scholarly journals Laser assisted machining : process control based on real-time surface temperature measurements

1994 ◽  
Vol 04 (C4) ◽  
pp. C4-65-C4-68
Author(s):  
M. IGNATIEV ◽  
L. OKOROKOV ◽  
I. SMUROV ◽  
V. MARTINO ◽  
G. BERTOLON ◽  
...  
Keyword(s):  
Process Control ◽  
Surface Temperature ◽  
Real Time ◽  
Temperature Measurements ◽  
Machining Process ◽  
Laser Assisted Machining

Modular CNC Design for Intelligent Machining, Part 2: Modular Integration of Sensor Based Milling Process Monitoring and Control Tasks

1996 ◽  
Vol 118 (4) ◽  
pp. 514-521 ◽  
Author(s):  
Y. Altintas¸ ◽  
W. K. Munasinghe
Keyword(s):  
Process Control ◽  
Real Time ◽  
Process Monitoring ◽  
Tool Path ◽  
Position Control ◽  
Milling Process ◽  
Machining Process ◽  
Monitoring And Control ◽  
Process Monitoring And Control ◽  
And Control

Modular integration of sensor based milling process monitoring and control functions to a proposed CNC system architecture is presented. Each sensor based process control algorithm resides in a dedicated processor in the AT bus with a modular software. The CNC system’s motion control module has been designed to accomodate rapid manipulation of feeds, cutting conditions and NC tool path which may be demanded by machining process control modules in real time. Modular integration of adaptive control of cutting forces, tool condition monitoring, chatter detection and suppression tasks are illustrated as examples. The process control and monitoring modules are serviced in the real-time multi-tasking environment within one millisecond time intervals without disturbing the position control system. The paper present constraints and guidelines in designing CNC systems which allow modular integration of user developed real time machining process control and monitoring applications.

Design and Implementation of Virtual NC Real-Time Machining Process Control System

2011 ◽  
Vol 66-68 ◽  
pp. 659-664
Author(s):  
Jie Li ◽  
Rui Feng Guo ◽  
Zhi Xiang Shao ◽  
Shang Bin Wang
Keyword(s):  
Process Control ◽  
Real Time ◽  
Control Method ◽  
Process Control System ◽  
Machining Process ◽  
Nc Code ◽  
Straight Line ◽  
Evaluation Algorithm ◽  
Trajectory Interpolation ◽  
Expression Evaluation

After the virtual NC real-time machining process control technology is studied, we design the NC code interpreter using the pipeline control method of overlapped resources in this paper. In order to improve the availability of interpreter, the design adopts the function pointer array and expression evaluation algorithm. By using two methods, the scalability is enhanced. Also the versatility is improved by using keywords information table to some extent. The system achieves a straight line and arc of the trajectory interpolation by the digital sampling algorithm and makes the efficiency improved by using RCS communication mechanism, windows thread and timing mechanism.

Applications of On-Line XRF and XRD Analysis Techniques to Industrial Process Control

1988 ◽  
Vol 32 ◽  
pp. 49-57
Author(s):  
Mattt Hietala ◽  
Dennis J. Kalnicky
Keyword(s):  
Process Control ◽  
Real Time ◽  
Industrial Process ◽  
Xrd Analysis ◽  
Temperature Measurements ◽  
Flow Measurements ◽  
Analysis Techniques ◽  
On Line ◽  
Industrial Process Control ◽  
Assay Methods

Temperature, pressure, and flow measurements are considered standard for process control purposes. It is vital that they be made on-line in real-time and not manually in the laboratory. Chemical assays should be done as fast and continuous as temperature measurements in order to be useful for process control. Until recently, this has not been the case because the assay methods have been difficult to automate.

scholarly journals Implementation of Real-Time Machining Process Control Based on Fuzzy Logic in a New STEP-NC Compatible System

2016 ◽  
Vol 2016 ◽  
pp. 1-14 ◽  
Author(s):  
Po Hu ◽  
Zhenyu Han ◽  
Yunzhong Fu ◽  
Hongya Fu
Keyword(s):  
Process Control ◽  
Cutting Force ◽  
Real Time ◽  
Data Model ◽  
Machining Process ◽  
Shop Floor ◽  
Specific Direction ◽  
Nc Data ◽  
High Level ◽  
Fuzzy Control Algorithm

Implementing real-time machining process control at shop floor has great significance on raising the efficiency and quality of product manufacturing. A framework and implementation methods of real-time machining process control based on STEP-NC are presented in this paper. Data model compatible with ISO 14649 standard is built to transfer high-level real-time machining process control information between CAPP systems and CNC systems, in which EXPRESS language is used to define new STEP-NC entities. Methods for implementing real-time machining process control at shop floor are studied and realized on an open STEP-NC controller, which is developed using object-oriented, multithread, and shared memory technologies conjunctively. Cutting force at specific direction of machining feature in side mill is chosen to be controlled object, and a fuzzy control algorithm with self-adjusting factor is designed and embedded in the software CNC kernel of STEP-NC controller. Experiments are carried out to verify the proposed framework, STEP-NC data model, and implementation methods for real-time machining process control. The results of experiments prove that real-time machining process control tasks can be interpreted and executed correctly by the STEP-NC controller at shop floor, in which actual cutting force is kept around ideal value, whether axial cutting depth changes suddenly or continuously.

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