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Metal Removal
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Hartwig, Inc. and Dana Corporation Create a Win-Win Situation for Everyone -

Hartwig, Inc. and Dana Corporation Create a Win-Win Situation for Everyone

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Nearly three months ago Hartwig, Inc. earned several purchase orders from Dana Corporation in Cape Girardeau, MO. This project will machine their Nissan rear end differential cases. This project includes 3 Okuma MA 60 HB’s (large horizontal machining centers) completing the majority of the machining on the carriers. In addition, the cell contains a Kira KPC 30A (small footprint vertical machining center) to do some initial high speed drilling and tapping. A gantry Fanuc 710 ITT robot moves the parts from the Kira to the Okuma Horizontals. From here the parts go, via the same robot, to the Gray Mills/MMS parts washer where they are cleaned and washed off. To prove the accuracy of the cell and guarantee Nissan the accuracy they deserve, a robot moves the parts to a Zeiss Centermax. This particular CMM is made to be on the “shop floor” to scan parts for accuracy and other specifications. This CMM is going to be the first one of its kind in the U.S.  Currently Europe has five of them already installed and running in various plants and Dana Corporation has three others going in to a plant on the East Coast.
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When the part goes to the CMM there will be a laser scanner there to read either a bar code or an identification number. This identification tag will carry a great deal of critical information and supply that data to computers, which will store and keep the specifics on this workpiece. For instance, the accuracy, perpendicularity, the true position of bored areas, the repeatability of the CMM and more, will all be captured information.

Once the CMM has scanned the part, it is ready for the next process. The robot will pick up the part, take it to a bushing press and then to an out bound conveyor. The parts are then ready for shipment to Dana in Columbia, MO. Here is where information gets really critical.

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Remember that each part has its own information and is going to be identified by either bar code or a number? As each carrier is assembled in Columbia, there is going to be another laser scanner reading the part and gathering the information written nearly three weeks prior during the machining process. The operator then reads the information on the display, which tells him which size shim to pact into the differential so the assembly of the carrier will be accurate. The reason we bring all of this up is that Hartwig, Inc. has the knowledge and manpower to solve the series of complex problems associated with this process start to finish. What sold this project is our knowledge of the equipment recommended, our Service team and our Applications expertise. Every piece of machinery that we are providing is state of the art. We are very proud to have this project, and more importantly, we are looking forward to proving our plan to Dana. Our yes-we-can attitude carriers from project to project and from customer to customer. No matter the complexity of your next project, you will receive that same attitude. You deserve it; we are happy to deliver that standard of excellence.

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