角形轴承座的工艺和铣上端面-外端面夹具设计【角形轴承箱】【三维SW】

0三维图(1)

Contents
Abstract 3
Chapter 1 Preface 4
Chapter 2 Process analysis of workpiece 4
2.1 Function of workpiece 4
2.2 Process analysis of parts 5
Chapter 3 Blank part determination 6
Chapter 4 Manufacturing process planning 7
4.1 Selection of positioning reference 7
4.2 Making process route 7
Chapter 5 Cutting parameters and labor-hour 10
5.1 Determination cutting parameters and Time quota calculation 10
Chapter 6 Jig/Fixture design 13
6.1 Design duty 13
6.2 Locating datum 13
6.3 Fixture Degree of freedom analysis 14
Chapter 7 Fixture design and usage of equipment 15
7.1 Fixture design 15
7.1.1 locating and clamping of the workpiece 15
7.1.2 Analysis of location errors 16
7.2 Calculation of cutting force and clamping force 17
7.2.1 Calculation of cutting force 17
7.2.2 Calculation of clamping force 18
7.3 Brief description of fixture design and operation 19
Chapter 8 Conclusion 21
References 22
Thanks 22

Abstract
The design course is a teaching link on the basis of finishing the course Technology of Mechanical Manufacture (including machine tool fixture design)and most of the specialized courses. It is a design of special fixture mainly for the processing technic of parts and some procedure processing of parts. From the process of the parts, it mainly analyses what problems should pay attention in the processing, and what methods and process should be adopted to ensure the accuracy and raise labor productivity. As far as special clamp is concerned, good fixture design can improve product productivity, accuracy, reduce costs and so on, and can also expand the scope of use of machine tools, so that improve the production efficiency and reduce the costs under the premise of ensuring accuracy. This design enables us to apply the basic theory of manufacturing technology, combining with practical knowledge gained from production practice, and analyze and solve process problems independently. Besides, it enables us to master the ability to design a process specification for a moderately complex part (shell) and the knowledge of the basic principles and methods of fixture design. This design is also a practice shot of drawing up jig design plan, completing jig structure design ability, being familiar with and using relevant manuals, charts and other technical data and writing technical documents and other basic skills, which lays a good foundation for future graduate design and future work.
Due to limited capacity, lack of experience, there are many inadequacies in the design, I hope the teacher will be more advice.

Key words: process planning, design, special fixture

Chapter 1 Preface
In recent years, with the rapid development of machinery manufacturing industry, manufacturing technology in processing is also developing continuously, and the application of various machine tools is becoming more and more extensive, and various parts are also increasingly demanding. This design carries on the technological analysis to its fork parts, and formulates the reasonable processing procedure for this part is an effective measure to guarantee the processing quality of the parts.
According to this topic, the basic design contents include:
1. According to the "bearing seat" part drawing, process analysis is carried out, and the technical requirements of each surface of the part are analyzed.
2. According to element formulate the mechanical process.
3. Draw up the fixture assembly drawing of the special process.
4. Write design instructions.
Chapter 2 Process analysis of workpiece
2.1 Function of workpiece
This time, the part is the bearing seat. The bearing seat is usually installed on a machine tool. The corresponding connecting hole of the bearing seat relates to the corresponding connecting screw or the connecting shaft. The central hole and the corresponding bearing on the shaft cooperate with each other. With the rotation of the shaft, it is necessary to ensure that the central hole and the shaft have a certain concentric effect.

2.2 Process analysis of parts
Some surfaces to be machined in this bearing seat parts mainly include the wide grooves on the upper end face and the upper end face, the wide grooves on the right lower end face and the right lower end face, the opposite lower end face of the upper wide groove, the opposite end face of the right wide groove, and the front and rear end face of the φ250. The surface features of the front and back face of the φ250 are thick. The roughness requirement is Ra6.3, and the wide groove 50h11 requirement of the two parts is Ra6.3. In addition, the other specified surface roughness requirements are Ra12.5, and the unspecified surface roughness requirements are all non-processed.
The characteristics of the hole include the large circular hole φ180H7 on the center datum. The surface roughness requirement of the hole is Ra1.6, the surface roughness requirement of the 2-φ25 hole on the upper wide groove and the right lower wide groove is Ra12.5, and the through hole requirement of the 6-φ13 hole on the large end face is Ra12.5.
In the form tolerance requirements, the verticality between the upper end face and the lower right end face is 0.12 mm, center large circle hole φ180 degrees roundness requirement 0.008mm, Large end faceφ250 is the base B. Center large circular hole φ180 is the base C. Two wide grooves have positional 0.4mm requirements relative to the B datum. The front and rear faces have the requirement of perpendicularity 0.1mm relative to the C datum center.

0三维图(2)

三维文件图

轴承座零件图

轴承座铣上面夹具体

轴承座铣上面夹具装配图