JP2006016663A - Apparatus for heating and carrying long material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for heating and carrying a long material, which uniformly and efficiently heats the end faces of a plurality of the long materials while transporting them. <P>SOLUTION: The apparatus for heating and carrying the long material includes: a pair of fixing racks 2 for supporting a plurality of the long materials W one by one with a plurality of recesses 3; a pair of mobile racks 4 that have a plurality of recesses 5 therein which have a similar shape with the recesses 3, and support the long materials W, that move to rotate the recesses 5, and that are positioned in parallel to the fixing racks 2; and a heating box 10 positioned outside both of the racks 2 and 4 in parallel to them. The mobile racks 4 support the long materials W held by the recesses 3 in the fixed racks 2, with the recesses 5, lift them upward, and move each of the long materials W down so that the recesses 3 in the direction of carrying the long materials W in the fixed rack 2 can support them, while rotating; and the heating box 10 moves up and down in synchronization with the upper half motion of the rotating motion of the mobile racks 4, and has a plurality of fuel oxygen burners 11 on the side face 12 that faces to the end faces of the long materials W held by the recesses 3 in the fixed racks 2 and by the recesses 5 in the mobile rotating racks 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a heating and conveying device for a long material for conveying a plurality of long materials made of steel, for example, and uniformly and efficiently heating one end surface or both end surfaces thereof.

  A steel material that is hot rolled from a steel ingot such as an ingot or a bloom to have a circular or square cross section and is formed into an elongated shape is cut into a predetermined length using a cold shear or an emery saw. At the time of such cutting, when a cold shear is used, shear cracking may occur on the cut surface (end surface), or when an emery saw is used, the vicinity of the cut surface may be quenched. If the shear crack or the baking is on the end face, there is a risk of causing quality troubles in the next step of processing the long material after cutting.

In order to prevent the quality trouble, a method of bundling a plurality of long materials such as steel materials, heating these end faces again, and normalizing the vicinity of the end faces is performed.
For example, a group of straight bars in which a large number of straight bars are bundled together are opposed to an oxygen burner having a large number of nozzle holes, and are moved while maintaining the oxygen burner in close proximity to each end face of the group of straight bars. Thus, a straight rod end face heating method and a heating apparatus for uniformly heating the end face of each straight rod have been proposed (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2000-26918 (pages 1 to 5, FIGS. 2 and 3)

  However, according to the straight rod end face heating method and heating apparatus, after a number of long materials are once bound and placed on the receiving portion, the oxygen burner is brought close to each end face to heat each end face. Therefore, many preparatory steps, such as the above-described bundling, conveyance of the straight bar group, and movement of the oxygen burner, are required. In addition, after heating, a post process opposite to the above is required. Moreover, since the end faces of the long material in a bundled state are heated at the same time, it is difficult to uniformly heat the end faces no matter how close the oxygen burner is.

  The present invention solves the problems in the background art described above, and provides a heating and conveying device for a long material capable of heating a plurality of long materials uniformly and efficiently while conveying a plurality of long materials. Is an issue.

Means for Solving the Problems and Effects of the Invention

In order to solve the above problems, the present invention conveys a plurality of long materials one by one along their width direction, and simultaneously heats the end surfaces of the respective long materials in a part of the conveying step. It was created with the idea in mind.
That is, the heating and conveying device for a long material according to the present invention (Claim 1) includes a plurality of fixed racks that individually support a plurality of long materials such as steel materials by a plurality of recesses, and a position parallel to the fixed rack. And at least one of a plurality of movable racks having a plurality of concave portions that are similar to the concave portions and that support the long material and each concave portion is capable of rotating, and a plurality of sets of the fixed rack and the movable rack. A plurality of movable racks, each of which is supported by the respective concave portions of the fixed rack and lifted upward by supporting the respective concave members. The rotary motion of the fixed rack can be lowered so as to support each long material in each recess in the direction in which the long material is to be transported, and the heating box is substantially the upper half of the rotational motion of the movable rack. Synchronize with movement and move up and down Having a plurality of heating means on the side facing the end face of the long material supported individually in the recess of the moving rack to the recess and the rotational motion of the rack, characterized in that.

