CN101480662B - Grooving pushing-in rotary type roll shaft and roll stand - Google Patents

Abstract

The invention relates to a notching pushing rotary type roll shaft and a mill frame, which belong to the technical field of the guide system of the steel rolling technique. Both ends of the roll shaft are planular, the cross section of the end part of the roll shaft is in a rectangle, the two vertical edges of the rectangle are in an arc shape, and the upper part and the lower part of the front end of the roll shaft are in a notching type structure. Furthermore, the roll shaft and the mill frame are assembled according to the following steps: (1) respectively installing bearing outer rings into inner cavities positioned on both ends of an idler pulley, assembling the bearing outer rings in place, and filling bearing grease into the bearing outer rings; (2) assembling a bearing positioned on one end of the roll shaft in place, inserting the roll shaft into the inner cavities of the idler pulley, then turning the roll shaft in an angle of 180 DEG, installing a bearing positioned on the other end of the roll shaft in place, and placing bearing gland bushes on both ends of the bearings; and (3) pushing a roll shaft palm end of an assembled band idler pulley to the mill frame along thenotching of the mill frame to a fixed position of the roll shaft, rotating the roll shaft in an angle of 90 DEG, pressing a square block on the roll shaft, installing a fixed cover plate on the upperend of the block, and fixing the fixed cover plate on the mill frame through a fastening screw rod.

Description

Grooving pushing-in rotary type roll shaft and roller frame

Technical field

The present invention relates to a kind of grooving pushing-in rotary type roll shaft and roller frame, belong to the guide and guard systems technology field of steel rolling process.

Background technology

As everyone knows, using the rolling guide box body to replace the purpose of various sliding guide devices, is to alleviate the guide and guard working face to greatest extent and the friction that enters pass rolled piece surface, enters pass, improves product surface quality greatly thereby effectively set upright rolled piece.Tandem rolling, semi-tandem rolling unit are all selected the rolling guide assembly at present, and also adopt rolling guide to improve product surface quality for the cross-arranging type layout as far as possible.

At present, in order to improve the stability of rolling guide box, guarantee that rolled piece correctly enters pass, roll shaft must have enough rigidity (intensity) opposing flexural deformation, a phenomenon generation can be prevented and scurry axle, be fallen to effective mechanical assembly method, and the assurance guide wheel is normally located, and guarantees the steel dimensional stability.The quality of the mounting means of roller frame and roll shaft is of crucial importance to stablizing the steel size for this reason.

The primary structure characteristics of this rolling guide box: adopt pin to go into formula roll shaft is installed; Bearing is assemblied on the roller frame, and this design feature has determined that pony roll and roll shaft are stationary fit, and lower roller shaft is in rotary state in working order.In working order down, rolled piece progressively enters between the guide wheel of rolling guide its section by the clamp type entry guide effect and sets upright, make rolled piece correctly enter pass according to the requirement of rolling condition with erectility.Rolled piece plays pendulum after entering guide plate all the time, if rolled piece acts on the Asymmetric Rolling that roll pass produces the inevitable factor of rolled piece of advocating to come from of guide wheel.Therefore rolled piece causes roll shaft not only to bear the effect of bending stress to the effect of guide wheel but also bears the effect of axial force, and bearing mainly bears the effect of extrusion stress.

Roll shaft is installed and is adopted pin to go into formula, and the axle head of roll shaft does not have the positioner of axial retaining, and it is conspicuous scurrying axle under responsive to axial force, fall an accident.Bearing is installed on the roll shaft, strengthens bearing designation roller frame width size is strengthened, and influences the layout quantity of pass on roll.Guide wheel and roll shaft are taked the adverse effect of stationary fit: the one, and guide wheel is in tight contact condition with rolled piece at work, though the effect of cooling water is arranged, but the influence of inevitable expanded by heating factor and change its assembling character causes the wearing and tearing between roll shaft and the guide wheel even scraps; The 2nd, roll shaft and guide wheel dismounting difficulty, labour intensity is big.

Consult document, roll shaft and roller frame assembly method are pin and go into formula or plug-in type, have not found grooving pushing-in rotary type.

CN1129152 discloses a kind of rolling unit with two roller bases.Each roller base has perforate to being formed in the roll stand frame, lays respectively at a side of mill train line (PL), and a pair of eccentric part respectively has an eccentric orfice, and it is internal that eccentric part inserts perforate, and an axially spaced-apart is arranged between them.Respectively be installed with a roll on a pair roller axle, and penetrate offset hole.A pair of regulating shaft can be rotatably set in the roll stand frame, and a pair of worm screw is installed on each regulating shaft.One gear and regulating shaft engagement.The position of roll can be changed by eccentric part.

Summary of the invention

At the deficiencies in the prior art, the invention provides a kind of assembly manipulation simple and efficient, make roller frame and roll shaft realize stationary fit, prevent and scurry axle and fall an accident, can improve roll hardness simultaneously, strengthen the grooving pushing-in rotary type roll shaft and the roller frame of the stability of rolling guide.

A kind of grooving pushing-in rotary type roll shaft, roll shaft two ends are flat, and its cross section, end is rectangular, and two vertical edges of rectangle are arc.

