JPH0946980A - Press die apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to process with an accurate working depth by providing a punch and stopper at the same ram and by interlaying an elastic body having a spring constant higher than the work force between a backing and the ram. SOLUTION: A punch 4 is coupled through a coupling bolt 6 in a state where the tip of the punch is projected out from the tip of a stopper 5, a flexible elastic body 9 has a spring constant higher than a work force required for the processing of work piece and is located between the backing of spring plate 8 and ram 10. When a caulking projection is formed with a punch 4 until the stopper 5 comes in contact with a work S, the elastic body 9 prevents the excessive machining performed as a result of a lowered stroke of the punch 4 due to the lengthened ram 10 and connecting rod 11 resulting from the thermal expansion by temperature rise. As a result, even though the stroke of the punch 4 is lowered below a desired position due to thermal expansion, it will be absorbed by the shrinkage of the elastic body, thereby always processing with a high accuracy to a desired depth.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は加工深さあるいは加工量
を高精度にできるプレス金型装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press die apparatus capable of highly accurately processing depth or processing amount.

【０００２】[0002]

【従来の技術】モ−タの固定子及び回転子は積層鉄心に
より製造される。積層鉄心は金属板から順送り金型装置
で打抜きした鉄心片を、当該鉄心片に設けたかしめ部を
先に打抜きされた鉄心片のかしめ部凹みに順次嵌合させ
たものである。BACKGROUND OF THE INVENTION Motor stators and rotors are manufactured from laminated cores. The laminated iron core is obtained by sequentially punching an iron core piece punched from a metal plate by a progressive die device and fitting the caulking portion provided on the iron core piece into the caulking portion recess of the previously punched iron core piece.

【０００３】かしめ部は切起し突起、Ｖ字状突起又はテ
−パ突起が知られ、これら突起を先行鉄心片の切起し
孔、Ｖ字背面孔又はテ−パ突起背面孔に夫々嵌合するよ
うになっている。これらかしめ部によるかしめ積層で
は、前記各突起は深さが各鉄心片で一定であることが積
層鉄心の真直度、鉄心片同士の密着度に大きく影響す
る。As the caulking portion, a cut-and-raised protrusion, a V-shaped protrusion or a taper protrusion is known, and these protrusions are respectively fitted to the cut-and-raised hole, the V-shaped rear face hole or the taper protrusion rear face hole of the preceding core piece. It is supposed to meet. In the crimping lamination using the crimping portions, the fact that the depth of each protrusion is constant in each core piece greatly affects the straightness of the laminated core and the degree of adhesion between the core pieces.

【０００４】鉄心片のかしめ部は、鉄心片用金属板に対
してポンチを作用させ完全に打抜きすることなく、所定
深さの形状に一部を打抜き突起を形成することでなされ
る。このプレス加工においては、他の完全打抜き加工と
同じようにプレス装置は作動により温度が上昇し、上下
動するポンチを取り付けたラムやコネクティングロッド
等が熱膨張して長くなり、加工深さが変化する。The caulking portion of the iron core piece is formed by forming a punching protrusion on a part of a predetermined depth without punching the metal plate for the iron core piece completely by punching. In this press working, like other complete punching, the temperature of the press machine rises due to the operation, and the ram or connecting rod with the vertically moving punch attached expands due to thermal expansion and the working depth changes. To do.

【０００５】前記加工深さを調整するのにスライド調整
装置がラムとコネクティングロッド間に設けられ、ラム
に取り付けたポンチの行程深さを調整するようになって
いるが、加工に基づく温度上昇の変化は加工初期、定常
加工時、或は被加工材の強度、加工程度等によって変わ
り、また、プレス作業における振動等の微妙な影響もあ
って加工深さを所望の一定値にすることが難しい。In order to adjust the working depth, a slide adjusting device is provided between the ram and the connecting rod to adjust the stroke depth of the punch attached to the ram. The change depends on the strength of the material to be machined, the strength of the material to be machined, during the steady machining, and the subtle effects of vibration during the press work make it difficult to achieve the desired machining depth. .

【０００６】[0006]

【この発明が解決しようとする課題】前記かしめ部形成
のような不完全な打抜き加工や切起し加工、さらにコイ
ニング加工等では、前述の熱膨張の影響を避けることが
難しく、不完全打抜き深さ、切起し深さ、あるいはコイ
ニングが所望値に一様にならない。その結果、かしめ強
度が変動したり、かしめ不良による積層形状が傾き真直
度が低下したりする。またコイニングの場合は残厚が変
動し形状及び強度が不均一となる。In the incomplete punching process such as the formation of the caulked portion, the cut-raising process, and the coining process, it is difficult to avoid the influence of the above-mentioned thermal expansion and the incomplete punching depth. However, the cut-and-raised depth or coining does not become uniform to a desired value. As a result, the caulking strength varies, and the laminated shape is inclined due to defective caulking, and the straightness decreases. Further, in the case of coining, the residual thickness varies and the shape and strength become non-uniform.

