Improvement of grinding performance in ultra-precision grinding of lens mould by the help of megasonic coolant

This paper puts forward an intelligent single-plane biaxial balance monitor system, which is used in ultra-precision grinding. It adopts the method of single-plane balance correction for the vibration of wheel and workpiece. And this system can also be used for integral balance. For ultra-precision grinding, caused by the mutual influence of the vibration of wheel and workpiece, there will be a ripple on the workpiece surface, which is mainly influenced by the frequency ratio of wheel to workpiece, the feed rate and the vibration of wheel and workpiece. This system can improve the machining accuracy, reduce the surface error of workpiece and appraise the integrated machining result, by analyzing the vibration data of wheel and workpiece and adjusting machining parameters.

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The FEM Simulation of Ultra-precision Grinding of Optical Glass with Micro-structured Coarse-Grained Diamond Wheels

Optical Design and Fabrication 2017 (Freeform, IODC, OFT) ◽

10.1364/freeform.2017.jtu5a.26 ◽

2017 ◽

Author(s):

Bing Guo ◽

Mingtao Wu ◽

Qingliang Zhao

Keyword(s):

Optical Glass ◽

Fem Simulation ◽

Coarse Grained ◽

Precision Grinding ◽

Ultra Precision

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Machined Surface Characteristics and Removal Mechanism of Soft and Brittle Solids

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.447-448.183 ◽

2010 ◽

Vol 447-448 ◽

pp. 183-187 ◽

Cited By ~ 1

Author(s):

Zhen Yu Zhang ◽

Rudy Irwan ◽

Han Huang

Keyword(s):

Surface Characteristics ◽

Abrasive Machining ◽

Precision Grinding ◽

Machined Surface ◽

Brittle Solids ◽

The Coefficient Of Friction ◽

Ultra Precision ◽

Ductile Removal ◽

Fracture Features ◽

Free Abrasive

Surface characteristics of CZT wafers machined using wire sawing, free abrasives lapping and polishing and ultra-precision grinding were investigated. Wire sawing resulted in the removal of material in both ductile and brittle regimes, but both polishing and grinding led to a ductile removal. The grinding produced very smooth surfaces free of embeddings and scratches, which is thus considered to have better machinability than the free abrasive machining. The nanoindentation and nanoscratch on MCT wafers at nanometric scales resulted in considerable plastic deformation, but no fracture features. The hardness of the MCT wafer was 500 to 550 MPa, and the coefficient of friction was particularly high, ranging from 0.45 to 0.55.

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Development of Vitrified Bond CBN Wheel for Internal Precision Grinding of the Air-Conditioner Compressor Piston Hole

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.304-305.29 ◽

2006 ◽

Vol 304-305 ◽

pp. 29-32 ◽

Cited By ~ 1

Author(s):

Hang Gao ◽

Y.G. Zheng ◽

W.G. Liu ◽

Jian Hui Li

Keyword(s):

Cost Effective ◽

Grinding Wheel ◽

Manufacturing Cost ◽

Air Conditioner ◽

Grinding Wheels ◽

Precision Grinding ◽

Grinding Performance ◽

Compressor Piston ◽

Vitrified Bond ◽

Cbn Grinding Wheel

Manufacturing of vitrified bond CBN wheels for internal precision grinding of the air-conditioner compressor piston hole is still big challenge to all of the domestic manufacturers. Recently, by choosing pre-melting mixed CBN abrasives and a proper sintering process, a cost-effective method was conceived to produce grinding wheels of comparative quality. The grinding performance of wheels was evaluated with a series of internal precision grinding of compressor piston hole. Experimental results show that the vitrified bond CBN grinding wheel produced by this method has better grinding performance, and can be substitute to the same type of grinding wheels imported. But the manufacturing cost is only 60% of the wheel imported according to estimation.

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Research on the 3-Axis CNC Ultra-Precision Grinding of Aspheric Mould

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.69-70.39 ◽

2009 ◽

Vol 69-70 ◽

pp. 39-43 ◽

Cited By ~ 1

Author(s):

Li Jun Li ◽

Fei Hu Zhang ◽

Shen Dong

Keyword(s):

Influence Factors ◽

Grinding Wheel ◽

Aspheric Surface ◽

Precision Grinding ◽

Form Accuracy ◽

Form Errors ◽

Machining Test ◽

Ultra Precision ◽

Grinding System ◽

Parallel Grinding

Parallel grinding is an effective method of aspheric moulds machining which is usually made of industrial ceramic such as silicon carbide (SiC) or tungsten carbide (WC), but if the spherical grinding wheel is not being with precision truing and dressing, the roughness and form accuracy of the ground aspheric surface should get worse, for this reason, in this paper, the influence factors of thoroughness and form accuracy induced by the wheel truing and dressing are studied firstly, and a new 3-axis CNC Ultra-precision grinding system which is based on the PMAC (Programmable Multi-axes Controller) is developed, through simultaneous motion of the controlled X, Z and B axis, the form errors which is induced by the grinding wheel can be improved theoretically, and the aspheric mould machining test shown that the surface roughness of Ra 0.025μm and the form accuracy of P-V 1.15μm are achieved.

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