Logo weiterlesen.de
Cover zur kostenlosen eBook-Leseprobe von »Effect of Machining Parameters on Surface Roughness and Dimensional Accuracy of Micro Drilling for Copper«

Effect of Machining Parameters on Surface Roughness and Dimensional Accuracy of Micro Drilling for Copper

BookRix


Drilling is one of the basic machining process of making holes and that is is essential formanufacturing industry. Therefore optimization of the parameters that control the process ofmicro drilling is unavoidable in order to have the best results. In this study the parametricoptimization of micro drilling has been studied by considering a number of parameters such asspindle speed, feed rate and drilling tool size on material removal rate (MRR), surfaceroughness, dimensional accuracy. In this work, a study has been done on optimum drillingparameter for carbide drilling tool in micro-drilling processes in order to find the best drillingparameter for copper as a work piece material. Micro drilling experiment with 2.3mm to 2.6 mmdrill sizes were performed by changing the spindle speed and feed at three different levels.Comparative analysis has been done between surface roughness, MRR and dimensional accuracyof drilled holes by experimentation. From the result, the surface roughness are mostly influencedby spindle speed and feed rate. As the spindle speed increases, the surface roughness willdecrease. However the surface roughness increases with increase in feed rate. The value ofMRR decrease when the tool diameter, spindle speed and feed rate decreases. As drilling tooldiameter, feed rate and spindle speed increase the dimensional accuracy of drilled hole willdecrease. The increment of spindle speed and feed rate value will affect the tool wear.

Leseprobe lesen
Web-Ansicht
Download
EPUB
Kaufen

Empfehlen

Cover zur kostenlosen eBook-Leseprobe von »Automated system for sustainability indices for sand casting«

Automated system for sustainability indices for sand casting

BookRix


Sand casting parts are widely used in various assemblies so these are in huge demand. To meet the increasing demand and increasing manufacturing cost industries are focusing on sustainable manufacturing. Life cycle assessment tools are used by the industries to quantify sustainability of a process. In the present study, a computer aided system to analyze the sustainability of sand casting process is developed. The proposed system can determine indicators like energy use, solid waste, cost, and other miscellaneous consumption like flux, die-coat lubricant for sand casting process. It determines the sustainability indicators on the basis of the selection of metal, metal alloy and sub-process. This system has user friendly Graphical User Interface (GUI).That has been developed to prompt user to select the various choices in the system and enter data for the process plan.

Leseprobe lesen
Web-Ansicht
Download
EPUB
Kaufen

Empfehlen

Cover zur kostenlosen eBook-Leseprobe von »Automated system for designing gating system of sand casting«

Automated system for designing gating system of sand casting

BookRix


Designing in sand casting is a critical activity for manufacturing. Further, activities like cavity design, cavity layout and design of gating system are essential in design. Design of gating system in sand casting is dependent upon a various parameters. Gating system design requires lot of manual input and a number of iterations to finalize the design. This requires a good knowledge of casting process, making this activity completely dependent on the user. In present day industry, lot of CAD/CAM tools are applied for design, development and manufacturing. However, need of sand casting expert throughout design and manufacturing makes it a quite lengthy process. Gating system design being one of the major activities also takes much time. Therefore, it would be quite beneficial to develop a system for automated generation of gating system. Proposed system takes CAD file of the die casting part as input and uses sand casting process, machine and alloy knowledge to determine different parameters for the gating system. Designs of the components of the gating system like runner, gate and overflow have been attempted. A feature library has been proposed as a part of this work which together with parametric design of the gating system generates CAD model of the components of the gating system. The system would go a long way in bridging the gap between designing and manufacturing of die-casting.

Leseprobe lesen
Web-Ansicht
Download
EPUB
Kaufen

Empfehlen

Cover zur kostenlosen eBook-Leseprobe von »The effect of post welded heat treatment on mechanical properties and microstructure of friction stir welded Al 6063«

The effect of post welded heat treatment on mechanical properties and microstructure of friction stir welded Al 6063

BookRix


Aluminium is the third most abundant element (after oxygen and silicon), and the most abundant metal in the Earth's crust. Aluminium is remarkable for the metal's low density and for its ability to resist corrosion due to the phenomenon of passivation. Structural components made from aluminium and its alloys are vital to the aerospace industry and are important in other areas of transportation and structural materials

Welding plays a crucial role or say as a back bone of manufacturing industry to join the components. Friction stir welding (FSW) is a relatively new joining process that has been demonstrated in a variety of metals such as steel, titanium, lead, copper and aluminium. The unique properties of friction stir welds make possible some completely new structural designs with significant impact to ship design and construction. Friction stir welding is especially advantageous for joining aluminium and has been exploited commercially around the world in several industries.

In the present work the effects of welding speed have been investigated on the microstructural and mechanical properties of friction stir welded aluminium alloy 6063. FSW was carried out at rotational speed of 1300 rpm (constant) and transverse speeds of 35, 50 and 65 mm/min. Mechanical performance has been investigated in terms of hardness, wear resistance and tensile strength. To study the effect of post welding heat treatment on properties of friction stir welded joint, the artificial ageing was carried out at 1600 C for a soaking period of 20 hours in the muffle furnace. The study revealed that friction stir welded joint prepared at welding speed of 35 mm/min exhibited better tensile strength, hardness and wear resistance. Better mechanical properties of the joint prepared at welding speed of 35 mm/min may be attributed due to fine, homogeneous and equaxed grain structure of stir zone. Post welding heat treatment of friction stir welded joint improved the wear resistance and microhardness of the joint. However tensile properties deteriorated with the post welding heat treatment of joint.

