TW318800B - - Google Patents

Description

A7 B7 ° 188Q〇 Fifth, the description of the invention (1) Please read the precautions on the back and then fill this page. The present invention is about hot-rolling steel plate rolling equipment and its rolling method, in particular, it can be realized to be suitable for production. Speed, to carry out the production of hot-rolled strip, and to achieve the goal of saving energy, and hot-rolling steel plate rolling equipment and rolling methods using small-scale equipment. The leading representative hot-rolled steel sheet rolling equipment (hereinafter referred to as strip hot rolling mill) * For example, in "The latest hot rolled strip manufacturing technology in China J (Japan Iron and Steel Association Showa August 10, 62 Issue) Pages 1 76 and 305, and even page 3 1 0, it is stated that the production volume is 3 0 0 ~ 4 million tons / year, and the finishing rolling speed is 6 8 0 ~ 1 6 2 7m / mi η high-speed large-scale production rolling equipment: It is also described that when a flat steel blank with a thickness of 200 mm is rolled into a rough rolling mill with a thickness of 20-40 mm, a diameter of 1 000-1 300 mm is used. Working rollers, and finishing mills that roll steel strips of 20 to 40 mm into strips of 12 mm or less, use working rollers with a diameter of 600 to 800 mm. Central Ministry of Economic Affairs Printed by the consumer cooperative. In addition, recently, due to the development of the continuous casting method of thin flat steel blanks, flat steel blanks of about 50 mm have appeared; in this case, a rough rolling mill is not required, and only a finishing mill is used. Use these flat The production method of steel embryo is generally suitable for small-scale production. For example, in "Ein Jahr Betriebserfahrun-g mit der CSP-An 1 age fuer Warmbere i tband be i Nuco-r. Steel "(Stahl u. Eisen 111 (1991) Nr.l) showed 7K. Even if the production volume is 700,000 tons per year, its finishing mill group still inherits the advanced mode and is equipped with rolling mills with 5 to 7 rolling stands; the rolling speed at the exit of the finishing mill is 2.5 mm at the completion thickness. 300m / mi η is in accordance with the Chinese National Standard (CNS) Α4 specification (210Χ297mm) at the paper scale. It is printed by the consumer cooperation of the Central Standards Bureau of the Ministry of Economy. 丄 8 3 0 Q A7 B7 5. Description of the invention (2) At a full thickness of 1.6 mm, it is a high speed of 600 m / mi η or more. In addition, the diameter of the rolls used in the operation of the finishing mill inherits the previous size and is 760 to 800 mm. On the other hand, it is proposed in Japanese Unexamined Patent Publication No. 6-3 2 0 2 0 2 that from the perspective of the relationship between the required production volume and the highest speed of the equipment or from the point of view of saving resources, it is based on the use of small A new concept of production method for the advantages of rolls for caliber operations. Figure 1 shows that when a flat steel blank with a thickness of 200 mm is rolled into a hot-rolled strip with a thickness of 2 mm, the finishing mill uses 800 mm and 360 mm work rolls for rolling , The comparison of energy requirements. From this, it can be seen that 'small-diameter rolls are more energy-efficient. Then, the technology described in the same gazette basically uses a small-diameter work roll for the finishing stage without hindrance during biting: the intermediate roll or the auxiliary roll is used to drive the work roll. Indirect driving method; the use of the strong squeezing and pressing caused by the small diameter operation roll can prevent the temperature of the rolled material from falling. In addition, the improvement of the deformation efficiency of the rolled material caused by the use of small-diameter work rolls can be used to achieve the effect of saving energy. In addition, Japanese Patent Application Laid-Open No. 5 4-14 9 3 5 6 describes that when the front end of the material to be rolled comes into contact with rolling and the front end has a loop-shaped bending portion, the bending portion The rear part is limited to the up and down direction to prevent the rolled material from retreating; from the up and down direction, the loop-shaped bending portion is pressed to advance the front end of the rolled material to be bitten into it Roll gap device. The size of this paper is applicable to the Chinese National Standard (CNS) Α4 specification (210X 297mm) ί (please read the precautions on the back before filling in this page) Order Λ ^ 18800 A7 B7 5. Description of the invention (3) However, in the above special The use of small-diameter rolls described in Kai Ping 6-3 2 0 2 0 2 is restricted due to biting; although it is applied in the front stage of finishing, it is also naturally limited by the roll placement. Therefore, in this publication, when a small-diameter work roll is used for finishing the first rolling stand, a front-end thickness reduction device for reducing the thickness of the front end of the plate before rolling is provided. In addition, when using small-diameter work rolls, the torque generated by the main shaft has a limit in transmission. Therefore, the intermediate rolls or auxiliary rolls are used for indirect driving. In this case, a friction coefficient equal to or higher than the friction coefficient required for biting must be provided between the work roll and the intermediate roll or the auxiliary roll. However, during actual rolling, a 100% guarantee cannot be given for this. Therefore, there is a possibility of slippage between the rolls. On the other hand, the hot rolling oil that can reduce the friction coefficient between the plate and the working rolls and reduce the rolling load and rolling power cannot be compared with the previous large diameter. The biting conditions of the working roll are used for coating. The Ministry of Economic Affairs, Central Bureau of Economics and Social Affairs and Consumer Cooperation Du Duan (Please read the precautions on the back before filling out this page) Therefore, hot rolling oil or lubricating oil between rolls cannot fully exert the effect. The back-off prevention device and loop-shaped extrusion device of Japanese Patent Laid-Open No. 5 4-1 4 9 3 5 6 restrict the rolled material to the up and down direction: in order to restrict the rolled material, only It has cold rolling equipment that can store the rolled material, and the device for storing the rolled material can stop the rolled material at the entrance of the rolling machine, or it can be used repeatedly Single-roll rolling machine for secondary rolling; This paper scale is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm). Printed by the Central Consumers ’Bureau of the Ministry of Economic Affairs of the Employees Consumer Cooperative ° L88〇〇ΑΊ _Β7_ V. Description of invention ( 4) In the case where the material to be rolled is continuously produced by a continuous production machine, it cannot use the tandem rolling with multiple rolling machines. The purpose of the present invention is to solve the problems of the above-mentioned prior art, and to provide rolling equipment that can improve the production efficiency of rolled materials' and at the same time can achieve the goal of saving energy. Multiple rolling mills, hot rolling equipment for rolling hot sheet metal; the aforementioned rolling mill with working rolls can be used to provide a ramp plate on the rolling line of the hot sheet material The guide member, and the guide member provided near the through plate, and used to hold down the floating of the hot plate, can be raised and lowered to the desired position and roll to achieve the above purpose. Using this, when using a rolling mill with a small-diameter work roll to roll the hot-rolled sheet *, the hot-rolled sheet is a guide member for a through plate provided above and below the rolling line. It is guided to the small-diameter work roll; however, when the hot-rolled sheet is bitten by the work roll, it will bend upward due to the reaction force. • For this problem, it is installed on the through plate Use the elevating roller near the guide member to raise and lower the hot room plate guided by the guide member for the through plate to the desired position, and hold the hot room plate by pressing, so that the hot room plate has The reaction force received by the working rolls also has a greater squeezing force * and is trapped by the small-diameter working rolls. With its roll balancing device that can apply contact force between the rolls for small-diameter operations and the rolls for intermediate rolls, the above purpose can be achieved. This paper standard is applicable to the Chinese National Standard (CNS) A4 specification (210 × 297 mm). (Please read the "Notes on the back" section before filling in this page) Order -7 -7-Printed by the Consumer Standards Department of the Ministry of Economic Affairs of the Ministry of Economy ^ 18800 A7 _B7_ 5. Description of the invention (5) Use this to bite into the hot room In the case of a sheet material, torque can be surely transmitted to the roll for small-diameter operations, and biting of the sheet material using the roll for small-diameter operations can be reliably performed. In addition, the above object can also be achieved by having a pair of work rolls and reinforcement rolls, as well as four-stage rolls with a device that can disperse hot rolling oil on the work rolls; the aforementioned roll mill with work rolls Use, the guide member for the through plate which is arranged above and below the rolling line of the plate, and is arranged near the guide member for the through plate to press the floating of the plate so that it can be raised and lowered to the desired The roll at the position guides the hot sheet between the rolls for hot work while distributing hot rolling oil to the rolls for the work to achieve the above purpose. With this, for large-diameter rolls used to distribute hot rolling oil, the guide plates for the hot plate to guide the hot plate and the pressing roller for pressing the hot plate are used to restrict the travel of the hot plate ; Because it can apply a greater pressing force to the hot plate than the reaction force received by the work roll, so even in the state of continuous distribution of hot rolling oil, the work roll can also be used , To bite between hot plates "As shown in Fig. 20, it is arranged at a position where it is lowered only by a certain value from the upper part of the working roll 3 i on the lower side of the rolling mill. In the following, the basic idea of the present invention will be explained by taking a rolling mill using rolls for small-diameter operations as an example. The first problem when using rolls for small-diameter operations * is biting. · In the bite of rolling, Ah is generally used as the shrinkage, R is the paper size of the half-roll of the roller, which is applicable to the Chinese National Standard (CNS) Λ4 specification (210X297mm). 8-(Please read the precautions on the back first (Fill in this page) · ιτ A7 B7 V. Description of the invention (6) Diameter, P is the rolling load, K is the rigidity of the rolling mill, and // is the friction coefficient between the roll and the plate

