EP0802837A1

EP0802837A1 - Horizontal metal bar extrusion press

Info

Publication number: EP0802837A1
Application number: EP96900249A
Authority: EP
Inventors: Michael Howe
Original assignee: SMS Eumuco GmbH; SMS Schloemann GmbH
Current assignee: SMS Group GmbH
Priority date: 1995-01-11
Filing date: 1996-01-04
Publication date: 1997-10-29
Anticipated expiration: 2016-01-04
Also published as: DE19500555C1; KR100360933B1; JP2865879B2; ES2135864T3; EP0802837B1; DE59601999D1; US5855135A; WO1996021527A1; KR19980701325A; JPH10510475A; ATE180426T1

Abstract

PCT No. PCT/DE96/00008 Sec. 371 Date Aug. 29, 1997 Sec. 102(e) Date Aug. 29, 1997 PCT Filed Jan. 4, 1996 PCT Pub. No. WO96/21527 PCT Pub. Date Jul. 18, 1996A horizontal metal extrusion press has a pair of relatively stationary end plates spaced apart relative to a press axis and a plurality of spaced parallel tie rods extending parallel to the axis between the end plates, fixing same axially together, and each formed with a support face extending parallel to the axis and lying in a plane forming an acute angle with the horizontal and vertical and generally including the axis. A movable plate is displaceable axially between the end plates and carries a ram. A holder support is carried on one of the end plates and a cylinder carried on one of the end plates and braced against the movable plate for axially displacing same. Respective prismatic-section base bars on the support faces of the tie rods each have a generally vertical guide face and a generally horizontal guide face. These base bars are secured on the respective tie rods for limited movement radially of the axis. Respective vertical adjusters are braced between each of the horizontal guide faces and the movable plate and respective horizontal adjusters independent of the vertical adjusters are braced between each of the vertical guide faces and the movable plate.

Description

Horizontal metal extrusion press

Horizontal metal extrusion presses are preferably provided with a press frame, which is usually formed from a cylinder spar, a counter spar and connects them, and has four tie rods. The design of the tie rods as guides for the pick-up holder and the running hole, which can be displaced in the press frame along the press axis (DE-PS 23 66 117), is essential for low structural expenditure. This direct guidance on the tie rods saves a base frame designed as a guide frame (DE-PS 64 174, DE-OS 2 003 244).

The support of the holder and also of the barrel is often supported on support surfaces which are arranged at an angle so that they extend the press axis in their extension or run close to the press axis, i.e. are oriented towards the press axis, so that the central position of the receiver and the press ram to have been unaffected by thermal expansion due to changes in temperature. For the central alignment of the transducer and the press ram on the press axis, supports are arranged in the base frame supporting the guides for the transducer holder and the spar between the guides and the base frame, which are horizontally adjustable on the base frame transversely to the press axis and against which the guides are vertically adjustable (DE-PS 644 174).

With the saving of the base frame designed as a guide frame and the design of the tie rods as guides for the transducer holder and the spar, the supports had to be omitted and the actuators were arranged perpendicular to the support surfaces oriented on the press axis in the transducer holder and in the spar, as is the case with one guided by the press frame pick-up holder from DE-OS 14 52 264, as well as in the extrusions provided with a base frame designed as a guide frame from the

ERSÄΓZB AΓT (RULE 26) DE-OS 20 03 244 is known. This arrangement of the actuators perpendicular to the support surfaces oriented on the press axis has the disadvantage that the adjustment always has an effect in a vertical and a horizontal component, the compensation of which compensates for an offset of the sliding shoes of the actuators resting on the support surfaces transverse to the direction of movement of the sensor holder and Laufholm ordered. The actuators are actuated primarily when setting up the extrusion press when the transducer holder and the spar are at rest, whereby due to the friction between sliding shoes and support surfaces, the offset does not take place or only incompletely and only takes place when the transducer or the spool is moved, which means that setting up the extrusion press difficult

If the extrusion press is set up only when it is at operating temperature, there are no later temperature changes and thus the thermal expansions, for the compensation of which the arrangement of the support surfaces for the transducer holder and the spar, which is oriented to the press axis, has been made. However, this arrangement must be maintained. The press frame formed from the cylinder spar, counter spar and tie rods connecting them is subject to an overall elastic deformation in such a way that the cylinder spar and counter spar bulge outwards and thus the tie rods experience an inward curvature, which minimizes due to the high dimensional rigidity of the cylinder spar and counter spar, but cannot be excluded. If, therefore, in saving a base frame designed as a guide frame, the sensor holder and the running bar are guided through the tie rods, the arrangement of the support surfaces on the tie rods oriented towards the press axis must be provided.

The invention is based on metal extrusion presses of the latter type, corresponding to the preamble of claim 1, and it is based on the object of improving and facilitating the adjustability of the pick-up holder and the spar to the tie rods leading them. This object is achieved by the design of the extrusion press with the characterizing features of claim 1.

