Centerless Grinding Machine Air Cooling 3000RPM 20m/Min

Technical specification:

Machine Introduction:

1. Machine base and main structure parts: 

    Machine base and the main structure parts are made up of meehanite (inoculated) cast iron FC-30.After normalizing heat treatment, the cast iron base and parts will stay for natural aging treatment.The cast iron base and main parts are machined in the world top class machines, such as YASDA, MITSUI SEIKI, TOSHIBA, ELB, etc in one-time clamping. That make sure the high precision of the grinders in micron level.

2.Spindle:

Use the spindle of brand KENTURN from Taiwan. The spindle is made up of SNCM-21H alloy steel, whose hardness reaches up to HRC-62° with a harden layer of over 1.5mm, after a quenching-tempering, carburizing heat treatments, and computer-control deep hardening.The spindle is of hydrodynamic oil bearing, with a run out less than 0.001mm.

3. Regulating wheel transfer system:

   The regulating wheel spindle uses a servo driving motor of brand delta, with a variable rotary speed within 0-250 rpm (digit control). When the wheel diameter changes during grinding, the wheel linear speed can still keep the constant and the optimum, to make sure the best grinding quality.

   The servo motor is smartly assembled in the regulating wheel holder, and drives the spindle directly through synchronous belts, with the same tilting angle as the wheel, to keep parallel all along for the two belts, which can avoid inertia loss, and some other inconvenience brought by the old-type chain transfer system. Neither don’t have to change the chain and spring often.

4.Spindle oil cooling system:

   The auto centralized lubrication system (high grade spindle 10#) uses the same oil pump together with the hydraulic system. It is much convenient to change oil into the external oil tank. There are two filtering and pressure regulating units to make sure the long service life of spindle. The double way cooling system can keep the constant temperature for the spindle oil.

5.​Double-V guide:

  The stable double-V structure can make sure precise feeding, through hand shoveling and continuous  lubrication.

6.Electric system:

  The electric components and system use Schneider brand generally, for good operations and long service life. The electric cabinet has a big height and volume for convenient operation and excellent heat radiation performance.

Device description:

1. The body and components are cast by Milhanna high grade cast iron FC30, which is artificially normalized heat treatment and then treated by natural aging. Components are processed by YASDA, MITSUI SEIKI, TOSHIBA, ELB and other world-class equipment once clamping processing. Precision size can be up to micron level, to ensure high precision equipment basic components.

2. Machine guide rails and precision ball screws are continuously lubricated by automatic lubrication system to ensure longer service life and accuracy. The cooling system is separated from the body to eliminate vibration and favorable heat dissipation.

3.Equipped with Siemens 828D CNC automatic grinding system, and secondary development, man-machine dialogue fool operation, with many optional equipment to choose from, including inner hole grinding device, automatic end measuring device, automatic outside diameter measuring device, etc.

4. The grinding feed system is composed of a V and a flat track of hand-crafted precision shovel, with automatic lubrication system and C3 level precision grinding ball screw, which can achieve smooth movement, excellent repeated positioning accuracy and long track life.

5. The standard configuration of the grinding wheel spindle is rear four and rear two bearing structure. High precision dynamic and static pressure spindle can also be selected, which has the characteristics of high rotation precision, high dynamic stiffness, good vibration resistance, high grinding efficiency and good grinding surface quality. For special work-piece grinding, the grinding wheel speed can be adjusted, up to 3500 RPM and 60m/s.

6. The tail seat is designed to be both rigid and robust. A hardened alloy steel sliding cylinder encrusted in the cast iron body is designed to carry the MT4 top core. The jacking force of the sliding cylinder can be easily changed by adjustment knobs at the rear. Special accessories oil pressure tail seat with a pedal to facilitate unloading work parts.

7.Siemens numerical control system as the standard configuration, after secondary development, all Chinese operation interface, easy to use. Equipped with Siemens high performance servo motor, the equipment CNC system and drive system have better compatibility, at the same time with automatic sand repair and automatic compensation function, to ensure the stability and precision of feed and grinding.