JP2008231451A - Heat treatment method for annular body, and annular body sizing tool - Google Patents
Heat treatment method for annular body, and annular body sizing tool Download PDFInfo
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Abstract
Description
本発明は、例えば、転がり軸受の内外輪などをはじめとした様々な機械部品に用いられる鋼製の環状体の熱処理方法およびその熱処理の際の変形を防止する環状体矯正治具に関するものである。 The present invention relates to a heat treatment method for a steel annular body used for various machine parts such as inner and outer rings of a rolling bearing, and an annular body correcting jig for preventing deformation during the heat treatment. .
現在、鋼からなる金属部品の殆どは、機械的強度や耐摩耗性などを向上させるために所定の熱処理が施されているが、この熱処理に際しては素材の変形が問題となってくる。例えば、マルテンサイト変態を伴う鋼からなる環状体は、熱処理時に変形が発生し、製造の品質やコストに大きく影響する。
このような熱処理に伴う鋼材の変形が発生する要因としては、例えば、旋削、鍛造などの前加工による歪みが熱によって顕在化する他、浸炭などの熱処理による歪みが加熱時に開放されて変形が発生したり、また、浸炭などで一次焼入れによって変形が発生する場合もある。また、熱処理時における不均一加熱や不均一冷却も局所的な内部応力が発生するため、変形を招く大きな要因となっている。
Currently, most metal parts made of steel are subjected to a predetermined heat treatment in order to improve mechanical strength, wear resistance, etc., but deformation of the material becomes a problem during this heat treatment. For example, an annular body made of steel with martensitic transformation is deformed during heat treatment, which greatly affects the quality and cost of production.
Factors that cause deformation of steel materials due to such heat treatment include, for example, distortion caused by pre-processing such as turning, forging, etc. due to heat, and distortion caused by heat treatment such as carburizing is released during heating. In addition, deformation may occur due to primary quenching due to carburization or the like. In addition, non-uniform heating and non-uniform cooling during heat treatment are also a major factor causing deformation because local internal stress is generated.
このような熱処理に伴う鋼材の変形に対しては、その使用される部品の種類や目的などの応じてその許容度に差があり、使用目的によっては殆ど問題がないケースもあるが、使用目的が精密機械用の部品、例えば、転がり軸受の内外輪などを構成する環状体として用いる場合にあっては、熱処理時の変形に伴う真円度の悪化や反りの発生が大きな問題となる。 There is a difference in tolerance depending on the type and purpose of the parts used for the deformation of the steel material due to such heat treatment, and there are cases where there is almost no problem depending on the purpose of use. However, when it is used as a precision machine component, for example, as an annular body constituting the inner and outer rings of a rolling bearing, deterioration of roundness and warpage due to deformation during heat treatment become a serious problem.
そのため、例えば以下の特許文献１などでは、素材および前加工段階で内部応力を除去したり、焼入れ槽内でバスケットを引き上げて均熱させたり、あるいは冷却時にワークをバスケットごと上下に揺動させて均一に冷却させることでワークの熱処理時の変形を防止するようにしている。
また、以下の特許文献２などでは、冷却時にワークを金型に張り付かせるようにしてマルテンサイト変態を矯正するようにしている。
In Patent Document 2 and the like described below, the martensitic transformation is corrected by sticking the work to the mold during cooling.
しかしながら、前記特許文献１などに開示されているような方法では、加熱時に生ずる変形を抑えることはできるが、熱処理要因として最も重要な冷却時の変形を低減することは難しい。
また、バスケットを移動させる方法で、従来方式に比べてバラつきを低下させるのには好ましいが、やはり積載位置によるワークの冷却の違いを完全に無くすことはできない。さらに環状体の真円度を向上させる能力において課題がある。
However, the method disclosed in Patent Document 1 can suppress deformation that occurs during heating, but it is difficult to reduce deformation during cooling, which is the most important factor for heat treatment.
