O’zbekistоn respublikasi оliy va o’rta maxsus ta`lim vazirligi

Rice. 2.


Lab №3
STUDYING THE WEAR PROCESS OF SLIDING PAIRS

OBJECTIVE: To evaluate the wear process in friction pairs from various materials.

THEORETICAL INFORMATION: The main indicators characterizing the wear process are: the amount of wear and its speed. The rate of consumption per unit of time can be determined as follows:

Here: - the amount of wear.

The wear rate is determined by the ratio of the wear rate to the friction rate: .

REQUIRED TOOLS AND EQUIPMENT: Special stand (or metal

cutting machines), micrometer, indicator device, samples.

OPERATING PROCEDURE:

1. Study the presented scheme of the stand (Fig. 3).
2. Measure the samples and record their dimensions in the table.
3. Install one of the samples on the stand.
4. Run the test. Samples during the test, in a certain period of time is measured. Write it down in a table.
5. Based on the obtained results, build a graph of wear over time (Fig. 4).
6. Looking at the graph, draw a conclusion about the wear of friction pairs.

Name of indicator	Test results
	Shaft	Sleeve
Sample size, mm:
Before testing:
After test: 1
2
3
…
Sample size
time between measurements, min

Fig . 3 .

Rice. 4.

MINISTRY OF HIGHER AND SECONDARY SPECIAL EDUCATION OF THE REPUBLIC OF UZBEKISTAN

NAMANGAN ENGINEERING AND TECHNOLOGICAL INSTITUTE

«Approved» Vice-Rector for Academic Affairs _________________U.Meliboyev «___» __________ 2022 year

WORKING CURRICULUM at the rate

“TRIBOLOGY”
Branch of knowledge: 700 000 - Engineering, processing and construction industry
Branch of education: 720 000 - Industry of production and processing
Directions of education: 60720700- Technological machines and
equipment
General study hours – 240 hours
Including:
Lectures - 60 hours (30 hours 3-semester, 30 hours 4 semester)
Practical
classes - 30 hours (3-semester)
Laboratory
classes - 30 hours (14 hours 3-semester, 16 hours 4 semester)
Independent
work - 120 hours (75 hours 3-semester, 45 hours 4 semester)

Namangan - 2022

The working curriculum is based on the curriculum discipline "Fundamentals of tribotechnics" approved by protocol No. 1 dated 25.06.2022 of the Namangan Institute of Engineering and Technology.

The working curriculum was approved by the protocol of the Council of the Namangan Institute of Engineering and Technology No.1 dated 27.08. 2022.

Compiled by: A.Maxkamov - Associate Professor of the department "Technological machines and equipment" NamETI

Reviewers:
PhD, A.Mirzaumidov - Associate Professor of the Department "Technological machinery and equipment" NamETI
G. Payziev - Associate Professor of the Department "Technological machinery and equipment" NamECI

Dean of Engineering

technological
Faculty of NamETI
2022 year _________________ _______ А. Obidov
(sign)
department head
"Technological machines
and equipment"
2022 year «___»


1. Guidelines for teaching the academic discipline


"Tribology" studies the basic tribological patterns for solving specific design, technological and operational problems related to friction, wear and lubrication in machines and mechanisms, as well as the targeted selection of materials with the necessary physical and mechanical properties, degree of accuracy, surface quality and operating conditions of parts in mobile connections.
The main objective of the discipline is to study the basic tribological patterns for solving specific design, technological and operational problems related to friction, wear and lubrication in machines and mechanisms, as well as the targeted selection of materials with the necessary physical and mechanical properties, degree of accuracy, surface quality and operating conditions. parts in moving joints.
As a result of studying the course "Fundamentals of Tribotechnics", the Student must:
- basics of designing mechanisms; -requirements for parts, performance criteria and factors affecting them; - use design documentation to the extent sufficient to solve operational problems; to carry out a rational choice of structural and operational materials.
- master systematic information about the structure, properties of various metallic materials: - engineering terminology in the field of production of technological machines and equipment; skills in organizing the technical operation of technological machines and complexes.
- be able to analyze the conditions of influence of external environments and operating conditions for machine parts, tools, structures for various purposes, determine the requirements for the properties that the materials used must satisfy, select materials for the manufacture of products according to a given set of mechanical, physical and chemical properties (MPC).