JPH07299683A - Cutting machine for h-steel - Google Patents

Abstract

PURPOSE:To prevent the occurrence of a cutting bend phenomenon and of the sandwichedly holding phenomenon of a saw blade for shortening required cutting time by providing a melting feed mechanism for giving a feed in a direction where cut grooves formed through the rotary cutting tool of a cutting head are mutually connected in a melting head. CONSTITUTION:A round saw blade R is rotatingly driven, and a depth setting action is given by depth setting feed mechanisms 4a, 4b. Both flange parts WF and a part of both the sides of a web part Ww in a H type steel W are thereby cut. Next, right and left moving mechanisms 5a, 5b are driven to make cutting heads 3a, 3b evacuate as far as a fixed distance in a mutually separating direction. A melting head 6 is then positioned on the one end of the web part Ww on the side of the cutting head 3a, and a melting nozzle 61 is lowered to just above the head 6. The melting nozzle 61 is ignited, and the melting head 6 is fed along a rail. The middle part of the web Ww is thereby meltedly cut, and the H type steel W is therefore perfectly cut without causing a cutting bend phenomenon and the sandwichedly holding penomenon of the saw blade.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a cutting machine for H-section steel.

[0002]

2. Description of the Related Art Conventionally, when cutting an H-section steel, one conventional cutting method is a method in which a fusing nozzle such as a gas torch is made to traverse laterally above the flange section of the H-section steel and above the web section. However, in general, the web part has a thin wall thickness, so that a good cut surface can be obtained, but the flange part has a large wall thickness, so a large amount of slag is generated, and post-finishing is required. It has been determined that the intersection between the web and the web is too small for practical use because it has a wide melted portion and collapses to the extent that it loses its original shape.

There is also a method of cutting with a large-diameter circular saw in one cut, but this requires a large amount of equipment, blades, and power, and is therefore used only for mass production such as in iron mills. To date, ordinary offices typically use relatively small and inexpensive band saws.

In the band saw machine, as shown in the front view of FIG. 16, a band saw blade 81 is looped around a pair of saw wheels 82a and 82b, and the band saw blade 81 is cut by two saw guides 83a and 83b. By sandwiching it, the posture is regulated so that the band saw blade 81 is in a state along the cutting direction vertically below, and the saw guides 83a and 8a are provided therebetween.
3b is changed in accordance with the width of the material W to be cut, and the band saw blade 81 is provided near the both sides of the material W with the saw guide 83.
It is designed to be cut while running while being guided by a and 83b.

[0005]

By the way, the H-section steel is
In recent years, the dimension between both flanges (hereinafter, simply referred to as width) is becoming wider. When cutting such a wide H-section steel with a band saw machine, not only it is necessary to use a large band saw machine, but also the interval between the saw guides must be widened.

[0006] Here, if the interval between the saw guides becomes wider, the band saw blade bends between them, so a so-called bending phenomenon in which the band saw blade cuts in a direction deviating from the original cutting direction easily occurs. There is a problem that accurate cutting becomes difficult.

In addition, even if the width of the H-section steel is widened, the thickness of the web portion is generally not so thick, and a large band saw machine is used, and the saw guide interval is widened to cover a long distance. Despite cutting the band saw blade vertically downward, in most sections during cutting, the band saw blade only contributes to the cutting of the flange portions on both sides, there is a system inconvenience, The time required for cutting is also long and inefficient.

Further, in the wide H-section steel, due to the manufacturing process, the residual stress of the web portion is large, and the meat is protruding from both sides of the kerf formed by cutting, and the kerf is gradually narrowed. There is also a troublesome problem of getting the band saw blade caught.

The present invention has been made in view of such a situation, and even in the case of a wide H-section steel, it does not cause a bending or the like and is always accurate, and the blade is not pinched. The purpose of the present invention is to provide a cutting machine that can cut the material.

[0010]

A structure for achieving the above-mentioned object will be described with reference to FIGS. 1 to 3 which are drawings of an embodiment. Should be H
Holding mechanism 2 for fixing shaped steel W and its holding mechanism 2
A pair of cutting heads 3a and 3b, which are arranged facing each other on both sides in a direction orthogonal to the longitudinal direction of the H-shaped steel W fixed by the above, and each of which mounts a rotary cutting tool R, and each cutting head 3 thereof.
Cutting feed mechanisms 4a and 4b for giving cutting feed to a and 3b respectively, a cutting head 6 arranged above a pair of cutting heads 3a and 3b, and a rotary tool for each cutting head 3a and 3b It is characterized by having a fusing feed mechanism 7 that feeds in the direction of connecting the cut grooves by R.

