DE3405742A1 - CANNULAR REELS FOR MANIPULATING ROLLED GOODS - Google Patents

Description

Applicant: Franz Baumann Ing. (Grac) Hagen, 1 ^ .29). * __ Augustastraße 5 3405742

"· * ^ 58oo Jiagen J _-

■ -3- P 34 o5 742.0

(G 84 04 827.1) Cantilever rollers for manipulating rolling stock

The invention relates to the edging rollers of a roller tong edger for manipulating blocks or rolling stock, preferably on the roughing stand of a rolling train, with the radial groove turns on the roll shell of such edging rolls in the contact areas precisely adapted to the different block cross-sections of a skewer / square calibration are.

When the blooms for rolled sections are hot-rolled, it is a multi-stand stand with a reversibly controllable roughing stand Profile line required, by means of several rolling passes the originally square block or exit transverse. cut for the subsequent rolling passes in the next stands, FIG 1.

With a roller nipper, FIG 2, the block is gripped before or after the respective rolling pass, raised and brought into position and pierced from one roll pass of the block roll to the next, FIG 3 So far, edging rollers with radial groove turns have been used to manipulate the blocks or the rolling stock either just a block cross-section of a rolling pass or approximately the entire pass sequence of a rolling stand have been adjusted. As a result, at best, only the block cross-section of a rolling pass with the same caliber cross-section is obtained of the roll mantle in accordance.

With only one caliber shape on the roll jacket of the edger roll, however, the different cross-sectional reductions also have to be a stitch sequence, e.g. that of a skewer / square calibration can be manipulated. As a result of the strong hydraulic Contact pressure per edger roll to grip the block and the non-matching cross-sectional shapes of the block for Roll jacket are parallel or at an angle to the longitudinal axis of the

Blockes caused severe pressure marks on the surface of the block.

The various options are shown in FIGS the emergence of pressure marks on the skewer edge after the 3rd rolling pass, if when gripping with the edge rollers the block is approached. The roll jacket radius III on the block surface can be up to about 1o ram across Shift to the longitudinal axis and cause oblique or crooked pressure marks as well as thrusts on the block edges. This surface damage leads to different overlapping errors on the finished profile Education.

In addition, major damage occurs when changing the curb rollers caused on the outer radius I of the roll mantle.

The cant roller is held by a cone in the swivel arm. Due to an axial screw fastening, the cone sits so tightly in the socket that this connection can only be released by hitting the outer radius of the barrel with a heavy hammer. This results in the uncured RoIlmantel strong impact points, the _y generate on its surface marks in the form of equal strength when walking over the block lead the finished profile to occur at specific intervals arcuate overlap error. This is illustrated by the outer radius I of the lower edge roller in FIGS. 4, 5 and 7.

These impact points on the unhardened roll cover of the material St 50-2 show that once such impact points must be avoided and, on the other hand, during hot rolling with the action of heat and scale, only a heat-treatable and heat-resistant steel with good wear resistance can withstand these high loads.

Furthermore, from FIG if to 7 also the large angle and Differences in dimensions with the narrowest roll adjustment visible after the 3 stitch with partially twisted edging. As a result, there is basically any kind of damage during manipulation by the cant rollers on the respective rolling pass possible.

- 3 -

The significant differences are also with FIGS. 8 to 11 of the roll jacket caliber in its previous form in comparison to the rolling blocks from the 1st to the 4th pass. From these drawings it becomes clear that the respective block calibers cannot be guided tightly enough and thereby wrestling between the two canters. It will also be when you run over the smaller block edges Pinching over the larger inner roll jacket radius II due to the high contact pressure on the block edges caused.

The parallel areas of contact of the newly developed shape were comparatively shown on the upper roll cover of FIG and 9 drawn.

The feed of the block in its longitudinal axis to the roll stand by the roller table rollers can have a very unfavorable effect. When piercing into the rolling pass, the block is often not immediately grabbed and an attempt is then made to push the block into the rolling pass with momentum by turning the roller table rollers quickly. This process has to be repeated to the 2.0 part and the strong rubbing of the roller table rollers results in material being pushed over the block edges.

This damage to the block surface such as pressure marks, bruises, thrusts, etc. lead to the finished rolled profile to overlap-like surface defects. In the case of hot-rolled flat steel for leaf springs, this has to Consequence that such defects in the surface of the flat steel as well as on sensitive rolled sections as a result of them Notch effect must lead to premature breakage or failure.

