A hot press welding automation apparatus and a hot press welding method

Abstract

This invention discloses a novel automated thermocompression welding device and method. The automated thermocompression welding device includes a power supply, a controller, a drive mechanism, and a thermocompression welding mechanism. The drive mechanism is connected to the thermocompression welding mechanism and electrically connected to the controller, used to drive the thermocompression welding mechanism to move horizontally. The thermocompression welding mechanism includes multiple independent thermocompression welding components. Each thermocompression welding component includes a welding head, electrode rod, punch rod, and vertical drive component connected in sequence, and also includes a pressure sensor and a temperature sensor. The vertical drive component, pressure sensor, and temperature sensor are electrically connected to the controller. The pressure sensor is used to sense the pressure of the welding head pressing down, the temperature sensor is used to sense the temperature of the welding head, and the vertical drive component is used to drive the punch rod, electrode rod, and welding head to move vertically. This device and method can ensure that the pressure and temperature on each FPC pad and pin are consistent, guaranteeing the welding quality and avoiding defects such as incomplete welding, weak welding, or high-temperature weld burns.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and specifically to a novel automated thermo-press welding equipment and thermo-press welding method. Background Technology

[0002] Currently, an increasing number of magnetic heads 130 are being soldered to FPC 140 using thermocompression welding. Thermocompression welding is primarily performed using thermocompression welding equipment. This equipment features a flat welding head 110, which generates heat by using a pulsed current flowing through it, creating heat to heat the workpiece. The magnetic head 130 has multiple pins 131, and the FPC 140 has a corresponding number of pads 141 on its soldering surface. During soldering, solder paste is first applied to the pads 141 of the FPC 140. The magnetic head 130 is then placed in the material tray recess 120, and the FPC 140 is placed into the inner cavity of the magnetic head 130. At this point, the multiple pins 131 on the magnetic head 130 correspond one-to-one with and contact the multiple pads 141 on the FPC 140. The welding head 110 of the thermoforming equipment moves downward to press the pads 141 of the FPC 140 against the pins 131 of the magnetic head 130. The heat generated by the welding head 110 melts the solder paste between the pads 141 of the FPC 140 and the pins 131 of the magnetic head 130. Cooling air ducts blow air onto the welded parts to cool them, causing the solder paste to solidify, thereby fixing the pads 141 of the FPC 140 and the pins 131 of the magnetic head 130 in place. Finally, the welding head 110 is lifted upward, completing the welding of the magnetic head 130 to the FPC 140.

[0003] For the magnetic head 130 using thermocompression welding, the coplanarity of the pins 131 has a significant impact on welding performance. This coplanarity is influenced by factors such as materials and assembly precision. To ensure welding performance, the coplanarity of the pins 131 during the production and assembly of the magnetic head 130 needs to be controlled as much as possible. Production control also involves checking the coplanarity of the assembled pins 131 as frequently as possible. This significantly impacts the production and assembly efficiency of the magnetic head 130 and incurs considerable costs. Furthermore, even with careful control of the coplanarity of the pins 131 during production and assembly, deviations in the coplanarity of the assembled pins 131 can still occur, resulting in differences in the assembly height of the individual pins 131. Furthermore, during welding, when the magnetic head 130 is placed into the material tray groove 120, it is impossible to completely guarantee that the magnetic head 130 is perpendicular to the groove 120. If the magnetic head 130 is slightly tilted in the material tray groove 120, its pins 131 will also tilt accordingly.

