In order to further verify the correctness and effectiveness of the profile design method of the rake face of the hobbing chamfering tool, the hobbing chamfering experiment of cylindrical helical gear is carried out on a domestic NC chamfering machine (shown in Fig. 1).
Firstly, input the data of cylindrical helical gear, hobbing chamfering tool and clamping, and install the designed tool on the tool bar; Secondly, rotate the a-axis to adjust the tool installation attitude; After adjustment, execute the motion cycle program to cut chamfering, the cylindrical helical gear rotates around the c axis, the tool rolls with the cylindrical helical gear around the b axis, and feeds axially in the direction parallel to the Z axis. The experimental results of chamfering are shown in Fig. 2 (a) and (b); Observe and measure the chamfered target profile by using the super depth of field three-dimensional microscope system, as shown in Fig. 2 (c) and (d), where (c) and (d) respectively represent the right profile and left profile of the chamfered cylindrical helical gear. The chamfered tooth profile is smooth and flat, uniform and free of vibration marks. At the same time, the chamfering amount of the left and right tooth profiles is basically the same except the size of the transition arc. Compare and analyze with the simulation results in Fig. 3, considering the machining and measurement errors, The actual measured chamfering errors of tooth profile are within 0.02mm, which verifies the effectiveness of the calculation method of tool rake surface profile and chamfering simulation.
