Materials | Free Full-Text | Effect of Stirring Pin Rotation Speed …
In this study, 2A14-T4 Al-alloy T-joints were prepared via stationary shoulder friction stir welding (SSFSW) technology where the stirring pin's rotation speed was set as different values. In combination with the numerical simulation results, the macro-forming, microstructure, and mechanical properties of the joints under different welding conditions …
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Analyzing the influence of lifter design and ball mill …
Maximum torque is achieved at a rotational speed between70%and80%forstraight,HP3,andHP4lifters.It reaches its maximum at a rotation …
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Effects of rotational direction and rotation-to-revolution …
The main purpose of this paper is to provide information on the effect of the direction of the rotation of a pot to that of disk revolution and their speed ratio on …
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Effects of flow rate and rotational speed on pressure fluctuations …
Effect of the rotational speed on pressure fluctuations in the pump discharge chamber. Fig. 17 shows the characteristics of the pressure fluctuations measured at point 7 for different rotational speeds at the design flow rate. The largest pressure fluctuations occur at n = 1450 rpm (i.e., the rated speed), with fluctuations at the other …
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Factors influencing the fracture of nickel-titanium rotary instruments
Aim: To evaluate the effect of rotational speed and the angle and radius of curvature of root canals on the fracture of two types of nickel-titanium rotary instruments: K3 and ProTaper. Methodology: A total of 240 root canals of extracted human maxillary and mandibular molars were divided into two groups of 120, according to the angle of the …
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Analysis on the effects of rotational speed of grinding stone …
Gu et al. [17] investigated the effect of rotational speed of grinding wheel on the material removal such as surface roughness, wear volume, and rail hardness. However, the testing machine used in ...
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Effect of Impact Position and Fan Rotational Speed on …
impact on fan blades poses a serious threat to the operational safety of aircraft engines.In this study, a real model of mallard duck was developed using the smooth particle hydrodynamics method based on a CT scan of a mallard duck.The accuracy of the real model was verified by comparing the simulation results of the impact on a ...
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Effect of rotational speed on the performance of unreinforced and glass
This paper discusses the effect of gear rotational speed on the performance of injection molded Nylon 6 and glass fiber reinforced Nylon 6 spur gears. Test gears were run at different rotational speeds and the performance is discussed. Failure mechanisms at different rotational speeds are investigated using optical microscope.
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Effect of rotational speed on unstable characteristics of …
The increase in rotational speed only intensifies the temperature gradient in the exhaust channel. In contrast, the average temperature change at the outlet of the exhaust flow channel is not significant, indicating that the rotational speed has little effect on the temperature rise in the pump. Download : Download high-res image (507KB)
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The Effect of Rotation Speed on the Temperature and …
The Effect of Rotation Speed on the Temperature and Stress Field of Iron-based Friction Pairs. Junjiao Han 1, Keyan Ning 2, Ming Han 2, Nan Zhang 1, ... Tirovic M. and Newconb T. P. 1991 Thermal effects and pressure distributions in brakes[J] Proc Instn Mech Engrs. 205 199-205.
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Effect of tool rotational speed on force generation, …
The effect of tool rotational speed on the tool force exertion during the friction stir welding of AA 5052 plates is shown in Fig. 17. With the increase in rotational speed the longitudinal force was increased. It was due to the larger volume of material in the dynamically recrystallized zone (DRZ) that the pin had to create while advancing.
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An effect of the rotation speed on microstructure and …
The effect of rotation speed on microstructure and mechanical properties of the joint was investigated. The results show that with the rotation speed increasing, material in the thermo-mechanically affected zone (TMAZ) on the retreating side (RS) is extended increasingly to the weld nugget zone (WNZ). The microhardness of the WNZ is …
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effect of rotational speed on ballmills
effect of rotational speed on ballmills - ubytovaniberanek.cz pump were presented to examined the effect of rotational speed variation on the static pressure in the centrifugal pump. Figures (2,34) represent the contours of the static pressure of the blade, hub, and shroud at rotational speed of 1800 rpm the flow indicates low static pressure ...
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Numerical analysis of restitution coefficient, rotational speed …
Hydrodynamic behavior of two dimensional horizontal rotating drum was studied by using finite volume method and granular kinetic theory. In this work, the effects of the different parameters such as rotation speed, restitution coefficient and particle size on the hydrodynamic and especially on the granular temperature of particles were …
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(PDF) Effect of Rotational Speed, and Dwell Time on the …
The maximum tensile shear load was 1779.6 N with joint efficiency of 14.6% obtained at rotational speed of 2,000 rpm and 2 s dwell time, which is 39.5% higher than the value at low rotational ...
