scholarly journals Analysis of error influence in tooth direction upon combined cog-wheels accuracy

2016 ◽  
Vol 1 (6) ◽  
pp. 17-21
Author(s):  
Александр Черепахин ◽  
Aleksandr Cherepakhin ◽  
Алексей Хоров ◽  
Aleksey Khorov
Keyword(s):  
Ring Gear ◽  
Threaded Joint ◽  
Kinematic Accuracy ◽  
Joint Tightening ◽  
Analysis Of Error

The solution of a problem in multi-range of cylindrical cog-wheels is in the use of banded wheels. One of the significant problems of banded wheels consists in decrease of their accuracy at assemblage. In the paper there is considered the influence of torque oscillation at threaded joint tightening upon a bend of a ring gear, and finally upon its accuracy. In the paper it is shown that the application of mechanized (pneumatic) nut-runners results in: an increase of kinematic accuracy values and smoothness of operation of an assembled cog-wheel and lose of a ring gear not less than for one degree. In the paper the attention is drawn of manufacturers to the necessity of the application of more accurate automated nut-runners and to the certification of a ring gear not only after processing, but also after assembling.

Metrologic theory for threaded joint tightening devices

1992 ◽  
Vol 35 (4) ◽  
pp. 515-516
Author(s):  
S. I. Zhbyr' ◽  
L. G. Palei
Keyword(s):  
Threaded Joint ◽  
Joint Tightening

Application of Frequency Method for Defining Threaded Joint Tightening Degree

2006 ◽  
Vol 113 ◽  
pp. 277-280
Author(s):  
Vytautas Kazimieras Augustaitis ◽  
Vytautas Bučinskas ◽  
V. Pauža
Keyword(s):  
Transient Process ◽  
Internal Combustion Engines ◽  
Dynamic Properties ◽  
Contact Stiffness ◽  
Frequency Method ◽  
Threaded Joint ◽  
Resonance Frequencies ◽  
Threaded Joints ◽  
Joint Tightening ◽  
Computer Card

There is a big variety of machines and equipment – internal combustion engines, aviation parts, building frames - joined by threaded joints, realized as bolt, nut and pin ones. For successful and safe exploitation of such equipment, it is required to check the tightening degree of threaded joints. There are few known methods of such control and one is presented in this paper. The proposed method is based on contact stiffness and friction change from thread tightening degree. At the same time, tightening changes with sufficient significance the dynamical properties of such a system - natural and resonance frequencies, amplitude – frequency and amplitude-phase characteristics, so, that it is possible to evaluate the tightening degree of the investigated joint. Dynamic properties are defined by exciting transient process between bolt head and tightened by this bolt detail using as short as possible force impact. Sensors register analogical signal of transient process and transmit it to a special computer card. The computer card converts analogical signal to code. Code is saved in the computer file for further processing. Processing data is saved in this file, and we find desired dynamical characteristics. Using special experimental bench proved that dynamic characteristics are sensitive enough to threaded joint tightening degree and the method is applicable to practice.

The performance analysis of error rate of IPTV transmitting system

2014 ◽  
Author(s):  
Yong Yang ◽  
Jia Guo ◽  
Yong Wang ◽  
Hongwei Ding ◽  
Qianlin Liu ◽  
...  
Keyword(s):  
Performance Analysis ◽  
Error Rate ◽  
Analysis Of Error

Calculation of the accuracy of a control head of a simplified design for dimensional control of parts

2020 ◽  
pp. 35-37
Author(s):  
Ya.L. Liberman ◽  
A.N. Mahiyanova ◽  
Gorbunova L.N.
Keyword(s):  
Size Control ◽  
Dimensional Control ◽  
Kinematic Accuracy ◽  
Measuring Probe

The metrological scheme of the control head of a simplified design is presented, its kinematic accuracy is analyzed. It is shown, that the effectiveness of the use of the head of this design, i.e., the accuracy of control, when controlling tolerances, in the manufacture of the part depends on the choice of the length of the measuring probe. Keywords part, size, control, measuring probe, kinematic accuracy, metrological scheme. [email protected]

scholarly journals Coconuts and curtain cakes: The production of wh-questions in ASD

2021 ◽  
Vol 6 ◽  
pp. 239694152098295
Author(s):  
Nufar Sukenik ◽  
Eléonore Morin ◽  
Naama Friedmann ◽  
Philippe Prevost ◽  
Laurice Tuller
Keyword(s):  
Error Analysis ◽  
Language Disorder ◽  
Syntactic Structure ◽  
Autism Spectrum ◽  
Production Rates ◽  
Fine Grained ◽  
Depth Analysis ◽  
Wh Questions ◽  
Analysis Of Error ◽  
Error Types

Background and aims Children with autism spectrum disorders (ASD) have been found to exhibit difficulties in wh-question production. It is unclear whether these difficulties are pragmatic or syntactic in nature. The current study used a question elicitation task to assess the production of subject and object wh-questions of children with ASD in two different languages (Hebrew and French) wherein the syntactic structure of wh-questions is different, a fact that may contribute to better understanding of the underlying deficits affecting wh-question production. Crucially, beyond the general correct/error rate we also performed an in-depth analysis of error types, comparing syntactic to pragmatic errors and comparing the distribution of errors in the ASD group to that of children with typical development (TD) and children with Developmental Language Disorder (DLD). Results Correct production rates were found to be similar for the ASD and DLD groups, but error analysis revealed important differences between the ASD groups in the two languages and the DLD group. The Hebrew- and French ASD groups were found to produce pragmatic errors, which were not found in children with DLD. The pragmatic errors were similar in the two ASD groups. Syntactic errors were affected by the structure of each language. Conclusions Our results have shown that although the two ASD groups come from different countries and speak different languages, the correct production rates and more importantly, the error types were very similar in the two ASD groups, and very different compared to TD children and children with DLD. Implications: Our results highlight the importance of creating research tasks that test different linguistic functions independently and strengthen the need for conducting fine-grained error analysis to differentiate between groups and gain insights into the deficits underlying each of them.

Duplex Spread Blade Method for Cutting Hypoid Gears with Modified Tooth Surface

1998 ◽  
Vol 120 (3) ◽  
pp. 441-447 ◽  
Author(s):  
K. Kawasaki ◽  
H. Tamura
Keyword(s):  
Cutting Edge ◽  
Tooth Surface ◽  
Radius Of Curvature ◽  
Large Radius ◽  
Ring Gear ◽  
Circular Arc ◽  
Hypoid Gears ◽  
Manufacturing Method ◽  
Straight Line

In this paper, a duplex spread blade method for cutting hypoid gears with modified tooth surface is proposed. The duplex spread blade method provides a rapid and economical manufacturing method because both the ring gear and pinion are cut by a spread blade method. In the proposed method, the nongenerated ring gear is manufactured with cutting edge that is altered from the usual straight line to a circular arc with a large radius of curvature and the circular arc cutting edge produces a modified tooth surface. The pinion is generated by a cutter with straight cutting edges as usual. The main procedure of this method is the determination of the cutter specifications and machine settings. The proposed method was validated by gear manufacture.

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