Development of process, accessory, flow line for Shaft-Gear part

Introduction

Mechanical engineering is the most important industry. The improvement of engineering technology is determined by the needs of production of machines necessary for society and the need for constant improvement of products.

The perfection of the machine design is characterized by its compliance with the state of the art, cost-effectiveness in operation, as well as by the extent to which the possibilities of using the most economical and productive technological methods of its manufacture in relation to a given production and production conditions are taken into account.

The job for the diploma project is the gear part drawing. Process analysis of part, part material, surface hardness shall be performed. Why do you need to calculate machining allowances, select a workpiece, and draw up a part handling route. Then it is necessary to calculate the cutting modes from the operations of the process, then it is necessary to assign time standards for each operation, as well as to economically justify the profitability of the process.

In order to carry out this work in a certain sequence, a number of issues need to be addressed:

Consider the rationality of the procurement method for a given scale of production;

Compare compliance of the actual workpiece to the drawing with respect to actual processing allowances and other process requirements;

Correct selection of bases on operations of technological process, observance of the principle of uniformity of technological bases;

Correct installation of process flow to achieve specified accuracy of parts;

Degree of operation equipment

Only after a qualitative study of these issues will it be possible to satisfy all the requirements for the manufacture of the part and its quality.

General Section

Assigning a Part

The "Gear shaft" part enters the reduction gear assembly and serves to transfer torque from the input shaft of the electric motor to the output shaft of the reduction gear. The part belongs to the bodies of revolution, to the class "shaft."

Surfaces with diameter 50k6 are support surfaces, rolling bearings are installed on them. A surface with a diameter of 76.16h12 is designed to mount a gear wheel. The key slot serves to attach the wheel to the shaft.

According to the requirements of the drawing, the roughness parameters Ra = 6.3... 0.63. The surfaces of the part are made according to the 6... 14 quotas of accuracy. The highest accuracy quota is 6 assigned to the surface for bearings.

According to the drawing, it is required to ensure the tolerance of radial run-out of the surfaces for bearings with a diameter of 50k6 relative to each other - 0.04 mm, the tolerance of end-run-out of the surface with a diameter of 76.16h12 with a toothed rim relative to the common axis of FP 0.05.

Drawing number 3-106036

Part weight - 15 kg

Material: GOST 4543-71 steel 40XH

Dimensions: L = 208 mm, Ø 73.856 mm.