In their pursuit for quality, companies in the production sector are confronted with the trend of ‘first time right on time’, thus requiring flexible production infrastructure for small series production. Regarding inspection tasksflexible metrology and highly flexible machine control structures are necessary. The primary goal of the presented project was the improvement, acceleration, and simplification of a machine vision inspection process of transparent free-form parts, such as automotive headlights. These parts have to be inspected for errors such as scratches, fingerprints, and dust....
Accuracy of roughness parameters measured with Talyrond 365 was examined with comparison to the results received with the Form Talysurf PGI 830. The research has shown that there are several limitations of measurement method and software as well, while measuring with the Talyrond 365. Also, there are significant differences between results acquired with machines under comparison. The reasons for observed dissimilarities were discussed.
The demand on the precision of machine tools is steadily increasing. In this context, the intrinsic accuracy of the machine tools is no longer sufficient. Nowadays volumetric compensation is applied to minimize the errors of the tool center point. This paper presents a new, flexible, high precision coordinate measurement system which also offers a great automation potential. Its principle is based on white-light interferometry. The system measures the distance between an emitter and minimum three reflectors. The position of the emitter with respect to the reflectors is determined via...
Remotely operated underwater vehicles (ROV) equipped with manipulator have been used for underwater operation increasingly. The ROV is usually operated manually with the aid of underwater camera to approach and grasp a target by its manipulator. Due to the low quality of underwater imaging, it is quite difficult for the human operator to determine the accurate distance and orientation between the ROV and the target interested. This paper presents an idea of developing an automatic 3D measurement and guiding system for ROV in an effort to facilitate this process. Based on structure-light...
The time stability of pressure transducers is a necessary condition which provides the measurement and computation of ? flight data by an aircraft computer with required accuracy. As compared with Weston Aerospace up-to-date highstable electromechanical pressure transducers, which use a resonance effect in a vibrating cylinder, semiconductor microelectromechanical sensors (SMEMS) have advantages in possible integration with a signal microprocessor circuit and in group manufacturing based on advanced MEMS technologies. Honeywell is known to be conducting efforts in replacing electromechanical...
It’s requested for many products to make a good aesthetic impression. This feeling cannot be permanent of course, but manufacturer takes care of a scratch-resistance coating, as surface appearance is one big part of this impression. The paper discusses new method for the scratch test, as an answer to the industry need for the technique that is quick, reliable and economically acceptable. Hence, new test stand was designed to improve existing methods for economical aspect especially. Construction of this instrument is described. Discussion of strong points is presented but also a list of...
The analysis of existing in World practice flow rate measurement standards for calibration of the gas flow and volume measuring devices for operating conditions is carried. A new idea of the design the flow rate measurement standard dedicated for calibration meters and flow meters of natural gas is considered. It apply the variable pressure drop method for measuring the flow rate and volume of gas using the diaphragm as the constriction device. Design features of standard and its calibration with use of the standard flow rate measuring bell-type device are given. The numerical modelling of...
In recent years, there has been an increased emphasis for quality control in the manufacturing sector. Many manufacturing processes have become fully automated resulting in high production volumes. However, this is not necessarily the case for inspection of aerospace surface defects. Volume measurement of defects is one of the key elements in quality assurance in order to determine the pass or failure of certain manufactured parts within this industrial sector. Existing human visual analysis of surface defects is qualitative and subject to varying interpretation. Noncontact 3D measurement...
This paper presents a new approach for surface roughness (Ra) prediction during milling by using dynamometer to measure cutting forces signals and cutting conditions. End milling machining process of hardened die steel with carbide end mill, was modeled in this paper using the adaptive neuro fuzzy inference system (ANFIS) to predict the effect of machining variables (spindle speed, feed rate and axial/radial depth of cut) on surface roughness. In this contribution we also discussed the construction of a ANFIS system that seeks to provide a linguistic model for the estimation of surface...
Long-lasting works on the ISO 15530 series can be a proof for complexity of uncertainty evaluation of coordinate measurements for different characteristics defined according to the rules of geometrical product specification (GPS). There are two most acknowledged and commonly accepted methods. First is described in the document ISO 15530-3:2011 which provides in detail the procedure of uncertainty evaluation with the use of calibrated workpiece or measurement standard. Second procedure is based on the use of computer simulation that is known from many imeko_proceedings and mentioned in ISO/TS...