Views: 19 Author: Site Editor Publish Time: 2020-12-02 Origin: Site
Schematic of idealized paane-strain skiving showing chip formation by smoothlaminar flow, fin skiving machines with simple shearing/skiving tool.
The deformation zone (blue), undeformed chip thickess h0 and rake angle α are shown. The workpiece material undergoes plastic shape transformation to form a chip with final thickness hc. The velocity of bulk material flow against the tool is V0. The force in the direction of V0 is the cutting force.
Depending the rake angle, the tool wedge angle, the material and the speed of skiving, the proportion between thickness ho and thickness hc can be between 1 and 3 on average in fin skiving.
Example: If ho/hc = 2,5 and the skiving thickness ho is 0,9mm, then the fin thickness will be 2,25mm,This means also that you have to skive 250mm to get a fin of 100mm.
Fin Efficiency
A heat sink fin skiving machines receives heat from an electronic device and dissipates it into the surrounding coolant fluid. The heat transferred by a fin to the coolant medium decreases as the distance from the base of the heat sink increases. Using a material that has a higher thermal conductivity and decreasing the aspect ratio of the fins or/and using more fins help to boost the fins' overall efficiency.
