Branches of mechanical engineering: Resistance Location Welding (Rsw) Working Regulation Together With Advantages-Disadvantages

Resistance Spot Welding (RSW) Working Principle 

Resistance Spot welding is comparatively modern welding process. It came inwards to the plain of welding inwards betwixt years 1900 - 1905. It is  a well-nigh widely used resistance welding method. The principal utilisation of resistance spot welding method is to  join 2 to 4 low-cal justice overlapping metallic sheets (which tin accept thickness upwardly to iii mm) . 

At showtime the undertaking is cleaned  and  all types of contaminants similar grease, oil, dirt , scale together with pigment are removed. The surface pf the electrodes are likewise made rattling clean.  For clamping the metal sheets together 2 copper electrodes are used at the same time.  The electrical current passes through electrodes together with so into the metallic sheets.  Because of the resistance, oestrus is generated inwards the air gap inside the contact points. Since copper is neat conductor oestrus is dissipated to the metallic so quickly. As the metallic (workpiece) is a misfortunate conductor of oestrus in comparison to the copper electrode the oestrus remains inwards the air gap.  So the oestrus remains inwards the i house creating a rigid final result together with the metallic is melted at that desired spot. The menstruum of oestrus dissipation is rattling pocket-sized together with at this fourth dimension metallic gets melted together with so snuff it corporation together with thence the articulation is formed. 

Please Read : 

• Resistance Seam Welding (RSEW)
• Resistance Projection Welding (RPW)
• Different Types of Welding Defects 

Steps involved inwards Resistance Spot Welding are shown past times the next diagram 

Advantages of Resistance Spot Welding 

• Comparatively Low cost
• Resistance Spot Welding (RSW) method doesn't need highly skilled worker. 
• Distortion or warping of parts is eliminated though it leaves roughly depressions or indentation. 
• The articulation made is highly uniform. 
• Automatic or semi-automatic functioning both tin last done. 
• There is no demand for border preparation. 
• Welding tin last done inwards quick succession. It simply needs a few seconds to brand the joint. 

Disadvantages of RSW

• The equipment toll is high so it tin has an final result on the initial cost. 
• Skilled welders or technicians are needed for the maintenance together with controlling.   
• Some metals demand especial surface grooming for making the RSW a success. 
• The thick jobs are non slowly to weld. 

Applications of Resistance Spot Welding 

• Spot welding of thick steel plates has been done together with it has replaced the demand for riveting. 
• The welding of 2 or to a greater extent than canvass metals tin last joined past times mechanical way to a greater extent than economically past times using the spot welding methods. We don't demand gas tight joints. 
• Spot welding tin last used for attaching braces, pads or clips amongst cases, bases together with covers which are mainly production of canvass metallic forming.
• Automobile together with aircraft industries relies greatly of spot welding these days. 

Please Read :

• Gas Metal Arc Welding (GMAW) or MIG Welding
• Flux shielded metallic arc welding procedure principle
• Tungsten Inert Gas welding or TIG welding 
• Advantages together with Disadvantages of Submerged arc welding 
• Submerged Arc Welding Working Principles together with Uses 

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