Soft abrasive flow ultra-precision machining two-phase flow monitoring method based on discrete phase model

A discrete phase model, ultra-precision machining technology, applied in instrumentation, calculation, electrical and digital data processing, etc., can solve problems such as inability to monitor grinding quality and complex calculation

Active Publication Date: 2010-09-15
ZHEJIANG UNIV OF TECH
View PDF2 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the existing soft abrasive flow ultra-precision machining two-phase flow that cannot monitor the grinding quality in the entire flow field environment and the calculation is complicated, the present invention p

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Soft abrasive flow ultra-precision machining two-phase flow monitoring method based on discrete phase model
  • Soft abrasive flow ultra-precision machining two-phase flow monitoring method based on discrete phase model
  • Soft abrasive flow ultra-precision machining two-phase flow monitoring method based on discrete phase model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] The present invention will be further described below in conjunction with the accompanying drawings.

[0046] refer to Figure 1 to Figure 5, a two-phase flow monitoring method for soft abrasive flow ultra-precision machining based on the discrete phase model, the process is:

[0047] 1) Discrete phase model of two-phase flow for precision machining of soft abrasive flow

[0048] In solid-liquid two-phase flow, the DPM model is used to simplify the simulation of particle phase motion. When the volume fraction of the particle phase is small enough, the interaction between particles is considered to be negligible. This means that the volume fraction of the discrete phase must be a relatively low value, usually less than 10% to 12%. In this case, using the DPM model to calculate the particle orbits in the particle phase can also obtain the simulation of the particle phase movement with general significance, and greatly simplifies the calculation process. The calculatio...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a soft abrasive flow ultra-precision machining two-phase flow monitoring method based on a discrete phase model, comprising the following steps: 1) a two-phase flow discrete phase model facing to the soft abrasive flow ultra-precision machining is established, a soft abrasive flow work runner is a straight channel with a U-shaped cross section which consists of a structured surface to be processed and a constraint model and is meshed by an unstructured hexahedral grid, and the motion curve of discrete phase particles is solved by the differential equation of particle acting forces under an integral Lagrangian coordinate system; and 2) particle pressure is reflected by pressure additionally applied on the wall surface of the runner due to the action of collision among the particles, and the variation condition of the soft abrasive flow line etching rate along the runner direction is obtained by extracting the particle pressure and particle speed. The invention can effectively monitor grinding quality in the whole runner environment and simplify calculation.

Description

technical field [0001] The invention relates to the field of ultra-precision machining, in particular to an abrasive particle flow monitoring method for ultra-precision machining of mold structured surfaces. Background technique [0002] For the ultra-precision machining of structured surfaces such as grooves, grooves, holes, prisms, pyramids, and narrow slits involved in mold manufacturing, traditional grinding methods have great limitations, mainly in the small scale of structured surfaces, The structure is complex, and hard solid tools cannot be processed. Abrasive JetMachining (AJM) is mostly used for processing and grinding of brittle and hard materials. At present, the widely used abrasive flow processing method is through the soft abrasive medium—a kind of viscoelastic body loaded with abrasives. light finishing. The above traditional abrasive flow machining method has simple equipment and low cost, but it is difficult to further improve the machining accuracy beca...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06F17/50
Inventor 计时鸣晓风清谭大鹏
Owner ZHEJIANG UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap