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Two cuts on each flitch trim the bark from the sides, and reduces it to a standard board width with squared edges. Two more cuts at each end set the length. Lumber can be quickly flat-cut with a side-by-side set of mechanical saws. [3] A slower but sturdier method involves passing the log back and forth over a single saw.
Diagonal- and stepped-cut rift-sawing is intermediate to flat-sawn and radial cut lumber. The angle of the bastard grain may differ along the width of the board or between opposing sides, and enhances the appearance of ray fleck. Flat-sawing is the quickest method, producing the least wood waste and largest possible boards from a log.
Quarter sawing or quartersawing is a woodworking process that produces quarter-sawn or quarter-cut boards in the rip cutting of logs into lumber. The resulting lumber can also be called radially-sawn or simply quartered .
Edge banding machine Strips with hot-melt adhesive. Edge banding or edgebanding is the name of both a process, and an associated narrow strip of material. It is used to create durable and aesthetically pleasing trim edges during finish carpentry. The method is used to cover the exposed sides of materials such as plywood, particle board, or MDF ...
Normally, the desired outcome of jointing is an edge which is straight along its length and perpendicular to the face of the board. However, there is another technique often used when gluing up panels, referred to as a sprung joint. [1] In this technique, the desired outcome is an edge which is slightly concave along its length.
The built up edge effectively changes tool geometry and rake steepness. It also reduces the contact area between the chip and the cutting tool, [1] leading to: A reduction in the power demand of the cutting operation. [1] Slight increase in tool life, since the cutting is partly being done by the built up edge rather than the tool itself. [4]
Such back-cutting operations can obviate second operations, [2] with their attendant setup time and part rehandling time. Sometimes the limiting factor in applying this advantage is the difficulty of chip clearance; the operator needs to intervene because chip nests prevent the tool from passing freely and opening and closing freely. [ 2 ]
Die roll takes the form of a radius around the outside edge of the blank and the pierced holes. After compression, the part shears for about 10% of the part thickness, and then fractures free of the strip or sheet. This fracturing produces a raised, jagged edge which is called a "burr". Burrs are typically removed by tumbling in a secondary ...