JP2011025314A - Apparatus for manufacturing bent member having correction function and method for manufacturing bent member - Google Patents

Apparatus for manufacturing bent member having correction function and method for manufacturing bent member Download PDF

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JP2011025314A
JP2011025314A JP2010146611A JP2010146611A JP2011025314A JP 2011025314 A JP2011025314 A JP 2011025314A JP 2010146611 A JP2010146611 A JP 2010146611A JP 2010146611 A JP2010146611 A JP 2010146611A JP 2011025314 A JP2011025314 A JP 2011025314A
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bending
bending member
heated
bent
downstream
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JP5589609B2 (en
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Atsushi Tomizawa
淳 富澤
Kenji Yamamoto
憲司 山本
Nobuhiro Okada
信宏 岡田
Naoaki Shimada
直明 嶋田
Hiroaki Kubota
紘明 窪田
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Nippon Steel Corp
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Sumitomo Metal Industries Ltd
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<P>PROBLEM TO BE SOLVED: To provide an apparatus for manufacturing a bent member including correction function and a method for manufacturing the bent member. <P>SOLUTION: The apparatus 10 for manufacturing a bent member 21 includes: a supporting means 11 for supporting an intermediate member 20 in a first position A while feeding the intermediate member 20 relatively in the longitudinal direction; a working means 12 for manufacturing the bent member 21 by partially heating the intermediate member 20 which is fed in a second position B, cooling the portion heated in the second position B in a third position C, also performing bending work to the intermediate member 20 by imparting a bending moment to the heated portion by changing the position of a clamping means for clamping the intermediate member 20 in the two dimension or the three dimension in the downstream region D of the third position C; a measuring means 13 for measuring the three dimensional shape of the part to be bent of the bent member 21; and a correcting means 14 for performing the correction work for correcting the three dimensional shape before bent working the intermediate member 20 to which bending work is performed after this bent member 21 on the basis of the measured result by the measuring means 13. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、補正機能を有する屈曲部材の製造装置および屈曲部材の製造方法に関し、具体的には、軽量かつ小型であるとともに優れた寸法精度を有する屈曲部材を製造することができる、補正機能を有する屈曲部材の製造装置および屈曲部材の製造方法に関する。   The present invention relates to a bending member manufacturing apparatus and a bending member manufacturing method having a correction function, and more specifically, a correction function capable of manufacturing a bending member that is lightweight and small and has excellent dimensional accuracy. The present invention relates to a bending member manufacturing apparatus and a bending member manufacturing method.

周知のように、自動車や各種機械等に用いられる、屈曲した形状を有する金属製の強度部材、補強部材または構造部材には、高強度、軽量かつ小型であること等が求められる。従来より、この種の屈曲部材は、例えば、プレス加工品の溶接、厚板の打ち抜き、さらには鍛造等により製造されてきた。しかし、これらの製造方法により製造される屈曲部材の軽量化および小型化には限界があり、その実現は容易なことではない。   As is well known, a metal strength member, reinforcement member, or structural member having a bent shape used in automobiles or various machines is required to have high strength, light weight, and small size. Conventionally, this type of bending member has been manufactured by, for example, welding of a press-processed product, punching of a thick plate, and further forging. However, there is a limit to the weight reduction and size reduction of the bending member manufactured by these manufacturing methods, and the realization thereof is not easy.

近年では、例えば非特許文献１に開示されるように、いわゆるチューブハイドロフォーミング工法によりこの種の屈曲部材を製造することも積極的に検討されている。非特許文献１の２８頁にも記載されているように、チューブハイドロフォーミング工法は、素材となる材料の開発や成形可能な形状の自由度の拡大等といった課題を有しており、今後よりいっそうの開発が必要である。   In recent years, for example, as disclosed in Non-Patent Document 1, it has been actively studied to manufacture this type of bending member by a so-called tube hydroforming method. As described on page 28 of Non-Patent Document 1, the tube hydroforming method has problems such as the development of materials to be used as raw materials and the expansion of the flexibility of shapes that can be formed. Development is necessary.

このような現状に鑑み、本出願人は、先に特許文献１により曲げ加工装置に係る発明を開示した。図７は、この曲げ加工装置１の概略を示す説明図である。
図７に示すように、この曲げ加工装置１は、基本的に、支持手段２、２によりその軸方向へ移動自在に支持された金属材３を上流側から下流側へ向けて送り装置４により送りながら、支持手段２、２の下流で曲げ加工を行う曲げ加工方法を用いて屈曲部材５を製造するものである。すなわち、支持手段２、２の下流で高周波加熱コイル６により金属材３を部分的に焼入れが可能な温度域に急速に加熱するとともに高周波加熱コイル６の下流に配置される水冷装置７により金属材３を急冷する。そして、金属材３を送りながら支持可能であるロール対８ａ、８ａを少なくとも一組有する可動ローラダイス８の位置を二次元又は三次元で変更して金属材３の加熱された部分に曲げモーメントを付与することにより、金属材３に曲げ加工を行う。このため、曲げ加工装置１によれば、高い作業能率で屈曲部材５を製造することができる。 In view of such a current situation, the present applicant previously disclosed an invention relating to a bending apparatus according to Patent Document 1. FIG. 7 is an explanatory view showing an outline of the bending apparatus 1.
As shown in FIG. 7, the bending apparatus 1 basically includes a metal material 3 supported by support means 2 and 2 so as to be movable in the axial direction from the upstream side to the downstream side by the feeding device 4. The bending member 5 is manufactured using a bending method in which bending is performed downstream of the support means 2 and 2 while feeding. That is, the metal material 3 is rapidly heated to a temperature range in which the metal material 3 can be partially quenched by the high-frequency heating coil 6 downstream of the support means 2 and 2 and the water-cooling device 7 disposed downstream of the high-frequency heating coil 6 3 is rapidly cooled. Then, the position of the movable roller die 8 having at least one pair of roll pairs 8a, 8a that can be supported while feeding the metal material 3 is changed two-dimensionally or three-dimensionally, and a bending moment is applied to the heated portion of the metal material 3. By applying, the metal material 3 is bent. For this reason, according to the bending apparatus 1, the bending member 5 can be manufactured with high work efficiency.

この発明に係る曲げ加工装置１によれば、確かに、二次元又は三次元に屈曲する曲げ加工部と焼入れ部とを長手方向及び／又はこの長手方向と交叉する面内の周方向へ向けて断続的又は連続的に有する屈曲部材５を、高い作業能率で量産することが可能になる。   According to the bending device 1 according to the present invention, the bending portion and the quenching portion that are bent two-dimensionally or three-dimensionally are surely directed in the longitudinal direction and / or in the circumferential direction in the plane intersecting the longitudinal direction. It becomes possible to mass-produce the bending member 5 having intermittent or continuous operation with high work efficiency.

さらに、非特許文献２には、特許文献１により開示された発明のように二次元または三次元の複雑な形状に加工するものではないとともに焼入れによる高強度化を意図するものでもないが、中空の閉断面形状を有するとともに長手方向へ一体に構成される金属製の長尺の扁平な素材を長手方向へ送りながら部分的に急速な加熱及び冷却を行うことにより、曲げ半径が一定の二次元形状に曲げ加工を行って得られる屈曲部材の各部の寸法が報告されている。   Further, Non-Patent Document 2 does not process into a two-dimensional or three-dimensional complicated shape as in the invention disclosed in Patent Document 1, and does not intend to increase the strength by quenching. Two-dimensional with a constant bending radius by performing rapid heating and cooling partially while feeding a long flat metal material that has a closed cross-sectional shape and is integrally formed in the longitudinal direction. The dimensions of each part of the bending member obtained by bending the shape are reported.

図８は、非特許文献２により開示された曲げ加工の状況を示す説明図であり、図９は、この曲げ加工の前後における断面の寸法変化を示す説明図である。
図８及び図９に示すように、この曲げ加工は、図８に示すように、反対方向へ二回曲げ加工（曲げ半径Ｒ１、Ｒ２）を行うものである。幅Ｗ０、高さＨ０の矩形断面の異形管９ａに曲げ加工を行うと、曲げ加工後の製品である屈曲部材９ｂの幅は曲げ加工前の幅Ｗ０よりも微小量ΔＷ減少してＷ１（＝Ｗ０−ΔＷ）となる。また、曲げ加工の内周側であるＢ側の高さＨＢは、曲げ加工前の高さＨ０に比較して微小量ΔＨ増加する（ＨＢ＝Ｈ０＋ΔＨ）のに対し、曲げ加工の外周側であるＡ側の高さＨＡは曲げ加工前の高さＨ０に比較して微小量ΔＨ’減少する（ＨＡ＝Ｈ０−ΔＨ’）。 FIG. 8 is an explanatory view showing the state of bending disclosed in Non-Patent Document 2, and FIG. 9 is an explanatory view showing a dimensional change in cross section before and after the bending.
As shown in FIG. 8 and FIG. 9, this bending is performed twice (bending radii R1, R2) in the opposite direction as shown in FIG. When bending is performed on the deformed tube 9a having a rectangular cross section having a width W 0 and a height H 0 , the width of the bending member 9b, which is a product after bending, is reduced by a minute amount ΔW from the width W 0 before bending. W 1 (= W 0 −ΔW). Further, the bending is an inner circumferential side of the processing B side of the height H B, compared compared to the increased small amount ΔH (H B = H 0 + ΔH) of the bending before the height H 0, bending the height H a of the a-side is the outer circumferential side of the bending as compared to the height H 0 of the unprocessed micro amount [Delta] H 'decreases (H a = H 0 -ΔH' ).

このように、中空の閉断面形状を有するとともに長手方向へ一体に構成される金属製の長尺の扁平な素材９ａに曲げ加工を行って屈曲部材９ｂを製造すると、曲げ加工を行われた部分において、断面の幅と高さが曲げ加工前の寸法から若干ではあるものの変化し、寸法精度が低下することとなる。これらの寸法精度の低下の程度は、曲げ加工前の素材９ａの寸法（幅Ｗ０、高さＨ０、肉厚ｔ等）や、曲げ加工の条件（曲げ半径Ｒ、加熱幅ｂ等）に影響される。したがって、屈曲部材９ｂに高い寸法精度が要求される場合には、曲げ加工に伴う寸法変化をできるだけ抑制する必要がある。 In this way, when a bending member 9b is manufactured by bending a long metal flat material 9a that has a hollow closed cross-sectional shape and is integrally formed in the longitudinal direction, the bent portion is obtained. However, the width and height of the cross section are slightly changed from the dimensions before bending, and the dimensional accuracy is lowered. The degree of reduction in dimensional accuracy depends on the dimensions (width W 0 , height H 0 , wall thickness t, etc.) of the material 9a before bending, and bending conditions (bending radius R, heating width b, etc.). Affected. Therefore, when high dimensional accuracy is required for the bending member 9b, it is necessary to suppress the dimensional change accompanying bending as much as possible.

国際公開第２００６／０９３００６号パンフレットInternational Publication No. 2006/093006 Pamphlet

自動車技術 Ｖｏｌ．５７，Ｎｏ．６，２００３ ２３〜２８頁Automotive Technology Vol. 57, no. 6,2003 23-28 塑性と加工（日本塑性加工学会誌）第２８巻第３１３号（１９８７−２ ２１４〜２２１頁 異形管のダイレス曲げPlasticity and processing (Journal of the Japan Society for Technology of Plasticity) Vol. 28, No. 313 (1987-2 pages 214-221) Dieless bending of deformed tubes

特許文献１により開示された発明に係る曲げ加工装置１は、加工素材として円形等の定形の断面形状を有する金属材３を主な対象とする。このため、この発明に基づいて製造される屈曲部材５には、曲げ加工により成形可能な範囲があり、加工できない形状が存在することには変わりがなく、屈曲部材５のさらなる軽量化および小型化の実現には制約がある。   The bending apparatus 1 according to the invention disclosed in Patent Document 1 mainly uses a metal material 3 having a regular cross-sectional shape such as a circle as a processing material. For this reason, the bending member 5 manufactured based on the present invention has a range that can be formed by bending, and there is no change in the shape that cannot be processed, and the bending member 5 is further reduced in weight and size. There are restrictions on the realization of.

