JP3780272B2 - Flat steel sizing method and sizing guide row - Google Patents

Description

  The present invention relates to a flat steel sizing method and a sizing guide row.

In a conventional flat steel sizing method, for example, in a method using a strip sizing device disclosed in Japanese Patent Application Laid-Open No. 2001-9516, a single drive sizing is provided behind the final stand on the rolling roll exit side. The apparatus was installed, and the sizing process was performed by lightly reducing the flat bar with a pair of sizing rollers that can be adjusted by the position adjusting means, thereby improving the product accuracy.
JP 2001-9516 A

In the conventional flat steel sizing, the variation in the product dimensions (both width and thickness) on the final stand exit side cannot be sufficiently suppressed, and it has been difficult to obtain the required constant product accuracy.
An object of the present invention is to improve the required product accuracy.

In the flat bar sizing method according to the present invention, in flat bar rolling, in a horizontal drive sizing guide disposed behind the final stand, the flat bar is reduced by 0.1 to 2% by sizing rollers from both sides in the thickness direction. In a rolling step of rolling down within a range of rates, and in a vertical drive sizing guide that is arranged adjacent to the horizontal drive sizing guide and forms a sizing guide row together with the horizontal drive sizing guide, the flat bar is orthogonal to the thickness direction. A squeeze step for squeezing by pressing with a sizing roller from the sizing side. In the sizing method, when the squaring process is performed after the rolling process, the opposite may be the case. In addition, the squaring process is performed after the first rolling process, and then the second rolling process is performed. There are cases where improvement is desired.
The flat steel sizing guide row according to the present invention includes three drive sizing guides having the same structure at the rear of the final stand in the flat steel rolling apparatus, and the main body of the first and third drive sizing guides. The directions coincide with each other, and the direction of the main body of the second drive sizing guide is 90 degrees with respect to the direction of the main bodies of the first and third drive sizing guides. The main bodies of these drive sizing guides are oriented in the direction of travel of the flat steel. The main body of the first horizontal drive sizing guide (first drive sizing guide), the main body of the vertical drive sizing guide (second drive sizing guide), and the first The two horizontal drive sizing guides (third drive sizing guide) are arranged as a main body to form one unit. The main body of each drive sizing guide in this sizing guide row is a guide box having the same structure, a roller shaft rotatably supported by this guide box, a pair of sizing rollers provided on this roller shaft, a drive source A rotation transmission mechanism for transmitting the rotational force from the sizing roller to the pair of sizing rollers, and a center adjustment mechanism for the sizing roller. The roller shaft in the main body of the vertical drive sizing guide has first and second horizontal axes. The main body of the drive sizing guide is arranged in a direction crossing the roller axis.

On the final stand exit side, the drive sizing guide performs both reduction and squaring to obtain the required product accuracy.
In flat steel rolling, a plurality of drive sizing guides behind the last stand are arranged, the first drive sizing guide is rolled down at a rolling reduction of 0.1 to 2%, and the second drive sizing guide is squared out. In the third drive sizing guide that reduces at a reduction ratio of 0.01 to 0.1% in the vertical direction, the dimensional accuracy of the width and height is further improved, and the deformation of the corner is also suppressed. .
By making the drive sizing guide a unit that can be connected in a compact manner, space saving and low cost can be achieved compared to light reduction with a rolling mill.

According to the sizing method of the present invention, since the flat steel is squeezed and squared with a plurality of drive sizing guides on the final stand exit side, the accuracy of the product width and thickness is improved, and the required constant Product accuracy can be obtained.
According to the sizing guide row of the present invention, since a common drive sizing guide is used, the configuration and assembly are facilitated.

