JP2007131901A - Continuous production line for mechanical component having annular piece built in - Google Patents

Continuous production line for mechanical component having annular piece built in Download PDF

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JP2007131901A
JP2007131901A JP2005325378A JP2005325378A JP2007131901A JP 2007131901 A JP2007131901 A JP 2007131901A JP 2005325378 A JP2005325378 A JP 2005325378A JP 2005325378 A JP2005325378 A JP 2005325378A JP 2007131901 A JP2007131901 A JP 2007131901A
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ring
shaped product
chamber
production line
preheating
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Shiki Sakamoto
史希 坂本
Hiroyuki Itakura
博之 板倉
Kunio Kamo
邦男 賀茂
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NTN Corp
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NTN Toyo Bearing Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

Abstract

<P>PROBLEM TO BE SOLVED: To provide a continuous production line which can continuously produce a mechanical component such as a rolling bearing that is assembled from a quenched annular piece and other parts, uniformizes a quenched quality in each part of the annular piece, does not upsize a facility and does not increase an installation area. <P>SOLUTION: The production line has an inspection section 11, a forging section 12, a turning section 13, a punching section 14, a heat treatment section 15, a grinding section 16 and an assembly section 17 sequentially arranged therein. The heat treatment section 15 includes: a preheating section 15a for heating the annular piece W1 to a predetermined preheating temperature which is close to a quenching temperature, by induction heating; a soaking section 15b for heating the annular piece W1 to the quenching temperature in a continuous heating furnace 21; a quenching section 15c; and a tempering section 15d. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、転がり軸受等のように、焼入れされたリング状品と他の部品とを組み立てた機械部品であるリング状品組込機械部品を生産するリング状品組込機械部品の連続生産ラインに関する。   The present invention is a continuous production line for ring-shaped product-embedded machine parts that produces ring-shaped product-embedded machine parts, such as rolling bearings, which are machine parts assembled from a quenched ring-shaped product and other parts. About.

各種の量産品となる機械部品の生産において、工程間のワーク搬送の合理化による生産の効率化や、工場床面積の削減等のために、主要構成要素の生産から機械部品の組み立てまでを、ワークを一列で搬送しながら加工を進める連続生産ラインとすることが図られている。
しかし、転がり軸受等のように、焼入れ処理されたリング状品を有する機械部品では、熱処理をバッチ処理としており、連続生産ラインの実現が妨げられている。
In the production of various mass-produced machine parts, from the production of main components to the assembly of machine parts in order to improve production efficiency by rationalizing the transfer of workpieces between processes and reduce the factory floor area, It is intended to be a continuous production line in which processing is carried out while conveying a single line.
However, in a machine part having a ring-shaped product that has been quenched, such as a rolling bearing, heat treatment is performed as a batch process, which hinders the realization of a continuous production line.

転がり軸受の内外輪等の軌道輪は、機械特性の向上のために、内部まで硬化させる焼入が施される。このような内部まで硬化させる焼入では、バッチ式の雰囲気炉で全体焼入をすることが一般的である。連続加熱炉の採用も可能ではあるが、軌道輪の深部まで、室温から焼入温度まで加熱するには、搬送経路が長くなって設備が大型化し、設置面積が大きくなる。そのためバッチ式炉が採用される。また、上記連続加熱炉およびバッチ式炉のいずれにおいても、周辺への熱の影響があり、軌道輪を旋削や研削するラインから離して設置することが必要となる。
なお、車輪用軸受等のように、軌道面のみに局部的に焼入を施す場合は、高周波焼入が採用されている。また、全体焼入する高周波焼入においても、加熱コイル内でコンベヤにより被加熱材を搬送し、連続的に焼入するものが提案されている(例えば特許文献1)。
特開平6−325864号公報
In order to improve mechanical characteristics, the races such as the inner and outer rings of the rolling bearing are hardened to be hardened to the inside. In such quenching that cures to the inside, it is common to perform quenching in a batch type atmospheric furnace. Although it is possible to employ a continuous heating furnace, in order to heat from the room temperature to the quenching temperature up to the deep part of the raceway, the conveying path becomes longer, the equipment becomes larger, and the installation area becomes larger. Therefore, a batch type furnace is adopted. In both the continuous heating furnace and the batch type furnace, there is an influence of heat on the periphery, and it is necessary to install the raceway away from the line for turning and grinding.
In addition, when quenching only on the raceway surface, such as a wheel bearing, induction hardening is employed. Moreover, also in the induction hardening which carries out the whole hardening, what conveys a to-be-heated material with a conveyor within a heating coil, and quenches continuously is proposed (for example, patent document 1).
JP-A-6-325864

転がり軸受の生産ラインを連続生産ラインとするために、軌道輪を高周波焼入することを考えた。高周波焼入であると、ワークを1個ずつ連続して加熱することが可能であり、周辺への熱的影響も少なく、軌道輪の生産から軸受の組立までの連続生産ライン化が可能である。高周波焼入は、エネルギ効率の面でも優れている。
しかし、高周波焼入では、ワーク形状によっては、全体を均一に加熱することが難しい場合がある。そのため、ワーク全体における焼入品質の均一化が難しい。
In order to make the rolling bearing production line a continuous production line, it was considered to induction-harden the race rings. With induction hardening, it is possible to continuously heat workpieces one by one, and there is little thermal influence on the surroundings, enabling a continuous production line from production of bearing rings to assembly of bearings. . Induction hardening is also excellent in terms of energy efficiency.
However, in induction hardening, depending on the workpiece shape, it may be difficult to uniformly heat the whole. Therefore, it is difficult to make the quenching quality uniform throughout the workpiece.

この発明の目的は、焼入れされたリング状品と他の部品とを組み立てた機械部品であるリング状品組込機械部品を連続して生産でき、またリング状品の各部における焼入品質の均一化が図れ、かつ設備の小型化や設置面積の縮小が図れるリング状品組込機械部品の連続生産ラインを提供することである。   An object of the present invention is to continuously produce ring-shaped product-embedded mechanical parts, which are mechanical parts obtained by assembling a quenched ring-shaped product and other parts, and to ensure uniform quenching quality in each part of the ring-shaped product. It is possible to provide a continuous production line for machine parts with ring-like products that can be reduced in size and reduced in equipment size and installation area.

この発明のリング状品組込機械部品の連続生産ラインは、焼入れされたリング状品と他の部品とを組み立てた機械部品であるリング状品組込機械部品を連続して生産する生産ラインであって、
リング状品に加工するための材料を検査する検査工程部と、前記材料をリング状品の完成品の概略形状に旋削する旋削工程部と、この旋削されたリング状品に刻印を施す刻印工程部と、この刻印の施されたリング状品を熱処理する熱処理工程部と、この熱処理されたリング状品に研削を施す研削工程部と、研削の完了したリング状品を他の部品と共にリング状品組込機械部品に組み立てる組立工程部とを備え、
前記熱処理工程部が、リング状品を焼入れ温度に近い所定の予熱温度まで誘導加熱により加熱する予熱工程部と、この予熱工程部で加熱されたリング状品を焼入れ温度まで連続加熱炉で加熱する均熱工程部と、この均熱工程部で加熱されたリング状品を冷却する焼入工程部とを含むことを特徴とする。
The continuous production line of ring-shaped product built-in machine parts of the present invention is a production line for continuously producing ring-shaped product built-in machine parts, which are machine parts assembled from quenched ring-shaped products and other parts. There,
An inspection process section for inspecting a material to be processed into a ring-shaped product, a turning process section for turning the material into a rough shape of a finished product of the ring-shaped product, and a marking process for stamping the turned ring-shaped product A heat treatment process part for heat-treating the ring-shaped product with the engraving, a grinding process part for grinding the heat-treated ring-shaped product, and the ring-shaped product that has been ground together with other parts in a ring shape. An assembly process section for assembling the product assembly machine parts,
The heat treatment process section heats the ring-shaped product to a predetermined preheating temperature close to the quenching temperature by induction heating, and heats the ring-shaped product heated in the preheating process section to the quenching temperature in a continuous heating furnace. It includes a soaking step and a quenching step that cools the ring-shaped product heated in the soaking step.

