Welding device

Abstract

A welding device according to one embodiment of the present invention may comprise: a welding support part including a first support part having an anvil on which an object to be welded is placed, a second support part having a pressure measuring part that measures pressure transmitted from the first support part, and a guide part that guides the first support part to the second support part; the guide part is used for guiding the first supporting part and the second supporting part to move respectively; a welding part provided to apply pressure to the welding object and apply vibration to the welding object; and a control unit that monitors the pressure value measured by the pressure measurement unit.

Description

Technical Field

[0001] The present invention relates to a welding device, and more particularly, to an ultrasonic welding device for an electrode lead tab, wherein the welding device can measure the pressure applied to a welding object such as an electrode lead tab in real time during a welding process of the welding object.

[0002] This application claims the priority of Korean Patent Application No. 10-2023-0027480 filed on Mar. 2, 2023, the disclosure of which is incorporated herein by reference in its entirety. Background Art

[0003] Recently, battery cells have been widely used not only for small devices such as portable electronic devices, but also for medium and large devices such as automobiles or energy storage devices. When used for medium and large devices, many battery cells are electrically connected to increase capacity and output. In particular, pouch-type battery cells are often used for such medium and large devices due to the advantages of easy storage and lamination.

[0004] The pouch-type battery cell includes a cell case (pouch), an electrode assembly, and a lead tab. The electrode assembly is accommodated inside the cell case. The electrode assembly is configured by alternately laminating negative and positive electrode plates via separators.

[0005] Lead tabs are electrically connected to the electrode assembly and extend from the unit case, wherein the lead tabs include a positive electrode tab and a negative electrode tab and are provided as a pair.

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

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

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

[0009] Figure 1 It is a configuration diagram of a welding device for performing a conventional splice bundle welding process. Figure 2 and Figure 3 The figure illustrates a process of welding a tab bundle of a battery cell using a conventional welding device.

[0010] like Figure 1 and Figure 2 As shown, a typical welding device 10 includes an anvil 11 , a welding head 12 , a pressing portion 14 , and a vibration generating portion 16 .

[0011] The battery unit 1 is located on the placement portion 15, and the splice bundle 2 is placed on the anvil 11. The anvil 11 supports the splice bundle 2. The anvil 11 is arranged at the bottom of the welding head 12. The splice bundle 2 is located between the welding head 12 and the anvil 11.

[0012] The horn 12 is disposed on top of the anvil 11 , and the horn 12 is disposed coaxially with the anvil 11 in the lamination direction Fz of the lead tabs. The horn 12 is connected to the pressurizing portion 14 and the vibration generating portion 16 .

[0013] The pressurizing part 14 provides pressure to the welding head 12 in the laminating direction Fz of the splice bundle 2. When the pressurizing part 14 operates, the welding head 12 descends in the laminating direction Fz of the splice bundle 2 and presses the splice bundle 2 placed on the anvil 11.

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

[0015] like Figure 3 As shown, when the vibration generating part 16 is in operation, the welding head 12 vibrates in the vibration transmission direction Fx and transmits the vibration to the splice bundle 2, thereby welding the splice bundle 2.

[0016] Generally speaking, the welding quality of the splice bundle 2 varies according to the pressure applied by the welding head 12 to the splice bundle 2. Generally, in the welding process, it is difficult to accurately measure the pressure applied to the splice bundle 2 in real time, making it impossible to manage the welding quality in real time. Summary of the invention

[0017] Technical issues

[0018] The present invention is directed to providing a welding device capable of measuring pressure applied to a welding object in real time during a welding process of the welding object such as an electrode lead tab, and adjusting the pressure applied to the welding object based on the measured pressure.

[0019] Furthermore, the present invention is directed to providing a welding device capable of measuring a maximum pressure applied to a welding object in a welding process and adjusting the pressure applied to the welding object based thereon.

[0020] In addition, the present invention is intended to provide a welding device capable of pressurizing a welding object at a pressure optimized for the welding object to improve welding quality.

[0021] Technical Solution

[0022] A welding device according to one embodiment of the present invention includes a welding support portion, a welding portion, and a control portion.

