• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In a method for producing a metal base (1) for a lighter (2) for pyrotechnic systems, it is proposed that a first cup-shaped depression (6) be pressed into a first end face (3) of a metal cylinder (5), in particular a steel cylinder , wherein in a second end face (4) of the metal cylinder (5) a second cup-like depression (7) is pressed, wherein subsequently a web (8) between the cup-shaped depressions on both sides (6, 7) is removed.
    公开号:AT513238A1
    申请号:T829/2012
    申请日:2012-07-25
    公开日:2014-02-15
    发明作者:Christian Bauer；Florian Dipl Ing Smecka
    申请人:Electrovac Hacht & Huber Gmbh；
    IPC主号:
    专利说明:

    • 33775 / lh
    The invention relates to a method for producing a metal base for a lighter for pyrotechnic systems according to the preamble of claim 1.
    In airbags gas generators are included, which produce the gas required to inflate the airbag. In this case, the ignition of a fire sentence is usually provided, for which purpose a corresponding detonator is provided. Such igniters have a cylindrical body through which a conductive contact is electrically isolated. When triggering the fire sentence while the detonator is charged with the full pressure, which is caused by the fire, and which ultimately drives the gas generator and inflates the airbag. As a result, such igniters are exposed to a considerable mechanical short-term load, similar to a blow, and special demands are placed on them.
    Known detonators have base bodies, which are designed as turned parts, whereby the production of the main body with machining production techniques is time-consuming and costly.
    The object of the invention is therefore to provide a method of the type mentioned above, with which the mentioned disadvantages can be avoided, and with which a metal base can be produced, which has a high strength and low manufacturing and material costs, and with which the total load capacity a lighter can be improved.
    This is achieved by the features of claim 1 according to the invention.
    As a result, a metal base can be produced, which can be produced by chipless forming techniques. As a result, the production cost can be reduced. As a result, it is possible to produce a metal base which has higher strength or a higher load capacity compared with a metal base produced using chip-removing production techniques. As a result, with the same load capacities, a metal base can be formed which, compared to a metal base produced by machining, has smaller dimensions and lower material costs. It has been shown that the 2/23 • · · · · · · · · · · · ·
    33775 / lh
    Strength of the metal base is crucial for the overall strength or durability of a lighter, since the dimensional stability of the metal base is crucial to the durability of a glass material arranged in the passage opening. By the objective measures can be increased while the Auspresskraft such a glass material.
    The subclaims relate to further advantageous embodiments of the invention.
    The invention further relates to a lighter for pyrotechnic systems according to the preamble of claim 15.
    The object of the invention is therefore to provide a lighter for pyrotechnic systems of the aforementioned type, with which the aforementioned disadvantages can be avoided, and which has a high strength and safety and a low manufacturing and material costs.
    This is achieved by the features of claim 15 according to the invention.
    As a result, the advantageous effects set forth above for the method of manufacturing a metal base for a lighter for pyrotechnic systems can also be transferred to an igniter.
    It is hereby expressly referred to the wording of the claims, whereby the claims at this point are incorporated by reference into the description and are considered to be reproduced verbatim.
    The invention will be described in more detail with reference to the accompanying drawings, in which only preferred embodiments are shown by way of example. The show:
    1 to 7 intermediate steps in each case after individual processing steps of a first preferred embodiment of a subject method;
    8 to 14 intermediate steps in each case after individual processing steps of a second preferred embodiment of an objective method;
    15 shows a part of a first preferred embodiment of a lighter in plan view; 3/23
    FIG. 16 shows the part according to FIG. 15 in elevation with the metal base in a sectional illustration according to section A - A from FIG. 15; FIG.
    17 shows the part according to FIG. 15 before the removal of a region of the first metal pin on the first end side; and
    Fig. 18 detail C of FIG. 17.
    15 and 16 show a part of a lighter 2 for pyrotechnic systems, wherein the lighter 2 a metal base 1, in particular comprising steel, wherein in a through hole 15 of the metal base 1, a first metal pin 16 is held by a glass material 17, and wherein on a front side of the metal base 1, a second metal pin 18 is fixed, in particular soldered, wherein the metal base 1 is produced by a method described below.
    Such lighters 2 are provided in particular for so-called. Airbags in motor vehicles and are also referred to as airbag detonator. In addition, these can also be used in automatically inflating lifejackets and lifeboats, emergency slides for aircraft, belt tensioners and / or battery separation systems. Such lighters 2 are intended primarily for applications in which they have to withstand a certain amount of time after the ignition of a pyrotechnic system a pressure built up by this, without being destroyed itself, in contrast to detonators for mines or bombs.
