Development of manufacturing process of "Shaft" part

Contents

Contents

Introduction

1. Initial information for the development of the course project

2. General provisions

2.1 Service purpose and structural features of the part

2.2 Definition of production type

3. Part Manufacturing Process

3.1 Analysis of compliance of technical requirements and standards of accuracy with service purpose of the part

3.2 Analysis of workability of part design

3.3 Selection of the workpiece. Preliminary Feasibility Evaluation of Procurement Selection at Reduced Cost

3.4 Selection of process bases. Development of the part machining process route. Equipment selection

3.5 Calculation of allowance and limit dimensions for machining on one surface

3.6 Calculation of cutting modes per operation

3.7 Rationing of process operations per operation

3.8 Process Documentation

Conclusion

List of literature used

Appendix A

Appendix B

Appendix B

Appendix D

Appendix D

Job for Course Project

Topic: Development of manufacturing process of part "Shaft."

Source Data

Design drawing Part "Shaft," limit deviations of dimensions: shafts - h14, holes - H14, other ± IT 14/12. The mass of the part is 1.25 kg. Part material Steel 45 GOST 105088 .

Introduction

The production efficiency, its technical progress, quality of products in many respects depend on the advancing development of production of the new equipment, machines, machines and devices, on the global introduction of methods of the technical and economic analysis providing the solution of technical questions and cost efficiency of technological and design developments.

In accordance with this, the following tasks are solved in the course design process using mechanical engineering technology:

Expansion, deepening, systematization, and consolidation of students' theoretical knowledge and application of these knowledge for designing progressive technological processes of assembly of products and manufacturing of parts, including design of technological equipment;

development and consolidation of skills of independent creative engineering work;

mastering the methodology of theoretical and experimental studies of technological processes of mechanical assembly production.

The purpose of this course design is to develop the technological process of the part of the wheel gear sleeve, to select the most effective methods and tools for processing the part, which ensure maximum productivity, required accuracy at the minimum cost of processing in safe working conditions, to conduct a dimensional analysis.

The course project on production technology should reflect savings in labor costs, materials, energy, improvement in working conditions, compliance with environmental requirements. The solution of these complex design tasks is possible only on the basis of the fullest use of advanced technological equipment and equipment, the maximum economically justified degree of automation of design and production, the creation of flexible technologies

In course design, considerable attention is paid to the economic justification of procurement methods, selection of process options, etc., so that in the end the project proposes the optimal option.

Initial information for the development of the course project

The following data were provided as initial information in the course project:

Shaft drawing with the specified technical requirements, surface deviations and overall dimensions;

1K6207111 shaft working drawing, specification and requirements for shaft fabrication: workpiece material and hardness; configuration and overall dimensions of the shaft; requirements for accuracy of treatment of each surface (accuracy of dimensions performed, mutual arrangement of surfaces and roughness parameters);

Annual output program N = 50,000 pcs/year.

Part Manufacturing Process

3.1 Analysis of part design conformity

The working drawing of the machined part contains all the necessary information that gives a complete idea of ​ ​ the part, that is, all the projections perfectly clearly and uniquely explain its configuration and possible methods of obtaining a workpiece. The drawing shows all dimensions with the required limit deviations, the required surface roughness, permissible deviations from the correct geometric shapes, as well as the mutual position of the surfaces. The drawing contains all the necessary information about the part material, heat treatment, part mass.

Structural Steel 45 GOST 105088 is used to manufacture the rod. This material is used in the manufacture of cutting, measuring tools, springs, carburetor needles, piston compressor rods, parts of internal devices of devices and other various parts.

Steel grade is selected according to mechanical properties structurally obtained during friction pair calculation. Steel has high strength and viscosity. Rod surfaces operating under friction conditions and with high loads require high hardness of the surface layer - this is another condition in the choice of steel grade.

Conclusion

During the course project, all the necessary tasks were solved, allowing you to select and justify the best solutions at each stage of the process design. The analysis of the processability of the part design justified the possibility of its manufacture with the least cost when achieving the accuracy requirements specified in the drawing.

As a workpiece, hot rolled stock was chosen, the shape and dimensions of which are as close as possible to the shape and dimensions of the finished part .

In the course design presented above, an analysis of the processability of the design of the product and part was performed; analysis of the basic technological process and its shortcomings were found, in this regard, the technology of producing a shaft in serial production conditions was improved. A dimensional analysis of the developed process was also performed, which showed that the required accuracy of the part is provided by the selected processing methods; allowance and interoperative dimensions are calculated; operations cutting modes are assigned: these operations are normalized; The equipment is selected.

The choice of process route and processing methods ensures the specified accuracy of the part, and the selected equipment ensures the maximum processing performance.

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