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.

Effect of Thermal Assistance on the Joining of Al6063 During Flow Drill Screwdriving

2015 ◽  
Author(s):  
Jamie D. Skovron ◽  
Durul Ulutan ◽  
Laine Mears ◽  
Duane Detwiler ◽  
Daniel Paolini ◽  
...  
Keyword(s):  
Fuel Economy ◽  
Cycle Time ◽  
Cost Reduction ◽  
Lower Cost ◽  
Process Time ◽  
Mechanical Process ◽  
Significant Challenge ◽  
Material Temperature ◽  
Process Benefits ◽  
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 thermo-mechanical process, Flow Drill Screwdriving (FDS). This process is favored in terms of robustness, short installation time, and only requiring access to one side. The most significant challenge of this process is reducing the material sheet separation to minimize any possibility of corrosion buildup. Warm forming of aluminum has been shown to increase ductility and formability of the material and thus the process benefits from a reduced cycle time that leads to cost reduction. In this study, the effect of an auxiliary heat source on the flow of Al6063 is investigated for the FDS application. In order to accomplish this task, a conduction-heating ring is implemented into the FDS process to raise the material temperature and thus reduce the total cycle time. Different preprocess material temperatures are studied to determine the effect of material temperature on the process time, installation torque, and sheet separation. As a result, with the thermal assistance, a reduction in the process time up to 52%, the maximum installation torque by 20%, and sheet separation by 11% were attained, indicating better quality joints at a lower cost.

Effect of Thermal Process Time on Quality of "Shrimp Kuruma" in Retortable Pouches and Aluminum Cans

2006 ◽  
Vol 71 (6) ◽  
pp. S496-S500 ◽  
Author(s):  
C.O. Mohan ◽  
C.N. Ravishankar ◽  
J. Bindu ◽  
V. Geethalakshmi ◽  
T.K. Srinivasa Gopal
Keyword(s):  
Thermal Process ◽  
Process Time ◽  
Aluminum Cans

Investigation of the Cleaning and Welding Steps From the Friction Element Welding Process

2017 ◽  
Author(s):  
Jamie D. Skovron ◽  
Brandt J. Ruszkiewicz ◽  
Laine Mears ◽  
Tim Abke ◽  
Ankit Varma ◽  
...  
Keyword(s):  
Weld Zone ◽  
Welding Process ◽  
High Strength Steels ◽  
High Strength ◽  
Process Time ◽  
Friction Element ◽  
Joint Quality ◽  
Head Height ◽  
Friction Element Welding ◽  
Step Parameters

The requirement of increased fuel economy standards has forced automakers to incorporate multi-materials into their current steel dominant vehicles in order to lightweight their fleets. Technologies such as Self Piercing Rivets and Flow Drill Screws are currently implemented for joining aluminum to high-strength steels but only one-technology is viable for joining aluminum to ultra-high-strength steels without pre-holes, namely Friction Element Welding. This study is aimed at investigating how variations in the cleaning and welding steps of the Friction Element Welding process influence joint quality. A design of experiment was conducted to understand the influence of key process parameters (endload, spindle RPM, and relative distance) during these steps on the pre-defined joint quality metrics of head height, weld zone diameter, under-head fill area, temperature, and microhardness. It is found that cleaning step parameters have the greatest influence on process time and energy consumption, while welding step parameters greatly influence maximum torque on the element, head height, and underhead fill, with both cleaning force and weld force influencing weld diameter, all parameters influence temperature.

scholarly journals Influence of Welding Parameters On Grain Size, Haz and Degree of Dilution in 6063-t5 Alloy. Optimisation Through the Taguchi Method of the Gmaw Welding Process.

2022 ◽  
Author(s):  
Jose Luis Meseguer Valdenebro ◽  
Eusebio José Martínez Conesa ◽  
Antonio Portoles
Keyword(s):  
Grain Size ◽  
Taguchi Method ◽  
Heat Affected Zone ◽  
Welding Process ◽  
Welding Parameter ◽  
Welding Parameters ◽  
Taguchi’S Method ◽  
Gmaw Welding ◽  
Made In

Abstract The aim of this work is to carry out the design of experiments that determine the influence of the welding parameters using Taguchi’s method on the grain size, HAZ, and the degree of dilution in 6063-T5 alloy. The welding process used is GMAW and the welding parameters are power, welding speed and bevel spacing. The study of the influence of the welding parameters on the measurements made in the welding (which are the size of heat affected zone, the degree of dilution, and the grain size) allows one to determine the quality of the joint . In addition, the welding parameter most influential in minimising the three measurements will be determined.

Search Engine Performance Comparisons

2011 ◽  
pp. 148-164
Author(s):  
Xiannong Meng ◽  
Song Xing
Keyword(s):  
Search Engine ◽  
Search Engines ◽  
Engine Performance ◽  
Process Time ◽  
Average Process ◽  
Search Results ◽  
Time Average ◽  
Evaluation Techniques ◽  
Average User

This chapter reports the results of a project attempting to assess the performance of a few major search engines from various perspectives. The search engines involved in the study include the Microsoft Search Engine (MSE) when it was in its beta test stage, AllTheWeb, and Yahoo. In a few comparisons, other search engines such as Google, Vivisimo are also included. The study collects statistics such as the average user response time, average process time for a query reported by MSE, as well as the number of pages relevant to a query reported by all search engines involved. The project also studies the quality of search results generated by MSE and other search engines using RankPower as the metric. We found MSE performs well in speed and diversity of the query results, while weaker in other statistics, compared to some other leading search engines. The contribution of this chapter is to review the performance evaluation techniques for search engines and use different measures to assess and compare the quality of different search engines, especially MSE.

Study of Explosion Welding of Mg Alloy with Aluminium

2010 ◽  
Vol 297-301 ◽  
pp. 1177-1182 ◽  
Author(s):  
Michal Benák ◽  
Milan Turňa ◽  
Peter Palček ◽  
Peter Nesvadba
Keyword(s):  
High Speed ◽  
Explosion Welding ◽  
Mg Alloy ◽  
Basic Requirement ◽  
X Ray ◽  
Welding Technology ◽  
Alloy Type ◽  
Parallel Arrangement ◽  
Joint Quality

The aim of the present work was to solve the technology for welding Mg alloy type AZ 63 with aluminium and to assess the quality of the fabricated joints (bimetals-composites). In solving the welding technology, the high affinity of Mg to oxygen has to be considered and therefore as suitable technology either metallurgical joining in vacuum (electron beam etc.) or high-speed solid state welding seem to be feasible. Explosion welding with Semtex S 30 explosive was approved experimentally. Parallel arrangement of welded materials was applied. The more plastic Al material was accelerated. Quality of bonds (bimetals) was assessed by defectoscopy (ultrasound), optical microscopy, microhardness measurement and X-ray microanalysis. It can be generally stated that the basic requirement on joint quality (namely the undulated boundary) was met. The structural composition and absence of inhomogeneities in fabricated bimetals suggest that the desired quality was achieved.

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