[0004] During welding, the plane of the welding head 110 will press down on the pins 131 of the FPC 140 and the magnetic head 130. When the coplanarity of the pins 131 of the magnetic head 130 is not ideal, the welding pressure on each pin 131 is inconsistent; the pins 131 with higher heights receive greater downward pressure from the welding head 110, while the pins 131 with lower heights receive less downward pressure. For example... Figure 1 As shown, the higher pins 131 experience greater pressure, making them more susceptible to deformation during soldering due to the soldering head 110 squeezing them. Conversely, the lower pins 131 experience less pressure, resulting in less tight contact between them and the pads 141 of the FPC 140. This prevents the solder paste from fully adhering to and securing the pins 131 and pads 141, easily leading to cold solder joints. Furthermore, there is a risk of separation between the pins 131 and the pads 141 of the FPC 140 during subsequent use of the magnetic head 130. Additionally, the inconsistent pressure and temperature of the soldering head 110 on each pin 131 result in inconsistent soldering outcomes across the various magnetic heads 130. In severe cases, some pins 131 in a magnetic head 130 may be firmly soldered to the pads 141 of the FPC 140, while others may be loosely soldered and easily separate. Additionally, the soldering temperature of some pins 131 to the pads 141 of the FPC 140 may be too high, causing burns to the surface of the FPC 140 and resulting in separation between the layers of the FPC 140. This severely affects the soldering performance between the FPC 140 and the magnetic head 130. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a new type of automated thermo-press welding equipment that can ensure that the pressure and temperature of each FPC pad and pin are consistent, thereby guaranteeing the quality of welding and avoiding defects such as incomplete welding, weak welding or high-temperature weld damage.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows: A novel automated thermobaric welding device includes a power supply, a controller, a drive mechanism, and a thermobaric welding mechanism; the drive mechanism is connected to the thermobaric welding mechanism and electrically connected to the controller, and is used to drive the thermobaric welding mechanism to move horizontally; the thermobaric welding mechanism includes multiple sets of independent thermobaric welding components, each set of thermobaric welding components includes a welding head, an electrode rod, a punch rod, and a vertical drive component connected in sequence, and the thermobaric welding component also includes a pressure sensor and a temperature sensor, the vertical drive component, the pressure sensor, and the temperature sensor are all electrically connected to the controller, and the power supply is electrically connected to the electrode rod and the controller; the pressure sensor is used to sense the pressure of the welding head pressing down on the pads of the FPC and the pins of the magnetic head, the temperature sensor is used to sense the temperature of the welding head, and the vertical drive component is used to drive the punch rod, the electrode rod, and the welding head to move vertically.

[0007] Compared to existing technologies, the advantages of this invention are as follows: This equipment is equipped with multiple independent thermocompression welding assemblies, each of which independently includes a welding head, electrode rod, punch rod, vertical drive component, pressure sensor, and temperature sensor. During welding, the drive mechanism moves the thermocompression welding mechanism horizontally, positioning it above the area to be welded. The vertical drive component drives the punch rod and welding head downwards, pressing the welding head down onto the pads of the FPC and the pins of the magnetic head. At this time, the pressure sensor senses the pressure of the welding head and sends a pressure signal to the controller. Based on the received pressure signal, the controller adjusts the downward stroke of the vertical drive component and punch rod accordingly, thereby adjusting the pressure of the welding head to ensure that the welding head pressure of each thermocompression welding assembly meets the requirements and is consistent. Subsequently, the controller controls the power supply to output current to the electrode rod, providing heat to the welding head. The temperature sensor senses the temperature of the welding head and sends a temperature signal to the controller. Based on the received temperature signal, the controller adjusts the output current of the power supply accordingly, ensuring that the welding head temperature of each thermocompression welding assembly meets the requirements and is consistent. Therefore, this equipment ensures that the pressure and temperature on each FPC pad and pin are consistent, guaranteeing the quality of the soldering and avoiding defects such as cold solder joints, weak solder joints, or high-temperature solder burns.

[0008] The aforementioned novel automated thermostatic welding equipment includes a drive mechanism comprising a support frame and a mounting plate, wherein the mounting plate is horizontally movably connected to the support frame, and the thermostatic welding assembly further includes a fixing rod, one end of which is connected to the mounting plate and the other end of which is connected to the vertical drive component.

