CN115193947A

CN115193947A - Online repairing method for abrasion of rolling machine movable end of rolling machine for steckel mill curling furnace

Info

Publication number: CN115193947A
Application number: CN202210829089.7A
Authority: CN
Inventors: 孙京钢; 于兴; 刘立业; 孙硕
Original assignee: Yantai Boluwei Intelligent Control Technology Co ltd
Current assignee: Yantai Boluwei Intelligent Control Technology Co ltd
Priority date: 2022-07-13
Filing date: 2022-07-13
Publication date: 2022-10-18

Abstract

The invention relates to an on-line repairing method for abrasion of a rolling machine movable end of a rolling machine for a rolling furnace of a steckel mill, which comprises the following steps: (1) Manufacturing a repairing plate, wherein an arc-shaped groove is formed in the repairing plate, the inner diameter of the arc-shaped groove is matched with the outer diameter of the mandrel, a first clamping groove is formed in the arc-shaped groove of the repairing plate, and the size of the first clamping groove is matched with the size of a worn positioning key on the mandrel; (2) And mounting, namely clamping the first clamping groove of the repairing plate on the positioning key on the mandrel, and fixing the repairing plate on the movable flange. The invention solves the technical problem that the mandrel can not drive the drum body to stably rotate in the circumferential direction after abrasion occurs.

Description

Online repairing method for abrasion of rolling machine movable end of rolling machine for steckel mill curling furnace

Technical Field

The invention relates to an on-line repairing method for abrasion of a movable end of a coiler for a coiler of a steckel mill, belonging to the technical field of hot rolling equipment.

Background

The steckel mill is a steel plate mill, a coiling machine in a furnace is arranged in front of and behind a main rolling mill of the steckel mill, and in the rolling process of a steel plate, after the steel plate is rolled to reach the required thickness, the steel plate is coiled on a coiling block body of the coiling machine in the furnace for heat preservation so as to reduce the temperature reduction speed of the steel plate in rolling. The reel body that batches the steel sheet and use drives its rotation work through the dabber, and the reel body includes expansion end and stiff end, and the stiff end and the dabber of the reel body are together fixed, because the reel body work is under 950 ~ 1000 ℃ high temperature environment, when the reel body and dabber are heated the back and are stretched or receive the cold shrink, can appear dragging deformation phenomenon between the reel body and the dabber, in order to eliminate expend with heat and contract with cold effect to the influence of the reel body and dabber, will usually the expansion end of the reel body passes through the navigation key and is connected with the dabber. However, if roll body when the rolling machine rolls the in-process of steel sheet at the curling, perhaps when the curling steel sheet of high load, all can produce unbalanced force or moment, and expand with heat and contract with cold and produce concertina movement along the axis direction between the roll body that the effect made and the dabber, finally all can lead to producing wearing and tearing between flange and the navigation key of roll body expansion end, reach certain degree when flange or navigation key wearing and tearing, when the dabber drives roll body and rotates in circumference, relative motion can appear between roll body and the dabber, the unable steady drive roll body rotation of final dabber, influence the normal work of rolling machine.

At present, the repair mode of shutdown replacement is adopted, the repair mode needs to firstly shut down and off-line equipment, wait for the equipment to be cooled, respectively disassemble worn flanges and/or positioning keys from a coiling block body and a mandrel of a coiling block body of a steckel mill, finally install new flanges and/or positioning keys, and has long repair time due to the shutdown replacement and serious influence on the production progress.

Disclosure of Invention

The present invention aims to provide a new technical solution to improve or solve the technical problems of the prior art as described above.

The technical scheme provided by the invention is as follows: the utility model provides an online restoration method of rolling machine expansion end wearing and tearing for steckel mill curling furnace, includes the reel body and dabber, the dabber runs through the reel body and sets up on the axis of the reel body, the reel body includes stiff end and expansion end, the stiff end of the reel body be equipped with dabber fixed connection's welding flange, the expansion end of the reel body is equipped with movable flange, the spindle is close to movable flange's one end is equipped with the navigation key, be equipped with the second draw-in groove on the movable flange, movable flange passes through the second draw-in groove with the spindle on the navigation key cooperation is connected, still includes the restoration board, utilize the method of the online restoration rolling machine book of restoration board as follows:

(1) Manufacturing a repairing plate, wherein an arc-shaped groove is formed in the repairing plate, the inner diameter of the arc-shaped groove is matched with the outer diameter of the mandrel, a first clamping groove is formed in the arc-shaped groove of the repairing plate, and the size of the first clamping groove is matched with the size of a worn positioning key on the mandrel;

(2) And mounting, namely clamping the first clamping groove of the repairing plate on the positioning key on the mandrel, and fixing the repairing plate on the movable flange.

