Lapping Machine

The drive from the AC motor is taken through a worm and worm wheel reduction unit and then goes centrally through the main spindle to the central gear to the internal ring gear, through the work carriers.The drive from reduction gear unit is through a unidirectional clutch arrangement.This arrangement ensures a smooth motion when the machine is started. This feature also eliminates breakage of fragile components like silicon and germanium wafers while starting and stopping the machine.Both the lap plates are stationary. The differential motion given to the work carrier results in a random figure of '8' motion. This ensures that the component comes in contact over the entire area of the lap plate in so far feasible in line with the geometry of the component.A special camel back straight edge permits rapid and accurate assessment of the flatness of the lap plates.A set of special cast iron lapping gears are supplied with the machine for re lapping the top and bottom lap plates.

Features:The machine is constructed on a rigid welded hollow section steel frame, which houses a AC motor offered with variable frequency drive and a worm and worm wheel reduction gear unit.The central gear, internal ring gear and work carriers are driven a AC motor.

Applications :These machines can be very successfully used in: Electronic industries for lapping silicon wafers, germanium wafers, ferrite and piezo electric ceramics. Pump industries for lapping mechanical seals made of tungsten carbide and ceramics. Air compressor industries for lapping compressor valve plates. Automotive industries for lapping thrust washers and distance pieces used in power steering.

Accuracy:One light band to two light band over 75?component. (i.e. 0.3? to 0.6? over 75mm?). Surface finish : 0.2? Ra. Parallelism : 0.002mm over 75mm?.

A wide variety of materials can be lapped.The advantages of lapping machines for obtaining fine flatness and surface finish has long been recognized by production and design engineers.Proper finish and flatness can be achieved with any of the 7 standard Lapping Machines in the GMT range in bench and floor models.GMT Planetary Lapping Machines can lap both sides of a work piece simultaneously.As a consequence work pieces are processed efficiently without manual interruption and improved parallelism.Work pieces to be lapped are placed inside the work carriers. The work carriers are gear cut on the outer diameter and recessed to hold the component inside. Abrasive fluid is fed onto the lap plates continuously.The planetary lapping machines are ideally suited to lap thin, fragile materials  like silicon and germanium wafers extensively used in electronic industries.Other materials made of tungsten, ceramics, steel, bronze, carbon, aluminium,cast iron, plastics, stainless steel,  ferrite and alumina can also be lapped on these machines.

Parts of different shapes & thickness can be lapped.Because the lap plate maintains its flatness,production is not interrupted.