Planer

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planer

[′plān·ər]
(mechanical engineering)
A machine for the shaping of long, flat, or flat contoured surfaces by reciprocating the workpiece under a stationary single-point tool or tools.
(mining engineering)
A fixed-blade device for continuous longwall mining of narrow seams of friable coal; the machine is operated along the coal face, planing a narrow cut from the solid coal as it travels.

Planer

 

a metalcutting machine tool whose cutting tool is used to plane flat horizontal, vertical, and inclined surfaces of rectilinear generatrices. There are two basic types of planers: standard planers and shapers.

The principal motion of planers is reciprocal in a straight line. In shapers, the cutter is attached to a head and is reciprocated; in standard planers, the workpiece is mounted on the table, and the table reciprocates. Cutting is effected during the planing stroke, which is followed by a faster, return stroke, during which the cutter or workpiece returns to its original position. The stroke speeds remain constant in all standard planers and in shapers with hydraulic drive; they vary from zero to maximum speed and back to zero in shapers with mechanical drive. The feed motion is in a direction transverse to the direction of the strokes and is accomplished at the end of each return stroke. In shapers, the feed motion is imparted to the table with the attached workpiece; in standard planers, it is imparted to the cutter attached to the head.

Small and medium-size workpieces are worked on shapers. Standard planers are used to plane relatively large workpieces, several medium-size workpieces simultaneously, and workpieces with long, narrow surfaces, primarily in single-item and small-lot production. The use of planers in large-lot and mass production is not feasible because of the nature of the return stroke. In such manufacturing, planers are replaced with milling, broaching, and grinding machines.

REFERENCES

See references under METALCUTTING MACHINE TOOL.

D. L. IUDIN

References in periodicals archive ?
* Planers won't take the warp out of a board, only make the board thinner.
2 planer. You can use a smaller or larger planer depending on the depth.
Briquetting--Pellitizing & Compressed Wood Log Machines, Dovetail Machines, Fingerjoint Machines & Systems, Jointers, Mortising Machines, Moulders/Planers, Planers & Surfacers, Profiling Machines, Ripsaws, Routers --Pin, Sanding Machines, Saws--Cutoff, Shapers, Tenoners/Combo--Single End & Double End
Conveyors; Custom Designed Machinery; End Matchers; Feeders/Tables and Unloaders; Floor Manufacturing Equipment; Flooring; Grooving Machines; Lumber Sorters; Lumber Yield and Inspection Systems; Material Handling Equipment; Moulders/Planers; Optimization Machines and Systems; Planers and Surfacers; Ripsaws; Roughmill Systems; Saws, Gang Rip; Services, Engineering; Services, Plant Layout; Services, Repair Machinery Parts and Service
This is described in detail in the book, "Planers, Matchers and Moulders in America, 1800 to 1985."
"Because of the new developments and technology used in today's planers, woodworking operations are able to increase their yields from eight to ten percent in their planing operations alone," said John Foster, sales manager with Newman Machinery.
Planers can be deployed a few different ways, while trolling at ballyhoo speed.
Weinig's Highspeed Series of planers feature feed speeds up to 800 m/min and feature a robust construction.
Planer boards had to be so far from the boat we needed larger models to see them clearly.
The MC 33 Coated Planer Knives are designed to provide extended service life and optimized productivity; Leitz says the MC 33 coating protects the cutting edge from erosion and corrosion while providing a slick surface that resists buildup of resin.
2 August 2010 - Swedish industrial technology group Atlas Copco AB (STO: ATCO A) said today its unit Dynapac Holding GmbH will consolidate its road construction equipment output by closing a German factory for planers and small pavers and by expanding two units in Germany and Sweden.
International Resource News-2 August 2010-Dynapac Holding approves plan to consolidate production of planers and small pavers(C)2010 ENPublishing - http://www.enpublishing.co.uk