
Expanded metal drawing with main term acronym label.
We’d like to list the abbreviations and related explanations of about expanded metal in a form as following.
Abbreviation of Terminology | Explanation |
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SWD (Short Way Dimension) |
The length of short diamond diagonal from one pitch point center to another pitch point center. |
LWD (Long Way Dimension) |
The length of long diamond diagonal from one pitch point center to another pitch point center. |
SWO (Short Way Opening) |
The length of short diamond diagonal. |
LWO (Long Way Opening) |
The length of long diamond diagonal. |
Bond |
The solid intersection of two strands. |
Pitch |
Another term for SWD. |
Strand Width |
he length fed between the upper and lower tooling to produce the mesh. T |
Strand Thickness |
Thickness of the metal that to be expanded.It is also the thickness of the material after flattening. |
Burr |
An edge on the inside of the mesh that may be sharp or serrated in appearance. Caused by improper clearance or worn tooling. |
Whisker |
An edge at the cut off of an expanded sheet or coil that looks like prongs in the shape of the mesh. Caused by a wide clearance, removal is done by wire brush or file at the expand work center. |
Abbreviation of Terminology | Explanation |
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XM |
Raised or standard material in its original form coming off the expand work center. |
FXM |
The result of passing (feeding) the standard material through a cold roll reducing mill to a defined specification that produces a uniform thickness of the entire sheet.The material elongates parallel to the feed direction creating a longer sheet in the feed direction and may reduce the size of the of the sheet opposite of the feed direction.
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Semi-Flat |
The result of passing (feeding) the standard material through a cold roll reducing mill to a defined specification that produces a less than uniform thickness of the entire sheet.The product is not flat by definition but somewhere between standard and flat. |
Touch Pass |
The result of passing (feeding) the standard material through a cold roll reducing mill to slightly knock down the Bond. |
XS |
Shorts, expanded material to be flattened. |
SWM (Short Way Mesh) |
The dimensional (US/Metric) size parallel to the SWO of the sheet or coil. |
LWM (Long Way Mesh) |
The dimensional (US/Metric) size parallel to the SWO of the sheet or coil. |
Crow’s Feet |
This can be result of improper manufacturing and/or incorrect raw material length. These are open bonds that resemble a crow’s foot. |
Abbreviation of Terminology | Explanation |
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M/R (Machine Run) |
Expanded metal mesh or walkway grating as it comes off the expander. |
Random Sheared |
R/S, expanded metal mesh or walkway grating that is sheared or cut to a defined size without specific requirements. Sheet size can be held to tight tolerance. Likely to have open meshes. |
Bond Sheared |
B/S, expanded metal mesh or walkway grating that is sheared or cut to a defined size on the bond or knuckle.Sheet size is dependent on where the bond falls during the M/R process. Produces closed meshes. |
Balance Bond Shear |
BB/S, an older term not much used, expanded metal mesh or walkway grating that is sheared or cut to a defined size along a center line on the bond or knuckle.Sheet size is dependent on where the bond falls during the M/R process. Produces closed uniform meshes.This process can be achieved through a M/R expand. |
Mesh Blank |
The amount of raw material being fed into the expander to make an expanded finished length. |
Blank |
The combined total amount(s) of the mesh blanks being fed into the expander. |
Hold Down |
The amount of raw material not expanded during the expand process.It is important to keep this to a minimum, the dimension varies for each expand work center. |
Drop |
Another term for hold down. |
Trim Cut |
The amount of raw material used to square the raw material prior to the expand process. In a sheet feed operation, this is done at every new sheet.It is required this be kept at four strokes. |
Line Out |
The final process of expand work center set-up that finalizes specifications before the work-order begins. |
Camber |
The greatest deviation of a side–edge, from a straight line. Parallel to the LWD, touching both ends of the sheet.It is natural for expanded materials to have this condition as it comes off the press. |
Out Of Square |
The condition of not having 90 degree angles on the corners of the sheet also measured by placing a straight edge, parallel to the SWM.This is also natural for expanded materials to have this condition as it comes off the press. |
Clearance |
The distance between the upper and lower tooling. It is measured with shims and is varied depending on the expand work center and material being expanded. |
Tooling |
The forming and cutting materials used to produce expanded mesh. Upper tooling does the forming and comes in many shapes and sizes. Lower tooling is a flat surface that acts as a shear. The upper tool passes in front of the lower tool much like scissors to produce mesh. |