JPH10156436A - Method for straightening deformation of long size member - Google Patents
Method for straightening deformation of long size memberInfo
- Publication number
- JPH10156436A JPH10156436A JP31072296A JP31072296A JPH10156436A JP H10156436 A JPH10156436 A JP H10156436A JP 31072296 A JP31072296 A JP 31072296A JP 31072296 A JP31072296 A JP 31072296A JP H10156436 A JPH10156436 A JP H10156436A
- Authority
- JP
- Japan
- Prior art keywords
- tempering
- long member
- deformation
- correction
- straightening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、硬化熱処理を行
った棒状や柱状部材、例えばリニアガイドのレールやボ
ールねじのねじ軸等の比較的長尺である精密機械部品の
ような鋼製の長尺部材に生じている変形を矯正する、熱
処理による矯正方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rod-shaped or column-shaped member which has been subjected to a hardening heat treatment, for example, a steel long member such as a relatively long precision machine part such as a linear guide rail or a ball screw screw shaft. The present invention relates to a correction method by heat treatment for correcting deformation occurring in a measuring member.
【０００２】[0002]
【従来の技術】長尺状の鋼に硬化熱処理を行ない、その
後に旋削や研削加工等を行なって精密な寸法に仕上げら
れる棒状や柱状の高強度な精密機械部品については、そ
の硬化熱処理によって長手方向の反り・曲がりやねじれ
等の変形が発生する。2. Description of the Related Art High-strength precision machine parts, such as rods and columns, which are subjected to hardening heat treatment on long steel and then turned, ground, etc. to finish to precise dimensions, are subjected to hardening heat treatment. Deformation such as warping, bending, and twisting of the direction occurs.
【０００３】この反り等の変形の従来の変形矯正方法と
しては、例えば特開平１−２７８９１５号公報等に記載
されているように、硬化熱処理及び焼戻し処理を実施し
た長尺部材に対し、反り、曲がり、及びねじれ等の生じ
た長手方向の変形箇所を数個の支持を持ったロールによ
って常温で且つ個々に冷間加工を行なうことで、塑性変
形させて矯正を行っている。[0003] As a conventional deformation correcting method for deformation such as warping, for example, as described in Japanese Patent Application Laid-Open No. 1-278915, a long member that has been subjected to a hardening heat treatment and a tempering treatment is warped, A portion deformed in the longitudinal direction where bending or torsion occurs is cold-worked individually at room temperature by a roll having several supports, thereby plastically deforming and correcting the portion.
【０００４】例えば、上記矯正を必要とする長尺部材で
あるリニアガイド用レールの製造工程おいては、従来、
次のようにして行われる。即ち、冷間引抜きや切削等に
より荒加工をした後に、素材に応じ高周波焼入れ・浸炭
焼入れ等によって硬化熱処理を行う。その後、焼戻しを
実施した後に、上述のような方法で冷間加工によって長
手方向の曲がり矯正を行い、続いて研削等の仕上加工を
実施して所望の精度の製品とする。For example, in the manufacturing process of a linear guide rail, which is a long member that needs to be corrected, conventionally,
This is performed as follows. That is, after roughing by cold drawing, cutting, or the like, hardening heat treatment is performed by induction hardening, carburizing quenching, or the like depending on the material. Thereafter, after tempering is performed, bending in the longitudinal direction is corrected by cold working in the above-described manner, and subsequently, finishing such as grinding is performed to obtain a product having a desired accuracy.
【０００５】この製造工程は、ボールねじのねじ軸等の
他の長尺部材の精密機械部品であっても同様である。[0005] This manufacturing process is the same for precision mechanical parts of other long members such as a screw shaft of a ball screw.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、上記の
ような変形矯正方法は、熱処理後の材料性質を変化させ
ない目的で常温で矯正を行っているが、この従来方法で
は、長尺部材の弾性変形量と塑性変形量の比率を経験的
に求め、個々の変形箇所に対して矯正力を加えるため、
実際には全体の変形矯正効果のばらつきが大きい。その
ため、荒矯正、中間矯正、仕上矯正と段階的に矯正を行
う必要があり、変形矯正処理にかかる工数はかなり大き
なものとなってしまう。However, in the above-mentioned deformation correcting method, the correction is performed at room temperature for the purpose of not changing the material properties after the heat treatment. To empirically determine the ratio between the amount of plastic deformation and the amount of plastic deformation,
In practice, the variation in the overall deformation correcting effect is large. For this reason, it is necessary to perform the correction stepwise as rough correction, intermediate correction, and finish correction, and the man-hour required for the deformation correction processing becomes considerably large.
【０００７】しかも、製品一つ一つによって、各工程の
矯正時間が大幅に異なり、同じ製品でも３倍以上の矯正
時間がかかる場合がある。特に、荒矯正時に矯正効果が
不十分であったものについては、冷間加工により製品が
加工硬化するため、次の矯正を行うための加圧力の見極
めが難しくなり、この結果、結果的に矯正工程に膨大な
時間がかかり、生産性が著しく低下する。[0007] In addition, the correction time of each process varies greatly depending on each product, and the correction time may be three times or more for the same product. In particular, if the straightening effect was insufficient at the time of rough straightening, the product was work-hardened by cold working, making it difficult to determine the pressing force for performing the next straightening. The process takes an enormous amount of time, and productivity is significantly reduced.
【０００８】このように、全体的に矯正時間が長いうえ
に、製品一つ一つの矯正時間に大きなばらつきがある。
この結果、生産性が低く、また連続工程での処理に不向
きとなっている。また、このような、冷間加工による変
形矯正を自動で行なう装置もあるが、長い矯正時間及び
矯正時間のばらつき発生は解消されない。As described above, the correction time is long as a whole, and the correction time of each product varies greatly.
As a result, productivity is low, and it is not suitable for processing in a continuous process. Further, there is an apparatus for automatically performing such deformation correction by cold working, but a long correction time and a variation in the correction time are not eliminated.
【０００９】さらに、変形量の大きな品物は、矯正のた
めの繰り返し加圧による割れが発生するおそれもある。
また、冷間で変形方向と逆方向に塑性変形が起こるまで
加圧し続けるため、膨大な加圧力が必要となり、装置が
大掛かりになってしまう等の問題点もある。Further, an article having a large amount of deformation may be cracked by repeated pressurization for correction.
Further, since the pressing is continued until the plastic deformation occurs in the direction opposite to the deformation direction in the cold, an enormous pressing force is required, and there is a problem that the apparatus becomes large-sized.
【００１０】本発明は、このような問題点に着目してな
されたもので、比較的単純な手段で、十分な矯正力を短
時間に安定して処理できる矯正方法を提供することを課
題としている。The present invention has been made in view of such problems, and has as its object to provide a correction method capable of stably processing a sufficient correction force in a short time by relatively simple means. I have.
【００１１】[0011]
【課題を解決するための手段】上記課題を解決するため
に、本発明の長尺部材の変形矯正方法は、硬化熱処理を
した鋼製の長尺部材に生じている変形を矯正する方法で
あって、上記長尺部材を、長手方向に引張応力を加えた
状態で焼戻し処理を行うことにより矯正することを特徴
としている。In order to solve the above-mentioned problems, a method for correcting deformation of a long member according to the present invention is a method for correcting deformation occurring in a long member made of steel which has been subjected to hardening heat treatment. The elongate member is corrected by performing a tempering process in a state where a tensile stress is applied in a longitudinal direction.
【００１２】本発明者らは、高強度な鋼に対し引張応力
を加えた状態で焼戻しを行うと、鋼の塑性変形による矯
正効果が高くなることを発見した。これに基づき、本発
明によれば、硬化熱処理されて硬く高強度な鋼を、その
組織が焼戻しする過程、あるいは残留オーステナイトが
焼戻しで変態する過程で現れる塑性を利用することで、
小さな加工応力で容易に長尺部材に生じている変形を矯
正するものである。The present inventors have discovered that when tempering high-strength steel in a state where tensile stress is applied, the effect of correcting the plastic deformation of the steel increases. Based on this, according to the present invention, a hard high-strength steel that has been subjected to hardening heat treatment, by utilizing the plasticity that appears during the process of tempering its structure or the process of transforming residual austenite by tempering,
This is to easily correct the deformation occurring in the long member with a small processing stress.
【００１３】即ち、引張応力を加えた状態にすること
で、部材の反り・曲がりやねじれを直線状となるように
弾性変形させ、その状態で焼戻し処理を行うことで塑性
変形して、長尺部材の真直度が向上すると共に焼戻し効
果が生じる。That is, by applying a tensile stress, the member is elastically deformed such that the warp, bend or torsion becomes linear, and is subjected to a tempering treatment in that state to be plastically deformed and to be elongated. The straightness of the member is improved and a tempering effect is generated.
【００１４】この方法では、冷間で変形方向と逆方向に
塑性変形が起こるまで繰り返し加圧し続ける独立した工
程が不要となり、焼戻し工程時に安定した矯正効果が得
られる。また、従来法に比べ棒状や柱状の製品を矯正す
るために負荷する加圧力が低くいので、装置も比較的単
純化が可能となり、生産性が大幅に向上する。According to this method, an independent step of repeatedly applying pressure until cold plastic deformation occurs in the direction opposite to the deformation direction becomes unnecessary, and a stable correction effect can be obtained during the tempering step. Further, since the pressing force applied to straighten a bar-shaped or column-shaped product is lower than that of the conventional method, the apparatus can be relatively simplified, and the productivity is greatly improved.
