Resistance Spot Welding

Spot Welding can be one of the most demanding robotic applications.Welding effieciently requires quick spot to spot movement and high payload capacity to accomodate a typical spot welding gun.Possessing these traits allows Nachi Robots to excel in spot welding applications,especially when the required production rate is high.Nachi is the leading supplier of spot welding robots in Japan and North America

Nachi's ST Fast Series(ST133F,ST166F and ST210F) and ST Slim Series(ST70L and ST100) have an improved cable management system (CMS) that elimnates cable wear problems while expanding the usable range of motions.Power abd communcation cables as well as water and air hoses are completely contained within CMS.Neat packaging of all utilities elimnates the risk of them getting caught on peripheral equipment.This advantage allows very accurate offline programming as the robot dress geometry is standard

The ST "Slim" Series robots(ST70L and ST100) were designed with an advanced space saving concept making them ideal for compact systems or high density ,multi layered installations

Servo Gun technology is an important advance in Spot welding.Nachi has led the industry in Servo Gun technology development and has improved weld quality and speed.Servo driven spot welding guns offer major advancement in spot welding technology.Servo driven spot welding guns have several distinct advantages over pneumatic technolgy.Servo gun deliver very consistent tip force and do not slam electrodes onto work piece as pneumatic gun do;this increases electrode life and weld quality.The servo gun tip openeing can be programmed at any distance;this decreases cycle time because gun does not need to perform a full stroke between each weld.Equalization is performed by the robot,elimnating the need for self equalizing guns and thus reducing cost.The price of servo guns is still decreasing,as a result servo guns are popular tha ever.

Interfacing to welding equipment is an important part of setting up any spot welding application.Nachi offers many interface solutions ranging from fully integrated IWB(Integrated welding board) with MEDAR and DENGENSHA weld timers.Using IWB all relevant welding parameters can be programmed directly through robot teach pendant.Fieldbus type interface(Device Net,Profibus,Interbus,ControlNet)and standard but flexible discrete control are also available

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