GP32-High rigidity and high quality base

High rigidity and high quality base:

1. Design concept of machine base and main structures:

During grinding, the most important is the retention of precision, which relays on the performance of thermal stability rather than anti-vibration. Cast iron itself has a very low coefficient of heat expansion, but very good heat conductivity, compared to the human-made granite. There arise a lot of heat during grinding, and it can be conducted out evenly through the cast iron base, thus, the machine is kept in a stable thermal status.

All the main structure parts are made from high grade cast irons or steels, including wheel head, work head, tail stock, spindles, and bearing holders. That ensures the machine body with continuous and similar materials, as well as stable thermal stability.

Any causal thermal change happened in short time will be compensated through the cast iron machine base, which is better than those made from steel or human-made granite.

Besides, the cast iron structure have high rigidity and good vibration absorption performance, better than the human-made granite. That fits the high precise grinding very much.

2. Longitudinal (Z axis) and horizontal (X axis) full support guides:

The worktable support surfaces are V-shape in one side and flat in the other side. And this structure has a good rigidity and heavy duty load capacity. The sliding surfaces are subjected to hand shoveling for the high precision. The sliding guides are covered with Turcite® coating, which is self lubricating, and also very low friction coefficient.

3.Bearing and ball screw:

Super high precision bearings are used in the worktable (Z axis), together with high precision ball screw and nut of Japanese THK standard.

4.Horizontal feeding guides (Wheel head feeding X axis):

5. X axis repeatability and positioning accuracy (Renishaw laser interferometer):

Linear guides are used in the horizontal X axis, to make sure a linear movement of high precision and low

friction.The roller type sliding guide has a very high load capacity.Sodick linear motor can eliminate the vibration during moving over magnet change.Maximum pushing force in short time: 1660-3060N.Haidenhain increment grating ruler with resolution of nano-level, ensures the feeding precision of X axis, to reduce the interpolation error.

6.Grinding head with high precision and high rigidity hydro-static-dynamic bearing:

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.

Technical specification: