Research on Simulation of Rotary Burrs NC Grinding

2008 ◽  
Vol 392-394 ◽  
pp. 487-492
Author(s):  
Guan Wei Zhang ◽  
S.C. Zhang ◽  
Yu Tian Lin
Keyword(s):  
Simulation Analysis ◽  
Tooth Surface ◽  
Grinding Wheel ◽  
Tool Shape ◽  
Tool Trajectory ◽  
Security Region ◽  
Rotational Part ◽  
Grinding Machine ◽  
Nc Grinding

A 3D rotary burrs grinding simulation system is described. By analyzing the structure of rotary burrs 4-axis NC grinding machine tool, rotary burrs grinding motion model is established. The method of axis direction decomposition based on 3D modeling is provided, which includes decomposing rotational part into simple primitive cells by using Visual C++ and OpenGL as the developing tools, and implementing the boolean operation between the part model and a tool sweeping solid dependent on the tool shape and tool trajectory for each tool movement. To use grinding machining simulation analysis of the interference resulted in grinding, main factors range is determined. Security region is identified in order to avoid interference between grinding wheel and the tooth surface, which can be used for guiding production of rotary burrs and improving the quality of grinding.

scholarly journals The Improvement of the Precision of the Archimedean Spiral Toothline Gear Cutting Mill

2021 ◽  
Vol 14 (1) ◽  
pp. 23-29
Author(s):  
Hunor András Gyéresi ◽  
Luciana Cristea ◽  
Márton Máté
Keyword(s):  
Spatial Extent ◽  
Tooth Surface ◽  
Major Influence ◽  
Grinding Wheel ◽  
Secondary Effect ◽  
Profile Error ◽  
Archimedean Spiral ◽  
Theoretical Profile ◽  
Cylindrical Gears

Abstract The precision of gears has a major influence on the quality of the transmission. If the gear cannot be finished by grinding, the precision of the generating tool becomes essential. Archimedean spiral toothline cylindrical gears are obtained by reciprocate meshing using a milling cutter built up by individual cutters, organized in groups. The profiles of edges must be realized with a minimal profile error. In order to ensure the quality and the precision of the meshed tooth surface, and also the profile constancy after re-sharpening, relief faces must be realized by a grinding relieving operation. A secondary effect of the kinematics of relieving end the spatial extent of the grinding wheel a post undercut results and this produces an inevitable profile error. The present paper discusses a possible grinding wheel setting that produces a maximum theoretical profile error under 1μm along the whole re-sharpening reserve of the cutter. The proposed setting can be realized on a classical relieving lathe.

Evaluation of the Working Surface of the Grinding Wheel Using Speckle Image Analysis

2015 ◽  
Author(s):  
Arunachalam Narayanaperumal ◽  
Vijayaraghavan Lakshmanan
Keyword(s):  
Surface Quality ◽  
Surface Condition ◽  
Grinding Wheel ◽  
Optical Parameters ◽  
Wheel Surface ◽  
Wheel Wear ◽  
Speckle Image ◽  
Periodic Monitoring ◽  
Grinding Machine

The surface quality of the ground components mainly depends on the surface condition of the grinding wheel. The surface condition of the grinding wheel changes with grinding time due to wheel wear and loading. The excessive wear and loading increases the cutting force and the temperature. This in turn affects the quality of the produced component. Hence periodic monitoring of the grinding wheel surface is essential to avoid the production of the defective components. In this paper, an attempt is made to study the changes in the grinding wheel surface condition using the laser scattered images. The simple speckle imaging arrangement is fabricated and fitted into the grinding machine to capture the images of the grinding wheel after each 100 passes. The fresh wheel expected to scatter more light due to higher roughness and porosity. On the other hand, the completely glazed and worn-out wheel scatters the light less due to smoother surface. Thus, speckle image intensity distribution captures the changes in the grinding wheel surface condition. The optical parameters evaluated from the speckle images clearly indicating the changes in the grinding wheel condition. This method can be utilized to evaluate the grinding wheel condition to improve the surface quality of the component produced.

Research on Evaluation Method of CNC Gear Form Grinding Processing Performance

2014 ◽  
Vol 635-637 ◽  
pp. 1944-1947
Author(s):  
Hui Liang Wang ◽  
Yu Quan Xiong ◽  
Jian Jun Yang ◽  
Kai Xu
Keyword(s):  
Performance Evaluation ◽  
Evaluation Method ◽  
Integrated Model ◽  
Numerical Control ◽  
Tooth Surface ◽  
Machining Performance ◽  
Research On Evaluation ◽  
Gear Grinding ◽  
Grinding Machine

To analyze the machining performance of grinding machine and improve the quality of tooth surface, this paper proposes an integrated model of processing performance evaluation of computer numerical control gear grinding machine. Based on the gear profile grinding machine kinematics principles, the topology modification formulas of tooth surface were deduced. Calculated the process capability index according to experimental data and found that the tooth surface errors were followed normal distribution. The main reason of formation errors was analyzed by cause and effect diagram. Finally, the validity of this integrated model of processing performance evaluation is numerically demonstrated using CNC gear grinding machine.

