Statistical analysis of resonance frequency error for ultrasonic welding machine transducer

2006 ◽  
Author(s):  
Zhang Yundian ◽  
Wang Qifang
Keyword(s):  
Statistical Analysis ◽  
Resonance Frequency ◽  
Ultrasonic Welding ◽  
Frequency Error ◽  
Welding Machine

Fabrication of Plastic Micro Features on Microporous Mold by Hot Embossing

2011 ◽  
Vol 58-60 ◽  
pp. 822-826 ◽  
Author(s):  
Hang Liu ◽  
Hong Hu ◽  
Xing Wei Zhang
Keyword(s):  
Stainless Steel ◽  
High Precision ◽  
Ultrasonic Vibration ◽  
Hot Embossing ◽  
Ultrasonic Welding ◽  
Ultrasonic Energy ◽  
Ultrasonic Agitation ◽  
Welding Machine ◽  
Micro Features

The method of using ultrasonic heating to aid high precision moulding of micro features has been studies. The study developed a method of using ultrasonic vibration to heat the polymer and hot embossing high precision micro features. A commercial ultrasonic welding machine is converted to provide the heating of polymer and mold then into precision micro features for study of ultrasonic heating and the microflow of polymer under ultrasonic agitation. A stainless steel microporous mold of 200µm thick with through holes of 50µm and 200µm in diameter were used. Using a frequency of 35kHz, the microflow behavior of PC (Polycarbonate) and PE (Polyethylene) in the microchannels were investigated. The differing properties of microflow for these two types of polymer give indication on the theoretical and practical agreement on prediction of microflow under ultrasonic energy.

Investigation of the Weldability of the Self-Reinforced Polypropylene Composites

2010 ◽  
Vol 659 ◽  
pp. 25-30 ◽  
Author(s):  
Zoltán Kiss ◽  
Ákos Kmetty ◽  
Tamás Bárány
Keyword(s):  
Ultrasonic Welding ◽  
The Self ◽  
Holding Time ◽  
Welding Parameters ◽  
Polypropylene Composites ◽  
Welding Machine ◽  
Reinforced Composite ◽  
Different Thickness

In the present work the weldability of self-reinforced composite was investigated. As reinforcement a fabric, woven from highly stretched split PP yarns, whereas as matrix materials of two kinds of random polypropylene copolymer (with ethylene) were used. The composite sheets were produced by film-stacking method and compression molded with different thickness (1 mm, 2 mm) with different contents at different processing temperatures keeping the holding time and pressure constant. The SRPPC sheets were welded by ultrasonic welding machine with different welding parameters. The welds were qualified by mechanical and microscopic tests. The results showed that the thermoplastic reinforcement has not got melted; therefore the reinforcement was kept the strength-increasing effect.

Seam properties of ultrasonic welded multilayered textile materials

2016 ◽  
Vol 46 (5) ◽  
pp. 1193-1211 ◽  
Author(s):  
Simona Jevšnik ◽  
Selin Hanife Eryürük ◽  
Fatma Kalaoğlu ◽  
Burçak Karagüzel Kayaoğlu ◽  
Petra Komarkova ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Bond Strength ◽  
Water Permeability ◽  
Bonding Strength ◽  
Water Resistance ◽  
Welding Process ◽  
Ultrasonic Welding ◽  
Welding Parameters ◽  
Textile Materials ◽  
Different Types

This study examined the effects of ultrasonic welding parameters on bond strength, seam thickness and seam stiffness, as well as water permeability. For study purpose, two types of four-layered fabrics with same compositions and different areal densities suitable for inner part of sport shoes were used. Two different types of seams, lapped and superimposed, were applied for ultrasonic welding and also compared by traditional seam applied by shoe manufacturer. The morphology of different type of seams was also analyzed to observe the influence of welding parameters on the layers during the ultrasonic welding process. Bonding strength was found to depend on the seam type and composition of the joined fabric layers. It was confirmed by the shoe manufacturer that all the produced welded seams provided the requested minimum bond strength to be suitable for the use of the shoes. The traditional seams applied by the shoe manufacturer were thicker but had lower stiffness in comparison to all welded seams. It was also found out that ultrasonic welding damaged the membrane, which was confirmed by no water resistance of welded seams. Statistical analysis showed that ultrasonic welding parameters, such as welding frequency and velocity, influence the bond strength, thickness, and bending stiffness of welded seams, but the obtained results were statistically insignificant.