According to this, when a plurality of long materials are supported by the respective concave portions of the fixed rack at both ends, and when the concave portions of the movable rack move while rotating, the respective concave portions are supported by the respective concave portions of the movable rack. The end face of each long material approaches the side face having a plurality of heating means in the heating box that moves up and down in synchronization with these. In addition, while maintaining the approaching state, the end surface of each long material is uniformly heated by the above heating means, so that the above-mentioned quenching and shear cracking in the vicinity of the end surface can be removed, eliminating the quality trouble in the next process. can do. Further, since the plurality of long materials are sequentially fed one by one along the width direction by the fixed rack and the moving rack, for example, after being hot-rolled, each end surface is not waited for cooling to near room temperature. Can be sequentially performed.
The cross-sectional shape of the long material includes a circle, a square, a rectangle, and the like. In addition, the material of the long material includes not only steel materials but also non-ferrous metals as long as the material can be burned or shear cracked in the vicinity of the aforementioned cut surface (end surface). Furthermore, the set of the fixed rack and the movable rack indicates one adjacent to each other.

Further, according to the present invention, the pair of the fixed rack and the movable rack is arranged in parallel near both ends of the plurality of long members, and at least one outer side of the pair of the fixed rack and the movable rack. In addition, a heating and conveying device for a long material (Claim 2) in which the side surface of the heating box is arranged close to the end surface of the long material is also included.
According to this, the plurality of long materials are sequentially fed one by one along the width direction by the pair of fixed racks and moving racks, and when they are lifted together with the moving racks, Either end face can be heated uniformly. Therefore, depending on the number of long materials to be heated, the temperature range, the space, etc., both end faces can be heated at the same time, or one end face can be heated and then transported further to heat the other end face. Yes.

Further, according to the present invention, the rotational movement of the movable rack is such that each concave portion forms a substantially circular or substantially rectangular movement locus in a side view while keeping the movable rack in a substantially horizontal posture. The body also includes a long material heating and conveying device (Claim 3) that moves up and down in a range corresponding to substantially the upper half of the movement locus formed by the concave portion by the rotational movement of the movable rack.
According to this, the heating box which raises one end surface or both end surfaces of a plurality of long materials which are lifted while being supported in the vicinity of both ends by each concave portion of the movable rack, and moves up and down synchronously with these long materials. A plurality of heating means on the side of the body can be heated uniformly. Moreover, since the heating box moves up and down within a similar range while approaching the end surfaces of the plurality of long materials, the size in the vertical direction can be minimized and can be manufactured at low cost.

Further, in the present invention, the heating box has a plurality of rods having a roller in contact with the moving rack at a lower end and transmitting substantially the upper half of the rotational movement of each recess in the moving rack to the heating box. Also, a heating and conveying device for a long material comprising a stopper for preventing the lowering of the heating box so as to remove substantially the lower half of the rotational movement of each recess of the movable rack (Claim 4) included.
According to this, each movable rack has a concave portion in the movable rack when the concave portion performs a rotational movement in a substantially circular or substantially quadrangular shape (square or rectangular shape) by side vision while keeping the overall posture substantially horizontal. In the substantially upper half range of the moving trajectory, the heating box can be surely moved up and down in the substantially upper half range of the moving trajectory in a horizontal posture. Therefore, it is possible to uniformly and efficiently heat the end surfaces of the plurality of long materials with a small number of heating means.

In addition, in the present invention, the heating box has a plurality of oxygen burner holes or a plurality of induction heating bodies on a side surface facing the end surface of the long material, and a heating and conveying device for a long material (invoice). Item 5) is also included.
According to this, a large number of oxygen burner holes are formed in the side surface, or a heating box body in which a plurality of induction heating bodies are provided side by side along the longitudinal (horizontal) direction of the heating box body. For this reason, according to the material of the long material which should be heated, an end surface size, etc., the end surface heating of a long material can be performed more effectively using an optimal heating box.
As the induction heating body, for example, a structure in which a spiral induction coil is arranged inside an insulating material or a nonmagnetic material is used.

In the following, the best mode for carrying out the present invention will be described.
FIG. 1 is a perspective view showing an outline of a heating and conveying apparatus 1 for a long material according to the present invention, and FIG. 2 is a side view including a schematic cross section in part along the line AA in FIG. FIG. 3 is a front view that is perpendicular to FIG. 2 and partially includes a cross-section.
As shown in FIGS. 1 to 3, the long material heating and conveying apparatus 1 includes a pair of left and right (a plurality) horizontal fixed racks 2, and a pair of left and right (a plurality) positioned adjacent to and parallel to the fixed rack 2. The movable rack 4 and a heating box 10 positioned in parallel with the fixed rack 2 and the movable rack 4 are provided outside the pair of movable racks 4.
As shown in FIGS. 1 and 2, the fixed rack 2 is made of an elongated steel member, and has a large number of recesses 3 having a substantially V-shaped cross section along its upper side.

