kinematic structures of grinding machines
- صفحه اصلی
- kinematic structures of grinding machines
Over the last century, substantial advances have been made, based on improved understanding of the requirements of grinding processes, machines, control systems, materials, abrasives, wheel preparation, coolants, lubricants, and coolant delivery. This paper reviews a selection of areas in which the application of scientific principles …
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In the past, kinematic deviations caused by surface structure or undulations have often led to the pairing of two gears with different hard finishing methods such as honing and grinding. In order to change the repetitive microstructure, honing was added in the past as a secondary manufacturing process in some noise-sensitive applications.
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Aiming at the robotization of the grinding process in the steel bar finishing process, the steel bar grinding robot can achieve the goal of fast, efficient, and accurate online grinding operation, a multi-layer forward propagating deep neural network (DNN) method is proposed to efficiently predict the kinematic solution of grinding robot. The …
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Development of a Superabrasive Grinding Wheel With Defined Grain Structure Using Kinematic Simulation. Annals of the CIRP, 52 (1) ... Proc. 3rd Int. Machine Tool Design and Research Conference, Birmingham (1962), pp. 129-154. Google Scholar [77] ... A Numerical Method to Describe the Kinematics of Grinding.
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The rigidity and natural frequency of machine tools considerably influence cutting and generate great forces when the tool is in contact with the workpiece. The poor static rigidity of these Vertical Machining Centre machines can cause deformations and destroy the workpiece. If the natural frequency of the machines is low or close to the …
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Abstract. Grinding is applied widely in manufacturing of high-precision component. And, pursuing the forming mechanism, together with predicting topography …
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The aim is an exact modelling of the grinding processes, the surrounding machine structures, and the interaction effects. In Sects. 2 and 3, several methods to model both, the grinding process, and the machine structure are presented. In order to simulate interaction effects, process and machine models have to be coupled.
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The grinding process is one of the most important and widely used machining processes to achieve the desired surface quality and dimensional accuracy. Due to the stochastic nature of the grinding process and process conditions, the instantaneous micro-mechanisms between each grain and the workpiece are momentarily changing …
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Grinding Process Size Effect and Kinematics Numerical Analysis. The present work developed numerical codes that simulate steady-state grinding process …
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Abstract. This article presents an overview of current simulation methods describing the interaction of grinding process and grinding machine structure, e.g., …
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From the theoretical point of view, the chapter focuses on the unification of views on the living (constantly changing) structure of the construction of flexible production systems, including its cooperating devices. It contains currently defined and designated technical terms in the field of flexible production systems. From the theoretical point of …
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A five-axis belt grinding machine with integrated functions of measuring and machining was developed, which was mainly composed of gantry structure, belt grinding equipment, measuring devices ...
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A further level of classification for grinding machines with rotating tools distinguishes between cylindrical-planar, generative-gear, coordinate and tool-grinding …
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Continuous generating grinding has become an important gear processing method owing to its high efficiency and precision. In this study, an adaptive design model is proposed for the continuous generation of beveloid gears in common gear grinding machines. Based on this model, a method for determining the installation position and …
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In Fig. 2, a schematic view explains the assumptions and kinematics of the grinding strategy proposed in this work to machine surface microstructures.Figure 2a illustrates the wheel-workpiece interaction and the process kinematics to produce surface microstructures. It shows a structured grinding wheel rotates at a grinding velocity (v g) …
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Introduction to Manufacturing and Machining. Basic working principle, configuration, specification and classification of machine tools. Mechanics of Machining (Metal Cutting) Machinability. General Purpose Machine Tools. Abrasive Processes (Grinding) Superfinishing processes. Screw threads and Gear Manufacturing Methods.
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In grinding, the workpiece, the grinding wheel, and the machine structure all deflect as contact is established. The real depth of cut, a e, is therefore smaller than the calculated depth of cut based on the feedrate. As in surface grinding, real depth of cut is affected by deflections, wheel wear, and thermal deflections.
