spaceclaim e lamiera

[PiegatoreSolidworks]

Hello, I would have 2 questions intriguing me. .
-how are the folds treated in a particular that more folds with different matrices, i.e. different bend rays and different k factors between them?
- How do you get together? do you couple the details with the command move or with the constraints (tangent, true,....)?

thanks in advance.

 

[Roberto31289]

Good morning,

spaceclaim calculates the k factor in this way:
allowances (fold tolerances)blindfold allowance calculations use what is known as k-factor (fattore k). this is the relationship between the place of the neutral line (t in the image below) and material thickness (t). when the metal is curved, the material is put into a compression state within the internal radius while it is put into tension in the outer radius. neutral line is the zero voltage point where the material passes from compression to voltage.

fattore k = t/tfactor k is a geometric calculation and does not consider physical factors for a given bending process (material type, type of operation fold, tools, etc.). because of this, the only way to know the real k factor for a certain setting is to make the reverse calculation by a real fold. in other words, fold the metal, measure the result, and calculate the factor k.



spaceclaim determines the curve with correct k factor in order to have a more precise result, without changing the k factor or changing the fold tables frequently. The default bending tolerance produces a precise result for normal curves made with normal tools and a normal bending press. for basic parts, you should use predefined tolerances. for special cases, you can use a fold tolerance table.

the curve for the default values used in spaceclaim is shown below.

the chart shows three segments: red, blue and green.

• the red segment represents the bending rays lower than the thickness of the material. due to the physical limit of steel compressibility, it is difficult to obtain folds with a radius below the thickness in an air fold process.
• the blue segment shows that, when the internal radius increases, the factor k not constant. increases up to approximately 0.5 when the internal radius is about four times the thickness of the material. does not increase further because the material is no longer live. a factor k greater than 0.5 is not possible.
• the green segment is constant to 0.5, which is the neutral axis for the folds with a radius greater than four times the thickness.

the point where the red and blue segments meet is important. represents a fold radius equal to the thickness of the material. for normal folds, a reverse calculation finds the value of factor k:
k = (4-pi) /pi = 0,27324this can be confirmed by the manufacturers of bending presses. is correct for normal folds because it is based on the real physical result.



you can build fold tolerance tables for your materials and processes. when your tables are filled (which is an unrepeatable task), you can explain with tables, or use the default value.

with a sheet design selected at the top of the tree structure, the optionk-factor type (tipo fattore k)is displayed in the group metal sheet (lamier)del pannello properties (properties). by default, the k factor type is set to Home, but it is also possible to set a constant k factor.

the option k-factor type (tipo fattore k costante) allows you to insert a numerical value for the part. using this option, you can associate the design with conventional cad functionality, or, adjust the design according to the unique manufacturer standards or tolerance levels to achieve various explaining results.

it is also possible to create a folding table in the csv format

greetings

 

[Robert Tutu]

to make an axieme you have to give all the constraints of tangency, coincidence and so on....you have to be careful that the plans combine, if you cannot with the plans helped even with the axes.