FR2622488A1 - Installation for manufacturing a strip of deformable material with a non-constant cross section, particularly a metal strip and, in particular a copper strip - Google Patents

Abstract

a) Installation for manufacturing a strip of deformable material. b) Installation characterised in that, in order to hammer the strip, it includes a linear tool 15, 151, 154 in at least one part, forming a certain angle with respect to the relative advance direction A of the strip 11 with respect to the tool 15. c) The invention relates particularly to the manufacture of copper strips with a non-constant cross section.

Description

"Installation for manufacturing a strip of material
deformable with non-constant cross-section in particular of
metallic strip, in particular a copper strip.

 The present invention relates to an installation for manufacturing a strip of deformable material with a non-constant section, in particular a metal strip, in particular a copper strip.

 The invention relates in particular to an installation for manufacturing a strip of deformable material, in particular a copper strip of non-constant section, installation in which the strip is made to move relative to a tool acting in the transverse zone of the running of the strip by a succession of elementary crushings, each of which concerns only a fraction of the part whose thickness is to be reduced by progressively widening the part of reduced thickness by crushing the adjacent parts which are still at the previous thickness, and simultaneously on the transverse zones downstream and upstream, such elementary crushings are carried out but offset in a complementary manner in the transverse direction of the strip so that overall the section of the strip progressively evolves in the machining zone, in the direction of travel. between the initial section and the final section.

 There are currently various methods for manufacturing a metal strip of non-constant cross section starting from a strip of generally rectangular cross section.

 The oldest and best known method consists in carrying out machining by removing chips in order to obtain the desired section. A more recent method consists in laminating the strip in a different way to achieve the desired non-constant section.

 In the context of this second method, there is also a derived method consisting in hammering the starting strip using a tool, for example a triangular one.

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It is also possible to laminate a previously hammered strip to carry out finishing work.

 The machining process by chip removal has the disadvantage of a significant loss of material corresponding to the part removed. The rolling process has the disadvantage of arriving at a relatively irregular strip and the hammering process using a triangular tool has the disadvantage of requiring extremely high hammering forces because the working surface or surface tool support is very large.

 I1 was also envisaged a hammering process using a hollow tool (FR 81 20 463). This known method has considerable advantages over the other methods mentioned above.

 The present invention aims to improve and develop an installation for the implementation of the latter process.

 To this end, the invention relates to an installation of the above type, characterized in that, to hammer the strip, it comprises a linear tool in at least one part making an angle with respect to the relative direction of travel (strip /tool).

 The invention also relates to an installation characterized in that it comprises a tool composed of several parts directed transversely to the direction of relative movement of the strip to be worked.

 According to another characteristic of the invention, the constituent elements of the tool are inclined in the same direction or in the opposite direction with respect to the direction of travel and these tools are all located in the same transverse zone.

 According to another characteristic of the invention, the elements are arranged in transverse zones offset in the direction of movement.

 According to another characteristic of the invention, the tool is formed of an upstream element and a downstream element, the downstream element exactly following the outer end of the upstream element and each of the elements is inclined by opposite direction of travel.

 The invention also makes it possible to produce several longitudinal zones of reduced thickness and in particular two zones. Such an installation is characterized in that it comp-orte a tool composed of two tool elements inclined relative to the direction of movement and whose front ends are spaced apart by a distance corresponding to the width of the intermediate strip which remains at the initial height.

 In this case, it is particularly advantageous that the two elements have the same length in order to produce two parts of reduced thickness and of the same width.

 According to another characteristic, to produce a strip with at least two parts of reduced thickness, of different width, the elements constituting the tool are of different length and / or inclination relative to the direction of movement.

The present invention will be described in more detail with the aid of the accompanying drawings in which
- Figure 1 is a sectional view of the section of a strip showing by hatching the hollowed out part by machining by chip removal according to the prior art.

 - Figure 2 is a top view, schematic of the trace of a first tool according to the invention acting on a strip.

 - Figures 2A and 28 are respectively the section of the strip before the action of the tool and after the action of the tool.

 - Figure 3 is a top view of the trace of a tool cooperating with a strip to change its thickness.

 - Figures 3A and 38 are respective sectional views of the strip upstream and downstream of the tool.

 - Figure 4 is a plan view of another embodiment of a tool showing the trace of the tool on the strip being deformed.

 - Figures 4A and 48 are respective sections of the strip upstream and downstream of the tool.

 - Figure 5 e-st a top view of the trace of another embodiment of a tool for forming two strips of reduced thickness in the strip of material to be transformed.

 - Figures 5A and sB are respective sectional views of the strip upstream and downstream of the tool.

 - Figure 6 is a plan view of another embodiment of a tool showing its double trace forming two parts of reduced thickness and different width.

 - Figures 6A and 68 are respective sectional views of the strip upstream and downstream of the tool.

 - Figure 7 is a plan view of the trace of a particularly simple embodiment of a tool according to the invention.

