ÖMER TAYLAN BOYA 030070099 9th WEEK

Defining a Circle (in APT codes) ( 10:20 am 09.04.2011)

Circle is a common geometric element. Some statements defined a circle are:

C1= CIRCLE/CENTER, P1, RADIUS, 10
(circle with center point P1 and radius point 10 mm)

C2= CIRCLE/CENTER, P1, TANTO, L1
(circle with center at P1 and tangent to L1)

C3= CIRCLE/ P1, P2, P3
(circle passing through points P1, P2, P3)

C4= CIRCLE/XSMALL, L1, YSMALL, L2, RADIUS, 5
(circle passing through the intersection of lines L1 and L2 and radius of 5 mm( with X small L1 and Y small L2))

( B. S. Pabla,M. Adithan, CNC Machines, page 87)

Defining a Point (in APT codes) ( 10:29 am 09.04.2011)

P1 = POINT/X, Y, Z
(point with coordinates X, Y, Z)

P2 = POINT/CENTER, C1
(point at center of the circle 1)

P3 = POINT/INTOF, L1, L2
(point at intersection of lines L1 and L2)

P4 = POINT/XLARGE, INTOF, L1, C1
(point at intersection of line L1 and circle C1, where X coordinates has higher value)

P5 = POINT/YSMALL, INTOF, C1, C2
((point at intersection of circles C1 and C2, but with small value of Y coordinate)

Here it has been assumed that lines and circles have already been defined in the geometry statements.

( B. S. Pabla,M. Adithan, CNC Machines, page 86)

Defining a Plane (in APT codes) (10:33 am 09.04.2011)

A plane named PL1 can be defined between three points P1, P2, P3 by the statement;

PL1 = PLANE/P1, P2, P3

or through the point P1 and parallel to another plane PL2 by that statement;

PL1 = PLANE/P1, PAREL, PL2

( Alavudeen, Venkateshwaran, Computer Integrated Manufacturing, page 199)

Dealloying (12:32pm 09.04.2011)

Dealloying, also referred to as selective leaching or parting corrosion, is a corrosion process in which the more active metal is selectively removed from an alloy, leaving behind a porous weak deposit of the more noble metal. Specific categories of dealloying often carry the name of the dissolved element. For example, the preferential leaching of zinc from brass is called dezincification, if aluminium is removed, the process is called dealuminification, and so forth.
In the dealloying process, typically one of two mechanisms occurs: alloy dissolution and replating of the cathodic or selective dissolution of an anodic alloy constituent. In either case, the metal is left spongy and porous and loses much of its strength, hardness and ductility.

(Joseph R. Davis, Corrosion: Understanding the Basics, page 158)