JP5520570B2 - Equipment for manufacturing bending members made of hardened steel - Google Patents

Equipment for manufacturing bending members made of hardened steel Download PDF

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JP5520570B2
JP5520570B2 JP2009241588A JP2009241588A JP5520570B2 JP 5520570 B2 JP5520570 B2 JP 5520570B2 JP 2009241588 A JP2009241588 A JP 2009241588A JP 2009241588 A JP2009241588 A JP 2009241588A JP 5520570 B2 JP5520570 B2 JP 5520570B2
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steel material
inert gas
gas
steel pipe
reducing gas
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JP2011089150A (en
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和仁 今井
博紀 富士本
淳 富澤
ひとみ 西畑
三郎 井上
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Nippon Steel Corp
Nippon Steel Pipe Co Ltd
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本発明は、例えば焼入れ鋼管の焼入れ鋼材の製造方法に関する。 The invention, for example, relates to the production how hardening steel such as hardened steel.

周知のように、自動車や各種機械等に用いられる、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。従来よりこの種の部材は、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 used in automobiles, various machines, and the like is required to have high strength, light weight, and small size. Conventionally, this type of member has been manufactured by welding a pressed product, punching a thick plate, and forging. However, there is a limit to reducing the weight and size of the members manufactured by these manufacturing methods, and the realization thereof is not easy.

近年、これらの課題を可能にするために、例えば非特許文献1に開示されるハイドロフォームといわれる加工法が開発され、自動車部品に適用されるようになってきた。ハイドロフォームは、金型内に素材である管をセットし、高圧の加工液を管の内部に導入して管を膨出させ、管の外径を金型に沿わせることによって、複雑な形状の自動車部品を成形するものである。   In recent years, in order to enable these problems, a processing method called hydroform disclosed in Non-Patent Document 1, for example, has been developed and applied to automobile parts. Hydroform has a complicated shape by setting the material pipe in the mold, introducing a high-pressure machining fluid into the pipe to bulge the pipe, and aligning the outer diameter of the pipe with the mold. The automobile parts are molded.

すなわち、プレス加工による溶接品の溶接部位にはいわゆるフランジ部と呼ばれる余肉部が不可避的に必要であるために重量増加の要因となるのに対し、ハイドロフォームでは、管を素材とするためにフランジ部を省略しながら、複雑な形状の部品を一体成形することが可能であることから、自動車部品の軽量化が図られる。   In other words, a surplus part called a flange part is unavoidably necessary at the welded part of a welded product by press working, which causes an increase in weight, whereas hydroform uses a pipe as a raw material. Since it is possible to integrally mold parts having complicated shapes while omitting the flange portion, the weight of the automobile parts can be reduced.

しかしながら、ハイドロフォームには、(a)冷間加工であるため、例えば780MPa以上といった高強度の部材では、素材の延性がもともと小さいことから、複雑な形状の自動車部品の成形には限界があること、(b)一般的には、曲げ、プリフォーム及びハイドロフォームの3工程が必要となり、工程が比較的煩雑になること、及び(c)ハイドロフォーム機が大型で比較的高価であることといった問題がある。   However, because hydroforming is (a) cold work, high strength members such as 780 MPa or more have inherently low ductility of the material, so there is a limit to molding complex-shaped automobile parts. (B) Generally, three steps of bending, preforming and hydroforming are required, and the process becomes relatively complicated. (C) The hydroforming machine is large and relatively expensive. There is.