【００１５】このとき、上記焼戻し処理は、高周波誘導
加熱によって加熱手段を構成し、その加熱手段を、対象
とする長尺部材に対して該長尺部材の長手方向に沿って
相対移動させることで実施するとよい。At this time, in the tempering process, the heating means is constituted by high-frequency induction heating, and the heating means is moved relative to the target long member along the longitudinal direction of the long member. It is good practice.
【００１６】このように、加熱手段として高周波誘導加
熱を採用することで、連続的に且つ短時間で焼戻し処理
ができる。即ち、高周波誘導加熱を利用した加熱手段
を、相対的に、長尺部材の長手方向に沿って移動させる
ことで、連続的且つ短時間で焼戻し処理が行われ、矯正
効果及び焼戻し効果が同時に得られる。しかも、この方
法では、一回の工程で安定した矯正効果が得られる。As described above, by employing high-frequency induction heating as the heating means, tempering can be performed continuously and in a short time. That is, by relatively moving the heating means using high-frequency induction heating along the longitudinal direction of the long member, the tempering process is performed continuously and in a short time, and the correcting effect and the tempering effect are simultaneously obtained. Can be Moreover, in this method, a stable correction effect can be obtained in one step.
【００１７】ここで、棒状や柱状部材からなる高強度な
精密機械部品の硬化熱処理方法としては、高周波焼入れ
処理を行なう場合が多く、その後、連続して高周波焼戻
しを行う場合がほとんどである。そして、本矯正法を適
用すると焼戻し処理と変形矯正が同時に得られ、しか
も、硬化熱処理工程とのライン化が可能であり、連続処
理対応に好適である。また、本方法に基づく装置は、長
尺部材の寸法許容差が広く装置の汎用性が十分広くな
る。Here, as a method of hardening heat treatment of high-strength precision mechanical parts composed of rod-shaped or column-shaped members, induction hardening is often performed, and subsequently, induction hardening is continuously performed in most cases. When this straightening method is applied, tempering treatment and deformation correction can be obtained at the same time, and a line with the hardening heat treatment step is possible, which is suitable for continuous processing. Further, the apparatus based on the present method has a wide dimensional tolerance of the long member, and the versatility of the apparatus is sufficiently wide.
【００１８】また、焼戻し処理時の長尺部材の表面最高
温度は、２００〜５００℃、好ましくは２５０〜５００
℃に設定すると良い。２００℃未満に設定すると、焼戻
しによる塑性変形が不安定となり、矯正効果が小さいた
めであり、好ましくは２５０℃以上としたのは、２５０
℃以上で焼戻しによる塑性変形が安定するためである。
また、５００℃を越えると、長尺部材の表面硬度が不足
してＨＲＣ５８（Ｈｖ６５８）未満となるためである
（表１参照）。The maximum surface temperature of the long member during the tempering process is 200 to 500 ° C., preferably 250 to 500 ° C.
Set to ° C. If the temperature is set to less than 200 ° C., the plastic deformation due to tempering becomes unstable, and the correction effect is small.
This is because plastic deformation due to tempering is stabilized at a temperature of not less than ℃.
On the other hand, if the temperature exceeds 500 ° C., the surface hardness of the long member becomes insufficient and becomes lower than HRC58 (Hv658) (see Table 1).
【００１９】また、長尺部材に加える引張応力は、１０
〜４０ＭＰａ、好ましくは３０〜４０ＭＰａに設定する
と良いが、わずかな引張応力でも大きな矯正効果がある
ので、目標とする真直度に応じ、１０ＭＰａ未満でも適
宜選択できる。The tensile stress applied to the long member is 10
Although it is good to set it to -40 MPa, preferably 30-40 MPa, even a small tensile stress has a large correcting effect, so that it can be appropriately selected even if less than 10 MPa according to the target straightness.
【００２０】ここで、１０ＭＰａで０ＭＰａ（引張応力
がない状態での焼戻し）の場合の半分以下に矯正でき
る。また、３０ＭＰａ以上で矯正効果が安定するためで
あり、また、４０ＭＰａ以上では、効果がほぼ飽和する
ためである（図４参照）。もっとも、引張応力の上限値
は長尺部材の素材の硬度を越えると長手方向に伸びてし
まうので、長尺部材の素材の硬度以下に抑える方が良
い。Here, it can be corrected to less than half of 10 MPa at 0 MPa (tempering without tensile stress). Further, the correction effect is stabilized at 30 MPa or more, and the effect is almost saturated at 40 MPa or more (see FIG. 4). However, if the upper limit of the tensile stress exceeds the hardness of the material of the long member, the tensile stress will be elongated in the longitudinal direction.
【００２１】また、本発明の長尺部材の変形矯正方法に
使用される装置は、例えば、長尺部材の両端を把持する
把持手段と、長尺部材の把持された両端部の間に引張荷
重を負荷する負荷手段と、長尺部材の把持された両端部
の間の部分を所定温度に加熱し焼戻しを行う焼戻し手段
と、を備えることで実現される。このとき、上述のよう
に高周波誘導加熱により加熱手段を構成し、この加熱手
段を長尺部材に沿って相対移動させる移動機構とによっ
て焼戻し手段を構成するとよい。Further, the apparatus used in the method for correcting deformation of a long member according to the present invention includes, for example, a holding means for holding both ends of the long member, and a tensile load between both ends of the long member. And tempering means for heating a portion between both gripped end portions of the long member to a predetermined temperature to perform tempering. At this time, as described above, the heating means may be constituted by high-frequency induction heating, and the tempering means may be constituted by a moving mechanism for relatively moving the heating means along the elongated member.
【００２２】また、上述のように、加熱手段として高周
波誘導加熱方式を採用すると、前工程である硬化熱処理
及び後工程である仕上成形工程との連続化（ライン化）
が可能となるので、転動部品からなる長尺部材は、荒加
工→硬化熱処理→上記変形矯正→仕上圧延との各工程を
連続的に行うことで製造できる。As described above, when the high-frequency induction heating method is adopted as the heating means, continuity (line formation) with the curing heat treatment which is the preceding step and the finish forming step which is the subsequent step is achieved.
Therefore, a long member composed of rolling parts can be manufactured by successively performing each of the steps of roughing, hardening heat treatment, deformation correction, and finish rolling.
【００２３】[0023]
【発明の実施の形態】次に、本発明の第１の実施の形態
について図面を参照しつつ説明する。この第１の実施形
態は、長尺部材に対し加熱手段側を移動させて焼戻し処
理を行う方式のものである。Next, a first embodiment of the present invention will be described with reference to the drawings. In the first embodiment, a tempering process is performed by moving a heating means side to a long member.
【００２４】まず、本発明に使用される変形矯正装置の
構成について説明すると、図１（ｂ）に示す概略図のよ
うに、焼戻し手段と、把持手段と、負荷手段とを備え、
上記焼戻し手段は、加熱手段と、移動機構とから構成さ
れる。First, the configuration of the deformation correcting device used in the present invention will be described. As shown in a schematic diagram of FIG. 1B, the device includes a tempering means, a gripping means, and a load means.
The tempering means includes a heating means and a moving mechanism.
【００２５】加熱手段は、高周波誘導加熱用の高周波誘
導加熱コイル装置１であって、図示しない公知の移動機
構によって長尺部材２の長手方向に平行移動するように
なっている。その高周波誘導加熱コイル装置１のコイル
部１ａは、対象とする長尺部材２のサイズや焼戻し条件
によって、交換可能となっている。なお、上記移動機構
とは、例えば、長尺部材２に沿って平行に伸びる案内部
と、その案内部に規制されて上記高周波誘導加熱コイル
装置１のコイル部１ａを当該案内部材に沿って移動する
駆動部とから構成される。The heating means is a high-frequency induction heating coil device 1 for high-frequency induction heating, and is adapted to move in parallel in the longitudinal direction of the long member 2 by a known moving mechanism (not shown). The coil portion 1a of the high-frequency induction heating coil device 1 can be replaced depending on the size of the target long member 2 and tempering conditions. The moving mechanism includes, for example, a guide portion extending in parallel along the long member 2 and the coil portion 1a of the high-frequency induction heating coil device 1 being regulated by the guide portion and moving along the guide member. And a driving unit that performs the driving.
【００２６】また、把持手段は、長尺部材２の両端部２
ａ，２ｂをそれぞれ固定する一対のクランプ装置３，４
から構成される。各クランプ装置３，４は、長尺部材２
の端部を把持するチャック３ａ，４ａと、そのチャック
３ａ，４ａを支持すると共に長尺部材２を軸方向に通過
させる通過穴３ｃ，４ｃが開設されたクランプ装置本体
３ｂ，４ｂとから構成される。Further, the gripping means includes both ends 2 of the long member 2.
A pair of clamping devices 3 and 4 for fixing a and 2b respectively
Consists of Each of the clamping devices 3 and 4 includes a long member 2
Chucks 3a and 4a for gripping the end portions, and clamp device main bodies 3b and 4b which support the chucks 3a and 4a and have opening holes 3c and 4c for passing the elongated member 2 in the axial direction. You.
