US3350910A

US3350910A - Hydraulic extrusion press with improved supporting frame structure

Info

Publication number: US3350910A
Application number: US412068A
Authority: US
Inventors: Muller Ernst
Original assignee: Hydraulik GmbH
Current assignee: Hydraulik GmbH
Priority date: 1964-11-18
Filing date: 1964-11-18
Publication date: 1967-11-07
Anticipated expiration: 1984-11-07

Description

Nov. 7, 1967 E. MULLER HYDRAULIC EXTRUSION PRESS WITH IMPROVED SUPPORTING FRAME STRUCTURE 4 Sheets-Sheet 1 Filed Nov. 18, 1964 wvmro/g ERA/S T MUL L 5/? r J /MW A ram/s Y:

NOV. 7, 1967 MULLE 3,350,910

. HYDR 1c EXTRUSION PRES I IMPROVED UPPORTING FRAME STRUC RE Filed Nov, 18, 19 64 4 Sheets-Sheet 2 V s y INVENTOR} r z-vwsr MOLLEI? A TTORA/EYJ'.

7,1967 E. MULLER 3,350,910

HYDRAULIC EXTRUSION PRESS WITH IMPROVED SUPPORTING FRAME STRUCTURE Filed Nov. 18, 1964 4 Sheets-Sheetti E. MULLER RUS Nov. 7, 1967 HYDRAULIC EXT ION PRESS WITH IMPROVED SUPPORTING FRAME STRUCTURE 4 Sheets-Sheet 4 Filed NOV. 18, 1964 INVE/VTOR .m/sr Mam-2 rron/ms.

United States Patent M 3,350,910 HYDRAULIC EXTRUSION PRESS WITH IM- PROVED SUPPORTING FRAME STRUCTURE Ernst Miilier, Duisburg, Germany, assignor to Hydraulik G.m.b.H., Duisburg, Germany Filed Nov. 18, 1964, Ser. No. 412,068 11 Claims. (Cl. 72-453) ABSTRACT OF THE DISCLOSURE A hydraulic extrusion press is disclosed which includes an improved frame structure composed of side plate elements or assemblies which include a plurality of plate members with a common longitudinally elongated opening. The side frame members are held together by cross frame members to form a box-like structure and the press parts are separately supported within the box-like structure on a foundation. A feature of the invention is that the press parts bear in outward opposite directions against the side frames, and for this purpose a cross head with the movable part has an extension which bears laterally through the opening against the end wall bounding the opening of the side frame. A receiver of the press has an adapter extension which extends outwardly from each side and bears through the openings of the side frames in an opposite direction against the opposite ends of the openings of the frame members.

A further feature of the invention resides in the separate support of the press elements on guideways which are supported directly on a foundation and provide for sliding movement of the movable part of the press. In addition, the cross frame members of the press supporting structure are such that they are provided with recesses so that they may engage over projections defined on the side frame members to provide a structure which is rigid but permits relative expansion of the parts. The side frame members are advantageously made of a laminar of a plurality of individual plates to form a very strong structure which provides ample support for the movement of the press parts. The press parts during operation will place the side frame members substantially only in traction.

By providing plate frames which are stressed substan tially only under tension and which include window-like recesses or openings, the construction costs are extremely low and the lateral accessibility of the parts is insured to a great extent. The laminar structure of the side frames provides rigid side supporting structures which insure that the center axis of the stationary and moving cross beams of the press are maintained in alignment.

Summary of the invention This invention relates in general to the construction of extrusion presses and, in particular, to a new and useful hydraulic metal extrusion press construction with longitudinal side girders made up of a plurality of individual plate elements having a central cut out area for the accessibility of the parts and being supported separately from the movable parts of the press.

