Error analyzing and control of complex surfaces in multiaxis NC machining

2006 ◽  
Author(s):  
Chen Huixian ◽  
Yao Yunping
Keyword(s):  
Nc Machining ◽  
Complex Surfaces ◽  
And Control

Self-Adapting Intelligent Measurement and Control Processing System Based on 3D Scanning Technology

2012 ◽  
Vol 628 ◽  
pp. 260-264 ◽  
Author(s):  
Xi Qin Wen ◽  
Kun Ren ◽  
Xi Jie Ding
Keyword(s):  
Quality Control ◽  
Engineering Application ◽  
Processing System ◽  
3D Scanning ◽  
Nc Machining ◽  
Product Quality Control ◽  
Intelligent Measurement ◽  
Measurement Control ◽  
And Control ◽  
Measurement And Control

The measurement-Control-Processing integration is the important embodiment of intelligent NC machining, and also is a sign of NC machining technology from digital to intelligent development. This paper introduces the structure, the characteristics and the engineering application of adaptive intelligent measurement and control processing system based on the 3D scanning technology. It has shown that the system has the important meaning for the process optimization the product quality control.

Integration of Geometric and Mechanistic Models of NC Machining Into an Open-Architecture Machine Tool Controller

2000 ◽  
Author(s):  
Robert B. Jerard ◽  
Barry K. Fussell ◽  
Mustafa T. Ercan ◽  
Jeffrey G. Hemmett
Keyword(s):  
Machine Tool ◽  
Nc Machining ◽  
Cutting Process ◽  
Open Architecture ◽  
Mechanistic Models ◽  
Machining Processes ◽  
Modeling And Control ◽  
Feedrate Optimization ◽  
Novel Methods ◽  
And Control

Abstract A great deal of research has been done during the last twenty years on the modeling and control of NC machining. Despite the promise of substantial productivity improvements these methods are sparsely used outside their academic birthplaces. We believe that Open-Architecture Controllers (OAC) are the key to unlocking this unfulfilled potential. We describe the implementation of novel methods for feedrate optimization which utilize a commercially available OAC. In this paper an example is given of how substantial improvements in machining processes can be achieved by implementing geometric and mechanistic models of the cutting process on an OAC. These benefits should provide motivation for a more universal adoption of OACs.

Detection of Random Defects on Highly Reflective and Complex Surfaces

2005 ◽  
Vol 295-296 ◽  
pp. 233-238
Author(s):  
Xing Hua Qu ◽  
Y. He ◽  
G.X. Jia ◽  
J.M. Ding ◽  
S.H. Ye
Keyword(s):  
Assembly Language ◽  
Scale Analysis ◽  
Complex Surfaces ◽  
System A ◽  
Control Circuits ◽  
And Control ◽  
Diffused Light ◽  
Image Collection ◽  
Random Defects ◽  
High Reflection

This paper describes a system that detects and categorizes workpieces with random defects on electrodeposits glossy metal surface. The system is developed on the basis of combination CCD photoelectricity inspection technology, image processing and automatic control technology. In the system, a special illumination apparatus with a light source of diffused light is designed. Workpieces with defects are automatically selected through measurement with image enhancement retreatment, gray scale analysis, image binaryzation, feature extraction and image recognition. Hardware comprises sections of optics, image collection, and control circuits. Software is programmed in Visual C++ and assembly language. The system can resolve the difficulty of detecting random defects on surface under the conditions of high reflection and complex surfaces.

Errors Control in NC Machining of Surface

2012 ◽  
Vol 246-247 ◽  
pp. 877-881
Author(s):  
Ren Qi He ◽  
Fang He ◽  
Jian Ming Huang ◽  
Shi Chun Li
Keyword(s):  
Control System ◽  
Nc Machining ◽  
Programming Technique ◽  
Machining Errors ◽  
And Control ◽  
Technique System

The factors which influence the NC machining errors for surface in CAM process were analyzed. The methods were approved and researched on control machining errors by NC codes programming, technique system and control system.

