Feature Based Machining – Feature Processes

Feature Based Machining – Feature Processes

During our last Feature Based Machining blog, we discussed how to utilize Siemens NX’s Feature Recognition function to interrogate a solid body, find features bases on geometry types, and combine similar geometry into geometry groups to be used for manufacturing operations.

This installment of Swoosh’s Feature Based Machining blog will focus on how to create tool paths for the geometry within the groups previously created. We will look at two methods to do this. First, manually creating an operation or series of operations to process the geometry. Second, we will learn another function call “Create Feature Process”. Let us dive in……

Having created feature groups already, as shown below, we can create operations and use these groups as our geometry. This method will reduce the amount of time spent selecting geometry within the operation or manually creating geometry groups. To do this we can simply specify the geometry group that was automatically created from the “Group Features” command (covered in the first installment of this Blog) in our new operation.

The more automated process is to use the “Create Feature Process” functionality. Siemens NX comes with an OOTB (out of the box) Machining Knowledge Library that maps the feature type and creates the operation or operations to fully machine the feature based on this knowledge.

The function Create Feature Process will result in the creation of multiple operations to mill, drill, or turn the part as directed by the Machining Knowledge Library. Once the OOTB operations are created they can, of course, be modified as you would any other operation, depending on personal preference or company standards.

Finally, we have one piece left to the Feature Based Machining Puzzle and that is customizing the operations and strategies that are mapped to the various combinations of geometry, PMI data, material and tooling types. Using the Siemens NX’s – Machining Knowledge Editor, we could customize and create our own Machining Knowledge rules for use throughout all program you will create in the future. Doing so will ensure company standards are easy adhered to as well as dramatically reducing the amount of time spent creating tool paths. In the next issue of this blog we will look at teaching NX how to machine your features!



Post by John Vincent

John has an impressive working background in the machinery industry. His passion for manufacturing has led to his vast knowledge in BOMs, CNC programming, mill/turns, and post processor development. He lends his NX CAM knowledge as a mentor and instructor to many engineers nationwide.

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