また、非特許文献２に開示されるように、中空の閉断面形状を有するとともに長手方向へ一体に構成される金属製の長尺の扁平な素材９ａに曲げ加工を行うと、屈曲部材９ｂにおける曲げ加工を行われた部分において、断面の幅と高さが曲げ加工前の寸法から若干ではあるものの変化し、寸法精度が低下する。このため、特許文献１により開示された発明により、中空の閉断面形状を有するとともに長手方向へ一体に構成される金属製の長尺の扁平な素材９ａに曲げ加工を行って、優れた寸法精度を有する屈曲部材９ｂを製造するためには、上述した寸法精度の低下を抑制する必要がある。   Further, as disclosed in Non-Patent Document 2, when bending is performed on a long, flat metal material 9a that has a hollow closed cross-sectional shape and is integrally formed in the longitudinal direction, the bending member 9b In the bent portion, the width and height of the cross section are slightly changed from the dimensions before bending, and the dimensional accuracy is lowered. For this reason, according to the invention disclosed in Patent Document 1, the metal long flat material 9a which has a hollow closed cross-sectional shape and is integrally formed in the longitudinal direction is bent to provide excellent dimensional accuracy. In order to manufacture the bending member 9b having the above, it is necessary to suppress the above-described decrease in dimensional accuracy.

本発明は、このような従来の技術が有する課題に鑑みてなされたものであり、屈曲部材を高い寸法精度で製造することができる屈曲部材の製造装置および屈曲部材の製造方法を提供することを目的とし、さらには、扁平な断面形状を有することから軽量かつ小型である屈曲部材を、高い寸法精度で製造することができる、屈曲部材の製造装置および屈曲部材の製造方法を提供することを目的とする。   The present invention has been made in view of the problems of such conventional techniques, and provides a bending member manufacturing apparatus and a bending member manufacturing method capable of manufacturing a bending member with high dimensional accuracy. It is another object of the present invention to provide a bending member manufacturing apparatus and a bending member manufacturing method capable of manufacturing a lightweight and small-sized bending member with a high dimensional accuracy since it has a flat cross-sectional shape. And

本発明者らは、特許文献１により開示された曲げ加工装置により扁平な素材に曲げ加工を行った場合に生じる寸法誤差は、例えば、素材に与えられる曲げモーメントや、加工時に素材に対して行われる加熱や冷却といった様々かつ複雑な要因に起因して発生し、これらの要因による寸法誤差を解消することは技術的に極めて困難であることを知見した。本発明者らはさらに検討した結果、素材における曲げ加工を行われた部分の三次元形状を計測または予測し、三次元形状の計測値または予測値と目標値との偏差に基づいて加工後の形状を予測し、素材における曲げ加工を行われていない部分の三次元形状を補正すれば、扁平な断面形状を有することから軽量かつ小型である屈曲部材を、高い寸法精度で製造することができるようになることを知見し、さらに検討を重ねて本発明を完成した。   The inventors of the present invention, for example, have a dimensional error that occurs when a flat material is bent by the bending apparatus disclosed in Patent Document 1, for example, a bending moment applied to the material or a material subjected to processing. It has been found that it is technically extremely difficult to eliminate dimensional errors caused by various factors such as heating and cooling. As a result of further study, the inventors measured or predicted the three-dimensional shape of the portion of the material that was bent, and based on the deviation between the measured value or predicted value of the three-dimensional shape and the target value, By predicting the shape and correcting the three-dimensional shape of the unbent portion of the material, it is possible to manufacture a lightweight and small bending member with high dimensional accuracy because it has a flat cross-sectional shape. As a result, the present invention was completed.

広義には、本発明は、（ｉ）閉断面形状を有するとともに長手方向へ一体に構成される金属製の長尺の素材を、その長手方向へ相対的に送りながら第１の位置において支持する支持手段と、（ｉｉ）この素材の送り方向について第１の位置よりも下流の第２の位置において送られる素材を部分的に加熱し、素材の送り方向について第２の位置よりも下流の第３の位置において第２の位置で加熱された部分を冷却するとともに、素材の送り方向について第３の位置よりも下流の領域で、素材を把持する把持手段の位置を、二次元または三次元で変更して、素材における加熱された部分に曲げモーメントを与えることによって素材に曲げ加工を行って屈曲部材を製造する加工手段と、（ｉｉｉ）素材の送り方向について加工手段よりも上流に配置され、屈曲部材の後に曲げ加工を行われる素材の、曲げ加工前の三次元形状を補正する補正加工を行う補正加工手段とを備えることを特徴とする補正機能を有する屈曲部材の製造装置である。   In a broad sense, the present invention supports (i) a long metal material having a closed cross-sectional shape and being integrally formed in the longitudinal direction at a first position while being relatively fed in the longitudinal direction. And (ii) partially heating the material fed at a second position downstream from the first position in the feed direction of the material, and a second downstream of the second position in the feed direction of the material. The portion heated at the second position at the position 3 is cooled, and the position of the gripping means for gripping the material in the region downstream of the third position in the feed direction of the material is two-dimensional or three-dimensional. A processing means for producing a bending member by bending the material by applying a bending moment to the heated portion of the material by changing, and (iii) arranged upstream of the processing means in the feed direction of the material A bending member manufacturing apparatus having a correction function, comprising: correction processing means for performing correction processing for correcting a three-dimensional shape of the material to be bent after the bending member, before the bending processing. .

本発明は、さらに具体的には、本発明は、（ｉ）閉断面形状を有するとともに長手方向へ一体に構成される金属製の長尺の素材を、その長手方向へ相対的に送りながら第１の位置において支持する支持手段と、（ｉｉ）この素材の送り方向について第１の位置よりも下流の第２の位置において送られる素材を部分的に加熱し、素材の送り方向について第２の位置よりも下流の第３の位置において第２の位置で加熱された部分を冷却するとともに、素材の送り方向について第３の位置よりも下流の領域で、素材を把持する把持手段の位置を、二次元または三次元で変更して、素材における加熱された部分に曲げモーメントを与えることによって素材に曲げ加工を行って屈曲部材を製造する加工手段と、（ｉｉｉ）素材の送り方向について加工手段よりも上流に配置され、曲げ加工を行われた屈曲部材における曲げ加工部の三次元形状の計測結果に基づいて、屈曲部材の後に曲げ加工を行われる素材の、曲げ加工前の三次元形状を補正する補正加工を行う補正加工手段とを備えることを特徴とする補正機能を有する屈曲部材の製造装置である。   More specifically, the present invention relates to (i) a metal long material having a closed cross-sectional shape and integrally formed in the longitudinal direction while relatively feeding in the longitudinal direction. (Ii) partially heating the material to be fed at a second position downstream of the first position in the feed direction of the material, and second for the feed direction of the material. The portion heated in the second position at the third position downstream from the position is cooled, and the position of the gripping means for gripping the material in the region downstream from the third position in the feed direction of the material, (Iii) processing means for manufacturing a bending member by bending the material by applying a bending moment to the heated portion of the material by changing in two dimensions or three dimensions; Based on the measurement result of the three-dimensional shape of the bending part in the bending member that is arranged upstream of the bending member, the three-dimensional shape before bending of the material to be bent after the bending member A bending member manufacturing apparatus having a correction function, comprising correction processing means for performing correction processing for correction.

具体的には、本発明は、（ｉ）閉断面形状を有するとともに長手方向へ一体に構成される金属製の長尺の素材を、その長手方向へ相対的に送りながら第１の位置において支持する支持手段と、（ｉｉ）素材の送り方向について第１の位置よりも下流の第２の位置において送られる素材を部分的に加熱し、素材の送り方向について第２の位置よりも下流の第３の位置において第２の位置で加熱された部分を冷却するとともに、素材の送り方向について第３の位置よりも下流の領域で、素材を把持する把持手段の位置を、二次元または三次元で変更して、素材における加熱された部分に曲げモーメントを与えることによって素材に曲げ加工を行って屈曲部材を製造する加工手段と、（ｉｉｉ）曲げ加工を行われた屈曲部材における曲げ加工部の三次元形状を計測する計測手段と、（ｉｖ）素材の送り方向について加工手段よりも上流に配置され、計測手段による計測結果に基づいて屈曲部材の後に曲げ加工を行われる素材の、曲げ加工前の三次元形状を補正する補正加工を行う補正加工手段とを備えることを特徴とする補正機能を有する屈曲部材の製造装置である。   Specifically, the present invention supports (i) a long metal material that has a closed cross-sectional shape and is integrally formed in the longitudinal direction, and supports the first material while relatively feeding it in the longitudinal direction. And (ii) partially heating the material to be fed at a second position downstream from the first position in the material feeding direction, and a second downstream of the second position in the material feeding direction. The portion heated at the second position at the position 3 is cooled, and the position of the gripping means for gripping the material in the region downstream of the third position in the feed direction of the material is two-dimensional or three-dimensional. And (iii) a bending portion of the bending member subjected to the bending process, and (iii) a bending means for bending the raw material by bending the material by applying a bending moment to the heated portion of the material. A measuring means for measuring the original shape; and (iv) a material that is arranged upstream of the processing means in the feed direction of the material and that is bent after the bending member based on the measurement result by the measuring means, before the bending process. A bending member manufacturing apparatus having a correction function, comprising correction processing means for performing correction processing for correcting a three-dimensional shape.

別の観点からは、本発明は、閉断面形状を有するとともに長手方向へ一体に構成される金属製の長尺の素材を、その長手方向へ相対的に送りながら第１の位置において支持し、この素材の送り方向について第１の位置よりも下流の第２の位置において送られる素材を部分的に加熱し、素材の送り方向について第２の位置よりも下流の第３の位置において第２の位置で加熱された部分を冷却するとともに、素材の送り方向について第３の位置よりも下流の領域で、素材を把持する把持手段の位置を、二次元または三次元で変更して、素材における加熱された部分に曲げモーメントを与えることによって素材に曲げ加工を行う屈曲部材の製造方法であって、曲げ加工を行われた屈曲部材における曲げ加工部の三次元形状を計測し、この三次元形状の計測結果に基づいて、屈曲部材の後に曲げ加工を行われる素材の、曲げ加工前の三次元形状を補正する補正加工を行うことを特徴とする屈曲部材の製造方法である。   From another viewpoint, the present invention supports a metal long material having a closed cross-sectional shape and integrally formed in the longitudinal direction at a first position while relatively feeding in the longitudinal direction, The material to be fed at a second position downstream of the first position with respect to the feed direction of the material is partially heated, and the second at a third position downstream of the second position with respect to the feed direction of the material. The portion heated by the position is cooled, and the position of the gripping means for gripping the material is changed two-dimensionally or three-dimensionally in the region downstream of the third position in the material feed direction, and the material is heated. A bending member manufacturing method for bending a material by applying a bending moment to the bent portion, and measuring the three-dimensional shape of the bending portion of the bending member subjected to the bending process. Based on the measurement results, the material to be performed bending after bending member, a manufacturing method of the bending member characterized by performing correction processing for correcting the bending previous three-dimensional shape.

これらの本発明では、補正加工が、第２の位置よりも上流に配置された一対のロールにより、行われることが望ましい。
これらの本発明では、補正加工が、素材に与えられる曲げモーメント、第２の位置で行われる素材の加熱、または、第３の位置で行われる素材の冷却のうちの少なくとも一つに起因して発生する寸法誤差を相殺するように、行われることが望ましい。本発明によれば、円形閉断面形状の素材のみならず、扁平閉断面形状の素材に対しても優れた寸法精度で曲げ加工を行って屈曲部材を製造することができる。特に、扁平閉断面形状の素材は、素材に与えられる曲げモーメント、第２の位置で行われる素材の加熱、または、第３の位置で行われる素材の冷却の少なくとも一つに起因して発生する寸法変化を予測することが極めて困難であるため、本発明は産業上特に有用である。 In these aspects of the present invention, it is desirable that the correction process be performed by a pair of rolls arranged upstream of the second position.
In the present invention, the correction processing is caused by at least one of a bending moment applied to the material, heating of the material performed at the second position, or cooling of the material performed at the third position. It is desirable to do so to cancel out the dimensional errors that occur. According to the present invention, it is possible to manufacture a bending member by performing bending with excellent dimensional accuracy not only on a material having a circular closed cross-sectional shape but also on a material having a flat closed cross-sectional shape. In particular, a material having a flat closed cross-sectional shape is generated due to at least one of a bending moment applied to the material, heating of the material performed at the second position, or cooling of the material performed at the third position. Since it is extremely difficult to predict dimensional changes, the present invention is particularly useful in industry.