 - Figures 7A and 78 are sectional views of the strip upstream and downstream of the processing zone.

FIG. 8 shows a variant of a tool according to the example in FIG. 7,
- Figure 9 is a cross-sectional view of a tool element according to any one of the preceding figures.

 The invention relates to an installation for manufacturing a strip of deformable material, in particular a copper strip of non-constant section.

 According to this method, the strip is made to move relative to a tool acting in the transverse zone of the running of the strip by a succession of elementary crushings, each of which concerns only a fraction of the part whose thickness is to be reduced in progressively widening the part of reduced thickness by crushing the adjacent parts which are still at the previous thickness, and simultaneously on the transverse zones downstream and upstream, such elementary crushings are carried out but offset in a complementary manner in the transverse direction of the strip so that overall the section of the strip progressively evolves in the machining area, in the direction of travel between the initial section and the final section.

 To hammer the strip, the installation comprises a linear tool, in at least one part, making an angle relative to the relative direction of travel (strip / tool>.

 This hammering has the effect of pushing the material to the sides by widening the strip without stretching it, either globally or partially.

 An installation for the implementation of this process will be described below for the main part, namely the tool which ensures the hammering. The support of this tool is a flat surface with no particular characteristics and it will neither be described nor shown.

 It is further noted that, for the sake of simplification, since the active shape of the tool corresponds to its trace on the strip to be worked, this tool will be described below, in almost all cases by its trace.

 According to Figure 1, the sectional view corresponds to the section of a strip 1 of raw material from which we want to remove the hatched part 2 to leave only the non-hatched part leaving a strip of constant thickness is produced a strip of non-constant section with a reduced height median part bordered by two lateral sides of greater height, machining by removing chips. The hatched part corresponds to the material removed.

 The disadvantages of this method of chip removal have already been discussed above.

 Figure 2 shows the implementation of the method according to the invention using a first embodiment of an installation. This process has the aim, starting from a strip 10 of rectangular section shown in FIG. 2A, to lead to a strip 11 formed of two edges 12, 13 of unmodified height and of an intermediate part 14 whose height has been reduced. For this, the installation comprises a tool 15 formed of four linear elements 151-154 all arranged one beside the other so that, seen in the direction of travel of arrow A, the upstream end and the rear end tools follow each other and leave a trace corresponding to the entire width L of the part 14 of reduced thickness to be produced.

 According to: the invention, this tool 15 performs hammering while the strip passes under the tool with a chosen relative speed; the direction of relative movement is indicated by arrow A.

 For example, such a tool can ensure a strike of the order of 1,500 strokes / minute; the elements 151-154 constituting the tool 15, can have a length of the order of 100 mm and a width or thickness of the order of 4 mm. In this case, the production or running speed of the strip is greater than 10 m / min.

 The inclination of the various elements 151-154 in one direction or the other relative to the direction of travel must be less than or equal to about 20O so as to discharge the material only in the transverse direction and not in the longitudinal direction .

 FIG. 3 shows another example of a method and an installation according to the invention.

 As before, the installation comprises a tool 25 composed of the elements 251 and 252 for transforming the section 20 (FIG. 3A) of the strip of material into the section 21 formed as —a'— FIG. 28 with two edges 22, 23 d 'thickness corresponding to the initial thickness and an intermediate portion 24 of reduced thickness.

 The elements 251-252 constituting the tool 25 are arranged one behind the other in the direction of relative movement A of the strip 20, 21 relative to the tool 25. It should be noted that the front end 252A of the tool element 252 is in alignment (in the direction of travel) of the front end 251A of the tool element 251.

The rear end 2518 of the element 251 and the rear end 252A of the tool element 252 correspond respectively to the internal edge or to the transition between the edge 22, 23 and the intermediate part 24.

 Figure 4 shows another variant of the invention.

In this installation, the tool 35 consists of an upstream element 351 and a downstream element 352 to transform the section 30 of the strip (FIG. 4A) into the section 31 (FIG. 48) formed by two lateral edges 32, 33 and an intermediate part 34.

 In this example, the upstream element 351 of the tool 35 provides a certain reduction in thickness, a reduction which is supplemented by that ensured by the rear element 352. The rear end 3518 of the element 351 is directly followed by The front end 352A of the downstream element 352. This end 352A defines the edge 32 while the rear end 3528 defines the other edge 31.

 The variant of la.figure 5 corresponds to an installation with a tool 45 formed of two elements 451, 452 disposed substantially at the same height in the direction of travel (arrow A) to transform the rectangular section 40 of the strip (FIG. 5A) in a section 41 formed of two edges 42, 43 and of a middle part 44 both having the same thickness or initial thickness, these three parts at the initial thickness being separated by an intermediate part 46, 47, of reduced thickness.

 Each inclined linear element 451, 452 of the tool 45 produces, in the manner described above, the two parts: s of reduced thickness 46, 47.