Prior to the present invention, extrusion presses or tube presses have been known as column or frame presses. The column or frames are so dimensioned that they are capable of absorbing the entire pressure force exerted between the two cross beams which act as a tensile force. Both the column type and the frame type construction have a disadvantage in that they are very heavy. The columns must be machined and are provided at both ends with threads for the tightening nuts. The securing of these heavy tension columns requires very heavy lugs. The

8 3,3503% Patented Nov. 7, 1967 column construction is not completely resistant to bending in axial directions, so that a special rigid supporting construction is usually required for the guideways, which is independent of the columns and on which the moving cross head and the receiver are displaceable. This results in additional weight. This type of construction is very expensive because of the great weight and high machining costs. When a frame construction is employed, it is also very expensive because of the extremely great weight of the press frame and is therefore only used in extrusion presses up to certain sizes. In the known hydraulic extrusion and tube presses, the cross beams are combined with the foot guiding longitudinal frame connecting them, to form a box-like construction. The longitudinal frames are arranged laterally of the vertical longitudinal plane of the press and symmetrically in respect thereto at a distance from the bottom or ground to provide a wide wall girder with a vertical main plane. Wide walled girders have a high resistance moment and are therefore practically resistant to bending, but such constructions are costly and result in relatively great overall weight. A further disadvantage is that they do not provide a free lateral access to the parts and to the necessary auxiliary devices provided, for example, for the introduction of blocks, the exchange of dies and the separation of the extrusion.

In accordance with the present invention, there is provided a construction which is both inexpensive and practical, and provides a frame which permits ready access for the various accessory devices. In accordance with the invention, there are provided side frame elements which are formed of a plurality of sheet metal plates which are cut away centrally to define windows or access areas of a sufficient length such that the cross beams forming the overall frame may rest at each end preferably on protruding lugs carried on the side frames which project into recesses defined on the cross beams. The side frames are supported separately from additional guiding means for the moving parts of the press. Byproviding the plate frames, which are merely stressed for tension with window-like recesses, the construction costs are extremely low and the lateral accessibility of the press is insured to a great extent.

In accordance with the inventive principles, for example, in sheet bending and heating plate presses and certain types of drop forge presses, the press frame can be made of a plurality of sheet metal elements or packs. Although the frames formed of a plurality of thin sheet metal elements are not resistant to bending in the transverse plane, this is not a disadvantage because an exact guidance of the moving parts is not so import-ant as a rule. However, in extrusion presses, and particularly presses for tools, which are equipped with a press mandrel, it is absolutely essential that the center axis of the stationary and moving cross beams of the press 'be maintained. This should be insured even under the action of heat in the range of the cross beams, and this may be accomplished with the construction of the present invention.

According to the invention, considerable savings in weight and costs are achieved by making the press frame of the two frame parts formed of sheet metal packs which are arranged at both sides of the cross beams. The invention makes use of the discovery that sheet metal packs of the type referred to, when stressed for tension offers with the same cross section more security against tearing than does a solid girder. Any disadvantage of the side frame in respect to resistance against bending stresses in the transverse planes is eliminated by the fact that the guideway for the axially moving parts, such as the receiver and the moving cross head of the press, is kept free from any adverse effects by an arrangement in which these parts are separately supported directly on the foundation.

According to one feature of the invention, the stationary cross beams are held with respect to the press frames, which are made of a plurality of individual plate elements, by means of adaptors arranged at both sides of the cross frames which engage in corresponding grooves defined in the side beams. This provides means for making certain that the die support will not be displaced even during heating of the cross beams.

According to another important embodiment of the invention, the side frames which are made of a plurality of plate elements, are spaced apart from the cross frames by means of spacer elements and screws to allow for any expansion due to heating. This arrangement is particularly suitable for presses for widening heated metal blocks. In such cases, there is a possibility that inaccuracies will occur in both axial directions, due to the heat expansion of the counter beam. With the inventive construction, the counter beam can thus expand in each direction without its center axis being displaced.

Accordingly, it is an object of this invention to provide an improved hydraulic press construction.

A further object of the invention is to provide an extrusion press having side frames which are made up of a plurality of plate elements with cut out central areas providing easy access to the moving and stationary extrusion parts and with means for independently supporting the frame elements and for guiding the moving parts of the press separately on the ground or a foundation.

A further object of the invention is to provide an extrusion press with side frame elements, comprising a plurality of plate members which are secured together and which are connected with cross beam members by means of a sliding groove and recess connection which permits longitudinal movement, and with spacers interposed between the longitudinal frame elements and the cross frame elements permitting movement in transverse planes between the various parts.

