Study on Design of Welding-Joint and Structure of Welding Based on Ultrasonic Welding Technology

2011 ◽  
Vol 101-102 ◽  
pp. 871-875 ◽  
Author(s):  
Yi Jun Huang
Keyword(s):  
Welding Process ◽  
High Technology ◽  
Ultrasonic Welding ◽  
Design Requirement ◽  
Welding Joint ◽  
Welding Technology ◽  
Welding Spot ◽  
Increase Productivity ◽  
Quality Of Products

Ultrasonic welding is the application of high-technology for welding thermoplastic products. Various thermoplastic parts can be treated by ultrasonic welding without adding any solvent, adhesive or other auxiliaries, which can increase productivity many times, reduce cost and improve the quality of products. Ultrasonic welding technology is being used widely. This article focuses on the application of ultrasonic welding technology, and has a detailed statement of the design of welding spot by using ultrasonic welding technology, the welding structure, the design requirement for ultrasonic welding, and the ultrasonic welding process.

The Effect of the Material and the Geometric Shape of the Waveguides on the Process of Ultrasonic Welding of Plastics

2019 ◽  
pp. 25-32
Author(s):  
S.S. Volkov ◽  
V.M. Nerovnyy ◽  
G.A. Bigus
Keyword(s):  
Welding Process ◽  
Polymeric Materials ◽  
Ultrasonic Welding ◽  
Wave Resistance ◽  
Tool Geometry ◽  
Acoustic Characteristics ◽  
Oscillatory Systems ◽  
Materials Used ◽  
Quality Of Products

This article briefly describes basic elements of machines for ultrasonic welding of plastics and the main materials used for manufacturing elements of ultrasonic waveguide oscillatory systems. A relationship between the amplitude of fluctuations of the welded material and a ratio of wave resistance of the product material and the waveguide tool geometry is examined. It is shown that when welding plastic products of a large thickness, it is practical to use waveguides made from aluminum alloys with a working end face with a diameter of 15 mm. It is established that the closer the acoustic characteristics of the waveguide material and the plastic are, the fuller the transfer of ultrasonic energy is when transiting through the interface of the welded polymeric materials. To assess the distribution of amplitudes of fluctuations in the welded material it is more convenient to use a transmission ratio, which decreases with a decrease in the wave resistance. It is established that the sizes of the working end face of the waveguide are most often defined by the properties, dimensions and geometry of the welded product. The application of the developed recommendations to the choice of material and sizes of the working end face of the waveguide can increase technological reliability of the ultrasonic welding process and improve quality of products.

scholarly journals The Influence of Fillers and Dyes on the Quality of Weld Joints at Ultrasonic Welding of Plastics

2020 ◽  
pp. 13-20
Author(s):  
S.S. Volkov ◽  
A.V. Konovalov ◽  
A.L. Remizov
Keyword(s):  
Welding Process ◽  
Ultrasonic Welding ◽  
Climatic Conditions ◽  
Organic Pigments ◽  
Disperse Fillers ◽  
And Performance ◽  
Quality Of Products ◽  
Increased Strength ◽  
The Impact

In this work, the impact of dyes and fillers on the process of heat generation during ultrasonic welding of plastics was studied, which made it possible to influence the weldability and quality of products. Experiments to weld samples of plastics with various concentrations of dyes and fillers were carried out. Based on the experimental data, it was established that the main parameters of the welding process and the properties of the polymer influenced weldability and performance indicators of the weld joint. The nature and the concentration of the dyes and fillers injected into the polymer to obtain certain characteristics and colors had an impact as well. Optimal concentrations that provided the best weldability, strength and quality of the weld products were obtained for fat-soluble dyes and organic pigments (0.1–1.5 g/kg) as well as disperse fillers and inorganic pigments (5–12 g/kg). Types of dyes and fillers and their optimal concentrations for fat-soluble dyes, organic pigments and disperse fillers were determined. Parameters of the process of ultrasonic welding of dyed and filled plastics were defined. It was established that welded products with the recommended optimal concentration and types of dyes and fillers showed the best weldability, increased strength and performance, and could be used longer under various climatic conditions.

