- Apr 28, 2018 -
In the 1830s, in order to adapt to the processing of hardened parts such as clocks, bicycles, sewing machines and firearms, the United Kingdom
Germany, the United States and the United States have developed grinding machines using natural abrasive grinding wheels. These grinders were retrofitted with grinding heads on existing machine tools such as lathes and planers. They were simple in structure, low in rigidity, and prone to vibration during grinding. They required operators to have high skills in order to sharpen the precision. The artifacts.
The Universal Cylindrical Grinding Machine manufactured by the American Brown Sharp Corporation, which was exhibited at the Paris Expo in 1876, is the first machine with the basic features of modern grinding machines. Its workpiece headstock and tailstock are mounted on a reciprocating table. The box-shaped bed improves the stiffness of the machine and has an internal grinding attachment. In 1883, the company made a surface grinding machine with a grinding head mounted on a column and a reciprocating table.
Before and after 1900, the development of artificial abrasives and the application of hydraulic transmission had great influence on the development of grinding machines. With the development of modern industry, especially the automobile industry, various types of grinding machines have come out one after another. For example, at the beginning of the 20th century, planetary internal cylindrical grinding machines, crankshaft grinding machines, camshaft grinding machines and piston ring grinders with electromagnetic chucks were developed.
The automatic measuring device was applied to the grinding machine in 1908. Around 1920, centerless grinders, double-end grinders, roll grinders, guide rail grinders, honing machines and super-finishing machine tools were used in succession; in the 1950s, high-precision cylindrical grinding machines for mirror grinding appeared; At the end there were high-speed grinding machines with grinding wheel line speeds of 60-80 m/s and large-depth, slow-feed grinding surface grinders; in the 1970s, digital control and adaptive control using microprocessors were widely used on grinding machines. Applications.