Effects of Megasonic Coolant on Cylindrical Grinding Performance

Sakamoto, Haruhisa; Shimizu, Sakayu; Suzuki, Kiyoshi; Uematsu, Taro; Shimotokube, Atsuo

doi:10.4028/www.scientific.net/kem.238-239.189

Cited by 4 publications

(4 citation statements)

References 2 publications

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“…M. Mahdi and L. Zhang [31] used the finite element method (FEM) to simulate stresses caused by mechanical loading, thermal cycling, and phase transitions. H. Sakamoto [32] applied FEM to study the wear and deformation of diamond cutting wheels with different structures by determining the conditions that ensure the minimum temperature during grinding and its uniform distribution. In the works of V. Yadava [33,34] using the FEM, the residual stresses arising during high-speed grinding are determined.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Assessment of the Role of Bond Material during Grinding of Superhard Materials with Diamond Wheels

et al. 2022

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The grinding of superhard materials poses an important challenge to manufacturing industry, due to the increased wear and the high possibility of fracture of both the wheel and workpiece material. Various strategies have been proposed for effective grinding of these materials, but further research is still required, especially in cases in which the hardness of the wheel and the workpiece are almost equal. In this study, the role of the bond of a diamond grinding wheel during the processing of superhard materials, such as synthetic diamond, is investigated using theoretical models and FE simulation. Six different types of bonds are studied and the effect of their properties on the stress distribution of workpiece material is determined. Results indicate that even a slight increase in elastic modulus can affect considerably the stress state of the workpiece, directly affecting the critical embedding value of grains into the bond, something that can alter considerably the efficiency of grinding superhard materials. Thus, grinding wheels with bonds of high elastic modulus should be selected in order to increase grain retention, increase processing efficiency, and reduce specific consumption even at higher cross feeds and wheel speeds.

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Section: Introductionmentioning

confidence: 99%

Theoretical Assessment of the Role of Bond Material during Grinding of Superhard Materials with Diamond Wheels

et al. 2022

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“…It is known that using coolant in a material removal process can improve productivity [1][2][3]. So far, a number of cooling methods have been proposed [3][4][5][6][7][8][9][10][19][20]. For increased cooling effectiveness, active cooling and activated cooling have been proposed and examined [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Test of Focusing and Superposition for Variable Strength Activation of Coolant in Precision Machining

Zhang

Zhou

Gao

2009

AMR

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To allow better machining heat transfer through mist evaporation, a new active cooling method is proposed. It is based on variable strength activation of coolant together with active cooling. A key issue in the proposed method is the use of multiple actuators of high frequency vibration for extra strength increase. This will rely on the idea of focusing and superposition. In this project, experimental tests were conducted to test the idea for the proposed variable strength activation of coolant in precision machining. Experimental test results show that the effects of ejection distance de on the vibration sensor output amplitude Aa and output frequency fa are not significant. The output amplitude Aa has a linear relationship with the number of actuator na. The effects of na on fa is not obvious. Based on the results, the idea of using multiple actuators for focusing and constructive superposition in variable strength activation is confirmed.

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“…Moreover, since vibration acceleration by ultrasonic activation greatly intensifies the spouting strength of the fluid (8) , it is thought to improve the spouting characteristics of the coolant stream. From this viewpoint, the influence of this effect on the coolant supply characteristic to the grinding point should be considered.…”

Section: Effect Of Ultrasonic Activation On Coolant Supply Charactementioning

confidence: 99%

“…We have been developing a technique of ultrasonically activated coolant at MHz-order frequency in order to improve the performance of cylindrical grinding (8) . In this study, the effect of using ultrasonically activated coolant on the improvement of ground surface roughness is examined experimentally, and its mechanism is clarified.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Improvement Effect of Ultrasonically Activated Coolant on Finished Surface Roughness in Cylindrical Grinding

Sakamoto

Kajiwara

Shimizu

et al. 2006

JSME Int. J., Ser. C

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The use of an ultrasonically activated coolant improves the roughness of a ground surface compared with that of an ordinary coolant. By evaluating the change in working surface conditions, it has been clarified that the ultrasonically activated coolant suppresses loading and wheel wear, and maintains a good the working surface condition. The flushing effect of the ultrasonically activated coolant, promoted by giant vibration acceleration, prevents the deposition and welding of chips on the working surface. Since the density of kinetic energy in the coolant stream increases, the activation helps the coolant to overcome the airflow due to wheel rotation and to reach the grinding point efficiently. This promotes the cooling and lubricating effects of coolant, and then protects the cutting edges from crushing, falling off and dulling. On the basis of the results, it can be said that the effects of coolant activation suppress the generation of scratches, and consequently improve the finished surface roughness.

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Effects of Megasonic Coolant on Cylindrical Grinding Performance

Cited by 4 publications

References 2 publications

Theoretical Assessment of the Role of Bond Material during Grinding of Superhard Materials with Diamond Wheels

Theoretical Assessment of the Role of Bond Material during Grinding of Superhard Materials with Diamond Wheels

Test of Focusing and Superposition for Variable Strength Activation of Coolant in Precision Machining

Mechanism of Improvement Effect of Ultrasonically Activated Coolant on Finished Surface Roughness in Cylindrical Grinding

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