Theoretical continuous chip length per minuteįrom tool designation $\alpha$ = 10 degree 'SAS' means 'Side, Angle, Side' ' SAS ' is when we know two sides and the angle between them. While machining steel with a tool of ORS shape following observation were made, Hence if the tool is designated in ASA system the analysis of machining will be difficult. Put in the values we know: a/sin A 7/sin (35°) c/sin (105°) Ignore a/sin A (not useful to us): 7/sin (35°) c/sin (105°) Now we use our algebra skills to rearrange and solve: Swap sides: c/sin (105°) 7/sin (35°) Multiply both sides by sin (105°): c ( 7 / sin (35°) ) × sin (105°) Calculate: c ( 7 / 0.574. therefore basic geometric properties of tool are measured w.r.t. In other words it is the side included between two angles. 3 mutually perpendicular planes, the measurement of angle and indication will be easier.ĭuring machining operation the formation of chip and how behaviour of chip is mainly depends upon major cutting edge of tool. Basically triangles are congruent when they have the same shape and size. The included side means the side between two angles.
The angle specified in ASA system are measured with respect to 3 mutually perpendicular planes.Īs the angles are measured w.r.t. Angle Side Angle Postulate (ASA): If two angles and the included side of. For any of these proofs, you have to have three consecutive angles/sides (ASA has a side that is 'between' two angles or a leg of each angle, and AAS has side that is a leg of only one of the angles. $\alpha$s = Side rake angle $\theta$s = Side relief angleĬe = End cutting edge angle r = Nose radius.ĪSA System : $\alpha$b - $\alpha$s - $\theta$e - $\theta$s - Ce - Cs - r Definition of a Straight Line: An undefined term in geometry, a line is a. There is one proof SSS that does not require angles, but the rest SAS, ASA, AAS, HL (which assumes a right angle) combine both angles and sides. Where, $\alpha$b = Back rake angle $\theta$e = End relief angle
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