EP3369493A1 - Method for manufacturing a profile, pointing die and device therefor - Google Patents

Abstract

The invention relates to a method for producing a profile with a target dimension with the following steps
- sharpening one end of an output profile by means of recursively modulated axial forming, so that the profile has a pointed dimension at one end of the profile and there is a sharpened profile with a spigot end,
- Perform the sharpened profile through a molding die and then
- Pulling the sharpened profile through the forming die, so that after passing through the profile has substantially the target size.

Description

The invention relates to a method for producing a profile with a target dimension, a point size matrix and a device for recursively modulated axial shapes.

In continuous casting, which is in particular a drawing of an extruded profile, wherein in particular the starting material for extrusion from continuous casting is formed, in particular a metallic profile, such as copper, pulled by a forming die, so after pulling through the solid profile essentially the shape of the forming die and thus the profile has a target size.

When "threading" the profile to be drawn is pushed through into the forming die. Particularly in cases where filigree structures are to be produced, this threading process is difficult to realize. This is due, for example, to the fact that complex or fine structures bend and thus the threading is not feasible or a large committee is generated.

The object of the invention is to improve the prior art.

• Anspitzen eines Endes eines Ausgangsprofils mittels eines rekursiv modulierten Axialformens, sodass das Profil an einem Profilende ein Spitzmaß aufweist und ein angespitztes Profil mit einem Spitzende vorliegt,
• Durchführen des angespitzten Profils durch eine Formmatrize und anschließendes
• Durchziehen des angespitzten Profils durch die Formmatrize, sodass nach dem Durchziehen das Profil im Wesentlichen das Zielmaß aufweist.

The object is achieved by a method for producing a profile with a target dimension with the following steps

• Sharpening one end of an initial profile by means of recursively modulated axial forming so that the profile has a pointed dimension at one end of the profile and there is a sharpened profile with a spigot end,
• Passing the sharpened profile through a forming die and then
• Pulling the sharpened profile through the forming die, so that after passing through the profile has essentially the target size.

The essence of the invention lies in the fact that a preforming of a profile takes place in such a way that one end of the profile can be passed through a molding die and then the profile can be pulled through the molding die. The preforming of the one end of the profile causes, in particular, if this pre-forming takes place by means of recursively modulated axial forming, that successively reduces a sectional area of the structures of the profile - and thus "sharpened" - becomes. In particular, this recursive modulated axial shapes, the filigree structures of a profile are not so much mechanically changed, as if it is introduced directly into the forming die.

The fact that only a small change takes place at each step of the recursively modulated axial forming, this leads to a later passage through the forming die ("threading") can be ensured with very little waste.

Especially with plastic materials such as copper, this has a huge advantage, since the yield is significantly increased and the rejection is significantly reduced. In addition, the manufacturing process can be carried out without interruption. The sharpening ensures that reliable threading takes place. For example, one end of the profile can be sharpened by means of recursively modulated axial shaping and then rearranged automatically by means of a robot arm or the like and threaded into the format nail.

In addition, with the invention it is possible for the first time to "thread in" filigree structures and to form a profile by pulling them through a forming die. Thus, there is a completely new manufacturing process and the shape of profiles can be significantly increased.

The following concept is explained:

A "profile" is also referred to as a construction profile or mounting profile. Such profiles may, for example, have longitudinal grooves in which, for example, sliding blocks (also referred to as sliding blocks) can be pivoted in.

The "target measure" is in particular the measure which the profile should have at the end of the processing. Consequently, essentially both the profile structure is given and the essential external dimensions are available. However, further treatment steps can be carried out, which essentially relate to the strength and surface quality act, but have very little effect on the dimensions of the profile cross-section.

The target dimension is specified in particular by a "forming die" through which, for example, a copper semi-finished product is "pulled through".

The forming die essentially realizes the cross-sectional area, which forms the shape profile over a length by pulling. Thus, the forming die is essentially responsible for the cross-sectional shape of the profile.

The "pull through" is a forming process and is generally part of the train pressure forming. This is very often used for a wire drawing. For example, the pulling through is realized by means of drum drawing machines, straight pull-out benches or continuous drawing machines.

The "starting profile" is a profile slightly larger in dimension than the profile after being pulled through the forming die.

In the case of recursively modulated axial shapes, the end of the starting profile is pressed further and further into a shape by an axial reciprocating motion, which successively imposes a profile on the end of the starting profile, which is tapered and can be guided by the forming die essentially without contact or correspondingly little contact. In particular, these recursively modulated axial forms become fine or correspondingly filigree Structures not bent in particular copper, but gradually supplied to the appropriate form. For each individual molding, a molding force with which the profile end is pressed into the mold and / or the depth with which the profile end is introduced into the mold can be set. In particular, the recursive effect takes place a few hundred times per second, the optimum frequency depending on the material, profile cross-section, etc. is determined.

When sharpening, the edges at the end of the initial profile are thinned out and thus a cross-sectional area is reduced, so that the end forms a quasi quasi-tip. It is essential, in particular, that the edges are "sharpened" on both sides or correspondingly circumferentially so that the threading into the forming die can be reproducibly secured. Thus, the edges of one end of the starting profile may have a cone or wedge. In particular, due to the recursively modulated axial shapes, these edges can also be tapered in a stepped or bent manner.

After completing the recursively modeled axial forming, there is thus a "sharpened profile" which has a "pointed dimension" at its "profiled end". In this case, the pointed dimension is in particular designed such that a partial insertion of the profile end of the starting profile can be introduced without contact into the forming die. The sharpened profile end can also have constant dimensions over a longer portion, whereby the profile end of the initial profile completely through the Forming die can be performed so that at the end of the forming die, the drawing tool grip the profile end and can produce the profile by pulling the starting profile through the forming die.

Especially for copper profiles with complex geometries can be realized for the first time.

"Complex geometries" are in particular geometries in which a force vector in orthogonal to a mirror axis or in the direction of a mirror point creates a contour at the profile end of the starting profile, which lies outside the contour of the molding die and thus forms a contact with the molding die during threading and to a Would cause bending of the profile end of the initial profile. For example, such complex structures may be webs in a hollow profile and the like.

The "contour" is formed in particular by the material surface of the profile, which forms in a cut at the profile end.

In one related embodiment, the complex geometry is a thin-walled structure or are thin-walled structures or it is a free element or multiple free elements or it has one or more cavities.
"Thin-walled structures" are in particular webs which can not be produced in manufacturing processes according to the prior art. These can range from a few tenths of a millimeter to 3 millimeters. With "thin-walled" In particular, profiles are meant that a ratio between wall thickness and external dimension (eg diameter or edge length) is very large (> = 1:10). Such profiles are also characterized by the fact that due to this situation such thin-walled profiles immediately bend off when "pushed through" by a die.

"Free elements" are for example in a hollow profile grooves or corresponding springs and the like.

"Two cavities" are formed, for example, in that a cavity is bounded by a web.

In order to ensure a simple realization of the sharpening, the recursively modulated axial shaping takes place by means of a point gauge die, which in particular has an axially conical shape cross section.

In this case, the "point-size die" is the component that imprints the profile for the "threading through" the profile end of the starting profile. As a result, the point gauge die thins the edges of the profile end.

To produce an initial profile, this can be made by continuous casting. In particular, copper or copper alloys in particular are used in continuous casting.

In a further embodiment, the initial profile is pressed or rolled, so that a pressed and / or rolled starting profile, in particular a pressed and / or rolled, continuously cast Initial profile, available. This can influence the strength of the profile.

In a further aspect, the object is achieved by a profile which has been produced according to a method described above.

In an additional aspect, the object is achieved by a Spitzmaßmatrize recursively modulated axial forms, which has an axially conical cross section, so that by recursively modulated axial forming a sharpened profile has a Spitzmaß which is dimensionally faithful and in which only the wall thickness of the profile is reduced. Thus, a profile can be produced which ensures a desired dimensional stability and dimensional stability.

In addition, the object is achieved by a device for recursively modulated axial shapes, which has a sharpening template described above.

Figur 1

eine stark schematische Querschnittsdarstellung eines Kupferprofils mit einem Ausgangsprofil, einem Profil mit einem Spitzmaß und einem Profil mit einem Zielmaß,

Figur 2

einen stark schematischen Herstellungsvorgang eines angespitzten Profils in einer Seitendarstellung und

Figur 3

eine stark schematische Querschnittsdarstellung eines Stranggussziehprofils mit mehreren dünnwandigen Strukturelementen, mehreren Hohlräumen und einem freien Element.

