JP2010274357A - Device and method for cutting steel square pipe material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and a method for sharply cutting a steel square pipe material at any length position without deforming cutting parts of both of the squire pipes after cutting even when a wall thickness of a peripheral wall is 2.3 mm. <P>SOLUTION: Lower blades 3, 3 in front and behind and a plate shaped upper blade 4 are provided, the lower blades 3, 3 include orthogonal recess V shaped blade surface parts 3a, 3a and the upper blade 4 includes an obtuse protrusion V shaped blade surface part 4a and a distal end sharp part 4b. Retainers 5, 5 obstructing floating of both sides sandwiching a cutting part during cutting of the steel square pipe material 2 supported by the orthogonal recess V shaped blade surface parts 3a, 3a of the lower blades 3, 3 are provided in front and behind the lower blades 3 in such a manner of freely advancing and retreating, the retainers 5, 5 are made to be in an advancing state, and the upper blade 4 is lowered, and the steel square pipe material 2 is cut. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an apparatus and method for cutting a steel square pipe material.

  Various cutting devices and cutting methods for cutting steel pipe materials have been provided.

Japanese Patent Laid-Open No. 10113727

  However, a steel square pipe material, in particular, a steel square pipe material used as a steel shell edge material having a wall thickness dimension of a peripheral wall of, for example, 2.3 mm, is an object to be cut, and is provided at an arbitrary length position. However, a cutting device or a cutting method that can cut a sputter without deforming any of the cut portions of the double-sided pipe material after cutting has not yet been provided.

  In view of the above-described problems, the present invention provides, for example, a steel square pipe material as described above, in which the cut portion of the double-angled pipe material after cutting is arbitrarily selected at any length position. It is another object of the present invention to provide a cutting device and a cutting method that can cut the spatter without deformation.

The above-mentioned problem is that the two adjacent sides on the upper side of the steel square pipe material with any corner on the lower side are free, and the lower side along the entire circumferential length of the remaining two adjacent lower sides The front and rear lower blades having a right-angled concave V-shaped blade surface portion for supporting the steel square pipe material on the two sides are provided so that the right-angled concave V-shaped blade surface portion has a predetermined clearance in the front-rear direction. With
A plate-like upper blade is provided at a height position above the steel square pipe material supported by the right-angled concave V-shaped blade surface portions of the lower blades,
The plate-like upper blade has a width dimension larger than a distance dimension between the left and right corners of the steel square pipe member supported on the right-angled concave V-shaped blade surface part of the lower blade, and has the right-angled concave at the lower end part. It has an obtuse-angled convex V-shaped blade surface that has a convex obtuse angle V-shape that is wider than V-shaped V,
The obtuse convex V-shaped blade surface is perpendicular to the plate surface, and at the tip of the obtuse convex V-shaped blade surface, a steel square pipe material supported by the right-angled concave V-shaped blade surface of both lower blades. A sharp part cut into the corner located on the upper side of the
After the plate-shaped upper blade is lowered toward the right and left concave V-shaped blade surfaces of the front and rear lower blades, the sharp edge portion is cut into the corner located on the upper side of the steel square pipe material, and then the sharp edge portion is cut. The blade surfaces on both sides sandwiching the part will break the two side plate parts sandwiching the corner located on the upper side of the steel square pipe material, and then the corner located on the lower side of the steel square pipe material The two sides sandwiched between the right-sided concave V-shaped blade surface portion of one lower blade and the obtuse convex V-shaped blade surface portion of the upper blade, and the right-sided concave portion of the obtuse convex V-shaped blade surface portion of the upper blade and the other lower blade Fracture is caused by the shearing action of the V-shaped blade surface, and after that, through the process of cutting off a cutting scrap having a thickness equivalent to the thickness of the plate-like upper blade from the steel square pipe material, It is designed to cut square pipe material, and
Before and after sandwiching the front and rear lower blades, pressers that prevent lifting on both sides sandwiching the cut portion during cutting of the steel square pipe material supported by the right-angle concave V-shaped blade surface portion of the lower blade are provided to be able to advance and retreat. This is solved by a cutting device for a steel square pipe material (first invention).

