Tool changing – Tool transfer to or from matrix – Matrix including means to latch tool
Patent
1990-07-24
1992-10-13
Bilinsky, Z. R.
Tool changing
Tool transfer to or from matrix
Matrix including means to latch tool
483 3, 211 151, B23Q 1300
Patent
active
051546868
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a tool holder with a protective hood with a conical part and a draw-in member connected thereto, wherein the protective hood has a cover piece, which is adapted to the conical part and envelops this conical part so as to be soil-proof, and a flexible clamping device, which locks detachably the draw-in member, wherein the draw-in member has a notch, and the flexible clamping device has a stop tab, which engages with the notch by means of a projection formed on the flexible end.
Such tool holders serve as chucks for different cutting tools such as drill, milling machine, grinding attachments, etc. The tool holder itself is clamped into a machine tool and driven by this machine tool. Such a tool holder has generally a conical part, which is received by a corresponding cone-shaped fitting shape of the machine tool. To clamp into the machine tool, the tool holder is provided with a notch in the bottom part and a draw-in cone, which is fastened above the conical apex and which also has a notch.
Handling the tool holder requires that the sensitive tapered face be handled with care. If this tapered face becomes dirty, for example, due to the coolant of the cutting tool or the fine metal chips generated during cutting and the tool holder is inserted in this state into the machine tool, deposits and indentations form along the tapered face of the tool holder and machine tool. The penetration of the coolant can also cause corrosion.
The result is that the seat of the tool holder is no longer precisely defined but rather receives a slight play so that the cutting tools can no longer be accurately guided.
It is known to insert the tool holder, turned by 180.degree. when changing, into a receiving box. Such a storage results in the coolant located at the tool running downwards on the tapered face and soiling it. On the other hand, manual manipulation of the tool holder in the reverse position is dangerous because a user can readily slip when grasping the holder and be injured on a sharp cutting tool.
In the U.S. Pat. No. 4,196,506 an automatic tool changer is described in which the tool holder having a conical part and a draw-in member is received in the protective hood during its storage and transport. At the same time at the upper part a horizontally pivotable pawl is provided with a stop, whose shoulder can be made to engage with a flange of the tool holder, the pawl being under spring prestress.
In a tool store according to U.S. Pat. No. 4,182,021 a tool holder is held detachably in a protective hood; to this end, two clamps that are under spring pressure and provided at the protective hood grasp a tapered shaft segment of the tool holder.
SUMMARY OF THE INVENTION
Therefore, the object of the present invention is to provide a device, which permits a simple and reliable manipulation of the tool holder, the tapered face being protected during handling.
This problem is solved by the invention with a tool holder with a protective hood, as claimed in claim 1.
The notch of the draw-in member forms, when engaged with the projection of the stop tab, a point of rotation around which the tool holder can be swiveled. During this swivelling movement, the conical part pushes via the pressure region the stop tab outwardly so that the notch of the draw-in member is released.
The tool holder has preferably a draw-in member, which has a notch or recess, in which a stop tab with projection provided in the protective hood engages, in order to lock the tool holder. Thus, it is possible to introduce the tool holder in any rotary position.
Furthermore, it is preferred that the center section of the stop tab have a pressure region or pressure head, which makes contact with the introduced tool holder. The pressure region serves to unlock the stop tab. Preferably the protective hood is designed in such a manner that the introduced tool holder has a degree of freedom of movement. The notch of the draw-in member forms, when engaged with the projection of the stop tab, a point of
REFERENCES:
patent: 3715801 (1973-02-01), Sato et al.
patent: 3844028 (1974-10-01), Hague et al.
patent: 4069918 (1978-01-01), Inoue et al.
patent: 4182021 (1980-01-01), Kato et al.
patent: 4196506 (1980-04-01), Reed
patent: 4312111 (1982-01-01), Peiser et al.
patent: 4509649 (1985-04-01), Evans
Bilinsky Z. R.
Daulton Julie R.
Klarer Christoph
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