DE1927519B2

DE1927519B2 -

Info

Publication number: DE1927519B2
Application number: DE1927519A
Authority: DE
Inventors: Hellmut 8500 Nuernberg Bendler; Uwe 8501 Schwaig Brede; Heinz Dipl.-Chem.Dr. 8510 Fuerth Gawlick; Hans-Heinrich Dipl.-Phys.Dr. 8501 Egersdorf Rudolph
Original assignee: Dynamit Nobel AG
Current assignee: Dynamit Nobel AG
Priority date: 1969-05-30
Filing date: 1969-05-30
Publication date: 1973-10-04
Also published as: AT310618B; FR2049699A5; NO126497B; US3785292A; NL7004719A; CH516136A; DE1927519C3; BE751024A; DE1927519A1; GB1296118A

Description

i 927 519i 927 519

3 43 4

sehen Wandler 1 in Form einer Tablette, an der sich daß eine sich infolge einer Stoßbelastung an dem pieein Amboß 2 aus metallischem Material anschließt. zoelektrischen Wandler 1 aufbauende elektrische Der piezoelektrische Wandler 1 sowie der Amboß 2 Spannung nur dann bis zum Zündsatz 8 übertragen sind mit einer zylinderförmigen Isolierschicht umge- wird, wenn ihr Wert die Schaltspannung der Vierben. Diese und die anderen Isolierteile sind als 5 '.chichtdiode 5 übersteigt. Demzufolge muß die Viersolche mit der Bezugsziffer 3 versehen. An den Am- schichtdiode 5 auf die Abmessungen und Eigenschafboß 2 schließt sich die scheibenförmige Vierschicht- ten des Zündsatzes 8 sowie der übrigen Teile des diode 5 an, die gegen das Zündergehäuse 4 isoliert Aufschlagzünders genau abgestimmt sein. Durch die ist, mit ihrer einen Hauptfläche jedoch an dem Am- Kapazitäten 42, 46 in Verbindung mit der Vierboß 2 und mit ihrer anderen Hauptfläche an einer :o schichtdiode 5 kann eine gute Leistungspassung ermetallischen Kontaklplatte 6 anliegt. An die eben- zielt werden, so daß es nicht, wie sonst üblich, erforfalls gegenüber dem Zündergehäuse 4 isolierte Kon- derlich ist, hochohmige Zündelemente zu verwenden, taktplatte 6 schließt sich der Zündsatz 8 an. Dieser ist die gegen elektrostatische Aufladungen empfindlich von einer rohrförmigen mit dem Zündergehäuse 4 sind. Beim Erfindungsgegenstand können Zündmittel in elektrischer Verbindung stehenden Distanzhülse 7 15 mit Widerstandswerten zwischen beispielsweise 20 umgeben. Die aus der Konta.-aplatte 6, den Isoliertei- und 200 Ohm zur Anwendung kommen,
len 3, der Distanzhülse 7 sowie dem elektrischen Für den Aufbau des Aufschlagzünders sowie die Zündsatz 8 gebildete Einheit ist als Detonator 9 be- Bemessung der Vierschichtdiode 5 und der anderen zeichnet. Teile, ist die Beschaffenheit, die Härte und diesee transducers 1 in the form of a tablet, to which one adjoins the pieein anvil 2 made of metallic material as a result of a shock load. The piezoelectric converter 1 and the anvil 2 voltage are only transmitted up to the primer 8 with a cylindrical insulating layer if their value exceeds the switching voltage of the four. This and the other insulating parts are 5 '.chichtdiode 5 exceeds. Accordingly, the four must be provided with the reference number 3. The disk-shaped four-layers of the ignition charge 8 and the other parts of the diode 5, which are insulated from the detonator housing 4, are precisely matched to the percussion detonator. As a result of which, however, with its one main surface on the am capacitance 42, 46 in connection with the four-boss 2 and with its other main surface on a: o layered diode 5, a good power fit can be applied to the metallic contact plate 6. At the same time, so that it is not necessary to use high-resistance ignition elements, as is otherwise customary, if necessary, condenser insulated from the igniter housing 4, the ignition set 8 is connected to the timing plate 6. This is sensitive to electrostatic charges from a tubular with the igniter housing 4 are. In the subject matter of the invention, ignition means can surround electrically connected spacer sleeves 7 15 with resistance values between 20, for example. Those from the Konta.-aplatte 6, the insulating parts and 200 ohms are used,
len 3, the spacer sleeve 7 and the electrical unit formed for the construction of the percussion detonator and the detonator 8 is designated as a detonator 9. Dimensioning of the four-layer diode 5 and the others. Parts, is the texture, the hardness and the

