JP6000132B2 - Metal fixing material bush and method of manufacturing core material of metal fixing material bush - Google Patents

Description

  The invention relates in particular to a metal fixing material bush comprising the features of the inclusion part of claim 1, and more particularly to a method for manufacturing a core of a metal fixing material bush comprising the feature of the inclusion part of claim 23.

  Various designs of metal fastener bushings are known in the art. By means of a metal fixing bush, a vacuum hermetic seal made of a fixing material, in particular a vacuum hermetic seal from glass to metal, is understood. Metal acts as an electrical conductor. See typically US Pat. Such bushings are common in terms of electronic and electrical engineering. Glass used for sealing or sealing serves as an insulator. A typical metal fastener bushing is constructed such that a metallic inner conductor is contained within a pre-formed sintered glass part, so that the sintered glass part or glass tube in the outer metal part is so-called. Sealed with core material. For example, an igniter is a suitable application for such a metal fixture bush. This igniter is used, inter alia, for airbags or belt extension pulleys in automobiles and the like. In this case, the metal fixing material bush is a component of the ignition device. In addition to the metal fixture bush, the entire igniter includes a spark plug and a gunpowder together with a metal cover that encloses the ignition mechanism. One, two, or more than three metal pins can be passed through the bush. In the preferred embodiment with one metal pin, the caging is grounded, and in the preferred two pole embodiment, one of the pins is grounded. The ignition device described above is used in particular for airbags or belt extension pulleys in motor vehicles. Known devices of the type mentioned or similar are described in US Pat. Nos. 3,4,5, or 6, the disclosures of which are fully incorporated herein. The previously mentioned ignition unit has two metal pins. However, the electronic igniter can also have only a single pin. The igniter shown in the industry standard comprises a metal core, for example a metal sleeve, which is configured as a swivel part. The metal core represents at least one slot through which at least one metal pin passes. One significant problem with this design is the fact that such designs are material and cost intensive.

US Pat. No. 5,345,872 US Pat. No. 3,274,937 US Pat. No. 6,274,252 US Pat. No. 5,621,183 German Patent Publication No. 2904 174A1 German Patent Publication No. 19927 233A1

  Therefore, the present invention is characterized by greater strength at lower material and labor expenditures, suitability for greater stresses, based on the objective of creating a metal anchor bushing of the type mentioned at the beginning, and further, To avoid assembly errors resulting from inaccurate matching of the individual elements.

  The solution of the invention is characterized by the features of claim 1. An example implementation of the technique for the manufacture of the core is described in claim 34. Useful developments are reproduced in the dependent claims.

  The metal anchor bush includes a metal core through which at least one metal pin is passed. If two metal pins are provided in the preferred embodiment, one of these two metal pins at least directly or indirectly establishes a ground connection with the core material via an additional element. . In an embodiment comprising two metal pins, these metal pins are preferably arranged parallel to each other. At least one of the metal pins is disposed in a slot in the core material and is secured to the core material by a fixing material, preferably in the form of a glass plug. According to the invention, the core is formed by a sheet metal element, whereby in the first embodiment at least the slot is created by another process, in particular punching. The core material itself is preferably formed by punching (punching) a solid material, but the final shape of the core material is held by a molding process such as a deep drawing method. In a preferred embodiment, the final shape defining the outer contour and the basic shape defining the slot are created by at least one other process, in particular punching. What the final shape means is that there is no need to perform any further molding operations on it. What the basic shape means is that it represents the final shape in the absence of further essential changes, or whether the changes can still be contracted to the basic shape by further manufacturing methods, in particular molding methods. So that the final shape is not achieved until after these additional methods. Means are provided between the front and the rear to avoid relative movement of the fixing material in the direction of the rear facing the inner circumference of the slot. These means may be an integral component of the core material or may form a component unit with the core material.

  The production of the shape by another processing means that the final shape with respect to the outer periphery of the core material is created by blanking and the shape of the slot is created by punching. Means for avoiding relative movement of the fixing material in the direction of the rear facing the inner periphery of the slot are intended to control the difficulty arising from sealing of a single metal pin in the slot, And provided for safety purposes against the withdrawal of metal pins. These means operate as a kind of barb and lead to a definite locking between the fixing plug, in particular the glass plug and the core, during relative movement in the rear direction. These may include, for example, at least one local contraction in the slot, thereby providing the entire area of the inner periphery except the front of the core.

