NL1036318C2

NL1036318C2 - Method for forming defined contact zones on a surface of an element which is destined to be part of a push belt for a continuously variable transmission.

Info

Publication number: NL1036318C2
Application number: NL1036318A
Authority: NL
Inventors: Lucas Hendricus Robertus Maria Prinsen
Original assignee: Bosch Gmbh Robert
Priority date: 2008-12-16
Filing date: 2008-12-16
Publication date: 2010-06-17
Also published as: CN102245328A; WO2010071409A1; CN102245328B; JP2012512027A; JP5726748B2

Description

• ·

Title: Method for forming defined contact zones on a surface of an element which is destined to be part of a push belt for a continuously variable transmission

The present invention relates to a method for forming a transverse element which is destined to be part of a push belt for a continuously variable transmission, which transverse element comprises two main body surfaces and a circumferential surface 5 extending between the main body surfaces, which circumferential surface has two retaining surfaces located on opposite sides of the transverse element for delimiting a position of carriers of the push belt, in a radial direction of the push belt, and also two top surfaces which are connected to each other, and which, at an end, 10 are each connected to a retaining surface; wherein, during a blanking movement, the transverse element is blanked out of basic material by applying a cutting member, a supporting member and a mould having a receiving space for receiving the transverse element to be blanked, the supporting member and an 15 end of the cutting member; wherein, during a blanking movement, the transverse element to be blanked is clamped between the cutting member and the supporting member, wherein the cutting member, the transverse element to be blanked and the supporting member on the one hand, and the mould on 20 the other hand, are moved with respect to each other; and wherein the circumferential surface of the transverse element to be blanked is moved along a beveled circumferential edge of the mould while entering the receiving space of the mould.

25 A push belt for a continuously variable transmission is generally known. Usually, such a push belt comprises two endless, ribbon-like carriers shaped like a closed loop for carrying a relatively large number of transverse elements. The transverse elements are movably arranged along the entire circumference of the 30 carriers, wherein they are able to transmit forces which are related to a movement of the push belt.

1036318 i t 2

In the following description of the transverse element, the mentioned directions refer to the situation in which the transverse element is part of the push belt. A longitudinal direction of the transverse element corresponds to a circumferential direction of the 5 push belt. A vertical transverse direction of the transverse element corresponds to a radial direction of the push belt. A horizontal transverse direction of the transverse element corresponds to a direction perpendicular to both the longitudinal direction and the vertical transverse direction.

10 In the horizontal transverse direction, the transverse element is provided with recesses for receiving the carriers, on opposite sides. For the purpose of supporting the carriers, the transverse element comprises carrying surfaces. In the horizontal transverse direction, for the purpose of contact between the transverse element 15 and pulley sheaves of a pulley of a continuously variable transmission, the transverse element is provided with pulley sheave contact surfaces, on opposite sides, which are divergent in the direction of the carrying surfaces. The terms "top" and "bottom", which are hereinafter applied, are related to the direction of 20 divergence; this is defined as being from bottom to top.

In the vertical transverse direction, from bottom to top, the transverse element comprises successively a basic portion, a neck portion and a top portion, wherein, in the horizontal transverse direction, the dimensions of the neck portion are relatively small. 25 The basic portion comprises the carrying surfaces and the pulley sheave contact surfaces. In the push belt, the basic portion is located at the side of the inner circumference of the push belt, whereas the top portion is located at the side of the outer circumference of the push belt.

30 The transverse element has two main body surfaces which extend substantially parallel with respect to each other, substantially perpendicular to the longitudinal direction. At least a part of a first main body surface of the transverse element is destined to abut against at least a part of a second main body surface of an 35 adjacent transverse element in the push belt, whereas at least a part of the second main body surface of the transverse element is destined to abut against at least a part of the first main body surface of another adjacent transverse element in the push belt.

A circumferential surface, of which the carrying surfaces and 40 the pulley sheave contact surfaces are part, extends between the two 3 main body surfaces. Furthermore, the top portion comprises two retaining surfaces which are facing the carrying surfaces, and which are also part of the circumferential surface. When the transverse element is received in a push belt, the position of the carriers is 5 delimited in a radial direction by the carrying surfaces at one side, and by the retaining surfaces at another side. Other surfaces of the top portion which are part of the circumferential surface are two top surfaces which are connected to each other, and which, at an end, are each connected to a retaining surface.

10 On one of the main body surfaces of the transverse element, a projection is arranged, whereas in another of the main body surfaces of the transverse element, a recessed portion, which will hereinafter be referred to as depression, is arranged. The positions of the projection and the depression correspond to each other, 15 wherein the projection and the depression are usually positioned on the top portion. In the push belt, the projection of every transverse element is at least partially located in the depression of an adjacent transverse element, so that a mutual displacement of the transverse elements in a plane perpendicular to the 20 circumferential direction of the push belt is prevented.

The transverse element is manufactured out of basic material which is shaped like a sheet by means of a blanking process. In the blanking process, a cutting member and a supporting member are 25 applied, wherein the cutting member is destined to cut the transverse element out of the basic material under the influence of a cutting force, and wherein the supporting member is destined to support the transverse element by a supporting force during the blanking process. The circumference of both the supporting surface 30 and the cutting surface is substantially equal to the circumference of the transverse element. During the blanking process, the cutting member penetrates the basic material under the influence of pressure, wherein a mutual movement of transverse element to be blanked and the basic material is allowed. At that moment, the 35 transverse element to be blanked is clamped between the cutting member and the supporting member.

Furthermore, in the blanking process, a mould is applied, which is provided with a receiving space for receiving the transverse element to be blanked, the supporting member and an end of the 40 cutting member. The inner circumference of the receiving space 4 substantially corresponds to the circumference of the cutting member, the supporting member, as well as the transverse element to be blanked, so that the receiving space is capable of receiving the transverse element to be blanked, practically without any play.

5 The mould has a mould surface for supporting the basic material surrounding the transverse element to be blanked. The mould surface and the inner surface of the receiving space are connected to each other through a circumferential edge which is beveled. Hence, a bevel surface is located between the mould surface and the inner 10 surface of the receiving space, where otherwise a sharp edge would be present between the mould surface and the inner surface of the receiving space. A reason for having the bevel surface is related to requirements regarding the quality of surfaces which are part of the circumferential surface of the transverse element.

15 When the circumferential edge would be sharp, just a portion of the transverse element would be sheared loose from the basic material during the blanking process, while another portion of the transverse element would be torn loose from the basic material. It is clear that a portion that has been torn off has a relatively bad 20 surface quality. When a mould having a beveled circumferential edge is applied, the phenomenon of the transverse element tearing loose from the basic material is reduced to a minimum or even totally prevented, so that a good surface quality is guaranteed. In general, the quality of a surface is related to the roughness of the surface 25 in question, wherein it is true that the rougher the surface, the lower the surface quality. Maximum postponement of tearing off may be realized by choosing an appropriate design of the circumferential edge, i.e. by choosing appropriate dimensions and an appropriate angle of the bevel.

