The file is made of carbon tool steel T 12 or T 13 after heat treatment, and then the working part is quenched. It is a small production tool. This is a hand tool for filing workpieces. Used for the micro-machining of metal, wood, leather and other surface layers.
What kinds of documents are there?
1, divided into: general locksmith file for general filing; Wood file, used for filing soft materials such as wood and leather; Plastic file (assorted file) is used to file small and thin metal parts, and a set of files with various cross-sectional shapes; Knitting file of woodworking saw; Special files, such as flat and arched special-shaped files (special files), are straight and curved.
2. Files are divided into flat files (flat files), square files, semi-circular files, round files, triangular files, diamond files and knife files (see figure). Flat file is used for filing plane, cylindrical surface and convex arc surface; Square file is used to file square holes, long square holes and narrow planes; Triangular files are used to file internal corners, triangular holes and planes; Semi-circular file is used to file concave curved surfaces and planes; Circular file is used to file round holes, concave cambered surfaces with smaller radius and elliptical surfaces.
3. According to file types, files are divided into single files and double files. The cutter teeth of single file are inclined at a certain angle with the axis, which is suitable for processing soft non-ferrous metals; The main file and the auxiliary file of the double-edged file are alternately arranged, and are used for processing steel and nonferrous metals. It can divide a wide file into many small pieces to make the file lighter.
4. Files are divided into I ~ V numbers according to the number of main file stripes per 10 mm length, where I is coarse file, II is medium file, III is fine file, and IV and V are smooth files, which are used for rough machining and finishing respectively. The diamond file has no file, but a layer of diamond powder is electroplated on the surface of the file to file hard metal.
What is the structure of the file?
1. File body: the part between the file tip and the file shoulder is the file body. For plastic files without shoulders, the file body refers to the part with file lines.
6. File handle: the part outside the file body.
13. Parallel parts of the file body: the parts where the bus bars of the file body are parallel to each other are parallel parts of the file body.
4. Tip: between the starting point and the tip, the cross-sectional size of the file body begins to shrink gradually. (File body length = tip length+file body parallel part)
⒌ Main file pattern: The file pattern that plays the main cutting role in the file working face is the main file pattern.
Auxiliary file mode: the file mode covered by the main file mode is the auxiliary file mode.
7. Edge file line: The narrow edge of the file or the file line on the narrow edge is the edge file line.
⒏ Oblique angle λ (ω) of the main (auxiliary) file: the acute angle formed by the main (auxiliary) file and the axis of the file body is the main (auxiliary) file oblique angle λ (ω).
⒐ Oblique angle θ of the edge file: the acute angle formed by the edge file and the axis of the file body is the oblique angle θ of the edge file.
⒑ File rows: File rows per10mm in the axial direction of the file are file rows.
⑴ Bottom line of file teeth: On the vertical section perpendicular to the main file pattern, the straight line passing through two adjacent tooth bottoms is the tooth bottom connecting line.
5] Tooth height: the distance from the tooth top to the tooth bottom line is tooth height.
⑶ Tooth rake angle: On the normal plane where the main file passes through the tooth tip, the acute angle formed by the intersection of the cutting edge surface of the file tooth and the normal plane and the vertical line connecting the tooth bottom is the tooth rake angle.
Dimensions and specifications of documents
The specification of locksmith file refers to the length of file body.
The specification of special-shaped file and plastic file refers to the full length of the file.
The assembler files the body (the distance from the file tip to the file shoulder). In terms of length, there are several specifications: 100 ~ 150 mm, 200-300mm and 350-450 mm
The full length of special-shaped files and plastic files are specifications. The basic dimensions of a file mainly include width and thickness. For circular files, diameter.