scholarly journals Study of Availability and Productivity of Automated Lines

2021 ◽  
Vol 8 (1) ◽  
pp. 144-153
Author(s):  
A. M. Ahmed Alwaise ◽  
Omer Haitham Kanam
Keyword(s):  
Mechanical Parameters ◽  
Technical Data ◽  
Main Index ◽  
Productivity Rate ◽  
Automated Lines ◽  
Manufacturing Machine

In area of manufacturing, the indices of each manufacturing machine are the productivity and goodness of products. The theory of reliability is closely related to Indices of productivity, the both theories the efficiency of machines, and optimizations one. The reliability of machines has been guessed by standard indices of the theory of reliability. The main index of reliability of every manufacturing machine is its availability. However, indicated the reliability of industrial machines with complicate design have not expressed in equations of the productivity. These indices of accuracy should be a component of equations of a productivity of a machine and reflects changes of a productivity rate one on changes of indices of reliability and mechanical parameters of a machine. The availability has been included the equations of the machines productivity rate, therefore the reliability of machines is the integrated indication. The machines reliability with complicate design such as automated lines relies also on construction and technical data. The output modelling has been reported the output result with availability for the automated lines, defining their structures according to the grade of reliability and productivity as a task of technical motif of manufacturing machines with complex designs.

Productivity rate of rotor-type automated lines and optimization of their structure

2008 ◽  
Vol 222 (11) ◽  
pp. 1561-1566 ◽  
Author(s):  
R Usubamatov ◽  
M Z Abdulmuin ◽  
A M Nor ◽  
M N Murad
Keyword(s):  
Analytical Approach ◽  
Automatic Machine ◽  
Rate Data ◽  
Production Lines ◽  
Sequential Action ◽  
Technical Parameters ◽  
Productivity Rate ◽  
Analytical Approaches ◽  
Automated Lines ◽  
Rotor Type

Rotor-type production lines are used in many areas of industry. Existing analytical approaches that utilize productivity rate data of the rotor-type lines do not reflect reliable technical parameters. This paper presents a new analytical approach for calculating the productivity rate of a rotor-type automatic machine and automated lines with parallel—sequential action and optimization of its structure as a number of serial and parallel stations using the criterion of maximal productivity rate.

Mathematical Models for Productivity Rate of Automated Lines with Reliability Attributes of Mechanisms

2014 ◽  
Vol 695 ◽  
pp. 521-525
Author(s):  
Ryspek Usubamatov ◽  
Tan Chan Sin
Keyword(s):  
Mathematical Models ◽  
Technological Process ◽  
Analytical Approach ◽  
High Accuracy ◽  
Complex Structures ◽  
Processing Times ◽  
Productivity Rate ◽  
Automated Lines ◽  
Different Levels ◽  
Approximate Equations

Automated lines with complex structures consist of stations and mechanisms with different levels of reliability. Most publications that present the mathematical models for productivity of automated lines are based on simplifications to derive the approximate equations of productivity. Simplification is based on the premise that all stations of the automated lines have one level of reliability, and balancing of technological process on stations is conducted evenly, etc. However, manufacturers need correct and clear mathematical models to enable the calculation of the productivity of the automated lines with high accuracy. This paper presents the analytical approach to the productivity rate of the automated lines with stations and mechanisms, with different failure rates, and processing times. The proposed mathematical models allow for the output of automated lines to be modelled with results that are close to actual productivity.