Here, the fusing and feeding mechanism 7 can be configured to give the fusing head 6 not only a one-dimensional feeding as described above, but also a two-dimensional feeding along a horizontal plane. Further, the cutting directions of the cutting heads 3a and 3b are set to the vertical direction, and the cutting heads 3a and 3b are cut.
The left and right moving mechanisms 5a and 5b for moving the respective parts closer to and further from each other according to the material width and the cutting tool set depth for the flange portion.
Is preferably provided.

As an embodiment of the H-section steel cutting machine of the present invention, a control means 100 for controlling each of the above-mentioned mechanisms in a predetermined order is provided to feed each cutting head 3a, 3b with a cutting feed. After cutting both flange portions Wf of the H-section steel W fixed by the holding mechanism 2, the fusing nozzle 61 is lowered and the fusing head 6 is fed to feed the web section W of the H-section steel W.
Each mechanism can be automatically controlled so that w can be blown.

In addition to the above-mentioned mechanisms, it is desirable to provide a constant-size feed mechanism 8 for feeding the H-section steel W to be cut by a set distance in the longitudinal direction to the holding mechanism 2. Furthermore, a bed 110 rotatable around a vertical shaft 112 is provided on the base 1, and the cutting heads 3a, 3
b on the bed 110, and the fusing head 6
It is also possible to provide the two-dimensional feed along the horizontal plane by the fusing feed mechanism 7.

The rotary cutting tool referred to in the present invention means, for example, a circular saw blade or a cutting grindstone, which is a tool for cutting and cutting the material by applying rotation, and the fusing head is , A head for heating and melting a material by using gas, arc, laser beam or the like to cut the material, that is, a portion having a torch or an output nozzle portion.

[0015]

According to the present invention, in consideration of the shape of H-section steel, the thickness of each part and the distribution of residual stress, by applying the cutting method most suitable for each part when cutting the whole, accurate and high efficiency is achieved. The purpose is to obtain a cutting machine that can realize cutting.

That is, in the H-section steel, especially in the wide H-section steel, both flange portions Wf are thick and the residual stress is relatively small, whereas the web portion Ww is thin and the residual stress is large. Here, a thick steel material such as the flange portion Wf produces a large amount of slag due to the melting process and adheres to the vicinity of the cut surface, and particularly good melting is difficult at the flange / web intersection. Therefore, cutting work by cutting such as sawing is suitable. On the other hand, a thin steel material such as the web portion Ww is suitable in terms of efficiency and the like as compared with the cutting work by cutting, since the slag is less generated even by the melting work, the cut surface is not particularly deteriorated. Further, in the fusing process, even if there is a large residual stress in the material, problems such as a pinching phenomenon of the tool unlike the cutting process by cutting do not occur.

In the configuration of the present invention, both flange portions W of the H-section steel are formed by the pair of cutting heads 3a and 3b, which are equipped with a rotary cutting tool such as a circular saw blade, and which face each other.
Since f is cut individually and the web portion Ww between them is cut by the cutting head 6 arranged above it, the H-shaped steel can be efficiently produced without the occurrence of bending and pinching of tools. Can be disconnected.

If the fusing head 6 can be fed by the fusing feed mechanism 7 in a two-dimensional manner along a horizontal plane, the fusing head 6 can cut the web portion Ww linearly as well as the web portion Ww.
Holes can be drilled on the w, expanding the applications of the machine.

Since it is advantageous to convey and fix the H-section steel in a state in which both flange portions Wf are normally set up (a state in which the web portion Ww is horizontal), it is advantageous to fix the cutting heads 3 to each other.
By making the cutting directions of a and 3b vertical, it is possible to shorten the contact length of the blade with the material at the time of cutting, and it is convenient that the rotary cutting tool having a small diameter can efficiently cut the flange Wf. The cutting of the flange portion Wf by the left and right cutting heads 3a and 3b, followed by the melting of the web portion Ww by the melting head 6, may be performed after the H-section steel is moved a little forward, but the left and right moving mechanism. When the cutting heads 3a, 3b are retracted in the direction in which they are separated from each other by 5a, 5b, the web portion Ww can be melted while being fixed by the holding mechanism 2 without moving the H-section steel.
Be efficient and accurate.

