Mr. Di Li Profile

Di Li

at AVIC Beijing Precision Engineering Institute for Aircraft Industry

SPIE Involvement:

Author

Publications (2)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 18 December 2019 Paper

An aeroengine measurement system based on high-precision turntable

Di Li, Cheng-Hai Hu, Ben-Neng Tan, Wen-Ming Lei, Chun-Chun Tang

Proceedings Volume 11336, 113360S (2019) https://doi.org/10.1117/12.2547928

KEYWORDS: Error analysis, Control systems, Telecommunications, Manufacturing, Computing systems, Servomechanisms

Read Abstract +

The casing is one of the key components in the aeroengine. It is a typical complex thin-walled structure, and has the characteristics of large component size, many structural elements, complex profile, huge measurement workload, thin structure and easy deformation, and high precision. The requirements of measuring efficiency and measurement accuracy are getting higher and higher. At present, the three-coordinate measuring machine (CMM) is widely used to measure aeroengine casing in China's aeroengine manufacturers. Taking some casing as an example, CMM is required to measure 256 items, and the measuring period is more than 1 day. In order to reduce the workload and improve the efficient in measuring aeroengine casing, the research develops a multi-axis measuring system based on a high-precision turntable, which has been improved to meet the performance. At the same time, the error of the multi-axis measurement system is discussed to achieve high precision and high efficiency measurement.

Proceedings Article | 12 December 2018 Paper

Research on manufacturing technology of high-precision aerostatic rotary tables based on LODTM

Di Li, Jian-Guo Fang, Chang-Yu Xu, Pu Dong, Song-Bao Luo

Proceedings Volume 10849, 108491E (2018) https://doi.org/10.1117/12.2505666

KEYWORDS: Manufacturing, Optics manufacturing, Single point diamond turning, Spindles, Mirrors

Read Abstract +

The core of the high-precision aerostatic rotary table is the aerostatic bearing shafting, including radial bearing and axial bearing. The axial bearing is composed of floating plate and thrust bearings. While, the axial bearing is still processed by manual grinding in China, leading to low machining efficiency, high labor costs and difficult consistency of accuracy.

This paper presents a technology about processing high-precision aerostatic rotary table by SPDT (Single Point Diamond Turning) based on LODTM (Large Optics Diamond Turning Machine) to improve the deficiencies leading by manual grinding. The technology uses single crystal diamond cutting tools for ultra-precision machining, and thus can obtain high-precision optical mirror, which can be adopted in the aerostatic rotary table. An experiment for tin bronze samples has been done to demonstrate the availability of the technique, and a pair of high-precision thrust bearings are obtained. The precision of the thrust bearings, detected through precision optical measurement and precision coordinate measuring technology, is better than the designed requirement. The experiment results show that thrust bearings generated by deterministic ultra-precision machining technique based on LODTM will have advantages in figure accuracy and roughness and so on, which can be helpful to improve the precision and low the cost of high-precision aerostatic rotary table. The high-precision thrust bearings are processed by this way, and the high-precision aerostatic rotary table has been assembled.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years