3D PRINTING OF ABS+ MATERIAL BENDING TESTS IN PRINTING POSITION A – HORIZONTAL POSITION

The aim of the work is to theoretically and practically highlight the possibility of large-scale realization of 3D printed parts using Fused Deposition Modeling technology. To demonstrate this we propose to make a series of samples from several materials, using several printing positions, which we will subject to destructive tests to demonstrate that they can be successfully used in industry. It is known that each material has certain mechanical characteristics, but the influence of the position in which the layers are deposited to obtain the final product in terms of mechanical properties will also be demonstrated through this work. The material from which the first set of samples will be made is ABS+, and the printing position that is the subject of this experimental research is printing position A – horizontal positio

Efficiency of a production line by application of the Kanban method

This paper aims to present the study on the implementation of the Kanban system for the "bicycle wheel" benchmark in demand-side conditions. Due to variations in customer orders, production on the "Wheels" line is inconsistent, with work volume being also variable. In this way, dead times appear, production stagnating at some times, and in others being overstretched. There is a problem of finding a method of leveling the production, which also leads to a better performance of the Logistics department within the "Expedition" service. The work was carried out following a study with data provided by SC MECHROM INDUSTRY SRL, a member of the CAMPAGNOLO group, a bicycle manufacturing company, exclusively for performance sport

Case study on measuring the level of stress in the academic environment in France

The study is a novelty because was elaborated on a group of students in the academic environment in France. Following the documented steps, I have noticed that several questionnaires have been used in order to identify stress levels in the academic environment. The case study presented in this article consists in a questionnaire meant to identify stress factors. There are several factors that are likely to cause stress: changes to routine, time pressure, difficult tasks, too much homework’s, financial state, sleep schedule and physical work conditions. I believe that stress management results could be visible if we can motivate people to adjust their behavior and life styl

Researches and studies regarding brazed aluminium alloys microstructure used in aeronautic industry

Brazing is applied to the merge of the pieces which are most required, tensile strength of the solder can reach high values. By brazing there can be assembled pieces of most metals and ferrous and nonferrous alloys, with high melting temperature. This paper presents an analysis of the microstructure of materials from a brazed merge of aluminum alloy L103 which is often used to produce pieces of aeronautical industry. Brazing material was performed using several technologies, and after examination of the microstructure of materials from the merge area it was established as optimal technology the technology which consist of pickling in Aloclene 100 solution with the deposition of filler material on both sides of the base material and the use of spectral acetylene and neutral flame. Key words

Unique method for structural synthesis of the machines planed with bars and dogs

The planar mechanisms with articulated bars and gears (which we will simply note MeBaRd) are part of the general planar mechanics category. Although structural structural studies have been carried out [7], the structural synthesis of bars and wheels can be approached as a distinct problem. Some papers refer directly to a certain class of mechanisms, such as planetary mechanisms [1], [2], others stop on subsystems with zero mobility, called structural groups with toothed elements [6], [8]. In this paper, developing some ideas presented in [3], [5], a general algorithm for unitary structural synthesis of MeBaRd was developed and developed, having the input parameters: M - the degree of mobility and N - the number of contours

3D PRINTING OF ABS+ MATERIAL BENDING TESTS IN PRINTING POSITION B – VERTICAL POSITION

The present work is part of a series of works that deal with the manufacture by 3D printing of some specimens for mechanical tensile and bending tests. The samples are made by 3D printing from three types of materials such as ABS+, PETG and PLA+. The printing positions are A-horizontal position, B-vertical position and C-lateral position. In order for the mechanical tests of the samples to be conclusive, 5 samples of each material and from each printing position must be made by 3D printing. The purpose of the mechanical tests is to investigate the mechanical characteristics of the filaments from which the 3D printed samples are manufactured, with the aim of replacing some classically manufactured components within water well drilling installations. The present work deals only with the manufacture by 3D printing in vertical position B, of a number of 5 specimens for bending

Contribution to the measurement of stress level post stress management training

The case study presented in this article consists in a questionnaire meant to detect stress in employees after a stress management training session. The study is a novelty because was elaborated on a group of employees after they learn one months about occupational stress management. Over the time, many of the studies conducted in the field of stress focus on a combination of the factors like this: reducting stress exposure and developing programes for physical exercises - relaxation and meditation. It is very important to have information about stress because it can change the perspective of life and the way in which we can see that a situasion can be negative or positive one

Integral curses of the disc drama model with fundamental dynamic characteristics tt-ds

The paper deals with the dynamic response of mechanisms with standardized inertial and mechanical characteristics. Moment or inertial mass is periodically variable with displacement, and torque or mechanical force are periodically variable with displacement and represented by linear, square or cubic functions in relation to speed. In this paper both the inertial moment and the torque variation were used for the T-shift. For the variations of torque torque versus speed, the straight-inclined DS was used. Comparable results charts are based on computer programs

Impact on quality of production using 5S method

Efficient and quality work requires a clean environment, security and rigor. The principle of 5S, namely Seiri, Seiton, Seiso, Seiketsu, Shitsuke, allows the construction of a functional working environment, driven by simple, precise and efficient rules. The 5S is the foundation on which progress is being made, the deployment of Lean-manufacturing means and methods, being a lever of change management. At the same time, the 5S can be considered as the basic rules of order, discipline, unmistakable preliminaries for a whole improvement project

IMPLEMENTATION OF THE ANDROID SOURCE CODE FOR “COHEN QUESTIONNAIRE – TO IDENTIFY THE LEVEL OF STRESS”

This paper aims to present the study on the implementation of the source code for a Cohen questionnaire meant to detect stress level. The importance of this study consists in a unique mobile app for Cohen test. The results can be used for several research’s studies. We used instruments such us HTML, CSS, JavaScript, PHP, server web and MYSQL to develop the application for Android.The application is composed of 10 questions and at the end of test the users we received some recommendations to reduce stress at work