Welding device

Abstract

A welding apparatus according to an embodiment of the present invention may include a first support portion having an anvil on which a welding object is placed, a second support portion having a pressure measurement portion that measures pressure transmitted from the first support portion, and a welding support portion including a guide portion that guides the movement of the first support portion and the second support portion, a welding portion provided to press the welding object and apply vibration to the welding object, and a control portion that monitors the measured pressure value of the pressure measurement portion.

Description

Technical Field

[0001] The present invention relates to a welding apparatus, and more specifically, to an ultrasonic welding apparatus for an electrode lead tab, and relates to a welding apparatus capable of measuring in real time the pressure for pressing a welding object such as an electrode lead tab in a welding process of the welding object.

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0027480 filed on March 2, 2023, and all contents disclosed in the document of the Korean patent application are included as part of this specification.

Background Art

[0003] Recently, battery cells are widely used not only in small devices such as portable electronic devices but also in medium and large devices such as automobiles and power storage devices. When used in such medium or large devices, a large number of battery cells are electrically connected to increase the capacity and output. In particular, pouch-type battery cells are widely used in such medium or large devices because they have the advantage of being easy to store and stack.

[0004] The pouch-type battery cell includes a cell case (pouch), an electrode assembly, and a lead tab. The electrode assembly is housed inside the cell case. The electrode assembly is formed by alternately laminating a negative electrode plate and a positive electrode plate with a separator in between.

[0005] The lead tab is electrically connected to the electrode assembly and protrudes outside the cell case. The lead tab includes a positive electrode tab and a negative electrode tab, and is provided in a pair.

[0006] The lead tab is formed by a tab bundle welding process.

[0007] By the tab bundle welding process, a positive tab bundle connected to a plurality of positive electrode plates constituting the electrode assembly can be welded to form one positive tab, and a negative tab bundle connected to a plurality of negative electrode plates constituting the electrode assembly can be welded to form one negative tab.

[0008] The tab bundle welding process is performed by a welding device.

[0009] FIG. 1 is a configuration diagram of a welding device for performing a conventional tab bundle welding process. FIGS. 2 and 3 are diagrams for explaining the process of the conventional welding device welding the tab bundle of a battery cell.

[0010] As shown in FIGS. 1 and 2, a normal welding device 10 includes an anvil 11, a horn 12, a pressing part 14, and a vibration generating part 16.

[0011] The battery cell 1 is placed on the placement part 15, and the tab bundle 2 is placed on the anvil 11. The anvil 11 supports the tab bundle 2. The anvil 11 is disposed below the horn 12. The tab bundle 2 is located between the horn 12 and the anvil 11.

[0012] The horn 12 is disposed above the anvil 11, and the horn 12 is coaxially disposed with the anvil 11 in the stacking direction Fz of the lead tabs. The horn 12 is connected to the pressing part 14 and the vibration generating part 16.

[0013] The pressing part 14 provides pressure to the horn 12 in the stacking direction Fz of the tab bundle 2. When the pressing part 14 operates, the horn 12 descends in the stacking direction Fz of the tab bundle 2 and presses the tab bundle 2 placed on the anvil 11.

[0014] The vibration generating part 16 provides vibration with the horn 12 in the vibration transmission direction Fx in a state where the horn 12 presses the tab bundle 2 in the stacking direction Fz of the tab bundle 2. The vibration transmission direction Fx is a direction perpendicular to the stacking direction Fz of the tab bundle 2. Also, the vibration generating part 16 is a device that generates ultrasonic vibration.

[0015] As shown in FIG. 3, when the vibration generating unit 16 operates, the horn 12 vibrates in the vibration transmission direction Fx while transmitting the vibration to the tab bundle 2 to weld the tab bundle 2.

[0016] Generally, depending on the pressure with which the horn 12 presses the tab bundle 2, a difference in the welding quality of the tab bundle 2 occurs. Conventionally, in the welding process, it has been difficult to accurately measure in real time the pressure supplied to the tab bundle 2, and the welding quality could not be managed in real time.

Summary of the Invention

Problems to be Solved by the Invention

[0017] An object of the present invention is to provide a welding apparatus that can measure in real time the pressure for pressing a welding object in the welding process of a welding object such as an electrode lead tab, and adjust the pressure applied to the welding object based on the measured pressure.

[0018] Another object of the present invention is to provide a welding apparatus that can measure the maximum pressure for pressing a welding object during the welding process and adjust the pressure applied to the welding object based on this.

[0019] Another object of the present invention is to provide a welding apparatus that can press a welding object with an optimized pressure for the welding object and improve the welding quality.

Means for Solving the Problems

[0020] The welding apparatus according to an embodiment of the present invention includes a welding support portion, a welding portion, and a control portion.

[0021] Specifically, the welding apparatus may include a first support portion including an anvil on which a welding object is placed, a second support portion including a pressure measurement portion that measures the pressure transmitted from the first support portion, and a welding support portion including a guide portion that guides the movement of the first support portion and the second support portion, a welding portion provided to press the welding object and apply vibration to the welding object, and a control portion that monitors the measured pressure value of the pressure measurement portion.

[0022] When the maximum pressure measured by the pressure measurement unit deviates from the range of a preset set pressure, the control unit can provide an external warning alarm.

[0023] Further, when the maximum pressure measured by the pressure measurement unit deviates from the range of a preset set pressure, the control unit may be provided to adjust the pressure with which the welding unit presses the welding object.

[0024] Further, the first support part may be provided so as to be movable in a direction approaching or moving away from the second support part.

[0025] Further, the welding support part may further include an elastic part for elastically connecting the first support part and the second support part.

[0026] The guide part may include at least one first guide part connected to the first support part and guiding the movement of the first support part, at least one second guide part connected to the second support part and guiding the movement of the second support part, and a fixing part to which the at least one first guide part and the at least one second guide part are attached so as to be separated from each other.

[0027] Further, the first guide part and the second guide part may be linear guides.

[0028] Further, the welding support part may include a pusher member provided on the first support part and arranged to contact the pressure measurement unit when the welding unit presses the welding object on the first support part.

[0029] Further, the second support part may include an insertion groove for inserting the first support part when the first support part moves, and a placement groove provided on the bottom surface of the insertion groove and to which the pressure measurement unit is attached.

[0030] The first support portion may include an insertion portion adapted to be inserted into the insertion groove, and a locking portion adapted to be hooked onto an upper end of the second support portion and having a width wider than the insertion groove.

[0031] Further, the first support part has an attachment groove at a lower end of the insertion part so as to face the mounting groove, and a pusher member can be installed in the attachment groove to press the pressure measuring part when the welding part presses the welding object on the first support part.

[0032] The first support portion may be provided such that the insertion portion and the locking portion are integrally formed and are engaged with the second support portion through a projection and recess.

[0033] In addition, the welding support part may further include a lifting part for lifting and lowering the second support part, and when the second support part is lifted and lowered by the lifting part, the first support part may be configured to lift and lower together with the second support part in conjunction with the second support part.

[0034] The lifting unit may also include a roller that is idlingly mounted on the second support unit, a rail that contacts the roller to guide the idling of the roller and has a low point and a high point that is higher than the low point, and a rail operating unit that moves the rail so that the roller is positioned at the high point or the low point.

[0035] Moreover, the lifting section may be configured to move the rail so that the roller contacts a high point of the rail before a welding process, and the roller pushes the second support section up toward the first support section.

[0036] Furthermore, after the welding process is completed, the lifting unit can move the rail so that the roller contacts the low point of the rail, and lower the second support unit so that it moves away from the first support unit.

[0037] Further, the control unit may be provided to output a pressure graph corresponding to the maximum pressure measured during the welding process and the passage of time based on the pressure data.

[0038] Further, the welding unit may include a vibration generating unit, a horn connected to the vibration generating unit and contacting the object to be welded to transmit vibration to the object to be welded, and a pressing member provided on the horn to provide a pressing force to the horn so that the horn presses the object to be welded.

Advantages of the Invention

[0039] As described above, the welding apparatus according to at least one embodiment of the present invention has the following effects.

[0040] In the welding process of the object to be welded, the pressure with which the horn presses the object to be welded is measured in real time, and the maximum pressure with which the horn presses the object to be welded can be confirmed from the pressure data corresponding to the passage of the process time. Thereby, an operator can monitor the welding quality corresponding to the measured maximum pressure.

