EP1060041B1 - Spring winding automatic machine - Google Patents

Abstract

Spring coiling machine with a drive, a wire guide, a cutter mechanism and a coiler mechanism, in which the drive is adapted for optionally driving one or other of at least two wires sitting in the wire guide at the same time.

Description

The present invention relates to a spring winding machine according to the Preamble of independent claim 1, and a method for Switch between at least two in an automatic spring coiler different wires during operation.

Such automatic spring winders are in different embodiments known. They are used to manufacture essentially spiral wire springs.

A disadvantage of all known embodiments is that an adaptation to different wire sizes is only possible with great effort. basics Components of known automatic spring winders are based on the strength of the processing wire designed and need to process others Wire sizes are exchanged. This is particularly true for the drive and the wire guide too. The machine must then be reset. The entire process takes several hours. A quick one Moving the machine to be able to react flexibly is not possible. The components to be replaced must also be properly stored to avoid damage and soiling. The Warehousing is expensive.

US 5,131,251 shows such a spring winding machine with a Drive, several wire guides, a cutting device and one Winch device in which the different wires in the several spaced apart wire guides. When changing the Wire material, the entire winch device must be moved and be positioned in front of each wire guide, resulting in the above disadvantages described leads.

The object of the present invention is therefore an automatic spring coiler of the type mentioned in such a way that in a very short time a Switching to other wire sizes is possible. It should also be a appropriate procedures are provided.

According to the invention, this object is achieved through the technical teaching of independent claims solved.

The spring winding machine according to the invention has a drive with which at least two different wires are optionally driven can, these at least two different wires in at the same time the wire guide are included. Both the drive and the Wire guides can pick up and line a number of wires at the same time process, but only one wire should be conveyed.

Complicated replacement of components and readjusting the Vending machines are completely eliminated. Switching between at least two Wiring takes place in a short time.

The wire guide preferably has a guide, in which for receiving of the wires holes or opposite one another, open on one side Grooves are formed in a common chamber with a Outlet opening. The delivery point of the wire guide to the Cutting device and winch device is therefore always constant and does not have to be changed.

An additional one can be used to adapt to very different wire sizes Adapters may be provided. This has different through holes on. These point on the side facing the guide Through holes an enlarged diameter at which the Guide facing away from a scaled down. They are preferably two Sections assembled, one of which is approximately frustoconical, the other is roughly cylindrical in shape. The adapter is opposite the guide rotatable or slidable around the different through holes to be able to combine with the tour.

A common drive can be provided for all wires. This consists preferably of opposite pairs of rollers, which with a Number of grooves are provided. The number of grooves corresponds to the number of the possible wires to be processed. The rollers are against each other slidable parallel to its axis of rotation. The groove spacing on the Rollers are different here. The through the slot openings in the opposing rollers forming receiving spaces for the wires to be transported can thus be adapted to the wire circumference. It can also have more than two wires, e.g. three or four wires are fed become. When feeding with 4 wires, each pair of rollers feeds two Wires.

The wires are received in grooves in a roller. The grooves on the Rollers are arranged so that only in each position of the rollers a groove of the first roller is aligned with a groove of the second roller. It will therefore only one wire driven at a time. When the rollers move other grooves are aligned with each other; it will then the wire driven, which is received in this pair of grooves.

The radial and axial distance between the rollers is preferably adjustable.

In a further embodiment it is provided that the rollers are not assigned to each other and opening and closing if necessary Form groove spaces. It is provided here that only one in each pair of rollers only wire is picked up and fed if necessary. All Roller pairs are aimed at a common union center. The if necessary, supply takes place here via the respective drive of the Roller pairs that are controllable. It is a CNC controlled Drive of the respective pair of rollers, the drive ensuring that always driven only one pair of rollers and the Darht recorded between them to the union center.

Beide Drähte sind in einer Führung mit einer gemeinsamen Austrittsöffnung aufgenommen. Nachdem der erste Draht für die gewünschte Dauer bearbeitet worden ist, wird ler abgeschnitten und zurückgezogen. Der erste Draht wird soweit zurückgezogen, daß der zweite Draht durch die gemeinsame Austrittsöffnung gefördert werden kann.

