Use of Laser Scanners in Machine Tools to Implement Freeform Parts Machining and Quality Control

2016 ◽  
pp. 527-536 ◽  
Author(s):  
Marco Silvestri ◽  
Michele Banfi ◽  
Andrea Bettoni ◽  
Matteo Confalonieri ◽  
Andrea Ferrario ◽  
...  
Keyword(s):  
Quality Control ◽  
Machine Tools ◽  
Laser Scanners

scholarly journals A strategy for the quality control of automated machine tools

1992 ◽  
Author(s):  
T V Vorburger ◽  
K W Yee ◽  
B R Scace ◽  
F F Jr Rudder
Keyword(s):  
Quality Control ◽  
Machine Tools

scholarly journals Research on Correlation Analysis between Process Parameters of NC Machining and Quality Data Based on Grey Relational Analysis

2018 ◽  
Vol 175 ◽  
pp. 03053
Author(s):  
Ce Wang ◽  
Guijiang Duan ◽  
Rui Liu ◽  
Xiong Han
Keyword(s):  
Quality Control ◽  
Correlation Analysis ◽  
Process Parameters ◽  
Machine Tools ◽  
Quality Data ◽  
Cnc Machine Tools ◽  
Cnc Machine ◽  
Analysis Theory ◽  
Grey Correlation Analysis ◽  
Grey Relational

With the wide use of CNC machine tools, data resources are gradually enriched. How to use the collected data resources for quality control becomes a hot topic for researchers. This paper introduces the use of grey correlation analysis theory to establish the relationship between the process parameters of CNC machine tools and quality data, and then provides a theoretical basis for the quality control using the process parameters of CNC machine tools.

scholarly journals HoloPort – design and integration of a digital holographic 3-D sensor in machine tools

2020 ◽  
Vol 9 (1) ◽  
pp. 33-41
Author(s):  
Tobias Seyler ◽  
Johannes Engler ◽  
Tobias Beckmann ◽  
Markus Fratz ◽  
Alexander Bertz ◽  
...  
Keyword(s):  
Quality Control ◽  
Machine Tool ◽  
Machine Tools ◽  
Graphics Processing Unit ◽  
Processing Unit ◽  
Full Data ◽  
Fully Integrated ◽  
Special Measuring ◽  
Interferometric Sensor ◽  
Graphics Processing

Abstract. Manufacturing of high-precision components requires accuracies that even the most modern processing machines are often unable to deliver reliably. Slightly worn tools, incorrectly calibrated sensors or even different trajectories can lead to results that do not comply with the desired specifications. However, quality control is still mainly performed on randomized samples outside the machine tool in special measuring rooms. Therefore, closed-loop quality control becomes a cumbersome iterative process. With HoloPort, we present a digital holographic sensor system that is capable of measuring the complete topography of machined components with sub-micrometer precision directly inside a tooling machine. To our knowledge, HoloPort is the first wireless interferometric sensor inside a machine tool worldwide. As it is fully integrated, it features not only a multiwavelength interferometer but also a miniaturized graphics processing unit (GPU). This allows for full data evaluation directly in the sensor. A single measurement is taken and processed within 3 s during wireless operation. HoloPort is easy to integrate into a variety of machine tools. This contribution includes detailed information about the sensor architecture. Experimental results on milled parts demonstrate the performance of the system and illustrate possible inline applications as well as future perspectives for the sensor.

Shape Deviation Modeling for Dimensional Quality Control in Additive Manufacturing

2013 ◽  
Author(s):  
Lijuan Xu ◽  
Qiang Huang ◽  
Arman Sabbaghi ◽  
Tirthankar Dasgupta
Keyword(s):  
Quality Control ◽  
Additive Manufacturing ◽  
Phase Change ◽  
Machine Tools ◽  
Influential Factors ◽  
Manufacturing Technology ◽  
Post Processing ◽  
Shape Deviation ◽  
Cost Benefits ◽  
Projection Stereolithography

Dimensional quality control is critical for wider adoption of Additive Manufacturing (AM) as a direct manufacturing technology. Due to the process’ complex physics, AM-fabricated parts still require post-processing with machine tools, which significantly negates its time and cost benefits. In this paper, we investigate product shape deviation for Mask Image Projection Stereolithography (MIP-SLA) — one of the earliest commercialized AM techniques. By studying part fabrication mechanisms, we consider (i) over or under exposure, (ii) light blurring and (iii) phase change induced shrinkage or expansion as the most significant sources for shape deviations. Accordingly, the shape deviation modeling is established to quantify the effects of those influential factors and to understand the deviation mechanisms. Cylinders and cubes of various sizes were built to test our approach. Accurate prediction of shape deviation for all parts serves as a further confirmation of our model.

Upgrade of the Function Quality of the Machine Tools by the Oscillations Compensation

2014 ◽  
Vol 718 ◽  
pp. 116-121
Author(s):  
Darina Matiskova ◽  
Milan Balara
Keyword(s):  
Quality Control ◽  
Control System ◽  
Machine Tools ◽  
Output Shaft ◽  
Quality Control System ◽  
Harmonic Drive ◽  
Quality Of Control ◽  
Oscillatory Nature ◽  
Rejection Filter

The paper deals with the improvement of quality control system harmonic drive with servo applying the method of compensation torque oscillations. The method consists of applying the rejection block. Post documents the oscillatory nature of the system servo-harmonic transmission. Described the reduction block connected to this system suppresses the oscillation of torque, speed and position of the harmonic drive output shaft thereby improving the quality of the regulatory process.The papers solves the problem of torque oscillations of the system which consist of servomotor and harmonic drive. Described rejection filter connected to the input of the system damps oscillations and increases the quality of control.

The Chatterbox: A Device for Hearing Chatter as Sections are Cut

1973 ◽  
Vol 31 ◽  
pp. 360-361
Author(s):  
C. W. McCutchen ◽  
Lois W. Tice
Keyword(s):  
Machine Tools ◽  
Cutting Tool ◽  
Guerilla Warfare ◽  
History Of ◽  
Chatter Marks

Ultramicrotomists live in a state of guerilla warfare with chatter. This situation is likely to be permanent. We can infer this from the history of machine tools. If set the wrong way for the particular combination of cutting tool and material, most if not all machine tools will chatter.In more than 100 years since machine tools became common, no one has evolved a practical recipe that guarantees avoiding chatter. Rather than follow some single very conservative rule to avoid chatter in all cases, machinists detect it when it happens, and change conditions until it stops. This is possible because they have no trouble telling when their cutting tool is chattering. They can see chatter marks, and they can also hear a sometimes deafening noise.

Health communication ethics and CDC quality-control guidelines for information

2003 ◽  
Vol 118 (3) ◽  
pp. 193-196 ◽  
Author(s):  
Jeffrey W McKenna ◽  
Terry F Pechacek ◽  
Donna F Stroup
Keyword(s):  
Quality Control ◽  
Health Communication ◽  
Communication Ethics

Quality control and the medical record

1971 ◽  
Vol 127 (1) ◽  
pp. 101-105 ◽  
Author(s):  
L. L. Weed
Keyword(s):  
Quality Control ◽  
Medical Record
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