JP5053899B2 - H-shaped steel roller straightener - Google Patents

Description

The present invention relates to a roller straightener for H-section steel that simultaneously reduces the web and flange of the H-section steel.

Conventionally, when correcting the bending along the longitudinal direction of the rolled H-shaped steel, a method of reducing both sides of the web with a web reduction roller is generally employed. However, in this method, the base portion of the web gradually narrows with correction and the flange spreads outward (flange spacing, that is, the web height increases), resulting in a defective shape and a material accompanying deformation at the base portion. There is a problem that changes and cracks occur. On the other hand, in the method of rolling down the flanges on both sides with the flange reduction roller, if the height position of the tip of the flanges on both sides is different, the H-shaped steel will be twisted when it is rolled down, There arises a problem that the tip of the flange is crushed by the rolling force. Accordingly, a roller straightening machine that simultaneously reduces the web and the flange has been proposed (see, for example, Patent Document 1).

Japanese Patent Publication No.57-11728

However, in the invention described in Patent Document 1, even if the height position of the flange (the height position of the flange tip surface) fluctuates in the longitudinal direction of the H-shaped steel, the flange is always pressed down by the flange pressure reduction roller. In addition, it is necessary to perform the reduction while controlling the position (axial position) of the flange reduction roller. For this reason, the flange pressure reduction roller is attached to the body frame of a roller straightening machine via a fluid pressure cylinder controlled by a constant pressure hydraulic control device, which is an example of a drive mechanism, and adjusts the axial position of the flange pressure reduction roller. is doing. For this reason, there is a problem that the structure of the roller straightening machine and the position control of the flange reduction straightening roller become complicated and the equipment cost increases. Further, when the shape of the H-shaped steel changes, it is necessary to replace the web reduction roller and the flange reduction roller, respectively, but the flange reduction roller is attached to the main body frame of the roller correction machine via a fluid pressure cylinder. For this reason, there is a problem in that the replacement of the web reduction roller and the flange reduction roller is complicated, the roller replacement property is poor, and the roller replacement time becomes long.

The present invention has been made in view of such circumstances, and has an H-shape that has a simple mechanism, does not require complicated control during correction, and is excellent in roller recombination and allows simultaneous web and flange reduction. An object is to provide a steel roller straightening machine.

A roller straightening machine for H-section steel according to the present invention that meets the above-described object is a web straightening roller pair that presses both sides of a moving H-section steel against a main shaft that is connected to a drive device and that can freely be reduced and rotated. In the H-section steel roller straightening machine,
A ring member that is respectively sheathed on both outer side portions of the web correction roller pair of the main shaft and is eccentric with respect to the axis of the main shaft;
A flange reduction roller that is attached to the outer peripheral surface of each ring member via a bearing and abuts against the front end surface of the flange while decentering the ring member following the variation in the front end position of the flange of the H-shaped steel;
An elastic member attached to the main shaft and pressing the flange reduction roller against the front end surface of the flange via the ring member and returning the eccentric center position of the ring member toward the center position of the main shaft And an urging means comprising:

In the H-shaped steel roller straightening machine according to the present invention, the ring member is formed with a through-hole having an inclined inner peripheral surface at the center, and the outer peripheral surface supports the flange reduction roller through the bearing. An outer ring portion that is eccentric together with the flange pressure reduction roller, and an inclined outer peripheral surface that is externally mounted on the main shaft and engages with the inclined inner peripheral surface, and the front side is fitted into the through-hole, It is preferable to have an inner ring part whose insertion amount increases or decreases with eccentricity.
Thus, by adjusting the amount of insertion of the inner ring portion, the eccentric amount of the outer ring portion can be adjusted, and the pressing force applied to the front end surface of the flange by the flange pressure reducing roller supported by the outer ring portion can be adjusted.

In the roller straightening machine for H-section steel according to the present invention, it is preferable that the inner ring portion is urged toward the inside of the through hole by pressing the proximal end portion by the urging means.
Thereby, the axial center position of the eccentric outer ring portion can be returned toward the axial center position of the main shaft.

In the roller straightening machine for H-section steel according to the present invention, the main shaft includes a rotating shaft connected to a rotating power unit of the driving device, the web correcting roller pair, the ring member, And a sleeve to which the biasing means is attached.
As a result, the web straightening roller pair, the ring member, and the urging means can be simultaneously removed from the main body side of the roller straightening machine by simply removing the sleeve from the rotating shaft, and the roller recombination can be further enhanced. Further, by adjusting the dimensions of the sleeve, it can be applied to a conventional roller straightening machine.

