DE1932184A1 - Intermediate chucks for pipe cold rolling mills - Google Patents

Description

Pa lack violence

ZELiENTiN υ. LUYKEN
8000 Munich 22

Zweibrückenstrasse 4th

Elekstrostalskij zavod tjazelogo 25 «. June 1969

masinostrοgenija

Elektrostal / USSR - P 23 642

ZWISGHENSPAiiFJFUTTER FOE EOHEKALTWAIiZlBRIiE

The invention relates to tube cold rolling mills and more particularly on a perfecting of the intermediate chuck for these works.

During the rolling process, the itohling should move towards the Work rolls too moved into the metal deformation zone and also around its axis can be rotated. The blank can only then be fed and be rotated if the V »· salt do not touch the metal to be rolled! i.e. this can only happen at the moment when the caliber? "- * ' column are open. The latter are opened when the roll stand is in the front and rear positions. The intermediate chuck lets the blank pass and turns him. if, on the other hand, the scaffolding is in the outermost front Position, the blank is only rotated.

It is a known, intermediate chuck for tube cold rolling mills. ein.Gehäuse with a hollow spindle arranged in it, in which Slits the clamping jaws are accommodated, which encompass the blank (see for example the textbook by M.I. Grinspun et al. "Rohrkaltwalzwerke", S.222 ... 224, Verlag "Maschinostroenie" (mechanical engineering) . Moscow, 1967). -

When rolling pipes made of difficult to deform metals on cold rolling mills, the blank is preheated directly on the rolling train to 6CX) ⁰ C (rolling in the heated state). In this case, the well-known intermediate chuck is removed and switched on

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a heating inductor is installed in its place. In these rolling mills (without double chucks) the pipes cannot be doubled Rotation of the blank be rolled, because at the moment in which the blank is rotated, he is not yet the Rolling mandrel wraps around, slips through and is then twisted · As a result the quality of the rolled tubes is lower and it is 1st impossible to produce thin-walled pipes.

It is. the '"object of the present invention, the one mentioned To eliminate disadvantage.

The invention is based on the object of such To create intermediate chucks that allow pipes in the heated state in rolling mills with reciprocating To roll the stand and rotate the pipe blank twice "

This task is accomplished by using an intermediate chuck solved for tube cold rolling mills, which has a housing with a hollow spindle arranged in it, in whose slots clamping jaws are housed, which include the blank, wherein the intermediate chuck according to the invention with a heating inductor is equipped, which does not prevent the passage of the pipe.

In a preferred design, the intermediate chuck has a flange on the front of its housing, on which the cantilever arm with centering holes for mounting the Heating inductor is attached.

Such a structural design of the intermediate chuck allows the rolling of pipes in the heated state with double rotation of the blank in tube cold rolling mills,

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whereby, it is possible to roll thin-walled tubes and the Increase the quality of the finished tube.

In the following, the invention is illustrated by describing a Embodiment of the same and explained by drawings; it shows

Fig. 1 is a longitudinal section of the intermediate clamping f according to the invention ucters and '

FIG. 2 the section II-II of FIG. 1.

The intermediate chuck (Fig. 1) has housing 1, which Has flange 2 with recesses 3. In the housing 1 is a hollow spindle 4 mounted, which is not displaceable in the axial direction Part 5 and movable part 6 consists.

In the non-displaceable spindle part 5 are springs 7 and Support bush 8 arranged. The latter has inclined grooves on the inner surface and is 4-connected to part 5 of the spindle by slots. The bearing bush 8 encompasses the displaceable spindle part 6. In the slots of the displaceable spindle part 6 jaws 9 are housed on the inclined grooves of the Socket 8 and the (not shown in the drawings) Include blank. The clamping jaws 9 are permanently attached to the blank by the spring 10 inserted in the hydraulic cylinder 11 pressed on. Hydraulic cylinder 11 is controlled by lever 12 (Fig. 2) and planks 13 with the axially displaceable Spindle part 6 (Fig. 1) connected. On the non-displaceable spindle part 5 there is an introduction 14 and one of the gears Cantilever arm 16 is attached to flange 2, the centering hole

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gen 17 for the assembly of a heating inductor 18 exactly in the Has rolling axis. Heizindufctor 18 is with the help of planets 19 and screws 20 attached to the cantilever arm 16 · It is to the Heizindufctor 18. to protect from impact, at the location of the The guide 21 is provided for the blank outlet.

D ^ LS double chuck works as follows.

When feeding the blank through the control and The push-in device is made with the help of a sleeve chuck (not shown in the drawing), the sliding Spindle part 6 moved to the left together with the clamping jaws 9 taken along by the blank. Here are clamping jaws 9 pushed apart and let the blank through

The blank is driven by the control and pusher device that causes the gears 15 to rotate jerkily. This jerky rotation of the gears 15 is on the non-displaceable spindle part 5 »the bearing bushing 8 and the clamping jaws 9 transferred, which the blank around his Rotate the longitudinal axis.

Has support bushing 8 to prevent the intermediate chuck axial rolling forces absorbed by the sleeve chuck are to be recorded, not fixed in the axial direction Stop, but rests against spring 7.

When changing the clamping jaws 9, the planks 13 (FIG. Z) are pivoted to the side and the displaceable spindle part 6 is pushed out to the left. Here, the clamping jaws 9 come into a position opposite the recess 3 (FIG. 1) _t

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through which they are replaced.

If during operation the hollow ing be taken out must, the lever 12 and the displaceable spindle part 6 with clamping jaws 9 through the hydraulic cylinder 11 to the left postponed. Here, jaws 9 release the blank and the latter can be removed from the intermediate chuck unhindered will.

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Claims (2)

193218Λ Patent attorneys
ZELLENTIN υ. LUYKEN ^ ₂₅ . _June 8000 Munich 22 .O .-. Uunx Zweibrückenetf. PATENT CLAIMS ..) Intermediate chucks for tube cold rolling mills, the one Has housing with a hollow spindle arranged in it, in which Slotted clamping jaws are housed, which hold the blank include, characterized in that it is equipped with a heating inductor (18) that allows the passage of the pipe does not prevent. . ■ 2. intermediate chuck according to claim 1, d a d u r c h g ek e η η ζ ei ch ne t that on the face of the clamping. a chuck housing (1) flange (2) is provided on the cantilever arm. (16) is attached with centering bores (17) for mounting the heating inductor (18). 009882/017 8 -ψ Blank page