これらの問題に対して、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2は、この曲げ加工装置0の概略を示す説明図である。
図2に示すように、この発明は、支持手段2によりその軸方向へ移動自在に支持された鋼管1を上流側から下流側へ向けて送り装置3により送りながら、支持手段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を製造する際に、支持手段2の下流で高周波加熱コイル5により鋼管1を部分的に焼入れが可能な温度域に急速に加熱し、高周波加熱コイル5の下流に配置される水冷装置6により鋼管1を急冷するとともに、鋼管1を送りながら支持可能であるロール対4aを少なくとも一組有する可動ローラダイス4の位置を二次元又は三次元で変更して鋼管1の加熱された部分に曲げモーメントを付与して曲げ加工を行うので、十分な曲げ加工精度を確保しながら高い作業能率で屈曲部材を製造することが可能になる。
In response to these problems, the present applicant has previously disclosed an invention relating to a bending apparatus according to Patent Document 1. FIG. 2 is an explanatory view showing an outline of the bending apparatus 0. As shown in FIG.
As shown in FIG. 2, the present invention bends downstream of the support means 2 while feeding the steel pipe 1 supported by the support means 2 so as to be movable in the axial direction from the upstream side to the downstream side by the feeding device 3. When a bending member is manufactured using a bending method for performing processing, the steel pipe 1 is rapidly heated to a temperature range in which the steel pipe 1 can be partially hardened by the high-frequency heating coil 5 downstream of the support means 2, and the high-frequency heating coil 5. The steel pipe 1 is rapidly cooled by a water-cooling device 6 arranged downstream of the pipe, and the position of the movable roller die 4 having at least one pair of roll pairs 4a that can be supported while feeding the steel pipe 1 is changed in two dimensions or three dimensions. Since bending is performed by applying a bending moment to the heated portion of the steel pipe 1, it is possible to manufacture a bending member with high work efficiency while ensuring sufficient bending accuracy.

この発明によれば、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を、十分な曲げ加工精度を確保しながら高い作業能率で、製造することが可能になる。   According to the present invention, the bent portion and the quenched portion that are bent two-dimensionally or three-dimensionally are surely intermittently or continuously directed in the longitudinal direction and / or in the circumferential direction in the plane intersecting the longitudinal direction. It is possible to manufacture the bending member having high working efficiency while ensuring sufficient bending accuracy.

国際公開WO2006/093006号International Publication WO2006 / 093006

自動車技術Nov.57,No.6(2003)23〜28頁Automotive Technology Nov. 57, no. 6 (2003) 23-28

特許文献1により開示された発明によれば、比較的安価な成形機を用いた単純な工程により、例えば780MPa以上といった高強度の自動車部品を一体成形することができ、極めて有益である。   According to the invention disclosed in Patent Document 1, a high-strength automobile part such as 780 MPa or more can be integrally formed by a simple process using a relatively inexpensive molding machine, which is extremely beneficial.

しかしながら、本発明者等はこの発明のさらなる向上を図るべく鋭意検討を重ねたところ、この発明では、鋼管1は部分的に高周波加熱コイル5により焼入れが可能な温度域に急速に加熱されるため、鋼管1の表面には不可避的に酸化スケールが生成し、製造される屈曲部材の外面に酸化スケールが残存する。このため、屈曲部材の表面性状が劣化するとともに、塗装後耐食性も低下するという問題がある。また、鋼管1の外面のみならず内面にも酸化スケールが生成するため、製造される屈曲部材の耐食性の低下は避けられない。   However, the present inventors have made extensive studies to further improve the present invention, and in this invention, the steel pipe 1 is rapidly heated to a temperature range that can be partially quenched by the high-frequency heating coil 5. The oxidized scale is inevitably generated on the surface of the steel pipe 1, and the oxidized scale remains on the outer surface of the bending member to be manufactured. For this reason, there exists a problem that the surface property of a bending member deteriorates and corrosion resistance after coating also falls. In addition, since oxide scale is generated not only on the outer surface of the steel pipe 1 but also on the inner surface, a decrease in the corrosion resistance of the manufactured bending member is inevitable.

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、特許文献1により開示された発明においても実施されるように、鋼材をその長手方向へ送りながら、送られる鋼材を焼入れ可能温度域に加熱した後に冷却して鋼材を焼入れる際に、酸化スケールの発生を抑制もしくは解消することができる、例えば焼入れ鋼管等の焼入れ鋼材の製造方法及び製造装置を提供することである。   This invention is made | formed in view of the subject which such a prior art has, and the steel materials which are sent while feeding steel materials in the longitudinal direction so that it may be implemented also in the invention disclosed by patent document 1. By providing a method and an apparatus for producing a hardened steel material such as a hardened steel pipe, which can suppress or eliminate the generation of oxide scale when the steel material is cooled to a quenchable temperature range and then quenched to quench the steel material. is there.