A method for sizing flat steel according to the present invention will be described with reference to FIG.
In the sizing method shown in the figure, in the rolling of the flat bar S, the flat bar sizing process is performed by using the sizing guide row 1 arranged behind the final stand. The sizing guide row 1 includes main bodies 101a of a first horizontal drive sizing guide 101, a vertical drive sizing guide 201, and a second horizontal drive sizing guide 301 along the traveling direction of the flat steel S (from the right side to the left side in the figure). 201a and 301a are sequentially arranged on the sizing base 2 and fixed.
First, in the first horizontal drive sizing guide 101, the flat steel S is reduced by 0.1 to 2% by the sizing rollers 113 and 114 of the roller shafts 111 and 112 arranged in the horizontal direction from both sides in the thickness direction. Reduce the pressure within the range.
The calculation formula of the rolling reduction is as follows.
Reduction ratio = (d11 + d12) / Ds
However, Ds is the thickness of the flat steel S (FIG. 1), d11 is the amount of reduction from the upper side of FIG.
d12 is the amount of reduction from the lower side of FIG.
Next, in the vertical drive sizing guide 201, the pressed flat steel Sa is pressed by the sizing rollers 213 and 214 of the roller shafts 211 and 212 arranged in the vertical direction from the side perpendicular to the thickness direction thereof to perform square-out. .
After the squaring, in the second horizontal drive sizing guide 301, the squaring flat steel Sb is 0.01 to 0.1% by the sizing rollers 313 and 314 of the roller shafts 311 and 312 arranged in the horizontal direction. The sizing treatment of the flat steel Sc is completed by lightly reducing the rolling reduction within the range.
The calculation formula of the rolling reduction is as follows.
Reduction ratio = (d21 + d22) / Dsb
However, Dsb is the thickness of the flat steel Sb (FIG. 1), d21 is the amount of reduction from the upper side of FIG.
d22 is the amount of reduction from the lower side of FIG.

  On the final stand exit side, the first and second horizontal drive sizing guides 101 and 301 are used to perform primary and secondary reductions, thereby improving the dimensional accuracy of the width and height of the flat steel S and vertical drive sizing. Since the cornering is performed by the guide 201, the corner deformation is also suppressed.

Other examples of the sizing method shown are as follows.
The main body 101a, 201a, 301a of the first horizontal drive sizing guide 101, the vertical drive sizing guide 201, and the second horizontal drive sizing guide 301 is set as one unit, and a plurality of units are arranged side by side on the sizing base 2, This is a method of performing S sizing processing. In this method, the rolling step, the squeezing step following the squeezing step, and the rolling step following the squeezing step are sequentially repeated.
Further, the sizing guide row 1 on the sizing base 2 is constituted by the first horizontal drive sizing guide 101 and the vertical drive sizing guide 201, and the sizing process of the flat steel S is performed by exchanging the positions as necessary. It is. In this method, the order of the flat steel S rolling process and the squaring process is selected as necessary. In this case, it is also possible to perform the sizing process of the flat steel S by arranging a plurality of first horizontal drive sizing guides 101 and vertical drive sizing guides 201 as a unit.
Further, the reduction process is performed in two stages. That is, the sizing guide row 1 is composed of the first horizontal drive sizing guide 101 and the second horizontal drive sizing guide 301, and the flat steel S is subjected to the reduction treatment by the first horizontal drive sizing guide 101, and then the second The horizontal driving sizing guide 301 is used for light pressure reduction. In this method, the vertical drive sizing guide 201 is removed from the sizing guide row 1.

A flat steel sizing guide row 1 according to the present invention will be described with reference to FIGS.
In the flat steel rolling device, the main bodies 101a, 201a, 301a of the drive sizing guides 101, 201, 301 are placed on the sizing base 2 behind the final stand (not shown) as shown in FIGS. Sizing guide rows 1 are sequentially arranged in the direction of travel of the flat steel, and all the main bodies of the drive sizing guides have the same structure.
In the illustrated example, the main body 101a of the first horizontal drive sizing guide 101, the main body 201a of the vertical drive sizing guide 201, and the main body 301a of the second horizontal drive sizing guide 301 as the sizing guide row 1 from the right side to the left side in FIG. These drive sizing guide bodies are assembled as a compact thin unit.

