CN2191048Y - Axial fixator for roll - Google Patents

Abstract

The utility model provides an axial fixing device for rollers with a same shaft type for fixing a thrust bearing. The utility model adopts the inner retainer ring of a thrust bearing without an end cover, which can be assembled with high concentricity of a roller and a combined nut which can eliminate the assembly gap of the screw threads, and simultaneously, the utility model also adopts a positioning mechanism of a thrust bearing, which can effectively prevent rollers from axially moving in chains; therefore, the dimensional precision of rolled pieces can be greatly improved.

Description

Axial fixator for roll

The utility model relates to a kind of axial restraint device of roll, particularly relates to a kind of stiff mill working roll that prevents and produces the roll mandrel of axial motion to fixture.

Because stiff mill in process of production, working roll generation axial motion will directly influence the raising of workpiece measurement precision, and relevant professional is that the axial restraint device that prevents roll axial motion breaker roll carried out many-sided improvement both at home and abroad." steelwork teacher " (Iron and steel Enginer) the 10th phase in 1974 had once been published one piece of research report that is entitled as " application of short stressed mill housing on various rolling mills " (Applicationof short stress path stands in different types of rollingmills) of Sweden " Han Sijiding " (Hans Gedin) professor, introduced in the literary composition a kind of mainly by the thrust bearing that is installed in non-transmission side roller head place, roll mandrel to adjusting roll mandrel that bolt and triangle posture support formed to fixture.At this roll mandrel in fixture, its thrust bearing internal axle sleeve has end cap, this end cap is fixedly connected with four bolts and roller head, its thrust bearing outer shaft and roll chock are fixedly connected, carrying out roll mandrel roll and bearing block when adjusting moves together, adjustment amount is very little, maximum adjustment amount will be lower than the gap between four the column bolts and its nut on the roll chock, otherwise these four column bolts just can't rotate, this just makes roll pass be difficult for realizing " centering " by axially adjusting, thereby has increased the difficulty of processing of roll.In addition, because of being difficult to make its thrust bearing and roll, this fixture reaches due concentricity, easily swing during the roll rotation, increase the gap of thrust bearing internal axle sleeve and roller head, make roll generation axial motion, the axial force that produces during rolling garden steel is bigger, and the axial motion that causes is even more serious.

At the beginning of 91, the short power stiff mill of being developed by China Beijing Ministry of Metallurgical Industry equipment research of SY-II type moves in the operation of units such as this steel special steel company and Chongqing Special Steel Plant in succession.The axial restraint device of this milling train mainly is an alignment pin of having set up gear-driven mechanism for axial adjusting and band spring thereof except that changing some modular construction form.This roll mandrel makes roll pass be easy to " centering " to fixture owing to can axially adjusting easily, thereby the machining accuracy and the difficulty of roll pass size have been reduced, but its gear drive and elasticity location lock processed complex, manufacturing expense height, and, also because the back-up ring nut in its thrust bearing positioner carries out self with bolt after by a side opening locks, poor reliability in the work still is difficult to eliminate the roll axial motion.

The purpose of this utility model provide a kind of can be on the basis that breaker roll is axially adjusted, can effectively prevent roll produce axial motion and simple in structure, cost is lower, the roll mandrel of good reliability is to fixture.

For achieving the above object, the utility model adopted a kind of coaxial-type fixedly the roll mandrel of thrust bearing to fixture, it mainly comprises thrust bearing, the outer back-up ring of thrust bearing, roll mandrel is to the combination nut of adjusting swivel nut and clamping screw thereof and this fixture and roll chock being fixedly connected, set bolt and the thrust bearing inner shield ring that is used for limiting the roll axial motion, the back-up ring nut, the thrust bearing detent mechanism, it is characterized in that, this fixture is on the basis of having selected the no end cover type thrust bearing inner shield ring that makes the high concentricity assembling of thrust bearing and roll with assurance for use, also selected for use by the locking swivel nut, bivalve back-up ring and positioning baffle, the thrust bearing detent mechanism that lock(ing) bolt is formed also is provided with the location plate on " convex edge " of back-up ring outside thrust bearing.