[0009] In the aforementioned novel automated thermo-press welding equipment, the fixed rods in the multiple sets of thermo-press welding components are staggered and connected to different positions of their respective vertical drive components.

[0010] In the aforementioned novel automated thermobaric welding equipment, the lower dimension of the electrode rod is comparable to the size of the welding head, and the middle dimension of the electrode rod gradually increases from bottom to top, transitioning to the upper part of the electrode rod.

[0011] In the aforementioned novel automated thermo-press welding equipment, when the thermo-press welding components are distributed in more than two groups along the same straight line, the two pole rods located on the outer sides are inclined outward from bottom to top.

[0012] In the aforementioned novel automated thermobaric welding equipment, the upper and lower ends of the pressure sensor abut against the punch rod and the electrode rod, respectively.

[0013] In the aforementioned novel automated hot-press welding equipment, the temperature sensor is a thermocouple welded to the side of the welding head.

[0014] The aforementioned novel automated thermobaric welding equipment also includes a material tray, the drive mechanism of which can drive the material tray to move horizontally, and the material tray has multiple grooves for positioning and placing the magnetic head.

[0015] The present invention also provides a thermostatic welding method, which uses the above-mentioned automated thermostatic welding equipment and includes the following steps:

[0016] S100: Program and set the movement direction, step distance, welding pressure, welding temperature and welding time of the automated hot press welding equipment, and set the set values ​​of welding pressure and welding temperature.

[0017] S200, The controller sends a command to the drive mechanism, and the drive mechanism drives the thermobaric welding assembly to move horizontally above the part to be welded;

[0018] S300, The controller sends a command to the vertical drive of all thermocompression welding components, causing the vertical drive to drive the punch to move downward, and the punch to push the electrode and welding head downward, so that the welding head presses down to press against the pads of the FPC and the pins of the magnetic head;

[0019] S400, the pressure sensors in each group of the thermocompression welding assembly send the pressure signals sensed by the welding head to the controller. The controller receives the pressure signals from multiple groups of pressure sensors and compares each group of pressure signals with the set value of welding pressure in step S100. If the data of the received pressure signal is inconsistent with the set value of welding pressure, the controller issues a command to the corresponding vertical drive component to adjust the downward stroke of the corresponding punch. When the data of all received pressure signals are consistent with the set value of welding pressure, the controller controls the power supply to output current to the electrode.

[0020] S500: The temperature sensors in each group of the thermocompression welding assembly send the temperature signals of the welding head to the controller. The controller receives the temperature signals from multiple groups of temperature sensors and compares them with the welding temperature setting value in step S100. If the received temperature signal data is inconsistent with the welding temperature setting value, the controller sends a command to the power supply to adjust the output current of the power supply to the electrode corresponding to the temperature sensor. When the data of all received temperature signals are consistent with the welding temperature setting value, the controller sends a command to the vertical drive and the power supply to keep the welding head at the welding pressure and welding temperature setting values ​​for welding.

[0021] This welding method utilizes the aforementioned automated thermocompression welding equipment. Before welding, the various parameters of the automated thermocompression welding equipment are first set, especially the welding pressure and welding temperature settings. During the welding process, the number and position of the working thermocompression welding components, the pins of the magnetic head to be welded, and the pads of the FPC are consistent. The pressure sensors in each group of thermocompression welding components can independently sense the downward pressure of their respective welding heads and send the pressure signal to the controller. The controller analyzes the data and adjusts the downward pressure of that group of welding heads accordingly, ensuring that the pressure of all welding heads remains consistent. The controller then independently controls the power supply to input current to each welding head to heat it. Each group of temperature sensors can independently sense the temperature of its respective welding head and send the temperature signal to the controller. After collecting the temperature data, the controller adjusts the temperature of each welding head by adjusting the output current of the power supply, ensuring that the temperature of all welding heads remains consistent, thus achieving automatic parameter adjustment and personalized settings. Because the pressure and temperature experienced by each pin of the magnetic head and the pads of the FPC are consistent, welding quality is guaranteed, avoiding defects such as incomplete welds, weak welds, or high-temperature weld burns. Since this method can monitor and independently control the pressure and temperature of each welding head in real time, it is no longer necessary to invest too much manpower and resources to adjust and monitor the coplanarity of the pins after the magnetic head is assembled during the production and assembly process. It is also not necessary to require very precise material tray groove dimensions to limit the magnetic head. This can improve the production efficiency of magnetic heads and material trays, reduce the production cost of magnetic heads and material trays, and at the same time ensure welding quality and improve product quality.

