KR100246827B1 - Bowing correction apparatus for temper rolling mill - Google Patents

Abstract

Provided is a warpage adjusting device for a temper rolling mill that can easily adjust the up and down deflection of the tin plate disc.

The deflection adjustment auxiliary rolls 11, the deflector rolls 13, the deflector rolls 14, and the deflection adjustment auxiliary rolls 12 are alternately arranged on the upper and lower surfaces of the tin plate discs 3a along the advancing direction of the tin plate discs 3a. do.

Description

Bending control device of temper rolling mill

The present invention relates to a warpage adjusting device of a temper rolling mill.

In the temper rolling of the original plate (cold rolled steel sheet), a temper rolling machine composed of two stands is generally used. By the way, since the plate | board thickness of the tin plate disk is 0.15-0.60 mm thin, it is easy to produce curvature in a temper rolling process.

As an apparatus for adjusting this warp, the thing of Unexamined-Japanese-Patent No. 6-245 is known, for example.

As shown in FIG. 4, the apparatus is a cold rolled steel sheet d between a work roll b of a stand a and a bridle roll c disposed on an outlet side of the work roll b. It has two bending adjustment auxiliary rolls (e, f) which can be lifted apart from each other along the advancing direction of the cold rolled steel sheet by changing the intermesh by raising and lowering each of the bending adjustment auxiliary rolls (e, f). The up and down deflection of L deflection (length warpage) and c warpage (width warpage) of (d) is adjusted.

Here, for example, the intermesh of the auxiliary roll for bending adjustment (e) is passed in contact with the two rolls before and after the roll (e), that is, the work roll (b) and the bending adjustment auxiliary roll (f) in the traveling direction of the steel sheet. With respect to the line which the steel plate passes when a steel plate is assumed, the distance (length: mm) in which the vertex of the contact part with the steel plate of the roll (e) intrudes in an up-down direction is called.

By the way, when installing the two bending adjustment rolls (e, f) between the work roll (b) and the bridal roll (c), usually, the auxiliary roll (e) for bending adjustment on the work roll (b) side. Is placed on the lower surface side of the cold rolled steel sheet d, and the auxiliary roll f for bending adjustment on the bridle roll c side is placed on the upper surface side of the cold rolled steel sheet d, and the cold rolled steel sheet d is wound.

In such a bending adjustment device, the bending adjustment auxiliary roll (e) on the work roll (b) side is lifted to perform the bending adjustment, so that one intermesh, that is, the working roll (b) and the adjustment auxiliary roll (f) When the intermesh of the bending adjustment auxiliary roll (e) is changed, the winding angle of the cold rolled steel sheet (d) of the bending adjustment auxiliary roll (f) changes so that the other intermesh, that is, the bending adjustment auxiliary roll (e) and the bridle roll The intermesh of the auxiliary roll f for curvature adjustment with respect to (c) changes. In other words, the winding angle of the cold rolled steel sheet of the auxiliary roll for bending adjustment e changes, and the winding angle of the cold rolled steel sheet of the auxiliary roll for bending adjustment changes.

As a result, there was a problem that adjustment of the vertical warpage of the cold rolled steel sheet d was difficult.

Moreover, in a thin cold rolled sheet steel, some curvature becomes a problem. For example, in the case of a steel sheet for cans, since the printing is performed on the surface of the tin plated steel sheet, the allowable range for bending of the steel sheet is extremely strict. For example, the subject is a sheet having a length of 800 mm and a product width of 850 mm. The warp is measured in a suspended state (when the sheet is laid flat, the warpage cannot be measured due to its own weight). If the width center part becomes 12 mm concave with respect to the sheet width direction, it is judged impossible. There was a problem that it was difficult to precisely adjust some warpage to meet such demand.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a warpage adjusting device for a cold tempered rolling mill that can accurately adjust the warp of the cold rolled steel sheet.

1 is a schematic side view of a cold rough rolling machine having a bending adjustment device of an embodiment of the present invention.