    The lighter 2 has a metal base 1, whose structural features will be described in more detail below. In the metal base 1, a passage opening 15 is arranged. In this, a first metal pin 16 is arranged, which protrudes on one side of the metal base 1 clearly above this and forms an electrical connection pin or pin. The first metal pin 16 is held by an annularly arranged around this glass material 17 in the through hole 15 and electrically insulated by the glass material 17 and against the metal base 1. In this case, the glass material 17 is preferably fused to the first metal pin 16 and an inner surface of the through opening 15. A part of the first metal pin 16 protrudes as Zündkontaktstelle on the other side of the metal base 1 from this, or terminates flush with a first end face 3 and end face of the metal body 1 from. At the second end face 4 of the metal base 1, a second metal pin 18 is conductively attached. Preferably, the second metal pin 18 is soldered to the second end face 4 or face. The second metal pin 18 also forms an electrical connection pin or pin. Preferably, the ends of the first and the second metal pin 16, 18 at least partially coated with a noble metal, in particular gold or rhodium coated. Such a metal base 1 has typical outside dimensions in the single-digit millimeter range.
    In addition to the parts of the lighter 2 shown in FIGS. 15 to 18, an igniter or an explosive is disposed on the first end face of a complete igniter 2. The complete lighter 2 may have further features and assemblies not described.
    Hereinafter, a method of manufacturing the metal base 1 will be described.
    1 to 14 show different intermediate stages of two preferred methods for producing a metal base 1 from a metal cylinder 5. In the course of this manufacturing process, the original metal cylinder 5 is transformed further and further. In the preferred embodiments of the method, the basic shape of a rotationally symmetrical body is maintained. But it can also be provided other changes in shape. The terms first and second end face 3, 4 denote the corresponding end faces or end faces during the entire process, and refer not only to the corresponding end faces of the starting semifinished product. In the further description, the term metal cylinder 5 or component is used in part for intermediates of the process which no longer correspond to the cylinder and not yet to the finished metal base 1.
    It is preferably provided that the metal base 1 is formed comprising steel or that the metal base 1 consists of steel. In particular, high alloy stainless steels are low carbon steels, 5/23 • ···································································································· ♦ ··· ·
    33775 / lh in particular between 0.01% and 0.7%, and further provided 10% to 20% chromium and 5% to 15% nickel. In addition, the steel in question may contain other alloying constituents. It can also be provided to produce the metal base body 1 from other metals or metal alloys, in particular comprising titanium, rhenium, molybdenum or nickel, in particular nickel-based alloys.
    In the subject method, the forming of a metal cylinder 5 or one, in particular round, metal disc is provided to a metal base 1. It is provided in particular that these transformations takes place by means of a manufacturing process, which is also known as so-called. Extrusion. It is particularly preferred that the individual processing steps of the process be carried out at a temperature that includes a recrystallization temperature of the metal or metal alloy used. In the context of the use of steel, it is therefore provided in this connection that the processing steps take place at temperatures below the P-S-K line of the iron-carbon diagram, which is at 723 ° C. Particularly preferably, it is provided that the processing steps are carried out at ambient temperature, so that is dispensed with a separate heating of the semifinished product before or during processing. The heat generated by the deformation itself is usually not sufficient to heat the article to the appropriate limit temperature, especially since the tools usually used at the contact surfaces to the workpiece made of metal and dissipate the resulting heat well. Optionally, a cooling of the tools of the forming process may be provided. A preferred forming process may also be referred to as cold extrusion.
    As a starting material for the production of the metal base 1 is a metal cylinder 5 and a cylindrical metal disc. The metal cylinder 5 can be punched out of a metal strip or sheet. It is particularly preferably provided that the metal cylinder 5 is formed by cutting to length of a metal wire. As a result, 5 material loss can be virtually completely avoided in the production of the metal cylinder. In addition, this may result in the 6/23 ···· ··· ·· 33775 / lh • ············································································· · £ · · · · · · · ·
    Strength of the finished metal base 1 can be increased, since in a metal cylinder 5 produced in this way, the material fibers extend in the longitudinal direction or parallel to the axis of symmetry, and hardly any material fibers are severed by the transformations in the course of the process.
