EP0338175B1 - Manufacture of armatures for solenoid assemblies in a matrix print head, and armature of the clapper type - Google Patents

Manufacture of armatures for solenoid assemblies in a matrix print head, and armature of the clapper type Download PDF

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Publication number
EP0338175B1
EP0338175B1 EP88730094A EP88730094A EP0338175B1 EP 0338175 B1 EP0338175 B1 EP 0338175B1 EP 88730094 A EP88730094 A EP 88730094A EP 88730094 A EP88730094 A EP 88730094A EP 0338175 B1 EP0338175 B1 EP 0338175B1
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EP
European Patent Office
Prior art keywords
shaped metal
armature
metal parts
electromagnet coil
metal part
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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
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EP88730094A
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German (de)
French (fr)
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EP0338175A1 (en
Inventor
Bernd Gugel
Johann Stempfle
Matthias Ullrich
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Vodafone GmbH
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Mannesmann AG
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Publication date
Application filed by Mannesmann AG filed Critical Mannesmann AG
Priority to AT88730094T priority Critical patent/ATE87545T1/en
Priority to DE8888730094T priority patent/DE3879930D1/en
Priority to EP88730094A priority patent/EP0338175B1/en
Priority to US07/342,453 priority patent/US5074687A/en
Priority to JP1103264A priority patent/JPH0211336A/en
Publication of EP0338175A1 publication Critical patent/EP0338175A1/en
Application granted granted Critical
Publication of EP0338175B1 publication Critical patent/EP0338175B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/22—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
    • B41J2/23—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
    • B41J2/27—Actuators for print wires
    • B41J2/275—Actuators for print wires of clapper type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/02—Cores, Yokes, or armatures made from sheets

Definitions

  • Matrix printheads form a central assembly on which the performance of a matrix printer depends.
  • the design, the materials and the performance data of the matrix print heads determine the service life and thus the service life of the printer.
  • Matrix printheads are replaced as spare parts in the printer.
  • the performance of the matrix printhead is essentially determined by the system of the magnetic circuit, i.e. of the electromagnetic coil armature system.
  • the present invention is concerned with the manufacture of the anchor for both types of anchors.
  • the magnetic induction generated by the electromagnetic coil in the magnetic core also pulsates through the armature.
  • armatures made of homogeneous iron material eddy current losses result from induced voltages because the armature acts as a short-circuited winding.
  • anchors these eddy current losses help to heat them, which leads to an undesirable heating of the entire matrix printhead and also to a lower energy utilization. It is particularly disadvantageous here that the other components located in the matrix print head are also heated. Which setting temperature is often above 100 ° C.
  • anchor length e.g. approx. 25 mm; anchor thickness e.g. approx. 6 mm
  • anchor length e.g. approx. 25 mm
  • anchor thickness e.g. approx. 6 mm
  • laminated anchors requires a secure connection of the slats, because in contrast to stationary machines, e.g. Transformers or stators of electrical machines or of uniformly moving electrical machines, high acceleration forces and high deceleration forces per cycle of an armature game.
  • the invention is therefore based on the object of providing a manufacturing method for laminated anchors by means of which a permanent, e.g. during 500 million working cycles, permanent connection is created and the anchor is still light and smooth on the outside.
  • the object is achieved according to the invention in that one of the lamellae is punched out longer than the lamellae of a section which lies opposite the solenoid core pole faces and in that the pressure element is fastened to the longer lamellae.
  • Mold opening, embossing and protrusion first ensure the exact position of several sheet metal parts and thus the outline of the entire anchor. Then there is an interlocking positive connection within a manufacturing process, which includes all manufacturing stages. The positive fit is then secured to the finished anchor by an inseparable union of all sheet metal parts.
  • the resulting anchor therefore has the advantageous properties of a package and is advantageously no longer subject to the previous heating due to eddy current losses.
  • Such an anchor also has smooth pole faces.
  • the thermal melting takes place point by point between two adjacent sheet metal parts in the region of the adjacent sheet metal part outer surfaces.
  • the air gap-tight contiguity of the insulated or non-insulated sheet metal parts is used for the permanent connection.
  • Another improvement of the invention provides that the thermal melting or gluing is carried out on surface areas which, during the operation of the electromagnetic coil armature system, lie outside contact surfaces for one or more electromagnetic coil cores.
  • the undetachable connection therefore does not interfere with the mooring function and therefore does not negatively influence the anchor path.
  • the armature produced according to this is further designed in such a way that at least one of the lamellae is longer than the lamellae of a section which is opposite the solenoid core pole faces and is used to fasten the pressure element. At least one or two sheet metal parts form the anchor arms, to which the pressure element is attached.
  • the form-fitting mechanical connection is provided in a section of the armature opposite the solenoid core surfaces.
  • the individual sheet metal parts 1, 2 and 3 are punched out in their outer shape 4 in a sheet metal punching tool and at the same time provided in the punching tool, which can be designed as a follow-up cutting tool, on a first sheet metal part outer surface 5 with a mold opening 6.
  • the molded opening 6 is not continuous in the sheet metal molded parts 1 and 2, but is designed as an embossment, so that a projection 8 is formed coaxially on the second sheet metal molded part outer surface 7.
  • the projection 8 is designed in terms of size, cross-sectional shape and manufacturing tolerances in such a way that it engages in a mold opening or indentation 6 of the adjacent sheet metal molded part 1, 2 or 3, and a positive connection is thus created between two sheet metal molded parts (FIGS. 1 and 2).
  • the sheet metal parts 1, 2 and 3 stacked on top of each other result in a complete anchor 9 (FIG. 3).
  • Two projections 8 and consequently two mold openings or impressions 6 are expediently provided in the longitudinal direction of the armature 9. All the mold openings or impressions 6 and all the projections 8 result in a positive mechanical connection 10 (FIG. 2).
  • the anchor 9 (Fig. 3) thus consists of a package 11, which is held together by gluing, thermal melting or another method of a thermal nature.
  • the thermal melting takes place point by point between two adjacent sheet metal parts 1 and 1 or 1 and 2 or 2 and 1 or 1 and 3.
  • a practically existing, but negligible, small air gap 12 is used.
  • the strung melting points in the area of the sheet metal part outer surfaces 5 and 7 lead to the melting point row 13 shown in FIG. 3, which is comparable to a weld seam.
  • the melting point row 13 is set between the form-fitting connections 10 in a surface area 14 which, in operation, lies outside contact surfaces 15 and 16 of the yoke surfaces of associated electromagnetic coil cores.
  • electromagnetic coil core pole faces on armature 9 lie opposite section 17.
  • This section 17 of the armature 9 is thicker than a section 9a, the thickness of the thinner section 9a being dependent on the possibility of fastening a pressure element (e.g. a pressure needle) 18.
  • the outermost sheet metal part 3 advantageously has no projections 8, i.e. the mold opening 6 is designed as a continuous mold opening into which the projections 8 of the next inner sheet metal part 1 engage without projecting.