2 is a graph showing the relationship between the two cases where the deviation (σ) (standard deviation) of one deflection amount occurring in the base plate is taken as the longitudinal axis, and the values of L ₁ / D and L ₅ / D are horizontal axes.

3 shows the values of L ₂ / D and L ₄ / D in the vertical axis, and the values in L ₁ / D and L ₅ / D in the horizontal axis, respectively. L ₂ 3D, 1.5D L ₄ 3D, L ₁ 3D, L ₅ A graph showing the range satisfying the 3D relationship in diagonal lines.

Figure 4 is an explanatory side view for explaining the deflection adjustment device of a conventional cold roughing mill.

<Description of the symbols for the main parts of the drawings>

1: temper rolling mill 3a: tin plate disc (cold rolled steel sheet)

6: work roll 7: bending adjustment device

8: bridle roll 11, 12: auxiliary roll for bending adjustment

13, 14: deflector roll 15, 16: lifting device

In order to achieve this object, the warpage adjusting device of the temper rolling mill according to the first aspect (claim 1) of the present invention is the advancement of the steel sheet between the work roll and the bridle roll disposed on the outlet side of the work roll. In the bending adjustment apparatus of the tempered rolling mill equipped with the two bending adjustment auxiliary rolls which are spaced apart from each other in the direction, and adjusting the bending of the said cold rolled steel plate wound by each bending adjustment auxiliary roll by elevating each bending adjustment auxiliary roll, A plurality of deflector rolls for changing the advancing direction of the cold rolled steel sheet are fixed and installed between the two deflection adjusting auxiliary rolls, and the respective deflection adjusting auxiliary rolls and the deflector rolls are arranged along the advancing direction of the cold rolled steel sheet. Place alternately on top and bottom of each other.

Warp adjusting apparatus of the crude rolling mill according to a second aspect (claim 2) of the present invention, the center-to-center horizontal distance from the work the warp-adjusting sub-roll and the work the deflector roll of rolcheuk of rolcheuk L _2, said bridle when the center-to-center horizontal distance from the deflection roll and the auxiliary adjusting the bridle rolcheuk the deflector roll of the rolcheuk to L _4, the roll diameter of the warp-adjusting sub-roll to D, 1.5 L ₂ / D 3, 1.5 L ₄ / D Satisfy the relationship of 3.

Warp adjusting apparatus of the crude rolling mill according to a third aspect (claim 3) of the present invention, the center-to-center horizontal distance between the work roll and the work the warp-adjusting sub-roll of rolcheuk L _1, the bridle roll and the bridle L ₁ / D when the horizontal distance between the centers of the roll adjusting side with the auxiliary roll for bending adjustment is L ₅ and the roll diameter of the auxiliary roll for bending adjustment is D 3, L ₅ / D Satisfy the relationship of 3.

In the invention of the first aspect (claim 1) of the present invention, a plurality of deflector rolls are fixed and provided between two auxiliary rolls for deflection adjustment, and each roll is alternately disposed on the upper and lower surfaces of the steel sheet along the traveling direction of the steel sheet. To place. As a result, the auxiliary roll for bending adjustment on the work roll side or the bridle roll side is raised and lowered so that the other intermesh does not change even if one intermesh is changed.

In other words, the winding angle of the cold rolled steel sheet of the other bending adjustment auxiliary roll does not change so that the change of the intermesh by each bending adjustment auxiliary roll can be performed independently. In addition, two deflector rolls are normally sufficient, but the same effect is exhibited even more.

In the invention according to the second aspect (claim 2) of the present invention, in addition to the invention according to the first aspect described above, 1.5 L ₂ / D 3, 1.5 L ₄ / D By satisfy | filling the relationship of 3, the space | interval of the auxiliary roll for deflection adjustment and a deflector roll on the work roll side, and the space | interval of the adjustment auxiliary roll and deflector roll on the bridle roll side shall be appropriate.