【０００７】本発明は、プレス装置の作動により温度が
高まり熱膨張し加工行程が変わっても、不完全打抜き加
工、切起し加工あるいはコイニングを、加工深さ、形状
あるいは残厚を精度よく加工できるプレス金型装置を目
的とする。According to the present invention, even if the temperature rises due to the operation of the press machine and the working process changes, the incomplete punching, the cut-and-raising, or the coining can be performed with a high accuracy in the working depth, shape or residual thickness. Intended for a press die device that can.

【０００８】[0008]

【課題を解決するための手段】本発明の要旨は、ラムに
取り付けたストッパ−とポンチの先端位置関係を一定と
したプレス金型装置において、前記ポンチとストッパ−
を同じラムに設けるとともに、当該ポンチ又はストッパ
−の背面部とラム間に被加工力以上のバネ係数を有する
弾性体を介在させたところにある。また、望ましくは前
記弾性体をサラバネとしたところにある。SUMMARY OF THE INVENTION The gist of the present invention is a press die apparatus in which the positional relationship between the stopper attached to a ram and the punch is constant, and the punch and the stopper are the same.
Is provided on the same ram, and an elastic body having a spring coefficient equal to or higher than the work force is interposed between the back surface of the punch or stopper and the ram. Further, it is desirable that the elastic body is a flat spring.

【０００９】[0009]

【作用】本発明は先端位置関係を一定としたストッパ−
とポンチを同じラムに設け、これらのストッパ−とポン
チの背面に被加工材の加工力以上のバネ係数を有する弾
性体を設けているので、ポンチで被加工材を不完全打抜
き加工する際、例えば温度上昇によりプレス装置のラ
ム、コネクティングロッド等の上下動部が熱膨張により
長くなり、ポンチの行程を下げ余分に加工しようとして
もストッパ−が被加工材に当接し、当該ストッパ−とポ
ンチの先端位置関係を維持したまま弾性体が変位し、そ
の加工を阻止する。而して加工深さが常に精度よく一定
となる。また、前記弾性体にサラバネを用いると装置が
使い易く、さらに加工精度もより安定化する。The function of the present invention is a stopper having a fixed tip position relationship.
And punches are provided on the same ram, and an elastic body having a spring coefficient greater than the working force of the work piece is provided on the back of these stoppers and punches, so when punching the work piece incompletely, For example, as the temperature rises, the vertical moving parts of the ram, connecting rod, etc. of the press machine become longer due to thermal expansion, and even if the punch stroke is lowered and additional processing is attempted, the stopper comes into contact with the workpiece and the stopper and punch The elastic body is displaced while maintaining the positional relationship of the tips, and its processing is blocked. Thus, the working depth is always constant with high accuracy. Further, when a flat spring is used for the elastic body, the device is easy to use and the processing accuracy is further stabilized.

【００１０】[0010]

【実施例】次に、本発明について１実施例に基づき図面
を参照して説明する。図面において、１はダイプレ−
ト、２はこの実施例では鉄心片かしめ部形成用のダイ
で、打抜き孔３が形成されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described based on one embodiment with reference to the drawings. In the drawings, 1 is a die play
In the present embodiment, g and 2 are dies for forming the caulking portion of the iron core, in which the punched holes 3 are formed.

【００１１】４はポンチで、その先端は前記打抜き孔３
に入り込み被加工材Ｓにかしめ部を形成するものであ
る。５はストッパ−で、前記ポンチ４とは互いの先端位
置関係を一定として、この実施例ではポンチ先端をスト
ッパ−先端より出した状態で、該ポンチ４とストッパ−
５は連結ボルト６を介して連結されている。なお、７は
ポンチスペ−サ−でポンチ４を再研磨した際の長さ調整
をするものである。８はスプリングプレ−トで、６ａは
前記スプリングプレ−ト８とポンチスペ−サ−７の連結
ボルトである。これらポンチスペ−サ−７とスプリング
プレ−ト８は必ずしも個別に必要なものでなく前記ポン
チ４と一体構造にしてもよい。A punch 4 has a punched hole 3 at its tip.
It is to enter and form a caulked portion on the workpiece S. Reference numeral 5 denotes a stopper, and in this embodiment, the positional relationship between the punch 4 and the punch 4 is constant, and in this embodiment, the punch 4 and the stopper 4 are in a state where the punch tip is extended from the stopper.
5 are connected via a connecting bolt 6. Reference numeral 7 is for adjusting the length when the punch 4 is re-polished with a punch spacer. Reference numeral 8 is a spring plate, and 6a is a connecting bolt between the spring plate 8 and the punch spacer 7. The punch spacer 7 and the spring plate 8 are not necessarily required individually but may be integrated with the punch 4.