REPLACEMENT PLATE {RFGE.L 26) The length of the base strips can be dimensioned such that they cover the entire area of the tie rods covered by the receiving holder and the walking beam when they are displaced along the press axis, the actuating means then being provided with sliding shoes on the horizontal and vertical active surfaces of the base strips fit and slide along it.

However, the base strips can also be short, for example dimensioned according to the bracket width, designed as sliding shoes and coupled to their bracket and their horizontal and vertical adjusting means for displacement with the pick-up holder or runner along the press axis.

From the primary point of view to render the inward curvature of the tie rods connected with the elastic deformation of the press frame ineffective by arranging the support surfaces on the tie rods oriented on the press axis, it is of particular advantage if, according to a further feature of the invention, the support surfaces are attached the tie rods are parallel to the plane defined by the press axis and the tie rod center axes.

An embodiment is shown in the drawing figures 1 to 6. It shows the

Figure 1 is an overall view of the extruder in side view. The shows on a larger scale

Fugur 2 a cross section along the section line II-II entered in Figure 1, and the

3 shows a cross section along the section line III-III entered in Figure 1. In a further enlargement, the

Figure 4 shows a section IV of Figures 2 and 3 and the

ERSÄΓZBLÄΓT (RULE 26) Figure 5 shows a section V from Figure 2. Die

FIG. 6 shows a detail in a section VI from FIG. 1 on a larger scale.

A modification of the exemplary embodiment is in

FIG. 7 is shown, which shows a section in a section in a section line VII-VII entered in FIG.

A modified design of the actuating means and their connection with the brackets of the transducer holder and the spar is in

Figure 8 is shown in a section corresponding to the embodiment shown in Figure 4.

Further modifications of the exemplary embodiment are in the

Figures 9 to 11 shown, the representations corresponding to a section of Figure 3.

The metal extrusion press shown as an exemplary embodiment in FIGS. 1 to 6 consists of a cylinder spar 1, a counter spar 2 and tie rods 4 connecting them to the press frame 3. The tie rods 4 are designed as shrink anchors and are composed of tension slats 5 which, with hammer heads 6, the spars (cylinder spar 1 and counter spar 2) overlap, and from composite square pressure columns 7, which are arranged between the spars. The square pressure columns 7 are hollow. When assembling the press frame 3, the tension slats 5 are biased against the square pressure columns 7. This design known from DE 23 31 318 C3 gives the press frame a particularly high dimensional stability.

Connected to the cylinder spar 1 is a cylinder 8 in which a piston connected to a spar 9 can be acted upon for the pressing process, the spar 9 engaging with one on it

REPLACEMENT SHEET (RULE 26) attached press ram 10 moves in the direction of the press axis XX. Retractions 11 are provided for the retrospective movement of the walking bar 9. A pick-up holder 12 of a pick-up 13 for metal blocks to be pressed is also movable in the direction of the press axis XX. The Aufnehmerhal he 12 is moved by piston-cylinder units 14. During their movement in the direction of the press axis XX, the runner 9 and the transducer holder 12 are guided by the tie rods 4 from the square pressure columns 7 surrounding the tie bars 5, at least the lower ones of which Guide strips 15 are provided to support the runner 9 and the pick-up holder 12, but also the upper ones can be provided with guide strips 16 - as in the exemplary embodiment - in order to hold down the pick-up holder 12 and possibly also the runner 9.

The pickup holder 12 is provided with brackets 17 and the running beam 9 is provided with brackets 18 which form brackets or, as in the exemplary embodiment, are connected to brackets 19. The brackets 19 are provided with vertical adjusting means 20 and horizontal adjusting means 21 with which they comprise prismatic base strips 22 which rest on the support surfaces 15a of the guide strips 15 oriented on the press axis.

A vertical adjusting means 20, a horizontal adjusting means 21 and a base bar 22 encompassed by them are shown in detail in FIG. 4 with their horizontal effective area 22h, their vertical effective area 22v and their diagonal effective area 22d.

The vertical adjusting means 20 consists of a threaded bolt 23, which is screwed into a threaded bore 24 in the bracket 19 and is provided with wrench flats 25. The threaded bolt 23 can be locked in a vertical position by means of a lock nut 26. With its lower spherical end face 27, the threaded bolt 23 is supported by a pressure ring 28, a sliding block 29 and the base bar 22, on the horizontal working surface 22h of which the sliding block 29 rests and which with its diagonal active surface 22d rests on the supporting surface 15a of one of the tie rods 4 , on this off. Means an anchor bolt 30, which penetrates a bore in the threaded bolt 23 and is connected to the slide shoe 29 by its thread 31, the pressure ring 28 and the slide shoe 29 are held together with the threaded bolt 23 by the threaded nuts 32.

