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- Apr 23, 2018 -
In the 1830s, in order to adapt to clocks, bicycles, sewing machine guns and other parts hardened and processed, the United Kingdom and Germany respectively developed the use of natural abrasive wheel grinders. These grinders were made from machine tools such as lathes and planers, and they were retrofitted with grinding heads. They were simple in structure, low in rigidity, and prone to vibration during grinding. They required the operator to have a high degree of skill in order to polish precision parts.
Grinding machines use grinding tools to grind workpiece surfaces.
Most grinders use high-speed rotary grinding wheels for grinding, and a few use abrasive wheels, abrasive belts, and other abrasives to remove abrasives, such as honing machines, superfinishing machines, belt grinders, and grinder polishers.
Grinding machines can process higher hardness materials such as hardened steels, hard alloys, etc.; also can process brittle materials such as glass, granite grinding machines can be used for high-precision surface roughness grinding, high efficiency grinding , Such as strong grinding and so on.
At the Paris Exposition in 1876, the American company Brown-Sharp manufactured a universal cylindrical grinding machine. For the first time, it has the basic features of a modern grinding machine. It has a headstock and a tailstock mounted on a reciprocating table. The box-shaped bed increases the stiffness of the machine and carries Internal grinding accessories. In 1883, this company made a grinding head mounted column and the workbench made a reciprocating surface grinder.
Around 1900, man-made abrasives developed hydraulic transmission applications, which greatly promoted the development of grinding machines. With the development of modern industrial special automobile industry, various types of grinding machines have come out one after another. For example, at the beginning of the 20th century, it developed cylindrical internal cylindrical grinding machines, crankshaft grinding machines, camshaft grinding machines and electromagnetic sucker piston ring grinders.
The automatic measuring device was applied to the grinding machine in 1908. Around 1920, centerless grinders, double-end grinders, roll grinders, guide rail grinders, and honing machine super-finishing machine tools were used in succession; in the 1950s, high-precision cylindrical grinders were available for mirror grinding; The grinding wheel line speed reached 60~80 m/s, the high cutting depth of the high-speed grinding machine, and the slow-feed grinding surface grinding machine. In the 70s, the grinding machine was widely used by the microprocessor, digital control and adaptive control technology.
With the increase in precision, the increase in the number of high-hardness mechanical parts, and the development of precision forging precision castings, the performance of the grinding machines and the output of the varieties have continuously increased.