Based on the first-mentioned exemplary embodiment, the method according to the invention provides that a first wire is processed first, while the second or further wires are already accommodated in the guide tube. For simplicity, the following embodiment is described using two wires as follows:

Both wires are received in a guide with a common outlet opening. After the first wire has been processed for the desired duration, it is cut and pulled back. The first wire is withdrawn to the extent that the second wire can be conveyed through the common outlet opening.

Only one of the wires is preferably always driven. The drive will switched accordingly. While pulling back the wire can an adaptation of other components of the machine, especially the Cutting device and the winch device on the new wire. This adjustment is preferably carried out automatically.

The wire guide can have an adapter in addition to the guide, so that the size of the discharge opening of the wire guide can be changed. This will the processing of wires of different dimensions without Changes to the machine possible.

The subject matter of the present invention does not only result from the subject of the individual claims, but also from the combination of the individual claims among themselves.

All disclosed in the file, including the summary Information and features, especially those shown in the drawings spatial education are claimed as essential to the invention, insofar as they individually or in combination are new compared to the prior art.

In the following the invention is based on several ways of execution illustrative drawings explained in more detail. Here go from the Drawings and their description further features essential to the invention and advantages of the invention.

Figur 1:

eine schematische Darstellung eines Federwindeautomaten;

Figur 2:

eine vergrößerte Darstellung einer Führung im Schnitt;

Figur 3:

eine schematische Darstellung einer anderen Ausführungsform einer Führung;

Figur 4:

einen Ausschnitt aus der Führung der Figur 3 zusammen mit einem Adapter;

Figur 5:

einen Ausschnitt aus dem Antrieb des Federwindeautomaten; und

Figur 6:

eine Ansicht wie Figur 5 mit umgeschaltetem Antrieb.

Figur 7:

eine Rückansicht eine Führung für vier Drähte

It shows:

Figure 1:

a schematic representation of an automatic spring coiler;

Figure 2:

an enlarged view of a guide in section;

Figure 3:

a schematic representation of another embodiment of a guide;

Figure 4:

a section of the guide of Figure 3 together with an adapter;

Figure 5:

a section of the drive of the automatic spring coiler; and

Figure 6:

a view like Figure 5 with the drive switched.

Figure 7:

a rear view a guide for four wires

In Fig. 1, an automatic spring coiler is shown schematically. The essential Modules are drive A, wire guide B, cutting device C and Winch device D. Devices C and D can also be used known automatic spring winders quickly to different wire sizes to adjust. Modules A and B are problematic

The drive A consists essentially of two rollers 21, 22 which in Direction of arrow 23, 24 and in the opposite direction can be driven. The The roller gap is displaced by a displacement of at least one of the rollers 21, 22 Arrow direction 26, 27 adjustable. Be through the nip According to the invention, several wires 8, 9 of different diameters are guided and fed to the wire guide B in the direction of arrow 7.

In the exemplary embodiment shown, the wire guide B comprises a guide 1 or 10, which is coupled to an adapter 14. The adapter 14 can also omitted. The wire guide B must the wire 8, 9 in a highly precisely defined Guide the layer through the cutting device C into the winch device D.

The cutting device C has two knives in the application example shown 25, which are mutually adjustable in the direction of arrow 26, 27. Not closer shown winch device D has a device with which the Diameter and the pitch of the spring to be coiled are specified can.

Fig. 2 shows an embodiment of a guide 1. The guide 1 has Bores or grooves 2, 3 in a common chamber 5 with a Outlet opening 5 open. The grooves 2, 3 are at an angle 6 to each other, which depends on the actual circumstances. In the A wire 8 is received in slot 2 and a wire 9 in slot 3. It is clear recognizable that the grooves 2, 3 and the wires 8, 9 different Have dimensions or diameters.

The change from wire 8 to wire 9 takes place as follows: First, the Wire 8 is cut outside the guide 1 by the cutting device C. become. The wire 8 is then removed from the chamber 4 withdrawn that the wire 9 can be fed in the direction of arrow 7. In The short amount of time that is required for these movements can Cutting device C and the winch device D on the new wire 9 be adjusted. The change from wire 9 to wire 8 takes place accordingly.

In the drawing, the chamber 4 of the guide 1 is significantly enlarged shown. The distances to be covered are very small in reality, the time required is a few hundredths of a second. So it's one rapid change of the wire 8 or 9 to be processed possible. In practice The wire can be changed after each wound spring without great losses become.

Fig. 3 shows schematically another guide 10 with five grooves 11 for Recording and guiding different wires is provided. In this The embodiment is the guide 10 with a tip 12 and a shoulder 13 Mistake. The chamber 4 preferably projects into this tip 12 and the attachment 13 into it.

The size of the outlet opening 5 determines the maximum permissible Wire diameter. However, the outlet opening 5 must not be essential be larger than the wire to be processed because it is clean and reliable Leadership is otherwise no longer guaranteed. To be very different To process wire diameter, the guide 1 or 10 with a Adapter 14 can be combined, which is shown in Fig. 4.

This adapter 14 has a plurality of through holes, each of which is divided into two. A first, essentially conical section 15 or 17 is adapted to the outlet opening 5. This is followed by an essentially cylindrical section 16 or 18. The sections 16, 18 have different diameters to adapt to different wires 8, 9.
For tuning purposes, the adapter 14 can be displaceable in the direction of arrow 19 and in the opposite direction. Alternatively, the adapter 14 can be rotated in the direction of the arrow 20. The movement of the adapter 14 takes place during the withdrawal of the wire 8 or 9 to be changed, so that there is no loss of time.

A drive variant for two wires is shown in FIGS. 5 and 6. each the rollers 21, 22 have two mutually spaced grooves 28 and 29, respectively. The distance between the grooves 28 of the roller 21 is greater than the distance between the grooves 29 of the roller 22. This roller 22 also has a projection 30 on which the two grooves 29 are formed. The Rollers 21, 22 are mutually displaceable in the direction of arrow 19. It will preferred when the upper roller 21 is stationary and the lower roller 22 is postponed; however, this is not absolutely necessary.

In the position shown in Fig. 5, the wire 8 is fed. The each grooves 28, 29 on the left of the rollers 21, 22 are aligned. The second wire 9 is in the right groove 28 of the upper roller 21, but not in contact with the lower roller 22. For switching, the two rollers 21, 22 briefly driven in the opposite direction to the conveying direction, around the wire 8 withdraw from chamber 5. Then the rollers 21, 22 stopped. Then the lower roller 22 moves to the right in the direction of arrow 19 emotional. The left wire 8 remains in the groove 28 of the upper roller 21, while the lower roller 22 moves away. It runs at about the same time Projection 30 on the wire 9, pushes it up slightly and pushes itself under the wire 9. In the end position shown in Fig. 6, the right grooves 28, 29. The wire 9 is between the rollers 21, 22 recorded and promoted, the wire 8 is.

If necessary, the roller 21 during the lateral movement of the Roller 22 slightly raised in the direction of arrow 26 and then lowered again become.

In a corresponding manner, several wires 8, 9 of two can also be used mutually movable rollers 21, 22 are promoted.

The automatic spring coiler according to the invention can be in rapid succession between change different wires and thus the flexibility essential increase.

In the exemplary embodiment according to FIG. 7, the conveyance of four wires is described. All of the above descriptions and exemplary embodiments, as described with reference to the conveyance of two wires, apply in an analogous manner.
7 shows a further guide 31, in which differently calibrated bores 2, 3, 32, 33 are arranged for guiding different wire diameters. The holes do not necessarily have to be the same in parts, they can be different.
All bores 2, 3, 32, 33 are directed towards the common, approximately centrally arranged outlet opening 34.
When guiding three wires, one of the holes 2, 3, 32, 33 simply remains empty.
In the exemplary embodiment according to FIGS. 1-7, the fork head 35 which delimits the chamber 4 to the rear is so large that all the wires have space in the chamber 4.
In the second embodiment with CNC-driven pairs of rollers, the wire lying in the chamber 4, which is to be cut off and no longer to be conveyed, is withdrawn to such an extent that it comes to rest behind the fork head 35 and no longer blocks the chamber. A further wire can then be introduced into the chamber thus cleared.

The invention is therefore not limited to the fact that all of them are always in the chamber 4 wires to be fed in parallel next to each other. It can also be a or more wires are withdrawn from the chamber to the chamber free. It can therefore drive higher feed speeds because the adapter 14 can be omitted and the wire with less play is guided by the guide 1, 31.

drawing Legend

1

guide

2

Hole / slot

3

Hole / slot

4

chamber

5

outlet opening

6

angle

7

arrow

8th

wire

9

wire

10

guide

11

Hole / slot

12

top

13

approach

14

adapter

15

section

16

section

17

section

18

section

19

arrow

20

arrow

21

roller

22

roller

23

arrow

24

arrow

25

knife

26

arrow

27

arrow

28

groove

29

groove

30

head Start

31

guide

32

drilling

33

drilling

34

outlet opening

35

clevis

A

drive

B

wire guide

C

cutter

D

winding device

Claims (15)

1. Spring coiling machine with a drive (A), a wire guide (B), a cutter mechanism (C) and a coiler mechanism (D), characterized in that the drive (A) is adapted for optionally driving one or other of at least two wires (8, 9) that are sitting in the wire guide (B) at the same time.
2. Spring coiling machine according to Claim 1, characterized in that the wire guide (B) has a guide block (1, 10, 31) in which bores or grooves (2, 3, 11, 32, 33) to receive the wires (8, 9) are formed and lead into a common chamber (4) with an outlet opening (5, 34).
3. Spring coiling machine according to Claim 1 or 2, characterized in that the wire guide (B) has an adapter (14) provided with different bores (15, 16; 17, 18).
4. Spring coiling machine according to one of Claims 2 or 3, characterized in that the bores (15, 16; 17, 18) on the side facing towards the guide block (1, 10; 31) have a larger diameter which essentially corresponds to that of the outlet opening (5; 34) of the chamber (4).
5. Spring coiling machine according to Claim 4, characterized in that the bores (15, 16; 17, 18) are formed in two sections and have a section approximately in the form of a truncated cone (15; 17) and an adjoining, essentially cylindrical section (16; 18).
6. Spring coiling machine according to one of Claims 3 through 5, characterized in that the adapter (14) is rotatable or slidable with respect to the guide block (1, 10; 31).
7. Spring coiling machine according to one of Claims 1 through 6, characterized in that the drive (A) has two rollers (21, 22) which are provided with a number of grooves (28, 29) and are displaceable in relation to one another in a direction parallel with their rotational axis.
8. Spring coiling machine according to Claim 7, characterized in that the distance between the grooves (28) of the first roller (21) is not the same as the distance between the grooves (29) of the second roller (22).
9. Spring coiling machine according to Claims 7 or 8, characterized in that the distance between the rollers (21, 22) is adjustable.
10. Method for a spring coiling machine with a drive (A) for switching between different wires (8, 9), a wire guide (B), a cutting mechanism (C) and a coiler mechanism (D) with the following steps:

    presenting at least two wires (8, 9) with a dedicated drive (21, 22),

    introducing these wires (8, 9) into a guide block (1, 10, 31) with a common outlet opening (5, 34) for all wires (8, 9),

    feeding the first wire (8) through the guide block (1, 10) and coiling this wire (8),

    severing this wire (8) and retracting the wire (8) inside the guide block (1, 10) sufficiently to allow a second wire (9) to be advanced through the outlet opening (5) of the guide block (1, 10), and

    feeding the second wire (9) through the guide block (1, 10) and coiling this wire.
11. Method according to claim 10, wherein only one of the wires (8, 9) is being driven at any given time.
12. Method according to Claim 10 or 11, wherein during retraction of the corresponding wire (8, 9) adaption of the cutter meachnism (C) and coiler mechanism (D) to the new wire (9, 8) used is effected.
13. Method according to Claim 12, wherein the adaption is made automatically.
14. Method according to one of Claims 10 through 13, characterized in that the size of the delivery opening (16, 18) of the wire guide (B) is variable.
15. Method according to one of Claims 10 through 14, characterized in that a single wire only is held in a roller gap of a pair of rollers and the rollers of the pair of rollers are drivable synchronously.

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