JP5116154B2 - Cutting method of shape steel with saw blade - Google Patents

Description

The present invention relates to a method of cutting a section steel made of any one of an H-section steel, an I-section steel, an angle steel, and a channel steel using a circular saw blade.

As shown in FIGS. 8A and 8B, in the conventional cutting method, the saw blade 102 of the saw machine 101 is rotated, and the saw blade 102 is advanced by the hydraulic cylinder 103 and then moved backward, so that the mounting table (not shown). The material to be cut 105 fixed on the top is cut (see, for example, Patent Document 1). Here, reference numeral 111 denotes a rotating shaft of the saw tooth 102, reference numeral 112 denotes a sawing machine carriage for holding the rotating shaft 111, reference numeral 113 denotes a wheel provided on the sawing machine carriage 112, which moves on a rail (not shown), and reference numeral 114 denotes It is a piston rod of the hydraulic cylinder 103. The tip of the piston rod 114 is connected to a protrusion 116 provided at the lower portion of the saw cutter carriage 112 via a pin 115.

JP-A-5-185317

In the case of the sawing machine 101 described in Patent Document 1, the sawtooth 102 penetrates and cuts from the upper surface to the lower surface of the material to be sawed 105, but as shown in FIG. A bridge 104 having a length substantially the same as the tooth width of the saw blade 102 is formed on the back surface of the material 105. Here, as shown in FIG. 9B, while the corner portion of the sawtooth 102 is sharp, that is, immediately after the tooth change, the bridge 104 is sawed on both sides of the bridge 104 when the sawtooth 102 penetrates. The cut material 105 is completely cut and separated from the material to be cut 105 as a cut piece 106. However, when sawing is repeated and the sawtooth 102 is worn and rounded portions 107 are formed as shown in FIG. 9C, both sides of the bridge 104 are simultaneously cut from the material to be sawed 105. As shown in FIG. 9D, it adheres to one of the cut materials and becomes a burr 108.
Further, for example, when the H-shaped steel 109 is cut as the material to be cut, a burr 108 is formed on the side where the saw tooth 102 is cut through as shown in FIG. There is a problem that it is necessary separately. In order to prevent this, a method of changing the shape of the tip of the saw blade 110 to a concave shape in cross section as shown in FIG. It was not practical because of its short life. For this reason, a cutting method that does not generate burrs has been demanded.

This invention is made | formed in view of this situation, and it aims at providing the cutting method by the sawtooth of the shape steel which does not generate | occur | produce a burr | flash even if it repeats the frequency | count of cutting.

The method of cutting a section steel with a saw blade according to the present invention that meets the above-mentioned object is a method of turning a circular saw blade that is rotationally driven from a section steel composed of any one of H-section steel, I-section steel, angle steel, and channel steel. A method of cutting while preventing the occurrence of cutting burrs,
The discarded plate is disposed in a pair on the left and right sides with respect to the saw blade on the cut-out side surface of the shaped steel through which the rotating saw blade cuts through, and the gap between the pair of discarded plates is smaller than the thickness of the saw blade, When the shape steel is cut by the saw blade, the discard plate is also cut.

In the method for cutting a section steel with a saw blade according to the present invention, the discard plate is disposed via a lateral movement mechanism, and the position of the discard plate is operated by operating the lateral movement mechanism every time the section steel is cut by the saw blade. It is preferable to cut the discarded plate by adjusting the thickness.
Thereby, the shape steel can be sawed multiple times using a pair of discarded plates.

In the method for cutting a section steel according to the present invention, it is preferable that the pair of discarded plates is pressed against the section steel by a clamp mechanism.
As a result, the discarded plate can be brought into close contact with the cut-out side surface of the shape steel, and the occurrence of burrs on the cut-out side of the shape steel can be reliably prevented.

In the method of cutting with a saw blade of a section steel according to the present invention, by disposing the discard plate on the cut-out side of the shape steel through which the saw blade passes, the saw-tooth cut-out portion can be moved from the section steel to the discard plate, Occurrence can be limited to the waste board. As a result, it is possible to cut the shape steel without burrs. The discard plates are arranged in pairs on the left and right with respect to the saw blades, and the gap between the pair of discard plates is smaller than the thickness of the saw blades. It can be made smaller, and the consumption of the discarded board can be reduced. Thereby, the cutting with the saw blade of the shape steel which does not generate | occur | produce a burr | flash can be performed many times using one discard board.