  In addition, using the cutting device of the first invention, after setting the steel square pipe material so as to extend to the right-angled concave V-shaped blade surface portions of the front and rear lower blades, the front and rear pressers are set to the advanced state, and the steel This is solved by a method for cutting a steel square pipe material, characterized in that both sides sandwiching the cut portion of the pipe material are lifted and prevented, the upper blade is lowered, and the steel square pipe material is cut (second). invention).

  In the first and second inventions described above, the steel square pipe material is cut at both lengths after cutting the steel square pipe material at an arbitrary length position by integral organic connection of the front and rear lower blades, the plate-like upper blade, and the presser. It is possible to cut the pipe material without any deformation.

  That is, in the steel square pipe material supported by the front and rear lower blades, the two adjacent upper sides are free, but the square pipe material is configured to cut diagonally, and the upper blade has An obtuse-angled convex V-shaped blade surface portion having a convex obtuse angle V-shape that is wider than the right-angled concave V-shaped V of the lower blade is provided, and a sharp portion is provided at the tip of the obtuse-angled convex V-shaped blade surface portion. By lowering the plate-shaped upper blade toward the right and left concave V-shaped blade surface portions of the front and rear lower blades, the sharp end of the tip can be cut into the corner located on the upper side of the steel square pipe material, The blade surface portions on both sides sandwiching the sharp portion break the free two-side plate portion located on the upper side of the steel square pipe material.

  And, in the process of breaking the free two-side plate part located on the upper side of the steel square pipe material in this way, both sides sandwiching the cut part of the steel square pipe material are made to be in a state of preventing lifting by pressing. Thus, it is prevented that the two cut surface portions on the two free upper sides of the steel square pipe material are pressed against the plate surface portions on both sides of the upper blade, and thereby the steel square pipe material is It is possible to cut the pipe material without any deformation.

  Since the steel square pipe material cutting apparatus and method according to the present invention are as described above, the steel square pipe material is cut at any length position, and both the cut portions of the double-angle pipe material after cutting are cut. It can be cut off without deformation.

The cutting device of embodiment is shown, A figure (I) is a front view, A figure (B) is a cross-sectional side view. FIG. 1A is a perspective view of the cutting device, and FIG. 1C is a cross-sectional perspective view of a steel square pipe material. Drawing (a)-figure (C) are sectional side views which show a cutting method and a cutting process one by one with Drawing 4 (d)-(f). FIGS. (D) to (f) are sectional side views sequentially showing a cutting method and a cutting process together with FIGS.

  Next, embodiments of the present invention will be described with reference to the drawings.

  The cutting device 1 shown in FIGS. 1 (a) and (b) and FIG. 2 (a) cuts a square steel pipe 2 having a square cross section as shown in FIG. 2 (b) at an arbitrary length position. In the cutting apparatus 1, 3 and 3 are front and rear lower blades, 4 is a plate-like upper blade, and 5 and 5 are front and rear pressers.

  As shown in FIGS. 1 (a) and 2 (a), the front and rear lower blades 3, 3 are free on the two adjacent sides on the upper side of the steel square pipe material 2 with one of the corners down. However, it is provided with right-sided concave V-shaped blade surface portions 3a and 3a that support the steel square pipe material on the two lower sides along the entire circumferential length of the two adjacent lower sides. The right-angled concave V-shaped blade surface portions 3a and 3a are provided so as to have a predetermined gap interval in the front-rear direction, specifically, a gap interval substantially matching the plate thickness dimension of the plate-like upper blade 4.

  The plate-like upper blade 4 is provided at a height position above the steel square pipe material 2 supported by the right-angled concave V-shaped blade surface portions 3a, 3a of the lower blades 3, 3, and the width dimension thereof is , Larger than the distance between the left and right corners of the square steel pipe material 2 supported by the right-angled concave V-shaped blade surface portions 3a, 3a of the lower blades 3, 3, and the right-angled concave V-shaped blade surface portion at the lower end. 3a, 3a is provided with an obtuse-angled convex V-shaped blade surface portion 4a having a convex obtuse-angled V shape that is wider than the right-angled concave V-shaped V.

  The obtuse-angled convex V-shaped blade surface part 4a is perpendicular to the plate surface 4c, and the obtuse-angled convex V-shaped blade surface part 4a has a right-angled concave V-shaped blade surface part 3a, 3a at the tip of the obtuse-angled convex V-shaped blade surface part 4a. A sharp part 4b is provided to cut into a corner located on the upper side of the steel square pipe member 2 to be supported.

