Metal deforming – Tool and/or tool holder – Having unitary tool-face
Reexamination Certificate
1998-10-29
2002-05-21
Jones, David (Department: 3725)
Metal deforming
Tool and/or tool holder
Having unitary tool-face
C470S138000
Reexamination Certificate
active
06389873
ABSTRACT:
DESCRIPTION
The present invention relates to a tool-holder for machine-tools. In particular, the present invention relates to a tool-holder particulary usable in forging machines employed for the production of bolts and screws, and suitable to constitute the support for the forging punch or punches.
As is known, in the field of the production of screws, rivets and the like, obtained by cold deformation of wire lengths, special machines are used that carry out sequentially different working operations starting from a semi-finished product, constituted by a wire having a suitable cross-section, which unwinds from a skein.
In the forging machines of the known art, one of the basic problems is associated with the type of product to be obtained in terms of size, or the necessity of systematically replacing the forging members whenever the type of artefact to be made changes. Raw screws or rivets or like small items are in fact obtained on the forging machines by means of special forging tools, in particular by punches caused to be integral with a special support and to co-operate with a matrix restraining the wire that constitutes the semi-finished product.
Therefore, whenever the product to be obtained changes, it is necessary to replace said punches and the related support with others having suitable shape or size, which involves difficult adjustments, with ensuing delays in the time of preparation of the machine.
The object of this invention is to obviate the aforesaid drawback. More particularly, the object of this invention is to provide a tool-holder for machine tools, especially a punch-holder applicable to forging machines employed for the production of bolts and screws, suitable to be easily installed and replaced, with no need for complex adjustments.
A further object of the invention is to provide users with a tool-holder as defined above, such as to ensure a high level of resistance and reliability over time, and also such as to be easily and economically realised.
These and still other objects are achieved by the tool-holder for tool machines of the present invention, in particular a tool-holder for machine tools employed for the production of bolts and screws, provided with an oscillating plate and connected to a plate-like support by means of screws and adjustable on the same by means of eccentrics, characterised in that said plate-like support bearing at least a punch-holder is interchangeably integral on the oscillating plate of the forging machine by means of two or more screws.
REFERENCES:
patent: 2104297 (1938-01-01), Friedman
patent: 2305049 (1942-12-01), Wilcox
patent: 2595433 (1952-05-01), Wilcox et al.
patent: 3101632 (1963-08-01), Hoyt
patent: 4170123 (1979-10-01), Berger
patent: 4397172 (1983-08-01), Garlaschi
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