Improving the abrasive resistance of a slide frame in a mortar mixer
| dc.contributor.author | Попов, Станіслав Вячеславович | |
| dc.contributor.author | Гнітько, Сергій Михайлович | |
| dc.contributor.author | Васильєв, Анатолій Володимирович | |
| dc.date.accessioned | 2020-09-07T10:48:58Z | |
| dc.date.available | 2020-09-07T10:48:58Z | |
| dc.date.issued | 2020 | |
| dc.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 suкfaced 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. | uk_UA |
| dc.identifier.doi | 10.15587/1729-4061.2020.193510 | |
| dc.identifier.uri | https://dspace.pdau.edu.ua/handle/123456789/8355 | |
| dc.subject | gas-flame surfacing | uk_UA |
| dc.subject | abrasive wear | uk_UA |
| dc.title | Improving the abrasive resistance of a slide frame in a mortar mixer | uk_UA |
| dc.type | Article | uk_UA |
| local.department | 4.2 Кафедра галузеве машинобудування | uk_UA |