« »

How to Create a Wrapped Spring

November 26th, 2010 by John Pearson

First you create the part that you wish to wrap the spring about. In this case it’s a pipe.

Open a new assembly and insert the pipe into the assembly. Save the assembly, and launch the Create Part In-Place command.

This will launch the following dialog. Select the appropriate template and give the spring part a name and a location.

 Select Create and Edit to enter into the spring part. (Note: in versions older than ST2 you just have to select OK)

Create a sketch on a plane representing the spring position. In other words, select a plane that represents the middle of the spring when wrapped around the pipe.

Create the following sketch.

Note: The outer arc represents the center axis of the spring, and the small 0.500 diameter circle represents the diameter of the spring wire.

Select the sweep command.

Fill in the Sweep Options dialog as shown below, and click OK.

For the Path Step select the outer arc and accept it.

For the Cross Section Step select the 0.500 diameter circle. (Note: you may have to change the Select filter to single, on the command bar.)

As soon as you select the circle you will receive the following error.

This is expected because the circle lies on the same plane as the drive curve. This, if processed, would create a swept surface, not a solid.

 Select the Edit button. On the command bar select the Options button.

On the Sweep Options dialog, change the Twist option from None to Number of turns and enter in the number you want. (Note: you could also use the Turns per length option, if so desired.)

This results in a wrapped spring.


Tags: , , , , , , ,


Leave a Reply