Assessment of the Manufacturing Possibility of Thin-Walled Robotic Portals for Conveyor Worklace

Michalík, Peter; Dobránsky, Jozef; Hrabovský, Leopold; Petrus, Michal

doi:10.12913/22998624/87063

Cited by 10 publications

(8 citation statements)

References 15 publications

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“…A powered roller conveyor is a device in which the rotation of the rollers is provided by an external force, thus overcoming the resistance that the roller conveyor imposes on the conveyed object [2].…”

Section: Description Of the Measuring Stationmentioning

confidence: 99%

Detection of movement resistance and friction coefficient in the transport of building materials and construction materials

Hrabovský

2024

MATEC Web Conf.

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In the production of building materials and construction materials, continuously operating conveying equipment is commonly used, including roller conveyors. Roller conveyors are devices designed for horizontal, slightly ascending or descending transport of piece products moving on a system of rotating rollers of different shapes (cylindrical, conical, disc, pulley or according to the profile of the conveyed object). The rotating rollers are placed in the track frame (supporting structure), which can be either stable, relocatable or adjustable (height and length adjustable, so-called scissor conveyors). An analogue of the roller conveyor is the pulley conveyor, where instead of rollers, discs - pulleys are mounted on a non-rotating axis. Several discs are installed on the axis with gaps. The pulleys on adjacent axes overlap so that there is no continuous gap. The track is used for handling flat building parts and objects such as metal sheets, glass panes, furniture parts, etc. When transporting item building materials or bulk building materials placed in storage boxes which are transported on a powered roller track on pallets, a driving force is required depending on the angle of inclination of the roller track, the weight of the load, the number of rollers on which the load rests and the coefficient of shear friction during movement. The paper presents a laboratory device that has been designed to detect the adhesion force during the transport of piece loads by a roller conveyor. On the implemented device, it is possible to determine in laboratory conditions the amount of resistance to the movement of the load on the driven roller conveyor depending on the weight of the load. The paper presents measured values of the shear friction coefficient during the movement of a steel storage box on a driven roller track. In this paper, a driven roller track is used for laboratory tests, where the drive of the rollers is implemented by so-called short chains. In addition to horizontal tracks, this chain drive allows you to drive rising tracks with variable gradients or even rising curved tracks.

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Section: Description Of the Measuring Stationmentioning

confidence: 99%

Detection of movement resistance and friction coefficient in the transport of building materials and construction materials

Hrabovský

2024

MATEC Web Conf.

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“…One of the device variant [2,3,4,5,7,9] is, at the moment the tensile force in the rope needs to be recorded, placed in a space where the rope is attached using suspension bolt [2,3] to console [6], built-in in the elevator shaft of the given traction elevator or attached to the frame of the given elevator cage [9, 16,18,22]. One of the several [3,10,17] structural designs of the hydraulic rope equalizers is presented in [9].…”

Section: Literature Reviewmentioning

confidence: 99%

Laboratory Device for Checking the Functionality of the Elevator Rope Sensors

Hrabovský

Borovsky²

2020

Management Systems in Production Engineering

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The paper describes the structural design of a laboratory device that allows for presenting operation, simulating work procedures and checking functionality of the elevator “rope sensors” when equalizing different tensile forces in partial ropes of a rope system of traction elevators. The laboratory device is modified for checking operations of commonly used rope sensors. In an overwhelming number of cases, elevator technicians use them for setting up the unequally distributed tensile forces in elevator ropes. The device is equipped with three, mutually attached pulleys, over which the rope is installed. The unknown tensile force in the rope is determined by an “indirect method”, i.e. from the resultant of the forces of the rope bent over the pulleys, which have an effect on the force sensor. The tensile force along the rope axis can be determined numerically, but also experimentally, from the inclination angle of the rope installed on the pulleys, diameter of the pulleys, diameter of the rope and the force detected by the force sensor of the stretched rope. The paper presents experimentally obtained tensile force values at the rope sensor, deduced from stretching the rope. The paper also describes the procedure for determining the measured load in the rope by rope sensors of the SWR, SWK and RMT-1 types based on the variable axial force in the rope.

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“…The effect of the resulting torque (from the weight of the load on the lever arm) produces the tensile force T [N] on the circumference of the drive crane wheels [4]. It is assumed according to Chapter 2 "Theory of Transmission of Tensile Force through Adhesion" that this force is in balance with an adhesion force Fig.…”

Section: Experimental Determination Of Adhesion Coefficient On the LImentioning

confidence: 99%

“…The highest tensile force on the circumference of the travelling drive wheel, which is not yet slipped, is called the tensile force on the adhesion limit F Tadh [N], see (4).…”

Section: Introductionmentioning

confidence: 99%

Adhesion Coefficient on the Limit of Slippage at Star-Up of the Manual Crane Trolley

Hrabovský¹,

Mantič²,

Voštová³

2019

Adv. Sci. Technol. Res. J.

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Cranes are common handling devices used in construction, assembly and engineering plants. Bridge cranes with a suspended crane trolley (electric or manual operated hoist) are used in almost all engineering and service operations. The trouble-free operation of these devices depends on many factors; one of the parameters influencing the operation of crane trolleys (crane trucks) and crane bridges is adhesion. The presented paper describes the theoretical assumptions, experimental determination and verification of the coefficient of adhesion on the limit of slippage at starting of the manual crane trolley.

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Assessment of the Manufacturing Possibility of Thin-Walled Robotic Portals for Conveyor Worklace

Cited by 10 publications

References 15 publications

Detection of movement resistance and friction coefficient in the transport of building materials and construction materials

Detection of movement resistance and friction coefficient in the transport of building materials and construction materials

Laboratory Device for Checking the Functionality of the Elevator Rope Sensors

Adhesion Coefficient on the Limit of Slippage at Star-Up of the Manual Crane Trolley

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