本発明は、閉じた横断面形状を有する中空の部材である鋼材をその長手方向へ送るための送り装置と、送られる鋼材から離間して第1の位置に配置されて、鋼材を焼入れ可能温度域に加熱する加熱装置と、第1の位置よりも鋼材の送り方向の下流の第2の位置で鋼材に冷却媒体を吹き付けることにより鋼材を焼入れる冷却装置と、鋼材の送り方向の後端部に設置されるとともに鋼材の内部に不活性ガスまたは還元性ガスを供給するための流路を有するチャックと、この流路を介して、鋼材の内部に不活性ガス又は還元性ガスを供給する内部スケール生成防止ガス供給系と、鋼材における、加熱装置により加熱されて、酸化スケールが生成する高温にある部分の周囲の空間に、不活性ガス又は還元性ガスを供給して、この空間に不活性ガス又は還元性ガスを充満させるスケール生成防止ガス供給系と、
第1の位置よりも鋼材の送り方向の上流側に配置されて、スケール生成防止ガス供給系から供給された不活性ガス又は還元性ガスが、加熱された部分の周囲の空間から洩れ出すことを抑制するための漏洩抑制部材と、鋼材の送り方向の先端部に設置され、鋼材の内部に供給された不活性ガスまたは還元性ガスを鋼材の外部へ排出するための流路を有するとともに、チャックとともに高温の部分の両側の部分の位置を適宜制御することにより鋼材を屈曲部材に製造するチャックとを備えることを特徴とする焼入れ鋼材である屈曲部材の製造装置である。
The present invention relates to a feeding device for feeding a steel material, which is a hollow member having a closed cross-sectional shape, in the longitudinal direction thereof, and a temperature at which the steel material can be hardened by being spaced apart from the steel material to be fed and placed at a first position. A heating device for heating the zone, a cooling device for quenching the steel by blowing a cooling medium on the steel at a second position downstream of the first position in the feed direction of the steel, and a rear end portion in the feed direction of the steel And a chuck having a flow path for supplying an inert gas or a reducing gas to the inside of the steel material, and an interior for supplying the inert gas or the reducing gas to the inside of the steel material through the flow path An inert gas or a reducing gas is supplied to the space around the high temperature part that is heated by the heating device in the scale material, and the steel is heated by the heating device, and the space is inert. Gas or And scale formation preventing gas supply system to fill the original gas,
The inert gas or the reducing gas, which is disposed upstream of the first position in the feed direction of the steel material and supplied from the scale generation prevention gas supply system, leaks out of the space around the heated portion. A leakage suppressing member for suppressing and a flow path for discharging an inert gas or a reducing gas supplied to the inside of the steel material to the outside of the steel material, installed at the tip of the steel material feed direction, and a chuck In addition, a bending member manufacturing apparatus, which is a hardened steel material, includes a chuck that manufactures the steel material into a bending member by appropriately controlling the positions of both sides of the high-temperature portion.

本発明によれば、特許文献1により開示された加工法を実施しても、例えば鋼管等の鋼材の酸化スケールの発生を抑制もしくは解消することができるようになる。   According to the present invention, even if the processing method disclosed in Patent Document 1 is carried out, it is possible to suppress or eliminate the occurrence of oxide scale of a steel material such as a steel pipe.

図1は、本発明に係る焼入れ鋼材の製造装置の構成を、模式的に示す説明図である。FIG. 1 is an explanatory view schematically showing the configuration of a hardened steel manufacturing apparatus according to the present invention. 図2は、特許文献1により開示された曲げ加工装置の概略を示す説明図である。FIG. 2 is an explanatory diagram showing an outline of the bending apparatus disclosed in Patent Document 1. As shown in FIG.

