Optimal heat induction treatment of titanium alloys

2020 ◽  
Vol 39 (1) ◽  
pp. 53-65
Author(s):  
Ivan Alexandrovich Smolyanov ◽  
Václav Kotlan ◽  
Ivo Doležel
Keyword(s):  
Heat Treatment ◽  
Control System ◽  
Titanium Alloys ◽  
Temperature Drop ◽  
Industrial Plant ◽  
Induction Treatment ◽  
Temperature Uniformity ◽  
Content Type ◽  
Titanium Alloy Ti6al4v

Purpose This paper aims to propose a number of approaches to reduce the temperature gradient of titanium billets in the heat treatment process. Design/methodology/approach Modeling physical processes in the induction unit is calculated by the finite element method. Required power was calculated based on the fact that all the induced power is allocated in a certain layer and there are loss flows and heating flows. Also, an opportunity is offered to reduce temperature difference using numerical optimization, control system based on proportional-integral regulator and ballast blank. Findings The asymmetry of the magnetic field at the ends of the inductor significantly affects the temperature uniformity along the length of the workpiece. Increasing the length of the workpiece by adding ballast blanks reduces the temperature drop. Also, increasing the non-magnetic gap in some cases it is possible to improve the quality of through heating. Research limitations/implications The results of this study are verified only for a number of titanium alloys. Therefore, this knowledge is appropriate to apply for this type of materials. In future studies, it is possible to expand the possibilities of the considered approaches for other types of materials. Practical implications Part of the study will be used to industrial plant for purpose of heat treatment of titanium alloys workpiece. Especially, control system will be basically made based on the model. Originality/value A novel methodology of induction heating of titanium alloy Ti6Al4V in the form of cylindrical billets is presented that simplifies the process and improves temperature uniformity along the radius and length of the billet by optimizing the shape of the inductor and selecting suitable power modes.

Co-designed of network scheduling and sliding mode control for underwater shuttle based on adaptive genetic algorithm

2018 ◽  
Vol 38 (5) ◽  
pp. 635-644 ◽  
Author(s):  
Zeyu Li ◽  
Weidong Liu ◽  
Le Li ◽  
Zhi Liu ◽  
Feihu Zhang
Keyword(s):  
Genetic Algorithm ◽  
Control System ◽  
Time Delay ◽  
Sliding Mode ◽  
Transmission Time ◽  
Adaptive Genetic Algorithm ◽  
Control Performance ◽  
Network Scheduling ◽  
Content Type

Purpose Underwater shuttle is widely used in scenarios of deep sea transportation and observation. As messages are transmitted via the limited network, high transmission time-delay often leads to information congestion, worse control performance and even system crash. Moreover, due to the nonlinear issues with respect to shuttle’s heading motion, the delayed transmission also brings extra challenges. Hence, this paper aims to propose a co-designed method, for the purpose of network scheduling and motion controlling. Design/methodology/approach First, the message transmission scheduling is modeled as an optimization problem via adaptive genetic algorithm. The initial transmission time and the genetic operators are jointly encoded and adjusted to balance the payload in network. Then, the heading dynamic model is compensated for the delayed transmission, in which the parameters are unknown. Therefore, the adaptive sliding mode controller is designed to online estimate the parameters, for enhancing control precision and anti-interference ability. Finally, the method is evaluated by simulation. Findings The messages in network are well scheduled and the time delay is thus reduced, which increases the quality of service in network. The unknown parameters are estimated online, and the quality of control is enhanced. The control performance of the shuttle control system is thus increased. Originality/value The paper is the first to apply co-design method of message scheduling and attitude controlling for the underwater unmanned vehicle, which enhaces the control performance of the network control system.

