KR102547495B1 - Servo-actuated microspot welding machine with structual integrity for eccentricity - Google Patents

Abstract

The present invention relates to a non-eccentric servo pressure type micro spot welder. By using the present invention, a stroke of a movable electrode tip can be increased, and at the same time, can be raised and lowered more stably. The movable electrode tip is located on the same axis as a lifting ball screw of a driving part so that more accurate spot welding can be performed without eccentricity. Thus, objects to be welded with low height and even objects to be welded with high height can be welded. In addition, manufacturing costs can be reduced with a simple configuration. The non-eccentric servo pressure type micro spot welder comprises a base member, a body member, a driving part, a moving part, and a movable electrode part.

Description

Servo-actuated microspot welding machine with structural integrity for eccentricity}

The present invention relates to a non-eccentric servo pressure type micro spot welding machine in which a movable electrode tip is positioned on the same axis as a lifting ball screw of a drive unit and enables more accurate spot welding without being eccentric, and more particularly, the stroke of the movable electrode tip It can be enlarged and raised and lowered more stably at the same time, and by configuring a micro spot welding machine with a simple configuration, it is possible to weld not only low-height welded objects but also high-height welded objects. It relates to a non-eccentric servo pressure type micro spot welding machine that can lower the manufacturing cost with a simple configuration.

As is well known, high-precision micro spot welding machines are widely used for fine spot welding of, for example, thermocouple application instruments, micro electrical contacts, electrode parts of batteries or LCD window connections of mobile phones, and single spot welding (single spot welding). When used for spot welding), spot welding is performed with one movable electrode tip that moves up and down and a fixed electrode tip located below the movable electrode tip corresponding to the movable electrode tip, and when used for multiple spot welding, Spot welding is performed by employing a plurality of movable electrode tips arranged side by side with each other.

The conventional micro spot welding machine described above was designed to perform spot welding while holding the movable electrode tip at the tip of the tip holder extending vertically forward from the pressure shaft, which is the separation distance between the movable electrode tip and the pressure shaft. Correspondingly, bending stress is generated in the tip holder, so that the pressing force from the pressing shaft portion cannot be precisely transmitted to the movable electrode tip.

In addition, the conventional micro spot welding machine described above does not have a jig guide groove on its base or has a jig guide groove extending in the longitudinal direction toward the support of the frame, so that the jig to be welded is fixed and moves along the jig guide groove. It was intended to perform continuous spot welding during

However, this structure has a problem in that the movement distance of the jig is limited by the support.

In view of this point, a high-precision micro spot welding machine has been proposed in Patent Application No. 10-2003-0078063.

Looking at the conventional high-precision micro spot welding machine, a frame, a base of a horizontal structure on which a jig supporting a workpiece to be welded is placed, a driving unit installed in the head of the frame, and a driving unit extending downward toward the base and moving up and down by the driving unit A movable pressure shaft part, at least one movable electrode tip means which is detachably installed at the lower end of the pressure shaft part and is pressed toward the object to be welded on the base by the descent of the pressure shaft part, and the movable electrode tip means In the spot welding apparatus including resistance generating means for generating electric resistance heat by energizing the workpiece and the movable electrode tip means when pressure is applied to the welded object, the movable electrode tip means is electrically insulated from the pressure shaft portion and A tip holder having a central region through which a central axis of the pressing shaft portion passes, and a movable electrode tip fixed to the central region of the tip holder with a front end facing the base, wherein the pressing shaft portion holds the tip holder at its lower end. and a pair of pressurizing shafts provided parallel to each other with the central axis at the center at the upper part of the holder holder, wherein the holder holder is electrically insulated from the movable electrode tip means. An electrical insulating member is provided at its lower end, and a concave opening corresponding to the central region of the tip holder is formed so that the movable electrode tip extends upward, and the frame supports the head portion. It has a post upright on the base, and the head part is integrally provided with a head guide that slides along the sliding area of the post whose range is limited by two steps, and the height is adjusted by the head guide. , It is characterized in that formed to be fixed to the holding by a fixing screw.

However, the conventional high-precision micro spot welding machine configured as described above is equipped with a guide fixing block for guiding a pair of pressure shafts at the front lower part of the head part, so that the stroke of the movable electrode tip means is inevitably limited, so that the height is high. There is a disadvantage in that there are many difficulties in welding the weldment.