The first horizontal drive sizing guide 101 will be described with reference to FIGS.
The first horizontal drive sizing guide 101 includes a main body 101a and a motor 115 as a drive source.
As shown in FIGS. 5 to 9, the main body 101a of the first horizontal drive sizing guide 101 includes a guide box 116, a pair of roller shafts 111, 112 disposed in the guide box horizontally and rotatably, The sizing rollers 113 and 114 supported by the roller shafts and rotatable integrally with the roller shafts, the rotation transmission mechanism 117 for transmitting the rotational force from the motor 115 (FIG. 4) to the roller shafts, and the pair of sizing rollers 113 and 114 A center adjustment mechanism 118 is provided to adjust the center.
A drive source such as an inverter motor is used for the motor 115, and this motor is fixed on a support base 119. The output shaft 115a of the motor 115 is connected to the input shaft 121 of the rotation transmission mechanism 117 via a connecting shaft 120 such as a universal joint (FIG. 3).
The rotation transmission mechanism 117 will be described. As shown in FIGS. 6 to 9, the end of the input shaft 121 connected to the connecting shaft 120 (FIG. 3) is in a gear box 122 provided behind the guide box 116. The drive gear 123 is attached. A first transmission gear 124 is meshed with the drive gear 123, and a second transmission gear 125 is meshed with the first transmission gear.
As shown in FIG. 9, inner holes 124a and 125a are formed in the first and second transmission gears 124 and 125, and inner teeth 124a1 and 125a1 are formed on the inner periphery of each inner hole. The head of the roller shaft 111 is inserted in an eccentric state in the inner hole 124a of the first transmission gear 124, and the operating gear 111a formed on the head is meshed with the inner teeth 124a1. The head of the roller shaft 112 is inserted eccentrically into the inner hole 125a of the second transmission gear 125, and the operating gear 112a formed on the head is meshed with the inner teeth 125a1.
For this reason, the output of the motor 115 is transmitted to the roller shaft 111 via the output shaft 115a, the connecting shaft 120, the input shaft 121, the drive gear 123, the first transmission gear 124 and the operating gear 111a, and the roller shaft rotates. Further, the rotational force of the first transmission gear 124 is transmitted to the roller shaft 112 through the second transmission gear 125 and the operating gear 112a, and the roller shaft rotates. As a result, the pair of sizing rollers 113 and 114 are in opposite directions. Will rotate.
As shown in FIGS. 5, 6, and 8, in the center adjustment mechanism 118, the first center pinion shaft 126 is horizontally disposed on the upper portion of the guide box 116, and is orthogonal to both ends of the first center pinion shaft 126. In this manner, the pair of second center pinion shafts 127 are arranged on both front and rear sides (right and left sides in FIG. 6) in the guide box. Both ends of the first center pinion shaft 126 are supported by a pedestal 128, and a transmission pinion 129 (FIG. 5) is attached to both ends. In each of the second center pinion shafts 127 arranged on the left and right in FIG. 6, first and second center pinions 130 and 131 are provided at intervals, and a driven pinion 132 is attached to the upper end.
As shown in FIGS. 5 and 8, the first and second eccentric gears 133 and 134 are attached to the roller shafts 111 and 112 in an eccentric state. The first eccentric gear 133 meshes with the first center pinion 130, and the second eccentric gear 134 meshes with the second center pinion 131.
For this reason, since the second center pinion shaft 127 is driven to rotate by the rotation of the first center pinion shaft 126 via the transmission pinion 129 and the driven pinion 132, the first and second center pinions 130 and 131 are also driven. The first and second eccentric gears 133 and 134 that rotate and mesh with these center pinions also rotate. With this rotation, the roller shafts 111 and 112 rotate eccentrically, so that the sizing rollers 113 and 114 The center distance is adjusted.
It should be noted that the number of rotations of the second center pinion shaft 127 for adjusting the distance between the sizing rollers 113 and 114 (the distance between the surfaces) can be confirmed by the encoder 135 (FIG. 5).
In FIG. 5, 136 is an entry guide, and 137 is a delivery guide.
As shown in FIGS. 2 to 4, the sizing base 2 is installed on the frame 3 so as to be movable in the front-rear direction (left and right in FIG. 4) by driving the fluid pressure cylinder 4. The sizing base 2 is fixed to and released from the frame 3 by a fluid pressure cylinder 5 provided on the right side of FIG.

