Filing is a method of cutting workpieces with filing tools. The filed tools are mainly files. The files are made of carbon tool steel materials, and the hardness of the cutting part reaches 60-70HRC after heat treatment. The file consists of a file surface, a file edge, a file tongue and a wooden handle. The filing method mainly includes a planar filing method, an arc filing method, and a spherical filing method.
Pay attention to the following points when filing.
â‘ Use one side of the new file first, then use the other side after blunt use.
â‘¡When roughing the file, the effective full length of the file edge should be fully used, which can not only improve the file efficiency, but also avoid local wear of the file teeth.
â‘¢ Do not get oil or water on the file. When the filings are inserted into the tooth gap, they must be removed along the lines of the filings with a wire brush. You cannot blow the filings with your mouth or touch the file and the surface with your hands.
â‘£The file with no handle and damaged can not be used, let alone use the file as a hammer or crowbar.
⑤ The oxide layer of hard metal and workpiece cannot be filed with a new file. If there is hard skin on the surface of the casting, it should be ground off with a grinding wheel or the toothed side of the old file to remove the hard skin, and then the normal filing process.
â‘¥The file must be cleaned after each use to avoid rust. The file should be placed in a dry and ventilated place during use or when placed in the tool box. It cannot be stacked or stacked with other tools or workpieces to avoid damage to the file.
⑦The workpiece must be clamped firmly before filing, but the workpiece cannot be deformed or pinched. When clamping workpieces with irregular surface shapes, pads should be added; when clamping processed surfaces and precision parts of workpieces, materials such as copper skin should be lined.
Sawing is a method of cutting a workpiece using a saw blade tool. The sawing tool is mainly a saw blade. The correct installation of the saw blade is as follows: â‘ The saw teeth must be forward. â‘¡ The tightness should be proper. Generally, the saw blade is pulled by hand, and it feels hard to bend. â‘¢ The assembled saw blade should be in the same center plane as the saw bow.
When the seam depth exceeds the height of the saw bow, it belongs to deep seam cutting. When sawing, the workpiece should be clamped on the left side of the bench vise, and the sawing seam should be parallel to the side of the jaw, with a distance of about 20mm. It is necessary to clamp the work piece to prevent the work piece from deforming or pinching the work piece, and also to prevent the saw blade from damaging the saw blade and affecting the quality of the saw seam during the sawing of the work piece. Turn the saw blade through 90 ° before the saw bow hits the saw gap, make the saw blade plane perpendicular to the saw bow plane, re-clamp, turn the saw bow to the left side of the workpiece and then saw, with the saw teeth facing the inside of the saw bow, continue Sawing.
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