EP1577032B1 - Wire guide for a wire processing machine, in particular a spring manufacturing machine - Google Patents

Abstract

The wire guide (1) has a recess (2) to which of wire guide block (3) is fixed. This forms a guide groove (4) for the wire. It is on the side of the wire guide block facing the recess, with a form body (6) positively anchored to it. The form body is stretched over a fixing device (7) against the recess, and is fixed to it.

Description

The invention relates to a wire guide for a wire processing machine, as can be used in particular in spring manufacturing machines, for guiding a supplied wire to wire processing tools, with a receptacle on which a wire guide block is releasably attached, which forms a guide groove for the wire (see, eg US-A-6 098 444).

Known wire guides for wire processing machines are usually attached for reasons of space and in view of the desired slenderness of construction by means of clamping claws (in the form of Außenpratzen) to the recording, which are recognized by the receiving side facing away from the wire guide ago. Since when fixing a clamping claw with only one screw an optimal clamping force can not be applied, it is common to screw each clamping claw with two screws. In the interest of a uniform force distribution of the fastening force also two clamping claws are used, one above and one below the guide groove in the wire guide block, which is relatively expensive.

There are also known wire guides, which are composed of two halves, each of these halves is screwed separately with a screw to the receptacle. For the purpose of receiving the screw, a threaded insert is soldered into the respective wire guide half. When soldering such threaded inserts, however, there is an unfavorable stress distortion in the wire guide due to the heat generated, which is undesirable. In addition, the thread insert can be pulled out of its bore if the screw is tightened too much or if a screw that is too long is used, which makes the wire guide useless. The fixation by means of only one screw per wire guide half causes an optimal clamping force can not be applied.

Proceeding from this, the present invention seeks to provide a wire guide in which the disadvantages mentioned are largely eliminated and in particular has no more threaded inserts.

According to the invention this object is achieved in a wire guide of the type mentioned in that the molding guide body is positively anchored to the wire guide block on the side facing the side and the guide groove, which clamped on the side of the recording ago attacking him fastener against the recording and to this is attached.

In the wire guide according to the invention the attachment of special threaded inserts is no longer necessary and it has the advantage that it clamped by means of only a central clamping fixture, namely on the form-fitting anchored in her molding, from the side of the receptacle via suitable fasteners against the recording and can be attached to this. This is a central, d. H. at the height of the guide groove, successful attachment possible, since due to the laterally between the guide and the recording lying frictional anchoring of the molding and acting on the side of the recording attachment means an interference between the fastening means and the guide groove is easily avoided. If the wire guide according to the invention formed as consisting of two wire guide halves, the additional advantage that nevertheless a simultaneous attachment of both halves of the receptacle is possible by means of only a single molded body, which increases the assembly and manufacturing security, the attachment overall relatively quickly and Precise can be done and also the wire guide even better, d. H. with even greater forces, with the recording can be braced. So there is the possibility to apply optimal clamping forces quickly. The assembly of the wire guide according to the invention on the recording can be carried out particularly quickly and with little effort compared to previously known solutions.

In the wire guide according to the invention can be used as fastening means all suitable fasteners. Preferably, however, at least one, but more preferably two, are inserted through the receiving of their wire guide block opposite side of this inserted through fastening screw (s).

A preferred embodiment of the wire guide according to the invention also consists in that the shaped body is received in a formed in the wire guide block shape receptacle, which, particularly preferably, as a running in the direction of the guide groove and is formed to the side of the receptacle open mold groove. Other suitable embodiments of the shape recording are equally conceivable. If the mold holder is formed as a shaping groove, then this is preferably formed with a, seen substantially perpendicular to the guide groove, a substantially T-shaped cross-section. This forms a geometrically simple, easy to produce and extremely effective form of a shaping groove, in which a suitable molding can be anchored easily form-fitting manner.

