Creep Feed Form Grinding for Metal Parts
Creep feed grinding, also known as form grinding, is a highly specialized grinding process. Creepfeed grinding involves the forming of parts using a porous, high precision wheel to cut workpieces at aggressive depths (relative to other grinding processes), even up to full depth, to create large cutouts, stepped features, fins, or other special features that run straight through the part.
Advanced Technology for High Precision Grinding & Processing
In many ways, creep feed grinding is closer to milling or machining than it is to traditional grinding methods. It uses a special, highly porous cutting wheel to create larger cuts or 2D forms in the workpiece. The wheel may have a standard or specialized cross-section, depending on the cutting/grinding requirements.
Powerful water jets located just behind the cutting wheel spray coolant through the wheel and workpiece at roughly 100 gallons per minute to flush away chips and debris and cool the work zone. This results in better, more precise cuts that are completed in the first pass, and eliminates warping, distortion, thermal stresses, and heat affected zones in finished parts.
To maintain high precision throughout the grinding process, the porous cutting wheel is continually reshaped to its original profile by an adjacent dressing roll. This roll re-forms the wheel by fracturing the grains and creating a very sharp cutting surface. CNC controls adjust the position of the wheel and the roll as the wheel wears away, keeping it properly aligned with the workpiece for perfect cutting/grinding accuracy.
The Form Grinding Experts
Petersen Precision’s form grinding expertise enables us to maintain tolerances of ±0.0002” over long cutting areas, giving our customers closer to near-net parts that require less additional machining and processing.
We also use creep feed grinding as a more economic method of creating finish features and hog-outs that would otherwise be produced via CNC machining or other expensive processes.
Our creepfeed grinding technology allows for continuous operation for faster turnarounds. Finished parts can be unloaded and raw materials loaded in while the machine processes another batch of parts.
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