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Posted on May 18, 202011
Metal band saws are also called band sawing machine in the machine tool industry. This is a powerful sawing machine with a long and sharp blade, which consists of a continuous toothed metal strip stretched between the wheels to cut the target material.
Metal band saw is particularly suitable for metal processing, and bandsaw machine in a broad sense is also used in wood processing, and various other materials in the cutting industry, making it one of the most sold industrial tools.
The advantages of band saws include uniform cutting movement due to uniformly distributed tooth loads, and the ability to cut irregular or curved shapes like a jig saw. The minimum radius of the curve that can be cut is determined by the width of the saw band and the curve. Most band saws have two wheels that rotate on the same plane, one of which is powered. In addition, some can distribute three or four loads, so the distribution uniformity of the machine is improved. Compared with precision circular sawing machines, current metal band sawing machines can also cut at a smooth and accurate speed.
Regarding the blade of the band saw machine, it can have various tooth pitches and size ratios, which makes the band saw machine highly versatile and capable of cutting various materials such as wood, metal and plastic. Today, almost all band saws are driven by at least electric motors. The line shaft version was once common in the market, but it has now been eliminated. The blades of metal band saws are very important for sawing quality. Re-sharpening and related issues are therefore considered to be crucial. If the sharpening of the cutter takes too much time and expense, the sawing process will be impractical.
The idea of a band saw machine dates back to the 19th century. Around 1809, William Newberry obtained a British patent for the idea, but the band saw is still impractical in any kind of applications. At that time, it was almost impossible to produce accurate and durable cutting blades, and the continuous bending of the fragile blades on the hub will cause the welding of materials or joints to fail. After about 40 years, a woman Anne Paulin Crepin designed a welding technique to overcome this obstacle. The power hacksaws with reciprocating blades were once very common in the metalworking industries because of their practical use to meet customer needs. Later, with the development of technology, band saws and cold saws replaced power hacksaws.
Sawing machines are like lathes and milling machines. Because the industry is constantly evolving, machine design needs to be constantly changing and innovative. Today, most band saws are automatically controlled and operated by CNC systems. Common automatic band saws have preset feed speed, return, descent, part feed and part fixing functions. Under such production conditions, it is impractical to assign one on-site machine operator for each band saw machine.
In fact, one operator can efficiently feed and unload several automatic band saws. Some automatic band saw machines rely on digital control to make cutting faster and more precise, and even perform more complex bevel cutting. Combining these advantages and needs, most modern metal band saw machines are equipped with CNC controllers to adapt to today's processing requirements and standards. On the other hand, NC type and manual type band saw machines are still very popular in some small workshops or homes due to their relative practicality and reasonable price.
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