welding equipment

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 device, and more particularly to an ultrasonic welding device for electrode lead tabs, which is capable of measuring in real time the pressure applied to a welding object such as an electrode lead tab during the welding process.

[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 documents of this Korean patent application are incorporated herein by reference. [Background technology]

[0003] Recently, battery cells have been widely used not only in small devices such as portable electronic devices but also in medium-sized and large devices such as automobiles and power storage devices. When used in such medium-sized and large devices, multiple battery cells are electrically connected to increase capacity and output. In particular, pouch-type battery cells are often used in such medium-sized and large devices because they have the advantage of being easily stored and stacked.

[0004] The pouch-type battery cell includes a cell case (pouch), an electrode assembly, and lead tabs. The electrode assembly is housed inside the cell case. The electrode assembly is made up of negative and positive electrode plates alternately stacked with a separator interposed between them.

[0005] The lead tabs are electrically connected to the electrode assembly and protrude outside the cell case. The lead tabs include a positive electrode tab and a negative electrode tab, and are provided in pairs.

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

[0007] The tab bundle welding process can form one positive electrode tab by welding a positive electrode tab bundle connected to a plurality of positive electrode plates that constitute the electrode assembly, and can form one negative electrode tab by welding a negative electrode tab bundle connected to a plurality of negative electrode plates that constitute the electrode assembly.

[0008] The tab bundle welding step 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, and Figs. 2 and 3 are diagrams for explaining the process of welding the tab bundle of a battery cell by the conventional welding device.

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

[0011] The battery cell 1 is placed on the mounting portion 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 is coaxial with the anvil 11 in the stacking direction Fz of the lead tabs. The horn 12 is connected to a pressing unit 14 and a vibration generating unit 16.

[0013] The pressing portion 14 applies pressure to the horn 12 in the stacking direction Fz of the tab bundle 2. When the pressing portion 14 is activated, 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 unit 16 applies vibrations from the horn 12 in a vibration transmission direction Fx while 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. The vibration generating unit 16 is a device that generates ultrasonic vibrations.

[0015] As shown in FIG. 3, when vibration generating unit 16 is activated, horn 12 vibrates in vibration transmission direction Fx and transmits the vibration to tab bundle 2, thereby welding tab bundle 2.

[0016] Generally, the welding quality of the tab bundle 2 varies depending on the pressure with which the horn 12 presses the tab bundle 2. Conventionally, it has been difficult to accurately measure the pressure supplied to the tab bundle 2 in real time during the welding process, making it impossible to manage the welding quality in real time. Summary of the Invention [Problem to be solved by the invention]

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

[0018] Another object of the present invention is to provide a welding device that can measure the maximum pressure applied to the workpieces during the welding process and adjust the pressure applied to the workpieces based on the measured maximum pressure.

[0019] Another object of the present invention is to provide a welding device that can press the workpieces with an optimized pressure to improve welding quality. [Means for solving the problem]

[0020] A welding apparatus according to one embodiment of the present invention includes a welding support, a welding section, and a control section.

[0021] Specifically, the welding device may include a welding support unit including a first support unit including an anvil on which the workpieces to be welded are placed, a second support unit including a pressure measuring unit that measures the pressure transmitted from the first support unit, and a guide unit that guides the movement of the first support unit and the second support unit, a welding unit that presses the workpieces to be welded and applies vibrations to the workpieces to be welded, and a control unit that monitors the measured pressure value of the pressure measuring unit.

[0022] The control unit may provide a warning alarm to the outside when the maximum pressure measured by the pressure measuring unit is outside a preset pressure range.

[0023] The control unit may be configured to adjust the pressure with which the welding unit presses the workpiece when the maximum pressure measured by the pressure measuring unit falls outside a preset pressure range.

[0024] The first support portion may be provided to be movable in a direction toward or away from the second support portion.

[0025] The welding support may further include an elastic portion for elastically connecting the first support and the second support.

[0026] The guide portion may include at least one first guide portion connected to the first support portion and guiding movement of the first support portion, at least one second guide portion connected to the second support portion and guiding movement of the second support portion, and a fixed portion to which the at least one first guide portion and the at least one second guide portion are attached spaced apart from each other.