Ah = / z * 2 · R-P / K …… (1) Therefore * When the roll radius R becomes smaller, the bite shrinkage ΔΙι also becomes smaller, and bite failure occurs. In addition, the amount of shrinkage is determined by the balance of the horizontal force of the force of pulling the material in the roll in the roll bite zone * and the roll reaction force to squeeze back the rolled material. Now, when the rolled material is bitten from the bite angle 0 〇 * to 0, when calculating the horizontal force acting on the rolled material, 0〇-0 F 0 = Β · km · R. (00 -0) (--β) ...... (2) 2 Du-printed by the employee consumption cooperation of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling out this page). Here, it becomes F 0: The squeezing force of the rolled material, B: plate width, km: limit the average deformation resistance, R: radius of the working roll, 0 〇: bite angle, 0: angle of the front end position of the plate. This paper scale is applicable to the Chinese National Standard (CNS) A4 specification (210X297mm) -9-^ 18800 A7 B7 5. Description of the invention (7) If Μ is greater than (0 〇-0) / 2, then F0 becomes negative Value, the rolled material can be pulled in by the roller, but if it is smaller, it is squeezed back. The squeezing force is F 0. Therefore, if a force greater than the squeezing force F 0 is to be applied to the rolled material, the bite can be achieved when the radius of the roll is small or the friction coefficient is low. Now, in order to squeeze the rolled material to the part of the rolling mill, the required force, the required squeezing force is #, then by (2), and becomes

△ h = R. (^ + U2 * F / CB · km · R))) * 2-P / K (3) Please = read the notes first "Η This page is installed here, R β Β km: Roll radius,: friction coefficient between roll and plate: plate width,: limit average deformation resistance. The Ministry of Economic Affairs Central Bureau of Standards ’negative work consumer cooperation is printed here, when R = 23〇mm, Ren = 0.25, B = 1200mm» km = l Okg / mm2, and the value of F is from 0 t on When it is changed to 10 t on, the bite shrinkage is shown in Figure 3. The third figure also clearly shows that by increasing the pressing force, the bite shrinkage can be increased * Normally, a trimming machine or a rolling mill is arranged in the front stage of the rolling mill that uses a small-diameter work roll The squeezing force generated by this is the sum of the warping force of the rolled material bending in the width direction and the force required to increase the weight of the rolled material itself. Then, the force used to make the sheet warp. The paper scale is applicable to the Chinese National Standard (CNS) Α4 specification (210X297 mm) -10-A7 B7 5. Description of the invention (8) F 1

