Removal Process Technology of Precision Grinding for Complicated Surface Part of High Performance Hard and Brittle Materials

2007 ◽  
pp. 123-127
Author(s):  
Tian Ji ◽  
Dong Ming Guo ◽  
Gui Hong Bian
Keyword(s):  
High Performance ◽  
Brittle Materials ◽  
Process Technology ◽  
Precision Grinding ◽  
Surface Part ◽  
Removal Process ◽  
Hard And Brittle Materials ◽  
Complicated Surface

Removal Process Technology of Precision Grinding for Complicated Surface Part of High Performance Hard and Brittle Materials

2007 ◽  
Vol 359-360 ◽  
pp. 123-127
Author(s):  
Tian Ji ◽  
Dong Ming Guo ◽  
Gui Hong Bian
Keyword(s):  
High Performance ◽  
Screening Method ◽  
Brittle Materials ◽  
Precision Machining ◽  
Grinding Wheel ◽  
Process Conditions ◽  
Process Technology ◽  
Removal Process ◽  
Hard And Brittle Materials ◽  
Complicated Surface

Some key parts used in such area as the national defence are made of high performance hard and brittle materials, and they should meet not only the requirement of geometry accuracy but also that of specified physical performance in manufacturing. The Radome is one of such key parts in the active homing guidance weapon, with a typical complicated surface. In order to meet the electric thickness requirement, a controlled removal grinding point-by-point is needed for the radome during its precision machining. A special 3-coordinates equipment with spherical diamond grinding wheel is adopted; the grinding paths are generated in the planes normal to the cutter axis with a Z-level profile machining method; the feed step is determined by step screening method; and the stepping between layers is carried out according to the remaining scallop crest height. Process conditions including the grinding depth and the workpiece speed are determined through experiments, and the process errors under different processing conditions are analyzed to put forward an optimized processing tactics. As a result, a basis for precision removal process of any other part of high performance hard and brittle materials with complex surface is established, and a technology support for precision machining of key parts in the national major projects is provided.

scholarly journals Study on the Algorithm of Three-Dimensional Surface Residual Material Height of Nano-ZrO2 Ceramics under Ultra-Precision Grinding

Micromachines ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1363
Author(s):  
Yanyan Yan ◽  
Zhaoqing Zhang ◽  
Junli Liu ◽  
Haozhe Yan ◽  
Xiaoxu Wang
Keyword(s):  
Surface Quality ◽  
Calculation Method ◽  
Material Removal ◽  
Three Dimensional ◽  
Brittle Materials ◽  
Precision Grinding ◽  
Removal Process ◽  
Residual Material ◽  
Hard And Brittle Materials ◽  
Ultra Precision

A large number of studies have shown that the height of a residual material is the key factor affecting the surface quality of ultra-precision grinding. However, the grinding process contains several random factors, such as the randomness of grinding particle size and the random distribution of grinding particles, which cause the complexity of the material removal process. In this study, taking the Nano-ZrO2 as an example, the removal process of surface materials in ultra-precision grinding of hard and brittle materials was analyzed by probability. A new calculation method for the height of surface residual materials in ultra-precision grinding of Nano-ZrO2 was proposed, and the prediction model of the three-dimensional roughness Sa and Sq were established by using this calculation method. The simulation and experimental results show that this calculation method can obtain the more accurate surface residual material height value which accords with the characteristics of three-dimensional roughness sampling, which provides a theoretical reference for the analysis of the material removal process and the surface quality evaluation of ultra-precision grinding of hard and brittle materials.

Technological Possibilities of Low-Temperature Precision Grinding Process when Machining Hard and Brittle Materials

2002 ◽  
Vol 223 ◽  
pp. 149-156 ◽  
Author(s):  
B.I. Batiashvili ◽  
D.S. Butskhrikidze ◽  
G.A. Mamulashvili ◽  
R.S. Turmanidze ◽  
Karl Kromp ◽  
...  
Keyword(s):  
Low Temperature ◽  
Brittle Materials ◽  
Grinding Process ◽  
Precision Grinding ◽  
Hard And Brittle Materials

Electrical Discharge Dressing (EDD) of Metal Bonded Diamond Arc Grinding Wheels

2016 ◽  
Vol 1136 ◽  
pp. 412-417 ◽  
Author(s):  
Fei Hu Zhang ◽  
Kai Wang ◽  
Zhong De Liu ◽  
Zhao Kai Ma ◽  
Dian Rong Luan
Keyword(s):  
Electrical Discharge ◽  
Brittle Materials ◽  
Cemented Carbides ◽  
Grinding Wheels ◽  
Electrical Parameters ◽  
Precision Grinding ◽  
Pulse Period ◽  
Hard And Brittle Materials ◽  
Grinding Operations ◽  
Electrical Discharge Dressing

Metal bonded diamond grinding wheels are very important for precision grinding operations of hard and brittle materials especially like ceramics or cemented carbides. But the trueing and dressing problem has affected its wide use. In this paper, a new EDD (Electrical discharge dressing) device was developed for the dressing of metal bonded diamond arc grinding wheels. The EDD experiments were carried out with the new dressing device. The influence of dressing parameters on the dressing efficiency and precision was studied. Experimental results shown that the increase of pulse period and duty period helped improve the dressing efficiency in a certain range. The higher electrical parameters could get better dressing efficiency. The detection results revealed that the error of the arc profile after EDD could reach to around 3μm. mazhaokai2014

scholarly journals Ductile streaks in precision grinding of hard and brittle materials

Sadhana ◽  
2003 ◽  
Vol 28 (5) ◽  
pp. 915-924 ◽  
Author(s):  
V. C. Venkatesh ◽  
S. Izman ◽  
S. Sharif ◽  
T. T. Mon ◽  
M. Konneh
Keyword(s):  
Brittle Materials ◽  
Precision Grinding ◽  
Hard And Brittle Materials ◽  
Ductile Streaks
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