How to use the file correctly? How to use the file and the posture

1) According to the different geometry and specific conditions of the processed workpiece, select the file.

And install the file handle, the depth of the file handle installation hole is about equal to the length of the file, and the diameter of the hole should make the file tongue can be freely inserted into the depth of 1 2.

2) Clamping the workpiece, the workpiece is clamped in the middle of the vise jaw, slightly higher than the jaw. For clamping machined surfaces, copper or zinc sheets are inserted. For workpieces that are prone to deformation, auxiliary materials are used to find clamping.

3) Filing method, the correct filing method contains the following three contents:

1) Mention of files: Due to the different sizes and shapes of various files, their grips are also different.

How to hold the file: the palm of the right hand is against the end of the file handle, the thumb is placed on the top of the file handle, the other four fingers are bent below, and the thumb is combined to pinch the file handle. The left hand has a variety of postures depending on the size of the file and the severity of the force.

Grip of the middle file: The right hand grip is the same as the grip of the big file, and the left hand pinches the tip of the file with the thumb and index finger.

How to hold the small file: the index finger of the right hand is straight, the thumb is placed on the surface of the wooden handle of the file, the index finger is leaning against the edge of the file, and the fingers of the left hand are pressed in the middle of the file.

2) The posture of using the file: when using the file, it is necessary to stand naturally and be easy to exert force, the center of gravity of the body should fall on the left foot, straighten the right knee, and the foot should always stand firm without moving, and the left knee should be bent and extended with the reciprocating movement of the file. When filing, stand still with both feet, reciprocate the body by flexing and extending the left knee, and the movement of the arms and body should be coordinated with each other, and the full length of the file should be fully utilized.

To start filing, lean your body forward about 10 degrees, with your left elbow bent and your right elbow back. When the file pushes out 1 3 stroke, the body is tilted forward about 15 degrees, at this time the left leg is slightly straight, the right arm is pushed forward, when pushed to 2 3, the body is tilted to about 18 degrees, and finally the left leg continues to bend, the right elbow is gradually straightened, the right arm is forward to make the file continue to advance to the end, and the body returns to the 15 degree position with the reaction direction of the file.

3) The application of filing force: when filing the plane, in order to keep the file balanced on the workpiece, the pressure of the right hand must gradually increase with the advance of the file, and the pressure of the left hand is the opposite. During the filing process, the movement of the file should be straight, and the key is to constantly adjust the pressure of the left and right hands to balance the torque at both ends of the file.

No pressure is applied during the file return trip to reduce the wear of the file. The correct application of filing force is the key to filing. There are two types of filing forces: horizontal thrust and vertical pressure.

The thrust is mainly controlled by the right hand, and its magnitude must be greater than the cutting resistance to file the chips. The pressure is controlled by both hands, and its role is to penetrate the file deep into the metal surface. The magnitude of the two pressures must also be equal to the torque of the pressure of the two hands on the center of the workpiece, which is the key to ensure the straight movement of the file.

The method is that as the file advances, the pressure of the left hand should gradually decrease from large, and the pressure of the right hand should gradually increase from small to small, until the middle of the two hands is equal.

To prolong the file.

service life. It is not allowed to use constellations to the wrong hard metal. Do not use a file to file and quench the material. Wrong fine files do not allow the filing of soft metals. so as not to break.

1. When filing, the workpiece is clamped at the height of the vise, and the elbow is placed on the upper plane of the jaw and the fingers just touch their jaws.

2. Use coarse files and semi-fine files for rough processing, and use fine files, finest files or assorted files for finishing processing. When processing soft metals, coarse files are used.

3. The force of pushing the file should be uniform and stable, and it should not be shaken. Press down hard when pushing forward, and don't apply pressure when pulling back.

4. In order to avoid uneven processing performance, the filing direction of the file should be changed and crossed, and the flat ruler should be placed on the processing surface at any time for light inspection. If you need to file two planes that are perpendicular to each other or parallel to each other, first file one plane and then file the other plane, and check their angle or parallelism with an angle ruler and micrometer at all times.

5. When filing the inner arc surface, the file should complete three movements at the same time, that is, forward movement, move along the arc to the left or right, and rotate around the file line. All three movements must be performed at the same time in order to file the inner arc surface.

The matters to be paid attention to in the use of the file are: 1. It is not allowed to use a new file to break the hard metal; 2. It is not allowed to use a file to frustrate quenching materials; 3. Forgings and castings with hard skin or sticky sand must be ground off on the grinder before they can be filed with a semi-sharp file; 4 Use one side of the new file first, and then use the other side when the surface is blunted, 5 When filing, use a wire brush to remove the chips on the file teeth frequently, 6 The file should not overlap or stack with other tools; 7 When using the file, it should not be too fast, otherwise it is easy to wear out prematurely, 8. The file should avoid water, oil or other dirt; 9 Fine files are not allowed to file soft metals; 10 Do not use too much force in the use of assorted files to avoid breaking.

The usage and posture of the file are as follows:

How to use: Hold the file handle with your right hand and rest your left palm on the rubber surface of the file. Hold the file and tucked your right arm to your waist. Hold the file handle tightly with your right hand, hold the file with your left hand, and press forward with your waist. Rub forward, not backward.

Note: The workpiece should be clamped in the middle of the jaw width direction of the vice as much as possible. The filing surface is close to the jaws to prevent vibration of the workpiece during filing, especially for thin workpieces. The clamping workpiece should be stable, but not too much force to prevent the workpiece from deforming.

File Introduction:

File is a kind of hand tool used to file workpieces, with many fine teeth and strips on the surface, mainly used for micro-processing of metal, wood, leather and other surface layers.

There are many fine tooth and bar shapes on the surface, and it is a hand tool used to file the workpiece. It is used for micro-processing of metal, wood, leather and other surface layers.