Abstract

In a method for the manufacture of armatures from sheet-metal parts stacked in the manner of laminated inductors, predeterminately shaped openings or indentations (6) and corresponding coaxially opposite projections (8) are defined in and during the formation of the sheet-metal parts (1, 2, 3), the sheet-metal parts are stacked so that the projections (8) nestedly engage the shaped openings or indentations (6) of the adjacent sheet-metal part (1, 2, 3) and thereby provide form-locked mechanical connections between the parts, and the stack (11) of sheet-metal shapes is secured against loosening and disengagement of the form-locked mechanical connections (10) by cementing or thermal bonding or the like of the sheet-metal parts one to another.

Description

Die Erfindung betrifft ein Verfahren zum Herstellen von Ankern des Elektromagnetspulen-Anker-Systems für Matrixdruckköpfe und einen Anker, insbesondere einen Anker der Klappankerbauart, aus Blechformteilen, die nach Art von lamellierten Induktoren aufeinandergeschichtet werden, wobei bei dem Verfahren folgende Schritte ausgeführt werden:

  • a) Gleichzeitig beim Stanzen der Blechformteile wird zumindest eine auf der ersten Blechformteil-Außenflächen ausgebildete Formöffnung bzw. Einprägung und zumindest ein dieser auf der zweiten Blechformteil-Außenfläche gegenüberliegender in die Formöffnung eines benachbarten Blechformteils passender Vorsprung geformt,
  • b) danach werden die Blechformteile für einen Anker jeweils derart aufeinandergelegt, daß die Formöffnung bzw. die Einprägung und der Vorsprung des anliegenden Blechformteils jeweils eine formschlüssige mechanische Verbindung bilden und
  • c) anschließend werden die im Paket einen Anker bildenden Blechformteile durch Kleben oder thermisches Anschmelzen gegen Lösen der formschlüssigen Verbindung gesichert.
The invention relates to a method for producing armatures of the electromagnetic coil armature system for matrix print heads and an armature, in particular an armature of the hinged armature type, from sheet metal parts which are stacked on top of one another in the manner of laminated inductors, the following steps being carried out in the method:
  • a) at the same time as the stamping of the sheet metal molded parts, at least one mold opening or embossment is formed on the first sheet metal molded part outer surface and at least one projection opposite this on the second sheet metal molded part outer surface fits into the mold opening of an adjacent sheet metal molded part,
  • b) then the sheet metal parts for an anchor are placed one on top of the other in such a way that the mold opening or the impression and the protrusion of the adjacent sheet metal part each form a positive mechanical connection and
  • c) then the sheet metal parts forming an anchor in the package are secured by gluing or thermal melting against loosening of the positive connection.

