The T-slot workbench of Beizhong Company, also known as the T-slot plate, is a type of industrial measuring tool primarily used for securing workpieces. It is a cast iron workbench utilized by fitters for equipment debugging, assembly, and maintenance.
Made of high-strength cast iron HT200-300, the working surface hardness is HB170-240. After two artificial treatments (artificial annealing at 600°C–700°C or natural aging for 2–3 years), the product exhibits stable accuracy and excellent wear resistance.
Sizes range from 100*100 mm to 3000*8000 mm (custom specifications are also available upon request).
It complies with national standard metrological verification regulations, categorized into four grades: 0, 1, 2, and 3 (lower values indicate higher precision).
The T-slot workbench surface should be free from rust marks, scratches, impact damage, and other visible defects that could affect its performance.
The T-slot workbench surface should not have casting defects such as sand holes, blowholes, cracks, slag inclusions, or shrinkage cavities. All cast surfaces must be thoroughly cleaned of molding sand, be flat, have firmly applied paint, and all sharp edges should be deburred.
On the opposite sides of the T-slot workbench, there should be provisions for installing handles or lifting points, such as threaded holes or cylindrical holes. When designing lifting points, minimize deformation caused by lifting should be considered.
The T-slot plate should undergo stabilization treatment and demagnetization.
The perpendicular tolerance between the working surface and the sides, as well as between adjacent sides, is Grade 12 (as specified in GB1184-80 "Geometric Tolerances").
The hardness of the T-slot plate working surface should be between HB170-220 or 187-255.
Main inspection items for T-slot plates:
1. Material and surface hardness. 2. Geometric tolerances, including nominal dimensions and perpendicularity tolerance. 3. Appearance. 4. Flatness. 5. Contact spots. 6. Surface fluctuation. 7. Allowable deflection of the working surface. 8. Surface roughness.
Precision parameters:
Grade 3 plates do not specify contact spot requirements. Grade 1 plates require at least 20 contact spots per任意 25*25 mm area. Grade 2 plates require at least 12 contact spots per任意 25*25 mm area.
Usage precautions for T-slot workbenches:
During the production of T-slot platforms, some deviations from the theoretical weight may occur. It is important to ensure that these deviations do not affect the usability of the cast iron plate. Generally, the design of cast iron plates should account for casting and machining errors. The weight deviation of cast iron plates should not exceed 10%. If it exceeds 10%, further quality assessment is necessary to determine whether the cast iron plate can be put into use.
Some product defects may occur during the production of T-slot platforms. As long as proper methods are used, these can be remedied through processing. Defects on the working surface of cast iron plates cannot be overlooked, as they are critical areas. Main defects in cast iron plates include: blowholes, sand holes, sand inclusions, shrinkage cavities, etc. Therefore, when repairing defects in cast iron plates, strict adherence to processing requirements is essential.