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0023] Figure 1 A schematic diagram of a partial structure during welding using existing thermocompression welding equipment;

[0024] Figure 2 This is a schematic diagram of the structure of the automated hot-press welding equipment according to Embodiment 1 of the present invention;

[0025] Figure 3 This is a partial structural diagram of the automated hot-press welding equipment during welding, according to Embodiment 1 of the present invention.

[0026] Figure 4 This is a schematic diagram of the structure of the thermocompression welding assembly according to Embodiment 1 of the present invention;

[0027] Figure 5 This is a schematic diagram of the welding head and electrode rod according to Embodiment 1 of the present invention;

[0028] Figure 6 for Figure 5 Top view of the structure shown;

[0029] Figure 7 This is a schematic diagram of the structure of the thermocompression welding assembly according to Embodiment 2 of the present invention;

[0030] Figure 8 This is a flowchart of the thermocompression welding method according to Embodiment 3 of the present invention.

[0031] Reference numerals: 110 Welding head, 120 Material tray groove, 130 Magnetic head, 131 Pin, 140 FPC, 141 Pad, 200 Drive mechanism, 210 Support frame, 220 Mounting plate, 221 First back plate, 222 Second back plate, 230 Mounting plate drive screw, 300 Hot press welding mechanism, 310 Hot press welding assembly, 311 Welding head, 312 Electrode, 313 Punch rod, 314 Vertical drive component, 315 Pressure sensor, 316 Temperature sensor, 317 Fixing rod, 318 Current input line, 410 Magnetic head, 411 Pin, 510 FPC, 511 Pad, 610 Material tray, 611 Groove, 620 Material tray drive screw. Detailed Implementation

[0032] The embodiments of the present invention are described in detail below:

[0033] Example 1

[0034] Reference Figures 2 to 6This invention provides a novel automated thermostatic welding device, including a power supply, a controller, a drive mechanism 200, and a thermostatic welding mechanism 300. The drive mechanism 200 is connected to the thermostatic welding mechanism 300 and electrically connected to the controller, used to drive the thermostatic welding mechanism 300 to move horizontally. The thermostatic welding mechanism 300 includes multiple sets of independent thermostatic welding components 310, each set of thermostatic welding components 310 including a welding head 311, an electrode 312, a punch 313, and a vertical drive component 314 connected in sequence. The thermostatic welding components 310 also... It includes a pressure sensor 315 and a temperature sensor 316. The vertical drive 314, pressure sensor 315 and temperature sensor 316 are all electrically connected to the controller. The power supply is electrically connected to the electrode 312 and the controller. The pressure sensor 315 is used to sense the pressure of the welding head 311 pressing down on the pad 511 of the FPC 510 and the pin 411 of the magnetic head 410. The temperature sensor 316 is used to sense the temperature of the welding head 311. The vertical drive 314 is used to drive the punch 313, electrode 312 and welding head 311 to move vertically.

