scholarly journals High-Speed Friction Welding as an Innovative Technology for Joining Solenoid Valve Elements Made of Steel Grades 11SMnPb37 and 11SMn37

2021 ◽  
pp. 25-30
Author(s):  
Damian Miara ◽  
Jolanta Matusiak ◽  
Adam Pietras ◽  
Mateusz Świetlik
Keyword(s):  
Friction Welding ◽  
High Speed ◽  
Solenoid Valve ◽  
Innovative Technology ◽  
Test Results ◽  
Technological Parameters ◽  
Steel Grades ◽  
Solid State Joining ◽  
Joining Process

High-speed friction welding (HSFW) is a solid-state joining process involving the use of friction heat emitted during the technological process. The application of the HSFW technology enables the fast and repeatable making of joints characterised by favourable properties. The article presents tests concernin the development of the HSFW-based technology enabling the joining of solenoid valve elements made of two grades of free-cutting steel, i.e. 11SMnPb37 and 11SMn37. The article also discusses the course of technological tests, the making of a test rig, the determination of ranges of technological parameters and selected test results concerning welded joints.

Expert methods of developing of innovative technologies for the production of cast tools. Part 1. Formation of a complex of functional indicators of technology

2021 ◽  
pp. 57-61
Author(s):  
Keyword(s):  
High Speed ◽  
High Reliability ◽  
Assessment Method ◽  
Innovative Technology ◽  
Expert Assessment ◽  
Innovative Technologies ◽  
Design Expert ◽  
Effective Technology ◽  
Casting Design

A method for the development an effective technology for casting of billets of insert cutters with specified properties from high-speed steels for milling cutters of rotors of mining combines is proposed, including the identification of a set of goals, the choice of priority technology and the determination of the specified characteristics of the technology. An alternative method of expert assessment is proposed, which ensures high reliability of the results. Keywords: innovative technology, casting, design, expert assessment method. [email protected], [email protected]

High-Throughput Analytical Techniques for Determination of Residues of 653 Multiclass Pesticides and Chemical Pollutants in Tea, Part II: Comparative Study of Extraction Efficiencies of Three Sample Preparation Techniques

2013 ◽  
Vol 96 (2) ◽  
pp. 432-440 ◽  
Author(s):  
Chun-Lin Fan ◽  
Qiao-Ying Chang ◽  
Guo-Fang Pang ◽  
Zeng-Yin Li ◽  
Jian Kang ◽  
...  
Keyword(s):  
Sample Preparation ◽  
Green Tea ◽  
High Speed ◽  
Extraction Efficiency ◽  
Preparation Technique ◽  
Test Results ◽  
Chemical Pollutants ◽  
Chemical Pollutant ◽  
Three Stages

Abstract This paper reports a study of the extraction efficiency for the multiresidue pesticides and chemical pollutants in tea with three methods over three stages. Method 1 adopts the Pang et al. approach: the targets were extracted with 1% acetic acid in acetonitrile and cleaned up with a Cleanert TPT SPE cartridge; Method 2 adopts the QuEChERS approach: the targets were cleaned up dispersively with graphitized carbon and primary-secondary amine (PSA) sorbent; Method 3 adopts the relatively commonly used approach of hydration for solid samples, with tea hydrated before being extracted through salting out with acetonitrile and the cleanup procedures identical to those of Method 1. The three stages comprised two phases of comparative tests on spike recoveries of 201 pesticides and chemical pollutants from different teas and a third phase on determination of the content of the 201 pesticides and chemical pollutants from aged tea samples. In stages I and II, test results of the spike recoveries of 201 pesticides and chemical pollutants demonstrated that 91.4% of the pesticide and chemical pollutant recoveries fell within the range of 70–110%, and 93.2% of the pesticides and chemical pollutants had RSD < 15%, with no marked difference obtained by Method 1 and Method 2 regardless of whether it was green tea or woolong tea, or GC/MS or GC/MS/MS was used for analysis. For pigment removal, Method 1 was superior to Method 2; in terms of easy operation, Method 2 outweighed Method 1. However, Method 3 obtained relatively low recoveries, with 94% of pesticide and chemical pollutant recoveries less than 70%, which proved that Method 3 was not applicable to the determination of multiresidue pesticides and chemical pollutants in tea. Stage III made a comparison of Method 1 and Method 2 for the extraction efficiency of pesticides and chemical pollutants in 165-day-aged samples of green and woolong tea. Test results showed that 94% of the pesticide and chemical pollutant content in the aged tea samples was recovered with Method 1, more than 10% higher than with Method 2 (30–50% higher on average). For green tea, 193 (GC/MS/MS) and 197 (GC/MS) pesticides and chemical pollutants accounted for 96.5% (GC/MS/MS) and 98.0% (GC/MS) with Method 1 higher than with Method 2. For woolong tea, 191 (GC/MS/MS) and 194 (GC/MS) pesticides and chemical pollutants accounted for 95% (GC/MS/MS) and 96% (GC/MS/MS) with Method 1, higher than with Method 2, respectively. In other words, there were definite differences in the test results for aged tea samples between Method 1 and Method 2, which suggests that Method 1 was capable of extracting more residual pesticides and chemical pollutants from the precipitated 165-day-aged tea samples. The reason can be traced to the possibility that Method 1 (high-speed homogenizing) has better extraction efficiency than Method 2 (vortex and oscillation). Therefore, Method 1 was chosen as the sample preparation technique for multiresidue pesticide and chemical pollutant analysis in tea.

