Specialists from Izhevsk State Technical University named after M.T. Kalashnikov have patented a device for accelerated processing of holes in metal parts. The technology allows rough and finish grinding in one pass – without re-clamping the part.
Typically, honing (leveling and grinding the inner surface of a hole) occurs in two stages: first rough processing, then fine. And each time the part needs to be re-clamped or the tool changed. The development by Izhevsk engineers solves this problem.
The device is mounted on a conventional vertical honing machine. A second spindle is added to the main spindle, installed in parallel on a special cantilever plate. The first head performs preliminary processing, the second – final. Rotation is transmitted between them via a belt drive with pulleys of different diameters.
The expansion units of the abrasive bars of both heads are connected by a special broken-shaped rod, which synchronizes their operation. The second head is equipped with a compression spring for precise surface finishing.
As a result, the hole processing time is reduced, productivity is increased, and quality remains high. The development can be applied in mechanical engineering, aircraft construction, and other industries where precise processing of internal surfaces of parts is required.
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