Cutting Tool Course Project

Contents

Task

Contents

Introduction

1. DESIGN AND CALCULATION OF SHAPED RHIZMATIC CUTTER

2. DESIGN AND CALCULATION OF SHAPED DRAWING OF GENERATOR CIRCUIT OPERATING

3. DESIGN AND CALCULATION OF WORM TOOTH-CUTTING

MILLS

Conclusion...... 28 Literature

Introduction

In this course design, a special metal cutting tool was designed, such as a prismatic shaped cutter, a shaped drawing, and a worm tooth cutter.

Shaped cutter.

Shaped cutters are used to process parts with shaped profile. Compared to conventional cutters, they provide:

high productivity due to simultaneous processing of all sections of the shaped profile of the part;

high durability due to the large number of permissible crossings;

shape identity, accuracy of part dimensions, which depends mainly on precision of cutting;

fewer marriages;

large savings in machine time;

fewer marriages;

simple sharpening.

Due to the high cost, shaped cutters are used in large-scale and mass production.

They are used on lathe and turret machines, automatic machines and semi-automatic machines. Cutters are designed to handle a particular part.

In shape, these incisors are:

rod;

prismatic

round.

Circular shaped cutters are used for treatment of both external and internal shaped surfaces. They are more technological than prismatic, since they are bodies of revolution, and allow a larger number of overspots and are stuck to a residual value according to the condition of strength.

Hauling.

The drawing is a multi-toothed metal cutting tool that performs the process of cutting metal layers in the absence of feed motion by increasing the width or height of the subsequent tooth with respect to the width or height of the previous one.

Trails have been widely used mainly in mass and large-scale production for a number of reasons:

the presence of only one main movement, the supply movement compensates for the lifting of the tooth;

small thickness and large width of the cut layer;

cutting one of the most productive cutting tools

during cutting, chips cannot be removed from the recess between the pulling teeth and must be fully located in the recess;

simultaneous participation in the cutting process of a large number of teeth;

combination of rough, finishing and finishing treatments;

allowance during stretching is limited to long stretching;

Hauling is a specialized tool, their profitability is ensured only in large-scale and mass production. Therefore, pulling is an economical tool, since the cost per part is small.

Worm cutter.

Worm mills are used for rough and finishing cylindrical gear wheels of external engagement with a straight, screw and chevron tooth, splined shafts, worm wheels and internal engagement wheels.

Worm cutters are referred to a group of wrapping multi-blade tools with structural movement of the rim, since cutting edges of their teeth are located on the screw surface. Compared to the shank and comb, the worm cutter has a significantly higher performance, since the cutting process occurs continuously. Similar to a shank and comb, one worm cutter can process wheels with any number of teeth of this module.

The main drawback of the worm cutter is the fairly high roughness of the machined surfaces, since the required profile is formed by a limited number of teeth. In a worm cutter, unlike a dolly, it is impossible to regulate the number of double moves, and therefore the quality of processing.

Conclusion

In this course project, we studied the basis of the metal cutting tool design and its elements.

The design of cutting tools is one of the main directions in mechanical engineering. The quality and reliability, the operability of cutting tools used in mechanical engineering largely depend on the quality and accuracy of the obtained parts, the productivity of the processing process. When designing cutting tools, you need knowledge of the theoretical foundations of tool design and calculation, you need to be able to correctly determine the best structural elements of tools for these processing conditions and create their optimal design, taking into account operating conditions, know the main directions of their improvement, ways to improve reliability and efficiency, and imagine possible directions and prospects for the development of the cutting tool.