この構成の生産ラインによると、熱処理工程部が、誘導加熱により加熱する予熱工程部と、連続加熱炉で加熱する均熱工程部とを備えるため、誘導加熱によりリング状品の深部までエネルギ効率良く短時間で加熱することが可能である。また、連続加熱炉によりリング状品の全体の均熱化が図れる。そのため、焼入温度まで誘導加熱する場合に比べて焼入品質に優れたものとできる。連続加熱炉を用いるが、連続加熱炉は焼入温度近くまで予熱されたリング状品を焼入温度まで昇温させるだけであるため、室温から加熱するものと異なり、加熱時間が大幅に短縮されて、炉内でリング状品を移動させる経路が短くて済み、設備が小型化できる。また、連続加熱炉による加熱は僅かであるため、周辺への熱の影響が少なく、周辺環境が改善される。このため、連続加熱炉を、旋削工程部や刻印工程部,研削工程部等を含む連続生産ラインに組み込みながら、これら各工程部への連続加熱炉による熱的影響が回避でき、リング状品の検査工程部からリング状品組込機械部品の組立工程部までの連続生産ラインが実現できる。このように連続生産ライン化したことにより、生産の効率化や、工場床面積の削減、多品種少量生産への適応性向上にも貢献することができる。   According to the production line having this configuration, the heat treatment process section includes a preheating process section that is heated by induction heating and a soaking process section that is heated by a continuous heating furnace, so that the heat treatment process section is energy efficient up to the deep part of the ring-shaped product by induction heating. Heating in a short time is possible. In addition, the entire heating of the ring-shaped product can be achieved by the continuous heating furnace. Therefore, compared with the case where induction heating is performed up to the quenching temperature, the quenching quality can be improved. A continuous heating furnace is used, but the continuous heating furnace only raises the temperature of the ring-shaped product preheated to near the quenching temperature to the quenching temperature. Thus, the path for moving the ring-shaped product in the furnace is short, and the equipment can be downsized. Moreover, since the heating by a continuous heating furnace is slight, there is little influence of the heat to the periphery and the surrounding environment is improved. For this reason, while incorporating a continuous heating furnace into a continuous production line including a turning process section, a stamping process section, a grinding process section, etc., the thermal effects of the continuous heating furnace on each of these process sections can be avoided, and A continuous production line from the inspection process part to the assembly process part of the ring-shaped product embedded machine part can be realized. Such a continuous production line can contribute to improving production efficiency, reducing the factory floor area, and improving adaptability to high-mix low-volume production.

この発明において、前記予熱工程部は、リング状品を大気中から装入する装入室と、この装入室から移動させたリング状品を誘導加熱する予熱室と、この予熱室のリング状品を前記連続加熱炉に移送する移送室とを有し、前記リング状品をそれぞれ通過させる前記装填室の入口、前記装入室と予熱室との間の通路、前記予熱室と移送室との間の通路、および移送室と前記連続加熱炉との間の通路に開閉扉を有し、前記装入室、予熱室、および移送室を、真空、または無酸化雰囲気、または連続加熱炉の雰囲気と同等の雰囲気に変換する雰囲気変換手段を有し、かつ前記リング状品を前記装入室に装入する装入手段、前記装入室から予熱室に移動させる第1移動手段、前記加熱室から移送室に移動させる第2移動手段、および移送室から連続加熱炉に移送する移送手段を有するものであっても良い。 このように雰囲気変換手段を設け、リング状品を、真空、または無酸化雰囲気、または連続加熱炉の雰囲気と同等の雰囲気の中で連続装入、加熱、移送を行うようにした場合、リング状品の無酸化の連続処理が容易になる。また、加熱後に連続加熱炉の雰囲気に合わせて移送室から連続加熱炉に移送するようにした場合は、浸炭雰囲気の連続加熱炉にも対応することができる。   In the present invention, the preheating process section includes a charging chamber for charging the ring-shaped product from the atmosphere, a preheating chamber for induction heating the ring-shaped product moved from the charging chamber, and a ring-like shape of the preheating chamber. A transfer chamber for transferring the product to the continuous heating furnace, an entrance of the loading chamber through which the ring-shaped product passes, a passage between the charging chamber and the preheating chamber, the preheating chamber and the transfer chamber, And an opening / closing door in the passage between the transfer chamber and the continuous heating furnace, and the charging chamber, the preheating chamber, and the transfer chamber are in a vacuum, a non-oxidizing atmosphere, or a continuous heating furnace. An atmosphere converting means for converting the atmosphere into an atmosphere equivalent to the atmosphere; a charging means for charging the ring-shaped article into the charging chamber; a first moving means for moving the charging chamber from the charging chamber to the preheating chamber; Second moving means for moving from the chamber to the transfer chamber, and continuous addition from the transfer chamber. Be one having a transfer means for transferring to the furnace may be. In this way, when the atmosphere converting means is provided and the ring-shaped product is continuously charged, heated, and transferred in a vacuum, a non-oxidizing atmosphere, or an atmosphere equivalent to the atmosphere of a continuous heating furnace, The non-oxidizing continuous processing of the product becomes easy. Moreover, when it is made to transfer from a transfer chamber to a continuous heating furnace according to the atmosphere of a continuous heating furnace after a heating, it can respond also to the continuous heating furnace of a carburizing atmosphere.

この発明において、前記リング状品組込機械部品が転がり軸受であり、前記リング状品が転がり軸受の軌道輪であっても良い。
転がり軸受は生産性が要求され、その軌道輪は品質の良い焼入処理が要求されるため、この発明における熱処理工程部を、誘導加熱により加熱する予熱工程部と、連続加熱炉で加熱する均熱工程部とを有するものしたことによる生産性向上および焼入品質向上の利点が効果的に発揮される。
In this invention, the ring-shaped product built-in machine part may be a rolling bearing, and the ring-shaped product may be a raceway of a rolling bearing.
Rolling bearings are required to be productive, and the bearing rings are required to be subjected to a high-quality quenching process. Advantages of improving productivity and quenching quality due to having the thermal process part are effectively exhibited.

