JP2018119170A - Method and apparatus for quenching - Google Patents

Method and apparatus for quenching Download PDF

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JP2018119170A
JP2018119170A JP2017009513A JP2017009513A JP2018119170A JP 2018119170 A JP2018119170 A JP 2018119170A JP 2017009513 A JP2017009513 A JP 2017009513A JP 2017009513 A JP2017009513 A JP 2017009513A JP 2018119170 A JP2018119170 A JP 2018119170A
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quenching
cooling
workpiece
heating
chamber
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JP6785672B2 (en
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賢治 川手
Kenji Kawate
賢治 川手
照雄 小池
Teruo Koike
照雄 小池
祐貴 佐藤
Suketaka Sato
祐貴 佐藤
隆輝 岡田
Takateru Okada
隆輝 岡田
卓哉 岩田
Takuya Iwata
卓哉 岩田
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Daido Plant Industries Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a quenching apparatus and a quenching method for heating a long workpiece so as not to form oxide scale on a surface thereof and uniformly cooling the heated workpiece without fire.SOLUTION: An apparatus for quenching a long workpiece by heating and cooling during transportation, comprises: a heating chamber 11; a cooling chamber 21; transporting rollers 31 having a plurality of V-shaped grooves formed on a circumferential surface thereof and being obliquely displaced from a direction orthogonal to the transporting direction of the workpiece; a heating source; an air supply system 51; a cooling nozzle 61 provided between the transporting rollers in the cooling chamber; and a liquid supply system 62 for supplying an aqueous solution for quenching. While being transported and rotated, a long workpiece placed on the grooves of the plurality of transporting rollers 31 is heated to a predetermined temperature in an oxygen-free gas atmosphere in the heating chamber 11. The workpiece is subsequently quenched by injecting an aqueous solution onto a peripheral surface thereof from the cooling nozzle 61 in the cooling chamber 21.SELECTED DRAWING: Figure 1

Description

本発明は焼入れ装置及び焼入れ方法に関し、更に詳しくは長尺のワークを搬送しながら加熱して冷却することにより焼入れする焼入れ装置の改良及びかかる改良された焼入れ装置を用いる焼入れ方法に関する。   The present invention relates to a quenching apparatus and a quenching method, and more particularly, to an improvement of a quenching apparatus that quenches by heating and cooling a long workpiece while being conveyed and a quenching method using the improved quenching apparatus.

従来、長尺のワークを搬送しながら加熱して冷却することにより焼入れする焼入れ装置として、高周波でワークを加熱するもの（例えば特許文献１参照）、流動床でワークを加熱するもの（例えば特許文献２参照）、周面にＶ字形の溝部を形成したローラでワークを搬送することにより該ワークに自転を与えながらワークを加熱するもの（例えば特許文献３参照）等が知られている。しかし、これらの従来装置には、ワークの加熱を大気雰囲気下で行なうため、ワークの表面に酸化スケールが生成し、焼入れ後にかかる酸化スケールを取除く作業が必要になるという問題があり、また加熱したワークの冷却を水や油で行なうため、水で行なう場合には焼入れが不均一になり易く、油で行なう場合には火災の危険が伴うという問題がある。   2. Description of the Related Art Conventionally, as a quenching device that quenches by heating and cooling while conveying a long workpiece, one that heats the workpiece at a high frequency (for example, see Patent Document 1), one that heats a workpiece in a fluidized bed (for example, Patent Document) 2), and the like, in which a work is conveyed by a roller having a V-shaped groove formed on its peripheral surface to heat the work while rotating the work (see, for example, Patent Document 3). However, these conventional devices have a problem that since the workpiece is heated in an air atmosphere, an oxide scale is generated on the surface of the workpiece, and it is necessary to remove the oxide scale after quenching. Since the workpiece is cooled with water or oil, quenching tends to be uneven when using water, and there is a risk of fire hazard when using oil.

特開２０００−２６５２１３号公報JP 2000-265213 A 特開２０１０−２４５１２号公報JP 2010-24512 A 実開昭６３−１５５９９６号公報Japanese Utility Model Publication No. 63-155996

本発明が解決しようとする課題は、長尺のワークに自転を与えた状態で搬送しながら加熱して冷却することにより焼入れする焼入れ装置であって、ワークの加熱をその表面に酸化スケールが生成しないように行ない、また加熱したワークの冷却を火災の危険を伴うことなく油で行なった場合と同様に均一に行なうことができる焼入れ装置及びかかる焼入れ装置を用いる焼入れ方法を提供する処にある。   The problem to be solved by the present invention is a quenching apparatus for quenching by heating and cooling while conveying a long workpiece in a state of rotation, and an oxide scale is generated on the surface of the workpiece by heating. The present invention provides a quenching apparatus and a quenching method using such a quenching apparatus, which can be performed uniformly as in the case where the heated workpiece is cooled with oil without risk of fire.