[0035] This equipment also includes a material tray 610, and a drive mechanism can drive the material tray 610 to move horizontally. The material tray 610 has multiple grooves 611 for positioning and placing the magnetic heads 410. Figure 2As shown, before welding, the magnetic head 410 is placed in the groove 611 of the material tray 610, and the FPC 510 is placed in the inner cavity of the magnetic head 410, ensuring that the pads 511 of the FPC 510 and the pins 411 of the magnetic head 410 are in contact one-to-one. Then, the material tray 610 moves to the target position in the front-back direction. The controller controls the drive mechanism 200 to start, and the starting mechanism drives the thermocompression welding mechanism 300 to move horizontally in the left-right direction, so that the thermocompression welding mechanism 300 moves above the FPC 510 and the magnetic head 410. Since this equipment is equipped with multiple independent thermocompression welding assemblies 310, the number of thermocompression welding assemblies 310 corresponds to the number of pads 511 of the FPC 510 to be welded and the number of magnetic heads 410. Each thermocompression welding assembly 310 is independently equipped with a welding head 311, an electrode rod 312, a punch rod 313, a vertical drive component 314, a pressure sensor 315, and a temperature sensor 316. During welding, the vertical drive component 314 drives the punch 313 and welding head 311 to press down, causing the welding head 311 to press down to the pad 511 of the FPC 510 and the pin 411 of the magnetic head 410. At this time, the pressure sensor 315 can sense the pressure of the welding head 311 pressing down and send the pressure signal to the controller. The controller adjusts the pressing stroke of the vertical drive component 314 and the punch 313 accordingly based on the received pressure signal, thereby adjusting the pressure of the welding head 311 so that the welding head 311 pressure of each group of thermocompression welding components 310 meets the requirements and is consistent. Afterwards, the controller controls the power supply to output current to the electrode 312 to provide heat to the welding head 311. The temperature sensor 316 can sense the temperature of the welding head 311 and send the temperature signal to the controller. The controller adjusts the output current of the power supply accordingly based on the received temperature signal so that the welding head 311 temperature of each group of thermocompression welding components 310 meets the requirements and is consistent. Therefore, as Figure 3 As shown, this equipment ensures that the pressure and temperature on the pads 511 and pins 411 of each FPC510 are consistent, which can guarantee the quality of the soldering and avoid defects such as cold solder joints, weak solder joints or high-temperature solder damage.

[0036] It should be noted that during soldering, the heat from the solder head 311 melts the solder paste between the solder pad 511 and the pin 411. Then, the soldering area is cooled by air blowing through the cooling duct. After the solder paste solidifies, the solder pad 511 and the pin 411 are soldered and fixed. However, components such as the cooling duct are not the focus of this invention. Their specific structure and working principle can be found in existing technology and will not be elaborated here.

[0037] Furthermore, referring to Figure 2 and Figure 4The drive mechanism 200 includes a support frame 210 and a mounting plate 220. The mounting plate 220 is horizontally movably connected to the support frame 210. The thermoforming assembly 310 also includes a fixing rod 317, one end of which is connected to the mounting plate 220, and the other end is connected to a vertical drive member 314. When the mounting plate 220 moves horizontally relative to the support frame 210, the mounting plate 220 will drive the thermoforming mechanism 300 to move horizontally, causing the thermoforming assembly 310 to move horizontally above the FPC 510 and the magnetic head 410. Further, the mounting plate 220 includes a first back plate 221 and a second back plate 222. The first back plate 221 is horizontally movably connected to the support frame 210, the upper part of the second back plate 222 is connected to the first back plate 221, and one end of the fixing rod 317 is connected to the second back plate 222. Specifically, the side of the second back plate 222 is fitted and connected to the side of the first back plate 221, and the length of the second back plate 222 fitted and connected to the first back plate 221 exceeds half of the length of the second back plate 222 itself. Specifically, a mounting plate screw 230 can be installed in the support frame 210. The drive motor of the mounting plate screw 230 is electrically connected to the controller, and the controller can control the drive motor to drive it. Then, through the transmission of the mounting plate screw 230, the first back plate 221 can be moved in the horizontal direction.

[0038] Furthermore, referring to Figure 4 The fixing rods 317 in the multiple sets of thermo-welded assemblies 310 are staggered and connected to different positions of their respective vertical drive members 314. Therefore, the fixing rods 317 in each set of thermo-welded assemblies 310 will not experience assembly conflicts. Figure 4 For example, in one embodiment of the present invention, the pins 411 of the magnetic head 410, the pads 511 of the FPC 510, and the thermoforming assembly 310 each have six sets. In this case, the six sets of vertical drive members 314 are distributed in three rows and two columns, three rows when viewed from the left-right direction and two columns when viewed from the front-back direction. For the first row of vertical drive members 314, the left and right sets of fixing rods 317 are respectively connected to the left and right sides of their respective vertical drive members 314. When installed on the left or right sides, they can be installed closer to the top or closer to the bottom. For the middle row of vertical drive members 314, the left and right sets of fixing rods 317 are also respectively connected to the left and right sides of their respective vertical drive members 314. When installed on the left or right sides, they can be installed closer to the top or closer to the bottom. However, the fixing rods 317 corresponding to the first row of vertical drive members 314 and the middle row of vertical drive members 314 are installed with a staggered vertical alignment. The last row of vertical drive components 314 has two sets of fixing rods 317 connected to the rear side of each vertical drive component 314. This not only avoids assembly conflicts but also reduces the space required for the distribution of multiple sets of fixing rods 317, making the structure of the thermoforming welding mechanism 300 more compact. Specifically, the vertical drive components 314 can be pneumatic cylinders or electric cylinders, etc.

[0039] Furthermore, continue to refer to Figure 4 The pressure sensor 315 has its upper and lower ends abutting against the punch 313 and the electrode 312, respectively. Since the electrode 312 and the welding head 311 are assembled and fixed together, the pressure on the electrode 312 from the punch 313 is equal to the pressure on the welding head 311. Consequently, the pressure on the pads 511 of the FPC 510 and the pins 411 of the magnetic head 410 is equal to the pressure on the electrode 312 from the punch 313. The pressure sensor 315 is positioned between the punch 313 and the electrode 312, and the pressure it senses from the punch 313 is equivalent to the pressure on the pads 511 of the FPC 510 and the pins 411 of the magnetic head 410 from the welding head 311. Furthermore, the temperature sensor 316 is a thermocouple welded to the side of the welding head 311. The thermocouple is electrically connected to the controller and can send the sensed temperature of the welding head 311 to the controller. Furthermore, each set of electrode rods 312 is connected to a current input line 318, which is connected to a power supply. The controller can control the pulse current received by the electrode rod 312 by controlling the power supply, thereby adjusting the heating temperature of the electrode rod 312 and the welding head 311.

[0040] Furthermore, referring to Figure 5 and Figure 6 The lower part of the electrode 312 is approximately the same size as the welding head 311, or slightly larger or smaller, as long as it is compatible with the welding head 311. The lower part of the electrode 312 is assembled with the corresponding welding head 311 to receive the welding head 311. For example, in... Figure 5In this configuration, the electrode 312 is inserted into the welding head 311. Therefore, the lower dimension of the electrode 312 is smaller than the dimension of the welding head 311. The lower part of the electrode 312 and the welding head 311 form a space-constrained working area. The middle dimension of the electrode 312 gradually increases from bottom to top, transitioning to the upper part. This gradually increasing middle dimension forms a spatial transition area, while the upper dimension of the electrode 312 is the largest, used to house pressure components and forming a spatially expanded control structure area. The space-constrained working area refers to the small spacing between the multiple pins 411 of the magnetic head 410. The dimension of the welding head 311 cannot exceed the dimension of the inner cavity of the magnetic head 410; therefore, the dimension of the welding head 311 is limited by the dimension of the inner cavity of the magnetic head 410. This space-constrained structure is not conducive to placing the relatively large pressure sensor 315 and vertical drive component 314. Therefore, this application adds an electrode rod 312 as a supporting structure, and adopts a gradually expanding size setting from bottom to top, increasing the area of ​​the upper part of the electrode rod 312, so that the top of the electrode rod 312 has sufficient area to support the placement of the pressure sensor 315 and vertical drive component 314. The spatial transition zone is the area where the size of the electrode rod 312 gradually increases. The spatially expanded control structure area refers to the upper structure area after the electrode rod 312 is enlarged. After the space is expanded, it is easier to place components such as the pressure sensor 315 and the vertical drive component 314. Furthermore, as... Figure 5 As shown, when more than two groups of thermo-press welding assemblies 310 are distributed along the same straight line, the two pole rods 312 located on the outer sides are inclined outward from bottom to top, which can make the pole rods 312 better form a spatial transition zone, and make the structure of the thermo-press welding mechanism 300 more compact under the premise that each group of thermo-press welding assemblies 310 does not affect each other.

