MXPA00002233A - Member comprising several layers of a flat material and method for making the same - Google Patents

Abstract

The present invention relates to a method for making a stamped or finely cut member while minimising the amount of refuse during the manufacturing process. Accordingly, the member comprises several layers (3) of a flat material, wherein said layers (3) of flat material are divided into a plurality of segments (9.1, etc.) by partition lines (5). The partition lines (5) on the layers (3) of flat material are further offset relative to each other.

Description

CAME OR WHEEL TOOTHED THAT CONSISTS OF VARIOUS LAYERS OF MATERIAL PLANO AND PROCEDURE FOR ITS MANUFACTURE The invention relates to a cam or sprocket consisting of several layers of flat material stamped or finely cut and placed in the form of a sandwich between them, in accordance with the main concept of the patent claim 1 or 14. The invention further relates to a corresponding process for its manufacture in accordance with patent claim 9 or 24. A connecting rod of internal combustion engine manufactured from several layers of flat material stamped or finely cut and placed in sandwich form between them is presented for example in DE 384 1205 C2. An external gear consisting of one or more layers of flat material in the form of sheets, one on the other, is presented in DE 3026685 A1, where each layer of individual flat material has several openings, of which some are provided to receive bolts, in order to ensure a union of the individual layers between them. DE 4423107 A1 discloses cams consisting of one or more layers of flat material joined together. The mentioned sprockets or cams have in common the fact that the individual flat material layers are prepared by stamping or fine cutting. The drawback is the relatively large amount of waste, and this drawback grows with the thickness of the material used to form the flat layers. The object of the present invention is to provide a cam of this type or a gear wheel of this type in which a reduction in the use of raw material of the cams or sprockets compared with that required in the usual processes can be allowed. In addition, a method for manufacturing said cams or sprockets is provided. The solution of the object of the present invention is in a cam with the characteristics of patent claim 1, in the case of a gear with the characteristics of patent claim 14 and in the case of the corresponding procedure with the characteristics of Patent Claim 9 or 24. Preferred embodiments of the present invention are provided in the corresponding dependent claims. According to the present invention, it is stated that, individually, as a whole, the layers of flat material forming the cam or the gear are several parts with dividing lines along the plane of the layer of material, what at least some of these dividing lines in layers of neighboring flat material are displaced in relation to each other. Preferably, each layer of individual flat material is divided into at least two segments, which allows an arrangement that saves material from a metal strip from which a stamping machine cuts the individual segments. In order to further ensure the resistance of the toothed wheel or cam constituted by the segmentation of the layers of flat material into a large number of displaced individual pieces, the individual segments were finally applied on the layers of flat material, because what the lines of The division of a layer of flat material between the individual segments is displaced in relation to the dividing lines of other layers of preferably flat neighboring material. It is preferred that the sprocket has a circular or circular ring shape with a central hole, so it is again preferred that the dividing lines be radial from the inside to the outside. It is further preferred that the individual segments have a circular ring-shaped cross-section and that they carry on the outside and / or on the inside a gear, in such a way that a gear wheel is obtained. This can be either a gear wheel with teeth facing outward or with teeth pointing inwards, or a serrated ring that carries both teeth outwards and teeth inwards. A construction in accordance with the present invention offers important advantages at the time of the installation of pumps with toothed wheels inwards. While to date the external ring with inward teeth is made from a highly valuable metallic material which has a high loss of material corresponding to the empty part, this gear according to the present invention can now be processed by several layers of flat material, which in turn consist of segments. These layers can be stamped closely together and finally joined together. The same is true for an internal wheel equipped with teeth facing outwards. Each layer of flat material may preferably consist of two, especially three or four segments, whereby the dividing lines of neighboring flat material layers are approximately the same distance apart. For certain embodiments it may be advantageous if the individual flat material layers join together firmly in this state. In the case of outward toothed cogwheels, the necessary strength is thus provided. In other cases, for example in the case of an oil transport pump, a joining of adjacent flat material layers may not be necessary, since the individual segments stabilize themselves within the layers of the flat material in the integrated state. . It can be advantageous to join together the individual segments of layers of flat material for mounting purposes on pins, and then these pins are removed. In the case of a further preferred embodiment, the individual flat material layers can be assembled into a cam form, whereby all the layers of flat material in the placed state form the cams for the operation of the gasoline control valve of an internal combustion engine with piston. One can also contemplate the possibility that the individual segments of a layer of flat material are not identical as, for example, in the case of the sprockets described above. A manufacturing method according to the present invention is contemplated for a gear wheel of this type or for a cam of this type, wherein a series of segments is first stamped or finely cut and finally a toothed wheel is constructed or a cam by joining a certain number of segments to a layer of flat material and arranging several layers of flat material of this type between them to form an assembly, so that the dividing lines that are in each layer of material The planes of the segments are not arranged one above the other, but are displaced at least between layers of neighboring flat material. Depending on the number of segments per layer of flat material and depending on the object of the use of the gear or the cam, a layer of flat material can be constructed first by means of the corresponding placement of segments, and then by placing one over the other of several layers of flat material of this type may be the gear or the cam. It can be advantageous to first stack several segments of neighboring material layers and finally by placing additional segments to realize the individual flat material layer. For reasons of production as well as for technical reasons it may also be advantageous, during the stamping or fine cutting, to already prepare at least one receiving device for a linking means in each segment. In this way, during packaging, it is possible to join individual segments, for example, on the centering pin c or on a connecting means in the form of a bar. These rod-shaped joining means can also receive a bolt, which finally works to achieve the union of the flat material or can be shaped themselves in the form of a bolt, in such a way that the joining means is first used for packaging and finally for the long-term resistance of the gear or cam . Other advantages and features of the present invention are provided from the following claims and are shown in the drawing which represents one embodiment. Figure 1 is a perspective view of a toothed wheel with outward teeth made from several layers of flat material before being placed between them; Figure 2 is a perspective view of a cogwheel with teeth inwards; in assembled state, figure 3 is a cam according to the present invention, figure 4 is a perspective view of several segments in a strip of material, figure 5 schematically shows a side view of an installation for the preparation of layers of flat material and Figure 6 is a cross-sectional view of Figure 5. Figure 1 shows a mode in which the gear wheel is formed on a gear wheel 2 which bears teeth outwards 1. This gear wheel 2 as a whole consists of several layers of flat material 3, which are stamped from a strip of material 4. The layers of individual flat material 3 are made up of several parts, p or what division lines 5 lie in the direction of the layers of flat material 3 essentially in the plane of the layers of material. The individual flat material layers 3 have a central hole 6, from the edge of the hole 7 substantially radially extending dividing lines 5 outwards towards an outer circumferential line 8 of each of the layers of flat material 3. The cogwheel 2 according to FIG. 1 presents four segments 9.1, 9.2, 9.3 and 9.4 in each layer of flat material 3, which, in the assembled state, are limited by dividing lines 5. It can also be seen that the lines of division 5 presented by way of example in the layer of flat material 3 are displaced relative to the division lines 5 of the layer of neighboring flat material 3. During the stamping of the individual segments 9.1 ...., they can be prepared and receiving orifices 10, which constitute, when these individual segments 9.1 .... are assembled and when the individual flat material layers 3 are stacked, an orifice before to receive a connecting element 11, for example, a bolt. The embodiment according to FIG. 2 presents as gear wheel an internal wheel-type gear wheel in the assembled state. Each layer of flat material 3 is made from segments 9.1, 9.2 and 9.3 which extend over 120 °. The central hole 6 can be used, for example, to receive a gear wheel with teeth towards the outside 2 in accordance with Figure 1. The segments 9.1 .... in accordance with Figure 1 and according to Figure 2 show each circular ring-shaped cuts 12, which have teeth 15 on one of their cuts in the form of an arc of circle 13 or 14. In the case of a gear wheel 2 that bears teeth outwards in accordance with figure 1, the cuts inner circular arc shaped shapes 13 have a smooth surface, for example to receive a drive shaft, while, according to the figure, 2 the outer circular arc cuts 14 are smooth. If the sprocket according to Figure 2 is, for example, part of an internal sprocket pump for delivery, for example, of oil, then the individual segments 9.1 .... can present in their circular arc cuts. 14 protrusions 16 that are detached from the arch form or corresponding recesses, not shown, for fixing purposes. Obviously the gear wheel 2 according to figure 1, for the formation of a non-rotating union, a hole 6 that is not circular. The joining of the individual flat material layers therebetween can be carried out in any way possible in the art, and a possibility has already been presented through the connecting element 11. However, it is also possible, according to the intended use, to join the layers by glue, laser welding, or other forms of union. While on the gear wheels according to FIG. 1 and according to FIG. 2, the segments 9.1 ... are preferably identical parts, the segments 9.1, 9.2 of the cam according to FIG. 3 are preferably not identical Figure 3 shows a cam 20 in a top view, which in its entirety is made from several layers of stamped flat material 3. The layer of upper planar material 3 in the plane of the drawing presents the oblique dividing lines in relation to the profile of the cam, where the segments 9.1 and 9.2 are adjacent. By turning one of each third layer of flat material 3 after the stamping and before the placement of the individual layers, the dividing line 5 is located below the layer of flat material which is in the plane of the drawing in FIG. represented position. Figure 4 shows a very schematic form of an example of a strip of material 4 consisting of steel Ck 37, where the position of the segments 9.1 ... to be stamped is represented. It is possible to recognize the narrow and offset arrangement according to the need of the individual segments 9.1 ... to save the material of the strip of material 4 avoiding as far as possible the waste. If the sprockets according to Figure 1 and according to Figure 2 were stamped from a layer of flat material 3 in one piece, then the strip of material 4 should be at least as wide as the outer diameter of the wheels Toothed Figure 5 shows an installation for packaging with a base plate 25, with arranged recesses 26 where 27 connecting elements in the form of a bar 11 are placed as pins. In the middle, a centering pin 28 can be recognized which is located in the middle. the opening 6, while laterally optionally there is an adjustment element 29 which engages a gear 1.15. The pins 27 can, as shown in FIG. 5, left, receive a bolt 30, which penetrates the openings of individual segments 9.1, Alternatively, the pins 27 can serve themselves as connecting elements 11. At the time of printing it is preferred that the individual segments 9.1, .... have stamped several openings 10, in such a way that despite the lateral displacement of the division lines 5 between layers of neighboring flat material 3 in the complete cogwheel or in the cam, always one row of opening 10 is one above the other vertically, see figure 1. On the spike of centered 28 is a punch 31, whose individual punch heads 32 are arranged in relation to the pins 27 or the pins 30.

