Due to storage and transport, e.g. from the outside to the inside, tensions can build up in panels due to temperature and humidity differences. These are released when the panel is split and thus lead to a reduction in the cutting quality, dimensional accuracy and angularity of the cut parts.
To counteract this, intelliDivide supports the targeted insertion of stress clearances. Settings for stress clearances can also be made based on material groups created in the materialManager . These release the tensions and the so-called banana effect can be reduced or avoided. The subsequent final cut can then be carried out with high accuracy.
Whether and how many stress clearances are necessary depends heavily on the quality of the panels, the environment and the quality standards. Each tension clearance is associated with an additional loss of material and time. It is important to find the right balance.
Machine parameters for stress-free cuts
In intelliDivide, you make the settings for stress clearances in the settings for the machine parameters.
There are three types available: "Simple tension clearance", "Slit in the middle between strips" and "Bridge in the middle between strips".
To adjust the behavior, you basically have the following parameters available:
Width (including saw blade): Specifies the width of the stress clearance. A tension clearance requires three cuts. Accordingly, the width should be at least three times the width of the saw blade plus a surcharge.
Minimum cutting length (mm): Stresses lead to dimensional accuracy problems, especially during long cuts. As a rule, tension-free cuts are sufficient for strip cutting. The parameter can be used to specify the length of a section from which a stress cut should be inserted. The smaller the value, the more stress relief cuts occur.
Minimum Distance (mm): The parameter can be used to adjust the minimum distance between stress clearances. For example, if a strip is narrower than the value entered, a second stress cut is not inserted. The higher the value, the fewer stress clearances occur.
The parameters are pre-assigned with values often used in practice.
Settings for Inserting Stress Cuts
Cutting Plans with Inserted Stress Clearances (yellow)
Cutting Plans with Inserted Stress Cuts (yellow) in productionAssist Cutting
In addition to the simple tension clearance, the two options "slit in the middle between strips" (1) and "bridge in the middle between stripes" (2) are also available. You will only see these options if they are supported by the machine in question.
Both types make the panel easier to handle, as the saw first sets all the tension clearances and then starts splitting the strips. The panel can still be moved coherently and the handling of the individual strips that occur during continuous stress clearance is no longer necessary.
Stress clearance types: slit centered between strips (1) and web centered between strips (2)
When selecting the type "Slot in the middle between stripes", the distance of the slot from the side can be specified as an additional parameter. The setting is made as a percentage depending on the plate size.
Selecting the "Center Slit Between Stripes" Type
If you select the tension clearance type "Bridge Center Between Strips", you can set the length of the center bar as a percentage of the plate size as an additional parameter.
Selecting the "Bridge Center Between Stripes" type
As an alternative to the setting in the machine parameters, you can also activate the option "Use material-dependent parameters" in intelliDivide.
Using Material-Dependent Parameters for Stress Relief Cuts
Material-Dependent Settings for Stress Clearances
In the materialManager, in the "Optimization" area under the "Stress Sections" tab, you have the option of creating material groups for the use of stress sections. This classification makes it possible to determine whether and which parameters should be applied for stress relief sections, depending on the material properties. Material groups can be formed based on common properties of the materials, such as the material and coating category or the panel manufacturer.
For each material group, it can be specified whether and with which parameters stress clearances are to be used. By selecting the type, you can also choose between the three options "Simple tension clearance", "Slit in the middle between stripes" and "Bridge in the middle between stripes".
For each material group, it can be specified whether and with which parameters stress clearances are to be used.
Selecting the Stress Clearance Type
The usability of the different types of tension clearance depends on the machine selected in intelliDivide for optimization. If a certain type is not supported, intelliDivide falls back to the standard type "Simple Stress Clearance".
In the "Plates" tab in intelliDivide, the respective material group per material is displayed.
In the cutting plans, the inserted stress clearances are marked in yellow.
Representation of the Material Group for Stress Relief Sections in intelliDivide
The stress clearances inserted in the cutting plan are marked in yellow.