Adaptation of Control System for 3D Printing Device with the Use of Hot Gas Powder Sintering

2013 ◽  
Vol 282 ◽  
pp. 242-245 ◽  
Author(s):  
Staš Ondrej ◽  
Ernest Gondár ◽  
Marian Tolnay ◽  
Peter Surový
Keyword(s):  
Control System ◽  
3D Printing ◽  
Control Program ◽  
Positioning System ◽  
Printing Process ◽  
Hot Gas ◽  
Powder Sintering ◽  
Program Flow ◽  
Printing System ◽  
Material Volume

The article explains adaptation of control system for 3D printing device with the use of hot gas powder sintering. The work especially focuses on the use of special powder sintering, where the properties of powder material are unstable, or the printing process has to adapt the change of material volume during printing process. The main principles or main peculiarities of this system are explained, where positioning system is reacting on the material properties by algorithms creating change of control program flow of printing system generated from CAM processors.

scholarly journals Automation control system of 3d printing robotic platform with implemented wire + arc welding technology

2020 ◽  
pp. 35-48
Author(s):  
P.S. Anikin ◽  
G.M. Shilo ◽  
R.A. Kulykovskyi ◽  
D.E. Molochkov
Keyword(s):  
Control System ◽  
Additive Manufacturing ◽  
3D Printing ◽  
System Architecture ◽  
Control Program ◽  
Thermal Mode ◽  
Robotic Platform ◽  
Automated Control ◽  
Automated Control System ◽  
Control System Architecture

Purpose. Development of the robotic platform automated control system architecture, development of the software control algorithm. Methodology. To implement the algorithm of the control program, computer modeling of thermal regimes in CAE systems is used. The basic parameters of the single layer printing technique were obtained by experimental use of the wire plus arc additive manufacturing (WAAM) technology. Findings. Requirements for manufacturability and printing quality of the manufactured parts were defined in the form of geometric dimensions, surface waviness, parameters of the desired microstructure state, residual stresses, maintaining of the optimal manufacturing speed. Based on the requirements of manufacturability analysis, an algorithm for the control program was developed. Robotic platform automated control system architecture with feedback device for the thermal mode control, parameters of the geometrical form of the manufactured part and weld pool were developed. Three -level hierarchical model, which gives an ability to consider in the process of 3D printing each level individually in terms of welding bead, layer and wall, was developed. The input data for the operation of the automated control system of the robotic platform using the technology of electric arc welding are determined.  Basic geometrical parameters and the simple welding bead and the methods of overlapping of two or more beads were shown. Critical differences between ideal and real welding overlapping models were considered for necessity of taking into account whilst generating robot control software. Analysis of the possibilities for the CAE simulation of the three-dimensional printing using wire plus arc additive manufacturing technology is performed  to determine the influence of the temperature parameters, mechanical loads, toolpath change, and based on the data obtained, it became possible to determine residual stresses and defects in manufactured parts.  Originality.  Robotic platform automated control system architecture with feedback device for the control of thermal mode, parameters of the geometrical form of the manufactured part and weld pool was developed. Three-level hierarchical model for the wire plus arc additive manufacturing (WAAM) technology was created. Software control algorithm which provides an opportunity to improve geometrical and mechanical properties of the manufactured parts was developed. Practical value. Development of an automated control system for 3D printing robotic platform with WAAM implemented technology, which will provide an opportunity for increase in the printing accuracy of the manufactured parts and will help to reduce manufacturing time.

Application of Hot Gas Powder Sintering in Robotics

2014 ◽  
Vol 613 ◽  
pp. 386-389
Author(s):  
Staš Ondrej ◽  
Ernest Gondár ◽  
Marek Martančík ◽  
Mário Buranský
Keyword(s):  
Rapid Prototyping ◽  
Production Technology ◽  
New Technology ◽  
Inert Gas ◽  
Material Structure ◽  
Positioning System ◽  
Special Equipment ◽  
Hot Gas ◽  
Powder Sintering ◽  
Potential Possibility

The work describes the application of hot gas powder sintering using robotic positioning system with special equipment, designed for this new way of manufacturing technology. Material used for this type of sintering is recycled dust portion of PET plastics, which proposes potential possibility of costs reduction for this kind of production technology, which is focused on the use unusable materials. This opens new potential trends in robotics application, even in a new technology, suitable for rapid prototyping in mechanical engineering. It is sintering of the plastics powder using hot gas, usually nitrogen or any inert gas, to propose the best material structure without any deformation.

scholarly journals Design and Implementation of 3D Printing System for Continuous CFRP Composites