Fl = (1.5 * π-) " 2 * E * I / Lo'2 ...... (4), in addition, the force F 2 _ required to increase the weight of the board itself can be determined by F2 = 0.7022 · w · Lo'2 / (a · π * 2) ...... (5) ^ Ε: the longitudinal elasticity coefficient of the rolled material, I: the second moment of the cross-section of the rolled material, L 〇 : Distance between rolling stands, w: weight of the rolled material per unit length, a: 1/2 of the floating amount of the rolled material, so that the extrusion force F becomes F = F 1 + F 2 ... ... (6) Printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs. When the plate width B = 1 200 mm, the plate thickness = 10 mm, the distance between the rolling stands Lo = 5500MM, E = 7000kg / mm2, I = 83000mm4., When a = 20mm,-then F 1 = 0. 5 1 3 t ο η,! F2 = l〇. 15ton *. This paper scale is applicable to the Chinese National Standard (CNS) A4 specification (210X 297 gong) -11-A7 3i8s〇〇B7 5. Description of the invention (9) Therefore, the extrusion force F becomes F = F1 + F2 = 10.66ton ...... (7) · Figure 4 is shown in the case of B = 1200mm, h = l 〇mm, L = 5 5 0 0mm, it is the floating height of the board Starting amount, • Relationship with squeezing force. From this figure, it is known that by reducing the floating amount, a relatively high pressing force can be obtained. Printed by the Staff Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs. For example, when the friction coefficient between the roll and the plate is 0.25, the roll load is 1,500 t on, the mill rigidity is 400 t on / mm, and the roll radius is 230 mm, then The shrinkage amount Ah is 10.6 mm by the formula (1). In view of this, when the same roll diameter is used and the bite reduction is increased from 10.6 mm to 20 mm, it can be seen from Fig. 3 that a pressing force of about 7 t on is required. Then, in this case, as can be seen from Figure 4, when you want to reduce the floating amount to 60 mm or less, and suppress the floating amount of the plate, you will get a pressing force of 7 t ο η or more like this: Even if the so-called small-diameter work rolls of 460 mm are used to control the floating amount of the sheet material, a sufficient bite amount can be obtained. Here, for example, when the roll is used to control the floating amount of the plate, the pressing force is considered to consider the plate. For example, in the case of a roll diameter of 460 mm, when the amount of shrinkage is 20, The roller for pressing can be used to control the floating amount below 60 mm. In addition, when the pressing force f is the height of the circuit as Η and the board floating distance is L, the paper size is approximated by the Chinese National Standard (CNS) Α4 specification (210X297 mm) -12-Economy Ministry of Central Standards Bureau employee consumption cooperation du printing Α7 Β7 V. Description of invention (仞) f = F · H / (L / 2) ...... (8): When H = 50mm, L = 3000mm, Then it becomes 1/30 of the pressing force. In this way, it is possible to bite into the sheet adequately when the pressing force is very small compared to a very large pressing force * On the other hand, in the case of a rolling mill that uses small caliber work rolls, it is not easy The torque required at the time is directly transmitted to the work roll, so it has to be transmitted indirectly by the auxiliary roll or the intermediate roll. The rolling load is usually set to obtain the desired plate thickness: it assumes that the roll can bite into the plate sufficiently. That is to say, there is no problem in rolling in the stable part of the load rolling load; but when biting, since the load and torque are in a transient state, even if it is assumed between the plate and the roll, the , The required friction coefficient, but between rolls, it is not always possible to get the same friction coefficient. Here, when indirect driving is used to transmit the rolling torque to the sheet, the transmitted torque is obtained by multiplying the contact load between the rolls by the friction coefficient between the rolls and the roll radius. In addition, the friction coefficient required during biting is almost the same as the rolling torque required to convey it during biting. In other words, when the friction coefficient between the rolls is low and the required torque cannot be transmitted, increasing the contact load between the working roll and the intermediate roll or the auxiliary roll can compensate for the decrease in the friction coefficient. And can transmit the required torque to the work roll. In this way, the contact load caused by rolling is increased, and the size of the used paper is applied to the Chinese National Standard (CNS) A4 specification (210X297mm) -13-(please read the precautions on the east side first and then this page) )-* r Ministry of Economic Affairs Central Bureau of Standards and Staff Cooperative Printing 3 following 00 Α7 Β7 V. Invention description (11) Large roller balancing force to increase contact load and increase its transmission power for consideration. Now, When the friction coefficient at the roll contact point is μ Γ, the rolling load Ρ, the roll balance force Fw, and the working roll radius is R, the torque T1 transmitted by the indirect drive is

Tl = Ren r. (P + Fw) * R ...... (9). On the other hand, when the friction coefficient between the plate and the roll is #, the required torque T r between the rolls becomes T r = / ζ · P · R ...... (10). Therefore, if Tl> Tr, the sheet material can be bitten. By (9), (1 0) type, shellfish! Ί

Tl-Tr = ^ r * (P + Fw) * R- β · Ρ · R = Ρ · R · (u τ-β β τ 'Fw · R > 0 Roller balancing force Fw becomes

Fw > P · (β-β τ) / β r = P * (β / U- r-1) ...... (11) Here • Due to the rolling load, the P system follows , The sheet is bitten into this paper scale is applicable to the Chinese National Standard (CNS) Α4 specifications (2 丨 0 X 297 mm) -14-#, £ Read the t-face precautions ^ this page) Ding A7 __B7_ 5 The description of the invention (12) is different depending on where it is. Therefore, when the rolling load at the stabilizing part is p 〇, the biting angle is 0 0, and the angle of the current front end position of the plate is 0, then P = Po · (0 0-0) / 0 (12) Therefore, the roll balance force Fw, according to equations (11) and (12), becomes first. Please read the back-Λ note item (13)

Fw > Po · (1-0 / 0〇) · (# / μ r-1) and, when viewed from the balance of the horizontal force of the sheet in the bite-rolling bite zone, since it is 0 = // r, the required squeezing force is the largest, so when 0 = #r ， 0〇 = #, is substituted into formula (13), it becomes, line / | \ / ZN Γ Ren I ✓ (V \ ly Γ- the Ministry of Economic Affairs Central Standards Bureau employee consumption cooperation du printing "-ο- / V α *

W- I B when present η ο mm \ g k ο τΗ = m kmm o o ο Γ " 7 2 > w F then 5 2 = R is shown in the display system Figure 4

mm oo 2 IX-B standard bidder home country and the country to use suitable Igong 7 9 2 -15-V. Description of the invention (13) km = l〇kg / mi η, / z = 〇. 3 occasions, its roll The relationship between the friction coefficient # r and the required balancing force. Therefore, during biting, within the allowable range of roll neck strength, try to increase the roll balancing force or bending force as much as possible; after biting, use to restore it to the original balance force or take into account the convex shape of the plate The bending force of the roll can prevent the faulty entry. In a rolling mill that uses a roll with a small caliber such as this, the roll bending force or the balance force of the roll can be prevented by using the control of the floating amount of the sheet to control the bite. Fig. 1 shows the i-1 rolling table and the i-type rolling table of the advanced 4-fold rolling mill. The rolled material 1 is intended to pass through the i-1 rolling table and reach the i rolling table. Each rolling stand is composed of stand, 2i, working roll, 3i, auxiliary roll, 5i, work roll chock Bid, 6i, planning area, 9i, roll balancing or roll bending device lOi-i, 10i, press Lower jack llid, lli, rolling load gauge (load sensor) 13i-1, 13i, guide plate 14i_i, 14i for entrance plate, guide plate Isi-i for exit plate, 1 5 i . The caliber of the working roll is as described above. As far as the deformation of the sheet is concerned, the smaller the caliber of the roll when rolling is, the better the efficiency is, and it can be rolled with less energy *. In addition, the rolling load at this time must be as small as the required power. Therefore, from these viewpoints, the smaller the caliber of the working roll, the better. However, the rolls used in practice, the caliber of this size, changes with the bite conditions. The paper size is applicable to the Chinese National Standard (CNS) Α4 specification (210Χ297 mm) -16-please read back first. Matters needing attention