In the roller straightening machine for H-section steel according to the present invention, a web straightening roller pair is provided on a spindle that can be freely rolled and rotated, and flange rolling reduction is performed via a ring member that can be eccentric with respect to the axis of the spindle. A biasing means is provided on the main shaft so as to return the shaft center position of the eccentric ring member toward the shaft center position of the main shaft. The shaft center of the rolling reduction roller can be moved so that the flange rolling correction roller is always brought into contact with the flange tip surface and pressed, and even if the shape of the H-section steel changes, the web can be easily It is possible to simultaneously reduce the flange. And since the drive mechanism (for example, fluid pressure cylinder) which adjusts the axial center position of a flange pressure reduction roller is not attached to the main body frame of a roller correction machine, the web pressure reduction roller when the shape of H-section steel changes In addition, the replacement of the flange reduction roller is facilitated, and the recombination of the web reduction roller and the flange reduction roller is improved.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 is a front sectional view of a roller straightening machine for H-section steel according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line PP in FIG. 1, and FIG. 4 is a partial cross-sectional view of the straightening machine, and FIG. 4 is an explanatory view showing a state in which the ring member is eccentric and the flange pressure reducing roller is in contact with the flange tip surface of the H-shaped steel.

As shown in FIG. 1 to FIG. 3, an H-section steel roller straightening machine 10 according to an embodiment of the present invention is moving to a main shaft 11 that is connected to a drive device (not shown) and can be freely reduced and rotated. The web straightening roller pair 16 provided with the first and second web straightening rollers 14 and 15 respectively pressing both sides of the web 13 of the H-shaped steel 12 is sheathed. A ring member 17 that is externally mounted on the main shaft 11 at both outer positions and can be eccentric with respect to the axis of the main shaft 11, and is attached to the outer peripheral surface of each ring member 17 via a bearing 18 (for example, a roller bearing). A flange pressure reducing roller 20 that abuts on the front end surface of the flange 19 while decentering the ring member 17 following the change in the front end position of the flange 19 of the steel 12 and attached to the main shaft 11. An urging force provided with a spring 21 as an example of an elastic member that presses the flange reduction roller 20 against the front end surface of the flange 19 and returns the eccentric center position of the ring member 17 toward the central position of the main shaft 11. Means 22. Details will be described below.

The ring member 17, the flange pressure reduction roller 20, and the urging means 22 provided on both outer sides of the web correction roller pair 16 have a symmetrical configuration. Therefore, the ring member 17 on one side provided on the main shaft 11 at the outer position of the first web correction roller 14, the flange pressure reduction roller 20, and the urging means 22 will be described in detail.

The main shaft 11 includes a rotating shaft 23 connected to a rotational power unit of a driving device, a sleeve that is externally mounted on the rotating shaft 23 and to which a pair of web correction rollers 16, a pair of ring members 17, and a pair of biasing means 22 are attached. 24. The sleeve 24 is fixed to the rotary shaft 23 using a screw (not shown) which is an example of a fastening means, and both axial sides of the main shaft 11 are attached to the main body frame of the roller straightening machine 10 via bearings (not shown). Connected to the inferior part of the installed drive. Reference numeral 25 is a key for stopping rotation.

Thereby, it is possible to perform correction by pressing the web correction roller pair 16 against both sides of the web 13 of the H-section steel 12 while rotating the web correction roller pair 16. Further, by simply removing the sleeve 24 from the rotating shaft 23, the web straightening roller pair 16, the ring member 17, and the urging means 22 can be simultaneously removed from the main body side of the roller straightening machine 10, thereby improving the roller replacement. .
Reference numeral 26 denotes a web straightening roller spacer that adjusts the distance between the first and second web straightening rollers 14 and 15 according to the distance between the flanges 19 of the H-section steel 12, and reference numerals 27 and 28 denote webs, respectively. A positioning spacer and a fixing member (for example, a nut) used for positioning the correction roller pair 16 in the axial direction of the sleeve 24.

As shown in FIG. 3, the ring member 17 is formed with a through hole 30 having an inclined inner peripheral surface 29 at the center, and the outer peripheral surface supports the flange reduction roller 20 via a bearing 18 so as to correct the flange reduction. The outer ring portion 31 that is eccentric together with the roller 20 and the main shaft 11 (sleeve 24) are provided on the outer shaft 31 (sleeve 24), and the outer ring portion 32 is engaged with the inclined inner peripheral surface 29. And an inner ring portion 33 whose insertion amount increases or decreases with the eccentricity of the portion 31.

The inner ring portion 33 is urged toward the inside of the through hole 30 by pressing the proximal end portion by the urging means 22. Here, the inner ring portion 33 is packaged on the sleeve 24 via a key (not shown), and the outer ring portion 31 is packaged on the inner ring portion 33 via a key 34. The bearing 18 is fixed to the outer peripheral surface of the outer ring portion 31 using an attachment member 36. Accordingly, the sleeve 24, the inner ring portion 33, the outer ring portion 31, and the bearing 18 can be rotated integrally with the rotary shaft 23, and the flange reduction roller 20 is rotated on the outer peripheral side of the outer ring portion 31. Can do.

