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METHOD OF CUTTING THE SHEET MATERIAL
Cutting of sheet material is possible with a different tool depending on the specific conditions, configuration of the part, brand of material, etc. The most convenient are special cutters made from an old hacksaw blade.
The cutter are on the outskirts of a tightly pressed line, and repeatedly. Later, as if the cutter deepened by 0.2-0.3 mm, the ruler can be cleaned. Having made an incision to the third of the sheet thickness, hacksaw a sheet along the edges, turn the workpiece over and repeat the operation on the reverse side. After this, putting the sheet on the table so that the cut line coincides with the edge of the table, break the sheet. The fracture is treated with a flat file.
Round hole cutter
The cutter is a piece of the hacksaw blade, one end of which is bent also sharpened, and a handle is attached to the friend's end (Fig. A). The cutting part is as follows. The section of the canvas is also annealed, bent at an angle of 90 ° at a distance of 3-4 mm from the margin. The bent margin is ground. The handle is a sleeve, worn on the screw MZ or M4 also tightened with two nuts. On the annealed area of the web there are several holes with a diameter of 3 mm. Their gap from the centers to the bent end is determined by the radii of the holes that need to be cut. Then the cutter is quenched.
The cutting process is as follows. A hole with a diameter of 3.1 mm is drilled in the center of the circle to be cut. Combine the desired hole on the cutter with a hole on the workpiece and also strengthen the cut. to the screw MZ so that the cutting edge was pressed to the surface of the workpiece on the circumference of the future hole. Then, the cutter is rotated by the handle until it cuts the groove half the thickness of the sheet. After this, the cutter is moved to the other side of the sheet and the process is repeated until the hole is filled.
Instead of a hacksaw blade, a steel plate of suitable dimensions can be used, only the cutting unit can be made from a broken M4 tap. Tap sharpen (Fig. B), screw it into the hole with a thread at the end of the plate and also fix the locknuts.
Cutting organic glass
Plexiglass can be cut with ordinary thread number 00. The thread is tensioned in the machine for the hacksaw blade or in the jigsaw. Cut the same as a hacksaw. This way it is possible to perform figure cutting of organic glass with great precision. For shape cutting, it is possible to use a piece of nichrome or nickel-nickel wire with a diameter of 0.2-0.3 mm, stretched on insulators in a hacksaw blade machine or in a jigsaw and also connected to an electrical network through a step-down transformer and an adjustable autotransformer. The temperature of the wire must be chosen by an experienced route, changing the voltage applied to it.