In addition, although the method of moving the basket is preferable for reducing the variation as compared with the conventional method, the difference in cooling of the workpiece depending on the loading position cannot be completely eliminated. Furthermore, there is a problem in the ability to improve the roundness of the annular body.
一方、特許文献２に開示されているような方法では、良好な真円度は得られるものの、単品での処理となるため、処理能力が低く製造コストが高くなる傾向がある。
そこで、本発明は前記のような問題点を解決するために案出されたものであり、その主な目的は、熱処理時の変形を防止して良好な真円度を得ると共に処理効率に優れた新規な環状体の熱処理方法および環状体矯正治具を提供するものである。
On the other hand, in the method disclosed in Patent Document 2, although a good roundness can be obtained, since it is a single product process, the processing capacity tends to be low and the manufacturing cost tends to be high.
Therefore, the present invention has been devised to solve the above-mentioned problems, and its main purpose is to prevent deformation during heat treatment to obtain a good roundness and to be excellent in processing efficiency. In addition, a novel annular body heat treatment method and an annular body correcting jig are provided.
前記課題を解決するために本発明の環状体の熱処理方法は、
鋼からなる環状体の熱処理方法であって、前記環状体を加熱および焼入れをする際に、予め当該環状体の内側または外側に環状体矯正治具を取り付け、当該環状体の内側または外側を当該環状体矯正治具で間欠的に支持した状態で前記環状体を加熱および焼入れを行うことを特徴とするものである。
In order to solve the above-mentioned problems,
A heat treatment method for an annular body made of steel, wherein when the annular body is heated and quenched, an annular body correcting jig is attached in advance to the inside or outside of the annular body, and the inside or outside of the annular body is attached to the inside or outside of the annular body. The annular body is heated and quenched while being intermittently supported by the annular body correcting jig.
また、このような本発明の環状体の熱処理方法において、この環状体矯正治具として、前記環状体の内側に挿入される正三角柱状のブロック体と、当該ブロック体を前記環状体に保持する保持部とからなるものを用いることが望ましい。
また、このような本発明の環状体の熱処理方法において、前記環状体矯正治具として、前記環状体の内部に挿入される軸部と、当該軸部から前記環状体の内面側に向かって１２０°軸回転対称に延びる３つの支持部と、当該支持部を前記環状体内に保持する保持部とからなるものを用いることが望ましい。
Further, in the annular body heat treatment method of the present invention, as the annular body correction jig, a regular triangular prism-shaped block body inserted inside the annular body, and the block body is held by the annular body. It is desirable to use what consists of a holding | maintenance part.
Moreover, in such a heat treatment method for an annular body according to the present invention, as the annular body correcting jig, a shaft portion inserted into the annular body, and 120 toward the inner surface side of the annular body from the shaft portion. It is desirable to use a structure that includes three support portions that extend in a rotationally symmetrical manner and a holding portion that holds the support portion in the annular body.
一方、本発明の環状体矯正治具は、
鋼からなる環状体を熱処理する際の変形を矯正する治具であって、前記環状体の内側に挿入される正三角柱状のブロック体と、当該ブロック体を前記環状体に保持する保持部とからなることを特徴とするものである。
また、本発明の環状体矯正治具は、
鋼からなる環状体を熱処理する際の変形を矯正する治具であって、前記環状体の内部に挿入される軸部と、当該軸部から前記環状体の内面側に向かって１２０°軸回転対称に延びる３つの支持部と、当該支持部を前記環状体内に保持する保持部とからなることを特徴とするものである。
On the other hand, the annular body correcting jig of the present invention is
A jig for correcting deformation when heat-treating an annular body made of steel, a regular triangular prism-shaped block body inserted inside the annular body, and a holding portion for holding the block body on the annular body It is characterized by comprising.
Further, the annular body correcting jig of the present invention is
A jig for correcting deformation when heat-treating an annular body made of steel, and a shaft portion inserted into the annular body, and a 120 ° axial rotation from the shaft portion toward the inner surface side of the annular body It comprises three support portions extending symmetrically and a holding portion for holding the support portion in the annular body.
