D-144 engine flywheel crankcase

Contents

Introduction

1. General part

1.1 Characteristics of the part

1.2 Initial Data for Course Engineering

2. Process Part

2.1 Definition of production type

2.2 Justification for selection of procurement method

2.3 Part Constructability Analysis

2.4 Selection of basing and fixing schemes of the part

2.5 Development of process route and equipment selection

2.6 Calculation of machining allowances

2.7 Calculation of cutting modes

2.8 Rationing of process operations

3. Patent research

3.1 Patent Search Results Reference

3.2 Patent Overview

4. Research Part

Use of water vapor as SOTs in metal cutting

5. Design Part

5.1 Machine Tool Design

5.1.1 Description of machine tool

5.1.2 Selection of basing scheme

5.1.3 Power calculation of machine tool

5.1.4 Calculation of machine tool for accuracy

5.2 Design of control device

5.2.1 Description of control device design

Conclusion

List of literature used

Introduction.

Mechanical engineering is a leading complex of industries. Much attention is paid to the development of mechanical engineering, the training of engineering and technical personnel for it .

A powerful engineering industry has been created in Russia.

The construction of a material and technical base and the need to continuously increase labor productivity based on modern means of production poses very important tasks for engineering. These include improving the quality of machines, reducing their material consumption, labor intensity and cost of production, normalizing and unifying their elements, introducing in-line production methods, as well as reducing the preparation time for the production of new facilities. The solution of these problems is ensured by improving the design of machines, improving the technology of their manufacture, using progressive means and methods of production. Of great importance in improving the production of machines are various kinds of devices.

The complexity of constructing technological processes in mechanical engineering causes a wide variety of device designs and a high level of requirements for them. Inadequate technological and design solutions when creating devices lead to an extension of the production preparation time, to a decrease in its efficiency.

The use of devices improves the efficiency and accuracy of processing, assembly and control; facilitating working conditions, reducing the number and skills of workers; strict regulation of the duration of operations; expansion of technological capabilities of equipment; improving safety of operation and reducing accident rate.

The devices shall be convenient and safe to operate, fast, sufficiently rigid to ensure the specified accuracy of processing, convenient for quick installation on the machine, which is especially important when periodically changing devices in mass production, simple and cheap to manufacture, available for repair and replacement of worn out parts.

The task of improving the technological quality assurance of machines, and first of all their accuracy, is relevant. Accuracy in mechanical engineering is of great importance for improving the operational quality of machines and for the technology of their production. Increased accuracy of workpieces production reduces labour intensity of machining, and increased accuracy of machining reduces labour intensity of assembly as a result of elimination of fitting works.

One of the main tasks of mechanical engineering technology is to study the patterns of technological processes and identify parameters, affecting which production can be intensified and its accuracy increased. Knowledge of these laws is the main condition for rational design of technological processes and application of computers, providing reduction of design time, facilitation of technologists' work, and obtaining optimal versions of the designed processes.

In the course project, based on the fundamental scientific provisions of mechanical engineering technology, an effective technology for processing the Carter flywheel part D1441002312 B2 was developed, the current technological process was worked out, the cutting modes and allowances were calculated and other work was carried out in accordance with the "Methodological guidelines for the implementation of the course project on mechanical engineering technology."

Initial data for course design.

Initial data for the development of the machining process of the "Flywheel Carter" part D1441002312 B2 include:

1. Basic information;

2. Background information;

3. Regulatory and technical information;

4. Scientific and technical literature;

Basic information is information that is collected in the conditions of the basic plant. This includes a detail working drawing with specifications and specifications; release program N, in my case is 30000 pieces per year; factory technology of part processing, namely machines, devices, measuring and cutting tools, time standards, cutting modes for each operation, allowances; available production area; manpower and technologists; the location where the process to be designed will be located; types of energy sources.

The reference information includes the information contained in the directories of the TMC, normalizer, metalworker, designer, etc.; catalogs produced by enterprises of the Russian Federation and foreign companies.

Regulatory and technical information includes GOST, CMEA standard, Russian standards, engineering norms, enterprise standards, etc.

Scientific and technical literature are monographs, scientific articles, dissertations, journals "Bulletin of Mechanical Engineering," "Mashinostroitel," etc.

In addition, the initial data are the labour and machine-tool capacity of the machining operations of the part "Flywheel Carter" D1441002312 B2, necessary for the calculation of the mechanical workshop; nomenclature of products manufactured in the workshop; valid fund of working time of equipment F = 2007.5 hours per year during 1 shift operation; the actual working time fund of workers F = 1840 hours when working on 1 shift; the number of shifts of the enterprise - 2 shifts.

5. Structural part

.

5.1 Design of machine tool.

The machine tool design being developed is mounted on the table of the longitudinal milling machine 6662 and enables operation 040 to mill the plane for an oil crankcase. Milling is carried out by milling (rough and finishing) 250 Z = 26 with longitudinal feeding of the table.

The accessory is special, single with pneumatic clamping and allows to perform:

- reliable attachment of processed parts with preservation of their stiffness during processing;

- stable provision of the required quality of treatment;

- increase of labor productivity due to reduction of labour intensity of installation and mechanization of part fixation.

5.1.1 Description of machine tool.

The accessory is installed on the table of the vertical milling machine on 2 keys and is attached to the table of the machine with four bolts. It consists of body on which elements of basing and fastening of blank are installed. 2 pneumatic cylinders are installed in the accessory. They are attached on the sides of the accessory housing. All pneumatic cylinders are controlled by common valve installed on the right side surface of accessory housing.

Fixation of the part in the accessory is performed in two stages. Initially, the part is oriented along the holes on the fingers, and then the part is clamped by pressing the contact surface with the help of levers. Ratio of levers arms from pneumatic cylinder to part 1:1. Force from pneumatic cylinder rod is transmitted to double-arm lever directly.

Operating procedure of the accessory. Part is installed on fixture plane and is pressed against fixed stops. When control valve of pneumatic cylinder is turned, air is supplied to lower chamber of cylinders, as a result of which pistons of vertical pressing move upwards together with rods and push the part. The part is then installed to provide the required accuracy. When air is supplied to the upper chamber of cylinders, the cylinder rods move upwards, removing the clamp, the part is detached.