How the PRO E software calculates sheet metal parts

Sheet metal calculations are very convenient in CAD, you can see this steel structure CAD

The Y value of the Wildfire plate metal material is different, and the Wildfire Plate is set to Change the parameter by the environment The parameter name is Initial Bend Y Factor Internally, if you know the Y value of the material, you can change it. This is the table of the seventh chapter of the wildfire edition of the plate gold book by Taiwanese author Huang Shengjie** to everyone, Taiwan's plate gold book has been going to be out of the wildfire version table name material y value k value table1 soft brass. Soft copper table2 hard brass.

Copper. Mild steel. Aluminum table3 hard copper.

Bronze. Cold-rolled steel. Spring steel y value = ( 2) * k value k value = δ t y value is the proportion calculated according to the bending façade relative to the thickness of the material k value is the proportion of the radius in the bending, the distance between the neutral material and the thickness of the sheet metal length trial dl = ( 2 * r + y value * t (material thickness)) (bending angle) 2).

Each unit has its own experience value, and this value is very unstable, different plates will be different, different slots will be different, and the mold will wear differently, but I think the software should have this function to adjust. SolidWork has, but Pro E seems to be more cumbersome.

However, it seems that if the y value can be reversed by the formula, the empirical value is substituted for the formula listed on the second floor to find the y value backwards.

Pro e sheet metal parts directly just fine.

However, the y-factor should be set according to the material, plate thickness, and bending die groove width.

Proe's sheet metal parts are just a physical part poured into the SW, and it needs to be converted with the Sheet Metal in SW command, and it can be converted to SW sheet metal parts before it can be automated.

Proe's sheet metal is calculated according to the default formula or bending table, and the material deformation is accurate, and the material deformation requires finite element software

Absolutely, as long as it conforms to the characteristics of sheet metal: the application "sheet metal parts" selects the driving surface or makes the shell.

Derivation of sheet metal length calculations.

In the Pro E Sheet Metal module, the formula for calculating the length of the bent part is: dl (Pi 2*Ri+Y factor*t)*A 90 where: the neutral layer length of the DL sheet Ri bending inner diameter y factor y-axis scale factor t sheet thickness a The relative center angle of the bent part is the following is the derivation process:

where k is the neutral layer coefficient (i.e., the ratio of the distance from the inner wall to the neutral layer to the plate thickness) dl 2 pi(ri+k*t)*a 360 (pi*ri+pi*k*t)*a 180 pi 2*ri+pi 2*k*t)*a 90 make pi 2*k=y factor dl (pi 2*ri+y factor*t)*a 90 I personally think that the k factor has direct significance for us to calculate the length, so when setting the bending permit, Set the k-factor and you're good to go. The k-value has different values for different materials. The K value of ordinary steel plate is actually taken, and the error is very small.

Calculated on geometric principles.

But it's too much trouble.

Nowadays, most of them use software to automate tasks.

Steel hook: This is the best, you can try it.

Measure the diameter multiplied by 2 and you're good to go

In the past, I used to use sheet metal instructions on SOLIDWORKS directly, and then I forgot how to do it.

Length = in material + in material + compensation amount.

l=a+b+k1.When 0 t, k=02For iron: aAt that time, k= at that time, k= when t, k=

L=a+b+k k value is taken as the arc length of the neutral layer 1When t = When t =

Calculation Principle 1During the bending process of the sheet, the outer layer is subjected to tensile stress and the inner layer is subjected to compressive stress, and there is a transition layer that is neither tensile nor compressive between tension and compression, which is called the neutral layer. The length of the neutral layer during bending remains the same as before bending, so the neutral layer is the benchmark for calculating the length of the bending part. 2.

The position of the neutral layer is related to the degree of deformation, when the bending radius is large and the bending angle is small, the degree of deformation is small, and the position of the neutral layer is close to the center of the sheet thickness. When the bending radius decreases and the bending angle increases, the degree of deformation increases, and the position of the neutral layer gradually moves to the inside of the bending center. The distance from the neutral layer to the inside of the sheet is denoted by .

The sheet metal is stored in DWG format after Pro E and calculated proportionally with CAD.