一般に環状体の熱処理に際して発生する変形の殆どは、径方向に拡縮する楕円状の変形であり、僅かに存在するのが三角形以上の多角形を呈する変形である。これは、特に焼入れ時の冷却速度の違いに起因するものであるが、少なくとも三角形以上の多角形に変形した場合の真円度は、楕円形状に変形した場合よりも良好である。
そこで、本発明方法は、熱処理対象となる環状体を少なくとも三角形状以上の多角形に変形させれば、楕円形状の変形に比べて良好な真円度が得られるとの知見に基づいて案出されたものである。
In general, most of the deformation that occurs during the heat treatment of the annular body is an elliptical deformation that expands and contracts in the radial direction, and a slight deformation is a deformation that exhibits a polygon more than a triangle. This is due to the difference in the cooling rate especially during quenching, but the roundness when deformed into a polygon of at least a triangle is better than when deformed into an elliptical shape.
Therefore, the method of the present invention has been devised based on the knowledge that if the annular body to be heat-treated is deformed to at least a triangular or more polygonal shape, a better roundness can be obtained compared to the elliptical deformation. It has been done.
具体的には、前述したように鋼からなる環状体を加熱および焼入れをする際に、予め当該環状体の内側または外側に環状体矯正治具を取り付け、当該環状体の内側または外側を当該環状体矯正治具で間欠的に支持した状態で前記環状体を加熱および焼入れを行うようにしたものである。
これによって、鋼からなる環状体を加熱および焼入れをする際に環状体が楕円形状に大きく変形するのを防止（矯正）できるため、良好な真円度を得ることができる。
また、この環状体矯正治具を取り付けた状態で加熱および焼入れ処理を纏めて行うことができるため、優れた処理効率を発揮することができる。
Specifically, as described above, when heating and quenching an annular body made of steel, an annular body correcting jig is attached in advance to the inside or outside of the annular body, and the inside or outside of the annular body is connected to the annular body. The annular body is heated and quenched while being intermittently supported by a body correction jig.
Thereby, when the annular body made of steel is heated and quenched, the annular body can be prevented (corrected) from being greatly deformed into an elliptical shape, so that a good roundness can be obtained.
In addition, since the heating and quenching processes can be performed together with the annular body correcting jig attached, excellent processing efficiency can be exhibited.
次に、本発明に係る環状体の熱処理方法の実施の一形態を添付図面を参照しながら詳細に説明する。
図１および図２は、本発明方法で用いる環状体矯正治具１００の実施の一形態を示したものである。
図示するように、この環状体矯正治具１００は、断面矩形状の環状体（ワークリング）Ｗの内側に挿入されるブロック体１０と、このブロック体１０をその環状体Ｗに保持する保持部２０とから構成されている。
Next, an embodiment of the heat treatment method for an annular body according to the present invention will be described in detail with reference to the accompanying drawings.
1 and 2 show an embodiment of an annular body correcting jig 100 used in the method of the present invention.
As shown in the figure, the annular body correcting jig 100 includes a block body 10 inserted inside an annular body (working ring) W having a rectangular cross section, and a holding portion that holds the block body 10 on the annular body W. 20.
このブロック体１０は、その中心軸から周方向に沿って１２０°軸回転対称に３つの頂部１１、１１、１１を有する正三角柱状に形成されており、各頂部１１、１１、１１がそれぞれ環状体Ｗの内周面側に当接してその内径を３点で拘束するようになっている。なお、これら頂部１１、１１、１１の先端部１２，１２，１２は、変形時の応力集中を回避すると共に着脱時などにおいて環状体Ｗの内周面を不要に傷付けないように、その高さ方向に沿って曲面状に面取りされた状態となっている。 The block body 10 is formed in a regular triangular prism shape having three apexes 11, 11, and 11 that are rotationally symmetrical by 120 ° along the circumferential direction from the central axis, and each apex 11, 11, and 11 is annular. It abuts on the inner peripheral surface side of the body W and restrains its inner diameter at three points. The tip portions 12, 12, and 12 of the top portions 11, 11, and 11 have heights so as to avoid stress concentration during deformation and to prevent unnecessary damage to the inner peripheral surface of the annular body W during attachment and detachment. The surface is chamfered in a curved shape along the direction.
