Metal working – Means to assemble or disassemble – With means to regulate operation by use of templet – tape,...
Reexamination Certificate
1999-03-15
2001-04-17
Hughes, S. Thomas (Department: 3726)
Metal working
Means to assemble or disassemble
With means to regulate operation by use of templet, tape,...
C029S800000, C432S230000, C408S23900A
Reexamination Certificate
active
06216335
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to the field of machine tool accessories, particularly digitally controlled machine, machining centers, transfer machines or lines, by machining at high speed or in which a high precision of concentricity is required, and has for its object a device for automatically assembling and disassembling tools with a tool holder by thermal expansion of this latter.
BACKGROUND OF THE INVENTION
The principle of hooping has been known for a long time, also in the context of assembling tools/tool holders.
Thus, there exist at present devices for hooping tools/tool holders with manual intervention for ensleeving, requiring the rotation of the tool holders, which do not guarantee the complete ensleeving over the desired height (with risk of loss of the tool being machined), and again others which do not have a safety of use necessary for industrial employment.
Moreover, the heating of the tool holders or of the tool/tool holder assembly is carried out at present either by direct application of flame, or by projection of radiant heat or a flow of hot air or again by conductive contact, the use of the two first heating techniques being often delicate in an industrial setting and the third heating technique being less efficacious in giving rise to too long a heating time.
Moreover, none of the known processes or device permits limiting heating to a value just enough to assemble or disassemble the tool with the tool holder.
SUMMARY OF THE INVENTION
The present invention has for its object to overcome these drawbacks by providing particularly an assembly and disassembly device permitting the rapid mounting and unmounting of tools under conditions of optimum safety, whilst using only the temperature just necessary for ensleeving (or separation) so as not to damage the tool holders by overheating.
To this end, the present invention has for its object a device for assembling and disassembling a tool with a tool holder, such as particularly a mandrel, characterized in that it is essentially constituted by a support frame provided with means for receiving and holding a tool holder and for means of ensleeving and extracting a tool coacting with a heating means by induction, of the portion of the tool holder adapted to receive the tool by ensleeving.
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Blount Steve
E.P.B. Emile Pfalzgraf (Societe Anonyme)
Hughes S. Thomas
Young & Thompson
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