前記の課題を解決する本発明は、長尺のワークを搬送しながら加熱して冷却することにより焼入れする焼入れ装置において、加熱室と、加熱室の下流側に離間して接続された冷却室と、加熱室及び冷却室に渡って敷設された複数の搬送用ローラであって、周面に所定間隔で複数のＶ字形の溝部が形成され且つワークの搬送方向と直交する方向から斜めにずれた水平方向で装置枠体に装架された搬送用ローラと、加熱室に装備された加熱源と、加熱室に接続された加熱室に無酸素ガスを供給する給気系と、冷却室の搬送用ローラ間にて搬送用ローラにより搬送されるワークを中央に囲んで装備された冷却用ノズルと、冷却用ノズルに焼入れ用の水溶液を供給する給液系とを備え、長尺のワークを複数の搬送用ローラの溝部に載せた状態で回転させつつ搬送しながら、加熱室にて無酸素ガス雰囲気下で所定の温度に加熱した後、冷却室にて冷却用ノズルからワークの周面に水溶液を噴射して焼入れするようにして成ることを特徴とする焼入れ装置に係る。また本発明はかかる焼入れ装置を用いる焼入れ方法に係る。   The present invention that solves the above-mentioned problems is a quenching apparatus that performs quenching by heating and cooling while conveying a long workpiece, and includes a heating chamber and a cooling chamber that is connected to the downstream side of the heating chamber so as to be spaced apart from each other. A plurality of conveying rollers laid across the heating chamber and the cooling chamber, wherein a plurality of V-shaped groove portions are formed at predetermined intervals on the peripheral surface and are obliquely deviated from a direction perpendicular to the workpiece conveying direction. A transfer roller mounted on the apparatus frame in the horizontal direction, a heating source equipped in the heating chamber, an air supply system for supplying oxygen-free gas to the heating chamber connected to the heating chamber, and a cooling chamber transfer A cooling nozzle equipped with a work piece conveyed by a conveying roller between the rollers, and a liquid supply system for supplying an aqueous solution for quenching to the cooling nozzle. Rotate while placed in the groove of the transport roller. While being transported while being heated to a predetermined temperature in an oxygen-free gas atmosphere in a heating chamber, the aqueous solution is jetted from the cooling nozzle to the peripheral surface of the workpiece in the cooling chamber and quenched. It relates to a quenching apparatus. The present invention also relates to a quenching method using such a quenching apparatus.

本発明に係る焼入れ装置は、長尺のワークを搬送しながら加熱して冷却することにより焼入れする焼入れ装置である。本発明に係る焼入れ装置は、加熱室と、加熱室の下流側に離間して接続された冷却室と、加熱室及び冷却室に渡って敷設された複数の搬送用ローラとを備えている。搬送用ローラは、その周面に所定間隔で複数のＶ字形の溝部が形成されており、ワークの搬送方向と直交する方向から斜めにずれた水平方向で装置枠体に装架されている。かかる搬送用ローラは、加熱室の入口を臨むワークの装入部及び冷却室の出口を臨むワークの抽出部にも同様に敷設されている。   The quenching apparatus according to the present invention is a quenching apparatus that quenches by heating and cooling while conveying a long workpiece. The quenching apparatus according to the present invention includes a heating chamber, a cooling chamber that is connected to be separated from the downstream side of the heating chamber, and a plurality of transfer rollers that are laid across the heating chamber and the cooling chamber. A plurality of V-shaped grooves are formed at predetermined intervals on the peripheral surface of the conveying roller, and the conveying roller is mounted on the apparatus frame body in a horizontal direction obliquely deviated from a direction orthogonal to the workpiece conveying direction. The conveying roller is also laid in the work loading portion facing the inlet of the heating chamber and the workpiece extracting portion facing the cooling chamber outlet.

