Presentation on wood processing on the topic “sawing wood.”
Like any other tool, a hacksaw will work well if it is acute. Subject to frequent operation, very soon the question of sharpening the hacksaw on wood arises. Hand hacksaw on wood over time becomes not so sharp, the teeth grind, becoming more round on the side and in front of the edge. Therefore, it becomes more difficult to work with a saw. To restore the previous severity of the teeth, it is worth sharpening them. Keep in mind that before and after sharpening, the teeth should have the initial height and the step of the angles.
It is also worth considering the fact that not every hacksaw can be sharpened. For example, a tool that has small teeth should not be sharpened. In addition, the teeth made of red.hot steel are not dragged. Large hacksaw wood is best sharpened.
Before sharpening, it is worth breaking the teeth. To ensure free movement on the workpiece, as well as in order to avoid clamping the tool, the teeth must be diluted smoothly as they deepen.
The wiring of the teeth should be bent in different directions for a specific distance. After that, the width of the cut will increase, and will have a large width in comparison with the thickness of the cloth canvas. The gaps are obtained on the sides. At the end of the wiring, the hacksaw will be easily moved “back and forth”, and the canvas will not touch the surface of the cut, as a result of which the master will freely remove the tree with each layer.
During the wiring, it is worth taking into account the fact that with an increase in the width of the teeth divorce, the cut will expand. Therefore, you will avoid stabbing jamming. However, this does not mean at all that with excessive wiring of the teeth (increased width), a wide cut will be obtained, on the contrary, the teeth will tear the wood and work will become harder. The optimal width of the teeth is one and a half to two times greater than the thickness of the hacksaw canvas. For this reason, for sawing raw wood, the teeth should be taken to the sides by 0.5. 1 mm, and dry wood. less than 0.5 mm.
Tond the teeth will help a special tool. wiring. This is a small metal or wooden plate having a small gap, the width of which is greater than the thickness of the hacksaw. Often, the wiring is equipped with an adjusting screw, with which you can achieve an even bending step of the teeth.
- Squeeze the saw in a vice so that only some cloves peek out
- fix the vice on a convenient flat surface, for example, on the table
- bend the teeth with a divorce device in the opposite direction
- Do not bend the teeth completely, otherwise they will break
- At the end of the wiring, you need to check that the teeth are at the same distance and do not peek out.
The sharpening of the tool can be called a real art, for this reason it is worth observing certain rules:
- Reliably fix the hacksaw. The canvas should be fixed in a vice or other wooden device that is installed in a well.lit place and on a stable surface. On the knees, stools or on a brick high.quality sharpening will not work
- Use high.quality tools. Do not save when buying cheap tools. You should definitely purchase a quality file
- For prolonged hacksaw service, it must be cleaned with a metal brush and rubbed with wood coal. This is necessary so that the hacksaw does not get clogged and does not stop
- The knife handle must be held in the right hand, and the end is supported by the left, directing the file to the teeth. It is necessary to press on the teeth smoothly, directing the file in one direction. When you return the file, try not to touch the teeth
- you need to try to remove the metal from the edge of the teeth evenly. For convenience, you can calculate the number of movements, for each teeth it should be the same
- A file that has a velvet notch will help to get rid of burrs from the teeth. From the side faces of the hacksaw, the notch should be removed with a donkey.
At the end of sharpening, it is necessary to check the quality of sharpening and the severity of the teeth. Well.sharpened edge does not shine.
General sharpening requirements
There is not a special machine for sharpening hacksaws not in every garage or workshop, but this will not hurt to correct the tool with your own hands.
There are, of course, exceptions. hardened teeth cannot be sharpened.
Diamond drill and other tricks will not help.
Such a saw has an increased resource and is not subject to repair, but a replacement for a new.
It is easy to determine the hot steel. it has a black color with a blue tint.
As a sharpener for a hacksaw, a grinder or file and a file are usually used.
A prerequisite is to preliminarily carry out the correct wiring of the teeth, because the thickness of the hacksaw canvas affects the width of the cut, so the edges should be bent to the required width.
How to sharpen a hand saw
After divorce, the saw must be sharpened
This procedure does not require special equipment, here you can do with an ordinary triangular file. Sharpening technique with this tool is as follows. The file is taken with one hand by the handle, the other by the tip of the tool and move from themselves, pressing on the teeth smoothly and evenly, then in the opposite direction, without touching the teeth. The teeth of a hand saw must be focused on both sides, from the top to the base.