A further object of the invention is to provide an extrusion press construction which is simple in design, rugged in construction and economical to manufacture.

The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this specification. For a better understanding of the invention, its operating advantages and specific objects attained by its use, reference should be had to the accompanying drawings and descriptive matter in which there are illustrated and described preferred embodiments of the invention.

In the drawings:

FIG. 1 is a side elevational view of a metal extrusion press constructed in accordance with the invention;

FIG. 2 is a section taken on the line 2, 2 of FIG. 1;

FIG. 3 is a section taken on the

line

3, 3 of FIG. 1;

FIG. 4 is a section similar to FIG. 3, but indicating the portion in the area designated X of FIG. 3 in an enlarged detailed view;

FIG. 5 is a view similar to FIG. 1 of another embodiment of the invention;

FIG. 6 is a section taken on the line 6, 6 of FIG. 5;

FIG. 7 is a section taken on the line 7, 7 of FIG. 5; and

FIG. 8 is an enlarged detail of a portion of the section indicated in FIG. 7 by the location Y.

Referring to the drawings and in particular to the embodiment indicated in FIGS. 1-4, the invention embodied therein comprises an extrusion press which, in accordance with the invention, is provided with longitudinal or side frame members generally designated 1 which are made up of a plurality of individual sheet metal elements or packs which in the embodiment illustrated comprises two plates 1a and 1b (FIG. 4). The plates 1a and 1b are held together or braced by means of screw joint elements or bolts 4 which are arranged on both sides of stationary cross beams which include a cylinder beam 2 (FIG. 1) and a counter beam 3 (FIG. 3).

The frame plates and packs generally designated 1 are provided with openings or cut out portions located substantially centrally and elongated in a longitudinal direction. The stationary cross beam 2 includes a laterally projecting lug portion 2a and the cross beam 3 includes a laterally projecting lug portion 3a which extend outwardly through the openings defined in each of the side plate frames 1. In the embodiment illustrated, the opening is formed with reduced ends terminating in vertical edges 1d, 1:! against which the lug areas 2a and 3a, respectively, abut.

In accordance with a feature of the invention the longitudinal plates 1 and the cross members or cross beams 2 and 3 interengage by means of a projecting lug and recess formation which in the embodiment illustrated comprises elements forming an adapter or projecting lug 5 and 6 on the frame 1 which is adapted to ride in a recess or groove which is defined along the longitudinal length of the cross beam members 2 and 3.

The side frame elements 1 are supported at each end by means of brackets 8 which are carried on transverse foundation frame elements 9a and 9b, respectively, the latter being in a recess defined in a base formation 10. In one arrangement the bracket 8 on the support 9a is ecured against both longitudinal and transverse movement by a key member or holding lug 16 and by end portions of the frame 911, respectively. At the opposite end the bracket 8 is held against transverse movement but is free to move longitudinally.

In FIG. 2 it is seen how the piston rod 17 for relative sliding movement of the parts is mounted on the top and bottom ends of the receiver 13. The receiver carries a separating device 18 for separating the extrusion as well as a device 19 for exchanging the dies.

In accordance with a further feature of the invention longitudinally extending beams 11 are mounted in the foundation recess and support guide ways 12 which form divergently outwardly sloping surfaces upon which similarly formed surfaces 15 of the receiver 13 and crosshead 14 are slidable. The construction provides a separate and independent support for the sliding movement of the receiver 13 as well as the cross head 14 of the mandrel of the press without in any way interfering with the support for the side frames 1. The construction permits unhindered operation of the moving press parts without being affected by any expansion or contraction of the side plate elements by changes in temperature. By providing for the longitudinal movement of the frame particularly on the end having the receiver 13 which is subjected to unavoidable heating an unhindered longitudinal expansion may take place.

A further important inventive feature of the construction is that the longitudinal side frames are joined together by the cross beams 2 and 3 in order to form a boxlike construction. Each side frame is provided with the longitudinally extending window or cutout and they are advantageously made up of a plurality of separate plate openings terminating on each end with the substantially straight or vertical wall 1d which bears against an operative part of the press such as the adapter 2a of the movable cross head part at one end and the adapter 3a of the receiver at the opposite end. The cross head parts are separately supported in the foundation so that when pressure is applied to operate the press, the force of the movable cross head acting on the workpiece will be distributed outwardly to the side frame members through the walls 1d, 1d. This results in a pure traction force acting on all of the sheet *metal plates of the side frames 1.

