EP3228401A1 - Workpiece guide for a processing machine for elongated workpieces, particularly wire - Google Patents

Abstract

In a workpiece guide (4) for a processing machine for elongated workpieces, in particular wire (6), for guiding the wire (6) to a machining tool (3), with a holder (1) for attachment to the processing machine and with a attached thereto Boom (2), at the protruding end portion of a tool holder (5) is inserted, which passes through the wire (6) via a guide groove (7) and in which a replaceable tool insert (8) is added. The tool holder (5) comprises two receiving parts (9, 10), which support the tool insert (8) on both sides and engage on its underside each with a projecting leg (11, 12). Between the two legs (11, 12) over its entire length, a gap (13) is formed, within which the tool insert (8) is fixed on its underside on the boom (2).

Description

The invention relates to a workpiece guide for a processing machine for elongated workpieces, in particular wire, for guiding a supplied workpiece to a machining tool, with a holder for attachment to the machine tool and with a bracket attached to the bracket, the projecting end portion comprises a tool holder, the the workpiece supplied to it passes through a guide groove and in which a replaceable tool insert is received, which forms the outlet-side end region of the guide groove.

Workpiece guides of this type are used on elongated workpieces, such as wire, bar and tube processing machines, for axially guiding the workpiece (such as wire) and dispensing it into the processing space of a downstream processing gear. Usually such workpiece guides are generally referred to as "wire guides", even if they are not used exclusively for wire, but also for other elongated workpieces (rods or tubes). In this sense, the term "wire guide" is used for such a workpiece guide below, even if the relevant workpiece guide is provided for processing machines, which is the processing of workpieces, such as pipes, rods, strips o. Ä.

The wire guides serve in addition to their function to guide the workpiece in question, but also to serve as a counterpoint when editing (cutting, bending or winding) of the workpiece. In many cases they are exposed to very considerable loads and unavoidable wear. Therefore, the wire guides must be designed according to the specific requirements of the application for which they are intended, and replaced at intervals.

If an entire wire guide must be replaced, this is associated with significant costs, since the entire wire guide is usually made of high-strength material in order to achieve the longest possible service life.

In the EP 1 577 032 B1 For a fairly long one- or two-piece workpiece guide is described in which a very long guide channel is used. In this case, the workpiece guide itself is fastened to an associated holder by means of a T-groove formed on it and running parallel to the workpiece direction. The guide channel must be made in this known workpiece guide over its entire relatively long length very accurately, the entire workpiece guide consists of a single material, which also applies to their unloaded areas, which is why the replacement of the workpiece guide is in turn associated with very significant costs , Thus, during regrinding the entire wire guide must be removed or even completely replaced.

From the JP 08-252645 A is a two-part workpiece guide for a spring manufacturing machine is known, which is supported by a receptacle on the machine. The adjacent two workpiece guide halves are laterally braced against each other and held in this manner. This workpiece guide is relatively long and in turn made of a material with the result that the guide bore be introduced over the entire guide length and thereby the entire workpiece guide must be made of a relatively expensive material.

At the time of the DE 299 13 015 U1 described workpiece guide is mounted on the end of a boom, a guide block and between this and a centrally provided in the holder passage opening a two-part guide portion is provided, through which the delivered wire is forwarded to the guide in the guide block. In its axial central region, the guide block in turn encloses a central axle made of tungsten or another high-speed steel accommodated there, is formed as a tubular body and contains over its axial length a bore which forms the guide groove. This ensures that in the event of the need for replacement, such as when the central axle is worn or destroyed, only the guide block with embedded Mittelachsteil or even the Mittelachteil itself must be replaced without the entire structure of the material guide between the holder and the output of the Guide block with replace. However, in this known wire guide and the guide hole must be introduced over the entire wire guide length, which in turn is costly.

A wire guide of the type mentioned is in the DE 10 2009 039 225 B4 described. Here, the wire guide consists of a receptacle and one or more tool inserts, which are designed as sliding blocks. In this case, a very high accuracy of the inserts is required, and the fixation of the inserts in the receptacle is expensive.

Proceeding from this, the present invention seeks to further develop a workpiece guide of the type mentioned that while maintaining the limitation of the proportion of high-priced materials while avoiding high passport requirements a simple regrinding excluding the actual wear part as well as a particularly simple production and assembly allowed.

According to the invention this is achieved in a workpiece guide of the type mentioned in that the tool holder comprises two receiving parts which support the tool insert on both sides and engage it on its underside over a lateral edge region away with a projecting leg, wherein between two legs over the entire length an intermediate space is formed, within which the tool insert is fixed on its underside on the boom.

In the workpiece guide according to the invention initially eliminates the required in the generic state of the art training at least one sliding block with associated receiving groove and the associated, very high accuracy of fit, which is required for its use. The complex with such Nutensteinen fixation of the inserts in the recording is no longer required.

Due to the design of the tool holder in two independent receiving parts, each of which rests along one side of the interchangeable tool insert and this engages on its underside in its edge region by a projecting leg, wherein the two cross-leg over their entire length away between them a gap freely leave, through which the tool insert is fixed on its underside on the boom, an arrangement is provided in which the partially embedded in the projecting end portion of the boom tool holder is fixed and supported only by the fixing of the tool bit on its underside on the boom. This attachment is preferably effected by screws or bolts o. Ä., The screws or bolts in the formed between the two projecting legs of the two receiving parts of the tool holder free space. Due to the force with which the tool insert is clamped downwards relative to the boom, the tool insert presses in its lateral edge regions on there each under him cross, projecting legs of the two receiving parts of the tool holder and presses them against their assigned in the tool holder bottom , At the same time a tension of the tool insert between the two receiving parts is effected.

The design of the individual parts, which occur here in the overall arrangement in mutual operative connection, requires neither elaborate designs, nor high fitting accuracies, so that the items, once you see the attachment of the guide in the workpiece holder, are neither expensive in the production , still require a difficult assembly. Here, the tool insert the special requirements (in terms of wear, hardness, impact load, toughness, heat, etc.) of the respective application (such as cutting, forming, friction, etc.) are designed accordingly, as well as for different workpiece geometries (cross sections, diameter), so that a particularly rapid change of the tool insert is possible. The materials of the receiving parts and the tool insert can be chosen in any desired meaningful combination and the use of costly materials are limited to use in the tool insert.

The fact that the required attachment of the tool insert is located on the underside of the holder, a flat surface design without screws, elevations, edges o. Ä. Is reached, whereby the working space can be better used.

An advantageous embodiment of the workpiece guide according to the invention is that the two receiving parts of the tool holder are partially embedded in the boom of the upper side and overlap it with their projecting above each section after the respective outer side. This leads to a particularly large support surface between the arrangement of the tool holder and the boom and thus to a particularly good support of the same at this.

In the invention, the tool insert can be secured to the boom by any suitable fastening means, but most preferably the attachment is by screws or bolts.

Another preferred embodiment of the workpiece guide according to the invention also consists in the fact that the two receiving parts of the tool holder below the tool insert are fastened to each other by transverse to the longitudinal axis of the tool holder extending screws or bolts, which in the assembled state additionally causes a tension of the two receiving parts against each other, creating a Particularly good lateral fixation of the tool insert is created.

The configuration of the two receiving parts of the tool holder can be made in the invention in any suitable form. However, it is especially advantageous if the two receiving parts of the tool holder formed in mirror image to each other and are also arranged in mirror image to each other on the boom.

A favorable embodiment of the invention can also be achieved in that the receiving parts of the tool holder made of PM steel and the tool insert made of hard metal is formed.

It is also advantageous if, in the invention, the tool insert is divided centrally in the longitudinal direction. In this embodiment, the two resulting inserts could be formed of different materials, so that z. B. one side (eg., Tungsten carbide) for winding and the other side (7. B. PM steel) used for wire cutting.

Also preferably, a lateral recess is provided on each of the legs of the receiving parts, through which the tool insert on the boom can be fixed by a respective fastening means.

Fig. 1

die perspektivische Darstellung des Arbeitsbereiches einer Drahtbearbeitungsmaschine mit einer erfindungsgemäßen Werkstückführung;

Fig. 2

eine perspektivische Darstellung einer erfindungsgemäßen Werkstückführung im fertigmontierten Zustand;

Fig. 3

eine Vorderansicht der Werkstückführung aus Fig. 2;

Fig. 4

eine perspektivische Darstellung einer erfindungsgemäßen Werkstückführung in einem demontierten Zustand;

Fig. 5

eine Ansicht auf ein Teilstück einer erfindungsgemäßen Werkstückführung von unten;

Fig. 6

eine perspektivische Darstellung einer weiteren Ausführungsform einer erfindungsgemäßen Werkstückführung in fertigmontiertem Zustand, und

Fig. 7

eine Ansicht auf ein Teilstück einer weiteren erfindungsgemäßen Werkstückführung von unten.

The invention will be explained in more detail by way of example with reference to the drawing in principle. Show it:

Fig. 1

the perspective view of the working area of a wire processing machine with a workpiece guide according to the invention;

Fig. 2

a perspective view of a workpiece guide according to the invention in the finished assembled state;

Fig. 3

a front view of the workpiece guide Fig. 2 ;

Fig. 4

a perspective view of a workpiece guide according to the invention in a disassembled state;

Fig. 5

a view of a portion of a workpiece guide according to the invention from below;

Fig. 6

a perspective view of another embodiment of a workpiece guide according to the invention in the assembled state, and

Fig. 7

a view of a portion of another workpiece guide according to the invention from below.

In the following description of the figures, the same reference numerals are used in the representation of different embodiments for parts having the same function.

Fig. 1 shows a section of a (otherwise not shown) wire processing machine, which is associated with a holder 1 or to be attached thereto.

On the holder 1, a boom 2 is mounted, which carries a workpiece guide 4 at its front end portion. This includes a tool holder 5, which, like Fig. 1 shows, from the top of the boom 2 ago something in this is recessed and in the middle of a over the entire length of the tool holder 5 extending tool insert 8 is attached.

As Fig. 1 Furthermore, a workpiece 6 in the form of a wire is conveyed, fed to the workpiece guide 4, by a guide groove 7 formed in the tool insert 8 (cf. FIGS. 2 and 3 ) and then fed to a downstream processing tool (in the case shown: a knife 3).

For a closer view of the workpiece guide 4 is now on the representations of FIGS. 2 and 3 referenced, wherein Fig. 2 a perspective view of a workpiece guide 4 in the mounted state (but without representation of the boom 2) and Fig. 3 a front view of the workpiece guide 4 from Fig. 2 shows.

From these figures it can be seen that the in Fig. 1 nor workpiece attachment designated by the reference numeral 5 consists of two receiving parts 9, 10, each of which abuts on one side of the tool insert 8 at this, wherein the tool insert 8, seen in the longitudinal direction of the supplied wire 6 and the boom 2, over the entire length which consists of the receiving parts 9 and 10 existing tool holder 5.

Centered in the upper region of the tool insert 8, the guide groove 7 is attached, which extends in the embodiment shown in the tool insert 8 over its entire length.

The receiving parts 9 and 10 are formed so that they engage below on their underside each with a leg 11 and 12, the tool insert 8 via a respective edge region a and b and over the entire length of the tool insert 8 away, wherein as a rule the width of the Edge region a of the other edge region b corresponds.

The two mutually aligned legs 11 and 12 leave between them (and again over the length of the tool insert 8 away) a gap 13 free, will be to come back to later.

Each of the two receiving parts 9 and 10 is formed on its legs 11 and 12 opposite top in each case so that it forms with its local portion each having an outwardly projecting wings 18 and 19, each on its underside on the surface of the Jib 2 rests.

At the in Fig. 3 shown embodiment, indicated by dashed lines, bolt 17 indicated that connect the opposing end surfaces of the two legs 11 and 12 in the gap 13, wherein in practical use here, the use of two bolts 17 is sufficient, one in the axially front and the other in the axially rear portion of the legs 11, 12 is provided.

In the illustrated embodiment, the tool insert 8 extends over the entire length of the workpiece holder 5 (or their receiving parts 9 and 10). However, it could also be shorter or longer than the workpiece holder 5; It is only important that workpiece holder 5 and tool insert 8 at the location of the wire outlet are flush with each other.

The tool insert 8 consists of a high-quality material, such as tool steel or hard metal, ceramic or fiber composites o. Ä., While the other parts of the workpiece guide 4, where the loads are not so high, are made of less expensive material.

The tool insert 8 is replaceable and secured on its underside within the intermediate space 13 in a suitable manner on the boom 2. Fig. 5 shows a look at a section on the underside of such a workpiece guide 4, where it can be seen that are provided in the region of the gap 13 at the bottom of the tool insert 8 in these two threaded holes 16, in which in the assembled state from below on the boom. 2 mounted bolt or mounting screws to make the desired attachment can engage.

Due to the attachment of the tool insert 8 from below is now achieved that this is pressed with its two lower edge areas a and b against the upper side of the two legs engrossing him 11, 12 of the receiving parts 9 and 10, which then with the undersides their upper wings 18 and 19 are supported from above on the boom 2.

The total kinematics realized here results in that the tool insert 8 is clamped between the two receiving parts 9 and 10 of the tool holder 5 and firmly fixed within the receptacle within which the recessed into the boom 2 section of the tool holder 5, is well fixed ,

The receiving parts 9 and 10 of the tool holder 5 and the tool insert 8 are in Fig. 4 shown again in the disassembled state and in a perspective arrangement (with the possibility of the arrangement of bolts 17 for mutual bracing of the projecting legs 11 and 12 of the receiving parts 9 and 10 in the representation of Fig. 4 not taken into account).

In Fig. 6 Finally, the perspective view of another, slightly modified form of a workpiece guide 4 is shown:

In contrast to the embodiment according to the FIGS. 1 to 4 Here, the guide groove 7 is not designed as a circular cross-section bore, but it is provided with a polygonal cross-section, as he z. B. can be used for processing profile wire.

Also, in the embodiment according to Fig. 6 the surface of the tool insert 8 is formed flat, so that this shows a rectangular cross-section.

Fig. 7 shows yet another embodiment in the form of a view of a portion of a bottom view of a workpiece guide.

In contrast to the embodiment, which in Fig. 5 Shown here is in each case a threaded bore 16 in a lateral recess 20 and 21 in each leg 11 and 12 of the receiving parts 9 and 10 provided so that here thus the fastening means between the tool holder 5 and tool insert 8 in the form of z. B. screws not longitudinally, but can be mounted transversely to the longitudinal direction of the tool insert 8.

The guide groove 7 can, as in the examples shown in the figures, be offset by a small distance into the interior of the tool insert 8. However, it is also possible to provide the guide groove 7 open at the top, for which purpose the tool insert 8 is ground accordingly on its upper side, so that z. B. the groove 7 remains slightly above its half. This ensures that smaller wind conditions (eg w _m = 5) can be achieved.

Claims (8)

Workpiece guide (4) for a processing machine for elongate workpieces, in particular wire, for guiding a supplied workpiece (6) to a machining tool (3), with a holder (1) for attachment to the processing machine and with a bracket attached to the holder (1) (2), at the protruding end region of which a tool holder (5) is inserted, which passes through the workpiece (6) supplied to it via a guide groove (7) and in which a replaceable tool insert (8) is received, which supports the exit-side end region of the guide groove (8). 7), characterized in that the tool holder (5) comprises two receiving parts (9, 10) which support the tool insert (8) on both sides and on its underside over a lateral edge region (a, b) away with a projecting leg (11, 12) engage, wherein between the two legs (11, 12) over its entire length, a gap (13) is formed, innerh alb of which the tool insert (8) is fixed on its underside on the boom (2). Workpiece guide according to claim 1, characterized in that the two receiving parts (9, 10) of the tool holder (5) are partially embedded in the arm (2) from its upper side and with its projecting portion (14, 15) each after the Overlap outside. Workpiece guide according to claim 1 or 2, characterized in that the tool insert (8) on the boom (2) is fixed by screws. Workpiece guide according to one of claims 1 to 3, characterized in that the two receiving parts (9, 10) of the tool holder (5) below the tool insert (8) are secured to each other by transverse screws or bolts. Workpiece guide according to one of claims 1 to 4, characterized in that the two receiving parts (9, 10) of the tool holder (5) are mirror images of each other. Workpiece guide according to one of claims 1 to 5, characterized in that the receiving parts (9, 10) of the tool holder (5) made of PM steel and the tool insert (8) made of hard metal is formed. Workpiece guide according to one of claims 1 to 5, characterized in that the tool insert (8) is divided centrally in its longitudinal direction. Workpiece guide according to one of claims 1 to 6, characterized in that the receiving parts (9, 10) on its underside on each of its legs (11, 12) with a lateral recess (20, 21) are provided, within each of which a fastening means for Attaching the tool insert (8) on the boom (2) is provided.

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