リング状品組込機械部品が転がり軸受である場合に、前記検査工程部、旋削工程部、刻印工程部、熱処理工程部、および研削工程部によりそれぞれ構成される組立前生産ライン部分が2本設けられ、これら2本の組立前生産ライン部分は、前記リング状品として、転がり軸受における内輪および外輪をそれぞれ生産するものであり、前記組立工程部は、前記2本の組立前生産ライン部分でそれぞれ生産された内輪と外輪とを他の部品と共に転がり軸受に組み立てるものであっても良い。
このように内輪,外輪とも、その生産を行う組立前生産ライン部分を連続生産ラインとすることで、転がり軸受をより一層効率良く生産することができる。
Two pre-assembly production line parts each comprising the inspection process part, turning process part, engraving process part, heat treatment process part, and grinding process part are provided when the ring-shaped product built-in machine part is a rolling bearing. These two pre-assembly production line parts are for producing the inner ring and the outer ring of the rolling bearing as the ring-shaped products, respectively, and the assembly process part is the two pre-assembly production line parts, respectively. The produced inner ring and outer ring may be assembled together with other parts into a rolling bearing.
In this way, the rolling bearing can be more efficiently produced by making the pre-assembly production line part for producing both the inner ring and the outer ring a continuous production line.

この発明のリング状品組込機械部品の連続生産ラインは、焼入れされたリング状品と他の部品とを組み立てた機械部品であるリング状品組込機械部品を連続して生産する生産ラインであって、リング状品に加工するための材料を検査する検査工程部と、前記材料をリング状品の完成品の概略形状に旋削する旋削工程部と、この旋削されたリング状品に刻印を施す刻印工程部と、この刻印の施されたリング状品を熱処理する熱処理工程部と、この熱処理されたリング状品に研削を施す研削工程部と、研削の完了したリング状品を他の部品と共にリング状品組込機械部品に組み立てる組立工程部とを備え、前記熱処理工程部が、リング状品を焼入れ温度に近い所定の予熱温度まで誘導加熱により加熱する予熱工程部と、この予熱工程部で加熱されたリング状品を焼入れ温度まで連続加熱炉で加熱する均熱工程部と、この均熱工程部で加熱されたリング状品を冷却する焼入工程部とを含むため、リング状品組込機械部品を連続して生産でき、またリング状品の各部における焼入品質の均一化が図れ、かつ設備の小型化や設置面積の縮小が図れるという効果が得られる。   The continuous production line of ring-shaped product built-in machine parts of the present invention is a production line for continuously producing ring-shaped product built-in machine parts, which are machine parts assembled from quenched ring-shaped products and other parts. An inspection process unit for inspecting a material to be processed into a ring-shaped product, a turning process unit for turning the material into a rough shape of a finished product of the ring-shaped product, and a stamp on the turned ring-shaped product. A stamping process section to be applied, a heat treatment process section for heat-treating the ring-shaped article with this stamp, a grinding process section for grinding the heat-treated ring-shaped article, and a ring-shaped article that has been ground to other parts And an assembly process unit for assembling the ring-shaped product-embedded machine part, and the heat treatment process unit heats the ring-shaped product to a predetermined preheating temperature close to the quenching temperature by induction heating, and this preheating process unit Heated by Since it includes a soaking process section that heats the ring-shaped product up to the quenching temperature in a continuous heating furnace and a quenching process section that cools the ring-shaped product heated in this soaking process section, it is a machine part that incorporates a ring-shaped product Can be produced continuously, the quenching quality in each part of the ring-shaped product can be made uniform, and the equipment can be downsized and the installation area can be reduced.

この発明の一実施形態を図1ないし図7と共に説明する。図1は、この連続生産ラインの概念構成を示す。この連続生産ラインは、リング状品組込機械部品である転がり軸受1を連続して生産するラインであり、軸受外輪となるリング状品W1の生産から、転がり軸受1の組立までを行うラインである。生産される転がり軸受1は、軸受外輪となるリング状品W1と、軸受内輪となるリング状品W2と、複数の転動体2と、保持器3とで構成される。図示の例では、転がり軸受1は深溝玉軸受からなるが、ころ軸受であっても良く、またスラスト型の軸受であっても良い。   An embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a conceptual configuration of this continuous production line. This continuous production line is a line for continuously producing the rolling bearing 1 which is a ring-shaped product built-in machine part, and is a line from production of the ring-shaped product W1 as the bearing outer ring to assembly of the rolling bearing 1. is there. The produced rolling bearing 1 includes a ring-shaped product W1 serving as a bearing outer ring, a ring-shaped product W2 serving as a bearing inner ring, a plurality of rolling elements 2, and a cage 3. In the illustrated example, the rolling bearing 1 is a deep groove ball bearing, but it may be a roller bearing or a thrust type bearing.

この生産ラインは、材料検査工程部11、鍛造工程部12、旋削工程部13、刻印工程部14、熱処理工程部15、研削工程部16、および組立工程部17を備える。各工程部11〜17間には、材料またはリング状品W1を搬送するコンベヤなど搬送手段20が設けられ、生産ラインの全体を通してリング状品W1は1列の縦列に搬送される。   This production line includes a material inspection process section 11, a forging process section 12, a turning process section 13, a marking process section 14, a heat treatment process section 15, a grinding process section 16, and an assembly process section 17. Between each process part 11-17, conveying means 20, such as a conveyor which conveys material or the ring-shaped product W1, is provided, and the ring-shaped product W1 is conveyed in one column in the whole production line.

検査工程部11は、リング状品W1に加工するための材料(図示せず)を検査する工程部であり、ここでは、塊状、板状、またはパイプ状等の材料を購入先等から受入れ、材料ロット毎の検査を行う。この検査は、作業者による手作業により行うようにしても、自動的に行うようにしても良い。検査の完了した材料は、リング状品W1の1個分毎に分け、鍛造工程部12に送る。   The inspection process unit 11 is a process unit that inspects a material (not shown) for processing into the ring-shaped product W1, and here, accepts a material such as a lump, plate, or pipe from a supplier, Inspect each material lot. This inspection may be performed manually by an operator or automatically. The material that has been inspected is divided into one for each ring-shaped article W1 and sent to the forging process section 12.

鍛造工程部12は、1個分の材料を、リング状品W1の完成品の粗形状に鍛造機で鍛造する工程部である。
旋削工程部13は、鍛造されたリング状品W1を、鍛造された形状よりも完成品により近い概略形状に、旋盤により旋削する工程部である。リング状品W1が軸受外輪等の軌道輪である場合、軌道溝の溝加工を旋削工程部13で行う。
なお、転がり軸受1の種類によっては、鍛造工程12を省き、旋削工程部13でパイプ材等の材料から概略形状のリング状品W1を得るようにしても良い。その場合、材料からリング状品W1の1個分ずつの切り出しも旋削工程部13で行うようにしても良い。
The forging process part 12 is a process part which forges one material with the forging machine into the rough shape of the finished product of the ring-shaped product W1.
The turning process unit 13 is a process unit that turns the forged ring-shaped product W1 into a schematic shape closer to the finished product than the forged shape by a lathe. When the ring-shaped product W1 is a bearing ring such as a bearing outer ring, the turning process section 13 performs the groove processing of the raceway groove.
Depending on the type of the rolling bearing 1, the forging process 12 may be omitted, and the turning process unit 13 may obtain the ring-shaped product W <b> 1 having a substantially shape from a material such as a pipe material. In that case, the turning process unit 13 may also cut out the ring-shaped product W1 one by one from the material.

刻印工程部14は、旋削されたリング状品W1に、社名や型番等のマークMを刻印機(図示せず)により刻印する工程部である。リング状品W1が軸受外輪または軸受内輪の場合、刻印はリング状品W1の幅面に行う。   The stamping process unit 14 is a process unit that stamps a mark M such as a company name or a model number on the turned ring-shaped product W1 using a stamping machine (not shown). When the ring-shaped product W1 is a bearing outer ring or a bearing inner ring, the marking is performed on the width surface of the ring-shaped product W1.