Friction Self-Piercing Riveting (F-SPR) of AA6061-T6 to AZ31B

2013 ◽  
Author(s):  
YongBing Li ◽  
ZeYu Wei ◽  
YaTing Li ◽  
ZhaoZhao Wang ◽  
Xiaobo Zhu
Keyword(s):  
Magnesium Alloys ◽  
Spot Welding ◽  
High Speed ◽  
Dissimilar Materials ◽  
Friction Stir Spot Welding ◽  
Friction Stir ◽  
Riveting Process ◽  
Solid State Joining ◽  
Joining Process ◽  
Vehicle Bodies

Implementation of lightweight low-ductility materials such as aluminum alloys, magnesium alloys and composite materials has become urgently needed for automotive manufacturers to improve the competitiveness of their products. However, the hybrid use of these materials poses big challenges to joining processes. Self-piercing riveting (SPR) is currently the most popular technique for joining dissimilar materials and has been widely used in joining all-aluminum and multi-material vehicle bodies. However, in riveting magnesium alloys, cracks always occur for its low ductility. In this paper, a hybrid joining process named friction self-piercing riveting (F-SPR), which combines mechanical joining mechanism of SPR with solid-state joining mechanism of friction stir spot welding (FSSW) by making rivet rotating at high speed in riveting process, was proposed aiming at joining the low ductility materials. 1-mm-thick AA6061-T6 and 2-mm-thick AZ31B were used to validate the effectiveness of the F-SPR process. The results showed that the F-SPR process could significantly improve the rivetability of magnesium alloys, and greatly increase the joint strength, comparing with traditional SPR process.

Friction Self-Piercing Riveting of Aluminum Alloy AA6061-T6 to Magnesium Alloy AZ31B

2013 ◽  
Vol 135 (6) ◽  
Author(s):  
YongBing Li ◽  
ZeYu Wei ◽  
ZhaoZhao Wang ◽  
YaTing Li
Keyword(s):  
Magnesium Alloys ◽  
Spot Welding ◽  
High Speed ◽  
Dissimilar Materials ◽  
Friction Stir ◽  
Magnesium Alloy Az31b ◽  
Riveting Process ◽  
Solid State Joining ◽  
Joining Process ◽  
Vehicle Bodies

Implementation of lightweight low-ductility materials such as aluminum alloys, magnesium alloys and composite materials has become urgently needed for automotive manufacturers to improve the competitiveness of their products. However, hybrid use of these materials poses big challenges to traditional joining process. Self-piercing riveting (SPR) is currently the most popular technique for joining dissimilar materials and has been widely used in joining all-aluminum and multimaterial vehicle bodies. However, in riveting magnesium alloys, cracks always occur for its low ductility. In this paper, a hybrid joining process named friction self-piercing riveting (F-SPR), which combines mechanical joining mechanism of SPR with solid-state joining mechanism of friction stir spot welding (FSSW) by making rivet rotating at high speed in riveting process, was proposed aiming at joining the low-ductility materials. The effectiveness of the F-SPR process was validated via riveting 1 mm thick AA6061-T6 and 2 mm thick AZ31B. The results showed that the F-SPR process could significantly improve the rivetability of magnesium alloys, and greatly increase the joint strength, comparing with the traditional SPR process.

Influence of Process Parameter on Microstructural Characteristics and Tensile Properties of Friction Welded ASS304L Alloy

2015 ◽  
Vol 766-767 ◽  
pp. 745-750 ◽  
Author(s):  
K. Umanath ◽  
K. Palanikumar
Keyword(s):  
Mechanical Properties ◽  
Solid State ◽  
Stainless Steels ◽  
Friction Welding ◽  
Welding Process ◽  
Austenitic Stainless Steels ◽  
Microstructural Characteristics ◽  
Solid State Joining ◽  
Joining Process ◽  
Rotary Type

The rotary type continuous friction welding process is a solid state joining process by mechanically. It produces a joint in the forging pressure contact with rotating and motionless workpiece. The solid state joining process it produces welds with reduced distortion and improved mechanical properties. The austenitic stainless steels are widely used in shipbuilding field, nuclear field and automobile field because of their special mechanical and metallurgical properties. In this work, friction welding of austenitic stainless steel rods of 10mm diameter was investigated with an aim to understand the influence of friction welding process parameters. The details of microstructure analysis using optical microscopy are discussed.

