The quality of weld seams in tools in relation to tempering temperature

1969 ◽  
Vol 11 (8) ◽  
pp. 645-645
Author(s):  
N. D. Andreev
Keyword(s):  
Tempering Temperature ◽  
Weld Seams

Improving the tracking quality of the weld seam butt with V-form grooving by using Kalman filter and neural network

2021 ◽  
Author(s):  
Keyword(s):  
Neural Network ◽  
Kalman Filter ◽  
Colored Noise ◽  
Weld Seam ◽  
Vision Sensor ◽  
Laser Vision Sensor ◽  
Characteristic Points ◽  
Laser Vision ◽  
Weld Seams

An algorithm for tracking of the welded seams grooving by using a Kalman filter based on six characteristic points of the profile obtained using the RF627 laser vision sensor is proposed. In order to reduce the error in weld seams control, a multilayer neural network with a backpropagation algorithm is created to compensate for errors caused by colored noise when using the Kalman filter. Experimental results show that when the algorithm is applied, the error in tracking the trajectory of weld seams is reduced. Keywords tracking of weld seams; multilayer/multi-pass welding; Kalman filter; multilayer perceptron

Quality of weld seams produced with flux based on silicomanganese slag

2017 ◽  
Vol 47 (7) ◽  
pp. 440-444
Author(s):  
R. E. Kryukov ◽  
N. A. Kozyrev ◽  
O. D. Prokhorenko ◽  
L. P. Bashchenko ◽  
N. V. Kibko
Keyword(s):  
Silicomanganese Slag ◽  
Weld Seams

RADIOGRAPHIC TESTING BY COMPUTED RADIOGRAPHY (RT-CR) OF THE HELIUM INLET WELDS (HI) OF THE POLOIDAL FIELD COIL (PF1), PRODUCED BY JSC NIIEFA (SCIENTIFIC RESEARCH INSTITUTE OF ELECTROPHYSICAL APPARATUS) WITHIN THE FRAMEWORK OF THE INTERNATIONAL THERMONUCLEAR EXPERIMENTAL REACTOR (ITER) PROJECT

2019 ◽  
pp. 38-43
Author(s):  
K. A. Bagaev ◽  
T. M. Gurieva ◽  
A. A. Mednikov ◽  
I. Yu. Rodin ◽  
I. V. Sokolov
Keyword(s):  
Computed Radiography ◽  
Non Destructive Testing ◽  
Poloidal Field ◽  
Destructive Testing ◽  
Radiographic Testing ◽  
Imaging Plates ◽  
Non Destructive ◽  
Weld Seams ◽  
Iter Project

The manufacturing and non-destructive testing of the superconducting poloidal coil PF1 is one of the tasks of NIIEFA, the member of the international ITER project. Radiographic films were traditionally used for the purposes of radiation non-destructive testing. The technology of computed radiography was used to substitute films. It improved the quality of testing and increased productivity. Comparisons of testing results were carried out using films and imaging plates. The “Test Measurement for Qualification of Computed Radiography method for HI PF1 Weld Seams testing” was developed. It allowed to do testing using imaging plates without installing a duplex wire indicator. Compliance with the standards requirements for unsharpness is confirmed using certified specimens.

Development of an Ultrasonic Phased Array Testing System That Can Evaluate Quality of Weld Seam of High-Quality ERW Pipes

2012 ◽  
Author(s):  
Yutaka Matsui ◽  
Yukinori Iizuka ◽  
Masahito Suzuki ◽  
Eiichi Urahata ◽  
Tomohiro Inoue ◽  
...  
Keyword(s):  
Ultrasonic Testing ◽  
Phased Array ◽  
Weld Seam ◽  
Testing System ◽  
Beam Size ◽  
High Quality ◽  
Ultrasonic Phased Array ◽  
Weld Seams ◽  
Focused Beam