また、本発明は、閉断面形状を有するとともに長手方向へ一体に構成される金属製の長尺の素材を、その長手方向へ相対的に送りながら第１の位置において支持する支持手段と、この素材の送り方向について第１の位置よりも下流の第２の位置において送られる素材を部分的に加熱し、素材の送り方向について第２の位置よりも下流の第３の位置において第２の位置で加熱された部分を冷却するとともに、素材の送り方向について第３の位置よりも下流の領域で、素材を把持する把持手段の位置を、二次元または三次元で変更して、素材における加熱された部分に曲げモーメントを与えることによって素材に曲げ加工を行って屈曲部材を製造する加工手段と、素材の送り方向について加工手段よりも上流に配置され、曲げ加工を行われた屈曲部材における曲げ加工部の三次元形状の予測結果に基づいて、屈曲部材の後に曲げ加工を行われる素材の、曲げ加工前の三次元形状を補正する補正加工を行う補正加工手段とを備えることを特徴とする補正機能を有する屈曲部材の製造装置である。   The present invention also provides a supporting means for supporting a metal long material having a closed cross-sectional shape and being integrally formed in the longitudinal direction at a first position while relatively feeding the material in the longitudinal direction. The material to be fed at the second position downstream of the first position in the material feeding direction is partially heated, and the second position at the third position downstream of the second position in the material feeding direction. In addition to cooling the heated part, the position of the gripping means for gripping the material is changed two-dimensionally or three-dimensionally in the region downstream of the third position in the feed direction of the material. A bending means that is bent and placed upstream of the processing means in the material feed direction by bending the material by bending it to produce a bending member Correction processing means for performing correction processing for correcting the three-dimensional shape before bending of the material to be bent after the bending member based on the prediction result of the three-dimensional shape of the bending portion in the material. It is a manufacturing apparatus of the bending member which has the correction function characterized.

これらの本発明では、閉断面形状を有するとともに長手方向へ一体に構成される金属製の長尺の扁平な素材に曲げ加工を行う場合に、与えられる曲げモーメント、第２の位置で行われる素材の加熱、または、第３の位置で行われる素材の冷却の少なくとも一つに起因して発生する、素材における曲げ加工を行われた部分の三次元の寸法変化を計測手段により測定または算出し、それを補正するために補正加工手段によって、この後に曲げ加工を行われる素材の、曲げ加工前の三次元形状を補正する補正加工を行う。なお、素材における曲げ加工を行われた部分の三次元の寸法変化を算出する手法としては、例えば、目的の寸法、形状と実測した寸法、形状との偏差を、素材の材質や厚みによって統計処理して得られる関数に基づいて、算出することが挙げられる。   In these present inventions, when bending is performed on a long metal flat material that has a closed cross-sectional shape and is integrally formed in the longitudinal direction, the bending moment that is applied, the material that is performed at the second position Measuring or calculating the three-dimensional dimensional change of the bent portion of the material caused by at least one of heating of the material or cooling of the material performed at the third position by the measuring means, In order to correct this, the correction processing means performs correction processing for correcting the three-dimensional shape of the material to be bent after that before the bending processing. In addition, as a method for calculating the three-dimensional dimensional change of the bent portion of the material, for example, statistical processing is performed on the deviation between the target size and shape and the actually measured size and shape depending on the material and thickness of the material. And calculating based on the obtained function.

例えば、屈曲部材から測定して求めた、幅Ｗ０、高さＨ０の矩形断面の素材における曲げ加工を行われた部分に発生した差異量ΔＷ、ΔＨを加味して、曲げ加工後の幅、高さが目標寸法Ｗ０’、高さＨ０’となるように、曲げ加工前の素材の幅を（Ｗ０＋ΔＷ）とし、曲げ外周側であるＡ側の高さを（Ｈ０＋ΔＨ）とし、曲げ外周側であるＢ側の高さを（Ｈ０−ΔＨ’）として、曲げ加工を行う。なお、三次元形状の補正は、３つの座標系の内一つの座標系のみが変化する場合は一次元、二つの座標系が変化する場合には二次元、全ての座標系において変数が変化する場合には三次元での補正になる。 For example, the width after bending by taking into account the difference amounts ΔW and ΔH generated in the bent portion of the rectangular cross-section material having the width W 0 and the height H 0 obtained by measurement from the bending member The width of the material before bending is (W 0 + ΔW) so that the height becomes the target dimension W 0 ′ and the height H 0 ′, and the height on the A side that is the outer periphery of the bending is (H 0 + ΔH). ) And the height on the B side that is the outer periphery of bending is (H 0 −ΔH ′), and bending is performed. The three-dimensional shape correction is variable when only one of the three coordinate systems changes, one dimension when two coordinate systems change, and two or two variables when two coordinate systems change. In some cases, the correction is in three dimensions.

特に、素材の断面が丸断面ではなくて矩形断面や偏平断面である場合には、曲げモーメントを与えられることによる寸法変化のみならず、図５（ａ）および図５（ｂ）を参照しながら後述するように、第２の位置で行われる素材の加熱や、第３の位置で行われる素材の冷却の不均一に起因すると考えられる寸法変化も発生することがあるので、本発明は特に有効である。   In particular, when the cross section of the material is not a round cross section but a rectangular cross section or a flat cross section, not only a dimensional change due to a bending moment but also referring to FIGS. 5 (a) and 5 (b) As will be described later, the present invention is particularly effective because dimensional changes that may be caused by non-uniform heating of the material performed at the second position and cooling of the material performed at the third position may occur. It is.

これらの本発明により製造される屈曲部材は、長手方向へ向けて少なくとも第１の部分および第２の部分を備え、第１の部分に含まれる一対の長辺と、第２の部分に含まれる一対の長辺とが互いに異なる平面内に存在するように、第１の部分と第２の部分との間にねじれ部および／または曲げ部を有することが例示される。   These bending members manufactured according to the present invention include at least a first portion and a second portion in the longitudinal direction, and are included in the pair of long sides included in the first portion and the second portion. It is exemplified that a twisted portion and / or a bent portion is provided between the first portion and the second portion so that the pair of long sides exist in different planes.

本発明によれば、曲げ加工を行われた屈曲部材における曲げ加工部の三次元形状を計測し、この三次元形状の計測結果に基づいて、屈曲部材の後に曲げ加工を行われる素材の、曲げ加工前の三次元形状を補正する補正加工を行うので、優れた寸法精度を有する屈曲部材を製造することが可能になる。   According to the present invention, the three-dimensional shape of the bent portion in the bent member that has been bent is measured, and the bending of the material that is bent after the bent member is based on the measurement result of the three-dimensional shape. Since correction processing for correcting the three-dimensional shape before processing is performed, it is possible to manufacture a bending member having excellent dimensional accuracy.

図１は、本発明に係る製造装置の構成例を模式的に示す説明図である。FIG. 1 is an explanatory view schematically showing a configuration example of a manufacturing apparatus according to the present invention. 図２は、中間部材及び屈曲部材の横断面形状の一例を示す説明図である。FIG. 2 is an explanatory diagram illustrating an example of cross-sectional shapes of the intermediate member and the bending member. 図３は、水平ロールにより加工されて中間部材が製造される状況を示す説明図である。FIG. 3 is an explanatory view showing a situation in which an intermediate member is manufactured by being processed by a horizontal roll. 図４（ａ）および図４（ｂ）は、いずれも、高周波加熱装置による加熱や冷却装置による冷却の不均一に起因して屈曲部材に発生する寸法変化の一例を模式的に示す説明図である。4 (a) and 4 (b) are explanatory diagrams schematically showing an example of a dimensional change that occurs in the bending member due to non-uniformity of heating by the high-frequency heating device or cooling by the cooling device. is there. 図５（ａ）、図５（ｂ）は、それぞれ、図４（ａ）、図４（ｂ）に示す寸法変化が発生した屈曲部材に対する従来の補正手段の一例を模式的に示す説明図である。5 (a) and 5 (b) are explanatory views schematically showing an example of conventional correction means for the bending member in which the dimensional change shown in FIGS. 4 (a) and 4 (b) has occurred. is there. 図６は、本発明により製造される屈曲部材の構成例を、簡略化および概念化して示す説明図である。FIG. 6 is an explanatory view showing a configuration example of a bending member manufactured according to the present invention in a simplified and conceptualized manner. 図７は、特許文献１により曲げ加工装置の概略を示す説明図である。FIG. 7 is an explanatory diagram showing an outline of a bending apparatus according to Patent Document 1. As shown in FIG. 図８は、非特許文献２により開示された曲げ加工の状況を示す説明図である。FIG. 8 is an explanatory view showing the state of bending disclosed in Non-Patent Document 2. 図９は、非特許文献２により開示された曲げ加工の前後における断面の寸法変化を示す説明図である。FIG. 9 is an explanatory view showing a dimensional change of the cross section before and after the bending process disclosed by Non-Patent Document 2.

以下、本発明を実施するための形態を、添付図面を参照しながら詳細に説明する。なお、以降の説明では、本発明により製造される屈曲部材が、鋼製であって、自動車や各種機械に用いられる強度部材、補強部材または構造部材である場合を例にとる。   DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. In the following description, the case where the bending member manufactured according to the present invention is made of steel and is a strength member, a reinforcing member, or a structural member used in an automobile or various machines is taken as an example.

図１は、本発明に係る補正機能を有する屈曲部材２１の製造装置（以下、単に「製造装置」という）１０の構成例を模式的に示す説明図である。
図１に示すように、この製造装置１０は、支持手段１１と、補正加工手段１４と、加工手段１２と、計測手段１３とを備えるので、これらの構成要素を順次説明する。 FIG. 1 is an explanatory diagram schematically showing a configuration example of a manufacturing apparatus (hereinafter simply referred to as “manufacturing apparatus”) 10 for a bending member 21 having a correction function according to the present invention.
As shown in FIG. 1, the manufacturing apparatus 10 includes a support unit 11, a correction processing unit 14, a processing unit 12, and a measurement unit 13, so these components will be described sequentially.

（ｉ）支持手段１１
図１に示すように、はじめに、中空の円形の閉断面形状１５ａを有するとともに長手方向へ一体に構成される鋼製の長尺の素材である鋼管１５を、送り装置１６によりその長手方向へ送る。 (I) Support means 11
As shown in FIG. 1, first, a steel pipe 15 which is a long steel material having a hollow circular closed cross-sectional shape 15 a and integrally formed in the longitudinal direction is fed by the feeding device 16 in the longitudinal direction. .

送り装置１６は、鋼管１５をその長手方向へ送るためのものである。このような送り装置１６としては、電動サーボシリンダーを用いたタイプが例示されるが、特定の型式のものに限定する必要はなく、ボールネジを用いたタイプやタイミングベルトやチェーンを用いたタイプなど、この種の送り装置として公知のものであれば等しく用いることができる。   The feeding device 16 is for feeding the steel pipe 15 in its longitudinal direction. Such a feeding device 16 is exemplified by a type using an electric servo cylinder, but is not limited to a specific type, such as a type using a ball screw, a type using a timing belt or a chain, etc. Any known device of this type can be used equally.

なお、図１に示す製造装置１０では、円形の横断面形状１５ａを有する鋼管１５を加工素材として用いた場合を例にとるが、本発明における加工素材は、鋼管１５に限定されるものではなく、例えば矩形、楕円形、長円形、正方形さらには各種異形の横断面形状を有する中空の金属材に対しても、鋼管１５と同様に適用可能である。   In addition, in the manufacturing apparatus 10 shown in FIG. 1, although the case where the steel pipe 15 which has circular cross-sectional shape 15a is used as a processing material is taken as an example, the processing material in this invention is not limited to the steel pipe 15. For example, the present invention can also be applied to a hollow metal material having a rectangular, elliptical, oval, square, or various irregular cross-sectional shapes in the same manner as the steel pipe 15.

この鋼管１５は、つかみ部１７で保持されながら、送り装置１６によって、所定の送り速度でその軸方向（長手方向）へ送られる。図１に示す製造装置１０では、つかみ部１７の下流に補正加工手段１４が配置されるが、製造装置１０の理解を容易にするため、補正加工手段１４の説明は、支持手段１１の説明を行った後に行う。   The steel pipe 15 is fed in the axial direction (longitudinal direction) by the feeding device 16 at a predetermined feeding speed while being held by the grip portion 17. In the manufacturing apparatus 10 shown in FIG. 1, the correction processing means 14 is arranged downstream of the gripping portion 17. However, in order to facilitate understanding of the manufacturing apparatus 10, the description of the correction processing means 14 will be the description of the support means 11. After doing it.