[0027] The first guide portion and the second guide portion may be linear guides.

[0028] The welding support portion may also include a pusher member provided on the first support portion and positioned to contact the pressure measuring portion when the welding portion presses the workpiece on the first support portion.

[0029] The second support part may also include an insertion groove for inserting the first support part when the first support part is moved, and a mounting groove provided on the bottom surface of the insertion groove and in which the pressure measuring part is attached.

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

[0031] In addition, the first support part has an attachment groove at the lower end of the insertion part so as to face the placement groove, and a pusher member can be installed in the attachment groove to press the pressure measuring part when the welding part presses the workpiece 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 coupled to the second support portion in a recessed and projecting manner.

[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 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 comes into contact with 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] Furthermore, the lifting unit may be configured to move the rail so that the roller contacts a high point of the rail before the welding process, and the roller pushes the second support unit up toward the first support unit.

[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] The control unit may also be configured to output, based on the pressure data, a maximum pressure measured during the welding process and a graph of the pressure over time.

[0038] The welding part may also include a vibration generating part, a horn connected to the vibration generating part and contacting the workpiece to transmit vibrations to the workpiece, and a pressing member provided on the horn and applying a pressing force to the horn so that the horn presses the workpiece. [Effects of the Invention]

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

[0040] During the welding process, the pressure with which the horn presses the workpiece is measured in real time, and the maximum pressure with which the horn presses the workpiece can be confirmed from the pressure data over time, allowing the worker to monitor the welding quality according to the measured maximum pressure.

[0041] If the maximum pressure measured during welding standby is outside the range of the set value, the operator can reset the operating conditions of the welding section, thereby welding the welding object with a pressure optimized for the welding object and improving the welding quality of the welding object. [Brief explanation of the drawings]

[0042] [Figure 1] FIG. 1 is a diagram showing the configuration of a conventional welding device for performing a tab bundle welding process.

[0043] [Figure 2] 1A and 1B are diagrams illustrating a process in which a conventional welding device welds a tab bundle of a battery cell. [Figure 3] 1A and 1B are diagrams illustrating a process in which a conventional welding device welds a tab bundle of a battery cell.

[0044] [Figure 4]1 is a configuration diagram of a welding device according to an embodiment of the present invention.

[0045] [Figure 5] 1 is a schematic diagram illustrating the layout of a weld support and a weld relative to a workpiece according to an embodiment of the present invention;

[0046] [Figure 6] FIG. 2 is an exploded perspective view of a weld support according to an embodiment of the present invention.

[0047] [Figure 7] 1 is a perspective view of a welded support assembly according to an embodiment of the present invention;

[0048] [Figure 8] 10 is a diagram showing a connection state between a welding support part and a lifting part according to an embodiment of the present invention; FIG.

[0049] [Figure 9] 10 is a diagram illustrating an operation state of a welding support unit when a lifting unit is operating according to an embodiment of the present invention. FIG.

[0050] [Figure 10] 4 is a schematic illustration of a pressure graph displayed on a control unit according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

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

[0052] Furthermore, regardless of the reference number, identical or corresponding components will be given the same or similar reference numbers, and duplicate descriptions thereof will be omitted. The size and shape of each component shown for the convenience of explanation may be exaggerated or reduced.

[0053] The present invention provides a welding device that can measure the pressure applied to a workpiece during a welding process in real time and acquire the pressure value measured over time.

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

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

[0056] The welding support 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 110 and the welding part 170. The welding part 170 presses the welding object 2 and applies 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 measuring unit 140 measures the pressure applied to the welding support unit 110 when the welding unit 170 presses the workpiece 2. The control unit 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 measuring unit 140.

[0059] In the present invention, the structural characteristics of the welding support part 110 enable the pressure measuring part 140 to measure the pressing force on the work-piece 2 in real time.

[0060] The welding support 110 will be described below with reference to Figures 5 to 7. Figure 5 is a diagram showing the arrangement of the welding support and the welding part relative to the workpiece. Figure 6 is an exploded perspective view of the welding support, and Figure 7 is an assembled perspective view of the welding support.