30

In particular, the present invention relates to a manufacturing process of a transverse element having elevated portions on at least one of the main body surfaces, such as known from WO 2004/036083 and WO 2008/077870. The reason for having the elevated portions is that 35 there is a need for having defined contact zones between adjacent transverse elements in a push belt. Both WO 2004/036083 and WO 2008/077870 show a transverse element having at an elevated portion at the top portion, centrally positioned around the projection, or two elevated portions at the top portion, positioned at different 5 sides of the top portion, and two elevated portions at the basic portion.

Having defined contact zones between the transverse elements in a push belt is very important in the field of continuously variable 5 transmission, and is essential to proper and reliable functioning of the push belt. Therefore, there is a great need for a method for manufacturing a transverse element which involves a most accurate formation of the defined contact zones on the main body surface of the transverse element. The present invention provides such a 10 method, wherein it is noted that this method is especially aimed at realizing at least one desired elevated portion on the top portion of the transverse element. In particular, according to the present invention, during the blanking process by means of which a transverse element is made, different portions of the top surfaces 15 of the transverse element to be blanked are moved along portions of the circumferential edge of the mould having different bevel extents.

The present invention is based on the insight that there is a well-defined relation between the extent to which the 20 circumferential edge of the mould which is used in the blanking process is beveled and a thickness, i.e. a dimension in the longitudinal direction, of the transverse element to be blanked. In general, it is true that a relatively small thickness of the transverse element is realized in case the bevel is relatively 25 small, and that a relatively large thickness of the transverse element is realized in case the bevel is relatively large. When at least one portion of the circumferential edge of the mould is beveled to a relatively small extent, and at least one other portion of the circumferential edge of the mould is beveled to a relatively 30 large extent, it is achieved that a transverse element having a relatively small thickness in one defined area and a relatively large thickness in another defined area is made, wherein the thicker area is suitable to be used as a contact zone of the transverse element.

35 When the method according to the present invention is applied, it is achieved that at least one defined contact zone is formed in the top portion of a transverse element, in an accurate manner. An advantage of the method according to the present invention is that there is no need for complex measures for realizing a desired shape 40 of the transverse element, as all that is needed is applying a mould 6 having a beveled circumferential edge, wherein the bevel extent is variable along the edge which is associated with the top surfaces of the transverse element, i.e. wherein the edge comprises different portions which are beveled to a different extent. The portions of 5 the top surfaces which are moved along the relatively small bevel surface(s) end up with a relatively poor surface quality, but that fact does not constitute a problem, as the surface quality of the top surfaces is not a critical factor in the functioning of the transverse element in a push belt.

10 It is noted that it is assumed that the extent to which the circumferential edge of the mould is beveled is related to the dimension of the bevel surface of the mould in a direction both parallel to the mould surface, i.e. in a direction substantially perpendicular to the direction of movement of the cutting member 15 during the blanking process or a direction substantially perpendicular to the direction of movement of the transverse element to be blanked during the blanking process, and perpendicular to a transition edge between the bevel surface and the mould surface. The circumferential edge has a relatively large bevel when the dimension 20 of the bevel surface is relatively large in said direction, whereas the circumferential edge has a relatively small bevel when the dimension of the bevel surface in said direction is relatively small. In the following, for sake of clarity, said direction will be referred to as bevel dimension direction.

25

The present invention furthermore relates to a mould, especially a mould which is suitable to be applied for carrying out the above-described method, i.e. the method according to which different portions of the top surfaces of a transverse element to be 30 blanked are moved along portions of the circumferential edge of the mould having different bevel extents. Hence, the mould according to the present invention may be defined as a mould having a receiving space for receiving the transverse element to be blanked, the supporting member and an end of the cutting member, as well as a 35 mould surface for supporting material surrounding the transverse element to be blanked, wherein the mould surface and an inner surface of the receiving space are connected to each other via a bevel surface; wherein different portions of the bevel surface which are located at the position of a total portion of the 40 circumferential edge which is destined to come in contact with the 7 top surfaces of the transverse element to be blanked during the blanking movement have different dimensions in a direction which is both parallel to the mould surface and perpendicular to a transition edge between the bevel surface and the mould surface, i.e. the bevel 5 dimension direction as mentioned earlier.

As has been explained in the foregoing, when a mould having a bevel surface which has portions of a different bevel extent at the location for contacting the top surfaces of a transverse element to be blanked is applied, it is possible to create areas of different 10 thickness in the top portion of the transverse element in an accurate manner, so that defined contact zones may be obtained on a main body surface of the transverse element.

In a preferred embodiment of the mould, the dimension of one of the portions of the bevel surface which are located at the position 15 of the total portion of the circumferential edge which is destined to come in contact with the top surfaces of the transverse element to be blanked during the blanking movement is relatively large and in an order of tenths of millimeters in the bevel dimension direction, and the dimension of another of the portions of the bevel 20 surface which are located at the position of the total portion of the circumferential edge which is destined to come in contact with the top surfaces of the transverse element to be blanked during the blanking movement is relatively small and in an order of hundredths of millimeters in the bevel dimension direction. For example, the 25 relatively large dimension may be between 0.15 mm and 0.25 mm, preferably between 0.2 mm and 0.25 mm, and the relatively small dimension may be between 0 mm and 0.1 mm, preferably between 0.05 mm and 0.1 mm. These examples of dimensions are related to common dimensions of transverse elements.

30 The total portion of the circumferential edge which is destined to come in contact with the top surfaces of the transverse element to be blanked during the blanking movement may be designed in any suitable way, with any suitable number of relatively large bevel portions and relatively small bevel portions. For example, the total 35 portion as mentioned may comprise three portions, wherein, in the bevel dimension direction, the dimension of a centrally located portion may be larger or smaller than said dimension of two portions which are located at opposite sides of the central portion, dependent on whether it is desired to have a central contact zone on 8 the top portion of the transverse element or to have two contact zones at different sides of the top portion.

