Machine speed box by model 6R82G

Contents

Contents

Introduction

1 Kinematic calculation of the drive

1.1 Design Option Selection

1.2 Selection of kinematic variant

1.3 Plotting of rotation speeds

1.4 Determination of gear gear numbers

2 Design part

2.1 Design calculations of typical drive parts

2.1.1 Determination of shaft diameter

2.1.2 Definition of gear wheel modules

2.1.3 Determination of initial diameters of gears and interaxles

distances

2.2 Check calculations of typical drive parts

2.2.1 Shaft Strength Check Calculations

2.2.2 Calculation of key connections

2.2.3 Calculation of splined joints

2.2.4 Calculation of spindle for stiffness taking into account compliance of supports

Select Calculation Scheme and Define Calculation Loads

3. Design Part

3.1 Layout of the main motion drive and principle of its operation

3.2 Arrangement of spindle assembly and adjustment of its bearings

3.3 Justification for selection of tolerances and fits

3.3.1 Spline Joint Fits

3.3.2 Fit gears on smooth shafts

3.3.3 Bearing fits

Conclusion

Literature

Paper

The design analyses the initial data from the point of view of clarifying the technical and dimensional characteristics of the machine in accordance with GOST N111, GOST 1809788, GOST 164372.

Kinematic and design calculations of the drive were given, which made it possible to determine the geometric dimensions of shafts, gears, bearings and other parts necessary for the development of a sketched drive layout. A sketched layout of the speed box and spindle assembly has been developed.

Test calculations for stiffness were carried out: spindle, shafts, splined and key joints to check their compliance with rigidity and accuracy standards as per GOST 37076.

To ensure kinematic accuracy of the drive, classes of accuracy of bearings, degree of accuracy of gears and splined joints, as well as their fits are selected.

In conclusion, conclusions are drawn on compliance of the main dimensions, standards of accuracy and rigidity of the machine with their values.

Introduction

The development of machine tool building, the quantitative and qualitative composition of the machine tool park largely determine the industrial potential of any country and characterize the level of its machine building.

Metal cutting machines occupy a special place among such machines as textiles, transport machines, light industry machines, printing machines, etc., because they are intended for the manufacture of machine parts, i.e. for the production of means of production. Therefore, machine tool construction is often called the core of mechanical engineering.

Modern metal cutting machines are very advanced machines that include a large number of mechanisms and use mechanical, electrical, hydraulic and other methods of movement and cycle control.

In terms of design and purpose, it is difficult to find more diverse machines than metal cutting machines. They process all kinds of parts - from the smallest axes, gears and levers for watches and devices to huge parts, the dimensions of which reach many meters, for turbines, rolling machines, ships. Therefore, the dimensions of the machines are very different. For example, the rotating table of one of the heavy carousels manufactured by the Kolomna Machine Tool Plant is equal in size to the circus arena, and a complex machine for processing manual watch parts is freely placed on a conventional table.

On machines, parts are processed from steels and cast iron, from colored, special heat-resistant, light, hard and other alloys, from plastics, wood, quartz, ferromagnetic alloys and other materials.

In design, various mechanisms using hydraulics, electrics, pneumatics are used to give the machine the required qualities and functions; They also use details of complex structural forms with high requirements for their quality indicators, introduce progressive design principles (aggregation, unification); search for the most rational layout of machines, develop new systems for control of the processing cycle.

Along with the development and improvement of existing processing methods in recent years, machines have appeared on the basis of fundamentally new technological processes. Such processes include electroerosion treatment using the effect of electric discharge on the metal; electrochemical processing methods, high energy focused beam treatment (e.g., quantum laser generator), ultra-high pressure fine jet treatment, ultrasonic method when the surface is exposed to abrasive particles when the instrument oscillates at a high frequency, and other methods.

To perform a variety of technological tasks with high requirements for product quality and process performance in machines, it is necessary to use the latest technological achievements.

The initial stage of machine development is characterized by the use of mechanisms that facilitate the work of the worker, but do not make fundamental changes in the course of the technological process. Such machine tools have survived to the present day - they are an electric drill for drilling, manual tool sharpening machines, and other similar machines, although they have a modern electric drive, but when used, the course of the process is completely dependent on the qualification of the worker.

Conclusion

Based on the analysis of the initial data in the design, the technical and dimensional characteristics of the machine in accordance with the normal machine tool construction N11 1 and GOST 16581 were updated and corrected.

The design adopts the standard shape and dimensions of the front end of the spindle (GOST 2464481), allowing you to attach a cutting tool in it. All mounting and connecting dimensions of the spindle are aligned with the corresponding dimensions of the main motion drive.

The project proposes a justification for the selection of the required accuracy class of spindle bearings, speed box shafts, the degree of accuracy of gears and main mounting dimensions, which generally meets the requirements of accuracy and rigidity standards as per GOST 1773472.

6Р82Г Развёртка.cdw

6Р82Г Свёртка.cdw

6Р82Г Развёртка+свёртка.spw