• 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:
    The invention relates to a laminated core (3) and a method for joining sheet metal parts (2) to a laminated core (3), in which sheet metal parts (2) of a sheet metal strip (5) with an at least partially, in particular on both hinge sides (6, 7 ) of the sheet-metal strip (5) provided curable polymeric adhesive layer (8, 9), in particular baked enamel, separated, in particular punched, the sheet metal parts (2) with facing adhesive-coated sides provided one above the other and bonded to form a laminated core (3) under pressure. In order to provide advantageous process conditions, it is proposed that at least one of the adhesive layers (8, 9) facing one another during material-locking joining of the sheet metal parts (2) comprises a mixture (14) comprising water and a thermoplastic, in particular water-soluble, adhesion promoter (15), is provided.
    公开号:AT512931A4
    申请号:T50576/2012
    申请日:2012-12-11
    公开日:2013-12-15
    发明作者:Ronald Dipl Ing Dr Fluch
    申请人:Voestalpine Stahl Gmbh；
    IPC主号:
    专利说明:

    12-12-2012 [EÖ14 ho 2012/50576 -1 -
    The invention relates to a method for joining sheet metal parts to a sheet metal päket, in which sheet metal parts of a sheet metal strip with a at least partially, especially on both sides of the strip band provided curable polymeric adhesive layer, in particular baked paint, separated, in particular punched, the sheet metal parts with each other facing adhesive-coated sides provided one above the other and are materially connected to form a laminated core under pressure.
    In order to connect sheet metal parts with a coating of baked enamel to a laminated core cohesively, it is known from the prior art (WO2012 / 059588 A1) to heat the baked enamel by heat and thus to activate this under pressure with subsequent sheet metal parts or to glue their baked enamel. In addition, the adhesive layers between the sheet metal parts of a final curing, for example, in an oven, subjected to ensure mechanical stability of the laminated core, which can be used as a stator / rotor of electrical machines at high speeds use. The disadvantage of such a production requires a considerable amount of time and energy.
    It is therefore the object of the invention, starting from the above-described prior art, to provide a method with which a stable laminated core can be produced energy-efficiently. In addition, the process should be able to be carried out reproducibly and provide advantages through its rapid time sequence.
    The invention solves this problem by providing a mixture containing water and a thermoplastic, in particular water-soluble, adhesive on at least one of the adhesives facing each other when joining the sheet-metal parts facing the adhesive , Bonding agent, is provided.
    If, on at least one of the adhesive layers facing one another in the cohesive joining of the sheet metal parts, a mixture comprising water and a thermoplastic adhesion promoter, special measures for curing the laminated core can be dispensed with and an energy-saving sheet metal package can be created. Namely, it has surprisingly been found that the water wetting of the adhesive layer under reaction with the adhesion promoter can produce a sufficiently pretreated boundary layer with which another adhesive layer or the adhesion promoter of the other adhesive layer can bond. The assembly of the sheet metal parts under pressure according to the invention can now be sufficient to ensure a mechanically strong cohesive connection between the adhesive layers. These advantages are particularly evident in adhesive layers of baked enamel, which at least partially plasticized with the aid of water and thus show a particularly strong reaction with the thermoplastic adhesion promoter, especially if it consists of polyvinyl alcohol. In addition, a particular water-soluble adhesion promoter can be particularly distinguished to provide a bonding agent layer in nanoscale layer thickness on the adhesive layer in order to ensure a comparatively high reactivity during joining under pressure. Since, in contrast to the prior art, a sufficient mechanical stability of the laminated core can be ensured even by the cohesive joining under pressure, hardening of the adhesive layers, in particular of the baked enamel, of the laminated core within the scope of its use is also conceivable. A heat generated by power loss electrical machines may well be sufficient to complete the curing of the laminated core. The inventive method can therefore not only reproducible stable sheet metal packages are produced, it can thereby be made possible with relatively low energy consumption cost-effective production. -3- -3- [10 2012/50576 iPrinted: 12-12-2012
    In general, it is mentioned that under the name Backiack it is known that polyvinyl butyral, polyamide, polyesters, modified polyamides etc. can be classified. Furthermore, it is generally mentioned that adhesion promoters can be understood to mean all substances which are used to improve the adhesion of composites.
    The process conditions can be further simplified by the mixture is dried before the cohesive joining of the sheet metal parts. Thus, not only the distribution of the bonding agent or its layer thickness can be set securely, these parameters remain guaranteed even when assembling the sheet metal parts under pressure.