After sharpening on the faces of the teeth, burrs can form, which will negatively affect the work of the tool, dyeing and blunt teeth. They must be removed with a file with a fine notch.
During operation, the saw is blunting, so sometimes the teeth are undermined by an emery bar. Constant sharpening levels the wiring so that the saw is preserved in working condition, the dentitions must be periodically repeated. However, conducting capital wiring and sharpening of teeth is not required too often.
How to saw a two.handed saw detailed instruction with a description
At first glance, the process of sawing with a two.handed saw may seem easy and uncomplicated. However, it is only worth the beginner to take up the hacksaw, it immediately becomes clear that this is work for real and strong hands. However, it is not necessary to have a mountain of muscles to properly saw the wood with a saw “Friendship-2”. This needs a little experience, and also understand the principle of work.
Sharpening a Crosscut Handsaw | Paul Sellers
It is interesting!Even with the experience of work with short.made hacksaws, a beginner who picked up a two.handed saw for the first time, will be unpleasantly surprised. If an experienced saw at the other end of the saw will stand, then the beginner will have a hard time until he masters the principle of operation of the device. Instructions on how to cut a logs and trees as follows:
- First you need to fix the log by installing it on the “goats”. It should be borne in mind that it is most convenient to carry out the work standing on the legs, so even if the log lies on the ground, then for the correctness of its cut, it should be placed on a special stand. goats. goats
- A section of the log that is sawn off the main part should hang above the ground
- Both sawmills take a convenient position, putting their feet shoulder width apart. Here the main thing is reliable emphasis, otherwise the likelihood of an injury is not excluded
- Ideally, it is recommended that one of the sawmills be a little higher than the other, for example, substituting the tray. This will accelerate the cut, but is not at all a mandatory action
- Having taken up the handles of the tool, you can proceed. The main thing when working with a two.handed hacksaw is synchronous work with hands. The effectiveness of achieving the final result depends on the smoothed work by hands
- The principle of steam sawing is as follows. you need to make an effort in only one direction. pull the canvas on yourself. You do not need to push the tool from yourself, since this task is assigned to the partner. At a time when the partner pulls the canvas on himself, the hand of the first saw rests
- In this way, not only the efficiency of work increases, but also rapid fatigue is excluded
The speed of achieving the result is affected by many factors, like the thickness of the log, the length of the canvas, the quality of sharpening of the teeth, as well as the synchronous work of the sawmills. It is worth noting the following, with the right approach to sawing, it is possible to achieve a quick sawing comparable to the work of the chainsaw.
It is interesting!If the canvas has signs of corrosion deposits, then before the work it is recommended to clean the surface with fine sandpaper (to accelerate the work you can use a hand brush for metal), and then apply machine oil to reduce resistance when working with a tool.
To quickly and efficiently sharpen a hacksaw on wood, you should prepare a set of equipment for wiring teeth and sharpening. Would need:
- locksmith vice;
- grinding bar;
- Measuring instrument: transporter and caliper;
- equipment that allows you to fix the canvas at angles 90 ° and 45 °.
Sharpening the hacksaw with a file
A notch is needed a whole and not clogged with metal dust. If you sharply sharpen a hacksaw in time and properly, it will be easy and convenient to work with it. Such an instrument will last much longer, delighting its owner with an even and accurate reza and high quality of the surface of the cut of wood.
Wrestling of teeth
So that the tooth does not break when wiring, do not bend it entirely.
Before sharpening the cutting element, it is necessary to check and correct the wiring of the teeth. The quality of the wiring is checked visually and by measuring the width width.
Breeding tooths of hacksaw is carried out using a special tool. wiring. Elementary wiring is a small metal plate with a handle. A slot is made in the plate, a slightly larger thickness of the canvas of the hacksaw. To improve the quality of breeding, it is necessary to use wiring with an emphasis that, with the help of a barashka and screw nut, is set at the right distance and, thus, controls the size of the bend.
The dentition itself is carried out in the following sequence. The saw is clamped in a vice so that only the teeth are above the vice of the vice. They are alternately captured in the slot of the wiring and bend in the middle part to the given angle in the right direction. When using the wiring with emphasis, first, the teeth are bend in one direction. Then the emphasis is rearranged, and another group bends in the opposite direction. Tooth bend is carried out by smooth movement.