In this case, the mold groove may be formed so that it extends over the entire length of the wire guide block, which allows easy Einfädelbarkeit the form-fitting to be anchored in its molding of one of the two end surfaces of the wire guide block ago.

Preferably, each fastening screw used as a fastening means in the wire guide according to the invention is supported by its screw head via a support plate interposed between it and the receptacle on the side of the receptacle facing away from the wire guide block. This represents a simple, yet very effective Abstützmöglichkeit.

Advantageously, the wire guide block according to the invention can also be designed so that it is divided at the level of the center of the guide groove in a plane perpendicular to the latter and thus consists of two wire guide block halves, in each of which half of the guide (and half of the Wire guide block molded mold holder or Formnut) is formed. In this embodiment, the mold groove can also advantageously extend over only a portion of the total length of the wire guide block, preferably being open for receiving first portion of the mold groove, seen in the direction of the guide over a smaller length than the length of the adjoining him Further, located in the interior of the wire guide block, extending the crosspiece of the T-shaped cross section of the forming groove forming second portion of the mold groove. In this case, the form-fitting to be anchored in the form-fitting molded body can be easily introduced by first inserted into one of the two wire guide body halves and thereafter the second half is slipped over.

In the case of the wire guide according to the invention, the shaped body can be designed in any shape that is suitably adapted for a positive anchoring in the forming groove or the shaped recess. However, it is particularly preferably designed as a sliding block with two sections, the first section being received in the first section of the forming groove towards the side of the receptacle, while the second section of the molded section adjoining it being accommodated in the second section of the forming slot and in its Longitudinal extent and / or its perpendicular thereto extending width is greater than the associated longitudinal extent or width of the first portion of the molding. Such a molded body can advantageously be used equally both in a continuous shape groove, as well as in a trained only over a portion of the total length of the wire guide block training the shape recording (split wire guide block halves) and in turn provides a relatively simple and producible with little effort Form dar.

Fig. 1

eine perspektivische Prinzipdarstellung einer erfindungsgemäßen, an eine Aufnahme angebauten Drahtführung;

Fig. 2

einen Schnitt durch die Drahtführungsanordnung gemäß Fig. 1 gemäß Schnittlage und Schnittrichtung entsprechend I-I aus Fig. 1;

Fig. 3

eine perspektivische vergrößerte Darstellung eines Formkörpers für eine erfindungsgemäße Drahtführung;

Fig. 4

eine perspektivische Seitendarstellung eines Drahtführungsblockes einer erfindungsgemäßen Drahtführungseinrichtung mit formschlüssig darin verankertem Formkörper gemäß Fig. 3;

Fig.5

eine der Fig. 1 entsprechende perspektivische Prinzipdarstellung einer erfindungsgemäßen Drahtführung mit geteiltem Drahtführungsblock;

Fig. 6

eine der Schnittdarstellung von Fig. 2 entsprechende Schnittdarstellung durch die Anordnung aus Fig. 5;

Fig.7

eine prinzipielle Perspektivdarstellung der unteren Hälfte eines erfindungsgemäßen, geteilten Drahtführungsblockes mit darin ausgebildeter (hälftiger) Formausnehmung für einen Formkörper gemäß Fig. 3 und

Fig. 8

eine der Darstellung der Fig. 4 entsprechende prinzipielle Perspektivdarstellung des Drahtführungsblockes bei einer erfindungsgemäßen Drahtführung entsprechend Fig. 5 mit formschlüssig darin verankertem Formkörper (im nicht angebauten Zustand).

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

Fig. 1

a perspective schematic diagram of an inventive attached to a recording wire guide;

Fig. 2

a section through the wire guide assembly of Figure 1 according to cutting position and cutting direction according to II of Fig. 1.

Fig. 3

a perspective enlarged view of a shaped body for a wire guide according to the invention;

Fig. 4

a perspective side view of a wire guide block of a wire guide device according to the invention with form-fitting anchored therein molded body according to FIG. 3;

Figure 5

a corresponding perspective view of a wire guide according to the invention with a divided wire guide block;

Fig. 6

a sectional view corresponding to the sectional view of Figure 2 through the arrangement of Fig. 5.

Figure 7

a basic perspective view of the lower half of a split wire guide block according to the invention with formed therein (half) mold cavity for a shaped body according to FIG. 3 and

Fig. 8

4 shows a schematic perspective view of the wire guide block in a wire guide according to the invention corresponding to FIG. 5 with a molded body anchored therein in a form-fitting manner (in the unassembled state).

In the illustrated in the figures, different embodiments for a wire guide the same reference numerals are used in all figures for the same parts.

FIGS. 1 to 4 show a first embodiment of a wire guide and in FIGS. 5 to 8 different embodiments of a wire guide.

First, reference is made to the first embodiment of an undivided wire guide shown in Figures 1 to 4:

In Fig. 1, a wire guide 1 is shown in a perspective view obliquely from the top front, which has a receptacle 2 to which a wire guide block 3 is fixed, which forms a guide groove 4 for a (not shown) wire. In the illustrated embodiment, as viewed in a right-to-left direction in the figure, the wire guide block 3 is disposed on the right side of the receptacle 2 (or the part of the receptacle 2 serving to fix the wire guide block 3).

The wire guide 1 is part of a (not shown) spring coiling machine and comprises an undivided wire guide block 3, as shown in an enlarged perspective view in Fig. 4 in detail.

As can be seen from FIGS. 1 and 4, a receiving receptacle 2 in the form of a mold groove 5 is mounted on the receptacle 2 side facing the wire guide block 3, which, in a sectional plane perpendicular to the longitudinal direction of the wire guide block 3 and seen perpendicular to Drahtführungsnut 4, has a substantially T-shaped groove cross-section.

In the mold groove 5, a molded body 6 is anchored positively, which is shown in an enlarged detail view in Fig. 3 in detail.

In this case, the molded body 6 consists of two mold sections, namely a first, smaller mold section 6.1, which in the installed state in a section 5.1 of the mold groove 5, which forms the central web of the T-shaped cross section thereof and is open for receiving 2, lies (see 4 shows the state of the molded body 6 installed in the mold groove 5, the hidden edges of the mold groove 5 and of the inner part of the molded body 6 being shown in dashed lines).

The subsequent to the section 6.1 larger section 6.2 of the molded body 6 projects in the installed state in an inner section 5.2 of the mold groove 5, which is the crosspiece of the T-shaped cross section of the mold groove 5 (as can be seen from Fig. 4). This (larger) section 6.2 of the molded body 6 has a length L 'and (perpendicular to the longitudinal extent of the forming groove 5) has a width B , which, as FIG. 3 shows, is significantly greater than the width b of the smaller section 6.2 (and this on both sides, ie in the illustration of the figures: upwards and downwards, surmounted, as can be seen in particular from FIG. 4 and the enlarged sectional view of FIG. 2 in detail, the latter corresponding to the cutting position shown in FIG. 1 is indicated by II).

The molded body 6 is inserted from one of the two lateral end surfaces of the wire guide block 3 in the mold groove 5 until it reaches the desired position for the attachment, which corresponds to the position of Fig. 4. In this case, the width b of the smaller section 6.1 of the shaped body 6 is just as large as the corresponding width b of the section 5.1 of the forming groove 5, while the overall width B of the larger section 6.2 of the shaped body 6 is just as large as the total width B of the second section 5.2 of the forming groove 5 is chosen (of course with such a tolerance that a good positive insertion without difficulty is possible).

The (measured transverse to the longitudinal extent of the forming groove 5) depth t of the first section 6.1 of the molded body 6 is just as large as the corresponding depth t of the corresponding receptacle 2 towards the open groove portion 5.1 of the forming groove 5 selected (or slightly smaller), while the depth T of the larger mold section 6.2 of the shaped body 6 is the same as the depth T of the second section 5.2 of the mold groove 5 (also here: preferably somewhat smaller, so that a slight insertion of the shaped body 6 into the mold groove 5 is ensured).