[0061] Fig. 8 is a diagram showing the connection state between the welding support part and the lifting part, and Fig. 9 is a diagram showing the operation state of the welding support part when the lifting part is in operation.

[0062] 5 to 7, the welding support part 110 is disposed below the welding part 170. The welding support part 110 may include a first support part 120, a pusher member 127, a second support part 130, and a guide part 150. The welding support part 110 may also include an elastic part 137 and a lifting part 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 part 151 may be provided such that at least one first guide part 153 and at least one second guide part 155 are attached to be spaced apart from each other. The first guide part 153 guides the movement of the first support part 120, and the second guide part 155 guides the movement of the second support part 130.

[0065] The first support part 120 may be connected to the second support part 130 to be movable toward or away from the second support part 130. The first support part 120 is coupled to a first guide part 153. The first guide part 153 may be provided on a side of the first support part 120. The first guide part 153 guides the movement of the first support part 120 in a first axis direction Fz. For example, the first guide part 153 may be a linear guide.

[0066] The first support part 120 is disposed below the horn 171 of the welding part 170. The first support part 120 has an anvil 125 on which the workpieces 2 to be welded are placed. The workpieces 2 to be welded are placed on the anvil 125. The anvil 125 is disposed on the upper end of the first support part 120.

[0067] The first support part 120 may have a locking part 121 and an insertion part 122. The first support part 120 may integrally form the insertion part 122 and the locking part 121. The first support part 120 may be provided to be coupled to the second support part 130 by a recess-projection coupling.

[0068] The locking portion 121 may have a width greater than that of the insertion groove 131 and the insertion portion 122. The locking portion 121 may be provided to be hooked onto the upper end of the second support portion 130. An anvil 125 is provided on the upper surface of the locking portion 121.

[0069] The insertion portion 122 is provided to be inserted into the insertion groove 131 of the second support portion 130. The insertion portion 122 has a width smaller than that 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 to face the mounting groove 133. Specifically, the mounting groove 123 faces the mounting groove 133 and is provided so as to have a step on the lower surface of the insertion portion 122 in the upward direction Fz2 in the first axis direction Fz.

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

[0072] The pusher member 127 is bolted to the mounting groove 123. The pusher member 127 may be installed in the mounting groove 123 of the first support part 120 so as to be height adjustable according to the installation height of the pressure measuring part 140 installed in the mounting groove 133.

[0073] The second support part 130 includes a pressure measuring part 140 that measures the pressure transmitted from the first support part 120 .

[0074] The second support part 130 is coupled to the lower part of the first support part 120. The second support part 130 is elastically connected to the first support part 120 by an elastic part 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 that is open at the top in the first axis direction Fz. The first support part 120 may 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 axis direction Fz.

[0076] The second support portion 130 has a mounting groove 133 in a downward direction Fz1 in the first axial direction Fz, the mounting groove 133 having a step formed at the bottom surface of the insertion groove 131. A pressure measuring portion 140 is provided in the mounting groove 133.

[0077] The second support part 130 is connected to the fixed part 151 by a second guide part 155. At least one second guide part 155 may be provided on a 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 may be a linear guide.

[0078] 5 and 6, the pressure measuring unit 140 is housed in the mounting groove 133 of the second support unit 130. The pressure measuring unit 140 is provided on the second support unit 130 so as to be in contact with the first support unit 120. A load cell may be used as the pressure measuring unit 140.

[0079] The pressure measuring unit 140 is also provided to measure the pressure applied to the welding support 110 during the welding process. That is, the pressure measuring unit 140 measures the pressure transmitted from the first support 120 to the second support 130 when the welding portion 170 presses the first support 120 while sandwiching the work-piece 2.

[0080] 8 and 9, the welding support part 110 is configured such that when the second support part 130 is raised or lowered by the lifting part 160, the first support part 120 is lifted or lowered together with the second support part 130.

[0081] 8, the lifting unit 160 may include a rail 161, a rail operating unit 163, and rollers 165. The lifting unit 160 functions to raise or lower the first and second support units 120 and 130 in the first axial direction Fz according to the welding process.

[0082] In addition, the lifting unit 160 may be connected to a lower end of the second support unit 130. The lifting unit 160 moves the first support unit 120 up and down in the first axis direction Fz in conjunction with the second support unit 130.