熱処理工程部15は、刻印の施されたリング状品W1に、焼入等の熱処理を施す工程部である。熱処理工程部15については、後に詳しく説明する。   The heat treatment process part 15 is a process part which heat-processes quenching etc. to the ring-shaped article W1 to which the stamp was given. The heat treatment process unit 15 will be described in detail later.

研削工程部16は、熱処理されたリング状品W1に研削を施し、リング状品W1の完成品とする工程部である。
研削工程部16は、リング状品W1が軸受外輪の場合、複数の工程部、例えば幅研削工程部16a、外径研削工程部16b、溝研削工程部16c、および溝超仕上げ工程部16dからなるものとされる。各研削構成部16a〜16dは、それぞれの研削を行う研削装置(図示せず)を備える。リング状品が軸受内輪である場合も、研削工程部16は、軸受外輪の場合と同様に、4つの工程部からなるものとされる。
The grinding process part 16 is a process part which grinds the heat-treated ring-shaped product W1 to obtain a finished product of the ring-shaped product W1.
When the ring-shaped product W1 is a bearing outer ring, the grinding process unit 16 includes a plurality of process units, for example, a width grinding process unit 16a, an outer diameter grinding process unit 16b, a groove grinding process unit 16c, and a groove superfinishing process unit 16d. It is supposed to be. Each of the grinding components 16a to 16d includes a grinding device (not shown) that performs respective grinding. Even when the ring-shaped product is a bearing inner ring, the grinding process section 16 is composed of four process sections as in the case of the bearing outer ring.

上記検査工程部11から研削工程部16までの工程部により、組立前生産ライン部分R1が構成される。   The process parts from the inspection process part 11 to the grinding process part 16 constitute a pre-assembly production line part R1.

組立工程部17は、研削の完了したリング状品W1を他の部品と共にリング状品組込機械部品に組み立てる工程部である。この実施形態では、リング状品組込機械部品は転がり軸受1であり、軸受外輪となるリング状品W1を、他の部品である軸受内輪となるリング状品W2と、転動体2と、保持器3と共に、転がり軸受1に組み立てる。この組立は、自動組立機(図示せず)により行われる。保持器3は、図示の例では、2つの保持器部品3aを組み合わせるものとされている。   The assembly process unit 17 is a process unit that assembles the ring-shaped product W1 that has been ground together with other components into a ring-shaped product assembly machine part. In this embodiment, the ring-shaped product built-in machine part is a rolling bearing 1, and a ring-shaped product W1 that is a bearing outer ring, a ring-shaped product W2 that is a bearing inner ring, which is another part, a rolling element 2, and a holding member. The rolling bearing 1 is assembled together with the device 3. This assembly is performed by an automatic assembly machine (not shown). In the illustrated example, the cage 3 is a combination of two cage components 3a.

軸受内輪となるリング状品W2は、軸受外輪の組立前生産ライン部分R1とは別の組立前生産ライン部分R2により生産され、組立工程部17に搬入される。転動体2および保持器3は、それぞれ転動体保管部18および保持器保管部19から組立工程部17に搬入される。
転動体保管部18および保持器保管部19は、それぞれ、この連続生産ラインとは別の場所で生産された転動体2および保持器3を購入先等から受け入れ、検査等の処理を行って保管する工程部である。転動体保管部18および保持器保管部19は、この連続生産ラインと共に設けた生産ライン(図示せず)で生産するようにしても良い。
The ring-shaped product W2 serving as the bearing inner ring is produced by the pre-assembly production line portion R2 different from the pre-assembly production line portion R1 of the bearing outer ring, and is carried into the assembly process unit 17. The rolling element 2 and the cage 3 are carried into the assembly process unit 17 from the rolling element storage unit 18 and the cage storage unit 19, respectively.
The rolling element storage unit 18 and the cage storage unit 19 respectively receive the rolling element 2 and the cage 3 produced at a place different from the continuous production line from the purchaser, etc., and perform processing such as inspection and store them. It is a process part. You may make it produce the rolling element storage part 18 and the holder | retainer storage part 19 with the production line (not shown) provided with this continuous production line.

図2は、このリング状品組込機械部品の連続生産ラインのレイアウト例を示す説明図である。この例では、軸受外輪となるリング状品W1を生産する組立前生産ライン部分R1と、軸受内輪となるリング状品W2を生産する組立前生産ライン部分R2とが並列に配置されている。
軸受内輪となるリング状品W2を生産する組立前生産ライン部分R2は、軸受外輪となるリング状品W1を生産する組立前生産ライン部分R1と同様に、検査工程部11、鍛造工程部12、旋削工程部13、刻印工程部14、熱処理工程部15、および研削工程部16を順に並べ、各工程部11〜16の間にコンベヤ等の搬送手段20を設けたものとされる。内輪側の組立前生産ライン部分R2においても、鍛造工程部12は省略されていても良い。
FIG. 2 is an explanatory view showing a layout example of a continuous production line of the ring-shaped product built-in machine parts. In this example, a pre-assembly production line portion R1 for producing a ring-shaped product W1 serving as a bearing outer ring and a pre-assembly production line portion R2 for producing a ring-shaped product W2 serving as a bearing inner ring are arranged in parallel.
The pre-assembly production line portion R2 for producing the ring-shaped product W2 serving as the bearing inner ring is similar to the pre-assembly production line portion R1 for producing the ring-shaped product W1 serving as the bearing outer ring, the inspection process section 11, the forging process section 12, The turning process unit 13, the engraving process unit 14, the heat treatment process unit 15, and the grinding process unit 16 are arranged in this order, and a conveying means 20 such as a conveyor is provided between the process units 11-16. Also in the pre-assembly production line portion R2 on the inner ring side, the forging process section 12 may be omitted.

図1に示すように、熱処理工程部15は、予熱工程部15a、均熱工程部15b、焼入工程部15cおよび焼戻工程部15dを備える。熱処理工程部15は、焼入工程部15cの後段側に、焼準工程部や焼鈍工程部(いずれも図示せず)を有するものであっても良い。その場合、これら焼準工程部や焼鈍工程部は、リング状品W1を一列の縦列で搬送しながら処理を行える形式の工程部とする。   As shown in FIG. 1, the heat treatment process part 15 includes a preheating process part 15a, a soaking process part 15b, a quenching process part 15c, and a tempering process part 15d. The heat treatment process part 15 may have a normalization process part and an annealing process part (both not shown) on the rear stage side of the quenching process part 15c. In that case, these normalization process part and annealing process part are made into the process part of the format which can process, conveying the ring-shaped goods W1 in one row of columns.

予熱工程部15aは、リング状品W1を焼入れ温度に近い所定の予熱温度まで誘導加熱により加熱する工程部である。予熱温度は、A1変態点(725〜730°)よりも高く、またA2変態点(キュリー点)よりも高い温度であることが好ましく、例えば800℃程度とされる。   The preheating process unit 15a is a process unit that heats the ring-shaped product W1 to a predetermined preheating temperature close to the quenching temperature by induction heating. The preheating temperature is preferably higher than the A1 transformation point (725 to 730 °) and higher than the A2 transformation point (Curie point), for example, about 800 ° C.