  The solution of the present invention makes it possible to rely on more cost effective and efficient manufacturing methods and starting materials, thereby considerably minimizing the raw materials. In addition, the entire core is designed or designed as an integral component, in which metal pins are sealed with a fixing material. Another significant advantage is that extrusion of metal pins with glass plugs from port slots is safely prevented even under increased loads, such as pressure loads, for a single metal pin. The overall design builds smaller with respect to width and can also be applied to smaller sizes through the guarantee of the coupling and fixing of the metal pins within the core material even with larger loads.

  What is decisive in processing is that there is local shrinkage in the cross section in the rear region or in the region between the rear and the front, so that the front is always larger. Characterized by diameter.

  According to a particularly beneficial design, the second metal pin is grounded or stopped as a ground pin on the back of the core. As a result of this, an additional measure of grounding the metal pin fixed in the core with a fixing material or electrically coupling it to the core is no longer necessary. Furthermore, the presence of only one pin to be fixed in the slot makes the possibility of fixing that single pin completely circumferentially more variable and the potential connection surface to the ground pin is expanded. Can be done.

  For example, glass plugs, ceramic plugs, glass-ceramic plugs, or high performance polymers can be used as a fixing material.

  There are a number of possibilities for the specific development of the means for preventing relative movement, in particular slipping, between the fixing and the slot. These are characterized by measures on the heartwood. In the simplest case, the measures on the core depend on what can be embodied in manufacturing, in particular what is embodied during punching. In processing, the slot between the rear and front is characterized by a change in cross-sectional profile. In the simplest case, at least two regions of variable inner dimensions are provided as slots with a circular cross section having a variable diameter in the design. In processing, the cross-sectional change can occur in multiple stages or continuously. In the latter case, the slot between the front and rear becomes tapered in the design, narrowing the slot towards the rear. The measures on the core are in principle further characterized by the provision of several recesses or protrusions (projections). They are freed from such undercuts by forming at least one undercut disposed between the rear and front when viewed from the inner periphery of the slot in the core. In the symmetrical structure of the slot, this includes a first subregion extending from the rear to the front, a second subregion connected to the first subregion, and a third extending from the front to the rear. Characterized by three subregions with subregions. The second subregion is characterized by a smaller or larger slot diameter than the first and second subregions. Then, preferably, the first and second subregions are characterized by equivalent cross-sectional dimensions.

  In implementations with more than two regions of variable dimensions, in particular variable diameter, the method resulting from processing both sides of the core is selected. In the previously described implementation, if an asymmetrical shape of the slot is intended, an embodiment with three or more regions is preferably chosen, which is an evolution of the slot, which can be in any manner with respect to the mounting position. Can be used. This is relative to the theoretical center line running perpendicular to the pin axis of the metal pin in the core material, and extends symmetrically in the central region of the core material. Thereby, the front and rear can also be exchanged with respect to their function. The undercut formed by these counteracts possible movement of the anchor plug in both directions.

  According to a further design, there can also be a large number of circumferentially arranged projections spaced apart from each other on a common length between the front and rear. These are in principle created by stamping (molding or stamping), ie by molding under pressure in the rear region. The manufacturing process is thus particularly cost effective.

  Another option for preventing relative movement between the fixture plug and the port is to form a definitive connection between them. For example, typically glass is placed in an opening with a metal pin and the glass and metal ring are heated so that after cooling, the metal heat shrinks onto the glass plug. In general, the slot essentially represents the final diameter after punching of the slot. Of course, the punched slot itself is machined and polished, for example, without significant changes in the final diameter. The slot may have a circular cross section. Other possibilities such as oval are also conceivable.

  In accordance with a further advantageous development for additionally preventing relative movement under load between the metal pin and the fixing material, measures on the metal pin are provided. In this process, this can be a protrusion or recess extending over the entire circumference of the metal pin, or it can be randomly or fixedly pre-defined in a circumferential direction. With a raised protrusion.

  The method for producing the core material of the metal bush is obtained by another processing without processing from a sheet metal part having a predefined end profile defining the outer shape. Achieving the basic shape that defines the form of the slot for the formation of the slot is done for at least one metal pin by stamping (punching) a sheet metal part. In processing, both operations can be cost-saving, a single tool and a single processing step. The undercut in the slot is expanded by deformation of the slot such as stamping. A single stamping operation can be undertaken before or after the punching operation. Preferably, the stamping and punching operations are performed on the same face of the core material to avoid unnecessary work in progress and these steps are performed immediately from one to the other.