[0041] When the maximum pressure measured during the welding standby exceeds the range of the set value, the operator can reset the operating conditions of the welding unit. Thereby, the object to be welded can be welded with an optimized pressure for the object to be welded, and the welding quality of the object to be welded can be improved.

Brief Description of the Drawings

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Figure 1

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Figure 2

Figure 3

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Figure 4

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Figure 9

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Figure 10

Embodiments for Carrying Out the Invention

[0051] Hereinafter, a welding apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0052] Also, regardless of the reference signs, the same or corresponding components are given the same or similar reference numbers, and duplicate explanations thereof are omitted. The sizes and shapes of the respective constituent members shown for convenience of explanation may be exaggerated or reduced.

[0053] The present invention provides a welding apparatus capable of measuring in real time the pressure applied to a welding object during a welding process and obtaining the measured pressure value according to the passage of time.

[0054] FIG. 4 is a configuration diagram of a welding apparatus according to an embodiment of the present invention.

[0055] As shown in FIG. 4, a welding apparatus 100 according to an embodiment of the present invention may include a welding support part 110, a pressure measurement part 140, a welding part 170, and a control part 180.

[0056] The welding support part 110 supports the welding object 2 during the welding process of the welding object 2. The welding object 2 is pressed by the welding support part 110 and the welding part 170. The welding part 170 presses the welding object 2 and provides vibration to the welding object 2.

[0057] In this specification, the welding object 2 may be a tab bundle electrically connected to an electrode assembly.

[0058] The pressure measurement part 140 measures the pressure applied to the welding support part 110 when the welding part 170 presses the welding object 2. The control part 180 can monitor the measured pressure value according to the passage of time during the welding process based on the pressure data of the pressure measurement part 140.

[0059] Due to the structural characteristics of the welding support part 110, the present invention enables the pressure measurement part 140 to measure the pressing force on the welding object 2 in real time.

[0060] Hereinafter, the welding support part 110 will be described with reference to FIGS. 5 to 7. FIG. 5 is an arrangement diagram of the welding support part and the welding part with respect to the welding object. FIG. 6 is an exploded perspective view of the welding support part, and FIG. 7 is an assembled perspective view of the welding support part.

[0061] In addition, FIG. 8 is a connection state diagram of the welding support part and the lifting part. FIG. 9 is an operating state diagram of the welding support part when the lifting part operates.

[0062] Referring to FIGS. 5 to 7, the welding support portion 110 is disposed below the welding portion 170. Further, the welding support portion 110 may include a first support portion 120, a pusher member 127, a second support portion 130, and a guide portion 150. Further, the welding support portion 110 may include an elastic portion 137 and a lifting portion 160.

[0063] The guide portion 150 may include a fixing portion 151, a first guide portion 153, and a second guide portion 155.

[0064] The fixing portion 151 may be provided such that at least one first guide portion 153 and at least one second guide portion 155 are attached to be spaced apart from each other. The first guide portion 153 guides the movement of the first support portion 120, and the second guide portion 155 guides the movement of the second support portion 130.

[0065] The first support portion 120 may be connected to the second support portion 130 so as to be movable in a direction approaching or moving away from the second support portion 130. The first support portion 120 is coupled to the first guide portion 153. The first guide portion 153 may be provided on a side surface of the first support portion 120. The first guide portion 153 guides the movement of the first support portion 120 in the first axial direction Fz. As an example, the first guide portion 153 may be a linear guide.

[0066] The first support portion 120 is disposed below the horn 171 of the welding portion 170. The first support portion 120 has an anvil 125 on which the welding object 2 is placed. The welding object 2 is placed on the anvil 125. The anvil 125 is provided at the upper end of the first support portion 120.

[0067] The first support portion 120 may have a locking portion 121 and an insertion portion 122. The first support portion 120 may integrally form the insertion portion 122 and the locking portion 121. The first support portion 120 may be provided to engage with the second support portion 130 in a concave-convex manner.

[0068] The engaging portion 121 may have a width larger than that of the insertion groove 131 and the insertion portion 122. The engaging portion 121 may be provided so as to catch on the upper end of the second support portion 130. An anvil 125 is provided on the upper surface of the engaging portion 121.

