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拉刀夹头中都采用钢球限位夹持快换机构。拉削时的切削力全部作用在该钢球上,由于钢球的硬度比拉刀头部的硬,所以拉刀头部常被钢球拉出凹坑。造成退刀困难,有时不得不用鎯头击打夹头,拉刀因此而变形,从而降低拉刀和夹头的寿命。为了改变上述情况,我们设计了一种非常适用,简便、快速的拉刀夹头,如图所示。该夹头采用楔爪机构,在夹头内孔均布三个楔爪,楔爪斜面与拉刀头部斜面为线接融(钢球与拉刀为点接触),故对拉刀不
Broach Chuck are used in the ball limit clamping quick change agencies. Cutting force when broaching all the role of the ball, the hardness of the ball than the broach head hard, so the broach head is often pulled out of steel pits. Resulting in difficult to retract the knife, and sometimes had to hit the head with the bow head, the broach as a result of deformation, thereby reducing the life of broaches and chucks. In order to change the above situation, we designed a very suitable, easy and fast broach chuck, as shown. The chuck adopts a wedge claw mechanism, and three wedge claws are evenly distributed in the inner hole of the chuck. The slope of the wedge claw and the slope of the broach head are in line connection (the ball and the broach are in point contact), so the broach