Search optimal control of induction heating modes for a moving workpiece

2020 ◽  
Vol 39 (1) ◽  
pp. 81-89
Author(s):  
Ivan Alexandrovich Smolyanov ◽  
Fedor Tarasov
Keyword(s):  
Control System ◽  
Mathematical Models ◽  
Induction Heating ◽  
Management Theory ◽  
Electrical Heating ◽  
Industrial Plant ◽  
Control Algorithms ◽  
Content Type ◽  
Distributed Parameters ◽  
Object Management

Purpose This paper aims to create mathematical models and control algorithms allowing the authors to study and form effective modes of operation of multi-inductor system of electrical heating of moving hollow cylindrical blanks. Design/methodology/approach The developed mathematical models were based on the finite-difference method, the control volume method and their combination. The reliability of the results obtained was verified by comparing the calculated results with the experimental ones. The temperature control system was synthesized using methods of the object management theory with distributed parameters. Findings A set of mathematical instruments has been created that allow modelling the operation modes of installation for induction heating of moving hollow cylindrical blanks. Recommendations were given on the formation of an automatic control system that provides heating of a moving hollow cylindrical billet to the required temperature with simultaneous equalization of temperature along the length of the billet in case of highly uneven initial temperature along the length of the billet. Practical implications Part of the paper will be used by the industrial plant for the purpose of heat treatment of iron alloys workpiece. Particularly, a control system will be basically formed based on the models. Originality/value The scientific novelty of the paper is to create control algorithms and mathematical models for the induction heating system of tubular workpieces allowing to explore interrelated electromagnetic and thermal processes taking into account nonlinearities and design features of the system, as well as to form effective modes of its operation based on transfer functions and methods of the object management theory with distributed parameters.

scholarly journals The Quality of Welded Connections Elements from the Steel 30HGS and Titanium Alloy Ti6Al4V

2012 ◽  
Vol 12 (2) ◽  
pp. 159-166
Author(s):  
Z. Łapiński ◽  
A. Dziedzic ◽  
W. Bochnowski ◽  
S. Adamiak ◽  
S. Sandomierski
Keyword(s):  
Heat Treatment ◽  
Titanium Alloy ◽  
Good Condition ◽  
Influence Zone ◽  
Ti6al4v Titanium Alloy ◽  
Titanium Alloy Ti6al4v ◽  
Partial Division

The Quality of Welded Connections Elements from the Steel 30HGS and Titanium Alloy Ti6Al4V The aim of that work was the evaluation of the quality of welded connections elements (welds) from the 30HGS steel and titanium alloy Ti6Al4V. The metallographic, factographic tests were used, and measurements of microhardness with the Vickers method. In the head weld of the 30HGS steel there were non-metallic partial division and bubbles observed. The average microhardness in the head connection was 320 HV0.1. There was no significant increase/decrease observed of microhardness in the head influence zone of the weld. There was a good condition of head connections observed, in accordance with the standard EN12517 and EN25817. In the head weld of Ti6Al4V titanium alloy there were single, occasional non-metallic interjections and bubbles observed. There were no cracks both on the weld, and on the border of the heat influence zone. The value of microhardness in head connection was in the range 300÷445 HV0.1. Reveal a very good condition of the head connections in accordance with the standard EN12517 and EN25817. The factographic tests prove the correctness of welded connections done and then heat treatment in case of steel and titanium alloy.

A coiling robot for elevator compensation chain

2016 ◽  
Vol 43 (4) ◽  
pp. 403-408
Author(s):  
Xianchuan Shi ◽  
Liang Gao ◽  
Lei Qian ◽  
Mingya Cheng ◽  
Kyle Jiang
Keyword(s):  
Control System ◽  
Servo Control ◽  
Original Position ◽  
Content Type ◽  
Servo Control System ◽  
And Control ◽  
System Designs ◽  
Practical Implications ◽  
Analog Output