A high sensitivity ultrasonic testing system for inspection of the weld seam of ERW pipes was developed. The factors that affect the quality of the weld seam were investigated using an ultrasonic C-scan method with a focused probe and samples sliced from weld seams. As the result, it was found that a scattered-type penetrator consisting of micro oxides is a key factor in the quality of the weld seam. Absorbed energy in the Charpy impact test can be evaluated by the ultrasonic echo amplitude with the optimized focused beam size (about 1mm2) to detect the scattered-type penetrator. In order to evaluate the density of the scattered-type penetrator in weld seams with the optimum focused beam size for pipe, a point focused beam tandem method was developed by applying the ultrasonic phased array technique. The sensitivity of the developed method is 20dB higher for a standard artificial through drilled hole whose diameter is 1.6mm. A precise seam tracking system was also developed for application of the point focused beam tandem method to the actual ERW pipe manufacturing process. Since the allowance for applying the focused beam to the weld seam is very narrow, i.e., about 1mm, a circumference multi-point simultaneous receiving technique and thermal image-type seam detection technique were developed. The developed ultrasonic testing system has been in operation at the 24″ ERW mill at East Japan Works (Keihin District) of JFE Steel Corporation since March 2011. The combination of the ultrasonic testing system and an oxide control technique now contributes to production of high-performance, high-quality ERW pipe “Mighty Seam®” for use in frigid environments.

Effect of Thermal Assistance on the Joint Quality of Al6063-T5A During Flow Drill Screwdriving

2015 ◽  
Vol 137 (5) ◽  
Author(s):  
Jamie D. Skovron ◽  
R. Rohan Prasad ◽  
Durul Ulutan ◽  
Laine Mears ◽  
Duane Detwiler ◽  
...  
Keyword(s):  
Fuel Economy ◽  
Heat Affected Zone ◽  
Process Time ◽  
Tempering Temperature ◽  
Current Limitation ◽  
Thermomechanical Process ◽  
Joint Quality ◽  
Material Temperature ◽  
Installation Time

An increase in fuel economy standards has affected automakers' decision toward designing lightweight vehicles and therefore transitioning from steel-based bodies to ones predominantly composed of aluminum. An introduction to lightweight materials couples that of lightweight joining with a thermomechanical process, flow drill screwdriving (FDS). This process is favored in terms of robustness, short installation time, and only requiring access to one side. The current limitation with FDS occurs with the imposed 8.3 N·m maximum installation torque standardized for M5 self-tapping screws. Warm forming of aluminum has been shown to increase ductility and formability of the material, and thus a reduction in installation torque is sought after along with an expected decrease in process time. In this study, different preprocess material temperatures of Al6063-T5A are studied to determine the effect of material temperature on the process time, installation torque, and other joint measurables. As a result, with the thermal assistance, a reduction in the process time up to 52% and installation torque by 20% was attained. The increase in preprocess material temperature did not affect the hardness of the material outside of the minimal heat-affected zone, as the maximum preprocess material temperature did not exceed the tempering temperature.

scholarly journals The effect of the impurities spaces on the quality of structural steel working at variable loads

2020 ◽  
Vol 11 (1) ◽  
pp. 233-238
Author(s):  
Tomasz Lipiński ◽  
Robert Ulewicz
Keyword(s):  
Phase Composition ◽  
Fatigue Strength ◽  
Structural Steel ◽  
Carbon Steels ◽  
Industrial Plant ◽  
Tempering Temperature ◽  
Composition And Structure ◽  
Metallic Inclusions ◽  
Metallurgical Processes

AbstractThe quality of carbon steels working at variable loads mainly depend of microstructure, but also of impurities. The quantity and morphology of non-metallic inclusions and spaces between impurities are correlated with the content of admixtures in the alloy, while their phase composition and structure, in particular shape, dimensions and dispersion, are determined by the course of metallurgical processes. Non-metallic inclusions as impurities found in steel can affect its performance characteristics. Their impact depends not only on their quality, but also, among others, on their size and distribution in the steel volume. The literature mainly describes the results of tests on hard steels. The article discusses the results of a study investigating the effect of the number of large non-metallic inclusions (over 10 μm in size) on the fatigue strength of structural steel during rotary bending. The study was performed on 6 heats produced in an industrial plant. Fourteen heats were produced in 140 ton electric furnaces. All heats were desulfurized and refined with argon. The experimental variants were compared in view of the tempering the research steel. The fatigue strength of steel with an impurity spaces was determined during rotary bending: the results revealed that fatigue strength is determined by the impurity spaces and tempering temperature.

scholarly journals Transformation of M/A Constituents during Tempering and Its Effects on Impact Toughness of Weld Metals for X80 Hot Bends

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Gui-ying Qiao ◽  
Xiu-lin Han ◽  
Xiao-wei Chen ◽  
Xu Wang ◽  
Bo Liao ◽  
...  
Keyword(s):  
Impact Toughness ◽  
Weld Metal ◽  
Acicular Ferrite ◽  
Tempering Temperature ◽  
Factors Affecting ◽  
Weld Metals ◽  
Gleeble 3500 ◽  
The Impact ◽  
Carbide Particles

