JP2002321063A - Resistance welding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a process cycle of an automatic resistance welding device which manufactures parts by automatically supplying materials to be welded to a welding electrode. SOLUTION: An upper member is taken out and turned round by a clamper 10 and positioned to a welding electrode 1 by a guide member 5 and a slider 6. A lower member is taken out by a clamper 17 and conveyed to a welding electrode 2 by a slider 12 and a guide member 11. A handler 15 is turned round to clamp a part, whose previous process welding on the welding electrode 2 is completed, by a clamper 16, and then turned round to position the lower member to the welding electrode 2. The above process is carried out independently to shorten the process. The lower member is placed in a vacant space above a tray 18 by the handler 15 after welding, and thus a supply tray for lower members and a part containing tray are shared to save space.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resistance welding apparatus, and more particularly to an automatic resistance welding apparatus for manufacturing parts by welding members.

[0002]

2. Description of the Related Art Conventionally, there is a turntable type resistance welding apparatus for automatically supplying a workpiece to a welding electrode and manufacturing parts. As an example, there is known an automatic welding apparatus for manufacturing parts by resistance-welding a lower member and an upper member mainly made of a metal in an inert gas atmosphere having a high degree of cleanliness in semiconductor element manufacturing. In these devices, it is necessary to perform stable automatic operation. The operation is to sequentially supply the lower member, which is carried into the device installation place in the member tray, to a plurality of lower welding electrodes on the turntable rotating at a constant speed, and to supply the upper member to the upper welding electrode, The objects to be welded are aligned with each other, welded in that state, the completed part is carried out from the welding electrode, and stored in the component storage tray for the completed part.

[0003]

The above-described apparatus has an advantage that the speed can be increased because the supply position and the take-out position of the workpiece are different. However, since the lower welding electrode is located on the turntable, the workpiece is not covered. There has been a problem that the accuracy of positioning between welded objects cannot be increased, and high-quality welding results cannot be obtained. Further, in the above-described apparatus, since the members before welding and the parts after welding are separately stored, there is a problem that the number of storage trays is increased and the cost is increased. Required, and a special facility becomes large when an inert gas atmosphere with a high degree of cleanliness is required, or when such an atmosphere is created in the welding equipment, the entire equipment becomes large and the equipment cost increases. There was a problem. Further, all of the above-mentioned problems have been accompanied by a problem that the component manufacturing cost of the above-described apparatus is high.

Therefore, an object of the present invention is to solve the above problems. That is, after solving the conventional problems by using a fixed welding electrode in the horizontal direction, reduce the number of steps compared to the conventional technology employing such a mechanism,
Another object of the present invention is to provide a device that can be shortened, and to provide a device that can relatively shorten a process cycle as a whole. Alternatively, it is possible to provide an apparatus in which a member supply tray and a component storage tray can be used in combination, to reduce the number of necessary trays, and to provide an apparatus that requires a relatively small size or installation place. Aim. It is still another object of the present invention to provide an apparatus which achieves one of the above-mentioned objects, and as a result, costs for manufacturing parts are reduced.

[0005]

The present invention solves any of the above-mentioned problems. For this purpose, in the apparatus according to the first aspect, the upper member and the lower member to be welded to each other are provided with first and second transfer means, respectively, and are transferred to the welding electrode. Each of the transporting means includes a take-out and holding mechanism for taking out and holding a member or a component and releasing the holding, and a moving means for moving. Therefore, since each member can be conveyed to each welding electrode by each convey means and arranged independently, the process can be shortened.

Further, when the lower member is conveyed to the welding electrode, the one conveying means (second conveying means) finishes the welding in the previous process and remains on the welding electrode while holding the lower member. A means is provided for collecting and holding the welded parts. Therefore, the lower member to be welded in the next process is transported to the welding electrode, the welded part of the previous process existing on the welding electrode is collected, and the lower member to be welded in the next process is held while holding it. Since it can be positioned at the welding electrode and transported to the place where the welded part is to be stored, a means for collecting the welded part and storing it at a predetermined place is provided.
One transfer means can be used. Further, the reciprocation of the transport can be used as a member supplying step and a part collecting step, and the number of empty transport steps can be reduced.