On the receiving 2 facing side of the smaller mold section 6.1 of the molding 6, as shown in FIG. 3, in this two threaded holes 9 are mounted in the attachment of the wire guide block 3 on the receptacle 2 of the wire guide block 3 side facing away (like Fig. 1 shows) two fastening screws 7 (see sectional view of Fig. 2) are screwed. The screw heads 7 'of the two fastening screws 7 are based on a between them and the facing side of the support 2 intermediate support plate 8, protrude through an opening 2 mounted in the receptacle 11 through (see Figs. 1 and 2) and are with their passed through each end screwed into one of the threaded holes 9 in the molding 6. By the screwing action of the fastening screws 7, the above and below the groove portion 5.1 of the forming groove 5 attached to the wire guide block 3 end surface 13 is pressed in each case against a corresponding contact surface 14 on the receptacle 2 and with a desired pressing force of this strained against. The clamping force is also transmitted to the support 2 on the other side of the receptacle 2 via the heads 7 'of the fastening screws 7 and the intermediate support plate 8.

As can be clearly seen from Figs. 1, 2 and 4, the forming groove 5 is formed in the wire guide block 3 so that in principle the cross-sectional center line M of its T-shaped cross section passes through the center of the guide groove 4, so centrally at the same height as this is located. In this case, the forming groove 5 is arranged in the wire guide block 3 between the guide groove 4 and the support 2 and forms on the positively received in her form body 3 a central clamping fixture on the receptacle 2. At the wire guide block 3 attaching special threaded inserts is no longer necessary. The still used for the attachment two threaded holes 9 are located in the mold body 6 and can be prepared in its manufacture and completely separate from the production of the wire guide block 3, so that even with their attachment in the molding 6 no effect in terms of production or exact Shape of the wire guide block 3 occur.

In Fig. 5 to 8, another embodiment for a wire guide 1 is now shown, which will be discussed below.

The wire guide 1 of FIGS. 5 to 8 differs from that of FIGS. 1 to 4 essentially in that here a split wire guide block 3 is used. As particularly shown in the enlarged perspective view of Fig. 8, in this embodiment, the wire guide block 3 at the level of the center of the guide groove 4 in a plane perpendicular to this plane E is divided into two halves 3.1 and 3.2.

FIG. 7 shows the half 3.2 (in FIG. 8: below). As can be clearly seen, lies in this half, the lower half of the guide groove 4 and also the lower half of the mold groove 5, which has a different shape than that of FIGS. 1 to 4.

As shown in FIG. 7, in the embodiment of FIGS. 5 to 8, the shaping groove 5 no longer extends over the entire length L of the wire guide block 3, but only over a partial section thereof. Here, as FIG. 7 likewise shows, the first groove section 5.1, which is open towards the receptacle 2, is designed with a shorter length L ₂ than the length L _{1 of} the adjoining second groove section 5.2 lying further inside the wire guide block 3. This projects beyond, seen in the longitudinal direction of the wire guide block 3, the first groove portion 5.1 on both sides something, the lower half 3.2 of the wire guide block 3, which is shown in Fig. 7, the first groove portion 5.1 only in its half width b / 2 and the second Groove section 5.2 only in its half width B / 2 shows (as in the upper half 3.1 of the wire guide block 3 is a mirror image of the same shape of the mold cavity 5, so that in the assembled state of the halves 3.1 and 3.2, as he z 5 and 8, only the mold cavity 5 in its overall size results).

Also in the mold groove or mold recess 5 of the wire guide block 3, which consists of the two halves 3.1 and 3.2 is used as a shaped body of the mold body 6 shown in FIG. 3, as well as in the mold groove 5 of the embodiment of Figures 1 to 4.