Matrixdruckköpfe bilden eine zentrale Baugruppe, von der die Leistung eines Matrixdruckers abhängt. Die Bauweise, die Werkstoffe und die Leistungsdaten der Matrixdruckköpfe bestimmen die Standzeit und damit die Lebensdauer des Druckers. Matrixdruckköpfe werden als Ersatzteile im Drucker ausgewechselt. Die Leistung des Matrixdruckkopfes wird wesentlich durch das System des Magnetkreises, d.h. des Elektromagnetspulen-Anker-Systems bestimmt. Man unterscheidet im wesentlichen sog. vorgespannte Magnetsysteme, in denen der Anker aus einer Feder besteht, und Elektromagnetspulen-Anker-Systeme der Klappankerbauart.Matrix printheads form a central assembly on which the performance of a matrix printer depends. The design, the materials and the performance data of the matrix print heads determine the service life and thus the service life of the printer. Matrix printheads are replaced as spare parts in the printer. The performance of the matrix printhead is essentially determined by the system of the magnetic circuit, i.e. of the electromagnetic coil armature system. A distinction is drawn between so-called pre-stressed magnet systems, in which the armature consists of a spring, and electromagnetic coil armature systems of the hinged armature type.

Die vorliegende Erfindung beschäftigt sich mit der Herstellung des Ankers sowohl für die eine als auch die andere Ankerbauart. Die durch die Elektromagnetspule im Magnetkern erzeugte magnetische Induktion durchsetzt pulsierend auch den Anker. Bei Ankern aus homogenem Eisenwerkstoff entstehen daher durch induzierte Spannungen Wirbelstromverluste, weil der Anker als kurzgeschlossene Wicklung wirkt. Diese Wirbelstromverluste tragen bei Ankern dazu bei, diesen zu erwärmen, was zu einer unerwünschten Erwärmung des gesamten Matrixdruckkopfes führt und außerdem zu einer geringeren Energieausnutzung. Besonders nachteilig ist hierbei, daß die sich im Matrixdruckkopf befindenden anderen Bauteile miterwärmt werden. Die sich einstellende Temperatur beträgt nicht selten über 100° C.The present invention is concerned with the manufacture of the anchor for both types of anchors. The magnetic induction generated by the electromagnetic coil in the magnetic core also pulsates through the armature. In the case of armatures made of homogeneous iron material, eddy current losses result from induced voltages because the armature acts as a short-circuited winding. In the case of anchors, these eddy current losses help to heat them, which leads to an undesirable heating of the entire matrix printhead and also to a lower energy utilization. It is particularly disadvantageous here that the other components located in the matrix print head are also heated. Which setting temperature is often above 100 ° C.

Bekanntermaßen können derartige Wirbelstromverluste durch Unterteilen des Eisenkörpers in dünne Bleche, die gegeneinander isoliert sind (z.B. durch einseitige Papierbeklebung oder Lackierung) und durch Verwendung von siliziumhaltigen Eisen, das einen höheren elektrischen Widerstand aufweist (legierte Dynamobleche) kleingehalten werden.As is known, such eddy current losses can be kept small by dividing the iron body into thin sheets which are insulated from one another (e.g. by one-sided paper gluing or painting) and by using silicon-containing iron which has a higher electrical resistance (alloyed dynamo sheets).

Bei der Anwendung derartiger Lamellierungen auf Anker bzw. Klappanker für Matrixdruckköpfe zwingen die relativ kleinen Abmessungen (Ankerlänge z.B. ca. 25 mm; Ankerdicke z.B. ca. 6 mm) zu neuen Herstelltechnologien. So erfordert die Anwendung lamellierter Anker eine sichere Verbindung der Lamellen, weil es sich im Gegensatz zu ruhenden Maschinen, wie z.B. Transformatoren oder Statoren von Elektromaschinen oder von gleichförmig bewegten elektrischen Maschinen, um hohe Beschleunigungskräfte und um hohe Verzögerungskräfte pro Zyklus eines Ankerspiels handelt.When such laminations are used on anchors or hinged anchors for matrix printheads, the relatively small dimensions (anchor length e.g. approx. 25 mm; anchor thickness e.g. approx. 6 mm) force new manufacturing technologies. For example, the use of laminated anchors requires a secure connection of the slats, because in contrast to stationary machines, e.g. Transformers or stators of electrical machines or of uniformly moving electrical machines, high acceleration forces and high deceleration forces per cycle of an armature game.

