A.T.Consultants Pvt. Ltd.

Patel Colony, Jamnagar, Gujarat

Mandrel is the basic tool required in Cold Pilger Millsor Cold Tube Rolling Mills in tube industries. The inner dia of the tube or pipes are controlled with the mandrels i.e. size and finish of the tubes / pipes are controlled with the mandrels. To control the inner diameter of tube is very essential. To achieve the good quality of the tubes the die and the mandrels should be properly ground and it should meet the close tolerances with each other. Also the surface finish of the tubes is very much dependent on the surface finish of mandrels. Basically mandrels are in form of taper shaped shafts. As per the tool designer for tubes on the pilger mill, the data is generated for forming of the mandrel. The general arrangement of the mandrel grinding machine is like cylindrical grinder. But, the cylindrical grinder has its limitations for grinding.

Mandrel grinding machine is designed and manufactured as per the requirement to make the perfect tool for pilger mills. Machine is capable to grind each and every point on the mandrel as per the data generated by the tool designer. Mandrel grinding machine consists of 4 axes. After completion of the processes on the mandrel like rough turning, hardening etc, mandrel is to be placed and fitted in between center to center in the machine for grinding. Machine will grind as per the tool data. And auto CNC program will perform the grinding operation. Dressing of the abrasive wheel will be done automatically through CNC program after specified durations. After grinding the mandrel, the mandrel is checked with the probe after checking as per the required

The machine grinds the mandrels of size105 mm in diameter and 1200 mm in length.

The machine is custom made as per the requirement of the customer and is part of the tool room equipment for all pilgar mill owners in the industry.

This is aspecial purpose 12 Axes CNC insert grinding machinedesigned and manufactured to grind FPS inserts on all eight working sides; including both up and down sides. The loading and unloading of the inserts with a magazine is done automatically with pneumatics so designed to place the inserts for grinding with a special fork and then place it back on the tray table after grinding.

The grinding of carbide inserts is done with specially designed two motorized grinding spindles. The CNC program designed for grinding offers a complete automatic cycle from auto loading, grinding, indexing and unloading of the inserts.

The dressing is also programmed into the CNC for auto dressing cycles of diamond wheels. Machine consists of 12 Axes CNC high end controller, coolant filtration unit, spindle chiller unit, hydraulic power pack, mist collector etc The machine is centrally controlled by PLC giving individual commands to each unit to work independently.