The Grinding of the Worm for Worm Gear Set

2018 ◽  
Vol 775 ◽  
pp. 473-479
Author(s):  
Chi Hsiang Chen ◽  
Duy Hoang Nguyen ◽  
Shinn Liang Chang ◽  
Truong Giang Nguyen
Keyword(s):  
Gear Ratio ◽  
Tooth Profile ◽  
Worm Gear ◽  
Tooth Surface ◽  
Grinding Wheel ◽  
Essential Requirement ◽  
Straight Line ◽  
Worm Gears ◽  
Crossed Axes ◽  
Grinding Machine

Worm gear set is composed by the worm and worm wheel. It is an important transmission device for crossed axes transmission with high gear ratio. Worm gears can be produced in several ways, depending on the size of the transmission, the number of threads, the type of the worm and the purpose of application, etc. The contact is highly related to the precision of tooth profile. The best way to control the characteristic of contact is done by the modified worm profile. This paper deals with the manufacture of ZI-Worm whose theoretical tooth surface is generated by a screw motion of a straight line. In order to manufacture the worm with modified high precision tooth profile, the most important consideration is how to develop the profile of the grinding wheel in the worm grinding process. It is the essential requirement for the development of grinding machine for the worm. This article therefore deals with the problems of how to generate the profile of the grinding wheel. By the development of the grinding machine, we can complete the worm surface and tools for the production.

Study on a Principle of Grinding Process of Face Gear

2010 ◽  
Vol 43 ◽  
pp. 262-268
Author(s):  
Xiao Zhen Li ◽  
Zheng Min Qing Li ◽  
Ru Peng Zhu
Keyword(s):  
Space Curve ◽  
Tooth Surface ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Face Gear ◽  
The Face ◽  
Set Up ◽  
Grinding Machine ◽  
Complex Movement

In order to process the hardened face-gear, and improve the surface’s accuracy, the grinding process of face gear is studied. According to the equation of tooth surface, the tooth surface is drawn by a series of space curve, the contact point’s trajectory and velocity at the processing of grinding are determined in three coordinate directions. The model of grinding machine is set up, and analyses the movement of relationship between tool and face-gear. The simple grinding wheel apply complex movement to grinding process the face-gear is successful.

Analysis of the Grinding Characteristics of β-Ga2O3 Crystal on Different Planes

2020 ◽  
Vol 19 (02) ◽  
pp. 235-248
Author(s):  
Hai Zhou ◽  
Jiahui Wei ◽  
Fang Song ◽  
Yongkang Li ◽  
Chuanjin Huang ◽  
...  
Keyword(s):  
Specific Energy ◽  
Grinding Force ◽  
Surface Grinding ◽  
Grinding Wheel ◽  
Experimental Conditions ◽  
Grinding Force Ratio ◽  
Force Ratio ◽  
Grinding Conditions ◽  
Grinding Machine

The (010) and (100) planes of a [Formula: see text]-Ga2O3 crystal were subjected to precision grinding tests with a resin bond diamond grinding wheel on a precision surface grinding machine. The grinding characteristics and surface grinding quality of the planes of the [Formula: see text]-Ga2O3 crystal were analyzed on the basis of grinding force, grinding force ratio, specific energy, and surface morphology. The (010) plane shows a larger grinding force and specific energy but a smaller grinding force ratio compared with the (100) plane. Under experimental conditions, the normal and tangential grinding forces of the (010) plane are 1.4–2.2 and 2.6–7.8 times that of the (100) plane, respectively. The specific energy of the (010) plane is 2.8–6.1 times that of the (100) plane, and the grinding force ratio of the (100) plane is 1.4–3.7 times that of the (010) plane. Under the same grinding conditions, the material removal methods for the two planes are evidently different. The (010) plane is mainly removed by brittle fracture and accompanied by a minimal broken area, whereas the (100) plane is mainly removed by cleavage layering and exhibits numerous block cleavage. The (100) plane is the strong cleavage surface, and the (100) plane demonstrates a higher surface roughness than the (010) plane under the same grinding conditions.

