Products produced at DuPage Machine Products, Inc., Bloomingdale, IL range from hydraulic check valves and automotive fuel injectors to cartridge valves for truck brake systems and compressor components, plus stainless steel medical parts and various brass fittings. Turning, grinding, honing and heat treating are also done at this facility. And DuPage operates its own tooling department, which uses EDM technology. The materials run here include low-carbon steel, stainless, brass, aluminum, and some proprietary customer alloys.
Keeping Up with Technology
Among the “latest technology” additions to the machinery on the floor are several Index six-spindle turning centers, accommodating 32 and 52 mm bar stock. With these machines, DuPage is able to achieve a more finished part in less time, with less changeover and setup time, according to applications engineer Doug Halenza.
“Typically, we were out there competing for the same large-quantity jobs as many other shops. With these machines and their faster setup times, we can actually run smaller quantities and still be very productive,” says Halenza.
According to Halenza, a key component of this fast-paced production turnover on the Index turning centers is the Siemens Sinumerik 840D CNC (shown left), due to its ability to quickly convert the design program into live machining. The Index machines also have Siemens drive systems onboard.
Each job at DuPage Machine begins with a print from the customer. Using Partmaker CAD/CAM software, the programs are developed, run through post-processing, and fed through a DNC system directly to the CNC on the Index machines. Halenza estimates the Index machines outperform the company’s conventional lathe technology by a factor of 4x to 6x, conservatively.
“Another advantage of the machines is that the CNC is a Windows-based environment, which means we can literally cut and paste to create our subs and cycles and keep everything in a packaged file very easily,” says Halenza. “All the geometry offsets and tooling assignments are accessible in each program, plus the CNC operates the automatic bar feeders.”
A Wise Investment
The company also uses (Artist tool) ARTIS monitoring as part of its overall tool management system, as well as robotic articulation on several of the Index machining centers. The CNC controls all the operations and maintains the data for each program run on the machine. Halenza notes that, although Index provided training on the machines, Siemens also provided direct support to DuPage Machine for the CNCs.
For Dave Knuepfer, Sr., president of DuPage Machine, the investment in the Index multi-spindle turning centers was a wise one.
“When all the operations, including cross-drill and offset mill, can be accomplished on a single machine, there are clearly advantages in terms of the overall product consistency and quality,” he says. “Short runs can be costly, if there is waste before production achieves the spec. With the Index machines and Siemens controls, we get there very quickly, which helps us remain quite competitive.”
DuPage Machine also operates a number of other machine tools at this facility, including rotary transfer, Swiss-type turning, single-spindle, bore sizing, honing, CNC centerless grinding, and hydraulic assembly equipment, as well as a fully controlled environment quality inspection department run in SPC protocol with Gage Talker software, plus an EDM tooling shop and heat treating operation.
“The CNC can be a powerful tool, if you know how to use it properly. With all the spindles and all the tooling involved on each machine, it’s simply a situation where you can get tremendous productivity, but it needs to be properly set up, then properly executed,” says Knuepfer. “Our automotive and other critical tolerance business demand that we adhere to strict protocols and the Index machines and Siemens controls can give us exactly that. When you combine such productivity with reliable performance, you get your money’s worth, every time.”
Keeping Work In-House
In a 125,000 sq ft facility with approximately 175 employees, Knuepfer remains committed to finding the best ways to accomplish more, every day. In an era of outsourcing, DuPage does more in-house nowadays and plans to remain in that mode, according to Knuepfer, the grandson of the man who founded the company in 1923.
“We utilize the latest technologies to remain more competitive and bring more value to our customers. The machines can do more, so we can achieve that goal. And we never stop seeking newer, better ways,” he says.