The Analysis of Four-Axis Belt Grinding for Marine Propeller Blade

2010 ◽  
Vol 154-155 ◽  
pp. 647-653
Author(s):  
Jian Qiang Wu ◽  
Yun Huang ◽  
Zhi Huang

Marine propeller blade is composite of the free form surface, its machining method has been a difficult thing. The blade is processed by 4-axis belt grinding machine in this experiment, this paper analyze that the wear of the abrasive belt and the processing precision and the material removal rate of the blade according to the grinding performance of the blade material, the structural features of the vane, and the theory of 4-aixs belt grinding machine. Draw formulas with time for the belt wear height and the actual grinding depth. The life expectancy of the ceramic abrasive belt is the longest, and its the material removal rate is maximum in Three kinds of belt,and when the belt line speed is 30m/s or so, the material removal rate is maximum.

2011 ◽  
Vol 487 ◽  
pp. 452-456 ◽  
Author(s):  
Hai Long Wu ◽  
Yun Huang ◽  
Zhi Huang ◽  
G.J. Cheng

Blades are the key parts of the turbine, which usually use materials such as 1Cr13 stainless steel. These materials are of high strength, great toughness, and good thermo hardening, but the process is difficult. Abrasive belt grinding has good grinding performance. Grinding tests of three kinds of abrasive belts were carried out on 1Cr13 stainless steel; the relationship between the material removal rate and the species, such as abrasive belt type, belt speed, the normal grinding force, and grinding fluid, was studied; after the belt grinding, the microscopic morphology of the surface was analyzed by SEM, and it revealed that the differences of the micro structure and basic wear law of different abrasives. The results show that in the process of abrasive belt grinding, the ceramic abrasive belt has the highest material removal rate. The material removal rate of alumina and zirconium corundum abrasive belt reached the maximum when Vs is about 25m/s or so, and ceramic abrasive belt is stable to maintain high material removal rate when Vs is at the speed range of 28 to 32m/s. The material removal rate can be improved several times when using grinding fluid of butter.


2019 ◽  
Vol 104 (5-8) ◽  
pp. 2715-2726 ◽  
Author(s):  
Lijuan Ren ◽  
Guangpeng Zhang ◽  
Yuan Wang ◽  
Qian Zhang ◽  
Fei Wang ◽  
...  

2013 ◽  
Vol 797 ◽  
pp. 55-60
Author(s):  
Yu Hui Chen ◽  
Yun Huang ◽  
Yao Huang

In order to change the current situation of gun-receiver manual polishing, the paper presents a new process for abrasive belt grinding of gun-receiver material (C50 steel). Orthogonal test were conducted with abrasive belt grinding of C50 steel to do research on material removal rate and surface roughness. The best parameter combination to the optimization design which can guarantee high material removal rate and low surface roughness was obtained by using grey relational analysis method and verified by experiments. The above mentioned research not only can improve the removal rate of C50 steel, but also do help to prolong the service life of the belt. Whats more, it can guide a theoretical significance and practical value to the production practice.


2012 ◽  
Vol 602-604 ◽  
pp. 2273-2278
Author(s):  
Ping Zhang ◽  
Jia Chun Li

As a new process, the abrasive belt grinding plays an increasingly important role in the field of machining. It meets a variety of processing requirements. The concept of abrasive belt grinding and its working principle were introduced, and a new type of abrasive belt grinding equipment for removing the rust on steel wire surface was designed. Some key experiments for testing grinding force,the metal removal rate,belt wear rate、grinding ratio,grinding depth and wire speed were studied. The research work provides rational parameters for the pretreatment of rust removal in metal wire drawing processing.


2016 ◽  
Vol 693 ◽  
pp. 1082-1089 ◽  
Author(s):  
Rong Quan Wang ◽  
Jian Yong Li ◽  
Yue Ming Liu ◽  
Wen Xi Wang

The heavy belt-grinding is a new machining method, which combined the characters of heavy-duty grinding and belt-grinding together, with high efficiency and low cost. In the present paper the removal rate model of heavy belt-grinding in manufacturing of U71Mn steel is established. It is assumed that the distribution of the abrasive particles protrusion height of the abrasive belt surface closes to Gaussian distribution. The model is presented by calculating the removal volumes of all abrasive grains contributing to cutting action based on the probability theory, elastic-plastic mechanics and abrasive cutting theory. It is analysis that the material removal rate depends essentially on the mechanical properties of the workpiece and the belt and the grinding conditions. It is proportional to the average pressure, belt velocity and the indentation depth and is inverse proportion to the grain size.


2002 ◽  
Vol 124 (3) ◽  
pp. 702-707 ◽  
Author(s):  
Jun Qu ◽  
Albert J. Shih ◽  
Ronald O. Scattergood

Results of applying the wire Electrical Discharge Machining (EDM) process to generate precise cylindrical forms on hard, difficult-to-machine materials are presented. The design of a precise, flexible, and corrosion-resistant underwater rotary spindle is first introduced. A detailed spindle error analysis identifies the major sources of error at different frequency spectrum. The spindle has been added to a conventional two-axis wire EDM machine to enable the generation of free-form cylindrical geometries. The mathematical model for material removal rate of the free-form cylindrical wire EDM process is derived. Experiments were conducted to explore the maximum material removal rate for cylindrical and 2D wire EDM of carbide and brass work-materials. Compared to the conventional 2D wire EDM of the same work-material, higher maximum material removal rates may be achieved in the cylindrical wire EDM, possibly due to better debris flushing condition.


2014 ◽  
Vol 1017 ◽  
pp. 92-97 ◽  
Author(s):  
Die Zhang ◽  
Yun Huang ◽  
Xian Yin ◽  
Li Qi Zhou ◽  
Yu Hang Yang ◽  
...  

Abrasive belt grinding experiments of ZrO2Engineering Ceramics are carried out by using 4 different abrasive belts. The orthogonal test with zirconia-corundum belt was to get the best grinding parameter, the amount of material removal workpiece surface roughness and belt wear were measured to get the best grinding parameter.In this paper,the influence of abrasive belt granularity and different grinding parameters to grinding efficiency and workpiece surface quality throughout the process of grinding ZrO2Engineering Ceramics was analyzed. Analysis wear mechanism of engineering ceramics based on the Abrasive cutting model by observing the surface morphology. The results show that increasing the grinding force or the abrasive belt granularity can decrease the workpiece surface roughness;With the abrasive belt speed or grinding force increasing,the material removal rate and the wear ratio to some extent, but brittle fracture is occued easily on its surface when exceeds the critical value; When the abrasive belt speed is 19m/s,the grinding force is 15N and the abrasive belt granularity is 120#, ZrO2Engineering Ceramics grinding effects reach the best.


2005 ◽  
Vol 291-292 ◽  
pp. 371-376 ◽  
Author(s):  
T. Saito ◽  
S. Ito ◽  
Y. Mizukami ◽  
O. Horiuchi

Recently a technique has been developed to mold aspheric glass lenses by using cemented carbide dies at elevated temperature. The dies are precisely ground by an ultraprecision grinding machine. However the obtained form accuracy is generally around 100nm and is not enough high. In this study, to investigate a possibility of corrective figuring of the dies, a series of experiments of abrasive jet machining of cemented carbide was conducted and fundamental machining characteristics were examined. The used abrasives were fine grains of silicon carbide and aluminum oxide. The silicon carbide abrasives could accomplish a sufficient material removal. Both the material removal rate and the surface roughness increase as the collision angle increases up to 90 degrees. Therefore, in order to obtain a smooth surface finish, it was necessary to take a smaller collision angle and to slow down the material removal rate.


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