DE19818933B4 - Cross rolling machine - Google Patents

Abstract

Cross rolling machine with two parallel, juxtaposed and co-rotating, via gears (5, 5 ', 26, 26') driven rollers, which in their horizontal Distance to each other are adjustable by pivoting a pivotable bearing housing (28, 28 ') or two pivotable bearing housing (28, 28'), in which Walzwellen are stored, which carry the rollers, characterized in that the pivotable bearing housing (28, 28 ') for setting a nip not about a common axis to be pivoted, but by one, for each roller separate axis (31, 31 ') and the pivot axis (31, 31') for pivoting the swivel bearing housing (28, 28 ') substantially perpendicular below or vertically above the middle horizontal positions of the roller center axes (30, 30 ') lie.

Description

The The invention relates to a cross rolling machine according to the preamble of Patent claim 1.

On On the market are such machines, which are also Wedge Querwalz machines be known, known.

she are used to produce stepped, rotationally symmetrical long parts by hot or warm forging.

DE 43 01 314 and DE 44 16 238 show such machines. The parallel-mounted rollers are equipped with wedge and annular tools, which cause the said transformation.

The Rollers of these cross rolling machines are for faster roll change cantilevered but to achieve a higher Walzteilgenauigkeit provided with a removable outer bearing bar, which the elastic migration of the rollers through the radial greatly reduces or ensures the forming forces acting on the rollers that the remaining slight elastic migration the rolls are parallel.

Furthermore, from the DE 93 12 116 U1 a non-driven Tangentialkopf known in which two rollers are coupled via gears and the rollers are to be employed via two pivotable bearing housing.

From the DE 25 55 604 A1 is a cross rolling machine is known in which at least one roller is linearly deliverable.

Finally, out of the DE 2 329 270 A a roller drive for counter-rotating rollers, in which the rollers are driven and coupled via gears and the rollers are to be employed via pivotable bearing housings.

For the adjustment of the annular forming tools mounted on the rollers to each other, it is necessary to change the rollers in their horizontal distance from each other. This is done by means of two devices, one in the machine housing and one on the outer bearing bolt. The device in the machine housing is in the pictures 1 to 6 not shown. However, it is similar in function and in construction to that shown with the outer bearing latch.

This so-called roll gap adjustment moves the rolls with their roll shafts arcuately about the central axis of the central shaft ( 17 ). This movement arises because the pivotable bearing housings in the central axis ( 17 ) are stored.

On The rollers act not only the described radial but also tangential forming forces. These are in the described machine vertically and each roller directed in the opposite direction. Depending on the workpiece these forces are smaller or larger.

at larger vertical Forming forces and / or Especially wide rollers, it may be useful in the field of external bearing bolt also a vertical support to perform the rolling to increase the accuracy of the rolling part.

A such support must be such that the horizontal adjustability of the rollers, that means the roll gap setting is not hindered.

at The known rollers, the vertical support per roller is pivotable the central shaft axis is arranged so that it is together with the Outside bearing bars a functional triangle forms.

However, this concept has the disadvantage that the vertical bearing forces in the outer bearing bar around the lower support point on the central shaft axis ( 17 ) generate equidirectional moments, which lead to a spatial misalignment of the roll shafts and to a misalignment of the outer bearing bolt ( 6 ). These misalignments are made possible by the elastic rotation of the two pivotable bearing housing.

The Lead to misalignments to an altered one Position of the rollers to each other and thus to an increase in Roller part tolerances, So to a reduction in quality the rolled parts.

the The object of the invention is based on an improved Cross rolling machine of the type described show the described Disadvantages not.

Is solved This object is achieved by a cross rolling machine with the features according to claim 1.

By these arrangements become moments as described above from the vertical bearing forces avoided around these pivot axes, or reduced to such a small size, that the quality-reducing Impacts are minimal and negligible.

The described cross rolling machine conception with the nip setting by oppositely pivoting the, the roll shafts bearing bearing housing about the central axes ( 29 . 29 ' ) require ever a gear whose center lines is on the respective pivot axis, so that the drive of the rollers regardless of their horizontal position success can.

For the right one Sequence of the forming process at the contact points between cross rolling tool and rolled part, it is important that the respectively matching one another and mirror-image arranged tool parts on the rollers exactly opposite lie.

For the roll gap adjustment, this means that during the pivoting movement of the bearing housing ( 28 . 28 ' ) with the gear ( 26 . 26 ' ), the tool parts, which were before the adjustment on a common, horizontal center line of the two rollers, even after the adjustment still have to lie on this common center line.