The invention further provides the advantage in the sense that changes in terms of the toothed wheel or the cam can be carried out comparatively easily. Changes in the gears or cam contours can be carried out more easily by exchanging stamping tools. This is possible by the appropriate choice of tool for the strip of material 4 and by fine cutting and final packaging of the gear or cam, without requiring further work.

Claims (27)

1. CLAIMS A cam for driving a gasoline control valve in a piston internal combustion engine consisting of several layers of flat material (3), placed one above the other, finely cut or stamped, characterized in that the layers of flat material (3) consist of several parts with division lines that are in the plane direction of the material layers (5) and at least some of these dividing lines (5) of neighboring flat material layers (3) are arranged in a displaced way between them.
2. A cam according to claim 1, characterized in that the dividing lines (5) are straight.
3. A cam according to claim 1 or 2, characterized in that the layers of flat material (3) have a central opening (6) in assembled state and the dividing lines (5) are essentially radial from the edge of the opening (7) to the outer circumference line (8) of the flat material layer (3) .
4. A cam according to one or more of the preceding claims, characterized in that the dividing line (5) of a layer of flat material (3) is arranged in such a way that it is at an approximately equal distance from the dividing line ( 5) of a layer of neighboring flat material (3) in both circumferential directions.
5. A cam according to one or more of the preceding claims 1 to 3, characterized in that the layers of flat material (3) have, in the assembled state, a central opening (6) and more than two, especially three or four dividing lines. (5) extend from this opening (6) radially outwards.
6. A cam according to claim 5, characterized in that the dividing lines (5) have the same spacing within the individual flat material layers (3) and the segments (9.1, 9.2, 9.3, 9.4) that make up the layers of flat material (3) that are between the dividing lines (5) are identical.
7. A cam according to one or more of the preceding claims, characterized in that each of the several segments (9.1, ....) that constitute a layer of flat material (3) is separately connected to a segment (9.1 ,. ...) of a layer of neighboring flat material (3).
8. A cam according to claim 7, characterized in that each segment (9.1, ....) has at least one hole (10) prepared by stamping or fine cutting to receive a joining element (11).
9. A process for the manufacture of a cam consisting of several layers of flat material (3) to control a gasoline valve in a piston internal combustion engine that consists of the following steps: a) stamping or fine cutting of several segments (9.1, ....) from a band of material (4), b) packed of a certain number of segments (9.1, ....) in such a way that bl) a layer of flat material is made ( 3) consisting of several segments (9.1, ....), with division lines (5) that are between the segments (9.1,), b2) the cam is formed from several layers of flat material (3 ) stacked, so that the individual flat material layers (3) are positioned between them in such a way that the dividing lines (5) are displaced between them at least in relation to layers of neighboring flat material (3). .
10. A process according to claim 9, characterized in that in step b) b) is carried out first and then b2). .
11. A process according to claim 9, characterized in that layers of neighboring flat material (3) are joined by means of a joining element (11) at least temporarily.
12. 12. A process according to claim 11, characterized in step a) in the individual segments (9.1, ....) is formed at least one hole for the connecting element (11) and in step b) packaging is carried out by segmenting the segments (9.1, ...) with its reception in connecting elements in the form of a bar (11).
13. 13. A process according to claim 12, characterized in that the connecting elements (11) remain in the cam in a durable manner.
