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Video: Rack And Pinion Gear For Positioning And Handling Systems
Positioning tasks occur in many industries: in automobile production as well as in the food industry or in mechanical and plant engineering. The portal systems that transport components or products from one processing station to the next must be robust and flexible. Rack and pinion gear units from Leantechnik are very suitable as components of these systems because they are precise and resilient and meet high demands on synchronicity and speed.
The company's rack and pinion gearboxes are called Lifgo and Lean SL. They are produced in different sizes and designs and are designed in such a way that all designs can be combined with one another within one size. Thanks to this modular system, the user has an infinite number of options for using the gearbox. Lifgo and Lean SL are characterized by different properties that complement each other well: while the robust Lifgo rack and pinion gearboxes can absorb high lateral forces, the Lean-SL gearboxes with a circular rack are ideal for simple synchronous lifting movements that do not require the rack to be guided is.
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Use in palletizing systems
Which rack and pinion gear the lean technology designers choose for the respective positioning system depends heavily on the individual task.
In the case of a palletizing system for technical raw parts, they developed, for example, a portal system based on rack and pinion drives from the Lifgo 5 series in the versions Lifgo linear and Lifgo linear double. The system should bring the raw parts for processing from the blister into a corresponding station by placing them on a conveyor belt. After processing, she had to remove the finished parts from the treadmill at the same place and put them back in the blister. In a further step, the blisters should finally be palletized.
"The particular difficulty was the given cycle times," recalls Lukas Piofczyk, designer at Leantechnik. "The entire process to the finished product should be completed in 12 seconds." In addition to the actual machining process, this also included the stacking of the blisters with the raw and finished parts between the individual work steps.
Tailor-made partial and functional systems
In order to solve the complex task, the lean technology engineers developed a tailor-made portal system that combines a 2-axis palletizer and a 3-axis gripper arm. Leantranspo refers to this product line as Leantechnik, which includes partially and fully functional systems based on the robust and combinable rack and pinion gearboxes Lifgo and Lean SL, which combine horizontal and vertical strokes on a mechanical basis.
"The advantage of the feeding device we designed lies in the 3-axis gripper arm," says Piofczyk. “With the help of appropriate rotary axes, any movement in cubic space can be carried out and any position can be approached. In combination with the 2-axis palletizer, we were therefore able to easily achieve the required cycle times.”The 3-axis gripper arm moves horizontally along the two racks on the underside of the portal using a Lifgo linear module. Two guide carriages were used on the second rack to stabilize the system. They significantly increase the bending stiffness of the axis and absorb the transverse forces that occur.
Lukas Piofczyk and his colleagues equipped the 2-axis palletizer for the blister transfer with two gearboxes of the Lifgo double version and with two linear units of the Lifgo linear version.
Content of the article:
- Page 1: Rack and pinion gear for positioning and handling systems
- Page 2: Robust gear with gripper function
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