That is, when L ₂ / D (L ₄ / D) is less than 1.5, the distance between the deflection adjustment auxiliary roll and the deflector roll becomes narrow, and it becomes difficult to attach a lifting device for elevating the auxiliary roll to the bending adjustment auxiliary roll. When L ₂ / D (L ₄ / D) is greater than 3, the distance between the deflection roll and the deflector roll becomes wider, and the lift rolls are lifted when the predetermined intermesh is obtained. The stroke increases, and as a result, a large lifting device is required, resulting in a surge in equipment costs.

In the invention according to the third aspect (claim 3) of the present invention, in addition to the invention according to the first aspect or the second aspect, L ₁ / D Bending to one side of the cold rolled steel sheet caused by misalignment of orthogonality and parallelism between work rolls regularly exchanged and the work rolls on the side of the work rolls being satisfied by satisfying the relationship of 3 (rolls for adjustment of warpage) The difference between the L bending on the operating side and the L bending on the driving side) and the amount of warpage are reduced so that the bending adjustment operation by the auxiliary auxiliary roll for bending adjustment can be performed more accurately. Another L ₅ / D Bending or warping to one side of cold rolled steel produced by misalignment of orthogonality and horizontality between the bridle roll and the auxiliary roll for bending adjustment on the bridle roll side due to the fixed accuracy of the bridle roll by satisfying the relation of 3 By reducing the amount of, the bending adjustment work by the auxiliary roll for adjusting the bending is more accurate.

In other words, when L ₁ / D is less than 3, the distance between the work roll and the auxiliary roll for bending adjustment on the work roll is narrowed, and the influence of the misalignment is increased. As a result, the bending or warping of one side of the cold rolled steel sheet Since the quantity becomes large, the bending adjustment work by the auxiliary roll for bending adjustment becomes difficult. If the L ₅ / D is less than 3, the distance between the bridle roll and the auxiliary roll for bending adjustment on the bridle roll is narrowed, and the influence of the misalignment is increased. This becomes large, and the bending adjustment work by the auxiliary roll for bending adjustment becomes difficult.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3. 1 is a schematic side view of a cold temper rolling mill having a warpage adjusting device which is an embodiment of the present invention, FIG. 2 is a graph showing the relationship between the deflection amount σ to one side and L ₁ / D, L ₅ / D, and FIG. A graph showing the relationship between L ₂ / D, L ₄ / D, L ₁ / D, and L ₅ / D.

As shown in FIG. 1, the temper rolling mill 1 passes through the tension roll 2a through the tin plate disc 3 rewound from the coil of the payoff reel 2. 1 stand (4) and No. Cold rolling by the stand 5, and then the up and down bending (L bending, C bending) of the cold-rolled tin plate 3a (cold-rolled steel sheet). 2 Tension reel (not shown) is adjusted by the bridle roll 8 by adjusting the deflection adjustment device 7 provided on the outlet side of the work roll 6 of the stand 5 and adjusting the deflection. It is configured to wind). 1, reference numerals 9 and 10 denote backup rolls, respectively. Moreover, as a mill drive system, a work roll drive system or a backup roll system can be selected suitably.

Next, the bending adjustment apparatus 7 which is the summary of this invention is demonstrated.

Bending adjustment device 7 is no. Two auxiliary rolls 11 and 12 for adjustment of flexure provided between the work roll 6 of the stand 5 and the bridal roll 8 so as to be rotatable apart from each other in the advancing direction of the tin plate disc 3a. Has

The auxiliary rolls 11 and 12 for curvature adjustment can be raised and lowered at the same time. In this embodiment, the auxiliary roll 11 for bending adjustment on the work roll 6 side is arranged on the lower surface side of the tin plate disc 3a, and the auxiliary roll 12 for adjustment of bending on the bridle roll 8 side is made of tin plate. It is arrange | positioned at the upper surface side of (3a), respectively, and the tin plate original board 3a is wound. Lifting devices (15, 16) such as electric or hydraulic drive are attached to the bending adjustment auxiliary rolls (11, 12), respectively, and the bending adjustment auxiliary rolls (11, 12) can be individually lifted by the driving of each lifting device. have. By this elevating and lowering, the warpage adjustment auxiliary and the intermesh of (11, 12) are changed to adjust the L warpage and the C warpage (up and down warpage) of the base plate 3a.