【００２７】ここで、各クランプ装置３，４には、長尺
部材２を把持した後に引張力Ｐが負荷されるので、確実
に把持するため、各チャック３ａ，４ａが長尺部材２の
端部２ａ，２ｂを相当量噛み込む様な構造になってい
て、同時に、相当量の長尺部材２の端部２ａ，２ｂを噛
み込み把持・固定するだけで長尺部材２の曲がり変形を
ある程度修正可能となっている。チャック力Ｐ′は機械
的締め込みでも良いし、更に大型品では油圧等を用いて
負荷してもよい。Here, since a tensile force P is applied to each of the clamping devices 3 and 4 after gripping the long member 2, each chuck 3a, 4a is connected to the end of the long member 2 in order to securely grip. The portion 2a, 2b is structured to be bitten by a considerable amount, and at the same time, the bending deformation of the long member 2 is reduced to a certain extent only by gripping and fixing the ends 2a, 2b of the long member 2 to a considerable amount. It can be modified. The chucking force P 'may be mechanically tightened, or may be applied using a hydraulic pressure or the like for a large product.
【００２８】一方のクランプ装置本体３ｂは固定されて
いるが、他方のクランプ装置本体４ｂは、当該一方のク
ランプ装置本体３ｂに対し長尺部材２の長手方向に移動
可能となっている。One clamp device main body 3b is fixed, while the other clamp device main body 4b is movable in the longitudinal direction of the long member 2 with respect to the one clamp device main body 3b.
【００２９】また、上記一対のクランプ装置本体３ｂ，
４ｂは、図２に示す概略平面図のように、負荷手段５を
構成する一対の駆動ねじ５ａによって連結され、当該一
対の駆動ねじ５ａは、駆動モータ５ｂを駆動することで
同期をとって正逆回転することで、固定側のクランプ装
置３に対し可動側のクランプ装置４を進退させ、もっ
て、一対のクランプ装置３，４によって把持された長尺
部材２に所定の引張力が長手方向に付与されるようにな
っている。該負荷手段５は、コントローラ６からの信号
に基づき駆動する。なお、負荷手段５は、上記構成に限
定されず、油圧シリンダ装置等の駆動装置によって構成
してもよい。Further, the pair of clamping device bodies 3b,
4b, as shown in the schematic plan view of FIG. 2, is connected by a pair of driving screws 5a constituting the load means 5, and the pair of driving screws 5a are synchronized with each other by driving the driving motor 5b. The reverse rotation causes the movable-side clamp device 4 to advance and retreat with respect to the fixed-side clamp device 3, so that a predetermined tensile force is applied to the long member 2 gripped by the pair of clamp devices 3 and 4 in the longitudinal direction. Is to be granted. The load means 5 is driven based on a signal from the controller 6. Note that the load unit 5 is not limited to the above configuration, and may be configured by a drive device such as a hydraulic cylinder device.
【００３０】また、簡易な真直度測定機７を備える（図
１（ｂ）参照）。真直度測定機７は、クランプ装置３，
４で把持された長尺部材２の長手方向に沿った真直度を
測定する機械であって、当該長手方向に沿って配列し上
方に付勢された複数の測定子７ａを長尺部材２の下面に
当接し、その各測定子７ａの上下変位量や圧力等によっ
て長尺部材２の真直度を測定し、これによって、その真
直度に応じた真直度信号をコントローラ６に供給可能と
なっている。なお、この真直度測定機７は、矯正前、引
張応力の付与時、及び矯正終了後の真直度を簡易的に測
定する際に使用され、測定結果によって矯正温度や引張
応力の設定及び矯正効果の確認が迅速に判定できる。な
お、長尺部材がボールねじのねじ軸等のねじ部品の場合
には、溝基準で真直度を測定するとよい。Further, a simple straightness measuring device 7 is provided (see FIG. 1B). Straightness measuring device 7 includes clamping devices 3
4 is a machine for measuring straightness along the longitudinal direction of the long member 2 gripped by 4, and comprises a plurality of measuring elements 7a arranged along the longitudinal direction and urged upward. The straightness of the long member 2 is measured by the vertical displacement amount, pressure, etc. of each of the tracing styluses 7a, whereby a straightness signal corresponding to the straightness can be supplied to the controller 6. I have. The straightness measuring device 7 is used before straightening, when applying tensile stress, and when simply measuring straightness after completion of straightening. Depending on the measurement result, setting of straightening temperature and tensile stress and straightening effect are performed. Confirmation can be determined quickly. When the long member is a screw part such as a screw shaft of a ball screw, the straightness may be measured based on the groove.
【００３１】コントローラ６は、図示しない応力センサ
からの信号に基づき、長尺部材２に付与されている引張
応力が所定の応力となるように負荷手段５の駆動ねじ５
ａを回転駆動すると共に、真直度測定機７からの真直度
の信号に基づき上記付与する引張応力を補正する。The controller 6 controls the driving screw 5 of the loading means 5 based on a signal from a stress sensor (not shown) so that the tensile stress applied to the long member 2 becomes a predetermined stress.
a is rotated, and the applied tensile stress is corrected based on the straightness signal from the straightness measuring device 7.
【００３２】次に、上記装置を使用した長尺部材２の変
形矯正方法について、上記図１を参照しつつ説明する。
硬化熱処理を施し変形した長尺部材２を、図１（ａ）に
示すように、可動側のクランプ装置４の通過穴４ｃに通
し、その先端部２ａを、固定側のクランプ装置３のチャ
ック３ａで把持・固定すると共に、可動側のクランプ装
置４によって長尺部材２の後端部２ｂを把持する。Next, a method of correcting the deformation of the long member 2 using the above-described apparatus will be described with reference to FIG.
As shown in FIG. 1A, the elongated member 2 that has been subjected to the hardening heat treatment is passed through a passage hole 4c of a movable-side clamp device 4 and its tip 2a is attached to a chuck 3a of a fixed-side clamp device 3 as shown in FIG. And the rear end 2b of the long member 2 is gripped by the clamp device 4 on the movable side.
【００３３】ここで、上記取付け時には、例えば、不図
示のローディング装置により図１（ａ）右方から通過穴
４ｃを通し、まず先端部２ａ及びコイル部１ａの幅の和
に相当する長さより長くチャック４ａから左側に突出さ
せた状態で仮にチャックをクランプさせて上記長尺部材
２の先端部２ａを固定側のクランプ装置３側に案内する
ように、一旦，可動側のクランプ装置４を固定側に近づ
け長尺部材２の先端部２ａがクランプ３ａにより固定さ
れたのちにクランプ４ａを解除し、当該可動側のクラン
プ装置４を後退させて長尺部材２の後端部２ｂをクラン
プ４ａにより把持するようにするとよい。Here, at the time of the above attachment, for example, a loading device (not shown) is used to pass through the passage hole 4c from the right side of FIG. 1 (a), and is longer than the length corresponding to the sum of the widths of the tip 2a and the coil 1a. The movable clamp device 4 is temporarily fixed to the fixed side so that the distal end portion 2a of the long member 2 is guided to the fixed clamp device 3 side while the chuck is temporarily clamped while being protruded to the left from the chuck 4a. After the distal end 2a of the long member 2 is fixed by the clamp 3a, the clamp 4a is released, the movable side clamp device 4 is retracted, and the rear end 2b of the long member 2 is gripped by the clamp 4a. It is better to do it.
【００３４】このように、一対のクランプ装置３，４に
よって、長手部材２の両端部２ａ，２ｂが同軸に把持さ
れることで、長尺部材２に生じている大きな反りは解消
される。As described above, the pair of clamp devices 3 and 4 coaxially grip the two end portions 2a and 2b of the elongated member 2, so that the large warpage generated in the elongated member 2 is eliminated.
【００３５】次に、負荷手段５を駆動し、図１（ｂ）に
示すように、可動側のクランプ装置４を固定側のクラン
プ装置３から離れる方向に移動させることで、長尺部材
２に適当な引張力Ｐを付与する。Next, as shown in FIG. 1B, the load means 5 is driven to move the movable clamp device 4 in a direction away from the fixed clamp device 3 so that the long member 2 can be moved. An appropriate tensile force P is applied.
【００３６】このとき、真直度測定機７により長尺部材
２の真直度を測定し、その真直度に基づき、所定範囲の
所望の真直度となるように、負荷手段５によって長尺部
材２に付与する引張力Ｐを微調整する。At this time, the straightness of the long member 2 is measured by the straightness measuring device 7, and based on the straightness, the long member 2 is applied to the long member 2 by the load means 5 so as to have a desired straightness within a predetermined range. Fine adjustment of the applied tensile force P.
【００３７】この状態は、クランプ装置３，４の把持力
と引張力によって、長尺部材２の曲がりを弾性変形させ
た状態であり、把持を開放すれば元の変形状態に戻る。
次に、図１（ｃ）に示すように、移動式の高周波加熱コ
イル装置１のコイル部１ａに電流を印加させた状態で、
長尺部材２の長手方向に沿って一端部２ａ側から他端部
２ｂ側に移動させることで、相対的にコイル部１ａ内に
長尺部材２を一回だけ通過させ、目的に応じた温度で連
続的に焼戻し矯正処理を行う。This state is a state in which the bending of the long member 2 is elastically deformed by the gripping force and the pulling force of the clamp devices 3 and 4, and returns to the original deformed state when the grip is released.
Next, as shown in FIG. 1C, in a state where a current is applied to the coil portion 1a of the movable high-frequency heating coil device 1,
By moving the elongate member 2 from the one end 2a side to the other end 2b side along the longitudinal direction of the elongate member 2, the elongate member 2 relatively passes through the coil portion 1a only once, and the temperature according to the purpose is increased. To perform a tempering straightening process continuously.
