Methods for Quality Inspection of Cast Iron Platforms

1. The working surface should not have casting defects such as sand holes, pores, cracks, slag inclusions, and shrinkage porosity. All casting surfaces should be made of QINGCHU sand, with a smooth surface and firm painting. Each edge should be blunt. At an accuracy level lower than '; 00" On a flat working surface, sand holes with a diameter less than 15mm are allowed to be blocked with the same material, and their hardness should be lower than that of the surrounding materials. The number of blocked areas on the work surface should not exceed four, and the distance between them should not be less than 80mm.

2. The working surface should not have rust (XIUJI), scratches (HUAHEN), bumps, or other appearance defects that affect use.

3. According to user requirements, after setting threaded holes or grooves on the working surface of the board, these parts should not have protrusions higher than the working surface.

4. YOUZHI fine-grained gray cast iron or alloy cast iron should be used for manufacturing.

5. On opposite sides, threaded or cylindrical holes should be provided for installing lifting facilities such as handles and rings. When designing the lifting position, consideration should be given to minimizing changes caused by lifting.

6. The hardness of the working surface should be HB 170-220.

7. The working face should adopt scraping technology, for; 3" The level flat working surface can also adopt planing technology, and the surface roughness of the planing working surface should have an arithmetic mean deviation Ra value of no more than 5um according to the contour

8. It should undergo stability treatment and demagnetization.

Flatness: Can be divided into laboratory level (Reference), calibration level (Master), and tool room level (Working) SANJI

Flat grinding: In the early days, people used three platforms to match each other to produce a true flat surface. A skilled and patient stonemason can produce an incredible level of flatness by performing multiple 90 degree rotations using three matching platforms without the need for any measuring instruments.

Flatness:

1. AA level: Its flatness (μ m)=1+1.6D2 (D is the diagonal length or diameter of the platform), used for measuring height JINGMI, commonly used in laboratories.

2. Grade A: Its flatness is twice the error of Grade AA, commonly used for inspecting JINGMI measuring tools in tool inspection laboratories.

3. B level: Its flatness is four times the error of AA level, commonly used in tool inspection rooms or on-site inspection of measuring tools or marking.

Hebei Fengquan Machinery; Cast iron measuring tools, cast iron platform plates; Manufacturer of cast iron brackets. Main products: 3D welding platforms of various specifications and materials, cast iron flat platforms, scraping and grinding plates, inspection plates, marking plates, riveting and welding plates, assembly plates, T-shaped groove plates, three-dimensional plates, machine tool workbenches, machine tool shims, cast iron bending plates, square boxes, square rulers; Measuring tools such as flat rulers, V-shaped iron, V-shaped frames, jacks, special wrenches, various mechanical test benches, mechanical sliding tables, granite flat plates, marble flat plates, granite square boxes, machine tool inspection rods, various ring gauges, plug gauges, sine gauges, etc., and undertaking various casting (customized according to drawings), mechanical processing, and machine tool castings; Flat measuring tools and machine tool scraping and grinding maintenance business.

Quality first, integrity-based, is our service tenet. We adhere to the principle of putting morality first, always insisting on demanding product quality, and repaying our customers with low prices and perfect after-sales service. We are willing to assist our colleagues with a sincere heart, work together for development, and create brilliance.

Our company is willing to work closely with customers, join hands and forge a brilliant tomorrow together. Welcome new and old customers to visit our factory for guidance! Contact phone number: 15832737060 Manager Yang