Study On Grinding Performance Of CNC Camshaft Grinder

With the national emphasis on environmental protection,vehicle and engine emission requirements more stringent,also put on the camshaft manufacturing control valve opening and closing mechanism of the new requirements,to open and close the valve to control more accurate,the phase of the cam shaft angle and lift error precision requirements increase,the traditional processing method of the camshafts it is difficult to meet the requirements,which prompted the CNC camshaft grinder has been rapidly developed and popularized,CNC camshaft grinding machine mostly adopts CBN grinding wheel speed,improve processing efficiency and surface quality has been improved,but also brought new problems.For example,the influence of the grinding wheel speed on the tangential grinding force and the power of the main motor of the grinding wheel,the CBN grinding wheel dressing,the cooling speed of the grinding wheel speed and the surface damage,etc.The energy saving and environmental protection of NC camshaft grinding machine is what we pursue,and the grinding ratio can be much larger than other processing methods.Cam shaft grinding machine total power abroad to about 90 k W,and the cam shaft grinding machine total power domestic and some have reached about 120 k W,which makes the camshaft grinding energy consumption,how to reduce energy consumption,we improve from the wheel speed of the tangential grinding force in grinding power research,mainly on the tangent the grinding work,the wheel speed and the tangential grinding force measurement and analysis,the wheel speed and the relation between the tangential grinding force and power,to achieve energy efficiency,make the CNC camshaft grinder design is more reasonable.CNC camshaft grinding machine using CBN grinding wheel grinding wheel dressing on the quality of the surface of the cam is very large.Truing and dressing including repair type,select the appropriate ratio of dressing for different grinding wheels,the trimming speed ratio and radial feed different,through the measurement of grinding camshaft surface roughness,draw a reasonable grinding speed ratio range for camshaft processing enterprises reference.The test found that the ratio of removal rate of Z^’and the tangential grinding force in the same F_t wheel speed under the unit width of metal is a certain value,quantitative analysis on the influence of grinding chilled cast iron camshaft cam width and grinding power and speed of grinding wheel,the grinding wheel grinding unit width power test,the shaft grinding machine design in the days after the CNC cam grinding power unit according to the width of the grinding wheel and the grinding wheel width of cam on the main motor power of choice,in order to achieve the purpose of energy efficiency.The specific grinding energy decreases with the increase of the tangential grinding force,and the larger the tangential grinding force is,the lower the specific grinding energy is.That to increase the grinding force in the case of metal cutting is easy to be removed,this is because with the increase of grinding force to cut the metal cutting layer thickness cause;to increase the wheel speed of grinding force under the condition of the same cutting grinding energy ratio increases,the higher the speed of grinding wheel,grinding ratio can the higher value.The results show that the thickness of the metal chip becomes thinner when the grinding wheel speed increases.It can be seen that the same volume of metal cutting into a finer chip than the cutting into a thick chip to consume more energy.