Profiled gripping rollers for edging block cross-sections are known from DT-AS 1 ZWb 622 and DT-AS 1 284 923. As a result of the non-parallel and in some cases angular caliber design of the gripping rollers, crushing of the surface of the block or rolled material is inevitable.

It was made known with the DT-OS Z ^ 33 287 an edging device for skewering of billet-shaped rolled material,

wherein the longitudinal edges of the billet on the conical supporting surfaces of two adjusting rollers arranged parallel to one another unroll while the block is placed in a skewer position. By unrolling the heavy stick on the adjusting rollers Here, too, crushing of the material can be caused on the longitudinal edges of the billet.

It is clear from the two patent specifications described above that these technical devices are not suitable to avoid surface damage when manipulating the rolling stock.

The invention is based on the object of designing the roller casing of the canting rollers in such a way and also of making them controllable in this way to set up that when gripping and holding the different block and rolling stock cross-sections of a stitch sequence on the Surface rough bruises or thrusts, which occur as surface defects on the finished rolled profile, are avoided will.

The requirement of a flawless material surface without any defects is for certain profiles, "for example Flat steel is of crucial importance for leaf springs due to their dynamic stress.

According to the invention, the object is achieved in that the various Opening angle of the contact surfaces parallel to each rolling pass with the different block or rolling cross-sections E.g. a skewer / square calibration per stitch sequence in a block or caliber roller is adapted, as shown in FIG. 12 as well as 13 to 16. For safe holding and guiding in the caliber of the roll mantle, even the smaller roll cross-sections of a stitch sequence must the two cant rollers can be moved together as closely as possible. So that the smaller radii of the block edges against the Rolling jacket cannot run up and thereby cause crushing at the edges, is in connection with the inner one Opening angle is the inner radius I of the roll jacket caliber to enlarge something and interpret it deeper, so that the block edge is either free or without contact pressure in radius I.

can run.

In order to avoid deep pressure marks when the curb rollers approach the block, the two outer radii are on Lay out the roll jacket as large as possible.

For the high loads on the roll mantle as a result of the rolling operation a heat-resistant and heat-resistant steel with high wear resistance is required. To fix the canter rollers in the swivel arm of the canter, a support structure should be used that has a enables quick release and easy changing of the roles. To avoid rubbing marks and thrusts on the Block edges when pushing into the rolling pass an independent drive of the edge rollers is necessary. An additional requirement is a synchronous switching of the own drive of the curb rollers with the drive of the roller table rollers.

The advantages achieved by the invention are in particular that when manipulating with a roller pliers edger Surface damage to the blocks or rolling stock can be avoided, some of which is considerable occur as an overlap-like error in the finished profiles and lead to rework or rejects.

The invention is described in more detail below with reference to the exemplary embodiments shown in the drawing. It shows:

1 shows the schematic representation of the operating systems of a multi-stand profile mill from the pusher furnace to the duo roughing stand as well as the two roller nippers on the Roughing stand;

FIG. 2 shows a section from the area of the block stand with the two block rollers and the pairs of canters each side of the log roller;

3 shows the working positions of the two canter rollers Gripping / picking up and piercing the block in the rolling pass;

FIG k shows the adjustment of the edging rollers to the skewer edge after the 3rd rolling pass;

FIG 5 shows the employment of the Kanter roller roll mantles after 3 · stitch, when gripping, the block is approached with the lower roller cover;

FIG 6 shows the employment of the two Rollm ^ äntel after 3rd stitch, the edge axis is rotated 10 ° downwards to the block axis, with the lower roll the Block approached;

7 shows the adjustment of the roll sleeves after the 3 stitch, the edge axis is rotated upwards by 12 ° to the block axis, the side of the block is approached with the upper roll cover

8 shows the parallel areas of contact between the upper roll mantle and the skewer edge after the 1st stitch, below for comparison the previous form;

9 shows the parallel contact areas of the upper roll mantle to the square after the 2nd stitch, below the previous one Shape;

FIG 1o shows the considerable differences in size between the two Roll mantles and the skewer edge after the 3 stitch with the closest employment;

11 shows the large difference in dimensions between the roll sleeves and the square after the k * stitch (5 · stitch), the Kanter axis is rotated downward by 13 ° relative to the block axis;

FIG. 12 shows the different opening angles of the contact surfaces on the roll jacket of a stitch sequence from bloom or 1st to 5th roll pass;

13 shows the parallel areas of contact between the roll mantle and the skewer edge after the 1st stitch;

FIG 1 if the parallel areas of contact of the roll mantle to Square after the 2nd stitch;

15 shows the parallel areas of contact of the roll mantle to Sharp edge after the 3rd stitch and

16 shows the parallel areas of contact · of the roll mantle squared after the k. Stitch (5th stitch).