Leseprobe lesen
Web-Ansicht
Download
EPUB
Kaufen

Empfehlen

Cover zur kostenlosen eBook-Leseprobe von »Influence of SAW parameters on flux consumption«

Influence of SAW parameters on flux consumption

BookRix


The present research has been done to investigate the influence of different input process parameters on the desired response (flux consumption) in the submerged arc welding process. Fractional factorial technique has been used to design the experiment to reduce the number of runs. The effects of welding current, arc voltage, travel speed and nozzle to plate distance have been found on the flux consumption. The Design Expert software has been used to obtain relationship between the response and parameters. The effect of all the input parameters on the output responses have been analyzed using the analysis of variance (ANOVA) and mathematical modelling.

Leseprobe lesen
Web-Ansicht
Download
EPUB
Kaufen

Empfehlen

Cover zur kostenlosen eBook-Leseprobe von »Friction Stir Processing of Aluminium Alloy Using Multipass Technique«

Friction Stir Processing of Aluminium Alloy Using Multipass Technique

BookRix


FSP is manufacturing the Technique used to modify the microstructure metals. In this process a rotating tool is penetrated in the work piece and moved in the transverse direction.

Further FSP technique is used for fabrication of surface composite on aluminium substrate and homogenization of powder metallurgy aluminium alloy, metal matrix composites, and the cast aluminium alloys. By this process material properties can be improved due to enhancement of grain structure. With this technique the material have shown good corrosion resistance, high strength and high fatigue resistance.

Leseprobe lesen
Web-Ansicht
Download
EPUB
Kaufen

Empfehlen

Cover zur kostenlosen eBook-Leseprobe von »Heat Treatment Processes«

Heat Treatment Processes

BookRix


It may be defined as an operation of heating and cooling of metals or alloys in the solid state to induce certain desired properties into them. Heat treatment can alter the mechanical properties of steel by changing the shape and size of grains of which it is composed, or by changing its micro-constituents.

Leseprobe lesen
Web-Ansicht
Download
EPUB
Kaufen

Empfehlen

Cover zur kostenlosen eBook-Leseprobe von »Influence of tool pin profile on single sided friction stir welded joint (AA6061)«

Influence of tool pin profile on single sided friction stir welded joint (AA6061)

BookRix


Friction welding is a solid state joining process used for joining of different metals that provides similar welding properties as like parent metal properties. In this welding process no filler metal is required and thus it’s a emissions less process. In this experiment for the purpose to joining of pieces include the generation of heat with the help of friction. Due to this pressure with variable speeds the tool moves on the work piece for joining of two metals. The soft layer of material will move out and angular movement starts during this process.

Leseprobe lesen
Web-Ansicht
Download
EPUB
Kaufen

Empfehlen

Cover zur kostenlosen eBook-Leseprobe von »Influence of welding parameters on bead geometry in SAW«

Influence of welding parameters on bead geometry in SAW

BookRix


The present research has been done to study the effect of different independent input process parameters on the desired responses in the submerged arc welding process. Half factorial technique has been used for the design of experiments. The effects of welding current, open circuit, welding speed and nozzle to plate distance have been found on the reinforcement, bead width,  depth of penetration and width of penetration on 12mm mild steel plates. The effect of all the input parameters on the output responses have been analyzed using the analysis of variance (ANOVA) and mathematical modeling. The developed models could be used for the prediction of important weld bread geometry and control of the weld bead quality by selecting appropriate process parameters.

Leseprobe lesen
Web-Ansicht
Download
EPUB
Kaufen

Empfehlen

Cover zur kostenlosen eBook-Leseprobe von »The effect of welding parameters on mechanical properties and microstructural behaviour of Al Alloy 6061 using TIG«

The effect of welding parameters on mechanical properties and microstructural behaviour of Al Alloy 6061 using TIG

BookRix


Activated tungsten inert gas welding process involves a method of increasing penetration capability of the arc in TIG welding. This is achieved through the application of a thin coating of activated flux onto the joint surface prior to welding. This leads to strong joint. This paper deals with the study of microstructural and mechanical properties of aluminium alloy AA-6061 weld joints using A-TIG welding. During the experiment the welding current and gas flow rate are used as variable parameters and welding speed kept as constant. In this activated TIG welding process, there were five single component fluxes which are CdCl2, SiO2, MgO, Al2O3 and TiO2 used in the initial experiment to evaluate Welding current, Gas Flow Rate, Flux by joining plates by using A-TIG welds. Based on the higher penetration of weld bead, two single component fluxes SiO2 and TiO2 were selected for actual experiment. The values of optimum welding current and gas flow rate and flux was finding out from the experiment. Welding specimen were investigated using scanning electron microscope, vicker’s micro hardness test and tensile strength. The SiO2 flux produced the most noticeable effect in terms of tensile strength and micro hardness.

Leseprobe lesen
Web-Ansicht
Download
EPUB
Kaufen

Empfehlen