    In a method for producing a method for producing a metal base 1 for a lighter 2 for pyrotechnic systems is provided that in a first end face 3 of the metal cylinder 5, a first cup-like depression 6 is pressed, and that in a second end face 4 of the metal cylinder 5 a second cup-shaped recess 7 is pressed. Between the two cup-like depressions 6, 7, a bottom or web 8 remains, as shown for example in FIGS. 4 and 11. In a subsequent method step, it is provided that the web 8 is removed between the depressions 6, 7, which are on both sides, to form a passage opening 15.
    As a result, a metal base 1 can be produced, which can be produced by chipless forming techniques. As a result, the production cost can be reduced. As a result, a metal base 1 can be produced, which has higher strength or a higher load capacity compared to a metal base produced by machining production techniques. As a result, a metal base 1 can be formed, with the same load-bearing capacities, which has smaller dimensions and lower material expenditure compared with a metal base produced by machining. It has been shown that the strength of the metal base 1 is crucial for the overall strength or durability of a lighter 2, since the dimensional stability of the metal base 1 is crucial for the durability of a arranged in the through hole 15 glass material 17. By the objective measures can thereby also the extrusion force of such a glass material 17 can be increased.
    As a cup-like depression 6, 7 is in particular a, preferably substantially cylindrical, recess is considered, the average cross-sectional width, with a circular recess whose diameter is greater than the depth.
    It is preferably provided that the first cup-like recess 6 and the second cup are provided with the second cup and the second cupboard 737. Cup-shaped indentation 7 can be pressed in at the same time. This can be done in a single processing step.
    The two cup-like recesses 6, 7 are preferably each pressed equally deep into the metal cylinder 5, whereby it is possible that the body in question during processing in a static equilibrium. As a result, the outer area of the component is only slightly loaded during this processing, since this does not have to have a supporting effect, and must also not divert forces to a base. This is particularly easy to implement, if - as stated above - the two cup-like depressions 6, 7 are pressed simultaneously to the same depth, the respective advantages can be achieved even at different press depths, provided that a balance of power is provided.
    It is preferably provided that the first cup-like depression 6 and the second cup-like depression 7 are pressed in each case at least to a depth of one third, preferably at least 40%, of the height of the metal cylinder 5. Thereby, the thickness of the remaining web 8 can be kept low, thereby further assisting its removal. The stated height of the metal cylinder 5, and consequently the depth of the cup-like depressions, refers to the height of the respective component or metal cylinder 5 before the beginning of the relevant processing step.
    It is preferably provided that the first cup-like depression 6 and the second cup-shaped depression 7 are respectively pressed in the direction of an axis of symmetry 11 of the metal cylinder 5. As a result, a uniform load on the entire component during the manufacturing process can be achieved, with locations of local overload, which can represent subsequent failure points, can be avoided.
    As already explained, in a subsequent processing step, the web 8 is removed between the cup-shaped depressions 6, 7 on both sides. According to a particularly preferred variant of the subject method is provided that the web 8 is removed by means of punching. The term punching in this context denotes a processing operation in which the web 8 by means of 8/23 ···· ··· ··············································································· A punch from the first cup-like depression 6 is pressed out through the second cup-shaped depression 7. Since no die is provided as a counterpart to the stamp, it is not a punching operation in which a punch presses against a material which rests on a base, the die, which dictates the shape of the punched out hole. In the absence of a die, it is therefore not a punching process.
    It may be provided that during or after the removal of the web 8 at least one projecting into the through hole projection is formed. Such a projection can already be formed by the shearing of the web 8, or in a specific step. By the projection, a positive connection of the glass material to the metal base 1 can be achieved or improved, whereby the extrusion force for pressing the glass material 17 is increased from the metal base 1. If the surface irregularities formed during the removal of the web 8 already serve as a corresponding projection, a further processing step can be dispensed with.
    According to a particularly preferred embodiment of the subject method, it is provided in this connection to perform a further plastic deformation of the component in a single processing step together with the punching. In this case, according to the intermediate steps of the second preferred method illustrated in FIGS. 8 to 14, provision is made, together with the removal of the web 8, for a plastic reduction of the outer diameter of the component.
