JPH0683877B2 - Method and apparatus for detecting abnormal position of front dead center of header - Google Patents
Method and apparatus for detecting abnormal position of front dead center of headerInfo
- Publication number
- JPH0683877B2 JPH0683877B2 JP15346885A JP15346885A JPH0683877B2 JP H0683877 B2 JPH0683877 B2 JP H0683877B2 JP 15346885 A JP15346885 A JP 15346885A JP 15346885 A JP15346885 A JP 15346885A JP H0683877 B2 JPH0683877 B2 JP H0683877B2
- Authority
- JP
- Japan
- Prior art keywords
- dead center
- ram
- header
- allowable range
- value
- 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.)
- Expired - Lifetime
Links
Landscapes
- Punching Or Piercing (AREA)
- Forging (AREA)
- Control Of Presses (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、クランク軸等の駆動によりフレームに沿つて
略水平方向に往復運動するラムの先端に装着したパンチ
とその前方においてフレームに装着したダイスの間でワ
ークを打圧して圧造成形を施すヘツダーにおいて、ラム
の前死点位置の異常を検知する方法及びその実施に使用
する装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch attached to the tip of a ram that reciprocates in a substantially horizontal direction along a frame by driving a crankshaft and the like, and a die attached to the frame in front of the punch. TECHNICAL FIELD The present invention relates to a method for detecting an abnormality in the position of the front dead center of a ram in a header that presses a work in between to perform forging, and an apparatus used for the method.
従来の技術 ヘツダーにおいては、ワークの寸法または供給姿勢の異
常、ワークが供給されないことによる空打ち、製品の突
き出し不能による二重打ち、または、パンチの欠損等の
異常が生じた場合に、これらを速やかに検知して運転を
停止し、不良品の継続発生や機械工具の損傷等を未然に
防止する対策を講じる必要がある。ところで、上記のよ
うなヘツダーの異常のうち、例えば、空打ちやパンチの
欠損があつた場合には、ラムに作用する負荷が減少して
ラムの前死点位置がダイスブロツク側に近づき、二重打
ちがあつた場合には、逆に負荷が増大して前死点位置が
ダイスブロツクから離間するのであつて、このため従
来、上記のようにヘツダーに異常が生じた場合にラムの
前死点位置が変動することを利用し、ラムの１往復運動
毎にその前死点位置を正確に検出して、その検出値が予
め定められた許容範囲の最大値と最小値を超えた場合
に、異常信号を出力してランプやブザー等の警報装置を
作動させたり、自動的に運転を停止させるようにした前
死点位置異常検知方法が採用されていた。In the conventional technology, when the size of the work or the supply posture is abnormal, the blank work due to the non-supply of the work, the double hitting due to the inability to eject the product, or the defect of the punch occurs It is necessary to promptly detect and stop the operation, and take measures to prevent the continued occurrence of defective products and damage to machine tools. By the way, of the above-mentioned abnormalities of the header, for example, when there is a blank hit or a punch defect, the load acting on the ram decreases and the ram front dead center position approaches the die block side. If there is a heavy hit, on the contrary, the load will increase and the position of the front dead center will be separated from the die block.For this reason, in the past, when the abnormality in the header occurred as described above, the front death of the ram occurred. By utilizing the fact that the position of the point fluctuates, the position of the front dead center is accurately detected for each reciprocating motion of the ram, and when the detected value exceeds the maximum and minimum values of the predetermined allowable range. , A method of detecting an abnormality in the position of the pre-dead center, which outputs an abnormal signal to activate an alarm device such as a lamp or a buzzer, or automatically stops the operation.
しかるに、ヘツダーにおけるラムの前死点位置は、第２
図のグラフの曲線Ａに示すように、運転開始時からしば
らくの間は、パンチがワークを打圧することにより次第
に温度が上昇して熱膨張を生じ、その長さが少しずつ増
大するため、正しい寸法のワークが供給されて何ら異常
なく圧造が行なわれていても、ラムに作用する負荷が徐
々に増大して後退し、一定時間経過してパンチの温度上
昇が止まると略一定位置を推持し、長時間運転が継続さ
れてパンチ及びダイスの摩耗が生じはじめると、少しず
つ負荷が減少してダイスブロツクに近づき、経時的に緩
やかに変化するのが通常であつて、このよう経時的な緩
やかな変化は、その変化がある程度大きくても正常な運
転が継続されるの対し、パンチの欠損等の突発的な異常
によるラムの前死点位置の急激な変化は、その変化が比
較的小さくても不良発生の兆候であり、したがつて、こ
のような突発的な異常を的確に検知するために、ラムの
前死点位置の変化の許容範囲を狭く設定すると、正常な
運転が継続されているにもかかわらず、経時的な変化に
より許容範囲を超えて異常信号が発せられることがあ
り、逆に、経時的な変化により異常信号が発せられない
ように、許容範囲を広く設定すると、不良品発生の原因
となる突発的な異常を検知することができない欠点があ
つた。However, the ram's pre-dead-center position in Hetzder is
As shown by the curve A in the graph of the figure, for a while from the start of operation, the temperature of the punch gradually rises due to the pressing of the work to cause thermal expansion, and the length gradually increases. Even if the workpiece of the specified size is supplied and the forging is performed without any abnormalities, the load acting on the ram gradually increases and retracts, and when the temperature rise of the punch stops for a certain period of time, the punch keeps a substantially constant position. However, when the punches and dies start to wear due to continuous operation for a long time, the load gradually decreases to approach the die block, and it is normal that the load gradually changes. A gradual change means that normal operation will continue even if the change is large to some extent, whereas a sudden change in the ram's front dead center position due to a sudden abnormality such as a punch defect is relatively small. But not This is a symptom of the occurrence, and therefore, in order to accurately detect such a sudden abnormality, if the allowable range of the change in the ram's pre-dead center position is set narrow, normal operation will continue. Despite this, abnormal signals may be emitted beyond the allowable range due to changes over time, and conversely, if the allowable range is set wide so that abnormal signals do not occur due to changes over time, defective products will occur. However, there is a drawback that it is not possible to detect a sudden abnormality that causes
発明が解決しようとする問題点 そこで本願出願人は、特開昭60−69295号において、ラ
ムの前死点位置の緩やかな変化については、比較的大き
な絶対的許容範囲を定めてこれを検知するようにし、こ
れとは別に、前死点位置の検出値の経時的変動から前記
の特性曲線Ａに倣つた予想値を演算する手段を設けて、
この予想値と実際の検出値との差が予め定められた相対
的許容範囲内にあるか否かを判別するようにし、この相
対的許容範囲を小さな幅に設定することによつて、パン
チの欠損等の突発的な異常を的確に検知するようにした
検知方法を提案したが、実際の検出値は、運転開始後し
ばらくの間については、前記の特性曲線Ａに対してばら
つきの程度が大きく、一定時間経過して安定期に入ると
ばらつきの程度が小さくなるのであり、しかるに、先に
提案した方法にあつては、相対的許容範囲が一定の幅に
設定されるようになつていたため、設定の幅が狭過ぎる
と、運転の立ち上がりのばらつきの程度の大きい部分に
おいて正常であるにもかかわらず異常の判別がなされ、
この部分に合わせて幅を拡げると、ばらつきの程度の小
さい安定期における異常の検知がラフになり、突発的な
異常を検知する上で今一つ信頼性に乏しく、より的確に
検知し得る方法及びその実施に使用する装置が要求され
ていた。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention Therefore, the applicant of the present application, in Japanese Patent Laid-Open No. 60-69295, detects a relatively large absolute allowable range for a gradual change in the front dead center position of a ram. In addition to this, a means for calculating an expected value that follows the characteristic curve A from the temporal change in the detected value of the front dead center position is provided separately,
By determining whether or not the difference between the predicted value and the actual detected value is within a predetermined relative allowable range, and setting the relative allowable range to a small width, the punch Although a detection method was proposed in which a sudden abnormality such as a defect is accurately detected, the actual detected value has a large degree of variation with respect to the characteristic curve A for a while after the start of operation. However, the degree of variability decreases when a certain period of time elapses before entering the stable period.However, in the previously proposed method, the relative permissible range was set to a certain range. If the setting range is too narrow, it will be judged as abnormal even though it is normal in the part where there is a large degree of variation in the start-up of operation.
