Ground track channel iron

A brief discussion on the technical requirements summary of channel iron
The bottom design of the channel iron includes side plates and rib plates to enhance the stability of the iron floor. The interior of the iron floor must be designed with reinforcing ribs, typically spaced at 500mm intervals. For smaller specifications of channel iron, the design can be adjusted according to actual conditions. The bottom design of side plates and rib plates is intended to improve the stability of the iron floor. The cast iron mold used for channel iron includes several reinforcing ribs, which are located at the bottom of the body corresponding to the bottom end of the casting channel, with the upper end of the reinforcing ribs fixed to the bottom of the body.
In this case, to ensure that the channel iron has a practically flat surface. Straightness deviation can also be checked with a ruler and a dial indicator. During inspection, first place the square ruler above the surface of the channel iron. Then place the dial indicator and bracket, which can read tolerances, above the working surface of the channel iron being inspected, and ensure that the measuring head of the dial indicator contacts the square ruler. When moving the bracket with the dial indicator, the straightness deviation of the inspected iron floor surface can be observed.

Introduction to the surface of channel iron, which is generally processed after fine grinding. During manual grinding of the surface, the grinding compound is applied to the channel iron (lapping tool), and the workpiece is moved in a straight reciprocating motion or a figure-eight pattern. After grinding for a certain period, the channel iron workpiece is rotated 90° to 180° to prevent tilting. For localized surfaces such as flat areas, square holes, and narrow slots on the workpiece, the iron floor lapping tool can also be used manually. For larger batches of simple parts, the surfaces can be ground on a surface grinding machine.
When the iron floor is not in use, the working surface should be cleaned promptly, then coated with a layer of rust-proof oil and covered with anti-rust paper. When covering the iron floor with the outer packaging of the channel iron, care must be taken to avoid damaging the working surface of the channel iron. The iron floor should be installed in a ventilated, dry environment, away from heat sources, corrosive gases, and corrosive liquids. What factors cause the accuracy of the iron floor to fail to meet usage requirements? Incorrect installation and adjustment of the channel iron can result in its accuracy not meeting the customer's intended use.
Its hardness is 2-3 times higher than that of cast iron (equivalent to HRC > 51), thus ensuring good precision retention. Even if struck by heavy objects during use, stone tools may only lose a few grains of debris, unlike metal tools, which can deform and lose accuracy. It is superior to iron floors and steel-made precision measurement reference components, enabling high and stable accuracy.
At the same time, channel iron liquid-formed parts require minimal machining allowance, saving metal. However, the liquid forming process for metals involves multiple steps and is difficult to control accurately, leading to inconsistent quality of castings. Compared to forgings of the same material, liquid-formed parts have a loose structure and coarse grains, making channel iron prone to internal defects such as shrinkage cavities, shrinkage porosity, and gas pores. Its mechanical properties are relatively low. Additionally, the labor intensity is high, and working conditions are poor. It possesses excellent mechanical and physical properties, offering a combination of various strengths, hardness, and toughness, as well as one or more special properties such as wear resistance, low temperature resistance, etc.
The working surface of the channel iron must not have defects that severely affect its appearance and usability, such as pores, sand holes, cracks, or rust.
The formation of channel iron: The iron floor is sourced from underground layers, which have undergone natural aging over hundreds of millions of years, resulting in a highly stable form that is not prone to deformation due to常规 temperature differences. The granite material, selected through strict physical testing, has fine crystals and a hard texture, with a compressive strength of 2290-3750 kg/cm² and a Mohs hardness of 6-7. It is wear-resistant, acid-resistant, alkali-resistant, highly durable, and will never rust. As a non-metallic material, it has no magnetic reaction and no plastic deformation.
Weiyue Machinery, Ms. Xie, 15350773479