  Corresponding to the desired shape to be achieved, the stamping operation is performed on either one or both sides, in the latter case preferably the equivalent stamping parameters are set, Ensure a symmetric realization of the slots.

  The solution of the present invention is described in detail below with reference to the drawings.

FIG. 1a illustrates a first embodiment of a metal anchor bush designed according to the present invention, and FIGS. 1b to 1e are greatly simplified of the basic principle of the method according to the invention for producing a core material according to the invention. A schematic diagram is shown. FIG. 2a illustrates a second embodiment of a metal fastener bushing according to the present invention with a slot taper design, and FIGS. 2b-2c illustrate the present invention for manufacturing a core material according to FIG. 2a after a punching operation. Figure 2 illustrates a further embodiment of the method according to the invention. FIG. 3 illustrates a third embodiment of a metal fastener bushing according to the present invention with a partially tapered slot design. FIG. 4 illustrates an embodiment of a metal fastener bushing designed in accordance with the present invention with a protrusion between the front and rear in the contour defining the slot. FIG. 5 illustrates an embodiment of a metal fastener bushing designed in accordance with the present invention with a recess between the front and rear in the contour defining the slot. FIG. 6 illustrates an embodiment of a metal fastener bushing designed in accordance with the present invention with additional protrusions on the metal pin. FIG. 7 illustrates a further development according to FIG. FIG. 8 illustrates a further embodiment of a metal fastener bushing designed in accordance with the present invention with a single point intensive shrinkage of the cross section in the rear region. FIG. 9 illustrates an embodiment of a metal fastener bushing designed in accordance with the present invention with a surface pattern in the slot. FIG. 10 illustrates a further alternative embodiment of a metal fastener bushing designed in accordance with the present invention. FIG. 11 illustrates an embodiment with metal pins such as so-called mono pins.

  FIG. 1a illustrates a first embodiment of a metal anchor bush 1 for an igniter of an airbag, for example, designed according to the invention with an axial section. This comprises a core 3 forming a metal collar 2 in which two parallel metal pins 4 and 5 are electrically coupled. These two metal pins 4 and 5 are arranged so as to be parallel to each other. In processing, one acts as a conductor and the second pin is grounded. In this display example, the first metal pin 4 operates as a conductor, and the metal pin 5 operates as a ground pin. At least one of these metal pins, in particular, the metal pin 4 operating as a conductor is passed through the core material 3. In the case of the display example, the ground pin 5 is directly bonded to the rear portion 12 of the core material 3. For this purpose, the metal pin 4 is partly sealed with a fixing member 34 on a glass plug 6 which is cooled from molten glass, with a part l1 of its length l. The metal pin 4 projects at least with respect to one side on the surface 7 of the glass plug 6 and is sealed in the same plane as the second surface 8 of the glass plug 6 in the illustrated embodiment. Other variations are also conceivable. Preferably, not only the slot but also the core 3 is designed as a punched element 9 (punch element). What this means is that the contour, in particular the shape that defines the outer periphery 10, is created by blanking, preferably punching. The punch portion can be used in its shape as it is after the punching operation, or can be deformed, for example, deep drawn by further operations. A slot 11 provided for receiving and fixing the metal pin 4 by means of a glass plug 6 is created in the preferred embodiment by a punching operation in the form of a slot. Subsequently, the metal pin 4 is inserted into the rear part 12 of the metal fixing material bush 1 together with the glass plug in the slot 11, and the metal plate including the glass plug and the metal pin is heated, and after the cooling operation, the metal Heat shrink, thus forming a non-deterministic connection between the glass plug 6 with the metal pin 4 and the core 3. It is also conceivable to insert a molten or fluidized fixing material, in particular the molten glass of the front part 13 into the slot 11. During cooling, a definite and substantial connection built into the material is provided both between the outer periphery 14 of the metal pin 4 and between the inner periphery 15 of the slot 11. In the case of stress (deformation action) of the all-metal fixing material bush 1 during ignition, in order to prevent loosening of the metal pin 4 with the glass plug 6 from the core material 3, it is between the fixing material 34 and the inner periphery 15 of the slot. Means for preventing relative movement in the direction of the rear part 12, which means here indicated by 35. These act somewhat as barbs, between the core 3 and the glass plug 6 under tension and / or under pressure against the glass plug 6 and / or the metal pin 4. Full locking is provided and the associated slip is prevented at the rear 12. For this purpose according to the first embodiment, the slot 11 is designed with an undercut 36 formed by a protrusion 37. This protrusion is provided in the region of the rear portion 12 and in the case of the display example, it approaches so as to be flush with the rear portion. In the case of the display example, the slot 12, which is preferably designed with a circular cross section, is characterized through this projection 37 by two different diameters d1 and d2. The diameter d1 is larger than d2. The diameter d2 is a diameter at the rear portion 12 of the slot 11. The diameter d1 is the diameter at the front portion 13 of the slot 11. Thereby, the slot 11 is finished over a fairly large part of its length ld1 with the same diameter d1. ld2 represents the design of the slot 11 with the diameter d2. That is, the slot has two subregions, a first subregion 16 and a second subregion 17, where the first subregion 16 is characterized by a diameter d1 and the second subregion 17 is characterized by a diameter d2. Yes. These diameters, as represented in FIGS. 1 b and 1 c, are the front part 13 or the rear part with subsequent deformation work, particularly under the action of pressure such as stamping (molding or embossing) on the core material 3. It is created by a slot-shaped single-side stamping operation on the 12 side surfaces. Preferably, the punching and deforming operations are each performed from the same side, and in a typical example, are performed from the front portion 13. Blanking of the core material 3 can also be performed within a system of cutting work such as punching work or preceding water jet cutting or laser beam cutting. Preferably, however, this is done by punching. The tool for this purpose is designed in such a way that the entire core material 3 with slots 11 can be punched in one processing step of a sheet metal 38 of a specific sheet thickness b corresponding to the thickness D of the core material 3.