Purpose The purpose of this paper is to develop a coiling robot in the production of coated elevator compensation chains to replace the manual coiling operations and improve the quality of compensation chains. Design/methodology/approach This paper introduces both mechanical and servo control system designs of the coiling robot. The structure of two friction wheels stabilizes the conveying speed of compensation chain, so the chain speed matches with the car speed. A centering mechanism pushes the chain to its original position. Seven servo motors are integrated into the system, and they are controlled by a servo control system based on programmable logic controller, positioning controller, analog output block and touch screen. Findings The results of the project show that the coiling robot can both greatly reduce the number of workers and the intensity of the work and improve the quality of the chain. The chain lid by the robot is not only neat, but also uniform in its inner stress. Research limitations/implications When the output speed of the compensation chain from the rear friction wheel does not match the coiling speed, the coiling operation has to be halted. Then, the operator adjusts the chain speed and restarts the coiling operation. Practical implications The coiling robot is proven working. It has been adopted by a leading company manufacturing compensation chains. Originality/value This is the first coiling robot which is practically used in a production line of compensation chains. Its design, mechanism and control systems are of great reference values to people.

scholarly journals Perancangan Sistem Kontrol dan Monitoring Kualitas Air dan Suhu Air Pada Kolam Budidaya Ikan

2018 ◽  
Vol 7 (1) ◽  
pp. 13-23 ◽  
Author(s):  
Rozeff Pramana
Keyword(s):  
Water Quality ◽  
Control System ◽  
Real Time ◽  
Temperature Sensor ◽  
Temperature Drop ◽  
Pond Water ◽  
Web Based ◽  
Sensor Reading ◽  
Sensor Temperature

The quality and the temperature of pond water is an important parameter that need to get attention in fish cultivation. Every type of fish has their own characteristic towards water condition and pond temperature. The monitoring of water quality in cultivation pond is done manually and it takes a lot of time. The purpose of this research is to design web-based control system device and monitoring the quality of the water of fish cultivation pond including salinity, temperature and the hardness in real time using special application. This device design consists of salinity sensor, hardness sensor, and temperature sensor. Temperature can be controlled and monitored automatically on the application via computer/laptop. The result of this research is temperature drop by 0,1 oC on a 10 liters pond that takes 18 seconds, and to decrease the temperature of 1 oC takes 180 seconds (3 minutes). To raise the temperature of 0,1 oC takes 264 seconds or 4,4 minutes, and to raise the temperature of 1 oC takes 2640 seconds or 44 minutes. The percentage of error for sensor reading is ranged 2,4% - 3,9%.

Two improved scanning path planning algorithms and a 3D printing control system with circular motion controller

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Dier Wang ◽  
Jun Zhang
Keyword(s):  
Control System ◽  
3D Printing ◽  
Optimization Method ◽  
Orthogonal Decomposition ◽  
Circular Motion ◽  
Motion Controller ◽  
Content Type ◽  
Scanning Path ◽  
Scanning Path Planning

Purpose This paper aims to improve the infilling efficiency and the quality of parts forming. It proposes two improved scanning path planning algorithm based on velocity orthogonal decomposition. Design/methodology/approach The algorithms this paper proposes replace empty paths and corners with circular segments, driving each axis synchronously according to the SIN or COS velocity curve to make the extruder always moves at a constant speed at maximum during the infilling process. Also, to support the improved algorithms, a three-dimensional (3D) printing control system based on circular motion controller is also designed. Findings The simulation and experiment results show that the improved algorithms are effective, and the printing time is shortened more significantly, especially in the case of small or complex models. What’s more, the optimized algorithm is not only compact in shape but also not obvious in edge warping. Research limitations/implications The algorithms in this paper are not applicable to traditional motion controllers. Practical implications The algorithms in this paper improve the infilling efficiency and the quality of parts forming. Social implications There are no social implications in this paper. Originality/value The specific optimization method of parallel-line scanning algorithm based on velocity orthogonal decomposition is replacing the empty paths with arc corners. And the specific optimization method of contour offsetting algorithm based on velocity orthogonal decomposition is to add connection paths between adjacent contours and turn all straight corners into arcs. What’s more, the 3D printing control system based on the circular motion controller can achieve multi-axis parallel motion to support these two improved path scanning algorithms.