【００３８】このとき、加熱温度は高いほど矯正効果が
向上する。そして、焼戻しの進行に伴い、弾性変形状態
が、組織変化によって自然に塑性変形状態に移り変わ
り、矯正効果が得られる。At this time, the higher the heating temperature, the better the correction effect. Then, with the progress of tempering, the elastic deformation state naturally changes to a plastic deformation state due to a structural change, and a correction effect is obtained.
【００３９】次に、上記変形矯正が終了したら、固定側
のクランプ装置３の通過穴３ｃから次の工程である仕上
成形工程に長尺部材２を搬出する。ここで、上記処理の
みでは、長尺部材２の端部である把持されている部分２
ａ，２ｂ及びその近辺は加熱量が少なく、焼戻し不足に
なってしまうおそれがある。Next, when the above-mentioned deformation correction is completed, the long member 2 is carried out from the passage hole 3c of the clamp device 3 on the fixed side to a finish forming step which is the next step. Here, in the above processing alone, the gripped portion 2 which is the end of the long member 2
The heating amounts of a and 2b and the vicinity thereof are small, and the tempering may be insufficient.
【００４０】これを回避する必要がある場合には、図１
（ｄ）の左側に示すように、上記焼戻し矯正処理が終了
し長尺部材２を固定側の通過穴３ｃを通して搬出する途
中で、長尺部材２の後端部２ｂ側の部分（可動側のクラ
ンプ装置４で把持していた部分及びその近傍）を残し
て、一旦固定側のクランプ装置３で把持させ、その後端
部２ｂ側を高周波加熱コイル装置１で加熱して焼戻しを
行う。また、図１（ｄ）の右側に示すように、長手部材
の先端部２ａ側は、上記矯正処理を行うために、可動側
のクランプ装置４の通過穴４ｃを通した際に、当該先端
部２ａ側部分だけが可動側のクランプ装置４から突出し
た状態で一旦把持させて、その先端部２ａを高周波加熱
コイル装置１で加熱して焼戻しを行ってから、上述の矯
正処理を行う。When it is necessary to avoid this, FIG.
As shown on the left side of (d), when the tempering correction process is completed and the long member 2 is being carried out through the fixed-side passage hole 3c, a portion on the rear end 2b side of the long member 2 (movable side The portion that has been gripped by the clamp device 4 and the vicinity thereof is left, and is temporarily gripped by the clamp device 3 on the fixed side, and the rear end 2b side is heated by the high-frequency heating coil device 1 to perform tempering. In addition, as shown on the right side of FIG. 1D, when the distal end portion 2a side of the longitudinal member passes through the passage hole 4c of the movable-side clamp device 4 in order to perform the correction process, the distal end portion 2a side Only the 2a side portion is once gripped in a state protruding from the movable side clamp device 4, and the tip portion 2a is heated by the high frequency heating coil device 1 to perform tempering, and then the above-described straightening process is performed.
【００４１】この際、加熱する境目部分は上述の矯正時
の加熱部分とオーバラップするようにする。但し、レー
ルの端の方は熱処理不要な場合もあり、その場合には、
この工程は必要ない。例えば、ボールねじのねじ軸の場
合には、通常ねじ軸両端部には追加工を行う必要がある
ため端部の硬化処理を必要としない。At this time, the boundary portion to be heated is overlapped with the above-described heating portion at the time of correction. However, heat treatment may not be required at the end of the rail, in which case,
This step is not required. For example, in the case of a screw shaft of a ball screw, it is usually necessary to perform additional processing on both ends of the screw shaft, so that hardening of the ends is not required.
【００４２】なお、上記移動式の高周波加熱コイル装置
１に、コイル部１ａと共に動く矯正ロール（次に述べる
長尺部材移動式のもの（図３中１１の部品））をコイル
部１ａと共に移動するように組合せ、引張と曲げ矯正用
の加圧を組み合わせるようにしてもよい。この場合に
は、加工部は焼戻し温度に加熱されているので曲げ荷重
が小さくて済む。さらに、この組合せにより変形率をさ
らに向上できる。つまり、矯正ロールには大きな負荷を
加えることなく、より高精度の矯正が可能となる。In the movable high-frequency heating coil device 1, a straightening roll (a long member movable type described below (11 in FIG. 3)) that moves together with the coil unit 1a is moved together with the coil unit 1a. In this way, the tension and the pressure for bending correction may be combined. In this case, since the processed portion is heated to the tempering temperature, the bending load can be small. Furthermore, the deformation ratio can be further improved by this combination. That is, it is possible to perform the correction with higher accuracy without applying a large load to the correction roll.
【００４３】また、長尺部材２の断面に対して長さが著
しく長く、両端部を把持して引張しても自重で撓んでし
まう場合には、可動側のクランプ装置４で長尺部材２の
途中を一旦把持させて、当該区画について一旦，上記矯
正処理を行った後に、当該長尺部材２を途中まで送っ
て、残りの部分の矯正処理を行う等、長手方向を複数の
区画に分けて順番に処理するようにすればよい。In the case where the length of the long member 2 is extremely long with respect to the cross section of the long member 2 and the two ends are bent by its own weight even if the two ends are gripped and pulled, the movable member clamp device 4 is used. Is divided into a plurality of sections, for example, by once grasping the middle of the section and once performing the above-described correction processing on the section, then feeding the long member 2 halfway and performing the correction processing on the remaining portion. Process in order.
【００４４】次に、第２の実施の形態について図面を参
照しつつ説明する。なお、上記第１の実施の形態と同様
な部材には、同一の符号を付して説明する。この第２実
施形態は、加熱の際に長尺部材２側を移動させる方式で
ある。Next, a second embodiment will be described with reference to the drawings. The same members as those in the first embodiment are denoted by the same reference numerals and described. The second embodiment is a method in which the long member 2 is moved during heating.
【００４５】この変形矯正装置の構成について説明する
と、図３に示すように、焼戻し手段と、把持手段と、負
荷手段とを備える。加熱手段は、高周波誘導加熱用の高
周波誘導加熱コイル装置１であるが、第１実施形態とは
異なり固定式のものである。コイル部１ａは長尺部材２
のサイズや焼戻し条件によって、交換可能となってい
る。The structure of the deformation correcting device will be described. As shown in FIG. 3, the device comprises a tempering means, a gripping means, and a load means. The heating means is the high-frequency induction heating coil device 1 for high-frequency induction heating, but is of a fixed type unlike the first embodiment. The coil part 1a is a long member 2
It can be replaced depending on the size and tempering conditions.
【００４６】また、把持手段は、長尺部材２の両端部を
それぞれ固定する一対のクランプ装置３，４から構成さ
れる。各クランプ装置３，４は、長尺部材２の端部を把
持するチャック３ａ，４ａと、そのチャック３ａ，４ａ
を支持すると共に長尺部材２を軸方向に通過させる通過
穴３ｃ，４ｃが開設されたクランプ装置本体３ｂ，４ｂ
とから構成されている。The holding means comprises a pair of clamping devices 3 and 4 for fixing both ends of the long member 2 respectively. Each of the clamping devices 3 and 4 includes chucks 3a and 4a for gripping an end of the long member 2, and the chucks 3a and 4a.
Main body 3b, 4b having through holes 3c, 4c for supporting the member and passing the long member 2 in the axial direction.
It is composed of
【００４７】ここで、各クランプ装置３，４には、長尺
部材２を把持した後に引張力Ｐが負荷されるので、確実
に把持するため、各チャック３ａ，４ａが長尺部材２の
端部を相当量噛み込む様な構造になっていて、同時に、
長尺部材２の相当量の端部２ａ，２ｂ部分を噛み込み把
持・固定するだけで長尺部材２の曲がり変形をある程度
修正可能となっている。チャック力は機械的締め込みで
も良いし、更に大型品では油圧等を用いて負荷してもよ
い。Here, since a tensile force P is applied to each of the clamping devices 3 and 4 after gripping the elongated member 2, each chuck 3a, 4a is connected to the end of the elongated member 2 in order to securely grip the elongated member 2. It is structured to bite the part considerably, and at the same time,
The bending deformation of the long member 2 can be corrected to some extent only by biting and holding and fixing a considerable amount of the end portions 2a and 2b of the long member 2. The chucking force may be mechanical tightening, or may be applied using a hydraulic pressure or the like for a large product.
【００４８】一方のクランプ装置本体３ｂは設置台１０
に固定されているが、他方のクランプ装置本体４ｂは、
その設置台１０上を長尺部材２の長手方向に移動可能と
なっている。One main body 3b of the clamping device is
, But the other clamp device main body 4b is
The elongate member 2 is movable on the installation table 10 in the longitudinal direction.
【００４９】また、上記一対のクランプ装置本体３ｂ，
４ｂは、第１実施形態と同様に、負荷手段を構成する一
対の駆動ねじによって連結され、当該一対の駆動ねじ
は、駆動モータを駆動することで同期をとって正逆回転
し、固定側のクランプ装置３，４に対し可動側のクラン
プ装置４が進退し、もって、一対のクランプ装置３，４
によって把持された長尺部材２に引張力が付与されるよ
うになっている。負荷手段は、上記構成に限定されず、
油圧シリンダ装置等の駆動装置によって構成してもよ
い。Further, the pair of clamping device main bodies 3b,
4b, similarly to the first embodiment, are connected by a pair of drive screws constituting a load means, and the pair of drive screws rotate forward and reverse synchronously by driving a drive motor, and rotate on the fixed side. The movable clamp device 4 advances and retreats with respect to the clamp devices 3 and 4, so that the pair of clamp devices 3 and 4
Thus, a tensile force is applied to the long member 2 gripped. The load means is not limited to the above configuration,
It may be constituted by a drive device such as a hydraulic cylinder device.