Es ist schon vorgeschlagen worden, die aufeinandergeschichteten Blechformteile mittels Nieten miteinander zu verbinden (EP-A1-0 152 117). Bei den kleinen Abmessungen des Ankers sind Nieten jedoch umständlich handhabbar, schwer und teuer.It has already been proposed to connect the sheet metal parts stacked one on top of the other by means of rivets (EP-A1-0 152 117). Given the small dimensions of the anchor, rivets are cumbersome to handle, heavy and expensive.

Es ist bekannt (EP 0 152 117 A2), nach dem eingangs zitierten Verfahren hergestellte Anker des Elektromagnetspulen-Anker-Systems für Matrixdruckköpfe, insbesondere der Klappankerbauart, aus Blechformteilen, die nach Art von lamellierten Induktoren aufeinandergeschichtet werden, herzustellen. Die bekannten lamellierten Anker sind jedoch mittels Stiften mit Nietköpfen zusammengehalten, und für die Befestigung des Druckelementes sind zwei äußere Lamellen bis an den Ort der Anbringung des Druckelementes geführt. Dadurch entstehen relativ schwere Anker, die für höhere Frequenzen bei schnellschreibenden Matrixdruckköpfen weniger geeignet sind. Außerdem ist das bekannte Aufeinanderschichten von einzelnen Lamellen bei sehr kleinen Ankern nicht mehr wirtschaftlich durchführbar und kann daher bei der Herstellung sehr großer Anzahlen von Matrixdruckköpfen nicht mehr eingesetzt werden.It is known (EP 0 152 117 A2) to manufacture armatures of the electromagnetic coil armature system for matrix printheads, in particular of the hinged armature type, produced by the method cited at the beginning from shaped sheet metal parts which are stacked on top of one another in the manner of laminated inductors. However, the known laminated anchors are held together by means of pins with rivet heads, and for the fastening of the pressure element, two outer lamellae are guided to the place where the pressure element is attached. This creates relatively heavy anchors that are less suitable for higher frequencies with fast-writing matrix printheads. In addition, the known stacking of individual slats with very small anchors is no longer economically feasible and can therefore no longer be used in the production of very large numbers of matrix printheads.

Das Herstellverfahren gemäß den eingangs bezeichneten Merkmalen a), b) und c) ist ebenfalls bekannt (DE-Gebrauchsmuster 18 82 073 U1). Derartige geblechte Schaltmagnete für elektromagnetische Schaltgeräte nehmen jedoch wenig Rücksicht auf das Gewicht, und außerdem wird der Anker relativ selten zu Schaltzwecken bewegt, so daß hier die Betätigung durch hohe Frequenzen und damit geringe Massen und entsprechende wirtschaftliche Herstellung keine große Rolle spielen.The manufacturing process according to the features a), b) and c) mentioned above is also known (DE utility model 18 82 073 U1). Such laminated switching magnets for electromagnetic switching devices, however, take little account of the weight, and moreover the armature is moved relatively rarely for switching purposes, so that the actuation by high frequencies and thus low masses and corresponding economical production do not play a major role.

Der Erfindung liegt daher die Aufgabe zugrunde, ein Herstellverfahren für lamellierte Anker zu schaffen, durch das eine dauerhafte, z.B. während 500 Mio. Arbeitsspielen, beständige Verbindung geschaffen wird und der Anker trotzdem leicht und außen glatt ist.The invention is therefore based on the object of providing a manufacturing method for laminated anchors by means of which a permanent, e.g. during 500 million working cycles, permanent connection is created and the anchor is still light and smooth on the outside.

Die gestellte Aufgabe wird erfindungsgemäß dadurch gelöst, daß eine der Lamellen länger ausgestanzt wird als die Lamellen eines Abschnitts der den Elektromagnetspulenkern-Polflächen gegenüberliegt und daß das Druckelement an der längeren Lamelle befestigt wird.The object is achieved according to the invention in that one of the lamellae is punched out longer than the lamellae of a section which lies opposite the solenoid core pole faces and in that the pressure element is fastened to the longer lamellae.

