Security measures the tool

Combined with high-speed cutter safety standards, through finite element analysis of the model, to meet security requirements, you can take the following measures:

1. Reduce the quality of the tool, the tool member to reduce the number of tools to simplify the structure

Obtained from the test of the different tools of the same diameter and the cutter body mass rupture limit, the number of components and the tool member between the contact faces, by comparison, the lighter the tool quality, the number of components and the less the contact  Diamond blade  member, the tool rupture speed limit is higher. Study found that using titanium as a tool to reduce the component material quality, improve tool rupture limits and speed limit. However, due to the sensitivity of titanium on the incision, not suitable for manufacturing the cutter body, so some speed cutter has been manufactured using high-strength aluminum alloy cutter body.

In the cutter body structure, should be taken to avoid and reduce the stress concentration, the groove on the tool body (including knife block slots, flute, keyway) will cause stress concentration, reducing the strength of the tool body and therefore should be avoided through the slots and bottom with sharp corners. Meanwhile, the structure of the cutter body in response to said rotary axis, the axis of the center of gravity Polycrystalline diamond cutter. Clamping blades and knife block, structural adjustment should be possible to eliminate backlash and require repeated positioning is good. Currently, high-speed milling has been widely used to connect the machine tool spindle HSK tool holders, a large extent improved tool system stiffness and repeat positioning accuracy, speed limit is conducive to the improvement of the tool rupture. In addition, high-speed milling machine clip revealing a diameter smaller diameter cutter teeth decreasing trends, but also conducive to the improvement of strength and stiffness of the tool.

2. Improved tool clamping

Simulation and experimental studies have shown that breakdown, speed cutter blade clamping method does not allow the usual friction clamping, use a blade with a central hole, screw clamping means, or with a special tool designed to prevent the blade structure rejection fly. Knife, the blade clamping force and the centrifugal force in the same direction the best direction, but to control the preload screw to prevent screw prematurely damaged due to overload. For small diameter shank cutters, thermal expansion and contraction can be hydraulic chuck or collet clamping achieve high precision and high rigidity.

3. Improve tool balancing of

Improve tool to improve speed cutter balancing of security is very helpful. Because the tool spindle system unbalance will generate an additional radial load, and its size is proportional to the square of the speed.