  FIGS. 1 b to 1 e show, in a schematic and simplified representation, the basic principle of the method of the invention for the production of the core material 3 with the required shape. FIG. 1 b shows, in a schematic simplified representation, the design of a punching tool 39 consisting of two auxiliary tools, one bottom part in the form of a mold 40 and one top part in the form of a punch 41. . In the processing, the punch 41 moves toward the sheet metal 38 lying on the base 10. The feed direction is specified by the arrow. From this, the resulting core 3 'with respect to the final outer shape after punching and the shape of the slot 11' is reproduced in FIG. 1c. The core 3 'undergoes further stamping operations in this state and at this position, in particular to achieve the shape of the slot 11 shown in FIG. 1a with the undercut 36 formed by the protrusion 37. The stamping tool 42 is applied to the front 23 of the core 3 'and is activated from the side of the front 12 in the direction of the rear 12 with respect to the slot 11 "that appears after punching. The front 13 in the final state of the core 3 The activation depth t1 characterizing the distance from the undercut 36 to the undercut 36 is assured during processing by the form of the stamping tool 42 and the stamp depth adjusted thereby, or also only through the stamp depth. Shows the position of the stamping tool 42 towards the final core 3 'after successful stamping, so that in this state the core 3' corresponds to the core 3. The metal finish is during manufacturing. Characterize the condition of the element to be machined.To achieve optimal stamping results, a metal material with good flowability at a selected pressure shock is made of sheet metal or thin. Used as an element, preferably CuNi alloy, Al alloy, Ni alloy, or Fe alloy is used as the metal, such as stainless steel, CRS1010, construction steel, or Cr-Ni steel. The use of steel is particularly preferred.

  In the embodiment shown in FIGS. 1a to 1e, the slot 11 has a circular cross section. However, other forms are also conceivable, in which case the undercut is formed by changing the inner dimension of the opening. Furthermore, the displayed shape is idealized and reproduced. For example, in practice, surface areas that are not completely orthogonal to one another are developed in principle. Critically, it is justified that the basic contour from which the slot is created prevents receipt of the sealed metal pin and prevents the outward movement of the metal pin and especially the fixing material such as the glass plug. In other words, the various surface regions forming the undercut and the adjacent various surface regions can be arranged orthogonal to each other.