  The movable rack 4 is also made of an elongated steel member, and has a large number of concave portions 5 that are similar to the concave portion 3 and have a substantially V-shaped cross section along the upper side thereof. As shown in FIGS. 2 and 3, the movable racks 4, 4 have a pair of front and rear rods 6 hanging from the bottom, and a level plate 7 is fixed horizontally to the lower ends of the four rods 6. The movable racks 4 and 4 are configured so that the plurality of concave portions 5 draw a circular movement locus in a side view by a cam or a crank mechanism (not shown) while maintaining a substantially horizontal posture as indicated by arrows in FIGS. Rotating motion is possible.

Further, the heating box 10 has an elongated rectangular parallelepiped shape as a whole, and a plurality of oxygen burner holes (heating means) 11 to be described later are formed in a side surface 12 facing the one movable rack 4. As shown in FIGS. 2 and 3, the heating box 10 includes a pair of front and rear horizontal members 13, a connecting body 15 that supports the rear end thereof, and a spline shaft 14 that is connected to the connecting body 15. Is supported by a pair of ball spline bearings (hereinafter simply referred to as “bearings”) 16 that are moved up and down via a large number of balls.
The connecting body 15 is fixed to the upper end portion of the spline shaft 14 and moves up and down in accordance with the raising and lowering of the heating box 10. The pair of bearings 16 are supported on the floor surface via a stand (not shown).

As shown in FIGS. 2 and 3, rollers 8 are pivotally supported at the lower ends of a pair of rods 9 that individually hang from the pair of horizontal members 13. The roller 8 is separated from the level plate 7 when the movable racks 4 and 4 of FIGS. 1 to 3 are at the lowest position and at the same height as the fixed racks 2 and 2. When the movable racks 4 and 4 are raised, they come into contact with the upper surface of the level plate 7 and roll. At this time, in the heating box 10, the movement trajectory of each recess 5 due to the rotational movement of the movable rack 4 is maintained while maintaining the horizontal posture as each spline shaft 14 freely moves up and down as shown by the arrows in FIG. It is possible to move up and down within the upper half of the range.
As shown in FIG. 3, a vertical bar 19 is erected on a horizontal plate 17 projecting from the bearing 16 toward the level plate 7, and its upper end is made of hard rubber or the like and is formed on the lower surface of the horizontal member 13. A contactable stopper 18 is provided. As shown in FIGS. 1 to 3, the stopper 18 abuts against the lower surface of the horizontal member 13 when the movable racks 4, 4 are lowered, and prevents the heating box 10 from being lowered more than a predetermined amount. It is.

Here, the heating of the long material and the operation of the conveying device 1 will be described.
For example, a steel material that is hot-rolled between grooved rolls to have a predetermined diameter (for example, 30 mm) is cut into a predetermined length (for example, 6 meters) by an emery saw to form a plurality of long materials W. . Each long material W is in a state of being burned near its cut surface (end surface) at the time of cutting.
The plurality of long materials W are gripped one by one by, for example, an articulated robot, and are disposed in the concave portions 3 of the pair of fixed racks 2 and the concave portions 5 of the pair of movable racks 4 as shown in FIGS. The vicinity of both ends is sequentially supported and conveyed from the left side to the right side in FIG.

In the state of FIGS. 1-3, a pair of movable rack 4 exists in the lowest position in the movement locus | trajectory of the rotational movement of each recessed part 5, and the said movable rack 4 and the fixed rack 3 are as shown in FIG. It overlaps including each recessed part 3 and 5 by side view. For this reason, each long material W is supported by the concave portions 3 and 5 of the fixed rack 2 and the movable rack 4. Moreover, in FIGS. 1-3, since the movable rack 4 exists in the lowest position, each roller 8 in the lower end of the rod 9 by the side of the heating box 10 is separated from the level board 7, and is located in the upper direction.
Next, as shown by the curved arrows in FIG. 4, the pair of movable racks 4 are lifted substantially obliquely upward along the arc shape while maintaining a substantially horizontal posture by a mechanism (not shown). Each recess 5 is rotated.

As a result, as shown in FIGS. 4 and 5, each long material W is separated from each recessed portion 3 of the fixed rack 2 and is supported and lifted only by each recessed portion 5 of the movable rack 4, and rises in a substantially oblique direction. To do. At the same time, as the pair of movable racks 4 rises, the upper surface of the level plate 7 comes into contact with the rollers 8 on the heating box 10 side, and the heating box 10 can be raised through the rods 9 and the horizontal members 13. And
Further, when the movable racks 4 and 4 are raised while rotating the concave portions 5 and are raised to the upper half side of the circular movement, the rollers 8, the rods 9, and the horizontal plates are also lifted together with the level plates 7 that are similarly raised. The heating box 10 also starts to rise through the member 13. At this time, the spline shaft 14 connected to the connecting body 15 at the rear end of each horizontal member 13 is supported by the bearing 16 and lifts while sliding the bearing 16.