The control means 100 first cuts both flange portions Wf by the cutting heads 3a, 3b, then retracts the cutting heads 3a, 3b in a direction in which they are separated from each other, and then the web portion Ww is melted by the melting head. By controlling each mechanism based on the procedure described above, it is possible to perform highly efficient and accurate automatic cutting of H-section steel.

Further, if a constant-size feed mechanism 8 for conveying the H-section steel in the longitudinal direction by a set distance is provided, it is possible to cut the H-section steel into a desired cutting length as in the case of an ordinary band saw machine. Automation becomes easy.

Furthermore, the cutting heads 3a and 3b are arranged on the bed 110 which is rotatable with respect to the base 1, and the fusing head 6 is constructed so as to be able to provide two-dimensional feed on a horizontal plane. Also, it can be applied to "beveling", "scalloping", and "flange driving" described later.

[0023]

1 is a front view of an embodiment of the present invention, FIG. 2 is a sectional view taken along the line A--A, and FIG. 3 is a sectional view taken along the line BB thereof.

A material placing table 11 is provided on the bed 1, and a vice mechanism 2 for fixing the H-section steel W to be cut is provided on the material placing table 11. The vise mechanism 2 includes a fixed vise jaw 2a,
The stationary vise jaw 2a is constituted by a moving vise jaw 2b which can be moved toward and away from the fixed vise jaw 2a by driving a cylinder (not shown), and can hold the H-section steel W in a direction orthogonal to its longitudinal direction.

A first cutting head 3a is arranged near the fixed vise jaw 2a of the vise mechanism 2, and a second cutting head 3b is arranged near the moving vise jaw 2b. These are opposed to each other with the H-shaped steel W to be cut sandwiched by the vise mechanism 2 interposed therebetween.
The cutting heads 3a and 3b are heads for mounting and rotating the circular saw blades R, respectively, and rotary shafts 31a and 3 with flanges for mounting the circular saw blades inside the housings, respectively.
1b and a motor 32a, 3 for accommodating the speed reducing mechanism and the like connected to the rotary shafts 31a, 31b and giving rotation to the rotary shafts 31a, 31b via the speed reducing mechanism.
2b and the like. The positions of the cutting heads 3a and 3b are displaced from each other when viewed from the front of the cutting machine. However, when the circular saw blades R are attached to the cutting heads 3a and 3b, the circular saw blades R have a common vertical position. The state is along the cutting plane S of.

The cutting heads 3a and 3b are provided with a downward cutting feed in the vertical direction by cutting feed mechanisms 4a and 4b. That is, the cutting heads 3a and 3b are slidably supported along vertical rails 42a and 42b provided on the columns 41a and 41b, respectively, and vertically displaced by driving the cylinders 43a and 43b. To do.

Further, the cutting heads 3a and 3b are connected to the columns 41a and 41 by the left and right moving mechanisms 5a and 5b.
It is possible to evacuate in the direction toward and away from each other via b. That is, each of the columns 41 a and 41 b includes a rail 51 laid on the bed 1 and extending in the left-right direction.
It is slidably supported along a and 51b, and is displaced in a direction toward and away from each other on a horizontal plane by driving the cylinders 52a and 52b. Each column 41a, 41b
Of these, the movable amount of the column 41b on the moving vise jaw 2b side in the left-right direction is larger than the movable amount of the column 41a on the fixed vise jaw 2a side, and the H-section steel W to be cut. The position of the column 41b can be adjusted according to the width of the column.

A material receiving portion 12 is fixed on the bed 1 at a predetermined distance from the material placing table 11,
The H-section steel W to be cut is composed of the material placing table 11 and the material receiving portion 1.
With both flange parts Wf supported by 2,
The vice mechanism 2 clamps and fixes it from both sides.

