Spiral bevel gears are key components of aviation power transmission systems, and their machining accuracy directly affects the meshing quality of spiral bevel gear pairs and the transmission performance of the entire transmission system. At present, spiral bevel gears can be divided into five knife method and full process...
1) With the increase of load from 1 N · m to 5 N · m, the area of engagement mark increases, the maximum bending stress of tooth root increases from 29.2 MPa to 128.6 MPa, and the maximum contact stress of tooth surface increases from 501.1 MPa to...
The maximum values of tooth root bending stress and tooth surface contact stress under different axial installation errors of spiral bevel gear small wheel, spiral bevel gear big wheel and shaft intersection angle are shown in the figure. It can be seen from the figure that negative axial installation...
The semi hobbing method for small module spiral bevel gears is feasible. Cutting speed can be improved if coating can be applied to the tool or if the blade type tool is made of cemented carbide. Cutting time for wheel and pinion can be further reduced, and the promotion...
The influence of the installation error of the shaft intersection angle on the engagement mark of the spiral bevel gear pair is shown in Figure 1. It can be seen from Figure 1 that as the installation error of the shaft intersection angle increases from − 0.2 ° to...
When the rated load of small module spiral bevel gear pair is 3 N · m, the instantaneous contact ellipse of large gear tooth surface without considering the installation error of gear pair is shown in Figure 1 (a). To facilitate comparison, all the instantaneous contact ellipses of the...
Currently, the only mechanical transmission gear milling machine available is the No. 102 small module gear milling machine from Gleason Company in the United States. When machining large wheels, the 1:1 roll ratio method is used to achieve large wheel cutting processing, but the large wheel rotates during processing....
Figure 1 shows a small module spiral bevel gear wheel used for machining on an agricultural machine. The specific parameters are: module 1.35mm, tooth number 38, concave pressure angle 22.552 °, convex pressure angle 17.813 °, spiral angle 35 ° 1 ′ 11 ″, left rotation, shaft intersection angle...
Table 1 shows the basic geometric parameters of the double double sided method small module spiral bevel gear pair. According to the double double sided method tooth cutting calculation table, the gear pair cutter parameters and machine tool processing parameters can be obtained as shown in Table 2. Gear...
The double faced normal spiral bevel gear pinion uses a double faced cutter head. The schematic diagram of the normal section of the double faced cutter is shown in Figure 1. In the figure, the coordinate system S0 (X0, Y0, Z0) is fixedly connected to the blade. The coordinate...