JPS59120382A - Welder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The invention relates to a welding device according to the preamble of claim 1, which can be used, for example, for welding tapes with very high welding takt times.

Known devices of the above-mentioned type operate, for example, in such a way that the contacts are supplied to the holding body via a switching wheel. Naturally, this method of operation increases the size of the welding device and increases the amount of kinetic energy that must be controlled, which adversely affects control accuracy and operating speed. In other welding devices of the above-mentioned type, the contacts are cut off from one line of contact material by means of a hardened cutting tool and then transferred from the following line of material into the holding body in the next feed stroke.

At this time, in known devices, many contacts are arranged side by side or in contact with each other, so that division errors of individual contacts accumulate, and a slight division error can cause disturbances in the welding operation. , therefore has the disadvantage that the reliability of the operation of the welding device is relatively low. In other known welding devices, a second, longer feed stroke always shifts the previously severed contact obliquely below the electrode within a special operating tact, so that the operating speed and accuracy are marginally affected. However, especially with very thin contact materials, there is a risk of bending the contact material which shifts.

An object of the present invention is to configure the welding device described in the preamble of claim 1 so that it can achieve a high takt time, and at the same time, it can be downsized and the reliability of its operation can be increased. That's true.

This object is achieved by a welding device having the features set out in claim 1.

According to the invention, each contact is individualized and is conveyed completely reliably through the feed section and onto the holder under the electrode in a precisely defined position, thereby improving the operational voltage and operational reliability of the welding device. Sexuality is enhanced. The slit in the lifting fitting allows the lip ink fitting to be returned from the lifted position again when the transfer fitting is still located in close proximity to the welding point, so that the very long travel of the transfer fitting can be removed from the welding equipment. does not adversely affect the operating speed of the

Since the movements of the transfer fitting and the lifting fitting no longer need to be matched to each other after the individualized contacts have been raised to the level of the supply section, the movements of these elements are then independent of each other at the same time. This can be carried out with as little mass force as possible taking into account an optimal movement course. Furthermore, the lifting fittings can be returned again immediately after the individualized contacts have been raised, and in this position they can already fulfill the subsequent operating function, so that the operating speed or the tact that can be achieved with the welding device according to the invention is reduced. The number can be greatly increased and the absolute speed of the moved parts can be kept small. This leads to relatively small acceleration forces and therefore also to the fact that the guided and driven parts can be carried out with low forces.

The operational reliability and uptime of the welding device are thus further increased. By receiving individualized contacts within the bore and feed section of the lifting fitting,
Through the fall slit an absolutely reliable and constant guidance that is only slightly influenced can take place. Overloading is avoided even when using very narrow transfer fittings, since the transfer fittings only have to exert a very small force on the individualized contacts in order to displace them into the feeding section. .

As mentioned above, this transport stroke can be made very long, since almost all the takt time can be utilized for the movement of the transfer fitting, which is decoupled from the movement of the lifting fitting, and therefore the welding device according to the invention is versatile and can be used to weld contacts to tapes or carriers with a very wide range of widths.

Lifting fittings do not need to perform pure lifting movements unconditionally. The invention provides that the second feed section is offset in an arbitrary manner with respect to the first feed section of the guide tunnel, and that the transfer fitting receiving the individualized contacts has alternating holes provided therein. It should be emphasized that it can also be configured to be movable between two end positions such that it is aligned with the holes of both feed sections. The transfer fitting, in this general case, has a centrally transitioning slit into the hole, which slit serves to receive the transfer fitting, the dimensions of which are free to move through the slit. It is defined as follows.

Since the lifting fitting only has to move one individualized contact from the plane of the first feed section to the second feed section, its energy consumption and therefore also its kinetic energy can be kept very small. A very narrow transfer fitting at the same time has a very small mass, which has an advantageous influence on the dynamic properties of the welding device.

In the embodiment according to claim 2, the lifting fitting is additionally given the function of a cutting tool, and a special advantage is obtained in that the welding device is not enlarged and is well-oiled. In this case, the welding device is designed such that the lifting fitting is returned to its lower position immediately after the passage of the transfer fitting, and in this position the lifting fitting has already been moved by a certain feed stroke during the movement of the transfer fitting. The contact material is operative to accept the contact material that has been deposited.