In the preferred construction, several plates make up each side frame in the form of a plate laminar structure so that the traction forces will be transmitted individually in a closed system to the supporting side frames.

In addition because the movable parts and the frame are supported separately there will be no transposition.

of the parts due to any variations in the position of the frame including the intermediate portions 10, 1c.

In the embodiment illustrated in FIGS. 5-8, similar parts are similarly designated but are referred to with a prime indication thereafter. In this embodiment, instead of using separate frames 9a and 911 for supporting the plates 1', a single longitudinally elongated girder 9c is mounted in the foundation recess of the foundation 10. Brackets 8 and 8a are provided at the respective ends of the press frame 1. The bracket 8' compares to the bracket 8 in the other embodiment, whereas the bracket 8a includes an elevated bearing block portion 9d which extends up to the level of the center of the press axis and is arranged on the board side of each of the plates 1 to support the press frame. This insures the permanent maintenance of the center of the die even if the counter beam 3' expands under the action of heat.

In FIG. 8 spacers 20 are provided for insuring a spacing between the counter beam or cross beam 3' and the plate assembly 1. This permits expansion of the counter beam 3 in a transverse direction.

On the base frame 9c is also supported a supporting construction 11 for guide ways 12 which support the receiving part or moving cross beam element 13 and moving element 14' independently of the frames 1', 1 and insure the exact alignment of these elements.

Thus the design according to the invention insures, independent of any heating of the counter beam and the resultant expansion in longitudinal directions as well as transverse directions, a permanent alignment of the center axes of the die holders and the moving press parts. This makes it possible to use in an extrusion press, a press frame formed of sheet metal packs without the usual disadvantages of a low lateral stability of such a frame. Due to the elimination of the heavy tension columns and the better design of the stationary cross beams, the Weight of such a press can be considerably reduced. Instead of the big lugs for the columns, only small laterally protruding lugs are provided on the stationary cross beams by means of which the cylinder and the counter beam bear against the end faces of the frames on both sides. In this manner, merely tensile forces are transmitted to the frame base.

While specific embodiment of the invention have been shown and described in detail to illustrate the application of the inventive principles, it will be understood that the invention may be embodied otherwise without departing from such principles.

What is claimed is:

1. A hydraulic extrusion press comprising first and second laterally spaced longitudinal-1y elongated side frame members, each of said side frame members comprising a plurality of plate members, means for securing said plate members together, said frame members having an openin-g defined in the vicinity of the central portion thereof, a plurality of cross members extending between said side frame members, said side frame members having projecting adapters which project into corresponding recesses formed on said cross plate members for supporting said cross plate members in a manner permitting movement thereof, a foundation, bracket means for mounting said side plate members on said foundation, said press including a receiver and a moving cross head carried by said cross members, and guide means mounted on said foundation independently of said bracket means for separately guiding said extrusion press receiver and said moving cross head for relative movement thereof.

2. A hydraulic extrusion press comprising first and second laterally spaced longitudinally elongated side frame members, each frame member comprising a plurality of plate members, means for securing said plate members together, said frame members having an opening defined in the vicinity of the central portion thereof, a plurality of cross members extending between said side frame members, said side frame members having projecting adapters which project into corresponding recesses formed on said cross members for supporting said cross members in a manner permitting movement thereof, a foundation, bracket means for mounting said side frame members on said foundation, said press including a receiver carried by at least one of said cross members and a moving cross head carried by another of said cross members, and guide means mounted on said foundation independently of said bracket means for separately guiding said extrusion press receiver and said moving cross head for relative movement thereof, said receiver and said moving cross head each including lateral projections which extend through the opening of said cross frame.