    If the mixture is applied to the sheet-metal strip before a separation of the sheet metal parts, an application of the bonding agent can be ensured even in edge areas of the sheet metal parts. Such a full-surface wetting of the adhesive layer can thus lead to mechanically particularly resilient laminated cores.
    The sheet metal parts can be added procedurally if the bonding agent is activated immediately prior to the cohesive joining of the sheet metal parts.
    If the adhesion promoter and the adhesive layer are activated simultaneously, the bonding of the adhesion promoter to the adhesive layer can be improved. By activating the adhesive layer, the increased wettability of its surface can in fact be used to physically bond the adhesion promoter to the adhesive layer.
    Process optimized, the bonding agent and / or the adhesive layer can be activated before the separation of the sheet metal part from the sheet metal strip. In addition, the process step of the activation can be shifted into a procedural rather uncritical time range, which can facilitate the handling of the method. In particular, if several parts are separated from the sheet metal strip several times in order to make the iPrinted: 12-12-2012 IE014 110 2012/50576 -4-
    Form dimensions of the sheet metal part to be separated, the activation can be made handling friendly between these separation steps.
    If the sheet-metal parts are separated by a sheet-metal strip with an adhesive layer provided on both sides of the sheet-metal strip, the handling of the method with regard to the introduction of a bonding layer between two adhesive layers can be considerably facilitated. A reduction of manufacturing costs can be achieved in this way.
    A joining of the sheet metal parts can be made possible if the sheet metal parts stacked one above the other under the separation device in the form of columns connect under the pressure of the separating device in a material-locking manner.
    To ensure a stable cohesive joining of the sheet metal parts, the separating device can form a brake for the separated sheet metal parts. For this purpose, the sheet metal parts are stacked in a line one above the other, which exerts a resistance to the further migration of the sheet metal parts in the line.
    A coupling agent made of polyvinyl alcohol may prove to be particularly advantageous in order to produce a relatively thin adhesion promoter layer on the adhesive layer. In addition, a particularly high chemical / physical reactivity of the adhesion promoter made of polyvinyl alcohol with baked enamel could be determined, which can enable mechanically extremely resilient laminated cores.
    If fillers are added to the mixture, among other things, the amount of adhesive agent required can be reduced. Furthermore, it is possible to achieve an improved connection of the adhesive layers and thus a mechanically stronger laminated core. Also with regard to the process step of the activation fillers can be used selectively. In addition, kaolin can be characterized as a filler in a primer layer consisting of between baked enamel -10- 12-12-2012 10 2012/50576
    Adhesive layers is provided. Other fillers are conceivable and therefore not excluded.
    In that the mixture is added to a particular water-soluble reaction accelerator, the chemical reaction between the polymeric adhesive layers and the adhesion promoter can be significantly improved. In particular, the use of 2-methylimidazoles as a reaction accelerator could be distinguished in baked enamel adhesive layers. If the mixture is accompanied by a water-soluble crosslinking agent, in particular based on melamine, the crosslinking of the polymers can be considerably increased. In particular partially etherified melamine resin could be characterized by the use of adhesive layers of baked enamel.
    The invention has also set itself the task of creating a laminated core that can be produced energy-saving despite high mechanical strength.
    The invention achieves the stated object with regard to the laminated core in that an adhesion promoter, in particular polyvinyl alcohol, is provided between two adhesive layers.
    If an adhesion promoter, in particular polyvinyl alcohol, is provided between two adhesive layers, in contrast to the prior art, a separate curing step in the continuous production process of the metal laminate can be dispensed with. Namely, the primer layer can provide sufficient mechanical strength of the sheet metal pact. In addition, the mechanical strength, which can be achieved by providing the adhesive layer, the time of complete curing of the laminated core from the manufacturing process in the technical use of the laminated core can be moved. An inexpensive manufactured sheet metal package can be created.
    Constructive simplicity on the laminated core can be made possible, if ever an adhesive layer is provided on a sheet metal part. -6-
    In addition, the invention may be compared to the prior art particularly stand out when a water-soluble thermoplastic coupling agent, in particular polyvinyl alcohol, for forming a cohesive connection between two curable polymeric adhesive layers, especially consisting of baked enamel, each applied to a sheet metal part, in the manufacture of a laminated core for electromagnetic components is used.
    In the figures, for example, the subject invention is illustrated using an exemplary embodiment. Show it
    1 is a schematic view of an apparatus for producing a laminated core,
    2 is a fragmentary enlarged view of FIG. 1 and FIG. 3 is a detail view of the material connection between two sheet metal parts of the laminated core according to FIG. 1.