  Next, when the concave racks 5 are rotated, the movable racks 4 and 4 are further raised in an arc shape, and when the concave parts 5 are raised to the top of the circular movement, as shown in FIGS. 4 and ascending, the heating box 10 is also raised via the roller 8 and the like. During this time, the right end surface (one end surface) in FIG. 7 of each long material W rises as the movable rack 4 rises, and the side surface of the heating box 10 with respect to the right end surface of each long material W 12 approaches and rises synchronously. Further, as shown in FIG. 7, the horizontal member 13 on the heating box 10 side is separated from the stopper 18.

In this state, as indicated by a dashed line arrow in FIG. 8, as indicated by a vertical arrow in FIG. 8, the right end surface of each long material W rising along the circular movement locus of each recess 5. Then, the flame f is blown and heated from a plurality of oxygen burner holes (heating means) 11 formed in the opposite side surfaces 12 of the heating box 10 that rises in synchronization with the movable racks 4 and 4. The spraying of the flame f is continuously performed with respect to the right end surface of each long material W in a range approximately in the upper half of the movement trajectory due to the circular motion of each recess 5 in the movable rack 4.
For this reason, the right end surface of each long material W is heated uniformly, and the quenching state entered at the time of cutting near the right end surface can be eliminated and normalization can be performed reliably. In addition, the right end surfaces of the plurality of long materials W can be heated at the same time, and the oxygen burner holes 11 drilled in the direction perpendicular to the side surface 12 of the heating box 10 can be minimized. The manufacturing cost can be reduced and the fuel cost can be saved.

Furthermore, as indicated by the curved arrows in FIG. 9, when the pair of movable racks 4 and the long materials W begin to descend substantially obliquely downward, the heated solid 10 also begins to descend in synchronization with this. As shown in FIGS. 9 and 10, the horizontal member 13 on the heating box 10 side is moved to each stopper 18 when it is lowered below the upper half in the circular movement movement locus drawn by each recess 5 in the movable rack 4. Abut. For this reason, the heating box 10 is prevented from descending below this. Until just before the descent stops, the flame f from each oxygen burner hole 11 of the heating box 10 is continuously blown against the right end surface of each long material W.
And when each recessed part 5 of a pair of movable rack 4 descend | falls to the lowest position in circular rotational motion, as shown in the said FIGS. 1-3, the movable rack 4 will become the same height as the fixed rack 2, and each The recesses 3 and 5 also overlap each other in a side view. At this time, each long material W lowered by the movable rack 4 is sequentially fed to the recess 3 adjacent to the right side (conveying direction) of the fixed rack 2 in FIG.

According to the heating and conveying apparatus 1 described above, while conveying a plurality of long materials W along the width direction, the end surface of each long material W can be reliably and uniformly heated along the way, and the heating box The body may have a small vertical dimension, and the fuel cost can be reduced.
1 and 3, a pair of fixed racks 2 and moving racks 4 are extended ahead of each long material W in the conveying direction, and another heating box 10 or the above-described heating box 10 is placed on the opposite side of the heating box 10. By arranging the bearings 16 and the like in the same manner and symmetrically as described above, each long material W can be transported while continuously heating the left end surface (the other end surface) of each long material W.
Alternatively, in FIGS. 1 to 3, both ends of each long material W are arranged symmetrically on a pair of left and right outer sides of a pair of left and right fixed racks 2 and movable racks 4. Each long material W can be transported while continuously heating the surface.

FIG. 11 shows a heating box 20 of a different form, and a plurality of induction heating bodies 24 are continuously provided along a longitudinal (horizontal) direction on a side surface 22 of the elongated rectangular parallelepiped facing the end surface of the long material W. Are arranged. The induction heating body 24 has a spiral coil C arranged on the inner side or the back side of a non-magnetic plate, for example.
When a high frequency current is passed through the coil C, a magnetic field is generated along an axial direction orthogonal to the radial direction of the coil C. The magnetic field permeates near the end face of the long material W made of a magnetic material and approaches the side surface 22 of the heating box 20 and excites the magnetic material near the end surface to induce induction heating. Accordingly, the vicinity of the end face of the long material W can be rapidly heated to eliminate the quenching state at the time of cutting, and the long material W can be applied to the side surface 22 even if the heating box 20 has a small vertical dimension. The induction heating body 24 corresponding to the end face shape and dimensions can be easily arranged.