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 an explanatory view of a sawing device used in the method of cutting a shaped steel with sawtooth according to the first embodiment of the present invention, and FIG. The top view which shows the state arrange | positioned at the front side of the one flange of steel, and the back side of the other flange, respectively, FIG. 3 (A), (B) is a PP, QQ arrow sectional drawing, FIG. 4 is a cross-sectional plan view of the discard plate holding device, FIG. 5 is a cross-sectional view taken along the line RR in FIG. 4, FIG. 6 is a cross-sectional view taken along the line S-S in FIG. It is explanatory drawing of the cutting method by the sawtooth of the shape steel which concerns.

As shown in FIG. 1, a sawing device 12 for cutting an H-section steel 10, which is an example of a shape steel, by applying a method of cutting a section steel with a sawtooth according to an embodiment of the present invention has a circular sawtooth 14. (For example, the outer diameter D is 2000 to 2200 mm, the width W is 10 to 15 mm), the rotating shaft 13 to which the central portion of the sawtooth 14 is attached, and the rotating shaft 13 connected to the rotating shaft 13 via a drive transmission mechanism (not shown). And a motor 15 for applying a rotational driving force to the motor 13. Further, the sawing device 12 includes a traveling carriage 16 on which the motor 15 and the drive transmission mechanism are placed on the upper front side, a plurality of rollers 17 that support the traveling carriage 16 so as to be horizontally movable, and the rollers 17 at the same height position. And a fluid pressure cylinder 20 that is provided on the rear end side of the movable base 18 and moves the traveling carriage 16 on the roller 17 by moving the piston rod 19 connected to the lower part of the traveling carriage 16 forward and backward. And a fixed base 22 that supports the movable base 18 via a fluid pressure cylinder 21 that is an example of an elevating mechanism. The roller table 11 on which the H-section steel 10 is placed and conveyed is provided on a base (not shown) on which the fixed base 22 is installed via an installation means (not shown).

Next, a method of cutting the H-section steel 10 by applying the cutting method using saw blades of the section steel according to one embodiment of the present invention will be described.
In the first step, first, as shown in FIG. 1, a cutting line formed on the outer surface of the H-shaped steel 10 by transporting the H-shaped steel 10 placed on the roller table 11 so that the web 23 is horizontal. When the position reaches the cutting position set in the sawing device 12, the roller table 11 is stopped. And the H-section steel 10 is fixed on the roller table 11 with the clamping means which is not shown in figure. Thereby, positioning of the H-section steel 10 is completed.

Next, when moving from one flange 24 of the H-section steel 10 (the flange disposed on the sawing device 12 side when the H-section steel 10 is fixed on the roller table 11) toward the other flange 27. The rotation direction of the saw blade 14 is set so that the moving direction of the saw blade 14 and the cutting direction by the rotation of the saw blade 14 are opposite to each other. As shown in FIGS. 1, 2, 3 (A), and 3 (B), on the cutout side of one flange 24 through which the rotating sawtooth 14 cuts out, that is, on the front side (the side opposite to the web 23). Discarding plates 25, 26 are arranged, and discarding plates 28, 29, 30, 31 are arranged on the cut-out side of the other flange 27 through which the rotating sawtooth 14 passes, that is, on the back side surface (the surface on the web 23 side). Further, on the front side of one flange 24 of the H-section steel 10, the height position of the lowest point of the saw blade 14 is lower than the height position of the upper surface of the web 23 by δ (for example, 1 to 5 mm). Adjust (the value of δ may be 1 mm or more and less than the thickness of the web 23). Thereby, the positioning of the sawtooth 14 in the height direction is completed.

The discard plates 25 and 26 are made of, for example, a steel plate having a thickness of 3 to 5 mm, and have the same shape, and are disposed in pairs on the left and right sides of the cutting position of the sawing device 12. Here, it is necessary to adjust the width of the discard plates 25 and 26 to a length that can completely cover the flange 24 from the upper end to the lower end thereof. These are determined according to the dimensions of the discard plate holding devices 32 and 33 for holding them.

The discard plates 28, 29, 30, and 31 are made of, for example, a steel plate having a thickness of 3 to 5 mm, and the shapes thereof are all the same, and the discard plates 28 and 29 are positioned above the web 23, and the sawing device 12. The discarding plates 30 and 31 are disposed below the web 23 in pairs, and are disposed in pairs on the left and right across the cutting position of the sawing device 12. Here, it is necessary to adjust the width of the discard plates 28, 29, 30, and 31 to a length that can completely cover the flange 23 of the other flange 27 from the base position of the web 23 to the front end of the flange. The lengths of the plates 28, 29, 30, and 31 are determined according to the dimensions of the discard plate holding devices 34, 35, 36, and 37 that hold them.