If the width is expanded according to this part, detection of anomalies in the stable period with a small degree of variation becomes rough, and there is still less reliability in detecting sudden anomalies, and a method that can be more accurately detected. The equipment used for implementation was required.
本発明は、上記した事情を背景として完成されたもので
ある。The present invention has been completed in view of the above circumstances.
実施例 以下、本発明装置の一実施例を添付図面に基づいて説明
し、その作用の説明によつて本発明方法の一実施例を明
らかにする。Embodiment Hereinafter, one embodiment of the device of the present invention will be described with reference to the accompanying drawings, and one embodiment of the method of the present invention will be clarified by the explanation of its operation.
図示しないクランク軸の駆動によりフレームａ沿つて略
水平に往復運動するラムｄの先端に装着されたパンチホ
ルダｅにパンチｆが固着され、その前方においてフレー
ムａに固着されたダイスブロツクｂにパンチｆと対向す
るダイスｃが嵌着されており、第１図に鎖線で示すよう
に、ラムｄとともにパンチｆが前死点位置に前進してダ
イスｃとの間でワークｗを打圧して圧造成形を施すよう
になつており、フレームａのラムｄと対向する面には、
ラムｄの前死点位置におけるラムｄの先端面との距離Ｘ
を検出する検出手段である磁気センサ１が取り付けられ
ており、この磁気センサ１の検出値は、第１の演算回路
２、第２の演算回路３及び第１の判別回路６に入力され
るようになつている。A punch f is fixed to a punch holder e attached to the tip of a ram d that reciprocates substantially horizontally along a frame a by driving a crank shaft (not shown), and a punch f is attached to a die block b fixed to the frame a in front of the punch f. The die c opposed to the die is fitted, and as shown by the chain line in FIG. 1, the punch f is advanced to the position of the front dead center together with the ram d, and the work w is pressed against the die c to forge forming. Is applied to the surface of the frame a facing the ram d,
Distance X from the front end surface of the ram d at the position of the dead center of the ram d
A magnetic sensor 1 which is a detection means for detecting is detected, and the detection value of the magnetic sensor 1 is input to the first arithmetic circuit 2, the second arithmetic circuit 3, and the first discriminating circuit 6. It has become.
第１の演算回路２は、ラムｄの最近の一定回数の前死点
位置の検出値Ｘの平均値を順次に演算するものであつ
て、ラムｄのｎ回目のストロークの前死点位置の検出値
をXnとした場合に、その前のｍ回分の検出値のＸの平均
値μを、 として演算し、その演算結果を第２の演算回路３と第３
の演算回路４に入力するようになつている。The first arithmetic circuit 2 sequentially calculates the average value of the detected values X of the ram d at the latest predetermined number of times of the pre-dead center position, and calculates the pre-dead center position of the n-th stroke of the ram d. When the detected value is Xn, the average value μ of the detected values of m times before that is As the second operation circuit 3 and the third operation result
Input to the arithmetic circuit 4.
第２の演算回路３は、上記と同様に、ラムｄの最近のｍ
回の前死点位置の検出値Ｘの標準偏差を順次に演算する
ものであつて、標準偏差σを、 として演算し、その演算結果を第３の演算回路４に入力
するようになつている。The second arithmetic circuit 3 is similar to the above, and the latest m of the ram d is used.
In order to sequentially calculate the standard deviation of the detected value X at the number of times of the dead center, the standard deviation σ is Is calculated and the calculation result is input to the third calculation circuit 4.