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、本発明における鋼材が、閉じた横断面形状を有する中空の部材の代表例である鋼管である場合を例にとるが、本発明は閉じた横断面形状を有する中空の部材に限定されるものではなく、鋼材であれば等しく適用される。   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, a case where the steel material in the present invention is a steel pipe that is a representative example of a hollow member having a closed cross-sectional shape is taken as an example, but the present invention is a hollow tube having a closed cross-sectional shape. The present invention is not limited to members, and is equally applicable to steel materials.

はじめに本発明に係る製造装置を説明する。図1は、本発明に係る焼入れ部材10の製造装置11の構成を、模式的に示す説明図である。
この製造装置11は、送り装置12と、加熱装置13と、冷却装置14と、スケール生成防止ガス供給系15と、漏洩抑制部材16と、内部スケール生成防止ガス供給系17とを備えるので、これらの構成要素を説明する。
First, the manufacturing apparatus according to the present invention will be described. FIG. 1 is an explanatory view schematically showing a configuration of a manufacturing apparatus 11 for a quenching member 10 according to the present invention.
The manufacturing apparatus 11 includes a feeding device 12, a heating device 13, a cooling device 14, a scale generation preventing gas supply system 15, a leakage suppression member 16, and an internal scale generation preventing gas supply system 17. The components of are described.

[送り装置12]
送り装置12は、鋼管10をその長手方向へ送ることができる装置であればよく、特定の装置には限定されない。
[Feeding device 12]
The feeding device 12 may be any device that can feed the steel pipe 10 in its longitudinal direction, and is not limited to a specific device.

図1に示す製造装置11では、送り装置12は、鋼管10の送り方向(図1中の白抜き矢印方向)の後端部に挿入して設置されるチャック18と、このチャック18を鋼管10の送り方向へ移動自在に支持する第1の産業用ロボット(図示しない)と、鋼管10の送り方向(図1中の白抜き矢印方向)の後端部に挿入して設置されるチャック19と、このチャック18を鋼管10の送り方向へ移動自在に支持する第2の産業用ロボット(図示しない)とにより、構成した。   In the manufacturing apparatus 11 shown in FIG. 1, the feeding device 12 includes a chuck 18 that is installed by being inserted into the rear end portion of the feeding direction of the steel pipe 10 (in the direction of the white arrow in FIG. 1), and the chuck 18 that is installed in the steel pipe 10. A first industrial robot (not shown) that is movably supported in the feed direction, and a chuck 19 that is inserted and installed in the rear end of the feed direction of the steel pipe 10 (the direction of the white arrow in FIG. 1); The chuck 18 is constituted by a second industrial robot (not shown) that supports the steel pipe 10 so as to be movable in the feed direction.

第1の産業用ロボット及び第2の産業用ロボットに替えて、二本のマニピュレータを有するいわゆる双腕型の産業用ロボットを用いてもよい。
また、第1の産業用ロボットに替えて、例えばボールネジ等の公知の送り装置を用いてもよい。この場合に屈曲部材を製造するためには、この送り装置と加熱装置13との間の鋼管10を送りながら所定の位置に位置決めするために、一対のローラ等からなる支持装置を配置することが望ましい。
Instead of the first industrial robot and the second industrial robot, a so-called double-arm type industrial robot having two manipulators may be used.
Further, instead of the first industrial robot, a known feeding device such as a ball screw may be used. In this case, in order to manufacture the bending member, a support device composed of a pair of rollers or the like may be disposed in order to position the steel pipe 10 between the feeding device and the heating device 13 at a predetermined position while feeding it. desirable.

チャック18及び19それぞれの内部には、不活性ガス又は還元性ガスの流路18a,19aが設けられており、鋼管10の内部に不活性ガス又は還元性ガスを供給するとともに供給した不活性ガス又は還元性ガスを鋼管10の外部へ排出することができるように構成されている。   Each of the chucks 18 and 19 is provided with inert gas or reducing gas flow paths 18a and 19a. The inert gas or reducing gas is supplied into the steel pipe 10 and supplied. Alternatively, the reducing gas is configured to be discharged to the outside of the steel pipe 10.

