Course project in the discipline "Theory of mechanisms and machines"

Contents

Contents

1. Introduction

2. Job (Source Data)

3. Kinematic Mechanism Analysis

3.1 Structural analysis of the mechanism

Structure of the mechanism

3.3 Determination of missing dimensions

3.4 Determination of mechanism point speeds

3.5 Determination of accelerations of mechanism points

3.6 Output Link Movement Diagrams

3.7 Determination of angular velocities and accelerations

3.8 Determination of acceleration of mass centers of mechanism links

4. Power analysis of the mechanism

4.1 Gravity and inertia forces

4.2 Diad Calculation 4-

4.3 Calculation of Diad 2-

4.4 Crank Calculation

4.5 Determination of balancing force by Zhukovsky method

4.6 Capacity Determination

4.7 Determination of kinetic energy of the mechanism

5. Gearing Synthesis

5.1 Geometric calculation of equi-spaced involute gear engagement

5.2 Synthesis of planetary reduction gear box

5.3 Determination of gear speeds by analytical and graphical method

6. Synthesis of cam menhanism

7. Conclusion

8. List of literature

1. Introduction

The creation of a modern machine requires a comprehensive analysis of its design from the designer. The design must meet numerous requirements that are in conflict. For example, minimum dynamic loading must be combined with high speed, sufficient reliability and durability must be ensured with minimum dimensions and weight. The production and operation costs shall be minimal, but ensuring that the specified parameters are achieved. From a valid set of solutions, the designer selects a compromise solution with a certain set of parameters and performs a comparative assessment of various options. There are usually several numerical measures of solution performance, called quality criteria or objective function, by which to evaluate the design. The main criteria are identified, and auxiliary indicators are used as a restriction imposed on the elements of the solution. Currently, calculations are carried out on a computer, which allows you to evaluate the design according to many quality criteria and find the maximum performance indicator.

Conclusion

During the course project, drawings were made of the synthesis and analysis of the planetary mechanism, cam mechanism, power analysis of the mechanism and the synthesis of the lever mechanism. Consequently, knowledge of the theory of mechanisms and machines is enshrined.