scholarly journals Contributions Regarding the Use of Mechanical Vibrations in Order to Improve the Properties of Steels and Welded Joints Used in Metal Constructions

2020 ◽  
Vol 21 (2) ◽  
pp. 67-71
Author(s):  
Gheorghe Novac ◽  
Bogdan Novac
Keyword(s):  
Welded Joints ◽  
Arc Welding ◽  
Significant Contribution ◽  
Welding Process ◽  
Internal Stresses ◽  
Welding Equipment ◽  
Welding Technology ◽  
Submerged Arc ◽  
Very High

The paper presents aspects regarding the influence of vibrations on the mechanical properties of welded joints, made with basic materials of Spanish and Romanian origin. In this research is presented the practical way to make the necessary assemblies for the proposed tests. The tests show that vibrations have a significant contribution to the quality of welded joints. This is explained by the appearance of several crystallization centres which makes the structure finer. By using vibrations, the atoms are rearranged in the structure, ensuring a proper de-tensioning. The stresses induced in welded metals are significantly reduced by the use of vibration during welding process. The addition materials have a significant contribution to the emergence of stresses in welded joints as well. These stresses can contribute to the appearance of microstructural constituents with significant hardness. The welding equipment and technologies used also have a significant contribution to the emergence of the remaining stresses. For example, the submerged arc welding technology (SAF) can introduce very high internal stresses. By using vibrations during the welding process, it is achieved a fine structure and a significant reduction of remaining stresses in the welded joints.

Features of the Heating Process in Ultrasonic Welding of Polycarbonate Products under Independent Pressure

2020 ◽  
pp. 54-62
Author(s):  
S.S. Volkov ◽  
A.L. Remizov ◽  
A.S. Pankratov
Keyword(s):  
Welded Joints ◽  
Welded Joint ◽  
Welding Process ◽  
Ultrasonic Welding ◽  
Heating Process ◽  
Mechanism Of Formation ◽  
High Quality ◽  
Acoustic Contact ◽  
Welding Pressure

This paper presents a mechanism of formation of a hard-to-weld polycarbonate joint by ultrasonic welding. The method utilizes internal and external friction occurring in the welded joint area on abutting surfaces due to shear vibrations of the end of the upper part relative to the lower part. A layer of the heated welded material is formed, localized by thickness, in which predominant absorption of the ultrasonic vibrations occurs, which allows one to obtain high-quality and durable welded joints without significant deformation due to the concentration of thermal energy in the welding zone. The effect of independent welding pressure on the strength of the welded joint of polycarbonate is considered. A new method of ultrasonic welding under the conditions of independent pressure is proposed. The method consists of dividing the static welding pressure into two components: the pressure of the acoustic contact in the zone of contact of the waveguide with the product, and the welding pressure that compresses the welded products, with the latter component being lower than the former. In order to obtain high-quality welded joints made of polycarbonate and to prevent displacement of the welded edges during the welding process relative to each other, a special preparation of the welded edges is developed, which allows one part to be moved vertically relative to the other during the welding process. It is established that the quality of welding depends on the speed of movement and the angle of cutting the edges.

scholarly journals INFLUENCE OF MICROBIC PREPARATIONS AND MINERAL FERTILIZERS ON THE DISEASES RESISTANCE AND PRODUCTIVITY OF SOYBEAN CULTIVARS

2011 ◽  
Vol 13 ◽  
pp. 59-69
Author(s):  
V.P. Derevyanskyi ◽  
O.S. Vlasyuk ◽  
D.V. Krutylo ◽  
T.M. Kovalevska ◽  
S.P. Nadkernychnyyi ◽  
...  
Keyword(s):  
Bradyrhizobium Japonicum ◽  
Growth And Development ◽  
Mineral Fertilizers ◽  
Soybean Cultivars ◽  
Increase Productivity ◽  
Quality Of Products ◽  
Resistance To Diseases

