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Bench working file pin and the matters needing attention

time:2013-10-14 source:全工browse:195

Bench working file pin and the matters needing attention

Application, filing.

For machining on the workpiece surface with a file, make it reach the requirements of the drawings of parts shape, size and surface roughness, the processing method called filing, filing is simple, wide working range, after used for chipping, sawing, filing can be processed on the plane, on the workpiece surface, internal and external circular arc, trench and other complex surface, the highest precision can reach IT7-IT8 filing, the surface roughness of Ra1.6-0.8 μ M. Can be used for forming model, mould and parts, trimming machine workpiece assembly, one of the main operation method is fitter.

Two, the file

Material and structure of the 1 file

Carbon tool steel commonly used file T10, T12 is made, and the heat treatment quenching to HRC62 ~ 67.

File by file, file, file, the file tail edge of the tongue, wooden handle and other parts. The file size to file the working length to represent. The tooth is cutting out file in file chopping machine.

2 file types

The file is divided into different purposes: ordinary file (or fitter file), special file and reshaping file (or assorted file) three. The most common file.

Common file is divided into different cross-sectional shapes: flat file, Fang Cuo, round, half round file and file five; according to its length can be divided into: 100, 200, 250, 300, 350 and 400mm seven; according to the tooth profile can be divided into: single tooth, double indented (mostly use double indented); according to the tooth dense vegetables can be divided into: coarse, fine teeth and shiny file (file size that, for every 10mm long tooth tooth tooth to rasp ranged from 4 to 12 teeth, tooth is 13 to 24 teeth, smooth file is 30 ~ 36 teeth).

The 3 file

Reasonable selection of file, to ensure the machining quality, have a great impact and improve the work efficiency and prolong the service life. The general principle is selected file:

(1) according to the selected file shape and size of workpiece and machining surface:

(2) according to the processing of soft and hard materials, machining allowance, accuracy and surface roughness requirements choose file size. Rasp of pitch, not easy to be blocked, suitable for rough machining (i.e., machining allowance, precision and surface quality requirements of low) and copper, aluminum and other soft metal filing; fine file suitable for steel, cast iron and the workpiece surface quality requirements of high filing; smooth file is only used to fix the light the machined surface, the file is fine, the surface of the workpiece file out of the light, but the lower the productivity.