Adds thick 5mm, with WCUT way rough machining top and concave cavity. The mechanical coordinates see Figure 2 to show, the Z axis vertical is upward, sits the punctuation is the work piece zero point. The processing scope for on top biggest outline, the part processes the way to see Figure 2 to show. This time pentahedron processing center B, C axis angle for B=0°, C=0°, this time similar ordinary processing center 铣削 way.

Chart 3 shows the mechanical coordinates, apply the SRFPKT processing way parallel 铣削 side. This time B, the C axis angle for B=90°, C=270°, when 铣削 two hands over the surface the R transition surface, pays attention along, 逆铣 the way, avoids cutting. Other surface are similar. The coordinates revolve are divided two steps: The first step for establishes the UCS coordinate system, clicks on Cimatron the right menu auxiliary menu UCS, clicks on CREATE in its sub- menu, after establishes the new UCS coordinates name, then enters establishes UCS several ways, chooses ORIGN+ROT in here, then selects the reference coordinate system namely the coordinate system which revolves, assigns to revolve the zero point, when inquires about whether revolves time, after chooses YES to select UCS to assign the rotation axis and the determination angle, namely establishes the new UCS coordinate system; The second step is the processing mechanical coordinate system which the establishment and UCS corresponds. The concrete method for will click on in UCS sub- menu ACTIVE, designated UCS defines as the current UCS coordinate system, chooses DISPLAY in the UCS sub- menu, will select the UCS coordinates demonstration on the current screen, after will enter the NC system, when will inquire about CREATING A MACSYS, will select YES, then establishment and current UCS corresponding processing mechanical coordinate system MACSYS.

Third, this article is worth emphasizing processes the front part R method, when as a result of cutting tool length limit, cutting tool vertical 铣削 invalid, may carry on by the certain angle 铣削, simultaneously when on R also has other characteristics, direct selection processing scope more troublesome, and is easy to create the cutting tool the advance, appears the cutting tool and the work piece collision phenomenon, for this, needs to establish an assistance plane of reference, see Figure 4 to show, is going to add the ministry of public works particularly outline vertical projection to the auxiliary plane in.

When with SRFPKT way processing, the choice projection processes in the auxiliary plane contour line as the processing scope, quite is ideal. The processing way see Figure 4. When official processing, pentahedron processing center B, does the C axis angle respectively be B=45°, C=0°, how select the cutting tool and the processing parameter does not discuss in the scope in this article.

Certainly, after the processing way passes through postpositioned processing, still had to carry on the examination to the procedure, caused it to conform to the engine bed performance requirement, prevented in the onset and retreat knife, traded in the knife process to appear the interference, by above was worthy of looking at, used Cimatron 11.0 CAD/CAM the coordinate transformation function and the nimble processing method, might completely solve the problem, enabled the pentahedron processing center the performance fully to display.