Between the deflection adjustment auxiliary rolls 11 and 12, the two deflector rolls 13 and 14 which change the advancing direction of the tin plate disc 3a up and down are spaced apart from each other in the advancing direction of the tin plate disc 3a. It is.

Each deflector roll 13 and 14 is fixed and provided, respectively. In addition, in this embodiment, the roll diameter of each deflector roll 13 and 14 is made larger than the roll diameter of the auxiliary rolls 11 and 12 for deflection adjustment. And the deflector roll 13 on the work roll 6 side places the contact vertex with the tin plate original plate 3a on the upper surface of the tin plate original plate 3a below that of the auxiliary roll 11 for bending adjustment, The deflector roll 14 on the bridle roll 8 side has a lower contact point with the tin plate disc 3a on the lower surface of the tin plate disc 3a than that of the deflector roll 13 and the auxiliary roll 12 for bending adjustment. The base plate 3 is wound around the plate. As a result, the deflecting rolls 13 and 14 change the advancing direction of the base plate 3a up and down, and the auxiliary roll 11 for deflection, the deflector roll 13, the deflector roll 14, and the deflection adjustment The auxiliary rolls 12 are alternately arranged on the upper and lower surfaces of the tin plate original plate 3a along the advancing direction of the tin plate original plate 3a.

In this way, the two deflector rolls 13 and 14 are fixedly installed between the two deflection adjustment auxiliary rolls 11 and 12, so that the base plate 3a of the tin plate disc 3a is formed in each of the deflection adjustment auxiliary rolls 11 and 12. In adjusting up and down bending, even if one intermesh is changed by elevating the bending adjustment auxiliary roll 11 or the bending adjustment auxiliary roll 12, the other bending adjustment auxiliary roll 12 or the bending adjustment auxiliary roll 11 is changed. The winding angle of the tin plate 3a with respect to is not changed. As a result, the intermesh change by the bending adjustment auxiliary rolls 11 and 12 can be performed independently on the work roll 6 side and the bridal roll 8 side. It is possible to precisely adjust the upward and downward bending by.

Here, in the present embodiment, the horizontal distance between the centers of the rolls 11, 13, 14, and 12 for the deflection adjustment auxiliary roll 11 and the deflector roll 13 is set to L ₂ , and the auxiliary rolls 12 for the bending adjustment. When the horizontal distance between the center and the deflector roll 14 is L ₄ , and the roll diameters of the auxiliary rolls 11 and 12 for each bending adjustment are D, 1.5, L ₂ / D 3, 1.5 L ₄ / D It arrange | positions so that the relationship of 3 may be satisfy | filled, and the space | interval between each roll 11, 13, 14, and 12 is considered to be appropriate.

That is, when L <_2> / D is less than 1.5, when the said lifting device is attached to the bending adjustment auxiliary roll 11, the space | interval of the bending adjustment auxiliary roll 11 and the deflector roll 13 will become narrow, and its attachment will become difficult.

On the other hand, when L ₂ / D exceeds 3, the distance between the deflection adjustment auxiliary roll 11 and the deflector roll 13 becomes wider, and the elevating device at the time of elevating the bending adjustment auxiliary roll 11 to obtain a predetermined intermesh. The lifting stroke increases. As a result, a large lifting device is required, resulting in a surge in equipment costs.

Similarly, when L ₄ / D is less than 1.5, the interval between the bending adjustment auxiliary roll 12 and the deflector roll 14 becomes narrow when the above-mentioned lifting device is attached to the bending adjustment auxiliary roll 12, and the attachment thereof becomes difficult. . On the other hand, when L ₄ / D exceeds 3, the distance between the deflection adjustment auxiliary roll 12 and the deflector roll 14 becomes wider, and the lifting device lifts and lowers when a predetermined intermesh is obtained by lifting the auxiliary adjustment roll 12 for the bending adjustment. The stroke increases, and as a result, a large lifting device is required, resulting in an increase in equipment cost. So 1.5 like this L ₂ / D 3, 1.5 L ₄ / D By arranging the rolls 11, 13, 14, and 12 so as to satisfy the relationship of 3, attachment of the lifting device to each of the bending adjustment auxiliary rolls 11, 12 can be facilitated, and a small lifting device is required. It is possible to obtain an intermesh of, thereby lowering the equipment cost.