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Machines | Free Full-Text | Modeling Impulsive Ball …
Effect of Rotation Speed (N) The rotation speed shows two behaviors of the load profile inside the mill ( Figure 9 ). For a filling rate of 30% and a ball diameter of 50 mm, the drop height increases together …
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Effects of electrode rotational speed on processing
Rotating electrodes can effectively improve the processing performance of micro-electrical discharge machining (micro-EDM), but there is still a lack of systematic research on the specific effects of electrode rotation and rotational speed changes. In this paper, the effects of electrode rotation and rotational speed on the discharge channel, …
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Effect of cutterhead rotational speed on mudstone
Construction projects are adversely affected by the argillization effect when the tunnel boring machine (TBM) excavates in the mudstone stratum. Improper tunneling parameters and complicated geological conditions are two of the many factors that might cause argillization. Among them, the reasonable rotational speed of cutterhead in the …
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Effect of Periodic Changes in Rotation Speed on Torsional
Introduction: This study evaluated the effect of periodic changes in rotation speed on torsional stress and screw-in force using the dedicated alternative rotation technique (ART) motion of the EQ-M endodontic motor. Methods: Two ART modes of the EQ-M motor in two alternative techniques (ART30 and ART50) and continuous rotation (CR) were …
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The effects of rotation on the frequencies and critical speed …
The influence of n on the frequencies of CNTFPMLs cylindrical shell for various rotational speeds is shown in Fig. 3.Although the frequencies of the shell decrease as n increases for Ω = 0 because with growing n, the stiffness of cylinder declines, with increasing the rotational speed, this process doesn't remain stable.As depicted in the …
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Effect of rotation and traverse speeds on the microstructure …
The effects of rotational speed in range of 800–1600 rpm and traverse speed in range of 12–40 mm/min on the mechanical and microstructural properties of 2205 duplex stainless steel were studied. The temperature and strain were crucial to the microstructural evolutions in the stir and thermomechanical affected zones. The major ...
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Effects of rotational direction and rotation-to-revolution …
The rotational direction of a pot in a planetary ball mill and its speed ratio against revolution of a disk were studied in terms of their effects on the specific impact …
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[PDF] The effect of Rotation Speed on Cavitation of Small …
(School of Energy and Power Engineering, Xihua University, Chengdu 610039, China) king-insisths@foxmail, wenwus@163, 1501569407@qq, 57369036 6@qq Abstract:In order to improve the micro-high-speed centrifugal pump cavitation performance, to understand its internal cavitation characteristics. The internal …
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Effects of various rotational speeds of hydrodynamic
Analysing the effect of rotational speed for the device with groves, the authors observed that an increase in rotational speed from 2100 rpm to 3000 resulted in an increase in SCOD, although with an increase in input pressure from 0.2 to 0.5 bar, SCOD increased only in the case of 2100, 2400 rpm, and for a change from 0.5 to 1.0 bar, …
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Effect of Impact Position and Fan Rotational Speed on -Impact
Five impact positions: 1/6, 1/3, 1/2, 2/3, and 5/6 fan blade height, and 15 types of impact orientations were considered. Based on the previous studies [44], the impact force is pronounced at ...
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Effect of Different Rotational Speeds on Graphene …
the machine cover is covered. The rotating speed is set at 160 rpm, and the milling time is 50 h. 4. When the wet ball milling is finished, the powder is dried in a vacuum drying oven and then tested. 5. The rotational speed of the ball mill is adjusted to 200, 240, and 280 rpm, and the above steps repeated for the experiment. 2.3 ...
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Effects of impeller diameter and rotational speed on …
The rotational speed of PAT was varied by changing the discharge using the gate valve provided at the exit of the service pump. To study the effects of rotational speed on performance, the PAT was rotated at different speeds ranging from 900 to 1500 rpm in the step of 100 rpm i.e. 900, 1000, 1100, 1200, 1300, 1400 and 1500 rpm.
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Effects of Rotational Speed on Performance Prediction of …
Rotational speed, n= 1500 rpm recorded the highest efficiency of 69.8% at QBEP among the other rotational speeds. However, at n= 1750 rpm, an efficiency decrease of about 2.3% is observed compared ...
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Grinding in Ball Mills: Modeling and Process Control
The speed of rotation of the mill determines three basic types of operation modes: slow rotation (cascading), fast rotation (cataracting) and very fast rotation (centrifugation). …
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THE EFFECT OF BALL MILL OPERATING PARAMETERS ON …
The present investigation analyzes the effect of ball U mill operating· parameters on the breakage rates of both t· liberated and composite material. The operating parameters …
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