As shown in FIGS. 4 to 5, the discard plate holding device 33 (the discard plate holding device 32 has the same configuration. Also, the discard plate holding devices 34 to 37 have basically the same configuration). A lateral movement mechanism 38 that holds the base side of the discard plate 26 and moves the discard plate 26 along the longitudinal direction of the H-section steel 10 on the front side surface of one flange 24, and the front side (cutting) of the discard plate 26 And a clamp mechanism 39 for pressing the position side) against the front side surface of one of the flanges 24. The lateral movement mechanism 38 includes a first substrate 40 disposed in parallel with the web 23 on the frame of the roller table 11 that conveys the H-section steel 10, and a plurality of support members erected on the first substrate 40. A second substrate 42 arranged in parallel to face the first substrate 40 via 41 (in the discard plate holding devices 34 to 37, the outer surface of the second substrate 42 contacts the web 23); A discard plate mounting member 43 is disposed in parallel with a gap on the surface of one flange 24 and is slidably sandwiched between the first and second substrates 40 and 42. The tip portion of the discard plate mounting member 43 is fixed to the base portion of the discard plate 26 and a bolt 53 which is an example of a fastening member.

Further, the lateral movement mechanism 38 is rotatably supported at both ends by a rack 44 formed along the conveying direction of the H-section steel 10 on the discard plate mounting member 43 and the first and second substrates 40 and 42. A pinion 46 attached to the pinion shaft 45 and meshing with the rack 44 and a rotation drive source 47 for rotating the pinion shaft 45 are provided. Here, the rotation drive source 47, the drive motor 48 attached to the second substrate 42, the first gear 49 attached to the output shaft of the drive motor 48, and the first gear 49 attached to the pinion shaft 45. And a second gear 50 that meshes with the second gear 50. Therefore, when the drive motor 48 is driven, the pinion 46 attached to the pinion shaft 45 can be rotated via the first and second gears 49 and 50. As a result, the discard plate mounting member 43 formed with the rack 44 meshing with the pinion 46 is moved, and the discard plate 26 can be moved along the longitudinal direction on the surface of the one flange 24.

The clamp mechanism 39 includes upper and lower ends sandwiched by the first and second substrates 40 and 42, and a pressing member 51 that contacts the front side of the discard plate 26 attached to the discard plate attachment member 43, and the roller table 11. A direction perpendicular to the longitudinal direction of the H-shaped steel 10 together with the second substrate 42 and the first substrate 40 arranged in the frame (the horizontal direction in FIGS. 5 and 6, the normal direction to the surface of the flange 24) And an advancing / retreating drive source (not shown) that moves forward and backward. By operating the advancing / retreating drive source, the first substrate 40 is moved together with the second substrate 42 toward the one flange 24, so that the discard plate 26 can be brought into contact with the front side surface of the one flange 24. At the same time, the front side of the discard plate 26 can be pressed against the front side surface of one flange 24 by the pressing member 51.

The discard plate holding device 37 (the same applies to the discard plate holding devices 34 to 36. Note that the discard plate holding devices 34 and 35 and the discard plate holding devices 36 and 37 are the same as those of the sawing device 12 (saw tooth 14). 2 can be arranged in an arbitrary manner with respect to the center of the cutting position (relationship between the discarding plate holding devices 34 and 35 in FIG. 2), and the discarding plate holding devices 34 and 35 and the discarding plate holding devices 36 and 37 are provided on the web 23. The discard plate 31 (28 to 30) held by the center position can be arranged in a wrong manner when viewed from the side.) The side surface of the other flange 27 is operated by operating the lateral movement mechanism 38. The outer surface of the second substrate 42 of the discard plate holding device 37 is in contact with the web 23. Further, by operating the advancing / retreating drive source, the first board 40 is moved together with the second board 42 toward the other flange 27 so that the discard plate 31 is brought into contact with the back side surface of the other flange 27. In addition, the front side of the discard plate 31 can be pressed against the back side surface of the other flange 27 by the pressing member 51.

Accordingly, as shown in FIGS. 2, 3A, and 3B, along the front side surface of one flange 24 of the H-section steel 10, the cutting position of the sawing device 12 is sandwiched between the left and right sides (H-section steel). The throwing plates 25 and 26 held by the throwing plate holding devices 32 and 33 arranged before and after the transporting direction 10 are moved by operating the lateral movement mechanism 38, and the gap between the pairing throwing plates 25 and 26 is sawtoothed. The thickness is smaller than 14. Then, the advancing / retreating drive source of the clamp mechanism 39 is operated to press the discard plates 25, 26 against the front side surface of the one flange 24. Further, along the back side surface of the other flange 27 of the H-shaped steel 10, the discard plate holding devices 34, 35 disposed on the left and right sides of the cutting position of the sawing device 12 and on the top and bottom of the web 23, respectively. The discard plates 28, 29, 30, 31 held by 36, 37 are moved by operating the lateral movement mechanism 38, and the gaps between the pair of discard plates 28, 29 and the pair of discard plates 30, 31 are set. The thickness is made smaller than the thickness of the sawtooth 14. Then, the advancing / retreating drive source of the clamp mechanism 39 is operated to press the discard plates 28, 29, 30 and 31 against the back side surface of the other flange 27.

