河北北重出售检验平台，铸铁检验平台，测量检验平台，质量有保证价格低

Technical requirements of Inspection surface Plate:

The working surface, when inspected visually, shall be free from blowholes, sand holes, cracks, slag inclusions scratches, porous patches and other visual flaws.

The working surface shall be clean and uniform and the other sides shall be painted well.

The plugging of blowholes or porous patches in the working surface with material of a similar composition is permitted provided that such a repair does not affect stability or accuracy.

The raw material of Cast Iron Surface Plate shall be the close-grained cast iron whose hardness is of HB 170~220.

Where tapped holes or inserts are required the necessary work shall be carried out before the working surface is finished.

 Maintenance of Inspection Surface Plate:

1. A surface plate is a a surface plate is a datum and should be protected against damage. The top should be frequently wiped clean from dust and other particles. When measurements are being made, a cloth should be spread on the surface plate on which small tools and gauges can be placed when not in use. When the surface plate is not in use the top should always be kept covered.

2. The plate should be in a location away from direct sunlight and sources of draughts which could cause a vertical gradient of temperature such that the top and underside of the surface plate are at different temperatures.

3. Stands should be located on a stable foundation. the surface plate should be supported firmly and levelled.

4. Care should be taken that, wherever possible, the load on a surface plate is distributed over the working surface.

5. Use should be made of the full available area of the working surface and not concentrated on any one area.a common form of damage to cast iron surface plates is burrs on the working surface. the excess metal may be stoned away by attention confined to the burr. this operation should be followed by thorough cleaning with abrasive dust. if the surface plate is not required for some days, the surface should be coated with a corrosion preventive, such as petroleum jelly. rusting is a sign of neglect and misuse. its effects can be reduced by frequently wiping the top when in use and by occasionally gently rubbing with another surface plate.

6. Users are advised to take advantage of the specialized services of surface plate manufacturers to have surface plates reconditioned.