A new through-feed centerless grinding technique using a surface grinder

Xu, Weixing; Wu, Yongbo

doi:10.1016/j.jmatprotec.2011.04.013

Cited by 19 publications

(8 citation statements)

References 22 publications

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“…To obtain elliptic vibrations in a flexible range, the cylindrical body should be supported at the nodal points of its bending vibration modes. In addition, preloads on the free end can balance the cutting force and improve the stiffness of the vibrator during cutting [13,58,59]. Figure 3b illustrates a schematic of a typical EVA cutting system [39,41] where some PZT rings are stacked orthogonally into a metal beam under a preload, and a tool is set at the end of the device.…”

Section: Design Of Uva Cutting Systemsmentioning

confidence: 99%

Ultrasonic vibration-assisted machining: principle, design and application

Zhang

2015

Adv. Manuf.

141

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Ultrasonic vibration-assisted (UVA) machining is a process which makes use of a micro-scale high frequency vibration applied to a cutting tool to improve the material removal effectiveness. Its principle is to make the tool-workpiece interaction a microscopically non-monotonic process to facilitate chip separation and to reduce machining forces. It can also reduce the deformation zone in a workpiece under machining, thereby improving the surface integrity of a component machined. There are several types of UVA machining processes, differentiated by the directions of the vibrations introduced relative to the cutting direction. Applications of UVA machining to a wide range of workpiece materials have shown that the process can considerably improve machining performance. This paper aims to provide a comprehensive discussion and review about some key aspects of UVA machining such as cutting kinematics and dynamics, effect of workpiece materials and wear of cutting tools, involving a wide range of workpiece materials including metal alloys, ceramics, amorphous and composite materials. Some aspects for further investigation are also outlined at the end.

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Section: Design Of Uva Cutting Systemsmentioning

confidence: 99%

Ultrasonic vibration-assisted machining: principle, design and application

Zhang

2015

Adv. Manuf.

141

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“…In any given time t during grinding, as long as  B (t) and  C (t) are known, the instantaneous radius of  A (t) can be calculated using the Eqs. (1) - (17). Following the flowchart in Fig.…”

Section: Grinding Conditions For Model Prediction and Experimentsmentioning

confidence: 99%

“…This technique is based on the concept of the ultrasonic vibration-assisted centreless grinding of cylindrical components [16][17][18][19]. Two kinds of ultrasonic vibrations are applied to the ball, and by adjusting the directions of the vibrations, the ball can be controlled to rotate in two directions to achieve a full spherical surface grinding [14,15].…”

Section: Introductionmentioning

confidence: 99%

“…Once the required stock removal has been attained, the wheel feeding will stop followed by a dwell to allow "spark-out". During grinding, the ball's rotation around z-axis is controlled by the elliptic vibration from ultrasonic shoe, which is a typical centreless grinding operation for high precision roundness forming [16][17][18][19]. With an additional well-controlled rotational motion around x-axis by ultrasonic regulator, the whole surface of the ball can be well ground to generate a spherical shape.…”

Section: Introductionmentioning

confidence: 99%

“…The synthesis of the vibration displacements in the two directions creates an elliptic motion on the end-faces of the metal elastic body[16,17,19]. The rotations of the ball around z-axis and x-axis are controlled through the frictional force between the ball and metal elastic body, respectively.…”

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confidence: 99%

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Sphere forming mechanisms in vibration-assisted ball centreless grinding

Cui

2016

International Journal of Machine Tools and Manufacture

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This paper aims to clarify the sphere forming mechanisms in vibration-assisted ball centreless grinding, a new technique for effectively processing balls using ultrasonic vibrations. Based on a comprehensive analysis of the ball rotation motion, geometrical arrangement and stiffness of the whole grinding system, a reliable mechanics model was successfully developed for predicting the sphere forming process. Relevant experiments conducted showed that the model had captured the mechanics and the major sphere forming mechanisms in ball centreless grinding. It was found that the ball whole surface can be well ground with a high accuracy, while efficiency is much enhanced compared with that in the traditional methods.The ball rotational speed which is controlled by the ultrasonic regulator has a great impact on final sphericity, and the speed controlled by the ultrasonic shoe dominates the whole processing time. To achieve a stable and high precision grinding, the ball needs to rotate rhythmically, and the wheel feed per step and the ball location angle should be controlled in a critical range.

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3D Modeling of Turbine Rotor Journal Machining with Location on a Bearing Bottom Half

Shchurova

2019

Lecture Notes in Mechanical Engineering

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A new through-feed centerless grinding technique using a surface grinder

Cited by 19 publications

References 22 publications

Ultrasonic vibration-assisted machining: principle, design and application

Ultrasonic vibration-assisted machining: principle, design and application

Sphere forming mechanisms in vibration-assisted ball centreless grinding

3D Modeling of Turbine Rotor Journal Machining with Location on a Bearing Bottom Half

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