Effect of Cutter Performance on Finished Tooth Form in Gear Shaving

1994 ◽  
Vol 116 (3) ◽  
pp. 701-705 ◽  
Author(s):  
I. Moriwaki ◽  
M. Fujita
Keyword(s):  
Mean Value ◽  
Cutting Performance ◽  
Simulation Program ◽  
Depth Of Cut ◽  
Small Depth ◽  
Computer Simulation Program ◽  
Tooth Form ◽  
Tooth Flank ◽  
Stock Removal ◽  
Cutting Model

A computer program has been developed to simulate a gear shaving process. The present paper describes a new cutting model of a shaving process so as to incorporate the effect of a cutting performance of a shaving cutter into the simulation program. This cutting model is constructed on the assumption that an excess depth of cut over a certain criterion yields a material removal from a tooth flank of work gear. In addition, the criterion has no definite value, but its value shows the normal distribution. The mean value of the distribution can define a characteristic of cutting performance of the shaving cutter. A small mean value means that even small depth of cut can cause a stock removal. In other words, the cutter has a good cutting performance. After reliability being confirmed, computer simulations reveal an effect of the cutter performance on shaved tooth form. As a result, a pressure angle error on the shaved tooth profile becomes remarkable as the cutter performance becomes worse. Therefore, the developed computer simulation program is useful for the design of the shaving cutter and judgment of tool life expiring.

Effect of Cutter Performance on Finished Tooth Form in Gear Shaving

1992 ◽  
Author(s):  
I. Moriwaki ◽  
M. Fujita
Keyword(s):  
Computer Simulation ◽  
Mean Value ◽  
Cutting Performance ◽  
Simulation Program ◽  
Tooth Surface ◽  
Depth Of Cut ◽  
Small Depth ◽  
Computer Simulation Program ◽  
Tooth Form ◽  
Cutting Model

Abstract The authors have been developed a computer simulation program of gear shaving. In the present paper, a new cutting model of shaving process is proposed so as to incorporate an effect of a cutting performance of shaving cutter into the simulation program. In this cutting model, it is assumed that a tooth flank material of work gear can be removed only when a depth of cut of a cutting edge exceeds a certain criterion. It is also assumed that the criterion have no definite value but has the nominal distribution over the tooth surface. The mean value of the distribution can define a characteristic of cutting performance of shaving cutter. The small mean value means that even small depth of cut can cause a stock removal; i.e. a good cutter performance. The computer simulations on gear shaving are performed to reveal the effect of the cutter performance on shaved tooth form. Under the conditions used in these simulations, the pressure angle error on the shaved tooth profile becomes remarkable as the cutter performance becomes worse. Thus, the developed computer simulation program of gear shaving has a reliability on the prediction of shaved tooth form. It will be useful for design of shaving cutter, judgement of tool life, and so on.

Effect of Preshaved Form and Cutter Performance in Plunge Cut Shaving

2007 ◽  
Author(s):  
Shimpei Nakada ◽  
Ichiro Moriwaki
Keyword(s):  
New Method ◽  
Simulation Program ◽  
Depth Of Cut ◽  
Tooth Form ◽  
Stock Removal ◽  
Slide Velocity

The present paper describes a new method of simulation program for plunge cut gear shaving. The developed program estimates the shaved form as follows. First is generation of tooth flanks of the work gear and the shaving cutter from gear data. Second is estimation of initial mismatches between tooth flanks of the work gear and the shaving cutter as depth of cut. Third is calculation of stock removal of work tooth flanks from the depth of cut. The program can simulate in consideration of an effect of preshaved form and the cutter tooth form modification. In addition, the program can simulate in consideration of an effect of cutter performance. The cutter performance has been evaluated from slide velocity between the tooth flanks of the work gear and the shaving cutter. The effect of accuracy of preshaved form and cutter performance on the shaved form was investigated using the developed program. As a result, requirement of accuracy of preshaved form and cutter performance are proposed.

Chip Formation and Cutting Performance Investigation on Titanium Alloy Machining

2011 ◽  
Vol 264-265 ◽  
pp. 1062-1072
Author(s):  
Shen Yung Lin ◽  
Y.Y. Cheng ◽  
C.T. Chung
Keyword(s):  
Titanium Alloy ◽  
Cutting Force ◽  
Chip Formation ◽  
Orthogonal Cutting ◽  
Cutting Speed ◽  
Cutting Performance ◽  
Depth Of Cut ◽  
Cutting Condition ◽  
Chip Type ◽  
Cutting Model

First, a 2D orthogonal cutting model for titanium alloy is constructed by finite element method in this study. The cutting tool is incrementally advanced forward from an incipient stage of tool-workpiece engagement to a steady state of chip formation. Cockroft and Latham fracture criterion [1] is adopted as a chip separation criterion. By changing the settings of cutting variables such as cutting speed, depth of cut and tool rake angle to investigate the chip formation process and the variation of cutting performance during titanium cutting simulation. The changes of chip type, cutting force, effective stress/strain and cutting temperature with different cutting condition combinations are thus analyzed. The result demonstrates that the serrated chip type is obviously produced when cutting titanium alloy. Next, water-based and oil-based cutting fluids are employed in conjunction with proper cutting parameter arrangements to perform up-milling experiments. By measuring the cutting force, surface roughness and tool wear to investigate the effect of these combinations of milling variables on the variation of cutting performance for Ti-6Al-4V. The chip shape and cutting force obtained from the experiment are compared with those calculated from simulation. It is shown that there is a good agreement between simulation and experimental results.

