Gospodarczyk et al 2013). This method needs to invest a lot of money, from the research needs to spend time and economy is not adapted to the modern mining machinery design of high efficiency, reliability, low cost, low carbon economy requirements (Guo et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Influence of cutting angle on mechanical properties of rock cutting by conical pick based on finite element analysis

Qiao¹,

Zq²,

Zhu³

et al. 2021

Mining Scince

View full text Add to dashboard Cite

In view of the current situation that it is difficult to obtain the actual cutting force received by the conical pick of Continuous-Miner and to deal with the characteristics of the cutting force. By using contact dynamics, rock mechanics, and finite element methods, based on the display dynamics analysis program ANSYS/LS-DYNA and the Holmquist-Johnson-Cook model, the contact mechanical characteristics between conical pick and rock are analyzed. The resultant force was obtained by obtaining the force curve of the conical pick under X, Y and Z directions, analysis of cutting gear cutting speed of 2.5 m/s, cutting depth of 5, 10, 15, 20 and 25 mm, cutting angle of 30°, 35°, 40°, 45°, 50° parameters of the size of cutting force and cutting ratio energy consumption, thus, the best cutting angle of the conical pick is obtained. The conclusions are as follows: when the cutting depth and cutting speed are constant, and the cutting angle is 45°, the mean cutting force received by the conical pick is the least, the specific energy consumption is the least, and the cutting efficiency is the highest. The best cutting angle of the conical pick should be 45°; When the cutting angle and cutting speed are constant, the energy needed by the cutter to cut the rock increases with the increase of cutting depth. The research results provide a theoretical basis for improving cutting efficiency and cutting life, and for choosing cutting angle and cutting thickness.

show abstract

“…The use of grained raw materials requires their proper mechanical processing (comminution, classification -screening, enrichment, granulation, etc. ) (Feliks J., 2015;Gospodarczyk P., Kotwica K., Stopka G., 2013;Kotwica K., 2008;Mańczak K., 1976). In the mechanical processing basic and at the same time the most energy-consuming process is comminution (Ballantyne G. R., Powell M. S., 2014;Sidor J., Mazur M., 2015).…”

Section: Introductionmentioning

confidence: 99%

Determination of crushing energy during vibratory crushing

Mazur

2019

New Trends in Production Engineering

View full text Add to dashboard Cite

The paper presents a new method of determining the energy consumption for vibratory crushing. Using the laboratory vibratory jaw crusher with kinematic actuation of the jaws, the study of determining power consumption while crushing limestone and diabase was conducted. During the study, electrical energy used on the crushing process was measured as a function of changing design and kinematic parameters of the vibratory crusher, i.e.: jaws stroke, the outlet gap size and frequency of jaws vibration. The article presents program of the research, the laboratory test stand of the vibratory jaw crusher KW 40/1 and the test results. Comparing the theoretical crushing energy requirements, determined by the Bond hypothesis, with the values measured during tests a large differences were observed. Using the Bond hypothesis the Vibratory Work Indexes were determined for the tested materials. Their values are higher than limestone and diabase Work Indexes available in the known literatures. The explanation may be greater amount of energy transferred to the material during vibratory crushing, which results in much higher efficiency of the crushing process.

show abstract

A New Generation Mining Head With Disc Tool of Complex Trajectory / Głowica Urabiająca Nowej Generacji Z Narzędziami Dyskowymi O Złożonej Trajektorii

Cited by 16 publications

References 0 publications

Increasing the Durability of Tools for Forest Road Maintenance

Increasing the Durability of Tools for Forest Road Maintenance

Influence of cutting angle on mechanical properties of rock cutting by conical pick based on finite element analysis

Determination of crushing energy during vibratory crushing

Contact Info

Product

Resources

About