Cutting – With tool sharpener or smoother – Spatially fixed tool
Patent
1996-06-19
2000-02-01
Rachuba, M.
Cutting
With tool sharpener or smoother
Spatially fixed tool
83941, 451195, 451196, 451293, B26D 712
Patent
active
06019023&
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to a cutting machine for cutting a flexible material by means of a rotary cutting wheel, the material being in particular in the form of a single ply or of a small lay-up of plies. It also relates to a method of adjusting such a cutting machine.
BACKGROUND OF THE INVENTION
Cutting machines provided with rotary cutting wheels are commonly used for cutting flexible materials in the form of a single ply or of a small lay-up of plies. Such machines are described in particular in patents FR 2,582,564, FR 2,582,247, and U.S. Pat. No. 3,776,072, and each such machine includes a table-top provided with a support surface for supporting the flexible material, and a cutting head provided with a cutting wheel, with a drive motor for rotating said cutting wheel, and with means for sequentially sharpening said cutting wheel. Furthermore, horizontal drive means are adapted so as to displace the cutting head horizontally above the table-top along two orthogonal displacement axes, and rotary drive means are adapted so as to rotate said head around a vertical tangential servo-control axis.
Moreover, such cutting machines are provided with means for holding the flexible material on the support table-top in a fixed position during the entire cutting process. Such holding means conventionally comprise a support surface constituted by a bristle bed provided with a large number of vertical air-flow passages, and suction means adapted so as to create suction that holds the flexible material against the support surface.
Although such means are entirely satisfactory with respect to holding the flexible material while it is being cut, they suffer from two major drawbacks. Firstly, it is necessary to provide each cutting machine with a specific support surface, and in particular with suction means, which both increase the cost of such machines, and also have non-negligible operating costs with respect to energy consumption. Secondly, holding the material by suction makes it necessary to interpose both a perforated sheet between the support surface and the flexible material so that flexible material is not sucked in, and also another sheet on top of the flexible material so as to provide air-tightness. These sheets, which are unavoidably cut up at the same time as the flexible material, must be replaced after each cutting operation, and they therefore constitute consumables whose cost is non-negligible.
SUMMARY OF THE INVENTION
An object of the present invention is to mitigate those drawbacks, and a main object of the invention is to provide a cutting machine of the type including a rotary cutting wheel, which machine needs no special holding apparatus, such as suction means, etc. for holding the flexible material on the support surface.
Another object of the invention is to provide a cutting machine provided with improved sharpening apparatus providing excellent sharpening quality.
Another object of the invention is to provide a cutting machine designed so that the flexible material to be cut is automatically supplied onto the support surface.
Another object of the invention is to provide a cutting machine that automatically positions the flexible material transversely on the support surface, and that automatically controls the position of the flexible material relative to the cutting head.
To this end, the invention provides a cutting machine for cutting a flexible material in particular in the form of a single ply or of a lay-up of plies, the cutting machine including: material to be cut; said cutting wheel, and sharpening means for sequentially sharpening said cutting wheel; the table-top along two orthogonal displacement axes; and "tangential servo-control" axis.
According to the invention, said cutting machine is characterized in that: into which the cutting wheel can penetrate easily; vertical displacement means capable of displacing said head between a top position in which the cutting wheel is at a distance above the table-top, and a bottom position in which said cutting wheel pene
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Digital Controls
Pryor Sean
Rachuba M.
LandOfFree
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