It is also possible for the total portion of the circumferential edge which is destined to come in contact with the 5 top surfaces of the transverse element to be blanked during the blanking movement to comprise five portions. When it is desired to have two contact zones which are each located at opposite sides of the area where the projection is located, but which are not covering all of the rest of the area of the top portion, this may be realized 10 by having a central portion and end portions which are beveled to a smaller extent than two portions which are located between the central portion and an end portion at opposite sides of the central portion. In that case, in order to realize an advantageous and functional positioning of the contact zones on the transverse 15 element, it is preferred if, in a direction corresponding to the horizontal transverse direction of the transverse element to be blanked, the central portion of the total portion of the circumferential edge which is destined to come in contact with the top surfaces of the transverse element to be blanked during the 20 blanking movement has a dimension which is at least as large as a diameter of the corresponding projection and depression, and the portions which are located between the central portion and an end portion, at opposite sides of the central portion, overlap a transition which is present between a portion of the circumferential 25 edge which is destined to come in contact with the retaining surfaces of the transverse element to be blanked during the blanking movement and a portion of the circumferential edge which is destined to come in contact with the carrying surfaces of the transverse element to be blanked during the blanking movement, seen in a 30 direction corresponding to the vertical transverse direction of the transverse element to be blanked.

The present invention furthermore relates to a transverse element in which different portions of an entirety of the top 35 surfaces have different surface quality, wherein various possibilities regarding the number and the distribution of these different portions exist within the scope of the present invention. The present invention also relates to a push belt comprising transverse elements of this type.

9

The present invention will be explained on the basis of the following description of the invention with reference to the drawing, in which equal reference signs indicate equal or similar components, and in which: 5 figure 1 diagrammatically shows a side view of a continuously variable transmission having a push belt; figures 2 and 3 diagrammatically show different views of a transverse element for a push belt for a continuously variable transmission; 10 figure 4 diagrammatically shows a longitudinal section of a blanking area of a blanking device, as well as basic material positioned in the device; figure 5a diagrammatically shows a first stage of a blanking movement; figure 5b diagrammatically shows a second stage of a 15 blanking movement; figure 5c diagrammatically shows a third stage of a blanking movement; and figure 5d diagrammatically shows a fourth stage of a blanking movement; figure 6 diagrammatically shows a top view of a first embodiment of a mould which may be applied during the blanking movement, and also 20 a view of a main body surface of a transverse element which is made in a process in which the mould is applied; figure 7 diagrammatically shows a top view of a second embodiment of a mould which may be applied during the blanking movement, and also a view of a main body surface of a transverse element which is made 25 in a process in which the mould is applied; and figure 8 diagrammatically shows a top view of a third embodiment of a mould which may be applied during the blanking movement, and also a view of a main body surface of a transverse element which is made in a process in which the mould is applied.

30

Figure 1 diagrammatically shows a continuously variable transmission, such as for utilization in a motor vehicle. The continuously variable transmission is indicated in general by the reference sign 1.

35 The continuously variable transmission 1 comprises two pulleys 4, 5 being arranged on separate pulley shafts 2, 3. An endless push belt 6 being shaped like a closed loop is arranged around the pulleys 4, 5, and serves for transmitting torque between the pulley shafts 2, 3. Each of the pulleys 4, 5 comprises two pulley sheaves, 40 wherein the push belt 6 is positioned and clamped between said two 10 pulley sheaves, so that with the help of friction a force may be transmitted between the pulleys 4, 5 and the push belt 6.

The push belt 6 comprises at least one endless carrier 7, which is usually composed of a number of rings. Along the entire length of 5 the carrier 7, transverse elements 10 are arranged, wherein the transverse elements 10 are mutually adjacent to each other and are moveable with respect to the carrier 7 in the circumferential direction. For the sake of simplicity, only a number of these transverse elements 10 is shown in figure 1. Normally, both the 10 carrier 7 and the transverse elements 10 are manufactured from metal.

Figures 2 and 3 show a transverse element 10. A first main body surface of the transverse element 10 is indicated in general by the 15 reference sign 11, whereas a second main body surface of the transverse element 10 is indicated in general by the reference sign 12. A circumferential surface 19 extends between the main body surfaces 11, 12.

In the vertical transverse direction, the transverse element 10 20 comprises successively a basic portion 13, a relatively narrow neck portion 14, and a top portion 15 which is generally shaped like the tip of an arrow. In the push belt 6, the basic portion 13 is located at the side of the inner circumference of the push belt 6, whereas the top portion 15 is located at the side of the outer circumference 25 of the push belt 6. Furthermore, in a push belt 6, at least a portion of the first main body surface 11 of the transverse element 10 abuts against at least a portion of the second main body surface 12 of a subsequent transverse element 10, whereas at least a portion of the second main body surface 12 of the transverse element 10 30 abuts against at least a portion of the first main body surface 11 of a preceding transverse element 10. At the transition to the neck portion 14, the basic portion 13 of the transverse element as shown in figure 2 comprises two carrying surfaces 16 which serve for supporting two carriers 7. Furthermore, the basic portion 13 35 comprises two pulley sheave contact surfaces 17. When the transverse element 10 moves over the pulley 4, 5, contact between the transverse element 10 and contact surfaces of the pulley sheaves is realized through said pulley sheave contact surfaces 17. A bottom surface 18 extends between the pulley sheave contact surfaces 17.

40 The carrying surfaces 16, the pulley sheave contact surfaces 17, as 11 well as the bottom surface 18 are part of the circumferential surface 19.

On the first main body surface 11 of the transverse element 10, a projection 21 is arranged. In the shown example, the projection 21 5 is located on the top portion 15, and corresponds to a depression in the second main body surface 12. In figure 3, the depression is depicted by means of dotted lines and indicated by the reference sign 22. In the push belt 6, the projection 21 of the transverse element 10 is at least partially located in the depression 22 of a 10 subsequent transverse element 10. The projection 21 and the corresponding depression 22 serve to prevent mutual displacement of adjacent transverse elements 10 in a plane perpendicular to the circumferential direction of the push belt 6.

The top portion 15 comprises two retaining surfaces 23 which 15 are facing the carrying surfaces 16. When the transverse element 10 is arranged in a push belt 6, a position of the carriers 7 in the radial direction is delimited by the carrying surfaces 16 on one side, and by the retaining surfaces 23 on another side. Furthermore, the top portion 15 comprises two top surfaces 24 which are connected 20 to each other. At an end, each of the top surfaces 24 is connected to a retaining surface 23 of the top portion 15. Both the retaining surfaces 23 and the top surfaces 24 are part of the circumferential surface 19.

25 A blanking process known per se of the transverse element 10 will now be explained on the basis of figures 4 and 5a to 5d.

In figure 4, a blanking area of a blanking device 60 and basic material 50 positioned in the device are diagrammatically depicted. 30 The blanking device 60 comprises a cutting member 30 which is destined to cut the transverse element 10 out of the basic material 50. The cutting member 30 is inserted in a guiding space 36 in a guiding plate 35, an important function of which is guiding the cutting member 30 during a blanking movement. A supporting member 40 35 is in line with the cutting member 30, which is destined to support the transverse element 10 during the blanking process. The circumference of both the cutting member 30 and the supporting member 40 corresponds substantially to the circumference of the transverse element 10 to be blanked. The supporting member 40 is 40 inserted in a receiving space 46 in a mould 45, an important 12 function of which is guiding the cutting member 30, the supporting member 40, as well as the transverse element 10 during a blanking movement. The inner circumference of the receiving space 46 corresponds substantially to the circumference of the cutting member 5 30, the supporting member 40, as well as the transverse element 10.