    1, for example, a device 1 is shown, with which the inventive method for connecting sheet metal parts 2 to a laminated core 3 is performed. Thus, a sheet metal strip 5 is unwound from a coil 4, which on both hinge sides 6, 7 over the entire surface of a curable polymeric adhesive coating 8, 9 of baked enamel has. From this metal strip 5 10 sheet metal parts 2 are punched by means of a separator. Characterized in that on both hinge sides 6, 7 each one adhesive coating 8, 9 is present, the punched sheet metal parts 2, without having to contact them, with each other facing adhesive-coated pages are provided one above the other. Under the pressure of the upper tool 11, the sheet metal parts 2 are joined materially to a laminated core 3, wherein a line 13 is provided for guiding the sheet metal parts 2 in the lower tool 12. The laminated cores 3, which leave the line 13, are mechanically sufficiently firmly connected, because in contrast to the prior art is on the adhesive layer 8, of the facing each other in the cohesive joining of the sheet metal parts 2 adhesive layers 8, 9, a mixture 14 containing water and a thermo-plastic adhesion promoter 15, provided, as can be seen in particular from FIG. As adhesion promoter 15 polyvinyl alcohol is used.
    For applications of the adhesion promoter 15, the device 1 has a spraying device 17, which applies the mixture 14 to the adhesive coating 8 of the metal strip 5. Advantageously, the mixture of water and adhesion promoter 15 is used to form a nanosize thick adhesive layer. The water solubility of the adhesion promoter 15 additionally contributes to the reduction of the layer thickness of the adhesion promoter layer.
    Characterized in that the mixture is dried 14 with a subsequent to the spray 17 drying device 18, even in the continuous process of the device 1 ensures a constant layer thickness, which reproducibly mechanically fixed laminated cores 3 ensures. For a rapid procedure, the mixture 14 is applied to the sheet-metal strip 5 before separating the sheet-metal parts 2. The procedure can be further accelerated by the bonding agent 15 and the adhesive layers 8, 9 are activated before the separation of the sheet metal part 2 from the sheet metal strip 5. This step is located, as shown in Fig. 1, between two Abtrennschritten on the metal strip 5. From the separating device 10 namely parts 19 are separated from the sheet metal strip 5 in advance, so as to prepare the sheet metal strip 5 for a Endabtrennen the sheet metal parts 2.
    The comparatively reactive bonding agent 15 is activated immediately prior to the cohesive joining of the sheet metal parts 2 by a heater 20, the sheet metal strip 5 is heated to 100 degrees Celsius. In front of the heating device 20, an activation device 21 is provided, which serves to activate the adhesive coating 8, 9 - for example, by these layers 8, 9 are charged with hot water vapor. It is also conceivable that the adhesive coatings 8, 9 and the adhesion promoter 15 are activated simultaneously by the heater 20. iPrinted: 12-12-2012 ΪΕ0Ί4 -8- 102012/50576
    Simple construction conditions arise by stacking the sheet metal parts 2 in the line 13 of the lower tool 12 in column form, namely directly under the upper tool 11 of the separator 10. The particular a non-stick coating (eg: polytetrafluoroethylene) having upper tool 11 exerts a pressure by its punching movement 22 on the columnar in the line 13 stacked sheet metal parts 2. Since the line 13 on the further migration of the sheet metal parts 2 in the line 13 a resistance in the manner of a packet brake 16 exerts a joining of the sheet metal parts 2 is ensured under pressure. A stable cohesive connection is thus created.
    This compound is also formed by fillers 23, namely kaolin, in the mixture 14 from mechanically resilient, which fillers 23 are arranged in the adhesion promoter 15, as shown in FIG. 3 can be removed. This mechanical resilience of the cohesive connection between the sheet metal parts 2 is further increased by the mixture also a water-soluble reaction accelerator, namely 2-methylimidazoles, and a water-soluble crosslinker, namely partially etherified melamine resin, is attached. A sturdy laminated core 3 is created.
    In general, it is mentioned that a physical connection becomes possible by activating the baking enamel and / or the adhesion promoter. In this case, the substance in question is sticky, so that a cohesive connection can be established. A chemically curing bond does not necessarily have to occur. Advantageously, baking enamel and adhesion promoter are simultaneously subjected to the activation of a temperature which can activate both substances. A temperature of 70 to 100 ° C with a bandwidth of + -10% is conceivable.