The operation of the first horizontal drive sizing guide 101 will be described.
In advance, the inter-core adjustment between the sizing rollers 113 and 114 facing each other in the vertical direction in FIG. In the adjustment operation, the first and second center pinions 130 and 131 are engaged with each other through the second center pinion shaft 127 that rotates by rotating the first center pinion shaft 126. The eccentric gears 133 and 134 rotate, the roller shafts 111 and 112 rotate eccentrically, and the distance between the sizing rollers 113 and 114 is adjusted.
After adjusting the center distance, by driving the motor 115, the roller shafts 111 and 112 are rotated through the driving gear 123, the first and second transmission gears 124 and 125, and the operating gears 111a and 112a. The opposing sizing rollers 113, 114 rotate in opposite directions, the flat steel entered from the entry guide 136 is sizing, exits the delivery guide 137 and advances to the vertical drive sizing guide 201.

The vertical drive sizing guide 201 will be described with reference to FIGS. 2, 3, 10, and 11.
As described above, the main body 201a of the vertical drive sizing guide 201 has the same configuration as the main body 101a of the first horizontal drive sizing guide 101, and the main body of the first horizontal drive sizing guide 101 is turned 90 degrees from the position of FIG. It is rotated clockwise (FIG. 10).
Therefore, regarding the vertical drive sizing guide 201, only differences from the first horizontal drive sizing guide 101 will be described, and description of common points will be omitted.
The attachment state of the vertical drive sizing guide 201 on the sizing base 2 in the main body 201a is the same as the state in which the main body 101a of the first horizontal drive sizing guide 101 is rotated counterclockwise by 90 degrees from the position of FIG. Yes (Figure 10). For this reason, the roller shafts 211 and 212 are arranged in the vertical direction (the vertical direction in FIG. 10), and the outer peripheral surfaces of the sizing rollers 213 and 214 are opposed in the horizontal direction.
A base plate 238 for holding the sizing base 2 is attached to the bottom of the guide box 216 of the vertical drive sizing guide 201, and a clamp bracket 239 is attached to the rear (right side in FIG. 10).
As shown in FIGS. 3 and 4, the motor 215 is mounted on a tall support base 219, and the output of the motor can be transmitted to the input shaft 221 standing above the guide box 216.
The entry guide 236 shown in FIG. 10 corresponds to the entry guide 136 in the first horizontal drive sizing guide 101, but has a different cross-sectional shape.
An encoder 235 shown in FIG. 10 corresponds to the encoder 135 of the first horizontal drive sizing guide 101.
The operation gears 211 a and 212 a, the input shaft 221, the gear box 222, the drive gear 223, and the first and second transmission gears 224 and 225 in the rotation transmission mechanism 217 are the operation gears 111 a and 112 a and the input shaft 121 in the rotation transmission mechanism 117. , Gear box 122, drive gear 123, and first and second transmission gears 124 and 125, respectively.
The center adjustment mechanism 218 includes the first center pinion shaft 226, the second center pinion shaft 227, the pedestal 228, and the first and second center pinions 230 and 231, the first center pinion in the center adjustment mechanism 118. It corresponds to the shaft 126, the second center pinion shaft 127, the pedestal 128, and the first and second center pinions 130 and 131, respectively.
Since the vertical drive sizing guide 201 has the above-described configuration, the center of the sizing rollers 213 and 214 is adjusted by the center adjustment mechanism 218. In the adjustment operation, the first and second center pinions 230 and 231 are engaged with each other through the second center pinion shaft 227 that rotates by rotating the first center pinion shaft 226. The eccentric gear (not shown) is rotated, and the center of the sizing rollers 213 and 214 is adjusted through the eccentric rotation of the roller shafts 211 and 212 integrated with the first and second eccentric gears.
By driving the motor 215, the roller shafts 211 and 212 are rotated through the drive gear 223, the first and second transmission gears 224 and 225, and the operating gears 211 a and 212 a, and the sizing rollers 213 facing each other in accordance with this rotation operation. , 214 rotate in opposite directions, the flat steel entered from the entry guide 236 is squared out, exits the delivery guide (not shown), and proceeds to the second horizontal drive sizing guide 301.