均熱工程部15bは、予熱工程部15aで加熱されたリング状品W1を焼入れ温度まで連続加熱炉21で加熱する工程部である。焼入れ温度は、最高加熱温度(オーステナイト化温度)であり、例えば850℃程度とされる。
連続加熱炉21は、内部を高温雰囲気に保ち、コンベヤ等の搬送手段22にリング状品W1を縦一列に載せて搬送しながら加熱する炉である。
The soaking process part 15b is a process part which heats the ring-shaped article W1 heated by the preheating process part 15a with the continuous heating furnace 21 to quenching temperature. The quenching temperature is the maximum heating temperature (austenitizing temperature), for example, about 850 ° C.
The continuous heating furnace 21 is a furnace that keeps the inside in a high temperature atmosphere and heats the ring-shaped product W1 while being transported in a vertical row on a transport means 22 such as a conveyor.

焼入工程部15cは、均熱工程部15bで焼入温度に加熱されたリング状品W1を、冷却することで焼入する工程部であり、例えば冷却槽23内にリング状品W1を浸すことで冷却するものとされる。焼入工程部15cは、冷却液をリング状品W1に吹き付けるものであっても良い。   The quenching process unit 15c is a process unit that quenches the ring-shaped product W1 heated to the quenching temperature in the soaking process unit 15b by cooling. For example, the ring-shaped product W1 is immersed in the cooling bath 23. It is supposed to be cooled. The quenching process part 15c may spray a cooling liquid on the ring-shaped product W1.

図3は、予熱工程部15aの水平断面図と、雰囲気調整系のブロック図とを組み合わせた説明図である。予熱工程部15aは、リング状品W1を大気中から装入する装入室31と、この装入室31から移動させたリング状品W1を誘導加熱する予熱室32と、この予熱室32のリング状品W1を前記連続加熱炉21に移送する移送室33とを有する。
装入室31のリング状品W1を入れる入口34、および各室31〜33間のリング状品W1の通路35,36、および移送室33と連続加熱炉21間のリング状品W1の通路37には、それぞれ開閉扉38〜41が設けられている。これら開閉扉38〜41は、左右または上下にスライドして開閉するものとされ、開閉駆動手段(図示せず)が連結されている。
FIG. 3 is an explanatory diagram combining a horizontal sectional view of the preheating process section 15a and a block diagram of the atmosphere adjustment system. The preheating process unit 15a includes a charging chamber 31 for charging the ring-shaped product W1 from the atmosphere, a preheating chamber 32 for induction heating the ring-shaped product W1 moved from the charging chamber 31, and a preheating chamber 32. A transfer chamber 33 for transferring the ring-shaped article W1 to the continuous heating furnace 21;
An inlet 34 for inserting the ring-shaped article W1 in the charging chamber 31, a passage 35, 36 for the ring-shaped article W1 between the chambers 31 to 33, and a passage 37 for the ring-shaped article W1 between the transfer chamber 33 and the continuous heating furnace 21. Open / close doors 38 to 41 are provided respectively. The open / close doors 38 to 41 are opened and closed by sliding left and right or up and down, and open / close drive means (not shown) is connected thereto.

予熱工程部15aには、前記装入室31、予熱室32、および移送室33を、真空、または無酸化雰囲気、または連続加熱炉21の雰囲気と同等の雰囲気に変換する雰囲気変換手段42を有している。雰囲気変換手段42は、例えば各室31〜33に配管43を介して窒素ガスを送り込み、排気して入れ換える手段とされる。また、雰囲気変換手段42は、各開閉扉38〜41の開閉駆動手段を制御する機能を備えている。雰囲気変換手段42は、各室31〜33と連続加熱炉21間の開閉扉39〜41の開閉を、必ず隣接する2室間でのみ連通して外部とは密閉状態を維持するように行わせる。例えば、装填室31と予熱室32を間の開閉扉39を開けるときは、装填室31の入口38の開閉扉38と予熱室32の出口側の開閉扉40を閉じた状態とする。   The preheating process section 15a has an atmosphere converting means 42 for converting the charging chamber 31, the preheating chamber 32, and the transfer chamber 33 into a vacuum, a non-oxidizing atmosphere, or an atmosphere equivalent to the atmosphere of the continuous heating furnace 21. is doing. The atmosphere converting means 42 is, for example, a means for sending nitrogen gas to the chambers 31 to 33 via the piping 43 and exhausting and replacing them. The atmosphere converting means 42 has a function of controlling the opening / closing drive means of the opening / closing doors 38 to 41. The atmosphere converting means 42 opens and closes the open / close doors 39 to 41 between the chambers 31 to 33 and the continuous heating furnace 21 so as to communicate with each other only between two adjacent chambers and maintain a sealed state from the outside. . For example, when opening the opening / closing door 39 between the loading chamber 31 and the preheating chamber 32, the opening / closing door 38 at the inlet 38 of the loading chamber 31 and the opening / closing door 40 at the outlet side of the preheating chamber 32 are closed.

また、予熱工程部15bには、リング状品W1を装入室31に装入する装入手段44、装入室44から予熱室32に移動させる第1移動手段45、予熱室32から移送室33に移動させる第2移動手段46、および移送室33から連続加熱炉21に移送する移送手段47を有している。これら装入手段44,第1移動手段45,第2移動手段46,および移送手段47は、それぞれプッシャーまたはコンベヤ等からなる。   Further, the preheating process section 15b includes a charging means 44 for charging the ring-shaped article W1 into the charging chamber 31, a first moving means 45 for moving from the charging chamber 44 to the preheating chamber 32, and a transfer chamber from the preheating chamber 32. The second moving means 46 to be moved to 33 and the transfer means 47 to be transferred from the transfer chamber 33 to the continuous heating furnace 21 are provided. The charging means 44, the first moving means 45, the second moving means 46, and the transferring means 47 are each composed of a pusher or a conveyor.

図4は、予熱室32内の誘導加熱装置50の構成を示す。この誘導加熱装置50は、リング状品W1を載せてリング中心Oの回りに回転させる回転台51と、加熱コイル52と、加熱コイル52に電流を流す交流電源53とを備える。交流電源53は例えば高周波電源とされる。   FIG. 4 shows the configuration of the induction heating device 50 in the preheating chamber 32. The induction heating device 50 includes a turntable 51 on which the ring-shaped product W1 is placed and rotated around the ring center O, a heating coil 52, and an AC power supply 53 that supplies current to the heating coil 52. The AC power source 53 is, for example, a high frequency power source.

加熱コイル52は、リング状品W1の内周側と外周側とに跨がるように配置される下向きU字状のものが用いれ、加熱コイル52の両側の対向片部52a,52bの先端が、交流電源53に接続されている。図6は、加熱コイル52の斜視図を示す。
図4において、加熱コイル52は、加熱コイル支持体54に対して、回転台51の半径方向に位置変更可能に設置される。加熱コイル支持体54は、例えば回転台51の半径方向に延びるガイド54aを有し、このガイド54aに沿って加熱コイル52が無段階で位置変更可能とされる。その任意の変更位置で、ボルト(図示せず)等により、加熱コイル52がガイド54aに位置固定される。
As the heating coil 52, a downward U-shaped one that is disposed so as to straddle the inner peripheral side and the outer peripheral side of the ring-shaped product W1 is used, and the tips of the opposing piece portions 52a and 52b on both sides of the heating coil 52 are used. The AC power supply 53 is connected. FIG. 6 shows a perspective view of the heating coil 52.
In FIG. 4, the heating coil 52 is installed such that its position can be changed in the radial direction of the turntable 51 with respect to the heating coil support 54. The heating coil support 54 has a guide 54a extending in the radial direction of the turntable 51, for example, and the position of the heating coil 52 can be changed steplessly along the guide 54a. The heating coil 52 is fixed to the guide 54a by a bolt (not shown) or the like at an arbitrary change position.