加熱室は、装置枠体（炉殻）と装置枠体に内張りされた耐火材とで構成されており、また冷却室は装置枠体（炉殻）で構成されている。加熱室の入口側の壁面には複数の入口が開設されており、加熱室の出口側の壁面にも複数の出口が開設されている。同様に、冷却室の入口側の壁面には複数の入口が開設されており、冷却室の出口側の壁面にも複数の出口が開設されている。加熱室の入口の数、出口の数、冷却室の入口の数及び出口の数は、加熱室及び冷却室に渡って敷設された搬送用ローラの周面に形成されているＶ字形の溝部の数と対応している。   The heating chamber is composed of an apparatus frame (furnace shell) and a refractory material lined on the apparatus frame, and the cooling chamber is composed of an apparatus frame (furnace shell). A plurality of inlets are opened on the wall surface on the inlet side of the heating chamber, and a plurality of outlets are also opened on the wall surface on the outlet side of the heating chamber. Similarly, a plurality of inlets are opened on the wall surface on the inlet side of the cooling chamber, and a plurality of outlets are also opened on the wall surface on the outlet side of the cooling chamber. The number of inlets of the heating chamber, the number of outlets, the number of inlets of the cooling chamber, and the number of outlets are the number of V-shaped grooves formed on the peripheral surface of the transfer roller laid over the heating chamber and the cooling chamber. Corresponds with the number.

加熱室には、ラジアントチューブやヒータ等の加熱源が装備されており、給気系が接続されている。給気系は通常、開度調節弁を備える不活性ガスや発熱形ガス等の無酸素ガスの供給源へと接続されている。冷却室には、冷却室の搬送用ローラ間にて搬送用ローラにより搬送されるワークを中央に囲んで冷却用ノズルが装備されており、冷却用ノズルには給液系が接続されている。給液系は通常、開度調節弁を備える給液ポンプを介して焼入れ用の水溶液の供給源へと接続されている。かかる焼入れ用の水溶液は通常、ポリビニルアルコール、ポリエチレングリコール、ポリアクリロニトリル等の水溶性ポリマーを溶解した水溶液であり、水よりも粘性があり、冷却能が小さいため、水との混合比率によってワークの焼入硬度及び焼入深さの調整が可能である。   The heating chamber is equipped with a heating source such as a radiant tube or a heater, and an air supply system is connected to the heating chamber. The air supply system is usually connected to a supply source of oxygen-free gas such as an inert gas or a heat generating gas provided with an opening degree adjusting valve. The cooling chamber is equipped with a cooling nozzle that surrounds the work conveyed by the conveying roller between the conveying rollers of the cooling chamber in the center, and a liquid supply system is connected to the cooling nozzle. The liquid supply system is usually connected to a supply source of an aqueous solution for quenching via a liquid supply pump having an opening degree adjusting valve. Such an aqueous solution for quenching is usually an aqueous solution in which a water-soluble polymer such as polyvinyl alcohol, polyethylene glycol, polyacrylonitrile or the like is dissolved, is more viscous than water, and has a lower cooling capacity. The hardness and quenching depth can be adjusted.

本発明に係る焼入れ装置は、長尺のワークを複数の搬送用ローラの溝部に載せた状態で回転させつつ搬送しながら、言い替えればワークに自転を与えつつ搬送しながら、加熱室にて無酸素ガス雰囲気下で所定の温度に加熱した後、冷却室にて冷却用ノズルからワークの周面に水溶液を噴射して冷却することにより焼入れするようになっている。   The quenching apparatus according to the present invention is an oxygen-free in a heating chamber while conveying a long workpiece while rotating it in a state of being placed on the grooves of a plurality of conveying rollers, in other words, conveying while rotating the workpiece. After heating to a predetermined temperature in a gas atmosphere, quenching is performed by injecting an aqueous solution onto the peripheral surface of the workpiece from a cooling nozzle in the cooling chamber and cooling.

本発明に係る焼入れ装置において、搬送用ローラの周面に形成されているＶ字形の溝部は、ワークを噛み込むことなく、またワークが溝部から飛び出すこともなく、ワークに傷を付けないで相応の自転を与えられる限り、そのＶ字形に開いた角度が特に制限されるというものではないが、これらをより円滑に達成するために、Ｖ字形に開いた角度は６０〜１２０度とするのが好ましい。同様に、搬送用ローラの装置枠体への装架は、ワークの進行方向と直交する方向から１０〜２０度斜めにずれた水平方向とするのが好ましい。   In the quenching apparatus according to the present invention, the V-shaped groove formed on the peripheral surface of the conveying roller is suitable without biting the workpiece, without protruding the workpiece from the groove, and without scratching the workpiece. As long as the rotation of the V-shape is given, the angle opened to the V-shape is not particularly limited, but in order to achieve these smoothly, the angle opened to the V-shape should be 60 to 120 degrees. preferable. Similarly, it is preferable that the carrying roller is mounted on the apparatus frame in a horizontal direction that is obliquely inclined by 10 to 20 degrees from the direction orthogonal to the moving direction of the workpiece.

