Gear cutting – milling – or planing – Milling – Cutter spindle or spindle support
Patent
1993-03-10
1995-08-22
Briggs, William
Gear cutting, milling, or planing
Milling
Cutter spindle or spindle support
408239R, B23C 526, B23B 3102
Patent
active
054433401
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a coupling system between a workpiece and/or a tool carrier, such as, for example, a tool system module, for example, in the form of a tool receptacle and an associated manipulator, such as, for example, a machine tool configured, for example, as a drill, a lathe or a milling machine, according to the defining portion of patent claim 1. The coupling system shall be suitable for both fixed and moving workpiece or tool carriers, such as, for example, tool system modules.
The most recent technical developments towards automated processing centres has given rise to the need for modular tool systems, which must be changeable with the smallest possible expenditure of time.
A series of coupling systems for use between individual tool system modules have been developed and proposed, and these have been suitable for both fixed and for rotating tools. An attempt has been made to transfer these modular couplings to the point of intersection between the machine tools and tool system modules. However, in this connection it has been shown that it is difficult to so configure the coupling system that it can meet must be exchangeable with the least possible time expenditure. A number of coupling devices between individual tool system modules suitable for stationary and also for turning tools have been developed and proposed. It has been attempted to transfer these modular couplings to the interface between machine tool and tool system module. But in doing so, it has proven difficult to configure the coupling device so that it equally fulfills the requirements concerning stability, positioning accuracy, lubricant supply of the tool and the capacity to automate tool change.
Therefore, recently, from the journal "Moderne Fertigung" [Modern Manufacturing], issue of Nov. 1986, there has become known a coupling device with the essential features of the introductory clause of claim 1 in which a cone connected to the actuating rod of the clamping device presses two clamping bodies, diametrically offset to one another, radially outward into suitably formed recesses of screws that are screwed radially from the outside into the spindle carrier. The recesses in the screws, like the surfaces of the clamping bodies engaging in them, are made cone-shaped, and a certain axis offset is provided between the cone of the screw recess and the cone of the clamping body, so that, when the clamping bodies are pressed radially outward, an axially oriented pressing force is generated between the parts to be coupled. Here the support is provided by relatively large radial plane surfaces, resulting in a relatively great rigidity of the system. In any case, these plane surfaces cannot be used for the entirety of the transfer of the pressing force, since carrier pins oriented normal to these plane surfaces must be provided that for an indexing of the tool the demands for stability, positioning precision, lubrication of the tool, and the potential for automation of the tool change process.
Thus, the journal Moderne Fertigung, Nov., 1986, describes a coupling system as set out in the defining portion of patent claim 1; in this a cone that is connected to the operating rod of the clamp system forces two diametrically opposed clamp bodies radially outwards into correspondingly formed recesses in screws that are screwed radially from the outside into the spindle receptacle. The recesses in these screws, like the surfaces of the clamp bodies with which they come into contact are conical, and there is provision made for a specific shift in the axis between the cone of the screw recess and the cone of the clamp body, so that when the clamp bodies are forced radially outwards an axially directed contact force is generated between the elements that are to be coupled. When this is done, support is effected over a relatively large radial plane surface, which results in a relatively high degree of rigidity in the system. However, not all of these plane surfaces can be used to transfer the pressure force, because driver pins that ar
REFERENCES:
patent: 4135848 (1979-01-01), Hughes
patent: 4844671 (1989-07-01), Reinauer
DIN-Blatt 6366, Apr. 4, 1964, 3 pp.
Effenberger Wolfgang
Friedl Franz
Reinauer Josef
Briggs William
Gottlieb Guhring KG
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