JP3355500B2 - H-section steel cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an H-section steel cutting apparatus for high-speed cutting of steel H-section steel used for construction and the like.

[0002]

2. Description of the Related Art As a conventional processing line for a long object such as an H-section steel, a cutting process for cutting into a predetermined length after completion of a drilling process for forming a large number of through holes through which sewer pipes and bolts are inserted. It is usually done in order. As the speed of the processing line is increased, drilling work is being improved, and a drilling machine capable of high-speed processing is being developed. On the other hand, the processing speed is not so much improved as a post-cutting process, and the balance of the processing speed of this drilling-cutting processing line is broken,
When transporting to the cutting device side, the H-section steel that has been subjected to the drilling process is transported by a roller conveyor or the like, and the workpiece (H-section steel) after the drilling process is temporarily stored in standby. For example, as shown in FIG.
Numerical control units (NC) are connected to the drilling device 2 and the drilling device 53, respectively, and the H-section steel, which is a workpiece, is conveyed from the right side. Is perforated. After processing, the conveyor 54
Is conveyed to the cutting device 51. However, since the cutting operation takes time, the slide conveyor 5 provided in the middle is required.
5 or trays 55a, 55b, etc. The stored and drilled H-section steel is carried into the cutting device 51 and cut into a predetermined length, and the cut H-section steel is discharged by the slide conveyor 56. As described above, in the past, it was often stored temporarily in the storage storage unit.

In this cutting apparatus, cutting is started by gradually approaching a cutting blade (round saw blade) called a cold saw from the side surface of the H-shaped steel, and the cutting is completed when the other side surface is cut. The cutting step was completed by retracting the rotary cutting blade from the H-shaped steel. In addition, cutting has also been performed using a seesaw-shaped endless band saw-shaped belt as a cutting blade.

[0004]

However, such H
In the case of the band saw used in the cutting process in a section steel processing line, the width of the H section steel is usually about 1000 mm, and the H section steel is a thin blade having a thickness of about 1 to 2 mm. However, it was difficult to guide the cutting blade to the span for this cutting due to the structure of the cutting device, and the cutting speed (processing speed) could not be increased. Furthermore, in recent years, the width of the H-section steel is 1500 mm, which is often used.

[0005] As described above, since the conventional band saw has a long cutting time, two or more cutting machines are required for one drilling machine in terms of a processing line. Therefore, a space for the factory is also required correspondingly, and peripheral equipment for distributing to a plurality of band saw blades, such as a conveyor and a traverse, are required.

In this case, the saw blade cannot be thickened due to the band / saw mounting structure, so the strength of the saw blade is not sufficient, so that the saw blade flows during the cutting operation and the squareness of the cut surface cannot be obtained. In addition, this saw blade is irreproducible and is not economical because it is disposable. Furthermore, the saw blade feed direction (cutting direction)
Is in one direction (up and down), so the cutting length of the H-shaped steel varies greatly depending on the cutting position. In such an intermittent cutting, vibration is large and greatly affects the life of the blade.

When a cold saw, which is a rotary blade, is used instead of the band saw, there is only one saw blade.
To cut a 00 mm H-section steel, a rotary blade having a diameter of 1400 mm or more was required. Since such a large rotary blade is heavy, mounting work, removal work and polishing work for regeneration are heavy labor, and it takes time, so that the processing time cannot be shortened as a whole. Furthermore, although the cutting speed is higher than the band saw blade, it is slower than the processing speed of the drilling machine, and the processing balance cannot be maintained one-to-one, requiring a sorting machine. As a whole, the processing line could not be speeded up.

As a cutting blade used in the cutting step, a band saw (band saw blade) is mainly used in view of the processing speed. The object of the present invention is to correct the imbalance of the processing balance in the processing line as described above,
An object of the present invention is to provide an H-section steel cutting device capable of increasing the processing speed of cutting and processing a large number of H-section steels in a short time.

It is another object of the present invention to provide an H-section steel cutting device which does not require a sorting device such as a standby conveyor between a drilling machine and a cutting machine in a one-to-one relationship.