The biasing means 22 includes a spring 21 whose one end abuts against a proximal end portion of the inner ring portion 33, and a flange portion 35 attached to the sleeve 24 at an axially outer position of the other end portion of the spring 21 and the inner ring portion 33. And a spring pressure adjusting member 37 (for example, a plurality of shims). By selecting the thickness of the spring pressure adjusting member 37, the initial insertion amount of the inner ring portion 33 to be inserted into the through hole 30 of the outer ring portion 31 can be adjusted, and the amount of contraction of the spring 21 can be adjusted. the inner ring portion 33 into the through hole 30 of the can set the initial biasing force F ₀ when pushed.

For example, when the tip position of the flange 19 of the H-shaped steel 12 changes, even when the distance between the web 13 and the tip surface of the flange 19 becomes the minimum value H, the flange reduction roller 20 contacts the tip surface of the flange 19. When the thickness of the spring pressure adjusting member 37 is set so as to be pressed by the initial urging force F ₀ , the initial urging force F is applied to the front end surface of the flange 19 by the flange pressure reducing roller 20 in accordance with the change in the position. _The flange 19 can be corrected by pressing at ₀ or more.

Therefore, when the distance between the web 13 and the front end surface of the flange 19 increases, the flange 19 overcomes the initial urging force F ₀ and the flange 19 decenters the flange reduction roller 20 while decentering the outer ring portion 31 of the ring member 17. At this time, the amount of insertion of the inner ring portion 33 in the through hole 30 is reduced, and the spring 21 of the biasing means 22 is contracted by the amount of reduction of the amount of insertion. As the spring 21 contracts, the urging force when the inner ring portion 33 is pushed into the through hole 30 increases by F _{1, and the} front end surface of the flange 19 is urged by the urging force F ₀ + F ₁ by the flange pressure reduction roller 20. The flange 19 is corrected by the pressing force F ₀ + F _{1 when} pressed.

Further, since the inner ring portion 33 is urged into the through hole 30 by the urging force F ₀ + F ₁ , the inner ring portion 33 is fitted into the through hole 30 when the distance between the web 13 and the front end surface of the flange 19 is reduced. Then, the axial center of the outer ring portion 31 is moved to the axial center side of the main shaft 11, and the axial center position of the eccentric outer ring portion 31 (ring member 17) is returned toward the axial center position of the main shaft 11. it can.
In addition, in the biasing means 22 on the other side provided on the outer side of the second web correction roller 15, the inner ring that fits into the through hole 30 of the outer ring portion 31 by selecting the thickness of the positioning spacer 27. The initial insertion amount of the portion 33 can be adjusted, and the amount of contraction of the spring 21 can be adjusted. This allows setting an initial urging force of the pushing when the inner ring portion 33 into the through hole 30 of the outer ring portion 31 to F _0.

Then, the effect | action of the roller shaper 10 of the H-section steel which concerns on one embodiment of this invention is demonstrated.
First, when the tip position of the flange 19 of the H-shaped steel 12 changes, when the distance between the web 13 and the tip surface of the flange 19 becomes the minimum value H, the flange pressure reduction roller 20 moves the tip of the flange 19 on both sides of the web 13. The thickness of the spring pressure adjusting member 37 and the positioning spacer 27 is adjusted so that the inner ring portion 33 is moved to the outer side so that the front end portion of the flange 19 is pressed with a pressing force that does not collapse. An initial urging force F ₀ when pushing into the through hole 30 of the ring portion 31 is set. The flange 19 distal end face of the web 13 on both sides, since each will be pressed by the flange pressure correction roller 20 abutted allowed initial biasing force F ₀ or more, upon the flange pressure at the flange pressure correction roller 20, H-section steel 12 Can be prevented from being twisted.

As shown in FIG. 4, when the tip position of the flange 19 of the H-section steel 12 changes, the distance between the web 13 and the tip surface of the flange 19 increases in a direction greater than the minimum value H. The front end surface of the flange 19 can be pressed by contacting the flange 19. Here, by increasing the distance between the web 13 and the front end surface of the flange 19, the flange pressure reducing roller 20 provided on the outer peripheral side of the outer ring portion 31 is decentered with respect to the inner ring portion 33. Since the axial center position can be changed, it is possible to prevent an excessive pressing force from being applied to the front end surface of the flange 19 by the flange pressure reducing roller 20.