    权利要求:
    Claims (15)
    [1]
    1. A method for connecting sheet metal parts (2) to a laminated core (3), wherein the sheet metal parts (2) of a sheet metal strip (5) with an at least partially , in particular on both hinge sides (6, 7) of the sheet-metal strip (5) provided aus-curable polymeric adhesive layer (8, 9), in particular baked enamel, separated, in particular punched out, the sheet metal parts (2) with each other facing adhesive coated sides provided one above the other and to a sheet-metal package (3) under pressure are materially connected, characterized in that at least one of the each other in the cohesive bonding of the sheet metal parts (2) facing adhesive layers (8, 9), a mixture (14) comprising water and a thermoplastic, in particular water-soluble , Bonding agent (15), is provided.
    [2]
    2. The method according to claim 1, characterized in that the mixture (14) prior to the cohesive bonding of the sheet metal parts (2) is dried.
    [3]
    3. The method according to claim 2, characterized in that the mixture (14) before a separation of the sheet metal parts (2) on the sheet metal strip (5) is applied.
    [4]
    4. The method according to any one of claims 1 to 3, characterized in that the bonding agent (15) is activated immediately before the cohesive bonding of the sheet metal parts (2).
    [5]
    5. The method according to any one of claims 1 to 4, characterized in that the bonding agent (15) and the adhesive layer (8, 9) are activated simultaneously.
    [6]
    6. The method according to claim 4 or 5, characterized in that several parts (2, 19) are separated from the sheet metal strip (5), wherein the bonding agent (14) 12-12-2012 IE015 -2-10 2012/50576 and / or the adhesive layer (8, 9) before the separation of the sheet metal part (2) from the sheet metal strip (5) are activated.
    [7]
    7. The method according to any one of claims 1 to 6, characterized in that sheet metal parts (2) of a sheet metal strip (5) with a on both hinge sides (6, 7) of the metal strip (5) over the entire surface provided adhesive layer (8, 9) are separated ,
    [8]
    8. The method according to any one of claims 1 to 7, characterized in that under the separating device (10) stacked in columnar form sheet metal parts (2) under the pressure of the separating device (10) cohesively with each other.
    [9]
    9. The method according to claim 8, characterized in that the sheet metal parts are stacked in a line (13) one above the other, which exerts a resistance to the further migration of the sheet metal parts (2) in the conduit (13).
    [10]
    10. The method according to any one of claims 1 to 9, characterized in that the adhesion promoter (15) consists of polyvinyl alcohol.
    [11]
    11. The method according to any one of claims 1 to 10, characterized in that the mixture (14) fillers (23), such as kaolin, are added.
    [12]
    12. The method according to any one of claims 1 to 11, characterized in that the mixture is a particular water-soluble reaction accelerator, such as 2-methylimidazoles, and / or a water-soluble crosslinking agent, in particular based on melamine, such as partially etherified melamine resin, attached.
    [13]
    13. laminated core with cohesively connected sheet metal parts (2), with at least two between two sheet metal parts (2) provided curable polymeric adhesive layers (8, 9), in particular baked enamel, characterized in that -3- between two adhesive layers (8, 9) a Adhesion promoter (15), in particular polyvinyl alcohol, is provided.
    [14]
    14. laminated core according to claim 13, characterized in that each one adhesive layer (8,9) on a sheet metal part (2) is provided.
    [15]
    15. Use of a water-soluble thermoplastic adhesion promoter (15), in particular polyvinyl alcohol, for forming a cohesive connection between two curable polymeric adhesive layers (8, 9), in particular consisting of baked enamel, each applied to a sheet metal part (2), in the production of a laminated core ( 3) for electromagnetic components.
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50576/2012A|AT512931B1|2012-12-11|2012-12-11|Laminated core and method for joining sheet metal parts to a laminated core|ATA50576/2012A| AT512931B1|2012-12-11|2012-12-11|Laminated core and method for joining sheet metal parts to a laminated core|
    JP2015545595A| JP6548081B2|2012-12-11|2013-12-11|Stratified iron core and method of bonding from sheet metal member to stratified iron core|
    MX2015007405A| MX370378B|2012-12-11|2013-12-11|Laminated core and method for connecting sheet metal parts to form a laminated core.|
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    US14/651,462| US10391741B2|2012-12-11|2013-12-11|Laminated core and method for connecting sheet metal parts to form a laminated core|
    EP13820723.8A| EP2931520A1|2012-12-11|2013-12-11|Laminated core and method for connecting sheet metal parts to form a laminated core|
    KR1020157016593A| KR102211301B1|2012-12-11|2013-12-11|Laminated core and method for connecting sheet metal parts to form a laminated core|
    PCT/AT2013/050246| WO2014089593A1|2012-12-11|2013-12-11|Laminated core and method for connecting sheet metal parts to form a laminated core|
    CN201380064923.7A| CN104884244A|2012-12-11|2013-12-11|Laminated core and method for connecting sheet metal parts to form a laminated core|
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