A horizontal beam 71 is provided slightly above the columns 41a and 41b so as to extend over both of them.
The beam 71 is located right above the cutting surface S along the cutting surface S of the circular saw blade R of each cutting head 3a, 3b, and slidably supports the fusing head 6. As shown in FIG. 3, the beam 71 has its center portion composed of two rails 71a and 71b which are parallel to each other with a predetermined space therebetween, and the both ends thereof are supported by the columns 13 which are established on the left and right sides of the bed 1. In addition, the fusing head 6 is slidably supported while being sandwiched between the rails 71a and 71b.

The fusing head 6 is for locally fusing and cutting the material, and is composed of, for example, a fusing nozzle 61 composed of a gas torch and a vertical movement mechanism 62 thereof. The fusing head 6 has rails 71a,
By driving the cylinder 73 provided on 71b, the feed in the direction along the guide 71, that is, the feed along the cut surface S is given.

In the embodiment of the present invention described above, first, the H-section steel W to be cut is fixed by the vise mechanism 2 and, as shown in FIG. 1, the left and right cutting heads 3a, 3b.
In the state of being raised, the tip of each circular saw blade R exceeds the flanges Wf of the H-shaped steel W and slightly exceeds the corners R on both sides of the web Ww. Adjust to. In this state, each circular saw blade R is rotationally driven, and the cutting feed mechanism 4a, 4b makes a cut. As a result, as shown in FIG. 4, which is a cross-sectional view of the H-section steel W taken along the cut surface S, the H-section steel W has both flange portions Wf.
Then, both sides of the web portion Ww are partially cut.

Next, the left and right moving mechanisms 5a and 5b are driven,
After retracting the cutting heads 3a and 3b by a certain distance in a direction in which they are separated from each other, as shown in FIG.
Is positioned on one end of the web portion Ww on the side of the cutting head 3a, and the fusing nozzle 61 is lowered right above.
Then, the fusing nozzle 61 is ignited and the fusing head 6 is fed along the rails 71a and 71b. As a result, the central portion of the web portion Ww, which is the uncut portion shown by hatching in FIG. 4, is melted and the H-section steel W is completely cut.

According to the above cutting operation, both flange portions W which are relatively thick and hardly affected by residual stress at the time of cutting
Since f is cut by sawing and the web portion Ww, which is thin and is prone to meat under the influence of residual stress, is cut by fusing, there is no problem in cutting the intersection of the flange and the web, which is difficult in fusing. Moreover, not only does the deterioration of the cut surface due to slag during melting hardly occur, but there is also no phenomenon of bending or saw blade entrapment. Especially when cutting wide H-section steel, a cutting process with a band saw machine is performed. Compared with the above, the required time can be shortened significantly.

If the above-described series of operations is sequentially performed by a control unit mainly composed of a microcomputer, the cutting can be automated. In this case, it is desirable that each cylinder be of a type with a built-in encoder that outputs a pulse signal according to the amount of advance / retreat of the piston. Further, in such automation, as shown in FIG. 2, for example, the driving roller and the driven roller are opposed to each other, and the driving roller is rotated with the H-shaped steel being sandwiched, so that the H-shaped steel is longitudinally moved. It is desirable to add a pinch-roller type feeding device 8a for feeding the material and a sizing device 8 comprising a length measuring disk 8b capable of contacting the H-shaped steel and measuring the feeding distance thereof. It becomes possible to cut the H-section steel automatically under the cutting length of. In this case, as shown in FIG. 5, the electrical configuration of the device is such that a keyboard 101 and a memory 102 are connected to a control unit 100, and cutting information such as a cutting length input from the keyboard 101 is stored in the memory 10.
In addition to storing in 2, the output of the encoder and the measuring disk built into each cylinder is taken into the control unit 100,
Each cylinder and the sizing device are controlled based on the respective output signals, and "H-shaped steel sizing-fixing by vise mechanism 2-cutting of both flange portions Wf by cutting heads 3a, 3b-"
Retracting the cutting heads 3a, 3b-fusing the web portion Ww-
Each part may be driven in the order of "fixing of H-section steel by the vise mechanism 2 to sizing".

FIG. 6 is a front view of another embodiment of the present invention, and FIG. 7 is a sectional view taken along the line AA of the bed 110 in a rotated state. This example is not limited to right-angle cutting in which the cutting surface S with a circular saw blade and a fusing head is cut in a direction orthogonal to the longitudinal direction of the H-section steel, as well as oblique cutting of the H-section steel and "groove processing", " This is an example in which "scalloping" and "flange driving" are possible.

