Not many people give much thought to the fact that almost every object you touch as you go about your day had to be manufactured by someone. When you stop to consider the impact that the processing and manufacturing industry has had on the modern world, it can blow your mind. My mind was blown when my son arrived home from his new job at a local processing and manufacturing plant and told me about the industry he was now working in. Since then, I have learnt all kinds of cool things which I would love to be able to share with the rest of the world.
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Cast iron is one of the highly used strains of iron in modern process and manufacturing applications. It comprises iron-carbon alloys containing at least two per cent of carbon content. Thanks to this carbon content, cast iron has remarkable metallic attributes including brittleness, good fluidity, wear-resistance and machinability. These qualities are a testament of cast iron's dominance in the engineering world. It has widespread use in applications like plumbing pipe and automotive parts manufacture. These parts include cylinder heads and gearbox cases. In this piece, the focus is on metal stitching, a repair technique you can use to repair your damaged cast iron parts:
Perform Crack Tests
Metal stitching your cast iron parts starts with performing crack tests on the damaged section. The objective is to map the damaged areas and capture every inch of the section that requires stitching. The fastest way to do this is by inspecting the area with a magnifying glass. It enables the fabricator to spot hairline cracks that would be difficult to spot with a naked eye. Dye penetrant also comes in handy at this stage. The fabricator pours the dye over the iron's surface and allows it to settle before checking the metal's alternate side. Any cracked section will allow the dye to pass through.
When you finish mapping out the area with cracks, crop it out of the main component. Ensure you leave smooth, clean edges for the incoming replacement parts.
Prepare the Replacement
The next step involves the preparation of the cast iron insert. The insert must match the original casting precisely by adhering to all the dimensions of the casting you extracted. After that, the replacement casting is brought in and fit into the void left by the one taken out. The fabricator checks the fitting of the new casting to ensure that it seals the area appropriately.
Stitching Begins
The next step is the commencement of the stitching process. The fabricator drills holes with the insert in place to accommodate the stitching pins along the seam between the insert and the rest of the equipment. They follow up by screwing the pins into position such that the pins draw the casting from all sides as the fabricator tightens them.
Finishing Touches
The finishing touches involve the insertion of the locks. The fabricator machines the stitched seam to enhance a good finish and relieve it of the stress caused by the initial processes. The machining process also clears the surface and enables the fabricator to confirm that no cracks remain on the material.
Reach out to a local metal repairer to learn more about this process.
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