一方、保持部２０は、この正三角柱状のブロック体１０の底面側にこれと一体となった正三角形状のベース２１と、このベース２１の各頂部からＬ字形に延びる３つの係合片２２，２２，２２とから構成されており、図示すように、これら３つの係合片２２，２２，２２とブロック体１０の各頂部１１、１１、１１間に前記環状体Ｗを嵌め込んでこの環状体Ｗをその内外から３点で保持するようになっている。 On the other hand, the holding portion 20 includes a regular triangular base 21 integrated with the bottom surface of the regular triangular prism-shaped block body 10 and three engagement pieces 22 extending in an L shape from each top portion of the base 21. , 22, 22, and as shown in the drawing, the annular body W is fitted between the three engaging pieces 22, 22, 22 and the top portions 11, 11, 11 of the block body 10. The annular body W is held at three points from inside and outside.
なお、この環状体矯正治具１００を構成する材料としては特に限定されるものではないが、少なくとも熱変形時の環状体Ｗの応力にも充分耐え得る程度の強度を有すると共に、熱処理時における耐熱性や耐熱衝撃および耐油性などに優れているものを用いることが望ましく、例えば、窒化珪素系のセラミックや非鉄金属などを用いることができる。
そして、このような環状体矯正治具１００を用いて環状体Ｗの熱処理を行う場合は、先ず、旋削や鍛造などの前加工や浸炭などの前処理が施された複数の環状体Ｗを、図２に示すように環状体矯正治具１００をそれぞれ取り付けた状態でバスケット内に積載して加熱炉内に設置し、その環状体Ｗを少なくとも焼入可能な温度であるＡＣ１変態点（約７３０℃）以上に加熱処理する。
The material constituting the annular body correcting jig 100 is not particularly limited, but at least has a strength sufficient to withstand the stress of the annular body W during thermal deformation, and has heat resistance during heat treatment. For example, a silicon nitride ceramic or a non-ferrous metal may be used.
And when performing the heat treatment of the annular body W using such an annular body correction jig 100, first, a plurality of annular bodies W that have been subjected to pre-processing such as turning or forging or pre-processing such as carburizing, Figure 2 an annular body straightening jig 100 as shown and placed stacked in the basket in a heating furnace in a state of mounting respectively, a C1 transformation point is at least hardenable temperature the annular body W (approximately 730 ° C.) or higher.
この加熱処理に際しては、温度の上昇に伴って各環状体Ｗが径方向および軸方向に熱膨張すると共に内在する歪が顕在化して楕円形などに変形しようとするが、その外周面側は、この環状体矯正治具１００の保持部２０を構成する３つの係合片２２，２２，２２によって外径側が拘束されているため、それ以上に拡径することがなくなって楕円形状に変形することがなく、むしろ拡径しようとする力が周方向に伝達して拘束されていない係合片２２，２２，２２間の部分が膨らむように変形するような傾向になる。これによって、加熱時における変形に際して良好な真円度を維持することができる。 At the time of this heat treatment, each annular body W expands in the radial direction and the axial direction as the temperature rises, and the inherent strain is manifested and tends to be deformed into an elliptical shape. Since the outer diameter side is constrained by the three engagement pieces 22, 22, and 22 constituting the holding portion 20 of the annular body correcting jig 100, the diameter does not further increase and deforms into an elliptical shape. Rather, the force to expand the diameter tends to be deformed so that the portion between the engagement pieces 22, 22, 22 that is not restrained by being transmitted in the circumferential direction swells. As a result, good roundness can be maintained during deformation during heating.
