An article to quickly understand what a channel iron is!
The quality of channel iron is important for every customer who uses it. The grades of channel iron are divided into Grade 0, Grade 1, Grade 2, etc. The grade requirements for channel iron are relatively high, making it suitable for use. Precautions when cleaning channel iron: resin sand molds have good rigidity, and the high strength of the sand mold during the initial pouring stage allows for the utilization of graphite expansion during the solidification process, effectively eliminating shrinkage cavities and porosity issues, enabling the casting of ductile iron with fewer or no risers. In actual casting production, foam patterns are used with furan resin self-hardening sand for molding.
In practical use, channel iron can be categorized in detail. The raw materials used for channel iron are sourced from cast iron plates, which undergo aging treatment. Their structure is uniform, with minimal internal stress, ensuring that the channel iron is completely free from internal stress, does not deform, and thus maintains high precision. It has high hardness, good rigidity, strong wear resistance, resistance to acid and alkali corrosion, does not rust, requires no oil coating, is not prone to dust adhesion, is easy to maintain and care for, does not scratch during use, is unaffected by constant temperature conditions, and maintains measurement accuracy even at room temperature. It is non-magnetic, moves smoothly during measurement without any sticking sensation, is unaffected by moisture, and combines various advantages such as stable flatness. Therefore, the channel iron in marble platforms serves as a reference plane for precision measurement in production workshops or metrology departments.

What causes channel iron to deform? The deformation of channel iron may occur due to inadequate stress relief annealing or aging after sand casting. It could also be caused by uneven support during use, leading to uneven force distribution at the four corners of the channel iron and resulting in deformation. The solution is to reapply aging treatment to the channel iron, strive for a reasonable structural design, and minimize casting stress as much as possible. Sometimes, counter-deformation measures are adopted during pattern manufacturing to control and adjust. Residual casting stress is commonly relieved through natural aging or artificial aging methods. To eliminate internal stress in channel iron, the deformed cast iron plate is reprocessed to restore its original precision. During use, the four corners of the cast iron plate should be evenly supported to prevent deformation again.
Although inspection channel irons are all reference planes, their processing methods, flatness accuracy, and functional roles differ. Cast iron plates serve as reference surfaces when inspecting workpiece straightness using the coloring method or as auxiliary tools for various measurements. Cast iron plates are suitable for various inspection tasks, serving as reference planes for precision measurements, used as measurement benchmarks for machine tool inspections, checking dimensional accuracy or form deviations of parts, and for precise marking. Channel iron is an indispensable basic tool in mechanical manufacturing. For example, it serves as a reference plane for precision measurements, inspection and measurement of various machine tools, checking dimensional accuracy and positional deviations of parts, and performing precise marking. Channel iron is an essential product in over 20 industries, including mechanical manufacturing and electronic production.
During use, care should be taken to avoid excessive impact between the workpiece and the working surface of the single-surround channel iron to prevent damage. The weight of the workpiece should not exceed the rated load of the single-surround channel iron, as this could reduce work quality and potentially damage or deform the channel iron, rendering it unusable. Channel iron components should slide smoothly during measurement without any sticking sensation. General scratches on the working surface do not affect measurement accuracy.
Weiyue Machinery, Ms. Xie 15350773479