Control of Metal Alloy Oxidation with Electric Fields

1973 ◽  
Vol 31 ◽  
pp. 164-165
Author(s):  
R. R. Dils ◽  
P. S. Follansbee
Keyword(s):  
Electric Fields ◽  
Oxidation Process ◽  
Base Alloy ◽  
Oxide Surface ◽  
Platinum Electrodes ◽  
Insulating Layer ◽  
Iron Base Alloy ◽  
Alloy Oxidation ◽  
Aluminum Oxide Layer ◽  
And Control

Electric fields have been applied across oxides growing on a high temperature alloy and control of the oxidation of the material has been demonstrated. At present, three-fold increases in the oxidation rate have been measured in accelerating fields and the oxidation process has been completely stopped in a retarding field.The experiments have been conducted with an iron-base alloy, Pe 25Cr 5A1 0.1Y, although, in principle, any alloy capable of forming an adherent aluminum oxide layer during oxidation can be used. A specimen is polished and oxidized to produce a thin, uniform insulating layer on one surface. Three platinum electrodes are sputtered on the oxide surface and the specimen is reoxidized.

Evidence for a Blood Ganglion Barrier in the Superior Cervical Ganglion of the Rat

1982 ◽  
Vol 40 ◽  
pp. 204-204
Author(s):  
D. M. DePace
Keyword(s):  
Blood Vessels ◽  
Superior Cervical Ganglion ◽  
Peripheral Nerves ◽  
Time Schedule ◽  
Transmission Electron ◽  
Cervical Ganglion ◽  
The Central Nervous System ◽  
Cervical Ganglia ◽  
Capillary Circulation ◽  
And Control

The majority of blood vessels in the superior cervical ganglion possess a continuous endothelium with tight junctions. These same features have been associated with the blood brain barrier of the central nervous system and peripheral nerves. These vessels may perform a barrier function between the capillary circulation and the superior cervical ganglion. The permeability of the blood vessels in the superior cervical ganglion of the rat was tested by intravenous injection of horseradish peroxidase (HRP). Three experimental groups of four animals each were given intravenous HRP (Sigma Type II) in a dosage of.08 to.15 mg/gm body weight in.5 ml of.85% saline. The animals were sacrificed at five, ten or 15 minutes following administration of the tracer. Superior cervical ganglia were quickly removed and fixed by immersion in 2.5% glutaraldehyde in Sorenson's.1M phosphate buffer, pH 7.4. Three control animals received,5ml of saline without HRP. These were sacrificed on the same time schedule. Tissues from experimental and control animals were reacted for peroxidase activity and then processed for routine transmission electron microscopy.

Effects of renovascular hypertension on rat adrenal zona glomerulosa

1978 ◽  
Vol 36 (2) ◽  
pp. 582-583
Author(s):  
G. Mazzocchi ◽  
P. Rebuffat ◽  
C. Robba ◽  
P. Vassanelli ◽  
G. G. Nussdorfer
Keyword(s):  
Renovascular Hypertension ◽  
Left Kidney ◽  
Renin Angiotensin System ◽  
Plasma Renin ◽  
Zona Glomerulosa ◽  
Ultrastructural Changes ◽  
Albino Rats ◽  
Left Renal Artery ◽  
Angiotensin System ◽  
And Control

It is well known that the rat adrenal zona glomerulosa steroidogenic activity is controlled by the renin-angiotensin system. The ultrastructural changes in the rat zona glomerulosa cells induced by renovascular hypertension were described previously, but as far as we are aware no correlated biochemical and morphometric investigations were performed.Twenty adult male albino rats were divided into 2 experimental groups. One group was subjected to restriction of blood flow to the left kidney by the application of a silver clip about the left renal artery. The other group was sham-operated and served as a control. Renovascular hypertension developed in about 10 days: sistolic blood pressure averaged 165 ± 6. 4 mmHg, whereas it was about 110 ± 3. 8 mmHg in the control animals. The hypertensive and control rats were sacrificed 20 days after the operation. The blood was collected and plasma renin activity was determined by radioimmunological methods. The aldosterone concentration was radioimmunologically assayed both in the plasma and in the homogenate of the left capsular adrenal gland.

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