回転台51には、リング状品W1との接触面積を小さくするための接触台51aが設けられる。接触台51aは、リング状品W1の径に応じたものに取り替え自在とされる。
回転台51は、回転台回転装置55により回転駆動され、かつ回転台昇降装置56により、回転台51上のリング状品W1が加熱コイル52の対向片52a,52b間に入る高さ位置と出る高さ位置との間に昇降させられる。
図示の例では、回転台51は、昇降枠57に軸受58を介して回転自在に設置されていて、昇降枠57が基台59に昇降ガイド60を介して昇降自在に設置されている。昇降枠57には、油圧シリンダ等の昇降駆動源61が連結されており、回転台51は昇降駆動源61により昇降枠57と共に昇降させられる。
回転台回転装置55は、モータ62と、その回転を回転台51の軸部51bに伝えるプーリまたはギヤ列等の回転伝達機構63とにより構成される。
The turntable 51 is provided with a contact table 51a for reducing the contact area with the ring-shaped product W1. The contact base 51a can be replaced with one corresponding to the diameter of the ring-shaped product W1.
The turntable 51 is driven to rotate by a turntable rotating device 55, and the turntable lifting device 56 has a height position where the ring-shaped product W1 on the turntable 51 enters between the opposing pieces 52a and 52b of the heating coil 52. It is raised and lowered between the height positions.
In the illustrated example, the turntable 51 is rotatably installed on the lift frame 57 via a bearing 58, and the lift frame 57 is installed on the base 59 so as to be lifted and lowered via a lift guide 60. A lifting drive source 61 such as a hydraulic cylinder is connected to the lifting frame 57, and the turntable 51 is lifted and lowered together with the lifting frame 57 by the lifting drive source 61.
The turntable rotating device 55 includes a motor 62 and a rotation transmission mechanism 63 such as a pulley or a gear train that transmits the rotation to the shaft portion 51 b of the turntable 51.

図7に実線で示すように、加熱コイル52は、リング状品W1の円周方向の1箇所に対応して設けられるものであっても良く、あるいは実線と一点鎖線とで示すように、リング状品W1の円周方向の複数箇所に対応して設けても良い。複数箇所に設ける場合、リング状品W1の直径方向に対向する2箇所であっても良く、また円周方向の3箇所以上に等配しても良い。
加熱コイル52の円周方向の複数箇所に設ける場合、個々の加熱コイル52を、図4の加熱コイル支持体54に対して、回転台51の半径方向に位置変更可能に設置する。
なお、図8に示すように、加熱コイル52はリング状品W1の外周に隙間を介して嵌まるリング状のものであっても良い。図示は省略するが、加熱コイル52は、リング状品W1の内周に隙間を介して嵌まるリング状のものであっても良い。加熱コイル52をリング状とする場合、リング状品W1の外周側および内周側のいずれに嵌まるものとする場合であっても、周方向に一つ割りのものとされる。
As shown by a solid line in FIG. 7, the heating coil 52 may be provided corresponding to one place in the circumferential direction of the ring-shaped product W1, or as shown by a solid line and a one-dot chain line, You may provide corresponding to the several location of the circumferential direction of the shaped article W1. When provided in a plurality of places, the number may be two places opposed in the diameter direction of the ring-shaped product W1, or may be equally arranged in three or more places in the circumferential direction.
In the case where the heating coils 52 are provided at a plurality of locations in the circumferential direction, the individual heating coils 52 are installed so that their positions can be changed in the radial direction of the turntable 51 with respect to the heating coil support 54 of FIG.
In addition, as shown in FIG. 8, the heating coil 52 may be a ring-shaped one that fits on the outer periphery of the ring-shaped product W1 via a gap. Although illustration is omitted, the heating coil 52 may be a ring-shaped one that fits into the inner periphery of the ring-shaped product W1 via a gap. When the heating coil 52 is formed in a ring shape, the heating coil 52 is divided into one piece in the circumferential direction even if the heating coil 52 is fitted on either the outer peripheral side or the inner peripheral side of the ring-shaped product W1.

上記構成の連続生産ラインによる転がり軸受1の生産過程を説明する。軸受外輪となるリング状品W1は、第1の組立前生産ライン部分R1で完成品まで生産される。この場合に、検査工程部11で検査された材料により、鍛造工程部12で粗形状のリング状品W1とされ、旋削工程部13で完成品の概略形状に旋削される。旋削されたリング状品W1は、刻印工程部14でマークMの刻印を施した後、熱処理工程部15で焼入などの熱処理が施される。熱処理の完了したリング状品W1は、研削工程部16の各段階の工程部16a〜16dで研削され、完成品とされる。
軸受内輪となるリング状品W2は、第2の組立前生産ライン部分R2で完成品まで生産される。
組立工程部17では、このように生産された内外輪であるリング状品W1,W2と、転動体2と保持器3とを、転がり軸受1に組立てる。
The production process of the rolling bearing 1 by the continuous production line having the above configuration will be described. The ring-shaped product W1 serving as the bearing outer ring is produced up to the finished product in the first pre-assembly production line portion R1. In this case, the material inspected in the inspection process unit 11 is turned into a rough ring-shaped product W1 in the forging process unit 12, and is turned into a rough shape of the finished product in the turning process unit 13. The turned ring-shaped product W1 is subjected to a heat treatment such as quenching in the heat treatment step 15 after the mark M is marked in the stamping step 14. The ring-shaped product W <b> 1 that has been subjected to the heat treatment is ground by the process parts 16 a to 16 d of the respective stages of the grinding process part 16 to obtain a finished product.
The ring-shaped product W2 serving as the bearing inner ring is produced up to the finished product in the second pre-assembly production line portion R2.
In the assembling process section 17, the ring-shaped products W <b> 1 and W <b> 2 that are the inner and outer rings produced in this way, the rolling elements 2 and the cage 3 are assembled to the rolling bearing 1.

軸受外輪となるリング状品W1および内輪となるリング状品W2は、次のように熱処理される。なお、両リング状品W1とも、互いに同様に熱処理されるため、以下は軸受外輪となるリング状品W1について説明する。   The ring-shaped product W1 serving as the bearing outer ring and the ring-shaped product W2 serving as the inner ring are heat-treated as follows. Since both ring-shaped products W1 are heat-treated in the same manner, the ring-shaped product W1 serving as a bearing outer ring will be described below.

刻印工程の終了したリング状品W1は、予熱工程部15aで焼入れ温度に近い所定の予熱温度まで誘導加熱により加熱される。この加熱されたリング状品W1は、均熱工程部15bで連続加熱炉21内を縦列に1列で搬送され、この搬送の間に、焼入れ温度まで加熱される。焼入温度まで加熱されたリング状品W1は、焼入工程部15cで冷却されることにより、焼入される。   The ring-shaped article W1 after the marking process is heated by induction heating to a predetermined preheating temperature close to the quenching temperature in the preheating process section 15a. The heated ring-shaped product W1 is conveyed in a continuous line in the continuous heating furnace 21 in the soaking step section 15b in a single row, and is heated to the quenching temperature during this conveyance. The ring-shaped product W1 heated to the quenching temperature is quenched by being cooled by the quenching process unit 15c.