送り装置12は、以上のように構成される。
[加熱装置13]
加熱装置13は、送られる鋼管10から所定の距離だけ離間して、鋼管10の送り方向に関する第1の位置Aに配置されて、鋼管10を焼入れ可能温度域に加熱するための装置である。
The feeding device 12 is configured as described above.
[Heating device 13]
The heating device 13 is a device for heating the steel pipe 10 to a quenchable temperature range by being spaced apart from the steel pipe 10 to be sent by a predetermined distance and disposed at a first position A in the feed direction of the steel pipe 10.

加熱装置13は、鋼管10を、例えば鋼管10のAc点以上の温度に急速に加熱する能力を有することが望ましく、この製造装置11では加熱装置10として高周波加熱装置を用いた。 The heating device 13 desirably has the ability to rapidly heat the steel pipe 10 to, for example, a temperature equal to or higher than the Ac 3 point of the steel pipe 10. In the manufacturing apparatus 11, a high-frequency heating apparatus is used as the heating apparatus 10.

加熱装置13は、後述する冷却装置14と一体として、図示しない第3の産業用ロボットにより移動自在に支持される。
加熱装置13は、以上のように構成される。
The heating device 13 is movably supported by a third industrial robot (not shown) as a unit with a cooling device 14 described later.
The heating device 13 is configured as described above.

[冷却装置14]
冷却装置14は、第1の位置Aよりも鋼管10の送り方向の下流の第2の位置Bで鋼管に冷却媒体20(例えば冷却水)を吹き付けることにより、例えばAc点以上の温度に加熱された鋼管10を急速に冷却することによって、鋼管10を焼入れるための装置である。
[Cooling device 14]
The cooling device 14 is heated to a temperature of, for example, Ac 3 points or more by spraying a cooling medium 20 (for example, cooling water) onto the steel pipe at a second position B downstream of the first position A in the feed direction of the steel pipe 10. It is an apparatus for quenching the steel pipe 10 by rapidly cooling the formed steel pipe 10.

冷却装置14は、上述したように加熱装置13と一体として、図示しない第3の産業用ロボットにより移動自在に支持される。
冷却装置14は、以上のように構成される。
As described above, the cooling device 14 is integrally supported with the heating device 13 and is movably supported by a third industrial robot (not shown).
The cooling device 14 is configured as described above.

[スケール生成防止ガス供給系15]
スケール生成防止ガス供給系15は、供給ポンプ15aと、この供給ポンプ15aに接続される供給ノズル15bとを有しており、鋼管10における、加熱装置13により加熱されて、酸化スケールが生成する高温にある部分21の周囲の空間22に不活性ガス又は還元性ガスを供給して、この空間22に不活性ガス又は還元性ガスを滞留、充満させるためのものである。
[Scale generation prevention gas supply system 15]
The scale generation preventing gas supply system 15 includes a supply pump 15a and a supply nozzle 15b connected to the supply pump 15a, and is heated by the heating device 13 in the steel pipe 10 to generate an oxide scale. The inert gas or the reducing gas is supplied to the space 22 around the portion 21 in the above, and the inert gas or the reducing gas is retained and filled in the space 22.

供給ノズル15bの設置位置や向き、設置数、さらには、供給ノズル15bからの不活性ガス又は還元性ガスの吹き付け力等は、空間22に不活性ガス又は還元性ガスを供給して、この空間22に不活性ガス又は還元性ガスを滞留、充満させることができるように、適宜決定すればよい。   The installation position and orientation of the supply nozzle 15b, the number of installations, and the blowing force of the inert gas or reducing gas from the supply nozzle 15b are supplied to the space 22 by supplying the inert gas or reducing gas. What is necessary is just to determine suitably so that 22 can make an inert gas or a reducing gas retain and fill.

供給ノズル15bも、上述したように加熱装置13及び冷却装置14と一体として、図示しない第3の産業用ロボットにより移動自在に支持される。
スケール生成防止ガス供給系15は、以上のように構成される。
As described above, the supply nozzle 15b is also integrally supported with the heating device 13 and the cooling device 14, and is movably supported by a third industrial robot (not shown).
The scale generation preventing gas supply system 15 is configured as described above.

