What kinds of hand saws are there?

1, frame saw. Also known as frame saw, it consists of I-shaped wood frame, twisted rope, twisted blade and saw blade. The two ends of the saw blade are fixed on the frame with knobs, which can be used to adjust the angle of the saw blade. After the rope is tightened, the saw blade is tightened and can be used. Frame saw can be divided into three types according to the length and pitch of saw blade: thick, medium and thin. The saw blade length of the rough saw is 650-750 4-5mm, and the tooth pitch is 4-5mm. The rough saw is mainly used for sawing thick wood. The saw blade length of medium-sized saw is 550-650 3-4 mm, and the tooth pitch is 3-4 mm. Medium-sized saw is mainly used for sawing thin wood or tenoning. The saw blade length of the fine saw is 450—500mm, and the tooth pitch is 2-3mm. Fine saws are mainly used for sawing fine wood and tenoning shoulders.

2, knife saw. Knife saw is mainly composed of saw blade and saw handle, which can be divided into single-sided, double-sided and back-clamped knife saw. One-sided knife saw is 350mm long and has a toothed edge on one side. According to the different functions of the tooth edge, it can be divided into longitudinal cutting and transverse cutting. The double-sided knife saw is 300mm long and has serrated blades on both sides. Generally, one side of the tooth edge on both sides is a vertical cutting saw and the other side is a transverse cutting saw. The saw board of the back-clip knife saw is 250-300 mm long, and the back of the back-clip knife saw is clamped straight with steel bars, with fine serrations, divided into longitudinal cutting and transverse cutting.

3. Slot saw. The slot saw consists of a handle and a saw blade, which is about 200 mm long. Slot saws are mainly used for sawing wood.

4, board saw. Also known as a hand saw. It consists of a handle and a saw blade. The length of saw blade is about 250-750 3-4 mm, and the pitch of teeth is 3-4 mm. Plate saw is mainly used for sawing wide plates.

5, narrow hand saw. The saw blade is narrow and long, with a sharp front end and a length of about 300-400 mm The narrow hand saw is mainly used to saw narrow holes and slots.

6. Bending saw. Also known as circular saw, its structure is the same as that of frame saw, but the saw blade is narrow (about 10mm), which is mainly used for sawing arcs, curves and other parts.

7. Wire saw. Also known as bow saw, it is made of bamboo pieces bent into an arch and steel wires stretched at both ends. Saw flash is cut on the steel wire, and the sharp edge of flash is used for sawing. The steel wire is about 200-600 mm long, and the saw bow is 800-900 mm long. Wire saws are mainly used to saw complex curves and holes.

Extended data:

When using, be sure to pay attention to the safe operation methods of various saws:

1. Before using the frame saw, adjust the angle of the saw blade with the knob. It is customary to twist the guy rope with a hinge at an angle of 45 to the plane of the wooden frame to make the saw blade straight and tight. When sawing the road, the right hand holds the saw handle tightly, and the left hand presses it from the beginning, pushing and pulling it gently. Don't push too hard; Don't twist left and right when sawing, be heavy when sending the saw, be light when lifting the saw, and push-pull rhythm should be even; After sawing, hold the sawed part firmly by hand. After use, loosen the saw blade and hang it in a firm position.

2. When using the cross saw, balance the force of both hands to prevent the saw from running to the side with strong force; When correcting the offset, the deviation should be corrected slowly to prevent the saw blade from being stuck or broken.

3. When using the wire saw, the force should not be too strong and the sawing speed should not be too fast to avoid wire breakage. When sawing, the operator's head is not allowed to be at the upper end of the bow, so as not to hurt his face when the steel wire breaks.

4. Check the sharpness of the saw blade and the firmness of the saw frame and handle at any time; Saw blades with dull teeth and uneven slope should be repaired in time, as well as the damage of ropes, nuts, knobs, handles and wooden frames before they can be used again.

Baidu encyclopedia-woodworking tools

Baidu encyclopedia-chainsaw fright