DE8106607U1 - Device for welding bolts and the like to a workpiece - Google Patents

Description

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■ ettermann 7586/01 '··' ·· '*'

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Device for welding bolts and the like to a workpiece

I) Ie invention relates to a Vorridhtung for WereehujeiOen Of bolts and the like with a workpiece by means of tine stud welding machine that works at least semi-automatically, whereby the bolts are fed separately and in the correct position from the outside to a bolt holder by machine, the Stud holder held by stud welder in welding position and then the stud is welded on (after which the stud gun is used to attach the stud holder Picking up another bolt in the takeover position »returns.

burch the DE-GM 80 06 621 a device is known, Here works according to the method described at the beginning.

The bolts are not fed through the fechiiiBkopf to the bolt holder, but the Mats are inserted from the outside into the bolt holder inserted. For the purpose of automatic Takeover is the well-known nail gun with a Transfer station equipped for the bolts, with the (transfer station the bolts by means of a supply hose fed with the ignition tip ahead.

Bettermann 75B6 / B1

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then the transfer station and the welding head of the Bolt-bending devices are swiveled towards each other, so that by for example pneumatic longitudinal displacement of the bolt holder in the direction of the transfer station held bolt the bolt is inserted and clamped in the correct position in the bolt holder. This kind the handover has the disadvantage that the bolt, for example, does not hang down with a vibrator The shaft and the upturned ignition tip can be fed, but the bolts in the opposite orientation in must be positioned at the transfer point, the Bolts are usually provided with a circumferential flange near the ignition tip, a so-fed one tilts Bolts in a guide and is therefore relatively difficult to introduce into the stud chuck. Further is for the transfer of the bolts from the feeding device, for example a hose, the interconnection of a separate transfer station on the stud chuck necessary. This transfer station is also on the SchuelQ level, so that it includes the delivery van Bolt obstructed to provided workpieces. .

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This is a major disadvantage of this known procedure or device is that in order to make different bolts more different To be able to weld dimensions, several welding devices arranged in a row according to the prior art must be.

Proceeding from this, the invention is based on the object of creating a device with the most varied of bolts Sizes and dimensions can be welded continuously changing. The field of application extends according to the task for example on NC-controlled positioning devices in the manufacture of electrical devices or the like.

To solve this problem, it is proposed that the stud welding device several stud chucks can be assigned, which alternatively with the stud welding device according to a selectable call-up scheme are connected, with the stud holder each equipped with a stud and connected to the stud welding device after the welding process and after reaching the takeover position is separated from the stud welding device and held in this position, furthermore this process sequence is controlled electrically or electronically.

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Bettermann 75Β6 / Β1

In dieae üJeise ee is possible to weld with a single bolt BolzenschuieiBgerSt completely unterschiedliGher DimenBiünierung continuously. That

Stud welding device takes according to the retrieval

In the echema, the predetermined holder and the pin inserted in it are displayed and the welding process is then carried out. The empty stud chuck is then returned to the takeover phase and separated from the stud welding cross so that the stud gun can then pick up the next stud chuck according to the call-up scheme. This mode of operation means a considerable reduction in the quantity of stud-lock devices that was previously required, or “a considerable shortening of the shooting time.
Another advantage is that the stud chuck for

Purpose of separation from the bolt chasing device into one

> ^: Holding device axitl are inserted, the equipment

I 'of the respective bolt halter with another bolt

takes place synchronously during insertion and the bolts can be taken over directly by the feeder.

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The advantage of this procedure is in particular in that the movement of the bolt lock device required to separate the bolt holder simultaneously to Equipping the respective stud holder with another one Bolt is used. That has a positive effect on the Working cycle of the procedure.

Furthermore, the invention is directed to a device for carrying out the method consisting of an electrical device BolzenschuieiBger§t with a swivel attached welding head, on which at least one stud holder releasably attached iet, which is controlled axially displaceable is, and a transfer station for the transfer of a Of the stud from a feeding device to the stud holder, Furniture of the stud holder can be aligned coaxially to the transfer part of the transfer station by pivoting the welding head lat.

According to the invention, this device is characterized in that jjass outside the swivel range of the welding head together Bolt holder on an arc of a circle, the center of which is in the Schwankini The center of the welding head is located, several transfer stations are arranged next to one another with the associated stud feed device, ri & 3 in the direction of the welding

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head in front of each transfer station, to the Suhweißkopf
implores, a holding device for a stud chuck
arranged let, each holding device wears a stud holder, and that the welding head is an alternative
axially to one of the stud chucks adjustable coupling part, tiielueiee can be coupled to one of the respective stud chucks provided in the holding device or from the respective unloaded into the
Haltvorriohtung used can be uncoupled.

It is particularly advantageous that when the welding head is arranged vertically below the welding head, the
Transfer stations along with holding devices and bolt feed device are arranged approximately vertically above the throwing head ee, these devices being within a swivel range of approximately on both sides Ί5
- starting from the perpendicular position - are held.

This makes it possible eB, the bolts .immediately from the feed device, for example the channel of a
V / ibratorB, whereby an intermediate transfer station can be dispensed with.

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75BG / 81

A preferred further development of the invention is included therein seen that the bolt feeder device from a die There is a vibrator that feeds bolts hanging and this, as a transfer station, has clamping jaws that hold the bolts release as soon as the transfer to the respective bolt ■ holder takes place lit «

It is also advantageous that the clamping jaws by means of of an actuator are guided into the release position and back.

One variant consists in using at least a pneumatic working cylinder at the transfer station held let, by means of which the clamping jaws can be pushed apart or retracted for the purpose of releasing the bolts are.

A preferred alternative is seen in the fact that

the stud holder is designed as an actuator, the

Clamping jaws can be spread by this against spring pressure.

In a further development it is provided that the clamping jaws form an insertion channel for the tip of the stud holder, the one in the direction of insertion of the bolt holder bus from an at least slightly larger radius than dss in particular

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conical introductory dee bolt holder calibrated except for the ftolzenradiue tapered so that the Hlettwnbaßken in the transfer position duföh the stud chuck spreading the courtship

In order to achieve a completely better positioning of the bolt in the bolt « holder to achieve let beneficial that in introductions in the direction of the stud holder behind the clamping jaws Pressure piece arranged iet against which the bolt warmer Picked up bolts can be pushed through the bolt holder after they have been released by the clamping jaws.

So that the positioning can be detected electrically, Let it be provided that the stud chuck can be connected to the pressure piece electrical cantacts are arranged.

There is another advantageous detail of the invention in that the stud chuck is held on the locking cap by means of automatically releasable clamping jaws.

In a further development it is proposed that the clamping jaws expandable by means of a pneumatic work cylinder Bind.

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A variant of this is that the Bolzenhalüer a In a corresponding conical recess of the booklet cap Unteckbaren conical cones and Hittala of one arranged coaxially to the recess in the die head Ausüierfere can be inserted detachably.

Worteilhaftfuieise is provided that the SchuieiBkopf fcittelB an electric stepper motor can be switched.

It is also advantageous for the workflow if the device is electronically controlled. Further details and exemplary embodiments of the invention are shown in the drawing and described in more detail below.
Eb shows:

Fig. I is a schematic representation of a device according to the invention Device in view;

Fio. 2 + 3 the fastening mechanism of a stud chuck on the appropriately trained shear head in schematic representation;

Fio k the sequence of movements of a simplified bolt ⁹ * BchujeiBvorrichtung in a schematic representation;

FIG. 5 shows a stud gun in the takeover position, ⁹ only one stud holder and one stud feeder being shown for the sake of clarity;

Fio. G the stud feed by means of a hose in the takeover position bitinn, B shown schematically;

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7 shows in detail a view of a vibrator feed;

Fig. B of the transfer part at the end of the vibrator channel van seen below;

9 shows a variant of the vibrator and transfer position in Opinion;

10 shows a further variant of the same part of the device in view.

The stud welder described below works according to the principle of the capacitor discharge method, but the invention is not limited to this method, but can also be used for drawn arc welding guns. In Fig. 1 the horizontally running welding life 1 B is indicated schematically, on which the workpieces, blanks and the like are guided under the welding device 2 and correctly positioned for the SchbieiBvargang. The shooting head 5 of the shooting gear 2 can be rotated about the pivot point k in the direction of the arrow 3, a stepper motor preferably being provided as the drive. The bolt feeder shown schematically in the figure is intended for stationary use. A coupling part is held on the welding head 5, which can be connected to a solder holder 7. The coupling part 6 is for example

Bettermann 75Β6 / Β1. '!'^# \ ^,! ".. '* \, ^: ,:,

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arranged to be adjustable relative to the welding cap 5 by means of a pneumatic cylinder in the direction of the arrow θ. Outside the swivel range of the welding head 5 Bsrnt beam holder 7, a number of transfer stations 9 are arranged on an arc of a circle whose center point coincides with the pivot point k of the welding cap 5, each of which also has a stud feed device 1D. Before each transfer tape 9 there is a holding device 11 for in each case one beam holder. 7 arranged fixed to the frame, in which each of the coupling part of the welding head 5 the corresponding beam holder 7 can be placed after appropriate positioning. The holding device is shown individually in Fig. 1, top right, this holding device 11 having pliers-like clamping jaws 12 which, on the one hand, enable the bolt holder 7 to be pushed in axially and, on the other hand, hold the inserted beam holder 7 sufficiently securely.

The operation of this apparatus shown 1st k strictly in simplified form in Fig.. The top figure in FIG. K shows the stud gun with the welding head 5 in readiness for welding, the stud holder 7 holding a beam 13 vertically downwards. For example, by pneumatic lifting of the bolt holder β 7 together with the bolt 13 to the pivoting level 1, the bolt 13 is pressed onto the pivoting level 1 and electrically

Bettermann 75Θ6 / Β1

verachuieiBt, for example in the KandenBatarentladungs-

principle. This is seen in the second figure above

f shown in principle. After welding the bolt

13 and the stud chuck 7 is withdrawn to the welding head 5 and in this retracted position around the rotation

point k is connected, namely in the position in which the stud holder 7 of the corresponding holding device 11, which is not shown in FIG. 1 for the sake of clarity, is inserted. For insertion into the holding device 11, the stud holder is again pushed up relative to the shear head 5. As soon as the stud holder is inserted into the aging device 11, the stud holder 7 is separated from the coupling part 6 and the coupling holder is withdrawn towards the welding head 5. The welding head 5 then swivels into the position in which it can receive another stud holder 7, which is equipped with a stud 13. The stud holder is picked up in the same way as the delivery process. Subsequently, the SchuielBkopf 5 echuienkt back into the weld-ready adhesive position. The individual positions are preferably approached in a processor-controlled manner.

The transfer stations 9, along with the holding devices 11 and the respective stud feeders, are preferred.

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Ring devices 1D arranged approximately vertically above the shooting head 5, this arrangement taking place within a swivel range υ on etuia on both sides U5 °, starting from the vertical position. The welding plane 1 is arranged perpendicularly below the welding head 5. This arrangement has the advantage that a vibrator with a vibrator channel can be arranged as the bolt feed device 1D, which vibrator leads into the upper transfer station 9. In this case the bolt is in a stable position, namely, by hanging down shaft, animal transfer station 9 is supplied which, without the bolt 13 to turn, this bolt 13 fOr holds the respective pin holders. 7 As a result, the welding plane 1 is completely free of any elements of the entire device. Variants of the bolt feed and special designs of the same are shown schematically in detail in FIGS. 5 to 9.

According to FIG. 5, there is a bolt feed device 10 from a vibrator with a bolt feed channel 1 <t. At the end of this channel 14 are a transfer station 9 two resiliently expandable clamping jaws 15 are provided, This can be seen in more detail in FIG. 7 is.

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The Balzen 13 are with the shaft hanging down promoted forward in the gutter 1fc, uiöbei that in the ßeiepiil round bolt with a circumferential flange 16 admit one, the eieh each on top of the Groove and the firing tip The bolt 13 protrudes freely upwards from the channel. The clamping jaws 15 are each at the end of a channel 1t »forming Btabee articulated and articulated by a spring 1B pressed together, eo that the jeuieila interfered Bolt held by the jaws 15 iat. over that The clamping jaws 12 have a receiving groove on the inside the flange 16 of the bolt 13 so that the Bolts in the clamping jaws held immovably in the axial direction. The jaws 15 are by means of an actuator that is still more closely followed is pushed into a position releasing the bolt 13 as soon as the corresponding bolt holder 7 has received the bolt 13 Has. In the embodiment according to FIGS. 7 + 8 the stud chuck 7 serves as an actuator for the self Swiveling movement of the clamping jaws 15, the clamping jaws 15, as can be seen in particular from FIG conical insertion channel 19 on their the stud holder

Bettermann 75Θ6 / Θ1 '··' ·· '' .. '* ··' '··' ·· <

have facing underside. This achieves that the stud holder 7 is centered in its feed movement for receiving the stud 13 in the insertion channel 19 is inserted and with increasing feed the Brings jaws 15 apart so that the bolt 13 is finally released. So that the bolt 13 as possible added up to its flange edge 16 υam bolt holder 7 uiird, there is a pressure piece above the clamping jaws 15 20 arranged, which on the feed channel 1Ί is attached. The printing block 20 has a slot for exposing the ignition tips of the supplied bolts 13 Mistake. The pressure piece 20 can additionally be provided with electrical contacts, which are connected by the bolt holder 7 pressed bolt 13 or its flange 16 are electrically connected, on the one hand, the proper transfer Can be detected via a display device and, on the other hand, electrical control functions via this contact are executable. For example, the opening of the clamping jaws 15 take place electrically or pneumatically, the opening process being started by making contact on the pressure piece 20 and is timed.

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FIG. 9 shows a variant in which the bolts 13 are guided with a square base plate, which forms the flange 16, and with a flat, upright web part. These pins are fed to the transfer station 9 via the pin guide channel 1Ί, the chins 1Ί being narrowed at the end so that the foremost pin 13 cannot be pushed out forwards provided, which can be displaced in the longitudinal direction of the channel 11 »by means of a working cylinder 21 fastened, for example, to the channel Ik. The displaceable clamping jaw 15 also has the corresponding counterpart of the other channel part with an undercut, behind which the flange 16, which is in the takeover position, can slide so that it is axially immovable. For the purpose of transfer, the stud holder 7, which is adapted to the web of the stud, is pushed onto the web of the stud 13. As soon as the stud is correctly clamped in the stud holder 7, the movable clamping jaw 15 is pushed into the piston rod of the working cylinder 21 in the Drawing shifted forward _f so that the gripped by the stud holder 7

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Bolt 13 is exposed and downward in the drawing tier transfer station 9 can be pushed out «The AuslOaung the working cylinder can through at the bottom the clamping jaws 15 provided electrical cantacts are triggered, which are closed by the salt holder 7 taerden as soon as this' reaches the correct takeover policy has «In this execution farm too, but half of the guide trough 1 <* bzbi. above the jaws 15 Printing block 20 be arranged with a corresponding shape and puncture.

Another example of the execution of the handover station is shown in Fig. 10, there the bolts 13 designed as flat connector pins or the like are. The bolts 13 are connected to one another via thin strips of material as long as they have not yet been removed from the roller holder 7 have been adopted. The material strip 22 is cut by a pneumatically operated knife 23, as soon as the stud holder 7 has grasped the corresponding stud in the correct position. The counter bearing for the knife 23 forms the knife-like clamping jaw 15, which after cutting through the strip of material 22, for example pneumatically, from the sliding path of the stud chuck together

Bettermann 7586 / B1

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Bolt is removable.

In Figure G, a further variant of the BalzenQberabe is shown. A hose is provided as the stud feed device 10, which is particularly advantageous for welding heads that are moved by hand or by robot, that is to say non-stationary welding devices. The transfer station 9 is arranged coaxially at the end of the hose and consists of clamping jaws 15, which can be expanded against the leaf springs 18, as well as other resilient locking plates Zk serving as an abutment for the flange 16 of the bolt 13, a spring ring 25 being provided for each spring. The bolt 13 conveyed through the hose 1Q is pressed with the shaft first through the locking plates Zk until the flange edge 16 is also held by the spring basin 15 while the locking plates Zk are temporarily springing open past the locking plates Zk. In this Bereltachaftstellung the stud holder 7 can be inserted from below between the clamping jaws 15, wherein it grips the Bolzenschet't clamping. The lower straight locking flaps of the locking plates Zk prevent the bolt from being pushed back into the feed channel. Once the Bolzeneeheft iet completely absorbed by stud holder 7 _f of the pin holder 7 is retracted and stored in a holding device. 11 Ughrendijeiaeen can

Bettermann 7586/81

Next bolt 13 In the ready position In the Transfer atation 9 can be printed. According to Flg. 6 let the stud chuck 7 with an adjustable length stop 26 provided, which is in the receiving channel for the Balzen 13 and is arranged coaxially to this.

The insertion depth dea is determined by means of this length stop a respective bolt 13 can be determined. The length stop 16 can be designed as a threaded pin, for example. FIGS. 2 and 3 show details of the coupling part a 6 and the associated Bolzenheltera 7 shown. The stud chuck 7 is a front slotted sleeve which is provided with a flat spring washer 27 so that it is under Spring preload can hold the shaft of an inserted bolt and receive it.

At the rear, the stud chuck according to FIG. 2 is aelbathemmender Conical 28 formed. The associated coupling part 6 has a corresponding conical recess 29 on, whereby stud chuck and coupling part by toxic Can be connected to one another. To release the bolt backing 7 from the coupling part 6 If the coupling part 6 has an ejector «30 that can be actuated mechanically, magnetically or pneumatically, for example,

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by pressure on the bottom of the stud holder 7 this pushes out of the recess 29.

According to FIG. 3, the end of the stud holder 7 is cylindrical formed, while the receptacle of the coupling part 6 is formed as a correspondingly cylindrical clamping sleeve is. The end of the bolt holder 7 uird when moving towards one another of stud chuck and coupling part automatically with temporary spreading of the clamping jaws of the Kuppiungeteiles received from the coupling part 6, while the Separation takes place by an ejector 30, for example pneumatically actuated, which on the one hand supports the bolt guard 7 pushes out of the coupling part 6 and on the other hand the The jaws of the coupling part 6 spreads through corresponding run-on bevels 31.

Finally it should be noted that the coupling part 6 via a guide rod 32 with the welding head? tied together is which leadership time is to be carried out at the same time

^ the electrical equipment of the device is used. the

Guide rod 32 is either itself with an actuator

S, which controls the outward and inward movement,

;, or it iet, as for example in Flg. 5 shown

\ In addition to the guide rail, another arrangement of one

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Bettermann 7586/31

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KalbBnatange aaa ArbeitszylindBra made the UErBtBllen dB8 coupling part 6 affects, then the FuhrungsatangE 32 only fulfills management tasks.

All new ones disclosed in the description and / or drawing Individual and combination features are considered to be inventive indicate.