[0023] Specifically, the welding device may include a welding support part, a welding part and a control part, the welding support part includes a first support part, a second support part and a guide part, the first support part includes an anvil for placing a welding object, the second support part includes a pressure measuring part for measuring the pressure transmitted from the first support part, the guide part guides the movement of the first support part and the second support part respectively, the welding part is configured to pressurize the welding object and apply vibration to the welding object, and the control part monitors the pressure value measured by the pressure measuring part.

[0024] When the maximum pressure measured by the pressure measuring part exceeds a preset set pressure range, the control part may provide an alarm to the outside.

[0025] Furthermore, when the maximum pressure measured by the pressure measuring part exceeds a preset set pressure range, the control part may be configured to adjust the pressure at which the welding part pressurizes the welding object.

[0026] In addition, the first supporting portion may be arranged to be movable in a direction approaching or moving away from the second supporting portion.

[0027] In addition, the welding support portion may further include an elastic portion for elastically connecting the first support portion and the second support portion.

[0028] The guide portion may include at least one first guide portion connected to the first supporting portion and guiding the movement of the first supporting portion, at least one second guide portion connected to the second supporting portion and guiding the movement of the second supporting portion, and a fixing portion, wherein the at least one first guide portion and the at least one second guide portion are mounted to the fixing portion separately from each other.

[0029] Furthermore, the first guide portion and the second guide portion may be linear guide rails.

[0030] In addition, the welding support portion may include a pushing member provided on the first support portion, and when the welding portion pressurizes the welding object on the first support portion, the pushing member is disposed to contact the pressure measuring portion.

[0031] In addition, the second supporting portion may include an insertion groove into which the first supporting portion is inserted when the first supporting portion moves, and a seating groove which is provided on a bottom surface of the insertion groove and in which the pressure measuring portion is installed.

[0032] Also, the first supporting portion may include an inserting portion configured to be inserted into the inserting groove, and a locking portion having a width greater than that of the inserting groove and configured to be caught on the top of the second supporting portion.

[0033] In addition, the first support portion may be provided with a mounting groove facing the seating groove at the bottom of the insertion portion, and a pushing member may be installed in the mounting groove. When the welding portion presses the welding object on the first support portion, the pushing member presses the pressure measuring portion.

[0034] In addition, the first supporting portion may be configured such that the inserting portion and the locking portion are integrally formed and unevenly coupled to the second supporting portion.

[0035] Also, the welding support may further include a lifting portion for lifting and lowering the second support, and the first support is connected to the second support to be lifted and lowered together when the lifting portion lifts and lowers the second support.

[0036] In addition, the lifting part may include a roller capable of idling, a track and a track operating part, the roller is mounted to the second supporting part, the track is in contact with the roller to guide the roller to idling, the track has a low point portion and a high point portion with a height greater than the low point portion, and the track operating part is used to move the track so that the roller is located at the high point portion or the low point portion.

[0037] In addition, before the welding process, the lifting part may move the rail so that the roller contacts the high point portion of the rail, so that the roller pushes the second supporting part upward toward the first supporting part.

[0038] Furthermore, after the welding process is completed, the lifting portion may lower the second supporting portion away from the first supporting portion by moving the rail so that the roller contacts the low point portion of the rail.

[0039] In addition, the control unit may be configured to output a maximum pressure measured during the welding process and a pressure graph over time based on the pressure data.

[0040] In addition, the welding part may include a vibration generating part, a welding head and a pressurizing member, wherein the welding head is connected to the vibration generating part and contacts the welding object to transmit vibration to the welding object, and the pressurizing member is installed on the welding head and provides a pressurizing force to the welding head so that the welding head pressurizes the welding object.

[0041] Beneficial Effects

[0042] As described above, the welding device according to at least one embodiment of the present invention has the following effects.

[0043] During the welding process of the welding object, the pressure applied by the welding head to the welding object can be measured in real time, and the maximum pressure applied by the welding head to the welding object can be confirmed based on the pressure data during the process time. Therefore, workers can monitor the welding quality based on the measured maximum pressure.

[0044] If the maximum pressure measured while waiting for welding exceeds the set value range, the worker can reset the operating conditions of the welding part. Therefore, by welding the welding object at a pressure optimized for the welding object, the welding quality of the welding object can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a configuration diagram of a welding device for performing a conventional splice bundle welding process.