[0069] The insertion portion 122 is provided so as to be inserted into the insertion groove 131 of the second support portion 130. The insertion portion 122 has a width smaller than the width of the insertion groove 131.

[0070] A mounting groove 123 is provided at the lower end of the insertion portion 122. The mounting groove 123 is provided at the lower end of the insertion portion 122 so as to face the placement groove 133. Specifically, the mounting groove 123 faces the placement groove 133, but is provided so as to have a step on the lower surface of the insertion portion 122 in the upward direction Fz2 of the first axial direction Fz.

[0071] A pusher member 127 is provided in the mounting groove 123. The pusher member 127 is for pressing the pressure measuring portion 140 when the welding portion 170 presses the welding object 2 on the first support portion 120.

[0072] The pusher member 127 is bolted to the mounting groove 123. The pusher member 127 may be provided in the mounting groove 123 of the first support portion 120 so that its height can be adjusted according to the installation height of the pressure measuring portion 140 provided in the placement groove 133.

[0073] The second support portion 130 includes a pressure measuring portion 140 for measuring the pressure transmitted from the first support portion 120.

[0074] The second support portion 130 is coupled to the lower portion of the first support portion 120. The second support portion 130 is elastically connected to the first support portion 120 by an elastic portion 137.

[0075] The second support part 130 is disposed below the first support part 120. The second support part 130 has an insertion groove 131 with an open upper part in the first axial direction Fz. The first support part 120 can be connected to the second support part 130 so as to be inserted into the insertion groove 131 of the second support part 130 in the first axial direction Fz.

[0076] The second support part 130 has a placement groove 133 with a step formed at the bottom surface of the insertion groove 131 in the downward direction Fz1 of the first axial direction Fz. A pressure measurement part 140 is provided in the placement groove 133.

[0077] The second support part 130 is connected to a fixing part 151 by a second guide part 155. At least one second guide part 155 can be provided on the side surface of the second support part 130. The second guide part 155 guides the movement of the second support part 130 in the first axial direction Fz. As an example, the second guide part 155 can be a linear guide.

[0078] As shown in FIGS. 5 and 6, the pressure measurement part 140 is accommodated in the placement groove 133 of the second support part 130. The pressure measurement part 140 is provided on the second support part 130 so as to contact the first support part 120. A load cell can be used as the pressure measurement part 140.

[0079] Also, the pressure measurement part 140 is provided to measure the pressure applied to the welding support part 110 during the welding process. That is, the pressure measurement part 140 measures the pressure transmitted from the first support part 120 to the second support part 130 when the welding part 170 presses the first support part 120 with the welding object 2 sandwiched therebetween.

[0080] Referring to FIGS. 8 and 9, the welding support part 110 is provided such that when the second support part 130 moves up and down by the lifting part 160, the first support part 120 moves up and down together in conjunction with the second support part 130.

[0081] As shown in FIG. 8, the elevating part 160 may include a rail 161, a rail operating part 163, and a roller 165. The elevating part 160 functions to raise or lower the first and second support parts 120 and 130 in the first axial direction Fz according to the welding process.

[0082] Also, the elevating part 160 may be connected to the lower end of the second support part 130. The elevating part 160 raises and lowers the first support part 120 in the first axial direction Fz in conjunction with the second support part 130.

[0083] Before the welding process, the elevating part 160 moves the rail 161 so that the roller 165 contacts the high point 161b of the rail 161, and operates so that the roller 165 pushes up the second support part 130 toward the first support part 120.

[0084] After the completion of the welding process, the elevating part 160 can move the rail 161 so that the roller 165 contacts the low point 161a of the rail 161, and lower the second support part 130 so that it moves away from the first support part 120.

[0085] The rail 161 is disposed below the second support part 130. The rail 161 is connected to the second support part 130 by the roller 165. The rail 161 moves in the second axial direction Fy by the rail operating part 163. Here, the second axial direction Fy is a direction perpendicular to the first axial direction Fz.

[0086] The rail 161 contacts the roller 165 and guides the idling of the roller 165. The rail 161 has a low point 161a and a high point 161b. The rail 161 has a rail surface in which the low point 161a and the high point 161b are connected with a predetermined curvature. The height H2 of the high point 161b is higher than the height H1 of the low point 161a.

