Method of fastening a tool in a tool holder
OwnerSvend-Helge Sell Sørenseninventor
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Abstract
The present invention is for a method of fastening a tool holder. The tool (2) has a front side (6) shaped for use in cold forming of metal wire into nails, screws, etc. The tool holder (4) has a recess (8) shaped for receiving the tool (2). When the tool (2) is fastened in the tool holder (4), compressive stresses are initially present in the tool (2). The tool (2) is subjected to tensile stresses caused by the nail making process when in the tool holder (4). In order to reduce the resulting tensile stresses, the two opposite and wedge-shaped sides (10, 12) of the tool (2) are compressed against corresponding sides (14, 16) in the recess (8) by applying and maintaining pressure on the back side (18) of the tool with fastening means (20).
Claims11
A tool for use in cold forming of metal wire into nails and screws comprising a front side shaped for said use and an oppositely placed back side, wherein the tool has two opposite sides forming a wedge-shape that is narrower towards the front side of the tool and is formed with an angle between 0.5 and 45 degrees, the tool is configured for fastening in a tool holder having a recess for receiving the tool, and fastening means for fastening the tool by application and maintenance of pressure on the tool such that the two opposite sides may be pre-stressed in the recess.
A tool holder for receiving and fastening a wedge-shaped tool for use in cold forming of metal wire into nails and screws, said tool holder comprises a recess shaped for receiving the tool, wherein the recess in the tool holder comprises two sides forming a wedge-shape that is narrower towards an open end of the recess and is formed with an angle between 0.5 and 45 degrees, the tool holder comprises fastening means configured for fastening the tool by application and maintenance of pressure on the tool so that the tool may be pre-stressed in the recess against the sides.
A tool system comprising a tool and a tool holder, said tool has a front side shaped for use in cold forming of metal wire into nails and screws, said tool holder comprises a recess shaped for receiving the tool, wherein the tool has two opposite sides forming a wedge-shape, said wedge-shape is narrower at the side located towards the front side of the tool and is formed with an angle between 0.5 and 45 degrees, the recess in the tool holder comprises two corresponding sides which are placed substantially in the same wedge-shape, the tool comprises a back side that is sloped relative to a bottom side of the recess, a wedge is placed with one side against the back side of the tool and the opposite side against an end side of the recess, said wedge comprises a hole, a bolt is connected to the tool holder through said hole, and the tool is fastened in the recess by tightening the bolt against the wedge.
A method of fastening a tool in a tool holder with fastening means, said tool comprises a front side shaped for use in a cold forming of metal wire and said tool holder comprises a recess shaped for receiving the tool, wherein the tool comprises a back side and two opposite sides forming a wedge-shape that is narrower at the side towards the front side of the tool, said wedge-shape being formed with an angle between 0.5 and 45 degrees, the recess in the tool holder comprises two corresponding sides placed substantially in the same wedge-shape, and wherein the method comprises the steps of:
- placing the tool in the recess,
- displacing the tool substantially in the direction of the front side of the tool, and
- compressing the two opposite sides of the tool against the corresponding sides of the recess, and
- introducing compressive stresses between said two opposite sides in the tool by applying and maintaining pressure on the back side of the tool with the fastening means, said compressive stresses being introduced at least in a region by the front side of the tool.
Dependencies are inferred from the claim text.