【００５０】また、設置台１０も長尺部材２の長手方向
に移動可能となっていて、当該設置台１０を移動させる
ことで、一対のクランプ装置３，４に把持された長尺部
材２が加熱手段に対し長手方向へ移動可能となってい
る。The mounting table 10 is also movable in the longitudinal direction of the long member 2, and by moving the mounting table 10, the long member 2 gripped by the pair of clamp devices 3 and 4 is moved. It is movable in the longitudinal direction with respect to the heating means.
【００５１】また、上記高周波誘導加熱コイル装置１の
コイル部１ａの両側には、それぞれ矯正ロール１１が設
置されている。各矯正ロール１１は、支持部先端に回転
可能に支持された円筒状のロールを備える。そして、長
尺部材２を上下から油圧シリンダ１２ａを介して挟み込
んで所定の圧力を付与する上下矯正用ロール１１ａと、
これと同じ構成で長尺部材２を左右から油圧シリンダ
（不図示）を介して挟み込んで所定の圧力を付与する左
右矯正用ロール１１ｂと、から構成されて、長尺部材２
断面に対して上下左右から圧力を掛けて曲げ矯正する構
造になっている。[0051] Straightening rolls 11 are provided on both sides of the coil portion 1a of the high-frequency induction heating coil device 1, respectively. Each straightening roll 11 includes a cylindrical roll rotatably supported at the tip of the support portion. And a vertical correction roll 11a for sandwiching the long member 2 from above and below via a hydraulic cylinder 12a and applying a predetermined pressure;
A left-right correction roll 11b for applying a predetermined pressure by sandwiching the long member 2 from the left and right via a hydraulic cylinder (not shown) with the same configuration.
The structure is such that bending is corrected by applying pressure to the cross section from up, down, left and right.
【００５２】次に、本装置を使用した変形矯正方法を説
明する。前工程で硬化熱処理を施し変形した長尺部材２
を、上記第１実施形態と同様に、移動側のクランプの通
過穴４ｃから挿入して、一対のクランプ装置３，４でそ
の長尺部材２の両端部２ａ，２ｂを把持し、負荷手段５
によって長尺部材２に所望の引張力Ｐを付与する。Next, a method for correcting deformation using the present apparatus will be described. A long member 2 that has been subjected to hardening heat treatment in the previous process and deformed
Is inserted through the passage hole 4c of the clamp on the moving side in the same manner as in the first embodiment, and the two end portions 2a, 2b of the long member 2 are gripped by the pair of clamp devices 3, 4, and the load means 5
Thus, a desired tensile force P is applied to the long member 2.
【００５３】このように、一対のクランプ装置３，４に
よって、その両端部が同軸に把持されることで、長尺部
材２に生じている大きな反りは解消される。また、引張
力Ｐを付与した状態は、クランプ装置３，４の把持力と
引張力によって、長尺部材２の曲がりを弾性変形させた
状態であり、把持を開放すれば元の変形状態に戻る。As described above, since the two ends are coaxially gripped by the pair of clamp devices 3 and 4, the large warpage generated in the long member 2 is eliminated. The state where the tensile force P is applied is a state in which the bending of the long member 2 is elastically deformed by the gripping force and the tensile force of the clamp devices 3 and 4, and returns to the original deformed state when the grip is released. .
【００５４】この状態では、高周波誘導加熱コイル装置
１のコイル部１ａ側が固定側のクランプ装置３，４いず
れかの側に位置するように設定する。次に、高周波誘導
加熱コイル装置１を作動させて加熱状態にすると共に、
その両側にある各矯正ロール１１で長尺部材２を左右上
下から曲げ矯正用の加圧をしながら、設置台１０を長尺
部材２の長手方向に移動させ、長尺部材２をコイル部１
ａに対し所定速度で移動させる。In this state, the coil portion 1a of the high-frequency induction heating coil device 1 is set so as to be located on one of the fixed clamping devices 3 and 4. Next, the high-frequency induction heating coil device 1 is operated to be in a heating state,
The mounting table 10 is moved in the longitudinal direction of the long member 2 while the long member 2 is pressed from right, left, up and down by the straightening rolls 11 on both sides thereof to correct the bending.
a is moved at a predetermined speed with respect to a.
【００５５】これによって、長尺部材２は、長手方向に
沿って引張された状態で該長手方向に連続的に焼戻し処
理が行われると共に、加熱された部分が矯正ロール１１
で加圧されて矯正される。即ち、設置台１０が移動する
ことで、焼戻しと矯正とが同時に行われる。Thus, the elongate member 2 is continuously tempered in the longitudinal direction in a state where the elongate member 2 is pulled in the longitudinal direction.
Is pressurized and corrected. That is, by moving the installation table 10, tempering and correction are performed simultaneously.
【００５６】また、矯正ロール１１で加熱した部分を加
圧矯正するので、この矯正ロール１１の加圧力は常温時
で行うよりも小さくて済む。これは、装置の小型化に繋
がる。Further, since the portion heated by the straightening roll 11 is straightened under pressure, the pressing force of the straightening roll 11 can be smaller than that at normal temperature. This leads to downsizing of the device.
【００５７】また、本発明では、適当な引張応力を掛け
ながら行うことが特徴で、これによって真直度が著しく
向上する。また特に、長尺部材２が断面積に対して長さ
が著しく長く、両側から引張しても自重でたわんでしま
うような場合は、第１実施形態のコイル移動式では自重
によるたわみを直すのに莫大な引張荷重が必要となった
り、複数の区画に分割して処理を行う必要があるが、本
実施の形態の処理方式では、そのような欠点がなく、長
尺部材２が所定以上の長さを有する場合には、長尺部材
２を移動する本実施形態の方法が有効である。Further, the present invention is characterized in that the treatment is performed while applying an appropriate tensile stress, thereby significantly improving the straightness. In particular, in the case where the long member 2 is extremely long with respect to the cross-sectional area and warps under its own weight even when pulled from both sides, the deflection due to its own weight is corrected in the coil moving type of the first embodiment. Requires an enormous tensile load, or it is necessary to divide the processing into a plurality of sections, but the processing method of the present embodiment does not have such a drawback, and the long member 2 has a predetermined size or more. When it has a length, the method of the present embodiment for moving the long member 2 is effective.
【００５８】ただし、コイル移動式と同様に、把持され
た部分２ａ，２ｂ及びその近傍については、必要に応じ
て、先端部２ａは最初に、後端部２ｂは最後に、引張応
力が掛からない状態で焼戻しを行う。However, as in the case of the coil moving type, as to the gripped portions 2a and 2b and the vicinity thereof, if necessary, the tip 2a is applied first, the rear end 2b is applied last, and no tensile stress is applied. Tempering is performed in the state.
【００５９】ここで、本発明の変形矯正方法は、例え
ば、焼入れ硬化させる部品に関する、例えば軸受鋼や工
具鋼やばね鋼を焼入れ処理した部品や、炭素鋼やそれに
準ずるものを高周波焼入れした部品、また肌焼き鋼や中
炭素鋼に浸炭又は浸炭窒化処理した部品でも効果があ
る。つまり、硬化熱処理後の硬化部分がマルテンサイト
組織と一部残留オーステナイトとなる高強度部品の変形
矯正には、焼戻しする過程で現れる塑性を利用する本発
明による矯正法が有効となる。そして、これにより、矯
正に要する負荷は小さくて済み、装置の小型化が可能で
ある。Here, the deformation correction method of the present invention relates to, for example, a part which is quenched and hardened, for example, a part obtained by quenching bearing steel, tool steel, or spring steel, a part obtained by induction hardening carbon steel or a similar material, In addition, the present invention is also effective for parts obtained by carburizing or carbonitriding hardened steel or medium carbon steel. In other words, the straightening method according to the present invention, which utilizes the plasticity appearing during the tempering process, is effective for correcting the deformation of a high-strength component in which the hardened portion after the hardening heat treatment has a martensite structure and a part of retained austenite. Thus, the load required for the correction is small, and the apparatus can be downsized.
【００６０】また、本発明の矯正方法を採用すること
で、棒状や柱状部材を精密に仕上げる部品に関して、加
工コストが高い、硬化熱処理後の旋削や研削加工を大幅
に省力化することができる。In addition, by employing the straightening method of the present invention, turning and grinding after hardening heat treatment can be greatly saved for parts for precisely finishing rod-shaped or column-shaped members, which have high processing costs.
【００６１】また、上記実施の形態では、加熱手段とし
て高周波誘導加熱方式を利用しているが、熱風加熱方式
等の他の加熱方式を採用してもよい。但し、高周波誘導
加熱方式の方が短時間で且つ安定して加熱することがで
きる。In the above embodiment, the high-frequency induction heating system is used as the heating means, but another heating system such as a hot air heating system may be employed. However, the high-frequency induction heating method can stably heat in a shorter time.
【００６２】[0062]
【実施例】以下に、この発明の実施例を説明する。上記
第１の実施の形態で説明した構成と同様な装置を使用し
た、第１実施例の長尺部材２の変形矯正試験及びその結
果について説明する。Embodiments of the present invention will be described below. A description will now be given of a deformation correction test of the elongated member 2 of the first embodiment using the same device as the configuration described in the first embodiment, and a result thereof.
