設定 CNC 加工鈦的刀具參數

設定車銑鈦刀具幾何參數，提高鈦合金零件的產品質量. 產品快速準時交付.
(1) 刀具前角γ0: 鈦合金切屑與前刀面接觸長度短. 當前角較小時, 可以增加晶片的接觸面積, 使切削熱和切削力不會過度集中在切割刃附近. 改善散熱條件, 並能強化切割刃並減少崩刃的可能性. 車削鈦一般取γ0=5°～15°.

(2) The clearance angle α0 of the tool: The processed surface of titanium alloy has large elastic recovery and serious cold hardening. The use of a large relief angle can reduce the friction, adhesion, adhesion, tearing and other phenomena caused to the flank surface, so as to reduce the wear of the flank surface. The relief angle of various cutting titanium alloy tools is basically greater than or equal to 15°.

(3) The leading deflection angle κr and the secondary deflection angle κ´r of the milling tool: When milling titanium alloys, the cutting temperature is high and the elastic deformation tends to be large. When the rigidity of the process system allows, the entering angle should be reduced as much as possible to increase the heat dissipation area of the cutting part and reduce the load per unit length of the cutting edge. 一般來說, κr=30° is used, and κr=45° for rough machining. Reducing the secondary deflection angle can strengthen the tool tip, which is beneficial to heat dissipation and reduces the surface roughness value of the machined surface. Generally take κ´r =10°～15°.

(4) The blade inclination angle of the tool λs: Due to the rough surface and uneven surface structure of the blank, the cutting edge is prone to chipping during rough turning. In order to increase the strength and sharpness of the cutting edge, the sliding speed of the chip should be increased. 一般來說, λs = -3°～-5° is used for rough turning, and λs = O° for fine turning.

(5) The radius of the nose arc of the tool rε: 車削鈦合金時, the tool tip is the weakest part, which is easy to chip and wear, so it needs to grind the tool tip arc. Generally rε=0.5～1.5mm.

Negative chamfering (bγ=0.03～0.05 mm, γ01=-10°～0°) is used during turning, and the arc radius of the bottom of the chip flute is Rn=6～8 mm.

另外, the quality of tool sharpening is also very important to improve its durability. Carbide cutting tools should be sharpened with diamond grinding wheels. The cutting edge must be sharp when cutting, the surface roughness Ra value of the front and rear cutting faces should be less than 0.4um, and the cutting edge is not allowed to have tiny gaps. After the tool is sharpened and ground, its durability can be increased by 30%.

Design of cutting edge angle for turning and milling titanium