In addition, the conventional high-precision micro spot welding machine as described above includes a pair of pressurizing shafts for pressurizing the movable electrode tip means, a guide fixing block fixed to the front lower part of the head part to guide the pressurizing shaft, and a head part guide. There is a disadvantage in that the manufacturing cost is bound to increase due to many components such as parts.

Patent Application No. 10-2003-0078063, filing date; November 05, 2003

Therefore, the present invention has been made to solve the above problems, and the stroke of the movable electrode tip can be increased and at the same time more stably raised and lowered, and the movable electrode tip is connected to the ball screw for lifting of the drive unit. By configuring the micro spot welding machine to be positioned on the same axis and enabling more accurate spot welding without being eccentric, one welding machine can weld not only thin and low-height welded objects but also high-height welded objects. In addition, the purpose is to provide a non-eccentric servo pressure type micro spot welding machine that can lower the manufacturing cost with a simple configuration.

Other objects of the present invention will become apparent as the technology progresses.

The present invention for achieving the above object, in the non-eccentric servo pressure type micro spot welding machine, is equipped with a fixed electrode tip (110a), configured to receive welding current through a power supply line on one side, and a welded object on the upper surface A base member 120 provided to be able to install the fixed electrode unit 110 on one side of the upper surface to which (A) can be seated, and a body member having one end fixably provided on the other side of the upper surface of the base member 120 130, a servo motor 141 fixedly installed on the upper surface of the body member 130 and driven in response to the motor driving current being applied from the servo driver, and one end fixed to the servo motor 141 The driving unit 140 including the lifting ball screw 143, and one end connected to the lifting ball screw 143 of the driving unit 140 to correspond to the driving of the driving unit 140, the welded object ( A movable part 150 provided to ascend and descend to the side A), and installed at the lower end of the movable part 150 to receive welding current through a power supply line, so that the welding current flows to the fixed electrode part 110 It includes a movable electrode part 160 provided with a movable electrode tip 162 so that the object to be welded A can be welded by, but the moving part 150 is a lifting ball corresponding to the driving of the driving part 140 It is characterized in that it is configured to be welded from a thin object to be welded (thin plate) to a high welded object (can) by moving up and down from one end to the other end of the screw 143.

In addition, by being fixed to the front surface of the body member 130, the cover member 170 covers a part of the elevating ball screw 143 and the moving part 150 of the driving unit 140 to prevent foreign matter from entering. ) is characterized in that it is further provided.

As described above, according to the non-eccentric servo pressure type micro spot welding machine according to the present invention, the stroke of the movable electrode tip can be increased, and at the same time, it can be raised and lowered more stably, and the movable electrode tip is the lifting ball of the driving unit. Located on the same axis as the screw, the micro spot welding machine is configured to enable more accurate spot welding without being eccentric, so it welds not only thin and low-height welded objects with one welding machine, but also high-height welded objects. It has the effect of lowering the manufacturing cost with a simple configuration along with the effect of doing.

1 is a perspective view showing a non-eccentric servo pressure type micro spot welding machine according to the present invention.
2 is a view showing a state in which a can is welded using a non-eccentric servo pressure type micro spot welding machine according to the present invention.
3 is a view showing a state in which a thin plate is welded using a non-eccentric servo pressure type micro spot welding machine according to the present invention.
Figure 4 is a perspective view showing a moving block of the non-eccentric servo pressure type micro spot welding machine according to the present invention.
5 is a side view showing a non-eccentric servo pressure type micro spot welding machine according to the present invention.

Hereinafter, an embodiment of the non-eccentric servo pressure type micro spot welding machine according to the present invention will be described in detail.

First of all, it should be noted that in the drawings, the same components or parts are denoted by the same reference numerals as much as possible. In describing the present invention, detailed descriptions of related known functions or configurations are omitted in order not to obscure the subject matter of the present invention.

