Take a pinion from the logarithmic spiral bevel gear pair, apply the prepared red lead powder evenly on the surface of the gear, place it horizontally on the workbench, and observe whether there is a dead angle, so as to obtain the best measurement angle. Considering the complex tooth surface shape of logarithmic spiral bevel gear, in order to comprehensively scan the left and right tooth surfaces of logarithmic spiral bevel gear, rotary scanning will be adopted.
Start the 3D family equipment, open the scanning software scan3dnow, move the 3damily laser lens to the rotation center, and align the central axis of the logarithmic spiral bevel gear with the thunder ray. Continue to move the X, y and Z axes. On the other hand, use the display grid key to highlight the leading edge of the logarithmic spiral bevel gear. Through the adjustment of laser power slider and image brightness contrast slider, satisfactory light effect is achieved. When transforming CCD, the image taken by transforming CCD will be displayed on the screen. Check whether the most prominent logarithmic spiral bevel gear is in the grid, and adjust the slider to check the image quality. Use the z-axis control key to make the lowest position of the logarithmic spiral bevel gear fall in the grid, convert the CCD view, determine that the lowest position of the logarithmic spiral bevel gear is in the grid, and press the z-axis scanning position positioning key to establish the starting position of the z-axis. Since the height of the logarithmic spiral bevel gear is 60mm, which is larger than the measuring stroke of the z-axis, first use the z-axis control key to move up 50mm each time, and then move the y-axis to adjust the highest position of the logarithmic spiral bevel gear to make it fall into the grid, record the times of movement of the z-axis, and input it into the band n in the band scan RGN. After determining the z-axis travel, set the scanning angle and scanning spacing (step) from the rotary scan RGN. At this time, the parameter setting of each axis of rotary scanning has been completed. First press the zero key to zero the T axis, and then press scan to set the scanning parameters. After parameter setting, click the scan button to start scanning. When the words “scanning process finished” appear on the screen, the scanning effect picture appears, as shown in the figure.
