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Posted on Aug 23, 20192
In the field of machine tools, band saw is often used in metal processing and wood processing, but can also be used to cut a variety of other materials. The main advantages of the band saw machine include the uniform cutting movement due to the uniformly distributed tooth load, and the ability to cut irregular or curved shapes like a jig saw.
The curve scale of the band saw is critical to the sawing performance. The minimum radius of the curve is determined by the width of the saw band and the curve. Most band saw machines are designed with two wheels rotating on the same plane, one of which is powered. In addition, some may distribute three or four loads. When the operator selects the sawing tool according to the type of work piece, the curve scales should be considered.
In addition to the curve scale, there are other factors that affect the sawing result. One of them is the bandsaw blades. The bandsaw blades have various tooth pitches and size ratios, making the band saw machine more versatile and capable of cutting wood, metal and plastic. Today, almost all band saws are driven by electric motors, although line shaft saws were once common on the market.
Industrial inventions usually come with market demand. The history of band saw can be traced back to the 19th century. Around the 1800s, William Newberry obtained a British patent for this idea. However, the band saw was still not practical, because no one was able to produce precise and durable bandsaw blades at that time. Continuous bending of the blades that were not tough enough on the wheels would cause material damage. After about 40 years, Anne Paulin Crepin discovered a welding technique that could be used to produce usable bandsaw blades. The French inventor applied for a patent in 1846. She sold the patent to A. Perin & Company, a Paris manufacturer.
In the United States, in 1836, Benjamin Barker in Ellsworth, Maine, was awarded the first patent for a band saw in the United States. Paul Prybil's design led to the production of the first practical band saw and it is launched on the market.
Before the popularization of band sawing methods, electric hacksaws with reciprocating blades were the main means in industrial applications and were widely used because of their practicality in metalworking. The price of electric hacksaw is affordable, and can properly meet customer needs. With the development of technology, band saws and cold saws gradually replaced electric hacksaws.
In recent years, most band saw machines are automatically controlled by computer numerical control (CNC) systems. The common automatic band saw machine has preset feed speed, return, descent, part feeding and part fixing functions. These functions help to improve production conditions. Under such production conditions, it is impractical to assign a machine operator to each band saw machine. Today, one-to-one machine management methods are too expensive and have low productivity.
In fact, one operator can control many automatic band saws. Automatic band saw machines rely on digital control to make cutting efficiency higher, and even perform more complex cutting tasks. Because of these advantages, most modern metal band saws are equipped with CNC controllers to adapt to today's processing requirements and standards.
Sawing operations now tend to be controlled more intelligently. With various intelligent control systems, band sawing operations are now becoming more and more practical.
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