STAMA America

Give your old STAMA a new outlook - STAMA RetroFIT.

2010-03-08T06:44:00.000-08:00

STAMA Unveils New Concept in Multi-Spindle Machining

2010-03-04T13:25:00.000-08:00

"The '2 Plus 4' principle has represented the most economical and
efficient means of multi-spindle machining in manufacturing," said a
STAMA spokesperson. "STAMA has implemented this principle, with
two spindles and four clamped workpieces, in hundreds of existing
projects worldwide, resulting in reduced cost per part scenarios for its
customers. In today's highly competitive market, however, STAMA has
recently conducted discussions with its customers concerning greater
factory floor utilization and 'non-productive' capacity, leading to the
question: are more than two spindles-perhaps even four-for the
simultaneous machining of workpieces, economically more
reasonable? This challenge has sparked an interesting development
at STAMA, the 4-spindle TWIN2 concept that is now being introduced
to the world market for multi-spindle machining applications.
"In answering this two vs. four question, a shop must first verify which productivity upsides will be realized by this
concept. Contrary to 'logical' expectations, the 4-spindle solution with four clamped workpieces doesn't result in double
the output, compared to a 2-spindle production with four clamped workpieces. In the relationship between the primary
machining time and the overall cycle time of the process, the actual output will usually increase by 60 to 70 percent by
adding two more spindles. Individual exceptions with short time-consuming machining operations can reflect an
increase of more then 80 percent," according to STAMA research.
"While twin spindle machining needs to double the capacity of the tool magazine, the 4-spindle solution requires a tool
magazine to handle four times as many tools. The STAMA MC 531/TWIN is equipped with 56 tool places in the
standard version, for example, with options for magazines up to 120 tools.
"One major key in 4-spindle machining, with short tool-to-part contact times, is the load and unload sequences of the
workpieces. In such cases, as long as the machine isn't equipped with a quick automatic loading/unloading system,
pendulum machining is more advisable. This ensures parallel machining time while loading new workpieces. Time for
loading and unloading can then be as long as the actual cycle time of the machine. This will also result in less time
when the operator is interacting with the machine, thereby allowing the operator to run multiple stations in a work cell
setup, while keeping a constant touch time protocol on each machine," said the spokesperson.
"Under these conditions, for many workpieces studied by STAMA and
its customers, the '4 Plus 4' solution can result in major cost per part
reduction. With over 25 years' experience in TWIN spindle
technology, the simplicity of a common Z-headstock for twin spindles

from STAMA is well-accepted and proven technology worldwide. The
simplicity of this system is also used throughout this new TWIN
technology. Incorporating a state-of-the-art tool presetter, even single
spindle manufacturing challenges with high accuracy demands can be
realized with multi-spindle technology. The outstanding productivity
and high workpiece quality achievable are the benchmarks by which
STAMA TWIN spindle centers are known. The expansion to this 4-
spindle TWIN2 machining center technology is the logical
consequence of the company's latest research and machine
development strategies.
"Already in use at a STAMA customer in one of the BRIC markets is a new four-spindle TWIN2 machining center,
currently doing ABS housing manufacturing and connecting rod machining. This success for STAMA evidences the
simplicity and practical application of the company's highly productive manufacturing equipment," said the
spokesperson.

For more information contact:

STAMA America
1063 Hawthorne Drive
Itasca, IL 60143
630-233-8101 / 630-336-9795
Fax: 630-773-1660
simon.knecht@stama-america.com
www.stama-america.com

STAMA SYSTEM 3

2008-03-13T07:42:00.000-07:00

STAMA VMC FEATURES
180º SWIVEL TABLE
FOR NON-STOP PRODUCTION

System 3 from STAMA America is a line of single or TWIN spindle CNC vertical machining centers with a large 180º swivel work table design that allows both simultaneous machining operations as well as loading/unloading of workpieces. The result of this STAMA design is virtually non-stop productivity for all types of batch runs.

The key feature on System 3 machines is the rugged 180º swivel table with two separated clamping surfaces, ergonomically designed for easy access and safety. The worktable can accommodate up to 2 x 525kg (1155lbs.) workpieces, plus the unique enclosure allows free chip fall, suitable for wet or dry machining.

High rigidity headstocks are available with single or TWIN spindle technology. On the TWIN models, spindles can be provided on 266/320/400/600mm centers (10.47”/12.59”/15.74”/23.62”) for simultaneous machining of larger parts. The spindle cartridges are direct drive and are easily accessed for maintenance and changeover. Toolchangers with 42 positions are standard on the System 3 machines and up to 120 places as an option, with the patented STAMA tool management system that shortens chip-to-chip time. CAT 40 or HSK-A63 tool adapters are available standard.

Working ranges in the X/Y/Z axes are offered up to 700mm x 500mm x 400mm (27.56” x 19.68” x 15.75”). Spindle speeds to 20,000rpm and spindle torques to 200Nm process all types of materials.

System 3 machines are offered in four sizes and various configurations are available from STAMA to convert the machine to a fully operational work cell. These auxiliary options include portal loader, integrated part load/unload/storage, robotic loading via conveyor or customer transfer line integration and more. All aux functions are programmable and controlled by the powerful onboard CNC. Please contact STAMA application engineering for more details.

STAMA America is the U.S. subsidiary of STAMA Maschinenfabrik GmbH in Germany.

For more information, please contact:

STAMA

America

1063 Hawthorn Dr.
Itasca, IL 60143
Main Phone: (630) 233-8102

Fax: (630) 773-1660