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A possible solution for grinding hard-to-machine materials, including nickel-based high-temperature alloys, is ultrasonic vibration-assisted grinding (UVG). In this paper, based on the kinematics analysis of elliptical ultrasonic vibration assisted grinding (EUVG), the grinding morphology simulation models under different processes are ...
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As shown in Fig. 1, a workcell with dual PKMs facing each other has been designed for collaborative machining of a rib-like thin-walled part with symmetrical double-sided features.Two Xmini Exechon PKMs proposed by Neumann (2016), named as PKM1 and PKM2, are located face to face.The fixture base is placed between two PKMs. The …
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Context 1. ... on the kinematic simulation presented in [17] [18] [19] a kinematic model with implemented wear model is developed for resin bonded grinding wheels. The general scheme of the...
به خواندن ادامه دهیدConcerning the study of tooth profile modification, Shih et al. [8,9,10] represented the motion of each axis of a five-axis gear grinding machine as a fourth-order polynomial function, and they established the sensitivity matrix of the polynomial coefficients.By adjusting the polynomial coefficients, the machined tooth flank could …
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In the micro-structure grinding process the grinding wheel is only free to move in the X-direction of the machine coordinates to ensure the micro-structure profile, as shown in Fig. 1. At the same time the rotation axis of the grinding wheel in a conventional grinding process is vertical to the Z-direction of the machine coordinates.
به خواندن ادامه دهیدkinematic modulation in abrasive machining. This process can positively influence the surface parameters and the surface structure [8]. The main objective of this research …
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To improve the positioning accuracy of industrial robots and avoid using the coordinates of the end effector, a novel kinematic calibration method based on the distance information is proposed. The kinematic model of an industrial robot is established. The relationship between the moving distance of the end effector and the kinematic …
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The kinematic structure of 6-axis grinding machines for spiral bevel gears is similar to traditional multi-axis machine tools for metal cutting. Therefore, it is reasonable to compensate the 6-axis grinding machine using the modeling and compensation algorithm of traditional five-axis machine tools.
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Researchers often deal with the synthesis of the kinematic structure of a robotic manipulator to determine the optimal manipulator for a given task. This approach can lower the cost of the manipulator and …
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To reach a sufficient accuracy with high productivity in centerless through-feed grinding, is a properly setup condition indispensable. In this work, a 3D kinematic simulation of centerless ...
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Donder, A., Latifinavid, M., Konukseven E.I.: Grinding operation of a workpiece with an unknown shape considering tool deflection compensation. 18th Inter-national Conference on Machine Design and Production UMTIK (2018) Lee, K.M., Shah, D.K.: Kinematic analysis of a three-degrees-of-freedom in-parallel actuated manipulator.
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Since joint interfaces are the main origin of gravity deformation in a machine tool, an elastic beam deformation model is introduced to represent the joint interface, and then the former kinematic model is modified by analytical expressions of the gravity deformation for each joint interface.
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Innovations have also been studied, where a new type of Delta robot kinematic structure with only two degrees of freedom is proposed. The developed architecture enhances the classic 3-DOF kinematic structure, which allows combinations of normal or tangential efforts at the joints or torque acting on the knee; experiments from …
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known linear delta structure is that inst ead of a mobile p latform, a joint com mon to all kinematic chains is used in the structure. T hen delta kinematics began to be used for additive ...
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Because the codes produced with Mastercam X5 in Fig. 4 were appropriate for machine types of the Cartesian structure, these codes were transformed into the motion space of the parallel delta parallel machine that had a parallel structure. The inverse kinematic equations were employed. The interface was developed in Visual Studio 2015 (Fig. 5 ...
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Fig. 4.2.2 Pillar Drilling machine Column drilling machine These box shaped column type drilling machines as shown in Fig. 4.2.3 are much more strong, rigid and powerful than the pillar drills. In column drills the feed gear box enables automatic and power feed of the rotating drill at different feed rates as desired.
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