【００６３】ここで、試験条件は次の通りである。 ・試験片形状 ：リニアガイド用のレールであって、断
面積約３６０ｍｍ2 、長さ３０００ｍｍの柱状部材 ・材 質 ：Ｓ５８Ｃ ・硬化熱処理 ：高周波焼入れ ・矯正焼戻し条件（高周波焼戻し、コイル移動式） 周波数：１０ｋＨｚ コイル通過速度：８〜１２ｍｍ／ｓｅｃ なお、高周波焼入で被加熱部品を移動して焼入れる移動
焼入方式では、一般的な移動速度は８〜１２ｍｍ／ｓｅ
ｃであり、本発明の実施例では焼入工程との連続性（ラ
イン化）を考慮して、焼戻し時の移動速度も８〜１２ｍ
ｍ／ｓｅｃと設定している。Here, the test conditions are as follows. - specimen geometry: a rail for a linear guide, the cross-sectional area of about 360 mm 2, the columnar members, Material Length 3000 mm: S58C-hardening heat treatment: the high-frequency hardening and straightening tempering conditions (induction tempering, the coils mobile) Frequency : 10 kHz Coil passing speed: 8 to 12 mm / sec In the moving quenching method of moving and quenching a component to be heated by induction hardening, a general moving speed is 8 to 12 mm / sec.
In the embodiment of the present invention, in consideration of continuity with the quenching step (line formation), the moving speed during tempering is also 8 to 12 m.
m / sec.
【００６４】上記試験片を用いて、引張応力と表面の最
高温度を変化させた場合の矯正率を調査した結果を表１
に示す。ここで、下記表中の引張応力とは、下記（１）
式に基づき、柱状のレールに付与する引張荷重をレール
の断面積で割った値である。Using the above test pieces, the results of investigation of the correction rate when the tensile stress and the maximum surface temperature were changed are shown in Table 1.
Shown in Here, the tensile stress in the following table means the following (1)
Based on the formula, it is a value obtained by dividing the tensile load applied to the columnar rail by the cross-sectional area of the rail.
【００６５】 引張応力（ＭＰａ）＝引張荷重（Ｎ）／断面積（ｍｍ2 ）・・・（１） また、下記表中の変形率とは、下記（２）式のように、
柱状のレールの真直度を測定し、真直度をレールの長さ
で割った値を％で表し、レールを３０本測定して求めた
平均値を変形率（％）とした。Tensile stress (MPa) = tensile load (N) / cross-sectional area (mm 2 ) (1) Further, the deformation rate in the following table is expressed by the following equation (2):
The straightness of the columnar rail was measured, the straightness divided by the length of the rail was expressed as%, and the average value obtained by measuring 30 rails was defined as the deformation rate (%).
【００６６】 [0066]
【００６７】[0067]
【表１】 [Table 1]
【００６８】この表１から分かるように、焼戻し矯正時
の最高温度が３５０℃の場合であって、引張応力が付与
された状態で焼戻し処理が行われれば、実施例NO. １〜
１２のように、高い矯正効果が得られ変形率が低くな
る。As can be seen from Table 1, when the maximum temperature at the time of tempering correction is 350 ° C. and the tempering treatment is performed in a state where a tensile stress is applied, Examples Nos.
As in 12, a high correction effect is obtained and the deformation ratio is reduced.
【００６９】特に、引張応力が３０ＭＰａ以上になると
矯正率が更に低下し０．０５％以下となっている。一
方、焼戻し矯正時の温度が３５０℃の場合でも引張応力
を施さない場合には、実施例NO. ２１のように、矯正効
果がないことが分かる。In particular, when the tensile stress is 30 MPa or more, the correction rate is further reduced to 0.05% or less. On the other hand, even when the tempering correction temperature is 350 ° C., when the tensile stress is not applied, it is understood that there is no correction effect as in Example NO.
【００７０】また、引張応力を４０ＭＰａ負荷した状態
で焼戻し且つ矯正時の最高温度が２００〜５００℃に設
定した場合には、実施例NO. １３〜２０に示されるよう
に、高い矯正効果が得られ、特に２５０℃以上になると
矯正率が更に高くなり、変形率は０．０５％以下となる
ことが分かる。When the maximum temperature during tempering and straightening was set to 200 to 500 ° C. with a tensile stress of 40 MPa applied, a high straightening effect was obtained as shown in Examples 13 to 20. It can be seen that the correction rate is further increased when the temperature exceeds 250 ° C., and the deformation rate becomes 0.05% or less.
【００７１】一方、焼戻し矯正時の最高温度が２００℃
未満の場合には、実施例NO. ２２、２３に示すように、
良好な矯正効果が得られず、また、焼戻し矯正時の最高
温度が５００℃を越える場合には、実施例NO. ２４に示
すように、高強度鋼として必要な硬さが得られなくな
る。On the other hand, the maximum temperature during tempering correction is 200 ° C.
If less than, as shown in Example Nos. 22 and 23,
If a good straightening effect cannot be obtained and the maximum temperature during tempering correction exceeds 500 ° C., as shown in Example No. 24, the required hardness as a high-strength steel cannot be obtained.
【００７２】ここで、リニアガイド用レールやボールね
じのねじ軸のような転動部材ではＨＲＣ５８（Ｈｖ：６
５８）以上が必要である。また、本発明の基づく矯正方
法は、捧状や柱状部材を精密に仕上げる部品に関して、
加工コストが高い、硬化熱処理後の旋削や研削加工を大
幅に省力化できるものであるが、この仕上加工コスト
は、変形率ではなく、部品そのものの曲がり量つまり、
真直度そのものが大きく影響する。そして、従来、一般
的な直線の研削加工では真直度が３ｍｍを越えると加工
コストが大きくなるため、矯正を繰り返し行なってい
た。Here, in a rolling member such as a linear guide rail or a screw shaft of a ball screw, HRC58 (Hv: 6) is used.
58) The above is necessary. In addition, the correction method based on the present invention relates to a part for precisely finishing a certificate or a columnar member.
Although the processing cost is high, turning and grinding after hardening heat treatment can be largely labor-saving, but this finishing processing cost is not the deformation rate, but the amount of bending of the part itself, that is,
Straightness itself has a significant effect. In the conventional straight grinding process, if the straightness exceeds 3 mm, the machining cost increases, and thus the straightening is repeatedly performed.
【００７３】従って、例えば、上記リニアガイドのレー
ルの一例を挙げると、これらの部品の長さが３０００ｍ
ｍ程度であれば、変形率が０．１％以下であれば、矯正
効果が高いと評価し、更に長尺部材が長くなった場合を
考慮すると変形率が０．０５％以下になることを望まし
いと考えられる。Accordingly, for example, if one example of the rail of the linear guide is given, the length of these parts is 3000 m.
If it is about m, if the deformation rate is 0.1% or less, it is evaluated that the correction effect is high. Further, considering that the long member becomes longer, the deformation rate becomes 0.05% or less. Deemed desirable.
【００７４】そして、上記試験条件で、矯正焼戻し処理
時の最高到達温度を３５０℃に設定して、引張応力と変
形率との関係について調査したところ、図４に示すよう
な結果を得た。なお、上記表１中のNO. １〜１２，２１
に基づくものである。Under the above test conditions, the maximum temperature during the straightening and tempering treatment was set to 350 ° C., and the relationship between the tensile stress and the deformation rate was investigated. The results shown in FIG. 4 were obtained. It should be noted that, in Table 1 above, NO.
It is based on.
【００７５】この図４から分かるように、従来のよう
に、引張荷重がゼロの場合は矯正効果がほとんど見られ
ないが、若干引張応力を加えると急激に変形率が小さく
なることが分かる。As can be seen from FIG. 4, unlike the related art, when the tensile load is zero, the correction effect is hardly observed, but it is understood that the deformation rate sharply decreases when a slight tensile stress is applied.
【００７６】また、３０ＭＰａ以上の引張応力で引張力
０の従来の場合に比べて変形率が０．０５％以下にな
る。従って、引張応力は、３０ＭＰａ以上がより好まし
い。また、４０ＭＰａを越えると矯正効果がほぼ飽和す
るので、好ましくは４０ＭＰａ以下とするのがよい事が
分かる。荷重は低く設定できれば、その方が望ましいか
らである。Further, the deformation rate becomes 0.05% or less as compared with the conventional case where the tensile force is 0 at the tensile stress of 30 MPa or more. Therefore, the tensile stress is more preferably 30 MPa or more. Further, when the pressure exceeds 40 MPa, the correction effect is almost saturated, and it is understood that the pressure is preferably set to 40 MPa or less. If the load can be set low, it is more desirable.
【００７７】また、矯正する試験片の断面積にもよるが
必要以上に引張荷重を上げると、設備の規模やコストの
問題があり、また試験片そのものが塑性変形して、延び
てしまう場合がある。従って引張応力の上限は試験片が
大きく延ばされたりされない範囲内とする。具体的に
は、常温において鋼の弾性限界（kg／mm2 ）が表面硬さ
Ｈｖ値の１／６となること、及び実際の矯正が２５０〜
５００℃の高温で行われるため、弾性限界が低下するこ
とを考慮し、kgf ／mm2 単位で常温での表面硬さ（Ｈ
ｖ）の約１０分の１が上限となる。If the tensile load is increased more than necessary, depending on the cross-sectional area of the test piece to be corrected, there is a problem of the scale and cost of the equipment, and the test piece itself may be plastically deformed and extended. is there. Therefore, the upper limit of the tensile stress is set within a range where the test piece is not greatly extended. Specifically, at room temperature, the elastic limit (kg / mm 2 ) of the steel is 1/6 of the surface hardness Hv value, and the actual correction is 250 to
To be done at a high temperature of 500 ° C., taking into account that the elastic limit decreases, surface hardness at room temperature in kgf / mm 2 units (H
About 1/10 of v) is the upper limit.