第３の演算回路４は、上記の平均値μと標準偏差σに基
づき、平均値μを中心として、標準偏差σに定数入力装
置５により予め入力された定数ｋを乗じた±ｋσの幅を
持たせた相対的許容範囲ｈを演算し、その演算結果を第
１の判別回路６に入力するようになつている。Based on the average value μ and the standard deviation σ, the third arithmetic circuit 4 sets a range of ± kσ obtained by multiplying the standard deviation σ by the constant k previously input by the constant input device 5 based on the average value μ. The relative allowable range h that is provided is calculated, and the calculation result is input to the first discriminating circuit 6.
第１の判別回路６は、磁気センサ１から入力されるｎ回
目のストロークの前死点位置の実際の検出値Xnが、上記
の相対的許容範囲ｈ内であるか否かを判別し、その判別
信号を異常信号発信装置７に入力するものであり、この
異常信号発信装置７は、第１の判別回路６から相対的許
容範囲ｈを超えたという判別信号が入力されたとき、ラ
ンプ、ブザー等の警報器を駆動し、または、ヘツダーの
運転を停止させる異常信号を発信するようになつてい
る。The first determination circuit 6 determines whether or not the actual detection value Xn of the front dead center position of the nth stroke input from the magnetic sensor 1 is within the relative allowable range h, and The discrimination signal is input to the abnormal signal transmission device 7, and when the discrimination signal that the relative allowable range h is exceeded is input from the first discrimination circuit 6, the abnormal signal transmission device 7 outputs a lamp and a buzzer. An alarm signal such as driving an alarm device or stopping the operation of the header is transmitted.
また、磁気センサ１の検出値はさらに第２の判別回路８
に入力され、この第２の判別回路８は、検出値Xnが設定
装置９により予め入力された絶対的許容範囲の上限H1と
下限値H2の中に収まつているか否かを判別し、その判別
信号を前記した異常信号発信装置７に入力するものであ
つて、前記と同様に異常信号発信装置７が許容範囲を超
えたという判別信号を受けると、異常信号を発信するよ
うになつている。Further, the detection value of the magnetic sensor 1 is further determined by the second determination circuit 8
The second discriminating circuit 8 discriminates whether or not the detected value Xn falls within the upper limit H 1 and the lower limit H 2 of the absolute permissible range inputted in advance by the setting device 9. The discrimination signal is inputted to the above-mentioned abnormality signal transmitting device 7, and when the discrimination signal that the abnormality signal transmitting device 7 exceeds the permissible range is received in the same manner as described above, the abnormality signal is transmitted. ing.
次に、本実施例の作用を説明する。Next, the operation of this embodiment will be described.
ラムｄの前死点位置が第２図の曲線Ａで示すように変化
するヘツダーの運転過程において、平均値μは曲線Ａに
略倣つて推移し、その平均値μを中心として設定される
相対的許容範囲ｈは、その値ｈが標準偏差σに基づいて
演算されることから、運転開始後しばらくの間の検出値
Ｘのばらつきの程度の大きい部分では大きな幅ｈを採
り、安定期に入つてばらつきの程度が小さくなると、そ
の幅ｈが小さくなるのであつて、安定期において、パン
チｆの欠損等の突発的な異常が生じ、その欠損量がごく
僅かで前死点位置の変化が微少であつても、相対的許容
範囲ｈの幅が狭いために、これを見逃さずに的確に検知
し、異常信号発信装置７から異常信号が発信されるので
あり、これに対して、運転開始後しばらくの間の正常運
転にもかかわらず検出値Ｘが大きくばらつく領域では、
それが広い幅に設定された相対的許容範囲ｈ内に収めら
れていれば異常信号は発せられない。In the operation process of the header in which the position of the front dead center of the ram d changes as shown by the curve A in FIG. 2, the average value μ changes substantially along the curve A, and the relative value set around the average value μ. The allowable range h is calculated based on the standard deviation σ, and therefore the large range h is adopted in the portion where the degree of variation in the detected value X is large for a while after the start of operation, and the stable period is entered. As the degree of variation becomes smaller, the width h becomes smaller, and during the stable period, a sudden abnormality such as a defect of the punch f occurs, the amount of the defect is very small, and the change in the position of the front dead center is very small. Even so, since the width of the relative permissible range h is narrow, it is accurately detected without missing it, and the abnormal signal is transmitted from the abnormal signal transmitting device 7. Detected despite normal operation for some time In the region where the X greatly varies,
If it is within the relative allowable range h set to a wide width, no abnormal signal is emitted.
