scholarly journals Development of a New Ultra-precision Grinding Wheel Based on the Structure of Natural Whetstones (1st report)

2005 ◽  
Vol 71 (12) ◽  
pp. 1531-1535
Author(s):  
Namiko SAITO ◽  
Jun-ichi IKENO ◽  
Takato TAKEMURA
Keyword(s):  
Grinding Wheel ◽  
Precision Grinding ◽  
Ultra Precision

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

2009 ◽  
Vol 69-70 ◽  
pp. 39-43 ◽  
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.

A Study of a New ELID Grinding Fluid by BP Neural Network Model

2011 ◽  
Vol 58-60 ◽  
pp. 1792-1796
Author(s):  
Wei Li ◽  
Yu Jie Fan
Keyword(s):  
Neural Network ◽  
Bp Neural Network ◽  
Grinding Wheel ◽  
Precision Grinding ◽  
Elid Grinding ◽  
Environmental Friendly ◽  
Grinding Fluid ◽  
Hard And Brittle Materials ◽  
Ultra Precision ◽  
Bp Neural Network Model

Electronic in-process dressing (ELID) grinding will be a main technology of ultra-precision grinding which has been widely adopted to the ultra-precision and high effectively machining of hard and brittle materials. This study puts forward a new environmental friendly bamboo charcoal bonded (BCB) grinding wheel and develops a new ELID grinding fluid. An oxide layer is mostly determined by the electric performance of grinding fluid in the experiment. This paper founds a model to forecast grinding fluid’s electric performance by BP neural network and MATLAB. This method can be used in developing of ELID grinding machining fluid to improve the ELID grinding effect.

The Research of ELID Grinding Effect and Surface Quality on Carbonized Cold-Rolled Steel

2012 ◽  
Vol 229-231 ◽  
pp. 542-546
Author(s):  
J.L. Guan ◽  
Li Li Zhu ◽  
H.W. Lu ◽  
Zhi Wei Wang
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Grinding Wheel ◽  
Rolled Steel ◽  
Precision Grinding ◽  
Cold Rolled Steel ◽  
Elid Grinding ◽  
Peripheral Velocity ◽  
Ultra Precision ◽  
Cold Rolled

In this document, the electrolytic in-process dressing ( ELID ) grinding technique is used for ultra-precision processing experimental research on the carbonized cold-rolled steel (HRC60～80).A surface roughness of Ra6～8nm was obtained after ELID precision grinding. The results proved that adopting micro grain size (W1.5～W36) and high hardness cast iron based diamond grinding wheel, increasing the wheel peripheral velocity (18～20m/s) and reducing grinding depth can effectively improve surface quality and bring the surface roughness down. The wheel peripheral velocity, grinding depth as well as grinding fluid are the main factors during ultra-precision grinding.

High Precision Grinding Wheel Dressing Control Based on PLC

2011 ◽  
Vol 199-200 ◽  
pp. 1809-1812
Author(s):  
Zhao Ning ◽  
Tao Li ◽  
Guo Hui
Keyword(s):  
Control Method ◽  
Switching Time ◽  
Grinding Wheel ◽  
Precision Grinding ◽  
Face Gear ◽  
Precise Control ◽  
Plc Control ◽  
Gear Hobbing ◽  
Ultra Precision ◽  
Crucial Part

This paper explains PLC control method dealing with grinding wheel dressing, which can be utilized for ultra-precision aviation face gear processing etc. Among the previous processings, shapers and sphericity hob were applied. Whereas gear slotting processing and gear hobbing processing can not achieve project precision. Therefore this new solution was designed: fristly deal with wheel dressing problem, secondly dress face gear with grinding wheel previously dressed. This paper resolved the first problem, within which most crucial part is precise control of switching time. Timers application realized synchronization. There is a PLC managing two driving motors’ synchronization. Two motors working in different but fixed speeds, whilst switching directions at a precisely same time.

Study on the Machining Principle and Experiment of Grinding

2013 ◽  
Vol 395-396 ◽  
pp. 1000-1003
Author(s):  
Qiang Xiao
Keyword(s):  
New Technology ◽  
Surface Damage ◽  
Grinding Wheel ◽  
Process Technology ◽  
Precision Grinding ◽  
Brittle To Ductile Transition ◽  
Elid Grinding ◽  
Ductile Mode ◽  
Grinding Mechanism ◽  
Ultra Precision

ELID for SiC which enables the improvement of surface quality is put forward. ELID grinding technology is new technology of ultra-precision grinding, and the oxide film is formed on grinding wheel by electrolytic in-process technology, thus the wheel is in-process dressed. SiC material removal mechanism and ELID grinding mechanism is analyzed, the character and condition of brittle to ductile transition of SiC and surface formation mechanism of ductile mode grinding of SiC are studied, the results show that ELID grinding can realize ductile grinding ,this will lower the surface damage and improve the machining efficiency.