The quality of the teeth is checked visually and using the measurement by a caliper. To test the lack of excessive bending of individual elements, a simple test is recommended. The saw after the wiring stretches between the vigs spread out to the width equal to the width width. Excessive tooth bend will not allow the canvas to move.
The efficiency of using a hacksaw on wood largely depends on its technical characteristics. The main ones are:
Read how to saw a ceiling skirting board with a stupid
When choosing a tool, you need to pay attention to each element of the characteristic. Only in this case you will not have to regret the purchase.
Type of the handle
Type of the handle and the material from which it is made largely determines the convenience of working with a hacksaw on wood. It is best to work with a saw equipped with a whole plastic handle with rubberized fingers. The handle made of two parts is less convenient, since it does not have sufficient rigidity.
There are also hacksaws with braid handles. They, as a rule, equip universal and ray saws, in which canvases can be changed during work.
Technical characteristics of the hacksaw on wood
Information what the hacksaw consists of is already higher. The characteristics of the working area depend on a number of parameters:
The saw should be made of steel, the brand of which is indicated in GOST 5950-73. When cutting a tree (logs) of a large diameter, it is more convenient to work with a long saw (45-50 cm), since a large number of elements pass through one movement through one movement through the material. A hacksaw up to 35 cm is used for small work, suitable for solving household problems.
Standard width of the blade-10-20 cm. In some cases, a narrow saw is recommended, but the canvas is easily damaged. Therefore, the GOST indicates the requirement to work with the web of the average width.
The characteristics of the teeth affect the parameters of the work, therefore, to increase the speed of the carpenter, it is necessary to pay attention to their appearance. It is more convenient to saw fresh tree with a tool with triangular elements located in 2 parallel rows. Having an average tooth size, she quickly copes with the task, without clogging with sawdust the working area during operation.
You can also get an accurate cut by combining round elements with triangular. The accuracy of the seam depends on the size of the angle between them.
The number of teeth per inch (tpi) also matters. This is a performance parameter for the working area. If you take the same saw length, then with an index 3-6 elements are large, the speed of work is high, but low seam accuracy.
To cut the tree with a saw that has a TPI 6-9 coefficient, you will need more time, but the fishing line for a trimmer of the saw will be more accurate due to small teeth.
How to sharpen a hacksaw on wood correctly
Wiring and template to check the correctness of the saw of saw: a. wiring; b. template: 1. ledge; 2. nut of the installation screw; 3. sawing canvas; 4. plate; 5. spring.
In this case, the divorce of the teeth on each side should be the same. If after wiring individual teeth are bent more than others, they are corrected. they are bent in one fishing line for a trimmer with the rest. If the teeth are different in height, then before sharpening them are aligned with a file (rice. 52, b).
The breeding and sharpening of the teeth of the hacksaw can also be done using a vice, pliers and a trihedral file with a fine notch
First, with the help of a wooden gasket, the canvas is fixed in a vice and with pliers they begin to carefully remove the tops of the teeth in turn in one direction or the other (rice. 53, a), but not more than half the thickness of the canvas. A wider divorce will only damage, as the drink will turn out to be too wide and uneven. It is necessary to ensure that the divorce of all the teeth is the same, otherwise, not all teeth will participate in the process of sawing, but only the most bent and it will be difficult to work with such a saw. Diluted teeth should be within the gasket, so the position of the canvas is changed from time to time.
Sawdowed saws of a trihedral file. The canvas is clamped in a vice and moved as the teeth are dragged. There are two varieties of sharpening. oblique and straight.
If the saw is designed for mixed longitudinal sawing and its teeth have the shape of a rectangular triangle, a simpler straight sharpening is used, when performing which the file is held perpendicular to the canvas (rice (rice. 53, b).
Inserting it alternately into each gap between the teeth, with light pressure, they are drawn along their edges in the direction of themselves. In this case, the edges of the file should fit tightly to the edges. The reverse movement is performed, raising the file so that it does not touch the saw. It’s not worth driving a file for a long time in the same place, just go through each tooth 3 times, and with repeated dragging one will be enough and one.