3. A hydraulic extrusion press comprising first and second laterally spaced longitudinally elongated side frame members, each frame member comprising a plurality of plate members, means for securing said plate members together, said frame members having an opening defined in the vicinity of the central portion thereof, a plurality of cross members extending between said side frame members, said side frame members having projecting adapters which project into corresponding recesses formed on said cross plate members for supporting said cross plate members in a manner permitting movement thereof, a foundation, bracket means for mounting said side frame members on said foundation, said press including a receiver carried by at least one of said cross members and a moving cross head carried by another of said cross members, and guide means mounted on said foundation independently of said bracket means for separately guiding said extrusion press receiver and said moving cross head for relative move: ment thereof, said bracket means including a first bracket connected to one end of each of said side frame members and a second bracket connected to the opposite end of each of said side frame members, at least one of said first and second brackets being connected in a manner permitting longitudinal movement of said plates.

4. A hydraulic extrusion press comprising first andsecond laterally spaced longitudinally elongated frame members, each frame member comprising an plurality of plate members, means for securing said plate members together, said frame members having an opening; defined in the vicinity of the central portion thereof, a plurality of cross members extending between said side frame members, said side frame members having projecting adapters which project into corresponding recesses formed on said cross plate members for supporting said cross plate members in a manner permitting movement thereof, a foundation, bracket means for mounting said side frame members on said foundation, said press including a receiver carried by at least one of said cross members and a moving cross head carried by another of said cross members, and guide means mounted on said foundation independently of said bracket means for separately guiding said extrusion press receiver and said moving cross head for relative movement thereof, said bracket means including a first bracket connected to one end of each of said'side frame members and a second bracket connected to the opposite end of each of said side frame members, at least one of said first and second brackets being connected in a manner permitting longitudinal movement of said side frame members, at least one of said first and second brackets also being of a height extending upwardly in contact with the associated side frame members to at least the level of the axis of said extrusion press.

5. A hydraulic extrusion press comprising first and second laterally spaced longitudinally elongated frame members, each frame member comprising a plurality of plate members, means for securing said plate members together, said frame members having an opening defined in the vicinity of the central portion thereof, a plurality of cross members extending between said side frame members, said side frame members having projecting adapters which project into corresponding recesses formed on said cross plate members for supporting said cross members in a manner permitting movement thereof, a foundation, bracket means for mounting said side plates on said foundation, said press including a receiver carried by at least one of said cross members and a moving cross head carried by another of said cross members, guide means mounted on said foundation independently of said bracket means for separately guiding said extrusion press receiver and said moving cross head for relative movement thereof, said side frame members having an adapter comprising elements secured thereto and forming a projecting lug, said cross members having a longitudinally extending recess defined therein for receiving the projecting lug for permitting sliding movement of said cross plate and said side plates in respect to each other, and means for spacing said cross plate and said side frame members to permit transverse movement of one in respect to the other.

6. A hydraulic extrusion press comprising first and second laterally spaced longitudinally elongated frame members, each frame member comprising a plurality of plate members, means for securing said plate members together, said frame members having an opening defined in the vicinity of the central portion thereof, a plurality of cross members extending between said side plates, said side plates having projecting adapters which project into corresponding recesses formed on said cross plate members for supporting said cross plate members in a manner permitting movement thereof, a foundation, bracket means for mounting said side plates on said foundation, said press including a receiver carried by at least one of said cross members and a moving cross head carried by another of said cross members, and guide means mounted on said foundation independently of said bracket means for separately guiding said extrusion press receiver and said moving cross head for relative movement thereof, wherein said bracket means are supported on the foundation by a common base frame, said guide ways being mounted on said base frame.

7. A hydraulic extrusion press comprising first and second laterally spaced longitudinally elongated frame members, each frame member comprising a plurality of plate members, means for securing said plate members together, said frame members having an opening defined in the vicinity of the central portion thereof, a plurality of cross members extending between said side plates, said side plates having projecting adapters which project into corresponding recesses formed on said cross plate members for supporting said cross plate members in a manner permitting movement thereof, a foundation, bracket means for mounting said side plates on said foundation, said press including a receiver carried by at least one of said cross members and a moving cross head carried by another of said cross members, and guide means mounted on said foundation independently of said bracket means for separately guiding said extrusion press receiver and said moving cross head for relative movement thereof, said guide ways having guide faces formed by oblique surfaces extending outwardly from each side.

