Lapping Machine

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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Lapping Machine

 

a metal cutting machine tool for fine finishing (grinding and lapping) of flat and cylindrical surfaces using laps with surfaces coated with polishing or grinding materials. Vertical lapping machines are used for finishing external surfaces, and horizontal lapping machines for both external and internal surfaces. A vertical lapping machine has one or two metal lapping disks. The workpiece to be finished is placed between these disks in an eccentrically placed retainer (work-holder). The laps rotate at varying rates either in one direction or in opposite directions as the retainer undergoes an oscillating motion in the horizontal plane. As a result of the complex motion of the surfaces being finished with respect to the laps, uniform finishing and high precision of shape (tolerances to within 1–3 microns) are obtained. Surface roughness up to class 14 can be obtained using lapping machines.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Small parts can be challenging to produce on big lapping machines, for example, it can be difficult to control parts that stick to the upper plate when unloading the machine at the end of the cycle.
To reach this goal and meet customer demand for short delivery times, expert service and high quality equipment, the production and service facilities have been equipped with state-of-the-art machinery, such as CNC units, lathes, grinders, lapping machines, sandblasting units and test rigs for compliance with API 682.
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Allison in the 1950s and '60s, developed and manufactured about 200 Allison Doctor Blade Honing and Lapping Machines. These machines allowed press operators to put effective and consistent working edges on strips of Swedish doctor blade steel without relying on hand tools or other crude, slow, dangerous, and damaging devices available at the time.
They are designed for use with all types of grinders, honing and lapping machines, milling and drilling machines, and oil reclaiming machines.
Demonstrations of the specialized art of abrasives, sawing, and finishing will include cylindrical grinders; internal grinders; angular wheelside grinders; creep feed grinders; thrufeed grinders; centerless grinders; surface grinders; abrasive belt grinders; jig grinders; CNC tool and cutter grinders; universal grinders; cam grinders; bench, crankshaft, and abrasive cutoff machines; band saws; circular saws; lapping machines; balancing machines; honing machines; and polishing machines.
For large volume wafer production, mestly high powered special purpose doublesided lapping machines with planetary drive systems are use.
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They are designed for use with all types of grinder, honing and lapping machines, milling and drilling machines, and oil reclaiming machines.
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