scholarly journals Experimental verification of the joints strength features in the quality control of the mass-produced upholstery frames

2021 ◽  
Vol 338 ◽  
pp. 01024
Author(s):  
Ewa Skorupińska ◽  
Krzysztof Wiaderek ◽  
Łukasz Matwiej ◽  
Maciej Sydor
Keyword(s):  
Quality Control ◽  
Mass Production ◽  
Load Capacity ◽  
Testing Machine ◽  
Robotic Technology ◽  
Technological Parameters ◽  
Wooden Frame ◽  
Universal Testing ◽  
Yield Behaviour

An upholstery frame is an element of upholstery furniture, which is heavily loaded with forces. Critical to the quality of the frame is the load capacity of the connections of its structure elements. Moreover an important issue is the repeatability of the suitable strength in the whole production batch. Tested wooden frame joints were made with glue and staples. The goal of our study was to compare the strength of the joints made by a man and by a robot in industrial mass production. The laboratory test was done on an universal testing machine which measure the stress–strain characteristics showing the yield behaviour of test samples. The results show that a “robotic technology” gives slightly higher strength values than the manual production. It was also observed that the force value distributions in compared two series of samples have different nature in the both technologies. Based on the observation of the technologies and based on the analysis of the research results, it was found that the reason for this is the greater constancy of technological parameters in robotic production (in the described case, the bigger variability of the strength of connections made by man was caused by the different exposure time of the adhesive to drying, while in “robotic” production gluing, was done in the same throughout the long production series).

scholarly journals Quality identification methodology applied to wall-elements based on modal analysis

2015 ◽  
Vol 11 (4) ◽  
pp. 507-516 ◽  
Author(s):  
Mariusz Zóltowski ◽  
Ronald M. Martinod
Keyword(s):  
Quality Control ◽  
Modal Analysis ◽  
Mass Production ◽  
Design Methodology ◽  
Production Quality ◽  
State Assessment ◽  
Critical Levels ◽  
Content Type ◽  
Current Mass

Purpose – The recommendation of structural standards, e.g. PN-B-03002, shows a need to control the production quality of wall-elements; the quality control demands suitable guidelines to fit the requirements of the current mass-production of the wall-elements, then, the structural standard recognizes the need of improving the methods to identify the real elements quality. The paper aims to discuss these issues. Design/methodology/approach – The proposed inspection methodology corresponds to assessment models that combine the numerical and symptomatic models to evaluate the critical levels of wall-elements, based on non-intrusive tests through the measurement of a set of signals, using the Experimental Modal Analysis (EMA)-based techniques. Findings – The presented work is developed with an approach that applies advanced calculating techniques used for the structural analysis in civil engineering focused on the technical state assessment. Originality/value – The paper proposes a diagnostic methodology that can be added to the current regulations and standards based on EMA techniques.

Performance Improvement Of Shrink-Fitted Assemblies by Surface Strengthening

1992 ◽  
Vol 206 (3) ◽  
pp. 207-213 ◽  
Author(s):  
B Ramamoorthy ◽  
V Radhakrishnan
Keyword(s):  
Performance Improvement ◽  
Testing Machine ◽  
Experimental Investigations ◽  
Ball Burnishing ◽  
Surface Strength ◽  
Interference Fit ◽  
Surface Strengthening ◽  
Compressive Stresses ◽  
Universal Testing

Interference fits are widely used in engineering applications. Many methods have been tried out to improve the strength of interference fits by improving the quality of the mating surfaces. An experimental investigation was carried out to study the strength of the assemblies after ball burnishing the shafts, which improves the surface finish and also imparts the surface strength by way of improving the hardness and residual compressive stresses. The assemblies were soaked for different duration times at elevated temperature and then the axial load-bearing tests were carried out in a Universal testing machine. The surface strengthening of shafts by burnishing and ageing of assemblies at high temperature resulted in considerable improvement of strength of the interference fit assemblies. This paper discusses the experimental investigations in detail and analyses the strength obtained from them.

scholarly journals Based on PCI Software Day Draw Satellite is Projective Like Making Technology Discussed in This Paper

2018 ◽  
Vol 227 ◽  
pp. 02013
Author(s):  
Ming Zhao ◽  
Rui Wang ◽  
Yongming Xu ◽  
Xiaochun Xu
Keyword(s):  
Quality Control ◽  
Production Process ◽  
Orthogonal Projection ◽  
Mass Production ◽  
Control Method ◽  
Quality Of Results ◽  
Quality Control Method ◽  
Software Production ◽  
Key Technologies

