EP0338175A1 - 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
EP0338175A1
EP0338175A1 EP88730094A EP88730094A EP0338175A1 EP 0338175 A1 EP0338175 A1 EP 0338175A1 EP 88730094 A EP88730094 A EP 88730094A EP 88730094 A EP88730094 A EP 88730094A EP 0338175 A1 EP0338175 A1 EP 0338175A1
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EP
European Patent Office
Prior art keywords
sheet metal
armature
metal part
metal parts
anchor
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.)
Granted
Application number
EP88730094A
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German (de)
French (fr)
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EP0338175B1 (en
Inventor
Bernd Gugel
Johann Stempfle
Matthias Ullrich
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Vodafone GmbH
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Mannesmann AG
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Filing date
Publication date
Application filed by Mannesmann AG filed Critical Mannesmann AG
Priority to EP88730094A priority Critical patent/EP0338175B1/en
Priority to AT88730094T priority patent/ATE87545T1/en
Priority to DE8888730094T priority patent/DE3879930D1/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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Expired - Lifetime legal-status Critical Current

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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

  • the invention relates to a method for producing armatures of the electromagnetic solenoid 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.
  • 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 such as 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 to provide 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.
  • 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 interlocking connection within a manufacturing process that 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 area 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 lie outside of contact surfaces for one or more solenoid coil cores during operation of the solenoid armature system.
  • 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 the section of the armature opposite an electromagnetic coil core pole face is thicker than a section facing the pressure element, and that the form-fitting mechanical connection is provided in this section. At least one or two sheet metal parts form the anchor arms, to which the pressure element is attached.
  • the anchor manufactured as described in the introduction can be completely punched through in its mold openings with regard to a limiting sheet metal part which keeps the armature smooth on the outside, such that the outermost sheet metal part has continuous mold openings into which the projections of the next, inner sheet metal part engage.
  • 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 shaped opening 6 is not continuous in the sheet metal parts 1 and 2, but is designed as an embossing, so that a projection 8 is formed coaxially on the second sheet metal part outer surface 7.
  • the projection 8 is designed according to size, cross-sectional shape and manufacturing tolerances such that it engages in a mold opening or embossing 6 of the sheet metal molded part 1, 2 or 3 in question, and thus a positive connection is 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 placed between the form-fitting connections 10 in a surface area 14 which, in operation, lies outside of 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 depending on the possibility of attaching 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.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Impact Printers (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)

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 Elektromagnestpulen-Anker-Systems für Matrixdruckköpfe und einen Anker, insbes. einen Anker der Klappankerbauart, aus Blechformteilen, die nach Art von lamellierten Induktoren aufeinandergeschichtet werden.The invention relates to a method for producing armatures of the electromagnetic solenoid 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.

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 made essentially 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, des 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 using such laminations on anchors or hinged anchors for matrix print heads, the relatively small dimensions (anchor length e.g. approx. 25 mm; anchor thickness e.g. approx. 6 mm) force new manufacturing technologies. The use of laminated anchors, for example, requires a secure connection of the slats, because in contrast to stationary machines such as 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). With the small dimensions of the anchor, rivets are cumbersome to handle, heavy and expensive.

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 to provide 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 aufgrund hintereinander­folgender Verfahrensschritte dadurch gelöst,

  • a) daß gleichzeitig beim Stanzen der Blechformteile jeweils zumindest eine auf der ersten Blechformteil-Außenfläche ausgebildete Formöffnung bzw. Einprägung und zumindest ein dieser auf der zweiten Blechformteil-Außenfläche gegenüberleigender, in die Formöffnung eines benachbarten Blechformteils passender Vorsprung geformt wird,
  • b) daß danach die Blechformteile für einen Anker jeweils derart aufeinandergelegt werden, daß die Formöffnung bzw. die Einprägung und der Vorsprung des anliegenden Blechformteils jeweils eine formschlüssige mechanische Verbindung bilden und
  • c) daß anschließend die im Paket den Anker bildenden Blechformteile durch Kleben, thermisches Anschmelzen u.dgl. gegen Lösen der formschlüssigen Verbindung gesichert werden.
According to the invention, the object is achieved on the basis of successive method steps in that
  • a) that at the same time during the punching of the sheet metal molded parts, at least one mold opening or embossment formed on the first sheet metal molded part outer surface and at least one protrusion located opposite this on the second sheet metal molded part outer surface and fitting into the mold opening of an adjacent sheet metal molded part is formed,
  • b) that the sheet metal parts for an anchor are then 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) that then the sheet metal parts forming the anchor in the package by gluing, thermal melting and the like. secured against loosening of the positive connection.

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 interlocking connection within a manufacturing process that 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 area 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 leigen. 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 lie outside of contact surfaces for one or more solenoid coil cores during operation of the solenoid armature system. 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 der einer Elektromagnetspulenkern-Polfläche gegenüberliegende Abschnitt des Ankers gegenüber einem dem Druckelement zugewandten Abschnitt dicker ausgeführt ist und daß in diesem Abschnitt die formschlüssige mechanische Verbindung vorgesehen ist. 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 the section of the armature opposite an electromagnetic coil core pole face is thicker than a section facing the pressure element, and that the form-fitting mechanical connection is provided in this section. At least one or two sheet metal parts form the anchor arms, to which the pressure element is attached.

Der wie eingangs beschrieben hergestellte Anker kann im Hinblick auf ein begrenzendes Blechformteil, das den Anker außen glatthält, in seinen Formöffnungen völlig durchgestanzt werden, derart, daß der äußerste Blechformteil durchgehende Formöffnungen aufweist, in die die Vorsprünge des nächsten, inneren Blechformteils greifen.The anchor manufactured as described in the introduction can be completely punched through in its mold openings with regard to a limiting sheet metal part which keeps the armature smooth on the outside, such that the outermost sheet metal part has continuous mold openings into which the projections of the next, inner sheet metal part engage.

