JP3593636B2 - Parallel seam joining apparatus and parallel seam joining method - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a parallel seam joining apparatus and a parallel seam joining method suitable for joining a lid made of a ceramic or metal enclosure containing a semiconductor integrated circuit, a quartz oscillator or the like and a lid.
[0002]
[Prior art]
2. Description of the Related Art A parallel seam bonding apparatus for hermetically sealing circuit elements such as a semiconductor integrated circuit and a crystal unit generally has a ceramic package, which is an envelope, and a cover made of Kovar, which are overlapped with each other. The roller-like joining electrode rotates while pressing on it, and a current flows from one of the pair of roller-like joining electrodes through the lid to the other, so that the envelope and the lid are connected in a continuous line. Join.
[0003]
Here, in order to continuously join a large number of works, the work is arranged on the pallet along the X and Y axes. First, a joining process in one Y-axis direction is performed. An axial joining process is performed. This pallet usually carries out work with several tens to hundreds of works placed thereon, but there are cases where not all the pallets are placed on the pallet due to production planning. In such a case, the joining electrode operates assuming that all of the workpieces are present at the predetermined position, causing a problem. In order to cope with this inconvenience, for example, a dummy work is disposed at an empty pallet position. However, this method has a problem that the working time is unnecessarily long.
[0004]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION It is an object of the present invention to eliminate wasteful working time and improve efficiency when performing continuous joining work using a parallel seam joining apparatus.
[0005]
[Means for Solving the Problems]
In order to solve this problem, a first aspect of the present invention relates to a case in which an envelope containing a predetermined circuit element or an electronic circuit and a lid member are objects to be joined, and are coplanar along the X axis and the Y axis of the pallet. A joining head comprising: a pair of joining electrodes that rotate while pressing the placed article, and a sensor that recognizes whether the article is present on the pallet and the joining electrode. A parallel seam bonding apparatus comprising: a Y-axis moving mechanism configured to move the pair of bonding electrodes along the Y-axis of the pallet; and a bonding power supply configured to supply current to the pair of bonding electrodes . When detecting the object to be joined by the sensor, the interval between the pair of joining electrodes is widened, and when joining the object to be joined, the interval between the pair of joining electrodes is brought into contact with the edge of the object to be joined. parallel seam contact to adjust to the distance To provide a device.
[0006]
In order to solve the above-mentioned problem, a second invention is to form a rectangular envelope containing a predetermined circuit element or an electronic circuit and a lid member as objects to be joined, and to have the same along the X axis and the Y axis of the pallet. It has a pair of joining electrodes that rotate while pressing the article placed on a flat surface, and a sensor that recognizes whether or not the article is present on the pallet and the joining electrode. A parallel seam joining apparatus comprising: a joining head; a Y-axis moving mechanism that moves the pair of joining electrodes along the Y-axis of the pallet; and a joining power supply that supplies current to the pair of joining electrodes. The sensor is located at the center of the pair of bonding electrodes, and performs the vertical movement together with the vertical movement of the pair of bonding electrodes, thereby allowing the sensor and the pair of bonding electrodes to move together. parallel seam contact distance between is constant To provide a device.
[0007]
According to a third aspect of the present invention, there is provided a third invention in which a rectangular envelope containing a predetermined circuit element or an electronic circuit and a lid member are joined to each other, and are the same along the X-axis and the Y-axis of the pallet. It has a pair of joining electrodes that rotate while pressing the article placed on a flat surface, and a sensor that recognizes whether or not the article is present on the pallet and the joining electrode. A parallel seam joining apparatus including a joining head, a Y-axis moving mechanism that moves the pair of joining electrodes along the Y-axis of the pallet, and a joining power supply that supplies current to the pair of joining electrodes. In a parallel seam joining method for joining a workpiece,
(1) The presence or absence of the article to be joined is detected by the sensor before the joining electrode comes into contact with the article to be joined. When the article to be joined is present, the process proceeds to the step (2) below, A step of detecting whether or not the article exists by advancing to the next coordinate when the article does not exist ;
(2) a step of fixing and pressurizing the pair of bonding electrodes, applying a current for a very short time, and temporarily attaching the electrodes;
(3) a step of rotating the pair of joining electrodes while applying pressure to join sides of the article to be joined in the Y-axis direction;
(4) moving the joining head by a unit coordinate in the Y-axis direction of the pallet;
(5) repeating the steps (1) to (4);
(6) When the sensor detects that the article to be bonded does not exist in the same row of coordinates, or that the seam joining in the Y-axis direction of the article to be positioned at the final coordinate is completed. when the a step of 90 ° turning of the pallet,
(7) A parallel seam joining method comprising the steps of repeating the steps (1) to (4).
[0008]
【Example】
FIG. 1 is a system diagram of a parallel seam joining apparatus 1 according to the present invention. In the figure, a command is issued from the touch panel display 23 for complicated control of the joining process. Upon receiving this command, the CPU 21 sends a control signal to each control unit and the like, and receives a detection signal from the sensor 302 and the like. A floppy disk 25 is connected to the CPU 21 to read and write necessary data.
[0009]
The table turning mechanism / control unit 7 that has received the control signal from the CPU 21 turns the table 6 by the angle θ. The control signal from the CPU 21 is sent to the d control unit 17, the Z control unit 15, the X control unit 13, and the Y control unit 11 via the controller 19. The d control unit 17 supplies a signal for setting the electrode interval d of the bonding head 3. The Z control unit 15 gives a signal to the Z-axis elevating mechanism 5 to control the position of the joining head 3 in the vertical direction. The X controller 13 gives a signal to the X-axis moving mechanism 8 to control the position of the joining head 3 in the lateral direction. The Y control unit 11 sends a signal to the Y-axis advance / retreat mechanism 9 to control the position of the joining head 3 in the front-back direction.
[0010]
The table 6 on which the work 2 is placed can be turned at an arbitrary angle θ by the table turning mechanism / control unit 7. Here, the turning angle θ is specified to be 90 °. The work 2 is disposed on the upper surface of the table 6 in orthogonal coordinates.
[0011]
At both ends of the work 2, a pair of roller electrodes and a joining head 3 that supports the roller electrodes and moves up and down in the Z-axis direction are provided. The joining head 3 further has a function of moving in the X-axis and the Y-axis by an X-axis moving mechanism 8 and a Y-axis advance / retreat mechanism 9.
[0012]
FIG. 2 shows an embodiment of the joining head 3 in the parallel seam joining apparatus according to the present invention. First, the left roller electrode will be described. The left roller electrode 301 is mechanically rotatably supported by the arm 307 by the electrode holder 303. The roller electrode 301 is electrically well connected to the power supply shaft 305, and is connected to one end of the junction power supply (10). The arm 307 is mounted vertically by sliders 309, 311. These sliders 309, 311 can be freely slid in the vertical direction in combination with the guide 312. The guide 312 is fixed to the column 313. Further, the column 313 is attached to the base plate 501 via a slider 375 slidable in the horizontal direction and a guide 377. At the upper end of the column 313, an arm 315 is fixed horizontally and forward. A disk 319 is attached to a lower end of the arm 315 via a shaft 317. A flange 323 is provided at the upper end of the arm 307 so as to face the disk 319, and a coil spring 321 is inserted between the disk 319 and the flange 323. When the disk 319 is rotated, the shaft 317 connected to the disk 319 is vertically moved up and down by a screw at the connection point with the arm 315, so that the elastic force of the coil spring 321 can be adjusted. Although not shown, the disk 319 and the flange 323 are provided with a cylindrical or conical projection at the center of each of the disks 319 and the flange 323 to make the mounting and replacement of the coil spring 321 easier and more reliable. . The same effect can be obtained by providing an edge around both or any one of the disk 319 and the flange 323 instead of the projection. Further, the coil spring 321 can be replaced with another elastic body.
[0013]
The right roller electrode is also configured symmetrically with the left roller electrode. That is, the roller electrode 331, the electrode holder 333, the power supply shaft 335, the arm 337, the sliders 339 and 341, the guide 342, the column 343, the arm 345, the shaft 347, the disk 349, the coil spring 351, the flange 353, the slider 373, and the guide 377. Is configured.
[0014]
Next, a configuration for varying the distance d between the pair of roller electrodes 301 and 331 will be described. A yoke 360 is fixed near the left end of the base plate 501, and a yoke 365 is provided at intervals and a yoke 369 is provided near the right end. A stepping motor 361 is fixed to the yoke 360, a bearing 367 is provided to the yoke 365, a bearing 371 is provided to the yoke 369, a ball nut 325 is provided to the left column 313, and a right column 343 is provided to the right column 343. , A ball nut 355 and a common action shaft 364 connects between them. The working shaft 364 is, in order from the left end, a coupling 363 connected to the rotating shaft of the stepping motor 361, a portion connected to the ball nut 325 by a right ball screw 327 located on the right side of the bearing 367, and a screw from the intermediate portion 328. Are connected to a ball nut 355 by a left ball screw 357 having the opposite direction, and are supported by a bearing 371.
[0015]
Now, when the stepping motor 361 rotates in the direction of the arrow in the figure, the ball nut 325 moves to the left by the action of the rotating right ball screw 327, and the roller electrode 301 connected thereto also moves to the left. At the same time, the ball nut 355 moves to the right due to the action of the left ball screw 357, and the roller electrode 331 connected thereto also moves to the right. Therefore, the distance d between the roller electrodes 301 and 331 is increased. Conversely, when the stepping motor 361 rotates in the direction opposite to the direction of the arrow in the figure, the distance d between the roller electrodes 301 and 331 decreases.
[0016]
Regarding the distance between the roller electrodes 301 and 331, the shortest reference distance dimension and the maximum distance are determined by separately prepared gauges, and these dimensions are input and stored in advance in the CPU 21 (see also FIG. 1) that generates the command signal. deep. Then, a control signal corresponding to a necessary electrode interval is generated by the d control unit 17.
[0017]
Next, the configuration of work detection will be described. In FIG. 2, a sensor 302 is mounted on a base plate 501 between roller electrodes 301 and 331 via an arm 304. The sensor 302 includes a light emitting element and a light receiving element, and generates a detection signal when light from the light emitting element reaches the light receiving element, and does not generate a detection signal when light does not reach the light receiving element.
[0018]
FIG. 3 is a diagram showing a positional relationship among a workpiece, a roller electrode, and a sensor. The works 2 are arranged in a line from address 1 to address 6 on the pallet 602. First, as shown in FIG. 3A, there are workpieces 2 arranged continuously on a pallet 602. The distance between the roller electrodes 301 and 331 is increased, and light α is emitted from the sensor 302 above the roller electrodes 301 and 331. The light α is reflected on the surface of the work 2 because of the existence of the work 2, and becomes reflected light β, which impinges on the light receiving element of the sensor 302.
[0019]
The presence signal of the work 2 generated from the sensor 302 is sent to the CPU 21 shown in FIG. A control signal is generated from the CPU 21 via the controller 19 and the d control unit 17 so that the distance between the roller electrodes 301 and 331 is set to a predetermined distance so as to be in contact with the edge of the work 2. At the same time, the operation of lowering the Z axis is performed. That is, a control signal is generated from the CPU 21 via the controller 19 and the Z control unit 15, and the Z-axis elevating mechanism 5 lowers the roller electrodes 301 and 303 so as to contact the edge of the work 2 and perform seam joining. I do. This state is shown in FIG. At this time, first, the roller electrodes 301 and 303 are fixedly pressurized, and a current is applied for a very short time to temporarily fix them at points. Thereafter, the edges of the work 2 are joined linearly by rotating the roller electrodes 301 and 303.
[0020]
Next, as shown in FIG. 3C, when the roller electrodes 301 and 331 come above a place on the pallet 602 where no work exists, the light α emitted from the sensor 302 emits no work and the thickness The reflected light β does not reach the light-receiving element of the sensor 302 effectively because the distance is too long and the reflectance of the surface is different. Therefore, the sensor 302 does not generate a work detection signal.
[0021]
Since there is no work presence signal, the CPU 21 shown in FIG. 1 does not generate a control signal for seam joining and proceeds to the next coordinate.
[0022]
The sensor 302 is always located at the center of the roller electrodes 301 and 331 in the above detecting operation. In addition, the position of each work 2 is such that the center of the work 2 is located directly below the roller electrodes 301 and 331, so that the operation of the sensor 302 is reliable.
[0023]
FIG. 4 is an illustration of the work order of seam joining. First, as shown in FIG. 4A, the work 2 is placed on the pallet 602 in a line from coordinates 1 to 6. Then, from the coordinate 1 to the end of the row, the edge of each long side is brought into contact with the roller electrodes 301 and 331 to perform seam joining.
[0024]
Next, as shown in FIG. 4B, the pallet 602 is rotated by 90 °, and the edges of each long side are brought into contact with the roller electrodes 301 and 331 from the coordinate 1 on the short side of the work 2 sequentially to the end of the row. To perform seam joining. Thus, the rectangular workpieces 2 are sequentially seam-joined. At each coordinate, before the roller electrodes 301 and 331 are brought into contact with the workpiece 2, the workpiece is detected by the sensor 302 and the like as shown in FIG.
[0025]
FIG. 4C shows a case where the work 2 is placed on the coordinates 1 to 3 on the pallet 602 and no work exists after the coordinate 4. In this case as well, the sensor 302 for detecting the work is operated while the long sides are seam-joined by the roller electrodes 301 and 331 one by one. When the long side of the work 2 at the coordinate 3 is completed and the work detection signal cannot be obtained at the coordinate 4, the CPU 21 determines that the following coordinates are empty in that state. Then, a 90 ° turning signal is sent to the table turning mechanism / control section 7.
[0026]
FIG. 4 (d) shows the state after turning 90 °. In this state, from the coordinates 1 to 3, the sensor 302 for detecting the work is sequentially operated while the short sides are seam-joined by the roller electrodes 301 and 331 one by one. When the short side of the work 2 at the coordinate 3 is completed and the work detection signal cannot be obtained at the coordinate 4, the CPU 21 determines that the following coordinates are empty in this state, and the work is completed.
[0027]
Note that when an empty space is detected at a certain coordinate with respect to the workpieces 2 arranged in a line on the pallet 602, the CPU 21 determines that the coordinates thereafter are uniquely empty as described above. However, work detection may be performed for all the coordinates just in case. In addition, the order of operations on the long side and the short side can be freely changed as needed.
[0028]
FIG. 5 shows the work order in the case of the orthogonal array pallet. First, the seam joining operation of the long side of each work 2 is performed from the coordinates 1 to the coordinates 5. Upon detecting that the next coordinate is the empty coordinate, the joining head 3 moves to the coordinate 15, performs seam joining of the long side of the work 2 at the coordinate, and sequentially proceeds to the coordinate 11. Thereafter, seam joining is performed in the same manner from the coordinates 21 to 25 in the next row. Next, at the coordinates 35, it is detected that there is no work, and it is individually detected that any of the following coordinates is empty, or it is determined by data, and the CPU 21 turns the table turning mechanism / controller 7 by 90 °. Send a signal.
[0029]
For each short side, seam joining is performed from coordinate 1 and then proceeds to coordinates 11 and 21. If it is detected that a workpiece is missing at coordinate 31, the process proceeds to coordinates 22. After the short side is seam-joined to the coordinate 25 in the same manner and the absence of the work is detected at the coordinate 35, all the works 2 placed on the pallet 602 are assumed to have been worked on both the long side and the short side.
[0030]
With respect to the symmetric coordinates of the joining work of the respective works 2, the procedure to be advanced can be operated by a procedure previously input to the CPU as appropriate according to the shape and size or occupancy of the pallet 602.
[0031]
As described above, the present invention is characterized by including means for recognizing the presence or absence of a work. As a recognizing means, an optical sensor attached to the joining head is generally used as described in the embodiment, and is suitable for individually detecting all coordinates. However, the recognition means is not limited to the optical sensor. For example, it is possible to adopt a method of directly inputting the existence coordinates of the work to the CPU from the coordinates of the pallet.
[0032]
【The invention's effect】
As described above, the parallel seam welding apparatus according to the present invention is provided with the means for recognizing the presence or absence of an object to be welded. Can be enhanced. This is particularly effective when the workpiece is not fully loaded but is a fraction when placed on a pallet.
[Brief description of the drawings]
FIG. 1 shows a system diagram of an embodiment of a parallel seam joining apparatus according to the present invention.
FIG. 2 shows an embodiment of a joining head in the parallel seam joining apparatus according to the present invention.
FIG. 3 shows a positional relationship among a workpiece, a roller electrode, and a sensor in an embodiment of the parallel seam joining apparatus according to the present invention.
FIG. 4 is an illustration of a work order in an embodiment of the parallel seam joining method according to the present invention.