FIG. 2a illustrates a further design of the core material 3.2 with axial resection through the metal anchor bushing 1.2. The basic structure of the metal fixing material bush 1.2 corresponds to that described in FIG. 1, and therefore the same reference symbols are used for the same elements. In the embodiment according to FIG. 2a, the slot 11.2 adopts a tapered design. In the processing, the diameter d is uniformly reduced as it proceeds from the front portion 13.2 to the rear portion 12.3. The uniform reduction in this diameter in the form of a cone implements means 35 (not shown) for preventing relative movement between the anchoring material and the inner periphery 15 of the slot.

FIG. 2b shows the core 3 produced after punching the outer contour and then punching the through opening . 2 'is illustrated. Slot 11 . 2 'can be seen to have equivalent dimensions throughout. FIG. 2 c illustrates a stamping tool 43 having a tapered design and acting against the core 3 ′ according to FIG. 2 b from the front 13.2 against the mold 44. In contrast, FIG. 3 discloses a combination of implementations according to FIGS. 1 and 2, in which only a part of the slot 11.3 has a tapered design. In this embodying example, the slot 11.3 of the metal fixing material bushing 13 is particularly divided into even two sections of the first sub-region 1 6及 beauty second subregion 1 7 during heartwood 3.3. The second sub-region 1 7 is characterized by a constant diameter d2.3 over its length Ld2.3. This second subregion 17 extends from the rear part 12.3 towards the front part 13.3. The first subregion 16 is characterized by a constant cross-sectional reduction of the slot 11.3. This reduction occurs from the diameter d1.3 to the diameter d2.3. The small diameter at the rear 12.2 and 12.3 according to the embodiment of FIGS. 2 and 3 makes the advantage of the larger connecting surface 18 especially for metal pins 5.2 or 5.3 such as ground pins. Has brought. Undercut 36.3 is generated based on the diameter change when viewed toward the first sub-region 1 6 from the second sub-region 17.

  In all of the embodiments shown in FIGS. 1 to 3, when considering the front 13 to the rear 12, the asymmetric shape of the slot 11 is the slip of the glass plug 6 at the rear 12 or toward the rear. And has the advantage of preventing drawers. In addition, during assembly, as a result of the asymmetric shape, an easier positioning of the individual elements, in particular the metal pins 4 and 5, relative to the mounting position is possible. Based on the undercut, loosening of the structural unit consisting of the metal pin 4 and the glass plug 6 to the core during ignition can be avoided. The additional substrate at the rear 12 provides the advantage of a larger connecting surface for the metal pin 4.5 to be grounded. This further increases the strength of the glass seal of the metal pin during a pressure impact on the front.

  FIGS. 4 and 5 illustrate two further implementations of metal fastener bushes 1.4 and 1.5 according to the present invention with slots 11.4 and 11.5. In these implementations, the slot 11 can be further divided into three sub-regions. In the case of the embodiment according to FIG. 4 for the sub-regions 20, 21, 22 the first and third sub-regions 20 and 22 are preferably characterized by the same diameter d20 and d22. The second sub-region 21 is characterized by a diameter d21 smaller than the diameters d20 and d22, and accordingly, a projection 23 is formed. This projection forms an undercut 36.4 located between the front and rear, and a glass plug 6.4 in the direction of the rear 12.4 facing the inner circumference 15.4 of the slot 11.4. Prevent relative movement. In particular, the surfaces 24 and 25 directed towards the front part 13.1 and the rear part 12.2 form a stop surface in the axial direction of the glass plug 6.4. This embodiment is characterized by the fixation of the glass plug 6.4 in both directions, and this development is specially designed to be randomly integrated and positionable, especially with respect to the connection of the metal pins 4.4. Adapted in a beneficial manner.

  This applies in particular to analogs to the development of the metal anchor bush 1.5 represented in FIG. This development is also divided into at least three sub-regions, each of which is shown here as 20.5, 21.5, 22.5 to define a recess 26, which is the rear 12. 5 and the front 13.5. The two outer sub-regions, ie, the first sub-region 20.5 and the third sub-region 22.5, form process protrusions 27 and 28. The surfaces 29 and 30 of the individual separate projections 27 and 28 facing each other form a stop for the cooling glass plug 6.5 with respect to the shift between the rear part 12.5 and the front part 13.5 in processing. Yes. Both of these implementations result in an increase in the required hydrostatic force and trigger shear on those parts of the glass plug 6 during pressure loading.