そして、このようにして各環状体Ｗを所定の温度まで加熱した状態が一定時間経過（例えば、８５０℃×３０分）したならば、これら各環状体Ｗをそのバスケットと共に焼入れ油で満たされた焼入れ槽内に浸漬してその環状体Ｗをその臨界冷却速度以上の冷却速度で冷却して焼入れを実施する。
ここで、この焼入れ（冷却）に際しては、各環状体Ｗが今度は反対に熱収縮すると共に冷却ムラによって同じく楕円形などに変形しようとするが、その内周面側は、この環状体矯正治具１００のブロック体１０を構成する３つの頂部１１，１１，１１によって拘束されているため、それ以上に縮径することがなくなって楕円形状に変形することができなくなり、むしろ縮径しようとする力が周方向に伝達して三角形状に変形するような傾向になる。これによって、焼入れ（冷却）時における変形に際しても良好な真円度を維持することができる。
Then, if the state in which each annular body W is heated to a predetermined temperature in this way has elapsed for a certain time (for example, 850 ° C. × 30 minutes), each of the annular bodies W is filled with quenching oil together with the basket. The annular body W is immersed in a quenching tank and cooled at a cooling rate higher than the critical cooling rate, and quenching is performed.
Here, at the time of this quenching (cooling), each annular body W is thermally contracted in the opposite direction and tends to be deformed into an elliptical shape due to cooling unevenness. Since it is constrained by the three top portions 11, 11, 11 constituting the block body 10 of the tool 100, the diameter is not reduced any further, and it cannot be deformed into an elliptical shape. The force tends to be transmitted in the circumferential direction and deformed into a triangular shape. As a result, good roundness can be maintained even during deformation during quenching (cooling).
そして、この焼入れ（冷却）によって環状体Ｗの温度が低下し、Ｍｓ点に達してマルテンサイト変態膨張に転じた場合には、加熱膨張時と同様にその環状体Ｗの外周面側がこの環状体矯正治具１００の保持部２０を構成する３つの係合片２２，２２，２２によって外径側が拘束されているため、それ以上に拡径することがなくなって楕円形状に変形することがない。 Then, when the temperature of the annular body W is lowered by this quenching (cooling) and reaches the Ms point and turns into martensitic transformation expansion, the outer peripheral surface side of the annular body W is the annular body as in the case of the thermal expansion. Since the outer diameter side is restrained by the three engagement pieces 22, 22, 22 constituting the holding part 20 of the correction jig 100, the diameter does not further increase and the ellipse is not deformed.
従って、本発明方法によれば、熱膨張・収縮の際の変形のみならず、マルテンサイト変態膨張の際の変形に際しても対応することができ、終始良好な真円度を維持することができる。
また、図１に示すように、この環状体矯正治具１００（のブロック体１０）と環状体Ｗとの間には、それぞれ大きな隙間Ｓ、Ｓ、Ｓが生じ、これらの隙間Ｓ、Ｓ、Ｓを介して焼入れ油などが良好に流通することになるため、環状体矯正治具１００を取り付けたことによる環状体Ｗの冷却への悪影響（冷却ムラ）を抑えることができる。
Therefore, according to the method of the present invention, not only deformation at the time of thermal expansion / contraction but also deformation at the time of martensitic transformation expansion can be dealt with, and good roundness can be maintained throughout.
Further, as shown in FIG. 1, large gaps S, S, S are generated between the annular body correcting jig 100 (the block body 10 thereof) and the annular body W, respectively. Since quenching oil etc. will distribute | circulate favorably through S, the bad influence (cooling nonuniformity) to the cooling of the annular body W by attaching the annular body correction jig | tool 100 can be suppressed.