Initially, the basic material 50 is located between the cutting member 30 and the guiding plate 35 on the one hand, and the supporting member 40 and the mould 45 on the other hand. A portion of the basic material 50 which is located between the cutting member 10 30 and the supporting member 40 is destined to form the transverse element 10, and will hereinafter be referred to as blanking portion 51. Another portion of the basic material 50, namely the portion that is located between the guiding plate 35 and the mould 45, will hereinafter be referred to as rest portion 52.

15 The mould 45 comprises a mould surface 47, an important function of which is supporting the rest portion 52 of the basic material 50. An inner surface of the receiving space 46 of the mould 45 is connected to the mould surface 47, through a circumferential edge 48. The circumferential edge 48 is beveled, i.e. a bevel 20 surface 49 is extending between the mould surface 47 and the inner surface of the receiving space 46. Without the bevel surface 49, the mould surface 47 and the inner surface of the receiving space 46 would be connected to each other over a sharp angle of substantially 90°. As has been remarked earlier, when a mould 45 having a sharp 25 circumferential edge 48 would be applied, a transverse element 10 of which the circumferential surface 19 has a low surface quality would be obtained.

In the following, a blanking movement is described on the basis 30 of figures 5a to 5d, in which different successive stages of the blanking movement are diagrammatically depicted.

In a first stage or initial stage, as diagrammatically shown in figure 5a, a blanking portion 51 of the basic material 50 is clamped between the cutting member 30 and the supporting member 40, while a 35 rest portion 52 is clamped between a guiding surface 37 of the guiding plate 35 and the mould surface 47 of the mould 45.

In a second stage, as diagrammatically shown in figure 5b, the entirety of cutting member 30, blanking portion 51 and supporting member 40 is moved with respect to the guiding plate 35, the rest 40 portion 52 and the mould 45, under the influence of pressure. In the 13 process, the direction of movement is substantially perpendicular to the guiding surface 37 and the mould surface 47. As a result of the mutual movement, the cutting member 30 penetrates the basic material 50, and the blanking portion 51 is pressed into the receiving space 5 46 of the mould 45.

In a third stage, as diagrammatically shown in figure 5c, the blanking portion 51 gets completely detached from the rest portion 52 as a result of the continuing mutual movement. Hereafter, the guiding plate 35 and the cutting member 30 are retracted with 10 respect to the mould 45 and the supporting member 40, wherein the contact between the rest portion 52 and the guiding surface 37 is maintained, and wherein the contact between the rest portion 52 and the mould surface 47 is lost.

In a fourth stage, as diagrammatically shown in figure 5d, as a 15 result of the mutual movement of the guiding plate 35 and the cutting member 30 on the one hand, and the mould 45 and the supporting member 40 on the other hand, the rest portion 45 has been put to a position at a distance from the mould surface 47. In this position, the rest portion 52 can be removed. Furthermore, the 20 supporting member 40 has been moved with respect to the mould 45 in such a way that the blanking portion 51 has been put to a position above the level of the mould surface 47, so that the blanking portion 51 can be removed as well. In the process, the supporting member 40 may function as pushing member.

25

The present invention is related to blanking transverse elements 10 which need to be provided with elevated portions on at least one of their main body surfaces 11, 12, in order to have defined contacting zones for contacting an adjacent transverse 30 element 10 when being positioned in a push belt 6. In figures 6, 7 and 8, some examples of such transverse elements 10 are diagrammatically shown. In these examples, the transverse elements 10 are provided with elevated portions 25a, 25b, 26, 26a, 26b on their first main body surface 11, i.e. at a side where the 35 projection 21 is present. Furthermore, in these examples, the transverse elements 10 comprise two elevated portions 25a, 25b which are located on the basic portion 13, wherein each portion 25a, 25b is positioned right underneath a carrying surface 16. Also, the transverse elements 10 comprise at least one elevated portion 26, 40 26a, 26b which is located on the top portion 15. The present 14 invention provides a method and a mould 45 for making the top elevated portion(s) 26, 26a, 26b as mentioned on the transverse elements 10.

In the example as shown in figure 6, the transverse element 10 5 comprises a single top elevated portion 26, which is arranged such as to partly surround the projection 21. The top elevated portion 26 is formed during the blanking process of the transverse element 10. To this end, a portion 61 of the circumferential edge 48 of the mould 45 which is used for forming the transverse element 10, namely 10 a portion 61 where the top surfaces 24 of the transverse element 10 pass during the blanking process, and which will hereinafter be referred to as top surface contacting portion 61, has a specific shape, as will be explained in the following.

Along the length of the top surface contacting portion 61, 15 different portions having different bevel extents may be discerned. For sake of completeness, it is noted that in figure 6, for sake of clarity, the dimensions of the various bevels as well as the differences between the dimensions of the various bevels are shown in an exaggerated fashion. Furthermore, it is noted that it is 20 assumed that the extent to which the circumferential edge 47 of the mould 45 is beveled is related to the dimension of the bevel surface 49 of the mould 45 in a direction both parallel to the mould surface 47 and perpendicular to a transition edge 65 between the bevel surface 49 and the mould surface 47.

25 In the example as shown in figure 6, there are three different portions of the top surface contacting portion 61, namely a central portion 62 having a relatively large bevel extent, and two side portions 63a, 63b having a relatively small bevel extent. In figure 6, a relation between the portions 62, 63a, 63b of the top surface 30 contacting portion 61 and the elevated portion 26 on the top portion 15 of the transverse element 10 is indicated by means of dotted lines. It can be seen that the position of the central portion 62 of the top surface contacting portion 61 corresponds to the position of the elevated portion 26, and that the positions of the side portions 35 63 of the top surface contacting portion 61 correspond to the positions of the portions of the top portion 15 which are present on opposite sides of the elevated portion 26.