【００１２】９は伸縮自在な弾性体で、被加工材の加工
に要する加工力以上のバネ常数を有していて、スプリン
グプレ−ト８の背面とラム１０の間に設けられている。
該弾性体９は、ストッパ−５が被加工材Ｓに当接するま
でポンチ４でかしめ突起を形成する際、温度上昇による
熱膨張でラム１０とコネクティングロッド１１等が長く
なり、前記ポンチ４の行程を下げ余分な加工をさせよう
とするのを防止するものである。即ち、熱膨張でポンチ
４が所定行程より下がり深く加工しようとしても、前記
弾性体９が抗してその余分な動きを吸収し一定の所望深
さに精度よく加工できる。Reference numeral 9 denotes a stretchable elastic body having a spring constant greater than the processing force required for processing the material to be processed, and is provided between the back surface of the spring plate 8 and the ram 10.
In the elastic body 9, when the punch 4 forms a caulking projection until the stopper 5 comes into contact with the workpiece S, the ram 10 and the connecting rod 11 are lengthened due to thermal expansion due to temperature rise, and the stroke of the punch 4 is increased. To prevent excessive processing. That is, even if the punch 4 is lowered from a predetermined stroke due to thermal expansion and is going to be deeply machined, the elastic body 9 resists the excessive movement and can precisely machine to a desired depth.

【００１３】前記弾性体９としてサラバネを使用する
と、前記熱膨張によるポンチ行程の変化を無理なく吸収
し、また、その寿命が長く、装置もコンパクトになる。When a spring is used as the elastic body 9, the change in punch stroke due to the thermal expansion can be easily absorbed, the life of the punch can be extended, and the apparatus can be made compact.

【００１４】この実施例では前記弾性体９をポンチ４の
背面とラム１０の間に設けたが、これに限らず、ストッ
パ−の背面とラムの間に設ける構造としてもよい。In this embodiment, the elastic body 9 is provided between the back surface of the punch 4 and the ram 10. However, the structure is not limited to this, and may be provided between the back surface of the stopper and the ram.

【００１５】[0015]

【発明の効果】本発明は前述のようにストッパ−とポン
チをその先端位置を一定関係として、同じラムに設け、
前記ストッパ−あるいはポンチの背面とラムの間に弾性
体を介在させているので、前記ラムやコネクティングロ
ッドがプレス作動により温度が高くなって熱膨張し長く
なり、前記ポンチの行程が所望位置より下がってもそれ
が弾性体の収縮で吸収され、常に所望深さの加工が精度
よくなされる。As described above, according to the present invention, the stopper and the punch are provided on the same ram with their tip positions being in a fixed relationship.
Since the elastic body is interposed between the back of the stopper or punch and the ram, the temperature of the ram and the connecting rod is increased by the pressing operation and the thermal expansion is lengthened and the stroke of the punch is lowered from the desired position. However, it is absorbed by the contraction of the elastic body, and the processing to the desired depth is always performed accurately.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の１実施例におけるプレス装置を示す
図。FIG. 1 is a diagram showing a pressing device according to an embodiment of the present invention.

【符号の説明】[Explanation of symbols]

１ ダイプレ−ト ２ ダイ ３ 打抜き孔 ４ ポンチ ５ ストッパ− ６ 連結ボルト ７ ポンチスペ−サ ８ スプリングプレ−ト ９ 弾性体 １０ ラム １１ コネクティングロッド 1 Die Plate 2 Die 3 Punch Hole 4 Punch 5 Stopper 6 Connecting Bolt 7 Punch Spacer 8 Spring Plate 9 Elastic Body 10 Ram 11 Connecting Rod

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 ラムに取り付けたストッパ−とポンチの
先端位置関係を一定としたプレス金型装置において、前
記ポンチとストッパ−を同じラムに設けるとともに、当
該ポンチ又はストッパ−の背面部とラム間に被加工力以
上のバネ係数を有する弾性体を介在させたことを特徴と
するプレス金型装置。1. A press die apparatus in which a stopper attached to a ram and a punch have a fixed tip end positional relationship, the punch and the stopper are provided on the same ram, and a back portion of the punch or the stopper and a ram are provided. A press die apparatus, in which an elastic body having a spring coefficient equal to or greater than a work force is interposed. 【請求項２】 前記弾性体がサラバネであることを特徴
とする請求項１記載のプレス金型装置。2. The press die apparatus according to claim 1, wherein the elastic body is a flat spring.