また、第２の判別回路８には、絶対的許容範囲が入力さ
れていて、パンチｆやダイスｃの摩耗が一定以上進行
し、磁気センサ１の検出値Ｘが下限値H2を下まわつたと
ころで、同じく異常信号発信装置７から異常信号が発せ
られて不良品の発生が防止され、また、上限値H1につい
ては、例えば、製品の頭部高さに厳しい寸法精度が要求
される場合に、この上限値H1を相対的許容範囲ｈを超え
ない低い値に設定することにより、製品の頭部高さを厳
しくチエツクするのに利用することができる。Further, since the absolute permissible range is input to the second discriminating circuit 8, the wear of the punch f and the die c progresses beyond a certain level, and the detection value X of the magnetic sensor 1 falls below the lower limit value H 2. By the way, similarly, an abnormal signal is emitted from the abnormal signal transmitting device 7 to prevent the generation of defective products, and the upper limit value H 1 is, for example, when the head height of the product requires strict dimensional accuracy. By setting the upper limit value H 1 to a low value that does not exceed the relative allowable range h, it can be used to strictly check the head height of the product.
なお、運転を開始してから一定回数に達するまでの間
は、本発明は適用せず、一回毎の測定値をあらかじめ定
めた絶対値と比較して適否を判別し、または、自動的な
検知は行わず、製品を全数検査する。It should be noted that, from the start of operation until a certain number of times is reached, the present invention is not applied, the measured value for each time is compared with a predetermined absolute value to determine suitability, or automatic. All products are inspected without detection.
発明の構成及び効果 上記実施例によつて具体的に説明したように、本発明の
ヘツダーの前死点位置異常検知方法は、フレームに装着
したダイスと往復運動するラムの先端に装着したパンチ
の間でワークを打圧して圧造成形を施すヘツダーにおい
て、ラムの一往復運動毎にその前死点位置を検出し、そ
の最新の検出値が、ラムの最近の一定回数の前死点位置
の検出値の平均値と標準偏差に基づいて定められた許容
範囲内にあるか否かを判別し、その判別結果が前記許容
範囲外である場合に異常信号を発することを要旨するも
のであつて、パンチの欠損等の突発的な異常による急激
な変化を監視するのに用いる許容範囲の幅が、検出値の
ばらつきの程度に対応して自動的に変えられるから、検
出値の単なるばらつきに基づく誤作動を防止した上で、
ごく小さな異常でもこれを見逃さずに的確に検知し得る
効果を奏する。Structure and Effect of the Invention As specifically described with reference to the above embodiments, the method for detecting the position of the front dead center of the header of the header according to the present invention is not limited to the die mounted on the frame and the punch mounted on the tip of the reciprocating ram. The head dead center position is detected for each reciprocating motion of the ram in the header that presses the work between and press-forms, and the latest detected value is the latest predetermined number of times the front dead center position of the ram is detected. Based on the average value and the standard deviation of the values to determine whether it is within the allowable range determined, if the determination result is outside the allowable range, it is a gist to issue an abnormal signal, The width of the permissible range used to monitor sudden changes due to sudden abnormalities such as punch defects can be automatically changed according to the degree of variation in the detected values, so errors based on simple variations in the detected values After preventing the operation ,
Even a very small abnormality can be detected accurately without missing it.