[0041] Example 2

[0042] Embodiment 2 of the present invention also provides an automated thermostatic welding device. In this embodiment, the thermostatic welding assembly 310 is provided in six groups, arranged in three rows and two columns, with three rows viewed from the left and right and two columns viewed from the front and back. Normally, the pins 411 of the magnetic head 410 are arranged in pairs in a row; in this embodiment, the six groups of thermostatic welding assemblies 310 are also arranged in pairs in a row. When the pins 411 of the magnetic head 410 are in only one row, only one row of thermostatic welding assemblies 310 is operational. Figure 7 As shown, when the magnetic head 410 has only two rows of pins 411, only two rows of thermocompressed components 310 are operational. When the magnetic head 410 has three rows of pins 411, all three rows of thermocompressed components 310 are operational. Therefore, this device can be used for magnetic heads 410 of various structures, and has a wide range of applications.

[0043] Example 3

[0044] Reference Figure 2and Figure 8 Embodiment 3 of the present invention provides a thermocompression welding method, which uses the above-mentioned automated thermocompression welding equipment and includes the following steps:

[0045] S100: Program and set the movement direction, step distance, welding pressure, welding temperature and welding time of the automated hot press welding equipment, and set the set values ​​of welding pressure and welding temperature.

[0046] S200: The controller sends instructions to the drive mechanism 200. The drive mechanism 200, according to the set motion direction and step distance, causes the material tray drive screw 620 to rotate, causing the material tray 610 to move in the front-back direction. On the other hand, it causes the mounting plate drive screw 230 to rotate, causing the mounting plate 220 to move in the left-right direction, so that the hot press welding assembly 310 moves horizontally above the part to be welded.

[0047] S300. After the material tray 610 and the thermoforming assembly 310 are moved into place, the controller sends a command to the vertical drive members 314 of all thermoforming assemblies 310, causing the vertical drive members 314 to drive the punch rod 313 to move downward. The punch rod 313 pushes the electrode rod 312 and the welding head 311 downward, so that the welding head 311 presses down on the pad 511 of the FPC 510 and the pin 411 of the magnetic head 410. It should be noted that "pressing down" here refers to pressure pressing, and does not mean that the welding head 311 is in direct contact with the pad 511 of the FPC 510 and the pin 411 of the magnetic head 410.

[0048] After the welding head 311 is pressed down in step S400, the pressure sensor 315 in each group of hot press welding components 310 sends the pressure signal sensed by the welding head 311 to the controller. The controller receives the pressure signals from multiple groups of pressure sensors 315 and compares the multiple pressure signals with the set value of welding pressure in step S100. If the data of the received pressure signal is inconsistent with the set value of welding pressure, that is, the pressure parameter is not qualified, the controller sends a command to the corresponding vertical drive 314 to adjust the pressing stroke of the corresponding punch 313. At the same time, the pressure sensor 315 continues to send real-time pressure signals to the controller. When the data of all received pressure signals are consistent with the set value of welding pressure, that is, when the pressure parameter is qualified, the controller controls the power supply to output current to the electrode 312.