This article introduces the use of PCI software production day draw satellite is projective like production process, analyzes the key technologies in the production, summarizes the Suggestions to improve the quality of results, strengthen quality control method is proposed, for the day draw satellite orthogonal projection as mass production work has carried on the beneficial exploration.

scholarly journals Fatigue Testing of Dental Bridges on Selected Examples

2017 ◽  
Vol 11 (1) ◽  
pp. 53-57
Author(s):  
Dariusz Urban ◽  
Marek Jałbrzykowski ◽  
Maria Gołębiewska
Keyword(s):  
Fatigue Testing ◽  
Testing Machine ◽  
Cyclic Fatigue ◽  
Zirconia Ceramic ◽  
Metal Base ◽  
Cyclic Loading And Unloading ◽  
Universal Testing ◽  
Functional Quality ◽  
Loading And Unloading

Abstract The paper presents example tests of the functional quality of selected designs of dental bridges. These were: porcelain bridges on a metal base (cobalt based alloy), porcelain bridges on a zirconia base (zirconia ceramic – Zirkon Zahn), and full zirconia bridges (Zirkon Zahn). For the purpose of the study, durability of bridges in cyclic fatigue testing was adopted as a measure of their quality. The tests were carried out on a Zwick Roell Z010 universal testing machine. They consisted in cyclic loading and unloading of dental bridges mounted on gypsum models at a loading force of F= 400 [N] and a frequency of load of f= 1 [Hz]. Each bridge was subjected to a cycle of 7200 loads. The results show that there are no significant differences in the functional quality of the bridges.

scholarly journals Experimental evaluation of the load capacity of the rollers of gravity conveyors for pallets

2020 ◽  
Vol 1 (3) ◽  
pp. 59-64
Author(s):  
Ye.V. Safronov ◽  
◽  
A.L. Nosko ◽  
Keyword(s):  
Load Capacity ◽  
Testing Machine ◽  
Experimental Studies ◽  
Test Results ◽  
Load Range ◽  
Universal Testing ◽  
Urgent Task ◽  
The Stability ◽  
The Cost ◽  
Roller Support

The main approaches to calculating the load capacity of the carrying rollers of gravity conveyors are presented. It is shown that in practice, in the designs of modern non-driven conveyors for pal-lets, the priority when choosing the pitch of the carrier rollers is the stability of the movement of the load, rather than minimizing the number of rollers. In connection with the urgent task of reducing the metal consumption and the cost of gravity roller conveyors for pallets, the purpose of the work is to experimentally determine the load capacity of the rollers of gravity conveyors for pallets with plastic bearing housings. The experimental studies were carried out in the laboratory of the Depart-ment of Applied Mechanics on a Galdabini Quasar 50 universal testing machine using a special roller support for two roller designs - with a solid axis and on half-axles. The test results showed that the stiffness of a roller with a solid axis in the load range up to 670 N is about 1358.4 N / mm, and in the load range from 670 to 1500 N - 2229.9 N / mm. The rigidity of the roller on the axle shafts in the entire load range is 2048.0 N / mm. The analysis of the obtained results showed that for loads over 670N the use of the axle slightly increases the stiffness coefficient, and, on the contrary, it decreases in the load range up to 670N. In order to reduce the cost of carrying rollers with plastic bearing housings, it is advisable to use a design on semi-axles.

Research on Field Filling and Penetration Test of Highly Plastic Clay

2013 ◽  
Vol 405-408 ◽  
pp. 207-210
Author(s):  
Zhi Li Sui ◽  
Xu Peng Wang ◽  
Zhao Guang Li ◽  
He Zhang
Keyword(s):  
Quality Control ◽  
Compacted Clay ◽  
Penetration Test ◽  
Technological Parameters ◽  
Plastic Clay ◽  
Particle Composition ◽  
Construction Schedule ◽  
Detection Evaluation

This paper has discussed the mechanism of compacted clay and the influence of compaction and penetration effected by different technological parameters such as particle composition and times of compaction etc. This research is important to ensure the quality of construction, accelerate the construction schedule, and provide reference for detection, evaluation and quality control of projects with similar requests.