[0010]

The above object of the present invention is attained by the following constitution. After punching at a predetermined location, the H-shaped steel is conveyed to the cutting section side by a conveying device, and the cutting blade is approached from the side of the flat plate of the H-shaped steel fixed at the cutting position, and the H-shaped steel is cut to a predetermined length by the cutting blade. In the H-section steel cutting apparatus for cutting, the two cutting blades arranged opposite to the two flat surfaces of the H-section steel fixed at the cutting position are brought close to both side faces of the H-section steel, and cut from both sides. One step, a second step of interrupting the cutting operation from both sides by the cutting blade leaving an uncut part in a part, and retreating both side cutting blades to an initial position, and one or both of the cutting blades The cutting blade is moved perpendicularly to the moving direction of the first step and stopped at a predetermined position, and the cutting blade is moved in parallel with the cutting direction of the first step, or the cutting blade is lowered after being moved in parallel, and the cutting blade is lowered. Cut in the direction to cut the uncut part left in one process And a fourth step in which after completely cutting the H-section steel, the cutting blade, which has contributed to the cutting in the previous step, is moved to the initial position while moving in the reverse direction to the third step. And a process. As a specific mechanism used in such a configuration, a fixing member holding each support member that supports each cutting blade arranged opposite to the two flat surfaces of the H-section steel is opposed to each other along the guide member, It has a configuration in which a driving source for moving in opposite directions and one or both support members are slidably held up and down.
Further, the cutting speed can be improved and improved by the fact that the cutting blade is a rotary blade.

[0011]

According to the H-section steel cutting apparatus of the present invention, two cutting blades rotatably provided on each support member in the first step are mounted on the H-shaped steel cutting apparatus.
The cutting speed is reduced because the H-section steel is cut by moving forward on a straight line in opposition from both sides of the flat face of the section steel, and, moreover,
In the third step, the central uncut portion can be cut by one cutting blade, so that even a large H-section steel can be reliably cut in a short time without being affected by the diameter of the cutting blade. In addition, since the round saw blade is used, the cutting time is short, and the processing balance between the drilling operation and the cutting operation, which has been difficult in the conventional processing line, is maintained, and the processing can be performed in a one-to-one relationship.

[0012]

FIG. 1 is a perspective view of an embodiment of an H-section steel cutting apparatus according to the present invention. FIG. 2 is an enlarged explanatory view of a main part of an embodiment of the H-section steel cutting device according to the present invention. FIG. 3 is an enlarged explanatory view of a main part of another embodiment of the H-section steel cutting apparatus according to the present invention. FIG.
Is a schematic view of an H-beam processing line employing the H-beam cutting device of the present invention, and FIG. 5 is a flowchart of the H-beam cutting device of the present invention. FIG. 6 is a schematic view of a conventional H-section steel processing line.

An H-section steel cutting apparatus according to the present invention will be described with reference to an embodiment shown in the drawings. Reference numeral 1 denotes a cutting device capable of transporting and mounting an H-shaped steel in a central portion. The first rotating blade 2 and the second rotating blade 2a such as a cold saw for cutting can be moved on both left and right sides of the cutting device 1. It is arranged. The first rotary blade 2 and the second rotary blade 2a are connected to respective electric motors 4, 4
The support member 3 is driven via a speed reduction mechanism in the support members 3 and 3a, and one of the support members 3 is guided by a guide track 5a by a servomotor 6 provided on a fixed member 5 and is held so as to be able to move up and down. The support member 3 is screwed to the rotary screw 6a. The fixing member 5 is screwed to a rotary screw 9a rotated by a drive source 9, and is slidably and loosely fitted on rails 7a of the guide plate 7.

Reference numeral 8 denotes a fixing member for restricting the movement of the second rotary blade 2a for cutting the other surface of the H-shaped steel W on the flat plate side, and the other supporting member 3a is fixed. An electric motor 4a, a reduction gear, and a second rotary blade 2a are provided on the support member 3a. The fixing member 8 is slidably fitted to the rails 7a, 7a of the guide plate 7 like the fixing member 5 so as to be slidable, and is screwed to the rotary screw 10a of the drive source 10. With the movement of the fixed member 8 by the driving source 10, the supporting member 3a is moved together with the second rotary blade 2a by the first rotary blade 2a.
And moves in the cutting direction.

Reference numeral 11 denotes a base of the cutting device 1 on which a portal frame 12 for fixing and supporting the guide plate 7 is mounted. The base 11 has a guide groove 15 for the first rotary blade 2 and the second rotary blade 2a. A fixed vise 13a for cutting and positioning the H-shaped steel W is disposed on the base 11 near the second rotary blade 2a, and is brought into contact with the parallel plate surface of the H-shaped steel W. On the other hand, on the first rotary blade 2 side, the other H
A moving vise 13 is provided to abut the parallel plate surface of the section steel W. The lower surface of the H-section steel W is supported by the lower support device 14.

