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measurement system. Keywords CNC abrasive belt-grinding machine · Geometric modeling · Postprocess · Virtual simulation · Hollow blade 1 nI troduction The traditional machining methods of fan blades and large complex surfaces cannot guarantee accuracy and eciency. The blades need to be manually polished after being roughly
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The grinding stage is mainly to achieve the surface accuracy of ultra-precision optics from tens of microns convergence to 1–2 μm [ 4, 5 ]. To achieve 1–2 μm machining accuracy in the grinding stage, the corresponding measurement accuracy needs to reach the sub …
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Lachance et al. [54] developed an automated system to capture digital images of the grinding wheel between grinding cycles, enabling them to measure the flat areas of the abrasive grains of an ...
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In the hope of better controlling the grinding quality, researchers have developed prediction or monitoring methods for wheel wear, often adopting on-machine measurement equipment. Stephane et al. [14] developed a optic system to measure wheel wear flat by the CCD camera, and the wea flat is determined through binary images.
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The precision measurement of grinding wheel topography is of great significance for accurate evaluating grinding performance and improving the workpiece surface finish and grinding efficiency.
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As shown in Fig. 1 a, the test platform is built based on the automatic surface grinder (MY250), which contains a thermal-force measurement system, a micro-lubrication system and a laser module. The thermal-force synchronized measurement system can obtain the dynamic temperature and grinding force during the machining. …
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The system combines the PI/PD control algorithms to enable real-time force control and tracking during the grinding process, resulting in excellent blade surface quality. Sun et al. proposed an accurate relative calibration method to eliminate mounting errors between the grinding system and the workpiece during the grinding process. …
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27. Many hundreds of mirror segments of 1-2 metre size will be needed to realise the next generation ground based extra large telescopes (ELTs). This paper introduces the design of a new ultra precise large optics grinding machine; Big OptiX or simply 'BOXTM'. This machine has been conceived to have unprecedented dynamic loop stiffness enabling ...
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As shown in Fig. 1, the main steps of the grinding wheel topography measurement based on shape from focus can be described as follow: capturing the grinding wheel surface image sequence, calculating the sharpness functions (the focus levels of image points are assessed), fitting the sharpness evaluation curve and …
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The on-machine measurement system can effectively improve the machining efficiency and accuracy of the optics in the grinding stage, but the common …
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The gear form grinding machine tool configured with two rotary axes and three linear axes is a special purpose five-axis machine tool for gear precision machining, and the gear grinding accuracy will determine the service life of the transmission system of the wind power and the vessels, etc. Recently, some scholars have developed early …
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This paper mainly uses the theory of a multi-body system to propose a "double accuracy" theory of manufacturing and measurement. Firstly, the grinding theory with an accuracy …
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The robotic plunge grinding style results in the nonuniform grinding [28] owing to the high-speed rotation of contact wheel in the actual grinding process and the grinding depth of cut is from L ...
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The repositioning accuracy of the profiler is ±0.5 μm and the absolute accuracy is 4 μm. As the measurement coordinate system shown in Figure 14(b), the …
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In this study, a precision grinding technology for planar enveloping hourglass worm tooth surface is proposed, the virtual rotation center principle and key technology are studied, and an accuracy …
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However, the presence of grinding fluid all over the ground part avoids a correct measurement, so accurate grinding temperature measurements using thermography can only be obtained in cases of dry grinding. In spite of this, numerous works using this type of sensor can be found in the literature. ... Also, integration using a …
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The measurement time can be less than 0.5s and the measuring speed is faster than that of the traditional on-machine measurement or offline measurement. Another application of the vision system was to measure the profile of the ground workpiece during the machining process to assess the profile grinding accuracy. 3.
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The resulting wheel scanning system was capable of measuring an entire grinding wheel with micron level accuracy. The system was used to investigate the effects of fine medium and course dressing ...