  The plate-like upper blade 4 can be lowered from above the steel square pipe material 2 toward the space between the right and left concave V-shaped blade surface portions 3a, 3a of the lower blades 3, 3.

  The pressers 5 and 5 prevent the lifting of both sides sandwiching the cut portion during cutting of the steel square pipe material 2 supported by the right-angled concave V-shaped blade surface portions 3a and 3a of the lower blades 3 and 3, It is provided before and after sandwiching the lower blades 3 and 3. Each presser 5 is provided at the tip end of the piston rod 7 of the hydraulic cylinder 6, and moves forward and backward by driving the cylinder 6, and is brought into the advanced state, whereby the right-sided concave V-shaped blades of the lower blades 3 and 3. The steel square pipe material 2 supported on the surface portions 3a, 3a is brought into a close state or a contact state with the corner located on the upper side, and the steel square pipe material 2 is lifted on both sides sandwiching the cut portion during cutting. It is made to stop.

  Moreover, the cutting apparatus 1 of this embodiment is provided with front and rear feed bases 8 and 9 made of a roller-type conveyor or the like before and after the front and rear lower blades 3 and 3, and the upper surface height of the front and rear feed bases 8 and 9. The steel square pipe material 2 placed on the rear feed base 8 is positioned so as to substantially coincide with the height of the valley bottom of the right-angled concave V-shaped blade surface portions 3a, 3a of the front and rear lower blades 3, 3. Is projected to the front feed base 9 side by a desired length through the front and rear lower blades 3, 3, so that the steel square pipe material 2 can be in a setting state for cutting. In addition, after cutting, the cut steel square pipe material on the front side can be sent out to the front feed base and taken out.

  In the present embodiment, the front and rear pressers 5 and 5 and the front and rear feed bases 8 and 9 sandwich the steel square pipe material 2 from above and below. It can be positioned at a predetermined position in the front-rear direction.

  The steel square pipe material 2 is cut using the cutting device 1 as follows. That is, as shown in FIGS. 3 (A) and 3 (B), the steel square pipe material 2 placed on the rear feed base 8 is passed through the lower blades 3 and 3 to the front feed base 9 in a predetermined manner. After setting the cutting device by projecting the length dimension, the front and rear pressers 5 and 5 are set to the advanced state as shown in FIG. Thereafter, as shown in FIGS. 4 (d) to 4 (f), the plate-like upper blade 4 is moved from above the square steel pipe material 2 to the right and left lower blades 3, 3 at the right angle concave V-shaped blade surface portion 3a, Take down towards 3a.

  Thus, after the sharp edge portion 4b of the upper blade 4 is cut into the corner located on the upper side of the steel square pipe material 2, the blade surface portions on both sides sandwiching the sharp portion 4b as shown in FIG. However, the two side plate portions sandwiching the corner portion located on the upper side of the steel square pipe material 2 are broken, and thereafter, on the lower side of the steel square pipe material 2 as shown in FIG. The two sides of the plate sandwiching the corners positioned are a right-angled concave V-shaped blade surface portion 3a of one lower blade, an obtuse angle convex V-shaped blade surface portion 4a of the upper blade, and an obtuse angle convex V-shaped blade surface portion 4a of the upper blade. The other lower blade is broken by the shearing action of the right-sided concave V-shaped blade surface portion 3a, and then, as shown in FIG. 4 (f), the thickness dimension equivalent to the thickness dimension of the plate-like upper blade 4 The steel square pipe material 2 is cut through a process in which the cut residue 10 is cut from the steel square pipe material 2.

  In the process shown in FIG. 4D in this cutting process, both sides sandwiching the cut portion of the steel square pipe material 2 are prevented from being lifted by the pressers 5 and 5, so that the steel square pipe material 2 The two cut surface portions on the two free upper sides are not pressed against the plate surface portions on both sides of the upper blade 4, thereby cutting the steel square pipe material 2 into the cut two-angle pipe materials 2 and 2. The parts 2a and 2a can be sputtered without any deformation.

