JP3126014B2 - Roller straightening machine for section steel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller straightening machine for a section steel, which straightens the warpage of an H-section steel by passing through a group of rollers arranged in a staggered manner at the upper and lower portions along the longitudinal direction. is there.

[0002]

2. Description of the Related Art As a device for correcting warpage of an H-shaped steel, a roller straightening machine for a shaped steel has been conventionally used. Generally, in the roller straightening machine for section steel, there is a problem that an uncorrected portion remains at the front and rear ends because bending deformation is not applied to the front and rear ends of the H section steel in the longitudinal direction. In order to eliminate such an uncorrected portion even a little, in the roller straightening machine for shaped steel, screw mechanism measures should be taken so that the straightening roller has a small pitch when the straightening load is small and the large pitch when the straightening load is large. Generally, it has a roller pitch variable function that can be corrected by using.

As shown in FIG. 7, the H-shaped steel 19 is straightened by an H-shaped steel roller straightening machine by a plurality of upper straightening rollers 1 and a lower straightening roller arranged in a staggered manner along the longitudinal direction of the H-shaped steel 19. Roller 2 straightens web surface 19a of H-section steel 19 with roller 2,
Pressing at 2 gives the flange 19b repeated bending. Therefore, if the roller pitch L is too small with respect to the material size of the H-section steel 19, the correction load increases, and FIG.
As shown in (1), the web 19a is pushed by the straightening roller 1, so that the upper roller gap of the H-section steel 19 shown by the dotted line becomes smaller as shown by the solid line, flange angle deformation, web dent deformation, lower web width. It causes enlargement and deformation. This tendency is more remarkable especially in the straightening of an H-section steel having a small web thickness, such as a recent H-section steel having a constant outer method.

[0004] In order to prevent such deformation of the web 19a and perform effective straightening, it is conceivable to increase the roller pitch. In order to increase the maximum pitch, it is necessary to keep the distance between the nearest table roller and the outermost straightening roller below a predetermined value in order to receive and pay out the material without falling the H-section steel. The minimum pitch also had to be increased.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and the roller pitch has to be reduced to reduce the length of the uncorrected portion at the front and rear ends as much as possible for a size having a small correction load. For a size with a high correction load and easy to deform the web, the roller pitch can be increased to prevent the deformation of the web, and to be able to receive and discharge the material from the entrance and exit conveying table rollers. The purpose of the present invention is to provide a roller straightening machine.

[0006]

In order to solve the above-mentioned problems, the present invention has been studied variously. As a result, the present inventors have paid attention to the relationship between the correction roller and the transport roller. The invention has been completed. The present invention for achieving the above object, a maximum roller pitch L _max, a minimum roller pitch L _{mi n,} minimum material length L _O, the maximum pitch in the shape steel roller straightener having a roller pitch varying mechanism in the longitudinal direction The distance between the outermost lower straightening roller on the entrance side and the exit side of the outside and the nearest conveyance table roller are X ₁ and X ₂ respectively, and the number of the entrance side and exit side table rollers movable in the longitudinal direction is n ₁ , respectively. n ₂ , the number of lower and upper correction rollers on the entrance side and the exit side with respect to the fixed roller in the roller straightening machine are N ₁ and N ₂ , respectively, and the minimum pitch of the table roller is X _min. ) and an expression (2) shaped steel roller straightener being characterized in that deployed n ₁ and n ₂ this movable conveying table roller satisfies. _{{(L max -L min) ×} N 1 + X 1 + X min × n 1} / (n 1 +1) <L O / 2 ............ (1) {(L max -L min) × N 2 + X 2 + X _min × n ₂ ｝ / (n ₂ +1) <L _O / 2 (2)

[0007]

According to the present invention, since the conveying table roller whose pitch can be changed according to the variable amount of the correction roller pitch is installed on the entrance side and the exit side of the correction roller group, the correction roller group for the material having the minimum length is provided. The change amount of the correction roller pitch can be set arbitrarily without obstructing the receiving and paying out.

[0008] For this reason, for the H-section steel having a small sectional modulus and a small straightening load, the straightening roller pitch can be reduced to reduce the uncorrected region at the front and rear ends, and a material having a large sectional modulus and a large straightening load. In this case, the correction roller pitch is increased to reduce the load, thereby preventing the deformation of the web, thereby enabling more efficient correction.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an arrangement view of a straightening roller of a roller straightening machine for a shaped steel according to one embodiment of the present invention, in which a lower straightening roller 2 fixed and arranged at an intermediate portion of a body frame 3 in a material traveling direction.
On the left half (entrance side) and the right half (outside side) of A, two upper straightening rollers 1 and two lower straightening rollers 2 of variable roller pitch are arranged, each of which is four in total. .

