 Artificial turf-like product |
| Accordingly, the primary and principal object of the present invention is to provide a synthetic ... |
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| Top dressed plating surface with resilient underpad |
| OF THE PREFERRED EMBODIMENTS The drawing figure comprises a sectional view through a playing ... |
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| Synthetic grass playing field surface |
| Referring to the drawings, the playing field surface 10 comprises a stabilized base or support ... |
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| Golf driving mat |
| Accordingly, it is a principle object of the invention to provide a golf practice mat comprised of ... |
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| Turfing systems for stadia |
| In accordance with this invention a plurality of turf units for forming a continuous natural grass ... |
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| Process of laying synthetic grass |
| OF PREFERRED EMBODIMENTS With reference to FIG. 1, the invention relates to a synthetic grass turf ... |
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| Synthetic turf |
| It is the purpose of the present invention to provide an improved synthetic grass sports surface ... |
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| Synthetic turf game surface |
| FIG. 1 schematically illustrates a fragment of a synthetic turf pile carpet 10. The carpet has ... |
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| Method of making a ceramic capacitor |
| Accordingly, a principal object of the present invention is to provide a ceramic capacitor which ... |
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| Ion mobility spectrometer drift chamber |
| Therefore it is the object of the invention to improve a drift chamber of the kind mentioned above ... |
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Forming tool
| Details |
Inventors: Hellgren, Keijo;
Assignee: Avure Technologies AB (Vasteras, SE)
Primary Examiner: Jones; David B.
Assistant Examiner:
Attorney, Agent or Firm: Harness, Dickey & Pierce, P.L.C.
The invention relates to a forming tool for forming sheet blanks in a diaphragm press of the kind comprising an openable, closed pressure chamber, which is divided in a gas and liquid tight manner by means of a flexible diaphragm. The forming tool is arranged on one side of the diaphragm and a sheet blank to be formed is arranged between the forming tool and the diaphragm. The opposite side of the diaphragm is pressurized by a fluid being supplied at high pressure to cause the flexible diaphragm to deform and, thus, the sheet blank to be pressed against the forming tool. The forming tool comprises an elongate cutting and flanging tool along at least part of its periphery and/or around an intended opening in the sheet blank. |
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DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION In the following, an embodiment will be described in which the forming tool is used for forming sheet-metal blanks for the automotive industry.
FIG.
1 is a cross section through a diaphragm press 1.
The latter includes a bottom tray 2 and an upper part 3, which, when brought together as shown in the figure, define a closed pressure chamber 4.
A flexible diaphragm 5 is arranged between the bottom tray 2 and the upper part 3, which diaphragm provides a gas and liquid tight shield between the bottom tray 2 and the upper part 3.
A forming tool 6 according to the invention having an annular cutting and flanging tool 7 is arranged in the bottom tray.
Edge elements 8 with schematically illustrated stretching means 9, 9' are provided between the forming tool 6 and the side walls of the bottom tray 2, and both the forming tool and the edge elements 8 rest on a bottom plate 10.
In connection with forming using the diaphragm press shown, a sheet-metal blank 11 to be formed is arranged between the forming tool 6 and the diaphragm 5, two opposite side edges thereof being inserted in the stretching means 9, 9', as shown in FIG.
1.
The stretching means 9, 9' allow the sheet-metal blank to be prestretched in one direction to the yield point of the material, or preferably slightly beyond the yield point.
An excess pressure is then applied in the press chamber 4 on the upper side of the diaphragm 5 by a liquid, preferably oil, being supplied at high pressure by means of a schematically illustrated pump 12 from a storage tank 13.
Since the pressure on the upper side of the diaphragm 5 is increased, the latter will be pressed against the sheet-metal blank 11 and the forming tool 6, the shape of whose upper side corresponds to the desired shape of the formed end product.
FIG.
2 is a schematic top view of the bottom tray 2 with a forming tool 6 arranged therein.
The forming tool shown in the figure is intended for forming sheet-metal blanks into car hoods and the annular cutting and flanging tool 7 extends along the peripheral edges of the car hood to be formed
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Metal Working 