[0007] Further, the transfer means is provided so as to be capable of performing position control necessary for positioning the member on the welding electrode.
That is, the lower member and the upper member are positioned with respect to the respective welding electrodes by the above-described transporting means, and are suction-clamped to the welding electrodes as they are, so that the lower member and the upper member are relatively positioned. Therefore, it is possible to reduce the number of steps of performing welding alignment after arranging members or components.

Here, the lower member and the upper member are not necessarily expressions in actual use, but the main member which is clamped to the fixed-side welding electrode due to its shape and function is called a lower member, The additional member that is clamped to the electrode is called the upper member. For example, in an automatic welding device for semiconductor elements, which is one of the application fields of the present invention, a base member or a stem member on which a lead wire for attaching to a printed board and a semiconductor element are formed is a lower member, a semiconductor element. The cap member that protects and seals is referred to as an upper member.

The lower member and the upper member are in a relationship of parts to the product as long as the form after welding is a product of some kind. However, in this specification, for the sake of explanation, the modes before and after welding are distinguished. For this reason, only the welded product will be referred to as a part. Unless there is a risk of misunderstanding, simply referring to a member means a lower member or an upper member, or both.

Next, in the apparatus according to the second aspect, a lower member supply means, an upper member supply means, and a component storage means for a welded part are further added to the configuration of the first aspect. That is, in the resistance welding apparatus of the first aspect, the lower member / upper member supply means is independent of the resistance welding apparatus, but there is a difference that the apparatus of the second aspect is built in the apparatus. Therefore, at least the same problems as those of the device of claim 1 can be solved. Further, since the lower member / upper member supply means is incorporated, the overall size of the resistance welding device and the component supply device when viewed as a system can be reduced.
In addition, an inert gas atmosphere having a high degree of cleanliness can be created inside the apparatus, and equipment at a separate house is not required, and equipment costs can be reduced.

Next, in the apparatus according to the third aspect, the first aspect is provided.
In the apparatus of (2), the take-out and holding mechanism of the second transport means is configured as direction regulating means capable of integrally holding the member and the component and changing the direction of the held member or component to a predetermined direction. The members and components are moved by moving the direction regulating means. Therefore, at least the same object as that of claim 1 or 2 can be solved.

According to a fourth aspect of the present invention, in the third aspect of the present invention, at least two holding portions of the direction regulating means are arranged so as to face each other on the same straight line, and one of the holding portions is positioned on a straight line therebetween. A pivot point is provided. The direction restricting means is configured to be rotatable about a rotation fulcrum so as to be aligned in the alignment direction of the first and second welding electrodes.

Further, the direction restricting means is configured to be capable of reversing the position about the rotation fulcrum from the state where it is positioned in the predetermined direction. That is, the same state as the rotation of 180 degrees about the rotation fulcrum is enabled. As a result of this configuration, by arranging the components and the components in the same direction, the components can be arranged and the components can be taken out only by one inversion operation, and the components can be taken out and welded by a simple mechanism. The arrangement of the electrodes can be switched, and as a result, the number of steps can be reduced.

Next, in the apparatus according to a fifth aspect, in the apparatus according to the second, third or fourth aspect, the lower member supply means and the component storage means are configured to be common. Therefore, at least the same objects as those of the device according to claim 2, 3 or 4 can be solved. Further, in this configuration, since the component storage means is shared with the lower member storage means, the operation of the second transfer means is performed so that the parts after welding are stored in an empty space generated by removing the lower member from the lower member storage means. Can be performed. Therefore, in the cycle in which the lower member is taken out and the parts of the previous process are stored, the transport path taken by the second transport means is exactly the same, and the lower member to be taken out in the next process is almost immediately after storing the components. Since it can be taken out from the position, almost unnecessary operation can be eliminated in this step. Further, the lower member supply means and the component storage means, that is, the lower member supply tray and the component supply tray which have been separately provided in the related art can be integrated into one.

Next, in the apparatus according to claim 6, the lower member / upper member supply means and the component storage means position and place the tray member on the table member, and the table member can be displaced with respect to the respective transport means. It was configured as follows. With this configuration, at least the same problem as that of the device according to the second, third, fourth, or fifth aspect can be solved. Further, in this configuration, since the positions of the members and components can be relatively displaced with respect to the transporting means, first, the moving mechanism of the transporting means can be simplified, and
In addition, while the transporting means is operating, the table member is operated to cooperate with the transporting means in taking out the members or storing the components, thereby realizing an optimum relative positional relationship. Therefore, as a whole, the time required for transporting members and components can be reduced, and the number of steps can be reduced.

[0016]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view showing an embodiment of a resistance welding apparatus according to the present invention, and schematically shows a configuration. FIG. 2 is a perspective view showing the operation of the apparatus. FIG. 3 is a sectional view showing the configuration of a fixed welding electrode portion B (second welding electrode) in the device.

The apparatus shown in FIG. 1 is a resistance welding apparatus provided with a pair of welding electrodes 1 and 2. The configuration and operation of the main parts involved in welding are the same as in a conventional resistance welding apparatus.

The configuration of the apparatus shown in FIG. 1 mainly includes a welding electrode pressing mechanism A (first welding electrode) and a fixed welding electrode section B (second welding electrode).
, The upper member supply means E, the lower member supply means F,
It comprises a first transport means C and a second transport means D. In this apparatus, the take-out positions of the lower member and the upper member, and the positions of the first and second welding electrodes are within one vertical plane (ZX in the figure).
(Within a plane). The detailed configuration of each will be described below, and then the operation of the present apparatus will be described with reference to FIG.

The fixed welding electrode portion B (second welding electrode)
Welding electrode 2 (not shown in FIG. 1), slide members 27a and 27b movable on support table 31 in the Y direction, and clamp means 2 attached to slide members 27a and 27b
8a and 28b. FIG. 3 shows that the lower member is a welding electrode 2
The state fixed above is shown as a cross section in the YZ plane. The welding electrode 2 has a hole shape for holding and fixing the lower member with the surface to be welded of the lower member facing vertically upward (upward in the Z direction). The shape of the hole allows the lower member to be held in the Z direction against the pressing force from the welding electrode 1 by the welding electrode pressing mechanism A during welding of the lower member. The hole shape is large enough to ensure the area of the receiving surface for allowing an appropriate welding current to flow, and to escape the projections of the lower member or the parts that should not come into contact with the welding electrode. Further, the suction hole 33 is provided in the fixing hole.
The lower member can be sucked and fixed by a vacuum suction mechanism (not shown). Further, the clamping means 2 fixed to the slide members 27a and 27b, respectively.
8a and 28b are provided with a shape for accurately clamping the outer shape of the lower member in the XY directions.

Next, the welding electrode pressurizing mechanism A (first welding electrode) is provided with a welding electrode 1 having an upper member fixing hole (not shown) provided at the end thereof, and the welding surface is directed vertically downward (downward in the Z direction).
Can be fixed by suction. Furthermore, welding electrode 1
Is provided at the tip of a guide rod 29 driven by the electrode pressing drive unit 3 supported by the support member 4, and is movable in the vertical direction (Z direction).

Next, the present apparatus is provided with a first transfer means C for transferring the upper member from the member transfer position to the welding electrode 1. The first transport means C includes a guide member 5 fixed to the apparatus by a support member (not shown), a slider 6 movably attached to the guide member 5 in the X direction, and a Z
A support member 8 movably attached in the direction, a clamper 10 rotatably mounted about a rotation fulcrum 9a with respect to the support member 8, and capable of taking out and holding the upper member by suction.
And a control unit for controlling movement or rotation of each of them.

The guide member 5, the slider 6, the support member 8, and the respective slider driving units are moving means for moving the handler 9 in the X and Z directions. Clamper 10 and pivot 9a
The handler 9 provided with the above constitutes a direction regulating means for taking out the upper member by the clamper 10 and reversing the direction in the direction of attachment to the welding electrode 1.

The guide member 5 and the slider 6 are configured to drive and control a slide base supported by a lubricated slide guide which can realize precise position control relatively inexpensively with a ball screw and a servomotor. In addition, as long as the sliding guide can move in a straight line, the sliding guide may be a guide by a rolling bearing, or may be a non-lubricated one such as an air slider. The driving method may be stepping motor driving or linear motor driving, or pressure control driving of a hydraulic or pneumatic cylinder. The position detection used for control is
For example, various existing technologies such as those using a rotary encoder or a linear encoder or those using a laser displacement sensor can be used.

Further, the moving means may use, for example, an articulated robot arm other than the combination of the linear motions.

The handler 9 and the clamper 10 are direction regulating means. In the apparatus shown in FIG. 1, the upper member is held by the clamper 10, the upper member is positioned in the Z direction, and the rotation fulcrum 9a is provided.
Is rotated in the ZX plane around the center, and the position of the upper member can be reversed. As a mechanism for holding the chuck, a chuck mechanism applying electromagnetic force or hydraulic or pneumatic pressure, electromagnetic suction, vacuum suction, or the like can be adopted according to the strength and material of the upper member. Further, as the reversing means of the handler 9, a 180-degree rotation by controlling a stepping motor, a mechanism using a cam, a mechanism for locking the rotation using a clutch or a ratchet, a mechanism using a combination of a spring and a solenoid, and the like can be adopted.

Next, the present apparatus is provided with a second transfer means D for transferring the lower member from the member transfer position to the welding electrode 2. The second transporting means D includes a guide member 11 fixed to the apparatus by a support member (not shown), a slider 12 movably attached to the guide member 11 in the X direction, and an movably attached Z direction to the slider 12. Support member 1
4. a handler 15 having clampers 16 and 17 which are rotatably mounted on the support member 14 about a rotation fulcrum 15a and which can take out and hold the lower member, and for controlling the movement or rotation of each of them. Control section. First
The only difference from the transfer means is that there are two clampers that can be driven independently, and the above description applies to specific means.

The lower member supply means F for supplying the lower member to the member transfer position includes a tray 18 for storing the lower member, and a table 19 on which the tray 18 is placed by a positioning means (not shown). The table 19 is fixed to a guide member 20, and is moved by a slider drive unit 30 in a direction perpendicular to the plane on which the second transport unit D moves, that is, ZX in FIG.
Since it is driven in the Y direction with respect to the plane, it can be relatively displaced in the Y direction with respect to the second transport means D (claim 6). The guide member 20 can employ the same mechanism as the other guide members described above. Further, the tray 18 is formed with a recess in accordance with a shape in which the lower member to be welded can be aligned and housed, and the part after welding can be housed,
It can also serve as component storage means (claims 5 and 6).
Further, the tray 18 is positioned and placed on the table 19. Although not shown, a mechanism such as fitting by a positioning member or abutment against a reference surface can be adopted as the mechanism. The material of the tray 18 can be metal, paper, synthetic resin, or the like. Further, when it is necessary to protect the lower members and components from static electricity, it is desirable to carry out antistatic treatment or to use a material having a certain degree of conductivity, and it is more effective to be grounded. The tray may be called a pallet or a tape, but is called a tray here.

In this apparatus, an example in which the lower member supply means F and the component storage means can be most effectively used is shown. However, even if they are different means, they are placed close to each other. Can achieve some purpose.

The upper member supply means E for supplying the upper member to the member transfer position includes a tray 21 for storing the upper member,
It comprises a table 22 on which a tray 21 is placed by a positioning means (not shown). The table 22 is fixed to the guide member 23, and is driven by the slider driving unit 24 in a direction perpendicular to the plane on which the first transport unit C moves, that is, in the Y direction with respect to the ZX plane in FIG. It is relatively displaceable in the Y direction with respect to one transport means (claim 6). Regarding the mechanism and material of the guide member 23 and the tray 21, the same means as those of the guide member 20 and the tray 18 can be adopted, respectively.

Next, the operation of the resistance welding apparatus according to the present invention will be described with reference to FIG. FIG. 2A shows the clamper 17.
Shows a state where the lower member to be welded and the upper member to be welded by the clamper 10 are taken out from the tray 18 and the tray 21 and held. The lower member of the tray 18 is XY in the figure.
The damper 17 is moved in the X direction by the guide member 11, and the table 19 is moved in the Y direction, whereby the clamper 17 is positioned on the lower member at an arbitrary position on the tray 18, and the slider 12 is moved. Move in the Z direction,
The clamper 17 descends on the lower member, and a vacuum suction mechanism of the clamper 17 acts to suck and take out and hold the lower member. Since the movements in the X, Y, and Z directions are configured to be performed independently, they can operate simultaneously to efficiently remove the lower member. Similarly, the clamper 10 sucks, takes out, and holds the upper member at an arbitrary position on the tray 21. This operation can also be performed independently of the clamper 17 since the moving mechanism is independent. At this time, the welding electrode 1 is retracted upward as shown in the figure.

FIG. 2 (b) shows a state in which the conveying means C and D respectively hold the members at predetermined positions of the welding electrodes 1 and 2. The welding electrode 1 is retracted to a position between the welding electrode 1 and the welding electrode 2 at an interval where the respective handlers 9 and 15 can enter as shown in the figure. Since D does not interfere with each other, the lower member and the upper member can be independently conveyed.

By the time the state shown in FIG.
The clampers 10 and 17 use the upper member and the lower member as trays 21 and 1.
8, while being transported in the X direction so as to be aligned with the welding electrodes 1 and 2 in the Z direction, the handler 9 inverts the clamper 10 to position the upper member on the welding electrode 1. Do. During the same period, if a part that has been welded remains on the welding electrode 2 in the previous process, the handler 15 performs an inverting operation while clamping the lower member on the clamper 17 to move the clamper 16 to the welding electrode 2. , The handler 15 is moved downward in the Z direction, the clamped parts are clamped by the clamper 16, and the parts are lifted upward in the Z direction.
By performing a reversing operation, the lower member clamped by the clamper 17 is directed toward the welding electrode 2, moved downward in the Z direction, and positioned at a predetermined position of the welding electrode 2. If no welded part remains on the welding electrode 2 in the previous step, the clamper 17 is immediately moved downward in the Z direction to be positioned at a predetermined position on the welding electrode 2.

When each member is placed on each welding electrode, it is clamped to the welding electrode by the above-mentioned suction mechanism until welding is completed. Then, each clamper releases the holding of the member, moves the clamper 10 upward in the Z direction, moves the clamper 17 downward in the Z direction, and retreats. Evacuation so as not to interfere with the movement range of.

Here, the positional relationship between the welding electrodes 1 and 2 is X, Y
The direction is constant. The positioning of the upper member of the welding electrode 1 in the X and Y directions is realized by suction-clamping and fixing the position transferred by the first transfer means to the welding electrode 1 as it is. Therefore, in the present apparatus, the positioning accuracy of the first transport unit is designed in consideration of the allowable position setting accuracy of the upper member. With such a configuration, there is an advantage that when manufacturing a part in which the shape of the upper member is changed, it can be easily coped with by changing the target position of the conveying means.

As for the welding electrode 2, the lower member placed in the fixing hole of the welding electrode 2 shown in FIG.
8b and clamp it from both sides. Clamping means 2
8a and 28b are supported by slide members 27a and 27b, respectively, which move together as the slide members 27a and 27b move in the Y direction to clamp and release the lower member. Here, the clamping means 28a and 28
The clamping action b prevents the lower member from shifting due to the force generated by the welding current flowing during welding. Incidentally, these welding electrodes may have a normal collet chuck structure using a split type electrode which performs a diameter increasing operation and a diameter reducing operation. In this case, there is no need for a means for separately performing a clamping action.

Next, FIG. 2C shows a state where resistance welding is being performed. First, when the guide rod 29 driven by the electrode pressing drive unit 3 (not shown) moves downward in the Z direction, the welding electrode 1 clamping the upper member moves downward in the Z direction and is clamped by the welding electrode 2. The lower member and the welded portion are abutted, and each lower member is pressed. A welding current is applied at the timing when the predetermined pressure is reached, and resistance welding is performed.

When the welding is completed, the welding electrode 1 moves upward in the Z direction and returns to the position shown in FIG. During this time, the first transporting means C moves in the X direction to take out the upper member to be welded next, and by that time, the handler 9 is turned over to change the direction of the clamper 10 and return to the direction in which the upper member is taken out. . The operation of the second conveying means D is also the same, so that in order to take out the lower member to be welded next, it moves in the X direction, returns to the position of the empty space of the tray 18, and moves the handler 15 downward in the Z direction. Then, the parts which are welded in the previous process and clamped to the clamper 16 are stored. Then, the clamp is released and the handler 15 is turned upside down once, the guide member 11 and the table 19 are independently driven in the X and Y directions, respectively, and the clamper 17 is moved in the next welding. To the transfer position of the lower member for transfer.

When the second conveying means D stores the parts, which have been welded in the previous step, in the empty space of the tray 18, if they are returned to the same position as the lower member used for the previous welding, The transfer operation in the process and the transfer path for returning the welded parts are exactly the same, and except for the first step, there is no empty transfer path and the control of the transfer operation is simplified.

