The trowel has many fine teeth and bars on the surface for hand tools that can be used to polish the workpiece. Used for micro-processing of the surface of metal, wood, leather, etc.
The application of the sickle was very early. The oldest sickle that had been discovered was a bronze sickle from Egypt around 1500 BC.
Modern boring tools are generally made of carbon steel processed by rolling, forging, annealing, grinding, boring and quenching. The boring tool is made of t12 steel and has a hardness of 62-64 after surface hardening.
There are many types of files.
1 According to the purpose: There are ordinary fitters for general boring; For wood, for boring wood, leather and other soft materials; For plastic burrs (assorted burrs) for boring small, fine metal parts There are many trowels with various cross-section shapes; a sharpening knife for woodworking saws; special trowels, such as trowels for repairing special-shaped flat and bowed shaped ridges (special boring), with straight and curved shapes.
2 The boring tool is divided into a flat file (flat file), a square file file, a semicircle file file, a round file file, a triangular file file, a diamond file, and a knife file according to the sectional shape (see the figure). The flat file is used to plan the plane, the outer circle surface, and the convex arc surface; the square beam is used to square the square hole, the rectangular hole, and the narrow plane; the triangular file is used to bend the inner angle, the triangular hole, and the plane; the semicircular file is used to warp the concave arc surface. And plane; round cymbals are used for boring round holes, concave arc surfaces with small radius, and elliptical surfaces.
3 Scythes are divided into single and double lines according to the pattern. The cutter teeth of the monofilament rake are inclined at an angle to the axis and are suitable for processing soft non-ferrous metals; the main and auxiliary ridges of the double-row trowel are arranged crosswise for processing steel and non-ferrous metals. It can divide the wide swarf into many small segments, making the boring easier.
4 The files are divided into I to V numbers according to the number of main strips per 10 mm length, including I for rough teeth, II for medium teeth, III for fine teeth, and IV and V for shine. , respectively for roughing and finishing. The diamond file has no ridges, but only a layer of diamond powder is plated on the surface of the file to etch the hardened metal.
The application of the sickle was very early. The oldest sickle that had been discovered was a bronze sickle from Egypt around 1500 BC.
Modern boring tools are generally made of carbon steel processed by rolling, forging, annealing, grinding, boring and quenching. The boring tool is made of t12 steel and has a hardness of 62-64 after surface hardening.
There are many types of files.
1 According to the purpose: There are ordinary fitters for general boring; For wood, for boring wood, leather and other soft materials; For plastic burrs (assorted burrs) for boring small, fine metal parts There are many trowels with various cross-section shapes; a sharpening knife for woodworking saws; special trowels, such as trowels for repairing special-shaped flat and bowed shaped ridges (special boring), with straight and curved shapes.
2 The boring tool is divided into a flat file (flat file), a square file file, a semicircle file file, a round file file, a triangular file file, a diamond file, and a knife file according to the sectional shape (see the figure). The flat file is used to plan the plane, the outer circle surface, and the convex arc surface; the square beam is used to square the square hole, the rectangular hole, and the narrow plane; the triangular file is used to bend the inner angle, the triangular hole, and the plane; the semicircular file is used to warp the concave arc surface. And plane; round cymbals are used for boring round holes, concave arc surfaces with small radius, and elliptical surfaces.
3 Scythes are divided into single and double lines according to the pattern. The cutter teeth of the monofilament rake are inclined at an angle to the axis and are suitable for processing soft non-ferrous metals; the main and auxiliary ridges of the double-row trowel are arranged crosswise for processing steel and non-ferrous metals. It can divide the wide swarf into many small segments, making the boring easier.
4 The files are divided into I to V numbers according to the number of main strips per 10 mm length, including I for rough teeth, II for medium teeth, III for fine teeth, and IV and V for shine. , respectively for roughing and finishing. The diamond file has no ridges, but only a layer of diamond powder is plated on the surface of the file to etch the hardened metal.
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