Non-contact measurement of 3D tooth flank form accuracy of bevel gears on 5-axis machining center

2017 ◽  
pp. 1039-1050
Author(s):  
K. Kanto ◽  
T. Yamada ◽  
S. Komatsu ◽  
J. Morishita ◽  
I. Yamaji ◽  
...  
Keyword(s):  
Form Accuracy ◽  
Contact Measurement ◽  
Bevel Gears ◽  
Machining Center ◽  
Tooth Flank

Advanced Design and Manufacture of Face-Hobbed Spiral Bevel Gears

2009 ◽  
Author(s):  
V. Simon
Keyword(s):  
Gear Tooth ◽  
Numerical Control ◽  
Mutual Position ◽  
Spiral Bevel Gears ◽  
Bevel Gears ◽  
Pinion Gear ◽  
Tooth Surfaces ◽  
Spiral Bevel ◽  
Tooth Flank ◽  
Crown Gear

The design and advanced manufacture of face-hobbed spiral bevel gears on computer numerical control (CNC) hypoid generating machines is presented. The concept of face-hobbed bevel gear generation by an imaginary generating crown gear is established. In order to reduce the sensitivity of the gear pair to errors in tooth-surfaces and to the mutual position of the mating members, modifications are introduced into the teeth of both members. The lengthwise crowning of teeth is achieved by applying a slightly bigger lengthwise tooth flank curvature of the crown gear generating the concave side of pinion/gear tooth-surfaces, and/or by using tilt angle of the head-cutter in the manufacture of pinion/gear teeth. The tooth profile modification is introduced by the circular profile of the cutting edge of head-cutter blades. An algorithm is developed for the execution of motions on the CNC hypoid generating machine using the relations on the cradle-type machine. The algorithm is based on the condition that since the tool is a rotary surface and the pinion/gear blank is also related to a rotary surface, it is necessary to ensure the same relative position of the head cutter and the pinion on both machines.

Basic Performance of Natural Fiber Bevel Gears Made From Only Bamboo Fibers Extracted With a Machining Center

2020 ◽  
Author(s):  
Tetsuya Kawabata ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama ◽  
Masao Nakagawa ◽  
Hiromichi Nobe
Keyword(s):  
Natural Fiber ◽  
Pressing Method ◽  
Bevel Gears ◽  
Machining Center ◽  
Module Size ◽  
New Type ◽  
Bamboo Fibers ◽  
Mechanical Elements ◽  
Plastic Gears ◽  
Black Color

Abstract Metal gears can transmit large torque. The disadvantages associated with metal gears are the noise produced and necessity of lubricants. Plastic gears are advantageous because they are lightweight and can be used without lubricants. However, plastic gears have relatively low strengths and damaging environmental effects. We propose the development of a new type of gear that overcomes the disadvantages associated with metal and plastic gears whilst maintaining their advantages. To address environmental issues within manufacturing, it is particularly important to utilize sustainable and reproducible natural materials. Therefore, we devised a method for extracting high-quality and high-precision bamboo fibers using a machining center. Bamboo bevel gears, which are complex-shaped mechanical elements, were manufactured using the hot-pressing method. This paper outlines the performance and characteristics of the molded bamboo bevel gears. We investigated the degree of burning and strength of the bamboo fiber gears at various cutting and forming conditions. The results demonstrated that the degree of burning (black color) did not affect the gear strength, and the gear strength was at a maximum when the fiber length was 50% of the module size.

scholarly journals Angular velocity and contact force simulation of the spiral bevel gear meshing based on the hertz contact theory

2019 ◽  
Vol 39 (2) ◽  
pp. 148-156
Author(s):  
Lizhi Gu ◽  
Tieming Xiang ◽  
Can Zhao ◽  
Shuailiang Guo
Keyword(s):  
Angular Velocity ◽  
Contact Force ◽  
Tangential Component ◽  
Bevel Gear ◽  
Contact Theory ◽  
Spiral Bevel Gear ◽  
Hertz Contact ◽  
Bevel Gears ◽  
Spiral Bevel ◽  
Tooth Flank

To obtain the change tendency of the wheel’s angular velocity and tangential component of contact force with time of the pinion under the step input during spiral bevel gear meshing, the tooth flank equation of spiral bevel gear was constructed based on the Non-Uniform Rational B-splines curve. The three-dimensional model of the pinion and the wheel were built based on the tooth flank equation. The calculation equation and relative parameters set for the contact force of spiral bevel gear meshing were done based on the Hertz contact theory. A mating of spiral bevel gears was taken as an example for dynamics simulation and the simulation results show that the relative error rate of the angular velocity between simulation and theoretical calculation is 0.054%, and that the relative error rate of tangential component of the contact force between simulation and theoretical calculation is 4.82%. These findings provide the theoretical basis for dynamic characteristics optimization of the spiral bevel gears.

Form Accuracy of Internal Grinding of Small and Deep Holes with Coolant Supplied from Inner Side of Grinding Wheel

2014 ◽  
Vol 1017 ◽  
pp. 50-54 ◽  
Author(s):  
Kosaku Matsubara ◽  
Jun Tsuchimura ◽  
Shota Kawazoe ◽  
Hiroyuki Sasahara
Keyword(s):  
Supply System ◽  
Grinding Wheel ◽  
Machined Surface ◽  
Steel Cylinder ◽  
Form Accuracy ◽  
Internal Grinding ◽  
Machining Center ◽  
Grinding Fluid ◽  
Grinding Conditions ◽  
Coolant System

Generally, grinding fluid is supplied from a nozzle to a grinding point. However, it is difficult to supply sufficient coolant to the deep grinding point of a hole. Therefore, we have proposed an alternative coolant system that supplies grinding fluid from the inner side of the grinding wheel utilizing the spindle through the supply system of the machining center. In this study, a new tool for small and deep holes was developed to supply grinding fluid in this way. The inside of a 0.45%C steel cylinder was then machined under various grinding conditions. Higher form accuracy and surface roughness were obtained under all conditions by supplying grinding coolant from the inner side of the grinding wheel. In addition, the system prevented tears on the machined surface and loading on the grinding wheel.

C27 Evaluation of Form Accuracy Considered Redundancy of Control Axes with 5-Axis Controlled Machining Center

2008 ◽  
Vol 2008.7 (0) ◽  
pp. 259-260
Author(s):  
Tsugutoshi KAWAGUCHI ◽  
Toshiki HIROGAKI ◽  
Eiichi AOYAMA ◽  
Keiji OGAWA
Keyword(s):  
Form Accuracy ◽  
Machining Center

Algorithms for Involute and Octoidal Bevel-Gear Generation

2004 ◽  
Author(s):  
Giorgio Figliolini ◽  
Jorge Angeles
Keyword(s):  
Great Circle ◽  
Tooth Profile ◽  
Bevel Gear ◽  
Rolling Motion ◽  
Bevel Gears ◽  
Pure Rolling ◽  
Pitch Curve ◽  
Tooth Flank ◽  
Flank Surface

A suitable formulation and the implementing algorithms for involute and octoidal bevel-gear generation are proposed in this paper. In particular, the exact spherical involute tooth profile of bevel gears and their crown-rack is obtained through the pure-rolling motion of a great circle of the fundamental sphere on the base cone. Moreover, the tooth flank surface of octoidal bevel gears is obtained as the envelope of the tooth flat flank of the octoidal crown-rack during the pure-rolling motion of its flat pitch curve on the pitch cone. The proposed algorithms have been implemented in Matlab; several examples are included to illustrate their applicability.

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