支持手段１１は、後述する補正加工手段１４により加工された中間部材２０を、第１の位置Ａにおいて支持する。すなわち、支持手段１１は、送り装置１６によりその軸方向へ送られる中間部材２０を、第１の位置Ａにおいて移動自在に支持するためのものである。この製造装置１０では、支持手段１１として、対向して配置される一対の孔型の従動ロール１１ａ、１１ｂを２組並設して用いるが、特定の型式のものに限定する必要はなく、この種の支持装置として公知のものであれば等しく用いることができる。このようにして中間部材２０は、支持手段１１の設置位置Ａを通過して、その軸方向へ送られる。   The support unit 11 supports the intermediate member 20 processed by the correction processing unit 14 described later at the first position A. That is, the support means 11 is for supporting the intermediate member 20 fed in the axial direction by the feeding device 16 at the first position A so as to be movable. In this manufacturing apparatus 10, two pairs of hole-type driven rolls 11 a and 11 b arranged opposite to each other are used as the support means 11, but it is not necessary to be limited to a specific type. Any known supporting device can be used. In this way, the intermediate member 20 passes through the installation position A of the support means 11 and is sent in the axial direction thereof.

なお、支持手段１１に、後述する水平ロール１８ａ、１８ｂによる扁平閉断面形状２０ａへの加工機能（補正加工手段）を兼備させてもよい。これによれば、水平ロール１８ａ、１８ｂを、つかみ部１７と支持手段１１との間に配置する必要がなくなるので、製造装置１０全体を小型化することができる。   In addition, you may make the support means 11 have the function (correction process means) to the flat closed cross-sectional shape 20a by the horizontal rolls 18a and 18b mentioned later. According to this, since it becomes unnecessary to arrange the horizontal rolls 18a and 18b between the grip part 17 and the support means 11, the whole manufacturing apparatus 10 can be reduced in size.

また、図１に示すように、水平ロール１８ａ、１８ｂを、つかみ部１７と支持手段１１との間に配置して扁平閉断面形状２０ａへの加工を行う場合には、支持手段１１が支持する中間部材２０は中空の扁平閉断面形状２０ａを有することから、支持手段１１の開度を、この扁平閉断面形状２０ａに適合させて、例えば油圧やエアーを用いて調整可能に構成することが望ましい。   Further, as shown in FIG. 1, when the horizontal rolls 18a and 18b are disposed between the gripping part 17 and the support means 11 and processed into the flat closed cross-sectional shape 20a, the support means 11 supports. Since the intermediate member 20 has a hollow flat closed cross-sectional shape 20a, it is desirable that the opening degree of the support means 11 is adapted to the flat closed cross-sectional shape 20a so as to be adjustable using, for example, hydraulic pressure or air. .

このように、支持手段１１は、扁平閉断面形状２０ａを有するとともに長手方向へ一体に構成される金属製の長尺の素材である中間部材２０を、その長手方向へ相対的に送りながら第１の位置Ａにおいて支持するものである。   In this way, the support means 11 has the flat closed cross-sectional shape 20a and the first intermediate member 20 which is a metal long material integrally formed in the longitudinal direction while relatively feeding in the longitudinal direction. Is supported at position A.

（ｉｉ）補正加工手段１４
補正加工手段１４は、鋼管１５の送り方向について後述する加工手段１２よりも上流側に配置される。この製造装置１０における補正加工手段１４は、対向配置される上下一対の水平ロール１８ａ、１８ｂによって、構成される。このような水平ロール１８ａ、１８ｂは、特定の型式のものに限定する必要はなく、この種の加工に供される周知慣用のロールを用いればよい。例えば、多角形あるいは異形の鋼管を用いた場合には、３方ロール、４方ロールなどとして、補正を行えばよい。 (Ii) Correction processing means 14
The correction processing means 14 is arranged on the upstream side of the processing means 12 described later in the feed direction of the steel pipe 15. The correction processing means 14 in the manufacturing apparatus 10 is constituted by a pair of upper and lower horizontal rolls 18a and 18b arranged to face each other. Such horizontal rolls 18a and 18b do not need to be limited to a specific type, and a well-known and conventional roll used for this type of processing may be used. For example, when a polygonal or irregularly shaped steel pipe is used, correction may be performed as a three-way roll, a four-way roll, or the like.

この補正加工手段１４は二つの機能を有する。第１の機能は、送り装置１６により送られる鋼管１５を、対向して配置される一対の長辺１９、１９を有する中空の扁平閉断面形状２０ａを有する鋼製の長尺の中間材２０に加工する機能であり、第２の機能は、送り装置１６により送られる鋼管１５を支持する機能である。図１に示す例は、素材が円形の横断面形状１５ａを有する鋼管１５であるので、補正加工手段１４が第１の機能を有するように構成したが、これとは異なり、送り装置１６により送られる素材がはじめから扁平閉断面形状２０ａを有するものである場合には、補正加工手段１４がこの第１の機能を有する必要はなく、第２の機能のみを有すればよい。   This correction processing means 14 has two functions. The first function is to convert the steel pipe 15 fed by the feeding device 16 into a long steel intermediate member 20 having a hollow flat closed cross-sectional shape 20a having a pair of long sides 19 and 19 arranged to face each other. The second function is a function of supporting the steel pipe 15 fed by the feeding device 16. In the example shown in FIG. 1, since the material is a steel pipe 15 having a circular cross-sectional shape 15a, the correction processing means 14 is configured to have the first function. When the material to be obtained has the flat closed cross-sectional shape 20a from the beginning, the correction processing means 14 does not need to have the first function, and only has the second function.

本発明に係る製造装置１０における補正加工手段１４は、後述する計測手段１３による、曲げ加工を行われた屈曲部材２１における曲げ加工部の三次元形状の計測結果に基づいて、この屈曲部材２１の後に曲げ加工を行われる中間部材２０の、曲げ加工前の三次元形状を補正する補正加工を行う。この製造装置１０の最大の特徴は、補正加工手段１４が、この補正加工を行う点であるので、以下詳細に説明する。   The correction processing means 14 in the manufacturing apparatus 10 according to the present invention is based on the measurement result of the three-dimensional shape of the bending portion of the bending member 21 that has been bent by the measuring means 13 described later. Correction processing for correcting the three-dimensional shape before bending of the intermediate member 20 to be bent later is performed. The greatest feature of the manufacturing apparatus 10 is that the correction processing means 14 performs this correction processing, and will be described in detail below.

図２は、中間部材２０及び屈曲部材２１の横断面形状の一例を示す説明図である。また、図３は、水平ロール１８ａ、１８ｂにより加工されて中間部材２０が製造される状況を示す説明図である。   FIG. 2 is an explanatory diagram showing an example of the cross-sectional shapes of the intermediate member 20 and the bending member 21. Moreover, FIG. 3 is explanatory drawing which shows the condition where the intermediate member 20 is manufactured by processing with the horizontal rolls 18a and 18b.

本発明では、後述する計測手段１３によって屈曲部材２１の屈曲部において不可避的に発生する寸法変化を補正するため、水平ロール１８ａ、１８ｂによってこの屈曲部材２１の後に曲げ加工を行われる中間部材２０を、図２に示す非対称の断面形状に補正加工しておく。例えば、図９を参照しながら説明したように幅Ｗ０、高さＨ０の矩形断面の曲げ加工で発生する目標値との差異量ΔＷ、ΔＨ、ΔＨ’を加味して、曲げ加工後の幅、高さが目標寸法Ｗ０’、高さＨ０’となるように、曲げ加工前の素材２０の幅を（Ｗ０＋ΔＷ）とし、曲げ外周側であるＡ側の高さを（Ｈ０＋ΔＨ）とし、曲げ外周側であるＢ側の高さを（Ｈ０−ΔＨ’）となるように、水平ロール１８ａ、１８ｂによって鋼管１５に部分的に成形を行って、中間部材２０とする。 In the present invention, in order to correct the dimensional change inevitably generated in the bent portion of the bending member 21 by the measuring means 13 described later, the intermediate member 20 that is bent after the bending member 21 by the horizontal rolls 18a and 18b is provided. Then, correction processing is performed to an asymmetric cross-sectional shape shown in FIG. For example, as described with reference to FIG. 9, taking into account the difference amounts ΔW, ΔH, ΔH ′ from the target values generated in the bending of the rectangular cross section having the width W 0 and the height H 0 , The width of the material 20 before bending is set to (W 0 + ΔW) so that the width and height are the target dimension W 0 ′ and the height H 0 ′, and the height on the A side that is the outer periphery side of the bending is (H 0 + ΔH), and the steel pipe 15 is partially formed by the horizontal rolls 18a, 18b so that the height of the B side which is the outer periphery of the bending becomes (H 0 −ΔH ′), and the intermediate member 20 is obtained. .

なお、差異量ΔＷ、ΔＨ、ΔＨ’は、例えば、中空の閉断面形状を有するとともに長手方向へ一体に構成される金属製の長尺の扁平な素材に実際に曲げ加工を行い、曲げ加工に起因した寸法変化量を実測することにより算出すればよく、または熱処理解析（シミュレーション）を行って素材の温度分布を求め、さらにその温度分布データを用いたひずみ解析（シミュレーション）を行って算出するようにしてもよい。   The difference amounts ΔW, ΔH, and ΔH ′ are, for example, obtained by actually bending a long metal flat material that has a hollow closed cross-sectional shape and is integrally formed in the longitudinal direction. It may be calculated by actually measuring the resulting dimensional change, or by performing a heat treatment analysis (simulation) to obtain the temperature distribution of the material, and further performing a strain analysis (simulation) using the temperature distribution data. It may be.

以上の説明では、幅Ｗ０、高さＨ０の矩形断面の屈曲部材２１を例にとったが、本発明は、この例に限定されるものではなく、あらゆる異形断面に適用できる。異形断面の屈曲部材の製造方法では、屈曲変形部で不可避的に発生する差異量を補正することができるように、補正加工手段１４によって、適切な方向から部分的に成形を加えればよい。この場合には、図１に示すように一対の水平ロール１８ａ、１８ｂに限定されるものではなく、３つあるいは４つあるいはそれ以上のロールの組み合わせでもよいし、ロールによる多段成形やプレス成形を行うことにより、所望の断面の中間部材２０としてもよい。 In the above description, the bending member 21 having a rectangular cross section with a width W 0 and a height H 0 is taken as an example, but the present invention is not limited to this example, and can be applied to any irregular cross section. In the manufacturing method of the bending member having the irregular cross section, the correction processing unit 14 may perform partial molding from an appropriate direction so that the difference amount inevitably generated in the bending deformation portion can be corrected. In this case, as shown in FIG. 1, it is not limited to a pair of horizontal rolls 18a, 18b, but may be a combination of three, four or more rolls, or multistage molding or press molding with rolls. By carrying out, it is good also as the intermediate member 20 of a desired cross section.

また、以上の説明では、鋼管１５の長手方向の全部に、水平ロール１８ａ、１８ｂによる加工を行う場合を例にとったが、本発明はこの場合に限定されるものではなく、長手方向の必要な一部に、水平ロール１８ａ、１８ｂによる加工を行うこととしてもよい。   Moreover, in the above description, the case where the processing by the horizontal rolls 18a and 18b is performed on the entire longitudinal direction of the steel pipe 15 is taken as an example, but the present invention is not limited to this case, and the longitudinal direction is necessary. It is good also as processing with horizontal roll 18a, 18b in a part.

また、以上の説明では、ライン内に配置される水平ロール１８ａ、１８ｂによって鋼管１５をオンラインでフィードバック制御により扁平に加工することによって、中空の扁平閉断面形状２０ａを有する中間部材２０を製造する場合を例にとったが、本発明はこの場合に限定されるものではなく、先の鋼管１５の加工実績に基づいて後の鋼管１５を扁平に加工することによって中間部材２０を製造することもでき、さらに本発明に係る製造装置１０にセットする前に、オフラインで中空の扁平閉断面形状２０ａを有するように鋼管１５に対する加工を事前に行っておき、その後に図１に示す送り装置１６にセットして送るようにしてもよい。   In the above description, the intermediate member 20 having the hollow flat closed cross-sectional shape 20a is manufactured by processing the steel pipe 15 flat by online feedback control using the horizontal rolls 18a and 18b arranged in the line. However, the present invention is not limited to this case, and the intermediate member 20 can also be manufactured by processing the subsequent steel pipe 15 into a flat shape based on the processing results of the previous steel pipe 15. Further, before setting in the manufacturing apparatus 10 according to the present invention, the steel pipe 15 is previously processed offline so as to have a hollow flat closed cross-sectional shape 20a, and then set in the feeding apparatus 16 shown in FIG. You may make it send.