Page Printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs A7 _B7_ Printed Bag of the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economy V. Description of the invention (14). For example, when the friction coefficient between the plate and the roll is 0.25, the roll rigidity is 5 50 t 〇n / mm, the shrinkage is 2 Omm, and the roll load is 2500 t on, calculated according to (1) formula The caliber of the roll is 7 6 Omm, so the caliber of the work roll before and after 800 mm is usually selected. For example, if you use a small-diameter roll around 460 mm before and after this, when rolling, you must squeeze the rolled material when the plate bites in. Figure 1 shows that in this type of plate At the time of biting, there is a rolling machine for squeezing the pressing roller for the rolled material. Fig. 1 shows a 6-roller rolling mill having rolls for small-diameter operations applicable to the present invention. The 6-heavy rolling mill consists of 3 id, 3i for operation, 3i for intermediate, and 4i for auxiliary, 5 ^ for auxiliary rollers, 5i, to support its operational rollers, and a roll balancing device for the weight of 3i itself lOi-:!, 10i, the guide plate for the through plate at the entrance lAi-i, 14i, the guide plate for the through plate at the exit 15 ^:!, 15i, the roller for compaction can be freely raised and lowered by the hydraulic cylinder 17 ^: !, 1 7 i > 1 8 i-1, 18i, detection device 19i, according to the detection signal from the detection device 19 i to control the lifting of the pressing roller and the roller balancing device lOid, 10i roll balancing force The control device (not shown in the figure) is composed of an input device (not shown in the figure) for initial value setting. In addition, the pressing roller 17 ^:! «1 7 i, 1 8 i-α, 1 8 i, can be rotated by using the driving device and the joint not shown in the figure; even if there is no driving device In this case, the rolled material biting for the purpose of the present invention can be sufficiently achieved. Here, the paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297mm). One -17-(especially read the precautions on the t side and then this page)

* 1T Printed by the Ministry of Economic Affairs, Central Standard Falcon Bureau Employee Consumer Cooperative, 5ί8δ〇〇A7 _B7_ V. Description of the invention (15) Entrance plate rolling table 1 4, 1 4 i, which is in advance in the roll bite area and machine table Between them, there is a level difference Hi_i, Hi of 5 Omm or more; as it approaches its rolling bite zone, it is provided with a slope that can gradually approach the level of its rolling bite zone. Then, although they are not shown on the drawing, they are shown separately; but these guides for the through plate at the entrance 14 * -α, (14i), the guides for the through plate at the exit 1 5 i- !, (15i), using the oil pressure -Type cylinder and the free-up and down pressure roller ITi-i, (17i), detection device 19 :, control device, and input device are called bite assistance devices. The bite assist device can be installed on an existing rolling mill. In addition, in the existing roll mill, it is equipped with a roll balance device lOi-i, (10i), which is used to support the roll Sid, (3i), and its own weight, the control of the biting device can be used. Device to control its roll balancing device. In addition, the control device and input device can be installed separately from the rolling mill. * Next, the operation will be described. First, the operation of the pressing roller will be described using Figures 7 to 10. Fig. 7 shows a state where the rolled material 1 passes through the i-1 rolling stand and faces the i rolling stand. First, the load P 0 when the roll mill bites in is set in advance by the input device. Also, set the time during which the pressing roller 1 8 of the pressing roller of the previous heavy-duty rolling mill and the pressing roller of the rolling mill that subsequently bites in are lowered, respectively, t 1 and t 2. The values of the times t 1 and t 2 are set in accordance with the rolling speed of the rolling mill. Now, when the rolled material 1 is bitten by the rollers of the operation of the i-1 rolling table, the paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297mm) (please read the precautions on the back before filling in this Page) Order

