Chapter 7 Advanced Sketching and Constraining Techniques Chapter
- Slides: 26
Chapter 7 Advanced Sketching and Constraining Techniques
Chapter 7 - Objectives • After completing this chapter, you will be able to – – – Use construction geometry to help constrain sketches Create and constrain an ellipse Create a 2 D spline Create a pattern of sketch geometry Share a sketch Utilize both the symmetry constraint and mirror tool Slice the graphics window Sketch on another parts face Change the display of dimensions Create relationships between dimensions Create parameters Create a part that is driven from a Microsoft Excel spreadsheet
Construction Geometry • Construction Geometry – Reduce the number of constraints and dimensions that are required to fully constrain a sketch – Example. . • circle inside a hexagon can drive the size of the hexagon – Can be constrained and dimensioned – Not seen in the part – Editing – Line style – Color of the image
Ellipses • Ellipses – Can be trimmed, extended, and dimensioned – Offset • Concentric ellipse • Spline profile • Major or minor axis
2 D Splines • 2 D Splines – Create complex shapes – Free flowing shapes – Points – Edited and Controlled – Spline options
2 D Splines • Spline options – Bowtie • Handle • Curvature • Flat
2 D Splines • Spline options – Fit Method • Smooth • Sweet • Auto. CAD
2 D Splines • Spline options – Insert Point – Close Spline – Display Curvature
2 D Splines • Spline options – Spline Tension – Constrain and Dimension a Spline
Exercise 7 -1 • Complex Sketching
Pattern Sketches • Pattern Sketches – Instead of creating multiple sketches – Rectangular or Polar – Occurrences or Elements – Rectangular & Circular Pattern dialog box • Suppress • Associative • Fitted – Occurrences or Elements
Shared Sketches • Shared Sketches – Copy of the original sketch – Same sketch geometry, dimensions & face – Same name – Update – On limit
Mirror Sketches • Mirror Sketches – Create a symmetrical part – Symmetry constraint • Reduce the number of constraints and dimensions • Changes - updates • Automatically • Manually – same object type – lie on opposite sides of a line
Slice Graphics • Slice Graphics – – Obscuring the view Plane that is difficult to see Temporarily slice away Working in an assembly
Sketch on another Part’s Face • Sketch on another Part’s Face – Sketch • • Can be placed on a face or plane of another part Not limited to first sketch Associated Adaptive
Exercise 7 -2 • Projecting Edges and Sketching On Another Part’s Face
Dimension Display • Dimensional Relationships –Set up relationships between dimensions • Dimension Display –Automatically tagged - label • “d” and a number (d 0, d 27) –Five options (Display as. . ) • Value, Name, Expression • Tolerance • Precise Value –Change dimension display style
Dimension Relationships • Dimension Relationships – Setting relationship between creating and existing dimensions – Edit Dimension dialog box • Dimensions label (d#) • Prefix fx = value based on parameter or other dimension
Dimension Equations • Dimension Equations –Can be used whenever a value is required –Example. . • (d 9/4)*2, or 50 mm + 19 mm • prefixes, precedence, operators, functions, syntax, and units –Help system –Invalid expression • Red
Parameters • Parameters – User-defined name assigned a numeric value, either explicitly or through equations – Multiple parameters • depth = length – width – Anywhere a value is required – Three types • model parameters • user parameters • linked parameters
Parameters • Parameters –Parameters dialog box • Model Parameters – automatically • Reference – driven dimension • User Parameters – manually defined – Column names • • Parameter Name Units Equation Nominal Value Tol Model Value Export Parameters Column Comment
Linked Parameters • Linked Parameters – Multiple values & same parameters – Spreadsheet • Microsoft Excel
Linked Parameters • Linked Parameters – Spreadsheet Embedded • no link – no updates – Spreadsheet Linked • will update • more than one can be linked – Guidelines – Edit
Exercise 7 -3 • Auto Dimension, Relationships and Parameters
Summary To Do This Create construction geometry Change the line style to Construction in the Style area on the standard toolbar. Create splines Click the Spline tool on the 2 D Sketch Panel Bar. Pattern a sketch object Click either the Rectangular Pattern tool or Circular Pattern tool on the 2 D Sketch Panel Bar. Share a sketch Right-click on the sketch name in the Browser and select Share Sketch from the menu. Mirror a sketch Click the Mirror tool on the 2 D Sketch Panel Bar. Temporarily slice away a portion of the model that obscures the plane After making a sketch active, right-click and select Slice Graphics from the menu. Sketch on a plane of another part Click the 2 D Sketch tool on the standard toolbar and click on any planar face or plane of another part. Create parameters Click the Parameters tool on the Sketch, Part Features, or the Assembly Panel Bars.
Applying Your Skills • Skill Exercise 7 -1
- Sketch chapter 7
- Love constraining to obedience
- Freehand sketching techniques
- Advanced counting techniques
- Advanced evasion technique
- Advanced counting techniques
- Advanced interviewing techniques
- Point processing techniques
- Advanced counting
- Advanced data visualization techniques
- Advanced construction techniques
- Fonctions et solutions techniques
- Cross projection method
- Sketching vocabulary
- Crime scene sketching
- Locus-metoden
- Multiview drawing
- Missing lines engineering drawing
- 3 kinds of pictorial drawing
- Dr frost functions
- Sketching graphs of quadratic functions
- Cubic and reciprocal graphs
- Final sketch crime scene
- Sketching graphs calculus
- Crime scene sketch
- Sketching as a tool for numerical linear algebra
- Isometric projection exercise