In general, according to an insight underlying the present invention, a portion of the top surface contacting portion 61 where 40 a relatively large bevel is present is associated with a relatively 15 large thickness of the transverse element 10, and a portion of the top surface contacting portion 61 where a relatively small bevel is present is associated with a relatively small thickness of the transverse element 10. On the basis of this insight, it is possible 5 to make moulds 45 in such a way that the formation of one or more elevated portions 26, 26a, 26b during the blanking process of a transverse element 10 can be accurately controlled, wherein the elevated portion(s) 26, 26a, 26b may actually be realized at a desired position on the top portion 15 of the transverse element 10. 10 It is noted that the design of the top surface contacting portion 61 does not only influence the thickness distribution of the top portion 15 of the transverse element 10, as there is also a relation between the bevel extent and the surface quality of the top surfaces 24 of the transverse element 10. Accordingly, the surface 15 quality of the top surfaces 24 is better at a portion which is associated with a portion of the top surface contacting portion 61 having a relatively large bevel extent than at a portion which is associated with a portion of the top surface contacting portion 61 having a relatively small bevel extent. The additional effect of a 20 variation of surface quality of the top surfaces 24 does not influence the functioning of the transverse element 10 in a push belt, and does therefore not constitute a negative additional effect, so that the present invention may be applied without restriction or compromise.

25 Figures 7 and 8 show two other examples of the design of the top surface contacting portion 61 of the circumferential edge 48 of the mould 45. In these figures, like in figure 6, the dimensions of bevels of various portions of the top surface contacting portion 61 as well as the differences of the dimensions are shown in an 30 exaggerated fashion.

In figure 7, it is shown that the top surface contacting portion 61 may have a central portion 62 and side portions 63a, 63b as described in respect of figure 6, wherein the central portion 62 has a relatively small bevel extent, and the side portions 63a, 63b 35 have a relatively large bevel extent. As a consequence, the transverse element 10 which is blanked when the mould 45 is used has two elevated portions 26a, 26b on the top portion 15, wherein these portions 26a, 26b are located at opposite sides of the projection 21. Furthermore, a central portion of the top surfaces 24 of the 16 transverse element 10 has a smaller surface quality than the other portions of the top surfaces 24.

In figure 8, it is shown that the top surface contacting portion 61 may have five portions, wherein a central portion 62 and 5 two side portions 63a, 63b have a relatively small bevel extent, and wherein intermediate portions 64a, 64b have a relatively large bevel extent. As a consequence, the transverse element 10 which is associated with the mould 45 has two elevated portions 26a, 26b on its top portion 15, which are located in areas outside of the area 10 where the projection 21 is present, but which are not extending all the way to the sides of the top portion 15. In particular, a length of the central portion 62 of the top surface contacting portion 61 is larger than a diameter of the projection 21, and the intermediate portions 64a, 64b are positioned such as to be suitable for 15 realizing elevated portions 26a, 26b which, in the vertical transverse direction, are each covering a transition area 27 which is present between a carrying surface 16 and a retaining surface 23 positioned at the same side of the transverse element 10. With this positioning of the elevated portions 26a, 26b on the top portion 15, 20 an advantageous distribution of forces over the first main body surface 11 is obtained during application of the transverse element 10 in a push belt 6. As far as the surface quality of the top surfaces 24 of the transverse element 10 is concerned, it is noted that a central portion and side portions have a smaller surface 25 quality than intermediate portions.

It will be clear to a person skilled in the art that the scope of the present invention is not limited to the examples discussed above, but that several amendments and modification thereof are 30 possible without deviating from the scope of the invention as defined in the appended claims.

According to the present invention, the top surface contacting portion 61 of the circumferential edge 48 of the mould 45 which is used in the process of manufacturing transverse elements 10 35 comprises at least two different portions 62, 63a, 63b, 64a, 64b having different bevel extents. In a practical design of the circumferential edge 48, dimensions of the bevel of portions of the circumferential edge 48 which are destined to contact the retaining surfaces 23, the carrying surfaces 16 and the pulley sheave contact 40 surfaces 17 of a transverse element 10 during its blanking process, 17 and dimensions of the relatively large bevel of the top surface contacting portion 61 of the circumferential edge 48 are in the same order. Furthermore, in the same practical design of the circumferential edge 48, dimensions of the bevel of other portions 5 of the circumferential edge 48, including a portion which is destined to contact the bottom surface 18 of the transverse element 10, and dimensions of the relatively small bevel of the top surface contacting portion 61 of the circumferential edge 48 are in the same order. Besides the practical design as mentioned, other designs of 10 the circumferential edge 48 are feasible within the scope of the present invention, as long as at least two different bevels are present in the top surface contacting portion 61 thereof.

In the foregoing, a method for forming a transverse element 10 15 which is destined to be part of a push belt 6 for a continuously transmission 1 is described, which transverse element 10 has two main body surfaces 11, 12 and a circumferential surface 19. The transverse element 10 is blanked out of basic material 50 during a blanking movement, wherein, among other things, a mould 45 having a 20 receiving space 46 is applied. When, during the blanking movement, the transverse element 10 enters the receiving space 46, the circumferential surface 19 of the transverse element 10 moves along a beveled circumferential edge 48 of the mould 45.

A total portion 61 of the circumferential edge 48 of the mould 25 45 which is destined to contact top surfaces 24 of the transverse element 10 comprises at least two different portions 62, 63a, 63b, 64a, 64b having different bevel extents. On the basis of this fact, accurate formation of at least one elevated portion 26 on a top portion 15 of the transverse element 10 is realized.

1036318

Claims

1. Werkwijze voor het vormen van een dwarselement (10) dat bestemd is om deel uit te maken van een duwband (6) voor een continu variabele transmissie (1), welk dwarselement (10) twee hoofdlichaamsvlak-ken (11, 12) en een zich tussen de hoofdlichaamsvlakken (11, 12) 5 uitstrekkend omtreksvlak (19) heeft, welk omtreksvlak (19) twee aan weerszijden van het dwarselement (10) gelegen opsluitvlakken (23) voor het in radiale richting van de duwband (6) afbakenen van een positie van dragers (7) van de duwband (6) omvat, en tevens twee op elkaar aansluitende bovenvlakken (24), die elk bij een uiteinde aan-10 sluiten op een opsluitvlak (23), omvat; waarbij het dwarselement (10) tijdens een stansbeweging uit basismateriaal (50) wordt gestanst onder toepassing van een snijorgaan (30), een ondersteuningsorgaan (40) en een matrijs (45) met een op-neemruimte (46) voor het opnemen van het te stansen dwarselement 15 (10), het ondersteuningsorgaan (40) en een uiteinde van het snij orgaan (30); waarbij tijdens een stansbeweging het te stansen dwarselement (10) is ingeklemd tussen het snijorgaan (30) en het ondersteuningsorgaan (40), waarbij het snijorgaan (30), het te stansen dwarselement (10) 20 en het ondersteuningsorgaan (40) enerzijds en de matrijs (45) anderzijds ten opzichte van elkaar worden bewogen; en waarbij het omtreksvlak (19) van het te stansen dwarselement (10) bij het binnengaan van de opneemruimte (46) van de matrijs (45) langs een afgeschuinde omtreksrand (48) van de matrijs (45) wordt 25 bewogen, waarbij verschillende gedeeltes van de bovenvlakken (24) van het te stansen dwarselement (10) langs gedeeltes (62, 63a, 63b, 64a, 64b) van de omtreksrand (48) van de matrijs (45) met een verschillende mate van afschuining worden bewogen.Method for forming a transverse element (10) intended to form part of a push belt (6) for a continuously variable transmission (1), which transverse element (10) comprises two main body surfaces (11, 12) and has a peripheral surface (19) extending between the main body surfaces (11, 12), which peripheral surface (19) has two retaining surfaces (23) located on either side of the transverse element (10) for defining radially of the push belt (6) comprises a position of carriers (7) of the push belt (6), and also comprises two adjoining upper surfaces (24), each of which connects at one end to a retaining surface (23); the transverse element (10) being punched out of base material (50) during a blanking movement using a cutting member (30), a supporting member (40) and a mold (45) with a receiving space (46) for receiving the die cross element 15 (10), the support member (40) and one end of the cutting member (30); wherein during a punching movement the transverse element (10) to be punched is clamped between the cutting member (30) and the support member (40), the cutting member (30), the transverse element (10) to be punched and the support member (40) on the one hand and the mold (45) on the other hand is moved relative to each other; and wherein, when entering the receiving space (46) of the mold (45), the peripheral surface (19) of the transverse element to be punched is moved along a beveled peripheral edge (48) of the mold (45), with different portions of the upper surfaces (24) of the transverse element (10) to be punched along sections (62, 63a, 63b, 64a, 64b) of the peripheral edge (48) of the mold (45) with different degrees of bevel.

