Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1984-09-21
1987-03-03
Goldberg, Howard N.
Metal working
Method of mechanical manufacture
Assembling or joining
29155R, 29433, B21D 3900, B23P 1700, B23P 1904
Patent
active
046464166
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a method for manufacturing thermo-insulated compound profiles for windows, doors and facades, wherein two metal profiles to be joined to form a compound profile are provided with longitudinal grooves into which connecting webs forming an insulating chamber together with the metal profiles are inserted, and secured at their base portions, engaging in the longitudinal grooves, by means of the deformation of the retaining strips bounding the longitudinal grooves.
Numerous methods of this type are known, especially from the printed matters German Auslegeschrift 2,559,599, German Auslegeschrift 2, 604, 670 and German Pat. No. 2,755,669. Both the German Auslegeschrift 2,559,599 and the German Auslegeschrift 2, 604, 670 make provision for a forming tool to be moved through between the insulating connecting webs in the profiled inside chamber formed by the connecting webs together with the metal profiles, the forming tool being intended to press the four retaining strips of the metal profiles pointing towards the profiled inside chamber simultaneously against the connecting webs. However, this results in obvious difficulties in compensating production tolerancies of the parts to be joined together, which in turn can result in the forming tool not applying the same pressure to all retaining strips, and consequently the compound profile does not receive adequate shear strength.
Whereas the German Auslegeschrift 2, 604, 670 does not take into account the above aspect, according to the German Auslegeschrift 2, 559, 599 the drawing mandrel used there for tolerence compensation is to be split in the longitudinal direction or equipped with fork-like legs, so that these mandrel parts can each be pressed individually under spring force. Apart from the costly construction of the drawing mandrel resulting from this, which in practice is scarcely possible to realise for compound profiles with small inside chambers, it still appears that no satisfactory production properties can be achieved by this, because in the German Pat. No. 2, 552, 700 originating in a divisional Application to the German Auslegeschrift 2, 559, 599 further expensive measures for improving such a type of compound profile have been claimed.
Although the method according to the German Pat. No. 2, 755, 699, also listed as prior art, is no longer encumbered with previously mentioned defects, it is not nearly suitable for every type of profile section to be met with; this especially applies when there are undercuts in the metal profiles. To this extent its application possibilities are severely limited, which in turn represents a quite considerable disadvantage.
The object of the invention is to develop a method for manufacturing thermo-insulated compound profiles, which, despite unavoidable production tolerancies of the metal profiles and connecting webs, insures absolute dimensional accuracy and uniform strength properties of the compound profiles manufactured in the manner according to the invention. In this connection, it is not only to be suitable for every profile section to be met with, but also for all profile sizes, in order to make it possible to retain already existing profile series and in order not to prevent the development of new profile forms. A further object of the invention is to create a device suitable for implementing the desired method, this device facilitating a continuous production sequence which is arranged for large quantities and is therefore cost effective.
The measures proposed with this invention for achieving the set objects follow from the patent claims.
The combined pressing, selected for the first time by this invention, over the inner and outer retaining strips with the base portions of the connecting webs inserted in the longitudinal grooves of the metal profiles provides the pre-condition for making it possible to manufacture each compound profile form without difficulty and completely unimpaired in strength by dimensional deviations of the parts to be joined together. Consequently this new type o
REFERENCES:
patent: 3606658 (1971-09-01), McConnell
patent: 4194284 (1980-03-01), Diels et al.
patent: 4213236 (1980-07-01), Diels et al.
patent: 4245384 (1981-01-01), Egerer
Fogiel Max
Goldberg Howard N.
Nichols Steven
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