また本発明に係る焼入れ装置において、搬送用ローラは中空の水冷構造とすることもできるが、このようにすると加熱室における熱損失が大きくなるので、中実構造又は軽量性も考慮して単なる中空構造とするのが好ましい。この場合、相応に負荷が加わる搬送用ローラの両端部におけるスタブシャフトは、その熱変形を防止するため、中空の水冷構造とするのが好ましく、またこれに代えて又はこれと共に、搬送用ローラの両端部におけるスタブシャフトを装置枠体に回転自在に支持する軸受の支持金物も、軸受の熱変形を防止するため、中空の水冷構造とするのが好ましい。   Further, in the quenching apparatus according to the present invention, the conveying roller may have a hollow water-cooled structure. However, since heat loss in the heating chamber is increased in this way, the solid roller or the light weight is also taken into consideration. A structure is preferable. In this case, it is preferable that the stub shafts at both ends of the conveying roller to which a load is applied correspondingly have a hollow water-cooled structure in order to prevent thermal deformation thereof. It is preferable that the support metal of the bearing that rotatably supports the stub shafts at both end portions on the apparatus frame also has a hollow water cooling structure in order to prevent thermal deformation of the bearing.

更に本発明に係る焼入れ装置において、冷却室の搬送用ローラ間に装備された冷却用ノズルは、搬送用ローラにより搬送されるワークを中央に囲んでその周面に焼入れ用の水溶液を噴射するものであれば、その形状や構造に特に制限はないが、中空リング形とし、その内側に中央を指向する複数のノズル孔を有するもの又はワークの上下左右にノズルを配したものが好ましい。またかかる冷却用ノズルは、加熱したワークの冷却を制御し易くするため、搬送用ローラにより搬送されるワークを中央に囲んでワークの搬送方向に複数装備するのが好ましい。   Further, in the quenching apparatus according to the present invention, the cooling nozzle provided between the conveyance rollers in the cooling chamber surrounds the workpiece conveyed by the conveyance roller in the center and injects a quenching aqueous solution onto the peripheral surface thereof. If it is, the shape and structure are not particularly limited, but a hollow ring shape having a plurality of nozzle holes directed to the center inside or a nozzle arranged on the top, bottom, left and right of the workpiece is preferable. In order to make it easier to control the cooling of the heated workpiece, it is preferable that a plurality of such cooling nozzles are provided in the workpiece conveyance direction so as to surround the workpiece conveyed by the conveyance roller in the center.

次に本発明に係る焼入れ方法について説明する。本発明に係る焼入れ方法は、以上説明した本発明に係る焼入れ装置を用いる焼入れ方法であって、下記の１）〜４）から選ばれる少なくとも一つの方法により焼入れ性能を制御することを特徴とする焼入れ方法。
１）冷却ノズルに供給する焼入れ用の水溶液の供給量を調節する方法。
２）冷却ノズルに供給する焼入れ用の水溶液の温度を調節する方法。
３）冷却ノズルに供給する焼入れ用の水溶液の濃度を調節する方法。
４）焼入れ用の水溶液を供給する冷却ノズルの数を調節する方法。 Next, the quenching method according to the present invention will be described. The quenching method according to the present invention is a quenching method using the quenching apparatus according to the present invention described above, wherein the quenching performance is controlled by at least one method selected from the following 1) to 4). Quenching method.
1) A method of adjusting the amount of aqueous solution for quenching supplied to the cooling nozzle.
2) A method of adjusting the temperature of the aqueous solution for quenching supplied to the cooling nozzle.
3) A method of adjusting the concentration of the aqueous solution for quenching supplied to the cooling nozzle.
4) A method of adjusting the number of cooling nozzles for supplying an aqueous solution for quenching.

