Difference between revisions of "Helical coil"
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A helical coil has a centerline shape of a helix. A helix (pl: helixes or helices) is a curve that forms a spiral or a coil in space. | A helical coil has a centerline shape of a helix. A helix (pl: helixes or helices) is a curve that forms a spiral or a coil in space. | ||
<br><br> | <br><br> | ||
| + | [[image:coilpitch.jpg|400px|right]] | ||
CNC Bender uses [[push bending]] with a rotational twist in the Rotation axis to create helical tube or pipe coils used in often heat transfer and immersion applications. | CNC Bender uses [[push bending]] with a rotational twist in the Rotation axis to create helical tube or pipe coils used in often heat transfer and immersion applications. | ||
==Coil Pitch== | ==Coil Pitch== | ||
| − | + | ||
| − | The pitch of a helix is the width of one complete helix turn, measured along the helix axis. | + | The '''pitch''' of a helix is the width of one complete helix turn, measured along the helix axis. see the "P" dimension in the image on the right. |
<br><br> | <br><br> | ||
With CNC Bender the '''pitch''' of a tube coil is most affected by the [[coil twist ratio]] in the [[Push Bend Profile Table]]. | With CNC Bender the '''pitch''' of a tube coil is most affected by the [[coil twist ratio]] in the [[Push Bend Profile Table]]. | ||
<br><br> | <br><br> | ||
Increase the ratio value to increase the pitch in a coiled tube. | Increase the ratio value to increase the pitch in a coiled tube. | ||
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| + | <table> | ||
| + | <tr> | ||
| + | <td width="250"> | ||
| + | This is a solid model of a copper tube with a 50 millimeter pitch. | ||
| + | </td> | ||
| + | <td> | ||
| + | [[image:coil_50pitch.jpg|200px]] | ||
| + | </td> | ||
| + | </tr> | ||
| + | |||
| + | <tr> | ||
| + | <td width="250"> | ||
| + | This is a solid model of the same copper tube with a 65 millimeter pitch. | ||
| + | </td> | ||
| + | <td> | ||
| + | [[image:coil_65pitch.jpg|200px]] | ||
| + | </td> | ||
| + | </tr> | ||
| + | |||
| + | </table> | ||
==Coil Radius== | ==Coil Radius== | ||
Latest revision as of 04:44, 2 January 2009
A helical coil has a centerline shape of a helix. A helix (pl: helixes or helices) is a curve that forms a spiral or a coil in space.
CNC Bender uses push bending with a rotational twist in the Rotation axis to create helical tube or pipe coils used in often heat transfer and immersion applications.
Contents |
Coil Pitch
The pitch of a helix is the width of one complete helix turn, measured along the helix axis. see the "P" dimension in the image on the right.
With CNC Bender the pitch of a tube coil is most affected by the coil twist ratio in the Push Bend Profile Table.
Increase the ratio value to increase the pitch in a coiled tube.
|
This is a solid model of a copper tube with a 50 millimeter pitch. |
|
|
This is a solid model of the same copper tube with a 65 millimeter pitch. |
|
Coil Radius
The radius of a helical tube shape is controlled mainly by the bend arm angle during push bending.
Other factors include the distance between the two opposing rollers in the front die and material composition and wall thickness. The largest contributor to the coil radius is the bend arm angle during push bending.
Coiled Tube Sample
This is a sample tube coil that was bent using both draw bending and push bending.
Other Pages
- See CNC Bender
- See Push Bending
- See Push Bending Profile Table