従って、単に優れた真円度を得るためには、この環状体矯正治具１００のブロック体１０を三角形よりも多角形にしたほうが良いように思われる（究極的には円形）が、多角形になるほどこの隙間Ｓが狭くなって焼入れ油などが流れ難くなるため、冷却ムラ（環状体Ｗの内周側の冷却不足）による影響が顕著に現れる。従って、これらを勘案するとこの環状体矯正治具１００のブロック体１０としては三角形（三角柱状）が最良な形状と考えられる。 Therefore, in order to simply obtain excellent roundness, it seems that it is better to make the block body 10 of the annular body correcting jig 100 polygonal than triangular (ultimately circular), but polygonal Since the gap S becomes narrower and quenching oil or the like hardly flows, the effect of cooling unevenness (insufficient cooling on the inner peripheral side of the annular body W) appears remarkably. Therefore, when these are taken into consideration, the triangle (triangular prism shape) is considered to be the best shape as the block body 10 of the annular body correcting jig 100.
一方、このような観点から考えると、この環状体矯正治具１００のブロック体１０としては必ずしも三角形（三角柱状）でなくても良く、例えば、図３などに示すような放射状の形状であっても良い。
すなわち、図３に示す環状体矯正治具１００は、前記の三角柱状のブロック体１０に代わって、この環状体Ｗの内部に挿入される円筒状の軸部３０と、この軸部３０の周面からから前記環状体Ｗの内面側に向かって１２０°軸回転対称に延びる３つの支持部３１，３１，３１とで構成したものであり、この３つの支持部３１，３１，３１によって前記のブロック体１０と同様に環状体Ｗの内側を３点支持するようになっている。
On the other hand, from this point of view, the block body 10 of the annular body correcting jig 100 does not necessarily have a triangular shape (triangular prism shape), for example, a radial shape as shown in FIG. Also good.
That is, the annular body correcting jig 100 shown in FIG. 3 replaces the triangular prism-shaped block body 10 with a cylindrical shaft portion 30 inserted into the annular body W, and the periphery of the shaft portion 30. The three support portions 31, 31, 31 that extend from the surface toward the inner surface side of the annular body W in a 120-degree axis rotational symmetry are configured by the three support portions 31, 31, 31. Similar to the block body 10, the inner side of the annular body W is supported at three points.
そして、このような形状にすれば、前記の環状体矯正治具１００に比べて形状がやや複雑になる分製作コストは高くなるものの、前記の環状体矯正治具１００と同様に環状体Ｗとの間に大きな隙間Ｓを形成することが可能となるため、同様な効果を発揮することができる。
なお、前述したように環状体Ｗの熱処理に伴う変形は、特に焼入れ（冷却）時に顕著となるため、環状体矯正治具１００を構成する要素のなかでも環状体Ｗの内径を拘束するブロック体１０の部分の方が重要となってくる。従って、この環状体Ｗからブロック体１０が外れないような状態で冷却が行われる場合には、この環状体矯正治具１００をブロック体１０のみで構成して保持部２０などを省略した構造としても良い。
And, if such a shape is used, the manufacturing cost is higher because the shape is slightly more complicated than the annular body correcting jig 100, but the annular body W and the annular body correcting jig 100 are similar to the annular body correcting jig 100. Since a large gap S can be formed between the two, a similar effect can be exhibited.
In addition, since the deformation | transformation accompanying the heat processing of the annular body W becomes remarkable especially at the time of hardening (cooling) as mentioned above, the block body which restrains the internal diameter of the annular body W among the elements which comprise the annular body correction jig 100. The 10 part is more important. Therefore, when cooling is performed in a state where the block body 10 is not detached from the annular body W, the annular body correcting jig 100 is configured by only the block body 10 and the holding portion 20 and the like are omitted. Also good.
また、この環状体矯正治具１００の軽量化などのために、殆ど応力がかからないブロック体１０の中心部分を中抜きして筒状にしても良い。
また、本発明方法によれば、例えば、ズブ焼入れや浸炭焼入れなどを問わず、あらゆる焼入れ方式に適用することができる。
また、本発明方法の処理対象となる環状体Ｗは、前述したように転がり軸受（玉軸受）の内外輪やその軌道面、軌道を有する軸、複雑形状を有する円錐ころ軸受の内外輪などに加え、あらゆる機械部品などに適用することができる。
Further, in order to reduce the weight of the annular body correcting jig 100, the central portion of the block body 10 to which almost no stress is applied may be hollowed out into a cylindrical shape.
