US2923407A - Horizontal metal extrusion press - Google Patents

Description

Feb. 2, 1960 P. BILLEN 2,923,407

HORIZONTAL METAL EXTRUSION PRESS Filed April 16, 1956 2 Sheets-Sheet 1 Feb. 2, 1960 P. BILLEN 2,923,407

HORIZONTAL METAL EXTRUSION PRESS Filfid April 16, 1956 2 Sheets-Sheet 2 i M i=5 Ila I I I I4 I m/ 164 mm flu" 115 L ama 2,923,401 HORIZONTAL METAL EXTRUSION PRESS Peter Billen, Leverkusen-Kuppersteg', Germany, tissigiror In horizontal metal tube and rod extrusion presses in which the container or receiving cylinder supports rest on hearing plates the latter are located at the foot of the press, for instance, at about the same level as the lower tie rods or tension columns. Especially in steel tube presses it is a disadvantage that the low position of the bearing plates exposes them to fouling by scale and so forth. Moreover, when the receiving cylinder is open they impede accessibility. The provision of protecting caps would create additional obstructions without satisfactorily fulfilling their intended purpose of preventing the bearing plates from being fouled.

It is the object of the present invention to overcome the stated inconvenience. The invention consists in that the bearing plates are located above the main central axis of the press (that is to say, the common axis of the pressure cylinder, the receiving cylinder and the die), for instance at the level of the upper columns. The bearing surfaces may be disposed in planes passing through the said axis of the machine in a manner known in itself to enable the receiving cylinder to be aligned with the same accuracy as heretofore.

It is preferred to arrange the bearing plates on supporting beams with their ends supported on the one hand on the pressure cylinder and on the other on the bolster frame. The supporting beams may be hollow to permit the columns to be disposed within the beams. In such a form of construction the ends of the supporting beams may be supported directly on the tie rods or columns instead of being secured to the pressure cylinder and the bolster frame. In view of the length of the supporting beams and the great weight of the receiving cylinder the supporting beams might tend to twist because the actual bearing surfaces for the receiving cylinder are canted. To prevent the beams from twisting the two supporting beams are braced, preferably by means of one or more transverse interconnecting supporting members, preferably disposed between the centers of the beams.

An illustrative form of construction of the present invention, adapted to a horizontal press intended primarily for extruding steel, is shown in the accompanying drawings in which:

Figure 1 is a vertical section along I-I in Figure 2, and

Figure 2 is a section along II-ll in Figure 1, shown on a larger scale.

1, 2, 3 and 4 are the tension columns or tie rods of the press which connect the pressure cylinder 20 and the bolster 21. The cylinder 20 contains a pressure piston 22 with a ram 23 attached thereto and is movable in the conventional manner hydraulically or by means of steam.

For extruding a steel ingot the ram can be forced into the orifice 6 of a container or receiving cylinder 7 and can squeeze the material through a die 26 carried by a die holder 24 held by the bolster 21. The columns 3 and 4 are below the working platform 5. The level of this platform is indicated in Figure 1 at the extreme, righthand and left-hand sides, the intermediate part being- Patented l' 'eb. 2, 1960 2 omitted for the sake of clearnes's. The receiving cylinder 7 is suspended in a holder 8 with a pedestal 9 the lower extremity 10 of which runs in a slideway 11 formedby two U guide rails 12. 13 are the two draw bars for moving the receiving cylinder longitudinally. The upper exterision of the holder 8 for the receiving cylinder rests on bearings 14, the outer semi-cylindrical surfaces 14a of which permit a rotary movement in the holder 8 in a manner known per se. The bearings 14 are supported on heating plates 15 resting on supporting beams 16 which are mounted with one end against the pressure cylinder 20 and with the other end against the bolster 21. The supporting beams 16 are longitudinally bored, each beam enclosing one of the columns 1 and 2, and their lower portions 16a embrace the shoulders (Figure 2) of the holder 8 of the receiving cylinder. The portions 16a are secured to thepressure cylinder by means of screws 27. They are afiixed to the bolster 21 in a similar manner but this is not shown in the drawing. The sliding surfaces of the bearings 14 and of the bearing plates 15 lie in axial planes of the machine, as indicated by the dotted lines 17. The bearing plates 15 or the bearings 14 may be adjustable in a manner known per se but not specially shown in the drawings to permit the holder of the receiving cylinder to be centered in the press. The two beams 16 are connected together by transverse mem-' bers 18 inserted from above between the beams 16, so as to bear against the beams along the surfaces 18a. The insertion of these transverse interconnecting supporting members 18 prevents the beams from being twisted under the load of the receiving cylinder. Dust protectors 19 are likewise provided and these may also serve to carry away cooling water sprayed onto the bearing plates 15 for instance from perforated pipes 25 v(Figure 2).

The form of construction that has been described removes all obstructions from the working platform 5, as all the supporting members 16 and 18 for the receiving cylinder are at a height that permits a man to stand up right underneath them. Accessibility of the press and more particularly of the tools has therefore been considerably improved by comparison with the known conventional types of press. Moreover, the bearing plates 15' are better protected from dirt and injury because they are and the bolster. Moreover, the beams might be omitted and the bearing plates 15 directly mounted on the columns, but adjustment would then be rather diflicult.

What is claimed is:

1. A horizontal press for the extrusion of metal, comprising: a pressure cylinder, a pressure piston reciprocable in the pressure cylinder, a ram secured to the pressure piston, a bolster, a die-holder held by the bolster, a die carried by the die-holder, the die being co-axial with the ram, tie rods connecting the pressure cylinder with the bolster above and below the axis of the die and the ram and including two tie rods above said axis, two bearing plates carried by the two upper tie rods, a billet container co-axial with the die and the ram, said billet container having supporting faces overlying the bearing plates, said faces bearing upon and supported by said bearing plates, said bearing plates and said supporting faces providing the sole means for supporting the weight of said billet the die.

2. A horizontal press forthe extrusion of metal, com, J

prising: a pressure cylinder, a pressure piston reciprocable pressure cylinder, two of the tie-rods being located above thezaxis of the ram, a die-holder held bythe .bdlstetg a the ram, hollow supporting beams enclosing the two upper tierods located above the axis of the ram and of fue die and-bearing at one end against the pressure cylinder and at "the other end against the bolster, two planebearl said bearing plates, said bearing plates and 'die carried by the die-holder, the die being co-axial with 7 in-the pressure cylinder, a ram secured to the pressure said supporting .faces providing the sole means for suppiston, 21 bolster, tie-rods connecting the bolster with the" porting the weight of said container.

References Cited in the fileof this patent UNITED STATES PATENTS 896,684 Benjamin Aug. 18, 1908 1,574;792 Clark Mar. 2, 1926 1,944,982 Hoy Jan. 30, 1934 2,075,803 Dinzlet a1. j Apr. 6,1937 2,778,495 Kraizse Janq22, 1957 FOREIGN PATENTS 1,059,568

Images