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The file structure, the types and the use and how to select

time:2013-10-14 source:全工browse:64

The file structure, the types and the use and how to select

Filing is one of the most important basic operation fitter. The scope of filing is; the outer surface of workpiece is filing, filing and surface hole, groove, surface and a variety of complex shape. In addition, there are some inconvenience in mechanical processing, also need to complete the filing. For example, in collision with the process, finishing, repair work on the individual parts, a solution that is cutting processing file. Therefore, filing is one of the most important basic operation fitter.

The structure of 1 file

File material is carbon steel (T12A, T13A) made of. After heat treatment, the hardness of HRC62 ~ 67. Is a professional production of standard tools factory.

File indented single lines and double lines two, double thread cutting cross arranged, forming cutter and the empty grooves, easy cutting and chip removal. Single cut file generally used for filing aluminium thin soft materials.

File work is divided into the knife, knife edge. Knife edge refers to the two side file, have no teeth, some one side of a tooth. No file tooth edges are called the light side, it can make the file without damaging adjacent cut inside right angle side surface.

2 file types

File shape flat, square, triangle, circle, circle. File length, large and small.

The file is divided by use of bench file, special file, file three kinds of plastic. Common file two;

File: file for file cut plane, outer surface.

Square: suitable for filing, square hole groove.

Bench working file, triangular file: suitable for filing triangular groove and greater than the angle 60 degrees.

Half round file: suitable for filing inner surface, circular hole and plane and circular arc.

3 file specification

The file specification level

The file specification according to file of tooth profile tooth pitch size to represent. Tooth thickness grade lines are divided into five types.

I coarse file: pitch is 2.3 ~ 0.83mm. The machining allowance of more than 0.5 ~ 1.0mm use coarse file.

II gear file: pitch is 0.77 ~ 0.42mm. The machining allowance of 0.2 ~ 05.mm in the selection of tooth file.

III fine toothed file: pitch is 0.33 ~ 0.25mm. The machining allowance of 0.1 ~ 02.mm selection of fine tooth file.

Crude oil: IV file tooth pitch is 0.25 ~ 0.2mm. The machining allowance of 0.05 ~ 01.mm thick smooth file selection.

V fine polished file: pitch is 0.2 ~ 0.16mm. The machining allowance in 0.02 ~ 0.05mm selection of fine smooth file.

4 filing method

Filing method refers to the filing surface. File cut surface is flat and curved filing filing.

Plane filing is the most basic filing. Cross filing: margin larger plane rough filing method.

Plane filing Shun filing: on a plane and finishing file filing method.

Filing method were filing: light repair of small plane, finishing, filing method.

Surface: surface filing filing is according to the surface characteristics of the workpiece, file movement to do

Surface cut file can also be called rolling filing.

5 filing requirements

Standing posture and position. The feet stand at attention facing the vise, and vice is the distance from the upper and lower arm in arm vertical, flat file, the file tip can be put on the workpiece, then take the left foot, right foot tip to the foot and the distance is approximately equal to the file length, foot and vice line formed about 30 ° angle, right foot and a Tiger Tong line formed about 75 angle. Filing posture. Both hands flat file, left leg bent, right leg straight, the body center of gravity falls on your left foot, feet should always stand motionless, on his left leg flexion for reciprocating motion. Keep straight motion file. The file on file with the pressure to keep the blade smooth, not to swing up and down. Filing to the target. Not blindly filing, filing process to use measuring or card frequently check file cut surface, do to file place must iron cutting.

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