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Threaded Holes
Just wanted to post some comments about threaded holes in Fusion and their impact on Fusion CAM.
The way I see threaded holes being modeled is the hole is created and then threads are applied. A thread depth can be specified, however the entire cylinder is treated as one hole.
In SW/HSMWorks you can have the holes modeled as a counter drilled hole. This provides you with 2 different cylinders to select from. You can select the lower drill hole segment and use merge segments to drill. You can then select the upper poriton which is the tap size and this can control the tap or thread mill depth. If you need to tap deeper you can use the through bottom and specify an amout to tap deeper to account for the lead of the tap. If you edit the operation it is easy to see the dimension in the through depth to know how much you are over tapping but.
The second issue is for one there are no NPT threaded hole. I have seen this in the idea station so I am sure it has already bee brought up. However I looked at the pipe threads that are available and the all appear to just model a straight hole and not tappered. Again in the SW/HSMWorks program you can model the NPT threads as a counterbore that has the proper taper and diameters of the NPT major diameter. This allows you to thread mill the NPT thread with a single point thread mill or a multi-tooth. When tread milling a tappered thread the tool needs to start at the bottom and increase the diameter as it moves up the hole.
Is there a work around in Fusion for NPT threads? Anyone milling NPT threads in Fusion?
Fusion