As shown in FIG. 7, in the second step, the fluid pressure cylinder 20 is driven to move the traveling carriage 16 toward the front side (for example, the moving speed is 300 to 500 mm / second), whereby the saw blade 14 is moved to one flange. 24 is cut from the front side of the other flange 27 and passed from the front side of the other flange 27, and a cut is formed on the upper side (one side) of the one flange 24, the web 23, and the other flange 27. Here, when a cut is formed on the upper side of one flange 24, the discard plates 25 and 26 are arranged on the front side surface of the one flange 24 and pressed by the clamp mechanism 39, and the one flange 24 is disposed on the discard plate 25, 4, as shown in FIG. 4, no burr is formed even if the region above the web 23 on the front side surface of one flange 24 becomes the cut-out side of the saw blade 14. In addition, since the area | region above the web 23 on the front side surface of the discard plates 25 and 26 becomes a cut-out side of the sawtooth 14, the burr | flash 52 is formed.

When the cut is formed on the upper side of the web 23, the upper side of the web 23 is the cut side of the saw tooth 14, so that no burrs are generated. Further, when a cut is formed on the upper side of the other flange 27, discard plates 28 and 29 are arranged on the back side surface of the other flange 27 in the region above the web 23 and pressed by the clamp mechanism 39, and the other flange 27 is pressed. Since the upper side of 27 is cut together with the discarding plates 28 and 29, even if the region above the web 23 on the back side of the other flange 27 becomes the cut-out side of the saw blade 14, no burr is formed. In addition, since the area | region above the web 23 in the front side surface of the discard plates 28 and 29 becomes a cut-out side of the sawtooth 14, a burr | flash is formed.

In the third step, the height position of the lowest point of the sawtooth 14 that has passed from the front side of the other flange 27 is adjusted to be lower than the height position of the lower end of the other flange 27. As a result, when the saw blade 14 is cut from the front side of the other flange 27 and is passed from the front side of the one flange 24, the other flange 27, the web 23, and the one flange 24 cut in the second step are cut. Can be cut along the cut.

When the saw blade 14 is cut from the front side of the other flange 27 and the other flange 27 is cut in the fourth step, the discard plates 30 and 31 are arranged in the region below the web 23 on the back side surface of the other flange 27. Since the lower side of the other flange 27 is cut together with the discard plates 30 and 31 by being pressed by the clamp mechanism 39, the area below the web 23 on the back surface of the other flange 27 is the cut-out side of the saw tooth 14. But no burr is formed. In addition, since the area | region below the web 23 on the front side of the discard plates 30 and 31 becomes a cut-out side of the sawtooth 14, a burr | flash is formed.

Furthermore, when the web 23 with the cut is cut from the lower side (back side) along the cut with the saw blade 14, a bridge is formed immediately below the cut of the web 23. Since the shearing force acts when the saw blade 14 penetrates, both sides of the bridge are simultaneously cut by the shearing force, and the bridge is detached from the web 23 as a cutting piece, and no burr is formed. Further, the discard plates 25 and 26 are arranged in the region below the web 23 on the front side surface of the one flange 24 and pressed by the clamp mechanism 39, and the one flange 24 is cut together with the discard plates 25 and 26. Even if the area below the web 23 on the surface of one flange 24 is the cut-out side of the saw tooth 14, no burr is formed. In addition, since the area | region below the web 23 on the front side of the discard plates 25 and 26 becomes a cut-out side of the sawtooth 14, a burr | flash is formed.

As described above, the discard plates 25 and 26 are disposed on the cut-out side (front side surface) of one flange 24 through which the rotating saw blade 14 is cut out, and the discard plate is disposed on the cut-out side (back side surface) of the other flange 27 through which the rotating saw blade 14 is cut through. If 28, 29, 30, and 31 are arrange | positioned, respectively, it can cut | disconnect, without forming a burr | flash on the cut-out side of the flanges 24 and 27. FIG. Then, after the cutting of the H-shaped steel 10 is completed, the advancing / retreating drive source of the clamp mechanism 39 is operated to press the discard plates 25, 26 against the front side surface of one flange 24 and the discard plate 28 against the back side surface of the other flange 27. , 29, 30 and 31 are released. Further, the clamp means is operated to release the fixing of the H-section steel 10 on the roller table 11, the H-section steel 10 is moved on the roller table 11, and the next cutting formed on the outer surface of the H-section steel 10. When the position of the line reaches the cutting position set in the sawing device 12, the roller table 11 is stopped, the H-section steel 10 is fixed to the roller table 11, and the next cutting can be performed.

