Abstract
A method for producing a shaped part may include providing a first layer consisting of a first sheet metal material and at least a second layer consisting of a second sheet metal material, forming a preliminary composite comprising the first layer and the at least second layer, plating the preliminary composite, and forming the preliminary composite to obtain the shaped part using a flow turning, compression or deep drawing method. The plating may be done before or during the forming process. At least one of the first layer or the second layer may be heated for the plating and/or the forming. The shaped part may be formed by compressing the preliminary composite with a pressing body, and the pressing body may be moved parallel or perpendicular to an axis of symmetry during the compression.
Claims
1.-12. (canceled)
13. A method for producing a shaped part, the method comprising: providing a first layer comprising a first sheet metal material and a second layer comprising a second sheet metal material; forming a preliminary composite that includes the first layer and the second layer; plating the preliminary composite; and forming the preliminary composite to obtain the shaped part by way of flow turning, compression, or deep drawing, wherein plating the preliminary composite is performed before or during the forming of the preliminary composite to obtain the shaped part.
14. The method of claim 13 comprising heating at least one of the first layer or the second layer for the plating.
15. The method of claim 13 wherein the preliminary composite is formed such that the shaped part is rotationally symmetrical to an axis of symmetry at least in some regions.
16. The method of claim 15 wherein the shaped part is formed by compressing the preliminary composite with a pressing body, wherein the pressing body is moved parallel or perpendicular to the axis of symmetry during the compression.
17. The method of claim 13 wherein the first sheet metal material is different than the second sheet metal material.
18. The method of claim 17 wherein the first sheet metal material and the second sheet metal material are comprised of an iron material.
19. The method of claim 17 wherein the first sheet metal material and the second sheet metal material are comprised of a nonferrous material.
20. The method of claim 13 comprising securing the first layer and the second layer for the plating.
21. The method of claim 13 comprising positioning the preliminary composite in a die.
22. The method of claim 21 comprising clamping the preliminary composite in the die by way of a spring element.
23. The method of claim 13 comprising positioning the preliminary composite in an at least partially-contoured receiving region of a die for the plating.
24. The method of claim 13 comprising positioning the preliminary composite on a shape-determining tool body for the plating and the forming.
25. The method of claim 24 wherein the shape-determining tool body is a round blank.
26. A shaped part fabricated by a method comprising: providing a first layer comprising a first sheet metal material and a second layer comprising a second sheet metal material, wherein the first sheet metal material comprises an iron material with a carbon fraction of more than 0.1% by weight; forming a preliminary composite that includes the first layer and the second layer; plating the preliminary composite; and forming the preliminary composite to obtain the shaped part by way of flow turning, compression, or deep drawing, wherein plating the preliminary composite is performed before or during the forming of the preliminary composite to obtain the shaped part.
27. The shaped part of claim 26 wherein the carbon fraction in the iron material of the first sheet metal material is more than 0.25% by weight.
28. The shaped part of claim 26 wherein the carbon fraction in the iron material of the first sheet metal material is more than 0.5% by weight.
29. The shaped part of claim 26 configured as a joint head.
Description
BRIEF DESCRIPTION OF THE FIGURES
[0030] FIG. 1 shows a die suitable for a method for producing a shaped part according to a first sample embodiment of the present invention.
[0031] FIGS. 2a to d show schematically consecutive snapshots of the method for producing a shaped part according to a second sample embodiment of the present invention.
[0032] FIGS. 3a to e show schematically consecutive snapshots of a method for producing a shaped part according to a third sample embodiment of the present invention.
EMBODIMENTS OF THE INVENTION
[0033] In the different figures the same parts are always given the same reference numbers and therefore in general are also only designated or mentioned once in each case.
