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Helpful application examples for mechanical engineers.
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IDEA NOTE Transportation from above by using a roller carrier
Transporting workpiece from above is effective for cases where no space is available at the bottom.
IDEA NOTE Adding a backup plate
A Back plate is added to the back of the cap for reinforcement.
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Assembly data shows the assembly drawings in the concept design phase. The sole purpose of the data is to explain the structure and functionality of the assembly and is not considered nor to be used as a final design.
You will need to edit the Data so that it meets your specific design conditions.
Unit assembly Data consists of some sub-assemblies.
It is configured so that each sub-assembly unit can be used as it is or edited.
* The part in the frame is a sub-assembly unit.
The Data for fabricated parts is based on easy-to-edit dimensions and shapes in sketches and histories.
The Data including the third-part components are made by the Company.
* Unit assembly Data consists of some sub-assemblies.
It is configured so that each sub-assembly unit can be used as it is or edited.
Application Overview
Purpose
Transferring a workpiece using a cylinder rather than a motor.
Visual inspection for defective workpiece.
Parts are transported to a position accessible by the operator for inspection.
Points for use
Space Savings.
Workpiece is detected by a proximity sensor before and after lead-in.
Target workpiece
Plastic box
External dimensions: W100x D100x H70mm (2 pieces)
Pallet
External dimensions: W240xD150xH95mm
Weight: 10kg
Design Specifications
Operating Conditions or Design Requirements
Rod-less cylinder stroke: 830mm
Guided cylinder stroke:20mm
External dimensions: W1140xD350xH352mm
Selection Criteria for Main Components
Roller carrier
Selected as a conveyor without drive.
Linear guide
The moment load is not large, and therefore, select the one best suited for the whole device size.
Rod-less cylinder
Selected for conducting transportation.
Adjusting Stopper Screws
Select a stopper screw that is capable of fine adjustment to securely hold the workpiece.
Design Evaluation
Verification of main components
Select each cylinder (guided and rod-less) from workpiece gripping force and workpiece transportation load.
Guided cylinder
Select a cylinder that can withstand the workpiece load
Force needed to grip the workforce = Cap weight =0.2kg=2N・・・①
Cylinder thrust = Load factor x Operation Pressure x Tube I.D. Cross Section =0.5×0.4MPa×π/4×20mm×20mm =62.8N > 2N (= ①) ⇒Thus, select a cylinder with φ 20mm.
Rod-less cylinder
Force necessary for transportation = weight of object to be transported x friction coefficient of roller carrier =10kg×0.03 =0.3kg=3N・・・②
Cylinder thrust = Load factor x Operation Pressure x Tube I.D. Cross Section =0.5×0.4MPa×π/4×25mm×25mm =98N>3N(= ②) ⇒Thus, select a cylinder with φ 25mm.
Other Design Consideration
Transportation is possible with access from above the workpiece. Effective for cases where no space is available at the bottom.
A proximity sensor, for which post assembly installation and removal is possible, is used for the sensor of the rod-less cylinder, aiming at workability improvement. When the sensor attached to the rod-less cylinder is used, the sensor is difficult to adjust because of LM guides mounted on the right and left sides.
In this case, mounting the proximity sensor outside the linear guides aims at workability improvement.