The second horizontal drive sizing guide 301 will be described with reference to FIGS. 2 to 4, 12, and 13.
Since the main body 301a of the second horizontal drive sizing guide 301 has the same configuration and operation as the main body 101a of the first horizontal drive sizing guide 101, description of the main body is omitted.
As shown in FIG. 3, the motor 315 and the output shaft 315a have the same configuration as the motor 115 and the output shaft 115a in the first horizontal drive sizing guide 101 except for their sizes.
The roller shafts 311 and 312 constituting the main body 301a, the sizing rollers 313 and 314, the guide box 316, the input shaft 321 of the rotation transmission mechanism 317, the gear box 322, and the first and second of the center adjustment mechanism 318. The center pinion shafts 326 and 327, the pedestal 328, the first and second eccentric gears 333 and 334, the encoder 335, and the entry guide 336 include a roller shaft 111 that constitutes a main body 101a in the first horizontal drive sizing guide 101, 112, the guide box 116, the input shaft 121 of the rotation transmission mechanism 117, the gear box 122, the first and second center pinion shafts 126 and 127 of the inter-center adjusting mechanism 118, and the first and second eccentric gears 133 and 134. And Enko 135 respectively correspond further to the entry guide 136.
The support base 319 and the connection shaft 320 shown in FIG. 3 correspond to the support base 119 and the connection shaft 120 in the first horizontal drive sizing guide 101.

A flat bar sizing method using the flat bar sizing guide row 1 according to the present invention will be described.
First, in the first horizontal drive sizing guide 101, the flat bar S is moved from both the upper and lower sides between the sizing rollers 113 and 114 in the process of the flat bar S from the entry guide 136 to the vertical drive sizing guide 201 through the delivery guide 137. In the process of performing the reduction in the range of 0.01% to 2%, and then the reduced flat steel reaches the second horizontal drive sizing guide 301 from the entry guide 236 of the vertical drive sizing guide 201 through the delivery guide. The sizing rollers are also pressed in the process of pressing the flat bar between the sizing rollers 213 and 214 from both left and right sides, and the sizing bar exits the delivery guide 337 from the entry guide 336 of the second horizontal drive sizing guide. 0.01 mentioned above from both upper and lower sides between 313 and 314 Perform a light pressure in the range of 0.1% of the reduction ratio.

In the illustrated example, the main bodies 101a, 201a, 301a of the drive sizing guides 101, 201, 301 are thin units that can be connected in a compact manner. The main bodies 101a, 201a and 301a have a common structure. In other words, it is possible to assemble the sizing guide row 1 by arranging three first horizontal drive sizing guides 101 shown in FIG. 2 and rotating only the one located at the center by 90 degrees toward the front side of FIG. Become. For this reason, the drive sizing guides 101, 201, 301 can be used separately for horizontal driving and vertical driving depending on the installation position on the sizing base 2. This improves the dimensional accuracy of the width and height, and suppresses the corner deformation.
By making the drive sizing guide a unit that can be connected in a compact manner, space saving and low cost can be realized rather than light reduction with a rolling mill.

  Depending on the grade of steel and product accuracy, the configuration of the sizing guide row 1 is a combination of 3 units or 3 units according to the arrangement order of vertical drive sizing guide → horizontal drive sizing guide → vertical drive sizing guide in addition to the unit shown in FIG. Combination of multiple units with one unit, horizontal drive sizing guide → combination of two units according to the arrangement order of vertical drive sizing guides or combination of multiple units with two units as one unit, vertical drive sizing guide → horizontal drive sizing guide It is also possible to use a combination of two units according to the arrangement order, a combination of a plurality of units with two units as one unit, or a combination of only a plurality of horizontal drive sizing guides.