[0083] The lifting unit 160 operates to move the rail 161 so that the roller 165 contacts the high point 161b of the rail 161 before the welding process, and the roller 165 pushes the second support unit 130 up toward the first support unit 120.

[0084] After the welding process is completed, the lifting unit 160 can move the rail 161 so that the roller 165 contacts the low point 161 a of the rail 161 and lower the second support unit 130 so that it is separated from the first support unit 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 rollers 165. The rail 161 is moved in a second axis direction Fy by a rail operating part 163. Here, the second axis direction Fy is a direction perpendicular to the first axis direction Fz.

[0086] The rail 161 contacts the roller 165 to guide 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 installed on the rail 161. The rail operating part 163 positions the roller 165 at the high point 161b or the low point 161a by moving the rail 161. The rail operating part 163 can move the rail 161 in a second axis direction Fy perpendicular to the first axis direction Fz.

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

[0089] 5, the welding part 170 is disposed on the upper part of the first support part 120. The welding part 170 presses the workpieces 2 to be welded in a first axis direction Fz perpendicular to the surfaces to be welded of the workpieces 2 to transmit vibrations to the surfaces to be welded.

[0090] The welding unit 170 may include a horn 171, a pressing member 173, and a vibration generating unit 175. The horn 171 is connected to the pressing member 173 and the vibration generating unit, and the horn 171 contacts the workpieces 2 to transmit vibrations to the workpieces 2.

[0091] The pressing member 173 is provided on the horn 171 and is configured to press the horn 171 in a first axial direction Fz. The first axial direction Fz is a direction perpendicular to the surface to be welded of the workpiece 2. The vibration generating unit is provided on the horn 171 and transmits vibrations in a 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 measuring unit 140. The control unit 180 can provide a warning alarm to the outside if the maximum pressure measured by the pressure measuring unit 140 is outside a preset pressure range.

[0093] The set pressure may range from 0.9 times to 1.1 times the set pressure of the work-pieces 2. The set pressure is a pressure that can be set in advance by an operator and can be varied depending on the work-pieces 2, so in this embodiment, a specific numerical value for the set pressure is omitted.

[0094] If the maximum pressure measured by the pressure measuring unit 140 is outside a preset pressure range, the control unit 180 can adjust the pressure with which the welding unit 170 presses the workpiece 2. The control unit 180 can output a graph of the maximum pressure measured during the welding process and the pressure over time based on the pressure data.

[0095] The welding process will be described below.

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

[0097] The welding support part 110 is operated so that the first and second support parts 120, 130 are raised and lowered in the first axial direction Fz by the lifting part 160. The positions of the first and second support parts 120, 130 in the first axial direction Fz are adjusted in conjunction with the lifting part 160.

[0098] Before the welding process, the rail operating unit 163 moves the rail 161 in the Fy1 direction (direction moving from the low point to the high point) of the second axial direction Fy so that the high point 161b of the rail 161 comes into contact with 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 up the second support unit 130 in the first axial direction Fz.

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

[0100] Next, before the welding process, welding portion 170 is positioned so that horn 171 comes into contact with workpiece 2 while descending (Fz1) in first axial direction Fz. At this time, horn 171 comes into contact with the upper surface of workpiece 2, and anvil 125 comes into contact with the lower surface of workpiece 2. Horn 171 and anvil 125 are positioned coaxially along first axial direction Fz.

[0101] The horn 171 clamps the workpiece 2 and presses the anvil 125. During the welding process, the horn 171 applies pressure to the workpiece 2 by being lowered in the Fz1 direction of the first axial direction Fz by the pressing member 173.

[0102] The pressure measuring unit 140 measures in real time the pressure with which the horn 171 presses the work-piece 2 during the welding process of the work-piece 2. Therefore, the present invention can ensure the maximum pressure with which the horn 171 presses the work-piece 2 during welding standby from pressure data according to the passage of process time.

[0103] FIG. 10 shows a schematic diagram of a pressure graph displayed on the control unit 180.

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

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

[0106] The first section S1 of the pressure graph is the state before horn 171 comes into contact with work-piece 2. In first section S1, work-piece 2 is in a state before being pressed by horn 171, and the pressure value measured by pressure measurement unit 140 is 0.

