TV-320

Contents

INTRODUCTION

1. GENERAL PART

Selection of machine analogue and prototype

Process characteristics of the design object

Brief description of analogue technological capabilities

2. PROCESS PART

Justification of technological capabilities

Calculation of cutting modes

Main drive motor selection

Process tooling

3. DESIGN PART

Kinematic calculation of the main motion drive

Strength calculation of drive parts

Spindle Assembly Description

Manual Machine Control Description

Description of the work of the schematic electrical circuit

CONCLUSION

List of literature used

Introduction

The technical level of any country is primarily determined by the state and development of machine tools, which is one of the leading industries.

But machine tool building, like any industry, needs constant development and improvement. For example, taking as a model the most advanced model of the machine, we on its basis designed a new machine and entered the domestic and external markets with it. It would seem that everything is very simple. However, this will have to do a great and long work: first choose the best sample (i.e. perform appropriate tests and studies), design a new machine, prepare production (develop technological processes and technological equipment, provide with materials, etc.), manufacture a prototype of the machine, having tested it, adjust the technological documentation, manufacture and test an experimental batch of machines, etc., and finally obtain permission for the right to mass production and establish the production of these machines.

It takes about 4-5 years to carry out all the listed works necessary for the industrial development of the machine. And considering that the same amount of time was previously spent on the creation and development of the machine, taken by us as a sample, then our new machine will come to the market with a lag behind today's achievements in science and technology at best by 810 years; that is, it is already obsolete. So that this does not happen, when developing a new machine, we should not go through the use of already known technical solutions in it, but design, that is, develop a new machine design not only at the level of modern technological achievements, but with laying in the project a certain margin of excellence and novelty of the solutions of each element in the machine against the already known, achieved. It is necessary that the designs of the created machines be promising, that is, meet the requirements of tomorrow.

It should be taken into account when creating a new machine - this is a complete reduction in the time for its design and development of its production. Therefore, the main

the purpose and task of the design work is to create machines that at the time of their delivery to the consumer would be at the level of the best world samples or even surpass it.

One of the main directions of the development of modern machine tool building is automation, which includes a set of measures (technical, organizational, etc.) that allow you to conduct production processes without the direct participation of a person.

An important area of ​ ​ automation is the use of various software management systems for metal cutting machines and automatic lines, especially systems with numerical software control.

In modern machines, various systems (mechanical, electrical, hydraulic and pneumatic) are increasingly used to continuously control the speeds of the main movement and supply, which allows you to work in more profitable cutting modes, changing them during the operation of the machine.

The purpose of the course project is to allow students to design the main elements of the machine themselves. Understand the principle of its operation and select processing modes for operations that can be carried out on the designed machine .

1.1.Selection of machine analogue and prototype

The following data were obtained to select the analogue and prototype of the machine:

a) Largest diameter of machined part:

above the bed - 320 mm.

b) = 1.26

Based on this, the TV320 turning-screw machine was chosen as an analogue.

1.3. Brief description of technological capabilities of analogue

TV320 is a high-speed specialized machine especially suitable for work in tool and instrument making.

The machine can also be used successfully for operations.

Unlike existing types of lathes, this model allows you to maximize the technological capabilities of the lathe when processing parts with high-speed turning and by combining operations.

In accordance with the requirements of this progressive method, the machine is equipped with a mechanism for changing the amount of supply on the run without its installation, and the handles for longitudinal and transverse movement of the caliper with limbs with a price of dividing the corresponding movement of the caliper by 0.1mm longitudinal and 0.01mm transverse. The apron limb has a division price of 0.1mm. The size of the lateral movement of the caliper allows the two cutters to simultaneously move the cutter head to both sides beyond the center line.

The machine is designed for turning of parts with cutters fixed on both front and rear cutters. Rear cutter holder is installed on the support as required. The cones are turned by transverse displacement of the center of the tailstock.

The spindle of the machine receives movement from the electric motor through a belt gear, a speed box, a second belt gear.

The screw-turning machine consists of the following main units: The frame, on which all movable units of the machine are mounted, cast iron, box section, connected by diagonal stiffening ribs.

The headstock in which the spindle, speed box or its part and speed box controls are placed is a cast iron box-shaped casting.

The feed box allows the speed of the longitudinal and transverse feeds to be varied and the movement from the headstock to the caliper can be transmitted by means of a lead roller or in the case of screw thread cutting.

Rear head is intended for attachment of right end of blank during processing in centers.

The caliper is designed to attach the tool and tell it the feed motion.

Apron secured on support and carrying mechanisms transmitting lengthwise and crosswise tool feed from feed box.

Pedestals on which the bed is installed at the required height, convenient for servicing the machine during its operation .

2.4. Process tooling

For machining on lathes, the blank can be installed in centers, in cartridges of four-cul or three-cul self-centering and on a mandrel.

To install the blank in the centers, the machine is equipped with front and rear centers and driving cartridges, which also has a driving pin.

Cutting of multi-start thread is possible using multi-cut (by number of starts) holders.

On lathes, the so-called vortex thread cutting is used, in which the cutter mounted in the rotating head acts as a cutter tooth. Such a method makes it possible to significantly increase the cutting speed, and therefore the productivity of threaded cutting.

When equipping lathes with special devices, it is possible to machine spherical surfaces on them, mill planes, spline adjustments, gears, and perform turning-copying and grinding operations.