Homemade Circular Saw Sharpening Machine: specifications and diagrams

The use of disk elements has found wide application in many areas of industry, so the machine for grinding circular saws has become very popular. The main requirement for this tool is the high quality of cutting materials. Sharpening is not such a simple occupation as it might seem at first glance. In this case, you can not do without special equipment. The following indicators affect how difficult the operation will be:

- What material is made of the element;

- the diameter of the saw;

- Inclination angle and shape of the tooth.

Machine

The machine for grinding circular saws is not just one device. So you can call a large group of equipment and tools for special purposes. By the method of production, they are divided into two groups:

- Automatic. The process of sharpening is fully mechanized and there is no need for human participation. Such devices are used for production purposes.

- Manual. This can be any device and tools for sharpening by hand. The performance of such equipment is much lower than automatic machines. This form has found application in handicraft workshops for domestic needs.

Equipment of this kind in a wide range of products is on sale, devices can differ in functions, power and price. The hand grinding machine for circular saws, whose price will be much lower (about 20 thousand rubles), can be manufactured independently. The equipment consists of dense and hard-alloy plates that serve as incisors.

Plates for them are made of alloys of different composition. They have a different configuration of teeth. The strength depends on which alloy is used. The granularity of the alloy plays an important role. It should be smaller to give strength and hardness to the product. Typically, such solid alloys are obtained from tungsten carbide cemented with cobalt. Therefore, it is so important that the equipment is precisely a machine for sharpening carbide circular saws.

Differences in the teeth of the plates

The tooth of hard alloys has the basic four planes for work: front, back and side (auxiliary). When the planes intersect each other, the cutting edges are formed: the main edges and a pair of auxiliary edges.

The shape of the teeth is as follows:

- Straight. The use of such a form will be justified when a longitudinal sawing is required fast and not mandatory in quality.

- Slanting or sloping. The angle of inclination of the rear form can be right or left, they alternate with each other. This configuration is most common. Different in size sharpening serve to work with different materials in any direction. Changing the size of the bevel angle in the direction of increase, it is possible to strengthen the cutting and reduce the probability of chipping, but this will lead to a decrease in the strength and durability of the tooth itself. It is possible to tilt the front part of the plane of the element.

- Trapezoid. This tooth is blunted more slowly than the chamfered edge. Alternate it with a straight line. At the same time, the rough cut was a longer trapezoidal, and a clean cut - a short straight.

- Conical. This form of teeth performs a rough cutting of the lower edge of the boards, while the upper one is protected from chips. Basically, the front face of such an element is flat. But if you make it concave, then it is possible to use this apparatus for crosscutting in the final version.

Angle of sharpening

The main angles are those defined by the shape of the teeth. This is the front and rear, as well as the bevel along the front and rear planes.

For the longitudinal cutting of the front corner it is recommended to set the degree in the range from 15 to 25. For the transverse - 5-10 degrees. For universal saws of both sections, it is more correct to choose an average value equal to 15 degrees.

The size of the angle is also determined by the hardness of the cut material. At a high hardness, it is made less. The angle of cutting the front is possible in a negative performance. This finds application in non-ferrous metals and plastics.

Price list

Buy a machine for sharpening carbide circular saws at a cost of 15 000 rubles. You can shell out for more expensive devices. For example, the PP-480Z will cost its owner 280 000 rubles. Prices vary and depend on the purpose of the device, its functions, power and performance. For a small workshop or home use, you can buy a machine for sharpening the circular saws JMY8-70. Its cost is within 18 000 rubles.

Rules of sharpening

The main wear of the saw teeth occurs on the upper edge, which directly participates in the cutting. Its rounding can be 0.3 mm. The central face changes before the others.

- Do not allow the wear of the saw to be significant. The edge can be rounded no higher than 0.2 mm. To sharpen a saw blunted more than this value is harder. This will take more time than for a tool with normal wear and tear. The degree of wear is determined either by the type of sawing, or by the teeth.

- We should not forget about how many sharpening products are produced as much as possible. This value is located within 30-35 times. To achieve this result, both surfaces are simultaneously treated. The machine for grinding circular saws allows you to work only in one plane. And then it will be reduced by about 2 times.

- Before starting work, clean the working disk from dirt and measure the inclination angles. Preparation for sharpening is done from the front of the tooth. The metal layer that can be removed is 0.20 mm.

- If abrasive diamond wheels are used for grinding , they must be cooled with a special liquid (coolant). For better quality and reduced specific gravity, it is better to choose a circle of high grain size.

- One should not allow jags and unevenness, even if it is a self-made machine for sharpening circular saws. They can lead to untimely exit from work and crumbling of metal.

Craftwork

Self-sufficient large work will not be done. Especially if there is a need for equipment. And if not, you can make it yourself. To produce a machine for sharpening circular saws, the price of which will only please, it is possible from simple details. To do this, you need the following basic elements:

- engine;

- Caliper;

- Tilt mechanism;

- stop screws.

The circle is fixed on the engine, the disk blade is on the support, the screws will ensure the movement of the workpiece along the axis of the circle, which will ensure the required angle.

The main task for such an element as a grinding machine for circular saws is to fix them in the required position relative to the circle. This is necessary for the exact observance of the corners, this can be provided by a stand that is fastened to the machine frame in the same plane as the circle.

When the disc is placed on the stand, the teeth must be perpendicular to the plane of the saw. The stand does not have to be made stationary, if necessary, you can make it floating, for this, on the one hand, tighten the hinge, and the second part hook to the frame with rigid bolts. On a design of this type, you can easily rotate the disk of the device to the desired angle and work in a given plane.

Difficulty in work

Using grinding machine for sharpening circular saws, you can face the difficulty associated with the formation of incorrect angles. To eliminate such a defect, it is necessary to fix the center of the saw in the required position relative to the circle. Solve this problem can groove, made on a stand. It will help to straighten the saw. There is an easier solution - to make stops in the working surface that can fix the device in the correct position.

Exploitation

Before the start of the independent manufacture of this unit, you need to think over the drawings of the machine for sharpening the circular saws. They can be calculated on their own, but you can turn to a professional. In any case, to understand all the subtleties of the future device, without a preliminary paper version is indispensable. If you have the necessary knowledge, you can cope without referring to the master. After the embodiment of the future machine on paper, it becomes clear what tools and materials will be needed in the process, what is already there, and what needs to be purchased.

The machine for grinding circular saws, created by itself, has a great advantage in relation to the price before the factory unit. Also, he does not require special skills to work.

Sharpening without machine

You can sharpen the saw at home without the help of a machine. But do not hold it by hand while grinding the grinding wheel. For proper operation, the efforts of the hands will not be enough, and the eye can not adjust the angle. To simplify the task, you can use any locking device, for this purpose, a conventional flat supply is useful. The axis of the grinding wheel must coincide with the surface of the stand. A circle, in turn, should be placed perpendicular to the saw. If necessary, make the corners of the construction render mobile with the help of hinges. But here there is a difficulty in observing the same value of the angle of the front and back sharpening. Avoid this will help a rigid fixation of the saw circle with respect to the abrasive disc. This can be done with the help of a groove or fixing the stops in the stand, which will allow you to fix the angle.

Conclusion

Like any tool, a circular saw requires proper operation and maintenance. Compliance with the technology will increase the service life of the product.

So, we found out how to make a machine for sharpening carbide circular saws. To do this, you will need very few materials, as well as some skills and the desire to make a useful thing with your own hand.