Fig. 8 shows a perspective view of the assembled halves 3.1 and 3.2 of the wire guide block 3 with inserted molded body 6 (wherein the concealed in the drawing groove edges and edges of the molded body 6 are shown in dashed lines inside the mold groove 5).

As can be seen from the sectional view of FIG. 2, also enlarged sectional view of FIG. 6, the tension of the two halves 3.1 and 3.2 of the split wire guide block 3 against the receptacle 2 also only about the centrally located and attracted by the mounting screws 7 Shaped body 6 instead. Otherwise, the structural conditions are the same as those in the first embodiment of FIGS. 1 to 4.

When using the wire guide shown the wire (as not shown in the figures) from a reel, is driven by a number of feed rollers and conveyed via an unillustrated straightening unit in the wire guide 1 shown in FIG. The task of this wire guide is to guide the wire accurately in the work space of the wire processing machine, where it is wound as to springs o. Ä. B. such a wind process, the wire at the front edge of the wire guide 1, at the mouth opening of the guide groove 4, sheared off by a (also not shown in the figures) cutting unit.

Claims (11)

1. Wire guide (1) for a wire processing machine, in particular a spring manufacturing machine, for guiding a supplied wire to wire processing tools, comprising a receiving part (2), to which a wire guide block (3) is mounted which forms a guiding groove (4) for the wire,
   characterized in that
   a forming body is anchored in a form-locking manner on the wire guide block (3), on the side of the latter facing the receiving part (2) and laterally of the guiding groove (4), which forming body is biased towards the receiving part (2) and mounted thereto by mounting means (7) engaging the forming body on the receiving part side.
2. Wire guide (1) according to claim 1, characterized in that the mounting means comprise at least one, but preferably two mounting screw(s) (7) passed through the receiving part (2) from its side located opposite the wire guide block (3).
3. Wire guide (1) according to claim 1 or 2, characterized in that the forming body (6) is received in a form receiving part (5) provided in the wire guide block (3).
4. Wire guide (1) according to claim 3, characterized in that the form receiving part is provided as a forming groove (5) extending in the direction of the guiding groove (4) and open towards the side of the receiving part (2).
5. Wire guide (1) according to claim 4, characterized in that the forming groove (5), when viewed perpendicular to the guide groove (4), has a substantially T-shaped cross-section.
6. Wire guide (1) according to claim 4 or 5, characterized in that the forming groove (5) extends over the entire length (L) of the wire guide block (3).
7. Wire guide (1) according to any one of claims 2 to 6, characterized in that each mounting screw (7) is supported on the receiving part (2) by its screw head (7') via an intermediate supporting plate (8).
8. Wire guide (1) according to any one of claims 1 to 7, characterized in that the wire guide block (3) is divided at the level of the center of the guiding groove (4) in a plane (E) which is located perpendicular to the latter.
9. Wire guide (1) according to claim 8 and claim 4, characterized in that the forming groove (5) extends only over a partial section (L₁; L₂) of the total length (L) of the wire guide block (3).
10. Wire guide (1) according to claim 9, characterized in that the portion (5.1) of the forming groove (5), which portion is open towards the receiving part (2), extends, when viewed in the direction of the guiding groove (4), over a length (L₂) less than the length (L₁) of the contiguous second region (5.2) of the forming groove (5), forming the crossbar of the T-shaped cross-section of the forming groove (5).
11. Wire guide (1) according to any one of claims 5 to 10, characterized in that the forming body is provided as a groove stone (6) comprising two portions (6.1, 6.2), wherein its first portion (6.1) is received in the portion (5.1) of the forming groove (5) being the first portion on the side of the receiving part (2), while the second portion (6.2) of the groove stone (6) contiguous thereto is received in the second portion (5.2) of the forming groove (5) and has a longitudinal extent (L') and/or a width (B) perpendicular thereto that is greater than the longitudinal extent (L₂) or the width (b) of the first portion (5.1) of the forming body (6).

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