    It has been found that the properties of the metal base 1 can be further improved if further processing steps are set prior to the pressing in of the cup-like depressions 6, 7. Thus, it has been found to be particularly advantageous that the metal cylinder 5 - is plastically compressed between the first end face 3 and the second end face 4 - before pressing the first cup-shaped recess 6 and the second cup-shaped recess 7. As a result, a work hardening can be achieved, which can be determined even after the further processing steps on the finished metal base 1 by higher strength. In this case, provision is made in particular for the 9/23 ··· ··························································································. 33775 / lh
    Metal cylinder 5 is compressed to Erzeilen a predetermined work hardening or a predetermined degree of work hardening. This can be specified or measured via the offset length, for example. It has been shown that higher strength has a direct correlation to the measurable hardness, especially the Vickers hardness, so that it can be concluded directly by means of hardness measurement on the strength of the metal base 1. This is advantageous since it would not be possible to measure the tensile strength directly on such a small component. Due to the additional increase in the load capacity and strength of the metal base 1, the already mentioned extrusion force of the glass material 17 in the passage opening 15 is additionally increased.
    It has also been found to be advantageous if - before pressing the first cup-shaped recess 6 and the second cup-like recess 7 - in each end face 3, 4 each have a centering 9, 10 is introduced. In this case, provision is made in particular for the introduction or pressing in of the two centering recesses 9, 10, therefore of a first centering recess 9 and a second centering recess 10, to take place simultaneously in one processing step. It can also be provided to combine the introduction of the centering recesses 9, 10 together with the plastic compression described above. The centering recesses 9, 10 are designed in particular as flat conical depressions with blunt opening angle and low penetration depth. FIGS. 2 and 9 show the metal cylinder 5 with centering recesses 9, 10.
    After introducing the centering recesses 9, 10 is preferably provided that the first cup-like recess 6 and the second cup-like recess 7 are respectively pressed in the direction of the centering recesses 9, 10, which is supported by the Zentriermulden 9, 10.
    After removal of the web 8, further method steps are preferably provided. It is preferably provided, for example, that after the removal of the web 8, an outer side 12 of the metal cylinder 5 is plastically deformed, and in such a way a circumferentially extending shoulder 13 is formed on the outer side 12. Such a shoulder 13 may be provided, for example, to ensure a secure fit of the finished fuze 2. As a result of the production in the course of the present process by means of a plastic forming process, it is possible to obtain a 10/23 • ii ·············································································. a subsequent machining either completely omitted, or such a significantly reduced.
    After removal of the web 8 is further preferably provided that one of the end faces 3, 4 is plastically deformed, and such a paragraph 14 is formed. Such a shoulder 14 is shown in FIGS. 17 and 18. the two figures show a part of a lighter during manufacture. In this case, a part of the first metal pin 16 projects beyond the first end face 3, on which also the shoulder 14 is arranged. Shown is also typical for the glass material groove. In a further consequence, in order to form a substantially planar first end face, it is intended to remove the protruding area, wherein in particular it is intended to remove it by grinding. By the paragraph 14, the surface to be abraded can now be reduced, whereby the power requirement for producing a correspondingly flat surface can be reduced, and the abrasive requirement and the duration of the process.
    Before forming the shoulder 13 or the heel 14, provision may be made in each case for further plastic deformations which support the subsequent processing steps.
    Hereinafter, a first particularly preferred procedure will be described with reference to FIGS. 1 to 7. Fig. 1 shows the metal cylinder 5 as a starting semi-finished product. In this, a first centering recess 9 is pressed into the first end face 3, and in the second end face 4, a second centering recess 10 is pressed, as shown in Fig. 2. Subsequently, in a further processing step, the component shown in FIG. 2 is plastically compressed, wherein it can come to a significant work hardening depending on the material. In addition, the centering recesses 9, 10 are slightly recessed and widened, as shown in FIG. Subsequently, the two cup-like depressions 6, 7 are introduced. Fig. 4 shows the component after the introduction of the cup-like depressions 9, 10. In a further method step, the web 8 is removed, and thus the passage opening 15 for receiving the first metal pin 16 created. Fig. 5 shows the component after this process step. Subsequently, a shoulder 13 is formed on the outer lateral surface or outer side 12 of the component, whereby a further plastic compression of the entire component 11/23 ···· ··································································· ·· * * ·· * 33775 / lh is provided. Fig. 6 shows the correspondingly processed component. FIG. 6 also shows a circumferentially extending groove 19, which is let in on the first end face 3 and serves as preparation for the subsequent further plastic deformation, in which a shoulder 14 is introduced into the first end face 3, as shown in FIG , Finally, it can be provided to post-treat individual surfaces of the metal base 1, in particular to polish and / or coat.