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:
  • 1 is a perspective view of the sheet metal parts punched out one behind the other in a follow-up cutting tool,
  • Fig. 2 shows a section II - II through the positive connection of the finished anchor and
  • Fig. 3 shows the finished anchor in a 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 beachbarten 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 shaped opening 6 is not continuous in the sheet metal parts 1 and 2, but is designed as an embossing, so that a projection 8 is formed coaxially on the second sheet metal part outer surface 7. The projection 8 is designed according to size, cross-sectional shape and manufacturing tolerances such that it engages in a mold opening or embossing 6 of the sheet metal molded part 1, 2 or 3 in question, and thus a positive connection is 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 vorhendener, 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 placed between the form-fitting connections 10 in a surface area 14 which, in operation, lies outside of 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 depending on the possibility of attaching 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. Verfahren zum Herstellen von Ankern des Elektromagnetspulen-Anker-­Systems für Matrixdruckköpfe, insbesondere der Klappankerbauart, aus Blechformteilen, die nach Art von lamellierten Induktoren aufeinandergeschichtet werden,
dadurch gekennzeichnet, a) daß gleichzeitig beim Stanzen der Blechformteile (1,2,3) jeweils zumindest eine auf der ersten Blechformteil-­Außenfläche (5) ausgebildete Formöffnung bzw. Einprägung (6) und zumindest ein dieser auf der zweiten Blechformteil-Außenfläche (7) gegenüberliegender in die Formöffnung (6) eines benachbarten Blechformteils (1,2,3) passender Vorsprung (8) geformt wird, b) daß danach die Blechformteile (1,2,3) für einen Anker (9) jeweils derart aufeinandergelegt werden, daß die Formöffnung bzw. die Einprägung (6) und der Vorsprung (8) des anliegenden Blechformteils (1,2,3) jeweils eine formschlüssige mechanische Verbindung (10) bilden und c) daß anschließend die im Paket (11) einen Anker (9) bildenden Blechformteile (1,2,3) durch Kleben, thermisches Anschmelzen u.dgl. gegen Lösen der formschlüssigen Verbindung (10) gesichert werden. 1. Method for producing armatures of the electromagnetic coil armature system for matrix print heads, in particular of the hinged armature type, from shaped sheet metal parts which are stacked on top of one another in the manner of laminated inductors,
characterized, a) that at the same time when punching the sheet metal parts (1, 2, 3) in each case at least one mold opening or impression (6) formed on the first metal part outer surface (5) and at least one on the second metal part outer surface (7) opposite in the molded opening (6) of an adjacent sheet metal part (1, 2, 3) is formed with a suitable projection (8), b) that the sheet metal parts (1, 2, 3) for an armature (9) are then placed one on top of the other such that the mold opening or the impression (6) and the projection (8) of the adjacent sheet metal part (1, 2, 3) each form a positive mechanical connection (10) and c) that subsequently in the package (11) an anchor (9) forming sheet metal parts (1,2,3) by gluing, thermal melting and the like. secured against loosening of the positive connection (10). 2. Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß das thermische Anschmelzen punktweise zwischen jeweils zwei benachbarten Blechformteilen (1,2,3) im Bereich der aneinandergrenzenden Blechformteil-Außenflächen (5;7) erfolgt.2. The method according to claim 1,
characterized,
that the thermal melting occurs point by point between two adjacent sheet metal parts (1, 2, 3) in the area of the adjacent sheet metal part outer surfaces (5; 7). 3. Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß das thermische Anschmelzen oder das Kleben an Flächenbereichen (14) vorgenommen wird, die im Betrieb des Elektromagnetspulen-­Anker-Systems außerhalb von Anlageflächen (15,16) für einen oder mehrer Elektromagnetspulenkerne liegen.3. The method according to claim 1,
characterized,
that the thermal melting or gluing is carried out on surface areas (14) which, during operation of the electromagnetic coil armature system, lie outside contact surfaces (15, 16) for one or more electromagnetic coil cores. 4. Anker, der nach dem Verfahren der Ansprüche 1 bis 3 hergestellt ist,
dadurch gekennzeichnet,
daß der einer Elektromagnetspulenkern-Polfläche gegenüberleigende Abschnitt (17) des Ankers (9) gegenüber einem dem Druckelement (18) zugewandten Abschnitt (9a) dicker ausgeführt ist und daß in diesem Abschnitt (17) die formschlüssige mechanische Verbindung (10) vorgesehen ist.4. Anchor, which is made by the method of claims 1 to 3,
characterized,
that the section (17) of the armature (9) opposite an electromagnetic coil core pole face is thicker than a section (9a) facing the pressure element (18) and that the positive mechanical connection (10) is provided in this section (17). 5. Anker nach Anspruch 4,
dadurch gekennzeichnet,
daß der äußerste Blechformteil (3) durchgehende Formöffnungen (6) aufweist, in die die Vorsprünge (8) des nächsten, inneren Blechformteils (1) greifen.5. Anchor according to claim 4,
characterized,
that the outermost sheet metal part (3) has continuous mold openings (6) into which the projections (8) of the next, inner sheet metal part (1) engage.
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
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
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.
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)

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

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

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Also Published As

Publication number Publication date
EP0338175B1 (en) 1993-03-31
ATE87545T1 (en) 1993-04-15
US5074687A (en) 1991-12-24
DE3879930D1 (en) 1993-05-06
JPH0211336A (en) 1990-01-16

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