【００７８】従って、単位ＭＰａでは、試験片の表面硬
さ（Ｈｖ）と同じ程度の応力（ＭＰａ）となる。即ち、 上限引張応力（ＭＰａ）＝（常温、焼入れ後の）試験片
の表面硬さ（Ｈｖ） とするのが望ましい。Therefore, in the unit of MPa, the stress (MPa) is about the same as the surface hardness (Hv) of the test piece. That is, it is preferable that the upper limit tensile stress (MPa) = the surface hardness (Hv) of the test piece (after normal temperature and quenching).
【００７９】また、本発明に基づく上記矯正方法を採用
すると、従来の独立した変形橋正工程を省略されて、生
産性が上がり、連続処理も可能になる。このために、上
記実施例では焼戻し工程で変形矯正を同時に行なうが、
焼戻し工程は通常の熱風加熱方式でも原理上は可能であ
る。しかしながら、生産性や連続性を考慮して短時間で
焼戻し処理が可能であり、引張応力下で部分的な矯正が
可能な高周波誘導加熱による焼戻しがより好ましいと考
えられる。Further, when the above-mentioned straightening method according to the present invention is adopted, the conventional independent deformed bridge straightening step is omitted, productivity is increased, and continuous processing is possible. For this reason, in the above embodiment, deformation correction is performed simultaneously in the tempering process,
The tempering process can be performed in principle by a normal hot air heating method. However, tempering can be performed in a short time in consideration of productivity and continuity, and tempering by high-frequency induction heating that can partially correct under tensile stress is considered to be more preferable.
【００８０】次に、上記第１の実施の形態で説明した構
成と同様な装置を使用した、第２実施例の長尺部材の変
形矯正試験及びその結果について説明する。ここで、試
験条件は次の通りである。Next, a description will be given of a test for correcting deformation of a long member in the second embodiment using a device similar to the structure described in the first embodiment, and the result thereof. Here, the test conditions are as follows.
【００８１】 ・試験片形状 ：リニアガイド用のレール部材であっ
て、断面積約３６０ｍｍ2 、長さ３０００ｍｍの柱状部
材 ・矯正焼戻し条件（高周波焼戻し、コイル移動式） 周波数：１０ｋＨｚ コイル通過速度： ８ 〜１２ｍｍ／ｓｅｃ 表面最高温度：３５０℃ 上記試験片を用いて、引張応力を変化させた場合の矯正
率を調査した結果を表２に示す。Test specimen shape: rail member for a linear guide, a columnar member having a cross-sectional area of about 360 mm 2 and a length of 3000 mm ・ Correct tempering conditions (high frequency tempering, coil moving type) Frequency: 10 kHz Coil passing speed: 8 １２12 mm / sec Maximum surface temperature: 350 ° C. Table 2 shows the results of investigating the correction rate when the tensile stress was changed using the above test piece.
【００８２】また、各試験片の鋼種や前処理である硬化
熱処理の方式については、下記表２中に記載した通りで
ある。The steel type of each test piece and the method of hardening heat treatment as a pretreatment are as described in Table 2 below.
【００８３】[0083]
【表２】 [Table 2]
【００８４】この表２から分かるように、引張応力が適
量である３０ＭＰａ以上施した場合には、実施例NO. ２
５〜４５に示すように、いずれの鋼種であっても、ま
た、どの硬化熱処理であっても高い矯正効果が得られ変
形率が低くなっている。As can be seen from Table 2, when a tensile stress of 30 MPa or more, which is an appropriate amount, was applied, Example No. 2 was obtained.
As shown in Nos. 5 to 45, a high straightening effect was obtained and the deformation ratio was low regardless of the type of steel or any hardening heat treatment.
【００８５】一方、引張応力を施さない場合は、実施例
NO. ４６〜５１に示すように、どの鋼種も、また、どの
硬化熱処理であっても矯正効果がないことが分かる。次
に、本発明の変形矯正効果は、焼戻しの最高到達温度に
大きく影響する。つまり、表面の最高到達温度は高周波
の周波数や高周波の電圧、電流、高周波コイルと部品と
の距離及び高周波コイルの移動速度によって決まってく
る。On the other hand, when no tensile stress is applied,
As shown in Nos. 46 to 51, it can be seen that no steel type or any hardening heat treatment has a straightening effect. Next, the deformation correction effect of the present invention greatly affects the maximum temperature of tempering. That is, the maximum temperature reached on the surface is determined by the high frequency, the high frequency voltage and current, the distance between the high frequency coil and the component, and the moving speed of the high frequency coil.
【００８６】これについて、上記試験条件で部材表面の
最高温度と変形率との関係を調査したところ、図５に示
すような結果が得られた。ここで、最高到達温度は、部
品の表面を放射温度計で測定した値とする。また、部材
に負荷する引張応力は４０ＭＰａで、部材の材質はＳ５
８Ｃである。なお、この調査は、上記表１でのNO. １３
〜２０，２２〜２４に基づく。The relationship between the maximum temperature of the member surface and the deformation rate was examined under the above test conditions, and the results shown in FIG. 5 were obtained. Here, the maximum attained temperature is a value obtained by measuring the surface of the component with a radiation thermometer. The tensile stress applied to the member is 40 MPa, and the material of the member is S5
8C. Note that this survey was conducted in the case of NO.
-20, 22-24.
【００８７】この図５から分かるように、表面最高温度
が２００℃未満の場合は焼戻しによる塑性が不足し矯正
効果が低下している。従って、表面最高温度は２００℃
以上が必要であるが、２５０℃以上で変形率が０．０５
％以下になり矯正効果が安定して得られるので、２５０
℃以上が望ましい。また、５００℃を越えても変形率は
良好であるが、高強度な部品として必要な表面硬さが不
足する場合がでてくる。したがって、表面最高温度は５
００℃以下とするのが望ましい。ここで、上記高強度な
部品として必要な表面硬さとは、リニアガイド用のレー
ル、ボールねじのねじ軸のような転動部品では、ＨＲＣ
５８以上が必要である。As can be seen from FIG. 5, when the maximum surface temperature is less than 200 ° C., the plasticity due to tempering is insufficient and the correction effect is reduced. Therefore, the maximum surface temperature is 200 ° C
The above is necessary, but the deformation rate is 0.05
% Or less and the correction effect can be stably obtained.
C or higher is desirable. Further, even if the temperature exceeds 500 ° C., the deformation rate is good, but the surface hardness required for a high-strength part may be insufficient. Therefore, the maximum surface temperature is 5
It is desirable that the temperature is not higher than 00 ° C. Here, the surface hardness required as a high-strength part is HRC for rolling parts such as a linear guide rail and a screw shaft of a ball screw.
58 or more is required.
【００８８】なお、上述のように加熱手段として例えば
熱風加熱方式としてもよいが、この場合、例えば、９０
〜１２０分の長時間の同一温度で焼戻しを行う。従っ
て、硬さ低下防止を考慮すると高周波加熱方式に比べ表
面最高温度を低く設定する。具体的には、矯正効果との
兼ね合いを考え１４０〜３５０℃とする。As described above, the heating means may be, for example, a hot air heating method.
Tempering at the same temperature for a long time of 120 minutes. Therefore, the surface maximum temperature is set lower than that of the high-frequency heating method in consideration of prevention of a decrease in hardness. Specifically, the temperature is set to 140 to 350 ° C. in consideration of the balance with the correction effect.
【００８９】以上の試験結果から分かるように、適当な
引張応力を負荷した状態で所定以上の温度で焼戻しを行
うと、真直度が著しく向上すると同時に焼戻し処理が行
われて長尺部材として要求される所望の硬度を得ること
ができる。As can be seen from the above test results, when tempering is performed at a temperature higher than a predetermined value while applying an appropriate tensile stress, the straightness is remarkably improved, and at the same time, the tempering treatment is performed, and the long members are required. A desired hardness can be obtained.
【００９０】しかも、本装置では、矯正する曲がり変形
の程度にさほど関係なく、同一時間の処理及び一回の処
理で矯正できるために前工程の硬化熱処理及び後工程の
仕上加工とを連続した工程とすることができる。Further, in the present apparatus, since the correction can be performed by the same time processing and one processing regardless of the degree of the bending deformation to be corrected, the hardening heat treatment in the preceding step and the finishing processing in the subsequent step are performed in a continuous process. It can be.
【００９１】つまり、リニアガイドレールの製造工程に
おいては、下記手順でライン化して適用することができ
るようになる。次に、リニアガイド用レールの製造工程
に適用した例を示す。That is, in the manufacturing process of the linear guide rail, it is possible to apply the line by the following procedure. Next, an example in which the present invention is applied to a manufacturing process of a linear guide rail will be described.
【００９２】荒成形（冷間引抜きや切削等）→硬化熱処
理（高周波焼入れ等）→本発明に基づく変形矯正焼戻し
→仕上加工（基準面、及び転動溝研削） また、ボールねじのねじ軸の製造工程に適用した例を示
す。Rough forming (cold drawing, cutting, etc.) → hardening heat treatment (induction hardening, etc.) → deformation correction tempering based on the present invention → finish processing (grinding of reference surface and rolling groove) An example applied to a manufacturing process will be described.