Formöffnung, Einprägung und Vorsprung sichern zunächst die genaue Lage mehrerer Blechformteile und somit den Umriß des ganzen Ankers. Sodann entsteht eine ineinandergreifende formschlüssige Verbindung innerhalb eines Fertigungsvorganges, der sämtliche Fertigungsstufen umfaßt. Die Formschlüssigkeit wird danach am fertigen Anker durch eine unlösbare Vereinigung sämtlicher Blechformteile gesichert. Der entstandene Anker hat daher die vorteilhaften Eigenschaften eines Pakets und unterliegt vorteilhafterweise nicht mehr der bisherigen Erwärmung durch Wirbelstromverluste. Außerdem weist ein solcher Anker glatte Polflächen auf.Mold opening, embossing and protrusion first ensure the exact position of several sheet metal parts and thus the outline of the entire anchor. Then there is an interlocking positive connection within a manufacturing process, which includes all manufacturing stages. The positive fit is then secured to the finished anchor by an inseparable union of all sheet metal parts. The resulting anchor therefore has the advantageous properties of a package and is advantageously no longer subject to the previous heating due to eddy current losses. Such an anchor also has smooth pole faces.

In Weiterbildung der Erfindung ist vorgesehen, daß das thermische Anschmelzen punktweise zwischen jeweils zwei benachbarten Blechformteilen im Bereich der aneinandergrenzenden Blechformteil-Außenflächen erfolgt. Hier wird für die unlösbare Verbindung das luftspaltenge Aneinandergrenzen der isolierten oder nichtisolierten Blechformteile ausgenutzt.In a further development of the invention it is provided that the thermal melting takes place point by point between two adjacent sheet metal parts in the region of the adjacent sheet metal part outer surfaces. Here, the air gap-tight contiguity of the insulated or non-insulated sheet metal parts is used for the permanent connection.

Eine andere Verbesserung der Erfindung sieht vor, daß das thermische Anschmelzen oder das Kleben an Flächenbereichen vorgenommen wird, die im Betrieb des Elektromagnetspulen-Anker-Systems außerhalb von Anlageflächen für einen oder mehrere Elektromagnetspulenkerne liegen. Die unlösbare Verbindung stört deshalb die Anliegefunktion nicht und beeinflußt daher auch nicht den Ankerweg negativ.Another improvement of the invention provides that the thermal melting or gluing is carried out on surface areas which, during the operation of the electromagnetic coil armature system, lie outside contact surfaces for one or more electromagnetic coil cores. The undetachable connection therefore does not interfere with the mooring function and therefore does not negatively influence the anchor path.

Der danach hergestellte Anker ist weiterhin dahingehend gestaltet, daß zumindest eine der Lamellen Länger ausgebildet ist als die Lamellen eines Abschnitts, der den Elektromagnetspulenkern-Polflächen gegenüberliegt und zur Befestigung des Druckelementes dient. Zumindest ein oder zwei Blechformteile bilden die Ankerarme, an denen das Druckelement befestigt ist.The armature produced according to this is further designed in such a way that at least one of the lamellae is longer than the lamellae of a section which is opposite the solenoid core pole faces and is used to fasten the pressure element. At least one or two sheet metal parts form the anchor arms, to which the pressure element is attached.

Nach weiteren Merkmalen ist vorgesehen, daß die formschlüssige mechanische Verbindung in einem Elektromagnetspulenkern-Polflächen gegenüberliegendem Abschnitt des Ankers vorgesehen ist.According to further features, it is provided that the form-fitting mechanical connection is provided in a section of the armature opposite the solenoid core surfaces.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. Es zeigen:

Fig. 1
eine perspektivische Ansicht der in einem Folgeschnittwerkzeug hintereinander ausgestanzten Blechformteile,
Fig. 2
einen Schnitt II - II durch die Formschlußverbindung des fertigen Ankers und
Fig. 3
den fertigen Anker in perspektivischer Ansicht.
An embodiment of the invention is shown in the drawing and will be described in more detail below. Show it:
Fig. 1
2 shows a perspective view of the sheet metal parts punched out one behind the other in a subsequent cutting tool,
Fig. 2
a section II - II through the positive connection of the finished anchor and
Fig. 3
the finished anchor in perspective view.