This is achieved by using the gears ( 5 ) and ( 26 ), respectively. ( 5 ' ) and ( 26 ' ) same pitch circle diameter can be selected and one intermediate ( 27 . 27 ' ) is used to reverse the direction of rotation.

characters

1 Horizontal section through the rollers with roller shafts.

2 View C ( 1 ) of the known cross rolling machine conception.

3 Cut AB ( 1 ) of the known cross rolling machine conception.

4 View C ( 1 ) of the cross roll machine design according to the invention.

5 Cut AB ( 1 ) of the cross roll machine design according to the invention.

6 Schematic representation of the misalignment of the roller shafts and the outer bearing bolt.

1, 1'

Walzenwellen

2, 2'

Walzen

3, 3'

Walzwerkzeuge

4, 4'

Schwenkbare Lagergehäuse

5, 5'

Zahnräder auf den Walzenwellen

6

Maschinengehäuse

7

Antriebsmotor

8

Riementrieb

9

Externes Getriebe

10, 10'

Riegellager

11, 11'

Obere Vertikalstützenlager

12, 12'

Vertikalstützen

13

Riegel-Zugstange

14

Zahnrad auf der Zentralwelle

15, 15'

Zwischenräder

16, 16'

Schwenkbare Lagergehäuse

17

Mittelachse der Zentralwelle

18, 18'

Mittelachsen der Walzenwellen

19

Mittelachse des unteren Vertikalstützenlagers = Mittelachse Zentralwelle

20

Unteres Vertikalstutzenlager

21

Riegel-Walzspaltverstellung

Elements of the known cross rolling machine conception

1, 1 '

roller shafts

2, 2 '

roll

3, 3 '

Rolling tools

4, 4 '

Swiveling bearing housing

5, 5 '

Gears on the roller shafts

6

machine housing

7

drive motor

8th

belt drive

9

External gearbox

10, 10 '

lock bearing

11, 11 '

Upper vertical support bearing

12, 12 '

vertical supports

13

Tie drawbar

14

Gear on the central shaft

15, 15 '

idlers

16, 16 '

Swiveling bearing housing

17

Central axis of the central shaft

18, 18 '

Central axes of the roll shafts

19

Center axis of the lower vertical support bearing = central axis central shaft

20

Lower vertical nozzle bearing

21

Riegel nip adjustment

22, 22'

Riegellager

23, 23'

Obere Vertikalstützenlager

24, 24'

Vertikalstützen

25

Riegelzugstange

26, 26'

Zahnräder auf den Schwenkwellen

27, 27'

Zwischenräder

28, 28'

Schwenkbare Lagergehäuse

29, 29'

Mittelachsen der Schwenkwellen

30, 30'

Mittelachsen der Walzenwellen

31, 31'

Mittelachsen der unteren Vertikalstützen-Lager

32

Antriebszahnrad auf der Zentralwelle

33, 33'

Untere Vertikalstützen-Lager

34

Riegel-Walzspaltverstellung

Elements of the cross rolling machine design according to the invention

22, 22 '

lock bearing

23, 23 '

Upper vertical support bearing

24, 24 '

vertical supports

25

Riegelzugstange

26, 26 '

Gears on the pivot shafts

27, 27 '

idlers

28, 28 '

Swiveling bearing housing

29, 29 '

Central axes of the pivot shafts

30, 30 '

Central axes of the roll shafts

31, 31 '

Central axes of the lower vertical support bearings

32

Drive gear on the central shaft

33, 33 '

Lower vertical column bearings

34

Riegel nip adjustment

Claims (2)

Cross rolling machine with two parallel, juxtaposed and co-rotating, via gears ( 5 . 5 ' . 26 . 26 ' ) driven rollers, which are adjustable in their horizontal distance from one another by pivoting a pivotable bearing housing ( 28 . 28 ' ) or two swiveling bearing housings ( 28 . 28 ' ), in which Walzwellen are supported, which carry the rollers, characterized in that the pivotable bearing housing ( 28 . 28 ' ) are not to be pivoted about a common axis to set a roll gap, but by one, for each roller separate axis ( 31 . 31 ' ) and the pivot axis axes ( 31 . 31 ' ) for pivoting the pivotable bearing housings ( 28 . 28 ' ) substantially perpendicularly below or perpendicularly above the central horizontal positions of the roller central axes ( 30 . 30 ' ) lie. Cross rolling machine according to claim 1, characterized in that the gears on the roll shafts ( 5 . 5 ' ) and the gears on the pivot shafts ( 26 . 26 ' ) have the same pitch circle diameter and between these ever a Zwischenrad ( 27 . 27 ' ) is arranged.