T-groove plate surface is the workpiece and fixture positioning benchmark, and the movement between the direction of a certain relationship, in order to make the workpiece and the cast iron flat working surface of the surface of the cast iron platform, The flatness of the worktable is generally concave, and the maximum value of the straightness error on the work surface in all directions (vertical, horizontal, diagonal, radiation) is taken as the flatness error of the work surface. And rail straightness measurement method is basically the same.Use point method, plug-foot method, level and optical flatness and other methods of inspection.

Cast iron platform is widely used in the construction industry, the printing industry, hydraulic equipment, construction industry, railway locomotive, equipment production, electronics, petrochemical, automotive, ceramics, railway locomotives, etc. In the course of use should avoid local wear Excessive, scratches and bumps, and affect the plane accuracy and service life, cast iron test platform life under normal conditions should be long-term use. Should be cleaned after use, do a good job in anti-rust work to maintain service life .

Cast iron plate It is specially designed for the flattening of large equipment with reasonable design, stable structure, high precision and abrasion resistance. It can be used for flattening from 3000mm to 6000mm, and the products are made by scraping or grinding. Measurement, and grinding of machining centers, tooling workshops, machine tools (inspection) workshops, large-sized equipment bases, measuring chambers and precision machining, and accurate measurement and inspection of the flatness, flatness and angle tolerance of workpieces. .

Repair mold / cast iron platform T-groove flat work surface is the workpiece and fixture positioning reference, and the direction of movement and there is a certain relationship between the workpiece and the cast iron flat face in close contact with the plane, the surface flatness of the work surface, (Vertical, horizontal, diagonal, radiation) on the straightness error in the maximum value as the work surface of the flatness of the error.The measurement method and guide the straightness of the measurement The method is basically the same.Use point method, plug-foot method, level and optical flatness and other methods of inspection.

Cast iron platform technical requirements:

1, the platform must be subjected to two back stress stress aging treatment, to prevent the deformation of stress memory distortion and the platform used in the future into the phenomenon of cracks in the occurrence of the elimination of casting stress, the purpose of rough stress, stress relief more than 90%

2, the end of the working face after the acute blunt;

3, the surface of the castings to be non-processing of non-greasy, polished, the inner surface are required to paint anti-rust paint;

4, flat face can not seriously affect the appearance and performance of sand holes, pores, cracks, slag, shrinkage, scratches, bumps, rust and other defects.

3, the accuracy grade 0 ~ 3 flat working face, the diameter of less than 15mm of sand holes allow the same material blockage, the hardness should be less than the hardness of the same material.Faceface blocked sand holes should not be more than 4 And the distance between the sand holes should not be less than 80mm.

4, the plate should be used high-quality fine gray cast iron or alloy cast iron and other materials, the face hardness should be 170 ~ 220HB.

5, the flat face is usually applied to use scraping process.For scraping of the three-stage flat surface, the surface roughness of the maximum allowable value of Ra is 5чm.

7, the flat face with the scraping process should be carried out on the color of the test. The proportion of the contact area after the inquiry shown in Table 3, or 25mm × 25mm in the number of points of contact should not be greater than 5 points Controversial, according to the ratio of contact area for the assessment basis.

8, the plate relative to the two sides, should be installed handle or ring device screw hole (or cylindrical hole), and the device location should be designed to minimize the deformation caused by handling.

9, if the flat working surface set screw hole (or groove), the site should not be higher than the face.

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