A -18-A7 B7 Printed by the Employee Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of the invention (16) 1 1 When the output signal of the load cell increases, then 9 will pre-set the load in the control device 1 1 P 0 > compared with the output signal of the incoming load cell • 1 1 * When the set load P 0 is exceeded 9 then the timer will start * 'NI moves P then I when the timer time > becomes When t 1 is set in advance, please read 1 as shown in Fig. 7 first. Then, the rolls for the pressing of the rolling table 1 to 1 will be read on the back. When the time 9 of the device becomes t 2 > As shown in Fig. 8 Ϊ »i The roller for pressing of the rolling table 1 7 i will drop 0 As shown in (St figure clearly shows 1 I Floor 1 is limited to The roller for pressing 1 7 it 1 8 i — 1 and the guide 1 4 i at the HP and the guide 1 5 i — 1 at the outlet between t 1 1 gap Η i — 1 and Η i 0 sheet 1 is the moment when it is bitten by the rolling table y 1 1 due to the guide plate for the through plate 1 4 i and due to the reaction force at the time of entering > makes 1 I sheet 1 Warped and bent upwards as shown in Figure 9 You can use 1 to order I compaction rollers 1 8 i — 1 and 1 7 i to hold it up. Like this 1 1 I 9 Use the rolls 1 7 i and 1 8 i — 1 to suppress the floating of the sheet 1 1 so that a sufficient squeezing force can be obtained to make the roll 1 1 the material 1 bitten by the rolls for the operation of the i rolling table Into the 0 line | In this way, the sufficient squeezing force is used to make the plate 1 be bitten by the I roll 1 of the i rolling table 3 i. Then the load cell 1 3 i of the 1 1 I load detection signal Increase 0 and then the output signal of the load cell 1 1 I 1 3 i at Laibai i rolling station is larger than the preset value. 1 1 at time t, the pressing roller 1 8 i — 1 1 7 i will rise. This is as shown in figure 1 0. That is to say »the load cell 1 3 i detection letter 1! The increase of \ I Display i Rolls for operation of the rolling table 3 i Is biting into the sheet 1 1 »If the biting 9 can be carried out sufficiently 9 then the rollers for pressing 1 8 i — 1 1 1 1 This paper size applies to the Chinese National Standard (CNS) A4 Specifications (210X297 mm) -19-3ί88〇〇Α7 Β7 Printed by the Employees ’Consumer Cooperative of the Central Standards Bureau of the Ministry of Economy V. Invention description (1?) 1 7 i will rise, and start its anti-folding to start its loop control In this embodiment, the device 1 6 i 0 uses the time of the timer »to act its pressing roller, but it is not limited to this. It can also be configured to detect the position of the plate. However, t may cause damage to the sheet f when the compacting roll is lowered by 9 as soon as possible and it is in contact with the sheet 9. Therefore, it is best to set its compacting roll, and try to do it as soon as the sheet reaches the small P diameter operation roll. Good drop »to carry out the compacting operation. Therefore, the next biting operation is carried out. A detector 9 is provided near the roll for small-diameter operation. In addition to the detection of the plate, it can also lower the pressing roll 1 8 i-1 1 7 i ° or more, such as As shown in Figure 11. In addition, when using a small P-diameter working roll, the torque required during rolling due to the strength of the main shaft JrrT tearing method is directly input to the working roll, so it is used from the middle of the thicker diameter. The roller or auxiliary roller 9 is used for input indirect driving. Therefore, when the rolled material bites in, it means that the rolling load is stable, and slippage may occur between the working roller and the intermediate roller or the assistance roller. Therefore, the output of the cylinder 1 0 i-1 for balancing the operation rolls of the 1st i-1 rolling table is increased by 9 nwr within the allowable range of the neck strength of the operation rolls; or the operation rolls are used for bending The force cylinder increases the contact load between the operation roller and the intermediate roller or auxiliary roller as the maximum output at a fixed time after biting. Regarding this treatment 9, use Figure 12 to explain in detail. First, 9 set the bite load of the rolled material to P 0, and the balance force (or bending force) of the working roll • and the time is T a ° here • When the load signal sent by the load cell of i — 1 rolling table, please read the back and it ’s

A W0 The size of the paper on this page applies to the Chinese National Standard (CNS) A4 (210X297 mm) -20-Printed by the Beigong Consumer Cooperative of the Central Bureau of Economic Development of the Ministry of Economic Affairs ° ί88〇〇at __Β7 V. Description of the invention (18 ) When the pre-set load Ρ 〇 is exceeded, it can be concluded that the i-1 rolling table can bite into the bar rolling material 1; the operation of the i-rolling table roll balance is maximized, and the contact force with the intermediate roll is maximum. Then, when the output signal from the load cell of the i-rolling station exceeds the preset load P 〇, it can be concluded that the rolling material can be bitten in the i-rolling station, and the timer is started. At a preset time, the roll balancing force (or bending force) returns to the set value. The sharp angle can solve the problem of bite that is most worrying when using rolls for small-diameter operations, and can freely use rolls for small-diameter operations. In addition, there are no specific restrictions on the shape of the pressing roller, but there are features as described below. First of all, when using a narrower pressing roll that is wider than the plate of the rolled material, since the pressing roll can be reduced, the cylinder for raising and lowering the pressing roll can be reduced. In addition, when using a roll for compaction that is wider than the roll rolled material, because the roll for compaction is wider than the plate width, it is not likely to cause defects when it comes into contact with the plate. When the driving device is used to rotate the pressing roller, at least until the rolled material is driven until it is bitten by the working roller, the rolled material can be free from defects. In addition, in this embodiment, it is shown that the rollers for pressing are provided at the entrance and the exit of the rolling mill; however, they may be arranged on either side of the entrance or the exit in accordance with the distance between the rolling mills. In addition, there is no need to use the same pressing roller at the entrance and exit of the rolling mill. For example, at the entrance of the rolling mill, there can be a narrower pressing roller than the plate, which is wider than the plate. At the exit, it is wider than the board, and it is also in the Zhang's scale. It is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) · (please read the $ item on the back and fill in this page)

-21-A7 ._____ B7__ V. Description of the invention (19) The roller for compacting is wider. If you do like this, at the exit of the rolling mill, the plate will not have defects, and it can transfer the plate to a larger rolling mill. Also, when there are multiple rolling mills, the previous rolling mill can be used. The rollers for compaction that are narrower than the width of the plate are used, and the rollers for compaction that are wider than the width of the plate are used in the rear section.

Next, a description will be given of the case where the roll group is replaced. When the roll set # of the work roll 3 is changed, the roll of the work roll 3 that is in contact with the roll bearing housing 6 of the work roll cannot be carried out while the guide plate 15 at the exit is still present Group replacement job. Because of this, as shown in Fig. 13, first, the inter-roller circuit 16i is rotated to the rising end. Next, using the shrinkage gas red 2 1 i provided at the i-1 rolling stand, the guide plate 14i & i rolling stand at the entrance of the i rolling stand was avoided. Similarly, the shrinkage cylinder 20i is used to avoid the guide plate 15i at the exit. In this state, the roll group of the roll 3 for work is replaced. Printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs. As explained above, in the advanced finishing mills, the roll caliber is 80 Omm. The work caliber is used. On the other hand, it is suitable for the inventor's Multi-roll mills that are small-diameter working rolls with a diameter of 500 mm or less (for example, the roll diameter is 360 mm) can also reliably bite into the hot rolled material. Next, other embodiments to which the present invention is applied will be described. Fig. 14 shows a four-roller rolling mill in which hot rolling oil is sprayed on work rolls and auxiliary rolls suitable for the present invention. The four-roll mill is equipped with a jet nozzle 2 2 at the entrance of the operation roll, or the paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) -22-