2018 ◽  
Vol 213 ◽  
pp. 01011 ◽  
Author(s):  
Ningda Han ◽  
Jun Cheng ◽  
Jiquan Yang ◽  
Yijian Liu ◽  
Wuyun Huang
Keyword(s):  
Carbon Fiber ◽  
3D Printing ◽  
Three Dimensional ◽  
Printing Technology ◽  
Printing Process ◽  
Three Dimensional Printing ◽  
Cfrp Composites ◽  
Continuous Carbon Fiber ◽  
Printing System ◽  
Dimensional Printing

The rapid and low-cost manufacturing of continuous Carbon Fiber Reinforced Polymer (CFRP) composites using 3D printing technology is a hot topic in the field of composite materials’ research. Due to the continuity and infusibility of the long carbon fiber, a series of problems such as loosening of fiber, breakage, and nozzle clogging occurred in the printing process, which result in poor surface quality and performance in the printed product. This paper aims to solve these problems based on the researches and optimizations of three-dimensional printing technology for continuous CFRP composite components. Firstly, the coupling mechanism of continuous fiber and resin polymer in the flow path of nozzle is analyzed, the finite element simulation models of flow field and temperature field of CFRP three-dimensional printing are established by using ANSYS CFX software, and the coupling characteristics and interface performance in the printing process are studied. Then, based on the results of simulation analysis, a modification method of the surface coating film is applied, and a special modification solution is configured to modify the surface of the carbon fiber so as to increase its strength and bondability with the molten resin. Finally, the mechanical structure of the three-dimensional printing system of continuous CFRP components is designed to achieve the synchronization of printing and fiber modification. Considering the continuity of continuous carbon fiber, this paper proposed a new method of printing path design called “unicursal” for continuous CFRP parts, that is, when designing and planning a three-dimensional print path, it ensured that there is no interruption in the printing process, so as to achieve carbon fiber continuity in composite parts. The reliability and superiority of the printing system designed in this paper are confirmed by printing of the composite parts.

Commissioning brownstock washing controls for an evaporator limited mill

TAPPI Journal ◽  
2016 ◽  
Vol 15 (7) ◽  
pp. 459-464
Author(s):  
RICARDO SANTOS ◽  
PETER HART
Keyword(s):  
Control System ◽  
Negative Impact ◽  
Black Liquor ◽  
Pulp Mill ◽  
Control Program ◽  
Separation Point ◽  
Water Control ◽  
Oxygen Delignification ◽  
Percentage Points

An automated shower water control system has been implemented to reduce the volume and variability of weak black liquor being sent from the pulp mill to the evaporators. The washing controls attempt to balance the need for consistent and low soda carryover to the bleach plant with consistently high weak black liquor solids being sent to the evaporators. The washer controls were implemented on two bleachable grade hardwood lines (one with oxygen delignification, one without oxygen delignification) and one pine line. Implementation of the control program resulted in an increase in black liquor solids of 0.6 percentage points for the hardwood lines. Significant foam reduction was realized on the pine line since the pine black liquor solids were able to be consistently maintained just below the soap separation point. Low black liquor solids excursions to the evaporators were eliminated. Bleach plant carryover was stabilized and no negative impact on chemical consumption was noticed when controlling weak black liquor solids to recovery.

Influence of Constructive and Technological Parameters at Generated Spiral Parts with DLP 3D Printing Process

2019 ◽  
Vol 56 (4) ◽  
pp. 801-811
Author(s):  
Mircea Dorin Vasilescu
Keyword(s):  
3D Printing ◽  
Great Influence ◽  
Polymerization Process ◽  
Generation Process ◽  
Technological Parameters ◽  
Printing Process ◽  
The Third ◽  
Solid Models ◽  
Specific Factors ◽  
Printing Processes

This work are made for determine the possibility of generating the specific parts of a threaded assembly. If aspects of CAD generating specific elements was analysed over time in several works, the technological aspects of making components by printing processes 3D through optical polymerization process is less studied. Generating the threaded appeared as a necessity for the reconditioning technology or made components of the processing machines. To determine the technological aspects of 3D printing are arranged to achieve specific factors of the technological process, but also from the specific elements of a trapezoidal thread or spiral for translate granular material in supply process are determined experimentally. In the first part analyses the constructive generation process of a spiral element. In the second part are identified the specific aspects that can generation influence on the process of realization by 3D DLP printing of the two studied elements. The third part is affected to printing and determining the dimensions of the analysed components. We will determine the specific value that can influence the process of making them in rapport with printing process. The last part is affected by the conclusions. It can be noticed that both the orientation and the precision of generating solid models have a great influence on the made parts.

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