14. 14. A gear wheel consisting of several layers of flat material (3) placed one on top of the other, stamped or finely cut, characterized in that the layers of flat material (3) are made up of several parts with dividing lines (5). ) in the direction of the plane of the layers of material and at least some of these dividing lines (5) of layers of neighboring flat material (3) are arranged in a displaced manner between them.
15. 15. A sprocket according to claim 14, characterized in that the dividing lines (5) are straight.
16. A sprocket according to claim 14 or according to claim 15, characterized in that the layers of flat material (3) in the assembled state have a central opening (6) and the dividing lines (5) extend essentially radially from the edge of the opening (7) to an outer circumferential line (8) of the layer of flat material (3).
17. 17. A sprocket according to one or more of claims 14 to 16, characterized in that the dividing line (5) of a layer of flat material (3) is arranged in such a way that it is in both circumferential directions at a approximately equal distance in relation to the dividing line (5) of a layer of neighboring flat material (3).
18. 18. A gear according to one or more of claims 14 to 16, characterized in that the layers of flat material (3) have, in the assembled state, a central opening (6) and more than two, especially three or four dividing lines (5) extend radially outward from this opening (6).
19. 19. A sprocket according to claim 18, characterized in that the dividing lines (5) are at an equal distance within the individual flat material layers (3) and the segments (9.1, 9.2, 9.3, 9.4) that they form the individual layers of flat material (3), which are between the dividing lines (5) are formed identically. .
20. A sprocket according to one or more of claims 14 to 19, characterized in that each of the several segments (9.1, ....) that constitute a layer of flat material (3) is separately connected to a segment ( 9.1, ....) of a layer of neighboring flat material (3). .
21. A sprocket according to claim 20, characterized in that each segment (9.1, ....) has at least by stamping or fine cutting a prepared opening (10) to receive a joining element (11). .
22. A sprocket according to claim 20, characterized by the segments (9.1, ....) forming circular ring sections (12) and between them these segments (9.1, ....) have dividing lines (5) that limit teeth (15). .
23. A sprocket according to claim 22, characterized in that the teeth (15) are arranged inwardly and the arc sections (14) to the outside are smoothly worked. .
24. A process for the manufacture of a gear wheel consisting of several layers of flat material (3) to control a gasoline valve of a piston internal combustion engine, which consists of the following steps: a) stamp or finely cut several segments (9.1, ....) from a strip of material (4), b) pack a certain number of segments (9.1, ....) of this type, so that bl) from several segments (9.1, ....) a layer of flat material (3) with division lines (5) between the segments (9.1, ....), b2) is obtained from several layers of flat material (3). ) stacked in relation to each other, the toothed wheel is formed, where the individual flat material layers (3) are positioned between them in such a way that the dividing lines (5) of at least some layers of neighboring flat material (3) are displaced among them.
25. 25. A process according to claim 24, characterized in that in step b) b) is carried out first and then b2).
26. 26. A process according to claim 24, characterized in that the adjacent flat material layers (3) are connected through a connecting element (11), at least temporarily.
27. 27. A process according to claim 26, characterized in that in step a) in each individual segment (9.1, ....) at least one receiving device is made for the connecting element (11) and in the step b) the packaging is carried out by joining the segments (9.1, ....) with their insertion in bar-shaped connection elements (11). . A process according to claim 27, characterized in that the connecting elements (11) remain permanently in the gear wheel.