An Investigation of Surface Grinding Characteristics for Titanium Alloy with CBN Wheel

2007 ◽  
Vol 364-366 ◽  
pp. 237-242 ◽  
Author(s):  
Shen Yung Lin ◽  
Y.C. Liu ◽  
C.W. Huang
Keyword(s):  
Titanium Alloy ◽  
Feed Rate ◽  
Surface Grinding ◽  
Depth Of Cut ◽  
Grinding Wheel ◽  
Measuring Instruments ◽  
Grinding Forces ◽  
Grinding Machine ◽  
Work Table

This study performs an experiment to investigate the effect of process variables such as rotational cutting speeds of the wheel, feed rate of the work-table and grinding depth of cut on surface roughness and the fluctuations of grinding forces for Ti-6Al-4V titanium alloy. STP-1623 ADC surface grinding machine, grinding wheel with CBN material sintering and Ti-6Al-4V titanium alloy workpiece are used in the experiment. The roughness of the grinding surface was measured by the roughness measuring instruments and the fluctuations of grinding forces were measured through dynamometer after each surface layer ground from the workpiece in the experiment. The grinding performance can be ascertained from the signal fluctuations phenomena of the grinding forces both along normal and tangential directions, which may also be utilized as an index for the quality of surface finish judgment. The results show that excellent surface quality being always consistent with the stable grinding force fluctuations and can be obtained under the conditions of slow feed rate of the work-table, high revolutions of the wheel and shallow depth of cut.

Principal Curvatures and Cutter Location Calculation of Six-Axis CNC Abrasive Belt Grinding Machine

2010 ◽  
Vol 139-141 ◽  
pp. 1328-1332
Author(s):  
Guang Ling Wu ◽  
Qiu Ju Zhang
Keyword(s):  
Simulation Analysis ◽  
Grinding Wheel ◽  
Machining Accuracy ◽  
Automatic Programming ◽  
Principal Curvatures ◽  
Validity And Reliability ◽  
Belt Grinding ◽  
Modified Method ◽  
Grinding Machine ◽  
Five Axis

A six-axis CNC belt grinding machine automatic programming technology was studied in this paper, and which used D-H rule to solve out five-axis motion variables (the DOF of A, B, X, Y, Z), then discussed the problem of maximum contact degree between the grinding wheel and contact surface, and solved out the C-axis motion variable (the sixth DOF) by the direction of principal curvature in each cutter location point, after that gave a modified method of C-axis motion variable to smooth the machining. In order to ensure the machining accuracy while improving the machining efficiency, the paper summarized the self-adaptive spacing and step distance calculation method. The results which verified by a simulation analysis were validity and reliability, and provide a new thinking and beneficial reference for the research of other similar NC programming technology.

Study on Inner Cooling Grinding in a General Surface Grinding Machine

2014 ◽  
Vol 496-500 ◽  
pp. 1189-1192
Author(s):  
Ying Hua Liao ◽  
Yong Wang ◽  
Liang Dong Zhang
Keyword(s):  
Surface Grinding ◽  
Cutting Fluid ◽  
Grinding Wheel ◽  
Grinding Temperature ◽  
Fluid System ◽  
Cooling Surface ◽  
General Surface ◽  
Grinding Mechanism ◽  
Grinding Machine

According to inner cooling surface grinding mechanism, a device for inner cooling surface grinding in a general surface grinding machine M7130 is developed. And the device includes there parts, i.e. grinding wheel with radial holes, grinding carriage and cutting fluid system. When grinding, cutting fluid provided by the cutting fluid system is directly sprayed into the grinding zones through the radial holes of the grinding wheel under the action of centrifugal force, and the closure of the grinding zones is destroyed. So the cooling effect of cutting fluid is improved and the grinding temperature is reduced. Further, grinding burn and crack are effectively avoided and the quality of planet grinding is improved. The grinding of difficult-to-machine materials such as Titanium alloy can be realized with the help of general surface grinding machine of the developed device.

Temperature control in a chemical reactor through variable area of the heat transfer surface. Simulation analysis

1982 ◽  
Vol 47 (2) ◽  
pp. 430-445
Author(s):  
Josef Horák ◽  
Zina Valášková
Keyword(s):  
Heat Exchange ◽  
Simulation Analysis ◽  
Batch Reactor ◽  
Chemical Reactor ◽  
Rate Of Change ◽  
Action Variable ◽  
Heat Exchange Surface ◽  
Relay With Hysteresis ◽  
Exchange Surface

An algorithm has been developed and on a mathematical model analyzed to stabilize the reaction temperature of a batch reactor. The reaction has been a zero-order one and the reactor has been operated in a instable operating point. The action variable is the heat exchange surface whose area is increased if the temperature is above, or decreased if the temperature is below the set point. The following two-point regulators have been studied: An ideal relay, a relay with hysteresis and an asymmetric PD relay. The effect has been discussed of the parameters of the regulators on the quality of regulation. Stability analysis has been made of the stationary switching cycles and the domains of applicability have been determined for individual regulators with respect to the rate of change of the area of heat exchange surface.

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