The H-section processing line 20 includes a drilling process 21
Is arranged. Reference numeral 22 denotes H after the drilling step 21 has been completed.
This is a conveyor for conveying the section steel to the cutting device 1. 23 is a sorting step in a conventional processing line.

A cutting operation of an H-section steel cutting apparatus according to an embodiment of the present invention will be described below with reference to FIG. In the H-section processing line 20 shown in FIG.
The H-section steel W after the drilling step 21 is conveyed to the slide conveyor by the conveyor 22, where it is temporarily put on standby and conveyed to the cutting device 1.

The transported H-section steel W is fixed vise 13a,
It is fixed at the cutting position by the moving vise 13 and the supporting device 14. The drive sources 9 and 10 are driven to rotate the rotary screws 9a and 10a, and the fixed members 5 and 8 are guided by the rails 7a and 7a of the guide plate 7 to slide. Each of them moves toward the side surfaces of the two parallel plates of the H-section steel W, and the cutting edges of the first rotary blade 2 and the second rotary blade 2a abut on the side surfaces of the H-section steel W to start cutting. When the cutting of the two parallel plates of the H-section steel W is completed, the cutting operation is temporarily stopped, and the two rotary blades 2 and 2a are moved together with the support member 3 into the driving sources 9 and
The rotary screws 9a and 10a are rotated by 10 to retract to the initial position.

Next, the support member 3 screwed to the rotary screw 6a by driving the servo motor 6 is guided by the orbit of the fixed member 5 and rises. Therefore, the first rotary blade 2 also rises,
It stops when the cutting edge of the first rotary blade 2 is located below the central portion of the H-section steel W. When the drive source 9 operates,
The fixing member 5 is moved in the lateral direction as in the first step, and the electric motor 4 is operated to rotate the first rotary blade 2. The parallel movement of the fixing member 5 cuts the central portion of the H-shaped steel W, and stops the electric motor 4 and the drive source 9 when the uncut portion in the first step is completely cut. (2nd process)

The driving screw 9 reverses the rotation screw 9a,
The fixing member 5 is retracted to the initial position. Then, the support member 3 is lowered by the servomotor 6 and returned to the cutting start position. (Third Step) The H-section steel W cut by such a step is retracted from the moving vise 13 and the supporting device 14, conveys the H-section steel W, is discharged from the cutting device 1, and is discharged to the next H-section steel. The H-shaped steel W waiting on the slide conveyor is transferred to the cutting position of the cutting device 1.

According to the second embodiment shown in FIG. 3, the first rotary blade 2 and the second rotary blade 2a are cut from both sides of the H-shaped steel W by driving the drive sources 9 and 10, The first rotary blade 2 and the second rotary blade 2a stop at about ／ of the radius of the first rotary blade 2 and the second rotary blade 2a, and leave the central portion uncut, leaving the first rotary blade 2 and the second rotary blade 2a, and the support member. 3, 3a and the like are retracted to the initial position together with the fixing members 5, 8. Next, the support member 3 is raised by the servo motor 6 along the trajectory of the fixed member 5. At a position distant from the parallel plate of the H-section steel W, the servomotor 6 is stopped, the drive source 9 is started, and the first rotary blade 2 and the support member 3 are moved by the rotary screw 9a via the fixed member 5 to the guide plate 7. And stops at the position of the uncut portion in the second step, and the servo motor 6 is started and the support member 3
And cut the uncut portion of the H-section steel W by the first rotary blade 2 (dotted line of the rotary blade 2). After cutting is complete,
Is raised, and the supporting member 3 is returned to the initial position by moving in the opposite direction to the above-described moving step.

As described above, the H-section steel cutting apparatus according to the present invention can cut at the cutting position by using two rotary blades, and cut the central portion by moving only one of the rotary blades upward. H in a shorter time than before
Shaped steel can be cut. In this embodiment, FIG. 1 shows an apparatus for cutting an H-section steel by moving only one of the cutting devices (rotary blades) upward and moving it down at a central position.
Depending on the size of the H-section steel, both cutting devices (cutting blades) are raised, approaching the central portion of the H-section steel from both sides, and lowering these cutting blades at predetermined positions to cut the H-section steel. You can also.