At aforesaid roll mandrel in fixture, described no end cover type thrust bearing inner shield ring can be divided into two parts of left and right inner shield ring, be installed in cover and arranged on left and right sides in the thrust bearing respectively, also can adopt the right inner shield ring of a lengthening to be installed in the cover outside in the thrust bearing separately with integral form.

In fixture, described back-up ring nut fastens as one with positioning baffle and makes positioning baffle block the locking swivel nut at aforesaid roll mandrel.

, in fixture, also have on the convex edge of the outer back-up ring of described thrust bearing and be convenient at aforesaid roll mandrel its rotation and the groove that can be used to fixed locating stud simultaneously.

Roll mandrel provided by the utility model is compared with existing high rigidity short stress path rolling mill working roll axial restraint device to fixture has following advantage:

1, since in this fixture fixedly its structure of inner shield ring of thrust bearing and installation form can not make thrust bearing be to produce tangible nonconcentricity with rolling, both coaxial assembling and operation have been realized, can alleviate greatly in the milling train work and pull the trigger the degree of giving birth to the roll axial motion, prevent that the reliability of roll axial motion from can improve the workpiece measurement precision effectively, reducing waste product thereby improved this fixture because vibrations increase both fit-up gaps.

2, because this fixture has been cancelled the pinion of former axial adjustment on the basis that has kept former " SY-II type " high rigidity short stress path rolling mill working roll mechanism for axial adjusting feature, change former gear wheel into the thrust bearing that has groove on the protruding outer outer back-up ring, and replaced the former alignment pin that has spring with simple location plate, this just simplifies this mechanism when can guaranteeing original adjustment and locking effect greatly, has reduced manufacturing cost.

3, the back-up ring nut owing to this fixture is stuck on the roll by positioning baffle, locking swivel nut and bivalve back-up ring, can do not shaken and be become flexible, produce the roll axial motion so can prevent the fit-up gap from becoming big effectively, guarantee the milling train stable and reliable operation, reduce equipment breakdown, reduce spare parts consumption, improve operating rate, increase output.

Below in conjunction with drawings and Examples the utility model is described in further detail:

Fig. 1 is the cross-sectional view of the utility model one embodiment;

Fig. 2 is that present embodiment A-A as shown in Figure 1 is to view.

Roll mandrel described in the utility model to fixture be in the conventional roll bearing of being packed in the roll neck position of roll after installing on the support, assemble in the following manner.

As shown in Figure 1, at first, combination nut 5 usefulness set bolts 4 back-up ring 19 outside roll bearing is preloaded onto on the roll chock 2 and screws in roll mandrel to adjusting swivel nut 6 along the internal thread of combination nut 5.

Because what present embodiment adopted is split type thrust bearing inner shield ring, it is divided into left inner ring 12 and right inner shield ring 13, so, should be earlier after combination nut 5 has been pre-installed left inner shield ring 12 along the outside that roll roller headgear installs to roll bearing 3 internal bearing sleeves suit thrust bearing 7, right inner shield ring 13 successively again.Then, can install to the outside of thrust bearing 7 outer bearing sleeves to outer back-up ring 17 covers of thrust bearing and a locking swivel nut 14 is preloaded onto makes it be close to right inner shield ring 13 on the roller head.

In the present embodiment, sealing ring 16 is installed in the back-up ring nut 8 appearance seal grooves, therefore, can be earlier as shown in Figure 1 after finishing above-mentioned assembling, bivalve back-up ring 15 is packed in the groove of roll roller head, after thrust bearing 7 is added lubricant grease back-up ring nut 8 spinnings of having inlayed sealing ring 16 outside thrust bearing on the locking swivel nut 14 in the back-up ring 17.At this moment, under back-up ring nut 8 and locking swivel nut 14 screw thread relative motions effect, force locking swivel nut 14 to leave right inner shield ring 13 and move outward, until the stop portion that pushes up bivalve back-up ring 15.Then, can be fastened to positioning baffle 10 usefulness lock(ing) bolts 11 on the back-up ring nut 8, outer back-up ring 17 is fastening good with thrust bearing to adjusting swivel nut 6 roll mandrel for available then clamping screw 18, more as shown in Figure 2, is inserted into thrust bearing outward in the back-up ring 17 corresponding locating slots 20 locating plate 9.At last, by the bolt 4 that is tightened eliminate combination nut 8 and its between the two and combination nut 8 and roll mandrel to the thread pitch of adjusting between the swivel nut 6, thereby finished the assembling task of this fixture.