本発明によると、ワークの加熱を長尺のワークに自転を与えた状態で搬送しながら無酸素ガス雰囲気で行なうため、その表面に酸化スケールが生成しないように行なうことができ、またかくして加熱したワークの冷却をワークの周面に焼入れ用の水溶液を噴射して行なうため、火災の危険を伴うことなく油で行なった場合と同様に均一に行なうことができる。   According to the present invention, since the workpiece is heated in a non-oxygen gas atmosphere while being conveyed in a state in which a long workpiece is rotated, it is possible to prevent the oxide scale from being generated on the surface, and thus heating is performed. Since the workpiece is cooled by injecting a quenching aqueous solution onto the peripheral surface of the workpiece, it can be uniformly performed as in the case of using oil without risk of fire.

本発明に係る焼入れ装置をワークの搬送方向に沿う一部縦断面で略示する全体図。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a general view schematically showing a quenching apparatus according to the present invention in a partial longitudinal section along a workpiece conveyance direction. 図１と同じ焼入れ装置における搬送用ローラの敷設状態を一部横断面で拡大して示す平面図。FIG. 2 is a plan view showing a partially expanded cross-sectional view of a laying state of a conveying roller in the same quenching apparatus as in FIG. 1. 図１及び図２と同じ焼入れ装置における搬送用ローラを搬送用ローラの軸心に沿う縦断面で拡大して示す図。The figure which expands and shows the conveyance roller in the hardening apparatus same as FIG.1 and FIG.2 with the longitudinal cross-section in alignment with the axial center of the roller for conveyance. 図１〜図３と同じ焼入れ装置における搬送用ローラの片端部を搬送用ローラの軸心に沿う縦断面で拡大して示す図。The figure which expands and shows the one end part of the roller for conveyance in the same hardening apparatus as FIGS. 1-3 in the longitudinal cross-section in alignment with the axial center of the roller for conveyance. 図１〜図４と同じ焼入れ装置における冷却用ノズルを拡大して示す正面図。The front view which expands and shows the nozzle for cooling in the same hardening apparatus as FIGS.

図１〜図３において、本発明に係る焼入れ装置は、加熱室１１と、加熱室１１の下流側に離間して接続された冷却室２１と、加熱室１１及び冷却室２１に渡って敷設された複数の搬送用ローラ３１とを備えている。搬送用ローラ３１は、その周面に所定間隔で複数のＶ字形の溝部３２が形成されており、ワークの搬送方向Ｃと直交する方向Ｄから斜めにずれた水平方向で装置枠体４１，４２に装架されている。かかる搬送用ローラ３１は、加熱室１１の入口を臨むワークの装入部１２及び冷却室２１の出口を臨むワークの抽出部２２にも同様に敷設されている。   1 to 3, the quenching apparatus according to the present invention is laid across the heating chamber 11, the cooling chamber 21 that is connected to the downstream side of the heating chamber 11, and the heating chamber 11 and the cooling chamber 21. And a plurality of conveying rollers 31. The conveying roller 31 has a plurality of V-shaped groove portions 32 formed at predetermined intervals on the peripheral surface thereof, and the apparatus frame bodies 41 and 42 in a horizontal direction obliquely shifted from a direction D perpendicular to the workpiece conveying direction C. It is mounted on. The transfer roller 31 is similarly laid on the workpiece loading section 12 facing the inlet of the heating chamber 11 and the workpiece extraction section 22 facing the outlet of the cooling chamber 21.

加熱室１１は、装置枠体（炉殻）４１と装置枠体４１に内張りされた耐火材４３とで構成されており、また冷却室２１は装置枠体（炉殻）４２で構成されている。加熱室１１の入口側の壁面には開口面積を減らして雰囲気ガス消費量を低減するために５個のほぼ円形の入口１３が開設されており、加熱室１１の出口側の壁面にも５個のほぼ円形の出口１４が開設されている。同様に、冷却室２１の入口側の壁面にも５個のほぼ円形の入口２３が開設されており、冷却室２１の出口側の壁面にも５個のほぼ円形の出口２４が開設されているが、冷却ノズルからの水溶液の飛散が問題ない場合には特にかかる構造に制限されるというものではない。加熱室１１の入口１３の数、出口１４の数、冷却室２１の入口２３の数及び出口２４の数は、加熱室１１及び冷却室２１に渡って敷設された搬送用ローラ３１の周面に形成されているＶ字形の溝部３２の数と対応している。   The heating chamber 11 includes an apparatus frame (furnace shell) 41 and a refractory material 43 lined on the apparatus frame 41, and the cooling chamber 21 includes an apparatus frame (furnace shell) 42. . Five substantially circular inlets 13 are provided on the wall surface on the inlet side of the heating chamber 11 in order to reduce the opening area and reduce the atmospheric gas consumption, and five on the wall surface on the outlet side of the heating chamber 11. A substantially circular exit 14 is opened. Similarly, five substantially circular inlets 23 are opened on the wall surface on the inlet side of the cooling chamber 21, and five substantially circular outlets 24 are also opened on the wall surface on the outlet side of the cooling chamber 21. However, the structure is not particularly limited in the case where there is no problem with scattering of the aqueous solution from the cooling nozzle. The number of the inlets 13 of the heating chamber 11, the number of the outlets 14, the number of the inlets 23 of the cooling chamber 21, and the number of the outlets 24 are on the peripheral surface of the transfer roller 31 laid across the heating chamber 11 and the cooling chamber 21. This corresponds to the number of V-shaped grooves 32 formed.

