Cast iron platform customer usage site

Cast iron platform (also known as cast iron flat plate) is a flat reference tool made of high-strength cast iron as the substrate, processed by aging and precision machining. With its excellent flatness, wear resistance and stability, it is widely used in mechanical manufacturing, metrology and testing, precision assembly and other fields. The following is a detailed introduction to its typical application scenarios:

1. Reference positioning and detection in mechanical processing

In machine tools such as lathes, milling machines, and grinders, cast iron platforms are often used as the "reference surface" for workpieces. Before processing, fix the workpiece on the platform with a fixture, and use the high-precision plane of the platform (flatness up to 0.01mm/1000mm) to ensure the horizontal or vertical positioning of the workpiece, avoiding processing errors caused by clamping tilt. For example, when processing large gear blanks, the platform is used as a positioning reference to calibrate the parallelism between the workpiece end face and the platform through a dial gauge, ensuring the machining accuracy of subsequent gear tooth profiles; For irregular parts (such as mold cavities), the platform can be used with auxiliary tools such as V-shaped blocks and contour blocks to achieve unified benchmarks for multi-faceted machining.

At the same time, the platform is also a detection carrier for processed workpieces. By placing the workpiece on the platform and using tools such as vernier calipers and micrometers to measure its flatness, perpendicularity, or parallelism, it is determined whether the machining meets the requirements of the drawing. For example, when testing the straightness of a machine tool guide rail, place a ruler on the platform and measure the gap between the guide rail and the ruler using a feeler gauge. The data is directly calculated based on the platform plane.

2. Precision assembly and debugging scenarios

In the assembly of instruments and precision machinery (such as CNC machine tool spindle boxes and optical equipment barrels), cast iron platforms are the core tools to ensure the coaxiality and perpendicularity of components. During assembly, the platform provides a stable horizontal reference by adjusting the support bolts to keep the platform in a horizontal state (calibrated with a spirit level), and then placing the components on the platform in the order of assembly, using the platform's planar accuracy to control the assembly clearance. For example, when assembling a gearbox, fix the box body on the platform and calibrate the height difference between the input shaft and the output shaft axis through the platform plane to ensure uniform gear mesh clearance; For optical instruments, the anti vibration design of the platform (such as thickened cast iron layer and bottom damping pad) can reduce vibration interference during assembly and ensure the alignment accuracy of high-precision parts such as lenses.

3. Tooling platform for welding and riveting operations

In the welding or riveting of small and medium-sized metal structures, cast iron platforms can replace traditional welding fixtures as support and positioning benchmarks for workpieces. The T-shaped groove or threaded hole on its surface can be used with fixtures (such as clamps, positioning pins) to quickly fix the workpiece, avoiding dimensional deviations caused by thermal deformation during the welding process. For example, when welding stainless steel pipeline flanges, the platform positions the pipeline axis through a V-shaped block and fixes the flange with a pressure plate to ensure that the perpendicularity error between the two is ≤ 0.1mm/m; For sheet metal parts riveting (such as distribution box shells), the flat surface of the platform can ensure uniform force distribution at the riveting points and reduce workpiece warping.

Compared to ordinary steel plate platforms, cast iron platforms have better high-temperature stability and are not easily deformed after long-term exposure to welding arc high temperatures, making them suitable for batch welding operations.

4. Metrological testing and laboratory calibration

The cast iron platform is the basic equipment of the measuring room, commonly used for the calibration of length measuring instruments such as level gauges, dial gauges, and laser interferometers. For example, when calibrating a frame level, place the level on the platform, adjust the leveling bolt below the platform to center the level bubble, and then use the platform plane as a reference to detect the division value error of the level; When using a laser interferometer to measure the positioning accuracy of a machine tool, the platform serves as the installation reference for the interferometer reflector, and its flatness directly affects the accuracy of the measurement data.

In addition, in physics laboratories, cast iron platforms can be used as mounting bases for precision experimental devices such as optical interferometers and material fatigue testing machines, utilizing their heavy structure (commonly 100-300mm thick) to absorb vibrations and ensure the stability of experimental data.

5. Installation and commissioning of heavy equipment

At the installation site of large equipment such as rolling mills, water turbines, and injection molding machines, cast iron platforms are often used as "temporary reference surfaces" to calibrate the levelness and coaxiality of the equipment. For example, when installing a steel rolling mill frame, place the platform at the bottom of the frame, measure the gap between the platform plane and the bottom of the frame with a level, adjust the thickness of the gasket to make the frame horizontal, and avoid equipment wear caused by uneven force during operation; For split type large machine tools, the platform can assist in calibrating the relative position of each component to ensure that the perpendicularity between the spindle and the worktable meets the design standards.

Its heavy load characteristics (bearing up to tens of tons) and deformation resistance enable it to adapt to the complex environment of industrial sites.