2. Matrijs (45), geschikt om te worden toegepast ten behoeve van een stansproces voor het vormen van een dwarselement (10) voor een duwband (6) voor een continu variabele transmissie (1), welk dwarselement (10) twee hoofdlichaamsvlakken (11, 12) en een zich tussen de hoofdlichaamsvlakken (11, 12) uitstrekkend omtreksvlak (19) 35 heeft, welk omtreksvlak (19) twee aan weerszijden van het dwarselement (10) gelegen opsluitvlakken (23) voor het in radiale richting van de duwband (6) afbakenen van een positie van dragers (7) 1036318 van de duwband (6) omvat, en tevens twee op elkaar aansluitende bovenvlakken (24), die elk bij een uiteinde aansluiten op een op-sluitvlak (23), omvat, en welk dwarselement (10) tijdens een stans-beweging uit basismateriaal (50) wordt gestanst onder verdere toe-5 passing van een snijorgaan (30) en een ondersteuningsorgaan (40), waarbij tijdens een stansbeweging het te stansen dwarselement (10) is ingeklemd tussen het snijorgaan (30) en het ondersteuningsorgaan (40), waarbij het snijorgaan (30), het te stansen dwarselement (10) en het ondersteuningsorgaan (40) enerzijds en de matrijs (45) ander-10 zijds ten opzichte van elkaar worden bewogen; welke matrijs (45) een opneemruimte (46) voor het opnemen van het te stansen dwarselement (10), het ondersteuningsorgaan (40) en een uiteinde van het snijorgaan (30) heeft, alsmede een matrijsvlak (47) voor het ondersteunen van materiaal (52) dat het te stansen dwars-15 element (10) omringt, waarbij het matrijsvlak (47) en een binnen-oppervlak van de opneemruimte (46) via een afschuiningsvlak (49) op elkaar aansluiten; waarbij verschillende gedeeltes (62, 63a, 63b, 64a, 64b) van het af-schuiningsvlak (49) die zich bevinden ter plaatse van een totaal ge-20 deelte (61) van de omtreksrand (48) dat is bestemd om tijdens de stansbeweging in contact te komen met de bovenvlakken (24) van het te stansen dwarselement (10), verschillende afmetingen hebben in een richting die zowel parallel met het matrijsvlak (47) als haaks op een overgangsrand (65) tussen het afschuiningsvlak (49) en het 25 matrijsvlak (47) is.A mold (45) suitable for use for a punching process for forming a transverse element (10) for a push belt (6) for a continuously variable transmission (1), which transverse element (10) comprises two main body surfaces (11 12) and a peripheral surface (19) extending between the main body surfaces (11, 12), said peripheral surface (19) having two retaining surfaces (23) located on either side of the transverse element (10) for the radial direction of the push belt ( 6) defining a position of carriers (7) 1036318 of the push belt (6), and also comprises two mutually connecting upper surfaces (24), each of which connects at one end to a retaining surface (23), and which transverse element (10) is punched out of base material (50) during a blanking movement with the further use of a cutting member (30) and a supporting member (40), wherein during a blanking movement the transverse element (10) to be punched is clamped between the cutting member (30) and the supporting member (40), wherein the cutting member (30), the transverse element (10) to be punched and the supporting member (40) on the one hand and the mold (45) on the other are moved relative to each other; which mold (45) has a receiving space (46) for receiving the transverse element (10) to be punched, the support member (40) and an end of the cutting member (30), and a mold surface (47) for supporting material (47) 52) that surrounds the transverse element (10) to be punched, wherein the mold surface (47) and an inner surface of the receiving space (46) connect to each other via a bevel surface (49); wherein different portions (62, 63a, 63b, 64a, 64b) of the chamfering surface (49) located at a total portion (61) of the peripheral edge (48) intended to be engaged during the punching movement come into contact with the upper surfaces (24) of the transverse element (10) to be punched, have different dimensions in a direction which is parallel to the mold surface (47) and at right angles to a transition edge (65) between the chamfering surface (49) and the 25 is die face (47).

3. Matrijs (45) volgens conclusie 2, waarbij de afmeting van één van de gedeeltes (62, 63a, 63b, 64a, 64b) van het afschuiningsvlak (49) die zich bevinden ter plaatse van het totale gedeelte (61) van 30 de omtreksrand (48) dat is bestemd om tijdens de stansbeweging in contact te komen met de bovenvlakken (24) van het te stansen dwarselement (10), relatief groot is en in een orde grootte van tienden van millimeters is in de richting die zowel parallel met het matrijsvlak (47) als haaks op een overgangsrand (65) tussen het af-35 schuiningsvlak (49) en het matrijsvlak (47) is, en waarbij de afmeting van een ander van de gedeeltes (62, 63a, 63b, 64a, 64b) van het afschuiningsvlak (49) die zich bevinden ter plaatse van het totale gedeelte (61) van de omtreksrand (48) dat is bestemd om tijdens de stansbeweging in contact te komen met de bovenvlakken (24) van het 40 te stansen dwarselement (10), relatief klein is en in een orde grootte van honderdsten van millimeters is in de richting die zowel parallel met het matrijsvlak (47) als haaks op een overgangsrand (65) tussen het afschuiningsvlak (49) en het matrijsvlak (47) is.The mold (45) of claim 2, wherein the dimension of one of the portions (62, 63a, 63b, 64a, 64b) of the chamfering surface (49) located at the total portion (61) of the circumferential edge (48) intended to come into contact with the upper surfaces (24) of the transverse element (10) to be punched during the blanking movement, is relatively large and is in an order of magnitude of tenths of millimeters in the direction both parallel to the die face (47) is perpendicular to a transition edge (65) between the chamfer face (49) and the die face (47), and wherein the dimension of another of the portions (62, 63a, 63b, 64a, 64b ) of the chamfering surface (49) located at the total part (61) of the peripheral edge (48) which is intended to come into contact with the upper surfaces (24) of the transverse element (10) to be punched during the punching movement ), is relatively small and in an order of hundredths of millimeters in the direction that z either parallel to the mold face (47) as being perpendicular to a transition edge (65) between the chamfer face (49) and the mold face (47).