FIG. 5 shows an operation sequence in the case of an orthogonal array pallet in an embodiment of the parallel seam joining method according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Parallel seam joining apparatus 2 ... Work 3 ... Joining head 5 ... Z-axis elevating mechanism 6 ... Table 7 ... Table turning mechanism / controller 8 ... X-axis moving mechanism 9 ... Y-axis advancing mechanism 10 ... Joining power supply 11 ... Y control Unit 13 X control unit 15 Z control unit 17 d control unit 19 Controller 21 CPU 23 Touch panel display 25 Floppy disk 301 Roller electrode 302 Sensor 303 Electrode holder 304 Arm 305 Power supply shaft 307 Arms 309, 311 Slider 312 Guide 313 Column 315 Arm 317 Shaft 319 Disk 321 Coil spring 323 Flange 325 Nut 327 Right ball screw 331 Roller electrode 333 Electrode holder 335 Power supply shaft 337 Arm 339 , 341… Sly Da 342 Guide 343 Column 345 Arm 347 Shaft 349 Disk 351 Coil spring 353 Flange 355 Nut 357 Left ball screw 360 Yoke 361 Stepping motor 363 Coupling 365 Yoke 367 Bearing 369 Yoke 371 Bearing 373, 375 Slider 377 Guide 501 Base plate 503 Sliding horizontal hole 505 Eccentric shaft 507 Crank 509 Rotation shaft 511 Deceleration motor 513 Bracket 515, 517 Guide 519, 521, 523, 525 Slider 602 ... Pallet

Claims (3)

An envelope containing a predetermined circuit element or an electronic circuit and a lid member are used as objects to be joined, and the object to be joined placed on the same plane along the X-axis and the Y-axis of the pallet is rotated while being pressed. a pair of bonding electrodes to the dynamic, the bonding head having a sensor the bonding electrode and the object to be bonded to said pallet to recognize whether or not there, the pair of the bonding electrodes of said pallet Y A parallel seam joining apparatus comprising: a Y-axis moving mechanism that moves along an axis; and a joining power supply that supplies current to the pair of joining electrodes .
When detecting the object to be joined by the sensor, the interval between the pair of joining electrodes is widened, and when joining the object to be joined, the interval between the pair of joining electrodes is brought into contact with the edge of the object to be joined. A parallel seam joining apparatus characterized by adjusting to a distance . An envelope containing a predetermined circuit element or an electronic circuit and a lid member are used as objects to be joined, and the object to be joined placed on the same plane along the X-axis and the Y-axis of the pallet is rotated while being pressed. a pair of bonding electrodes to the dynamic, the bonding head having a sensor the bonding electrode and the object to be bonded to said pallet to recognize whether or not there, the pair of the bonding electrodes of said pallet Y A parallel seam joining apparatus comprising: a Y-axis moving mechanism that moves along an axis; and a joining power supply that supplies current to the pair of joining electrodes .
The parallel seam joining apparatus , wherein the sensor is located substantially at the center of the pair of joining electrodes, and moves up and down together with the up and down movement of the pair of joining electrodes . A rectangular envelope containing a predetermined circuit element or an electronic circuit and a lid member are used as objects to be joined, and the object to be joined placed on the same plane along the X axis and the Y axis of the pallet is pressed. A joining head having a pair of joining electrodes rotating while rotating, a joining electrode and a sensor for recognizing whether or not the article to be joined exists on the pallet, and the pair of joining electrodes being attached to the pallet. A parallel seam joining method for joining the workpieces by a parallel seam joining apparatus including a Y-axis moving mechanism that moves along the Y-axis and a joining power supply that supplies current to the pair of joining electrodes.
(1) Before the joining electrode comes into contact with the joining object, the presence / absence of the joining object is detected by the sensor that moves together with the joining electrode. Proceeding to the step (2), when the article is not present, proceeding to the next coordinate to detect whether or not the article is present;
(2) a step of fixing and pressurizing the pair of bonding electrodes, applying a current for a very short time, and temporarily attaching the electrodes;
(3) a step of rotating the pair of joining electrodes while applying pressure to join sides of the article to be joined in the Y-axis direction;
(4) moving the joining head by a unit coordinate in the Y-axis direction of the pallet;
(5) repeating the steps (1) to (4);
(6) When the sensor detects that the article to be bonded does not exist in the same row of coordinates, or that the seam joining in the Y-axis direction of the article to be positioned at the final coordinate is completed. when the a step of 90 ° turning of the pallet,
(7) a step of repeating the above steps (1) to (4);
A parallel seam joining method characterized by comprising:

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