US2039947A - Hydraulic press for extruding metal rods or tubes - Google Patents

Description

Ma'y 5, 1936. ,..A 2 0395947 a HYDRAuLic "Pfi'Ess"FoR Exmunme METAL RODS on TUBES Fiiedl Dec. 1, 1954 INVENTOR.

BY 2 a SZ A TTORNE Y.

Patented May '5, 1936' HYDRAULIC rnEss non nx'munmc- METAL nons on Tunas Heinrich Albers, Dusseldorf, Germany, assignor to Schloemann Aktiengesellschaft, Dusseldorf, Germany, a corporation of Germany Application Decanber 1, 1934, Serial No. 755,581

In Germany December 18, 1933 2 Claims. L 207-16) My invention relates to a hydraulic press for extruding metal rods or tubes and particularly to the means for removably fastening the billet container of such a press to its frame.

In old presses of this type, the container is generally fastened to the frame of the press by meansof screw bolts. When the press is operated, heated billets are continuously introduced into the container, so that the latter assumes a very high temperature and so do also the bolts at their ends which are attached to the container, whereasthe bolt ends attached to the frame remain relatively cool. Under theseconditions, there exists a great difference of temperature between both ends, of

5 each bolt, which in view of the rigid connection, at

these ends, causes yery heavy bending and te sioning stresses in ."the bolts and leads to their jamming, warping or even breaking. This is the case particularly with such containers which I are provided with special heating means.

It is an object of the present invention to provide a press of'the above kind in which the fastening bolts for the billet container are not is subjected toundue stresses on account of differences in temperature at' their two ends. I attain this object by a pivotable mounting at one end of thei'bolts, preferably at that attached to the press frame, whereas the other end may be rigidly but removably connected to the container, e. g. by nuts or any other suitable means, the parts of the bolts between said ends not engaging the container or the frame. When the pivots of the bolts are suitably arranged with 35 respect to the container. the bolts will freely fol,-

low all forces exerted on them caused by the heat of the container by rocking about their pivots so that any jamming, warping or breaking of the bolts will be prevented, even when said forces are 40 excessive.

For removing the container fromthe pressfrhme, it is only necessary to loosen its connection with the bolts, whereafter the latter can be swung aside about their pivoted ends, whereas the other 45 ends of the bolts, which are connected to the press frame can be left untouched. I can therefore extend the bolts down below the press frame and arrange the pivoted mounting there without interfering with the ready removalsof the con- 50 tainer, whereby the length 'of the bolts can besubstantially increased and the stresses to which they are subjected by the heat from the container are still further decreased.

I willnow describe my invention more fully in 55 dotall,-wi th reference to the annexed drawing v which is a side view, partly in section, of a press e b y ng my novel fastening means for the bil let container.

In the drawing, l designates the frame of a vertical hydraulic press for the extrusion of metal 5 rods or tubes, 2 designates the inner part of the billet container proper with the die 3 inserted at its bottom, while 4 designates the outer part or jacket. A heating coil 5 is provided in a space between the container 3 and its jacket 4.

For removably fastening the container to the press frame, I provide bolts] which are pivoted at 1 to the baseof frame I and are secured by nuts 8 to slotted lugs 8 on the jacket I. For removing the container, it is only necessary to loosen the nuts 8 and then to swing the bolts 6 aside about their pivots I into the position shown in broken lines in the drawing. It will be apparent that the bolts are stopped in their swinging 20 movement-by abutting against the inner walls of the frame I.

. During operation, the top ends of the bolts 6 will assume a temperature which is much higher than that of the bottom ends, since only the former are exposed to the heat of the container. The bolts 6 will therefore tend to elongate. The pivotable mounting of the bottom ends of the bolts makes it possible for them to freely follow such tendency, as it allows for an outward movement of the bolts. Undue stresses in the bolts ""wlth resulting jamming, warping or breaking are thus prevented.

It will be further seen that the bolts 5 are of considerable length whereby any stresses due to excessive heating are further decreased. In some cases, it may be'desirable, to curve the supporting surfaces of the nuts 8 on the lugs 9 about the axes of the pivots I as centers, but this will be j generally not necessary in view of the consider- 40 able distance of these surfaces from the pivots. I claim as my invention: i. In a hydraulic extrusion press, the combinationwith the'press-frame, of a billet container comprising a billet receiving inner part and a jacket surrounding the same, heating means located in a space between said inner part and said jacket, and elongated bolts having their one ends pivotally mounted on the lower part of said frame at a point remote from said container, the other ends of said bolts being adapted to engage said Jacket at a point away from the lower part of said frame, the intermediate portions of said bolts being out of engagement with said container and said frame.

2. In a hydraulic extrusion press, the oomother of said bolts being adapted to engage bination with the press-frame, o! a billet conin slotted lugs on said Jacket at a point away from tainer comprising a billet receiving inner part, the lower part of said frame, the intermediate and a jacket surrounding! the same, heating portions of said bolts being out of eng ment means located in a space between said jacket and with said container and said frame, and means 5' said inner part, elongated bolts having their one for securing said other ends of the bolts in said ends pivotally mounted on the lower part oi said lugs.

frame at a point remote from said container, the HEINRICH ALBERB.

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