Transcript Cavity Mill
CAM与自动编程 封志明 [email protected] I、The Basics of UG NX CAM II 、 Planar Milling III 、 Cavity Milling IV、 Fixed-Axis Milling V、Drilling Contour Milling Overview Cavity Milling Overview Create a Cavity Mill operation Create a Cavity Mill operation with an IPW Cavity Milling Geometry Z-LEVEL Milling Mechanical Engineering@XiHua University 1. Contour Milling Overview 1. Contour Milling Overview Mill Fixed Axis Planar Mill Contour Mill Cavity Mill Variable Axis Surface Contour Surface Contour Sequential Mill 1. Contour Milling Overview Comparison between Contour Milling and Planar Milling Similarity Steps of Creating Operation The Tool Axis Vertical to Cutting Plane Path Settings Tool Path Generating and Verifying 1. Contour Milling Overview Comparison between Contour Milling and Planar Milling Difference Contour Milling Tool Axis Vertical to Cutting Plane Milling Geometry Solid, Plane, Surface Cut Depth Planar Milling Vertical to Cutting Plane Parallel to the Floor Boundary Cutting Range Boundary Specify Cut Area Floor 1. Contour Milling Overview Tab. Contour Milling Subtype Subtype Subtype CAVITY_MILL CONTOUR_AREA PLUNGE_MILLING CONTOUR_SURFACE_AREA CORNER_ROUGH STREAMLINE REST_MILLING FLOWCUT_SINGLE ZLEVEL_PROFILE FLOWCUT_SMOOTH ZLEVEL_CORNER SOLID_PROFILE_3D FIXED_CONTOUR PROFILE_3D 2. Cavity Milling Overview Cavity Milling Use Cavity Mill operations to remove large volumes of material in planar levels that are perpendicular to a fixed tool axis. 2. Cavity Milling Overview Suitable Occasion ideal for rough-cutting parts Fixed axis Milling Vertical to Cutting Plane Take advantage of the IPW Part Geometry planar contoured 3. Create a Cavity Mill operation In Cavity Milling, you must first define Part and Blank geometry, then: Sets the top and bottom of the Blank geometry at the highest and lowest level of cutting. Creates one or more planes that are perpendicular to the tool axis, at the defined cut level. Creates intersection curves or traces between the cut level planes and the geometry. Creates a Cut Pattern at each Cut Level. Combines Engage and Retract moves with the different Cut Levels. 3. Create a Cavity Mill operation ① On the Insert toolbar, click Create Operation , or choose Insert→Operation. ② In the Operation Subtype group, click CAVITY_MILL ③ In the Location group, select the following: Program Tool NC_PROGRAM Geometry WORKPIECE Method MILL_ROUGH EM-.75-.03 ④ Click OK, the Cavity Mill dialog box is displayed. ⑤ The geometry is inherited from the WORKPIECE Geometry group. ⑥ Click Generate . 4. Create a Cavity Mill operation with an IPW You can have a series of Cavity Milling operations that take advantage of the In Process Workpiece (IPW). 1 Captures what has been cut or not cut. 2 Provides advanced functionality for tool 3 holder collision checking. Allows you to view the material removed by the current operation. 4. Create a Cavity Mill operation with an IPW ① In the Cavity Mill dialog box, click Cutting Parameters ② In the Cutting Parameters dialog box, click the Containment tab. ③ In the Blank group, from the In Process Workpiece list, select Use Level Based or Use 3D. ④ Set the Path group settings as needed. ⑤ Click Generate 4. Create a Cavity Mill operation with an IPW IPW containment options: Use 3D: creates a facet body to represent the IPW. Use Level Based: creates 2D representations of uncut regions for Cavity Milling and Z-level Milling operations. 5. Cavity Milling Geometry Geometry Part Blank Check Cut Area Trim Boundaries 5. Cavity Milling Geometry For the best results in Cavity Milling, Cut Area Geometry should contain faces that clearly define a volume of material to remove. If the cut area contains only If the cut area contains only horizontal vertical still faces, then no depth of the volume is attempts to define a volume to defined, and the cut levels may be remove, but it may not be what you extended up to the top of the blank. To expect. By selecting more faces, limit the cut depths to the local area, adjusting the extension distance, or either select some non-horizontal faces changing the blank, you should be to represent the depth, or adjust the cut able to get the desired tool path for levels manually. faces, a local area. the system 5. Cavity Milling Geometry 3D In Process Workpiece When you select the Use 3D In Proces Workpiece option, Blank Geometry replaced with Specify Previous IPW is . Click Display to view the operation's blank, which is the 3D IPW available at the start of the current operation. Click (Display Resulting IPW) to display the resultant In Process Workpiece generated by the operation. 6. Z-LEVEL Milling Z-Level Milling Use Z-Level Milling for fixedaxis semi-finishing and finishing. Z-Level Milling maintains a near constant scallop height and chip load on steep walls and can be especially effective for high speed machining. 6. Z-LEVEL Milling With Z-Level Milling, you can do the following: Profile the entire part, or specify Steep Containment so that only areas with a steepness greater than the specified angle are profiled. Cut multiple levels in one operation. Cut multiple features (regions) in one operation. Cut by level (waterline) for thin-walled parts. Maintain the tool in constant contact with the material. The following options let you cut an entire region without lifting the cutter. 6. Z-LEVEL Milling Z-Level Milling has the following advantages for semi-finishing and finishing: Advantages Zlevel does not require blank geometry. Zlevel has steep containment. When cutting depth first, Zlevel orders by shape, where Cavity Milling orders by region. On closed shapes, Zlevel can move from level to level by ramping directly on the part, to create a helical-like path. On open shapes, Zlevel can cut in alternating directions, creating a zig-zag motion down a wall.