Minimum Bend Radius Plastic Sheet

The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications.

Minimum bend radius plastic sheet.

Use this document to choose values that are both manufacturable and meet your needs. To calculate the minimum bend radius of curvature multiply the thickness of the sheet to be used by 330. 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. The minimum bend radius data shown in these charts is measured to the inside of the bend.

Bend radii minimum bend sizes. Crca inside bend radius equal to 0 65 times of sheet thickness is also enough. Minimum inside bend radius for sheet metal recommended inside bend radius for sheet metal parts should be equal to material thickness. But for harder materials e g.

It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii. As a guideline the material can be radiused to 100 times the thickness. Line bending or thermoforming a brasion resistant acrylic sheet is not recommended. The leg lengths are the part of the flange which is outside of the bend radius.

Minimum cold forming radius sheet thickness x 100. 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. Generally this height is not suitable for selecting a higher size. 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.

In steel between 0 5 and 0 8 in. Again the minimum inside bend radius is even larger when bending with the grain. This gives the minimum radius that should be attained if the final form is to remain in place. This radius is applied in all cold bending procedures.

Never heat acrylic sheet in a kitchen oven. Tighter radii may result in crazing or cracking of the coating. 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. 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.

Unfortunately sheet metal bending is not always going to be the same in every shop. For this reason strip heat bending is recommended on all gauges 118. It is given by multiplying the thickness of the sheet by 100 i e.