lapping - definizione. Che cos'è lapping
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Cosa (chi) è lapping - definizione

MACHINING PROCESS IN WHICH TWO SURFACES ARE RUBBED TOGETHER WITH AN ABRASIVE BETWEEN THEM
Lapped; Helium light band; Lap (tool); Lapping machine
  • Lapping machine.

Lapping         
·p.pr. & ·vb.n. of Lap.
II. Lapping ·noun A kind of machine blanket or wrapping material used by calico printers.
lapping         
see lap
Lapping         
Lapping is a machining process in which two surfaces are rubbed together with an abrasive between them, by hand movement or using a machine.

Wikipedia

Lapping

Lapping is a machining process in which two surfaces are rubbed together with an abrasive between them, by hand movement or using a machine.

Lapping often follows other subtractive processes with more aggressive material removal as a first step, such as milling and/or grinding.

Lapping can take two forms. The first type of lapping (traditionally often called grinding), involves rubbing a brittle material such as glass against a surface such as iron or glass itself (also known as the "lap" or grinding tool) with an abrasive such as aluminum oxide, jeweller's rouge, optician's rouge, emery, silicon carbide, diamond, etc., between them. This produces microscopic conchoidal fractures as the abrasive rolls about between the two surfaces and removes material from both.

The other form of lapping involves a softer material such as pitch or a ceramic for the lap, which is "charged" with the abrasive. The lap is then used to cut a harder material—the workpiece. The abrasive embeds within the softer material, which holds it and permits it to score across and cut the harder material. Taken to a finer limit, this will produce a polished surface such as with a polishing cloth on an automobile, or a polishing cloth or polishing pitch upon glass or steel.

Taken to the ultimate limit, with the aid of accurate interferometry and specialized polishing machines or skilled hand polishing, lensmakers can produce surfaces that are flat to better than 30 nanometers. This is one twentieth of the wavelength of light from the commonly used 632.8 nm helium neon laser light source. Surfaces this flat can be molecularly bonded (optically contacted) by bringing them together under the right conditions. (This is not the same as the wringing effect of Johansson blocks, although it is similar).

Esempi dal corpus di testo per lapping
1. "It‘s lapping over the spillway now," Adkins said.
2. Gulf waters began washing onto the shore lapping at the expensive waterfront houses.
3. But as Blair was lapping up the grateful plaudits from the U.S.
4. Army Corps of Engineers spokesman. It‘s lapping over the spillway now,‘‘ Adkins said.
5. One guest said: "He was lapping up the attention and he was quite drunk.