Horizontal milling machine 6p80

Contents

Introduction

1. Analysis of existing machine designs and selection

prototype machine

2. Justification of machine technical characteristics

3. Kinematic calculation of the main motion drive

4. Power calculation of speed box elements

5. Spindle Assembly Design and Calculation

Conclusion

List of sources used

APPLICATIONS

1. General view of the 6P horizontal milling machine

2. Machine Speed Box Scan Specification

3. Machine spindle assembly specification

with

with

with

with

with

with

with

with

Project Description

Horizontal milling machine.

The course design highlights the main issues that arise in the design of lathe speed boxes.

The course design contains: drawings of A1 format - 1 pc.; drawings of A2 format - 1 pc.; drawings of A3 format - 2 pcs.; drawings of A4 format - 1 pc.; Explanatory note - 38 pages; specifications - 2 pcs.; figures - 8 pcs.; tables - 6 pcs.

MACHINE; SPINDLE ASSEMBLY; SHAFT; AXIS; WHEEL; BEARING; Now boarding; MODULE; BUSHING; BOLT; NUT; KEY; SPEED BOX; COVER.

The course design shows the main technical characteristics of existing similar machines, calculations necessary for design, kinematic calculation of the main motion drive, calculations for the strength of the main parts of the drive are carried out.

Introduction

The metal cutting machine is the basis for building modern technological systems and automated production.

When creating machines, all the achievements of machine and instrument engineering, electrical and electronics, automation and computer science are used.

Finding new solutions to achieve precision, performance, reliability leads to a frequent change in machine models. Therefore, the creators of new technology should use all the achievements of machine science, apply reference materials and standards to ensure the highest technical characteristics of the machine models created.

Spindle Assembly Design and Calculation

The spindle unit is one of the main units of the machine, the structural shape and dimensions of which affect the layout and parameters of other units, in particular, the speed box.

The design shape of the spindle is determined by the type and purpose of the machine, the requirements for its accuracy, the conditions of its operation, the methods of fixing a tool or workpiece in it, the placement of drive elements and the type of supports used.

5.1 Initial data:

1. Maximum speed nmax = 2500 min-1;

2. Transmitted power Nmax = 11.0 kW;

3. Accuracy of rotation and processing (GOST 1770):

- radial run-out of spindle = 10 mcm;

- axial run-out of spindle = 8 mcm;

- non-roundness of processed parts = 8 μm.

4. Stiffness of spindle assembly j ≥ 25 kg/μm.

5.2 Selection of type of supports depending on rotation speed, required rotation accuracy and processing accuracy

Type of supports - rolling bearings;

Radial and axial run-out of spindle Δ = 1 μm;

Roughness of the treated surface Ra = 0.32 μm;

Non-roundness of the treated surface Δr = 1 μm;

High-speed dp parameter = (0 ÷ 1) ∙ 106 mm ∙ mines-1

Conclusion

During the course work, the necessary calculations were made when designing the specified technological metalworking equipment (machine); analyzed the existing designs of similar machines and chose the machine prototype from them; justified the technical characteristics of the machine; kinematic calculation of the main motion drive and calculation of the main parts of the drive; selected the spindle assembly scheme and calculated its main parameters.

According to the design data, the speed box sweep, spindle assembly and detail of several parts were drawn. The general view of the designed machine is taken as the general view of the prototype machine.