4. Matrijs (45) volgens conclusie 2 of 3, waarbij de afmeting van één van de gedeeltes (62, 63a, 63b, 64a, 64b) van het afschuinings vlak (49) die zich bevinden ter plaatse van het totale gedeelte (61) van de omtreksrand (48) dat is bestemd om tijdens de stansbeweging in contact te komen met de bovenvlakken (24) van het te stansen 10 dwarselement (10), relatief groot is en tussen 0,15 mm en 0,25 mm, bij voorkeur tussen 0,2 mm en 0,25 mm is gelegen in de richting die zowel parallel met het matrijsvlak (47) als haaks op een overgangsrand (65) tussen het afschuiningsvlak (49) en het matrijsvlak (47) is, en waarbij de afmeting van een ander van de gedeeltes (62, 63a, 15 63b, 64a, 64b) van het afschuiningsvlak (49) die zich bevinden ter plaatse van het totale gedeelte (61) van de omtreksrand (48) dat is bestemd om tijdens de stansbeweging in contact te komen met de bovenvlakken (24) van het te stansen dwarselement (10), relatief klein is en tussen 0 mm en 0,1 mm, bij voorkeur tussen 0,05 mm en 20 0,1 mm is gelegen in de richting die zowel parallel met het matrijs vlak (47) als haaks op een overgangsrand (65) tussen het afschuiningsvlak (49) en het matrijsvlak (47) is.The mold (45) of claim 2 or 3, wherein the size of one of the portions (62, 63a, 63b, 64a, 64b) of the chamfering surface (49) located at the overall portion (61) of the peripheral edge (48) which is intended to come into contact with the upper surfaces (24) of the transverse element (10) to be punched during the blanking movement, is relatively large and between 0.15 mm and 0.25 mm, preferably is between 0.2 mm and 0.25 mm in the direction that is both parallel to the die face (47) and perpendicular to a transition edge (65) between the chamfer face (49) and the die face (47), and the dimension of another of the portions (62, 63a, 63b, 64a, 64b) of the chamfering surface (49) located at the total portion (61) of the peripheral edge (48) intended to be engaged during the blanking movement to come into contact with the upper surfaces (24) of the transverse element (10) to be punched, is relatively small and between 0 mm and 0.1 mm, preferably between 0, 05 mm and 0.1 mm is located in the direction that is both parallel to the die face (47) and perpendicular to a transition edge (65) between the chamfer face (49) and the die face (47).

5. Matrijs (45) volgens een willekeurige der conclusies 2-4, waar-25 bij het totale gedeelte (61) van de omtreksrand (48) dat is bestemd om tijdens de stansbeweging in contact te komen met de bovenvlakken (24) van het te stansen dwarselement (10), drie gedeeltes (62, 63a, 63b) omvat, waarbij de afmeting van een centraal gelegen gedeelte (62) in de richting die zowel parallel met het matrijsvlak (47) als 30 haaks op een overgangsrand (65) tussen het afschuiningsvlak (49) en het matrijsvlak (47) is, groter is dan deze afmeting van twee aan weerszijden van het centrale gedeelte (62) gelegen gedeeltes (63a, 63b) .5. Mold (45) according to any of claims 2-4, wherein the entire part (61) of the peripheral edge (48) which is intended to come into contact with the upper surfaces (24) of the transverse element (10) to be punched, comprises three sections (62, 63a, 63b), the dimension of a centrally located section (62) in the direction both parallel to the die face (47) and perpendicular to a transition edge (65) between the chamfer face (49) and the die face (47), is larger than this dimension of two sections (63a, 63b) located on either side of the central portion (62).

6. Matrijs (45) volgens een willekeurige der conclusies 2-4, waar bij het totale gedeelte (61) van de omtreksrand (48) dat is bestemd om tijdens de stansbeweging in contact te komen met de bovenvlakken (24) van het te stansen dwarselement (10), drie gedeeltes (62, 63a, 63b) omvat, waarbij de afmeting van een centraal gelegen gedeelte 40 (62) in de richting die zowel parallel met het matrijsvlak (47) als haaks op een overgangsrand (65) tussen het afschuiningsvlak (49) en het matrijsvlak (47) is, kleiner is dan deze afmeting van twee aan weerszijden van het centrale gedeelte (62) gelegen gedeeltes (63a, 63b) . 5A mold (45) according to any of claims 2-4, wherein at the total portion (61) of the peripheral edge (48) which is intended to come into contact with the upper surfaces (24) of the die to be punched during the blanking movement transverse element (10), comprises three portions (62, 63a, 63b), the dimension of a centrally located portion 40 (62) being in the direction both parallel to the die face (47) and perpendicular to a transition edge (65) between the chamfering face (49) and the die face (47) is smaller than this dimension of two sections (63a, 63b) located on either side of the central portion (62). 5

7. Matrijs (45) volgens een willekeurige der conclusies 2-4, waarbij het totale gedeelte (61) van de omtreksrand (48) dat is bestemd om tijdens de stansbeweging in contact te komen met de bovenvlakken (24) van het te stansen dwarselement (10), vijf gedeeltes omvat, 10 waarbij de afmeting van een centraal gelegen gedeelte (61) en twee eindgedeeltes (63a, 63b) in de richting die zowel parallel met het matrijsvlak (47) als haaks op een overgangsrand (65) tussen het af-schuiningsvlak (49) en het matrijsvlak (47) is, kleiner is dan deze afmeting van twee gedeeltes (64a, 64b) die aan weerszijden van het 15 centrale gedeelte (62) tussen het centrale gedeelte (62) en een eindgedeelte (63a, 63b) in zijn gelegen.A mold (45) according to any of claims 2-4, wherein the entire part (61) of the peripheral edge (48) which is intended to come into contact with the upper surfaces (24) of the transverse element to be punched during the punching movement (10), comprises five sections, the dimension of a central section (61) and two end sections (63a, 63b) in the direction both parallel to the mold face (47) and perpendicular to a transition edge (65) between the bevel face (49) and the die face (47) is smaller than this dimension of two portions (64a, 64b) that are on either side of the central portion (62) between the central portion (62) and an end portion (63a , 63b).