The lower straightening roller 2A fixed here
The lower straightening roller 2 located on the entrance side is in a state of the maximum roller pitch _Lmax (the same pitch also in the upper straightening roller 1), and the lower straightening roller 2 located on the exit side is in the state of the minimum roller pitch _Lmin . It is in. A roller support frame 15 is disposed on the entrance side and the exit side of the main body frame 3 so as to sandwich the straightening lines of the straightening rollers 1 and 2, respectively. Moving table rollers 8 and 8 and a fixed table roller 9 are arranged from the side close to the roller 2.

FIG. 2 is a detailed view of a portion A in FIG. 1, and FIG. 3 is a sectional view taken along the line BB of FIG. As shown in FIGS. 2 and 3, the roller support frame 15 is provided with a longitudinal guide groove 16 which is open downward, and bearing frames 17A and 17B are provided at both ends of the guide groove 16. It is. Shafts 18A and 18B are vertically supported between the bearing frames 17A and 17B.
B has a feed screw 11 at its front and an upper shaft
18A is provided with a feed screw 10 at an intermediate portion.

A roller support chock 4 is set on a feed screw 11 provided on the lower shaft 18B so as to be able to advance and retreat, and a roller support chock 5 is freely movable on a feed screw 10 provided on the upper shaft 18A. Is set. Further, the upper and lower shafts 18A and 18B loosely penetrate the roller supporting chock 6 fixed to the roller supporting frame 15, and the gear box 12 connected to one end thereof,
It is connected to a drive motor 14 via 13.

In the case of this embodiment, the ratio between the screw pitches of the feed screws 10 and 11 is set to 1 to 2 in order to move the roller chocks 4 and 5 arranged on the transport roller table by one drive system. It is. Therefore, the rotation of the drive motor 14 causes the shafts 18A, 18B via the gear boxes 12, 13.
As the roller rotates, the roller support chock 4 set on the lower feed screw 11 moves forward and backward by a distance twice as long as the roller support chock 5 set on the upper feed screw 10. Thus, the movable table roller 8 supported below the pair of roller support chocks 5 is composed of a fixed table roller 9 supported below the roller support chock 6 and a movable table roller 8 supported below the roller support chock 4. And can move back and forth together with the moving table roller 8 supported at the lower part of the roller supporting chock 4.

According to the present invention, as shown in FIG. 4, in a roller straightening machine for a shaped steel having a roller pitch variable mechanism in the longitudinal direction, an upper and lower staggered upper and lower portions are arranged along the traveling direction of the H-shaped steel. roller pitch minimum L from the correction roller 1 and the lower straightening rollers 2 of the roller pitch up L _max
When the adjustment is performed based on the lower straightening roller 2A in the middle during the _min , the movement disposed on the conveying roller table according to the size condition of the material to be conveyed, such as the material length of the H-section steel to be straightened. The roller pitch is adjusted by moving the table roller 8 with reference to the fixed table roller 9 using the moving mechanism as described above.

In this manner, the H-section steel is transported without dropping from between the outermost lower straightening roller 2 and the nearest moving table roller 8 during transportation. When the H-shaped steel is straightened by the straightening rollers 1 and 2 disposed in the roller straightening machine for a shaped steel, the H-shaped steel is applied to the front end and the rear end without deformation due to over-correction of the H-shaped steel. The pitch of the correction rollers 1 and 2 is adjusted so that the length of the resulting uncorrected portion can be made as short as possible.

As described above, according to the present invention, as shown in FIG. 4, the upper straightening roller 1 and the lower straightening roller 2 which are respectively arranged vertically on the entrance side with respect to the lower straightening roller 2A fixedly arranged at the intermediate portion. Maximum roller pitch L of roller 2
The roller pitch of the table rollers 8 and 9 when _max is set is indicated by _Xmin . It indicates the distance between the outermost lower straightening roller 2 and the inlet side nearest the table roller 8 when this X _1. On the other hand, the roller pitch of the table rollers 8 and 9 when the roller pitch of the upper straightening roller 1 and the lower straightening roller 2 which are arranged two by two on the output side with respect to the lower straightening roller 2A is set to the minimum _Lmin. Indicated by X _min . Also shows the maximum pitch delivery side outermost virtual position of the lower straightening rollers 2 at a distance (indicated by a two-dot chain line) and the exit-side last table rollers 8 in X _2. In the figure, the entry side is the roller pitch up L _max state, exit side is roller pitch minimum L _min
The state of is shown.