また、以上の説明では、水平ロール１８ａ、１８ｂによる圧下により中空の扁平閉断面形状２０ａを有する中間部材２０を製造する場合を例にとったが、本発明はこの場合に限定されるものではなく、例えばプレス等の、中空の扁平閉断面形状２０ａに加工できる手段であれば、如何なる手段でも適用可能である。   Moreover, in the above description, the case where the intermediate member 20 having the hollow flat closed cross-sectional shape 20a is manufactured by the reduction by the horizontal rolls 18a and 18b is taken as an example, but the present invention is not limited to this case. Any means can be applied as long as it can be processed into a hollow flat closed cross-sectional shape 20a, such as a press.

また、以上の説明では、水平ロール１８ａ、１８ｂを、つかみ部１７と後述する支持手段１１との間に配置した場合を例にとったが、本発明はこの場合に限定されるものではなく、支持手段１１と後述する高周波加熱装置２２との間に配置してもよい。ただし、水平ロール１８ａ、１８ｂを支持手段２と高周波加熱装置２２との間に配置する場合には、水平ロール１８ａ、１８ｂの設置スペースが制限される点に十分留意する必要がある。   In the above description, the horizontal rolls 18a and 18b are taken as an example of the case where the horizontal rolls 18a and 18b are arranged between the gripping part 17 and the supporting means 11 described later, but the present invention is not limited to this case. You may arrange | position between the support means 11 and the high frequency heating apparatus 22 mentioned later. However, when the horizontal rolls 18a and 18b are disposed between the support means 2 and the high-frequency heating device 22, it is necessary to pay sufficient attention to the fact that the installation space for the horizontal rolls 18a and 18b is limited.

なお、補正加工手段１４による鋼管１５に対する補正加工は、製造するロットの最初においては鋼管１５をダミーとして中間部材２０に適宜加工し、その後には、ダミーとして最初に加工された鋼管１５のデータに基づいて、それ以降の鋼管１５を中間部材２０に補正加工すればよい。   The correction processing for the steel pipe 15 by the correction processing means 14 is performed by appropriately processing the steel pipe 15 into the intermediate member 20 as a dummy at the beginning of the lot to be manufactured, and thereafter, the data of the steel pipe 15 processed as a dummy first. Based on this, the subsequent steel pipe 15 may be corrected to the intermediate member 20.

このように、本発明に係る製造装置１０は、補正加工手段１４を備えることにより、屈曲部材２１の補正機能を有するものである。   As described above, the manufacturing apparatus 10 according to the present invention has the correction function of the bending member 21 by including the correction processing means 14.

（ｉｉｉ）加工手段１２
加工手段１２は、中間部材２０に曲げ加工を行って屈曲部材２１を製造する。すなわち、この中間部材２０の送り方向について第１の位置Ａよりも下流の第２の位置Ｂにおいて送られる中間部材２０を、高周波加熱装置２２により部分的に加熱する。 (Iii) Processing means 12
The processing means 12 manufactures the bending member 21 by bending the intermediate member 20. That is, the intermediate member 20 that is fed at the second position B downstream of the first position A in the feeding direction of the intermediate member 20 is partially heated by the high-frequency heating device 22.

高周波加熱装置２２は、送られる中間部材２０の送り方向について第１の位置Ａよりも下流に位置する第２の位置Ｂにおいて、送られる中間部材２０を部分的に加熱するためのものである。この高周波加熱装置２２としては、中間部材２０を高周波誘導加熱することができるコイルを有するものを用いればよく、この種の高周波加熱装置として公知のものであれば等しく用いることができる。   The high-frequency heating device 22 is for partially heating the intermediate member 20 to be sent at a second position B located downstream of the first position A in the feed direction of the intermediate member 20 to be sent. As the high-frequency heating device 22, a device having a coil capable of performing high-frequency induction heating of the intermediate member 20 may be used. Any known high-frequency heating device of this kind can be used equally.

中間部材２０の軸方向と直交する方向と平行な方向に関する、中間部材２０に対する高周波加熱装置２２の加熱コイルの距離を変更することによって、送り出される中間部材２０の一部をその周方向へ不均一に加熱することもできる。   By changing the distance of the heating coil of the high-frequency heating device 22 with respect to the intermediate member 20 in a direction parallel to the direction orthogonal to the axial direction of the intermediate member 20, a part of the intermediate member 20 sent out is uneven in the circumferential direction. It can also be heated.

高周波加熱装置２２の上流側に少なくとも１つ以上設けられる中間部材２０の予熱手段を併用することによって、中間部材２０を複数回加熱することもできる。
さらに、高周波加熱装置２２の上流側に少なくとも１つ以上設けられる中間部材２０の予熱手段を併用することによって、送り出される中間部材２０の一部をその周方向へ不均一に加熱することもできる。このようにして、中間部材２０は、高周波加熱装置２２により、部分的に急速に加熱される。 The intermediate member 20 can be heated a plurality of times by using in combination with at least one preheating means for the intermediate member 20 provided on the upstream side of the high-frequency heating device 22.
Furthermore, by using together with at least one preheating means for the intermediate member 20 provided on the upstream side of the high-frequency heating device 22, a part of the intermediate member 20 to be sent out can be heated non-uniformly in the circumferential direction. In this way, the intermediate member 20 is partially and rapidly heated by the high frequency heating device 22.

冷却装置２３は、高周波加熱装置２２により加熱された中間部材２０の送り方向について第２の位置Ｂよりも下流の第３の位置Ｃにおいて第２の位置Ｂで加熱された部分を冷却する。   The cooling device 23 cools the portion heated at the second position B at the third position C downstream of the second position B in the feed direction of the intermediate member 20 heated by the high-frequency heating device 22.

冷却装置２３は、中間部材２０の送り方向について第２の位置Ｂよりも下流の第３の位置Ｃにおいて、送られる中間部材２０を、第２の位置Ｂで加熱された部分を冷却するためのものである。すなわち、中間部材２０は位置Ｂ〜位置Ｃ間において高温に加熱されて変形抵抗が大幅に低下した状態にある。   The cooling device 23 is for cooling the intermediate member 20 that is fed at the second position B in the third position C downstream of the second position B in the feeding direction of the intermediate member 20. Is. That is, the intermediate member 20 is heated to a high temperature between the positions B to C, and the deformation resistance is greatly reduced.

冷却装置２３としては、所望の冷却速度が得られるものであればよく、特定の方式の冷却装置に限定する必要はない。一般的には、冷却水を中間部材２０の外周面の所定の位置へ向けて噴射することにより中間部材２０を冷却する水冷装置を用いることが例示される。   The cooling device 23 is not limited to a specific type of cooling device as long as a desired cooling rate can be obtained. In general, using a water cooling device that cools the intermediate member 20 by injecting cooling water toward a predetermined position on the outer peripheral surface of the intermediate member 20 is exemplified.

冷却水は、中間部材２０が送り出される方向へ向けて傾斜して吹き付けられるとともに、中間部材２０の軸方向と直交する方向と平行な方向に関する、この中間部材２０に対する冷却手段の距離を変更することによって、この中間部材２０の加熱される軸方向の領域を調整することができる。このようにして、中間部材２０は、冷却装置２３により、高周波加熱装置２２により加熱された部分を急速に冷却される。   Cooling water is inclined and sprayed in the direction in which the intermediate member 20 is sent out, and the distance of the cooling means relative to the intermediate member 20 with respect to a direction parallel to the direction orthogonal to the axial direction of the intermediate member 20 is changed. Thus, the axial region of the intermediate member 20 to be heated can be adjusted. In this way, the intermediate member 20 is rapidly cooled by the cooling device 23 at the portion heated by the high-frequency heating device 22.

図４（ａ）および図４（ｂ）は、いずれも、高周波加熱装置２２による加熱や冷却装置２３による冷却の不均一に起因して屈曲部材２１に発生する寸法変化の一例を模式的に示す説明図である。   4 (a) and 4 (b) schematically show examples of dimensional changes that occur in the bending member 21 due to non-uniformity of heating by the high-frequency heating device 22 and cooling by the cooling device 23. FIG. It is explanatory drawing.

屈曲部材２１には、高周波加熱装置２２による加熱や冷却装置２３による冷却の不均一に起因して、図４（ａ）に示すように扁平閉断面形状を構成する各辺２１ａ〜２１ｄがその内側へ向けて膨出する寸法変化や、図４（ｂ）に示すように各辺２１ａ〜２１ｄがその外側へ向けて膨出する寸法変化が発生することがある。   Due to non-uniformity of heating by the high-frequency heating device 22 and cooling by the cooling device 23, the bending member 21 has sides 21 a to 21 d constituting a flat closed cross-sectional shape as shown in FIG. There may be a dimensional change that bulges out or a dimensional change in which each side 21a to 21d bulges outward as shown in FIG. 4B.

このような寸法変化は、高周波加熱装置２２による加熱や冷却装置２３による冷却の際に、扁平閉断面形状を構成する各辺２１ａ〜２１ｄや各頂点２１ｅ〜２１ｈが有する熱容量が不可避的に一定でないことや、扁平閉断面形状を構成する各辺２１ａ〜２１ｄや各頂点２１ｅ〜２１ｈに噴射される冷却水の噴射量が、例えば各頂点２１ｅ〜２１ｈにおける冷却水の跳ね返りの程度が一定しないこと等に起因して、狙い通りになり難いことに依るものと解される。   Such a dimensional change is inevitable that the heat capacities of the sides 21a to 21d and the apexes 21e to 21h constituting the flat closed cross-sectional shape are inevitably constant during heating by the high-frequency heating device 22 or cooling by the cooling device 23. That is, the amount of cooling water sprayed to each side 21a to 21d and each vertex 21e to 21h constituting the flat closed cross-sectional shape is, for example, that the degree of rebounding of the cooling water at each vertex 21e to 21h is not constant, etc. It is understood that it depends on the fact that it is difficult to achieve as intended.

図５（ａ）、図５（ｂ）は、それぞれ、図４（ａ）、図４（ｂ）に示す寸法変化が発生した屈曲部材２１に対する従来の補正手段の一例を模式的に示す説明図である。
一般的には、熱処理された部分は、硬度が上昇しているため、図５（ａ）に示すように、図４（ａ）に示す寸法変化が発生した屈曲部材２１に対しては、上下一対の鼓状の水平ロール２５ａ、２５ｂおよび左右一対の鼓状の垂直ロール２６ａ、２６ｂを備える圧下装置２４による圧下を行う形状矯正や、また、図５（ｂ）に示すように、図４（ｂ）に示す寸法変化が発生した屈曲部材２１に対しては、図示しない上型および下型２７ｂを備えるプレス機２７による圧下を行う形状矯正を行うこととなるが、このような対策では、発生した寸法誤差を適正な値に補正することは極めて難しい。 FIGS. 5A and 5B are explanatory diagrams schematically showing an example of conventional correction means for the bending member 21 in which the dimensional change shown in FIGS. 4A and 4B has occurred. It is.
In general, since the hardness of the heat-treated portion is increased, as shown in FIG. 5A, the bending member 21 in which the dimensional change shown in FIG. Shape correction for reduction by a reduction device 24 including a pair of hourglass-shaped horizontal rolls 25a and 25b and a pair of left and right hourglass-shaped vertical rolls 26a and 26b, and as shown in FIG. For the bending member 21 in which the dimensional change shown in b) occurs, shape correction is performed by pressing with a press machine 27 including an upper die 27b and a lower die 27b (not shown). It is extremely difficult to correct the measured dimensional error to an appropriate value.