Moreover, according to the method of the present invention, it can be applied to any quenching method regardless of, for example, submerged quenching or carburizing quenching.
Further, as described above, the annular body W to be processed by the method of the present invention is applied to the inner and outer rings of the rolling bearing (ball bearing), its raceway surface, the shaft having the raceway, the inner and outer rings of the tapered roller bearing having a complicated shape, and the like. In addition, it can be applied to all machine parts.
次に、本発明方法に係る具体的実施例を説明する。
試料として熱間鍛造および旋削によって作成した外径６０ｍｍ×肉厚７ｍｍ×幅１１ｍｍの軸受鋼（ＳＵＪ２）からなる複数の環状体を用い、それら各試料にそれぞれ図４に示すような７種類の治具を取り付けてから７００×１４００ｍｍ×７段積みバスケットに収容して加熱炉で８５０℃で３０分加熱保持した後、そのバスケットごと７０℃の焼入れ油に浸漬して１０分間冷却し、冷却後を各試料の真円度を測定した。
Next, specific examples according to the method of the present invention will be described.
As a sample, a plurality of annular bodies made of bearing steel (SUJ2) having an outer diameter of 60 mm, a thickness of 7 mm, and a width of 11 mm prepared by hot forging and turning are used, and each of these samples has seven types of jigs as shown in FIG. After attaching the tool, it is stored in a 700 x 1400 mm x 7 stack basket, heated and held at 850 ° C for 30 minutes in a heating furnace, then immersed in quenching oil at 70 ° C for 10 minutes and cooled for 10 minutes. The roundness of each sample was measured.
ここで、真円度は、Ｎ＝１００より最大の直径不動および反りを求めた。変形位相は真円度測定機によって測定した後、調和解析によって各位相成分を求めた。
この結果、図５からも分かるように、本発明の環状体矯正治具１００に対応する治具Ａ〜Ｅを用いた実施例１〜５の各試料は、良好な真円度が得られると共に、最大反りも４０以下と小さかった。
Here, for roundness, the maximum diameter immobility and warpage were determined from N = 100. The deformation phase was measured by a roundness measuring machine, and then each phase component was obtained by harmonic analysis.
As a result, as can be seen from FIG. 5, each of the samples of Examples 1 to 5 using the jigs A to E corresponding to the annular body correcting jig 100 of the present invention can obtain good roundness. The maximum warpage was as small as 40 or less.
これに対し、多角形（８角形）の治具Ｆを用いた比較例１では、最大反りは小さかったものの真円度は実施例よりも劣ってしまった。
また、環状体の内側を２点支持する治具Ｇを用いた比較例２および治具を用いることなくそのまま熱処理を施した比較例３（Ｈ）にあっては、いずれも大きく変形して最大反りが大きい上に真円度も悪かった。
On the other hand, in Comparative Example 1 using the polygonal (octagonal) jig F, the maximum warpage was small, but the roundness was inferior to that of the example.
Further, in Comparative Example 2 using the jig G that supports two points inside the annular body and in Comparative Example 3 (H) in which the heat treatment is performed without using the jig, both are greatly deformed to the maximum. The warpage was great and the roundness was bad.
１００…環状体矯正治具
１０…ブロック体
１１…頂部
１２…先端部
２０…保持部
２１…拘束片
３０…軸部
３１…支持部
Ｓ…隙間
Ｗ…環状体（ワークリング）
DESCRIPTION OF SYMBOLS 100 ... Ring body correction jig 10 ... Block body 11 ... Top part 12 ... Tip part 20 ... Holding part 21 ... Restraint piece 30 ... Shaft part 31 ... Support part S ... Gap W ... Ring body (working)
Claims (5)
前記環状体を加熱および焼入れをする際に、予め当該環状体の内側または外側に環状体矯正治具を取り付け、当該環状体の内側または外側を当該環状体矯正治具で間欠的に支持した状態で前記環状体を加熱および焼入れを行うことを特徴とする環状体の熱処理方法。 A heat treatment method for an annular body made of steel,
When heating and quenching the annular body, an annular body correcting jig is previously attached to the inside or outside of the annular body, and the inside or outside of the annular body is intermittently supported by the annular body correcting jig. A method for heat treatment of an annular body, comprising heating and quenching the annular body.
