Offset Bending Sheet Metal

Understanding the bend allowance and consequently the bend deduction of a part is a crucial first step to understanding how sheet metal parts are fabricated.

Offset bending sheet metal.

Interchangeable blades forged blades available in 3 and 6 sizes with quick change over. 60 90 and 120 and we will calculate k factor bend allowance and bend deduction for them. There is no particular rule for how much the material should be weakened but as a rule of. The required offset of 0 097 in.

It varies according to material its thickness bend radius and bending method. Here you would subtract the material thickness from the specified offset. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched. Spring tool the bend angle is controlled through the depth of penetration and the size of the die set.

Consider a sheet with a 20 mm thickness and a length of 300 mm as shown in figure 1. Heavy duty components blades and handles are hot drop forged of high carbon steel for strength and durability. Is the a dimension shown in figure 2 and is the depth of the offset tool as measured between the two faces of the die see figure 3. The two basic forms of offset tooling are spring up and horizontal.

1 1 4 throat depth with 1 4 depth graduations. Midwest seamer tong 3 inch offset sheet metal bender with forged blades kush n power comfort grip handle mwt st2 4 5 out of 5 stars 266 32 99 32. 99 1 15 oz 49 90 49 90. The klein toolsoffset hand seamer makes working in confined spaces easy with the compound leverage mechanism and convenient self opening latch.

As this happens you gain a small amount of total length in your part. Basically the k factor offsets the neutral line to provide a flat pattern that reflects reality. 0 059 0 097 in. Offset handle seamer use to bend or form sheet metal and other pliable sheet materials.

Figure 13 shows this principal at work regardless of the angle or dimension. All of these offset dimensions could be easily produced in the same 500 offset tool. We are going to review three bending scenarios with three different bending angles. Penetrate a 500 inch offset die 50 and you can create a 45 bend at a 250 inches.

This type of bend is also commonly referred to as a jog. Steel jaw is notched in 1 4 in. This creates a z shaped profile in the sheet metal. By using it you get the bend allowance which is in essence the length of the curved neutral axis.

Offset tooling allows two v bends to be formed closer together than regular press brake dies would allow.