これに対し、本発明により製造しようとする屈曲部材２１が高い寸法精度を要求される場合に、特に中間部材２０の断面が丸断面ではなくて矩形断面や偏平断面であるときには、曲げモーメントを与えられることによる寸法変化のみならず、図４（ａ）および図４（ｂ）に例示する、加熱や冷却の不均一が原因と考えられる寸法変化もできるだけ抑制するために、曲げ加工を行われた屈曲部材２１における曲げ加工部の三次元形状を計測し、三次元形状の計測値および目標値との偏差に基づいて、この屈曲部材２１の後に曲げ加工を行われる中間部材２０の、曲げ加工前の三次元形状を補正する補正加工を行うことによって、加熱や冷却の不均一に起因する寸法変化をも補正することができるように曲げ加工前の中間部材２０の扁平閉断面形状２０ａの各部寸法を変更する。   On the other hand, when the bending member 21 to be manufactured according to the present invention requires high dimensional accuracy, a bending moment is applied particularly when the cross section of the intermediate member 20 is not a round cross section but a rectangular cross section or a flat cross section. In order to suppress as much as possible the dimensional change considered to be caused by non-uniform heating and cooling as illustrated in FIG. 4A and FIG. The bending member 21 measures the three-dimensional shape of the bent portion, and based on the deviation between the measured value and the target value of the three-dimensional shape, the intermediate member 20 that is bent after the bending member 21 is bent. By performing correction processing for correcting the three-dimensional shape of the intermediate member 20 before bending, the flat closed cross-sectional shape of the intermediate member 20 can be corrected so that dimensional changes due to non-uniform heating and cooling can be corrected. To change the various dimensions of 20a.

また、冷却装置２３による水冷の開始温度および冷却速度を適宜調整することにより、中間部材２０における急速冷却部の一部または全部を焼入れることも可能である。これにより、中間部材２０の一部または全部の強度を、例えば１５００ＭＰａ以上と大幅に高めることが可能である。   In addition, by appropriately adjusting the start temperature and the cooling rate of water cooling by the cooling device 23, it is possible to quench part or all of the rapid cooling section in the intermediate member 20. Thereby, the intensity | strength of a part or all of the intermediate member 20 can be raised significantly, for example with 1500 Mpa or more.

このようにして、長手方向へ送られる中間部材２０の一部に、高周波加熱装置２２により部分的に加熱されて変形抵抗が大幅に低下した部分を形成してから、中間部材２０の送り方向について第３の位置Ｃよりも下流の領域で、中間部材２０を把持する把持手段である可動ローラダイス２８における一対の可動ロール２８ａ、２８ａの位置を、中間部材２０における少なくとも一対の長辺１９、１９と略平行な面内で二次元または三次元の方向へ変更して、中間部材２０における加熱された部分に曲げモーメントを与える。   In this way, a part of the intermediate member 20 sent in the longitudinal direction is partially heated by the high-frequency heating device 22 and the deformation resistance is greatly reduced, and then the intermediate member 20 is fed in the feeding direction. In the region downstream of the third position C, the position of the pair of movable rolls 28a, 28a in the movable roller die 28, which is a gripping means for gripping the intermediate member 20, is defined as at least a pair of long sides 19, 19 in the intermediate member 20. Is changed in a two-dimensional or three-dimensional direction in a plane substantially parallel to the surface, and a bending moment is applied to the heated portion of the intermediate member 20.

把持手段は、中間部材２０の送り方向について第３の位置Ｃよりも下流の領域Ｄで、送られる中間部材２０を支持しながら、第１の位置Ａよりも中間部材２０の送り方向の上流側において、少なくとも中間部材２０の送り方向を含む二次元または三次元の方向へ移動することによって、中間部材２０における、高周波加熱装置２２により加熱された部分に曲げモーメントを与えるためのものである。   The gripping means supports the intermediate member 20 to be sent in a region D downstream of the third position C in the feed direction of the intermediate member 20, while upstream of the first member A in the feed direction of the intermediate member 20. In FIG. 5, the bending member is given a bending moment to a portion of the intermediate member 20 heated by the high-frequency heating device 22 by moving in at least a two-dimensional or three-dimensional direction including the feeding direction of the intermediate member 20.

把持手段としては、上述した可動ローラダイス２８以外に、中間部材２０を把持するチャック機構を用いることができる。
把持手段を、中間部材２０における少なくとも一対の長辺１９、１９と略平行な面内で二次元または三次元に移動することにより、後述する図６に実線で示す屈曲部材２１を製造することができるが、この把持手段を捻じるように移動するとともにこれに高周波加熱装置２２および冷却装置２３を同調させて動作させることにより、同じく図６に破線で示す形状の屈曲部材２１を製造することもできる。このように捻じり部を形成することにより、中間部材２０の剛性をさらに高めることができる。さらに、把持手段を上下方向にも移動するとともにこれに高周波加熱装置２２および冷却装置２３を同調させて動作させることにより、図６に一点鎖線で示す、面外変形した形状の屈曲部材２１を製造することもできる。 As the gripping means, in addition to the movable roller die 28 described above, a chuck mechanism that grips the intermediate member 20 can be used.
By moving the gripping means two-dimensionally or three-dimensionally in a plane substantially parallel to at least the pair of long sides 19, 19 in the intermediate member 20, a bending member 21 indicated by a solid line in FIG. However, it is also possible to manufacture the bending member 21 having the shape shown by the broken line in FIG. 6 by moving the gripping means so as to twist and operating the high-frequency heating device 22 and the cooling device 23 in synchronization therewith. it can. By forming the twisted portion in this way, the rigidity of the intermediate member 20 can be further increased. Further, by moving the gripping means in the vertical direction and operating the high-frequency heating device 22 and the cooling device 23 in synchronization therewith, a bending member 21 having an out-of-plane deformed shape shown by a one-dot chain line in FIG. 6 is manufactured. You can also

なお、以上の説明では、加工素材である鋼管１５をその長手方向へ送るとともに、上下一対の水平ロール１８ａ、１８ｂ、支持手段１１、高周波加熱装置２２および冷却装置２３を、鋼管１５の送り方向に対して固定して配置する態様を例にとったが、これに限定されるものではなく、これとは逆に、加工素材である鋼管１５を固定して配置するとともに、上下一対の水平ロール１８ａ、１８ｂ、支持手段１１、高周波加熱装置２２および水冷装置２３を、鋼管１５の長手方向に対して移動自在に配置するようにしてもよい。   In the above description, the steel pipe 15 which is a processing material is fed in the longitudinal direction, and the pair of upper and lower horizontal rolls 18a and 18b, the support means 11, the high-frequency heating device 22 and the cooling device 23 are moved in the feeding direction of the steel pipe 15. However, the present invention is not limited to this, and conversely, the steel pipe 15 that is a work material is fixed and arranged, and a pair of upper and lower horizontal rolls 18a. 18b, the support means 11, the high-frequency heating device 22, and the water cooling device 23 may be arranged so as to be movable with respect to the longitudinal direction of the steel pipe 15.

このように、加工手段１２は、中間部材２０の送り方向について第２の位置Ｂよりも下流の第３の位置Ｃにおいて第２の位置Ｂで加熱された部分を冷却するとともに、中間部材２０の送り方向について第３の位置Ｃよりも下流の領域で、中間部材２０を把持する可動ローラダイス２８の位置を、二次元または三次元で変更して、中間部材２０における加熱された部分に曲げモーメントを与えることによって中間部材２０に曲げ加工を行う。   In this way, the processing means 12 cools the portion heated at the second position B at the third position C downstream of the second position B in the feed direction of the intermediate member 20, and In a region downstream of the third position C in the feed direction, the position of the movable roller die 28 that grips the intermediate member 20 is changed two-dimensionally or three-dimensionally, and a bending moment is applied to the heated portion of the intermediate member 20. By bending the intermediate member 20, the intermediate member 20 is bent.

（ｉｖ）計測手段１３
計測手段１３は、加工手段１２により曲げ加工を行われた部分の三次元形状を計測するためのものであり、特定の型式のものには限定されない。また、計測手段としてはレーザー等を利用した非接触の三次元計測機が好ましいが、加工形状によっては一次元計測機、二次元計測機や接触式等、等しく適用可能である。 (Iv) Measuring means 13
The measuring means 13 is for measuring the three-dimensional shape of the part bent by the processing means 12, and is not limited to a specific type. Further, as the measuring means, a non-contact three-dimensional measuring machine using a laser or the like is preferable, but a one-dimensional measuring machine, a two-dimensional measuring machine, a contact type, or the like is equally applicable depending on the processing shape.

図１に示す計測手段１３は、加工手段１２により曲げ加工を行われた屈曲部材２１の屈曲部全周の三次元形状を計測する計測部２９ａ、２９ｂ、２９ｃと、計測部２９ａ、２９ｂ、２９ｃの出力に基づいて演算を行うことによって加工手段１２により曲げ加工を行われた部分全周の三次元形状を求め、求めた演算結果に基づいて、この屈曲部材２１の後に曲げ加工を行われる中間部材２０の、曲げ加工前の三次元形状を補正する補正加工を行う補正加工手段１４に制御信号を出力して、中間部材２０の補正加工を行う演算制御部３０とを有する。   The measuring means 13 shown in FIG. 1 includes measuring parts 29a, 29b, and 29c that measure the three-dimensional shape of the entire circumference of the bending part of the bending member 21 that has been bent by the processing means 12, and measuring parts 29a, 29b, and 29c. By calculating on the basis of the output, the three-dimensional shape of the entire circumference that has been bent by the processing means 12 is obtained, and based on the obtained calculation result, the bending process is performed after the bending member 21. An arithmetic control unit 30 that outputs a control signal to the correction processing means 14 that performs correction processing for correcting the three-dimensional shape of the member 20 before bending, and performs correction processing of the intermediate member 20 is provided.

なお、以上の説明では、計測手段１３が本発明に係る製造装置１０にオンライン設置された形態を例にとった。しかし、本発明はこの形態に限定されるものではなく、補正加工手段１４が、この製造装置１０により製造された屈曲部材２１の後に曲げ加工を行われる素材１５の、曲げ加工前の三次元形状を補正する補正加工を行うものであること、具体的には、補正加工手段１４が、この製造装置１０により曲げ加工を行われた屈曲部材２１における曲げ加工部の三次元形状の計測結果に基づいて、屈曲部材２１の後に曲げ加工を行われる素材１５の、曲げ加工前の三次元形状を補正する補正加工を行うものであることが望ましい。   In the above description, an example in which the measuring unit 13 is installed online in the manufacturing apparatus 10 according to the present invention has been taken. However, the present invention is not limited to this form, and the three-dimensional shape before bending of the material 15 in which the correction processing means 14 performs bending after the bending member 21 manufactured by the manufacturing apparatus 10. Specifically, the correction processing means 14 is based on the measurement result of the three-dimensional shape of the bending portion of the bending member 21 that has been bent by the manufacturing apparatus 10. Thus, it is desirable to perform a correction process for correcting the three-dimensional shape of the material 15 to be bent after the bending member 21 before the bending process.

例えば、この製造装置１０により曲げ加工を行われてオフラインされた屈曲部材２１における曲げ加工部の三次元形状を、例えば作業者が手動で計測し、この計測結果に基づいて補正加工手段１４の設定値を新たな値に変更して、この屈曲部材２１の後に製造装置１０により曲げ加工を行われる素材１５の、曲げ加工前の三次元形状を補正する補正加工を行うようにしてもよい。これによれば、上述した計測手段１３を製造装置１０にオンライン設置する必要がなくなるので、設備費の上昇をできるだけ抑制することが可能である。   For example, the operator manually measures, for example, the three-dimensional shape of the bent portion of the bending member 21 that has been bent by the manufacturing apparatus 10 and is offline, and the correction processing means 14 is set based on the measurement result. The value may be changed to a new value, and correction processing for correcting the three-dimensional shape before bending of the material 15 to be bent by the manufacturing apparatus 10 after the bending member 21 may be performed. According to this, since it is not necessary to install the above-mentioned measuring means 13 on the manufacturing apparatus 10 online, it is possible to suppress an increase in equipment cost as much as possible.

本発明に係る製造装置１０は、以上のように構成される。次に、本発明に係る製造装置１０により屈曲部材２１を製造する状況を説明する。
はじめに、閉断面形状を有するとともに長手方向へ一体に構成される長尺の素材である鋼管１５が、送り装置１６によりその長手方向へ相対的に送られながら、水平ロール１８ａ、１８ｂによって、対向して配置される一対の長辺１９、１９を有する中空の扁平閉断面形状２０ａを有する鋼製の長尺の中間部材２０に加工される。 The manufacturing apparatus 10 according to the present invention is configured as described above. Next, a situation where the bending member 21 is manufactured by the manufacturing apparatus 10 according to the present invention will be described.
First, a steel pipe 15 which is a long material having a closed cross-sectional shape and integrally formed in the longitudinal direction is opposed by horizontal rolls 18a and 18b while being relatively fed by the feeding device 16 in the longitudinal direction. It is processed into a steel long intermediate member 20 having a hollow flat closed cross-sectional shape 20 a having a pair of long sides 19, 19.