It is a block diagram which shows the sizing method of the flat steel which concerns on this invention. It is a partially cutaway front view showing a sizing guide row according to the present invention. It is a top view which shows the sizing guide row | line | column which concerns on this invention. It is a side view which shows the sizing guide row | line | column which concerns on this invention. It is a partially cutaway enlarged front view showing a first horizontal drive sizing guide in a sizing guide row according to the present invention. It is an enlarged side view which shows the 1st horizontal drive sizing guide in the sizing guide row | line | column which concerns on this invention. FIG. 6 is a rear view of FIG. 5. It is the VIII-VIII line expanded sectional view of FIG. It is the IX-IX line expanded sectional view of FIG. It is a partially cutaway enlarged side view showing a vertical drive sizing guide in a sizing guide row according to the present invention. It is a top view of FIG. It is an enlarged front view which shows the 2nd horizontal drive sizing guide in the sizing guide row | line | column which concerns on this invention. It is an enlarged side view which shows the 2nd horizontal drive sizing guide in the sizing guide row | line | column which concerns on this invention.

Explanation of symbols

1 Sizing Guide Row 2 Sizing Base 101 First Horizontal Drive Sizing Guide (Drive Sizing Guide)
101a Main body of first horizontal drive sizing guide (main body of drive sizing guide)
111, 112 Roller shaft 113, 114 Sizing roller 115 Motor (drive source)
117 Rotation transmission mechanism 118 Center-to-core adjustment mechanism 201 Vertical drive sizing guide (drive sizing guide)
201a Vertical drive sizing guide body (drive sizing guide body)
211, 212 Roller shaft 213, 214 Sizing roller 215 Motor (drive source)
217 Rotation transmission mechanism 218 Centering adjustment mechanism 301 Second horizontal drive sizing guide (drive sizing guide)
301a Main body of second horizontal drive sizing guide (main body of drive sizing guide)
311, 312 Roller shaft 313, 314 Sizing roller 315 Motor (drive source)
317 Rotation transmission mechanism 318 Center-to-core adjustment mechanism d11, d12 Reduction amount d21, d22 Reduction amount S Flat bar Sa Primary reduced flat bar Sb Squared flat bar Sc Secondary reduced flat bar

Claims (6)

In flat steel rolling, in a horizontal drive sizing guide arranged behind the final stand, a rolling step of rolling the flat steel from both sides in the thickness direction by a sizing roller in a range of a rolling reduction of 0.1 to 2%;
In a vertical drive sizing guide that is arranged adjacent to the horizontal drive sizing guide and forms a sizing guide row together with the horizontal drive sizing guide, the flat bar is pressed by a sizing roller from the side perpendicular to the thickness direction of the vertical drive sizing guide. A flat bar sizing method, comprising: The flat steel sizing method according to claim 1, wherein a squaring process is performed after the rolling process. In the second horizontal drive sizing guide that forms a sizing guide row adjacent to the vertical drive sizing guide after performing the squaring process after the rolling process, the squared flat steel is 0.01 to The flat steel sizing method according to claim 1, wherein the reduction is performed in a range of a reduction rate of 0.1%. Three drive sizing guides are provided behind the final stand in the flat steel rolling apparatus, and the main bodies of these drive sizing guides are the main body of the first horizontal drive sizing guide and the main body of the vertical drive sizing guide in the direction of travel of the flat steel. And a sizing guide row that is arranged as a main unit of the second horizontal drive sizing guide to form one unit,
The main body of each drive sizing guide in this sizing guide row is a guide box having the same structure, a roller shaft rotatably supported by this guide box, a pair of sizing rollers provided on this roller shaft, a drive source A rotation transmission mechanism for transmitting the rotational force from the sizing roller to the pair of sizing rollers, and an adjustment mechanism between the sizing rollers.
The orientation direction of the roller shaft in the main body of the vertical drive sizing guide is 90 degrees with respect to the roller shaft in the main body of the first and second horizontal drive sizing guides. Sizing guide column. The first horizontal drive sizing guide can reduce the flat bar from both sides in the thickness direction by a sizing roller in the range of 0.1 to 2% reduction rate, and the vertical drive sizing guide can reduce the flat bar to the flat bar. It can be squared by pressing with a sizing roller from the side perpendicular to the thickness direction, and the second horizontal drive sizing guide can be lightly reduced in the range of 0.01 to 0.1% reduction rate. The sizing guide row of flat steel according to claim 4 characterized by the above-mentioned. 6. The flat steel sizing guide row according to claim 4, wherein the main bodies of the first and second horizontal drive sizing guides and the main body of the vertical drive sizing guide are arranged on a sizing base.

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