    FIGS. 8 to 14 show the corresponding intermediate stages of the individual method steps of a preferred second embodiment of the method. In this case, the individual process steps are carried out substantially identical to the method described above, but it is provided in the course of the removal of the web 8 at the same time press the shoulder 13 in the outer surface. This is advantageous because the punch for removing the web 8 at the same time serves as a mandrel against which can be pressed from the outside.
    Claims: 12/23
    权利要求:
    Claims (15)
    [1]
    m · ♦ · · · · · · · · · · · · · · ··································································································································································· 33775 / lh Dl DR. FERDINAND GIBLER DR DR. WOLFGANG POTH GIBLER & POTH PATENTANWÄLTE PATENT CLAIMS 1. Method for producing a metal base (1) for a lighter (2) for pyrotechnic systems, wherein a first end face (3) of a metal cylinder ( 5), in particular a steel cylinder, a first cup-like depression (6) is pressed, wherein in a second end face (4) of the metal cylinder (5) a second cup-like depression (7) is pressed, wherein subsequently a web (8) between the two sides cup-like depressions (6, 7) is removed, to form a passage opening (15).
    [2]
    2. The method according to claim 1, characterized in that the first cup-like depression (6) and the second cup-like depression (7) are pressed in at the same time.
    [3]
    3. The method according to claim 1 or 2, characterized in that the first cup-like depression (6) and the second cup-like depression (7) are respectively pressed deep into the metal cylinder (5).
    [4]
    4. The method according to any one of claims 1 to 3, characterized in that the first cup-like depression (6) and the second cup-like depression (7) are pressed in each case at least to a depth of one third of the height of the metal cylinder (5).
    [5]
    5. The method according to any one of claims 1 to 4, characterized in that the metal cylinder (5) - before the pressing of the first cup-like depression 13/23 »♦ ······························································ •% *% * * * * ····· · 9 · · ··· ···· · # t Λ ^ 'ΤΙ " ιιι 13 33775 / lh (6) and the second cup-like depression (7) - between the first end face (3) and the second end face (4) is plastically compressed.
    [6]
    6. The method according to any one of claims 1 to 5, characterized in that - before pressing the first cup-like recess (6) and the second cup-like recess (7) - in each end face (3, 4) each have a centering recess (9, 10 ) is introduced.
    [7]
    7. The method according to claim 6, characterized in that the first cup-like depression (6) and the second cup-like depression (7) in each case in the direction of the Zentriermulden (9, 10) are pressed.
    [8]
    8. The method according to any one of claims 1 to 7, characterized in that the first cup-like depression (6) and the second cup-like depression (7) in each case in the direction of an axis of symmetry (11) of the metal cylinder (5) are pressed.
    [9]
    9. The method according to any one of claims 1 to 8, characterized in that the web (8) is removed by means of punching.
    [10]
    10. The method according to any one of claims 1 to 9, characterized in that after removal of the web (8) an outer side (12) of the metal cylinder (5) is plastically deformed, and such a circumferentially extending shoulder (13) on the outside ( 12) is formed.
    [11]
    11. The method according to any one of claims 1 to 10, characterized in that one of the end faces (3, 4) is plastically deformed, and such a shoulder (14) is formed.
    [12]
    12. The method according to any one of claims 1 to 11, characterized in that the individual processing steps are carried out at a temperature maintaining a recrystallization temperature of the metal.
    [13]
    13. The method according to any one of claims 1 to 12, characterized in that the metal cylinder (5) is formed by cutting to length of a metal wire.
    [14]
    14. The method according to any one of claims 1 to 13, characterized in that at or after the removal of the web (8) at least one. 14.2 • ··· 33775 / lh in the passage opening (15) projecting projection is formed.
    [15]
    15. An igniter (2) for pyrotechnic systems, wherein the lighter (2) has a metal base (1), in particular comprising steel, wherein in a passage opening (15) of the metal base (1) a first metal pin (16) by means of a glass material ( 17), and wherein at a front side of the metal base (1) a second metal pin (18) attached, in particular soldered, is, characterized in that the metal base (1) is produced by a method according to one of claims 1 to 14. 15/23

    (Dr. F. Gibler or Dr. W. Poth)
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA829/2012A|AT513238B1|2012-07-25|2012-07-25|Method for producing a metal base body for an igniter for a gas generator|ATA829/2012A| AT513238B1|2012-07-25|2012-07-25|Method for producing a metal base body for an igniter for a gas generator|
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