Impact toughness of the weld metal is one of the important factors affecting the quality of hot bends, which is strongly dependent on the microstructure transformation during hot bending and tempering. In this study, three kinds of weld metals with different Ni contents were selected, and then the effects of tempering temperature on the microstructure impact toughness of weld metals for hot bends were investigated by simulation conducted on a Gleeble-3500 thermal simulator. The results show that the nonmetallic inclusion particles in weld metals can become the nuclear core of acicular ferrite like in as-welded metal. So, the overlapping acicular ferrite microstructure is obtained in the weld metal after direct cooling from the reheating temperature. During tempering, the overlapping acicular ferrite microstructure is degenerated, and martensite/austenite (M/A) constituents in the acicular ferrite microstructure decompose into ferrites and carbides. The resulting carbide particles mainly distribute along the acicular ferrite grain boundaries. With the increase of the tempering temperature, the carbide particles coarsen, which decreases the impact toughness of the weld metal of hot bends. Addition of Ni to weld metals can refine the acicular ferrite and improve the impact toughness.

Web-Based Human Machine Interaction in Manufacturing

2006 ◽  
pp. 722-728
Author(s):  
Thorsten Blecker ◽  
Günter Graf
Keyword(s):  
Human Machine Interaction ◽  
Web Based ◽  
Industrial Facilities ◽  
Easy Task ◽  
Machine Systems ◽  
Almost All ◽  
Physical Output ◽  
Machine Interaction ◽  
Weld Seams

The quality of HMI in automation is an important issue in manufacturing. This special form of interaction occurs when the combination of human abilities and machine features are necessary in order to perform the tasks in manufacturing. Balint (1995) has identified three categories of such human-machine systems: 1. Machines might do the job without human involvement, but the feasibility is questionable. For example, weld seams in car assembly are made mostly autonomously by robots, but in many cases, humans have to guide the robot to the weld point, because the robot is not able to locate the point correctly, which is a relatively easy task for a human. 2. Humans might do the job without machines, but the efficiency/reliability is questionable. This is the case in almost all cases of automation (e.g., the varnishing of cars). 3. HMI is necessary (no purely machine- or human-based execution is possible), although robots today are widely in use; in many cases, they cannot substitute humans completely, because the possible conflicts that can occur are so diverse that a robot alone cannot manage them. The term HMI is used widely for the interaction of a human and a somewhat artificial, automated facility, which is true in many situations, including HCI. In this article, we speak of HMI in industrial settings. We term the machine especially for industrial facilities for producing a certain (physical) output; in this case, the term man-machine interaction also is used synonymously for HMI. We define HMI as the relation between a human operator and one or more machines via an interface for embracing the functions of machine handling, programming, simulation, maintenance, diagnosis, and initialization.

scholarly journals Design of Polypropylene Random Co-Polymer Pipe Cutter

2020 ◽  
Vol 5 (9) ◽  
pp. 1161-1166
Author(s):  
Tilahun B. Wake ◽  
Wassihun Y. Amedie
Keyword(s):  
Material Selection ◽  
Optimum Combination ◽  
Disc Cutter ◽  
Tempering Temperature ◽  
Cut Edge ◽  
Optimum Material ◽  
Poly Propylene ◽  
Different Thickness ◽  
Tempering Time

The purpose of this research is to design disc cutter for cutting poly propylene random co-polymer (PPR) and high density polypropylene (HDP) extrudates. Analytical methods and software including like Catia and ANSYS are used to design the tool and analyze the effect of load on the cutter. In designing the disc Cutter, using the digital logic method of material selection, the optimum material, carbon steel 19573 with the least cost, locally obtainable, manufacturable and with hardness 63.42HRC is selected. The desired optimum combination of hardness and toughness of the cutter is obtained using hardening temperature 10200C, tempering temperature 2000C, and tempering time 120min which finally gives a hardness value of 63.42HRC. The strength and quality of cut edge are tested by cutting hard plastic PPR pipe with maximum thickness of 12.9mm. By the same setup of the cutter used in the factory the prototype disc cutter serves and its failure rate improves from cutting 150 to 250 PPR pipe pieces which was recognized by the industry. The research results can be used to design the cutter disk and fabricate a cutter with enough strength to cut different thickness of PPR pipes without breakage, reducing unwanted additional cost.

Sign in / Sign up

Export Citation Format

Share Document