Abstract:The milling process of 4Cr5MoSiV1

atypical hot work die steel

is taken as the research object The high speedmilling experiment is carried out with the double edge ball head milling cutterThe laser displacement sensor is used to measure the cutting amplitude A of thetool under the different condition of tool overhang L and spindle speed n Atthe same time

with the help of highspeed photography system and 3D forcemeasuring instrument

the working state of milling cutter in the cuttingprocess is monitored in real time Combined with the highprecision opticalscanning system

the mesoscopic morphology characteristics of the machinedsurface and tool wear are obtained Finally

the characteristic curve of4Cr5MoSiV1 milled by the ball head cutter is obtained The results show thatwhen milling 4Cr5MoSiV1 with a 20mm diameter ball head cutter

the variation ofthe three elements of the cutting amplitude A

the roughness Ra and the toolwear w is not a simple linear relationship with the tool overhang L and thespindle speed n In particular

the cutting amplitude A and roughness Ra show astate of fluctuation up and down with a constant value as the center in thecutting direction In addition

it is also found that the cutting is not morestable when the tool overhang L is shorter and the spindle speed n is higherFor ball end mill of a specific diameter

both of them have a value that canoptimize the cutting state

and this value can be measured by noloadcalibration and cutting experiments