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Tag Archives: machining unit

L-MAX – A New and Unique Way To Machine Multiple Layer & Composite Materials

For best results in the machining of multiple material layers, cutting parameters must be applied for each different material. The new L-MAX, a portable drilling unit from SOMEX (a member of the SUHNER group of companies)  can perform all of these functions in automatic mode.

Portable L-MAX drilling unit

Multiple material layers, also referred as Stacks, can be composed of completely different materials, stacked up in layers of, for ex ample: Titanium, Carbon or Aluminum. In order to achieve optimal machining results, each material layer must be programmed with its own cutting parameters- ideally for each layer automatically. The spindle speed and feed rate must be adapted for each material transition to the next.

In the past, aluminum was the primary choice of materials used in the aircraft industry and portable, handheld pneumatic-driven drilling units were used as a common tool in this industry.

The application of these conventional pneumatic drilling units in today’s modern and innovative aircraft industry necessitates extreme compromises. In addition to large air consumption combined with high noise emissions, pneumatic-driven drilling units cannot perform feed and speed variations as required for different stack materials.

Mobile control system IDM

Mobile control system IDM

Consequently, only a portable, handheld NC-programmable drill unit is capable to deliver optimal results and high efficiency, since the aircraft industry imposes rigid quality standards including:

– Concentricity / position between holes ≤ 40 μm

– Surface quality between Ra 1.6 und Ra 3.2

– Circularity / Hole quality for rivets ≤ H8

– Other requirements such as avoidance of delamination.

Working principle for a portable, handheld
NC-programmable L-MAX drilling unit

An L-MAX concept integrates 2 servo motors: The larger motor drives the spindle and the smaller servo regulates the feed. The feed rate is determined by the speed difference between ball screw and ball screw nut or, in other words:

– If the speed (rpm) of the feed servo motor is higher than the spindle motor speed (rpm), then the L-MAX spindle will advance.

– If the speed (rpm) of the feed servo motor is lower than the spindle motor speed (rpm), then the L-MAX spindle will retract.

Both servo motors are controlled by the control system IDM. It allows the user to regulate spindle speed and feed at any position of the total travel.

Furthermore, an adaptive drilling mode can be selected to help improve and optimize a drilling cycle. In this mode, the drill unit  recognizes the transition from one layer to the next, automatically. Irregular material thickness of layers at any position are detected and matched with the correct cutting parameters. This way, cycle times can be minimized and machining quality and results optimized.

The control system includes a Minimum Quantity Lubrication (MQL) system, which is directly mounted to the mobile platform.

1Performance data drilling unit L-MAX:

– Programmable spindle speed and spindle feed

– Work cycles such as chip brake cycle and peck feed cycle Spindle speed range from 3,000 rpm up to 5,000 rpm

– Drilling capacity from 4.76 mm (3/16”) up to 11.11 mm (7/16”)

– Integrated Minimum Quantity Lubrication (MQL)

– Light weight, depending on drilling capacity, from 5.5 kg (12lbs)

– Quiet operation up to 65 dBA

– Option: Adaptive drilling mode

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SUHNER INDUSTRIAL PRODUCTS, CORP.
Hwy 411 S./Suhner Drive
P.O. Box 1234
Rome, GA 30162
Phone:  706-235-8046
Fax:  706-235-8045
Attention:  Lee Coleman, Automation Division
www.suhner.com
automation.usa@suhner.com

Text and pictures files can be found and down loaded at:
www.suhner-press.com

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25% More Speed – High Speed Machining Unit Type BEX15 Takes Off To Even Higher Speed Levels

SUHNER introduces a new and re-designed version of its BEX15 machining unit, capable of a spindle speed increase from 18,000 rpm to 23,000 rpm
BEX15_mounted2 Chip producing machining operations with modern tools today demand progressively higher cutting speeds, specifically for metals with high cutting speed rates or small diameter hole drilling applications. The SUHNER machining unit type BEX15, proven in thousands of installations, now provides new speed options, reliably up to the maximum speed limit. With an increase of 25% up to a permissible maximum spindle speed of 23,000rpm,  operations requiring higher spindle speeds can be accomplished more easily.

This improvement is the result of a complete redesign of drive and spindle bearing components. A new style timing belt drive multiplies the motor speed up to 13,050rpm spindle speed. An AC-inverter drive is used to increase the spindle speed up to 23,000rpm at 87Hz.BEX15

The machining unit BEX15 can be applied in axial and radial orientation, directly mounted to a SUHNER slide assembly type UA15-PH or UA15-CNC. In this combination, numerous machining operations such as milling or demanding drilling cycles, including jump or peck feed, can be accomplished very easily.

Four optional tool holder systems (Collet ER25, ISO30, HSK50 and Weldon) , standard air purge connections for spindle and belt housing including a number of additional options (for example: coolant through the spindle or automated tool change features), make this machining unit type BEX15 highly adaptable and an optimal choice for demanding and specific machining requirements.

BEX15_mounted

 

suhnerlogo

SUHNER INDUSTRIAL PRODUCTS, CORP.
Hwy 411 S./Suhner Drive
P.O. Box 1234
Rome, GA 30162
Phone:  706-235-8046
Fax:  706-235-8045
Attention:  Lee Coleman, Automation Division
www.suhner.com
automation.usa@suhner.com

Text and pictures files can be found and down loaded at:
www.suhner-press.com

Continue reading