Woodworking – Planer – Rotary disk cutter
Patent
1999-08-03
2000-11-21
Bray, W. Donald
Woodworking
Planer
Rotary disk cutter
30477, 1441545, 144219, 144234, 1441141, 144241, 409182, B27C 100
Patent
active
061488801
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention is based on a planer-type face milling machine.
BACKGROUND INFORMATION
In the technical journal HK 6/94 reference is made on page 762 to a multiple disk saw K34G/1200, which is provided with special separating cutters, which simultaneously saw and plane the wood. These separating cutters carry two types of teeth, reaming teeth and planing teeth. The reaming teeth, which are arranged radially on the furthest periphery of the separating cutter, only perform the cutting work using a major cutting edge. For every two reaming teeth there follows a planing tooth, which, using an axial cutting edge, provides a secondary processing to the already reamed surface of the cut, left somewhat rough by the saw. The cut surfaces of the sawed pieces are very smooth in areas, although, depending on the methods, minimal but clearly visible ring-shaped indentations can occur. As a result, it is not possible in every case to do without a secondary processing, such as planing, before the lacquering or waterproofing.
German Patent No. 195 43 992 describes a conventional hand milling machine, using which thin layers of the wood material, in particular old lacquer layers, can be removed. The surface quality that can be attained in this way is relatively coarse, so that it is impossible to lacquer or to waterproof without a subsequent milling process such as polishing or the like. The conventional machine thus represents a face milling machine having conventional cutting geometry, which does not achieve the performance of a planer-type face milling machine.
The conventional stationary planer-type face milling machines result in an inferior surface quality in the planing of the end piece and in the planing teeth emerging from the workpiece, because, in this context, a situation arises in that the edge tears out of the wood relatively coarsely.
SUMMARY OF THE INVENTION
A planer-type face milling machine according to the present invention has the advantage that all the surfaces, including end surfaces and edges, can be machined at a level of quality previously unattainable with any type of planing and cutting machines.
The planer-type face milling machine of the present invention, in addition, has the advantage that it can be utilized as a hand tool machine for the final processing of wood workpieces which are too large and too heavy for processing on stationary machines. In this way, the new planer-type face milling machines can be advantageously used also for the final processing of finished-installed wooden panels and wooden floors, or in the restoration of furniture, shavings being formed predominantly without a dust component, i.e., without generating the fine dust which is difficult to filter and is dangerous to health.
As a result of the fact that the milling head has only a single cutter having only one operative secondary cutting edge and lacking an operative main cutting edge, a surface processing is assured that has final quality, the assembly/adjustment or changing cutters being particularly simple as a result of there being only one single circular path.
As result of the fact that a second cutter can be arranged having only one operative main cutting edge, a coarse-machining preliminary cutting using the second cutter is possible resulting in a shaving thickness of approximately 3 mm, and a subsequent cutting using the first cutter is possible resulting in a shaving thickness of approximately 0.3 mm making removal very effective and surface quality high.
As result of the fact that the secondary cutting edge has a predominantly clothoid-shaped area which is to penetrate in a cutting manner into the workpiece being processed, the area tangentially passing over into a non-clothoid-shaped area which is not to penetrate in a cutting manner into the workpiece, cut surfaces are produced that are particularly clean and smooth.
As result of the fact that the two different cutters on the milling head can be mounted on diametrically opposite sides, a not unbalanced milling is possi
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Dehde Jorg
Ober Maximilian
Scholz Frieder
Bray W. Donald
Robert & Bosch GmbH
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