[漏洩抑制部材16]
漏洩抑制部材16は、第1の位置Aよりも鋼管10の送り方向の上流側に配置されて、不活性ガス又は還元性ガスが、加熱された部分21の周囲の空間22から洩れ出すことを抑制するための部材であり、例えばじゃま板を用いることができる。
[Leakage suppressing member 16]
The leakage suppression member 16 is disposed upstream of the first position A in the feed direction of the steel pipe 10 so that the inert gas or reducing gas leaks from the space 22 around the heated portion 21. For example, a baffle plate can be used.

漏洩抑制部材16も、上述したように加熱装置13、冷却装置14及び供給ノズル15bと一体として、図示しない第3の産業用ロボットにより移動自在に支持される。
漏洩抑制部材16は、以上のように構成される。
As described above, the leakage suppressing member 16 is also movably supported by the third industrial robot (not shown) as one unit with the heating device 13, the cooling device 14, and the supply nozzle 15b.
The leakage suppression member 16 is configured as described above.

[内部スケール生成防止ガス供給系17]
内部スケール生成防止ガス供給系17は、チャック18の内部に形成された不活性ガス又は還元性ガスの流路18aを介して、鋼管10の内部に不活性ガス又は還元性ガスを供給するためのものである。
[Internal scale formation prevention gas supply system 17]
The internal scale generation preventing gas supply system 17 is for supplying an inert gas or a reducing gas to the inside of the steel pipe 10 through an inert gas or reducing gas flow path 18 a formed inside the chuck 18. Is.

内部スケール生成防止ガス供給系17により鋼管10の内部に供給された不活性ガス又は還元性ガスは、鋼管10の内部に充満し、チャック19の内部に形成された不活性ガス又は還元性ガスの流路19aを介して、鋼管10の外部へ排出される。   The inert gas or reducing gas supplied to the inside of the steel pipe 10 by the internal scale formation prevention gas supply system 17 fills the inside of the steel pipe 10, and the inert gas or reducing gas formed inside the chuck 19. It is discharged to the outside of the steel pipe 10 through the flow path 19a.

内部スケール生成防止ガス供給系17は、以上のように構成される。
本発明に係る製造装置11は、以上のように構成される。次に、この製造装置11により、焼入れ鋼管を製造する状況を説明する。
The internal scale generation preventing gas supply system 17 is configured as described above.
The manufacturing apparatus 11 according to the present invention is configured as described above. Next, a situation where a hardened steel pipe is manufactured by the manufacturing apparatus 11 will be described.

送り装置12により、鋼管10をその長手方向(図1における白抜き矢印方向)へ送りながら、送られる鋼管10を加熱装置13により例えばAc点以上の焼入れ可能温度域に急速に加熱する。 While feeding the steel pipe 10 in the longitudinal direction (the direction of the white arrow in FIG. 1) by the feeding device 12, the steel pipe 10 to be fed is rapidly heated by the heating device 13 to a quenchable temperature range of, for example, Ac 3 points or more.

次に、冷却装置14により鋼管10の外面に冷却水を吹き付けることにより鋼管10を急速に冷却して鋼管10を焼入れる。
この際に、スケール生成防止ガス供給系15により、鋼管10における、加熱装置13により加熱された部分21の周囲の空間22に不活性ガス又は還元性ガスを、第1の位置Aから第2の位置Bへ向かう側に向けて供給することにより、この空間22に不活性ガス又は還元性ガスを充満させる。
Next, the steel pipe 10 is rapidly cooled by quenching the steel pipe 10 by blowing cooling water onto the outer surface of the steel pipe 10 by the cooling device 14.
At this time, the inert gas or the reducing gas is supplied from the first position A to the second space 22 around the portion 21 of the steel pipe 10 heated by the heating device 13 by the scale generation preventing gas supply system 15. By supplying toward the side toward the position B, the space 22 is filled with an inert gas or a reducing gas.