【００９３】荒成形（外径，ねじ溝の切削や転造）→硬
化熱処理（浸炭焼入れ等）→本発明に基づく変形矯正焼
戻し →仕上加工（端部追加工，及び外周面や転動溝の
研削）Rough forming (cutting and rolling of outer diameter and thread groove) → Hardening heat treatment (carburizing and quenching) → Deformation correction and tempering based on the present invention → Finishing (additional processing of the end and the outer peripheral surface and rolling grooves) grinding)
【００９４】[0094]
【発明の効果】以上説明してきたように、この発明は、
硬化熱処理時に変形した棒状や柱状の長尺部材を引張応
力を与えた状態で焼戻し処理を行うことで、曲がりや捩
じれの変形矯正効果及び焼戻し処理の効果が同時に得る
ことができるという効果がある。As described above, the present invention provides:
By performing the tempering process in a state where a tensile stress is applied to the rod-shaped or column-shaped elongated member deformed during the hardening heat treatment, there is an effect that the effect of correcting the deformation of bending and twisting and the effect of the tempering process can be simultaneously obtained.
【００９５】本発明では従来不安定であった棒状や柱状
の長尺部材の変形矯正が、焼戻し処理時に安定した矯正
効果が得られ、独立した変形矯正処理が不要となるの
で、短時間に処理され、連続処理が可能で生産性を向上
させることができるという効果がある。In the present invention, the deformation correction of a long rod-shaped or column-shaped long member, which has been unstable in the past, can be performed in a short time because a stable correction effect can be obtained at the time of tempering processing and independent deformation correction processing becomes unnecessary. Thus, there is an effect that continuous processing is possible and productivity can be improved.
【００９６】さらに、硬化熱処理工程とのライン化が可
能であり、ライン化した場合には、寸法精度が良好な熱
処理を完了した棒状や柱状の長尺部材を次工程である旋
削又は研削工程等の仕上加工工程に供給することで次工
程の効率が大幅に向上する効果がある。Further, it is possible to make a line with the hardening heat treatment step, and in the case where the line is made, a rod-like or column-like long member that has been subjected to heat treatment with good dimensional accuracy is subjected to the next step such as a turning or grinding step. In this case, there is an effect that the efficiency of the next process is greatly improved by supplying the material to the finishing process.
【図１】本発明の第１の実施の形態に係る変形矯正装
置、及び処理手順を示す図であり、（ａ）は長尺部材の
取付け時を、（ｂ）は長尺部材を取付けて引張力を負荷
した状態を、（ｃ）は加熱処理をした状態を、（ｄ）は
後処理及び前処理を示す図である。FIGS. 1A and 1B are views showing a deformation correcting apparatus and a processing procedure according to a first embodiment of the present invention, wherein FIG. 1A shows a state in which a long member is attached, and FIG. It is a figure which shows the state which applied the tensile force, (c) shows the state which performed the heat processing, and (d) shows the post-processing and the pre-processing.
【図２】本発明の第１の実施の形態に係る変形矯正装置
を示す概略平面図である。FIG. 2 is a schematic plan view showing the deformation correcting device according to the first embodiment of the present invention.
【図３】本発明の第２の実施の形態に係る変形矯正装置
を示す概略構成図である。FIG. 3 is a schematic configuration diagram showing a deformation correcting device according to a second embodiment of the present invention.
【図４】引張応力と変形率との関係を示す図である。FIG. 4 is a diagram showing the relationship between tensile stress and deformation rate.
【図５】焼戻し時の最高温度と変形率との関係を示す図
である。FIG. 5 is a diagram showing the relationship between the maximum temperature during tempering and the deformation ratio.
１ 高周波誘導加熱コイル装置 １ａ コイル部 ２ 長尺部材 ２ａ 先端部 ２ｂ 後端部 ３，４ クランプ装置 ３ａ，４ａ チャック ５ 負荷手段 １０ 設置台 １１ 矯正ロール DESCRIPTION OF SYMBOLS 1 High frequency induction heating coil device 1a Coil part 2 Long member 2a Front end 2b Rear end 3,4 Clamping device 3a, 4a Chuck 5 Loading means 10 Installation table 11 Straightening roll
───────────────────────────────────────────────────── フロントページの続き (72)発明者 前田 明年 神奈川県藤沢市鵠沼神明一丁目５番50号 日本精工株式会社内 (72)発明者 川▲さき▼ 友義 埼玉県羽生市大沼１−１ 日本精工株式会 社内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akinori Maeda 5-5-150 Kugenuma Shinmei, Fujisawa-shi, Kanagawa Nippon Seiko Co., Ltd. (72) Inventor Kawa ▲ Saki ▼ Tomoyoshi 1-1 Onuma, Hanyu-shi, Saitama Japan Seiko Stock Company In-house
Claims (1)
ている変形を矯正する方法であって、 上記長尺部材を、長手方向に引張応力を加えた状態で焼
戻し処理を行うことにより矯正することを特徴とする長
尺部材の変形矯正方法。1. A method for correcting deformation of a steel long member which has been subjected to hardening heat treatment, wherein the long member is subjected to a tempering treatment in a state where a tensile stress is applied in a longitudinal direction. A method for correcting deformation of a long member, comprising correcting the deformation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31072296A JP4013269B2 (en) | 1996-11-21 | 1996-11-21 | Deformation correction method for long members |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31072296A JP4013269B2 (en) | 1996-11-21 | 1996-11-21 | Deformation correction method for long members |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10156436A true JPH10156436A (en) | 1998-06-16 |
| JP4013269B2 JP4013269B2 (en) | 2007-11-28 |
Family
ID=18008698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31072296A Expired - Fee Related JP4013269B2 (en) | 1996-11-21 | 1996-11-21 | Deformation correction method for long members |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4013269B2 (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0967027A2 (en) * | 1998-06-27 | 1999-12-29 | Sms Schloemann-Siemag Aktiengesellschaft | Method for straightening steel sections while at the same time minimising the internal stress |
| US7147731B2 (en) | 2001-03-28 | 2006-12-12 | Neturen Co., Ltd. | Flanged parts producing method, and heat-treating device and heat treating method therefor |
| CN100453195C (en) * | 2006-12-20 | 2009-01-21 | 重庆镁业科技股份有限公司 | Magnesium alloy extrusion product straightening method and tension straightening machine used therefor |
| CN103521559A (en) * | 2013-10-29 | 2014-01-22 | 广州珠江钢琴集团股份有限公司 | Correcting device and method for hands of piano players |
| JP2014140880A (en) * | 2013-01-25 | 2014-08-07 | Toho Titanium Co Ltd | Reaction vessel correction device and reaction vessel correction method using the same |
| JP2014188572A (en) * | 2013-03-28 | 2014-10-06 | Jfe Steel Corp | Method of manufacturing rail |
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| AT518414B1 (en) * | 2016-04-13 | 2017-10-15 | Friedrich Moser | Method for straightening a workpiece |
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| JP2018130731A (en) * | 2017-02-14 | 2018-08-23 | エステック株式会社 | Correction method of linear workpiece and its device |
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| CN113828657A (en) * | 2021-09-28 | 2021-12-24 | 重庆长征重工有限责任公司 | Deformed workpiece hot-pressing correction method |
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| CN107532697B (en) | 2015-04-02 | 2020-02-21 | 日本精工株式会社 | Screw shaft, method for manufacturing same, and ball screw device |
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1996
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0967027A2 (en) * | 1998-06-27 | 1999-12-29 | Sms Schloemann-Siemag Aktiengesellschaft | Method for straightening steel sections while at the same time minimising the internal stress |
| EP0967027A3 (en) * | 1998-06-27 | 2000-07-05 | SMS Demag AG | Method for straightening steel sections while at the same time minimising the internal stress |
| US7147731B2 (en) | 2001-03-28 | 2006-12-12 | Neturen Co., Ltd. | Flanged parts producing method, and heat-treating device and heat treating method therefor |
| CN100453195C (en) * | 2006-12-20 | 2009-01-21 | 重庆镁业科技股份有限公司 | Magnesium alloy extrusion product straightening method and tension straightening machine used therefor |
| JP2014140880A (en) * | 2013-01-25 | 2014-08-07 | Toho Titanium Co Ltd | Reaction vessel correction device and reaction vessel correction method using the same |
| JP2014188572A (en) * | 2013-03-28 | 2014-10-06 | Jfe Steel Corp | Method of manufacturing rail |
| CN103521559A (en) * | 2013-10-29 | 2014-01-22 | 广州珠江钢琴集团股份有限公司 | Correcting device and method for hands of piano players |
| AT518414B1 (en) * | 2016-04-13 | 2017-10-15 | Friedrich Moser | Method for straightening a workpiece |
| AT518414A4 (en) * | 2016-04-13 | 2017-10-15 | Friedrich Moser | Method for straightening a workpiece |
| US11072010B2 (en) | 2016-04-13 | 2021-07-27 | Most Technik Gmbh | Method and device for straightening a workpiece |
| CN105750366A (en) * | 2016-04-22 | 2016-07-13 | 中建三局集团有限公司 | Metal flexible adapter straightener and making method thereof |
| JP2018130731A (en) * | 2017-02-14 | 2018-08-23 | エステック株式会社 | Correction method of linear workpiece and its device |
| CN107900140A (en) * | 2017-11-07 | 2018-04-13 | 中国二冶集团有限公司 | The construction method of correction steel bridge beam and face buckling deformation is completed using gantry cutting machine |
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| CN114178353A (en) * | 2021-12-15 | 2022-03-15 | 中国航发动力股份有限公司 | Deformation correction method for welding position of nozzle type casting |
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