  Moreover, in this embodiment, the front and rear feed bases 8 and 9 are provided, and the upper blade 4 descends between the lower blades 3 and 3 at the front and rear, and below the steel square pipe material. The two sides of the plate sandwiching the corners positioned are a right-angled concave V-shaped blade surface portion 3a of one lower blade 3, an obtuse-angled V-shaped blade surface portion 4a of the upper blade 4, and an obtuse-angled convex V-shaped blade of the upper blade 4. The combination of adopting a cutting method of breaking by the shearing action of the right-sided concave V-shaped blade surface portion 3a of the surface portion 4a and the other lower blade 3 allows the steel square pipe material before and after cutting to be It can be kept at the same height position, and the cut steel square pipe material can be smoothly fed using the front and rear feed bases 8 and 9.

  Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, in the above-described embodiment, the case where the steel square pipe material 2 is made of a square cross section is shown, but the steel square pipe material may be made of a rectangular cross section, in which case Is an upper side of a rectangular steel pipe member having a rectangular cross-section that is supported by the lower blade 3 right-angle concave V-shaped blade surface portion 3a as the plate-like upper blade 4 with the tip sharpened portion 4b decentered laterally from the center position in the width direction. The thing of the form which can be located just above the corner part of is good.

DESCRIPTION OF SYMBOLS 1 ... Cutting device 2 ... Steel square pipe material 3 ... Lower blade 3a ... Right angle concave V-shaped blade surface part 4 ... Plate-shaped upper blade 4a ... Obtuse angle convex V-shaped blade surface part 4b ... Sharp edge part 5 ... Presser 10 ... Cutting residue

Claims (2)

While the two adjacent sides on the upper side of the steel square pipe material with one of the corners on the bottom are free, the two lower sides along the entire length in the circumferential direction of the remaining two adjacent lower sides The front and rear lower blades having a right-angled concave V-shaped blade surface portion for supporting the steel square pipe material are provided so as to leave a predetermined gap interval in the front-rear direction.
A plate-like upper blade is provided at a height position above the steel square pipe material supported by the right-angled concave V-shaped blade surface portions of the lower blades,
The plate-like upper blade has a width dimension larger than a distance dimension between the left and right corners of the steel square pipe member supported on the right-angled concave V-shaped blade surface part of the lower blade, and has the right-angled concave at the lower end part. It has an obtuse-angled convex V-shaped blade surface that has a convex obtuse angle V-shape that is wider than V-shaped V,
The obtuse convex V-shaped blade surface is perpendicular to the plate surface, and at the tip of the obtuse convex V-shaped blade surface, a steel square pipe material supported by the right-angled concave V-shaped blade surface of both lower blades. A sharp part cut into the corner located on the upper side of the
After the plate-shaped upper blade is lowered toward the right and left concave V-shaped blade surfaces of the front and rear lower blades, the sharp edge portion is cut into the corner located on the upper side of the steel square pipe material, and then the sharp edge portion is cut. The blade surfaces on both sides sandwiching the part will break the two side plate parts sandwiching the corner located on the upper side of the steel square pipe material, and then the corner located on the lower side of the steel square pipe material The two sides sandwiched between the right-sided concave V-shaped blade surface portion of one lower blade and the obtuse convex V-shaped blade surface portion of the upper blade, and the right-sided concave portion of the obtuse convex V-shaped blade surface portion of the upper blade and the other lower blade Fracture is caused by the shearing action of the V-shaped blade surface, and after that, through the process of cutting off a cutting scrap having a thickness equivalent to the thickness of the plate-like upper blade from the steel square pipe material, It is designed to cut square pipe material, and
Before and after sandwiching the front and rear lower blades, pressers that prevent lifting on both sides sandwiching the cut portion during cutting of the steel square pipe material supported by the right-angle concave V-shaped blade surface portion of the lower blade are provided to be able to advance and retreat. An apparatus for cutting a steel square pipe material.   Using the cutting device according to claim 1, after setting the steel square pipe material so as to extend over the right-angled concave V-shaped blade surface portion of the front and rear lower blades, the front and rear pressers are set to the advanced state, and the steel squares are moved by the pressers. A method for cutting a steel square pipe material, characterized in that both sides sandwiching the cut portion of the pipe material are lifted and prevented, the upper blade is lowered, and the steel square pipe material is cut.

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