  All of the solutions described so far result in a narrower core 3 with an equivalent or increased seal produced by the glass plug 6 compared to solutions known in the art. It is possible to use.

  The production of the core material 3.4 according to FIG. 4 is performed by punching the core material 3 ′ having slots 11 ′ with a constant diameter. Protrusion is achieved by double-sided stamping with a stamping tool having a predefined stamp depth after punching and a diameter larger than the actual diameter of the slot 11 '. When the flow limit is exceeded, under the action of the stamping tool, based on the increase of the surface tension of the material with respect to the core material 3 ′, the material flows, which forms the protrusions 23. This is regardless of whether the stamping operation is first performed from either the front or back of the core during machining.

  If a symmetrical design is desired, the stamping force and stamp depth should be selected equally for both sides. This effective implementation also applies to analogs for the formation of core material according to FIG. Again, in the first machining step, the outer shape of the core material 3.5 'with the slot 11.5' is punched (punched with a punch). The two protrusions 27 and 28 in the region of the front part 12 and the rear part 13 are formed by the pressure activated against the front part 12 and the rear part 13 in the core material 3.5 '. The expressed form of the recess in the machining is idealized.

  If FIGS. 4 and 5 show various measures on the core material 3.4 or 3.5, in particular these slots 11.3 for preventing the relative movement of the glass plug 6 towards the slots 11.4 and 11.5. 4 and 11.5, FIG. 6 and FIG. 7 show that the glass plug 6.6. Alternatively, various countermeasures are provided for the metal pins 4.6 or 4.7 that serve to prevent the metal pins 4.6 or 4.7 from coming off from 6.7. FIG. 6 represents a combination of the implementation shown in FIG. 1 with an additional modification of the metal pin 4.6. The pin 4.6 has at least one protrusion in the region of connection with the core material 3.6, which is indicated by 31 and extends in the circumferential direction around the outer periphery 32 of the pin 4.6. In the embodiment shown here, there is a problem with the protrusion 31 extending around the entire outer periphery 32 of the metal pin 4.6. This protrusion can be formed by compression or tightening (squeezing) of the metal pin 4.6. Other possibilities not shown here include the arrangement of several protrusions that are circumferentially adjacent to one another, preferably with equal spacing on the metal pin 4.6 in the connection region with the core material 3.6. Are arranged adjacent to each other. The feature of the protrusion on the metal pin 4.6 contributes considerably to improving the strength of the connection. This feature prevents the metal pin 4.6 from falling off during a corresponding test where the metal pin normally fails due to stretching stress and glass plug removal. This is true for analogs to the development according to FIG. According to this development, the metal pin 4.7 has a number of protrusions arranged in series connected from above the axial extension of the slot in the contact area with the molten glass. In the simplest case, a decorative groove 33 is used. With this decorative groove, the same effect can be achieved as described in FIG. The remaining structure is consistent with that described in FIG. 6 and the same reference symbols are used for the same elements.

  The embodiment described in FIGS. 6 and 7 can also be combined with measures such as in particular slots on the core shown in FIGS.

  FIG. 8 describes a development in which the slot 11.8 has the same diameter over the entire length between the rear part 12 and the front part 13, so that the core material 3.8 in the region of the rear part 12.8. Exposed to stamping. This is done by pressurizing the rear 12.8, so that this pressurization is concentrated at a point in the circumferential region of the slot 11.8. This pressure impact occurs following the pressure run on the rear 12.8. As a result, protrusions aligned in line with the metal pin 4.8 are formed over the entire circumference of the slot 11 and the protrusions have a pressure ratio in the slot 11 from the front 13.8 to the rear 12.8. It has a decisive influence on it. In the case of the illustrated example, protrusions 37.81 and 37.82 arranged in the circumferential direction at equal intervals are created. The glass plug 6.8 can here be a compression piece.

  FIG. 9 is an embodiment in which the inner circumference of the slot 11.8 is characterized by a substantially constant average diameter d1, and additionally, the inner circumference of the slot 11.8 in the core 6.8. An embodiment in which the outer periphery of 15.8 or glass plug 6.9 is subjected to surface treatment, and in particular, the holding effect on glass plug 6.8 is achieved by being subjected to surface processing treatment such as sandblasting or contamination. An example is shown. In machining, roughness values in the region of μ ≧ 10 μm are achieved. Roughening the surface serves the purpose of the mating and supports strength. In the embodiment shown in FIG. 9, preferably all of the inner circumference 15 of the slot 11.5 undergoes a corresponding surface treatment. There is also the possibility of limiting the surface treatment to only one sub-region, so that it extends at least in the region of the rear 12.9.