Although two driving sources are provided in the above-described embodiment, a single driving source may be used to move the fixing members 5 and 8 from opposite sides with a clutch mechanism interposed.
For example, the rotary screw 10a on the drive source 10 side may be cut into a reverse screw. A one-way clutch may be interposed between the rotary screw 10a and the fixing member 8.

[0024]

The H-section steel cutting apparatus of the present invention makes it possible to cut by bringing rotating blades into contact with both side surfaces of each horizontal plate at both ends of the H-section steel and cut in a short time. After drilling, both processes can be processed in a one-to-one relationship without stagnation in the transport process by conveyor rollers or the like. Therefore, the H-section steel can be continuously processed.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment of an H-section steel cutting apparatus according to the present invention.

FIG. 2 is an enlarged explanatory view of a main part of an embodiment of an H-section steel cutting device according to the present invention.

FIG. 3 is an enlarged explanatory view of a main part of another embodiment of the H-section steel cutting device of the present invention.

FIG. 4 is a schematic diagram of an H-beam processing line employing the H-beam cutting device of the present invention.

FIG. 5 is a flow chart of the H-section steel cutting device of the present invention.

FIG. 6 is a schematic view of a conventional H-section steel processing line.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cutting device 2, 2a ... Rotating blade 3, 3a ... Support member 4, 4a ... Electric motor 5 ... Fixing member 6 ... Servo motor 7 ... Guide plate 8 ... Fixing member 9, 10 ... Drive source 9a, 10a ... Rotating screw DESCRIPTION OF SYMBOLS 11 ... Base 12 ... Gate type frame 13 ... Moving vise 14 ... Supporting device

Claims (5)

(57) [Claims] After a hole is drilled at a predetermined position, the sheet is conveyed to a cutting portion by a conveying device, and a cutting blade is approached from the side of a flat plate of the H-section steel fixed at the cutting position.
In an H-section steel cutting apparatus for cutting a section steel to a predetermined length, two cutting blades arranged opposite to two flat surfaces of the H section steel fixed at a cutting position are provided on both side faces of the H section steel. A first step of approaching and cutting from both sides; a second step of interrupting the cutting operation from both sides by the cutting blade leaving a partially uncut portion, and retracting both cutting blades to an initial position; Moving one or both of the blades upward in a direction perpendicular to the moving direction of the first step, stopping at a predetermined height position, and moving the cutting blade in a direction to cut the uncut portion left in the first step; A third step of, after completely cutting the H-shaped steel, retracting the cutting blade, which has contributed to the cutting in the previous step, to an initial position while moving the cutting blade in a return direction opposite to the third step. The cutting blades are always kept at the cutting start position. H-beam cutting device. 2. In the third step, after the cutting blade is moved upward in a direction perpendicular to the moving direction of the first step, the cutting blade stops at a position where the cutting edge can cut the central plate of the H-section steel. 2. The H-section steel cutting apparatus according to claim 1, further comprising a step of cutting an uncut portion of a previous step while moving in parallel with a cutting direction of the first step. 3. The cutting in the first step includes moving the cutting blade upward in a direction perpendicular to the moving direction of the first step, stopping at a predetermined height away from the H-beam. After moving in parallel with the direction, the cutting blade is lowered and H
The H-section steel cutting device according to claim 1, wherein the step is a step of cutting an uncut portion of a central portion of the section steel from above. 4. After a hole is drilled at a predetermined position, the sheet is conveyed to a cutting section by a conveying device, and a cutting blade is approached from the side of the flat plate of the H-section steel fixed at the cutting position.
An H-section cutting device for cutting a section steel to a predetermined length, comprising: two cutting blades for cutting from both flat sides of the H-section steel; two electric motors for driving these cutting blades; A support member for supporting the cutting blade; a fixing member for holding the support member so as to be movable in a lateral direction in which the cutting blades face each other; and A drive source for reciprocating in the direction, and a drive mechanism for vertically sliding the support member on one or both of the fixed members, wherein each fixed member having each support member and each cutting blade is provided to the guide member. And a support member having one or both of the cutting blades is held on a fixed member so as to be vertically movable by the action of the driving source. Stated H-section steel cutting device. 5. The H-section steel cutting device according to claim 1, wherein said cutting blade is a rotary blade.