Tham khảo tài liệu 'process selection - from design to manufacture part 12', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Component costing 259 A Part Envelope is Largely a Solid of Revolution Single Primary Axis Secondary Axes straight line features parallel and or perpendicular to primary axis Complex Forms Basic rotational features only Regular secondary repetitive features Internal Internal and or external features Irregular and or complex forms A1 A2 A3 A4 A5 Category Includes Rotationally symmetrical grooves undercuts steps chamfers tapers and holes along primary axis centre line. Internal external threads knurling and simple contours through flats splines keyways on around the primary axis centre line. Holes th reads counterbores and other internal features not on the primary axis . Projections complex features blind flats splines keyways on secondary axes. Complex contoured surfaces and or series of features which are not represented in previous categories. B Part Envelope is Largely a Rectangular or Cubic Prism Single Axis Plane Multiple Axes Complex Forms Basic features only Regular secondary repetitive features Orthogonal straight line based features Simple curved features on a single plane Irregular and or contoured forms B 1 B2 B 3 B4 B 5 l KB Category Includes Through steps chamfers and grooves channels slots and holes threads on a single axis. Regular through features T-slots and racks plain gear sections etc. Repetitive holes threads counter bores on a single plane. Regular orthogonal straight line based pockets and or projections on one or more axis. Angled holes threads counter bores. Curves on internal and or external surfaces. Complex 3-D contoured surfaces geometries which cannot be assigned to previous categories. c 1 7 Flat Or Thin Wall Section Components Single Axis Secondary Repetitive Regular Features Regular Forms Complex Forms Basic features only Uniform section wall thickness Non-uniform section wall thickness Cup cone and box-type parts Non-uniform and or contoured forms c 1 C2 C3 C4 C5 Category Includes Blanks washers simple bends forms and through .