Rotor Design for High Speed PM Machine Based on Riccati Transfer Matrix Method

2011 ◽  
Vol 383-390 ◽  
pp. 337-343
Author(s):  
Ji Qiang Wang ◽  
Feng Xiang Wang
Keyword(s):  
Magnetic Properties ◽  
High Speed ◽  
Magnetic Bearing ◽  
Vibration Modes ◽  
Test Results ◽  
Rotor Design ◽  
Transfer Method ◽  
Rotor Structure ◽  
Bearing System

The rotor under study is a PM rotor of a synchronous machine intended for operation at 60 000 rpm. It is well known that design of high speed permanent magnetic (PM) rotor is quite different from that of a normal PM rotor. The determination of the rotor structure and dimensions must take consideration of the strength, stiffness and the magnetic properties of the PM rotor. Based on the Riccati transfer method, the dynamic model of the rotor-bearing system has been established. Then the supporting stiffness of the magnetic bearing is estimated and the PM rotor’s critical speeds and the corresponding vibration modes have been found. A prototype has been built and some test results proved the correct of the calculation.

Optimization of Friction Welding Parameters for AA6061-T6/AA2024-T6 Joints Using Taguchi-Simulated Annealing (TSA) Algorithm

2014 ◽  
Vol 592-594 ◽  
pp. 595-599 ◽  
Author(s):  
R. Adalarasan ◽  
M. Santhanakumar ◽  
A. Shanmuga Sundaram
Keyword(s):  
Simulated Annealing ◽  
Friction Welding ◽  
Quality Characteristics ◽  
Welding Parameters ◽  
Dissimilar Joints ◽  
Weld Area ◽  
Measure Of Performance ◽  
Experimental Trials ◽  
Solid State Joining ◽  
Joining Process

Friction welding is an economical solid state joining process which has gained industrial acceptance for producing dissimilar joints with light weight applications. In this work continuous drive friction welding was employed to produce AA6061-T6/AA2024-T6 joints. The process parameters which influence the quality characteristics of the joint like the frictional pressure, upset pressure, rotational speed and burn off length were varied in three levels and the experimental trials were designed by Taguchi’s L9 orthogonal array. Yield strength, ultimate strength and micro-hardness in the weld area were observed as the responses for the various trials. Weighted S/N (WSN) ratio was calculated for each trial by utilizing the weights generated by simulated annealing (SA) algorithm. The optimal levels were sorted out by taking the WSN ratio as a measure of performance and a confirmation experiment was conducted for validation. The results of ANOVA had revealed the significant contribution of upset pressure in affecting the quality characteristics.

A Simplified Extrusion Plastometer for Unvulcanized Rubber

1936 ◽  
Vol 9 (3) ◽  
pp. 496-501 ◽  
Author(s):  
J. H. Dillon
Keyword(s):  
High Speed ◽  
Test Results ◽  
Testing Instrument ◽  
Rubber Tubing ◽  
Routine Testing ◽  
Research Instrument ◽  
Physical Testing

Abstract An extrusion plastometer operating at rates of shear comparable with those existing in rubber tubing machines has been described previously. This plastometer was not designed to be a routine testing instrument, but rather was intended for use in the determination of the value of a high speed extrusion test for the factory control of rubber stocks. The plastometer served satisfactorily in the capacity of a research instrument, and has for some time been in constant use as a physical testing instrument where great rapidity of operation is not essential. The results obtained with this plastometer were found to correlate with tubing machine behavior. It was also found that the extrusion plastometer results agreed better with factory experience with various types of masticated rubber than did the Williams plastometer results. It was learned by experience with the extrusion plastometer, when used as a physical testing instrument, that its results agreed closely with calender behavior. In many cases, it was found that the extrusion plastometer results did not correlate with the Williams plastometer results and that, in general, the extrusion plastometer appeared to be much more sensitive than the Williams plastometer. The next step after establishing the value of the high speed extrusion test was to design an extrusion plastometer suitable for routine control testing. Such an instrument must be rugged in construction, rapid and simple in operation, and must yield precise results. The extrusion plastometer, which is described in this paper, was designed to fulfill these requirements and at the same time to give the same type of test results as those given by the original experimental plastometer.

CFD Simulation of Resistance of Highspeed Trimaran Hullforms

2015 ◽  
Author(s):  
Changhwan Son ◽  
Prasanta K. Sahoo ◽  
Vaibhav Aribenchi ◽  
Srikanth Asapana
Keyword(s):  
High Speed ◽  
Cfd Simulation ◽  
Accurate Determination ◽  
Cfd Analysis ◽  
Test Results ◽  
Ansys Fluent ◽  
Speed Range ◽  
Calm Water ◽  
Hull Forms

This paper attempts to carry out a CFD analysis on total resistance for trimaran hull forms based on established NPL systematic series which are high-speed round bilge hull forms. The resistance of high-speed trimaran hull forms have been determined using ANSYS FLUENT, a CFD software package. A systematic series of round bilge demi-hulls were generated, and their resistance in calm water were determined by using ANSYS FLUENT to briefly examine nature and degree of reliability of ANSYS FLUENT. The primary aim of this investigation is to determine resistance characteristics of slender round bilge trimaran hull forms in the high-speed range corresponding to Froude numbers up to 1.0. Model test results obtained from the paper Molland et al (1994) have been used to verify the efficacy of the CFD analysis. The results obtained from CFD have shown considerable promise and further analysis need to be carried out for accurate determination of resistance in trimaran configuration.

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