Investigation of Friction Coefficient of Various Polymers Used in Rapid Prototyping Technologies with Different Settings of 3D Printing

Perepelkina, Svetlana; Kovalenko, Pavel; Pechenko, R.V.; Makhmudova, Karina

doi:10.24874/ti.2017.39.04.11

Cited by 36 publications

(24 citation statements)

References 16 publications

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“…The penalty method was used to model the contact interaction between the thin plate and the stainless table with a friction coefficient of 0.34. The friction coefficient between the shoulder connector and the rigid rods was set to 0.6 according to Perepelkina et al (2017) because both parts were modeled as PLA material. The spring was modeled as “engineer feature of spring” in Abaqus with a spring constant of 2.55 N/mm; this spring connects the shoulder connector and the rigid rod in a similar manner to the gripper prototype.…”

Section: Contact Analysismentioning

confidence: 99%

A Scooping-Binding Robotic Gripper for Handling Various Food Products

et al. 2021

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Food products are usually difficult to handle for robots because of their large variations in shape, size, softness, and surface conditions. It is ideal to use one robotic gripper to handle as many food products as possible. In this study, a scooping-binding robotic gripper is proposed to achieve this goal. The gripper was constructed using a pneumatic parallel actuator and two identical scooping-binding mechanisms. The mechanism consists of a thin scooping plate and multiple rubber strings for binding. When grasping an object, the mechanisms actively makes contact with the environment for scooping, and the object weight is mainly supported by the scooping plate. The binding strings are responsible for stabilizing the grasping by wrapping around the object. Therefore, the gripper can perform high-speed pick-and-place operations. Contact analysis was conducted using a simple beam model and a finite element model that were experimentally validated. Tension property of the binding string was characterized and an analytical model was established to predict binding force based on object geometry and binding displacement. Finally, handling tests on 20 food items, including products with thin profiles and slippery surfaces, were performed. The scooping-binding gripper succeeded in handling all items with a takt time of approximately 4 s. The gripper showed potential for actual applications in the food industry.

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Section: Contact Analysismentioning

confidence: 99%

A Scooping-Binding Robotic Gripper for Handling Various Food Products

et al. 2021

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“…In this paper, the experimental research of the materials for the design of brakes was carried out with the use of the universal friction machine MTU-1 that is based on a vertical milling machine "JMD-X1" and contains the original friction assembly unit that allows us to save the parallelism of the contacted surfaces [21,22].…”

Section: Experimental Researchmentioning

confidence: 99%

Investigation of Dynamic Friction Coefficient in Brake Systems

Kovalenko¹,

Perepelkina²

2019

PES

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In this paper, the research of friction coefficient changes in the tribopairs carbon-fiber-reinforced silicon carbide (C/SiC) -steel 37Cr4 and C/SiC -steel C22 used in cars brake systems was carried out for the selection of suitable materials and conditions of usage that provide a vehicle with high performance and safety of braking. Brakes made of C/SiC are very effective in sport cars, but they are expensive, which makes it impossible to use such materials for design of both pads and discs in the brake systems of trucks and offroad vehicles. The main goal of this work was to choose the most suitable material for manufacturing of brake discs interacting with C/SiC pads in order to decrease the cost of brake systems without decreasing their performance. According to the results of the research, the tribopair C/SiC -steel C22 could be used in heavy loaded trucks and massive off-road vehicles.

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“…Three-dimensional printing is a production method that uses only digital technology to produce pieces, as opposed to machining methods such as turning, milling, drilling, etc., in which the material is cut out. Although the focus of 3D printing technologies has been developed primarily for prototype purposes, it has become possible to fabricate metallic structures and a much wider variety of functional parts, with increased emphasis on mechanical properties [2,3].…”

Section: Introductionmentioning

confidence: 99%

Surface Roughness Quality, Friction and Wear of Parts Obtained on 3d Printer

Nedić¹,

Slavkovic²,

Đurić³

et al. 2019

PES

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The achievement of the required roughness of the surface (today known as surface texture) is of great importance in obtaining the required characteristics of the parts from the aspect of reduction of friction and wear. The most common methods for obtaining the required roughness, or surface textrure, are laser treatment and micro-processing by milling. 3D printingis increasingly being used to produce parts of wide range of applications. In order to obtain the neccessary surface texture, the use of 3D printing technology compared to traditional technologies is faster, more flexible and cheaper. So far, a small number of studies have been related to the surface characteristics of parts produced by 3D printing.Therefore, all the researches in this field in order to improve the friction and wear characteristics have significant role.This work provides an insight into the research of tribological characteristics of surface of samples made from polymers which are most commonly used materials in 3D printing technologies. The surface roughness, friction and wear are measured using tribometer and experimental method "Block-on-Disk". The results shows significant differences in measured values in the tested materials, which demand further researches in order to.

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Investigation of Friction Coefficient of Various Polymers Used in Rapid Prototyping Technologies with Different Settings of 3D Printing

Abstract: A B S T R A C T This paper deals with the research of friction coefficient in tribopairs

Cited by 36 publications

References 16 publications

A Scooping-Binding Robotic Gripper for Handling Various Food Products

A Scooping-Binding Robotic Gripper for Handling Various Food Products

Investigation of Dynamic Friction Coefficient in Brake Systems

Surface Roughness Quality, Friction and Wear of Parts Obtained on 3d Printer

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