8. An extrusion press construction comprising a pair of spaced substantially parallel longitudinal side frames each having a longitudinally elongated opening, means mounting said side frames in spaced relationship to form a box-like structure; and press parts between said side frames including: a press receiver adjacent one end of said spaced side frames leaving an adapter portion bearing outwardly against the ends of the openings of said side frames and a cross head having an adapter portion bearing against the opposite ends of the openings of said side frames and a movable portion movable toward said receiver portion, said receiver and said cross head bearing in opposite outward directions against said side frames to place said side frames substantially in traction during operation of said press.

9. An extrusion press construction comprising a pair of spaced substantially parallel longitudinal side frames each having a longitudinally elongated opening and each comprising a plurality of separate plate elements, means mounting said side frames in spaced relationship including a plurality of cross beam elements disposed between said side frames and forming a box-like structure therewith, press parts between said side frames including: a press receiver adjacent one end of said side frames having an adapter portion bearing outwardly against said side frames adjacent the one end of the openings thereof and a moving cross head having an adapter portion bearing outwardly against the side frames adjacent the opposite ends of the openings thereof; and means for holding said cross beam elements to said side frames including a laterally protruding lug formation on one engageable in the longitudinally extending recess defined on the other of said cross beam elements and said side frames.

10. An extrusion press construction comprising a pair of spaced substantially parallel longitudinal side frames each having a longitudinally elongated opening and each comprising a plurality of separate plate elements, spaced baskets mounting said side frames in spaced relationship permitting longitudinal expansive movement of said side frames, press parts between said side frames including a press receiver adjacent one end of said side frames including an adapter portion bearing outwardly against said side frames adjacent the one end of the openings thereof and a moving cross head having an adapter portion bearing outwardly against the side frames adjacent the opposite ends of the openings thereof, and means for holding said cross beam elements to said side frames including a laterally protruding lug formation on one engageable in the longitudinally extending recess defined on the other of said cross beam elements and said side frames.

11. An extrusion press construction comprising a pair of spaced substantially parallel longitudinal side frames each having a longitudinally elongated opening and each comprising a plurality of separate plate elements, means mounting said side frames in spaced relationship, press parts between said side frames including a press receiver adjacent one end of said side frames including an adapter portion bearing outwardly against said side frames adjacent the one end of the openings thereof and a moving cross head having an adapter portion bearing outwardly against the side frames adjacent the opposite ends of the openings thereof, and means forming longitudinally extending guides for said press parts for supporting said press parts independently of said side frames.

References Cited UNITED STATES PATENTS 1/1934 Lingren -s 83--701 7/ 1958 Munschauer 52690

Claims

1. A HYDRAULIC EXTRUSION PRESS COMPRISING FIRST AND SECOND LATERALLY SPACED LONGITUDINALLY ELONGATED SIDE FRAME MEMBERS, EACH OF SAID SIDE FRAME MEMBERS COMPRISING A PLURALITY OF PLATE MEMBERS, MEANS FOR SECURING SAID PLATE MEMBERS TOGETHER, SAID FRAME MEMBERS HAVING AN OPENING DEFINED IN THE VICINITY OF THE CENTRAL PORTION THEREOF, A PLURALITY OF CROSS MEMBERS EXTENDING BETWEEN SAID SIDE FRAME MEMBERS, SAID SIDE FRAME MEMBERS HAVING PROJECTING ADAPTERS WHICH PROJECT INTO CORRESPONDING RECESSES FORMED ON SAID CROSS PLATE MEMBERS FOR SUPPORTING SAID CROSS PLATE MEMBERS IN A MANNER PERMITTING MOVEMENT THEREOF, A FOUNDATION, BRACKET MEANS FOR MOUNTING SAID SIDE PLATE MEMBERS ON SAID FOUNDATION, SAID PRESS INCLUDING A RECEIVER AND A MOVING CROSS HEAD CARRIED BY SAID CROSS MEMBERS, AND GUIDE MEANS MOUNTED ON SAID FOUNDATION INDEPENDENTLY OF SAID BRACKET MEANS FOR SEPARATELY GUIDING SAID EXTRUSION PRESS RECEIVER AND SAID MOVING CROSS HEAD FOR RELATIVE MOVEMENT THEREOF.