An attempt was made to use a combination of cutting force and cutting temperature along with cutting velocity and feed rate to predict the tool wear during turning of AISI 4340 steel having a hardness of 46 HRc using a multi coated hard metal insert with a sculptured rack face. An ANN model was developed to fuse the cutting force and cutting temperature signals and to predict flank wear. It was found that the predictions of the ANN model matched well with the experimental results.
Manufactured components are subjected to measurement in order to verify their conformance to specifications. From the measurement data, approximate functions are established to assess errors on geometry of the components. Misalignment in setting of the components for cylindricity and sphericity measurements leads to certain degree of distortion in the measured data. The size-suppression inherent in these form measurements leads to data representing deviations in microns. Therefore, limacon cylinders and limacoids are respectively used as approximating functions for the evaluation of...
This paper proposes a predictive open-loop control approach to maintain effective speed regulation during end-milling operation. The process is analyzed analytically using two-degree of freedom model and the time domain and frequency domain data are used to construct a chatter prediction neural network model. Sixty training sets are prepared with and without chatter conditions. A neural network controller is proposed for tracking the overall response within chatter limits. The effectiveness of prediction network and controller is illustrated with an example.
Gears are the most efficient power transmission elements. Power loss in transmission is an important parameter which determines the efficiency of the system. The tooth action from the beginning to the end of contact along the path contact consists of slide/ roll motion, while rolling being predominant at the pitch point, sliding takes its share at the begin and end points. The coefficient of friction is higher during approach compared to the recess; therefore power loss in gearing can be regulated by designing gears to maintain tooth action which will lower the power loss. Altering the...
Every Type approved Line Replaceable Unit (LRU) of a Combat Aircraft undergoes a stringent Quality Assurance plan during production, assembly and acceptance testing (ATP) for obtaining airworthiness certification. The traceability of the materials used for the aircraft components and International Standards imposed for testing are well documented for every aircraft system. Strict geometrical tolerances are imposed during manufacturing processes and the inspection cleared components are assembled with an approved assembly procedure documents. Then the assembled units are subjected to an...
Injection molded polymer based gears are not preferred for precision motion applications due its directional shrinkage behavior. This paper attempts to predict the material shrinkage of unreinforced and carbon fiber reinforced nylon gears and correlate with gear metrological parameters. Fiber alignment along the tooth profile restricts the shrinkage and induces anisotropic shrinkage, which significantly decrease the deviation of involute profile parameter from the design values. Fibers embedded in the molded skin surface increases the gear tooth profile form deviations. Nonalignment of...
Delivering quality products has become the top priority in all industries in order to remain competitive in the market. This paper mainly deals with the design and implementation of a high-speed quality inspection system capable of detecting missing bottles caps and askew caps. Image processing technique is used to identify a defective tray in the packaging area and alert the operator.
Digital speckle pattern interferometry (DSPI) is becoming more and more popular for deformation analysis and testing due to its non-invasive nature. In the present work, out-of-plane static deformation method is used to determine Young’s modulus (E) of cantilever beam made of Aluminium. A fringe pattern corresponding to deflection of cantilever beam due to point load at its free end was recorded. To improve the measurement accuracy from the fringe pattern, a filtering scheme based on combination of median/wiener and maximum filtering is used. This filtering scheme reduces noise, improves...
For safety increasing of Russian railways TDI SIE has developed and produced automatic laser diagnostic system Complex for inspection of geometric parameters of wagon wheel pairs for running train (speed up to 60 km/hr.), which is used successfully on Russian railways. The principle of inspection method, block-diagram for system COMPLEX and results of industrial application are presented.
An optical structured light method and an opto-electronic system for automatic noncontact distant measurements of wear and defects detection for a contact wire electro-supply network are presented. The system industrial prototype can extract the main technological wire parameters, first of all, the remaining height with RMS error down to 0.15 mm and the wire cross-section area with RMS error of 1.5 mm². This information is sufficient for confident decision on operation of contact wire electro-supply network. This method could be applied for automatic wire wear measurement and defects...