 Figure 6 shows a variant of the installation tool of Figure 5. This tool 55 consists of an element 551 and an element 552 to transform the section 50 of the strip (Figure 6A) into the section of FIG. 68 comprising two lateral parts 52, 53, an intermediate part 54 all three at the initial thickness of the section 50; these three parts are separated by intermediate parts 56, 57 of reduced thickness.

 The different length of the two linear elements 551, 552, constituting the tool 55, makes it possible to have different widths for the parts 56, 57 while having substantially the same inclination of the two elements 551, 552 relative to the direction of movement. indicated by arrow A.

 Figure 7 shows a simplified variant of the examples of the previous figures. In this case, the tool 65 consists of a single linear element. This tool makes it possible to transform section 60 (FIG. 7A) into section 61 of FIG. 78 (which corresponds substantially to the section shown in FIG. 28). This section has two edges 62, 63 whose thickness is the thickness of the initial section 60; these edges are separated by an intermediate portion 64 of reduced thickness.

This figure also shows the relationship between the pitch e, the angle of inclination of the tool relative to the direction of movement A, the length 1 of the linear element constituting the tool 65 and its thickness e
According to the invention, the necessary equipment additionally comprises
of the tool and its tool holder, the press - for example
to press the strip between the tool and the anvil and the
tape step feed device.

Equipment may include other accessories
such as wire feeders, welder, heat treatment oven
continuous, pickling, brushing, finishing mills,
winders.

When the requested profiles are relatively thin, it is interesting to profile a blank first
whose different thicknesses are in equal proportion
to those of finished products. Therefore, the lengthening of
thin and thick parts being the same to arrive at the
finished product, this operation can be done in a rolling mill
normal, fitted with adequately grooved cylinders.

Finally, to improve the surface condition of
the strip obtained at the output and to arrive at a state of
perfect surface of the strip thus hammered, it is before
that each linear element of the tool has a section which corresponds to that of FIG. 9 with a width e
and a f leave in its front part, the actual support of the tool bearing the reference 100, the element of the tool
reference 101.

Figure 8 shows a tool variant 75
in Figure 7. Figure 8 actually shows the tool and
its support 76.

Unlike Figure 8, all others
Figures 2, 3, 4, 5, 6 and 7 do not show the tool but the
trace left by the tool or the elements each time
of tools or a cut to a certain height through
the element forming the tool. It should be noted that the tool
non-rectilinear in Figure 8 allows in some cases
to better finish the interior angles of the fabricated strip.

Other combinations of tools or tool elements
in the spirit of those described above can be considered
without departing from the scope of the invention.

Claims (8)

 10) Installation for manufacturing a strip of deformable material, in particular a copper strip of non-constant section, installation in which the strip is made to move relative to a tool acting in the transverse zone of the running of the strip by a succession elementary crushing, each of which only concerns a fraction of the part whose thickness is to be reduced by gradually widening the part of reduced thickness by crushing the adjacent parts which are still at the previous thickness, and simultaneously on the zones transverse downstream and upstream, such elementary crushing is carried out but offset in a complementary manner in the transverse direction of the strip so that overall the section of the strip progressively evolves in the machining zone, in the direction of travel between the initial section and the final section, installation characterized in that, to hammer the strip, it comprises a linear tool (15, 25, 35, 4 5, 55, 65, 75) in at least one part, making an angle with respect to the relative direction of travel (A) (strip / tool).  20) Installation according to claim 1, characterized in that it comprises a tool composed of several parts (151, 154, 251, 252, 351, 352, 451, 452, 551, 552) directed transversely relative to the direction of relative displacement of the strip to be worked.  30) Installation according to claim 2, characterized in that the constituent elements (151-551, 65, 75) of the tool are inclined in the same direction or in the opposite direction relative to the direction of travel (A) and these tools are all located in the same transverse area.  40) Installation according to any one of claims 1 to 3, characterized in that the elements (251, 252, 351, 352) of the tool are arranged in transverse zones offset in the direction of movement.  50) Installation according to claim 1, characterized in that the tool (35) is formed of an upstream element (351) and a downstream element (352), the downstream element exactly following the outer end of the upstream element and each of the elements is inclined with respect to the direction of movement in an opposite manner.  60) Installation for producing a strip having two longitudinal zones of reduced thickness, according to any one of claims 1 to 5, characterized in that it comprises a tool composed of two tool elements-- ( 451, 452, 551, 552) inclined relative to the direction of movement (A) and the front ends of which are spaced apart by a distance corresponding to the width of the intermediate strip (44, 54) which remains at the initial height.  70) Installation according to claim 6, characterized in that the two elements (451, 452) have the same length to produce two parts (46, 47) of reduced thickness and the same width.  80) Installation according to claim 1, for producing a strip with at least two parts of reduced thickness, of different width, characterized in that the elements (551, 552) constituting the tool, are of length and / or different inclination with respect to the direction of travel (A).