[0087] The rail operating part 163 is provided on the rail 161. By moving the rail 161, the rail operating part 163 positions the roller 165 at the high point part 161b or the low point part 161a. The rail operating part 163 can move the rail 161 in the second axial direction Fy perpendicular to the first axial direction Fz.

[0088] The roller 165 is provided on the second support part 130. The roller 165 is arranged on the rail 161 so as to contact the rail. The roller 165 is placed on the rail 161 so as to be able to move up and down along the first axial direction Fz at the reference position P0. The roller 165 contacts the rail 161 and moves in the first axial direction Fz along the curvature of the rail 161 while idling when the rail 161 moves in the second axial direction Fy. The reference position P0 is a position arranged on the low point part 161a and may be the position of the welding support part 110.

[0089] As shown in FIG. 5, the welding part 170 is arranged above the first support part 120. The welding part 170 presses the welding object 2 in the first axial direction Fz perpendicular to the welding object surface of the welding object 2 and transmits vibration to the welding object surface.

[0090] The welding part 170 may include a horn 171, a pressing member 173, and a vibration generating part 175. The horn 171 is connected to the pressing member 173 and the vibration generating part, and the horn 171 contacts the welding object 2 and transmits vibration to the welding object 2.

[0091] The pressing member 173 is provided on the horn 171 and is provided to press the horn 171 in the first axial direction Fz. The first axial direction Fz is a direction perpendicular to the welding object surface of the welding object 2. The vibration generating part is provided on the horn 171 and transmits vibration in the third axial direction Fx. The third axial direction Fx is a direction perpendicular to the first axial direction Fz.

[0092] The control unit 180 can monitor the measured pressure value of the pressure measurement unit 140. When the maximum pressure measured by the pressure measurement unit 140 deviates from the preset pressure range, the control unit 180 can provide a warning alarm to the outside.

[0093] The preset pressure range can be from 0.9 times to 1.1 times the preset pressure of the welding object 2. The preset pressure is a pressure that can be preset by the operator and can be variable according to the welding object 2. Therefore, in this embodiment, specific numerical values for the preset pressure are omitted.

[0094] When the maximum pressure measured by the pressure measurement unit 140 deviates from the preset pressure range, the control unit 180 can adjust the pressure with which the welding unit 170 presses the welding object 2. The control unit 180 can output a pressure graph according to the maximum pressure measured during the welding process and the passage of time based on the pressure data.

[0095] Hereinafter, the welding process will be described.

[0096] The welding object 2 is placed on the anvil 125. Before the welding process, the welding support unit 110 and the welding unit 170 operate as follows.

[0097] The welding support unit 110 is operated so that the first and second support units 120 and 130 move up and down in the first axial direction Fz by the lifting unit 160. The first and second support units 120 and 130 are adjusted in position in the first axial direction Fz in conjunction with the lifting unit 160.

[0098] Before the welding process, the rail operating unit 163 moves the rail 161 in the Fy1 direction (the direction from the low point to the high point) of the second axial direction Fy so that the high point portion 161b of the rail 161 contacts the roller 165. As the rail 161 moves in the Fy1 direction of the second axial direction Fy, the roller 165 rides on the rail surface of the rail 161 and pushes the second support unit 130 upward in the first axial direction Fz.

[0099] The first and second support parts 120 and 130 move in the first axial direction Fz in conjunction with the roller 165. At this time, the second support part 130 is moved up and down (in the Fz2 direction) along the first axial direction Fz by at least one second guide part 155. The first support part 120 is interlocked with the second support part 130 and is moved up and down (in the Fz2 direction) along the first axial direction Fz by at least one first guide part 153.

[0100] Next, before the welding process, the welding part 170 is positioned so that the horn 171 contacts the welding object 2 while descending (Fz1) in the first axial direction Fz. At this time, the horn 171 contacts the upper surface of the welding object 2, and the anvil 125 contacts the lower surface of the welding object 2. The horn 171 and the anvil 125 are coaxially positioned along the first axial direction Fz.

[0101] The horn 171 presses the anvil 125 with the welding object 2 interposed therebetween. During the welding process, the horn 171 provides pressure to the welding object 2 while descending in the Fz1 direction among the first axial direction Fz by the pressing member 173.

