DE2214233A1 - ROLLING STAND FOR PIPE COLD ROLLING MILLS - Google Patents

Description

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8000 Munich 22

Zweibrjjkensir. 6th

Institut cernoj metallurgii, P 40 074- / 2

Dnepropetrovsk / USSR, March 23, 1972

ul. Pisarzevskogo 5. RIT / Kk ■

WiliZGERÜSO? '

The invention relates to roller stands for rolling mills and more precisely on rolling stands for two-strand drilling cold rolling mills.

It is a rolling stand intended for drilling cold rolling mills widely known which includes a stand with support guides. In the stand are an upper and a lower roller built in, which carry caliber on their sods while on their Middle part each has a fixed gear, whereby on both

the sides of these gears are placed on the rollers support rollers, which with the support guides in Interaction stand "

The rollers are driven by toothed racks attached to the stand.

However, this roll stand construction has a number of disadvantages, mainly in its complexity

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Ensure rolling mill operation ^ The equipment ^ has ten gears and four racks, i.e. there are ten gear drives, the sudden ones / intermittent / working on them attacking alternating loads «

In addition, the Rolling tool parts are held in their relative position in the transverse direction to one another by support plates which are mounted on push rods sit, with these plates gradually wearing out during the rolling process. This has variations in dimensions the deformation zone and thereby also the dimensions of the finished pipe to the bottom, so that practical

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no precise thin-walled tubes in a rolling mill described Construction can be generated.

In addition, the roll stand construction described enables not a high speed in pipe rolling.

Ss is the goal of. Invention, those enumerated above To eliminate disadvantages

The invention is based on the object

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to provide a tube cold rolling mills specific rolling stand that great reliability has, allows the rolling of pipes with _a gene UEN geometric dimensions and ensures high power mill *

This task is accomplished by creating a pipe cold rolling mill « solved certain roll stand, which has a stand with support guides in which an upper and a lower roll are built in, which carry calibers at their ends, while

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a gear is attached to its middle part, with on both sides of these gears on the rollers support rollers are placed, which interact with the support guides, and also one on the stand lower part.befestigte Rack has, according to the invention that on the lower roller fortified gear from a gear block with different gear rings Diameter consists, the middle ring with the gear of the upper roller and the outer rings with the Rack in engagement

Such a structural design of the roll stand ^ makes it possible to create a multi-strand tube cold rolling mill that is fast to the end, is high-performance and tubes with genas Geometric dimensions generated. Below is an exemplary embodiment of the

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Invention considered with reference to the drawing, it shows

Pig «1 the front view of the partially cut open: scaffolding according to the invention and -

Fig. 2 shows the side view of the same frame.

The frame has a movable stand 1, which can consist of one piece . Or is designed in the form of two independent frames, the upper and lower support frame bars are bent uniformly with a certain radius of curvature. This makes it possible to avoid local stress concentration in the transition cross-sections of the stator

In the stand there are a pair of kaocotts 2 on the . 3O9840 / Q12V

Upper side and a pair of cassettes J on the lower side, in which bearings 4 of an upper roller 3 and a lower roller 6, respectively, are inserted

In the middle part of the lower roller 6 a gear block 7 is rigidly attached to it to drive the same, the outer rims correspond to the mean rolling diameter of the rolling tool, while the middle rim corresponds to the outer diameter corresponds to the rolling tool path.

The outer rims of the gear block 7 stand with a Rack 8 in engagement, which is attached to the lower part of the stator! is, The position of the rack 8 can be regulated in the longitudinal direction

The gear block 7 is supported on both sides by supporting rollers that are placed on the lower shaft 6 and rigidly attached to it 9 limited, which with support guides 10 of the stand base cooperate. The mitti & ^ e ring of the gear block stands with a gear 11 in singriff, which is rigid on buckets spring wedge 12 / or in another way / is attached in the middle of the upper roller 5, the diameter of this gear 11 being the Corresponds to the outer diameter of the rolling tool / track. On both Sides of the gear 11 are placed on the upper roller 5 support rollers 13, which as a whole with the gear or can be carried out independently of this.

// 3
The lumps of the top roller j? are over! guided tours 14 with

the upper part 15 of the stand 1 'connected. By moving

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of the pübxurigen 14 in the longitudinal direction becomes the size of the gap regulated between Bollen IJ and I guides 14

On both Sadsn the upper roller 5 and the lower roller ■ 6 are caliber 16, their position on the rollers 5 »6 with With the help of slots or in some other way is determined and on these rollers with the help of nuts and lock nuts 1? are attached.

Serves to taper the gap between the rollers 5 »6 a device IS /Pig.2/. The scaffolding is mite'Viem internal engine blindfolded by eyes 19

During the rolling, the stand makes a reciprocating motion while the rollers 5 to 6 turned back and forth will. The load is from the top-side cassettes Via wedges 20 and support sectors 21 on the support frame of the Transfer stand 1 of the roll stand. ■

The device works as follows.

During the rolling leads; the frame from a to and fro movement that is given to it by a / crank mechanism not shown in the drawing ₉ . Here, the rollers 5t 6, which are built into the stand 1, perform a reciprocating movement with the frame and are rotated to and fro with respect to this.

When the scaffolding is moved, the outer rings roll of the gear block 7 on the rack 8 fixed immovably on the stand 1 The movement is via the middle, with the gear 11 engaged ring of the

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Transfer the gear block 7 to the upper roller 5. Here roll themselves on the lower roller 6 böf © 3tierter Hollen 9 on the guides 10 of the stand 1 and the loft 15 of the upper roller 5 on the guides 14 from.

the described arrangement of the gear 11, the tooth 7, the support rollers 9 »13 and the guides 10, 14, the torque is symmetrically transmitted to the caliber 16. In addition, the control of the gear meshes and the cross. the column with wear and tear; the gears allows.

The one according to the invention intended for cold rolling mills The mill stand is simple in construction since it has a minimum number of gear trains, regulating each independently

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Strand des Mehrstrangraalzwerlcs <^ r possiblei £> · high rolling mill output as well as the production of tubes with precisely adhered to geometric dimensions.

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Claims (1)

Z 2 I 4 L O 3 ₄₀ 07V2 «_: 5. March 1972 - 7 - "HM / Kk PA © in RGhrkaltwalzyjerk a particular roll stand, the one Has stand with Stüta guides, in which an upper and Potash a lower roller are installed, which bear at their enders, while a gear is attached to each of its central parts, Support rollers are placed on both sides of these gears on the rollers, with the support guides ans Working together and also one attached to the lower part of the stand Rack, characterized in that that the gear attached to the lower roller (($) from a Zahuraä block (7) with different gear rings Durchncssers consists, whose middle ring with the gear (11) ü3r upper roller (5) and its outer rings with the Rack (8) are in engagement. 3G9840 / 0121