[0046] Figure 2 and Figure 3 The figure illustrates the process of welding a battery tab bundle using a conventional welding device.

[0047] Figure 4 is a configuration diagram of a welding device according to an embodiment of the present invention.

[0048] Figure 5 The diagram schematically shows an arrangement diagram of a welding support part and a welding part with respect to a welding object according to an embodiment of the present invention.

[0049] Figure 6 is an exploded perspective view of a welding support according to one embodiment of the present invention.

[0050] Figure 7 is an assembled perspective view of a welding support according to one embodiment of the present invention.

[0051] Figure 8 4 is a diagram showing a connection state of a welding support portion and a lifting portion according to an embodiment of the present invention.

[0052] Fig. 9 FIG. 1 is a diagram showing an operating state of a welding support portion when a lifting portion is operating according to an embodiment of the present invention.

[0053] Fig.10 The figure schematically shows a pressure diagram displayed on a control unit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0054] Hereinafter, a welding device according to one embodiment of the present invention will be described with reference to the accompanying drawings.

[0055] In addition, regardless of the reference numerals, the same or corresponding components are given the same or similar reference numerals, and their repeated descriptions will be omitted, and the size and shape of each component shown may be exaggerated or reduced for convenience of explanation.

[0056] The present invention aims to provide a welding device capable of measuring the pressure applied to a welding object in real time during a welding process and obtaining the pressure value measured over time.

[0057] Figure 4 is a configuration diagram of a welding device according to an embodiment of the present invention.

[0058] like Figure 4 As shown, a welding device 100 related to one embodiment of the present invention may include a welding support portion 110 , a pressure measuring portion 140 , a welding portion 170 , and a control portion 180 .

[0059] The welding support part 110 supports the welding object 2 in the welding process of the welding object 2. The welding object 2 is pressurized by the welding support part 110 and the welding part 170. The welding part 170 pressurizes the welding object 2 and provides vibration to the welding object 2.

[0060] In the present invention, the welding object 2 may be a tab bundle electrically connected to an electrode assembly.

[0061] When the welding part 170 pressurizes the welding object 2, the pressure measuring part 140 measures the pressure applied to the welding support part 110. Based on the pressure data of the pressure measuring part 140, the control part 180 may monitor the pressure value measured over time in the welding process.

[0062] In the present invention, the pressure measuring part 140 can measure the pressure on the welding object 2 in real time through the structural characteristics of the welding support part 110 .

[0063] In the following, reference will be made to Figures 5 to 7 The welding support 110 is described. Figure 5 It is a layout diagram of the welding support and welding part relative to the welding object. Figure 6 This is an exploded perspective view of the welding support. Figure 7 It is a combined perspective view of the welding support part.

[0064] in addition, Figure 8 This is a diagram showing the connection status of the welding support part and the lifting part. Fig. 9 This is a diagram showing the operating state of the welding support portion when the lifting portion is operating.

[0065] Reference Figures 5 to 7 The welding support part 110 is disposed at the bottom of the welding part 170. Also, the welding support part 110 may include a first support part 120, a pushing member 127, a second support part 130, and a guide part 150. In addition, the welding support part 110 may include an elastic part 137 and a lifting part 160.

[0066] The guide portion 150 may include a fixing portion 151 , a first guide portion 153 , and a second guide portion 155 .

[0067] The fixing portion 151 may be configured such that at least one first guide portion 153 and at least one second guide portion 155 are installed to be separated from each other. The first guide portion 153 guides the movement of the first supporting portion 120 , and the second guide portion 155 guides the movement of the second supporting portion 130 .

[0068] The first support portion 120 may be connected to the second support portion 130 to move in a direction close to or 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 installed at one side 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 embodiment, the first guide portion 153 may be a linear guide rail.

[0069] The first support part 120 is provided at the bottom of the welding head 171 of the welding part 170. The first support part 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 installed on the top of the first support part 120.

[0070] The first support portion 120 may have a locking portion 121 and an inserting portion 122. In the first support portion 120, the inserting portion 122 and the locking portion 121 may be integrally formed. The first support portion 120 may be disposed to be unevenly coupled to the second support portion 130.