Printed by the Beigong Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs A7 ___B7_ V. Description of the invention (20) At the entrance of the subsidy roll, or using a wiper 23 to remove the roll cooling water adhering to the roll surface, spray Head 24 to apply hot rolling oil such as tallow oil or synthetic ester. In a rolling mill like the previous one, the friction between the work roll and the sheet becomes smaller due to the hot rolling oil, resulting in a poor bite of the sheet. Because of this, the rolling material 1 stops the supply of rolling oil before the tailing, and burns the rolling oil adhering to the surface of the working roll; in the rolling operation of the next plate, the rolled material completes the biting operation After that, start spraying again. In this method of preventing the bad bite of the sheet, the effect of hot rolling oil can only exert the effect of about half of the total length. Because of this, as shown in Fig. 14, at the entrance and exit of the rolling mill, there are provided rollers for pressing. By using this, the friction coefficient between the working roll and the plate caused by the lubrication of the hot rolling oil can be reduced by the squeezing force of the rolled material, so there is no need to start supplying hot rolling oil The supply is stopped and hot rolling oil can be constantly and continuously supplied so that the hot rolling oil can reach the entire plate. The type of roll mill shown in Figure 15 is a pair of working rolls and a pair of subsidies Use rolls to support a pair of work rolls-for auxiliary rolls, at the same time in the horizontal plane * mutually transverse * to control the thickness of the rolled material in the width direction of the plate; In addition, Figure 16 is a For the working rolls, they are transverse to each other in the horizontal plane to control the thickness distribution of the rolled material in the width direction of the plate. Since hot rolling oil is also used in this type of rolling mill, as described previously, at the entrance of the rolling mill, there is a guide plate for the entrance pass, and at the exit, there is an exit Guide for through plate: And, the hydraulic type cylinder can be used freely. This paper standard is applicable to the Chinese National Standard (CNS) A4 specification (210X297mm) (please read the precautions on the back and then f this page)-install t 線 线 -23-A7 _B7_ V. Description of the invention (21) Please-Read the notes on the surface first and then the pressing rollers for lifting and lowering, which are respectively arranged at the entrance and exit of the rolling mill. The squeezing force of the rolled material caused by the guide and the pressing roller is used to supplement the reduction in the friction coefficient between the working roller and the sheet due to the lubrication of the hot rolling oil, so there is no need to start the supply of hot rolling oil at the same time. While the supply is stopped, the hot rolling oil can be constantly and continuously supplied, and the hot rolling oil can be transferred to the entire plate, so that a good rolling operation can be performed. Ordering and line addition, as shown in Figure 17 * have A roller with a gourd-shaped convex surface to control the rolling mill with a pair of intermediate rollers moving in opposite directions relative to each other in the width direction and thickness of the rolled material: and as shown in Figure 18, A multi-roll mill with two types of trapping rollers to support a pair of working rollers, and similarly, at the entrance and exit, the guide plate for the entrance plate, the guide plate for the plate at the exit, and the use of oil The pressure cylinder can freely raise and lower the pressure roller to apply pressure to the rolled material; it can be used for small-diameter operation rollers, so the roller can be miniaturized * Employee Consumer Cooperative of the Ministry of Economic Affairs In addition, the use of such a setting of the pressing roller and the control of the roller balancing force or the bending force of the roller lip make it unnecessary for the roller with a small-diameter operation roller and a large-diameter roller coated with hot rolling oil. The rolling material is stopped, and the rolling operation can be performed. Therefore, it is possible to use a rolling mill with a roll for small-diameter operations to perform rolling operations on a sheet produced by a continuous binding machine. The size of the rolled paper that can be used to prevent the bite caused by the small caliber operation rolls is applicable to the Chinese National Standard (CNS) Α4 specification (210Χ297 mm) -24-B7 _ V. The invention description (22) machine, and The size of the whole rolling equipment can be miniaturized. In addition, in a rolling mill with a roll grinding device *, roll grinding can be performed using it, so that the caliber of the working roll becomes smaller. In this way, the reduction in roll diameter will cause bite defects of the rolled material. However, like this * even if it is a roll mill with a roll grinding device, for example, as shown in FIG. 1, the guide plate for the pass plate at the entrance, the guide plate for the pass plate at the exit, and the hydraulic cylinder The pressure rollers that can be raised and lowered freely can prevent bite defects. In addition, in a roll mill with a roll grinding device, if there is a bite problem of the rolled material due to roll grinding, in order to be able to fully The control of the rollers for compaction is performed, so the roller mill is provided with a detection device for detecting the roll diameter. When the value sent by the detector is smaller than the predetermined roll diameter, the pressure can be controlled. Use the lifting and lowering force of the roller tightly. As explained above, if the present invention is used, there is no need to worry about the bite of the rolled material, and it is possible to provide a rolling device using a small-diameter work roll. Then, use such a small-diameter work roll to reduce It can provide a small rolling mill with its rolling load · Printed by the Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs The hot rolled oil can be applied to the entire area of the rolled material from the bite to the end of the rolling material that is worried about the biting of the rolled material. Next, another embodiment will be described. As shown in Figure 19, it is a 6-roll mill with rolls for small-diameter operations. With the composition of the rolling mill shown in Figure 1, the paper specifications described earlier are applicable to the Chinese National Atomic Ratio (CNS) A4 specification (210X297mm) -25-〇 丄 88QQ Α? Β7 V. Description of the invention (23) The same point is that there is no pressing roller to prevent floating caused when biting into the rolled material; because the weight of the rolled material can be obtained by the rolling mill i and The biting force β required when the work roll 3 i bites in. Then, in order to be able to be reset by the rolled material