次に、扁平閉断面形状２０ａを有する中間部材２０は、第１の位置Ａにおいて支持部材１１により支持され、鋼管１５の送り方向について第１の位置Ａよりも下流の第２の位置Ｂにおいて高周波加熱装置２２により部分的に加熱される。   Next, the intermediate member 20 having the flat closed cross-sectional shape 20a is supported by the support member 11 at the first position A, and has a high frequency at the second position B downstream of the first position A in the feed direction of the steel pipe 15. It is partially heated by the heating device 22.

次に、高周波加熱装置２２により部分的に加熱された中間部材２０は、第２の位置Ｂよりも下流の第３の位置Ｃにおいて冷却装置２３により第２の位置Ｂで加熱された部分を冷却される。   Next, the intermediate member 20 partially heated by the high frequency heating device 22 cools the portion heated at the second position B by the cooling device 23 at the third position C downstream from the second position B. Is done.

さらに、第３の位置Ｃにおいて冷却された中間部材２０は、第３の位置よりも下流の領域Ｄにおいて、把持される把持手段の位置が二次元または三次元で変更されることにより、中間部材２０における加熱された部分に曲げモーメントを与えられることによって中間部材２０に素材に曲げ加工を行われて、所望の形状を有する屈曲部材２１に加工される。   Further, the intermediate member 20 cooled at the third position C is changed in the region D downstream of the third position by changing the position of the gripping means to be gripped in two dimensions or three dimensions. By applying a bending moment to the heated portion of 20, the intermediate member 20 is bent into a material and processed into a bending member 21 having a desired shape.

この際に、本発明では、中間部材２０における曲げ加工を行われた部分の三次元形状を計測手段１３の計測部２９ａ、２９ｂ、２９ｃにより計測し、演算制御部３０により、三次元形状の計測値および目標値との偏差に基づいて補正加工手段１４に制御信号を出力することによって、中間部材２０における曲げ加工を行われていない部分の三次元形状を補正する補正加工を行うことによって、屈曲部材２１を製造する。   At this time, in the present invention, the three-dimensional shape of the bent portion of the intermediate member 20 is measured by the measuring units 29a, 29b, 29c of the measuring means 13, and the three-dimensional shape is measured by the arithmetic control unit 30. By outputting a control signal to the correction processing means 14 based on the deviation from the value and the target value, the bending process is performed by correcting the three-dimensional shape of the portion of the intermediate member 20 that has not been bent. The member 21 is manufactured.

例えば、素材である金属製の長尺の扁平な素材に曲げ加工を行う場合に、与えられる曲げモーメント、第２の位置Ｂで行われる素材の加熱、または、第３の位置Ｃで行われる素材の冷却の少なくとも一つに起因して発生する屈曲部材２１における曲げ加工部の三次元の寸法変化を、計測手段１３により測定し、それを補正するために補正加工手段１４によって、この屈曲部材２１の後に曲げ加工を行われる中間部材２１の、曲げ加工前の三次元形状を補正する補正加工を行う。例えば、幅Ｗ０、高さＨ０の矩形断面の素材における曲げ加工を行われた部分に発生した差異量ΔＷ、ΔＨを加味して、曲げ加工後の幅、高さが目標寸法Ｗ０’、高さＨ０’となるように、曲げ加工前の素材の幅を（Ｗ０＋ΔＷ）とし、曲げ外周側であるＡ側の高さを（Ｈ０＋ΔＨ）とし、曲げ外周側であるＢ側の高さを（Ｈ０−ΔＨ’）として、曲げ加工を行う。 For example, when bending a long metal flat material, the bending moment applied, the heating of the material performed at the second position B, or the material performed at the third position C The three-dimensional dimensional change of the bent portion of the bending member 21 caused by at least one of the cooling is measured by the measuring means 13, and the bending member 21 is corrected by the correction processing means 14 to correct it. Thereafter, correction processing for correcting the three-dimensional shape of the intermediate member 21 to be bent before the bending processing is performed. For example, considering the difference amounts ΔW and ΔH generated in the bent portion of the rectangular cross-section material having the width W 0 and the height H 0 , the width and height after the bending are the target dimensions W 0 ′. , The width of the material before bending is (W 0 + ΔW), the height of the A side on the bending outer side is (H 0 + ΔH), and B is the outer side of the bending so that the height H 0 ′ is obtained. Bending is performed with the side height as (H 0 −ΔH ′).

このため、本発明によれば、円形閉断面形状の素材のみならず、扁平閉断面形状の素材に対しても優れた寸法精度を実現することができる。特に、扁平閉断面形状の素材は、中間部材２０に与えられる曲げモーメント、第２の位置Ｂで行われる中間部材２０の加熱、または、第３の位置Ｃで行われる中間部材２０の冷却の少なくとも一つに起因して発生する寸法変化を予測することが極めて困難であるため、本発明は産業上特に有用である。   For this reason, according to the present invention, it is possible to realize excellent dimensional accuracy not only for a material having a circular closed cross section but also for a material having a flat closed cross section. In particular, the material having the flat closed cross-sectional shape is at least a bending moment applied to the intermediate member 20, heating of the intermediate member 20 performed at the second position B, or cooling of the intermediate member 20 performed at the third position C. The present invention is particularly useful in industry because it is extremely difficult to predict the dimensional change that occurs due to one.

図６は、本発明により製造される屈曲部材２１の構成例を、簡略化および概念化して示す説明図である。
同図に示すように、この屈曲部材２１は、長手方向へ一体に構成される鋼製の長尺の部材である。屈曲部材２１は、対向して配置される一対の長辺１９、１９を有する中空の扁平閉断面形状２０ａを、その長手方向の全域で有する。 FIG. 6 is an explanatory view showing a configuration example of the bending member 21 manufactured according to the present invention in a simplified and conceptualized manner.
As shown in the figure, the bending member 21 is a long steel member configured integrally in the longitudinal direction. The bending member 21 has a hollow flat closed cross-sectional shape 20a having a pair of long sides 19 and 19 arranged to face each other in the entire lengthwise direction.

この屈曲部材２１は、少なくとも、一対の長辺１９、１９と略平行な面３１内で、二次元または三次元に屈曲する屈曲部３２を有する。
さらに、この屈曲部材２１は、長手方向へ向けて少なくとも第１の部分３３および第２の部分３４を備え、第１の部分３３に含まれる一対の長辺１９、１９と、第２の部分３４に含まれる一対の長辺１９、１９とが互いに異なる平面内に存在するように、第１の部分３３と第２の部分３４との間にねじり部３５や、あるいは曲げ部３６を有していてもよい。図６において、屈曲部材２１が破線で示す輪郭を有する場合がねじり部３５を有する場合であり、屈曲部材２１が一点鎖線で示す輪郭を有する場合が曲げ部３６を有する場合である。 The bending member 21 has a bending portion 32 that bends two-dimensionally or three-dimensionally at least in a plane 31 substantially parallel to the pair of long sides 19 and 19.
Further, the bending member 21 includes at least a first portion 33 and a second portion 34 in the longitudinal direction, and a pair of long sides 19 and 19 included in the first portion 33 and a second portion 34. The twisted portion 35 or the bent portion 36 is provided between the first portion 33 and the second portion 34 so that the pair of long sides 19 and 19 included in each other exist in different planes. May be. In FIG. 6, the case where the bending member 21 has a contour indicated by a broken line is a case where the torsion portion 35 is provided, and the case where the bending member 21 has an outline indicated by a one-dot chain line is a case where the bending portion 36 is provided.

本発明により製造される屈曲部材２１は、中空の扁平閉断面形状を有することから軽量かつ小型であるとともに、上述したように冷却装置２３による水冷の開始温度および冷却速度を適宜調整して引張強度を例えば１５００ＭＰａ以上と大幅に高めることによって、いっそうの小型化、軽量化さらには高強度化を図ることができる。   The bending member 21 manufactured according to the present invention is light and small because it has a hollow flat closed cross-sectional shape, and has a tensile strength by appropriately adjusting the start temperature and cooling rate of water cooling by the cooling device 23 as described above. For example, by significantly increasing the pressure to, for example, 1500 MPa or more, further reduction in size, weight, and strength can be achieved.

また、この屈曲部材２１は、上述したように冷却装置２３による水冷の開始温度および冷却速度を適宜調整して焼入れを行われることによって、その外表面に圧縮の残留応力が発生するため、疲労強度も向上する。   Further, since the bending member 21 is subjected to quenching by appropriately adjusting the water cooling start temperature and the cooling rate by the cooling device 23 as described above, a compressive residual stress is generated on the outer surface thereof. Will also improve.

また、この屈曲部材２１の本発明に係る製造工程は、図１を参照しながら説明したように極めて簡便であり、低コストで製造することが可能である。
さらに、本発明では、図２や図４を参照しながら説明したように、曲げモーメントを与えられることによる寸法変化と、加熱や冷却の不均一が原因と考えられる寸法変化とをいずれも加味して、曲げ加工後の幅、高さが目標寸法Ｗ０’、高さＨ０’となるように、曲げ加工前の扁平閉断面形状の各部寸法を決定することにより、極めて高い寸法精度を有する屈曲部材２１を製造することもできる。 Further, the manufacturing process of the bending member 21 according to the present invention is extremely simple as described with reference to FIG. 1 and can be manufactured at low cost.
Furthermore, in the present invention, as described with reference to FIG. 2 and FIG. 4, the dimensional change caused by the bending moment and the dimensional change considered to be caused by uneven heating and cooling are both taken into account. By determining the dimensions of each part of the flat closed cross-sectional shape before bending so that the width and height after bending are the target dimensions W 0 ′ and height H 0 ′, extremely high dimensional accuracy is achieved. The bending member 21 can also be manufactured.

この本発明に係る製造方法により製造される屈曲部材２１は、例えば、以下に例示する用途（ｉ）〜（ｖｉｉ）に対して適用可能である。
（ｉ）自動車のサスペンションのロアーアームやブレーキペダルといった自動車の強度部材、
（ｉｉ）自動車の各種レインフォース、ブレース等の補強部材、
（ｉｉｉ）サイドメンバー、サスペンションマウントメンバー、ピラー、サイドシル等の自動車の構造部材、
（ｉｖ）自転車や自動二輪車等のフレーム、クランク
（ｖ）電車等の車輛の補強部材、台車部品（台車枠、各種梁等）
（ｖｉ）船体等のフレーム部品、補強部材、
（ｖｉｉ）家電製品の強度部材、補強部材または構造部材
このようにして、本発明に係る製造装置１０によれば、曲げ加工を行われた屈曲部材２１における曲げ加工部の三次元形状を計測し、三次元形状の計測結果に基づいて、この屈曲部材２１の後に曲げ加工を行われる中間部材２０の、曲げ加工前の三次元形状を補正する補正加工を行うので、優れた寸法精度を有する屈曲部材２１を製造することが可能になる。 The bending member 21 manufactured by the manufacturing method according to the present invention is applicable to, for example, uses (i) to (vii) exemplified below.
(I) Automotive strength members such as lower arms and brake pedals of automobile suspensions;
(Ii) Reinforcing members such as various types of automobile reinforcements and braces,
(Iii) automotive structural members such as side members, suspension mount members, pillars, side sills,
(Iv) Frames for bicycles and motorcycles, cranks (v) Reinforcing members for vehicles such as trains, bogie parts (bogie frames, various beams, etc.)
(Vi) Frame parts such as hulls, reinforcing members,
(Vii) Strength member, reinforcing member, or structural member of home appliance In this way, according to the manufacturing apparatus 10 according to the present invention, the three-dimensional shape of the bent portion of the bent member 21 that has been bent is measured. Based on the measurement result of the three-dimensional shape, the intermediate member 20 to be bent after the bending member 21 is subjected to correction processing for correcting the three-dimensional shape before the bending processing, so that bending with excellent dimensional accuracy is performed. The member 21 can be manufactured.