scholarly journals Design and Analysis of Ultrasonic Polypropene Corrugated Box Welding Machine

2021 ◽  
Author(s):  
V R Kaveri ◽  
A B Gaikwad ◽  
A A Utpat
Keyword(s):  
Ultrasonic Welding ◽  
Innovative Technology ◽  
Market Place ◽  
Large Form ◽  
Welding Machine ◽  
Welding Spot ◽  
Plastic Welding

A wide style of ultrasonic corrugated plastic box welding machine options are available to you. Ultrasonic Polypropene corrugated box welders as a special purpose machine for variable sizes of Polypropene boxes that is a no bench type-welding machine to weld pp boxes is made with innovative technology at its perfection. “SANITEK PLASTOWELD SOLUTION” are a reliable manufacturer, trader, importer and exporter of the industry and established within the year 2010. They are the favoured name within the market place for providing very best quality assortment of plastic welding machine box, ultrasonic handgun, ultrasonic tube sealing machines and plenty of more products are designed and made by them. Ultrasonic welding provides good welding aesthetics. Manufacturing of ultrasonic Polypropene box welding machine is obtainable by “SANITEK PLASTOWELD SOLUTION”. No scratch guarantee for packed items. Polypropene corrugated boxes are nowadays used more as compare to the normal corrugated boxes, which were stapled and now corrugated box are joint by using ultrasonic welding. There is less rejection of packing items. A large form of ultrasonic Polypropene corrugated box welding machine options are available to you. No corrosion of joints means healthy packaging. This machine can weld one or more welding spot together which make it production friendly. With vision to sale its products in larger base company has laid emphasis on research. These are specifically designed to confirm easy handling reliable welding results, reproducibility while advancing, and optimizing the machine.

scholarly journals Tip-replaceable Horn with Full Wavelength for Ultrasonic Welding

2019 ◽  
Vol 257 ◽  
pp. 02008
Author(s):  
Mi Ae Kim ◽  
Chang Seo Im ◽  
Dong Sam Park
Keyword(s):  
Resonance Frequency ◽  
Natural Frequency ◽  
Ultrasonic Vibration ◽  
Frequency Characteristic ◽  
Vibration Mode ◽  
Ultrasonic Welding ◽  
Manufacturing Cost ◽  
Welding Material ◽  
Welding Equipment ◽  
Environmental Friendly

Ultrasonic welding is faster, environmental friendly, and more efficient than conventional welding. Ultrasonic welding stack, the key part in ultrasonic welding equipment, is composed of transducer, booster, and horn. In the case of ultrasonic welding, wear in the welding tips or breakage of horn occurs because ultrasonic vibration of tips is transmitted directly to the welding material. If grinding of the tips is repeated several times, the mass of horn is reduced and the frequency characteristic is changed. So, there is a limit to refurbishment. In additions, as materials of horn are relatively expensive, some cost problems could be occurred for replacing horns. This study, in order to reduce the manufacturing cost of horn, devised a tip-replaceable ultrasonic horn so that its tip can be easily replaced whenever it is worn. For the designed shape, natural frequency and vibration mode are analyzed using FEA. Through the FEA, the optimal tip-replaceable horn with resonance frequency of 40 kHz is proposed.