これにより、鋼管10を例えばAc点以上の焼入れ可能温度域から急速に冷却することができるとともに、鋼管10における、加熱装置13により加熱された部分21に、その周囲の空間から酸素が供給されることを阻止することができるので、この部分21におけるスケールの形成を、抑制もしくは解消することができるようになる。 Accordingly, the steel pipe 10 can be rapidly cooled from a quenchable temperature range of, for example, Ac 3 points or more, and oxygen is supplied to the portion 21 of the steel pipe 10 heated by the heating device 13 from the surrounding space. Since this can be prevented, the formation of scale in the portion 21 can be suppressed or eliminated.

さらに、この焼入れの際には、内部スケール生成防止ガス供給系17により、鋼管10の内部に不活性ガス又は還元性ガスを供給することにより、鋼管10の内面におけるスケールの形成をも、抑制もしくは解消することができるようになる。   Furthermore, during this quenching, by supplying an inert gas or a reducing gas to the inside of the steel pipe 10 by the internal scale formation preventing gas supply system 17, the formation of scale on the inner surface of the steel pipe 10 is also suppressed or Can be resolved.

この製造装置11を用いて屈曲部材を製造するには、第1の産業用ロボットにより支持されるチャック18の位置と、第2の産業用ロボットにより支持されるチャック19の位置と、第3の産業用ロボットにより一体に支持される加熱装置13、冷却装置14、供給ノズル15b及び漏洩抑制部材16の位置とを、三次元で連動させて制御すればよい。すなわち、加熱装置13により加熱されて変形抵抗が大幅に低下した部分21の両側の部分の位置を適宜制御することにより、所望の形状を有する屈曲部材を製造することができる。   In order to manufacture the bending member using the manufacturing apparatus 11, the position of the chuck 18 supported by the first industrial robot, the position of the chuck 19 supported by the second industrial robot, The positions of the heating device 13, the cooling device 14, the supply nozzle 15b, and the leakage suppressing member 16 that are integrally supported by the industrial robot may be controlled in a three-dimensional manner. That is, a bending member having a desired shape can be manufactured by appropriately controlling the positions of the portions on both sides of the portion 21 where the deformation resistance is greatly reduced by being heated by the heating device 13.

なお、第1の産業用ロボットに替えて、例えばボールネジ等の公知の送り装置を用いる場合には、上述したように、この送り装置と加熱装置13との間に、鋼管10を送りながら所定の位置に位置決めするための一対のローラ等からなる支持装置が配置されているので、第2の産業用ロボットにより支持されるチャック19の位置と、必要に応じて第3の産業用ロボットにより一体に支持される加熱装置13、冷却装置14、供給ノズル15b及び漏洩抑制部材16の位置とを、三次元で連動させて制御すればよい。   In addition, when using well-known feeders, such as a ball screw, for example instead of the 1st industrial robot, as mentioned above, while sending the steel pipe 10 between this feeder and the heating apparatus 13, it is predetermined. Since a support device composed of a pair of rollers or the like for positioning is arranged, the position of the chuck 19 supported by the second industrial robot is integrated with the third industrial robot as necessary. What is necessary is just to control the position of the heating apparatus 13, the cooling apparatus 14, the supply nozzle 15b, and the leakage suppression member 16 to be supported in three dimensions.

このようにして、本発明により、焼入れ鋼管、さらには所定の屈曲形状を有する焼入れ鋼管である屈曲部材を、製造することができる。
この本発明により製造される屈曲部材は、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。
In this way, according to the present invention, a bent member that is a hardened steel pipe and further a hardened steel pipe having a predetermined bent shape can be manufactured.
The bending member manufactured according to the present invention is applicable to, for example, uses (i) to (vii) exemplified below.