Surface Layer Damage of Quartz Glass Induced by Ultra-Precision Grinding with Different Grit Size

2017 ◽  
Vol 872 ◽  
pp. 19-24
Author(s):  
Zong Chao Geng ◽  
Shang Gao ◽  
Ren Ke Kang ◽  
Zhi Gang Dong
Keyword(s):  
Surface Roughness ◽  
Quartz Glass ◽  
Subsurface Damage ◽  
Grinding Wheel ◽  
Precision Grinding ◽  
Diamond Grinding Wheel ◽  
Diamond Grinding ◽  
Roughness Surface ◽  
Ultra Precision ◽  
Damage Depth

Quartz glass is a typical hard and brittle material. During the manufacturing process of quartz glass components, ultra-precision grinding is widely used due to its high throughput and good dimensional accuracies. However, grinding will unavoidably induce large surface and subsurface damage. In this study, the surface and subsurface damage characteristics of quartz glass substrates ground by diamond wheels with different grit sizes were investigated in terms of surface roughness, surface topography, subsurface microcrack characteristic, and subsurface damage depth. Discussion was also provided to explore corresponding reasons of surface and subsurface damage induced by diamond grinding wheels with different grit sizes of #1500 and #2000. The experiment results showed that the surface roughness, surface damage, and subsurface damage depth induced by #2000 quartz glass was ground by #1500 diamond grinding wheel, and in ductile mode when ground by #2000 diamond grinding wheel.

Research on ELID Ultra-Precision Grinding Performance of SiCp/Al Composites

2014 ◽  
Vol 614 ◽  
pp. 75-78
Author(s):  
Jia Liang Guan ◽  
Lei Zhu ◽  
Ling Chen ◽  
Xin Qiang Ma ◽  
Xiao Hui Zhang
Keyword(s):  
Surface Roughness ◽  
Cast Iron ◽  
Rotation Speed ◽  
Grinding Wheel ◽  
Feed Speed ◽  
Precision Grinding ◽  
Machined Surface ◽  
Elid Grinding ◽  
Machined Surface Roughness ◽  
Ultra Precision

The electrolytic in-process dressing (ELID) grinding technology was adopted for ultra-precision grinding experiments of SiCp/Al composites; the machined surface roughness can obtain Ra0.030μm. The experiments show that: with the grinding wheel rotation speed of 1500r/min, the grinding depth of 0.1μm, and feed speed of 2m/min and using W5 cast iron bonded diamond grinding wheel, the grinding effect can achieve optimal.

Research of the Grinding Mode Applied by the Cranfield BoX Ultra Precision Grinding Machine

2013 ◽  
Vol 712-715 ◽  
pp. 553-558
Author(s):  
Zhuang De Jiang ◽  
Shu Ming Yang ◽  
Jin Long Wang ◽  
Guang Tao Yuan ◽  
Xing Yuan Long
Keyword(s):  
Grinding Wheel ◽  
Precision Grinding ◽  
Wheel Surface ◽  
Cutting Depth ◽  
Workpiece Surface ◽  
Ultra Precision ◽  
Simulation Results ◽  
Grinding Machine

In this paper an efficient grinding mode which is employed by the Cranfield BoX ultra precision grinding machine is discussed. The equations of workpiece surface and grinding wheel surface are proposed and the grinding motion is simulated via Matlab. The trajectory of the changing cutting region is discussed. The simulation results show that this grinding mode is suit to manufacture low slope surfaces. Generally, the workpiece surface is steeper, and the cutting range of the machine is smaller. The angle of the spindle inclination, the grinding wheel width and the cutting depth should be chose properly for different manufacturing capacity.

Manufacturing Technology of α-Fe Bonded Grinding Wheel Free Abrasive

2018 ◽  
Vol 780 ◽  
pp. 111-115 ◽  
Author(s):  
Ji Cai Kuai ◽  
Dmitrii V. Ardashev ◽  
Jia Qi Zhang ◽  
Hua Li Zhang
Keyword(s):  
Oxide Film ◽  
High Surface ◽  
Grinding Wheel ◽  
Mirror Surface ◽  
Precision Grinding ◽  
Abrasive Particles ◽  
Elid Grinding ◽  
Abrasive Grain ◽  
Ultra Precision ◽  
Free Abrasive

ELID ultra-precision grinding mirror surface can achieve nanometer precision. However, after the grinding wheel passivates the abrasive particles in electrolysis, it is easy to scratch the ultra-precision ELID grinding surface into the grinding process. In order to solve this problem, a non-abrasive grain α-Fe bonded grinding wheel is propose, which contains no abrasive particles. After electrolysis, oxide film is formed on the surface of the wheel. In ultra-precision ELID grinding, there is no abrasive particles involved, only the polishing effect of oxide film. There is no need to worry about the scratching of exfoliated abrasive particles that have been machined on ultra-precision ELID surfaces. Thus achieving extremely high surface accuracy.

Sign in / Sign up

Export Citation Format

Share Document