In the apparatus shown in FIGS.
Is provided with only one clamper 10, because if at least one clamper 10 is provided, the above operation can be performed. Similar to the second transport unit D, two clampers having the same structure may be provided. In this case, any of the clampers can take out the upper member. For example,
If a clamper having the same structure is provided at a position symmetrical to the clamper 10 with respect to the rotation fulcrum 9a, the clamper having the same structure always comes to the same position every time the handler 9 is inverted. The number of operations can be reduced, which has the effect of reducing the inversion step.

The clamper 1 provided in the handler 15
If the components 6 and 17 are configured so that both the lower member and the components can be clamped, after the components are stored in the tray 18, the handler 1
Since it is not necessary to invert the handler 5, the number of steps for inverting the handler 9 can be reduced, and the time can be further reduced.

In the apparatus shown in FIGS.
Clamper 1 disposed on a straight line including the rotation fulcrum 15a
Although an example in which the clampers 6 and 17 are provided has been described, the clampers 16 and 17 may be provided on straight lines extending at an acute angle from the rotation fulcrum 15a. In this case, the switching of each clamper position is performed by rotating the handler 15 by the angle made by the same, and the means can adopt the same angle changing method as described above, except that the target is not 180 degrees. In such a configuration, since the moving angle is small, the control and the mechanism realizing method are different from the reversing operation, but there is an advantage that the position can be switched in a relatively short time.

When the first and second transfer means are realized as articulated robot arms, an operation corresponding to the reversal or rotation of the handlers 9 and 15 may be realized as an operation of the robot joint.

Here, in the apparatus shown in FIGS.
9 and 22 are movable in the Y direction, but the tables 19 and 22 may be fixed by providing the first and second transporting means with a moving means in the Y direction. In this case, even if the storage capacity of the tray is increased and a large tray is adopted, it is not necessary to have an operation area for moving the tray in the apparatus. This has the effect of making the overall size relatively small.

The tables 19 and 22 correspond to the first and second
If the transfer means is relatively displaceable, the transfer path can be shortened or simplified, and the moving direction is not limited to the Y direction as in the apparatus shown in FIGS.
For example, if it is possible to move in the X- and Y-axis directions, it is possible to fix the delivery position of the member or component to one location in space. In this case, since the moving operation of each transporting means becomes extremely simple, as long as the starting point and the ending point are accurately determined, the moving means whose intermediate position and speed are not necessarily strictly controlled can be adopted. For example, means for moving between two points by air pressure without speed control can be adopted without any problem, and there is an effect that equipment cost can be reduced.

Further, the lower member / upper member supply means and the component storage means are arranged in a one-dimensional tray, not in a tray in which members / components are arranged two-dimensionally, and have a conveyor-like configuration for conveying in the Y direction. Can also. In this case, the projection area can be reduced as compared with a two-dimensional tray, and the apparatus can be made smaller.

[0046]

As described above, claim 1 or claim 2
According to the invention described in (1), the upper member and the lower member can be transported to the welding electrodes 1 and 2 by the first and second transport means, respectively, and can be arranged, and their operations can be located independently. Therefore, it is possible to provide an apparatus capable of reducing the number of steps as compared with the case where each step is sequentially performed.

Further, the means for collecting the welded parts and storing them in a predetermined place can be combined with one transfer means, and the reciprocation of the transfer is utilized as a member supplying step and a part collecting step. And an apparatus capable of reducing the number of empty conveyance steps can be provided.

Further, since the upper member and the lower member are arranged so as to be positioned relative to the welding electrodes when the upper and lower members are positioned at the welding electrodes 1 and 2, respectively, the members are aligned before the welding electrodes are pressurized. In addition, it is possible to provide a device that can prevent the members from being displaced by the force generated when the welding current flows, at the same time.

According to the second aspect of the present invention, since the lower member / upper member supply means is incorporated, the overall size can be reduced, and the inert gas having a high degree of cleanliness inside the apparatus. It is possible to provide a device that can create an atmosphere, does not require facilities in a separate house, and can reduce facility costs.

According to the third aspect of the present invention, it is possible to provide a device which can use a common conveying path for members and components and only requires two conveying means.

According to the fourth aspect of the present invention, since the position of the direction regulating means can be reversed around the rotation fulcrum from the state where the direction regulating means is located in the predetermined direction, the arrangement direction of the members and components can be changed. By making them the same, it is possible to dispose the component and take out the component with only one reversing operation, and it is possible to take out the component and switch the disposition of the component to the welding electrode by a simple mechanism. Can be provided.