The length of the every end in described roll shaft two ends is the 12.5-13% of whole roll shaft length.

A kind of and the corresponding roller frame of pushing-in rotary type roll shaft type, roller frame front end position up and down are the open flume type structure.

The assembly method of a kind of pushing-in rotary type roll shaft and roller frame, installation step is:

1), bearing outer ring is installed in the inner chamber at guide wheel two ends respectively, and is seated, inserts bearing grease in the outer ring;

2), the bearing of roll shaft one end is seated, roll shaft is inserted the guide wheel inner chamber, overturn 180 ° then, the bearing with the other end is seated again, and bearing gland is placed in the bearing two ends;

3), to place, roll shaft fixed position, again with the roll shaft half-twist and press square sprue, securing cover plate is installed in the sprue upper end, with fastening screw cover plate is fixed on the roller frame along roller frame fluting pusher drum frame for the roll shaft homalocephalus of the band guide wheel that will assemble;

Bearing is assemblied in the guide wheel two ends, and its favourable part is: guide wheel and roll shaft can assemble by bearings at both ends, make the two be easy to assembling, and line of tension is short, and sag is little, avoid causing because of sliding friction the damage of the two; Bearing designation, roll shaft enlarged diameter, the circular arc Guiding wheel structure is constant, and plain-barreled roll guide wheel diameter reduces, and the working strength of centralizing system is improved synchronously, does not make the width dimensions increase of roller frame end portion influence the pass utilization rate greatly because of bearing designation becomes; In working order down, the roll shaft of tradition inlet guide and guards must rotate, and roll shaft must be the poker column type, must take pin to go into the formula installation to roll shaft and guide wheel, its axial location performance a little less than, because of the two requires stationary fit, make the dismounting operation very difficult.On the contrary bearing is contained on the guide wheel, roll shaft is remained static, associated components is carried out process matched therewith to be improved, can realize axial restraint and convenient mounting or dismounting simultaneously, the roll shaft two ends are made flat formula for this reason, roller frame front end is made open flume type in the position up and down, groove width is as the criterion to make things convenient for the roll shaft homalocephalus to push, realize roll shaft, guide wheel, bearing and bearing gland assembled in advance, these parts that only need during assembling to assemble are in advance located to the roll shaft fixed position along roller frame fluting pusher drum frame, subsequently roll shaft is revolved and turn 90 degrees and press square sprue and get final product, assembling process is easy, fast, the roll shaft rotation has effectively been stopped in the effect of sprue, falling a phenomenon takes place.

On assembly method, roll shaft is gone into formula by original pin and is changed square sprue design into, for improving the rigidity of roll shaft, diameter increases to φ 30mm by φ 20mm, and the pony roll bearing designation becomes the 7607E type by 7606E, and adaptive with it transformation is that the pair roller frame is carried out the fluting design, poker column type roll shaft changes the flat formula in two into, because it is as a whole that sprue, bearing gland, guide wheel are connected with the roller frame, can improve roll hardness simultaneously, strengthen the stability of rolling guide.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Wherein, 1, the roller frame, 2, the water hole, 3, sprue, 4, bearing gland, 5, roll shaft, 6, bearing, 7, pony roll, 8, roller frame fluting.

The specific embodiment

Following enforcement is used to set forth the present invention, and protection scope of the present invention is the structural modification of its assembling mode and assembly parts.

Embodiment:

A kind of grooving pushing-in rotary type roll shaft, roll shaft two ends are flat, and its cross section, end is rectangular, and two vertical edges of rectangle are arc.

In the roll shaft two ends of described flat formula shape, the length of every end is the 12.5-13% of whole roll shaft length.

A kind of and the corresponding roller frame of pushing-in rotary type roll shaft type, roller frame front end position up and down are the open flume type structure.

The assembly method of a kind of pushing-in rotary type roll shaft and roller frame, installation step is:

1), bearing outer ring is installed in the inner chamber at guide wheel two ends respectively, and is seated, inserts bearing grease in the outer ring;

2), the bearing of roll shaft one end is seated, roll shaft is inserted the guide wheel inner chamber, overturn 180 ° then, the bearing with the other end is seated again, and bearing gland is placed in the bearing two ends;

3), to place, roll shaft fixed position, again with the roll shaft half-twist and press square sprue, securing cover plate is installed in the sprue upper end, with fastening screw cover plate is fixed on the roller frame along roller frame fluting pusher drum frame for the roll shaft homalocephalus of the band guide wheel that will assemble.

Claims (1)

1. the assembly method of pushing-in rotary type roll shaft and roller frame is characterized in that installation step is:

1), bearing outer ring is installed in the inner chamber at guide wheel two ends respectively, inserts bearing grease in the outer ring;

2), the bearing of roll shaft one end is seated, roll shaft is inserted the guide wheel inner chamber, overturn 180 ° then, the bearing with the other end is seated again, and bearing gland is placed in the bearing two ends;

3), to place, roll shaft fixed position, again with the roll shaft half-twist and press square sprue, securing cover plate is installed in the sprue upper end, with fastening screw cover plate is fixed on the roller frame along roller frame fluting pusher drum frame for the roll shaft homalocephalus of the band guide wheel that will assemble.

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