ShopSolutions Key requirements for medical part manufacturing at
Brunk, of course, are precision and repeatability. To maxi- mize control of the stamping process, the shop builds its own stamping tooling. It produces many of the stamping
“With the larger machines, we achieve 3.0 µin. Ra standard and 2.0 µin Ra
as a or better with the Vertex. We want
fine finishes because punches with smooth finishes run higher quantities of parts with less required maintenance,” Eisel said. The smaller Vertex machine with 11.81 × 7.87 × 3.14" (300 × 200 × 80-mm) workpiece capacity uses 0.003" (0.076-mm) and 0.004" (0.100-mm)-diameter wire to pro- duce precise features on smaller parts. While the shop’s larger machines generally cut with wires in the range of 0.008" (0.2- mm) diameter, wire as thick as 0.013" (0.33-mm) diameter may be used depending on part thickness.
To maximize control of the stamping process, Brunk Indus- tries builds its own stamping tooling, producing many of the stamping punches, dies, and other parts on electrical discharge machines (EDMs) from GF AgieCharmilles.
punches, dies, and other parts on electrical discharge machines (EDMs) and high-speed milling machines from GF AgieCharmilles (Lincolnshire, IL). The shop’s equipment includes a Vertex F fine-wire unit, Progress series machines for larger parts, and a Hyperspark die-sinking EDM for 3D machining. According to Eisel, 50– 60% of the company’s tooling is machined with wire and/or sinker EDM, and achieving fine finishes is paramount.
Frequent application of exotic materials is another charac- teristic of Brunk’s medical part manufacturing operations. The shop’s primary workpiece material for medical component stampings is stainless steel, including special implantable stainless alloys. Titanium is the second most widely used material, but medical applications regularly involve less- common alloys such as “niobium, platinum iridium, gold, tantalum—materials you have to reference an element chart to see,” Eisel said, adding that those alloys are mostly utilized in implantable components.
Adopting stamping as the process of choice depends on what volumes of parts are to be produced. Cost-efficient, high-volume production is a major advantage of the stamp- ing process, as the size of some of Brunk’s production runs demonstrates. A few jobs run as high as 42-million parts a month for a single customer, Eisel said, while others might only require a few thousand parts monthly.
Thousands of enclosures Hundreds of options Designed and delivered in 10 days
ENCLOSURES ENCLOSURES POWER DISTRIBUTION POWER DISTRIBUTION
Thousands of enclosures Hundreds of options Designed and delivered in 10 days
CLIMATE CONTROL CLIMATE CONTRO
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