8. Matrijs (45) volgens conclusie 7, geschikt om te worden toegepast ten behoeve van een stansproces voor het vormen van een 20 dwarselement (10) waarvan het omtreksvlak (19) verder twee aan weerszijden van het dwarselement (10) gelegen dragervlakken (16) voor het ondersteunen van dragers (7) van de duwband (6) omvat, en dat op een gedeelte dat gedeeltelijk door de opsluitvlakken (23) en de bovenvlakken (24) wordt afgebakend, een met elkaar corresponde-25 rende nop (21) en kuil (22) heeft, waarbij van het totale gedeelte (61) van de omtreksrand (48) dat is bestemd om tijdens de stansbeweging in contact te komen met de bovenvlakken (24) van het te stansen dwarselement (10), het centrale gedeelte (62) in een richting die correspondeert met een breedterichting van het te stansen dwars-30 element (10), een afmeting heeft die ten minste zo groot is als een diameter van de met elkaar corresponderende nop (21) en kuil (22), en de gedeeltes (64a, 64b) die aan weerszijden van het centrale gedeelte (62) tussen het centrale gedeelte (62) en een eindgedeelte (63a, 63b) in zijn gelegen, gezien in een richting die correspon-35 deert met een hoogterichting van het te stansen dwarselement (10), een overgang overlappen die aanwezig is tussen een gedeelte van de omtreksrand (48) dat bestemd is om tijdens de stansbeweging in contact te komen met de opsluitvlakken (23) van het te stansen dwarselement (10) en een gedeelte van de omtreksrand (48) dat bestemd is om tijdens de stansbeweging in contact te komen met de dragervlakken (16) van het te stansen dwarselement (10).8. Mold (45) according to claim 7, suitable for use for a punching process for forming a transverse element (10), the circumferential surface (19) of which are furthermore two carrier surfaces (16) located on either side of the transverse element (10). ) for supporting carriers (7) of the push belt (6), and which has a corresponding stud (21) on a part partially delimited by the retaining surfaces (23) and the upper surfaces (24) and has a pit (22), the central portion of the total portion (61) of the peripheral edge (48) intended to come into contact with the upper surfaces (24) of the transverse element (10) to be punched during the blanking movement (62) in a direction corresponding to a width direction of the transverse element (10) to be punched, has a dimension at least as large as a diameter of the corresponding stud (21) and pit (22), and the portions (64a, 64b) that are located on either side of the central element (62) located between the central portion (62) and an end portion (63a, 63b), viewed in a direction corresponding to a height direction of the transverse element (10) to be punched, overlapping a transition present between a portion of the peripheral edge (48) which is intended to come into contact with the retaining surfaces (23) of the transverse element (10) to be punched during the blanking movement and a portion of the peripheral edge (48) which is intended to come into contact during the blanking movement to come into contact with the carrier surfaces (16) of the transverse element (10) to be punched.

9. Dwarselement (10), bestemd om deel uit te maken van een duwband 5 (6) voor een continu variabele transmissie (1), omvattende twee hoofdlichaamsvlakken (11, 12) en een zich tussen de hoofdlichaams-vlakken (11, 12) uitstrekkend omtreksvlak (19), welk omtreksvlak (19) twee aan weerszijden van het dwarselement (10) gelegen opsluit-vlakken (23) voor het in radiale richting van de duwband (6) afbake-10 nen van een positie van dragers (7) van de duwband (6) omvat, en tevens twee op elkaar aansluitende bovenvlakken (24), die elk bij een uiteinde aansluiten op een opsluitvlak (23), omvat, waarbij verschillende gedeeltes van een geheel van de bovenvlakken (24) verschillende oppervlaktekwaliteit hebben. 15Cross element (10) intended to form part of a push belt 5 (6) for a continuously variable transmission (1), comprising two main body surfaces (11, 12) and one between the main body surfaces (11, 12) extending circumferential surface (19), said circumferential surface (19) two retaining surfaces (23) located on either side of the transverse element (10) for defining a position of carriers (7) in the radial direction of the push belt (6) of the push belt (6) and also comprises two mutually connecting upper surfaces (24), each of which connects at one end to a retaining surface (23), wherein different parts of a whole of the upper surfaces (24) have different surface quality. 15

10. Dwarselement (10) volgens conclusie 9, waarbij in het geheel van de bovenvlakken (24) drie verschillende gedeeltes te onderscheiden zijn, en waarbij een centraal gedeelte een hogere oppervlaktekwaliteit heeft dan gedeeltes die aan weerszijden ervan zijn gele- 20 gen.10. Cross element (10) as claimed in claim 9, wherein three different sections can be distinguished in the entirety of the upper surfaces (24), and wherein a central section has a higher surface quality than sections situated on either side thereof.

11. Dwarselement (10) volgens conclusie 9, waarbij in het geheel van de bovenvlakken (24) drie verschillende gedeeltes te onderscheiden zijn, en waarbij een centraal gedeelte een lagere oppervlakte- 25 kwaliteit heeft dan gedeeltes die aan weerszijden ervan zijn gelegen.11. Cross element (10) according to claim 9, wherein three different parts can be distinguished in the entirety of the upper surfaces (24), and wherein a central part has a lower surface quality than parts located on either side thereof.

12. Dwarselement (10) volgens conclusie 9, waarbij in het geheel van de bovenvlakken (24) vijf verschillende gedeeltes te onderschei- 30 den zijn, en waarbij een centraal gedeelte en twee eindgedeeltes een lagere oppervlaktekwaliteit hebben dan twee gedeeltes die aan weerszijden van het centrale gedeelte tussen het centrale gedeelte en een eindgedeelte in zijn gelegen.12. Cross element (10) as claimed in claim 9, wherein five different sections can be distinguished in the entirety of the upper surfaces (24), and wherein a central section and two end sections have a lower surface quality than two sections on either side of the central part between the central part and an end part.

13. Duwband (6) voor een continu variabele transmissie (1), om vattende dwarselementen (10) die onder toepassing van de werkwijze volgens conclusie 1 vervaardigd zijn.A push belt (6) for a continuously variable transmission (1), comprising transverse elements (10) manufactured using the method according to claim 1.

14. Duwband (6) voor een continu variabele transmissie (1), omvattende dwarselementen (10) volgens een willekeurige der conclusies 9-12. 1 0 3 6 3 1 8A push belt (6) for a continuously variable transmission (1), comprising transverse elements (10) according to any of claims 9-12. 1 0 3 6 3 1 8