Sheet metal bend table example

Note: Resize the window as needed to see the entire table.

;

; Use an ASCII file editor to customize the values to your specific conditions. All bend radius columns must contain values.

;

;-----------------------------------------------------------------------

;

; Notations used in tables:

;

; ';' = remark character

;

; '*' = start of a new table

;

; '/' = special character

; U = units of tolerance; thickness; bend radius; and correction values

; m; cm; mm; micron; in; ft; or yd

; S = sheet thickness

; R = bending radii

; A = opening angle

; T1 = Tolerance (+/-) for sheet thickness S (valid for the whole file)

; T2 = tolerance for equal min and max bending radius R

; The T2 tolerance is used at the minimum and maximum

; bending radii R in the tables. For model bend radii that fall

; between two values existing in the table, the resultant

; correction value X is determined by linear interpolation

; using the appropriate x values in the table.

; T3 = tolerance for equal min and max opening angle A

; The T3 tolerance is used at the minimum and maximum

; opening angles A in the tables. For model opening angles

; that fall between two values existing in the table, the

; resulting correction value X is determined by linear

; interpolation using the appropriate X values in the table.

;

;-----------------------------------------------------------------------

;

; The correction value X is applied as follows:

;

; L = A + B - x

;

; (L = unfolded length in flat pattern)

; (A = length of side A (outside measurement of bending zone))

; (B = length of side B (outside measurement of bending zone))

;

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;

; Angle A expressed in degrees.

;

;-----------------------------------------------------------------------

;

;

;UNITS for tolerance; thickness; bend radius and correction values

/Ucm

;

;TOLERANCES valid for the whole file

;

/T10.000100

/T20.010000

/T30.010000

;

*** TABLE 1

;

;sheet thickness

/S0.050000

;

;

bending radii

       

/R

 

0.500000

1.000000

1.500000

2.000000

;

opening angle

-------------------- correction value x -------------------

/A

0.000000

0.000000

0.000000

0.000000

0.000000

/A

5.000000

0.029508

0.026252

0.024359

0.023024

/A

10.000000

0.059349

0.053004

0.049384

0.046881

/A

15.000000

0.089863

0.080765

0.075755

0.072419

/A

20.000000

0.121398

0.110057

0.104168

0.100510

/A

25.000000

0.154319

0.141429

0.135353

0.132067

/A

30.000000

0.189014

0.175462

0.170086

0.168059

/A

35.000000

0.225899

0.212779

0.209200

0.209526

/A

40.000000

0.265428

0.254063

0.253600

0.257602

/A

45.000000

0.308101

0.300062

0.304289

0.313537

/A

50.000000

0.354475

0.351613

0.362380

0.378726

/A

55.000000

0.405180

0.409660

0.429132

0.454742

/A

60.000000

0.460932

0.475279

0.505980

0.543377