This tutorial shows how to make a Backrest using the cross curve tool. This tutorial also demonstrates bending an Closed Curve with a hole - a Scooty Pep Backrest. | ![Image_Small_thumb1 Image_Small_thumb1](http://lh4.ggpht.com/-t7RW-q0AsJs/UwMtsSYPJLI/AAAAAAAAH3A/o5_zok02NQk/Image_Small_thumb1_thumb.jpg?imgmax=800)
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Index of all Solid Edge tutorials on this blog is here.
Disclaimer:
• This tutorial and the steps illustrated herein are by no means claimed to be the best or the only way to create the given design.
• This tutorial is an attempt to introduce and demonstrate the awesome set of tools that Solid Edge has for curve creation and surface manipulation.
Front View Curve Begin by creating a curve in the x-z plane.
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Front View Curve - Normal View When viewed in the sketcher, the curve would look something like as shown in figure. Apply tangent relationship to all connected curves. Here, the dimensions or even the form of the backrest is not important. This tutorial shows you the approach to create the backrest. You may go out into the parking and take actual measurements. | ![clip_image003 clip_image003](http://lh5.ggpht.com/-NNDspSXlbMk/UwMtvZPIM8I/AAAAAAAAH3g/v4hEexve2Ow/clip_image003_thumb.gif?imgmax=800)
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Top View Curve Create another curve (an arc) in the x-y plane. See figure. | ![clip_image004 clip_image004](http://lh5.ggpht.com/-83P9u7GyMn0/UwMtwjp_p-I/AAAAAAAAH3w/3nrEK0uRSNg/clip_image004_thumb.gif?imgmax=800)
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Top View Curve - Normal View The Top view curve may extend beyond the limits of the front view curve drawn earlier. But in no case should the new curve fall short of the extents of the earlier curve. | ![clip_image005 clip_image005](http://lh3.ggpht.com/-EyYbj392Tmc/UwMtx4H88pI/AAAAAAAAH4A/ESbzjKt_q5Y/clip_image005_thumb.gif?imgmax=800)
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Cross Curve Select the Cross Curve command from the Surfacing toolbar as shown. | ![clip_image006 clip_image006](http://lh6.ggpht.com/-bTC72Vm73O4/UwMtzWm9blI/AAAAAAAAH4Q/1gdDoX2aR-o/clip_image006_thumb.gif?imgmax=800)
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First Curve Select the top view curve as the first curve. Click accept on the ribbon bar. | ![clip_image004[1] clip_image004[1]](http://lh5.ggpht.com/-Svxl6z3uTNM/UwMt2DDd_dI/AAAAAAAAH4w/ZlhwqJpk4pU/clip_image004%25255B1%25255D_thumb.gif?imgmax=800)
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Second Curve Select the front view curve as the second curve. Click accept on the ribbon bar. | ![clip_image002[1] clip_image002[1]](http://lh3.ggpht.com/-vSzZ0k899xo/UwMt4frqbKI/AAAAAAAAH5Q/XydGtKG6pao/clip_image002%25255B1%25255D_thumb.gif?imgmax=800)
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Cross Curve Click Finish on the ribbon bar. Soon the cross curve is formed. The cross curve is neither in the top plane nor in the side plane. It travels in 3D space, giving us the desired curve to create the backrest. In other words, the front view curve is effectively bent by the top view curve. | ![clip_image008 clip_image008](http://lh5.ggpht.com/-kG960bHp5aU/UwMt5pdfIoI/AAAAAAAAH5c/vF95S-GNl10/clip_image008_thumb.gif?imgmax=800)
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The Bounded Surface Hide all sketches. Click the Bounded Surface command from the Surfacing toolbar. Select all the edges of the cross curve by dragging a window around it. Click Finish on the ribbon bar. A surface will be formed from the edges. | ![clip_image010 clip_image010](http://lh4.ggpht.com/-RTOv5P7GEgA/UwMt8XzrleI/AAAAAAAAH6A/_RE-f6O5NI0/clip_image010_thumb.gif?imgmax=800)
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Sketch in Parallel Plane Create a sketch in a plane parallel to the y-z plane as shown. | ![clip_image011 clip_image011](http://lh4.ggpht.com/-L4PejHMAC2o/UwMt9fgnxzI/AAAAAAAAH6Q/JeMwFpyHDrQ/clip_image011_thumb.gif?imgmax=800)
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New Sketch Normal View The curve extends outside the right part of the bounded surface. See figure. | ![clip_image012 clip_image012](http://lh6.ggpht.com/-unN-x6ZTjaY/UwMt-9nLN1I/AAAAAAAAH6g/uodSvNWN9oQ/clip_image012_thumb.gif?imgmax=800)
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Project Curve - Curve Step Select the Project Curve tool from the Surfacing toolbar. Select the sketch as the curve to project. Click accept on the ribbon bar. | ![clip_image011[1] clip_image011[1]](http://lh4.ggpht.com/-whX0jBVKSaQ/UwMuChmuE2I/AAAAAAAAH7Q/ehHpxFGWIjs/clip_image011%25255B1%25255D_thumb.gif?imgmax=800)
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Project Curve - Body Step Select the bounded surface as the surface to project on. | ![clip_image014 clip_image014](http://lh5.ggpht.com/-a-AYyVGLaVk/UwMuD7IufhI/AAAAAAAAH7g/5nZDo57rpKY/clip_image014_thumb.gif?imgmax=800)
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Project Curve - Direction Step Point the arrow down towards the surface and click. Click Finish on the ribbon bar. | ![clip_image015 clip_image015](http://lh5.ggpht.com/-uLQufDRrCwM/UwMuFG3hUhI/AAAAAAAAH7w/v1FG1imJF0I/clip_image015_thumb.gif?imgmax=800)
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Project Curve - View It If required, click the Visible and Hidden Edges tool on the Main toolbar to see the projected curve. | ![clip_image017 clip_image017](http://lh6.ggpht.com/-z__kUr1qQpA/UwMuHr6gKNI/AAAAAAAAH8Q/8y5pJH0BMY0/clip_image017_thumb.gif?imgmax=800)
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Trim Surface - Surface Step Select the Trim Surface tool from the Surfacing toolbar. Select the bounded surface as the surface to trim. | ![clip_image014[1] clip_image014[1]](http://lh5.ggpht.com/-eLyByMHR9TU/UwMuKCqd_xI/AAAAAAAAH8w/yjmpctZC5aM/clip_image014%25255B1%25255D_thumb.gif?imgmax=800)
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Trim Surface - Curve Step Select the projected curve as the trimming curve. Click accept on the ribbon bar. | ![clip_image019 clip_image019](http://lh5.ggpht.com/-RVO_kObuA_s/UwMuM9pCLCI/AAAAAAAAH9Q/0Gn5aCO0Vuw/clip_image019_thumb.gif?imgmax=800)
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Trim Surface - Side Step Indicate the arrow pointing downwards as the part to trim off. See figure. | ![clip_image020 clip_image020](http://lh4.ggpht.com/-_9BZvdhStVw/UwMuOdI319I/AAAAAAAAH9g/pfjOKGGE5is/clip_image020_thumb.gif?imgmax=800)
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Surface Trimmed The bounded surface is trimmed as shown in figure. | ![clip_image021 clip_image021](http://lh3.ggpht.com/-qt0NAfT0_BE/UwMuPswNzpI/AAAAAAAAH9w/hWkwQMn_nnY/clip_image021_thumb.gif?imgmax=800)
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