[0102] The pressure measurement part 140 measures in real time the pressure with which the horn 171 presses the welding object 2 in the welding process of the welding object 2. Therefore, the present invention can secure the maximum pressure with which the horn 171 presses the welding object 2 at the time of waiting for welding from the pressure data according to the passage of the process time.

[0103] FIG. 10 schematically shows a pressure graph displayed on the control part 180.

[0104] As shown in FIG. 10, the control part 180 can monitor the measured pressure value P according to the passage of the time T during the welding process based on the pressure data of the pressure measurement part 140.

[0105] The control part 180 can display the measured maximum pressure and the pressure graph. The operator can monitor the welding quality according to the measured maximum pressure through the control part 180.

[0106] The first section S1 of the pressure graph is the state before the horn 171 contacts the object to be welded 2. In the first section S1, the object to be welded 2 is in the state before being pressed by the horn 171, and the pressure value measured by the pressure measurement unit 140 is 0.

[0107] The second section S2 of the pressure graph is the section where the lifting part 160 moves up and down in the first axial direction Fz.

[0108] In the second section S2, the second support part 130 moves up and down in the first axial direction Fz in conjunction with the roller 165 of the lifting part 160. At this time, the pressure measurement unit 140 placed on the second support part 130 contacts the pusher member 127 provided on the first support part 120.

[0109] The pressure value in the second section S2 is the pressure value measured when the pressure measurement unit 140 presses the pusher member 127 by the force with which the lifting part 160 pushes up the second support part 130.

[0110] The third section S3 of the pressure graph is the section where the horn 171 contacts the object to be welded 2 while descending in the first axial direction Fz and presses the object to be welded 2. The pressure value in the third section S3 is the pressure value measured when the horn 171 presses the object to be welded 2 while descending in the first axial direction Fz before welding. The pressure value in the third section S3 increases with the passage of time.

[0111] The pressure value in the fourth section S4 is the pressure value measured when the horn 171 presses the object to be welded 2 during the welding standby. The measured maximum pressure is the maximum value among the pressure values measured in the third section S3 and the fourth section S4. The position of the horn 171 during the welding process is the position where it contacts the object to be welded 2 in the fourth section S4.

[0112] The control unit 180 can provide a warning alarm when the measured maximum pressure is out of the range of the preset set pressure. When the maximum pressure measured during the welding standby is out of the range of the set value, the operator can reset the operating conditions of the welding part 170.

[0113] The fifth section S5 is the section where the horn 171 welds the welding object 2. The vibration generating unit 175 provides vibration to the horn 171. The horn 171 transmits the vibration to the welding object 2. The vibration generating unit 175 provides vibration to the horn 171 in the third axis direction Fx. The third axis direction Fx is a direction perpendicular to the first axis direction Fz and the second axis direction Fy respectively.

[0114] In the fifth section S5, when the welding object 2 is the tab bundle of the pouch-type battery cell, the tab bundle will have its thickness reduced while fusing in the first axis direction Fz. As a result, the pressure value measured in the fifth section S5 decreases over time.

[0115] The sixth section S6 is the section where, after welding is completed, the horn 171 is positioned at the welding position for a preset time while air-cooling the welding object 2. Air can naturally cool the welding object 2 while passing through the space between the welding object 2 and the horn 171.

[0116] The seventh section S7 is the section after the welding process is completed. In the seventh section S7, the horn 171 and the anvil 125 are separated from the welding object 2.

[0117] In the seventh section S7, the rail operating unit 163 moves the rail 161 in the second axis direction Fy so that the low point portion 161a of the rail 161 contacts the roller 165, whereby the roller 165 rides on the rail surface of the rail 161 and the second support portion 130 can be lowered in the Fz1 direction of the first axis direction Fz.

[0118] The first and second support portions 120 and 130 move in the first axis direction Fz in conjunction with the roller 165. At this time, the second support portion 130 descends in the Fz1 direction of the first axis direction Fz along the second guide portion 155. And the first support portion 120 descends in the Fz1 direction of the first axis direction Fz along the first guide portion 153.

[0119] When the maximum pressure measured in the welding receptacle deviates from the set value range, the operator can reset the operating conditions of the pressing member 173. Therefore, the present invention can weld the welding object 2 with an optimized pressure for the welding object 2 and improve the welding quality of the welding object 2.

[0120] The preferred embodiments of the present invention described above are disclosed for illustrative purposes, and those skilled in the art with ordinary knowledge of the present invention can make various modifications, changes, and additions within the spirit and scope of the present invention, and such modifications, changes, and additions should be regarded as belonging to the following claims.

Industrial Applicability

[0121] According to the welding apparatus according to at least one embodiment of the present invention, in the welding process of the welding object, the horn can measure in real time the pressure for pressing the welding object and monitor the welding quality based on the measured pressure.

Claims

1. a welding support including a first support including an anvil on which a workpiece to be welded is placed, a second support including a pressure measuring unit that measures a pressure transmitted from the first support, and a guide unit that guides the movement of the first support and the second support; a welding portion provided to press the workpiece and apply vibration to the workpiece; A control unit that monitors the measured pressure value of the pressure measuring unit.

2. The welding device according to claim 1 , wherein the control unit provides a warning alarm to an external device when the maximum pressure measured by the pressure measuring unit is out of a preset pressure range.

3. 2. The welding device according to claim 1, wherein the control unit adjusts the pressure with which the welding part presses the work-piece when the maximum pressure measured by the pressure measuring unit falls outside a preset range of set pressures.

4. the first support portion is provided to be movable in a direction toward and away from the second support portion, The welding device according to claim 1 , wherein the welding support further includes an elastic portion for elastically connecting the first support and the second support.

5. The guide section is At least one first guide portion connected to the first support portion and configured to guide a movement of the first support portion; At least one second guide portion connected to the second support portion and configured to guide a movement of the second support portion; The welding device according to claim 4 , further comprising a fixed portion to which the at least one first guide portion and the at least one second guide portion are attached and spaced apart from each other.

6. The welding device according to claim 5 , wherein the first guide portion and the second guide portion are linear guides.

7. The welding support portion is 2. The welding device according to claim 1, further comprising a pusher member provided on the first support portion and arranged to contact the pressure measuring portion when the welding portion presses the workpiece on the first support portion.

8. the second support portion includes an insertion groove into which the first support portion is inserted when the first support portion moves, and a mounting groove provided on a bottom surface of the insertion groove and into which the pressure measuring portion is attached, 2. The welding device according to claim 1, wherein the first support portion includes an insertion portion adapted to be inserted into the insertion groove, and a locking portion adapted to be hooked onto an upper end of the second support portion with a width wider than that of the insertion groove.

9. The first support portion has a mounting groove at a lower end of the insertion portion so as to face the mounting groove, The welding device according to claim 8 , wherein a pusher member is provided in the mounting groove, the pusher member pressing the pressure measuring portion when the welding portion presses the workpiece on the first support portion.

10. The welding device according to claim 8 , wherein the first support portion is provided such that the insertion portion and the locking portion are integrally formed and are coupled to the second support portion by projection and recess.

11. The welding support portion is Further comprising a lifting unit for lifting and lowering the second support unit, The welding device according to claim 1 , wherein when the second support portion is raised or lowered by the lifting portion, the first support portion is linked to and raised or lowered by the lifting portion.

12. The lifting unit is A roller that is idlingly provided on the second support portion; a rail that contacts the roller to guide the idling of the roller and has a low point and a high point that is higher than the low point; The welding device according to claim 11 , further comprising: a rail actuator for moving the rail so that the roller is positioned at the high point or the low point.

13. The lifting unit moves the rail so that the roller contacts a high point of the rail before a welding process, and the roller pushes up the second support portion toward the first support portion; The welding device according to claim 12 , wherein the lifting unit moves the rail so that the roller contacts a low point of the rail after the welding process is completed, and lowers the second support unit so that it is away from the first support unit.

14. The welding device according to claim 1 , wherein the control unit outputs a maximum pressure measured during the welding process and a pressure graph corresponding to the passage of time based on the measured pressure value.

15. The welded portion is A vibration generating unit; a horn connected to the vibration generating unit and contacting the workpiece to transmit vibration to the workpiece; The welding apparatus according to claim 1 , further comprising: a pressing member provided on the horn for applying a pressing force to the horn so that the horn presses the workpiece.

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