Tài liệu PUMP HOUSING CREATED USING SURFACE Pro/ENGINEER doc

ME-430 INTRODUCTION TO COMPUTER AIDED DESIGN PUMP HOUSING CREATED USING SURFACE Pro/ENGINEER Wildfire 2.0 Dr Herli Surjanhata Create a part called pump_housing Delete the default coordinate system Right-click on PRT_CSYS_DEF, and select Delete Create a coordinate system using 3Planes method by selecting icon, make sure you hold down Ctrl key while selecting the three default datum plane Select the Orientation tab, make sure that coordinate system CS0 as shown in the figure below The X-Y plane of CS0 is aligned with RIGHT Create the following datum curve Click - Insert a datum curve icon, then select From Equation -> Done Select the CS0 coordinate system Cylindrical – as the type of coordinate system Editor window appears, and enter the following equation – see figure below: r = + 2.25*t theta = -105 – 345*t z=0 Save and Exit the editor Click OK to end the datum curve creation Datum curve created using Equation *What is a surface quilt? A surface quilt is a "patchwork" of connected surfaces A quilt may contain one or more surface patches The external edges of a surface are yellow, and the internal boundaries of the patches are displayed in magenta *What is a merge? A surface merge allows multiple surfaces to be combined into a single quilt Surface merges are created by selecting Feature, Create, Surface, Merge, and then selecting the two quilts to be combined through Intersect or Join Completion of the merge operation will be visually evident by turning the yellow edges to magenta Create the surface by sweeping the arc section Select Insert pull-down menu, then Sweep -> Surface Select Traj Pick the datum curve Ok Done -> Okay Open Ends -> Done Sketch the following arc: Click , then select button - to end the creation The resulted surface is shown below *What is the difference between the Capped Ends and Open Ends options available when creating surfaces? Surface features created with Extrude, Revolve, Blend, or Sweep can be open or closed volumes If the surface is going to be open, select Open Ends from the ATTRIBUTES menu If the feature is required to enclose a volume, select Capped Ends A tube can be created by extruding a circular section as Open Ends A closed cylinder would be created by extruding the same section as Capped Ends Create the new surface for housing outlet Select the Datum Plane tool Pick this edge for reference for datum plane creation Click OK Datum plane DTM1 is created Select the Extrude tool Pick the Extrude as Surface Pick -> Pick the datum plane DTM1, and for Sketch Orientation, pick the RIGHT datum plane Click the Sketch button Pick the right outer arc as reference Sketch the circle as shown in following figure Click , then Enter Depth: Click icon to finish the surface creation The resulted surfaces are shown below Merge both surfaces *What is the difference between the Join and No Join options available when creating swept surfaces? Surface features created with Sweep, Var Sec Swp, or Swept Blend, by selecting edges of a surface as a trajectory, will have the option to be merged with the existing quilt If Join is selected from the SRFS JOIN menu, the feature will be automatically combined into one quilt with the original surface This functionality saves the step of creating a new feature with Merge No Join simply means that the feature is not to be merged with the quilt referenced for the trajectory *What is the difference between Intersect and Join, from the SURF MERGE menu? Intersect and Join are the two methods which combine surfaces into one quilt Selecting Intersect from the SURF MERGE menu will merge two intersecting quilts This should be used when quilts overlap one another Pro/ENGINEER will prompt the user to choose which portion of the selected quilts are to remain in the final merge feature Join will merge two adjacent quilts into one A single-sided edge of one of the quilts must lie on the other surface If a portion of one surface extends beyond the boundaries of the other surface, Pro/ENGINEER will prompt the user to select a portion of that surface to keep for the final merge feature *What would cause a surface merge to not be created? Pro/ENGINEER will be unable to create a surface merge if the selected quilts not actually intersect Verify that the surfaces intersect by creating a datum curve by Intr Surfs If the datum curve cannot be created, or is discontinuous, the surfaces 10 Merge the surface again with intersect Pick the two surfaces to be merged as shown in the Model tree, then select the Merge Tool Click the Change side icon , then hold down the CTRL key, pick the other icon The resulted surface is shown below 14 Select on Round Tool to create a 0.125” radius round at the intersection of the surface Click the to complete the task 0.125” radius round *What may prevent a solid use quilt feature from being created? Features being created with the Use Quilt and Solid options from the SOLID OPTS menu, must reference a quilt that completely encloses a volume to be added or removed Any gaps, represented by yellow edges, can hinder feature creation Surfaces that have been successfully joined have magenta edges at their borders Any patches that are not continuous need to be joined with the Merge command *What may prevent a thin use quilt feature from being created? Features being created with the Use Quilt and Thin options, from the SOLID OPTS menu, offset a selected quilt a user-defined distance and fill in that gap with solid material The offset distance and curvature of the selected quilt are the factors which determine creation Ensure that the chosen quilt can be offset to at least the thickness value This can be verified by creating a surface through Feature, Create, Surface, New, Offset, and entering the thickness It can also be investigated through the INFO menu by selecting Analysis, Srf Analysis, Radius, and selecting the surface The info tool will find the minimum radius of the quilt, which should equal the maximum offset distance in the indicated direction Use the existing surface to create a solid object – pump housing, and the following commands will be used: 15 To create a thin solid from a surface quilt, Select the surface quilt first from Model Tree, then Edit -> Thicken Enter thickness 125 Click the flip the direction Click the to button to continue Create the following THIN 360-degree revolved protrusion, with 0.125” thickness Select on the Revolve Tool click -> , then Use FRONT as Sketching Plane, and accept default for Sketch Orientation 16 Make sure to select the icon, and the to change the direction of thickening 17 Create another 360-degree thin revolved protrusion 18 Create the outlet flange with 0.375” thickness as shown in the figure below 19 20 Create the inlet flange shown below to Select on Datum Plane Tool create a new datum plane that passes through the center axis of the housing and angled -30 deg from FRONT datum plane Datum plane DTM2 is created 21 Create a 300° revolved protrusion by using DTM2 as sketching plane, and pick RIGHT datum plane as Top reference for Sketch Orientation Revolved angle = 300° The inside edge of this section is aligned with the edge of the hole 22 and Select on the Hole Tool create the hole as shown below 23 Pattern the hole as indicated below Pattern increment = 30° Total number of holes = 10 24 Create the hole and pattern it as shown below Pattern increment = 30° Total number of holes = 10 and Select on the Hole Tool create the hole as shown below 25 26 27 Don’t forget to add the necessary rounds – use any appropriate radius, for example 0.2” radius or else 28 ... Datum curve created using Equation *What is a surface quilt? A surface quilt is a "patchwork" of connected surfaces A quilt may contain one or more surface patches The external edges of a surface. .. in magenta *What is a merge? A surface merge allows multiple surfaces to be combined into a single quilt Surface merges are created by selecting Feature, Create, Surface, Merge, and then selecting... finish the surface creation The resulted surfaces are shown below Merge both surfaces *What is the difference between the Join and No Join options available when creating swept surfaces? Surface