Page 17 - MetalForming-January-2019-issue
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of the DSF series and their ability to increase productivity, improve part quality, extend die life and reduce maintenance, according to company officials.
The technology demonstrated how, via DSF-series accu- racy and programmability, servo near-fineblanking can pro- duce a 90-percent-plus burnished surface with a straight edge, exceeding the typical 70-80-percent burnished edge requirement of many applications, Aida officials also offered. This reportedly allows transition of near-fine-part production from a high-cost, labor-intensive machining process to a more efficient, economical stamping process, thus reducing per-piece cost. And, servo presses with capabilities such as the DSF series offer more pressroom flexibility for other work than fineblanking machines. The 300-ton straightside press, earmarked for Portland Products, Portland, MI, after the show, also included feed equipment from Dallas Indus- tries and lubrication delivery via a system from Pax Products.
In addition to the press lines, other Aida servo technology on display included its exclusive Allen-Bradley based servo- press control for machines in capacities from 315 to 3500 tons. At Aida’s booth, the control demonstrated several servo- press stroke-motion profiles in real-time on a virtual press. Aida-America:
Brake for Servo-Mechanical Presses
To support servo-press innovation, Desch Canada Ltd. highlighted its Servox brake line. Suitable for use in ser- vomechanical presses, or as a static holding brake with emergency-stop function or dynamic safety brake, Servox units offer a low inner-mass moment of inertia and are free of friction corrosion.
The Servox E standard drive comes equipped with a hydraulically released safety brake on the gear input shaft. Standard gearboxes cover a torque range from 10 to 250 kNm, and have servo motors with a torque range from 1.7 to 40 kNm used as the drive. These compact drives offer
press manufac- turers a simple installation option for the entire servo dri- vetrain. What‘s more, a sepa- rate safety brake need not be installed on the opposite end of the eccentric shaft.
The Servox SP drive employs a modified planetary gearbox and enables medium gear ratios in a coaxial arrangement, yet the drive reportedly is only a little bit longer than a stan- dard planetary gearbox with a similar output. These drives can be designed to torque ratings of 150 kNm. A two-stage Servox Z drive is available for even higher ratios and a coaxial
design. Based on the standard Servox E drive, a second plan- etary gear, flange-mounted on the output of the first gear stage, enables maximum torque ratings to 2000 kN.
The Servox DS, offers the greatest flexibility in terms of output torque, gear ratio range and motor variation, accord- ing to company officials. In this case, the output torque is transmitted via planetary gearing. Depending on the geo- metric conditions, between two and four servo motors can produce the drive on the input side. Flexible combination of the gear ratio and the number of motors gives rise to a broad range of applications. Torque ranges from 25 to more than 2000 kNm.
Stated overall Servox benefits include low moments of inertia, which shorten cycle times and increase productivity; and high power density that makes for compact dimensions with high torque ratings, which facilitates installation in new and existing machinery.
Desch Canada Ltd.:
Enhanced Heavy-Duty Servo Feeds
Coe Press Equipment used the FABTECH stage to tout the redesign of its heavy-duty
(HD) servo roll feeds that enable increased speed and preci- sion in han- dling thicker materials while delivering a decreased cost of operation, accord- ing to company officials. The revamped product line, consisting of the company’s 500, 600, 700 and 800 series, is available in nine coil-width capacities, from 18 to 78 in., with the feeds designed to work with or without a power straightener. The HD feeds can process a range of heavy-gauge materials, including advanced steels, and reach speeds to 319 ft./min., or to 409 ft./min. via the company’s Servo-Piloting option that allows accurate, repeatable pilot timing at speeds greater than 10-times faster than air-piloting
The new, robust feeds, based upon a modular design,
provide ease of maintenance and the flexibility to reconfigure machine options should users’ needs change. Design changes on the HD feeds include a 15-percent increase in journal and bearings sizes, enabling the feeds to handle material thicknesses to 0.750 in. In order to optimize feed perform- ance, Coe reduced the air-cylinder diameter across the prod- uct line—minimizing cylinder size reduces the air required to pilot the feeder, helping to achieve faster speeds.
In addition, edge guides have been designed to be more robust and flexible, and a new single-point roll-lift adjustment option helps operators quickly set the optimal roll gap to ensure proper piloting. Both of these features are available
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