[0107] The second section S2 of the pressure graph is a section in which the lifting section 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 rollers 165 of the lifting part 160. At this time, the pressure measuring part 140 placed on the second support part 130 comes into contact with the pusher member 127 provided on the first support part 120.

[0109] The pressure value in the second section S2 is a pressure value measured when the pressure measuring unit 140 presses the pusher member 127 with the force of the lifting unit 160 pushing up the second support unit 130.

[0110] The third section S3 of the pressure graph is a section in which the horn 171 comes into contact with the work-piece 2 while descending in the first axial direction Fz and presses against the work-piece 2. The pressure value in the third section S3 is the pressure value measured when the pre-welding horn 171 presses against the work-piece 2 while descending in the first axial direction Fz. The pressure value in the third section S3 increases over time.

[0111] The pressure value in the fourth section S4 is the pressure value measured when the horn 171 presses the work-piece 2 during welding standby. The maximum pressure measured 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 comes into contact with the work-piece 2 in the fourth section S4.

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

[0113] The fifth section S5 is a section in which the horn 171 welds the work-pieces 2. The vibration generating unit 175 provides vibration to the horn 171. The horn 171 transmits the vibration to the work-pieces 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 each of the first axis direction Fz and the second axis direction Fy.

[0114] In the fifth section S5, if the welding object 2 is a tab bundle of a pouch-type battery cell, the thickness of the tab bundle will decrease while being fused in the first axial direction Fz, and the pressure value measured in the fifth section S5 will decrease over time.

[0115] In the sixth section S6, after welding is completed, the horn 171 is positioned at the welding position for a preset time to air-cool the workpieces 2. Air passes through the space between the workpieces 2 and the horn 171, allowing the workpieces 2 to cool naturally.

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

[0117] In the seventh section S7, the rail operating unit 163 moves the rail 161 in the second axial direction Fy so that the low point 161a of the rail 161 contacts the roller 165, causing the roller 165 to ride on the rail surface of the rail 161 and lower the second support unit 130 in the Fz1 direction of the first axial direction Fz.

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

[0119] If the maximum pressure measured during standby for welding falls outside the range of the set values, the operator can reset the operating conditions of the pressing member 173. Therefore, the present invention can weld the workpieces 2 with a pressure optimized for the workpieces 2, thereby improving the welding quality of the workpieces 2.

[0120] The preferred embodiments of the present invention described above have been disclosed for illustrative purposes, and those skilled in the art having ordinary skill in the art may make various modifications, changes, and additions within the spirit and scope of the present invention, and such modifications, changes, and additions should be considered to fall within the scope of the following claims. [Industrial Applicability]

[0121] According to at least one embodiment of the welding device of the present invention, the pressure with which the horn presses the workpiece during the welding process can be measured in real time, and the welding quality can be monitored 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 workpieces to apply vibration to the workpieces; 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 issues a warning alarm to an external device when the maximum pressure measured by the pressure measuring unit is outside a preset pressure range.

3. 2. The welding device according to claim 1, wherein the control unit adjusts the pressure with which the welding unit presses the workpiece 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 or 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 part is at least one first guide portion connected to the first support portion and guiding movement of the first support portion; at least one second guide portion connected to the second support portion and guiding movement of the second support portion; The welding device according to claim 4 , further comprising a fixing 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 work-piece 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 that is provided on a bottom surface of the insertion groove and to 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 and having 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 to press the pressure measuring portion when the welding portion presses the work-piece 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 including a lifting unit for lifting and lowering the second support unit; The welding device according to claim 1 , wherein when the second support section is raised or lowered by the lifting section, the first support section is linked to and raised or lowered by the second support section.

12. The lifting unit is a roller provided to the second support portion so as to be able to idle; a rail that contacts the roller to guide the roller during idling, the rail having 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 actuation unit 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 part toward the first support part; 13. The welding device according to claim 12, wherein, after the welding process is completed, the lifting unit moves the rail so that the roller contacts a low point of the rail, and lowers the second support unit so that it moves 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, the pressing member providing a pressing force to the horn so that the horn presses against the work-piece.

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