また、本発明のヘツダーの前死点位置異常検知装置は、
フレームに装着したダイスと往復運動するラムの先端に
装着したパンチの間でワークを打圧して圧造成形を施す
ヘツダーにおいて、ラムの一往復運動毎にその前死点位
置を検出する検出手段と、ラムの最近の一定回数の前死
点位置の検出値の平均値と標準偏差を演算する手段と、
前記平均値と前記標準偏差から許容範囲を演算する手段
と、前記検出手段の最新の検出値が前記許容範囲内であ
るか否かを判別する判別手段と、該判別手段の判別結果
が前記許容範囲外である場合に異常信号を発する異常信
号発信手段とからなることを要旨とするものであつて、
上記発明方法を確実に実施し得る効果を奏する。Further, the head dead center position abnormality detection device of the header of the present invention,
In a header that presses a work between a die attached to a frame and a punch attached to the tip of a reciprocating ram to perform forging, a detecting unit that detects the pre-dead center position of the ram for each reciprocating movement, Means for calculating the average value and standard deviation of the detected values of the ram's recent fixed number of pre-dead-center positions,
A means for calculating an allowable range from the average value and the standard deviation, a judging means for judging whether or not the latest detected value of the detecting means is within the allowable range, and a judgment result of the judging means is the allowable value. The gist of the invention is that it comprises an abnormal signal transmitting means for emitting an abnormal signal when it is out of the range,
There is an effect that the above-mentioned method of the invention can be surely carried out.
第１図は本発明装置の一実施例のブロツク図、第２図は
ラムの前死点位置の変化を示すグラフである。 a:フレーム、c:ダイス、d:ラム、f:パンチ、1:磁気セン
サ、2:第１の演算回路、3:第２の演算回路、4:第３の演
算回路、5:定数入力装置、6:第１の判別回路、7:異常信
号発信装置FIG. 1 is a block diagram of an embodiment of the device of the present invention, and FIG. 2 is a graph showing the change of the front dead center position of the ram. a: frame, c: die, d: ram, f: punch, 1: magnetic sensor, 2: first arithmetic circuit, 3: second arithmetic circuit, 4: third arithmetic circuit, 5: constant input device , 6: First discrimination circuit, 7: Abnormal signal transmitter
Claims (2)
往復運動するラム（ｄ）の先端に装着したパンチ（ｆ）
の間でワーク（ｗ）を打圧して圧造成形を施すヘツダー
において、ラム（ｄ）の一往復運動毎にその前死点位置
を検出し、その最新の検出値が、ラム（ｄ）の最近の一
定回数の前死点位置の検出値の平均値と標準偏差に基づ
いて定められた許容範囲内にあるか否かを判別し、その
判別結果が前記許容範囲外である場合に異常信号を発す
ることを特徴とするヘツダーの前死点位置異常検知方
法。1. A die (c) mounted on a frame (a) and a punch (f) mounted on the tip of a ram (d) which reciprocates.
In the header which presses the work (w) between the head and the head, the front dead center position is detected for each reciprocating motion of the ram (d), and the latest detected value is the latest value of the ram (d). It is determined whether or not it is within an allowable range set based on the average value and standard deviation of the detection values of the front dead center position of a certain number of times, and if the determination result is outside the allowable range, an abnormal signal is generated. A method for detecting an abnormality in the position of the front dead center of the header, which is characterized by being emitted.
往復運動するラム（ｄ）の先端に装着したパンチ（ｆ）
の間でワーク（ｗ）を打圧して圧造成形を施すヘツダー
において、ラム（ｄ）の一往復運動毎にその前死点位置
を検出する検出手段と、ラムの最近の一定回数の前死点
位置の検出値の平均値と標準偏差を演算する手段（２、
３）と、前記平均値と前記標準偏差から許容範囲を演算
する手段（４）と、前記検出手段の最新の検出値が前記
許容範囲内であるか否かを判別する判別手段（６）と、
該判別手段の判別結果が前記許容範囲外である場合に異
常信号を発する異常信号発信手段（７）とからなること
を特徴とするヘツダーの前死点位置異常検知装置。2. A punch (f) mounted on the tip of a ram (d) which reciprocates with a die (c) mounted on the frame (a).