1 shows the operating systems in a schematic representation a multi-stand profile line, the roller clamp edger on both sides of the roughing stand. In pusher furnace 1, the blocks 2, which can weigh up to 1.5 tons

heated to over 1,2oo ° C. After the furnace has been discharged 3, the Block 2 is pulled over the cross conveyor 2+ with an underfloor chain hoist and then runs over driven roller table rollers 5 for removing the scale by a spraying system 6. Here, a high water pressure of over 15o bar the primary scale is hosed off the block. In the duo roughing stand 7, with reversing driven block rollers 8, block 2 becomes block 2 during the rolling process, each with a pair of edging rollers 9 manipulated on each side of the block frame 7.

With FIG 2, the manipulation, the mode of operation of the roller pliers edger 9 clarifies. The block 2 with about two tons of hydraulic pressure per cant roller 9 in held in a vertical position and moved in front of the rolling pass 1o. Since the edge roller 9 does not have its own drive, the block is moved in its longitudinal axis by means of the roller table rollers 5 driven to the block roller 8 and pushed into the roller caliber 1o. After the two block rollers 8 have grabbed the block 2 and this runs through the roller caliber 1o, the both cant rollers 9 opened, moved apart and downwards, rotated back by 90 ° into a horizontal gripping position and in front of the next rolling pass 11 to accommodate the the next rolling pass.

On the opposite side - behind the block roller 8 - is the end of the block 2 before exiting the rolling pass 1o with the

2.3 gripped the second horizontally positioned pair of canters 9, raised it vertically by 90 ° and brought it to the next rolling pass 11 for tapping. The block 2 is driven back in the opposite direction to the roller 8 by the roller table rollers 5 and pierced into the roller caliber 11.

After the entire stitch sequence has been passed on in the stand 7, the Block 2 after the last rolling pass over the roller table 5 to next roll stand for the further pass reductions.

In the elevation view of FIG 3, the edge rollers 9 are in the two working positions when gripping / picking up the block 2 with the two roll jacket caliber 12, as well as after rotating the swivel arm 13 by 90 ° to pierce the next one Rolling caliber 11 can be seen, the process of

Manipulation takes place in the same way as described in FIG.

FIG. K shows the canters and the diagonal block axes parallel to one another after the 3 · stitch with the closest roller adjustment. The large spacing of over 20 mm and the angular difference of around 13 ° between the roll jacket caliber 12 and the skewer edge 2 are illustrated.

In FIG. 5, the edge axis and the axis of the skewer edge 2 are parallel after the 3 stitch. With the radius III of the lower Rolling jacket caliber 12 is approached when gripping the skewer edge 2, the bottom of the block. Through the subsequent When the cant rollers move together, the radius III moves towards the center of the block and creates an incline on the surface of the block grooved pressure marks to the longitudinal axis. At the same time, thrusts on the lower block edge are also caused.

In FIG. 6, the central axis of the two roller shells 12 is about 10 ° behind when picking up the skewer edge 2 after the 3 stitch twisted at the bottom to the diagonal block axis. The radius I of the upper roll jacket caliber 12 pushes in the direction of the block edge . With the radius III of the lower caliber 12, the block surface is approached and thereby to the axis of the skewer edge 2 inclined pressure marks created.

From FIG. 7 it can be seen that after the 3 stitch, the middle. Axis of the edge rollers when picking up the skewer edge 2 is rotated by 12 ° upwards. When the rollers come together the radius III of the upper caliber 12 migrates to the center of the block and generates groove-shaped pressure marks on the surface of the block. At the same time, 12 impressions of impact marks are transferred from radius I of the lower caliber to the surface of the block.

8 shows the planar contact with the surface of the skewer edge 2 Contact areas 14 of the upper roll jacket caliber 12 after the 1st stitch. It can be seen that there are no bruises on the surface of the block or similar grooves Pressure marks can arise, while the unfavorable shape of the caliber becomes clear for comparison with the lower caliber 12.

