Solder And Soldering
Mostrando 1-11 de 11 artigos, teses e dissertações.
-
1. Analysis of Ball Soldering Parameters on the Properties of a BGA Packaged Semiconductor
Integrated circuits have several applications, including medicine and the aerospace industry, where reliability is essential. Packaging is an important step in the manufacturing of integrated circuits, and ball soldering is one of the most critical process, especially in assembling and interconnecting integrated circuits. The solder joint formed during the b
Mat. Res.. Publicado em: 01/02/2018
-
2. Comparison Between the Heating Rates of a Magnetic Induction Soldering Iron and Another One Composed of Resistance
AbstractIn this work an experimental and comparative analysis is realized in order to determine the difference in the heating rate and thus the power consumption, between a magnetic induction soldering iron and another one of low cost composed of electric resistance. By maintaining a constant power supply 40 W, three models of comercial tips designed for the
Soldag. insp.. Publicado em: 2015-06
-
3. Distribuição das tensões geradas em implantes interconectados com barra dolder, após solda a laser
The Implant-retained prostheses need passivity and justness in their settlement, which are considered prerequisites for the osseointegration success. To minimize distortions and to promote passive settlement it is used the cut and solder of the piece. This work investigated, through photoelasticity, the distribution of stress generated by implants interconne
Publicado em: 2007
-
4. Caracterização mecânica e microestrutural de juntas soldadas pelos processos MIG/MAG (GMAW) e arame tubular (FCAW)
Os processos de soldagem MIG/MAG e Arame Tubular são amplamente aplicados na indústria de petróleo. Ambos os processos podem ser aplicados em uma variedade de aços, tais como baixo carbono, inoxidável rntre outras ligas ferrosas. Outra característica importante destes dois processos é a excelente produtividade devida a possibilidade de automação dos
Publicado em: 2005
-
5. Influencia da geometria da junção soldada na resistencia a fadiga de ligas do sistema cobalto-cromo
The purpose of this study was to investigate the fatigue stength of the system Co-Cr (Dentorium and Degussa), submitted or not to the procedure conventional soldering. Cylindrical eighty specimens with 1,7 mm in diameter were casted utilizing oxi-acetilene torch for each alloys kind. The soldering procedure was realizated in sixty specimens of each alloy and
Publicado em: 1998
-
6. Resistencia a fadigas de ligas do sistema Co-Cr, submetidas ou não a procedimentos de refusão e soldagem
The aim of this study was to evaIuate the fatigue strength of Steldent, Dentorium and Biosil partiaI denture framework Co-Cr based alloys, as new and in mixture of new and previously casted alloy, submitted or not to convencional soldering procedure. Forty rods with 1,7mm in diameter were casted with oxi-acetilene torch for each of the alloys tested. Half sp
Publicado em: 1995
-
7. Resistencia flexural de ligas do sistema Co-Cr antes e apos a refusão submetidas ou não a soldagem
The purpose of this investigation was to determine the flexural strength of Dentorium, Duracrom and Steeldent, commercially available Co-Cr based alloys, subdued or not to soldering procedure, using only new alloy or a mixture of new and previously casted alloy. Twenty dumb-shaped specimens were manufactured for each one of the alloys, divided into four grou
Publicado em: 1993
-
8. Contribuição ao estudo da soldagem em ortodontia
This essay had as objective to evaluate the traction resistance of silver- solder available on the market, determining the max mum res stance limit. 3 commerical types of silver solder were used cne produced in Brazil (Morelli) and two produced out-side Brazil (Nabi l-Metal and Unitek) . Fifteen solderings were carried out with each of the three solders essa
Publicado em: 1992
-
9. Occupational asthma in an electronics factory.
Workers in a modern electronics factory were surveyed by questionnaire and lung function testing to see if there was evidence of widespread work-related respiratory symptoms. Of the responding workers exposed to solder flux fumes on the shop floor, 22% had work-related breathlessness or wheeze or both. Exposed workers had a lower FEV1 and FVC than unexposed
-
10. Work-related respiratory disease in employees leaving an electronics factory.
Examination of the records of employees leaving an electronics factory over three-and-a-half years showed that a significantly greater proportion left the shop floor (where soldering took place) because of ill health than left the stores and office areas. This difference was largely due to work-related respiratory disease in those whose job was soldering. Sh
-
11. Occupational asthma in an electronics factory: a case control study to evaluate aetiological factors
This is the final part of a study carried out to investigate occupational asthma due to sensitivity to colophony fumes (a component of soldering flux) in an electronics factory. Fifty-eight workers with occupational asthma employed on the main shop floor were investigated. In them the interval between first exposure and sensitisation varied widely with a gro