Die einzelnen Blechformteile 1, 2 und 3 werden in einem Blechstanzwerkzeug in ihrer äußerern Form 4 ausgestanzt und gleichzeitig im Stanzwerkzeug, das als Folgeschnittwerkzeug ausgeführt sein kann, an einer ersten Blechformteil-Außenfläche 5 mit einer Formöffnung 6 versehen. Die Formöffnung 6 ist bei den Blechformteilen 1 und 2 nicht durchgehend, sondern als eine Einprägung ausgeführt, so daß auf der zweiten Blechformteil-Außenfläche 7 koaxial ein Vorsprung 8 entsteht. Der Vorsprung 8 ist nach Größe, Querschnittsform und Herstelltoleranzen derart beschaffen, daß dieser jeweils in eine Formöffnung bzw. Einprägung 6 des benachbarten Blechformteils 1,2 oder 3 passend eingreift und somit zwischen jeweils zwei Blechformteilen eine Formschlußverbindung geschaffen ist (Figuren 1 und 2). Die Blechformteile 1, 2 und 3 ergeben aufeinandergeschichtet einen vollständigen Anker 9 (Fig. 3).The individual sheet metal parts 1, 2 and 3 are punched out in their outer shape 4 in a sheet metal punching tool and at the same time provided in the punching tool, which can be designed as a follow-up cutting tool, on a first sheet metal part outer surface 5 with a mold opening 6. The molded opening 6 is not continuous in the sheet metal molded parts 1 and 2, but is designed as an embossment, so that a projection 8 is formed coaxially on the second sheet metal molded part outer surface 7. The projection 8 is designed in terms of size, cross-sectional shape and manufacturing tolerances in such a way that it engages in a mold opening or indentation 6 of the adjacent sheet metal molded part 1, 2 or 3, and a positive connection is thus created between two sheet metal molded parts (FIGS. 1 and 2). The sheet metal parts 1, 2 and 3 stacked on top of each other result in a complete anchor 9 (FIG. 3).

Zweckmäßigerweise sind jeweils zwei Vorsprünge 8 und demzufolge zwei Formöffnungen bzw. Einprägungen 6 in Längsrichtung des Ankers 9 vorgesehen. Sämtliche Formöffnungen bzw. Einprägungen 6 und sämtliche Vorsprünge 8 ergeben eine formschlüssige mechanische Verbindung 10 (Fig. 2).Two projections 8 and consequently two mold openings or impressions 6 are expediently provided in the longitudinal direction of the armature 9. All the mold openings or impressions 6 and all the projections 8 result in a positive mechanical connection 10 (FIG. 2).

Der Anker 9 (Fig. 3) besteht somit aus einem Paket 11, das durch Kleben, thermisches Anschmelzen oder ein anderes Verfahren wärmetechnischer Art zusammengehalten wird. Das thermische Anschmelzen erfolgt punktweise zwischen jeweils zwei benachbarten Blechformteilen 1 und 1 bzw. 1 und 2 bzw. 2 und 1 bzw. 1 und 3. Hierbei wird ein praktisch vorhandener, aber vernachlässigbarer kleiner Luftspalt 12 ausgenutzt. Die aneinandergereihten Schmelzpunkte im Bereich der Blechformteil-Außenflächen 5 und 7 führen zu der in Fig. 3 ersichtlichen Schmelzpunktreihe 13, die mit einer Schweißnaht vergleichbar ist.The anchor 9 (Fig. 3) thus consists of a package 11, which is held together by gluing, thermal melting or another method of a thermal nature. The thermal melting takes place point by point between two adjacent sheet metal parts 1 and 1 or 1 and 2 or 2 and 1 or 1 and 3. Here, a practically existing, but negligible, small air gap 12 is used. The strung melting points in the area of the sheet metal part outer surfaces 5 and 7 lead to the melting point row 13 shown in FIG. 3, which is comparable to a weld seam.

Die Schmelzpunktreihe 13 ist zwischen den formschlüssigen Verbindungen 10 in einem Flächenbereich 14 angesetzt, der im Betrieb außerhalb von Anlageflächen 15 und 16 der Jochflächen von zugehörigen Elektromagnetspulenkernen liegt. Solchen (nicht gezeichneten) Elektromagnetspulenkern-Polflächen liegt am Anker 9 ein Abschnitt 17 gegenüber. Dieser Abschnitt 17 der Ankers 9 ist gegenüber einem Abschnitt 9a dicker, wobei die Dicke des dünneren Abschnitts 9a sich nach der Befestigungsmöglichkeit eines Druckelementes (z.B. einer Drucknadel) 18 richtet.The melting point row 13 is set between the form-fitting connections 10 in a surface area 14 which, in operation, lies outside contact surfaces 15 and 16 of the yoke surfaces of associated electromagnetic coil cores. Such (not shown) electromagnetic coil core pole faces on armature 9 lie opposite section 17. This section 17 of the armature 9 is thicker than a section 9a, the thickness of the thinner section 9a being dependent on the possibility of fastening a pressure element (e.g. a pressure needle) 18.