In F i g. 2 ist das elektrische Ersatzschaltbild des 20 Dichte sowie die Formgebi—g des Gegenlagers wich-In Fig. 2 is the electrical equivalent circuit diagram of the 20 density and the shape of the counter bearing is important.

Zünders dargestellt. Die Schaltsymbole sind dabei je- tig, gegen das der piezoelektrische Wandler 5 beimDetonator shown. The circuit symbols are used against which the piezoelectric transducer 5 in

weils mit den Bezeichnungen derjenir,?.n Bauteile ver- Aufschlag gepreßt wird. Der Verwendungsbereichbecause with the designations derjenir,?. n components, surcharge is pressed. The area of use

sehen, denen sie unmittelbar entsprechen. Man er- des Zünders wird bestimmt durch Geschoßgeschwin-see to which they directly correspond. The detonator is determined by the speed of the projectile.

kennt, daß der an einem Ende mit dem Zünderge- digkeit, Stoßwellenlaufzeit im Geschoß und Zündzeitknows that the one at one end with the detonator speed, shock wave transit time in the projectile and ignition time

häuse 4 (Masse) verbundene piezoelektrische Wand- 25 des Zünders. Versuche haben ergeben, daß der erfin-housing 4 (ground) connected piezoelectric wall 25 of the igniter. Tests have shown that the invented

ler 1 am anderen Ende über den sehr niederohmigen dungsgemäße Aufschlagzünder bei herkömmlichenler 1 at the other end via the very low-resistance proper percussion fuse in conventional

Amboß 2 mit der Vierschichtdiode 5 verbunden ist. Geschossen, beispielsweise bei Hohlladungsgeschos-Anvil 2 is connected to the four-layer diode 5. Projectile, for example in the case of shaped charge projectiles

Der Verbindungspunkt liegt über den zwischen dem sen mit Kopfhaube, in weiten Geschwindigkeitsberei-The connection point lies over the between the sen with hood, in a wide speed range

Zündergehäuse 4 und dem Amboß 2 gebildeten Kon- chen erfolgreich eingesetzt werden kann. Durch dieDetonator housing 4 and the anvil 2 formed conches can be used successfully. Through the

densator 42 an Masse. Auch zwischen dem Verbin- 30 ausschließliche Verwendung ruhender Bauelemente,capacitor 42 to ground. 30 exclusive use of static components between the connectors,

dungspunkt der Kontaktplatte 6 mit dem Zündsatz 8 die in einem gemeinsamen Baublock fest zusammen-connection point of the contact plate 6 with the primer 8, which are firmly together in a common building block.

und dem Zündergehäuse 4 liegt eine Kapazität 46. gepreßt sein können, entsteht eine hohe Zuverlässig-and the detonator housing 4 is a capacitance 46. can be pressed, a high reliability is created.

Aus der Schnittdarstellung der F i g. 1 sowie dem keit und Sicherheit sowie weitgehende Unabhängigelektrischen Ersatzschaltbild der F i g. 2 geht hervor, keit gegenüber der Richtung des Aufschlagimpulses.From the sectional view of FIG. 1 as well as security and security as well as largely independent electrical power Equivalent circuit diagram of FIG. 2 shows the speed with respect to the direction of the impact pulse.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims

Claim:

Piezoelectric percussion fuse for projectiles, with which mechanical impact energy in a piezoelectric one arranged between a counter bearing and an anvil Converter is converted into an electrical voltage to initiate an ignition charge, and the piezoelectric transducers for the purpose of ignition via an electrical switching element Threshold behavior is connected to the ignition charge, characterized in that the switching element is off in a known manner a disc-shaped four-layer diode (5) which is arranged such that to their one main surface of the anvil (2) and on its other main surface a contact plate (6) and on these, in turn, are connected to the ignition charge (8), whereby: all the aforementioned components are firmly pressed together in a common building block.