この連続生産ラインによると、熱処理工程部15が、誘導加熱により加熱する予熱工程部15aと、連続加熱炉21で加熱する均熱工程部15bとを備えるため、誘導加熱によりリング状品W1の深部までエネルギ効率良く短時間で加熱することが可能であり、また連続加熱炉21によりリング状品W1の全体の均熱化が図れる。そのため、焼入温度まで誘導加熱する場合に比べて焼入品質に優れたものとできる。したがって、転がり軸受1の軌道輪となるリング状品W1であっても、要求される厳しい焼入品質に対応することができる。   According to this continuous production line, since the heat treatment process part 15 includes the preheating process part 15a heated by induction heating and the soaking process part 15b heated by the continuous heating furnace 21, the deep part of the ring-shaped product W1 by induction heating. Can be heated in a short time with high energy efficiency, and the entire heating of the ring-shaped product W1 can be achieved by the continuous heating furnace 21. Therefore, compared with the case where induction heating is performed up to the quenching temperature, the quenching quality can be improved. Therefore, even the ring-shaped product W1 that is the race of the rolling bearing 1 can meet the required strict quenching quality.

連続加熱炉21を用いるが、連続加熱炉21は焼入温度近くまで予熱されたリング状品W1を焼入温度まで昇温させるだけであるため、室温から加熱するものと異なり、加熱時間が大幅に短縮されて、炉内でリング状品W1を移動させる経路が短くて済み、設備が小型化できる。また、連続加熱炉21による加熱は僅かであるため、周辺への熱の影響が少なく、周辺環境が改善される。このため、連続加熱炉21を、旋削工程部13や刻印工程部14,研削工程部16等を含む連続生産ラインに組み込みながら、これら各工程部への連続加熱炉21による熱的影響が回避でき、リング状品W1の検査工程部11から転がり軸受1の組立工程部までの連続生産ラインが実現できる。   Although the continuous heating furnace 21 is used, the continuous heating furnace 21 only raises the temperature of the ring-shaped product W1 preheated to near the quenching temperature to the quenching temperature. Therefore, the path for moving the ring-shaped article W1 in the furnace is short, and the equipment can be downsized. Moreover, since the heating by the continuous heating furnace 21 is slight, there is little influence of the heat to the periphery, and the surrounding environment is improved. For this reason, while incorporating the continuous heating furnace 21 into a continuous production line including the turning process section 13, the marking process section 14, the grinding process section 16, etc., the thermal influence of the continuous heating furnace 21 on these process sections can be avoided. A continuous production line from the inspection process part 11 of the ring-shaped product W1 to the assembly process part of the rolling bearing 1 can be realized.

このように連続生産ライン化したことにより、生産の効率化や、工場床面積の削減、多品種少量生産への適応性向上にも貢献することができる。特に、熱処理工程部15を誘導加熱工程部15aによる予熱の後に、連続加熱炉21で昇温させるものとして連続加熱炉21を短くて済むようにしたため、リング状品W1の品種切換に際して、連続加熱炉21内に残るリング状品W1の個数が少なくて済み、多品種少量生産への適用性がより一層優れたものとなる。   Such a continuous production line can contribute to improving production efficiency, reducing the factory floor area, and improving adaptability to high-mix low-volume production. In particular, since the heat treatment process unit 15 is heated by the continuous heating furnace 21 after the preheating by the induction heating process unit 15a, the continuous heating furnace 21 can be shortened. The number of ring-shaped products W1 remaining in the furnace 21 can be reduced, and the applicability to multi-product and small-volume production is further improved.

予熱工程部15aにおける誘導加熱の加熱コイル52は、U字状のものとし、リング状品W1の半径方向に位置変更可能に設置するようにしたため、図5(A),(B)に示すように、各種の径寸法のリング状品W1に、加熱コイル52の固定位置の変更によって対応することができる。この場合に、段取り替えとして、図1の回転台51の接触台51aは、リング状品W1の径寸法に応じたものに交換する。   As shown in FIGS. 5A and 5B, the induction heating heating coil 52 in the preheating process section 15a is U-shaped and installed so that the position of the ring-shaped product W1 can be changed in the radial direction. In addition, it is possible to cope with the ring-shaped product W1 having various diameters by changing the fixing position of the heating coil 52. In this case, as a step change, the contact base 51a of the turntable 51 of FIG. 1 is replaced with one corresponding to the diameter of the ring-shaped product W1.

また、図3のように、装入室31および移送室33を設け、雰囲気変換手段42を設けたため、リング状品W1を、真空、または無酸化雰囲気、または連続加熱炉21の雰囲気と同等の雰囲気の中で連続装入、加熱、移送を行うことができる。そのため、リング状品W1の無酸化の連続処理が容易になる。また、加熱後に連続加熱炉21の雰囲気に合わせて移送室33から連続加熱炉21に移送するようにした場合は、浸炭雰囲気の連続加熱炉21にも対応することができる。   Further, as shown in FIG. 3, since the charging chamber 31 and the transfer chamber 33 are provided and the atmosphere converting means 42 is provided, the ring-shaped product W1 is equivalent to a vacuum, a non-oxidizing atmosphere, or an atmosphere of the continuous heating furnace 21. Continuous charging, heating, and transfer can be performed in an atmosphere. Therefore, the non-oxidizing continuous processing of the ring-shaped product W1 is facilitated. Moreover, when it transfers to the continuous heating furnace 21 from the transfer chamber 33 according to the atmosphere of the continuous heating furnace 21 after a heating, it can respond also to the continuous heating furnace 21 of a carburizing atmosphere.

この発明の一実施形態にかかるリング状品組込機械部品の連続生産ラインの概念構成を示す説明図である。It is explanatory drawing which shows the conceptual structure of the continuous production line of the ring-shaped goods embedded machine part concerning one Embodiment of this invention. 同連続生産ラインのレイアウト例の説明図である。It is explanatory drawing of the example of a layout of the same continuous production line. 同連続生産ラインにおける予熱工程部の水平断面図である。It is a horizontal sectional view of the preheating process part in the same continuous production line. 同予熱工程部の誘導加熱装置の破断正面図である。It is a fracture | rupture front view of the induction heating apparatus of the preheating process part. 同誘導加熱装置の加熱コイルの位置調整例の説明図である。It is explanatory drawing of the position adjustment example of the heating coil of the induction heating apparatus. 同加熱コイルの斜視図である。It is a perspective view of the heating coil. 同加熱コイルの平面配置の説明図である。It is explanatory drawing of planar arrangement | positioning of the heating coil. 加熱コイルの変形例の断面図および平面図である。It is sectional drawing and the top view of the modification of a heating coil.