[0071] The locking portion 121 may have a greater width than the insertion groove 131 and the insertion portion 122. The locking portion 121 may be disposed to be caught on the top of the second supporting portion 130. The anvil 125 is installed on an upper surface of the locking portion 121.

[0072] The insertion portion 122 is disposed to be inserted into the insertion groove 131 of the second support portion 130. The insertion portion 122 has a smaller width than the insertion groove 131.

[0073] The mounting groove 123 is provided at the bottom of the insertion part 122. The mounting groove 123 is provided at the bottom of the insertion part 122 to face the seating groove 133. Specifically, the mounting groove 123 faces the seating groove 133 but is provided to be recessed into the lower surface of the insertion part 122 in the upward direction Fz2 of the first axial direction Fz.

[0074] The pushing member 127 is installed in the installation groove 123. When the welding part 170 presses the welding object 2 on the first supporting part 120, the pushing member 127 serves to pressurize the pressure measuring part 140.

[0075] The pushing member 127 is bolted to the mounting groove 123. The pushing member 127 may be installed in the mounting groove 123 of the first support part 120 such that its height may be adjusted according to the installation height of the pressure measuring part 140 installed in the seating groove 133.

[0076] The second supporting portion 130 includes a pressure measuring portion 140 that measures the pressure transmitted from the first supporting portion 120 .

[0077] The second support portion 130 is coupled to a lower portion of the first support portion 120. The second support portion 130 is elastically connected to the first support portion 120 through an elastic portion 137.

[0078] The second support portion 130 is disposed at the bottom of the first support portion 120. The second support portion 130 has an insertion groove 131, the top of which is open in the first axial direction Fz. The first support portion 120 may be connected to the second support portion 130 to be inserted into the insertion groove 131 of the second support portion 130 in the first axial direction Fz.

[0079] The second support portion 130 has a seating groove 133 which is recessed into the bottom surface of the insertion groove 131 in the downward direction Fz1 of the first axial direction Fz. The pressure measuring portion 140 is installed in the seating groove 133.

[0080] The second support portion 130 is connected to the fixing portion 151 through a second guide portion 155. At least one second guide portion 155 may be installed at one side of the second support portion 130. The second guide portion 155 guides the movement of the second support portion 130 in the first axial direction Fz. As an embodiment, the second guide portion 155 may be a linear guide rail.

[0081] like Figure 5 and Figure 6 As shown, the pressure measuring part 140 is received in the seating groove 133 of the second supporting part 130. The pressure measuring part 140 is installed on the second supporting part 130 to contact the first supporting part 120. A load cell may be used as the pressure measuring part 140.

[0082] Furthermore, the pressure measuring part 140 is configured to measure the pressure applied to the welding support part 110 during the welding process. That is, when the welding part 170 applies pressure to the first support part 120 and the welding object 2 is placed between the welding part 170 and the first support part 120, the pressure measuring part 140 measures the pressure transmitted from the first support part 120 to the second support part 130.

[0083] Reference Figure 8 and Fig. 9The welding support part 110 is arranged so that when the second support part 130 is raised and lowered by the lifting part 160 , the first support part 120 is connected with the second support part 130 to be raised and lowered together.

[0084] like Figure 8 As shown, the lifting part 160 may include a rail 161, a rail operating part 163, and a roller 165. The lifting part 160 performs a function of raising or lowering the first support part 120 and the second support part 130 in the first axial direction Fz according to a welding process.

[0085] Also, the lifting portion 160 may be connected to the lower end of the second support portion 130. The lifting portion 160 allows the first support portion 120 to be raised and lowered together with the second support portion 130 in the first axial direction Fz.

[0086] Before the welding process, the lifting part 160 moves the rail 161 so that the roller 165 contacts the high point portion 161 b of the rail 161 , so that the roller 165 pushes the second support part 130 upward toward the first support part 120 .

[0087] After the welding process is completed, the lifting part 160 may lower the second supporting part 130 away from the first supporting part 120 by moving the rail 161 so that the roller 165 contacts the low point portion 161 a of the rail 161 .

[0088] The rail 161 is provided at the bottom of the second support portion 130. The rail 161 is connected to the second support portion 130 through a roller 165. The rail 161 moves in the second axial direction Fy through the rail operating portion 163. Here, the second axial direction Fy is a direction perpendicular to the first axial direction Fz.

[0089] The track 161 contacts the roller 165 to guide the roller 165 to idle. The track 161 has a low point portion 161a and a high point portion 161b. The track 161 has a track surface connecting the low point portion 161a and the high point portion 161b with a predetermined curvature. The height H2 of the high point portion 161b is higher than the height H1 of the low point portion 161a.

[0090] The rail operator 163 is mounted to the rail 161. The rail operator 163 moves the rail 161 so that the roller 165 is located at the high point portion 161b or the low point portion 161a. The rail operator 163 can move the rail 161 in a second axial direction Fy perpendicular to the first axial direction Fz.

[0091] The roller 165 is mounted to the second support portion 130. The roller 165 is disposed on the rail 161 to contact the rail 161. The roller 165 is located on the rail 161 to move up and down along the first axial direction Fz at a reference position P0. When the rail 161 moves in the second axial direction Fy, the roller 165 contacts the rail 161 and moves in the first axial direction Fz along the curvature of the rail 161 while idling. The reference position P0 is a position disposed at the low point portion 161a, which may be a position where the support portion 110 is welded.

[0092] like Figure 5 As shown, the welding part 170 is disposed on the top of the first supporting 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.

[0093] The welding part 170 may include a horn 171, a pressurizing member 173, and a vibration generating part 175. The horn 171 is connected to the pressurizing member 173 and the vibration generating part 175, and contacts the welding object 2 to transmit vibration to the welding object 2.

[0094] The pressurizing member 173 is mounted to the welding head 171 so as to be configured to pressurize the welding head 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 175 is mounted to the welding head 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.

[0095] The control part 180 may monitor the pressure value measured by the pressure measuring part 140. When the maximum pressure measured by the pressure measuring part 140 exceeds a preset set pressure range, the control part 180 may provide an alarm to the outside.

[0096] The set pressure range may be 0.9 to 1.1 times the set pressure of the welding object 2. The set pressure is a pressure that can be set in advance by a worker and may vary according to the welding object 2, so in this embodiment, the specific value of the set pressure will be omitted.

[0097] If the maximum pressure measured by the pressure measuring part 140 exceeds the preset set pressure range, the control part 180 may adjust the pressure at which the welding part 170 pressurizes the welding object 2. The control part 180 may output the maximum pressure measured in the welding process and a pressure graph varying with time based on the pressure data.

[0098] Hereinafter, the welding process will be described.

[0099] The welding object 2 is placed on the anvil 125. Before the welding process, the welding support part 110 and the welding part 170 are operated as follows.

[0100] The welding support 110 operates so that the first support 120 and the second support 130 are elevated and lowered in the first axial direction Fz by the lifting part 160. The first support 120 and the second support 130 are connected to the lifting part 160 to adjust the positions in the first axial direction Fz.

[0101] Before the welding process, the rail operating part 163 moves the rail 161 in the Fy1 direction (the direction moving from the low point portion to the high point portion) of the second axial direction Fy, so that the high point portion 161b of the rail 161 contacts the roller 165. When the rail 161 moves in the Fy1 direction of the second axial direction Fy, the roller 165 slides on the rail surface of the rail 161 and pushes the second support part 130 upward in the first axial direction Fz.

[0102] The first support portion 120 and the second support portion 130 are connected to the roller 165 to move in the first axial direction Fz. At this time, the second support portion 130 rises in the first axial direction Fz (Fz2 direction) along at least one second guide portion 155. The first support portion 120 and the second support portion 130 are connected to rise in the first axial direction Fz (Fz2 direction) along at least one first guide portion 153.

[0103] Next, before the welding process, when the welding head 171 is lowered (Fz1) in the first axial direction Fz, the welding part 170 is positioned to contact the welding object 2. In this case, the welding head 171 contacts the upper surface of the welding object 2, and the anvil 125 contacts the lower surface of the welding object 2. The welding head 171 and the anvil 125 are coaxially placed along the first axial direction Fz.

[0104] The horn 171 presses the anvil 125 with the welding object 2 interposed therebetween. In the welding process, the horn 171 provides pressure to the welding object 2 while descending in the Fz1 direction of the first axial direction Fz by the pressurizing member 173.

[0105] The pressure measuring unit 140 measures the pressure of the welding head 171 on the welding object 2 in real time during the welding process of the welding object 2. Therefore, the present invention can ensure the maximum pressure of the welding head 171 on the welding object 2 when waiting for welding based on the pressure data during the process time.

[0106] Fig.10 A pressure diagram displayed on the control unit 180 is schematically shown.

[0107] like Fig.10 As shown, the control part 180 may monitor the pressure value P measured over time T during the welding process based on the pressure data of the pressure measuring part 140 .

[0108] The control unit 180 can display the measured maximum pressure and a pressure graph. Through the control unit 180, the worker can monitor the welding quality according to the measured maximum pressure.

[0109] The first portion S1 of the pressure graph is a state before the welding head 171 contacts the welding object 2. In the first portion S1, the welding object 2 is in a state before being pressed by the welding head 171, wherein the pressure value measured by the pressure measuring part 140 is zero.

[0110] The second portion S2 of the pressure diagram is a portion where the lifting portion 160 rises and falls in the first axial direction Fz.

[0111] In the second section S2, the second support part 130 is connected to the roller 165 of the lifting part 160 to rise and fall in the first axial direction Fz. At this time, the pressure measuring part 140 installed on the second support part 130 contacts the pushing member 127 installed on the first support part 120.

[0112] The pressure value of the second portion S2 is a pressure value measured when the pressure measuring part 140 presses the pushing member 127 due to the force of the lifting part 160 pushing the second supporting part 130 upward.

[0113] The third portion S3 of the pressure graph is a portion where the welding head 171 contacts the welding object 2 while descending in the first axial direction Fz and applies pressure to the welding object 2. The pressure value of the third portion S3 is a pressure value measured before welding when the welding head 171 applies pressure to the welding object 2 while descending in the first axial direction Fz. The pressure value of the third portion S3 increases with time.

[0114] The pressure value of the fourth portion S4 is the pressure value measured when the welding head 171 applies pressure to the welding object 2 while waiting for welding. The maximum pressure measured is the highest value among the pressure values ​​measured in the third portion S3 and the fourth portion S4. During the welding process, the position of the welding head 171 is the position in contact with the welding object 2 in the fourth portion S4.

[0115] When the measured maximum pressure exceeds the preset set pressure range, the control part 180 may provide an alarm. If the measured maximum pressure exceeds the set value range while waiting for welding, the worker may reset the operating condition of the welding part 170.

[0116] The fifth portion S5 is a portion where the welding head 171 welds the welding object 2. The vibration generating portion 175 provides vibration to the welding head 171. The welding head 171 transmits the vibration to the welding object 2. The vibration generating portion 175 provides vibration to the welding head 171 in the third axial direction Fx. The third axial direction Fx is a direction perpendicular to the first axial direction Fz and the second axial direction Fy, respectively.

[0117] In the fifth section S5, when the welding object 2 is a tab bundle of a pouch-type battery cell, the tab bundle is fused in the first axial direction Fz, and the thickness of the tab bundle is reduced. Therefore, the pressure value measured in the fifth section S5 decreases over time.

[0118] The sixth portion S6 is a portion where the welding object 2 is cooled in the air after the welding is completed when the welding head 171 is placed at the welding position for a preset time. The air can naturally cool the welding object 2 while passing through the space between the welding object 2 and the welding head 171.

[0119] The seventh section S7 is a section after the welding process is completed. In the seventh section S7, the welding head 171 and the anvil 125 are separated from the welding object 2.

[0120] In the seventh section S7, the rail operator 163 moves the rail 161 in the second axial direction Fy, thereby causing the roller 165 to slide on the rail surface of the rail 161, so that the low point portion 161a of the rail 161 contacts the roller 165, and the second support portion 130 descends in the Fz1 direction of the first axial direction Fz.

[0121] The first support portion 120 and the second support portion 130 are connected to the roller 165 to move in the first axial direction Fz. In this case, the second support portion 130 descends in the Fz1 direction of the first axial direction Fz along the second guide portion 155. Thereafter, the first support portion 120 descends in the Fz1 direction of the first axial direction Fz along the first guide portion 153.

[0122] If the maximum pressure measured during the waiting time for welding exceeds the set value range, the worker can reset the operating condition of the pressurizing member 173. Therefore, the present invention can improve the welding quality of the welding object 2 by welding the welding object 2 at a pressure optimized for the welding object 2.

[0123] For the purpose of illustration, the preferred embodiments of the present invention as described above have been disclosed, and those skilled in the art with ordinary knowledge of the present invention will be able to make various modifications, changes and additions within the spirit and scope of the present invention, and these modifications, changes and additions should be deemed to fall within the scope of the appended claims.

[0124] Industrial Applicability

[0125] A welding device according to at least one embodiment of the present invention can measure the pressure of a welding head pressurizing a welding object in real time during a welding process of the welding object, and can monitor welding quality based on the measured pressure.

Claims

1. A welding device, comprising: a welding support portion, the welding support portion comprising a first support portion, a second support portion and a guide portion, the first support portion comprising an anvil for placing a welding object, the second support portion comprising a pressure measuring portion for measuring a pressure transmitted from the first support portion, and the guide portion guiding the movement of the first support portion and the second support portion respectively; a welding part configured to pressurize the welding object and apply vibration to the welding object; and A control unit monitors the pressure value measured by the pressure measuring unit.

2. The welding device according to claim 1, wherein: When the maximum pressure measured by the pressure measuring part exceeds a preset set pressure range, the control part provides an alarm to the outside.

3. The welding device according to claim 1, wherein: When the maximum pressure measured by the pressure measuring part exceeds a preset set pressure range, the control part adjusts the pressure at which the welding part pressurizes the welding object.

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

5. The welding device according to claim 4, wherein: The guide portion comprises: 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 supporting portion and guiding movement of the second supporting portion; and A fixing portion to which the at least one first guide portion and the at least one second guide portion are mounted separately from each other.

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

7. The welding device according to claim 1, wherein: The welding support further comprises: The pushing member provided on the first supporting portion is arranged to contact the pressure measuring portion when the welding portion pressurizes the welding object on the first supporting portion.

8. The welding device according to claim 1, wherein: The second supporting part includes an insertion groove and a placement groove, the first supporting part is inserted into the insertion groove when the first supporting part moves, and the placement groove is provided on the bottom surface of the insertion groove and the pressure measuring part is installed. The first supporting portion includes an inserting portion configured to be inserted into the inserting groove and a locking portion having a width greater than that of the inserting groove and configured to be caught on the top of the second supporting portion.

9. The welding device according to claim 8, wherein: The first supporting portion is provided with a mounting groove at the bottom of the inserting portion facing the placement groove. A pushing member is installed in the installation groove, and when the welding part presses the welding object on the first supporting part, the pushing member presses the pressure measuring part.

10. The welding device according to claim 8, wherein: The first supporting portion is configured such that the inserting portion and the locking portion are integrally formed, and is unevenly coupled to the second supporting portion.

11. The welding device according to claim 1, wherein: The welding support further comprises: a lifting part, the lifting part being used to raise and lower the second supporting part, Wherein, the first supporting portion is connected to the second supporting portion so as to be raised and lowered together when the lifting portion raises and lowers the second supporting portion.

12. The welding device according to claim 11, wherein: The lifting part comprises: a roller capable of idling, the roller being mounted to the second support portion; a track, the track being in contact with the roller to guide the roller to idle, the track having a low point portion and a high point portion having a height greater than the low point portion; and A track operating part is used to move the track so that the roller is located at the high point part or the low point part.

13. The welding device according to claim 12, wherein: Before the welding process, the lifting part moves the track so that the roller contacts the high point of the track, so that the roller pushes the second support part upward toward the first support part. After the welding process is completed, the lifting part lowers the second supporting part away from the first supporting part by moving the rail so that the roller contacts the low point portion of the rail.

14. The welding device according to claim 1, wherein: The control unit outputs a maximum pressure measured in the welding process and a pressure graph with time based on the pressure data.

15. The welding device according to claim 1, wherein: The welding part comprises: a vibration generating unit; a welding head connected to the vibration generating portion and in contact with the welding object to transmit vibration to the welding object; and A pressurizing member is mounted on the welding head and provides a pressurizing force to the welding head so that the welding head pressurizes the welding object.

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