scholarly journals ABOUT FORM LIBIT AND METHODS DETERMINATION PARAMETER WIND THREADS OF THE BASE ON LIBIT-WARPING DRUM

2020 ◽  
pp. 100-105
Author(s):  
Siddikov Patkhillo Siddikovich, ◽  
Umarova Munavvar Omonbekovna
Keyword(s):  
Machine Construction ◽  
Cylindrical Roll

Considered determination form wind of the threads libit on libit-thread base drum and thickness of rolling with consideration of the machine construction and forms of thread rolls of libits. Samples are provided for determining the scope and thickness of libit rolls. KEYWORDS: fabric, avrov fabric, avrband, libit, libit reels, roll layers, libit thread base, libit wrapping roll, cylindrical roll, breaking of roll–reels, segment, sector, libit scope.

Discussion on “Fabricated machine construction” at the London Section of the Institution

1938 ◽  
Vol 17 (11) ◽  
pp. 748
Author(s):  
Muncaster ◽  
Stoessel ◽  
Nolan ◽  
Banks ◽  
Finlay ◽  
...  
Keyword(s):  
Machine Construction

Progress report of the machine construction and FEL program on LISA at LNF

1992 ◽  
Vol 318 (1-3) ◽  
pp. 168-172 ◽  
Author(s):  
M. Castellano ◽  
P. Patteri ◽  
F. Tazzioli ◽  
J. Zhuang ◽  
N. Cavallo ◽  
...  
Keyword(s):  
Progress Report ◽  
Machine Construction

Welding Shape Control of Cross Member Backbone Assembly by Automatic Gas Metal Arc Yaskawa-MA1440 Type

2021 ◽  
Vol 877 ◽  
pp. 90-95
Author(s):  
Lydia Anggraini ◽  
Kalimi
Keyword(s):  
Shape Control ◽  
Gas Flow ◽  
Gas Metal Arc Welding ◽  
Travel Speed ◽  
Machine Construction ◽  
Weld Strength ◽  
Automatic Welding ◽  
Leg Length ◽  
Steel Coil ◽  
Cross Member

In order to prevent distortion caused by heat which affects the material deformation, the properties controlled are required. The properties changes and the placement of the mounting position will effect the weld strength that causes cracks and broken joints, therefore it affects the safety of machine construction. Thus, the objective of this paper is to control the shape of cross member backbone assembly by gas metal arc welding (GMAW). The welding is produced by an automatic robot Yaskawa-MA1440 type. In order to obtain the good quality of the result, the welding shape is controlled by a parameters combination of voltage, current, and speed. Yaskawa-MA1440 type is used as the automatic welding machine. The main material used is cold rolled steel coil sheet MJSC270D-OD with a thickness of 1.2 mm. In addition, to control the welding shape, the specified shape design standard is followed include travel speed, gas flow, welding direction, torch tip distance to the workpiece, torch angle and welding angle. The results of visual and dimensional were also examined in this research. Furthermore, the macrostructure i.e. leg length, fusion penetration, throat thickness have been analyzed and confirmed based on the standards used in the auto body vehicle part company. The appropriate parameters for the finest welding shape are defined at the horizontal position using an electric current of 120 A and the welding voltage of 18 V (± 1 V). Thus, the measurement control of macrostructure is defined as reference parameters for mass production of cross member backbone assembly.

Effectiveness of aluminizing in machine construction

1968 ◽  
Vol 10 (5) ◽  
pp. 406-409
Author(s):  
O. I. Yudina ◽  
O. I. Inokova ◽  
L. L. Pyatakova ◽  
A. P. Shitov ◽  
G. P. Kreshtakova ◽  
...  
Keyword(s):  
Machine Construction

scholarly journals Damping in magnetorheological elastomers under compressive stress

2019 ◽  
Vol 254 ◽  
pp. 06002 ◽  
Author(s):  
Mateusz Kukla ◽  
Krzysztof Talaśka ◽  
Ireneusz Malujda
Keyword(s):  
Smart Materials ◽  
Hysteresis Loops ◽  
Machine Construction ◽  
Vibration Absorbers ◽  
Magnetorheological Elastomers ◽  
Practical Applications ◽  
Mechanical Hysteresis ◽  
Compressive Stresses ◽  
Active Vibration ◽  
Energy Absorbers

Magnetorheological elastomers are an important area of study in non-classical engineering materials. These are smart materials, in which some of the physical properties are dependent on the applied magnetic field. This unique property allows to suggest new, innovative practical applications. It is therefore relevant to carry out studies in the possible application of magnetorheological elastomers in machine construction. The present article presents the results of study regarding the properties of the discussed materials subject to compressive stresses. Particular attention is given to the observed growth of surface area of mechanical hysteresis loops, which is evidence of the possibility to change the damping properties of magnetorheological elastomers. This property can be utilized in the construction of different types of machines and devices. These mostly applies to energy absorbers such as active vibration absorbers.

scholarly journals Growth in Baumslag–Solitar groups I: subgroups and rationality

2011 ◽  
Vol 14 ◽  
pp. 34-71 ◽  
Author(s):  
Eric M. Freden ◽  
Teresa Knudson ◽  
Jennifer Schofield
Keyword(s):  
Turing Machine ◽  
Time Complexity ◽  
Machine Construction ◽  
Convolution Product ◽  
Growth Series ◽  
Context Sensitive ◽  
Context Free Language ◽  
Time And Space Complexity ◽  
Context Free ◽  
Free Language

AbstractThe computation of growth series for the higher Baumslag–Solitar groups is an open problem first posed by de la Harpe and Grigorchuk. We study the growth of the horocyclic subgroup as the key to the overall growth of these Baumslag–Solitar groups BS(p,q), where 1<p<q. In fact, the overall growth series can be represented as a modified convolution product with one of the factors being based on the series for the horocyclic subgroup. We exhibit two distinct algorithms that compute the growth of the horocyclic subgroup and discuss the time and space complexity of these algorithms. We show that when p divides q, the horocyclic subgroup has a geodesic combing whose words form a context-free (in fact, one-counter) language. A theorem of Chomsky–Schützenberger allows us to compute the growth series for this subgroup, which is rational. When p does not divide q, we show that no geodesic combing for the horocyclic subgroup forms a context-free language, although there is a context-sensitive geodesic combing. We exhibit a specific linearly bounded Turing machine that accepts this language (with quadratic time complexity) in the case of BS(2,3) and outline the Turing machine construction in the general case.

Role of Gauges in Modern Machine Construction

2014 ◽  
Vol 56 (11) ◽  
pp. 1261-1262
Author(s):  
M. I. Etingof
Keyword(s):  
Machine Construction ◽  
Modern Machine
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