GET IT IN GEAR

Opening its doors as a small machine shop in 1954, Bradley-Thompson Tool Company (Southfield, MI) has evolved into a leader of price and quality in the aerospace machining industry. Its 18,000 sq ft facility uses a diverse selection of manual and CNC machines to be a one-stop provider. Aerospace machining of parts and castings has been the company?s emphasis all along, with implementation early on of the ISO-9001 quality system and then, in 2002, the AS-9100 quality system to qualify the company?s strict dedication to superior quality. Both the shop and inspection room are climate controlled, with the inspection room also being humidity controlled.

Markets served have been a renaissance for Bradley-Thompson, who in recent years has refocused their precision machining know-how on the aerospace industry . . . in particular, complex gear box castings. ?We?ve been successful in carving out a niche for ourselves on specific parts like gear boxes, without having multi-million dollar machining centers to do it,? says co-owner Art Watson. ?What we do have is tremendous machining and toolmaking experience born out of many years of designing, building and manufacturing parts and machining systems for the automotive industry. What our global aerospace customers have been impressed with has been our ability to accurately and consistently produce their complex parts on time, at a reasonable cost, with the tolerances and specifications they require. Like many aerospace suppliers, we first became involved by manufacturing service parts . . . which ultimately provided us the opportunity to quote on OE components.?

Jeff Sutter, the other owner of the company, points out, ?Machining know-how notwithstanding, none of this aerospace business would have been possible without having advanced CMM measuring capability to help us develop the best machining process. For many years we used a smaller Starrett Rapid Check CMM to do all our measuring work. But that machine was not sophisticated enough for inspecting multiple bores on gear box housings, nor did it have the ability to guide us in developing the type of interpolation processes that we use to accurately machine the bores.?

Sutter explains further, ?We knew that the size and type of CMM we needed would be pushing the envelope of our capital expenditure budget. Actually, we were thinking we would could only afford a previously-owned machine. We looked for a CMM manufacturer that was close in proximity, because we are a small company and we only have one CMM technician. Our technician, however, is very capable and knowledgeable with DMIS software, so we wanted to make sure that if there was a change in software with a new machine, it would be an easy transition for him.?

Lucky for Bradley-Thompson, Xspect Solutions (Wixom, MI) was located just a short distance away in the Detroit metropolitan area. During a visit, the companies discussed the inspection needs and worked together to be able to provide a brand new X-Orbit 87 Wenzel CMM with both standard and scanning Renishaw probes and OpenDMIS software. This gave Bradley-Thompson a very high quality, all-granite machine with intrinsic precision hemispherical-cylindrical air bearings and volumetric accuracy of 2.5 microns. The working relationship has been excellent and the assistance we were provided in training and even helping us in writing some of the initial programs has been invaluable.?

CMM technician Brian Wehrs says, ?We were under the gun from our newest customer when we originally purchased this Wenzel CMM. We actually took a gear box part over to Xspect and put it on one of their demo scanning CMMs and made graphical outputs of the gear box and the bores so we could write the programs for machining and inspecting them right there on the spot. Since that time, I have completed the OpenDMIS training and love many of the advance features that it has. I particularly like the drop-and-drag capabilities as well as the ability to preview machine movement. Also, the machine came equipped with a styli change rack which is a very nice accessory to have. We added an SPC module to the software package to provide the additional reporting data typically required by our customers.?

The X-Orbit 8.10.7 is an economical CMM that has been designed and built to intrinsic accuracy and to exacting and rugged machine tool standards. It has a measuring range (X-Y-Z axes) of 31.5 in x 39.4 in x 27.6 With a measuring speed of 700 mm/sec and maximum acceleration of 2,000mm/sec2, the system utilizes the industry standard Renishaw PH10 and SP25-1 scanning probing systems and offers volumetric accuracy of 2.5 microns. Headquartered in Wixom, Xspect Solutions, is a wholly owned subsidiary of Wenzel GmbH of Germany.

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Bradley-Thompson Tool Company,
22108 W. Eight Mile Road, Southfield, MI 48034, 248-352-1466, www.bradleythompsontool.com, email Jeff Sutter, [email protected].

Xspect Solutions, Inc., 47000 Liberty Drive, Wixom, MI 48393, 248-295-4300, Fax: 248-295-4301, www.xspect.com, email Jim Krug, [email protected].