Requesting the calculation formula and instructions for Y3150E gear hobbing machine

New method of hobbing small helix angle cylindrical gears Summary When hobbing small helix angle cylindrical gears, the differential calculation formula of hobbing ordinary helical cylindrical gears is used to obtain a very small differential gear ratio. As a result, the hanging wheel cannot be selected. This article introduces a calculation method for adjusting the hanging wheel of hobbing small helix angle cylindrical gears. Keyword Minimum transmission ratio hanging wheel calculation formula 1 Overview When processing helical cylindrical gears on the gear hobbing machine Y3150E, the split gear hanging wheel is adjusted by the number of hob heads and the number of teeth of the processed gear, see formula (1); by the spiral of the processed gear Angle adjustment differential hanging wheel, see formula (2). (1) (2) On the Y3150E gear hobbing machine, the split-gear hanging wheel and the differential hanging wheel must be replaced with a set of matching wheels, and the number of teeth ranges from 20 to 100. From this, we can find the minimum transmission ratio that can be adjusted by this set of hanging wheels: When the helix angle of the workpiece is small or the gear module is large, the transmission ratio of the differential hanging wheel will be too small, making it impossible to match. When changing the hanging wheel, for example, mn=2,k=1,β=0°20′, it is obtained from formula (2): i2=0.026179791. Another example is when mn=8, β=2°, k=1, from formula (2): i2=0.039261933. For the above two situations, since i2

Take Δ=0.04, f=e=36, k=1 and look up the table or calculate from formula (4). Substitute the obtained a, b, c, d into formula (4) to get Δ1=0.040128411. (2) Find the differential suspension Take f=1.41mm/r, then check the machine tool manual and calculate the actual f=1.409881219mm/r. From the meaning of the question, take reverse milling, then we have k=1 in the formula. Check the hanging wheel manual or calculate (3) hanging wheel. Ratio error check: The ratio error of the split-gear hanging wheel is 0, and the ratio error of the differential hanging wheel is less than 6 parts per million, which meets the accuracy requirements. (4) Adjustment of the installation angle of the hob tool holder. The adjustment method of the tool holder installation angle is the same as that for processing ordinary helical cylindrical gears. The adjustment in this example is as follows: the helix angle of the hob is ω=4°27′, and the helix angle of the workpiece is β=2°. Since a right-hand hob is used to process right-hand gears, the installation angle of the hob tool holder is δ= β-ω=2°27′. The adjustment of the hob tool holder is as shown in the figure (the reference system is standing at the operating position of the hobbing machine and looking from right to left). It can be seen from the figure that the counterclockwise rotation angle of the hob axis relative to the top surface of the workpiece is δ=2°27′.