Development of the process of restoration of the drive bevel gear of the main gear of the GAZ-53-12 car

Contents

Introduction

1 Development of part recovery process

1.1 Description of part operating conditions and list of possible

part defects

1.2 Development of part recovery route

1.3 Calculation of process operation modes and

determination of technical time standards for their implementation

2 Organization of work place for technical support

process

2.1 Selection of equipment, cutting and measuring tools,

process accessories

2.2 Define Part Recovery Program

2.3 Organization of part recovery workstation

3 Evaluation of part repairability

4 Process Feasibility Study

restoring a part

Conclusion

List of sources used

Introduction

Car repair is an objective necessity, which is due to technical and economic reasons.

Firstly, the need of the national economy for cars is partially satisfied through the operation of repaired cars. Secondly, the repair ensures the continued use of those elements of cars that are not completely worn out. As a result, a significant amount of past labor remains. Thirdly, repairs contribute to saving materials for the manufacture of new cars. When restoring parts, the consumption of materials is 20... 30 times lower than when making them.

Numerous studies have shown that the first overhaul, as a rule, is more profitable than the purchase of a new car in all aspects of the cost-effectiveness of public labor. This is due to two possible circumstances:

- actual costs for the first overhaul of most types of machinery and equipment do not exceed 3040% of their book value, while repeated repairs are much more expensive;

- Most types of machines undergo the first overhaul, as a rule, before moral wear.

The total number of parts in modern cars is thousands of items. However, the number of parts that limit their service life until overhaul does not exceed several dozen items. The task is to increase the durability of these parts to the level that ensures the greatest durability of the car.

Along with the search for ways and methods to increase reliability, which is embedded in the design of the car during design and is introduced in the field of production, it is necessary to find ways and methods to solve the same problem in the field of operation and repair. The actual will depend on how reasonably the life of cars will be used in operation.

its service life until overhaul.

Car repair production, having received significant development, has not yet fully realized its potential. In terms of its efficiency, organizational and technological level, it is still lagging behind the main production of the automotive industry. The quality of repairs remains low, the cost is high, the level of mechanization reaches only 25... 40%, as a result of which labor productivity is twice as low as in the automotive industry. The automotive repair plant (ARP) is equipped mainly with universal equipment of a large degree of wear and tear and low accuracy. These are the negative aspects of the modern state of auto repair production and determine the ways of its development.

Conclusion

During the course design process, the process of restoring the drive bevel gear of the main gear of the GAZ53 car was developed. The part operation conditions and possible defects were analyzed. A gear defect map has been developed. Possible recovery methods for each defect were analyzed.

The main defect is wear of the shaft necks for bearings. From the possible methods of repairing the main defect, the optimal method was chosen - the method of forced remaining, followed by grinding the necks to a nominal size.

The main time to restore the part was 61.68 minutes. The necessary equipment, process equipment, cutting and measuring tools are selected for performance of technological operations. Technical time standards for performance of technological operations were calculated. The production program for the gear restoration was calculated, the area of the production room for the implementation of the process of restoration was determined, which amounted to 132 m2, and a justification was given for the organization of the work place and the choice of the planning solution. The designed planning solution enables efficient implementation of the process of recovery of the main gear drive bevel gear.

Evaluation of the repairability of the part showed that the driving bevel gear of the main gear has good repairability.

The technical and economic evaluation of the project was carried out according to the main indicators, which makes it possible to talk about a fairly high economic efficiency of restoring the main gear drive bevel gear by the chosen methods and means of production.