Papers by Keyword: Abrasive Belt Grinding

Abstract: In this paper, based on micro wear form, an approach that using protrusion height, average tool angle, blunt area ratio and coated density to describe the wear of abrasive belt is put forward. The method for calculating the above parameters are also introduced. In experiments, we use the profilometer to collect the abrasive belt surface data and draw figures of the above parameters under service time, which indicates that using topography parameters can describe the degree of belt wear. According to parameters changing slope, the abrasive belt service time is roughly divided into two stages, initial wear stage and stable wear stage but no abrupt wear stage. Initial worn stage grains suffer more stress, patterns of wear are mainly severe wear and pull-off, while stable wear stage grains bear less stress and pattern of worn is dominated by mild wear. In addition to that, the other parameters changing trend is agreed and synchronous with protrusion height.

Abstract: In abrasive belt grinding, abrasive belt granularity, abrasive belt speed,feeding speed and grinding force have a great influence on the surface roughness. In order to predicate the surface roughness of Ti-6Al-4V,a response surface methodology are used to build the model to predict surface roughness,and the influence of various parameters on surface roughness was analysed. The research shows that with the abrasive belt granularity and abrasive belt speed increasing,the work piece surface roughness decreases;with the grinding force and feeding speed increasing,the work piece surface roughness increases. Through the test,the response surface methodology with high prediction accuracy,provides a theoretical basis for the reasonable selection of abrasive belt grinding parameters.

Abstract: Abrasive belt grinding experiments of ZrO₂ Engineering 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 ZrO₂ Engineering 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#, ZrO₂ Engineering Ceramics grinding effects reach the best.

Abstract: This paper presents an abrasive belt grinding robotic system solution for traditional aero-engine blade manual grinding situation. In order to overcome the limitation of traditional polishing robot teaching programming way and improve the efficiency of the robot offline programming and simulation of interactive, based on OpenGL robot programming and motion simulation platform with interactive features is constructed with VC++6.0. The result shows that the system is able to realistically simulate the movement of industrial robots grinding and polishing process, and it provides a reference for the other abrasive belt grinding and polishing robot off-programming and kinematics simulation development technology.

Abstract: This paper provides an analysis of the processing status and the existing problems of leading and trailing edges, and proposes a new seven-axis linkage CNC grinding method. Whats more, the paper carries out the forging blade edge abrasive belt grinding experiment. Finally, on the basis of experimental result, grinding process parameters are optimized, and the improved scheme is put forward. Through the experiment, the feasibility of the seven-axis CNC abrasive belt grinding method is verified.

Abstract: 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.

Abstract: This paper aimed at that titanium alloy grinding is easy to appear surface burn, crack, then carry out the titanium alloy TC4 abrasive belt grinding experiment, focus on the effect of grinding parameters on the titanium alloy TC4 surface integrity (surface roughness, microstructure and surface residual stress) . The results of the study show that the use of zircon corundum belt and cutting speed velocity range from 18 to 26 meter per second, the surface integrity of titanium alloy TC4 is better.

Abstract: Abrasion ratio is an important parameter to estimate the wear resistance of abrasive belt grinding, reacting the relationship between the material removal and the abrasive belt wear, and also, its value is an important basis to instruct the process of abrasive belt grinding. The mathematical model of material removal is obtained by analyzing the basic mechanism theory of centerless cylindrical grinding in this paper, and the impact curve which react the relationship between the abrasion ration and the material removal or cutting depth is obtained by using the software of Mathematica. The abrasion ratio is testified in this paper by the experiment test of abrasive belt grinding for the titanium alloy, 45# steel and 304# stainless steel, systematic analyzing the affection of abrasion ratio on the hardness ratio and the belt speed. Experimental result shows that: belt speed is superior than hardness ratio to the abrasion ratio, and the mathematical model of material removal is testified by this experimental research. So the mathematical model of material removal could be used with theoretical basis in belt grinding process.

Abstract: A highly efficient precision grinding method was proposed for the development of Zr-4 alloy used in nuclear industry. The key techniques to develop this new grinding machine are presented in detail, including soft grinding wheel head, ultrasonic thickness measurement system. An automatic polishing and grinding system was built, which is based on ultrasonic thickness measurement technology. According to a lot of grinding experiments, reasonable, accurate and efficient Zr-4 Alloy grinding parameters was determined. The experiments show that when the line speed of belt is about 18 m/s; the workpiece feed rate is 1000mm/min; grinding head cylinder pressure is 0.12Mpa, the silicon carbide abrasive belt of P80 particle size can get 0.02mm grinding amount and achieve excellent grinding effect.

Abstract: In abrasive belt grinding Titanium alloy blade of aviation engine experiment, through the single factor experiment method, the influence of abrasive belt linear speed and work-piece feeding speed on the grinding quantity is discussed. The relationship between the clogging degree of abrasive belt and grinding time is analyzed. Then the influence of abrasive belt linear speed and work-piece feeding speed on the clogging degree of belt is discussed. The results indicate that when grinding time is 3 ~ 30 min or so, the clogging degree of belt does not change significantly. Therefore the grinding process is relatively stable.