Production Machining

JUL 2018

Production Machining - Your access to the precision machining industrial buyer.

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Swiss-type lathe performing the initial turning operation, and then workers manually moving the parts to additional workstations to perform a series of secondary operations such as drilling and tapping. To upgrade this process to both meet existing production requirements and enable expansion into the plumbing products markets, Gosiger recommended switching from turning barstock and performing secondary operations elsewhere, to beginning with a near-net, forged brass blank and performing all operations on a single BTB rotary transfer machine. Each station of the rotary table is dedicated to a specific machining step, thereby eliminating the need for multiple workstations. Moreover, because all operations are performed on one machine without removing the part from its holding collet, the process is more repeatable, thus ensuring highly accurate parts. e rotary transfer machine selected is a BTB TRO8S-13U, a horizontal table axis, eight station, with 13 machining units system. It includes an internal part trans- ferring mechanism with three, two-axis recessing heads, a multi-head interface for producing plumbing drop ear fittings, and a part marking option. e eight rotary table stations include: • one loading and unloading station • seven working stations • seven threading/boring units with a CNC-controlled recir- culating ballscrew and a 130-mm stroke • six threading/boring units with a CNC-controlled recirculating ballscrew and a 130-mm stroke • CNC recessing heads with ballscrew control and 10-mm stroke • 1.5-inch machining capacity is model is specifically designed for standard tees and elbows with various threads, push-to-connect fittings and simple water supply valves. All movements are servo- controlled, and the system uses standard G-code program- ming on a Bosch MTX control (a FANUC control is also available). e automated bulk loading system employs a vision-equipped, six-axis Staubli robot capable of 1,800 pieces-per-hour cycle times. Because Tramec Sloan wants to move into new markets, including water supply brass plumbing fixtures that require no-lead brass, the system is equipped with high-pressure coolant delivery at 1,000 psi to compensate for the increased friction-produced heat and to break up chips for better accuracy and longer tool life. According to Mr. Hessey, using the near-net shape forging with the new system reduces material costs by up to 40 percent, depending on the part. at, alone, is a significant :: The one-step finishing process of the lateral surface and the concave shape of the plane surface is performed using a Mini 114 axial grooving tool. connectors, harnesses and more for commercial vehicles and other industrial applications. Products are manufac- tured in three plants located in Michigan, Ohio and Kansas. In addition to streamlining his current manufacturing process, Mr. Hessey wanted to leverage the new work cell's ability to quickly produce tight tolerance parts to not only compete with offshore and domestic producers, but to also move into previously untapped markets. "You simply can't compete in today's global markets and grow your business by sticking to the old ways," Mr. Hessey explains. "So we're always looking for new technologies and production methods. In this case, I spoke with our raw materials supplier who had seen a BTB rotary transfer machine in another plant and suggested we look into it." Mr. Hessey contacted the manufacturing technology company that sells and supports BTB machines—Dayton, Ohio-based Gosiger High Volume. Gosiger's applications engineer visited Tramec Sloan and observed its produc- tion method, which consisted of a bar feeder equipped :: 43 Rotary Transfer Reduces Manufacturing Steps

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