In this example, the cutting heads 3a, 3
b, the cutting feed mechanisms 4a and 4b, and the lateral movement mechanism 5
a, 5b, and the moving vice jaw 200b of the H-shaped steel holding mechanism 200 are arranged on the bed 110 which is rotatable on a horizontal plane with respect to the base 115, and the H-shaped steel holding mechanism. 200 fixed vice jaw 200a is the base 1
It is characterized in that it is arranged above 15 and that the fusing head 6 can be moved two-dimensionally on a horizontal plane.

That is, a bed 110 supported by four wheels 111 is arranged on the base 115, and the bed 110 is rotatable with respect to the base 115 about a vertical axis 112. Has become. A turning cylinder 113 is provided between the bed 110 and the base 115, and the cylinder 113 is driven so that the bed 110 can be turned at an arbitrary angle with respect to the base 115. There is. Then, on the bed 110, a pair of cutting heads 3a and 3b facing each other, the cutting feed mechanisms 4a and 4b, the left and right moving mechanisms 5a and 5b, the material placing table 11, and the material receiving portion, which are exactly the same as in the previous example. 12 are provided.

The vise mechanism 200 includes the fixed vise jaw 2
00a is fixed to a support 201 provided upright on the base 115, and the moving vice jaw 200b is arranged on the bed 110. A plurality of vertical rollers 202 whose left outer circumferences are aligned on the same line as the holding surface of the fixed vise jaw 200a are rotatably supported by the support 201. Further, of the vertical rollers 202, the two vertical rollers 202a at the rearmost end are opposed to each other and can be moved toward and away from each other by a cylinder (not shown), and are rotationally driven by a motor 204 about a vertical axis. A driving roller 203 is provided. The driving roller 203 and the vertical roller 202a constitute a pinch roller type material feeding device, and the driving roller 203 is rotated with the H-shaped steel sandwiched between these rollers. As a result, the H-section steel can be fed in the direction indicated by the arrow in FIG. The amount of material fed is measured by the length measuring disk 205.

Further, three columns 114 are vertically provided on the bed 110, and an XY table 700 capable of displacing the fusing head 6 in a two-dimensional direction along a horizontal plane is fixed thereon. ing. FIG. 8 is a plan view of the XY table 700, in which the first table 701 supporting the fusing head 6 is movable along the first feed screw 702, and the first feed screw 702 is The fusing head 6 is supported by a second table 704 movable along a second feed screw 703 extending in an orthogonal direction, and the fusing head 6 is moved horizontally by a combination of driving of the first and second feed screws 702, 703. The feed can be given in any direction above.

In the above configuration, the two cutting heads 3
The bed 110 is fixed so that the cutting surface S by a and 3b is orthogonal to the material feeding direction, and H is cut by the cutting heads 3a and 3b.
When both the flanges Wf of the shaped steel are cut and the web head Ww is blown by linearly feeding the cutting head 6 along the cut surface S, the H-shaped steel is cut at right angles in exactly the same manner as the previous example. can do.

On the other hand, as shown in FIG. 7, while the bed 110 is rotated at a predetermined angle, the H-shaped steel W is moved to the vise mechanism 2.
When the cutting heads 3a and 3b cut the both flange portions Wf and feed the fusing head 6 linearly along the cutting surface S, the H-shaped steel W swivels the bed 110. It is cut diagonally according to the angle.

Further, in this example, by rotating the bed 110, "beveling" of the flange portion Wf as shown in FIG. 9 can be performed, and of course, "scalloping" as shown in FIG. As a result, it is possible to easily perform particularly troublesome "scalloping with the chasing of the flange portion" as shown in the plan view of the main part in FIG. Beveling is performed by, for example, 35 ° on the cut surface of both flanges Wf of H-section steel.
Is a process for making sufficient welding, and the scallop process is a process for making a U-shaped cut as shown in the inside of the flange of the web portion Ww. As illustrated in FIG. 11, the groove portions of both flange portions Wf and the back side portions thereof are welded to the H-shaped steel column without any excess. Furthermore, the scalloping process with the drive-in of the flange part is
This is a process in which f is pushed further than the tip of the web portion Ww, and a U-shaped cut similar to the above is made in the web portion Ww. As illustrated in FIG. 12, the groove of both flange portions Wf is formed. This is for completely welding the portion and the back side portion thereof to the diaphragm fixed to the prism.