The present invention is not limited to the above embodiments.
For example, an elongated steel material having a square or rectangular cross section may be used as the heating and conveying object of the present invention.
Also, as a heating and conveying device for a long material including three or more rows of fixed racks parallel to each other, three or more rows of movable racks parallel to each other, and a heating box located on at least one of these outer sides. good.
Further, the fixed rack and the movable rack may have a plurality of concave portions that are substantially semicircular and similar to each other continuously along the upper side. In the mobile rack, each concave portion can rotate as described above, and therefore each concave portion draws a movement locus such as a circle or a quadrangle in a side view. According to this embodiment, the long material W having a circular cross section or an ellipse can be heated and transported with less vibration.

Further, the shape of the recessed portion of the fixed rack, the recessed portion of the movable rack, and the receiving surface of the receiving portion may be, for example, a U-shape or an inverted trapezoidal shape that opens upward in a side view. Also, a long material having a hexagonal cross section or an octagonal cross section can be used as a heating and conveying object of the present invention.
Furthermore, a plurality of the heating box bodies may be arranged continuously or at intervals along the outer side of at least one of a plurality of sets of parallel fixed racks and moving racks. .
In the control room, the movement of a large number of long materials, moving racks, heating boxes, etc. in the control room is monitored by the monitor of each part, and new long materials are carried in, end surfaces are heated, It is operated fully automatically, including unloading long materials that have already been transported.

The perspective view which shows the outline of the heating and conveyance apparatus of the elongate material by this invention. The side view including a general | schematic cross section in a part along the arrow of the AA line in FIG. FIG. 3 is a front view partially including a cross section in a vision orthogonal to FIG. 2. The side view similar to FIG. 2 which shows the effect | action of the said apparatus. FIG. 5 is a front view partially including a cross section in a vision perpendicular to FIG. 4. The side view similar to FIG.2, 4 which shows the effect | action which the said apparatus continues. FIG. 7 is a front view partially including a cross section in a vision perpendicular to FIG. 6. The partial perspective view which shows the vicinity of a heating box. The side view similar to FIG.2,4,6 which shows the effect | action of the said apparatus subsequent. FIG. 10 is a front view partially including a cross section in a vision perpendicular to FIG. 9. The fragmentary perspective view which shows the heating box of a different form.

Explanation of symbols

1 ......... Heating and Conveying Device 2 ............... Fixed Racks 3, 5 ......... Recess 4 ............... Moving Rack 8 ............... Roller 9 ......... Rod 10,20 … Heating box 12, 22… Side 18 ………… Stopper 24 ………… Induction heating W …………… Long material

Claims (5)

A plurality of fixed racks for individually supporting a plurality of long materials such as steel materials by a plurality of recesses;
A plurality of movable racks that are parallel to the fixed rack, have a plurality of concave portions that are similar to the concave portions and support the elongated material, and each concave portion can rotate.
A heating box positioned parallel to the outside of at least one of the plurality of sets of the fixed rack and the movable rack, and
Each of the plurality of movable racks has a long material supported by each concave portion of the fixed rack supported by the concave portion, lifted upward, and each long material in the direction in which the long material in the fixed rack should be conveyed While being able to rotate down to support the material,
The heating box is moved up and down in synchronization with the movement of the upper half of the rotational movement of the movable rack, and the end face of the long material individually supported by the concave portion of the fixed rack and the concave portion of the movable rack that rotates. A plurality of heating means on the side facing the
An apparatus for heating and conveying a long material. A pair of the fixed rack and the movable rack is arranged in parallel near both ends of a plurality of long materials,
The heating box is disposed on the outside of at least one of the pair of the fixed rack and the movable rack, and the side surface thereof is disposed close to the end surface of the long material.
The apparatus for heating and conveying a long material according to claim 1. The rotational movement of the movable rack is such that each concave portion forms a substantially circular or substantially rectangular movement locus in a side view while keeping the movable rack in a substantially horizontal posture.
The heating box is raised and lowered within a range corresponding to substantially the upper half of the movement locus formed by the concave portion by the rotational movement of the movable rack.
The apparatus for heating and conveying a long material according to claim 1 or 2.   The heating box has a roller that contacts the movable rack at the lower end, and transmits a plurality of rods that transmit substantially the upper half of the rotational movement of the concave portions in the movable rack to the heating box, and the concave portions of the movable rack. The heating of the long material according to any one of claims 1 to 3, further comprising a stopper for preventing the heating box from descending so as to remove substantially the lower half of the rotational movement of the heating material. And conveying device. The said heating box body has a some oxygen burner hole or a some induction heating body in the side surface facing the end surface of the said elongate material, The elongate in any one of the Claims 1 thru | or 4 characterized by the above-mentioned. Material heating and conveying device.

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