The horizontal adjusting means 21 consists of a threaded bolt 33 which is screwed into a threaded bore 34 in the bracket 19 and is provided with a key surface 35. The threaded bolt 33 can be locked in its horizontal position by means of a lock nut 36. The threaded bolt 33 acts on the vertical active surface 22v of the base strip 22 via a track shoe 39. Although direct support of the sliding shoe 39 on the threaded bolt 33 would be possible, the support is carried out according to the exemplary embodiment by means of a thrust washer 37 and a package of disc springs 38. One by one Thread 41 with anchor bolt 40 connected to slide shoe 39 holds slide shoe 39 in contact with threaded bolt 33, which is provided with a bore penetrated by anchor bolt 40. By means of the thread nuts 42, the plate springs 38 are preloaded to such an extent that the results from the vertical force (proportion by weight of the transducer holder with the transducer or the stringer) and the support of the base bar 22 on the inclined support surface 15a oriented towards the press axis are taken up as part of the preload becomes.

In the same way as in the exemplary embodiment according to FIG. 4, in the exemplary embodiment according to FIG. 8, a base strip 22 with a horizontal active surface 22h, a vertical active surface 22v and a diagonal active surface 22d is provided, the base strip 22 with its diagonal active surface 22d on the supporting surface 15a of the guide bar 15 and is supported by this on the pressure column 7 of the tie rod 4. A threaded bolt 73 is provided as the vertical adjusting means 70 and is screwed into a threaded bore 74 of a slide piece 69. The threaded bolt 73 can be locked in a vertical position by means of a lock nut 76. With its lower, spherical end face 77, the threaded bolt 73 is supported by a pressure ring 78 and a sliding block

ERSÄTZBLÄΓT RE 79 on the horizontal effective surface 22h of the base bar 22. By means of an anchor bolt 80 which penetrates a bore in the threaded bolt 73 and is connected to the slide shoe 79 by its thread 81, the pressure ring 78 and the slide shoe 79 are held together with the threaded bolt 73 by the threaded nuts 82. The arms 17 of the transducer holder 12 or arms 18 of the runner 9 provided with slide strips 75 are each supported on a slide piece 69 and via the threaded bolt 73, the pressure ring 78 and the slide shoe 79 on the base strip 22 and are vertical over the threaded bolt 73 Adjustable position. The slide piece 69 is provided with a vertical extension 69a, which is provided with a slide piece 69b, with which the slide piece 69 rests on the vertical effective surface 22v of the base strip 22. For the horizontal alignment of the pick-up holder 12 or the running spar 9, adjusting means 71 are provided between a slide piece 69 and the pick-up holder 12 or running spar 9. Each adjusting means 71 consists of a threaded spindle1 83, the threaded portion 83a of which is screwed into a threaded bore 84 in the pick-up holder 12 or the spar 9, is adjustable in the latter and can be fixed by a lock nut 86.

Key surfaces 85 are provided for rotating the threaded spindle 83. The head piece 83b of the threaded spindle 83 acts on the slide piece 69 via a thrust washer 87 and a package of disc springs 88. The embodiment according to FIG. 8 has the advantage that the components for the horizontal adjustment of the pickup holder 12 or the spar 9 are less far beyond the Tie rods 4 protrude and are arranged more protected. This embodiment is particularly suitable for a motor-driven instead of a manual drive of the adjusting means 70 and 71.

FIG. 5 shows in detail a hold-down device 43 which slides along the upper guide bar 16 with the sensor holder 12. The hold-down devices 43 are mounted in brackets 44 fastened to the sensor holder 12. A hold-down device 43 consists of a threaded bolt 45 which is screwed into a threaded bore 46 in the bracket 44 and is provided with a key surface 47. The threaded bolt 45 is by means of a lock nut 48 noticeable. The threaded bolt 45 acts via a slide washer 49 and a package of disc springs 50 on a slide shoe 5, which is supported on the guide bar 16 and thus holds down the transducer holder 12 with the force tensioned in the disc springs 50. An anchor bolt 53 connected to the slide shoe 51 via the thread 52 passes through a bore in the threaded bolt 45 and holds the threaded bolt 45, the slide washer 49, the plate springs 50 and the slide shoe 51 together by means of the threaded nuts 54, the hold-down force being determined by the position of the threaded bolt 45 is adjustable in the console 44.

The schematic illustration in FIG. 6 shows a base strip 22 which extends over the entire area described by the pick-up holder 12 and by the spar 9. The base bar 22 is held - as can be seen from FIG. 4 - by screws 55, the heads 56 of which are countersunk in the base bar 22. The bores 57 and 58 are held by a dimension larger than the screws 55 and screw heads 56, so that the operational displacements of the pressure column 7 of the tie rod 4 and expansion differences between them remain within the scope of the game. In order to limit the displacement force, the screw heads 56 are supported by plate springs 59.