１ 特許文献１により開示された曲げ加工装置
２ 支持手段
３ 金属材
４ 送り装置
５ 屈曲部材
６ 高周波加熱コイル
７ 水冷装置
８ 可動ロールダイス
８ａ ロール
９ａ 異形管
９ｂ 屈曲部材
１０ 本発明に係る製造装置
１１ 支持手段
１１ａ、１１ｂ 従動ロール
１２ 加工手段
１３ 計測手段
１４ 補正加工手段
１５ 鋼管
１５ａ 閉断面形状
１６ 送り装置
１７ つかみ部
１８ａ、１８ｂ 水平ロール
１９ 長辺
２０ 中間部材
２０ａ 扁平閉断面形状
２１ 屈曲部材
２１ａ〜２１ｄ 辺
２１ｅ〜２１ｈ 頂点
２２ 高周波加熱装置
２３ 冷却装置
２４ 圧下装置
２５ａ、２５ｂ 水平ロール
２６ａ ２６ｂ垂直ロール
２７ プレス機
２７ｂ 下型
２８ 可動ローラダイス
２８ａ 可動ロール
２９ａ、２９ｂ、２９ｃ 計測部
３０ 演算制御部
３１ 面
３２ 屈曲部
３３ 第１の部分
３４ 第２の部分
３５ ねじり部
３６ 曲げ部 DESCRIPTION OF SYMBOLS 1 Bending apparatus 2 disclosed by patent document 1 Support means 3 Metal material 4 Feeding device 5 Bending member 6 High-frequency heating coil 7 Water cooling device 8 Movable roll die 8a Roll 9a Deformed pipe 9b Bending member 10 Manufacturing apparatus 11 according to the present invention Support means 11a, 11b Followed roll 12 Processing means 13 Measuring means 14 Correction processing means 15 Steel pipe 15a Closed cross-sectional shape 16 Feeder 17 Grasp 18a, 18b Horizontal roll 19 Long side 20 Intermediate member 20a Flat closed cross-sectional shape 21 Bending member 21a- 21d Sides 21e to 21h Vertex 22 High-frequency heating device 23 Cooling device 24 Reduction devices 25a and 25b Horizontal rolls 26a 26b Vertical rolls 27 Press machine 27b Lower mold 28 Movable roller dies 28a Movable rolls 29a, 29b and 29c Measuring unit 30 Operation control unit 31 Surface 32 bent portion 33 first portion 34 first 2 part 35 torsion part 36 bending part

Claims (7)

閉断面形状を有するとともに長手方向へ一体に構成される金属製の長尺の素材を、その長手方向へ相対的に送りながら第１の位置において支持する支持手段と、
該素材の送り方向について前記第１の位置よりも下流の第２の位置において送られる素材を部分的に加熱し、素材の送り方向について前記第２の位置よりも下流の第３の位置において前記第２の位置で加熱された部分を冷却するとともに、素材の送り方向について前記第３の位置よりも下流の領域で、前記素材を把持する把持手段の位置を、二次元または三次元で変更して、前記素材における前記加熱された部分に曲げモーメントを与えることによって該素材に曲げ加工を行って屈曲部材を製造する加工手段と、
前記素材の送り方向について前記加工手段よりも上流に配置され、前記屈曲部材の後に曲げ加工を行われる素材の、曲げ加工前の三次元形状を補正する補正加工を行う補正加工手段と
を備えることを特徴とする補正機能を有する屈曲部材の製造装置。 A supporting means for supporting a metal long material having a closed cross-sectional shape and being integrally formed in the longitudinal direction at a first position while relatively feeding in the longitudinal direction;
The material to be fed at a second position downstream of the first position with respect to the feed direction of the material is partially heated, and the material at the third position downstream of the second position with respect to the feed direction of the material. The portion heated at the second position is cooled, and the position of the gripping means for gripping the material is changed two-dimensionally or three-dimensionally in a region downstream of the third position in the material feeding direction. Processing means for producing a bending member by bending the material by applying a bending moment to the heated portion of the material;
Correction processing means that performs correction processing for correcting the three-dimensional shape before bending of the material that is arranged upstream of the processing means in the feed direction of the material and that is bent after the bending member. The manufacturing apparatus of the bending member which has a correction function characterized by these. 閉断面形状を有するとともに長手方向へ一体に構成される金属製の長尺の素材を、その長手方向へ相対的に送りながら第１の位置において支持する支持手段と、
該素材の送り方向について前記第１の位置よりも下流の第２の位置において送られる素材を部分的に加熱し、素材の送り方向について前記第２の位置よりも下流の第３の位置において前記第２の位置で加熱された部分を冷却するとともに、素材の送り方向について前記第３の位置よりも下流の領域で、前記素材を把持する把持手段の位置を、二次元または三次元で変更して、前記素材における前記加熱された部分に曲げモーメントを与えることによって該素材に曲げ加工を行って屈曲部材を製造する加工手段と、
前記素材の送り方向について前記加工手段よりも上流に配置され、前記曲げ加工を行われた屈曲部材における曲げ加工部の三次元形状の計測結果に基づいて、前記屈曲部材の後に曲げ加工を行われる素材の、曲げ加工前の三次元形状を補正する補正加工を行う補正加工手段と
を備えることを特徴とする補正機能を有する屈曲部材の製造装置。 A supporting means for supporting a metal long material having a closed cross-sectional shape and being integrally formed in the longitudinal direction at a first position while relatively feeding in the longitudinal direction;
The material to be fed at a second position downstream of the first position with respect to the feed direction of the material is partially heated, and the material at the third position downstream of the second position with respect to the feed direction of the material. The portion heated at the second position is cooled, and the position of the gripping means for gripping the material is changed two-dimensionally or three-dimensionally in a region downstream of the third position in the material feeding direction. Processing means for producing a bending member by bending the material by applying a bending moment to the heated portion of the material;
Based on the measurement result of the three-dimensional shape of the bending portion of the bending member that is arranged upstream of the processing means in the feed direction of the material and has been bent, the bending processing is performed after the bending member. An apparatus for manufacturing a bending member having a correction function, comprising: correction processing means for performing correction processing for correcting a three-dimensional shape of a material before bending. 閉断面形状を有するとともに長手方向へ一体に構成される金属製の長尺の素材を、その長手方向へ相対的に送りながら第１の位置において支持する支持手段と、
該素材の送り方向について前記第１の位置よりも下流の第２の位置において送られる素材を部分的に加熱し、素材の送り方向について前記第２の位置よりも下流の第３の位置において前記第２の位置で加熱された部分を冷却するとともに、素材の送り方向について前記第３の位置よりも下流の領域で、前記素材を把持する把持手段の位置を、二次元または三次元で変更して、前記素材における前記加熱された部分に曲げモーメントを与えることによって該素材に曲げ加工を行って屈曲部材を製造する加工手段と、
前記曲げ加工を行われた屈曲部材における曲げ加工部の三次元形状を計測する計測手段と、
前記素材の送り方向について前記加工手段よりも上流に配置され、前記計測手段による計測結果に基づいて前記屈曲部材の後に曲げ加工を行われる素材の、曲げ加工前の三次元形状を補正する補正加工を行う補正加工手段と
を備えることを特徴とする補正機能を有する屈曲部材の製造装置。 A supporting means for supporting a metal long material having a closed cross-sectional shape and being integrally formed in the longitudinal direction at a first position while relatively feeding in the longitudinal direction;
The material to be fed at a second position downstream of the first position with respect to the feed direction of the material is partially heated, and the material at the third position downstream of the second position with respect to the feed direction of the material. The portion heated at the second position is cooled, and the position of the gripping means for gripping the material is changed two-dimensionally or three-dimensionally in a region downstream of the third position in the material feeding direction. Processing means for producing a bending member by bending the material by applying a bending moment to the heated portion of the material;
Measuring means for measuring the three-dimensional shape of the bending portion in the bending member subjected to the bending processing;
Correction processing for correcting the three-dimensional shape before bending of the material that is arranged upstream of the processing means in the feed direction of the material and is bent after the bending member based on the measurement result by the measuring means An apparatus for manufacturing a bending member having a correction function, comprising: a correction processing means for performing the correction. 閉断面形状を有するとともに長手方向へ一体に構成される金属製の長尺の素材を、その長手方向へ相対的に送りながら第１の位置において支持し、該素材の送り方向について前記第１の位置よりも下流の第２の位置において送られる素材を部分的に加熱し、素材の送り方向について前記第２の位置よりも下流の第３の位置において前記第２の位置で加熱された部分を冷却するとともに、素材の送り方向について前記第３の位置よりも下流の領域で、前記素材を把持する把持手段の位置を、二次元または三次元で変更して、前記素材における前記加熱された部分に曲げモーメントを与えることによって前記素材に曲げ加工を行う屈曲部材の製造方法であって、
前記曲げ加工を行われた屈曲部材における曲げ加工部の三次元形状を計測し、該三次元形状の計測結果に基づいて、前記屈曲部材の後に曲げ加工を行われる素材の、曲げ加工前の三次元形状を補正する補正加工を行うこと
を特徴とする屈曲部材の製造方法。 A long metal material that has a closed cross-sectional shape and is integrally formed in the longitudinal direction is supported at a first position while being relatively fed in the longitudinal direction, and the first direction in the feeding direction of the material is The material fed at the second position downstream from the position is partially heated, and the portion heated at the second position at the third position downstream from the second position in the feed direction of the material. The heated portion of the material is cooled and the position of the gripping means for gripping the material is changed two-dimensionally or three-dimensionally in a region downstream from the third position in the material feeding direction. A bending member manufacturing method for bending the material by applying a bending moment to
Measuring the three-dimensional shape of the bending portion in the bending member that has been subjected to the bending, and based on the measurement result of the three-dimensional shape, the material that is to be bent after the bending member, before the bending A method for manufacturing a bending member, comprising performing a correction process for correcting an original shape. 前記補正加工は、前記第２の位置よりも上流に配置された一対のロールにより、行われる請求項４に記載された屈曲部材の製造方法。   The said correction process is a manufacturing method of the bending member described in Claim 4 performed by a pair of roll arrange | positioned upstream from the said 2nd position. 前記補正加工は、前記素材に与えられる前記曲げモーメント、前記第２の位置で行われる前記素材の加熱、または、前記第３の位置で行われる前記素材の冷却のうちの少なくとも一つに起因して発生する寸法誤差を相殺するように、行われる請求項４または請求項５に記載された屈曲部材の製造方法。   The correction processing is caused by at least one of the bending moment applied to the material, the heating of the material performed at the second position, or the cooling of the material performed at the third position. 6. The method for manufacturing a bending member according to claim 4, wherein the method is performed so as to cancel out a dimensional error caused by the bending. 閉断面形状を有するとともに長手方向へ一体に構成される金属製の長尺の素材を、その長手方向へ相対的に送りながら第１の位置において支持する支持手段と、
該素材の送り方向について前記第１の位置よりも下流の第２の位置において送られる素材を部分的に加熱し、素材の送り方向について前記第２の位置よりも下流の第３の位置において前記第２の位置で加熱された部分を冷却するとともに、素材の送り方向について前記第３の位置よりも下流の領域で、前記素材を把持する把持手段の位置を、二次元または三次元で変更して、前記素材における前記加熱された部分に曲げモーメントを与えることによって該素材に曲げ加工を行って屈曲部材を製造する加工手段と、
前記素材の送り方向について前記加工手段よりも上流に配置され、前記曲げ加工を行われた屈曲部材における曲げ加工部の三次元形状の予測結果に基づいて、前記屈曲部材の後に曲げ加工を行われる素材の、曲げ加工前の三次元形状を補正する補正加工を行う補正加工手段と
を備えることを特徴とする補正機能を有する屈曲部材の製造装置。 A supporting means for supporting a metal long material having a closed cross-sectional shape and being integrally formed in the longitudinal direction at a first position while relatively feeding in the longitudinal direction;
The material to be fed at a second position downstream of the first position with respect to the feed direction of the material is partially heated, and the material at the third position downstream of the second position with respect to the feed direction of the material. The portion heated at the second position is cooled, and the position of the gripping means for gripping the material is changed two-dimensionally or three-dimensionally in a region downstream of the third position in the material feeding direction. Processing means for producing a bending member by bending the material by applying a bending moment to the heated portion of the material;
Based on the prediction result of the three-dimensional shape of the bending portion of the bending member that is disposed upstream of the processing means in the feed direction of the material and has been bent, bending is performed after the bending member. An apparatus for manufacturing a bending member having a correction function, comprising: correction processing means for performing correction processing for correcting a three-dimensional shape of a material before bending.
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