As shown, the non-eccentric servo pressure type micro spot welding machine 100 according to the present invention is equipped with a fixed electrode tip 110a, is configured to receive welding current through a power supply line on one side, and welds on the upper surface ( A) A base member 120 provided to be able to install the fixed electrode part 110 on one side of the upper surface to be seated, and a body member having one end fixably provided on the other side of the upper surface of the base member 120 ( 130), a servo motor 141 fixedly installed on the upper surface of the body member 130 and driven in response to the motor driving current being applied from the servo driver, and an elevating end fixed to the servo motor 141 A drive unit 140 including a ball screw 143 for driving, and one end connected to the ball screw 143 for lifting of the drive unit 140 to correspond to the drive of the driving unit 140, the object to be welded (A) ) side, and a moving part 150 provided to be able to ascend and descend, and is installed to receive welding current through a power supply line at the lower end of the moving part 150, and the welding current flows to the fixed electrode part 110 It includes a movable electrode part 160 provided with a movable electrode tip 162 so as to be able to weld the object to be welded (A), but the moving part 150 is a ball screw for lifting to correspond to the driving of the driving part 140. It is configured to be able to weld from one end to the other end of 143 to be welded with a thin thickness (thin plate) to a welded object with high height (can).

In addition, by fixing the front surface of the body member 130 via a plurality of screws, the elevating ball screw 143 of the driving unit 140 and a part of the moving unit 150 are covered to prevent foreign matter from entering. A cover member 170 formed in a "c" cross-sectional shape is further provided.

Hereinafter, the non-eccentric servo pressure type micro spot welding machine according to the present invention will be described in more detail with reference to the accompanying drawings 1 to 5.

First, the base member 120 of the non-eccentric servo pressure type micro spot welding machine according to the present invention described above has a fixed electrode tip 110a fixed to the top, and a welding current through a power supply line on one side. It is formed and provided in a polygonal plate shape including a circular shape so that the fixed electrode unit 110 configured to receive the supply and the body member 130 can be fixedly installed on one side and the other side of the upper surface.

The body member 130 is provided with one end fixed to the other side of the upper surface of the base member 120 to be located on one side of the fixed electrode unit 110 so that the driving unit 140 can be installed.

That is, the body member 130 has a fixing part 131 fixed to the other side of the upper surface of the base member 120, extending upward from the top of the fixing part 131, and the driving part on the top surface ( The motor bracket 132a is composed of an installation part 132 fastened with a plurality of screws so that the servo motor 141 of 140 can be seated and fixed.

The driving unit 140 is fixedly installed on the upper surface of the body member 130 and is driven by applying a motor driving current from a servo driver to correspond to the control of the control unit, thereby raising and lowering the moving unit 150. provided so that

That is, the driving unit 140 is fixed to the upper end of the body member 130 via a plurality of fixing screws, and is driven forward and backward by applying a motor driving current from the servo driver to the coupling 141a. An upper bearing support 142 fixed to the upper front surface of the connected servo motor 141 and the body member 130 and provided so that the coupling 141a can be rotatably inserted through a bearing interposed in the center portion And, the upper bearing by being fixed to the front surface of the lifting ball screw 143 having one end fixedly connected to the coupling 141a and having a lifting screw portion formed on the outer circumferential surface thereof, and the body member 130 It consists of a lower bearing support 144 spaced apart from the lower part of the support 142 and having a bearing interposed in the center so that the other end of the lifting ball screw 143 can be rotatably restrained.

The moving unit 150 has one end installed on the lifting ball screw 143 of the driving unit 140 and the movable electrode unit 160 fixedly installed at the other end to correspond to the driving of the driving unit 140. The movable electrode part 160 is provided so as to be able to ascend and descend toward the object to be welded on the fixed electrode part 110 .

That is, the moving unit 150 includes a guide rail 151a fixed to the front surface of the body member 130 via a plurality of fixing screws, and a guide block installed to slide along the guide rail 151a. LM guide 151 composed of (151b) and fixed to the guide block 151b of the LM guide 151 via a plurality of fixing screws. The ball screw nut 152a, which is transported up and down according to the rotation of the lifting ball screw 143, is fixed with a plurality of screws to correspond to the driving of the drive unit 140 by combining the screw 143 in a screw method. It is composed of a moving block 152 formed in a "C"-shaped cross section in which a front part is perforated.

In addition, a fixing surface 152b is further formed on the bottom surface of the moving block 152 so that the upper surface and parts of the left and right side surfaces of the movable electrode unit 160 can be fixed without shaking by surface contact.

The movable electrode part 160 is installed on the fixed surface 152b formed on the bottom surface of the moving block 152 of the moving part 150 to receive welding current through a power supply line to correspond to the driving of the driving part 140. By moving the welding current to the fixed electrode unit 110, the object to be welded is provided to be weldable.