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In the transform gear train, the meshing coordinate system of cycloid gear and pin gear pair is established as shown in Fig. 2.The coordinate system of (S_{f}) is fixed with the frame, so called a fixed coordinate system, and the coordinate systems of (S_{2}) and (S_{P}) are fixed and rotate with cycloid gear and needle gear, …
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For the utmost in accuracy, WALTER HELICHECK measuring machines from UNITED GRINDING offer micron-level precision and repeatability for scanning grinding wheels, …
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Both the ASME B89 and the ISO 10360 are a series of standards for the accuracy testing and performance verification of various coordinate measuring …
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The on-machine measurement system can effectively improve the machining efficiency and accuracy of the optics in the grinding stage, but the common grinding machine has large geometric errors and ambient temperature errors, which are the key factors restricting the accuracy of on-machine measurement.
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The grinding wheel scanner was designed so that the optical pen from a white-light chromatic sensor can scan an entire wheel as shown in Fig. 1.The pen used for the work reported in this paper had a measurement range of 1200 mm, a spot size of 4 μm, and a theoretical resolution of 0.2 μm.The x-axis for the system is in the direction …
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Find out all of the information about the Balance Systems S.r.l product: grinding machine measuring gauge TGA . Contact a supplier or the parent company directly to get a quote or to find out a price or your closest point of sale. ... (TGA) helps to improve precision and efficiency in manufacturing processes, through an accurate …
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A new vision system was developed for the on-machine measurement of grinding wheel profiles and a calibration method for the vision system was introduced. A methodology for precisely measuring wheel profiles and for quantifying wheel wear was developed. The reliability and measurement accuracy were testified.
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Precision Laser Measuring in a Grinding Machine. Appears in Print as: 'Precision Laser Measurement in the Grind'. This laser measurement technology inside …
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1. Introduction. With the development of modern industry, surfaces with submicrometric form accuracy and nanometric surface roughness are widely used in optics [1, 2], machinery manufacturing, biomedicine [3], and national defence and the military [4].Corresponding ultra-precision machining technologies have also attracted attention …
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The results show that this developed system achieves a repeatable accuracy of ±3μm for the measurement of the grinding wheel contours. Discover the world's research 25+ million members
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The repositioning accuracy of the profiler is ±0.5 μm and the absolute accuracy is 4 μm. As the measurement coordinate system shown in Figure 14(b), the sensor scanned the profile surface of the workpiece with a step of 10 μm in the X direction and a step of 0.1 mm in the Z direction. The surface points within ±0.5 mm of the center …
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In this paper, a new system has been developed to measure wear flat area. This system is mounted on the grinding machine and automates wear flat measurement by using computer control to automatically position the wheel and capture digital images of the wheel between grinding cycles. Image processing software is used to automatically …
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The quality of workpieces is affected by many factors, such as machine tool errors, and their machining accuracy needs to be improved. Therefore, an accuracy prediction method based on the attention convolutional long short-term memory neural network (ACLSTM) is proposed in this paper. According to an analysis of the operational …
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and has high in-process measuring accuracy. ' An in-process size and roundness measuring system based on this sensor has been developed and forms part of a modular adaptive control system for plunge grinding, and is also used for the adaptive control of traverse grinding.
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Abstract. In order to solve the problems about slow speed and low accuracy on the online roughness recognition of the grinding workpiece, an online measurement system for surface roughness was ...
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The on-machine measurement system can effectively improve the machining efficiency and accuracy of the optics in the grinding stage, but the common grinding machine has large geometric errors and ambient temperature errors, which are the key factors restricting the accuracy of on-machine measurement.
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Abstract. The accuracy of the grinding robot's vision measurement system directly affects the machining accuracy. This study proposes a calibration …
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Provide feedback on the blade condition during the grinding process. 2.2. Description of the Measuring Device. The measuring device ( Figure 3) consists of eight contact measuring elements, a housing, and a communication interface ( Figure 4 ). GT2-A32 sensors (Keyence, Osaka, Japan) were used as measuring elements.
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