[0017] In the present invention, the number of the lower straightening rollers 2 of the incoming side of the lower straightening rollers 2A fixed arranged for section steel roller straightening device as a reference and N _1, out lower straightening the side roller 2
Is N _2, and the number of moving table rollers 8 arranged on the inner side with respect to the fixed table rollers 9 fixedly arranged on the conveying roller tables installed on the entrance side and the exit side of the roller straightening machine for section steel, respectively. To n ₁ , n ₂
Then, the numbers n ₁ and n ₂ of the moving table rollers 8 are determined based on the following concept.

That is, the transport roller table 7 on the entrance side
The number of moving table roller 8 is disposed in the maximum variable amount of the lower straightening rollers 2 arranged on the left side of the lower straightening rollers 2A fixed arrangement _{(L max -L min) × N} 1, rollers of the lower straightening roller 2 moving table rollers 8 of the lower straightening roller 2 and the innermost side of the outermost when the pitch up L _max
In consideration of the distance X ₁ between the table rollers 8 and the minimum pitch X _min between the table rollers 8 and 9 and the number n ₁ of the plurality of movable table rollers 8 plus (n ₁ +1) the fixed table roller 9, the minimum transport distance is considered. An H-section steel having a material length L _O is to be stably conveyed without dropping from a gap formed between the outermost lower straightening roller 2 and the nearest moving table roller 8.

The number n ₁ of the movable transfer table rollers on the entrance side can be obtained based on the following equation (1). {(L _max −L _min ) × N ₁ + X ₁ + X _min × n ₁ } / (n ₁ +1) <L _O / 2 (1) On the other hand, it is disposed on the delivery roller table 7 on the _output side. maximum variable amount of the lower straightening rollers 2A of the outgoing lower straightening rollers disposed side _{2 (L max -L min) ×} N 2, lower straightening roller 2
Distance X between the lower straightening roller 2 outermost when the roller pitch maximum L _max of the most recent moving table roller 8
₂ and minimum pitch X _min between table rollers 8 and 9
In consideration of (n ₂ +1) in which the fixed table roller 9 is added to the number n ₂ of the plurality of moving table rollers 8, the H-shaped steel having the minimum material length L _O to be conveyed is the outermost lower straightening roller 2 and is stably conveyed without dropping from a gap formed by the innermost movable table roller 8.

Therefore, the number n ₂ of the movable transfer table rollers on the output side can be obtained based on the following equation (2). In _{{(L max -L min) ×} N 2 + X 2 + X min × n 2} / (n 2 +1) <L O / 2 ............ (2) the above formula (1) and (2) ( L _max -L
_min) N ₁ and (L _{ma x} -L _min) up to N ₂ is the inlet side and N ₁ present arranged on the outlet side relative to the lower straightening rollers 2A fixed arrangement, _two N of the lower straightening rollers 2 L _max
A difference when the the minimum L _min when the a portion of the gap to the mobile table roller 8 direction innermost when the lower straightening roller 2 outermost with this difference becomes L _min here Think of it as a constituent distance.

X _min × n ₁ and X _min × n ₂ are the table roller lengths when the pitch of the moving table roller 8 is minimized, and X ₁ is the outermost lower straightening when the maximum pitch L _max is set. The distance between the roller 2 and the nearest moving table roller 8. Therefore, (L _max −L _min ) × N ₁ +
X ₁ + X _min × n ₁ and (L _max −L _min ) N ₂ + X
₂ + X _min × n ₂ indicates the distance between the fixed table roller 9 and the outermost lower correction roller 2 when the lower correction roller 2 and the movable table roller 8 are set to the minimum pitches L _min and X _min , respectively. Therefore, Expressions (1) and (2) indicate that when the distance (gap) between the outermost lower straightening roller 2 and the innermost moving table roller 8 becomes maximum, the minimum material length L _O is calculated from this gap. To prevent the H-section steel from falling, move the moving table roller 8 of X _min .
This indicates how many rollers should be disposed between the fixed table roller 9 and the outermost lower correction roller 2.

FIG. 5 is a diagram illustrating a comparative example, in which an inlet and an outlet are disposed.
All the rollers provided on the transfer roller table 7 are fixed.
This is the case where the fixed table 9 is used. Where L_max= 2500m
m, L _min= 1500mm, X_min= 1200mm and X₁= 2
000 mm, it is directly connected to the lower straightening roller 2 at the exit side.
The distance from the nearby moving table roller 8 becomes 4000 mm,
Small material length L_OIs L_O/ 2> 4000mm, ie L_O>
8000mm, H-beam less than 8000mm is between 4000mm gap
There is a danger of falling off.