加熱室１１には、図示しない加熱源が装備されており、給気系５１が接続されている。給気系５１は、開度調節弁を備える給気ファン５２を介して無酸素ガスの供給源５３へと接続されている。冷却室２１には、冷却室２１の搬送用ローラ３１間にて搬送用ローラ３１により搬送されるワークを中央に囲んで冷却用ノズル６１が装備されており、冷却用ノズル６１には給液系６２が接続されている。給液系６２は、開度調節弁を備える給液ポンプ６３を介して焼入れ用の水溶液の供給源６４へと接続されている。   The heating chamber 11 is equipped with a heating source (not shown), and an air supply system 51 is connected to the heating chamber 11. The air supply system 51 is connected to an oxygen-free gas supply source 53 via an air supply fan 52 having an opening degree adjusting valve. The cooling chamber 21 is provided with a cooling nozzle 61 that surrounds the work conveyed by the conveying roller 31 between the conveying rollers 31 of the cooling chamber 21 in the center, and the cooling nozzle 61 includes a liquid supply system. 62 is connected. The liquid supply system 62 is connected to a supply source 64 of an aqueous solution for quenching via a liquid supply pump 63 having an opening degree adjusting valve.

図１〜図３において、本発明に係る焼入れ装置は、長尺のワーク、例えば丸棒を複数の搬送用ローラ３１の溝部３２に載せた状態で回転させつつ搬送しながら、言い替えればワークに自転を与えつつ搬送しながら、加熱室１１にて無酸素ガス雰囲気下で所定の温度に加熱した後、冷却室２１にて冷却用ノズル６１からワークの周面に水溶液を噴射して冷却することにより焼入れするようになっている。   1 to 3, the quenching apparatus according to the present invention rotates a long work, for example, a round bar while rotating it while it is placed on the grooves 32 of a plurality of transport rollers 31. By heating to a predetermined temperature in an oxygen-free gas atmosphere in the heating chamber 11 while conveying the substrate, and then injecting an aqueous solution from the cooling nozzle 61 onto the peripheral surface of the workpiece in the cooling chamber 21 for cooling. It is designed to be hardened.

図３において、搬送用ローラ３１の周面に形成されているＶ字形の溝部３２は、そのＶ字形に開いた角度Ａが８０度となっている。また図２において、搬送用ローラ３１の装置枠体４１への装架は、ワークの進行方向Ｃと水平に直交する方向Ｄから斜めに水平方向にずれた角度Ｂが１５度となっている。   In FIG. 3, the V-shaped groove portion 32 formed on the peripheral surface of the conveying roller 31 has an angle A opened to the V-shape of 80 degrees. In FIG. 2, the mounting of the transport roller 31 on the apparatus frame 41 has an angle B of 15 degrees that is obliquely displaced in the horizontal direction from a direction D that is orthogonal to the moving direction C of the workpiece.

図３及び図４において、搬送用ローラ３１は単なる中空構造となっているが、その両端部におけるスタブシャフト３３も中空構造になっており、その中央部に軸線方向からノズル３４が挿入されていて、ノズル３４から中空部に冷却水を供給して冷却する水冷構造となっている。また搬送用ローラ３１の両端部におけるスタブシャフト３３を装置枠体４１に回転自在に支持する軸受３５の支持金物３６にもリング状の中空部が形成され、この中空部に冷却水を供給して冷却する水冷構造となっている。尚、図４では搬送用ローラ３１の片端部のみを示しているが、他の片端部も同様の構成になっている。   3 and 4, the transport roller 31 has a simple hollow structure, but the stub shafts 33 at both ends thereof also have a hollow structure, and a nozzle 34 is inserted in the center from the axial direction. In addition, a cooling structure is provided in which cooling water is supplied from the nozzle 34 to the hollow portion for cooling. In addition, a ring-shaped hollow portion is also formed in the support metal 36 of the bearing 35 that rotatably supports the stub shaft 33 at both ends of the conveyance roller 31 on the apparatus frame body 41, and cooling water is supplied to the hollow portion. It has a water cooling structure for cooling. In FIG. 4, only one end portion of the conveying roller 31 is shown, but the other one end portion has the same configuration.