In the header which presses the work (w) between and press-forms, the detecting means for detecting the position of the pre-dead center of the ram (d) every one reciprocating motion, and the pre-dead center of the ram for a certain number of recent times. A means for calculating the average value and standard deviation of the detected values of the position (2,
3), a means (4) for calculating an allowable range from the average value and the standard deviation, and a judging means (6) for judging whether or not the latest detected value of the detecting means is within the allowable range. ,
A front dead center position abnormality detecting device for a header, comprising: an abnormal signal transmitting means (7) for emitting an abnormal signal when the determination result of the determining means is outside the allowable range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15346885A JPH0683877B2 (en) | 1985-07-11 | 1985-07-11 | Method and apparatus for detecting abnormal position of front dead center of header |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15346885A JPH0683877B2 (en) | 1985-07-11 | 1985-07-11 | Method and apparatus for detecting abnormal position of front dead center of header |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6213231A JPS6213231A (en) | 1987-01-22 |
| JPH0683877B2 true JPH0683877B2 (en) | 1994-10-26 |
Family
ID=15563223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15346885A Expired - Lifetime JPH0683877B2 (en) | 1985-07-11 | 1985-07-11 | Method and apparatus for detecting abnormal position of front dead center of header |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0683877B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0710821Y2 (en) * | 1988-02-12 | 1995-03-15 | 株式会社阪村機械製作所 | Anomaly detection device for molding material in forging machine |
| JPH0390241A (en) * | 1989-08-31 | 1991-04-16 | Nitto Seiko Co Ltd | Punch abnormality detecting device of head part forming machine |
| JPH0698436B2 (en) * | 1989-10-24 | 1994-12-07 | 日東精工株式会社 | Punch abnormality detection device for head forming machine |
-
1985
- 1985-07-11 JP JP15346885A patent/JPH0683877B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6213231A (en) | 1987-01-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4412456A (en) | Load sensing probe | |
| JP4860444B2 (en) | Abnormality detection method in cutting | |
| US5560238A (en) | Thread rolling monitor | |
| JP3076548B2 (en) | Tool wear detecting device and method | |
| EP1472466B1 (en) | Wear measurement device | |
| US4615197A (en) | Thread rolling monitoring system | |
| JPH0683877B2 (en) | Method and apparatus for detecting abnormal position of front dead center of header | |
| CN217728743U (en) | Belt feeder inspection robot | |
| JP2003311553A (en) | Press-fitting apparatus | |
| JPS63309340A (en) | Device for detecting abnormality of flat thread rolling machine | |
| JPH0322248B2 (en) | ||
| CN105333844A (en) | Online rapid measurement apparatus and method for detecting rivet point dimension | |
| JPS61229440A (en) | Abnormality detecting equipment for front dead center position of header | |
| US7054789B2 (en) | Abnormality determination and estimation method for product of plastic working, and an abnormality determination and estimation device | |
| JPH0322247B2 (en) | ||
| JPH06114694A (en) | Cutter failure sensing device of machining device | |
| JP2023525684A (en) | Diagnosis of can body manufacturers | |
| JP2022081203A (en) | Forging press and abnormality monitoring method for the same | |
| JP3764434B2 (en) | Forming status monitoring device in forging press | |
| US10821491B2 (en) | Method and device for monitoring the functional state of a shaping tooth arrangement on a forming tool | |
| JP2022152237A (en) | Forging-press machine and abnormality detection method for its workpiece attitude | |
| CN110695134A (en) | Offset load online measuring device and evaluation method for fine blanking progressive die | |
| JP2003220441A (en) | Method for monitoring fastened state and fastening device for using the same | |
| JP2004290994A (en) | Forming of rolling machine having device for detecting defective goods | |
| JPH09327800A (en) | Abnormality detecting device of ram in header |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |