DE102013224314A1 - Method for producing at least one passage opening in a vehicle component and vehicle component - Google Patents

Abstract

The present invention relates to a method for producing at least one passage opening (13) in a vehicle component (7) and such a vehicle component. First, at least one recess (3) is formed in a first component surface (1). Then, at least one bore (10) is formed starting from a second, opposing component surface (2), the bore (10) being formed through the depression (3) to form the passage opening (13). In this way, the emergence of drill caps and / or burrs of the production of the bore (10) is reliably avoided.

Description

The invention relates to a method for producing at least one passage opening in a vehicle component. Furthermore, the invention relates to a vehicle component, in particular a twist beam axle and / or a flange plate, which is produced by the above method.

Numerous separating production methods, such as, for example, cutting or cutting production methods, are known from the prior art. These manufacturing methods have the goal of forming differently shaped through-holes, in particular the formation of rotationally symmetrical bores and / or threaded bores. All of these methods share the inadvertent formation of burrs and / or burrs on the exit surfaces. This affects in particular cutting as well as cutting production processes to a particular extent.

The formation of burrs and / or drill caps on an output side component surface is shown for example in manufacturing processes of the automotive industry. Here, the use of rolled sheets as a starting material for manufacturing processes is common. When using today's methods, the processes therefore show the formation of burrs and / or drill caps, in particular in the case of drilling and / or tapping processes.

In today's practice, therefore, attempts are made to subsequently remove the resulting burrs and / or burrs, which complicate their undefined shape and position subsequent processes, using mechanical and / or chemical methods and devices.

In the DE 10 2007 020 207 B9 a device for through holes with diameters of maximum 10 mm is shown, which removes burrs at the abutting edges of transverse bores.

Here, the machining tool is rotational and / or translational within a transverse bore of a component, e.g. an engine block, moved.

From DBP 1 021 319 a device is known which can remove an inner weld on longitudinally welded pipes after welding. Here, a stored inside a longitudinally welded tube and displaceable by means of a rigid rod second tube and a fixed on a support cutting tool is pressed by means of suitable pressure means against the burr in the tube. With the aid of a counter-pressure member, which is arranged at a location opposite to the weld and supports itself against the inner wall, a corresponding contact pressure is generated.

Finally, the shows DE 10 2012 101 750 A1 an electrolytic deburring process for surfaces, which can come after a material processing to a subsequent Entgratungseinsatz.

For all known deburring methods, the subsequent removal of the burrs and / or burrs resulting from the manufacturing process or machining step is characterized by mechanical and / or chemical processes. This results in decisive economic disadvantages, which arise in particular by higher rework costs. These disadvantages are caused by additional process steps to be performed after the actual processing within the machining processes which are required in the prior art to achieve a deburred surface or edge.

The invention is therefore based on the object to prevent the formation of drill caps and / or burrs in the production of through holes preventive or at least reduce. Another object of the invention relates to a vehicle component, in which no Bohrkappen and / or burrs are present at the through holes.

This object is achieved by a method which has the features of patent claim 1. The subclaims relate to appropriate embodiments and further developments of the method.

Further, the object is achieved in that a vehicle component is produced by the execution of the method according to claim 1.

The basic idea of this invention consists in preventing or at least considerably reducing the occurrence of burrs and / or burrs on through-openings by forming a depression in a first component surface and forming a bore penetrating the depression in a second opposing component surface. In this context, a suitable embodiment of a passage opening, as is possible with the aid of conventional tools, is to be understood as meaning a bore. Above all, a bore, with respect to its bore cross section, is not necessarily a rotationally symmetrical design of a passage opening. A hole can not, with respect to their bore cross-section, one be rotationally symmetrical training such as an ellipse or other training such as a rectangle or a threaded hole. In particular, disadvantages resulting from the use of the known and established deburring methods, especially on common vehicle components, can be prevented. Advantages are in particular a shortened production time in the production of vehicle components. In addition, the subsequent complex mechanical and / or manual removal of burrs and / or drill caps on trained through-holes is eliminated.

Preferably, the formation of the recess takes place at an angle α, which is formed between an axis extending perpendicular to a first component surface axis and a surface region of the recess and has a value of at least 100 ° and a maximum of 170 °. In this case, the angle α is varied mainly by an adaptation of the contour of the recess. In this way, an optimized embodiment of the method is achieved, whereby the use of the method and consequently the control of the occurrence of burrs and / or drill caps is much easier. Alternatively, the angle α can also be adjusted via a suitable inclination of the machining tool for the depression with respect to the first component surface.

Depending on the manufacturing method to be used and the machining tool thus used for the production of the bore, an angle β lying between the actual tool cutting edge of the processing tool used and the surface area of a formed depression is formed. The angle β is between 10 ° and a maximum of 180 °. The angle β is an alternative form of describing the area between a first line perpendicular to the component surface and a surface area of the formed recess. This simplifies a description of the geometric features.

A preferred embodiment comprises a trained depression with a rotationally symmetrical contour. Preferably, the contour of a depression can be brought into a conical or conical shape. The formation of a rotationally symmetrical recess is of particular advantage in series production, since they can be produced easily and inexpensively.

In a further embodiment of the method, the formation of a depression and / or a bore by forming and / or prototyping takes place. The reshaping forming a depression or a bore can contribute to a shortening of the production time by means of cost-effective tools, a rapid processing and a rapid completion of the wells or the holes. In particular, the forming forming a depression or a bore can be carried out simultaneously with other processes such as a stamping process of vehicle components. Alternatively, a formation of the recess or a bore can be carried out by an original shaping. The advantages of this type of training are a fast and near-net shape production and the elimination of rework. In addition, a depression or a bore can be formed with a rotationally symmetrical or non-rotationally symmetrical contour.

A further advantageous embodiment of the invention provides for the use of cutting and / or cutting processes for forming a depression and / or a bore. As a result, the possibility for a variable design of the recess or the bore is given, so that not rotationally symmetric depressions or holes can be produced. The machining can also, as described in a further advantageous embodiment of this method, in particular for reworking, for example, for a recess, which is made by a near-net shape manufacturing process, are applied. Overall, this increases the process reliability of subsequent processes and individual process steps. Furthermore, the formation of the hole is mainly realized by cutting and / or cutting processes. Here, the shape of a hole is not limited exclusively to the shape of a threaded hole or a rotationally symmetrical bores. It should be emphasized that the formation of the bore always takes place on an axis lying essentially coaxially to a formed depression, on a second material surface opposite the first material surface. As a result, in particular not rotationally symmetrical bores can be produced without ridge and Bohrkappenbildung.

The reworking of wells formed by the use of cutting and / or cutting processes is favorable. It is advantageous here that recesses introduced by a machining tool can be transferred quickly and cost-effectively into a final contour.

According to the invention, the diameter of a depression should correspond at most to the diameter of a machining tool for the bore or have a smaller diameter than this machining tool. By a smaller or an equal diameter can be achieved that the resulting Component surface without interference remains because the recess is completely recessed. Consequently, follow-up costs for reworking are reduced and the optical and haptic component surface properties are demand-oriented.

In a development of the method, the recess is designed such that a local change in strength is caused in the component surface around the recess. This can be achieved, in particular, by means of a suitably shaped tool for forming a depression. In the material used is caused by an acting compressive force and / or tensile force remaining in the material science limits increase in strength at room temperature. As a result, the material behavior on the component surface in the region of the depression is influenced in such a way that a drill cap and / or a burr can not arise.

The invention also includes vehicle components such as torsion beam axles and / or flange plates with through holes such as tapped holes made according to the above-described methods. As a possible development, such embodiments of vehicle components are included, which consist of a rolled and strip-like material. Steel sheet is in this case a preferred material for vehicle components, which is characterized in particular by a resulting due to the rolling processes and other accompanying processes, difficult to machine surface material. As a result of the forming in a rolling process, in particular the so-called rolling skin is a layer which has changed material-technological properties. By applying the method described above, the formation of burrs and drill caps can be avoided in vehicle components made of sheet steel, for example, and further process steps can be omitted.

Hereinafter, preferred embodiments of the method and an inventive component will be explained with reference to drawings. The following are shown:

1 a schematic sectional view of a vehicle component having a first and a second component surface, and an inventively designed recess with a conical contour;

2 a schematic sectional view, which is essentially the 1 corresponds and additionally shows a bore producing the first machining tool;

3 a schematic sectional view, which is essentially the 2 and showing the first machining tool penetrating the recess;

3a a schematic sectional view of the 3 corresponds and shows the finished trained passage opening;

4 a schematic plan view showing a vehicle component having a first component surface and a rotationally symmetrical recess according to the invention;

5 a schematic plan view showing a vehicle component having a first component surface and a non-rotationally symmetrical recess according to the invention according to an alternative embodiment;

6 a schematic sectional view of a vehicle component, in which a non-rotationally symmetrical recess according to the invention is formed and an indicated, cutting acting working tool; and

7 a schematic representation of a vehicle component with inventively designed through holes.

Is common in the 1 . 2 . 3 and 3a a vehicle component with a first component surface 1 and a second of these opposing component surfaces 2 shown. A deepening 3 includes a conical or conical surface area 6 , which at its largest diameter, for example, directly to the first component surface 1 of the vehicle component 7 adjacent and one substantially to the component surface 1 vertical axis 14 as a central axis. In the 1 . 2 . 3 and 3a Furthermore, the course of the method according to the invention of the method is shown in fragmentary form, in particular the penetration of a bore 10 training tool 8th and the interaction with the inventively formed depression 3 and an influence zone 12 stand in the foreground.

1 shows one with a depression 3 provided first component surface 1 a vehicle component 7 and an opposite, for example, parallel second component surface 2 , Between a surface area 6 the depression 3 and the axis 14 , which is the central axis of the depression 3 is, an angle α is defined.

In 2 is the machining tool in a machining progress 8th for the formation of the bore 10 in relation to the recess 3 and the axis 14 coaxial with the opposite second component surface 2 penetrated. The tool cutting edge 11 of the bore 10 producing machining tool 8th and the area 6 the depression 3 form an angle β according to the invention in this processing progress.

In a further processing progress shows 3 the piercing of the surface area 6 the trained depression 3 through the used processing tool 8th ,

In 3a is a completed through hole 13 in a vehicle component 7 shown after the execution of the method according to the invention. The passage opening 13 shows the characteristic absence of burrs and / or burrs on the bore exit side first component surface 1 ,

In 4 and 5 two preferred embodiments of the method according to the invention are shown. For the sake of simplicity, a first component surface is 1 a vehicle component 7 shown in sections.

4 shows a recess according to the invention 3 and an associated surface area 6 , which in this embodiment has a conical and rotationally symmetrical course of the contour. The surface area 6 has due to the mentioned course one at the bottom of the depression 3 converging tip, which with respect to the first component surface 1 lowest or farthest point of the depression 3 forms.

Alternatively presented 5 a non-rotationally symmetric recess 3 and a non-rotationally symmetric course of the surface area 6 in the first component surface 1 , The recess shown in this embodiment 3 indicates due to the course of the surface area 6 no point-like converging peak at the lowest point of the depression 3 on, but a rectangular-like education.

6 shows in a schematic sectional view of a section along the axis VI-VI in 5 the formation of a deepening 3 in a non-rotationally symmetric contour with a second machining tool 9 which can work, for example, in a cutting process and for producing a, not shown, from the second component surface 2 outgoing bore is used. Furthermore, in the area around the depression 3 a by the method according to the formation of the recess 3 resulting influence zone 12 shown. Analogous to the in 1 . 2 . 3 and 3a shown process steps is the machining tool 9 the surface area 6 the non-rotationally symmetric recess 3 penetrate and a through hole 13 form.

An inventive vehicle component, as in 7 shown, shows through holes produced according to the invention 13 ,

LIST OF REFERENCE NUMBERS

1

 first component surface

2

 second component surface

3

 deepening

6

 Area on the depression

7

 vehicle component

8th

 first processing tool

9

 second processing tool

10

 drilling

11

 cutting edge

12

 affected zone

13

 Through opening

14

 axis

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102007020207 B9 [0005]
• DE 102012101750 A1 [0008]

Claims (10)

Method for producing at least one passage opening ( 13 ) in a vehicle component ( 7 ), characterized in that at least one recess ( 3 ) in a first component surface ( 1 ) is formed, that at least one bore ( 10 ) from a second, opposite component surface ( 2 ) is formed, and that the bore ( 10 ) through the depression ( 3 ) through to form the passage opening ( 13 ) is formed. Method according to claim 1, characterized in that the depression ( 3 ) at an angle α between a first component surface ( 1 ) perpendicular axis ( 14 ) and a surface area ( 6 ) of the depression ( 3 ) is generated, wherein the angle α is a minimum of 100 ° and a maximum of 170 °. Method according to claim 1 or 2, characterized in that between a tool surface, here preferably a tool cutting edge ( 11 ) one of the bore ( 10 ) training tool ( 8th . 9 ), and the area ( 6 ) of the depression ( 3 ) an angle β is generated, wherein the angle β is between 10 ° and 180 °. Method according to one of claims 1 to 3, characterized in that the recess ( 3 ) is formed in a rotationally symmetrical, preferably cone-like shape. Method according to one of claims 1 to 4, characterized in that the formation of the recess ( 3 ) and / or the bore ( 10 ) takes place by forming and / or prototyping. Method according to one of claims 1 to 5, characterized in that the formation of the recess ( 3 ) and / or the bore ( 10 ) by a cutting and / or cutting process. A method according to claim 5 or 6, characterized in that a post-processing of the formed depression ( 3 ) by a cutting and / or cutting process. A method according to claim 4, characterized in that the maximum diameter of a rotationally symmetrical recess ( 3 ) equal to or smaller than the diameter of a bore ( 10 ) forming processing tool ( 8th . 9 ). Method according to one of claims 1 to 8, characterized in that the formed recess ( 3 ) is designed such that in a limited zone of influence ( 12 ) around the depression ( 3 ) around a local increase in strength of the base material compared to the starting base material, in particular by cold deformation, is achieved. Vehicle component ( 7 ), in particular a torsion beam axle and / or a flange plate, characterized in that at least one passage opening ( 13 ) is carried out according to one or more of the preceding method claims.

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