  In addition, the glass plug inserted into the core can be further surrounded by a socket. The surface of the slot and / or socket and / or the metal pin can then be roughened.

  FIG. 10 illustrates a further alternative development. In this development, the slot 11.9 is characterized by a larger diameter d2 in the region of the rear 12.9 than the front 13.9. This embodiment allows the slot 11.9 to be designed even within the thicker core 3.9. The slot 11.10 is, for example, punched only in the subregion 45.10 or punched. The second subregion 48.10 is formed in both embodiments, for example, by punching out this subregion 46.10. In the punched subregion 46.10, the glass plug 6.10 is inserted and supported with the metal pin 4.10. In order to insert at least one slot, in particular by punching out the core material, generally all of the possibilities specified in the description for FIGS. 1 to 9 include inserting this slot into the first sub-region of the core material and Suitable for roughing the region, for example by punching a core material. A glass plug 6 with metal pins can then be inserted into the first or second subregion as described in FIGS. All of the exemplary embodiments described above include a metal fastener bushing that includes two metal pins and is preferably arranged in parallel so that one of the metal pins is grounded at the rear of the core. Although mentioned, the present invention is also applicable to three or more metal pins and so-called mono pins in principle. A mono pin is an ignition unit that includes only a single metal pin and is held by a pin support. The pin itself includes, for example, a metal ring that forms a ground connection.

Such a mono pin is shown in FIG. The pin support 100 includes a metal pin 103, which is preferably embedded in an insulating panel 104 made of glass. As for the pin support, the inner wall panel 101. With socket 101.2 with twelve . The end of the sealed portion of the metal pin 103 is connected to the bridge 10 . 5 is electrically connected to the core material 101.1. Slot 10 . 6 is arranged in the core material by, for example, a punching step. Such slots can be placed in the core as previously described in FIGS. Along with the slot, the core 101.1 can be stamped as described above. Preferably the slot is punched together with the core material. Particularly preferably, the core material forms an integral component with a socket 101.2. The production of an integral component can occur, for example, by having a punch cut out in a single technique step, and the socket can be obtained by deep drawing.

  Preferably, the inner wall panel of the socket is coated with the free end of the metal pin 103. For example, gold is used as a coating material. Preferably the coating is applied using an electrolytic technique. The coating serves the purpose of keeping the electrical resistance at the junction 108 between the plug 120 inserted into the socket and the interior 101.1.2 of the socket 101.2 low. This plug is designated 120 in the figure.

  In all of the implementations represented in FIGS. 1 to 10, the core 3 as a swivel in the implementation according to the level of the industry is replaced by stamped metal parts. Individual measures for preventing the metal pin 4 from being pulled out of the core under stress are provided on the core 3 in the individual drawings to prevent the metal pin from being pulled out of the fixing material on the metal pin. And can be used in combination with each other. In this regard, the implementation is not subject to any restrictions. However, these implementations aim to ensure a high strength of the overall connection between the metal pin 4 and the core material 3 and hence the metal fixing bush 1.

  With all of the implementations shown in the accompanying drawings, the slot can be formed with a variable cross-section. However, preferably a circular cross section is selected. The formation of the undercut occurs as an integral component of the core material.