By the way, 2 The work roll 6 of the stand 5 is periodically replaced, but in this case, the orthogonality and parallelism between the work roll 6 and the bending adjustment auxiliary roll 11 due to the attachment accuracy during the replacement. Due to misalignment, warpage or distortion occurs to one side of the tin plate disc 3a. On the other hand, bending to one side of the base plate plate 3a by misalignment of orthogonality and parallelism between the bridle roll 8 and the bending adjustment auxiliary roll 12 due to the fixing accuracy of the bridle roll 8 Distortion occurs.

Therefore, when the space | interval of the work roll 6 and the deflection adjustment auxiliary roll 11, and the space | interval of the bridal roll 8 and the deflection adjustment auxiliary roll 12 become narrow, the influence of the said misalignment will become large. The amount of warpage and distortion to one side of the base plate 3a on the deflection adjustment auxiliary roll 11 side and the adjustment auxiliary roll 12 side caused by the misalignment becomes large. For this reason, even if the intermesh change by each bending adjustment auxiliary rolls 11 and 12 is made independently as mentioned above, each bending adjustment auxiliary roll ( It is difficult to adjust the vertical warpage of the tin plate 11a by 11 and 12).

Thus, in this embodiment, the horizontal distance between the center of the work roll 6 and the auxiliary roll 11 for bending adjustment is L ₁ , the horizontal distance between the center of the bridle roll 8 and the auxiliary roll 12 for bending adjustment. (L ₅ ), when the roll diameter of the auxiliary roll for bending adjustment is D, L ₁ / D 3, L ₅ / D The gap between the work roll 6 and the bending adjustment auxiliary roll 11 and the bridle roll 8 and the bending adjustment auxiliary roll 12 are set so as to satisfy the relationship of 3, and thus the work roll 6 side and The less the influence of misalignment on the bridal roll 8 side, the less.

In detail, FIG. 2 is experimental data carried out by the present inventors, and the deviation (σ) (standard deviation) of the deflection amount to one side occurring in the tin plate disc 3a is represented by the longitudinal axis, L ₁ / D, and L ₅ / D values. Is a graph showing the relationship between the two cases in the horizontal axis.

Here, as the roll diameters D of the auxiliary rolls 11 and 12 for each bending adjustment, the most common 165 mm, 209 mm, and 200 mm 3 in the temper rolling mill for processing the plated plate 3a with a plate thickness of 0.15 to 0.60 mm. Type was used.

As apparent from Fig. 2, when the values of L ₁ / D and L ₅ / D are less than 3 (L ₁ / D, L ₅ / D <3), any type of auxiliary rolls 11 and 12 for bending adjustment are Even when used, the gap between the work roll 6 and the deflection adjustment auxiliary roll 11 and the bridle roll 8 and the deflection adjustment auxiliary roll 12 become narrow, so that the influence due to misalignment is increased. The amount of warpage to deviates more than 3 mm.

On the other hand, L ₁ / D, is 3 or more values of _{L 5 / D (L 1 /} D, L 5 / D In 3), even when any type of bending adjustment auxiliary rolls 11 and 12 are used, the gap between the work roll 6 and the bending adjustment auxiliary roll 11 and the bridle roll 8 and the bending adjustment auxiliary roll ( The spacing with 12) became appropriate, and the influence by misalignment was reduced, and the amount of warpage to one side was less than 2 mm. Thus, in this way L ₁ / D 3, L ₅ / D By setting the interval between the work roll 6 and the bending adjustment auxiliary roll 11 and the space between the bridal roll 8 and the bending adjustment auxiliary roll 12 so as to satisfy the relationship of 3, the auxiliary roll for each bending adjustment roll In adjusting the up and down bending of the base plate 3a by (11, 12), the influence of the misalignment mentioned above is lessened, and the top and bottom bending adjustment of the base plate 3a by the each bending adjustment auxiliary rolls 11 and 12 is adjusted. This can be done more simply.