Der äußerste Blechformteil 3 trägt vorteilhafterweise keine Vorsprünge 8, d.h. die Formöffnung 6 ist als eine durchgehende Formöffnung ausgebildet, in die die Vorsprünge 8 des nächsten inneren Blechformteils 1 eingreifen, ohne vorzustehen.The outermost sheet metal part 3 advantageously has no projections 8, i.e. the mold opening 6 is designed as a continuous mold opening into which the projections 8 of the next inner sheet metal part 1 engage without projecting.

Claims (5)

  1. A method for producing armatures of the electromagnet coil-armature system for matrix print heads, in particular of the hinged armature variety, from shaped metal parts which are piled up on one another in the manner of laminated inductors, in which
    a) simultaneously upon cutting the shaped metal parts (1, 2, 3) in each case at least one shaped opening or impression (6) formed on the outer surface (5) of the first shaped metal part and at least one projection (8) which lies opposite said opening or impression on the outer surface (7) of the second shaped metal part and which fits into the shaped opening (6) of an adjacent shaped metal part (1, 2, 3) is formed,
    b) then the shaped metal parts (1, 2, 3) for an armature (9) are each laid one on top of another such that the shaped opening or the impression (6) and the projection (8) of the shaped metal part (1, 2, 3) in contact therewith each form a positive mechanical connection (10) and
    c) then the shaped metal parts (1, 2, 3) which form an armature (9) in a stack (11) are secured against detachment of the positive connection (10) by gluing or thermal fusing,
    characterised in that one of the lamellae (2) is cut longer than the lamellae (1, 3) of a section (17) which lies opposite the electromagnet coil core pole faces and that the print element (18) is attached to the longer lamella (2).
  2. A method according to Claim 1, characterised in that the thermal fusing takes place spot-wise between two adjacent shaped metal parts (1, 2, 3) in each case in the repion of the adjoining outer surfaces (5; 7) of the shaped metal parts.
  3. A method according to Claim 1, characterised in that the thermal fusing or the gluing is carried out on surface regions (14) which during the operation of the electromagnet coil-armature system lie outside contact surfaces (15, 16) for one or more electromagnet coil cores.
  4. An armature for matrix print heads of the electromagnet coil-armature system, consisting of shaped metal parts (1, 2, 3) which are piled up on one another in the manner of laminated inductors, have a shaped opening or impression (6) which is formed on the first outer surface (5) of the shaped metal part and a projection (8) which fits on the second outer surface (7) of an adjacent shaped metal part (1, 2, 3), which form a positive mechanical connection (10) and the shaped metal parts are secured by gluing or thermal fusing, characterised in that one of the lamellae (2) is longer than the lamellae (1, 3) of a section (17) which lies opposite the electromagnet coil core pole faces and serves for attaching the print element (18).
  5. An armature according to Claim 4, characterised in that the positive mechanical connection (10) is provided in a section (17) of the armature (9) which lies opposite the electromagnet coil core pole faces.
EP88730094A 1988-04-22 1988-04-22 Manufacture of armatures for solenoid assemblies in a matrix print head, and armature of the clapper type Expired - Lifetime EP0338175B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT88730094T ATE87545T1 (en) 1988-04-22 1988-04-22 PROCESS FOR MANUFACTURING ARMATURES OF THE ELECTROMAGNETIC COIL ARMATURE SYSTEM FOR MATRIX PRINT HEADS AND ARMATURES, ESPECIALLY. THE FOLDING ANCHOR DESIGN.
DE8888730094T DE3879930D1 (en) 1988-04-22 1988-04-22 METHOD FOR PRODUCING ANCHORS OF THE ELECTROMAGNET COIL ANCHOR SYSTEM FOR MATRIX PRINT HEADS AND ANCHORS, ESPECIALLY. THE FOLDING DESIGN.
EP88730094A EP0338175B1 (en) 1988-04-22 1988-04-22 Manufacture of armatures for solenoid assemblies in a matrix print head, and armature of the clapper type
US07/342,453 US5074687A (en) 1988-04-22 1989-04-21 Armature of an electromagnet-coil/armature system for dot matrix print heads, and method of manufacturing same
JP1103264A JPH0211336A (en) 1988-04-22 1989-04-21 Manufacture of armature of electromagnet-armature mechanism and armature

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP88730094A EP0338175B1 (en) 1988-04-22 1988-04-22 Manufacture of armatures for solenoid assemblies in a matrix print head, and armature of the clapper type