(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)バンパー、ドアインパクトビーム、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
(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 bumpers, door impact beams, side members, suspension mount members, pillars, side sills,
(Iv) Frames for bicycles and motorcycles, cranks (v) Reinforcing members for vehicles such as trains, cart parts (cart frames, various beams, etc.)
(Vi) Frame parts such as hulls, reinforcing members,
(Vii) Home appliance strength member, reinforcing member or structural member

10 焼入れ部材
11 本発明に係る製造装置
12 送り装置
13 加熱装置
14 冷却装置
15 スケール生成防止ガス供給系
15a 供給ポンプ
15b 供給ノズル
16 漏洩抑制部材
17 内部スケール生成防止ガス供給系
18 チャック
18a 流路
19 チャック
19a 流路
20 冷却媒体
21 部分
22 周囲の空間
A 第1の位置
B 第2の位置
DESCRIPTION OF SYMBOLS 10 Hardening member 11 Manufacturing apparatus 12 Feed apparatus 13 Heating apparatus 14 Cooling apparatus 15 Scale production | generation prevention gas supply system 15a Supply pump 15b Supply nozzle 16 Leakage suppression member 17 Internal scale production | generation prevention gas supply system 18 Chuck 18a Flow path 19 Chuck 19a Flow path 20 Cooling medium 21 Part 22 Surrounding space A First position B Second position

Claims (1)

閉じた横断面形状を有する中空の部材である鋼材をその長手方向へ送るための送り装置と、
送られる鋼材から離間して第1の位置に配置されて、前記鋼材を焼入れ可能温度域に加熱する加熱装置と、
前記第1の位置よりも前記鋼材の送り方向の下流の第2の位置で前記鋼材に冷却媒体を吹き付けることにより該鋼材を焼入れる冷却装置と、
前記鋼材の送り方向の後端部に設置されるとともに前記鋼材の内部に不活性ガスまたは還元性ガスを供給するための流路を有するチャックと、
前記流路を介して、前記鋼材の内部に不活性ガス又は還元性ガスを供給する内部スケール生成防止ガス供給系と、
前記鋼材における、前記加熱装置により加熱されて、酸化スケールが生成する高温にある部分の周囲の空間に、不活性ガス又は還元性ガスを供給して、該空間に不活性ガス又は還元性ガスを充満させるスケール生成防止ガス供給系と、
前記第1の位置よりも前記鋼材の送り方向の上流側に配置されて、前記スケール生成防止ガス供給系から供給された前記不活性ガス又は前記還元性ガスが、前記加熱された部分の周囲の空間から洩れ出すことを抑制するための漏洩抑制部材と、
前記鋼材の送り方向の先端部に設置され、前記鋼材の内部に供給された前記不活性ガスまたは還元性ガスを前記鋼材の外部へ排出するための流路を有するとともに、前記チャックとともに前記高温の部分の両側の部分の位置を適宜制御することにより前記鋼材を屈曲部材に製造するチャックと
を備えることを特徴とする焼入れ鋼材である屈曲部材の製造装置。
A feeding device for feeding a steel material, which is a hollow member having a closed cross-sectional shape, in the longitudinal direction;
A heating device disposed at a first position apart from the steel material to be sent, and heating the steel material to a quenchable temperature range;
A cooling device for quenching the steel material by spraying a cooling medium on the steel material at a second position downstream of the first position in the feed direction of the steel material;
A chuck installed at a rear end of the steel material in the feed direction and having a flow path for supplying an inert gas or a reducing gas into the steel material;
An internal scale generation preventing gas supply system for supplying an inert gas or a reducing gas into the steel material through the flow path;
In the steel material, an inert gas or a reducing gas is supplied to a space around a portion at a high temperature that is heated by the heating device and generates an oxide scale, and the inert gas or the reducing gas is supplied to the space. A scale generation prevention gas supply system to be filled;
The inert gas or the reducing gas, which is disposed upstream of the first position in the feed direction of the steel material and supplied from the scale generation prevention gas supply system, is around the heated portion. A leakage suppressing member for suppressing leakage from the space;
It is installed at the tip of the steel material in the feed direction, and has a flow path for discharging the inert gas or reducing gas supplied to the inside of the steel material to the outside of the steel material, and the high temperature together with the chuck An apparatus for manufacturing a bending member, which is a hardened steel material, comprising: a chuck that manufactures the steel material as a bending member by appropriately controlling the positions of the portions on both sides of the portion.
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