前記環状体矯正治具として、前記環状体の内側に挿入される正三角柱状のブロック体と、当該ブロック体を前記環状体に保持する保持部とからなるものを用いることを特徴とする環状体の熱処理方法。 In the heat processing method of the annular body according to claim 1,
An annular body comprising a regular triangular prism-shaped block body inserted inside the annular body and a holding portion for holding the block body on the annular body as the annular body correcting jig. Heat treatment method.
前記環状体矯正治具として、前記環状体の内部に挿入される軸部と、当該軸部から前記環状体の内面側に向かって１２０°軸回転対称に延びる３つの支持部と、当該支持部を前記環状体内に保持する保持部とからなるものを用いることを特徴とする環状体の熱処理方法。 In the heat processing method of the annular body according to claim 1,
As the annular body correcting jig, a shaft portion inserted into the annular body, three support portions extending from the shaft portion toward the inner surface side of the annular body in a 120-degree axis rotational symmetry, and the support portion What is used is a heat treatment method for an annular body, comprising a holding portion that holds the inside of the annular body.
前記環状体の内側に挿入される正三角柱状のブロック体と、当該ブロック体を前記環状体に保持する保持部とからなることを特徴とする環状体矯正治具。 A jig for correcting deformation when heat-treating an annular body made of steel,
An annular body correcting jig comprising: a regular triangular prism-shaped block body inserted inside the annular body; and a holding portion that holds the block body on the annular body.
前記環状体の内部に挿入される軸部と、当該軸部から前記環状体の内面側に向かって１２０°軸回転対称に延びる３つの支持部と、当該支持部を前記環状体内に保持する保持部とからなることを特徴とする環状体矯正治具。 A jig for correcting deformation when heat-treating an annular body made of steel,
A shaft portion that is inserted into the annular body, three support portions that extend from the shaft portion toward the inner surface side of the annular body in a 120-degree axis rotational symmetry, and a holder that holds the support portion in the annular body An annular body correcting jig characterized by comprising a part.
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| JP2007068292A JP2008231451A (en) | 2007-03-16 | 2007-03-16 | Heat treatment method for annular body, and annular body sizing tool |
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| ES2409534R1 (en) * | 2011-12-22 | 2013-10-11 | Valeo Termico Sa | HEAT EXCHANGER FOR GASES, ESPECIALLY OF EXHAUST GASES OF AN ENGINE |
| CN103639248A (en) * | 2013-10-31 | 2014-03-19 | 中信重工机械股份有限公司 | Correction method of elliptical deformation of large ring parts after heat treatment |
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| ES2409534R1 (en) * | 2011-12-22 | 2013-10-11 | Valeo Termico Sa | HEAT EXCHANGER FOR GASES, ESPECIALLY OF EXHAUST GASES OF AN ENGINE |
| CN103639248A (en) * | 2013-10-31 | 2014-03-19 | 中信重工机械股份有限公司 | Correction method of elliptical deformation of large ring parts after heat treatment |
| JP2018078796A (en) * | 2017-12-21 | 2018-05-17 | 三菱電機株式会社 | Compressor manufacturing device and compressor manufacturing method |
| JP2020105537A (en) * | 2018-12-25 | 2020-07-09 | 株式会社ジェイテクト | Manufacturing method of structure member of constant velocity joint |
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| CN113046524A (en) * | 2021-03-05 | 2021-06-29 | 苏州市旭飞精密机械有限公司 | Heat treatment process for traction ring |
| CN113046524B (en) * | 2021-03-05 | 2024-02-27 | 苏州奥轩精密科技有限公司 | Traction ring heat treatment process |
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