Research on Remanufacturing Technology and Remanufacturing Process of Gear Grinding Machine

2021 ◽  
Keyword(s):  
Gear Grinding ◽  
Grinding Machine

Thermal error modelling of motorised spindle in large-sized gear grinding machine

2017 ◽  
Vol 231 (5) ◽  
pp. 768-778 ◽  
Author(s):  
He Dai ◽  
Shilong Wang ◽  
Xin Xiong ◽  
Baocang Zhou ◽  
Shouli Sun ◽  
...  
Keyword(s):  
Support Vector Machine ◽  
Machine Tools ◽  
Fuzzy Inference ◽  
Thermal Error ◽  
Support Vector ◽  
Inference System ◽  
Thermal Errors ◽  
Gear Grinding ◽  
Neuro Fuzzy ◽  
Grinding Machine

Thermal errors are one of the most significant factors that influence the machining precision of machine tools. For large-sized gear grinding machine tools, thermal errors of beds, columns and rotary tables are decreased by their huge heat capacity. However, different from machine tools of normal sizes, thermal errors increase with greater power in motorised spindles. Thermal error compensation is generally considered as a relatively effective, convenient and cost-efficient approach in thermal error control and reduction. This article proposes two thermal error prediction models for motorised spindles based on an adaptive neuro-fuzzy inference system and support vector machine, respectively. In the adaptive neuro-fuzzy inference system–based model, the temperature values are divided into different groups using subtractive clustering. A hybrid learning scheme is adopted to adjust membership functions so as to learn from the input data. In the particle swarm optimisation support vector machine–based model, particle swarm optimisation is used to optimise the hyperparameters of the established model. Thermal balance experiments are conducted on a large-sized computer numerical control gear grinding machine tool to establish the prediction models. Comparative results show that the adaptive neuro-fuzzy inference system model has higher prediction accuracy (with residual errors within ±2.5 μm in the radial direction and ±3 μm in the axial direction) than the support vector machine model.

Research on Forms of Grinding Allowance Based on NC Form Grinding Cylinder Gear

2010 ◽  
Vol 42 ◽  
pp. 276-279
Author(s):  
Hong Xia He
Keyword(s):  
Numerical Control ◽  
Grinding Wheel ◽  
Axial Section ◽  
Gear Grinding ◽  
Form Grinding ◽  
Section Shape ◽  
Grinding Machine

The machining principle and characteristics of form grinding cylinder gear are introduced as well as the characteristics of form grinding machine in this paper. By analyzing and comparing three kinds of grinding allowance for cylinder gear grinding, a reasonable and effective axial section shape is determined in experience, which is a practical profile to shape the axial section of grinding wheel for numerical control grinding cylinder gears.

First-Order Proportional Modification Parameters for Spiral Bevel Gears Manufactured by Spread Blade Method

2012 ◽  
Vol 246-247 ◽  
pp. 118-121
Author(s):  
Shui Qin Yu ◽  
Zhi Yong Wang ◽  
Jian Tang
Keyword(s):  
Spiral Bevel Gears ◽  
First Order ◽  
Form Errors ◽  
Bevel Gears ◽  
Gear Grinding ◽  
Calculation Point ◽  
Tooth Form ◽  
Spiral Bevel ◽  
Grinding Machine ◽  
Spiral Angle

The proportional modification parameters are useful for modifying the tooth form errors of spiral bevel gears. Based on the mathematical model for calculating the machine setting parameters and according to the relative position relationship between cutter and workpiece and the curvature and vector of calculation point, the formulae for calculating the first-order proportional modification parameters for gears machined by spread blade method was deduced. The proportional modification parameters can make the pressure angle or spiral angle of the concave flank and the convex flank produce uniform change and difference change. The formulae is verified by experiment on CNC spiral bevel gear grinding machine and M&M sigma 7 gear measuring center.

scholarly journals Study on Development of Servo-Spindle for NC Gear Grinding Machine Using Screw-Shaped CBN Wheel.

1995 ◽  
Vol 61 (587) ◽  
pp. 2988-2995
Author(s):  
Takashi Emura ◽  
Hisashi Nakamura ◽  
Masashi Yamanaka ◽  
Lei Wang ◽  
Yasushi Teshigawara
Keyword(s):  
Cbn Wheel ◽  
Gear Grinding ◽  
Grinding Machine

Dynamics Behaviors Analysis on the Column of Gear Grinding Machine

2012 ◽  
Vol 472-475 ◽  
pp. 1885-1888
Author(s):  
Ya Hui Wang ◽  
Xiao Zhong Ren
Keyword(s):  
Theoretical Basis ◽  
Natural Frequencies ◽  
Element Model ◽  
Vibration Modes ◽  
Ansys Software ◽  
Dynamic Behaviors ◽  
Structural Improvement ◽  
Gear Grinding ◽  
Column Structure ◽  
Grinding Machine

Aiming at the issue on the development of gear form grinding machine, a method for analyzing the dynamic behaviors of the machine column was introduced. Based on the model of gear grinding machine developed before, a suitable finite element model of the column was established firstly. Modal analysis on the column was carried out by means of ANSYS software, and the first five natural frequencies and vibration modes of the column were obtained. According to the analysis results, some improvements on the original column structure were made. By comparing the static and dynamic behaviors of several different rib structures presented, the best column structure is selected. This method offers theoretical basis for the structural improvement of gear grinding machine.

A Study on a High-Speed NC Gear Grinding Machine Using Screw-Shaped CBN Wheel

1992 ◽  
Author(s):  
T. Emura ◽  
L. Wang ◽  
A. Arakawa
Keyword(s):  
High Speed ◽  
Reduction Gear ◽  
Grinding Wheel ◽  
Magnetic Head ◽  
Two Phase ◽  
Cbn Wheel ◽  
Gear Grinding ◽  
Phase Type ◽  
Rotary Speed ◽  
Grinding Machine

Abstract This paper describes a basic study for the development of a high-speed NC gear grinding machine using screw-shaped CBN wheel. Gear grinding machines using screw-shaped grinding wheel have already developed by Reishauer and others. However, their productivity is not high, because they use one thread type grinding wheel and the rotary speed of the workspindle is very low. The maximum rotary speed of the grinding spindle developed by the authors is 12,000 rpm and that of workspindle is 3,000 rpm. They are enough speed for gear grinding. The desired accuracy for an angle sensor of grinding spindle is more than 20 ″pp in the case of the multithread type grinding wheel. The ordinary shaft encoder cannot respond at such a high-speed. Therefore the authors used a magnetic scale of high-accuracy and an induction type magnetic head. After experiments, it became clear that two-phase type PLL proposed by T. Emura is useful for detecting low level signals obtained from the magnetic head. Since the maximum rotary speed of the workspindle is raised to 3,000 rpm, we cannot use any reduction gear. Thus a direct-drive method with an inertial damper was used. The workspindle is controlled by using the two-phase type PLL. When we grind gears, the initial setting between rotary angles of grinding wheel and work is required. The authors tried to automatically set the initial rotary angles by using a CCD camera and a microcomputer.

Development of a Wheel Spindle for a Productive Type Gear Grinding Machine

1994 ◽  
pp. 203-208 ◽  
Author(s):  
Hisashi NAKAMURA ◽  
Masashi YAMANAKA ◽  
Takashi EMURA ◽  
Lei WANG
Keyword(s):  
Gear Grinding ◽  
Grinding Machine
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