図１及び図５において、冷却室２１の搬送用ローラ３１間に装備された冷却用ノズル６１は、搬送用ローラ３１により搬送されるワークを中央に囲んで中空リング形となっており、その内側に中央を指向する合計８個のノズル孔６２を有していて、冷却用ノズル６１のノズル孔６２から中央のワークに向かって焼入れ用の水溶液を噴射するようになっている。図１において、かかる冷却用ノズル６１は、搬送用ローラ３１により搬送されるワーク１本当たり、搬送用ローラ３１間においてワークの搬送方向に合計３個装備されている。   1 and 5, the cooling nozzle 61 provided between the conveying rollers 31 in the cooling chamber 21 has a hollow ring shape surrounding the work conveyed by the conveying roller 31 in the center, A total of eight nozzle holes 62 directed to the center are provided, and a quenching aqueous solution is sprayed from the nozzle holes 62 of the cooling nozzle 61 toward the center workpiece. In FIG. 1, a total of three such cooling nozzles 61 are provided in the workpiece conveyance direction between the conveyance rollers 31 for each workpiece conveyed by the conveyance roller 31.

図１〜図５に示した焼入れ装置を用いて焼入れするとき、本発明では下記の１）〜４）から選ばれる少なくとも一つの方法により焼入れ性能を制御する。
１）冷却ノズル６１に供給する焼入れ用の水溶液の供給量を調節する方法。
２）冷却ノズル６１に供給する焼入れ用の水溶液の温度を調節する方法。
３）冷却ノズル６１に供給する焼入れ用の水溶液の濃度を調節する方法。
４）焼入れ用の水溶液を供給する冷却ノズル６１の数を調節する方法。 When quenching using the quenching apparatus shown in FIGS. 1 to 5, the quenching performance is controlled by at least one method selected from the following 1) to 4) in the present invention.
1) A method of adjusting the amount of aqueous solution for quenching supplied to the cooling nozzle 61.
2) A method of adjusting the temperature of the aqueous solution for quenching supplied to the cooling nozzle 61.
3) A method of adjusting the concentration of the quenching aqueous solution supplied to the cooling nozzle 61.
4) A method of adjusting the number of cooling nozzles 61 for supplying an aqueous solution for quenching.

１１ 加熱室
１２ 装入部
２１ 冷却室
２２ 抽出部
３１ 搬送用ローラ
３２ 溝部
３３ スタブシャフト
３５ 軸受
３６ 支持金物
４１，４２ 装置枠体
４３ 耐火材
５１ 給気系
５２ 給気ファン
５３ 無酸素ガスの供給源
６１ 冷却用ノズル
６３ 給液ポンプ
６４ 水溶液の供給源 DESCRIPTION OF SYMBOLS 11 Heating chamber 12 Insertion part 21 Cooling chamber 22 Extraction part 31 Transfer roller 32 Groove part 33 Stub shaft 35 Bearing 36 Support metal | hardware 41,42 Apparatus frame 43 Refractory material 51 Supply system 52 Supply fan 53 Supply of oxygen-free gas Source 61 Cooling nozzle 63 Supply pump 64 Supply source of aqueous solution

Claims (8)