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Claims (1)

1. Device for welding of balconies and the like with an oar piece, consisting of an electric one Stud gun (2) with a swivel-mounted welding head (5) on which at least one stud holder (7) is releasably attached, which is controlled axially displaceable is, and a transfer station (9) for the transfer of a bolt (13) from a feed device (tu) the stud holder (7), and the stud holder (7) by swiveling the SchuielBkopfea (5) coaxially to the transfer part the transfer station (9) can be aligned, characterized in that outside the pivoting range of the Welding head (5) including stud holder (7) on an arc, its center in the swivel center (f ») of the welding head (5), several transfer stations (9) with Corresponding stud feed clock device (10) next to Bettermann 7586/81 ■ ■ ti »et ··· ·» ■ are arranged to each other that in the direction of the welding head (5) in front of each Übergabeeatatian (9), to the Schueißkapf (5) aligned, a holding device (11) for a stud chuck (7) is arranged, ujobei each Holding device (11) carries a bolt holder (7), and that the shooting head (5) is an alternatively axially one of the stud chucks (7) has adjustable coupling part (6) which iahlueise to one of the respective, in the holding device (11) provided stud holder (7) can be coupled bzu. of the respective discharged, inserted into the holding device (11) can be decoupled. 2. Device according to claim 1, characterized in that with the welding plane (1) arranged vertically below the shooting head (5), the transfer stations (S) nicest holding devices (11) and stud feeding device (10) are arranged approximately vertically above the welding head (5), with these devices within a swivel range of approximately on both sides'
are held in a perpendicular position. Areas of approximately k5 ° on both sides - starting from the • 'ι ·. t Ii t • »I · Il Il I
ti It It it | t I I III * Bettermann 7586/81 '··' "'*' 3. Device according to claim 1 or 2, characterized in that the 0ol2en2ufühfeinriühung (10) is executed a vibrator feeding the bolts (13) in a suspended manner and this as a transfer station (9) clamping jaws (15) that release the bolt (13) as soon as the handover to the respective broom holder (7) takes place let « t * »device according Ansprucn 3, characterized in that the DAB the clamping jaws (15) by means of an actuator in the Freigabeatellung and are guided back. 5. Apparatus according to claim U, characterized in that at least one pneumatic working cylinder (21) at the transfer station is supported as an actuator, by means of which the clamping jaws (15) can be pushed apart for the purpose of bolt release. retractable bind. 6. Apparatus according to claim U, characterized in that the stud holder (7) is designed as an actuator, the clamping jaws (15) being expandable by this against spring pressure. * I It * I · · Bettermann 75Θ6 / Θ1 ft 7. Apparatus according to claim 6, characterized in that the clamping jaws (15) have an EinfUhrungskanal (19) for the Form the tip of the Bölienheltere (7) in the direction of introduction The bolt lighter (7) has an at least slightly larger radius than that in particular The conical insertion end of the stud holder (7) is designed to taper up to the Bal2enradiue, so that the f Clamping jaws (15) in the transfer position through the bolt | holder (7) releasing the respective bolt (13) J are spread. 1 B. Apparatus according to claim 7, characterized in that | in the direction of introduction of the stud holder (7) behind the | Clamping jaws (15) a pressure piece (20) is arranged, \ against which the bolt picked up by the bolt holder (7) (13) can be pushed through the stud holder (7) after release by the clamping jaws (15) » 9. Apparatus according to claim Θ, characterized in that on the pressure piece (2D) from the stud holder (7) connectable electrical contacts are arranged. Bsttermann 75B6 / B1 »· · · Il It ' 1D. Device according to one of Claims 1 to 9, characterized in that the broom holder (7) on the Sehuieißkepf (S) by means of automatically detachable clamping jaws is hardened (Fig. 3). 11. Performing according to Anapruch 10, characterized in that that the clamping jaws by means of a pneumatic workB-cylinderB are spreadable (Fig. 3). 12. Device according to one of claims 1 bia 9, characterized in that the stud holder (7) has an in a corresponding conical recess 49) of the shooting head (5) has insertable self-locking conical pin (28) and by means of a coaxial to the recess (29) in the shooting head (5) arranged Aus ^ erers (30) is releasably insertable. 13. Device according to one of claims 1 to 12, characterized in that the welding head (5) by means of a electric stepper motor is pivotable. aiH ι 1 marked, <-; ° n * \\ p U in ι ι I I'M liny ι Ii II ι mil ι Ii ge l jim tan