Further, the repair plate is arc-shaped, fan-shaped or square.

Furthermore, two repairing plates are manufactured in the step (1), and the two repairing plates are connected end to form a circular ring sleeved on the mandrel.

Further, the repair plate is made of 40 chromium steel or stainless steel.

Furthermore, two ends of the mandrel are supported by bearing seats.

Furthermore, the thickness of the repair plate is 60-200 mm.

Furthermore, the number of the positioning keys is two, and the two positioning keys are symmetrically arranged along the radial direction of the mandrel and relative to the axis of the mandrel.

Further, the repair plate is fixed on the movable flange through a welding mode.

The beneficial effects of the invention are: when producing wearing and tearing between the flange of barrel movable end and the navigation key, can appear the clearance between the second draw-in groove of spindle navigation key and loose flange, when the dabber drove barrel and rotate in circumference, relative motion can appear between barrel and the dabber, and the key-type connection between barrel and the dabber appears becoming flexible promptly, and the dabber can not continue to drive barrel steady rotation. By adopting the repairing method, the repairing plate is fixed on the movable flange, and the first clamping groove on the repairing plate is clamped on the positioning key of the mandrel, so that the fit clearance between the mandrel and the movable flange caused by abrasion is eliminated, the repairing plate has the effect of preventing the positioning key from being matched with the movable flange to be loosened, the repairing can be completed on line in the idle period of equipment shutdown without disassembling and repairing, the problem of relative motion between the winding drum body of the winding drum machine and the mandrel caused by abrasion along the circumferential rotation is solved, the mandrel can continue to drive the winding drum body to rotate stably, the repairing efficiency is improved, the repairing time is shortened, and the operation repairing cost is saved.

Drawings

FIG. 1 is a schematic view of the mandrel and mandrel combination of the present invention;

FIG. 2 is a schematic structural view of the mounting of the movable flange and the welding flange of the present invention;

FIG. 3 is a view of the projection from the direction A in FIG. 2 according to the present invention;

FIG. 4 is an enlarged view of the structure at E in FIG. 3 according to the present invention;

FIG. 5 is a schematic view of the structure of the repair plate of the present invention;

FIG. 6 is a schematic view of a repair plate according to the present invention;

FIG. 7 is a front view of FIG. 6 of the present invention;

FIG. 8 is a right side view of FIG. 7 of the present invention;

FIG. 9 is an enlarged view of the structure of FIG. 8 at F according to the present invention;

FIG. 10 is a schematic structural diagram of a second embodiment of the present invention;

fig. 11 is a schematic structural view of a second repair plate according to a second embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a third embodiment of the present invention;

in the figure, 1, a reel body; 101. a first flange mounting portion; 1011. welding a flange; 102. a second flange mounting portion; 1021. a movable flange; 2. a mandrel; 3. a positioning key; 4. repairing the plate; 401. an arc-shaped slot; 402. a first card slot; 403. a second card slot; 5. and the bearing seat supports.

Detailed Description

The principles and features of this invention are described below in conjunction with examples, which are set forth to illustrate, but are not to be construed to limit the scope of the invention.

The first embodiment is as follows:

