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US 6,802,678 B2Granted
Tapping unit
AssigneePronic
InventorJean-Noël Augis
Life of this patent
Estimating the term…
Abstract
In a tapping unit according to the invention, the tap is held in a tap-carrier which is screwed into a pattern retained and fixed against rotation in a casing. The tap, the tap-carrier and the pattern form a subassembly mobile with limited amplitude in axial translation and radial displacement inside the casing, so that the tap can follow unwanted movements of the part being tapped.
Claims10
Tapping unit, including:
- a casing adapted to be fixed facing a part to be machined on a support of a machine tool and having an interior housing,
- a pattern including a bush with a tapped bore inserted axially in the interior housing of the casing and prevented from rotating by immobilizing means,
- a tap-carrier including means for receiving and retaining a tap, having a threaded section functionally engaged in the tapped bore of the pattern, and having a drive section,
- a drive shaft, rotatably mounted in the casing, having a bore receiving the drive section of the tap-carrier, which is adapted to slide longitudinally in it, and driven in rotation by a mechanical transmission driven by a motor,
- means which allow slight and limited radial movement of the tap in the casing about a mean radial position,
- and means which allow limited axial forward movement of the tap toward the exterior of the casing from a reference position and against the action of advance return spring means.
3 more elements
Press for forming and machining parts, including a tapping unit comprising:
- a casing adapted to be fixed facing a part to be machined on a support of a machine tool and having an interior housing,
- a pattern including a bush with a tapped bore inserted axially in the interior housing of the casing and prevented from rotating by immobilizing means,
- a tap-carrier including means for receiving and retaining a tap, having a threaded section functionally engaged in the tapped bore of the pattern, and having a drive section,
- a drive shaft, rotatably mounted in the casing, having a bore receiving the drive section of the tap-carrier, which is adapted to slide longitudinally in it, and driven in rotation by a mechanical transmission driven by a motor,
- means which allow slight and limited radial movement of the tap in the casing about a mean radial position,
- and means which allow limited axial forward movement of the tap toward the exterior of the casing from a reference position and against the action of advance return spring means,
- the casing of the tapping unit being fixed to a part-carrier of the press with the tap facing toward the part to be machined, so that the freedom of radial and axial movement of the tap allows it to follow unwanted movements of the part to be machined on the part-carrier during tapping.
4 more elements
Dependencies are inferred from the claim text.