In Vitro Evaluation of the Primary Stability of Short and Conventional Implants

2016 ◽  
Vol 42 (6) ◽  
pp. 458-463 ◽  
Author(s):  
Guilherme José Pimentel Lopes de Oliveira ◽  
Luiz Antônio Borelli Barros-Filho ◽  
Luiz Antônio Borelli Barros ◽  
Thalita Pereira Queiroz ◽  
Elcio Marcantonio
Keyword(s):  
Statistical Analysis ◽  
Bone Density ◽  
Resonance Frequency ◽  
Confidence Level ◽  
Primary Stability ◽  
Insertion Torque ◽  
Type I ◽  
Type Iv ◽  
Short Implants

The objective of this study was to evaluate the primary stability of short and conventional dental implants with different platform types at different site densities in vitro. One hundred twenty implants were placed in polyurethane blocks that simulate different bone densities (bone types I and IV). The implants were divided into 10 groups, with 12 implants each according to the type of prosthetic connections (external hexagon, EH; morse taper, MT) and size of the implants (conventional: 4 × 10 mm; short: 5 × 5, 5.5 × 5, 5 × 6, and 5.5 × 6 mm). Insertion torque and resonance frequency analyses were performed to evaluate the primary stability. The Kruskal-Wallis test complemented by Dunn's test and the Mann-Whitney test were used for statistical analysis. These tests were applied at the confidence level of 95% (P < .05). The implants installed in blocks with density type IV exhibited reduced insertion torque compared with implants placed in blocks with density type I. Short implants with EH exhibited increased insertion torque compared with short implants with MT in blocks with bone density type I. In general, implants installed in blocks with density type I exhibited greater primary stability. The short implants with EH with a 5.5-mm diameter and the short implants with MT with a 5-mm diameter exhibited reduced primary stability. No differences between short and conventional implants were noted. Short implants have primary stability and insertion torque at least equivalent to conventional implants irrespective of the platform type and density of the site.

Statistical analysis of classification

1966 ◽  
Vol 24 ◽  
pp. 188-189
Author(s):  
T. J. Deeming
Keyword(s):  
Multivariate Analysis ◽  
Statistical Analysis ◽  
Classification Scheme ◽  
Analytical Procedure ◽  
Narrow Band ◽  
Scientific Research ◽  
Maximum Amount ◽  
Amount Of Information

If we make a set of measurements, such as narrow-band or multicolour photo-electric measurements, which are designed to improve a scheme of classification, and in particular if they are designed to extend the number of dimensions of classification, i.e. the number of classification parameters, then some important problems of analytical procedure arise. First, it is important not to reproduce the errors of the classification scheme which we are trying to improve. Second, when trying to extend the number of dimensions of classification we have little or nothing with which to test the validity of the new parameters.Problems similar to these have occurred in other areas of scientific research (notably psychology and education) and the branch of Statistics called Multivariate Analysis has been developed to deal with them. The techniques of this subject are largely unknown to astronomers, but, if carefully applied, they should at the very least ensure that the astronomer gets the maximum amount of information out of his data and does not waste his time looking for information which is not there. More optimistically, these techniques are potentially capable of indicating the number of classification parameters necessary and giving specific formulas for computing them, as well as pinpointing those particular measurements which are most crucial for determining the classification parameters.

Quantitative parallel EELS spectrum imaging developed as a new tool in AEM

1992 ◽  
Vol 50 (2) ◽  
pp. 1202-1203
Author(s):  
Gianluigi Botton ◽  
Gilles L'espérance
Keyword(s):  
Statistical Analysis ◽  
Spatial Resolution ◽  
Personal Computer ◽  
Systematic Study ◽  
Present Author ◽  
Chemical Elements ◽  
Detection Limits ◽  
Research Groups ◽  
Quantitative Performance ◽  
Spectrum Imaging

As interest for parallel EELS spectrum imaging grows in laboratories equipped with commercial spectrometers, different approaches were used in recent years by a few research groups in the development of the technique of spectrum imaging as reported in the literature. Either by controlling, with a personal computer both the microsope and the spectrometer or using more powerful workstations interfaced to conventional multichannel analysers with commercially available programs to control the microscope and the spectrometer, spectrum images can now be obtained. Work on the limits of the technique, in terms of the quantitative performance was reported, however, by the present author where a systematic study of artifacts detection limits, statistical errors as a function of desired spatial resolution and range of chemical elements to be studied in a map was carried out The aim of the present paper is to show an application of quantitative parallel EELS spectrum imaging where statistical analysis is performed at each pixel and interpretation is carried out using criteria established from the statistical analysis and variations in composition are analyzed with the help of information retreived from t/γ maps so that artifacts are avoided.

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