Grinding Process Size Effect and Kinematics Numerical Analysis

1999 ◽  
Vol 122 (1) ◽  
pp. 59-69 ◽  
Author(s):  
William L. Cooper ◽  
Adrienne S. Lavine
Keyword(s):  
Steady State ◽  
Removal Rate ◽  
Empirical Relationship ◽  
Three Dimensional ◽  
Depth Of Cut ◽  
Grinding Process ◽  
Zone Length ◽  
Abrasive Grains ◽  
Three Dimensional Modeling ◽  
Stock Removal

The present work developed numerical codes that simulate steady-state grinding process kinematics. The three-dimensional modeling procedure entails the following: specifying the sizes, shapes, and positions of individual abrasive grains on the wheel surface; geometrically calculating the abrasive grains’ depth of cut distributions along the grinding zone as they pass through the grinding zone (neglecting wheel, abrasive grain, and workpiece deflections); using an empirical relationship to relate the abrasive grains’ geometric depths of cut to the grains’ actual depths of cut; and updating the workpiece surface to account for material removal. The resulting data include the abrasive grains’ average depth of cut distribution along the grinding zone, stock removal depth, stock removal rate, grinding zone shape, grinding zone length, percentage of grains impacting the workpiece, grain-workpiece impact frequency, etc. The calculated grinding zone lengths compare favorably with experimental data. This article examines a number of steady-state grinding processes. [S1087-1357(00)00101-5]

Modeling of multi-electrolyte transport in charged ceramic and organic nanofilters using the computer simulation program NanoFlux

Desalination ◽  
2002 ◽  
Vol 147 (1-3) ◽  
pp. 231-236 ◽  
Author(s):  
J. Palmeri ◽  
J. Sandeaux ◽  
R. Sandeaux ◽  
X. Lefebvre ◽  
P. David ◽  
...  
Keyword(s):  
Computer Simulation ◽  
Electrolyte Transport ◽  
Simulation Program ◽  
Computer Simulation Program

A Computational Model for Performance Prediction of a Hybrid PV/T Module

2014 ◽  
Author(s):  
Francisco E. Zevallos ◽  
Cheng-Xian Lin ◽  
Robel Kiflemariam
Keyword(s):  
Computational Simulation ◽  
Thermal Design ◽  
Simulation Program ◽  
Back Surface ◽  
Solar Photovoltaic ◽  
Analytical Expression ◽  
Pv Module ◽  
Computer Simulation Program ◽  
Water Collector ◽  
Instantaneous Energy

In this paper we investigate the performance of an integrated solar photovoltaic and thermal (PV/T) liquid (water) collector using a computational simulation program. A detailed time-dependent thermal model was formulated to calculate and correlate the thermal parameters in a standard PV/T collector, including solar cell temperature, back surface temperature, and outlet water temperature. Based on the energy balance of each component of the system, an analytical expression for the temperature of the PV module and the water was derived. In addition, an analytical expression for the instantaneous energy efficiency of the PV/T collector was also derived in terms of thermal, design and climatic parameters. Built on previously published model, a new computer simulation program was developed and validated. The thermal simulation results obtained are more precise than those previously reported in the literature.

scholarly journals The cutting behavior of cortical bone in different bone osten cutting angles and depths of cut

2021 ◽  
Author(s):  
Yuanqiang Luo ◽  
Yinghui Ren ◽  
Yang Shu ◽  
Cong Mao ◽  
Zhixiong Zhou ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Cutting Force ◽  
Cortical Bone ◽  
Depth Of Cut ◽  
Cutting Angle ◽  
Small Depth ◽  
Proposed Model ◽  
Cutting Processes ◽  
The Impact ◽  
Cutting Path

Abstract Cortical bones are semi-brittle and anisotropic, this brings the challenge to suppress vibration and avoid undesired fracture in precise cutting processes in surgeries. In this paper, we proposed a novel analytical model to represent cutting processes of cortical bones, and we used to evaluate cutting forces and fracture toughness, and investigate the formations of chips and cracks under varying bone osteon cutting angles and depths. To validate the proposed model, the experiments are conducted on orthogonal cuttings over cortical bones to investigate the impact of bone osteon cutting angle and depth on cutting force, crack initialization and growth, and fracture toughness of cortical bone microstructure. The experimental results highly agreed with the prediction by the proposed model in sense that (1) curly, serrated, grainy and powdery chips were formed when the cutting angle was set as 0°, 60°, 90°, and 120°, respectively. (2) Bone materials were removed dominantly by shearing at a small depth of cut from 10 to 50 µm, and by a mixture of pealing, shearing, and bending at a large depth of cut over 100 µm at different cutting orientations. Moreover, it was found that a cutting path along the direction of crack initialization and propagation benefited to suppress the fluctuation of cutting force thus reduce the vibration. The presented model has theoretical and practical significance in optimizing cutting tools and operational parameters in surgeries.

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