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Topsolid CAM online Help Index
Chain sweeping
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Menu: Milling | 3D operation | Chain sweeping
Links:
Creating the machining tool path by ‘sweeping’ the whole of or part of a face (or a set of adjacent faces).
Machining can be limited by parametric values and/or other adjacent faces.
The SWEEP mode machining can be applied either on a face or on a set of faces tangential to one another.
This type of machining must necessarily be performed by following the selected faces’ iso parametric curves. Therefore, there are only 2 machining directions possible ::
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For this machining mode, contact point between the tool and the swept face follows the face’s iso parametric curves during machining.
TopSolid'Cam allows the chaining of several adjacent faces, provided the continuity of their iso parametric curves is ensured, taking the tolerance into account (see the ‘merging’ cursor). In such a case, the faces to be chained must be tangential to one another. If such is not the case, linking moves between adjacent faces might cause damage to the part to be created.
There are various factors that can damage the part : curvature radii that are too small, adjacent faces found too close to the face to be swept, surface loop and tool diameter that is too large. Within TopSolid'Cam, it is possible to control and manage possible collisions between the face currently being machined and the adjacent faces. However, to reduce calculation times, this function is not automatically programmed and must be called by the operator.
The very nature of the iso parametric machining mode also allows the user to limit machining operations, by reducing U and V parameters for the start and end of operations.
Since a surface is defined between parameters 0 and 1 in U and 0 and 1 in V, it is possible to specify boundaries for the machining operation in both directions, by specifying 0.25, 0.85, etc as parametric values.
Please note that a face corresponds
to the visual representation of a restricted surface (the original surface
is sometimes called ‘bearing surface’). During machining on this face,
the parametric limits are applied on the bearing surface and not on the
face. These limits can, therefore, not be part of the face and thus, will
not be taken into account.
Select the "Milling
/ 3D operation / Chain sweeping" or click on icon.
If there are several parts, indicate the part to machine..
Specify the face on which machining must be performed. By default, TopSolid'Cam only machines one face.
Select the tool (or change tool) which can be used for the machining operation.
A mauve arrow shows the sweep machining’s favored direction. Half a green arrow shows pass engagement. Arrows’ direction can be modified via the different parameters’ entry dialogue box.
Specify the different parameters in the tab dialogue box which appears. The operator must use this dialogue box to select the other faces to be swept.
Enter the comment which appears on the machine block listing meant for the NC operator. This comment will also appear when the user wishes to take a look at or modify an operation, using the Operation/ Operations manager function.
Eventually, enter a codified remark which will be interpreted by the post-processor, in a specific manner predefined by the user and the post-processor redactor.
Validate entries made into the dialogue box by clicking on OK.
Links:
Click the various zones of the image below
to have help
Topsolid CAM online Help Index