In the groove processing, scalloping or scalloping with the chamfering of the flange portion as described above, the bed 110 is swung at 35 °, for example.
Use one cutting head 3b to remove one flange Wf
After cutting at 5 °, the H-section steel W is advanced, the corresponding position of the other flange portion Wf is cut by the other cutting head 3a, and then both cutting heads 3a, 3b are retreated as necessary. , XY table 700 is driven and controlled,
The web portion Ww is two-dimensionally blown by the fusing head 6 as shown in the drawing.

Conventionally, such scalloping or scalloping with indentation of the flange portion, after the H-section steel is cut at a right angle, as shown in FIG. 13 or 14, the cut end face portion has a required shape. Even though the cutting was performed while generating a large amount of chips, which was extremely troublesome and inefficient, FIG. 15 shows an example of the scalloping with the chasing of the flange portion by the cutting device to which the present invention is applied. As described above, the pre-processing up to the limit that only the P portion needs to be cut off by the cutter is performed, and a great simplification and efficiency are realized.

In the above example, the XY table 700 serving as the feeding mechanism of the fusing head 6 is fixed on the bed 110, but the XY table 700 may be fixed to the base 1. In this case, when performing diagonal cutting, interpolation control of the XY table 700 may be performed so that the fusing head 6 follows the cutting surface S according to the turning angle of the bed 110.

Further, as the feeding mechanism of the fusing head 6, the XY table 700 as described above is provided with two units along the horizontal plane.
If a mechanism capable of feeding in a dimensional manner is adopted, the fusing head 6 not only cuts the cut surface of the web portion Ww two-dimensionally, but also creates a through hole for piping at an arbitrary position of the web portion Ww. It can be used for processing other than cutting, such as punching, and the applications of the machine will be greatly expanded. It is needless to say that such a two-dimensional feed mechanism of the fusing head 6 can be mounted on a cutting machine in which the bed cannot rotate, as illustrated in FIGS. Although groove processing etc. is not possible, the above-mentioned web portion Ww
It is possible to perform through-hole processing or the like at any position of, and similarly, the application of the machine can be expanded.

Further, in each of the above embodiments, the circular saw blade was used as the rotary cutting tool and the gas torch was used as the fusing head, but as described above, the present invention is not limited to these, and a cutting grindstone or the like as the rotary cutting tool. Needless to say, an arc torch such as plasma or an output nozzle of a laser device can be used as the fusing head.

[0048]

As described above, according to the present invention,
A pair of cutting heads for mounting a rotary cutting tool such as a circular saw blade and a cutting feed mechanism thereof are provided on both sides of the H-shaped steel held by a holding mechanism, and above the pair of cutting heads. Since a fusing head such as a gas torch and its feed mechanism are provided, of the various parts of the H-section steel, the flange parts that are relatively thick and are less likely to be affected by residual stress, and the flange-web intersection parts that are difficult to melt It is possible to cut a relatively thin web portion, which is liable to be caught by a saw blade due to residual stress, by a rotary cutting tool, and it is possible to cut the web portion with a cutting head. Unlike the conventional cutting using a band saw machine, there is no phenomenon such as a bending phenomenon or a sandwiching phenomenon of a saw blade, and there is almost no deterioration of a cut surface due to slag. Not hunting, it becomes possible to greatly shorten the time required compared to cleavage by band saw machine.

Further, since the cutting heads are provided for the left and right flanges of the H-section steel, the circular saw blade may have a small diameter such that the flange portion can be cut, which is very cheap.
The machine is much smaller and more compact because it does not use a large-diameter blade.

Further, a bed is provided which is rotatable about a vertical axis with respect to the base, and each cutting head or the like is provided on the bed so that the fusing head can be two-dimensionally fed. In this case, in addition to right-angle cutting and diagonal cutting of H-section steel, groove processing can be performed, and only both flange portions are cut at a predetermined angle, and the web portion is cut into a U-shape.
So-called flange driving and scalloping are also easy, and it is possible to perform complicated H-section steel edge processing extremely easily and in a short period of time compared to the conventional processing method in which a cutter is used after cutting. I can do it now.