Next, in the apparatus according to the fifth aspect, since the lower member supply means and the component storage means are configured to be common, the parts after welding are stored in an empty space formed by removing the lower member from the lower member storage means. Thus, the operation of the second transport unit can be performed. Therefore, in the cycle in which the lower member is taken out and the parts of the previous process are stored, the transport path taken by the second transport means is exactly the same, and the member to be taken out in the next process is almost always the position immediately after storing the components. Can be taken out of this step, almost unnecessary operation can be eliminated in this step. In addition, a single lower member supply tray and component supply tray can be used, so that an apparatus can be provided which requires a small space and a relatively small apparatus size.

Next, in the apparatus according to the sixth aspect, since the positions of the members and components can be displaced relative to the conveying means, first, the moving mechanism of the conveying means can be simplified, and
In addition, while the transporting means is operating, the table member is operated, and it is possible to realize the optimal relative positional relationship in cooperation with the transporting means when removing the member or storing the parts. Therefore, as a whole, the time required for transporting members and components can be reduced, and the number of steps can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a resistance welding apparatus according to the present invention.

FIG. 2 is a perspective view showing the operation of the resistance welding apparatus according to the present invention.

FIG. 3 is a sectional view showing a configuration of a fixed welding electrode B (second welding electrode) in the resistance welding apparatus according to the present invention.

[Explanation of symbols]

 A welding electrode pressurizing mechanism (first welding electrode) B fixed welding electrode section (second welding electrode) C first transport means D second transport means E upper member supply means F lower member supply means 1, 2 Welding electrode 5, 11, 20, 23 Guide member 6, 12 Slider 7, 13, 24, 30 Slider drive unit 9, 15 Handler 9a, 15a Rotating fulcrum 10, 16, 17 Clamper 8, 14, Support member 18, 21 Tray 19, 22 Table 29 Guide rod

Continuation of front page (72) Inventor Kiyoshi Takashina 1-18-1 Takada, Toshima-ku, Tokyo Origin Electric Co., Ltd. F term (reference) 4E065 CA02 CA06

Claims (6)

[Claims] 1. A resistance welding apparatus for manufacturing a part by welding a lower member and an upper member each placed at a predetermined position, wherein the first conveying means conveys the upper member to a first welding electrode. And second conveying means for conveying the lower member to a second welding electrode, wherein the second conveying means holds the lower member while welding the second member to the second welding electrode. A resistance welding apparatus for collecting and holding finished parts, positioning the lower member at the second welding electrode, and transporting the collected and held welded parts. 2. A resistance welding apparatus for manufacturing a part by welding a lower member and an upper member to each other, comprising: a lower member supply unit for supplying the lower member to a member delivery position; An upper member supply unit that supplies the upper member to the first welding electrode, a component storage unit that stores a component obtained by welding the lower member and the upper member, and a first transport unit that transports the upper member from the member transfer position to the first welding electrode. And a second transport unit that transports the lower member from the member transfer position to a second welding electrode, wherein the second transport unit holds the lower member while holding the lower member. Resistance welding wherein the clamped and welded parts are collected and held, the lower member is positioned at the second welding electrode, and the collected and held welded parts are transported to the parts storage means. apparatus. 3. The resistance welding apparatus according to claim 1, wherein the second transporting means is capable of integrally holding the lower member and the welded part, and the held lower member or A resistance welding apparatus comprising: a direction restricting means for restricting the direction of a welded part so as to face a predetermined direction; and a moving means for moving the direction restricting means. 4. The resistance welding apparatus according to claim 3, wherein the direction regulating means includes a rotation fulcrum and a reversing means for reversing a position of the held lower member and a welded part, and the lower member. The direction of removal and storage in the upper member supply means and the part storage means coincides with the alignment direction of the first and second welding electrodes, and the direction is defined as the predetermined direction, and the held lower member or A resistance welding apparatus characterized by reversing a welded part. 5. The resistance welding apparatus according to claim 2, wherein the lower member supply unit and the component storage unit that stores the welded component, which are transported by the second transport unit,
A resistance welding apparatus, which is a common means. 6. The resistance welding apparatus according to claim 2, 3, 4, or 5, wherein the upper member supply unit, the lower member supply unit, and the component storage unit for the welded component are each provided with a tray member and the component. A resistance welding apparatus comprising a table member on which each tray member is placed at a predetermined position and which can be relatively displaced with respect to the first or second transport means.