符号の説明Explanation of symbols

1…転がり軸受(リング状品組込機械部品)
2…転動体
3…保持器
11…検査工程部
12…鍛造工程部
13…旋削工程部
14…刻印工程部
15…熱処理工程部
15a…予熱工程部
15b…均熱工程部
15c…焼入工程部
16…研削工程部
17…組立工程部
21…連続加熱炉
31…装入室
32…予熱室
33…移送室
34…入口
35〜37…通路
38〜41…開閉扉
51…回転台
52…加熱コイル
R1,R2…組立前生産ライン部分
W1,W2…リング状品
1 ... Rolling bearing (ring-shaped product built-in machine parts)
DESCRIPTION OF SYMBOLS 2 ... Rolling body 3 ... Cage 11 ... Inspection process part 12 ... Forging process part 13 ... Turning process part 14 ... Stamping process part 15 ... Heat treatment process part 15a ... Preheating process part 15b ... Soaking process part 15c ... Quenching process part DESCRIPTION OF SYMBOLS 16 ... Grinding process part 17 ... Assembly process part 21 ... Continuous heating furnace 31 ... Charging chamber 32 ... Preheating chamber 33 ... Transfer chamber 34 ... Inlet 35-37 ... Passage 38-41 ... Opening / closing door 51 ... Turntable 52 ... Heating coil R1, R2 ... Production line parts before assembly W1, W2 ... Ring products

Claims (4)

焼入れされたリング状品と他の部品とを組み立てた機械部品であるリング状品組込機械部品を連続して生産する生産ラインであって、
リング状品に加工するための材料を検査する検査工程部と、前記材料をリング状品の完成品の概略形状に旋削する旋削工程部と、この旋削されたリング状品に刻印を施す刻印工程部と、この刻印の施されたリング状品を熱処理する熱処理工程部と、この熱処理されたリング状品に研削を施す研削工程部と、研削の完了したリング状品を他の部品と共にリング状品組込機械部品に組み立てる組立工程部とを備え、
前記熱処理工程部が、リング状品を焼入れ温度に近い所定の予熱温度まで誘導加熱により加熱する予熱工程部と、この予熱工程部で加熱されたリング状品を焼入れ温度まで連続加熱炉で加熱する均熱工程部と、この均熱工程部で加熱されたリング状品を冷却する焼入工程部とを含むことを特徴とするリング状品組込機械部品の連続生産ライン。
A production line for continuously producing ring-shaped product built-in machine parts, which are machine parts assembled from a quenched ring-shaped product and other parts,
An inspection process section for inspecting a material to be processed into a ring-shaped product, a turning process section for turning the material into a rough shape of a finished product of the ring-shaped product, and a marking process for stamping the turned ring-shaped product A heat treatment process part for heat-treating the ring-shaped product with the engraving, a grinding process part for grinding the heat-treated ring-shaped product, and the ring-shaped product that has been ground together with other parts in a ring shape. An assembly process section for assembling the product assembly machine parts,
The heat treatment process section heats the ring-shaped product to a predetermined preheating temperature close to the quenching temperature by induction heating, and heats the ring-shaped product heated in the preheating process section to the quenching temperature in a continuous heating furnace. A continuous production line for ring-shaped product-embedded machine parts, comprising a soaking process part and a quenching process part for cooling the ring-shaped product heated in the soaking process part.
請求項1において、前記予熱工程部は、リング状品を大気中から装入する装入室と、この装入室から移動させたリング状品を誘導加熱する予熱室と、この予熱室のリング状品を前記連続加熱炉に移送する移送室とを有し、前記リング状品をそれぞれ通過させる前記装填室の入口、前記装入室と予熱室との間の通路、前記予熱室と移送室との間の通路、および移送室と前記連続加熱炉との間の通路に開閉扉を有し、前記装入室、予熱室、および移送室を、真空、または無酸化雰囲気、または連続加熱炉の雰囲気と同等の雰囲気に変換する雰囲気変換手段を有し、かつ前記リング状品を前記装入室に装入する装入手段、前記装入室から予熱室に移動させる第1移動手段、前記予熱室から移送室に移動させる第2移動手段、および移送室から連続加熱炉に移送する移送手段を有するものであるリング状品組込機械部品の連続生産ライン。   2. The preheating process section according to claim 1, wherein the preheating process section includes a charging chamber for charging the ring-shaped product from the atmosphere, a preheating chamber for induction heating the ring-shaped product moved from the charging chamber, and a ring of the preheating chamber. A transfer chamber for transferring the product to the continuous heating furnace, the entrance of the loading chamber through which the ring-shaped product passes, a passage between the charging chamber and the preheating chamber, the preheating chamber and the transfer chamber And an opening / closing door in the passage between the transfer chamber and the continuous heating furnace, and the charging chamber, the preheating chamber, and the transfer chamber have a vacuum, a non-oxidizing atmosphere, or a continuous heating furnace. An atmosphere converting means for converting the atmosphere into an atmosphere equivalent to the above atmosphere, charging means for charging the ring-shaped product into the charging chamber, first moving means for moving the charging chamber from the charging chamber to the preheating chamber, Second moving means for moving from the preheating chamber to the transfer chamber, and continuous heating from the transfer chamber Continuous production line and has a transfer means for transferring the furnace ring products built mechanical parts. 請求項1または請求項2において、前記リング状品組込機械部品が転がり軸受であり、前記リング状品が転がり軸受の軌道輪であるリング状品組込機械部品の連続生産ライン。   3. The continuous production line for ring-shaped product built-in machine parts according to claim 1 or 2, wherein the ring-shaped product built-in machine part is a rolling bearing, and the ring-shaped product is a bearing ring of the rolling bearing. 請求項3において、前記検査工程部、旋削工程部、刻印工程部、熱処理工程部、および研削工程部によりそれぞれ構成される組立前生産ライン部分が2本設けられ、これら2本の組立前生産ライン部分は、前記リング状品として、転がり軸受における内輪および外輪をそれぞれ生産するものであり、前記組立工程部は、前記2本の組立前生産ライン部分でそれぞれ生産された内輪と外輪とを他の部品と共に転がり軸受に組み立てるものであるリング状品組込機械部品の連続生産ライン。   In Claim 3, two pre-assembly production line parts each constituted by the inspection process part, the turning process part, the marking process part, the heat treatment process part, and the grinding process part are provided, and these two pre-assembly production lines are provided. The parts produce the inner ring and the outer ring in the rolling bearing as the ring-shaped product, respectively, and the assembly process unit uses the inner ring and the outer ring produced in the two pre-assembly production line parts respectively. A continuous production line for machine parts that are assembled into ring-shaped products that are assembled into rolling bearings together with the parts.
JP2005325378A 2005-11-09 2005-11-09 Continuous production line for mechanical component having annular piece built in Pending JP2007131901A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015064091A (en) * 2013-09-26 2015-04-09 株式会社ジェイテクト Bearing, method of managing bearing, and method of manufacturing bearing
JP2015064092A (en) * 2013-09-26 2015-04-09 株式会社ジェイテクト Bearing, method of manufacturing bearing, and method of managing bearing
CN108326567A (en) * 2018-03-02 2018-07-27 江苏保捷精锻有限公司 A kind of bearing race production line and its working method with Full-automatic forging structure
WO2021140853A1 (en) * 2020-01-06 2021-07-15 Ntn株式会社 Rolling bearing raceway ring and method for manufacturing same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015064091A (en) * 2013-09-26 2015-04-09 株式会社ジェイテクト Bearing, method of managing bearing, and method of manufacturing bearing
JP2015064092A (en) * 2013-09-26 2015-04-09 株式会社ジェイテクト Bearing, method of manufacturing bearing, and method of managing bearing
CN108326567A (en) * 2018-03-02 2018-07-27 江苏保捷精锻有限公司 A kind of bearing race production line and its working method with Full-automatic forging structure
WO2021140853A1 (en) * 2020-01-06 2021-07-15 Ntn株式会社 Rolling bearing raceway ring and method for manufacturing same

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