TITLE
EFFECT OF THE POSITION OF THE APPLYING FORCE ON THE ELASTIC COMPLIANT MECHANISM'S TRANSFER CURVE

AUTHOR(S)
Dobri Komarski

ABSTRACT
Precision rotary positioning systems are used for orientation of different objects at a certain angle around its axis of rotation with high accuracy. Goniometric positioning systems as a part of the rotary systems provide high precision angular positioning but the axis of rotation is outside the working area, most commonly above the working platform. These systems are used in a wide variety of applications, including optics, microscopy, semiconductor manufacturing, aerospace. As these applications need high accuracy positioning systems in the field of micro- and nanotechnology, a Goniometric positioning system with elastic guides was developed. One of the main characteristics of such a system is the behavior of its transfer curve or how linear/predictable it is in a different use case. Subject of this paper is a study of the effect of the position of the applying force over the transfer curve nature based on the Finite element analysis. This is important as the position where the linear actuator is applying force on the goniometric elastic module could impact the transfer curve e.g. accuracy in case there is a deviation during manufacturing. assembly or different design constrains that doesn’t allow this position to be the optimal theoretical position.

DOI
http://www.doi.org/10.70456/VZAB6787

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https://unitechsp.tugab.bg/images/2024/13-QMMSCA/s22_p197_v1.pdf

How to cite this article:
Dobri Komarski, EFFECT OF THE POSITION OF THE APPLYING FORCE ON THE ELASTIC COMPLIANT MECHANISM'S TRANSFER CURVE, UNITECH – SELECTED PAPERS - 2024

TITLE
NUMERICAL EXPERIMENTS TO INVESTIGATE THE LASER MARKING PROCESS OF C35 STEEL SAMPLES

AUTHOR(S)
Nikolay Angelov¹, Miroslav Kokalarov²

ABSTRACT
The research concerns the process of laser marking by melting C35 structural steel samples. Numerical experiments are done for fiber laser and CuBr laser technological systems. Temperature fields are obtained for different values of power density, speed and two values of wavelength. The temperature dependence of the material parameters was reported. Graphs of temperature versus power density for three speeds and temperature vs. speed for three power densities are plotted. The results have been analyzed and preliminary operating intervals have been determined for these quantities for the laser marking process by melting.

DOI
http://www.doi.org/10.70456/ZEKZ5479

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https://unitechsp.tugab.bg/images/2024/13-QMMSCA/s22_p70_v1.pdf

How to cite this article:
Nikolay Angelov¹, Miroslav Kokalarov², NUMERICAL EXPERIMENTS TO INVESTIGATE THE LASER MARKING PROCESS OF C35 STEEL SAMPLES, UNITECH – SELECTED PAPERS - 2024

TITLE
INVESTIGATIONS OF LASER CUTTING MODES ON THE QUALITY OF DIFFERENT CUT PARAMETERS

AUTHOR(S)
Viktor Georgiev, Nikolay Hristov, Nikolay Tonchev

ABSTRACT
This paper is a review article that details the parameters of laser cutting on the quality of the cut, considered as a critical factor of performance, aesthetics and functionality. For certain gauge sizes, two main thicknesses of low carbon steel sheet are considered in more detail in terms of tolerance accuracy. The main conclusions relate to the quality of specified thicknesses at different, materials and capacities, for which manufacturing experience is also shared. From the study done, it can be determined that the laser cutting technology and its quality can be formalized by input-output, after specifying them, the quality can be identified. It is through this that the purpose of the study is realized.

DOI
http://www.doi.org/10.70456/PVCS9659

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https://unitechsp.tugab.bg/images/2024/13-QMMSCA/s22_p93_v2.pdf

How to cite this article:
Viktor Georgiev, Nikolay Hristov, Nikolay Tonchev, INVESTIGATIONS OF LASER CUTTING MODES ON THE QUALITY OF DIFFERENT CUT PARAMETERS, UNITECH – SELECTED PAPERS - 2024

TITLE
THE PDCA CYCLE IN INNOVATION MANAGEMENT SYSTEMS BASED ON ISO 56001:2024

AUTHOR(S)
Tzvetelin Gueorguiev1*

ABSTRACT
The Plan-Do-Check-Act (PDCA) cycle is a keystone feature of the structure of any ISO management system standard (MSS). The most popular MSS - ISO 9001:2015 with requirements for a quality management system focuses on the PDCA cycle in its section devoted to the process approach which is also one of the seven quality management principles. In September 2024, ISO published the first edition of ISO 56001 - the standard with requirements for an innovation management system. The structure of ISO 56001 from Clause 6 to Clause 10 is aligned with the steps of the PDCA cycle at the system level. Surprisingly, Clauses 4 and 5 which contain requirements for the innovation management system and leadership are not explicitly mentioned. The purpose of this paper is to present a method for analyzing and uncovering the steps of the PDCA cycle at the clause/process level, and further on – at the activity level. The work preceding the drafting of this paper involved an in-depth analysis of the core text of ISO 56001:2024 and using previous research on ISO 56002:2019 as a guide to determine the steps of the PDCA cycle. The results will facilitate managers in enhancing their integrated management systems with elements of innovation management.

DOI
http://www.doi.org/10.70456/UIFI9691

DOWNLOAD
https://unitechsp.tugab.bg/images/2024/13-QMMSCA/s22_p5_v2.pdf

How to cite this article:
Tzvetelin Gueorguiev1*, THE PDCA CYCLE IN INNOVATION MANAGEMENT SYSTEMS BASED ON ISO 56001:2024, UNITECH – SELECTED PAPERS - 2024