itself, the required bite force is obtained * so it is installed in the rolling mill as shown in Figure 20 The guide plate 14i for the entrance plate at the entrance is provided in the guide plate 1 5i, 1 Si-i for the exit plate at the exit, at least the guide plate for the entrance plate 1 4 i »1 4 ii, It is arranged at a position where it is only lowered by a certain value from the upper part of the working roll 3 i on the lower side of the rolling mill. More specifically, in the case where the plate thickness at the entrance is h 1 and the plate thickness at the exit of the rolling mill is h 2, the upper part of the working roll at the lower side and the entrance plate at the entrance of the working roll The interval h 3 between the pieces is equipped with a guide plate for the entrance plate, and satisfies the following formula · h 3 = (h 1-h 2) / 2 …… (1 5) Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs Printing ·. (Please read the note on the back first and then fill in this page) Λ Use this, in the rolling mill 2i-1 and the rolling mill 2i, the rolled material is reset by itself, and is bent downward. Then, when the rolled material is bitten by the operation roll of the rolling mill 2 i, although the rolled material will float, the rolled material can prevent the rolled material from floating due to its own weight, making the rolled material Bitten by the work roll. In addition, the gap between the upper part of the lower working roll and the entrance guide plate at the entrance of the working roll * can be applied to the Chinese National Standard (CNS) A4 specification (210X297 according to the paper size of the entrance measured by the test Mm) '-26-A7 B7 V. Description of invention (24) The maximum plate thickness and the minimum plate thickness at the exit are determined by the mathematical formula (1 5): it can also be set by the rolling schedule and the rolling mill The plate thickness meter at the entrance is used to perform the calculation of the mathematical formula (15), and the guide plate for the entrance plate is changed. Then, as described above, by changing the guide for the through plate at the entrance, it can also be applied to the roller for the lower side of the work due to the rolling schedule, which moves up and down. In addition, when biting, as previously described, the roll bending force or roll balancing force may be used simultaneously. In this way, it is possible to use the weight of the rolled material to provide the guide plate for the entrance plate, so that there is no need to worry about the bite of the rolled material, and it is possible to provide a rolling equipment using a small-diameter work roll. Then, a rolling mill with a pressing roller can also provide a small rolling mill, which can make the whole rolling equipment compact. In addition, the guide plate for the entrance pass determined by the mathematical formula (15), The same applies to roll mills that use large-diameter rolls or hot rolling oil to reduce their load, and can solve the problem of biting of rolled materials. At the same time, from the beginning of biting to the end of the rolling material The entire field can also be applied to oil rolls. [Illustration] Figure 1 is a cross-sectional view of the 6-roller mill showing the status of the plate through i 1-1 and i rolling table (the moment when the -1 rolling table bites in) ). Figure 2 shows the energy-saving effect of small-diameter rolls during hot rolling. Figure 3 The relationship between the pressing force of the rolled material and the shrinkage. This paper scale is applicable to the Chinese National Standard (CNS) A4 specification (210X297mm) -27-(Please read the notes on the back side of the back and fill in the iC r -installation. Employee consumption cooperation of the Central Standards Bureau of the Ministry of Economic Affairs. Du Yin A7 B7 Printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economy V. Description of the invention (25) 1 1 Figure 4 Figure 1 shows the amount of swell and the squeezing force caused by the warpage of the board when the board bites in Relation 〇1 «| Figure 5 is in indirect drive, when the plate bites in» In order to prevent slip between the rollers of the car L * 1 1 9 The friction coefficient between the rollers 1 required Roll λ- 1 Read 1 t # The relationship of the balance force 〇t, the 6th unit of 1 shows one of the state of the pass plate 1 and i The 4th roll of the rolling table 1 cross section of the machine 1% and the 7th figure shows the state of the pass plate — Sections of 6 heavy and light rolling and filling 1 machines of 1 and i rolling stands (1 rolling After the biting is completed, the i-rolling table bites in) 〇I 1 I Figure 8 shows the cross-sectional view of the i- 1 and i-rolling table of the 6-roller 1 I machine in the pass-through state (i. i Rolling table biting) 0 1 I The 9th figure shows the state of the plate 1 to 1 and 1 rolling table 6 heavy rolls 1 set | machine cross-sectional view (i moment of rolling table biting) ο 1 1 Figure 1 0 shows the 6-heavy rolls of i-1 and i rolling stands in the pass-through state 1 1 Cross-sectional view of the rolling mill (1 end of biting of rolling stand and i rolling stand) Q 1 1 Figure 1 1 is used to restrict The action flow chart of the roll of the rolling material when the bite is engaged 0 I 1 | Figure 1 2 Figure 1 is the action flow chart of the roll balance force 1 1 when the indirect drive roll bites in 0 1 1 1 3 ΓΒΓΤ The figure shows the cross section of the 6-roll mill in the state of i-1 1 and i 1 1 rolling table when the roll group is replaced (the end of the biting of the i-rolling table and the i-rolling table) 〇1 " * 1 Figure 1 4 is applicable to the hot rolling mill i — 1 and 1 of the i rolling stand • «1 4 Cross-section of the heavy-rolling mill 0 1 Figure 1 5 is the double transverse rolling mill 〇 1 1 This paper size is applicable China National Standard (CNS) A4 specification (210X297 mm) -28-3ί8〇〇〇A 7 Β7 Fifth, the invention description (26) Figure 16 is the horizontal roller for operation rolls. Figure 17 is a rolling mill for gourd-type rolls. Figure 18 is a multi-roll mill. Figure 19 is a 6-roll mill with rolls for small-diameter operations. Printed by the Ministry of Economic Affairs, Central Bureau of Industry and Engineering, Beigong Consumer Cooperative. Figure 20 is an illustration showing the layout of the guides for the plate. : Rolled material 2: Stand 3: Roll 4: Intermediate roll 5: Reinforced roll 6: Work roll chock 7: Intermediate roll chock 8: Reinforced roll chock. 9: Planning area 10: Roll balance or roll Diaphragm device 1 1: Jack for pressure 1 3: Rolling load gauge 1 4: Guide for the pass plate at the entrance 1 5: Guide for the pass plate at the exit 1 6: Circuit between rolling stands 1 7 * 1 8: Pressure Tightening roller 1 9: Detection device (please read the precautions on the back before filling in this page) f. Binding-Order. ^ La The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) 29-A7 B7 Printed by the Staff Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs

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Claims (1)

Sisaoo issued C8 _ D8 々. Patent application No. 851 06053 Patent application Chinese application Patent Fan Garden Amendment June, 1986 Amendment 1. A hot rolling equipment * belongs to the use of multiple rolling mills with operating spokes , The hot rolling equipment to roll the hot-rolled sheet, the special emblem is: the rolling mill with the above-mentioned working rolls is equipped with, in the above-mentioned hot-rolled sheet rolling line, is provided with a sloped through plate The guide member, and the roller that is arranged near the guide member for the through plate and used to hold down the floating of the hot room plate and can be raised and lowered to the desired position. Rolling equipment, in which the aforementioned rollers are rotated by means of granulators. 3. The hot rolling equipment as claimed in item 1 of the patent fan garden, in which among the multiple rolling mills mentioned above, the rolling mill at the front stage has a hot zone The plate width of the sheet also comes with a narrower width roll; the rear roll mill has a roll that is wider than the aforementioned plate and also comes wider. 4. For example, the hot rolling equipment applied for item 1 of the patent fan garden, in which there are many Table rolling At least one rolling mill is a multi-roll mill that uses multiple auxiliary rolls to support the aforementioned working rolls. 5. Hot rolling equipment such as patent application _ item 1, among the aforementioned multiple rolling mills, At least one rolling mill is equipped with a grinding device for grinding the aforementioned working rolls in the connection line. 6. A kind of rolling mill, which is equipped with rolling rolls for the plates sent continuously One pair of rollers for small-caliber operations, and a pair of intermediate rollers, and a pair of trapping rollers, and for applying oil pressure to the size of the rolled paper used in this operation are subject to China National Kneading Standard (CNS) A4 specifications ( 210X297mm > (please read the notes on the back before filling in this page) Order the A8 B8 C8 __ D8 of the Belgian Consumer Cooperatives Bureau of the Central Bureau of Economic Development of the Ministry of Economic Affairs. 6. The form of the oil pressure device of the patent-applicable roller The rolling mill is characterized in that: the rolling mill equipped with the roll for the small-diameter operation is provided with a guide member for a through plate that is provided to guide the progress of the plate and is provided above and below the rolling line of the plate, and is provided Yu Zhitong Rollers near the guide member to hold the hot-well plate floating up and down to the desired position * 7. For example, in the rolling mill of patent application No. 6, the aforementioned pair of intermediate rollers are It is constructed by moving in the direction of the roll axis of the intermediate roll. 8. A roll mill as claimed in item 6 of the patent application country, in which the oil pressure device that applies oil pressure to the work roll described above cooperates with the lifting of the roll , And is used to control the contact force between the operation roller and the intermediate k-roller. 9. A roller mill such as the patent application No. 6 in which the operation roller or the intermediate roller Either the aforementioned rolls for assisting, or the aforementioned rolls for operation and the auxiliary rolls • Each of them is opposite to the roll line • Asymmetrical • And • Bending and symmetrical bending is used * to move the roll toward the roll axis , And change the gap between the rolls. · Printed by the Beiji Consumer Cooperative of the Central Bureau of Central Economic Development of Zhongji Ministry (please read "Precautions on the back side and then fill out this page"). It belongs to a 4-stage rolling mill with a pair of work rolls and auxiliary rolls, and a device with a device for distributing hot rolling oil to the work rolls. The special features are: roll mills with the aforementioned work rolls It is provided with a guide member for the through plate provided on the rolling line of the aforementioned plate and near the guide member for the through plate * v for pressing the floating of the plate to be able to be raised and lowered to a desired position For the rolls used for the above operations, the hot rolling oil is spread on one side at the same time as the thermal paper size is applied to the Chinese National Standard (CNS) 84 specifications (2 0X297 mm) Α8 Β8 C8 D8 this 丄 8δ〇〇 6. The sheet material between the patent application scopes is guided to the aforementioned operation rolls. 1 1. For example, the four-stage rolling mill of patent application No. 10, in which the aforementioned operation rolls and the aforementioned auxiliary rolls are paired and transverse , Change the bending of the gap between the rolls to change the shape of the convex surface of the plate. 1 2. A kind of biting aid device, which is characterized by a pair of small-diameter working rolls and a pair of intermediate rolls and a Auxiliary rolls are equipped with a guide member for the through plate on the plate rolling line of the rolling mill, and a liftable roller for preventing the plate from floating, while being arranged near the guide member for the through plate Rolling, and a detection device for detecting the position of the plate, and a control device for controlling the aforementioned roll based on the position of the plate detected by the detection device Access control device, wherein the control device controls the contact force between the pair of intermediate rollers and the pair of working rollers based on the position of the plate detected by the detector. The reel rolling method is a rolling method in the form of a rolling mill equipped with a roll for rolling a small-diameter hot-rolled sheet, the special emblem is: the aforementioned rolling mill is in the hot-rolled sheet to the aforementioned small-caliber Before the working roll, the pressing roll for pressing the hot plate is lowered to the desired position: when the front end of the hot plate is bitten by the working roll, the pressing is thrown away Roll 1 5 .- A rolling method, which belongs to the form of a rolling mill equipped with a small-diameter working roll for rolling hot-slab plates and an oil pressure device that applies oil pressure to the working roll Method • The special features are: the aforementioned roll paper size uses the Chinese national standard (CNS} A4 specification (210X297 mm) ---------— (please read the precautions on the back and then fill in this page ) Order «Printed and printed A8 B8 C8 D8 by the Ministry of Economic Affairs, Central Standards Bureau, Beigong Consumer Cooperative Society. ･ ･ ･ ･ ･ ･ ｼ ｼ ｼ ･ ｼ ･ Patented rolling mill, when the rolled material reaches the aforementioned small caliber operation roll Before, the pressing rollers used to hold down the hot plate are lowered to the desired position; when the front end of the hot plate is bitten by the operation roll, the oil pressure device is used to increase the The contact force between the work roll and the intermediate roll, after the work roll bites the hot plate, the roll is raised * 1 6-a rolling method that belongs to the roll heat Small caliber Industrial rolls, and a rolling method of applying the oil pressure to the form of the rolled material of the oil pressure device on the rolls for the rolling operation, characterized in that the rolling mill is provided with a pressing device for pressing the hot plate Rollers; after passing directly under the above-mentioned pressing rollers * until they are bitten by the next rolling table, in order to prevent the rolled material from forming a loop between the rolling tables, the above-mentioned pressing rollers are set to be available In order to limit the position of the plate path; after the sheet is bitten by the rolling mill, when the anti-folding device between the rolling stations is activated, the rolled material is in a position where it will not touch the roll, waiting to be avoided. 1 7. -A bite-in aid device, the special feature of which is: a plate rolling line with a pair of small-diameter working rolls, a pair of intermediate rolls, and a pair of auxiliary rolls is equipped with a bevel A guide member for a through plate, and a liftable reel arranged near the guide member for a through plate to prevent the plate from floating, and a t detection device for detecting the position of the plate, and according to its cause Detected by the detection device The position of the sheet material to control the control device of the roll described above • 18 • The bite catcher device as described in item 17 of the patent application circle, in which the control device is based on the plate A detected by the detector (Please read note f on the back and then fill in this page), clothing. The standard size of the paper is Chinese Standard (CNS) Α4 specification (210X297mm) Printed A8 3l8S. 〇cs D8 々, the position of the patented range of materials to control the contact force β between the pair of intermediate rollers and the pair of working rollers (please read the precautions on the back before filling this page), clothing., 1Τ The size of this paper is applicable to China National Standard (CNS) A4 (210X297mm)