Pull up location plate 9, unscrew set bolt 4, because of special-purpose wrench rotates the outer back-up ring 17 of thrust bearing, can make the roll mandrel that is connected as one by the outer back-up ring 17 of clamping screw 18 and thrust bearing to adjusting that swivel nut 6 drives that rolls 1 thrust bearing 7 parts such as grade produce axial displacement simultaneously and the axial adjustment that realizes roll easily, adjustment finishes, and will locate plate 9 again and be inserted into the interior and bolt 4 that is tightened of corresponding locating slots of the outer back-up ring of thrust bearing 17 20 and can realize breaker roll 1 axial retightening.

This fixture is in the milling train running, when producing, the roll axial force passes on the thrust bearing 7 along the roll longitudinal center line, thrust bearing 7 is subjected to left inner shield ring 12, the outer back-up ring 17 of right inner shield ring 13 and thrust bearing, back-up ring nut 8, locking swivel nut 14, the position-limiting action of bivalve back-up ring 15, thereby axial force is suppressed, another that acts on thrust bearing 7 partly axial force then through roll mandrel to adjusting swivel nut 6, the outer back-up ring 17 of thrust bearing, combination nut 6, set bolt 4 is sent to roll chock 2 and the mill stand that is connected as a single entity with it bears, thereby can prevent the axial motion of roll 1 to greatest extent.

To be the roll mandrel made of technological guidance really can prevent to receive satisfied effect aspect the roll axial motion carrying out roll mandrel flexibly to fixture through probationary certificate to the foregoing description that provides with the utility model when adjusting, the workpiece measurement precision is significantly improved, reached the specification requirement of international standard ISD/1035/IV, Details as Follows shows:

With rolling 11 6DSizMaD φ, 55 round steel measured datas and international standard rule

Decide the tolerance table of comparisons

Position maximum allowance contrast

On once

The first from left right side

Oblique angle, a left side

Right oblique angle

Existing Sy-II type milling train

+0.68

+0.7

1.68

1.48

Use the milling train of present embodiment

+0.5

+0.46

+0.7

+0.6

Rolled steel bar international standard ISO/1035/IV predetermined tolerance

±1.0

±1.0

±1.0

±1.0

Designer of the present utility model is also once on the foregoing description basis, 12 cancellations of thrust bearing left side inner shield ring and with its right inner shield ring 13 suitably lengthening be assembled into another embodiment of the present utility model, obtained the techno-economic effect of the satisfaction close after on probation equally with the foregoing description.

Claims (4)

1, a kind of roll mandrel is to fixture, it mainly comprises thrust bearing, the outer back-up ring of thrust bearing, the combination nut of axially adjusting swivel nut and clamping screw thereof and this fixture and roll chock being fixedly connected, set bolt and thrust bearing inner shield ring, the back-up ring nut, the thrust bearing detent mechanism, it is characterized in that, selected thrust bearing inner shield ring is the no end cover type thrust bearing inner shield ring that can guarantee with the roll concentric fits, selected thrust bearing detent mechanism is by the locking swivel nut, the bivalve back-up ring, positioning baffle and lock(ing) bolt thereof are formed, and back-up ring and back-up ring nut contact position also are provided with sealing ring outside thrust bearing.

2, a kind of roll mandrel as claimed in claim 1 is to fixture, it is characterized in that, no end cover type inner shield ring can be left inner shield ring and two parts of right inner shield ring that can be installed in the cover left and right sides in the thrust bearing respectively, also can adopt the right inner shield ring of a lengthening separately.

3, a kind of roll mandrel as claimed in claim 1 is characterized in that to fixture, and the back-up ring nut is and the fastening all-in-one-piece of positioning baffle.

4, a kind of roll mandrel as claimed in claim 1 is characterized in that to fixture, also has on the convex edge of the outer back-up ring of thrust bearing and is convenient to its rotation and the groove that can be used to fixed locating stud simultaneously.

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