How to Sharpen a Hand Saw | Ripsaws
Saw discs “show teeth
World practice shows that on saw equipment they rule the tool long before the wear of solid tips. However, at domestic enterprises, saw discs often bring to complete unsuitability.
And the short vision of managers who save on the sharpening and maintenance of a saw tools are guilty of everything. Meanwhile, those who sees rational grain in the restoration of saw discs are becoming more and more.
For processing wooden blanks, changes in length and shape, a saw is often used. This tool is represented by a combination of the working part and handle. At the same time, the working part is represented by a metal plate with cutting elements, which are located in a certain sequence relative to each other. Only with proper and timely maintenance can the likelihood of wear of the product be excluded. An example is the wiring of the teeth, which is performed from time to time to ensure the smooth course of the tool on the resulting cut.
Three distinctive features are characteristic of strip saws. They are made only of special varieties of instrumental steel, which provides high indicators of strength and wear resistance of teeth. Manufacturers usually use steel of 9XF and B2F categories, foreign companies prefer the C75 series. In any case, the hardness of the material should be at least 45 HRS.
The width of the cutting of the canvas of the tape saw is much already already than that of disk analogues. As mentioned above, this is a fundamental factor in the processing of valuable wood and business wood.
Saws can easily cope with blanks of any length and diameter. At the same time, a properly sharpened strip saw provides high production productivity.
It must be clarified that the reliability of closed saws is explained by the heterogeneity of the material that is used to make the canvas.
In particular, the body of a saw instrument is usually made of spring steel, which has incredible resistance to stretching and dynamic loads. Varieties of steel with a high molfram and cobalt go to the manufacture of the cutting edge. Individual parts of the canvas are welded to each other with high.frequency currents. Tools made using this technology can be used to saw metal.
The need for sharpening
The most obvious plus of severity is the speed of sawing. When working in the country, this is even more important than in the workshop, as you often have to work in crowded, standing in an uncomfortable position. Poorly sharpened blade stuck in wood, especially raw. In addition, there is a risk that the canvas will break and injure the working.
The practical advantages of the severity include:
- The accuracy of the cuts performed.
- Longer life of the canvas.
- Saving on the replacement of hacksaws.
- High performance of carpentry.
Definition of the right moment
Without experience, people often hit the extreme to the extreme and either sharpen the saw every few days, or once a year. Determine the need to sharpen the time. the wrong approach.
There are a number of signs that indicate that the teeth are dull:
- The canvas regularly stuck in wood.
- When sawing, the sound changes, it becomes more “dumb”.
- The shade of the teeth is changing.
- The resistance of the material is significantly increased.
- The ends of the teeth are noticeably rounded.
- The blade leaves the cut line.
Signs that the saw was dull
Given the fact that the hacksaw is subjected to constant loads during use, its teeth are dulling over time. The degree of efficiency of work with a dull tool is noticeably less. In addition, you should not use such a hacksaw for the following reasons:
- Reduced performance. When sawing a tree, more the strength of the master and his time is spent;
- The accuracy of the work worsens. With stupid teeth, it is almost impossible to smoothly and neatly cut the wood. It is especially difficult to work with such a saw in the garden;
- The danger of using a hacksaw. During operation, the tool will get stuck, go from the cut line, jam, which increases the likelihood of an injury.
The hacksaw must be urgently sharpened, if there is a characteristic dumb sound, the ends of the teeth were widened, it is not possible to cut the wood. If it became difficult to work as a tool, then it is better to stop sawing, inspecting it and proceeding with the solution of the issue of sharpening.
Purpose and device saw
Hand hacksaw for wood is used to saw out various wood materials. It is a canvas with teeth in the lower part. On the one hand, the tool is equipped with a handle, with which the master holds it during sawing work. The convenience and comfort of working with the saw depends on the quality of the handle.
The number of wood hacksaw manufacturers is quite large, but they all differ not only by names, but also by quality. All of them are intended for sawing wood, wood-bruise, logs, laminate, as well as tree trunks. Casewalks are divided into such species as: classic, outfit, beam, as well as with a school and award. An important role in choosing a tool is played by the thickness of the canvas. After all, a thin canvas during sawing wood may break, and it is quite difficult to work with fat.
Important! Knife habits on wood should be periodically tightened. The hidden saws include such canvases that did not go through the hardening stage. If the links of the canvas are hardened, then it is impossible to sharpen them.