规模不变。可以看出，随着毛坯斜度的减小，转轮与毛坯斜率之间的初始接触点

The scale is unchanged. It can be seen that as the slope of the blank decreases, the initial contact point between the runner and the slope of the blank is F. Gradually from wheel to wheel J. Obviously, when this happens, the rear wheels will be forced to undertake the task of thinning the front wheels. Similarly, as the wheel forming angle changes, a similar phenomenon will occur, as shown in the figure above.

规模不变。可以看出，随着毛坯斜度的减小，转轮与毛坯斜率之间的初始接触点为F。从车轮逐渐到车轮J。显然，当这种情况发生时，后轮将被迫承担前轮减薄的任务。同样，随着车轮成形倾角的变化，也会出现类似的现象，如上图所示。

The scale remains the same. It can be seen that the initial contact point between runner and billet slope is f with the decrease of billet slope. From wheel to wheel J. Obviously, when this happens, the rear wheel will be forced to undertake the task of front wheel thinning. Similarly, with the change of wheel forming angle, similar phenomena will appear, as shown in the above figure.