Furthermore, the invention will be explained in more detail with reference to an embodiment. Show

FIG. 1

a highly schematic cross-sectional view of a copper profile with an initial profile, a profile with a gauge and a profile with a target,

FIG. 2

a highly schematic production process of a sharpened profile in a side view and

FIG. 3

a highly schematic cross-sectional view of a Stranggussziehprofils with several thin-walled structural elements, multiple cavities and a free element.

An output profile 103 of a copper alloy has the contour of a double-T carrier. This initial profile 103 was obtained by casting and subsequent rolling. In an alternative, the initial profile was obtained by extrusion. As soon as the output profile 103 has been machined by means of recursively modulated axial forming in a point gauge die 223, a profile 105 with a pointed dimension is provided at a profile end 211.

The profile with pointed dimension 105 is smaller in size than the profile with target size 101, this profile 101 corresponding to the desired product shape.

To produce the final product having a profile with the target dimension 101, the starting profile 103 is introduced stepwise in the recursive axial forming direction 241 into a point size die 223. The force and depth with which the output profile 103 is inserted into the point gauge die is set based on the copper alloy so that each time the initial profile is inserted only a molding but no bending of the profile end takes place.

At each step, the starting profile 103 is inserted slightly farther into the point size die 223, and then pulled out again for a short distance. After 400 steps, the output profile 103 at a profile end 211 then has the profile with a peak dimension 105.

Subsequently, the starting profile 103 with the profile end 211 located at the profile 105 is pulled out of the point size jig 223 and threaded through the forming die 221 so that a profile end 211 protrudes from the forming die 221. This profile end 211 is gripped by a gripper (not shown) and pulled through the forming die 221 by a pulling device (not shown).

Thus, the output profile 103 is impressed on a profile with target size 101. Only the profile end 211 has different dimensions than the desired profile 101 with target size. The unwanted part is separated and the final product is present.

Thus, different complex geometries can be realized. This manifests itself in particular on the basis of a cross-sectional area of a profile (see FIG. 3 ). Thus, different connecting webs 357, 359, 361, 363 or even individual elements such as a mushroom element 351 and in particular thin webs 351 can be realized.

LIST OF REFERENCE NUMBERS

101

Profile with target measurement

103

output profile

105

Profile with point size

207

Sharp profile

211

profile end

221

forming die

223

Spitzmaßmatrize

241

recursive axial shape direction

301

complex profile

351

thin bridge

353

cavity

355

mushroom element

357

first connecting bridge

359

second connecting bridge

361

third connecting bridge

363

fourth connecting bridge

Claims (9)

Method for producing a profile (101) with a target dimension with the following steps - sharpening one end of an output profile (103) by means of a recursively modulated axial forming, so that the profile has a pointed dimension at a profiled end (211) and there is a sharpened profile (207) with a spigot end, - Performing the sharpened profile by a forming die (221) and then - Pulling the sharpened profile through the forming die, so that after passing through the profile has substantially the target size. A method according to claim 1, characterized in that the profile has a complex geometry. A method according to claim 2, characterized in that the complex geometry comprises a thin-walled structure (351), thin-walled structures, a free element (355), a plurality of free elements, a cavity (353) and / or a plurality of cavities. Method according to one of the preceding methods, characterized in that the recursively modulated axial shaping takes place by means of a point gauge die (223), which in particular has an axially conical shape cross section. Method according to one of the preceding claims, characterized in that the initial profile is produced by means of continuous casting, so that a continuously cast initial profile is present. Method according to one of the preceding claims, characterized in that the initial profile is pressed and / or rolled, so that a pressed and / or rolled output profile, in particular a pressed and / or rolled continuously extruded starting profile, is present. Profile, which is produced by a method according to one of the preceding claims. Pointed template (223) for recursively modulated axial shapes having an axially conical shape cross section so that a profile sharpened by means of recursively modulated axial forming has a pointed dimension which is dimensionally faithful and in which only the wall thickness of the profile is reduced. An apparatus for recursively modulated axial shapes comprising a point gauge die according to claim 8.

Images