Influence of complex of factors (mineral fertilizers, treatment of seed and crops with microbiological preparations) on plants resistance to diseases and productivity of different soybean cultivars was studied. Compositions, which allow to improve plants growth and development, as well as decrease diseases prevalence and increase productivity and quality of products were selected. The models of soybean cultivars with microorganisms – Glуcine max–Bradyrhizobium japonicum were created.

scholarly journals Mechanized Placement of Drip Tape in Potato Comb

2022 ◽  
Vol 42 ◽  
pp. 03004
Author(s):  
Boris M. Kizyaev ◽  
Victor I. Balabanov ◽  
Natalia B. Martynova
Keyword(s):  
Weather Conditions ◽  
Growing Season ◽  
Agricultural Products ◽  
Irrigation Rate ◽  
The Past ◽  
Mechanized Method ◽  
Increase Productivity ◽  
Quality Of Products ◽  
Additional Losses

Over the past two years, decrease in potato yield has been observed in the Moscow region. One of the main reasons is unfavorable weather conditions. To obtain a guaranteed yield, as well as to improve the quality of products, it is necessary to carry out reclamation works, including additional irrigation. Creation of the optimal water - air balance of the plant throughout the entire growing season will increase productivity, and improve the quality of agricultural products. Drip irrigation is the most economical method of irrigation, but its widespread use is hindered by the high proportion of manual labor when installing the drip tape. A mechanized method of laying the drip tape by placing the working equipment on the Grimme GF-75/4 comb former is offered. The existing methods for determining the irrigation rate do not consider the parameters of the humidification circuit, which leads to excessive irrigation and additional losses of irrigation water. The paper offers a method for determining the irrigation rate considering the shape of the humidification circuit and its geometric parameters.

Welding Technology of Ultra-Low Carbon and Nitrogen Ferrite Stainless Steel

2010 ◽  
Vol 654-656 ◽  
pp. 354-357
Author(s):  
Bao Sen Wang ◽  
Shuang Chun Zhu ◽  
Xia Ning Ye
Keyword(s):  
Stainless Steel ◽  
Heat Affected Zone ◽  
Heat Input ◽  
Welding Process ◽  
Low Carbon ◽  
Carbon And Nitrogen ◽  
Welding Joint ◽  
High Toughness ◽  
Process Gas ◽  
Welding Technology

Weldability of ultra low carbon and nitrogen, low chromium ferrite stainless steel is analysed by using Thermol-cal software and welding metallurgy. Eembrittlement of welding joint is the failure reason during application of ultra low carbon and nitrogen 12% chromium FSS. Comparing welding joint performance of different welding process, Gas Metal Arc Weldinng with high toughness welding material and proper welding heat input is economical and feasible welding process. Controlling growth of ferrite grain is the key to improve toughness of the heat affected zone (HAZ). Presence of titanium carbides or nitrides and the amount of martensite located along ferrite grain intergranular boundaties are very important for toughness of HAZ in low chromium FSS. It was found that the best size of Ti(C/N) grain is 2-5μm and content of martensite is 40%.

Adopting Industrialisation in the Construction Environment: Meeting the Requirements of Sustainability

2016 ◽  
Vol 13 (2) ◽  
pp. 45 ◽  
Author(s):  
Muhamad Faiz Musa ◽  
Mohd Reeza Yusof ◽  
Noor Sahidah Samsudin ◽  
Faridah Muhamad Halil
Keyword(s):  
Construction Industry ◽  
Structure Interview ◽  
Foreign Workers ◽  
Construction Productivity ◽  
Semi Structure Interview ◽  
Push Forward ◽  
Increase Productivity ◽  
Quality Of Products ◽  
Poor Site

