JP2840468B2 - Lead plate automatic welding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an article to be welded such as a battery.
The present invention relates to an automatic welding apparatus for automatically supplying and welding a lead plate.

[0002]

2. Description of the Related Art Conventionally, when a terminal plate or the like is automatically fixed to an aligned relatively small welding target by spot welding, the terminal plate supplied from a part supply device such as a parts feeder is vacuum-absorbed or magnetically attached. The spot is picked up by a suction head, transferred onto a welding object aligned on a transfer means such as a conveyor, and a welding head installed at a predetermined position on the conveyor is lowered to perform spot welding.

[0003]

However, in vacuum suction or magnetic suction, a positional deviation at the time of suction, a positional deviation at the time of transfer, or a suction error is likely to occur. It has not been possible to accurately weld to a predetermined position of a welded article, which has been a problem in high-speed driving.

[0004]

For this reason, in the automatic lead plate welding apparatus of the present invention, a plurality of lead plate grips having a pair of upper and lower gripping fingers are arranged at equal intervals on the circumference of the index table. The lead plate supplied from the lead plate supply unit is
It is gripped by the gripping fingers of the lead plate gripper located in the lead plate supply unit, and the presence or absence of the lead plate is detected by a sensor while being gripped and sent to immediately below the welding head. Then, the lead plate holding portion is lowered, and the lead plate is held on an article to be welded such as a battery placed in alignment with an XY table or the like, and the welding head portion is lowered to weld the lead plate. After pressing and holding on the article, the gripping fingers are released and welding is performed. When the welding is completed, the lead plate gripping portion is sent to the lead plate supply portion while being raised, the gripping fingers are released and the lead plate is supplied, and thereafter, the above operation is repeated.

[0005]

According to the automatic lead plate welding apparatus of the present invention, a lead plate can be welded to a predetermined position of an article to be welded with uniform dimensional accuracy.

[0006]

An embodiment will be described below with reference to the drawings.

FIG. 1 is a side view showing an embodiment of the automatic lead plate welding apparatus according to the present invention. Lead plate automatic welding equipment is base 11
A lead plate supply unit 2, a work table unit 6, a driving unit 71, and a control unit 8 are arranged on the sub-base 12, and a lead plate transfer unit 3, a lead plate detection unit 4 ( 3), welding head 5, drive mechanism 7 (FIG. 4)
Are arranged. Next, each component will be described.

-Lead plate supply unit-The lead plate supply unit 2 includes a hoop material supply reel 21, a guide roller 22, a pitch feed unit 23, and a lead plate manufacturing unit 2.
Consists of four.

The hoop material supply reel 21 is loaded with a lead plate roll supplied one by one in a hoop state. Reference numeral 22 denotes a plurality of guide rollers on the running path of the hoop material for assisting the running of the hoop material. 23 is a pair of upper and lower holding rollers 231 for holding the hoop material from above and below,
It is a pitch feeder that includes a pulse motor 232 for rotating one of the holding rollers 231 by a specified amount and a pulse motor drive unit (not shown), and feeds the hoop material at a specified pitch. Reference numeral 24 denotes a cutting / molding die 2 having a hoop material cutting function and a molding means, and descending onto a hoop material traveling path by a cam drive (not shown) of a drive mechanism 7 described later.
41, and a receiving die 242 that rises below the hoop material traveling path when the die 241 descends. The lead for cutting the hoop material sent from the pitch feeding means 23 at a predetermined position and forming it into a designated shape. Plate manufacturing means.

FIG. 2 is a side view showing the structure of the lead plate transfer unit in this embodiment. The lead plate transfer unit 3 includes a frame 31, an index table 32, a lead plate gripping unit 33, and first, second, and third elevating guides 34, 35, and 36.

The index device 321 has an input shaft located on the upper surface and an output shaft located on the lower surface, and is mounted on a frame 31 attached to the sub-base 12 via a support block 311. Project through the through hole. The index device 32 is provided with a shaft through an opening of the frame 31 and a through hole of the support block 311.
This is an index table which is key-coupled to a single output shaft in a suspended manner, and has lead plate grips 33 arranged at equal intervals at four locations on the circumference.

The lead plate grip 33 is provided at an angle 33 provided perpendicular to the table surface of the index table 32.
2 is a lower gripping finger 331 attached to be able to move up and down.
a and an upper gripping finger 331b attached to the lower gripping finger 331a so as to be able to move up and down.

As shown in FIG. 3, the gripping finger 331a has a tip bent in a direction opposite to the rotation direction, and has an L-shape.
It has a grip surface that intersects 31b and supports the grip surface of the grip finger 331b. The grip fingers 331a are respectively provided on rails 334 on the rear surface and the front surface of a portion parallel to the angle 332.
a and 334b in the vertical direction, and a slider 333a fixed to the angle 332 is attached to a rear rail 334a.
Attach so that it can move up and down via. Then, the gripping finger 331a is moved to the rail 334 by the tension coil spring 335a provided between the gripping finger 331a and the angle 332.
It is urged upward along a. In addition, gripping finger 331a
The up-and-down operation of an up-and-down guide, which will be described later, is transmitted to the grasping finger 331a by a cam follower 336a provided at the upper end of the gripper 331a.

The gripping finger 331b has a gripping surface on the lower surface of the tip thereof, and faces in parallel with the gripping surface of the gripping finger 331a. The grip finger 331b is attached to a front rail 334b of the grip finger 331a via a slider 333b provided on a rear surface of a portion parallel to the angle 332. Then, the tension coil spring 335b provided between itself and the grip finger 331a causes the tension finger spring 335a to move downward, that is, grip the finger 331a.
To the side along the rail 334b. Further, a cam follower 336b provided at the upper end of the gripping finger 331b transmits a lifting operation of a lifting guide described later to the gripping finger 331b.

Reference numeral 34 denotes a first elevating guide which is attached to an angle 341 which faces the opening of the frame 31 and is perpendicular to the table surface, and penetrates this opening. Upper gripping finger 331
b is raised and lowered. The first lifting guide 34 includes a rail 342.
The slider 343 is fixed to the vertical surface of the angle 341, and the rail 342 is fixed to the vertical surface of the first lifting guide 34, and is attached to the angle 341 vertically. And the first
The elevating guide 34 has a spherical slide bearing 344 at an upper end portion, and connects the swing lever of a driving mechanism described later to itself. The first lifting guide 34 has a concave engaging portion on the rear surface of the lower end portion, and engages with the cam follower 336b at the upper end of the upper gripping finger 331b near the lead plate supply portion.

Further, a second lifting guide 35 and a third lifting guide 36 having the same structure as the first lifting guide 34 are arranged near the welding head. The second elevating guide 35 includes a gripping finger 331.
a of the cam follower 336a of the gripper 331b.
Is for

FIG. 3 is a top view of the index table and the lead plate gripping unit, showing the lead plate transfer process. The lead plate detecting section 4 includes a sensor 41 and a mounting bracket 42.

Reference numeral 42 denotes a sensor 41 which is installed above a position where the lead plate P gripped by the lead plate gripper 33 in the lead plate supply unit 2 is index-fed by 90 degrees and temporarily stopped.
Is attached to the lower surface of the frame 31 with a mounting bracket for fixing. Reference numeral 41 denotes a sensor such as a reflection-type photosensor, which detects whether or not a lead plate exists at a point immediately below the lead plate holding portion that temporarily stops.

-Welding Head Portion- As shown in FIGS. 1 and 3, the welding head portion 5 includes a welding head 51, a pressure unit 52, and a fourth elevating guide 53.

Reference numeral 51 denotes a welding head comprising a welding electrode Wa and a welding electrode Wb. The lead plate P gripped by the lead plate gripping portion 33 and fed by the index through the lead plate detecting portion 4 is transferred to a work table portion described later. Aligned work X
Welded on the upper surface by resistance welding. Reference numeral 52 denotes a pressure unit for bringing the lead plate P into contact with the upper surface of the work X at a constant contact pressure, and makes the contact resistance between the lead plate P and the upper surface of the work X constant. Reference numeral 53 denotes a fourth elevating guide for elevating and lowering the pressurizing unit and the welding head, and rails 55 provided vertically on the side wall 312 of the frame 31 via the slide unit 54.
To be able to move up and down. Then, like other lifting guides, it is connected to the swing lever of the drive mechanism described later by a spherical slide bearing (not shown) provided at its upper end.

-Work table section-The work table section 6 is composed of an XY table 61 and a work installation table 62, and is operated by a command of a control section described later.
Multiple workpieces positioned and aligned on the workpiece
The welding head is sequentially positioned at the lowered position.

FIG. 4 is a top view showing the structure of the driving mechanism in the present embodiment. The driving mechanism 7 includes a driving means 71, a cam shaft 72, and a cam group 731 as shown in FIGS. , 732, 733, 7
34, swing lever groups 741, 742, 743, 744,
It comprises an index table drive unit 75.

Reference numeral 71 denotes a driving means for rotating the cam shaft.
The motor 711 and the reduction gear 712 shown in FIG. 1 are used. The rotation speed of the motor 711 is reduced at a constant rate by the reduction gear 712, and the sprocket 713 attached to the output shaft is rotated. Reference numeral 72 denotes a cam shaft to which a worm 751 of a cam group and an index table driving unit is mounted. The cam shaft 72 is rotatably supported by bearing units 721, 722, and 723, and is mounted on the sub base 12. Then, a sprocket 724 is attached to one end of the cam shaft,
According to the rotation of 3, the camshaft 72 is rotated by chain transmission. The cam groups 731, 732, 733, and 734 swing the swing lever groups in an angle change pattern for each cam by rotation of the cam shaft. The swing lever group includes four swing levers 741, 742, 743, and 744.
The swinging lever 741 is connected to the upper end of the elevating guide 34 with one end thereof as an operation point, and the fulcrum is rotatably supported by the fulcrum shaft 745, and the rotation of the cam 731 is applied to the power point. Then, a tension coil spring 747 is attached between the other end of the swing lever 741 and the surface of the sub-base 12 on which the bearing unit is attached, and the swing lever 741 is moved in a direction in which the force point and the cam 731 always contact. Energize. The other swinging levers have the same configuration, and the swinging lever 742 is in contact with the cam 732 with the fulcrum shaft 746 as a fulcrum, is connected to the elevation guide 35, and is urged to the cam side by a tension coil spring (not shown). You. The swing lever 743 is in contact with the cam 733 with the fulcrum shaft 746 as a fulcrum, is connected to the elevating guide 36, and is urged toward the cam by a tension coil spring (not shown). Swing lever 74
Numeral 4 has a fulcrum shaft 746 as a fulcrum and is in contact with the cam 734 to be connected to the elevation guide 53, and is urged toward the cam by a tension coil spring (not shown). Reference numeral 75 denotes an index driving unit that drives the index device 321.
The rotation of the worm 751 attached to the cam shaft rotates a worm wheel (not shown), and rotates the pulley 752 attached to the same rotation shaft. Then, by the belt transmission, the pulley 753 attached to the input shaft of the index device 321 is rotated to drive the index device.

-Control Unit- The control unit 8 comprises a sequence control unit 81 and an XY table control unit 82. The sequence control unit 81 controls the pitch feed means 23 and the drive means 71 of the lead plate supply unit 2. Then, based on the detection result of the lead plate detecting section 4,
Control. The XY table control unit 82 controls the XY table 61 according to the control signal of the sequence control unit 81,
Control to move to a preset position.

-Operation- The operation of this embodiment having the above configuration will be described with reference to the cam diagram of FIG.

First, a hoop material in the form of a roll, which is a material of a lead plate, is loaded on a hoop material supply reel 21, and the leading end thereof is set at a predetermined position of a pitch feed means 23 via a guide roller 22.

When the automatic operation of the automatic lead plate welding apparatus is started, the pitch feed means 23 feeds a predetermined amount of hoop material, and the lower holding finger 331a of the lead plate holding portion 33 which is on standby.
The tip reaches the top (point A). At the same time, the driving means 7
1 is driven, the camshaft 72 starts rotating, and when the tip of the hoop material reaches the gripping finger 331a, the cam 731
As a result, the swing lever 741 swings to push down the elevating guide 34, lower the engaging upper gripping finger 331b, and grip the tip of the hoop material (point B). In addition, the lead plate manufacturing unit 24 operates to lower the cutting / forming die 241 and the receiving die 2.
42, the hoop material is cut and formed to become a lead plate, and the cutting and forming die 241 is raised and the receiving die 2 is raised.
Due to the lowering of 42, only the lead plate is gripped by the gripping finger 331 (point C). At this time, the index table 32 starts rotating by the camshaft and the index driving unit 75.
The motor is once stopped by one-half turn, and the gripped lead plate is positioned immediately below the sensor 41 of the lead plate detection unit 4. When the sensor 41 detects the presence of the lead plate, the sequence control unit 81 executes welding on the welding head unit 5 when the lead plate holding unit 33 holding the lead plate is sent to the welding head unit 5. Let it. When the presence of the lead plate is not detected, welding is not performed even if the lead plate grip is sent to the welding head.

When the lead plate gripping portion 33 is sent to the welding head portion via the lead plate detecting portion 4 and further by a quarter rotation of the index table 32, the lower end of the elevating guide 35 waiting at the upper limit position is set. The cam follower 336a comes into contact with, and the entire lead plate gripping portion 33 is lowered by one step along the lower end of the elevating guide 35 and then temporarily stopped. At this time, the XY table 61 of the work table section is positioned by the XY table control section 82 so that the work to which the lead plate is to be welded is located directly below the welding head 51.

Once stopped at the welding head, the cam 73
2, the swinging lever 742 swings to push down the elevating guide 35, and the entire engaged lead plate gripping part 33 is further lowered by one step, and the lead plate is placed on the upper surface of the work positioned on the work table 62. It is placed (point D). At substantially the same time, the swing lever 744 is swung by the cam 734 to push down the elevating guide 53, thereby lowering the welding head and pressing the lead plate on the upper surface of the work with a constant pressure (point E).
Simultaneously with the pressing, the swing lever 743 is moved by the cam 733.
Swings to lift the elevating guide 36, raise the engaging upper grip finger 331b, and release the lead plate (F
point). After releasing the gripping of the lead plate, the sequence control unit 81 instructs the welding head unit to execute welding. When the welding is completed, the swing lever 744 is swung by the cam 734 to push up the elevating guide 53 and return the welding head 51 to the original position (point G).

After the end of the welding operation, the lead plate gripping portion 33 is further fed by a quarter turn of the index table 32 and temporarily stops. At the beginning of feeding, since the gripping finger 331b is engaged with the lifting guide 36 and ascended, the gripping finger 331b advances when no force is applied to the welded lead plate, and when the cam follower 336b is disengaged from the lifting guide 36.
Is lowered to be in an empty gripping state. When the cam follower 336a is disengaged from the elevating guide 35, the lead plate gripping portion 33 is returned to the upper limit position by the tension coil spring 335a. In this position, no operation is performed in this embodiment.

When the sheet is transferred from the non-working position a further one-fourth time and once stopped at the original lead plate supply section, the cam follower 336b rides on the elevating guide 34 at the upper limit position and the gripping finger 331b rises during feeding. Therefore, it stops with the grip released. This state is one mechanical cycle performed by one lead plate gripper 33, and the other lead plate grippers also perform this continuous operation.

[0032]

According to the automatic lead plate welding apparatus of the present invention,
While holding the supplied lead plate at a fixed position, it feeds the index to the welding position after detecting the presence of the lead plate. Can be welded.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of an automatic lead plate welding apparatus according to the present invention.

FIG. 2 is a side view illustrating a configuration of a lead plate transfer unit according to the embodiment.

FIG. 3 is a top view of an essential part of an index table and a lead plate gripping portion for explaining a lead plate transfer process in the embodiment.

FIG. 4 is a main part top view showing a configuration of a drive mechanism according to the embodiment.

FIG. 5 is a cam diagram of a drive mechanism for explaining the operation of the embodiment.

FIG. 6 is a perspective view of a work in which a lead plate is welded in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lead plate automatic welding apparatus 2 Lead plate supply part 3 Lead plate transfer part 4 Lead plate detection part 5 Welding head part 6 Work table part 7 Drive mechanism 8 Control part 32 Index table 33 Lead plate grip parts 34, 35, 36, 53 Elevating guide 41 Sensor 71 Driving means 72 Cam shaft 731, 732, 733, 734 Cam group 741, 742, 743, 744 Swing lever group P Lead plate X Work

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁶ identification code FI // B23K 101: 38 (58) Investigated field (Int.Cl. ⁶ , DB name) B23K 11/00 560 B23K 11/11 593 B23K 37/00 B23K 37/04 H01M 2/26 H05K 13/00

Claims (1)

(57) [Claims] 1. An apparatus for automatically supplying a lead plate to a predetermined position of an article to be welded and welding the lead plate, the lead plate automatic welding being provided with the following configuration and sequentially performing the following steps. apparatus. Configuration: (a) Index table. (B) holding a pair of upper and lower gripping fingers, and being provided at equal intervals around the circumference of the index table so as to be vertically movable;
Multiple lead plate grips. (C) a lead plate supply unit for supplying a lead plate to one of the lead plate holding units. (D) A sensor for detecting the presence or absence of a lead plate held by the lead plate holding portion. (E) a welding head for welding the lead plate held by the lead plate holding unit to a predetermined position of the article to be welded; (F) A lead plate gripper located at the lead plate supply part and the welding head part or a gripping finger thereof, and an elevating guide group for vertically moving the welding head part. (G) A swinging lever group that has one end connected to the lifting guide group and the other end supported by the cam group, and moves each lifting guide up and down according to the shape pattern of each cam. (H) driving means for driving the cam shaft on which the cam group is mounted and the index table in association with each other. (I) a control unit that controls the lead plate supply unit, the welding head unit, and the driving unit; Step: (A) A step of causing the holding finger of the lead plate holding unit to hold the lead plate supplied from the lead plate supply unit. (B) a step of welding the lead plate gripped in the item A to a predetermined position of the article to be welded based on the detection result of the sensor. (C) A step of releasing the gripping finger of the lead plate gripping portion after welding.