Further, since the inner ring portion 33 is always urged by the spring 21 of the urging means 22 so as to be fitted into the through hole 30 of the outer ring portion 31, the flange pressure reduction roller 20 is moved through the outer ring portion 31. While always abutting on the front end surface of the flange 19, the front end surface of the flange 19 is pressed by the biasing force of the spring 21. The urging force of the spring 21 acts to return the eccentric center position of the ring member 17 toward the central position of the main shaft 11 by pushing the inner ring portion 33 into the through hole 30 of the outer ring portion 31. Therefore, when the distance between the web 13 and the front end surface of the flange 19 decreases, the flange pressure reducing roller 20 presses while moving following the movement of the front end surface of the flange 19.

Further, when the size of the H-shaped steel 12 to be corrected is changed, the sleeve 24 can be pulled out from the rotating shaft 23. For this reason, the web straightening roller pair 16, the ring member 17, and the urging means 22 can be detached from the rotating shaft 23 of the roller straightening machine 10 at the same time. Next, by removing the fixing member 28 from the pulled-out sleeve 24, the second web to which the positioning spacer 27, the urging means (not shown) on the second web straightening roller 15 side, and the flange pressure reduction roller 20 are attached. The ring member 17 on the straightening roller 15 side, the second web straightening roller 15, the web straightening roller spacer 26, the first web straightening roller 14, and the first web straightening roller 14 side to which the flange reduction roller 20 is attached. The ring member 17 and the urging means 22 can be removed sequentially.

And the positioning spacer used for the correction of the H-shaped steel after the size change, the biasing means on both sides, the ring members on both sides to which the flange reduction rollers are respectively attached, the first and second web correction rollers, and the web By attaching the straightening roller spacer to the sleeve 24 and attaching the sleeve 24 to the rotating shaft 23, the roller straightening machine 10 can be easily replaced with a model that corrects the H-shaped steel after the size change.

As described above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the configuration described in the above-described embodiment, and the matters described in the scope of claims. Other embodiments and modifications conceivable within the scope are also included.
For example, the flange reduction roller used to correct the H-shaped steel after the size change is changed for each ring member, but when only the outer diameter of the flange reduction roller used to correct the H-shaped steel increases, It is also possible to replace only the flange reduction roller without changing the ring member and the bearing.

It is a front sectional view of a roller straightener for H-section steel according to an embodiment of the present invention. It is PP sectional view taken on the line of FIG. It is a fragmentary sectional view of the roller straightening machine of the H section steel. It is explanatory drawing which shows the state which made the ring member eccentric and the flange reduction roller contact | abutted to the flange front end surface of H-section steel.

Explanation of symbols

10: Roller straightening machine, 11: Main shaft, 12: H-shaped steel, 13: Web, 14: First web straightening roller, 15: Second web straightening roller, 16: Web straightening roller pair, 17: Ring member, 18: bearing, 19: flange, 20: flange reduction roller, 21: spring, 22: urging means, 23: rotating shaft, 24: sleeve, 25: key, 26: spacer for web correction roller, 27: for positioning Spacer, 28: fixing member, 29: inclined inner peripheral surface, 30: through hole, 31: outer ring portion, 32: inclined outer peripheral surface, 33: inner ring portion, 34: key, 35: flange portion, 36: mounting member , 37: Spring pressure adjusting member

Claims (4)

In an H-section steel roller straightening machine in which a web straightening roller pair that presses both sides of a moving H-section steel web is externally mounted on a main shaft that is continuously connected to a drive device and can be freely reduced and rotated.
A ring member that is respectively sheathed on both outer side portions of the web correction roller pair of the main shaft and is eccentric with respect to the axis of the main shaft;
A flange reduction roller attached to the outer peripheral surface of each ring member via a bearing, and abutting against the front end surface of the flange while decentering the ring member following the change in the front end position of the flange of the H-shaped steel; ,
Elasticity attached to the main shaft, pressing the flange reduction roller against the front end surface of the flange via the ring member, and returning the eccentric center position of the ring member toward the main shaft position And an urging means having a member. 2. The roller straightening machine for H-section steel according to claim 1, wherein the ring member is formed with a through hole having an inclined inner peripheral surface at a central portion, and the outer peripheral surface supports the flange reduction roller through the bearing. An outer ring portion that is eccentric together with the flange pressure reduction roller, and an inclined outer peripheral surface that is externally mounted on the main shaft and engages with the inclined inner peripheral surface, and the front side is fitted into the through-hole, and the outer ring portion And a roller straightening machine for H-section steel, characterized in that it has an inner ring portion whose insertion amount increases or decreases with the eccentricity of. 3. The H-shaped steel roller straightener according to claim 2, wherein the inner ring portion is urged toward the inside of the through-hole by a base end portion being pressed by the urging means. Steel roller straightener. The roller correction machine of the H-section steel according to any one of claims 1 to 3, wherein the main shaft is provided with a rotary shaft that is continuously provided to a rotary power unit of the drive device, and the web straightening is provided on the rotary shaft. A roller straightening machine for H-section steel, comprising a roller pair, the ring member, and a sleeve to which the biasing means is attached.

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