The construction industry should move from conventional construction method and adopt the industrialisation concept, to increase productivity and deliver quality construction end products. Industrialisation is the combination of a large market to divide into fractions the investment in strategies and innovation, in return, of simplifying the production and, therefore, reducing the costs. The introduction of Degree of Industrialisation by Roger-Bruno Richard is critical to the construction industry. The five degrees of industrialisation are prefabrication, mechanisation, automation, robotics and reproduction. Richard’s Degree of Industrialisation is in line with the Malaysian government’s vision to be a developed nation by 2020, to push forward the use of innovative technologies in most industries including the construction industry. The adoption of industrialisation and innovations in the Malaysian construction industry has the potential to solve the current problems in the construction industry. The problems are the inferior quality of products and processes, a poor site working conditions, low construction productivity, high construction cost, relying on foreign workers and lack of skill labours. The adoption of industrialisation and innovations promote sustainability in the construction environment. The objectives of the study are to investigate whether the adoption of industrialisation in the construction environment promotes sustainability and to identify the current level of industrialisation of the Malaysian construction industry. The methodologies of the study are semi-structure interview and observation. The Malaysian construction industry is ready to embrace industrialisation in construction environment in limited areas and industrialisation promotes sustainability in the construction environment.

scholarly journals IMPLEMENTATION OF LEAN METHODOLOGY THE PRODUCTION COMPANY // IMPLEMENTACIJA LEAN METODOLOGIJE U PROIZVODNIM PREDUZEĆIMA

2018 ◽  
Vol 15 (1) ◽  
Author(s):  
Sabina Šehić - Kršlak
Keyword(s):  
Continuous Improvement ◽  
Production System ◽  
Customer Value ◽  
Manufacturing Companies ◽  
Growth Increase ◽  
Business Efficiency ◽  
Increase Productivity ◽  
Quality Of Products ◽  
Production Company

As a modern way of thinking lean methodology uses tools that are directed towards the continuous improvement of the functioning of the system with continuous perfection. Lean production (LP) means less work in the workplace, less manufacturing space, less investment, less time and fewer tools and supplies. The methodology is designed so that it is planned and managed in stages, necessary for the realization of the objectives defined production system. Lean companies are primarily focused on growth, increase profitability and customer value, but also increase productivity, improve the quality of products and processes, as well as the delivery systems are also important elements for improving business efficiency. This paper will present the methodology of implementation of lean concepts for improving productivity in manufacturing companies.

scholarly journals Adopting Industrialisation in the Construction Environment: Meeting the Requirements of Sustainability

2016 ◽  
Vol 13 (2) ◽  
pp. 45
Author(s):  
Muhamad Faiz Musa ◽  
Mohd Reeza Yusof ◽  
Noor Sahidah Samsudin ◽  
Faridah Muhamad Halil
Keyword(s):  
Construction Industry ◽  
Structure Interview ◽  
Foreign Workers ◽  
Construction Productivity ◽  
Semi Structure Interview ◽  
Push Forward ◽  
Increase Productivity ◽  
Quality Of Products ◽  
Poor Site

The construction industry should move from conventional construction method and adopt the industrialisation concept, to increase productivity and deliver quality construction end products. Industrialisation is the combination of a large market to divide into fractions the investment in strategies and innovation, in return, of simplifying the production and, therefore, reducing the costs. The introduction of Degree of Industrialisation by Roger-Bruno Richard is critical to the construction industry. The five degrees of industrialisation are prefabrication, mechanisation, automation, robotics and reproduction. Richard’s Degree of Industrialisation is in line with the Malaysian government’s vision to be a developed nation by 2020, to push forward the use of innovative technologies in most industries including the construction industry. The adoption of industrialisation and innovations in the Malaysian construction industry has the potential to solve the current problems in the construction industry. The problems are the inferior quality of products and processes, a poor site working conditions, low construction productivity, high construction cost, relying on foreign workers and lack of skill labours. The adoption of industrialisation and innovations promote sustainability in the construction environment. The objectives of the study are to investigate whether the adoption of industrialisation in the construction environment promotes sustainability and to identify the current level of industrialisation of the Malaysian construction industry. The methodologies of the study are semi-structure interview and observation. The Malaysian construction industry is ready to embrace industrialisation in construction environment in limited areas and industrialisation promotes sustainability in the construction environment.

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