If, as mentioned, the extrusion press is set up only when it is at operating temperature, thermal expansions due to temperature changes can be disregarded and only the elastic deformations of the press frame 3 under the pressing force need to be taken into account. These have an effect only at a greater distance from the cylinder spar 1 and from the counter spar 2, that is to say particularly in the middle of the tie rods 4. Under this condition, it is possible to fix the base strips 22 in the vicinity of the cylinder spar and counter spar 2 transversely to the pressing direction, the fixing at one end - in the exemplary embodiment at the end near the counter spar 2 - by a fitting bolt 60 and at the other end by a feather key 61 with the expansion differences between base strips 22 and tie rods 4 compensating longitudinal play 62. In the end areas, such a leadership corresponds in their Behavior of a flat guide, otherwise that of an X guide.

In the modification shown in FIG. 7, base strips 63 are provided, the length of which is limited to the width B of the brackets 19. They slide on the guide bars 15 during the displacement of the pickup holder 12 or the running spar 9 and are therefore coupled to their bracket 19 in the displacement direction. For this purpose, in the exemplary embodiment, the slide shoe 29 and likewise the base strip 63 with a groove 64 running transversely to the direction of displacement on the slide shoe 29 and

65 provided on the base bar 63, in which the feather key

66 lies as a coupling (see also the dotted representation in FIG. 4).

The tie rods 4 in the exemplary embodiments according to FIGS. 1 to 8 are composed of tie bars 5 and square pressure pillars 7. This design is preferred because of its particular dimensional stability, but the invention is not tied to this, as is shown in FIGS. 9 to 11 . In the frame design shown in FIG. 9, round tie rods 63 are prestressed against tubular pressure columns 64 arranged between cylinder spar 1 and counter spar 2. On a longitudinal reinforcement 65, these are provided with the support surface 15a oriented on the press axis. In the exemplary embodiments according to FIGS. 10 and 11, simple, non-prestressed circular columns are provided as tie rods, the circular column 66 in FIG. 10 being provided with a strip 67 and this with the support surface 15a, while the circular column 68 in FIG. 11 is provided with one Support surface 15a forming flattening is provided.

The vertical adjusting means 20 and 70 and the horizontal adjusting means 21 and 71 as well as the hold-down device 43 according to the exemplary embodiments are provided for manual adjustment. In connection with measuring devices known per se - for example from DE 30 20 156 AI, EP 0 379 937 B1 or EP 0 589 240 AI - for checking the central alignment of the press components and in connection with motorized drives for the adjusting means 20 or 70 and 21 respectively. 71 so hold-down their setting can also be carried out automatically via a control computer evaluating the measured values.

REPLACEMENT BLAπ (RULE 26)

Claims

Patent claims:

1. Lying metal extrusion press, which consists of a cylinder spar (1) and a counter spar

(2) and these connecting tie rods (4) formed a press frame (3), a receiver holder (12) and a running bar carrying a press ram (10), guided by the tie rods (4), can be moved along the press axis (X-X), the with Tie rods (4) provided with support surfaces (15a) oriented towards the press axis (X-X) support and guide the pickup holder (12) and the running bar (9) via support means that can be adjusted in their support distance and are arranged between consoles of the pickup holder and the running bar and the support surfaces, that each of the support means comprises a vertical (22v), a horizontal (22h) and a diagonal (22d) prismatic base strip (22) which corresponds to the supporting surface (15a) of the associated tie rod (4), which is horizontal (21, 71) adjusting means (20, 21; 70, 71) of a console (19) or a slide piece (69) of the sensor holder (12) acting on the vertical active surface (22v) and vertically (20, 70) on the horizontal active surface (22h). ) or running bar (9) are assigned and the base bar (22) is movable radially to the press axis (X-X) on the support surface (15a) of the associated tie rod (4).

Metal extruder according to claim 1, g e k e n n z e i c h n e t d u r c h

Base strips (22), which extend along the lower tie rods (4) supporting the pickup holder (12) and the running bar (9) over the entire area covered by the pickup holder (12) and running bar (9), and the adjusting means (20 , 21; 70, 71) assigned to the horizontal (22h) and the vertical (22v) active surfaces of the base strips (22) sliding shoes (29, 39; 79, 69b).

3. Metal extruder according to claim 1, characterized in that the horizontal (21; 71) and vertical (20; 70) adjusting means of each console (19) are assigned a base strip (63) of console width as a sliding shoe and are used to move the pickup holder (12). and running bar (9) is coupled (66) along the press axis (X-X).

4. Metal extruder according to one of claims 1 to 3, so that the support surfaces (15a) on each tie rod (4) are located parallel to the plane defined by the press axis (X-X) and the tie rod center axis.

∞MBLAπ (RULE 26)