as shown in fig. 1 to 9, a specific embodiment discloses an online repair method for abrasion of a movable end of a winding drum for a rolling furnace of a steckel mill, including a winding drum body 1 and a mandrel 2, wherein the mandrel 2 penetrates through the winding drum body 1 and is arranged on an axis of the winding drum body 1, the winding drum body 1 includes a fixed end and a movable end, the fixed end of the winding drum body 1 is provided with a welding flange 1011 fixedly connected with the mandrel 2, the movable end of the winding drum body 1 is provided with a movable flange 1021, one end of the mandrel 2 close to the movable flange 1021 is provided with a positioning key 3, the movable flange 1021 is provided with a second clamping groove 403, the movable flange 1021 is connected with the positioning key 3 on the mandrel 2 in a matching manner through the second clamping groove 403, more specifically, as shown in fig. 1 to 3, the fixed end of the winding drum body 1 is provided with a first flange mounting portion 101, the movable end of the winding drum body 1 is provided with a second flange mounting portion 102, the first flange mounting portion 101 of the winding drum body 1 is connected with a welding flange 1011 through a bolt, the center of the welding flange 1011 is provided with a through-hole for the through which the winding drum body 2 passes through the sleeve, and the mandrel 2 is welded to the mandrel 2 and is connected with the mandrel 2 in a manner after the mandrel 2; the other end of the mandrel 2 is provided with one or more key slots, in this embodiment, the number of the key slots is two, the two key slots are symmetrically arranged along the radial direction of the mandrel 2 with respect to the axis of the mandrel 2, positioning keys 3 are installed in the key slots, a movable flange 1021 is fixed on the second flange installation portion 102 of the winding drum body 1, a through hole is formed in the center of the movable flange 1021, second clamping grooves 403, the number of which is matched with that of the positioning keys 3, are formed in the side wall of the through hole, in this embodiment, the number of the second clamping grooves 403 is two, and after the movable flange 1021 is sleeved on the mandrel 2, the second clamping grooves 403 of the movable flange 1021 are clamped on the positioning keys 3 of the mandrel 2; the movable end of the winding drum body 1 is matched with the second clamping groove 403 through the positioning key 3, so that the mandrel 2 can drive the winding drum body 1 to rotate in the circumferential direction, and when the winding drum body 1 or the mandrel 2 is heated and elongated, the winding drum body 1 and the mandrel 2 cannot be pulled; however, if the reel body 1 of the reel machine encounters a large impact effect in the process of coiling the steel plate, or during the high-load coiling of the steel plate, an unbalanced force or a moment can be generated, and the reel body 1 and the mandrel 2 which are caused by the effects of expansion with heat and contraction with cold produce a telescopic motion along the axis direction, and finally the movable flange 1021 and the positioning key 3 at the movable end of the reel body can be worn away, and when the movable flange 1021 or the positioning key 2 are worn away to a certain extent, the mandrel 2 drives the reel body 1 to rotate in the circumferential direction, relative motion can occur between the reel body 1 and the mandrel 2, and finally the mandrel 2 can not stably drive the reel body 1 to rotate, so that the normal operation of the reel machine is affected.

As shown in fig. 5, the online repair method for the wear of the free end of the coiler for the coiler of the steckel mill further comprises a repair plate 4, and the online repair method comprises the following steps:

(1) Manufacturing a repairing plate 4, wherein an arc-shaped groove 401 is formed in the repairing plate 4, the inner diameter of the arc-shaped groove 401 is matched with the outer diameter of the mandrel 2, a first clamping groove 402 is formed in the arc-shaped groove 401 of the repairing plate 4, and the size of the first clamping groove 402 is matched with the size of the worn positioning key 3 on the mandrel 2;

(2) And mounting, namely after the first clamping groove 402 of the repairing plate 4 is clamped on the positioning key 3 on the mandrel 2, fixing the repairing plate 4 on the movable flange 1021. The mode that repair plate 4 is fixed to movable flange 1021 can be selected according to the operating mode, preferably through the welded mode, of course, also can be through bolted fixation, can also be through modes such as interference fit.

It should be noted that, in the present invention, the online repair is performed when the movable end of the coiler for the rolling mill coiler is worn, after the wear occurs, the size of the positioning key 3 of the mandrel 2 may become smaller or/and the size of the second locking groove 403 of the movable flange 1021 may become larger, a fit gap may occur between the positioning key 3 on the mandrel 2 and the second locking groove 403 of the movable flange 1021 (as shown in fig. 4), when the mandrel 2 drives the rolling body 1 to rotate in the circumferential direction, the rolling body 1 and the mandrel 2 may move relatively, and the size of the first locking groove 402 formed in the arc-shaped groove 401 of the repair plate 4 in the step (1) is adapted to the size of the worn positioning key 3 on the mandrel 2.

In addition, in the present embodiment, the repair plate 4 is circular arc-shaped, but the repair plate 4 may also be in other shapes, such as fan-shaped or square.