Publications (2)

Publication Number Publication Date
EP0338175A1 EP0338175A1 (en) 1989-10-25
EP0338175B1 true EP0338175B1 (en) 1993-03-31

Family

ID=8200552

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88730094A Expired - Lifetime EP0338175B1 (en) 1988-04-22 1988-04-22 Manufacture of armatures for solenoid assemblies in a matrix print head, and armature of the clapper type

Country Status (5)

Country Link
US (1) US5074687A (en)
EP (1) EP0338175B1 (en)
JP (1) JPH0211336A (en)
AT (1) ATE87545T1 (en)
DE (1) DE3879930D1 (en)

Cited By (2)

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DE10257014A1 (en) * 2002-12-06 2004-07-08 Tally Computerdrucker Gmbh Dot matrix print head has a laminated armature with the middle lamination plate acting as an armature arm for print needle cap activation with the end of said plate having a thickened section for contact with the print needle
US7861402B2 (en) 2005-06-29 2011-01-04 Siemens Aktiengesellschaft Method for production of a pole face of a metallic closing element of an electromagnet

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US5269610A (en) * 1989-11-20 1993-12-14 Fujitsu Limited Armature design in a wire matrix printing head
ATE103538T1 (en) * 1989-12-18 1994-04-15 Mannesmann Ag MATRIX PRINT HEAD, IN PARTICULAR SERIAL DOCUMENT MATRIX PRINT HEAD.
US7070405B2 (en) 2002-08-01 2006-07-04 Molecular Imprints, Inc. Alignment systems for imprint lithography
US7314323B2 (en) 2003-09-03 2008-01-01 Toshiba Tec Kabushiki Kaisha Wire dot printer head and wire dot printer
US7008126B2 (en) * 2003-09-04 2006-03-07 Toshiba Tec Kabushiki Kaisha Wire dot printer head and wire dot printer
US7172351B2 (en) 2004-01-26 2007-02-06 Toshiba Tec Kabushiki Kaisha Method for manufacturing an armature
JP2005254665A (en) 2004-03-12 2005-09-22 Toshiba Tec Corp Armature, wire dot printer head and wire dot printer
JP2005254663A (en) * 2004-03-12 2005-09-22 Toshiba Tec Corp Wire dot printer head and wire dot printer
JP4562406B2 (en) * 2004-03-12 2010-10-13 東芝テック株式会社 Wire dot printer head and wire dot printer
JP2005254732A (en) 2004-03-15 2005-09-22 Toshiba Tec Corp Wire dot printer head and wire dot printer
JP4515121B2 (en) 2004-03-15 2010-07-28 東芝テック株式会社 Wire dot printer head and wire dot printer
JP2005262803A (en) * 2004-03-22 2005-09-29 Toshiba Tec Corp Manufacturing method of yoke, yoke, wire-dot printer head and wire-dot printer
JP4473021B2 (en) 2004-03-22 2010-06-02 東芝テック株式会社 Nitride layer forming method, magnetic circuit forming member, armature, wire dot printer head, and wire dot printer
JP4628689B2 (en) 2004-03-23 2011-02-09 東芝テック株式会社 Wire dot printer head and wire dot printer
JP4589023B2 (en) 2004-03-23 2010-12-01 東芝テック株式会社 Armature, wire dot printer head and wire dot printer
JP4904826B2 (en) * 2006-01-19 2012-03-28 リコープリンティングシステムズ株式会社 Printing device
US11155056B2 (en) * 2019-04-08 2021-10-26 The Boeing Company Methods of making laminated metallic structures

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
DE10257014A1 (en) * 2002-12-06 2004-07-08 Tally Computerdrucker Gmbh Dot matrix print head has a laminated armature with the middle lamination plate acting as an armature arm for print needle cap activation with the end of said plate having a thickened section for contact with the print needle
DE10257014B4 (en) * 2002-12-06 2005-12-01 Tally Computerdrucker Gmbh Matrix needle printhead for computer printers, in particular printhead type printhead
US7861402B2 (en) 2005-06-29 2011-01-04 Siemens Aktiengesellschaft Method for production of a pole face of a metallic closing element of an electromagnet
US8421567B2 (en) 2005-06-29 2013-04-16 Siemens Aktiengesellschaft Method for production of a pole face of a metallic closing element of an electromagnet

Also Published As

Publication number Publication date
JPH0211336A (en) 1990-01-16
US5074687A (en) 1991-12-24
DE3879930D1 (en) 1993-05-06
EP0338175A1 (en) 1989-10-25
ATE87545T1 (en) 1993-04-15

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