Design of machine tool for fastening of bushing-type part

Contents

Summary

Job for coursework

General requirements

Introduction

Detailed description of operation of the accessory

Classification characteristic of the accessory

description of functions of units and parts in the accessory

Theoretical basing scheme, its implementation in the design of the device. Calculation of the installation error and its comparison with the tolerance for the performed size

Calculation of accessory elements

Calculation of structural parameters of fixture of clamping parts

Calculation of strength and rigidity of accessory elements

Conclusion

Application

application

Fixture Recommendations

List of literature

Summary

In this work, a machine tool is designed to secure a bushing (sleeve) type part during fleece milling. Calculation of required force of blank fixation W and moment M on handle, as well as length of handle and screw diameter is performed in operation.

Introduction

In course work, the machine tool for milling the flatland is designed on a horizontal-standby machine. Bald milling is an urgent task in the design of process tooling.

Detailed description of operation of the accessory

This device is a special machine tool of the type of multi-seat machine grip. This fixture is clamping and is intended for clamping of shaft-type part as well as bushing-type part.

In the accessory it is possible to attach 2 parts, the ends of which rest on the installation 4. Clamping of the part is carried out using prism 8 and two grips 18 equipped with sponges 7. The device is provided with a manual clamp which is provided by means of a screw 15 and a handle in the form of a pin 22. By turning the handle, the clamping force of the part in the tool can be adjusted.

The device is also equipped with a spring, which, if necessary, expands the grips and makes it possible to remove parts (processed) from the device.

Classification characteristics of devices

Balm milling device is a special device designed for processing parts of the type "shaft" or "bushing" with an external smooth cylindrical surface.

This tool is used in milling group machines. As a power mechanism, a manual clamp is used.

Description of functions of units and parts in the accessory

The fleece milling device uses a prism for centering the part, and clamps are used for clamping, which are connected to the body and the screw using wedges. The screw is transmitted through the grips, the clamping force applied to the handle. Through the hole in the housing and screws of the accessory are attached to the working table. Spring fitted on power screw provides easy removal of parts from accessory

Conclusion

During the course work, a power calculation of the bald milling device was made. It was established that the fastening force on the ticks is w = 12335 (H), and the torque value of the screw is Mrukh = 68.7 (H * m), the screw diameter db = 0.024 m and the handle length l = 68 cm are also calculated.

Also, research work was carried out in the course work, where the influence of milling modes and cutting characteristics on the structural parameters of the machine tool was established (see Appendix 2).