The repair plate 4 is made of 40 chromium steel, and the 40 chromium steel is one of the most widely used alloy structural steels in the mechanical manufacturing industry, and has good performances of wear resistance, chemical corrosion resistance, tearing resistance, high bearing capacity, shock absorption, buffering and the like. The thickness of the repair plate 4 is 60mm to 200mm, preferably 90mm. Of course, other materials, such as stainless steel, may be used to manufacture the repair plate 4, and it is obvious to those skilled in the art that the material of the repair plate 4 may be selected according to specific conditions.

By adopting the repairing method, the first clamping groove 402 on the repairing plate 4 is clamped with the positioning key 3 on the mandrel 2, and then the repairing plate 4 is fixed on the movable flange 1021, so that the fit clearance (shown in figure 9) generated by abrasion between the mandrel 2 and the movable flange 1021 is eliminated.

The second embodiment is as follows:

as shown in fig. 10 and 11, in a different embodiment from the first embodiment, two circular arc repair plates 4 are manufactured, and the two circular arc repair plates 4 are connected end to form a circular ring sleeved on the mandrel 2. The two repairing plates 4 can increase the connecting axial connecting strength of the reel body 1 and the mandrel 2.

The third concrete embodiment:

as shown in fig. 12, unlike the first embodiment, two ends of the mandrel 2 are supported by bearing seats 5, so as to ensure smooth rotation of the mandrel 2.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides an online repair method that steekle mill curling furnace used the rubbing of reel machine expansion end, includes reel body (1) and dabber (2), dabber (2) run through reel body (1) and set up on the axis of reel body (1), reel body (1) includes stiff end and expansion end, the stiff end of reel body (1) be equipped with dabber (2) fixed connection's welding flange (1011), the expansion end of reel body (1) is equipped with loose flange (1021), the dabber (2) go up the one end that is close to loose flange (1021) is equipped with navigation key (3), be equipped with second draw-in groove (403) on loose flange (1021), loose flange (1021) through second draw-in groove (403) with navigation key (3) cooperation connection on dabber (2), its characterized in that still includes repair plate (4), the online repair method as follows:

the method comprises the following steps that (1) a repairing plate (4) is manufactured, an arc-shaped groove (401) is formed in the repairing plate (4), the inner diameter of the arc-shaped groove (401) is matched with the outer diameter of a mandrel (2), a first clamping groove (402) is formed in the arc-shaped groove (401) of the repairing plate (4), and the size of the first clamping groove (402) is matched with the size of a worn positioning key (3) on the mandrel (2);

(2) And mounting, namely fixing the repairing plate (4) on the movable flange (1021) after the first clamping groove (402) of the repairing plate (4) is clamped on the positioning key (3) on the mandrel (2).

2. The on-line repairing method of the wear of the movable end of the coiler for a steckel mill coiler according to claim 1, characterized in that said repairing plate (4) is arc-shaped, fan-shaped or square.

3. The on-line repairing method for the wear of the movable end of the coiler for the curling furnace of the steckel mill according to claim 2, wherein two repairing plates (4) are manufactured in the step (1), and the two repairing plates (4) are connected end to form a circular ring sleeved on the mandrel (2).

4. The on-line repairing method of the wear of the movable end of the coiler for a steckel mill coiler furnace according to any of the claims 1 to 3, characterized in that said repair plate (4) is made of 40 chromium steel or stainless steel.

5. The on-line repairing method of the wear of the free end of the coiler for a steckel mill coiler furnace according to claim 4, characterized in that both ends of the mandrel (2) are supported (5) by bearing blocks.

6. The on-line repairing method of the abrasion of the movable end of the coiler for the steckel mill coiler furnace according to claim 1, characterized in that the thickness of the repair plate (4) is 60mm to 200mm.

7. The on-line repairing method for the wear of the movable end of the coiler for the steckel mill coiler furnace according to claim 1, characterized in that the number of said positioning keys (3) is two, and two of said positioning keys (3) are symmetrically arranged with respect to the axis of the mandrel (2) in the radial direction of the mandrel (2).

8. The on-line repairing method of the wear of the movable end of the coiler for a steckel mill coiler furnace according to claim 1, characterized in that the repairing plate (4) is fixed to the movable flange (1021) by means of welding.