Minimum Bend Radius Plastic Sheet

The minimum bend edge dimension l in the figure is the minimum bend edge dimension of one bend edge plus t t is the material thickness and the height h should be selected from commonly used plates such as 0 5 0 8 1 0 1 2 1 5 2 0.

Minimum bend radius plastic sheet.

Unfortunately sheet metal bending is not always going to be the same in every shop. Again the minimum inside bend radius is even larger when bending with the grain. Use this document to choose values that are both manufacturable and meet your needs. Minimum cold forming radius sheet thickness x 100.

As a guideline the material can be radiused to 100 times the thickness. The leg lengths are the part of the flange which is outside of the bend radius. Thick grade 350 and 400 may have a minimum bend radius of 2 5 times the material thickness when transverse bending while longitudinal bending may require a minimum bend radius that s 3 75 times the material thickness. It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii.

The bend allowance is defined as the material you will add to the actual leg lengths of the part in order to develop a flat pattern. For this reason strip heat bending is recommended on all gauges 118. Cold forming is possible. Crca inside bend radius equal to 0 65 times of sheet thickness is also enough.

Since commercial sheet metal bending can be done with less concern for stresses caused during forming operation the radius can be near zero for thin sheet metal. The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications. Cold bending tuffak gp polycarbonate sheets may be cold bent with the minimum radius based upon the sheet thickness. Minimum inside bend radius for sheet metal recommended inside bend radius for sheet metal parts should be equal to material thickness.

Tighter radii may result in crazing or cracking of the coating. In steel between 0 5 and 0 8 in. Line bending or thermoforming a brasion resistant acrylic sheet is not recommended. To calculate the minimum bend radius of curvature multiply the thickness of the sheet to be used by 330.

This radius is applied in all cold bending procedures. Generally this height is not suitable for selecting a higher size. Cold forming plexiglas sheet can be cold formed bent at room temperature in a smooth arc and held to a radius by forcing the material into a curved channel support. Never heat acrylic sheet in a kitchen oven.

But for harder materials e g. The minimum bend radius data shown in these charts is measured to the inside of the bend. The recommended radius of curvature should be a value greater than 180 times the thickness of the sheet for plexiglas g sheet and 300 times the thickness for plexiglas mc sheet see table below.