Furthermore, when a mechanism capable of feeding the fusing head in a two-dimensional manner is adopted as the fusing feed mechanism, it is possible to perform various machining such as hole machining at any position on the web portion. As a result, the use of the device becomes wider than that of a band saw machine or a general circular saw machine.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a sectional view of an H-section steel according to an embodiment of the present invention during a cutting process.

FIG. 5 is a block diagram showing an electrical configuration example when automating the embodiment of the present invention.

FIG. 6 is a front view of another embodiment of the present invention.

FIG. 7 is a sectional view taken along line AA.

FIG. 8 is an XY table 7 of another embodiment of the present invention.
00 plan view

FIG. 9 is an explanatory diagram of scalloping.

FIG. 10 is an explanatory view of scalloping with a chamfer on the flange portion.

FIG. 11 is an explanatory view of a usage example of H-shaped steel subjected to scalloping.

FIG. 12 is an explanatory diagram of a usage example of H-section steel that has been subjected to scalloping with chasing.

FIG. 13 is an explanatory diagram of conventional scalloping.

FIG. 14 is an explanatory diagram of a conventional scalloping process with drive-in.

FIG. 15 is an explanatory view of a post-processed portion of an H-section steel cut for scalloping with follow-up according to another embodiment of the present invention.

FIG. 16 is a front view showing a general configuration of a band saw machine.

[Explanation of symbols]

 1 Bed 11 Material Placement Table 12 Material Receiving Section 13 Pillar 2 Vise Mechanism 2a Fixed Vise Jaw 2b Moving Vise Jaw 3a, 3b Cutting Head 4a, 4b Cutting Feed Mechanism 41a, 41b Column 42a, 42b Rail 43a, 43b Cylinder 5a, 5b Left and Right Moving mechanism 51a, 51b Rail 52a, 52b Cylinder 6 Fusing head 61 Fusing nozzle 62 Vertical moving mechanism 7 Fusing feed mechanism 71 Beam 73 Cylinder 110 Bed 111 Wheel 112 Vertical shaft 113 Swivel cylinder 114 Pillar 115 Base 200 Vise mechanism 200a Fixed vise Jaw 200b Moving Vise Jaw 202 Vertical Roller 203 Drive Roller 700 XY Table R Circular Saw Blade S Cutting Surface WH Shape Steel Wf Flange Part Ww Web Part

Claims (6)

[Claims] 1. A holding mechanism for fixing the H-section steel to be cut, and a holding mechanism, which is arranged on both sides of the H-section steel fixed by the holding mechanism in a direction orthogonal to the longitudinal direction, to which a rotary cutting tool is attached respectively. A pair of cutting heads, and a cutting feed mechanism that gives cutting feed to each cutting head,
Cutting for H-section steel, comprising a fusing head arranged above the pair of cutting heads, and a fusing feed mechanism for feeding the fusing head at least in a direction connecting the cutting grooves of the respective cutting heads by the rotary cutting tool. Machine. 2. The cutting machine for H-section steel according to claim 1, wherein the fusing feed mechanism is configured to give the fusing head a two-dimensional feed along a horizontal plane. . 3. Each of the cutting heads is provided with a cutting feed in the vertical direction by a respective cutting feed mechanism, and is provided with a left-right movement mechanism for moving these cutting heads toward and away from each other. The cutting machine for H-section steel according to claim 1 or 2, which is characterized. 4. A flange section of H-section steel, which has a control means for controlling each of the above-mentioned mechanisms in a predetermined order, and which feeds each of the cutting heads by cutting feed and is fixed by the holding mechanism. 4. The H according to claim 1, 2 or 3, wherein each mechanism is controlled so as to feed the fusing head to blow the web portion of the H-section steel after cutting the sheet.
Cutting machine for shaped steel. 5. A fixed-length feed mechanism capable of feeding the H-section steel to be cut by a set distance in the longitudinal direction with respect to the holding mechanism. Or the cutting machine for H-section steel as described in 4 above. 6. A bed is provided on the base and rotatable about a vertical axis with respect to the base, the cutting heads are arranged on the bed, and the fusing and feeding mechanism is provided. The cutting machine for H-section steel according to claim 2, 3, 4 or 5, wherein the fusing head is configured so as to be able to provide a two-dimensional feed along a horizontal plane.