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Tham khảo tài liệu 'theory and design of cnc systems part 10', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 8.5 Conversational Programming System Design 303 Table 8.5 continued Run-out Approach no Arc Parallel Perpendicular x O x Face R feed factor Feed factor in radius direction. x x O Face Face R allowance Facing allowance in radius direction. x x O Face Face allowance Removal rate in radius direction x x O Face Pock R feed factor Feed factor in radius direction x x O Pocket Boss outer Ffac Feed factor for machining outside of Boss x x O Boss Axial D-Ffac Feed factor for machining in axial direction x x O Boss Pocket Pock R-Fac Feed factor for full slot cutting in the case of pocketing. x x O Pocket Overlap amount for closed shape Overlap amount when approaching and retracting in closed shape x O O 8.5.2.7 Graphic Simulation for Verification Graphic simulation is carried out by a path simulator for verifying tool paths and a solid simulator for verifying the machined shape. A path simulator displays toolpaths as a sequence of lines or arcs and is used for visual verification of the toolpath of a part program see Fig. 8.19a . It provides the functions for checking for collisions between tools and clamps and editing a part program for correcting incorrect tool paths. A solid simulator shows the change of part shape of a 3D solid model during machining. Also by using a solid simulator it is possible to verify tool paths and analyze realistically the machined part see Fig. 8.19b . During the programming sequence the screen displays complete operations. Therefore if a verification result is different from the operator s expectations it is possible to modify the operation and quickly correct the program during simulation. The part shape is also displayed on the screen and regions that cannot be cut due to the tool geometry are checked and displayed. In particular blank material and removal volumes are displayed simultaneously on the screen and whenever a particular operation is specified the volume remaining after completion of the specified operation is displayed. Tool .
