Metal working – Plural diverse manufacturing apparatus including means for... – Binding or covering and cutting
Patent
1992-07-28
1994-06-14
Rosenbaum, Mark
Metal working
Plural diverse manufacturing apparatus including means for...
Binding or covering and cutting
72129, 72132, 72134, 140112, B21F 3100
Patent
active
053198336
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an apparatus for producing coils from spring steel material.
Coils of spring steel material are an intermediate product in the production of all-metal spring cushions. The material was hitherto manually cut to length and coiled. The outer end of the piece of material is fixed manually by a steel wire to the underneath layers. This fixing must be secure so that the outermost layer of material holds firm reliably not solely at the time.of the step of compacting the material in a press, but also later at the time of use of the spring cushion, in order that the spring cushion does not unwind or in order that there is no risk of injury.
The present invention intends to provide an apparatus which facilitates automated production of coils from spring steel material.
This object is achieved according to the invention by an apparatus shown in the drawings.
The present invention has an advantage with regard to the simple and reliable gripping of spring steel material.
With the development of the invention according to one embodiment it is ensured tha at the time of movement of the conveyor am in one direction, the gripping means come automatically into engagement with the material, whereas the withdrawal of the conveyor arm in the other direction automatically results in a removal of the gripping means from the material. Thus, at the time of the with-drawal, the gripping means are able to slide on the spring steel material and do not need to be raised completely from the material. Thus the returning conveyor arm may grip and brake the material, which is an advantage with regard to a clean and uniform coiling of the material.
The development of the invention according to another embodiment is an advantage with regard to reliable gripping and good alignment of the gripped section of the spring steel material with the plane of movement of the conveyor arm. If areas of the end of the material were to hang down, then the location of the end of the material on the winding spindle would be made more difficult.
With the development of the invention according to another embodiment it is ensured that when applying the first layers of material to the winding spindle, the conveyor arm can still slide on the material and press on the latter. The increase in diameter of the coil is in this case compensated for by tilting the end section of the conveyor arm. At the time of withdrawing to the initial position, the conveyor arm then travels with sliding friction on the upper side of the material, the tiltable end section returning increasingly to the position aligning with the main section of the conveyor am. In this case, the tiltable end section, which supports the gripping means, stretches and extends the material and thus contributes to uniform winding.
The development of the invention according to another embodiment is an advantage with regard to a reliable return of the tiltable end section of the conveyor arm into the position aligning with the main section of the conveyor arm and with regard to a uniform tensioning and spreading action upon the return of the conveyor arm.
In an apparatus according to another embodiment, the front and rear end position of the conveyor arm can be adjusted in a simple manner. A readjustment of these end positions is then respectively necessary if one changes from one type of coil to another type of coil.
The development of the invention according to another embodiment has the advantage that one can use winding spindles of different diameter. One can thus produce sleeve-like coils with a different internal diameter on the same apparatus and for conversion one needs solely to tilt the common frame of the cutting station and conveyor arm guide so that the conveyor arm runs substantially tangentially to the winding spindle.
The development of the invention according to another embodiment is an advantage with regard to solid and tight winding of the material strip on the winding spindle.
In an apparatus according to another embodiment, between the adjacent pressing fingers o
REFERENCES:
patent: 3952569 (1976-04-01), Lauterjung
patent: 4365492 (1982-12-01), Kortan et al.
Hoffmann Martin
Kohl Hans
Weinschenk Jorg
Philpitt Fred
Rosenbaum Mark
Stop-Choc Schwingungstechnik GmbH
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