長尺のワークを搬送しながら加熱して冷却することにより焼入れする焼入れ装置において、加熱室と、加熱室の下流側に離間して接続された冷却室と、加熱室及び冷却室に渡って敷設された複数の搬送用ローラであって、周面に所定間隔で複数のＶ字形の溝部が形成され且つワークの搬送方向と直交する方向から斜めにずれた水平方向で装置枠体に装架された搬送用ローラと、加熱室に装備された加熱源と、加熱室に接続された加熱室に無酸素ガスを供給する給気系と、冷却室の搬送用ローラ間にて搬送用ローラにより搬送されるワークを中央に囲んで装備された冷却用ノズルと、冷却用ノズルに焼入れ用の水溶液を供給する給液系とを備え、長尺のワークを複数の搬送用ローラの溝部に載せた状態で回転させつつ搬送しながら、加熱室にて無酸素ガス雰囲気下で所定の温度に加熱した後、冷却室にて冷却用ノズルからワークの周面に水溶液を噴射して焼入れするようにして成ることを特徴とする焼入れ装置。   In a quenching device that quenches by heating and cooling while conveying a long workpiece, laying across the heating chamber, the cooling chamber connected to the downstream side of the heating chamber, and the heating chamber and the cooling chamber A plurality of V-shaped grooves formed at predetermined intervals on the circumferential surface and mounted on the apparatus frame in a horizontal direction obliquely shifted from a direction perpendicular to the workpiece conveying direction. Transported by a transport roller between a transport roller, a heating source provided in the heating chamber, an air supply system for supplying oxygen-free gas to the heating chamber connected to the heating chamber, and a transport roller in the cooling chamber With a cooling nozzle equipped around the center of the workpiece to be mounted and a liquid supply system for supplying a quenching aqueous solution to the cooling nozzle, with a long workpiece placed in the grooves of a plurality of transfer rollers In the heating chamber while transporting while rotating in After heating to a predetermined temperature in an oxygen gas atmosphere, quenching device, characterized in that the cooling nozzle to inject solution into the peripheral surface of the workpiece made so as to quenching in a cooling chamber. 搬送用ローラが、周面にＶ字形に開いた角度が６０〜１２０度のＶ字形の溝部が形成されたものである請求項１記載の焼入れ装置。   The quenching apparatus according to claim 1, wherein the conveying roller is formed with a V-shaped groove portion having an opening angle of 60 to 120 degrees on the circumferential surface. 搬送用ローラが、ワークの搬送方向と水平に直交する方向から１０〜２０度斜めにずれた水平方向に装架されたものである請求項１又は２記載の焼入れ装置。   The quenching apparatus according to claim 1 or 2, wherein the conveying roller is mounted in a horizontal direction obliquely shifted by 10 to 20 degrees from a direction orthogonal to the horizontal direction of the workpiece. 搬送用ローラの両端部におけるスタブシャフトが中空の水冷構造とされたものである請求項１〜３のいずれか一つの項記載の焼入れ装置。   The quenching apparatus according to any one of claims 1 to 3, wherein the stub shafts at both ends of the conveying roller have a hollow water cooling structure. 搬送用ローラの両端部におけるスタブシャフトを装置枠体に回転自在に支持する軸受の支持金物が中空の水冷構造とされたものである請求項１〜４のいずれか一つの項記載の焼入れ装置。   The quenching apparatus according to any one of claims 1 to 4, wherein a support metal fitting for the bearing that rotatably supports the stub shafts at both ends of the conveying roller on the apparatus frame has a hollow water cooling structure. 冷却用ノズルが中空リング形のものである請求項１〜５のいずれか一つの項記載の焼入れ装置。   The quenching apparatus according to any one of claims 1 to 5, wherein the cooling nozzle is of a hollow ring type. 冷却用ノズルが搬送用ローラにより搬送されるワークを中央に囲んでワークの搬送方向に複数装備された請求項１〜６のいずれか一つの項記載の焼入れ装置。   The quenching apparatus according to any one of claims 1 to 6, wherein a plurality of cooling nozzles are provided in the workpiece conveying direction so as to surround a workpiece conveyed by the conveying roller in the center. 請求項１〜７のいずれか一つの項記載の焼入れ装置を用いる焼入れ方法であって、下記の１）〜４）から選ばれる少なくとも一つの方法により焼入れ性能を制御することを特徴とする焼入れ方法。
１）冷却ノズルに供給する焼入れ用の水溶液の供給量を調節する方法。
２）冷却ノズルに供給する焼入れ用の水溶液の温度を調節する方法。
３）冷却ノズルに供給する焼入れ用の水溶液の濃度を調節する方法。
４）焼入れ用の水溶液を供給する冷却ノズルの数を調節する方法。 A quenching method using the quenching apparatus according to claim 1, wherein quenching performance is controlled by at least one method selected from the following 1) to 4): .
1) A method of adjusting the amount of aqueous solution for quenching supplied to the cooling nozzle.
2) A method of adjusting the temperature of the aqueous solution for quenching supplied to the cooling nozzle.
3) A method of adjusting the concentration of the aqueous solution for quenching supplied to the cooling nozzle.
4) A method of adjusting the number of cooling nozzles for supplying an aqueous solution for quenching.
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