Statistical Quality Control

1945 ◽  
Vol 5 (04) ◽  
pp. 207-217
Author(s):  
H. C. H. Carpenter
Keyword(s):  
Quality Control ◽  
Statistical Methods ◽  
Mass Production ◽  
Manufacturing Process ◽  
Statistical Quality Control ◽  
Statistical Quality ◽  
The Subject

The actuary's ideas on statistics tend to be biased in the direction of Life Office statistics. It may therefore be useful to set down a simple use of statistical methods which has been adopted in industry and which was the subject of a lecture to the Students' Society some two years ago, viz. Statistical Quality Control. Where the mass production of articles is employed, various systems of inspection aim at watching the quality of the product to prevent unsatisfactory work being passed on to the consumer or to a later stage in the manufacturing process.

Overview of Gc Tests Used to Evaluate Composite–Composite Adhesive Joints

2019 ◽  
Vol 10 (03) ◽  
pp. 1842002
Author(s):  
José Cañas ◽  
Luis Távara ◽  
Antonio Blázquez ◽  
Alejandro Estefani
Keyword(s):  
Testing Machine ◽  
Bonded Joints ◽  
New Device ◽  
Universal Testing ◽  
Aerospace Sector ◽  
Horizontal Drum ◽  
Very High ◽  
Actual Part

The quality of composite–composite bonded joints is a very important issue for industries, especially for the aerospace sector. A deficient joint may stop the manufacturing process and its repairing may include very high costs. Nowadays, the quality of the joint is obtained by means of interlaminar fracture toughness tests, estimating the [Formula: see text] value (Energy Release Rate used to produce crack propagation) over coupons with (theoretically) the same conditions as those included in an actual part. Usually, [Formula: see text] is obtained by means of a Double Cantilever Beam (DCB) test. Although DCB is the reference test, it may present some drawbacks when a non-symmetrical coupon is used and when the adherents stiffness is low. An alternative to DCB is the Climbing Drum Peel (CDP) test which is able to address some of the DCB drawbacks. Nevertheless, both tests need the use of a universal testing machine, then they cannot be done in situ. In the present investigation, DCB and CDP main characteristics are analyzed and a new device, called Horizontal Drum Peel (HDP), which includes the advantages of previous tests and the possibility to perform the test over an actual part is presented.

scholarly journals Porosity, pore size and compressive strength of self compacting concrete using sea water

2018 ◽  
Author(s):  
erniati ◽  
muhammad wihardi tjaronge ◽  
Ulva ria irfan
Keyword(s):  
Compressive Strength ◽  
Pore Size ◽  
Sea Water ◽  
Testing Machine ◽  
Concrete Compressive Strength ◽  
Self Compacting Concrete ◽  
Universal Testing ◽  
Compressive Strength Test ◽  
Mixing Water

Indonesia is the largest archipelago in the world, so it has much territory that the quality of the source water is not qualified as mixing water in construction. Besides, construction of concrete in areas that are likely quantity of water or fresh water is very minimal or even nothing then the sea water cannot be avoided in mixing concrete. This research was an experimental study, the samples for compressive strength test are cylindrical premises size of 10 mm×20 mm. The porosity relation, compressive power, age and model of porosity relationship with SCC concrete compressive strength which using sea water is discussed in this paper. Compressive strength testing is following the standard ASTM 39/C 39-99. Universal Testing Machine (UTM) was used in the testing of compressive strength. A test specimen for porosity created by taking part of the cylinder and then slashed with a size of approximately 2 cm×3 cm with a 0.003 mm thick. The type and pore size and porosity were analyzed by using a polarizing petrography microscope Olympus BX 51-P. The result of the research was increased the compressive strength and density of microstructures in line with the decrease in porosity and pore size of concrete and concrete age. Compressive strength relations (σ ss ) and porosity (p ss ) the SCC used seawater can be approximated equation σ ss = σ o (1-p)K, with σ o = 119.6 and K = 7.502.

Development and Application of Quality Control System for Highway Subgrade Construction

2019 ◽  
Vol 2 (5) ◽  
Author(s):  
Tong Wang
Keyword(s):  
Quality Control ◽  
Real Time ◽  
Detection Method ◽  
System Development ◽  
Effective Control ◽  
Construction Process ◽  
Development Mode ◽  
The Road ◽  
Whole Process

The compaction quality of the subgrade is directly related to the service life of the road. Effective control of the subgrade construction process is the key to ensuring the compaction quality of the subgrade. Therefore, real-time, comprehensive, rapid and accurate prediction of construction compaction quality through informatization detection method is an important guarantee for speeding up construction progress and ensuring subgrade compaction quality. Based on the function of the system, this paper puts forward the principle of system development and the development mode used in system development, and displays the development system in real-time to achieve the whole process control of subgrade construction quality.

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