The application of files is very early, and the oldest file that has been discovered is a bronze file from Egypt around 1500 BC. Modern files are generally made of carbon steel through rolling, forging, annealing, grinding, chopping and quenching. The file is made of T12 steel, which has a hardness of 62 64 after surface quenching.

File. It is a hand tool used to file workpieces.

The file is made of carbon tool steel T12 or T13 after heat treatment, and then the working part is quenched.

It is made of a small production tool. It is used for micro-processing of metal, wood, leather and other surface layers.

The world's earliest record of a file comes from the literature of the Hena Jian. It is recorded that the bronze file was invented by the Cretan civilization of Libang around 2000 BC, the earliest copper file was invented by the ancient Egyptians in 1300 BC, and the iron file was invented around 700 BC. In the West, it is recorded that the ancient Romans made files using carburizing heat treatment technology around 1100 AD, but it is believed that ancient China was around 200 BC during the Qin and Han dynasties.

Carburizing technology has been widely used in the processing of files.

Types and functions of the file:

Cutters are classified into coarse, fine, and very fine (smooth files) according to the size of the file.

The size of the file is determined by the number per 10 mm width. The more key wires, the smaller the file. The key pattern is divided into single pattern and double pattern.

The single-grain file teeth are straight, and the file edge is 70 80. They are used to file soft metals or smooth surfaces. The file pattern of the double-grain file is staggered, the key pattern engraved first is called shading, and the file pattern engraved later is called face pattern.

Shading with file edge 45 52, face pattern with file edge 65 or 72. The spacing of the bottom texture is greater than the spacing of the surface texture.

According to the cross-sectional shape of the file.

There are common files (such as flat files, sharp flat files, square files, semicircular files, triangular files, etc.). ) and special files (such as knife edge files, diamond files, flat triangle files, oval files, round belly files, etc.). ).

There are also files for shaping and trimming.

Each file in each group has a different shape, with 5, 7, 10, 12, and so on.

When repairing sheet metal, sheet metal files are often used. The main body file is used to trim uneven marks left by the operation of sheet metal tools such as hammers, top irons, and spoon irons.

How to select the file.

Selection of file cross-section shape.

The cross-sectional shape of the file should be selected according to the shape of the part to be filed, so that the shape of the two parts is adaptable. When cutting the inner arc surface, choose a semi-circular file or a round file (small diameter workpiece); When cutting the inner corner face, select the triangle key; When cutting an inner right-angled surface, you can choose a flat file or a square chain, etc.

Selection of file thickness.

The thickness of the file should be selected according to the allowance of the workpiece to be machined, the machining accuracy and the material properties.

Select the file size specification.

The key dimensions are based on the ruler of the workpiece to be machined.

inches and machining allowances. When the processing size is large and the allowance is large, the file with a large size should be selected, and conversely, the file with a small size should be selected.

Selection of file wires.

The file wire should be selected according to the nature of the material of the workpiece to be filed.

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The pro-method is the selection of the cross-sectional shape of the file as follows. This should be selected according to the cross-sectional shape of the processed workpiece, so that the cross-sectional shape of the two is suitable. When filing the imaginary surface of the inner arc, it is necessary to choose a semi-circular file or a round file (small diameter workpiece); File the inner corners.

Selection of files. It should be selected according to the machining allowance, machining accuracy, and material properties. Coarse teeth are suitable for workpieces with large machining allowance, low machining accuracy, large surface roughness value and soft material; Otherwise, choose a fine file.

Selection of file size specifications. The wheel is selected according to the size of the workpiece and the machining allowance. In order to prolong the service life of the file, the following principles of use must be observed:

It is forbidden to use a new file to beat hard metal; It is not allowed to use a file to frustrate the quenching material; 3. Forgings or castings with hard skin or sticky sand must be ground off with a grinder before they can be processed with a semi-sharp file; 4. Use one side of the new file first, and then use the other side after it is dulled; 5. When filing, use a wire brush to clean up the debris on the surface; 6. The file should not be overlapped or stacked with other tools; Hope mine can help you <>

Do you have any other questions?

A file is a common hand tool that is primarily used to trim or trim uneven surfaces, and is often used on metal, wood, plastic, and other materials. However, even though a file may seem simple, improper use can lead to a decrease in the quality of the work and even endanger the safety of the workers. Let's learn how to use a file correctly.

Step 1: Choose the right file. Files come in all shapes and sizes, and it's crucial to choose the right one for a particular job. Therefore, according to the shape and material of the workpiece, the corresponding file should be selected.

The second step is to prepare the workpiece. The file is only used to trim the irregular surface, if the object itself has a deep bump or trough, then it needs to be reduced and flattened with a hammer for the file to trim.

Step 3: Keep the file straight. When using a file, it is very important to keep the file straight, once the file is bent, it will cause the file to be uneven, which will affect the results of the file.

Therefore, when using a file, keep it level to ensure that the surface of the object is trimmed evenly.

Step 4: Control the filing force. Use the file as if it were a light touch, distribute the force evenly across the surface of the file, and do not apply excessive force to avoid injury from the file.

Step 5: File the direction. When using a file, you should file off the large pieces of material from large to small, and then gradually refine the details, taking care not to flip the sliding file surface and strike the surface of the file.

Finally, in addition to the above steps, it is also necessary to keep the file clean and maintained. If you have been using the file and the surface of the file becomes frizzy or dull, you can use a file stone to file the back of the file in the direction of the file edge, polish its surface, and restore its sharpness. In addition, it is necessary to pay attention to regularly talking about the grip of the file to coat the file with anti-corrosion oil to avoid the file from being damp and rusting.

These simple steps ensure the long-term operation and effective use of the file.