The invention relates to a piezoelectric percussion fuse for projectiles, in which mechanical Impact energy in a piezoelectric element arranged between a counter bearing and an anvil Converter is converted into an electrical voltage to initiate an ignition charge, and the piezoelectric transducer for the purpose of ignition connected to the ignition set via an electrical switching element with threshold value behavior is.

In known percussion fuses of this type (German patent specification 1 099 913) is used to initiate of the ignition charge required electrical voltage applied by a piezoelectric transducer, which as a result the mechanical impact pulse of the projectile generates an electrical voltage that is used to Ignition of the primer is sufficient. To prevent even minor knocks or bumps that are on the piezoelectric transducer exerted lead to ignition is between the piezoelectric Converter and the igniter switched on a switching spark gap, which ensures that only those electrical impulses are transmitted from the piezoelectric transducer to the detonator, their voltage amplitude exceeds a certain threshold. The individual components are in the known percussion fuse apparently arranged separately from each other and must therefore through electrical lines are connected in the form of wires. Such line connections can with bullets od. The like. Easily lead to disturbances, because they are high mechanical when the bullet hits Are exposed to stresses and before performing their actual electrical function can break.

In the case of projectile ignition devices, where ignition is initiated by closing a mechanical Switch takes place, it is known (German Auslegeschrift 1155 037), semiconductor components in Use in the form of four-layer diodes in order to trigger the ignition only when the voltage reaches a certain threshold value on the electrical circuit that builds up after a delay Has. In this projectile ignition device, too, the electrical circuit is evidently conventional in form wired discrete components. Although there is the possibility of using printed circuits provided in which the semiconductor components in the form of semiconductor wafers directly are housed in the printed circuit board, however this structure also requires the use of connecting wires, which are soldered to the printed circuit or otherwise connected to it have to.

The object of the invention is to provide a piczoelektrisi.hen To design impact detonators of the type mentioned above in such a way that any sources of interference, which are normally available in the form of mechanically moved individual components are omitted.

To solve this problem, the invention proposes that the switch element in a known Way consists of a disc-shaped four-layer diode, which is arranged so that to their one main surface of the anvil and on its other main surface a contact plate and on this in turn the ignition charge connect, with all of the aforementioned components resting in a common Building block are firmly pressed together.

Such an impact fuse has the advantage that it is constructed without the use of connecting wires can be. All components are firmly pressed together in the building block and are therefore in contact with each other without solder joints or other types of connections for the electrical contact would be required. In the event of an impact or impact, the mechanical contact is increased by pressing the components together.

The entire percussion fuse consists of individual parts that are immovably built into a housing only have to perceive electrical functions. In addition to the advantage of high operational reliability the possibility of a relatively simple series production.

The four-layer diode ensures that only such voltages reach the primer, whose amplitude exceeds a certain threshold value. Four-layer diodes are preferred used with a switching shaft of about 500 V, but depending on the area of application and Other switching thresholds come into question.

The piezoelectric percussion fuse according to the invention is characterized in particular by extensive Insensitivity to direction. This means that the ignition is initiated regardless of whether it is off which direction the mechanical impulse acts on the percussion fuse.

The invention is illustrated below with reference to the figures using an exemplary embodiment explained in more detail:

Fig. 1 shows a piezoelectric percussion fuse in longitudinal section and

F i g. 2 shows the basic circuit diagram of the percussion detonator according to FIG. 1.

The individual components of the detonator are in a cylindrical detonator housing 4, one end of which is closed, housed. The closed face serves as a counter bearing for a piezoelectric