At this time, by operating the lateral movement mechanism 38 of the discard plate holding devices 32, 33, 34, 35, 36, and 37, the discard plates 25, 26, 28, 29, 30, and 31 are respectively set to the cutting positions of the sawing device 12. Further, the clearances between the pair of discard plates 25 and 26, the discard plates 28 and 29, and the discard plates 30 and 31 are adjusted so as to be smaller than the thickness of the saw blades 14. In this manner, the position adjustment of the discard plates 25, 26, 28, 29, 30, 31 is performed in advance, and the discard plates 25, 26, 28, 29, 30, By cutting 31 together with the H-section steel 10, the saw blade 14 that rotates when the H-section steel 10 is repeatedly sawed is generated on the front side surface of one flange 24 and the back side surface of the other flange 27. Can prevent burrs.

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 present invention can be applied to I-shaped steel, angle steel, and channel steel as the shape steel. The cutting of the I-shaped steel is the same as the cutting of the H-shaped steel, and the cutting of the groove-shaped steel is the same as the cutting of the H-shaped steel when, for example, two groove-shaped steels are combined into an H-shaped steel. Can be done by the method. Furthermore, this cutting method can also be applied to cold and hot sawing of flat steel.

It is explanatory drawing of the sawing apparatus used for the cutting method by the sawtooth of the shape steel which concerns on one embodiment of this invention. It is a top view which shows the state which has arrange | positioned the discard board used as a pair in the cutting method on the front side of one flange of H-section steel, and the back side of the other flange, respectively. (A), (B) is a PP, QQ arrow sectional drawing of FIG. 2, respectively. It is a plane sectional view of a discard board holding device. It is RR arrow sectional drawing of FIG. It is SS arrow sectional drawing of FIG. It is explanatory drawing of the cutting method by the sawtooth of the shape steel which concerns on one embodiment of this invention. (A), (B) is the front view and side view which show the cutting method of the to-be-cut material which concerns on a prior art example. (A)-(D) is explanatory drawing which shows the problem in the cutting method of the to-be-cut material which concerns on a prior art example. (A) is explanatory drawing which shows the condition of the burr | flash which generate | occur | produces when H-section steel is cut | disconnected by the conventional cutting method, (B) is explanatory drawing of a saw blade with a concave sawtooth front-end | tip part.

Explanation of symbols

10: H-section steel, 11: Roller table, 12: Saw cutting device, 13: Rotating shaft, 14: Saw tooth, 15: Motor, 16: Traveling carriage, 17: Roller, 18: Movable base, 19: Piston rod, 20 21: Fluid pressure cylinder, 22: Fixed base, 23: Web, 24: One flange, 25, 26: Discard plate, 27: The other flange, 28, 29, 30, 31: Discard plate, 32, 33: Discard plate holding device, 34, 35, 36, 37: Discard plate holding device, 38: Lateral movement mechanism, 39: Clamp mechanism, 40: First substrate, 41: Support member, 42: Second substrate, 43: Discarding plate mounting member, 44: rack, 45: pinion shaft, 46: pinion, 47: rotational drive source, 48: drive motor, 49: first gear, 50: second gear, 51: pressing member, 52: Bali, 53: Bolt

Claims (3)

A method of cutting a section steel made of any one of H-section steel, I-section steel, angle steel, and groove-section steel while preventing the occurrence of cutting burrs by using a rotationally driven circular saw blade. ,
The discarded plate is disposed in a pair on the left and right sides with respect to the saw blade on the cut-out side surface of the shaped steel through which the rotating saw blade cuts through, and the gap between the pair of discarded plates is smaller than the thickness of the saw blade, A cutting method using a saw blade for a section steel, wherein the discarded plate is also cut when the section steel is cut by the saw tooth. 2. The method of cutting a shaped steel with a saw blade according to claim 1, wherein the discard plate is disposed via a lateral movement mechanism, and the transverse movement mechanism is operated each time the shape steel is cut by the saw tooth. A cutting method using a saw blade of a section steel, characterized in that the discarded plate is also cut by adjusting the position. 3. The method for cutting a section steel with a saw blade according to claim 1, wherein the pair of discarded plates are pressed against the section steel by a clamp mechanism.

Images