DP Engineering Technology, Part Shaft

Contents

CONTENTS

Introduction

1 Analysis of source data

1.1 Brief description and service purpose of the part

1.2 Basic Process Analysis

1.3 Purpose and objectives of the diploma project

2 Process Design

2.1 Part design analysis and process control of the drawing

2.2 Definition of production type

2.3 Selection of workpiece production method

2.4 Development of routing process

2.5 Calculation of allowances and interoperative dimensions

2.6 Selection of equipment and equipment

2.7 Calculation of cutting modes and time standards

3 engineering of process equipment

3.1 Description of the Milling and Centering Tool

3.2 Description of the keyway milling tool

3.3 Power Calculation of Slot Milling Tool

3.4 Calculation of cutter for groove treatment b = 4 mm

3.5 Description of caliber prism for check of keyway 22N

4 Ensuring Life Safety

4.1 Process Analysis by Hazardous Factors

4.1.1 Protection against mobile parts of equipment

4.1.2 Protection against physical overloads

4.1.3 Protection against neuropsychic overload

4.1.4 Optimization of normal working conditions

4.2 Calculation of sound pressure level

4.3 Development of noise reduction measures at the site

5 Feasibility Calculations

5.1 Process Efficiency Assessment

5.1.1 Calculation of capital investments

5.1.2 Calculation of process cost

5.2 Calculation of basic parameters and operational planning of the serial production area

5.2.1 Calculation of manufacturing cycle duration of parts batch

CONCLUSION

LIST OF LITERATURE

Appendix A

Appendix B

Paper

The explanatory note contains ___ sheets, 9 figures, 23 tables, ___ sheets of format A1, 22 sources, 2 annexes.

PROCESS, WORKING STROKE, TRANSITION, FEED, SPEED, CUTTING TOOL, ACCESSORY.

The object of development is the vacuum pump shaft.

The purpose of the work is to develop a technological process for the manufacture of a vacuum pump shaft and its equipment in relation to the conditions of Penzcompressormash OJSC.

As a result of the work, a technological process for the manufacture of the Val part and its technological equipment were developed, allowing to master the production of this product at an industrial enterprise.

Degree of implementation - the developed technological process will be used at Penzcompressormash OJSC.

The developed process equipment can be used in the manufacture of parts of a similar class for vacuum pumps of other modifications and models.

The effectiveness of the developed technology is confirmed by the calculation given in the work.

Introduction

Compressor machines are designed to compress and move gases.

They work due to the mechanical energy supplied from the engine, that is, they are machine guns. In this regard, their introduction into industry historically depended not only on the level of development of the theory of these machines, but also on the presence of appropriate engine machines (steam engines, turbines, etc.).

There is practically no branch of the national economy where compressor machines are not used.

Rotary compressors and vacuum pumps with a liquid piston, commonly referred to as water rings, since water is most often used as a sealing liquid, have a number of advantages, such as simplicity of arrangement, manufacture, repair and operation. These machines are widely used in industry and especially in the chemical industry. Of particular importance are liquid ring machines when compressing gases that do not allow contact with lubricant, ignite at low temperature and low spark formation and decompose at high compression temperature. In these cases, other liquids, such as, for example, sulfuric acid in chlorine compression, are used as the sealing liquid instead of water.

Liquid ring machines work well in cases of evacuation and compression of media containing drip liquid in pumped gases, as, for example, in the operation of vacuum pumps in paper machines. Great usability can be achieved by using these machines as a self-suction device for centrifugal pumps.

Rotating impeller relative to machine body is located eccentrically. During operation of this vacuum pump and supply of liquid, a liquid ring is formed, concentrically located relative to the housing. A sickle-shaped space is formed between the wheel hub and this ring, which is used as a working volume for gas compression. In the end covers of the housing there are suction and delivery holes. The wheel usually has forward bent blades, by which the working volume is divided into separate cells. In these compressor machines, liquid plays the role of a resilient piston that compresses gas in the impeller cells, which can be considered as separate compressor cylinders. At the same time, the liquid here seals the compression cavities and reduces the leakage of the compressed gas.

The designs of vacuum pumps produced in different countries differ relatively little from each other. A typical example is the considered product "Vacuum Pump," developed and manufactured at the enterprise of Penzcompressormash OJSC. Shaft with impeller fitted on it is eccentrically installed in cylindrical housing. At both ends, the body is closed by lobes divided by partitions into three cavities: suction, pressure and water, located in the lower part and bordering the first two. Sucked air or gas enters and exits the impeller through holes in the fronts. On the discharge side, in addition to the pressurized gas discharge holes, there are a number of valves with rubber balls, which perform the same functions when operating in an uncountable mode. The shaft at the outlet of the machine body is sealed with a axle box with soft packing of through weaving. The water supplied through the pipeline to create a hydraulic gate in the axles provides an additional shaft seal. Shaft supports - self-aligning radial spherical ball bearings are located in separate cast iron housings. Suction and delivery pipelines are connected to corresponding branch pipes located on frontal walls. Excess water is also discharged from the cylinder through the discharge pipe together with compressed air or gas during operation of the machine. Similar machine designs are also produced by many companies abroad.

The productivity of a modern water-ring vacuum pump usually reaches 150? 170 m3/min. The pressure reaches 20 atm.

Usually, water-ring vacuum pumps create a vacuum of up to 95-97%.

Due to the development of chemical and a number of related industries, the requirements for gas compression and vacuum creation machines are increasing. As a result of this, a number of new designs and improvements of vacuum pumps have appeared, which allows expanding the scope of their application.

Gauge-prism description to check the displacement of keyway 22N9

Caliber - scale-free measuring tools designed to control and remove defective products from production.

The above caliber prism consists of the following parts: insert (pos. 1), prism (pos. 2), screw M66 × 25 according to GOST 149172. The principle of control using this gauge is as follows: using an insert (pos. 1) the gauge is installed in the key slot, then moves along its entire length. If the offset value of the slot is within the tolerance, therefore the prism edges always fit tightly against the shaft journal and movement of the gauge occurs without any problems.

Conclusion

The replacement of universal machines with CNC machines in the basic version of the technological process has led to increased processing accuracy, increased labor productivity, reduced production preparation cycle, and reduced labor input.

Analyzing the obtained technical and economic parameters of processing the part of the basic and design version, we see that the proposed technology is labor-saving and energy-saving.

Also, the cost of manufacturing the part is significantly reduced and capital investments in production are reduced.

The annual economic effect is 129,000 rubles.

You can conclude that a new process plan has been put into production.