1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9 Metal fixing material bush 2 Metal collar 3, 3.2, 3.3 3.4, 3.5, 3.6, 3.7, 3.8, 3.9 Core 3 ', 3.2' Core 4, 4, 4.2, 4.3 as a semi-finished product during manufacture 4.4, 4.5, 4.6, 4.7, 4.8, 4.9 Metal pin 5 Metal pin 6, 6.2, 6.3, 6.4, 6.5, 6.6 6.7, 6.8, 6.9 Glass plug 7 First surface 8 Second surface 9 Punched element 10 Perimeter 11, 11.2, 11.3, 11.4, 11.5, 11 .6, 11.7, 11.8, 11.9 Slots 11 ′, 11.2 ′ Slots 12, 12.2, 12.3, 12.4, 12.5, 12.6, 12. 7, 12.8, 12.9 Rear part 13, 13.2, 13.3 13.4, 13.5, 13.6, 13.7, 13.8, 13.9 Front part 14 Outer periphery 15 Inner periphery 16 First subregion 17 Second subregion 19 Connecting surface 20, 20.5 First Sub-regions 21, 21.5 Second sub-region 22, 22.5 Third sub-region 23 Projection 24 Surface 25 Surface 26 Recess 27 Projection 28 Projection 29 Surface 30 Surface 31 Projection 32 Recess 33 Opening 34 Fixing material 35 Fixing material and slot Material 36, 36.2, 36.3, 36.4, 36.5, 36.6, 36.7, 36.8 for preventing relative movement between inner circumferences Undercut 37, 37.3 , 37.4, 37.5, 37.6, 37.7, 37.81, 37.82 Protrusion 38 Sheet metal 39 Punching tool 40 Die 41 Punch 42 Stamping tool 43 Stamping tool 44 Die 45 First subregion 46 Second Subregion 100 Pin support 1 1.1 Core material 101.2 Core material socket 101.2.1 Socket inner wall panel 103 Metal pin 105 Bridge 106 Slot 108 Joint point 120 Plugs d1, d3 inserted in the socket d1, d2.3 diameter d1, diameter ld1 Length ld2 length ld1.3 length ld2.3 length

Claims (9)

A method of manufacturing a metal fixing material bush for an igniter of an air bag or a belt tension pulley, wherein the metal fixing material bush is:
A metal core having a front portion and a rear portion;
And one of the metal pin located within one through opening in said core,
Wherein arranged in the through opening, a front Symbol glass for receiving and fixing the one of the metal pins or ceramic fixing material,
With
The core material, the metal pin, and the fixing material are in direct contact with explosives,
The method
Forming the core material with one element created by punching ;
The through opening, a step to appear build by Pas Nchingu processing and stamping,
Including
The through opening has a circular through opening;
Wherein the through-openings, in at least some areas from the previous SL front to the rear side is formed in a symmetrical conical with respect to the axial direction of the metal pin,
The method
Wherein said means for preventing relative movement of fixing material, Ru provided between the front SL front and the rear step in the direction of the rear with respect to the inner periphery of the through opening,
The means provides a coupling and shape coupling between the anchoring material and the core material under the action of a pulling force and / or under pressure against the anchoring material;
The coupling acts by heating and cooling the core material and the fixing material, and then the core material thermally shrinks on the fixing material,
It said shape coupling is to prevent pre SL relative movement, the cross-sectional area of the through opening is intended to reduce the pre-SL front to said rear,
The method
Sealing the metal pin in the fixing material;
Heating the core material and the fixing material;
Cooling the core material and the fixing material such that the core material thermally shrinks onto the fixing material;
including,
Way . The metal fixing material bushing comprises at least one further metal pins are arranged parallel to the metal pin,
The method of claim 1. The through-opening is characterized by two regions: a first region extending from the front portion toward the rear portion, and a second region extending from the rear portion toward the front portion;
A protrusion is formed by the second region characterized by an inner dimension smaller than the first region;
The first and / or the second region have different shapes and / or different inner dimensions over their length;
The first region and / or the second region are arranged in a conical shape,
The method according to claim 1 or 2. Further comprising the step of polishing the front SL core,
4. A method according to any one of claims 1 to 3. Means are provided on the metal pin for preventing relative movement of the metal pin with respect to the fixing material.
5. A method according to any one of claims 1 to 4. Means for preventing relative movement of the metal pin with respect to the securing member includes a plurality of protrusions axially adjacent to each other on the metal pin and arranged radially.
The method of claim 5. The core material is made of the following materials:
Cu-Ni alloy,
Al alloy,
Ni alloy,
Fe alloy,
Stainless steel,
CRS1010 ,
C r-Ni steel,
Made from one of,
7. A method according to any one of claims 1-6. The core material, Ru obtained predefined thickness of the sheet metal part or al,
8. A method according to any one of the preceding claims . A final contour that forms image of the external shape of the core obtained by the punching, a cylindrical through-opening which is formed before the through-opening is coined, is one of the processing in the punching form by tool Created in steps,
The method of claim 8.

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