With FIG. 9, the parallel areas 15 of the newly developed shape that lie inside in the roll jacket caliber 12 are square Block 2 shown after the 2nd stitch. The previous shape of the lower caliber 12 shows a significant difference in angle of around 12 °.

1o shows an approximately parallel and narrowest roller adjustment after the 3 stitch there is a considerable difference in dimensions of around 20 mm and an angle difference of around 13 °.

In FIG. 11, the canter axis is about 13 ° to the block axis twisted down. In the case of the tightest roll adjustment and strong canting of the rolls after the Zf inevitably the consequence at the block edges.

With FIG 12, the calibration of the roll jacket 12 with the three parallel contact areas 14> 15 and 16 according to the cross-sectional and caliber shapes of the block 2 of a skewer / square calibration of the bloom or 1st to 4th (5th) Stitch shown. The parallel areas 14 after the 1st roll pass with an opening angle of around 113 ° are located on the outside of the caliber of the roll mantle. For the bloom, as well as the 2nd and 4 · (5th) stitch, the parallel surface area 15 lies on the inside at around 92 °. The parallel area 16 after the 3rd stitch with around 107 ° is located in the middle of the roll jacket caliber 12.
The inner radius 17 is formed in connection with the inner contact surface 15 so that the block edge runs freely and does not run on the enlarged radius 17 of the roll jacket caliber 12 or the inner "radius 17 on the radius of the block edge and the contact pressure of the edge rollers so It is coordinated that the edges of the block cannot be crushed.

13 shows a section of the two roller jackets λΖ in the vertical piercing position when holding and guiding the block 2 with a skewer block cross-section.

- 1o -

With the parallel contact area 11f lying on the outside of the caliber of the roll mantle 12, the Spike edge 2 gripped, raised by 90 ° and brought into the piercing position shown for the 2nd stitch.

With FIG 14, the square 2 after the 2nd stitch and before Tap for the 3 stitch between the two guide surfaces 15 held, the parallel areas being in the caliber of the roll jacket 12 on the inside.

In FIG. 15, the skewer edge 2 is after the 3 · stitch and before the if. Stitch in the parallel areas 16 in the middle of the roll jacket caliber 12 led.

16 shows the square 2 after the ^. and before the 5 stitch and is held in the parallel surface areas 15 in a vertical position for the piercing.

- blank page -

Claims (1)

SUBSEQUENT PATENT CLAIMS • Cant rollers with an independent self-propulsion as well "radial caliber rotations a-roll cover for manipulation of blocks or rolling stock, characterized in that dxe different opening angles of the contact surfaces of the roll mantle parallel one, every roll pass It the "» * «« "· * - borrowed block or rolled cross-sections of a stitch sequence on the Caliber roller is adapted and thereby pinches «nd. Thrusts on the surface of the block or rolled material occur on the finished rolled profile as surface defects and lead to rejects or rework, can be avoided. 2. edger roll according to claim 1, characterized in that, for a skewer / square calibration the P · * · "· ¹ » Contact areas of the two spit-edge cross-sections of the 1 stitch with an opening angle of about 113 a- over the outer roll mantle and the 3rd stitch with approx , 07 ° in the center of the caliber - as well as the three square cross sections r the _2nd , k. and ₅ . Stitch, it approx. 92 °, the caliber women lie
3. Edging roll according to claim 1, characterized in that the two roles can be moved so closely together, so too smaller block cross-sections of a stitch sequence in the parallel contact surfaces of the roll mantle precisely guided can be. Edge roller according to claim 1, characterized in that * 'the inner radius of the roller jacket 17 is large and in connection tion with the opening angle 15 .0 formed xst, so that the smaller edge radii of the rolling stock do not run against the radius 17 of the roll mantle. - 12 - 5. cant rollers according to claim 1, characterized in that the two outer radii 18 are formed as large as possible are. 6. edging roll according to claim 1, characterized in that a heat-resistant steel, wear-resistant, with a adequate hardening of the hardening and tempering is used. 7. edger roll according to claim 1, characterized in that one per se for fastening the edger roll in the swivel arm known support structure is used, in addition to a sufficient attachment, a slight loosening and a enabled quick change of the cant roll ·· 8. Kanter roller according to claim 1, characterized in that the independent drive of the Kanter rollers with the Drive of the roller table rollers can be switched synchronously or concurrently.