Improving the abrasive resistance of a slide frame in a mortar mixer
A method has been proposed for machining the outer and inner conical surfaces of the wrist pin and insert, which represent a sliding friction pair on the mortar mixer frame. The machining implies the application on the conical surface of parts, preliminary prepared through turning, of a wear-resista...
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doaj-92fe093a69dd40f68cf36062c525e0da2020-11-25T01:12:54ZengPC Technology CenterEastern-European Journal of Enterprise Technologies1729-37741729-40612020-02-0111 (103)61410.15587/1729-4061.2020.193510193510Improving the abrasive resistance of a slide frame in a mortar mixerStanislav Popov0Sergiy Gnitko1Anatoly Vasilyev2National University «Yuri Kondratyuk Poltava Polytechnic» Pershotravnevyi ave., 24, Poltava, Ukraine, 36011National University «Yuri Kondratyuk Poltava Polytechnic» Pershotravnevyi ave., 24, Poltava, Ukraine, 36011National University «Yuri Kondratyuk Poltava Polytechnic» Pershotravnevyi ave., 24, Poltava, Ukraine, 36011A method has been proposed for machining the outer and inner conical surfaces of the wrist pin and insert, which represent a sliding friction pair on the mortar mixer frame. The machining implies the application on the conical surface of parts, preliminary prepared through turning, of a wear-resistant material in the form of a hard alloyed nickel-based powder. It is applied with a special burner with a hopper-dispenser filled with powder. The result of mixing a combustible gas (acetylene and oxygen) in the burner with the powder from the hopper is melting. In the course of implementing a given technological process, by using mathematical modeling methods, we have determined the optimal mode parameters (PG10N-01 powder consumption is 33.5 g/min.; oxygen flow rate is 7.0 l/min; acetylene pressure is 0.043 MPa) for the gas-flame surfacing, which ensured maximum effect, that is, the greatest strength of adhesion (45 MPa) for the surfaced coating. The surfaced coating quality was checked by using a pin method for determining the adhesion strength between the new coating and the base on a tensile testing machine. A series of experimental studies into the enhancement of abrasive resistance of a sliding frame, namely a comparison of the surfaced coating with other well-known wear-resistant materials such as steel ShKh15, KhVG, were carried out at a specially designed experimental bench. Its structure is based on a vertically drilling desktop machine adjusted to the conditions of a working process that occurs inside the body of a mortar mixer. These include an abrasive medium, and the radial and axial efforts. To determine the axial load on a frame, we have proposed a structure of the hydraulic device, which includes a pressure gauge, a piston, a sleeve, and a ball. The axial load has been found for the most unfavorable conditions of mixer operation. Its value was implemented at an experimental wear bench. In addition, we have performed a series of experimental studies to determine an optimum angle of the cone at the apex of the wrist pin and insert in a conical slide frame for the minimal wear. Using the proposed technique of a gas-flame surfacing could significantly improve the abrasive and corrosion resistance of a slide frame, thereby prolonging the lifespan of a mortar mixer in general, as well as the overhaul cycle for equipment designed to prepare soluble mixtures used for constructionhttp://journals.uran.ua/eejet/article/view/193510gas-flame surfacingabrasive wearslide framehard alloyed powdertechnological process |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Stanislav Popov Sergiy Gnitko Anatoly Vasilyev |
spellingShingle |
Stanislav Popov Sergiy Gnitko Anatoly Vasilyev Improving the abrasive resistance of a slide frame in a mortar mixer Eastern-European Journal of Enterprise Technologies gas-flame surfacing abrasive wear slide frame hard alloyed powder technological process |
author_facet |
Stanislav Popov Sergiy Gnitko Anatoly Vasilyev |
author_sort |
Stanislav Popov |
title |
Improving the abrasive resistance of a slide frame in a mortar mixer |
title_short |
Improving the abrasive resistance of a slide frame in a mortar mixer |
title_full |
Improving the abrasive resistance of a slide frame in a mortar mixer |
title_fullStr |
Improving the abrasive resistance of a slide frame in a mortar mixer |
title_full_unstemmed |
Improving the abrasive resistance of a slide frame in a mortar mixer |
title_sort |
improving the abrasive resistance of a slide frame in a mortar mixer |
publisher |
PC Technology Center |
series |
Eastern-European Journal of Enterprise Technologies |
issn |
1729-3774 1729-4061 |
publishDate |
2020-02-01 |
description |
A method has been proposed for machining the outer and inner conical surfaces of the wrist pin and insert, which represent a sliding friction pair on the mortar mixer frame. The machining implies the application on the conical surface of parts, preliminary prepared through turning, of a wear-resistant material in the form of a hard alloyed nickel-based powder. It is applied with a special burner with a hopper-dispenser filled with powder. The result of mixing a combustible gas (acetylene and oxygen) in the burner with the powder from the hopper is melting.
In the course of implementing a given technological process, by using mathematical modeling methods, we have determined the optimal mode parameters (PG10N-01 powder consumption is 33.5 g/min.; oxygen flow rate is 7.0 l/min; acetylene pressure is 0.043 MPa) for the gas-flame surfacing, which ensured maximum effect, that is, the greatest strength of adhesion (45 MPa) for the surfaced coating. The surfaced coating quality was checked by using a pin method for determining the adhesion strength between the new coating and the base on a tensile testing machine.
A series of experimental studies into the enhancement of abrasive resistance of a sliding frame, namely a comparison of the surfaced coating with other well-known wear-resistant materials such as steel ShKh15, KhVG, were carried out at a specially designed experimental bench. Its structure is based on a vertically drilling desktop machine adjusted to the conditions of a working process that occurs inside the body of a mortar mixer. These include an abrasive medium, and the radial and axial efforts. To determine the axial load on a frame, we have proposed a structure of the hydraulic device, which includes a pressure gauge, a piston, a sleeve, and a ball. The axial load has been found for the most unfavorable conditions of mixer operation. Its value was implemented at an experimental wear bench. In addition, we have performed a series of experimental studies to determine an optimum angle of the cone at the apex of the wrist pin and insert in a conical slide frame for the minimal wear.
Using the proposed technique of a gas-flame surfacing could significantly improve the abrasive and corrosion resistance of a slide frame, thereby prolonging the lifespan of a mortar mixer in general, as well as the overhaul cycle for equipment designed to prepare soluble mixtures used for construction |
topic |
gas-flame surfacing abrasive wear slide frame hard alloyed powder technological process |
url |
http://journals.uran.ua/eejet/article/view/193510 |
work_keys_str_mv |
AT stanislavpopov improvingtheabrasiveresistanceofaslideframeinamortarmixer AT sergiygnitko improvingtheabrasiveresistanceofaslideframeinamortarmixer AT anatolyvasilyev improvingtheabrasiveresistanceofaslideframeinamortarmixer |
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