The T-slot bed plate also called T-slotted plate, is a kind of cast iron plate with a T-slotted surface, used for assembly, debugging machinery, and equipment, cast iron T-slotted bed plate table, and scribing platform strictly implement the relevant national industry standards, the use of high-strength cast iron casting, not only stable accuracy, and durable.
A T-slot bed plate table is a kind of industrial gauge, mainly used to fix the workpiece, and is used by the clamp workers to debug the equipment, assembly equipment, maintenance equipment, and the basic work platform.
The role of the T-slot bed plate: fixed workpiece
Tools: industrial gauges
What is T-slot bed plate material?
The T-slot bed plate is made of high-strength cast iron HT200-300 with working surface hardness HB170-240, which is artificially treated twice (artificial annealing 600 degrees-700 degrees and natural aging 2-3 years), and the working surface of the T-slot platform adopts a scraping process.
T-slot bed plate working surface can be processed V-shaped, T-shaped, U-shaped groove and a round hole, long hole, etc., which can be used to fix power mechanical equipment. The accuracy of using this product is stable and the wear resistance is good.
T-slot bed plate working surface is processed with T-slot, mainly used to fix the workpiece, is used by the clamp workers to debug the equipment, assembly equipment, maintenance equipment, and the basic work plane.
High strength cast iron HT200-300 working surface hardness of HB170-240, after two artificial treatments (artificial annealing 600 degrees – 700 degrees or natural aging 2-3 years) use the product precision stability, good wear resistance.
Some cast iron T-slot bed plate table working surface is scraping and researching process, using the method of color coating for inspection, to ensure the accuracy of the plane.
The T-slot bed plate is widely used in the assembly, debugging, welding, and riveting of power mechanical equipment, the surface of this product with a T-slot table, can be fixed mechanical equipment.
What are the T-slot bed plate specifications?
100*100-3000*6000 (also can be made into other specifications according to actual requirements)
|T-slot bed plate specifications|
What is T-slot bed plate accuracy grade?
According to the national standard metrological verification regulations, respectively, 0, 1, 2, 3 four levels (the smaller the value the higher the precision)
What is T-slot bed plate Flatness level?
The flatness of the T-slot bed plate can be divided into:
① AA level: its flatness (μm) = 1 + 1.6D2 (D is the diagonal length or diameter of the platform), used for highly precise determination, commonly used in the laboratory.
② Grade A: The flatness is twice the error of grade AA, commonly used in the tool inspection room for precision gage inspection.
③ Grade B: its flatness is four times the error of the AA level, commonly used in tool inspection rooms or in the field to test gauges or scribing.
Flatness calculation formula
000 level: 1 × (1 + d / 1000) 1 level: 8 × (1 + d / 1000)
0 0 level: 2 × (1 + d / 1000) 2 level: 16 × (1 + d / 1000)
Grade 0: 4×（1+d/1000）Grade 3: 40×（1+d/1000)
What are the technical requirements of the T-slot bed plate?
- T-slot bed plate working surface shall not have defects such as sand holes, pores, cracks, shrinkage, scratches, bruises, rust spots, etc. that seriously affect the appearance and use.
- The surface of the T-slot bed plate should be cleared of type sand and smooth and painted firmly.
- The working surface of the T-slot bed plate with accuracy grade 0-3, the sand hole with a diameter less than 15mm is allowed to be blocked with the same material, and its hardness should be less than the hardness of the surrounding material. The sand holes blocked on the working surface should be no more than 4, and the spacing between sand holes should be no less than 80mm.
- T-slot bed plate should be made of high-quality fine gray cast iron or alloy and other materials, and the hardness of its working surface should reach 170-220HB.
- T-slot bed plate working surface should usually adopt a scraping process. The maximum allowable value of the surface roughness Ra is 5um for the working surface of the T-slot platform with a scraping process of grade 3.
- Using the scraping process should be color coated for research inspection.
The ratio of the contact point area shown after the research is shown in the provisions of Table 3: or by 25mm × 25mm square area of the contact points are shown in the provisions of Table 3, and any 25mm × 25mm in between the contact points should not be greater than 5 points.
What is the T-slot bed plate production process?
First, T-slot bed plate blank: according to the technical requirements of the drawing, according to the drawing of the production of wood type, batching, modeling, drying, casting, falling sand, cleaning, an inspection of all parts of the blank.
Second, cast iron plate machining: appearance inspection and scribing, processing, inspection.
Third, cast iron plate workpiece leveling, manual scraping and research, and inspection section inspection.
Fourth, is the appearance of cast iron plate processing, painting, packaging, and storage.
T-slot bed plate bearing requirements: cast iron plate bearing is the deformation deflection of the cast iron plate after the weight per unit area of the cast iron plate.
In order to facilitate understanding, we can see the cast iron plate put the workpiece, without affecting the normal use of the situation, the pressure that the cast iron plate can withstand.
- There should be no rust, scratches, bruises, and other appearance defects on the working surface of the T-slot plate that affect its use.
- T-slot plate working surface should not have sand holes, pores, cracks, slag and shrinkage, and other casting defects. The casting surface should be thoroughly removed from the sand, and the surface is smooth, painted firmly, the tax edge should be repaired blunt.
- T-slot on the opposite sides of the surface of the plate, there should be installation handle or lifting position settings, threaded holes, or cylindrical holes. When setting the lifting position should be considered to minimize the deformation caused by lifting.
- T-slot plate should be processed by stability and demagnetization.
- T-slot plate working surface and the side and the adjacent sides of the vertical tolerance of 12 levels (according to GB1184-80 “shape and position tolerance”).
- T-slot plate working surface hardness should be between HB170-220 or 187-255.
- T-slot main calibration items
- Material and surface hardness.
- Shape and position tolerance, including nominal size, and verticality tolerance.
- Contact spot.
- Plane-wave momentum.
- Allowable deflection value of the working surface.
- Surface roughness.
- Accuracy parameters.
3 level flat plate does not specify the contact spot requirements:
Level 1 plate requires a contact spot number in any 25 × 25mm plane not less than 20 points.
Level 2 plate requires a contact spot number in any 25 × 25mm plane not less than 12 points.
T-slot platform in the production process will produce part of the theoretical weight deviation, it is important to note that the deviation of the cast iron plate is not affected by the use of cast iron plate.
General cast iron plate design should take into account the casting error and machining error, cast iron plate weight error generally shall not exceed 10%, more than 10%, we have to do further identification of the quality of cast iron plate to determine whether the cast iron plate can be put into use.
The T-slot bed plate production process will appear some product defects, as long as the correct method can be used to make up for the process, cast iron plate working surface defects are important parts that can not be ignored, cast iron plate defects include porosity, sand holes, sand trapping, shrinkage, etc. So the defects of the cast iron plate to do the repair in strict accordance with the process requirements.
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