After the transfer fitting has been returned to its position outside the slit, the lifting fitting is moved for the cutting process of the contact material.

The embodiment according to claim 5 results in a further simplification of the welding device. This is because in this case the anyway necessary tact-lifting movement of the electrode can be used to periodically raise the lifting fitting. In this case, the hole in the lifting fitting can already be adapted to the contact profile so that it can accept a new contact material or a new individualized contact when the retaining arm has not yet fully reached its welding end position. The hole in the noering fitting is configured to have an oversize of. Preferably, control is provided such that the holding arm together with the rich ink fitting is lowered into a position immediately after the start of feeding of the transfer fitting into a position such that the electrode is located in front of the welding end position by a small dimension. This dimension is already adjusted to the oversize of the hole in this position so that the introduction of a later-supplied contact point is possible. In this position of the holding arm or electrode the contact is displaced from the transfer fitting between the welding electrode and the holding body.

The embodiment according to claim 9 allows the welding device to be used in any position and orientation without adversely affecting the operational and functional reliability. The welding device may, for example, be attached to the device by means of a flange so that the transfer fitting performs a vertical movement. Since the contacts are received in the matching tunnel section, they are guided 45 to the electrodes without being lost and without additional suction and positioning devices.

According to the embodiment according to claim 10, the welding device is made more compact and even simpler, since only a single drive is required.

The embodiment according to claim 13 provides the additional advantage that the electrodes or electrode materials of the welding device can be changed very easily with simple manual operations.

Further advantageous embodiments are indicated in the further claims.

Hereinabove, one embodiment of the present invention will be described in detail with reference to the drawings.

The welding device has a case 4 in which a holding arm 1 of an electrode 2 is rotatably supported via a shaft 3, preferably with low friction. The holding arm 1 forms one current-carrying part of the welding device and is connected to the welding current couple at the point marked by arrow A in the drawing. Other electrodes, not shown in detail, are likewise connected to a welding current contact, which is mounted insulated on the underside of the housing 4.

Inside the case 4 there is located a curve holder 5 which is driven from the outside via a chain or other drive mechanism, on which a number of control curve segments and a front surface, not shown in detail, are located. A curved track 7 with machined sides is located.

The curve holder 5 controls the feeding, cutting and electrode movements in precise temporal relation to each other.

The cyclic movement of the holding arm 1 takes place via a cam follower roll 15 (indicated by dashed lines in the drawing) which is tangent to the control curve of the curved holding body 5 after the biasing force of the spring.

On the left in FIG. 1, the welding device is supplied with contact material 14, drawn for example from a band or coil. The contact material on this band is then fed to a cutting station by feeders 8-13, which will be described later.
The individual contacts are then manufactured and then shifted between the welding electrode 2 and the holder 20 in order to carry out the actual welding process. The welding device is driven in such a way that a feeding movement of the contact material, a separating movement and a transport movement of the individualized contacts take place during one working duct.

The contact material 14 is first applied to the clamping piece 11 in the welding dosing device.
and the feed slider 9 which moves towards the replaceable stop 23. The movement of the feed slider 9 and the generation of the pressing force of the clamping element 11 take place via links 8 to 13, each of which is controlled by one cam, the links controlled by these cams also having a curved line. It is controlled by the curve on the holder 5. The elements of the curve-controlled link for the feed slider 9 and the pressure element 11 are biased towards the respective control curve of the curve holder 5 via externally settable springs 13 and 10. In this way, for example, the spring 10 sets the feed force, and the spring 13 sets the clamping force between the feed slider 9 and the clamping piece 11.

The contact material 14 is fed from the feed devices 8 to 13 into the feed section 2, which is configured in the form of a grid or as a guide tunnel.
Supplied within 4 days. The cross section of the guide tunnel is matched to the cross section of the profiled contact material 14. The supply terminal 24 terminates at the lifting fitting 21. As can be seen from FIG. 2, the lifting fitting 21 has a through hole 211 which approximately corresponds to the contact profile. The lifting fitting 21 can be reciprocated between two end positions in a direction transverse to the direction of the supply section 21, during which the lifting fitting 21 can be moved back and forth between two end positions.
The bore 211 is located in line with the feed section 24 in one end position shown in FIG. 1 and with the feed section 22 of the welding device in the other end position. The feed section 22 is offset with respect to the feed section 24 by a dimension V which corresponds exactly to the working culm of the lifting fitting 21. The supply section 22 is guided in such a way that its lower border line coincides with the surface of the holder 22 .

As shown in FIG. 1, feed section 22 preferably extends parallel to and beyond feed section 24. Hole 21 in lifting fitting 21
1 transitions on the side facing the feed section 22 into a central narrow slit 212, the length of which extends to the equally narrow guide slit 221 of the feed section 22 in the lower end position of the lifting fitting 21. were selected so as not to cover the A transfer fitting 18 is bowed above the supply section 24 in a straight line with the guide slits 1 to 221, and the transfer fitting 18 can perform reciprocating motion in the direction of the guide slit 221. This transfer fitting also has two working end positions. In one end position shown in FIG. 1, the front end of the transfer fitting 18 is located approximately outside the slit 212. In the other end position, which is shown in dashed lines in FIG.

The transfer fitting 18 is likewise driven via the curve holder 5, and more specifically via the envelope curve 7.

In the embodiment shown in FIG.
is drawn as a cutting metal fitting, and the supply L comb 24
Cutting of the cutter 1 to the abrasive material 14 formed during the movement from the plane of the supply section 22 to the plane of the supply section 22 is carried out. In this way, the contacts are individualized during lifting of the lifting fitting 21. After the holes in the lifting fitting 21 are aligned with the holes in the supply section 22 in the lifted position of the individualized contacts, the front end of the transfer fitting 18 is pushed into the slit 212; The individualized contacts are thereby guided precisely from and through the bore 211 in the feed section 22 between the welding electrode 2 and the holder 20.

The supply section 24, the lifting fitting 21 and the supply section 22 always form one replaceable element set, which is preferably mounted on the top surface of the case 4 in an easily replaceable manner.

In the embodiment shown in FIG.
are not driven independently, but together with the holding arm 1 of the electrode 2. For this purpose, the lifting fitting 21 is connected to the holding arm 1 in a separated manner via a claw-like plate 25 by force connection. Within the lifting fitting 21 the holding arm has a hole into which a connecting rod 27 extends, the lower end of which engages the lifting fitting 21 and the supply section 24 in a bifurcated manner and is removable. It is swingably mounted in the case 4 via a pin 6. The child end of the connecting rod 24 is provided with a thread, on which an adjusting nut 26 is attached.
is screwed on, and a welded pressure spring 16 is inserted between this adjusting nut and the pressure plate, which is supported in the hole of the holding arm 1. The welding pressure spring 16 presses the holding arm via the cam follower roll 15 against the associated curve or cam surface of the curve holder 5.

Similarly, by rotation of the adjustment nut 26, the springs 13 and 10
As explained above in connection with , a precise setting of the pressing force or welding pressure between the cam follower roll and the curve holder 5 can take place from the outside.

With the exception of the drive of the transfer fitting 18, in which a forcibly coupled link control of the feed link 17 is used, the movement of the other moving parts of the welding device is always against the springs 10, 13 and 16 as feed elements. This is also done by a curve as a return element.

In the following it will be explained how the movements of the various parts of the welding device are carried out in the desired temporal relationship. During rotation of the curve holder 5, the curve leg 1 of the control curve, which is operatively engaged with the vibrating lever 12, descends, so that the spring 13 pushes the contact material 14 against the clamping piece 11 and the vibrating lever 12. Press the feed slider 9 through the feed slider 9.

Now, the curve segment associated with the feed slide 9 is also lowered, so that the oscillating lever 8, which is associated with the feed slide, feeds the contact material 14 under the action of the spring 10. The feed stroke can be set by replacing the stopper 23. The contact material 14 is displaced through a grid-shaped feed section 24 of the guide tunnel to a lifting fitting 21 located near the lower end position. As mentioned above, the lifting metal fittings 21 are
Over its entire length L, it has a hole with a certain oversize adapted to the contact material profile. The length of the contact 19 finally supplied to the electrode is predetermined by the stopper 23. The length L1 of the lifting fitting 21, which in this embodiment is designed as a cutter, is selected in such a way that the best contact to be welded can be located therein.

The third curved segment of the curved retainer 5, which is now operatively engaged with the cam follower roll 15, rises and moves the retaining arm 1 with the electrode 2 and the lifting fitting 21 against the force of the welding pressure spring 16. Furthermore, during the feed movement the separated and individualized contacts 19 are connected to the feed section 22 of the guide tunnel.
Raise it until it is in a straight line. At that time, the lifting fitting 21 moves through the stroke V (Fig. 2), so the hole 21
1 comes to be located within the sliding surface of the transfer fitting 18.

Once the lifting fitting 21 has reached its upper end position, the feed movement of the transfer fitting 18 through the bore 211 in the lifting fitting 21 and the feed section 22 is started under control according to the envelope curve 7 via the feed lever 17 .

During this movement, the contact 19 located in the hole 211
The holding body 20 is moved to the position where the welding process is to be performed.

Immediately after the contact 19 leaves the hole 211 of the lifting fitting 21, the holding arm 1 and thus also the electrode 2 are moved under the action of the welding pressure spring 16 via a third curved segment cooperating with the cam follower roll 15. , to a position where a gap of about 0.1 mm is left between the holder 20 and the lower surface of the electrode 2. The individualized contacts 19 are displaced into this gap under the action of the transfer fitting 18.

Due to the large transmission ratio of the vibrating holding arm 1, the lifting fitting 21 is already at the lower end position of 0 at this point.
It will be understood that it occupies a position above 0.05 mm. Hole 21
A new feed stroke can already be started in this position due to the above-mentioned oversize of 1.

During the return stroke of the transfer fitting 18 and during the feed movement of the feed slider 9, the electrode 2 is defined by the force of the welding pressure spring 16 due to the further lowering of the third curved segment acting in cooperation with the cam follower roll 15. is pressed onto the contact 19 with a pressure applied to the contact 19.

At this moment the welding process begins, during which the electrode 2 is lowered still slightly by the melting distance.

A sufficiently high slit 212 allows the stage to pass through the transfer fitting 18
It can also be used for the return process. As soon as the transfer fitting 18 exits the hole 211 again, a new working takt can begin.

A connecting rod 2 rotatably supported in a case 4
Via the adjusting nut 26 on 7, the welding pressure spring 16 can be set depending on the required welding pressure, taking into account the transmission ratios resulting from different distances up to the rotation point 3.

Since 1/3 of the total takt time is utilized for the subsequent transfer of the holder 20 during one takt, the welded contacts 19 are completely Only after further steps have been transferred are they in such a mutual position that a new contact can be brought under the electrode 2.

Nevertheless, in this welding device, the entire movement of the device by means of the slitted lifting or cutting fitting 21 is approximately 800 mm in a single welding time of 20 milliseconds.
As takt is possible, it can proceed on a production line and in any desired temporal relationship.

The welding device described above can also be used to advantage when the lifting fitting 21 is supplied with contacts prefabricated to any profile. In this case, the lifting fittings are provided with loading holes oriented perpendicular to the direction of movement of the transfer fitting 1B, which loading holes are connected to externally guided individual contact loading channels. The reciprocating movement of the lifting fitting 21 always grips a single contact 19 and brings it into a position in line with the feed section 22, at which point the transfer fitting 18 then enters the width of the hole 211 and the slit 212. Furthermore, in this case, the contact 19 is guided completely reliably and in place in the welding position during the entire stroke, so that the highest reliability of operation of the welding device can be maintained at all times. Lifting fittings 2
1 is connected to the loading channel for individual contacts, the lifting fitting may be configured to serve as a cutting tool for separating the individual contacts from the contact material band.

The configuration of the welding device described above allows very simple modification to adapt to different contact geometries. The replaceable element set consisting of supply section 24, lifting fitting 21 and supply section 22 is easily accessible. It will be appreciated that by rotating the holding arm 1 about the pivot pin 3 both supply sections can be made completely free. For modification, connecting rod 27
It is only necessary to remove the bottle that swingably supports the forked end of the bottle from the case 4, and to remove the plate 25 that engages with the lifting fitting 22 in a claw-like manner. At that time, it is preferable that the biasing force of the welding pressure spring 16 be slightly weakened in advance.

Since the distance of the lifting fitting 21 from the point of rotation 3 of the holding arm 1 is relatively large, the lifting fitting 21 need not be constructed with a cylindrical guide surface at the transition point to the supply section 22.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the welding device. FIG. 2 is a partial cross-sectional view taken along the line ■--■ in FIG. 1... Holding arm, 2... Electrode, 3... Axis, 4...
Case. 5... Curved holding body, 6... Bin, 7... Curved track, 8-13... Feeding device, 11... Contact material, 15... Cam driven roll, 20... Holding body, 21
...Lifting fittings, 22...Supply section,
23... Stopper, 24... Supply section, 25
...Claw-like plate, 26...Adjusting nut, 27...Connecting rod, 211...Hole, 221...Guiding slit Patent applicant Heinz Finzer Car Game agent Patent attorney Masaki Akashi

Claims (14)

[Claims] (1) A welding device, in particular for welding shaped contacts onto a holding body, in which the individualized contacts pass through correspondingly shaped guide tunnels between the welding electrode and the holding body. In an offset welding device, the guide tunnel has a first feed section (24) and a second feed section (22) that is offset in height relative thereto, with one inlet between them. Lifting fittings (21) are located, which lifting fittings each have one through hole (211) corresponding to the contact profile for one contact (19) and also have an electrode (2) on the hole side. A central slit (212) opening into the hole (211) for passing one transfer fitting (18) that is offset in the direction.
, and in addition a transfer fitting (18) is provided for raising the contacts (19) from the first supply section (24) to the level of the second supply section (22) by means of both guides 1 to 1.
A welding device characterized in that the channels (24, 22) can be shifted and moved laterally. (2) In the welding device described in claim 1,
A welding device characterized in that the material (14) can be separated by means of a lifting fitting (21) into a shaped contact 1 which is continuously fed through a first feeding section (24). (3) In the welding device according to claim 1, the lifting fittings (21) are arranged so that the individual contacts l to <19) arranged one after the other through the first supply section (24)
A welding device characterized in that the welding device is supplied to the second supply section (22) after being individualized by the second supply section (22). (4) In the welding position according to any one of claims 1 to 3, the first supply section (24) is in the same direction as the second supply section (22). A welding device characterized in that, alongside and at right angles thereto, one individual contact 1-loading channel is provided, which channel terminates laterally at a lifting fitting (21). (5) In the welding device according to any one of claims 1 to 4, the moving electrode is located on one swingable holding arm, and this holding arm (1) A welding device characterized in that the metal member simultaneously serves as a holder for the lifting fitting (21). (6) In the welding device according to claim 5, the lifting metal fitting (21) is force-coupled with the claw-shaped plate (25).
) A welding device characterized in that a holding arm is isolated and connected to the holding arm. (7) In the welding device according to claim 5 or 6, the transfer fitting (18) is inserted into the slit (212) of the lifting fitting (21) regardless of the position of the holding arm (1). A welding device also characterized in that it is movable through it. (8) The welding device according to any one of claims 1 to 7, characterized in that the transfer fitting (18) is controlled via one envelope curve (7). welding equipment. (9) In the welding device according to any one of claims 1 to 3, in order to drive the necessary holding arm (1) and material feeding device (8 to 13), A welding device characterized in that the curve serves as a return element and the springs (10, 13, 16) serve as feed elements. (10) In the welding device according to claim 9,
Welding device, characterized in that the envelope curve (7) and the curve as a return element are arranged on the holder (5) of (11). (11) A welding device according to claim 9 or 10, characterized in that all the springs (10, 13, 16) are individually adjustable from the outside. (12) In the welding device according to any one of claims 9 to 11, the feeding device (8 to 13) operates toward one replaceable stopper (23). A welding device characterized in that it has two feed sliders (9). (13) In the welding device according to any one of claims 1 to 12, the lifting fitting (21) and the first and second supply sections (22, 24) are replaceable as one unit. A welding device characterized by forming a set of elements. (14) In the welding device according to any one of claims 9 to 13, a feed spring (1
6) is supported by one removable connecting rod (27), and this connecting rod is connected to the lifting fitting (21).
A welding device characterized in that it is sandwiched in a forked shape and rests swingably on the soil of one removable pin (6).