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METHOD FOR CUTTING SHEET MATERIAL
Cutter for straight cutting
Cutting sheet material is possible with different tools, depending on the specific conditions, the configuration of the part, the brand of material, etc. The most convenient are special cutters made from an old hacksaw blade.
Cutter lead on the edge of a tightly pressed ruler, and repeatedly. Later, as if the cutter is going to go down by 0.2-0.3 mm, the ruler can be removed. Having made an incision on a third of the thickness of the sheet, the sheet is cut at the edges by a saw, the overturn is also repeated on the reverse side. Later 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 processed by a flat file.
Cutter for cutting round holes
Cutter is a piece of hacksaw blade, one end of which is bent and sharpened, a handle is attached to the palm end (Figure a). The cutting part operates as follows. The section of the sheet is annealed and also bent at an angle of 90 ° at a distance of 3-4 mm from the margin. The bent edge is sharpened. Handle is a sleeve, put on a screw M3 or M4 also tightened with two nuts. Several holes with a diameter of 3 mm operate on the annealed section of the web. The distance from the centers to the bent end is determined by the radii of the holes that need to be cut. Then the torch is quenched.
The cutting process is as follows. A hole with a diameter of 3.1 mm is drilled in the center of the cut circle. Combine the desired hole on the cutter with an opening on the workpiece and also strengthen the cut. to the screw M3 so that the cutting edge is pressed against the surface of the workpiece to the features of the circle of the future hole. Then the torch is rotated by the handle until it does not cut the groove by half the thickness of the sheet. Later this cutter is rearranged to the other side of the sheet and the process is repeated until the hole is filled with a cut.
Instead of a hacksaw blade, a steel plate of suitable dimensions can be used, only the cutting unit is made from a broken M4 tap. The tap is sharpened (figure b), screwed into the threaded hole at the end of the plate and also fixed with locknuts.
Cutting of organic glass
Organic glass can be cut with ordinary thread # 00. Thread is stretched in the machine for a hacksaw blade or in a jigsaw. Cutting the same as if with a hacksaw. In this way, it is possible to perform figured cutting of organic glass with great accuracy. For figured cutting it is possible to use a piece of nichrome or nickel wire 0.2-0.3 mm in diameter stretched on insulators in a saw blade machine or in a jig saw and also an adjustable autotransformer connected to an electrical network through a step-down transformer. The temperature of the wire must be selected by the old route, changing the voltage applied to it.