Some problems and solutions in the use of inner hole deburring chamfering cutter

Some problems and solutions in the use of inner hole deburring chamfering cutter

In the process of machining, due to the factors of machining environment (machine tool, coolant and fixture), different tools will encounter one or another problems. Similarly, the inner hole deburring chamfering cutter will also encounter problems in the use process, whether it is the imported heule inner hole deburring chamfering cutter or savant inner hole deburring chamfering cutter.

Then we need to be able to formulate corresponding solutions according to various problems in debugging:

Because the deburring and chamfering cutters for inner holes are all flexible (elastic) cutters, one of the most common problems in the machining process is the vibration marks on the chamfered surface, which are caused by: 1. The clamping strength of workpiece or tool is not enough. The corresponding solution is to ensure that the workpiece and inner hole deburring and chamfering tools are fixed firmly. This problem is also easy to solve. We will judge it through the sound of machining vibration in the machining process. 2. The deburring and chamfering tool is in an unstable state. The most common problem is the instability caused by too small elasticity. The solution is to increase the feed rate of the blade and increase the blade force. 3. Too high rotating speed will also lead to chattering on the chamfered surface. At this time, we need to reduce the processing speed (constant feed) to solve the problem of chattering on the chamfered surface.

Many customers worry that the inner hole deburring chamfering cutter will cause indentation on the inner hole wall when chamfering and deburring. The outside of the edge of our inner hole deburring chamfering cutter is grinded with a special round head, and the finish is relatively high. Generally, it will not affect the inner wall of the hole, but only produce a slight extrusion trace on the inner wall of the hole. However, if the customer finally reams or grinds the inner hole, If the finish requirement is higher than Ra1.6, we suggest that the inner hole deburring chamfering cutter can be used before reaming or grinding, so as to achieve the purpose of no burr after the last processing.

Control of chamfer size: because our inner hole deburring chamfering cutters are elastic (flexible) control, the chamfer size can be relatively controlled. Feed control: the larger the feed, the shorter the cutting time, and the smaller the chamfer; The smaller the feed, the larger the chamfer. Blade force control:The blade force can be adjusted by adjusting the tail screw. The larger the blade force, the larger the chamfer size, and the smaller the blade force, the smaller the chamfer size. Tool size control: usually, when selecting the deburring and chamfering tool for the inner hole, we will choose a smaller specification (because the part of our blade protruding from the tool bar is large). Then, the larger the tool specification selection, the larger the chamfer size, and the smaller the tool selection specification, the smaller the chamfer size. For details, please refer to the tool drawings provided by our company.

About the problem of cross hole chamfering and deburring: firstly, the standard inner hole deburring and chamfering cutter cannot be used if the aperture ratio is too large, because when machining the cross hole with large aperture ratio, the actual blade edge does not participate in the cutting in the downhill process, but the back face of the blade is rubbing with the workpiece. At this time, we will design non-standard tools or non-standard blades according to the customer's drawings, and increase the back angle of the blade as much as possible to realize the chamfering and deburring of large aperture ratio inner hole.