3 also shows the values of L ₂ / D, L ₄ / D in the vertical axis, and the values in L ₁ / D, L ₅ / D in the horizontal axis, and 1.5D L ₂ 3D, 1.5D L ₄ 3D, L ₁ 3D, L ₅ It is a graph which shows the range which satisfies the relationship of 3D with diagonal lines.

Incidentally, in this embodiment, the roll diameters of the auxiliary rolls 11 and 12 for bending adjustment are 200 mm, the roll diameters of the deflector rolls 13 and 14 are 300 mm, and L ₁ = 800 mm, L ₂ = 500 mm, L ₃ (horizontal distance between centers of the deflector roll 13 and the deflector roll 14) = 350 mm, L ₄ = 400 mm, L ₅ = 2600 mm.

As apparent from the above description, according to the invention of the first aspect (claim 1) of the present invention, since the intermeshing change by the two bending adjustment auxiliary rolls can be performed independently, the cold rolled steel sheet by each bending adjustment auxiliary roll The effect of being able to accurately adjust the vertical warpage of is obtained.

In the invention of the second aspect (claim 2) of the present invention, in addition to the invention of the first aspect, 1.5 L ₂ / D 3, 1.5 L ₄ / D By satisfying the relationship of 3, the lifting device can be easily attached to each of the bending adjustment auxiliary rolls, and a predetermined intermesh can be obtained from the small lifting device, thereby reducing the cost of equipment. Get

In the invention of the third aspect (claim 3) of the present invention, in addition to the invention of the first and second aspects, L ₁ / D 3, L ₅ / D By satisfying the relation of (3), the influence of misalignment due to the attachment accuracy of the work roll and the bridal roll, etc., when adjusting the vertical warpage of the cold rolled steel sheet by the respective bending adjustment auxiliary rolls, The effect that the up and down bending adjustment can be performed more accurately is obtained.

Claims (3)

Two adjustable lifting and lowering auxiliary rolls provided between the work roll 6 and the bridle roll 8 arranged on the outlet side of the work roll 6 in the advancing direction of the cold rolled steel sheet 3a. (11, 12) of the temper rolling mill (1) which adjusts the curvature of the cold rolled steel sheet (3a) wrapped around each warp adjusting auxiliary roll (11, 12) by elevating each warp adjusting auxiliary roll (11, 12). In the warpage adjusting device 7, a plurality of deflector rolls 13 and 14 for changing the traveling direction of the cold rolled steel sheet 3a are fixedly installed between the two warpage adjusting rolls 11 and 12. The bending adjustment of the temper rolling mill formed by alternately arranging the auxiliary rolls 11 and 12 and the deflector rolls 13 and 14 for the bending adjustments on the upper and lower surfaces of the cold rolled steel sheet 3a along the traveling direction of the cold rolled steel sheet 3a. Device. The horizontal distance between the centers of the deflection adjustment auxiliary roll 11 on the work roll 6 side and the deflector roll 13 on the work roll 6 side is L ₂ , the bridle. The horizontal distance between the deflection rolls 14 on the roll 8 side and the deflector rolls 14 on the bridle roll 8 is L ₄ , and the auxiliary rolls 11 and 12 for each warp adjustment. When roll diameter of D is 1.5 L ₂ / D 3, 1.5 L ₄ / D Bending adjustment apparatus of the temper rolling mill characterized by satisfy | filling the relationship of 3. 3. A method according to claim 1 or 2, wherein the work rolls (6) and that the work rolls (6) side of the center-to-center horizontal distance from the deflection adjusting sub-roll (11), L _1, of the bridle roll 8 time and to a roll diameter of bridle rolls (8) side of the warp-adjusting sub-roll (12) center-to-center horizontal distance L _5, each bending adjustment auxiliary rolls 11 and 12 with a D, L ₁ / D 3, L ₅ / D Bending adjustment device of the temper mill, characterized by satisfying the relationship of 3.