[0034] FIG. 1 shows a die 10 suitable for a method for producing a shaped part according to a first sample embodiment of the present invention. In particular, this involves a method in which a first layer 1 of a first sheet metal material is plated with a second layer 2 of a second sheet metal material, i.e., by mechanical action an integrally bonded covering of the first layer 1 with the second layer 2 is created. Preferably, the second sheet metal material is one which is more precious or valuable than the first sheet metal material, or a shaped part is to be realized having different physical properties on different levels. In order to produce the shaped part consisting of the first layer 1 and the second layer 2, it is provided that the plating, especially an integrally bonded assembling of the first and second layer 1 and 2 into a composite, accompanying the plating, occurs at first in a first work step. Not represented here, but familiar to the skilled person, there then occurs the forming of the composite, which occurs in a second, separate work step, the forming involving a compression or deep drawing method by which the form of the shaped part is realized. In this way, one may advantageously do without a costly hot rolling of slabs stacked on each other in order to initially produce a semi-finished product in advance. For the fixing of the first layer 1 and the second layer 2 of sheet metal materials during the plating, the die 10 is preferably provided, where the die 10 has a receiving region to receive a preliminary composite consisting of the first layer 1 and the second layer 2. In particular, the die 10 comprises several spring elements 12, with which the first layer 1 and the second layer 2 are clamped in the die 10. In the sample embodiment represented in FIG. 1, spring elements 12 are arranged on an inner side 11 of the receiving region 11 around the periphery, especially at equal distances from each other. For example, the spring elements 12 each comprise two coil springs 13, which are attached to the inner side 11 of the receiving region 11. The end of the spring element 12 facing the first or the second layer 1 or 2 is preferably adapted to a radius of curvature which is dictated by the disk-shaped first and second layers 1 and 2. Furthermore, it is provided that a bottom region 11 of the receiving region 11 has contours in order to improve an intermeshing of the layers being plated, which may also comprise more than two layers of sheet metal materials. Using suitable means not represented here, one or both layers may be heated prior to the plating if needed.
[0035] FIGS. 2a to d show schematically consecutive snapshots of the method for producing a shaped part according to a second sample embodiment of the present invention. For example, a die 10 is used for this, as illustrated in FIG. 1. For the plating, it is provided that the disk-shaped first layer 1 and the second layer 2 are arranged one on top of the other inside the receiving region 11 of the die 10. The first and the second layer 1 and 2 have the same diameter here. In particular, the first and the second layer 1 and 2 are placed congruently on top of each other. It is conceivable that the upper second layer 2 terminates flush with an upper edge of the receiving region 11. After the first and second layer 1 and 2 are placed in the receiving region 11, wherein one or both layers may be heated if necessary by suitable means not represented here, the simultaneous forming and plating begins in that two discus-shaped pressing bodies 20 press against the upper, here the second, layer 2, and are moved along a direction running substantially parallel to a principal plane of extension of the layers or a direction running parallel to the bottom region 1 of the receiving region 11. In particular, this movement is repeated for as long as it takes to produce the desired shape of the shaped part being fabricated. In the present case, the fabricated shaped part comprises a hub.
[0036] FIGS. 3a to e show schematically consecutive snapshots of a method for producing a shaped part according to a third sample embodiment of the present invention. It is provided here that the first layer 1 and the second layer 2 are placed one on top of the other on a round blank 31, especially on an end piece of a round blank 31. Preferably, the round blank 31 tapers in the direction of the end piece on which the first layer 1 and the second layer 2 are lying. In particular, it is provided that the diameter of the first layer 1 or the second layer 2 is larger than a maximum diameter of the round blank 31. In this way, the first and second layer 1 and 2 placed on the round blank 31 stick out with respect to a side surface of the round blank 31. For the fixation, a hold-down 32 is provided, the hold-down 32 in a fixation position acting on the second layer 2 and thus holding together the first layer 1 and the second layer 2. By means of the hold-down 32, the first and the second layer 1 and 2 are preferably fixed in common. By suitable means not represented here, one or both layers may be heated if needed. Furthermore, it is provided that a flow turning process is performed by means of two, in particular discus-shaped, pressing bodies 20, by which a plating on the one hand and the forming on the other hand is achieved. In this case, the pressing bodies 20 are moved along a path substantially parallel to an axis of the round blank or along a path dictated by an outer side of the round blank, with the round blank being entirely rotationally symmetrical to the axis. Thanks to the flow turning, in particular, the first and the second layer 1 and 2 after the forming lie jointly against an outer side of the round blank 32 and thus the fabricated shaped part shown in FIG. 3e is provided.
LIST OF REFERENCE NUMBERS
[0037] 1 First layer
[0038] 2 Second layer
[0039] 10 Die
[0040] 11 Receiving region
[0041] 11 Bottom region
[0042] 11 Inner side
[0043] 12 Spring elements
[0044] 13 Coil spring
[0045] 20 Pressing body
[0046] 31 Round blank
[0047] 32 Hold-down