Pengaruh Kualitas Sumber Daya Manusia, Pemanfaatan Teknologi Informasi, Dan Sistem Pengendalian Intern Terhadap Ketepatwaktuan Pelaporan Keuangan Pemerintah Desa

2018 ◽  
Vol 26 (2) ◽  
pp. 131-143
Author(s):  
Marlinawati Marlinawati ◽  
Dewi Kusuma Wardani
Keyword(s):  
Information Technology ◽  
Control System ◽  
Human Resources ◽  
Financial Reporting ◽  
Internal Control ◽  
Positive Influence ◽  
Internal Control System ◽  
Speed Up ◽  
Village Government

The purpose of this research is to know the influence between the Quality of Human Resources, Utilization of Information Technology and Internal Control System Against Timeliness of Village Government Financial Reporting at Gunungkidul Regency. This research is causative research. The population is the village government in Gunungkidul Regency, especially in Gedangsari subdistrict. Criteria of respondents in the study were to village and village apparatus. We use questionnaire to collect data. We use multiple regression with SPSS program version 16.0 to analyze data. We find that quality of human resources and internal control system have a positive influence on the timeliness of village government financial reporting. On the other hand, utilization of information technology does not influence the timeliness of village government financial reporting. These imply that the quality of human resources and internal control system can speed up the preparation of village government financial reporting.

DESIGN, SIMULATION AND IMPLEMENTATION MONITORING SYSTEM FOR SYSTEM CONTROL C4 FEEDING PUMP FOR FEED VAPORIZATION IN THE BUTADIENE PLANT

2020 ◽  
Vol 1 (1) ◽  
pp. 31-35
Author(s):  
Fahmi Yunistyawan ◽  
Yunistyawan J Berchmans ◽  
Gembong Baskoro
Keyword(s):  
Motor Control ◽  
Control System ◽  
Field Operator ◽  
System Control ◽  
Variable Speed ◽  
Variable Speed Drive ◽  
Software And Hardware ◽  
Discharge Pressure ◽  
Selection Of

This study implements the auto start control system on an electric motor 3 phase C4Feeding pump when the discharge pressure is low-low (4.3 kg /cm²). The C4 feeding pumpmotor was initially manually operated from the local control station, this was very ineffectiveand inefficient because it still relied on the field operator to operate the pump motor and whenthe plant was in normal operating it is very risk if the field operator late to operate motor then itwill impact to quality of the product, and if the delay time to operate motor is too long then planthave to shut down, therefore improvement is needed in the C4 feeding pump motor controlsystem. In this paper, various types of 3-phase motor control are explained which allow it to beapplied to the C4 feeding pump motor that are on-off, inverter, and variable speed drive andefficient selection of the three systems control of the motor. Software and hardware used in thisthesis work are DCS CENTUM VP Yokogawa.

The Development of Recommendations for Machinability of Ti-6Al-4V Titanium Alloys by Optimizing the Heat Treatment Modes

2018 ◽  
Vol 12 (9) ◽  
pp. 771
Author(s):  
Yuliia Borisovna Egorova ◽  
Liudmila Vasilevna Davydenko ◽  
Evgeniy Nikolaevich Egorov ◽  
Evgeniy Valeryevna Chibisova
Keyword(s):  
Heat Treatment ◽  
Titanium Alloys

Hydrogen diffusion kinetics under different conditions applied to VT6 alloy

2020 ◽  
pp. 98-107
Author(s):  
E. I. Maslikova ◽  
V. D. Andreeva ◽  
E. L. Alekseeva ◽  
Yu. A. Yakovlev
Keyword(s):  
Heat Treatment ◽  
Oxide Film ◽  
Titanium Alloys ◽  
Hydrogen Diffusion ◽  
Heat Treating ◽  
Protective Atmosphere ◽  
Diffusion Kinetics ◽  
Hydrogen Charging ◽  
Hydride Formation ◽  
Different Types

Research of hydrogen diffusion in VT6 alloy is carried out considering different types of heat treating and hydrogen charging. The influence of microalloying on the susceptibility to hydride formation and embrittlement of titanium alloys is analyzed, and also effects of an oxide film on hydrogen charging during heat treatment without protective atmosphere, are studied.

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