FIG. 6 shows a specific example of the rollers arranged on the roller straightening machine for section steel according to the present invention and the rollers arranged on the conveying roller table. As in the case of FIG.
_max = 2500mm, L _min = 1500mm, X _min = 1200mm,
And X ₁ = 2000 mm, the number N ₁ of the lower straightening rollers 2 arranged on the entrance side on the basis of the lower straightening roller 2A fixedly arranged on the roller straightening machine for section steel, and the lower part arranged on the exit side. The number of straightening rollers 2 is n ₂ = 2. Thus, the numbers n ₁ and n ₂ of the moving table rollers 8 arranged on the transport roller tables arranged on the entrance side and the exit side, respectively, are obtained by using the above equations (1) and (2). .

Equation (1) is expressed as follows: ｛(L _max −L _min ) × N ₁ +
X ₁ + X _min × n ₁ ｝ / (n ₁ +1) <L _O / 2 Equation (2) is expressed as follows: (L _max −L _min ) × N ₂ + X ₂ + X _min ×
Since n ₂ ｝ / (n ₂ +1) <L _O / 2, the numbers n ₁ and n ₂ of the moving table rollers 8 on the entrance side and the exit side are calculated using the above-mentioned numerical values, so that n ₁ > 1.15, n ₂ > 1.15, and the number of the moving table rollers 8 that satisfies the conditions of the expressions (1) and (2) is n ₁ = n ₂ = 2. In this case, the arrangement of the correction roller and the transport roller is as shown in FIG. Become.

Since the distance 18800 mm between the entrance-side fixed table roller 9 and the exit-side fixed table roller 9 is the same as in FIG. 5, the distance X between the exit-side movable table roller 8 and the stationary table roller 9 is X. = a 2133Mm, also be a distance X = 2133 and the most recent moving table roller 8 in the case of the lower straightening roller 2 to L _min = 1500 mm.
Therefore, in this case, the effect of reliably transporting the short H-section steel having the minimum material length L _O = 5000 mm without falling to X ₂ = 2133 can be obtained.

[0026]

As described above, according to the present invention, since the transfer table roller whose pitch can be changed according to the required pitch change amount of the correction roller and the minimum length of the material is provided, The necessary change amount of the correction roller pitch can be obtained without hindering the length of the material from being received and discharged to the correction roller group. As a result, the correction can be performed with an appropriate roller pitch according to the material size, so that more effective correction can be performed.

[Brief description of the drawings]

FIG. 1 is a layout view showing a roller straightening machine for section steel of the present invention.

FIG. 2 is a partially enlarged view showing a portion A in FIG.

FIG. 3 is a cross-sectional view taken along line BB of FIG. 2;

FIG. 4 is an explanatory diagram showing a configuration of the present invention.

FIG. 5 is an explanatory diagram illustrating a configuration of a comparative example.

FIG. 6 is an explanatory diagram illustrating a configuration according to an example of the present invention.

FIG. 7 is a schematic view showing a state in which a conventional roller straightening machine is passed.

FIG. 8 is a schematic view showing deformation of an H-section steel by a conventional upper straightening roller.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper straightening roller 2 Lower straightening roller 3 Body frame 4 Roller support chock 5 Roller support chock 6 Roller support chock 7 Transport roller table 8 Moving table roller 9 Fixed table roller 10 Feed screw 11 Feed screw 12 Gear box 13 Gear box 14 Drive Motor 15 Roller support frame 16 Guide groove 17 Bearing frame 18 Shaft 19 H-section steel

Claims (1)

(57) [Claims] 1. A roller pitch variable mechanism is provided in a longitudinal direction.
Roller pitch in roller straightening machine for shaped steel
L_max, Minimum roller pitch L_min, Minimum material length L _O,
Outermost lower straightening row at entry and exit at maximum pitch
And the distance between the nearest transport table roller
X₁, X_Two, Longitudinally movable entry and exit te
The number of table rollers is n₁, N_Two, Roller straightening machine
Lower part of the entrance side and exit side with respect to the fixed roller inside
Set the number of straightening rollers to N₁, N_Two, Table roller
The minimum pitch of X_minAnd the following equation (1) and
And n satisfying equation (2)₁And n_TwoMovable transport of books
A roller for shaped steel characterized by having a feed table roller
Rehabilitation machine. ｛(L_max-L_min) × N₁+ X₁+ X_min× n₁｝ / (N₁+1) <L_O/ 2 ……… (1) ｛(L_max-L_min) × N_Two+ X_Two+ X_min× n_Two｝ / (N_Two+1) <L_O/ 2 ............ (2)