Productivity Theory for Industrial Automated Lines

2013 ◽  
Author(s):  
Ryspek Usubamatov ◽  
Tan Chan Sin ◽  
Mohd Fidzwan B. Md. Amin Hamzas
Keyword(s):  
Mathematical Models ◽  
Failure Rates ◽  
Industrial Systems ◽  
Technical Parameters ◽  
Processing Times ◽  
Productivity Rate ◽  
Productivity Theory ◽  
Automated Line ◽  
Automated Lines ◽  
Parallel Action

The basic attributes of any industrial machines and systems are productivity rate and quality of products. Attributes of productivity are related to the theory of reliability let alone the theory of efficiency of machines. Publications in area of productivity of the industrial systems enable to write the productivity theory for the industrial machines and systems. This theory shows the links between productivity, reliability, technological and technical parameters and the structure of machines with complex designs. Automated production lines are considered industrial systems for the collection of serial and parallel stations arranged according to a certain structure that depends on a technological process of machining parts. Manufacturers require correct and clear mathematical models to calculate the productivity of the automated lines with high accuracy. The mathematical models for productivity rate of industrial systems with complex design define their structures according to the level of output. This paper presents an analytical approach to the productivity rate of automated lines with stations and mechanisms that display different failure rates and processing times. The typical designs of industrial automated lines are considered by three types of structure: multi-station ’s automated line of serial, parallel action and serial-parallel action. All designs can be presented using linear, circular and rotary arrangements. The analytical equations allow for the output of the automated lines to be modeled with different failure rates for the stations and mechanisms yielding results close to the actual productivity values.

Analysis of Efficiency of Drilling of Large-Diameter Wells With a Profiled Wing Bit / Badania Efektywności Wiercenia Studni Wielkośrednicowych Świdrem Skrawającym z Profilowanymi Skrzydłami

2012 ◽  
Vol 57 (2) ◽  
pp. 363-373
Author(s):  
Jan Macuda
Keyword(s):  
Average Rate ◽  
Large Diameter ◽  
Open Pit ◽  
Mechanical Parameters ◽  
Drilling Rate ◽  
Geological Conditions ◽  
Rock Drillability ◽  
Drilling Technology ◽  
Weight On Bit ◽  
Rotary Speed

Abstract In Poland all lignite mines are dewatered with the use of large-diameter wells. Drilling of such wells is inefficient owing to the presence of loose Quaternary and Tertiary material and considerable dewatering of rock mass within the open pit area. Difficult geological conditions significantly elongate the time in which large-diameter dewatering wells are drilled, and various drilling complications and break-downs related to the caving may occur. Obtaining higher drilling rates in large-diameter wells can be achieved only when new cutter bits designs are worked out and rock drillability tests performed for optimum mechanical parameters of drilling technology. Those tests were performed for a bit ø 1.16 m in separated macroscopically homogeneous layers of similar drillability. Depending on the designed thickness of the drilled layer, there were determined measurement sections from 0.2 to 1.0 m long, and each of the sections was drilled at constant rotary speed and weight on bit values. Prior to drillability tests, accounting for the technical characteristic of the rig and strength of the string and the cutter bit, there were established limitations for mechanical parameters of drilling technology: P ∈ (Pmin; Pmax) n ∈ (nmin; nmax) where: Pmin; Pmax - lowest and highest values of weight on bit, nmin; nmax - lowest and highest values of rotary speed of bit, For finding the dependence of the rate of penetration on weight on bit and rotary speed of bit various regression models have been analyzed. The most satisfactory results were obtained for the exponential model illustrating the influence of weight on bit and rotary speed of bit on drilling rate. The regression coefficients and statistical parameters prove the good fit of the model to measurement data, presented in tables 4-6. The average drilling rate for a cutter bit with profiled wings has been described with the form: Vśr= Z ·Pa· nb where: Vśr- average drilling rate, Z - drillability coefficient, P - weight on bit, n - rotary speed of bit, a - coefficient of influence of weight on bit on drilling rate, b - coefficient of influence of rotary speed of bit on drilling rate. Industrial tests were performed for assessing the efficiency of drilling of large-diameter wells with a cutter bit having profiled wings ø 1.16 m according to elaborated model of average rate of drilling. The obtained values of average rate of drilling during industrial tests ranged from 8.33×10-4 to 1.94×10-3 m/s and were higher than the ones obtained so far, i.e. from 181.21 to 262.11%.

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