That is, the movable electrode part 160 is detachably coupled to the lower surface of the moving part through a plurality of screws, and the movable electrode tip holder 161 provided on one side to receive welding current through a power supply line, It consists of a movable electrode tip 162 facing the base member 120 while being fixed in the center of the movable electrode tip holder 161 .

The non-eccentric servo pressure type micro spot welding machine according to the present invention configured as described above can weld from a thin sheet plate to a can having a high height. If you want to weld a thin sheet plate first, As shown in FIG. 3, when welding a can with a height, as shown in FIGS. 1, 2 and 5, the can is placed on the fixed electrode tip 110a of the fixed electrode unit 110. let go

Thereafter, the servo motor 141 of the driving unit 140 is driven in the forward direction by applying the motor driving current from the servo driver corresponding to the control of the controller.

The driving of the servo motor 141 rotates the lifting ball screw 143, and the rotation of the lifting ball screw 143 causes the moving block 152 of the moving unit 150 to move the lifting ball screw ( 143), that is, it moves toward the plate or can placed on top of the fixed electrode tip 110a of the fixed electrode unit 110.

While the movable block 152 of the movable part 150 is moving toward the plate placed on the top of the fixed electrode tip 110a of the fixed electrode 110, the movable electrode part fixed to the lower surface of the movable block 152 ( When the movable electrode tip 162 of 160 is in contact with the plate or can, spot welding of the thin plate or can is performed.

As described above, the non-eccentric servo pressure type micro spot welding machine according to the present invention has a large stroke of the moving block 152, that is, the movable electrode part 160, so that the thickness of the object to be welded is thin and the height is low It is possible to weld not only the object to be welded but also the object to be welded with a high height.

The above description is merely an example of the technical idea of the present invention, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

A; Work to be welded
100; Non-eccentric servo pressurized micro spot welding machine
110; fixed electrode part
120; base member
130; body member
140; driving part
150; moving part
160; movable electrode part
170; cover member

Claims (5)

In the non-eccentric servo pressure type micro spot welding machine,
It is equipped with a fixed electrode tip (110a), is configured to receive welding current through a power supply line on one side, and can install a fixed electrode unit 110 on one side of the upper surface so that the object to be welded (A) can be seated on the upper surface. a base member 120 provided to;
a body member 130 having one end fixed to the other side of the upper surface of the base member 120;
A servo motor 141 fixedly installed on the upper surface of the body member 130 and driven in response to the application of motor driving current from the servo driver, and a ball screw for lifting, one end of which is fixed to the servo motor 141 ( 143) and the drive unit 140 provided with it;
a moving part 150 having one end connected to the lifting ball screw 143 of the driving part 140 and capable of moving up and down toward the object to be welded (A) in correspondence with the driving of the driving part 140;
The movable electrode tip 162 is installed at the lower end of the movable part 150 to receive welding current through a power supply line so that the welding current flows to the fixed electrode part 110 so that the object to be welded A can be welded. Including a movable electrode unit 160 provided with,
The moving unit 150 moves up and down from one end to the other end of the lifting ball screw 143 corresponding to the driving of the driving unit 140, and is used for welding from a thin thickness (thin plate) to a high height (can). ) is configured to allow welding up to,
The moving unit 150 is composed of a guide rail 151a fixed to the front surface of the body member 130 and a guide block 151b installed to slide along the guide rail 151a. LM provided It is fixed to the guide 151 and the guide block 151b of the LM guide 151, and the ball screw 143 for lifting of the driving unit 140 is screwed to the center of the upper surface so that the driving unit 140 is Corresponding to the driving, the ball screw nut 152a, which is transported up and down according to the rotation of the lifting ball screw 143, is fixed with a plurality of screws and is a moving block 152 having a front part perforated. consists of
A fixing surface 152b is further formed on the bottom surface of the moving block 152 so that the upper surface and parts of the left and right side surfaces of the movable electrode unit 160 can be fixed without shaking by surface contact,
The movable electrode tip 162 of the movable electrode unit 160 is provided to be positioned on the same axis as the lifting ball screw 143 of the driving unit 140 so that spot welding is possible without being eccentric. Non-eccentric servo pressurized micro spot welding machine.
According to claim 1,
By being fixed to the front surface of the body member 130, a cover member 170 is further provided to cover a part of the elevating ball screw 143 and the moving part 150 of the driving part 140 to prevent foreign matter from entering. Non-eccentric servo pressure type micro spot welding machine, characterized in that provided.
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