[0049] In step S500, the temperature sensor 316 in each group of hot-press welding components 310 sends the temperature signal sensed by the welding head 311 to the controller. The controller receives the temperature signals from multiple groups of temperature sensors 316 and compares them with the welding temperature setting value in step S100. If the received temperature signal data is inconsistent with the welding temperature setting value, that is, the temperature parameter is not qualified, the controller sends a command to the power supply to adjust the output current of the power supply to the electrode 312 corresponding to the temperature sensor 316. At the same time, the temperature sensor 316 continues to send real-time temperature signals to the controller. When the data of all received temperature signals are consistent with the welding temperature setting value, that is, the temperature parameter is qualified, the controller sends a command to the vertical drive 314 and the power supply to keep the welding head 311 at the welding pressure and welding temperature setting value for welding.

[0050] This welding method utilizes the aforementioned automated thermocompression welding equipment. Before welding, the various parameters of the automated thermocompression welding equipment are first set, especially the welding pressure and welding temperature settings. During the welding process, the number and positions of the working thermocompression welding assembly 310, the pins 411 of the magnetic head 410 to be welded, and the pads 511 of the FPC 510 are consistent. The pressure sensor 315 in each thermocompression welding assembly 310 can independently sense the downward pressure of its respective welding head 311 and send the pressure signal to the controller. The controller analyzes the data and adjusts the downward pressure of that group of welding heads 311 accordingly, ensuring that the pressure of all welding heads 311 remains consistent. The controller then independently supplies current to each solder head 311 to heat it. Each set of temperature sensors 316 can independently sense the temperature of its respective solder head 311 and send the temperature signal to the controller. After collecting the temperature data, the controller adjusts the temperature of each solder head 311 by adjusting the output current of the power supply, ensuring that the temperature of each solder head 311 remains consistent, thus achieving automatic parameter adjustment and personalized settings. Since the pressure and temperature on the pins 411 of each magnetic head 410 and the pads 511 of the FPC 510 are consistent, the welding quality can be guaranteed, avoiding defects such as cold solder joints, weak welds, or high-temperature weld burns. Since this method can monitor and independently control the pressure and temperature of each welding head 311 in real time, it is no longer necessary to invest too much manpower and resources to adjust and monitor the coplanarity of the pins 411 after the magnetic head 410 is assembled during the production and assembly process. It is also not necessary to require very precise material tray 610 groove 611 dimensions to limit the magnetic head 410. This can improve the production efficiency of the magnetic head 410 and material tray 610, reduce the production cost of the magnetic head 410 and material tray 610, and at the same time ensure welding quality and improve product quality.

[0051] It should be noted that in the description of this invention, any descriptions of orientation, such as up, down, front, back, left, right, etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the purpose of facilitating the description of this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and should not be construed as a limitation of this invention.

[0052] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number, while "above," "below," "within," etc. are understood to include the stated number. If "first" or "second" is mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0053] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0054] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. An automated hot-press welding device, characterized in that, Includes a power supply, controller, drive mechanism (200) and thermoforming mechanism (300). The drive mechanism (200) is connected to the thermo-welding mechanism (300) and electrically connected to the controller, for driving the thermo-welding mechanism (300) to move horizontally; The thermobaric welding mechanism (300) includes multiple independent thermobaric welding components (310). Each thermobaric welding component (310) includes a welding head (311), an electrode (312), a punch (313), and a vertical drive (314) connected in sequence. The thermobaric welding component (310) also includes a pressure sensor (315) and a temperature sensor (316). The vertical drive (314), the pressure sensor (315), and the temperature sensor (316) are all electrically connected to the controller. The power supply is electrically connected to the electrode (312) and the controller. The lower part of the electrode (312) is comparable to the size of the welding head (311). The middle part of the electrode (312) gradually increases from bottom to top and transitions to the upper part of the electrode (312). The pressure sensor (315) is used to sense the pressure of the welding head (311) pressing down on the pads (511) of the FPC (510) and the pins (411) of the magnetic head (410); the temperature sensor (316) is used to sense the temperature of the welding head (311); and the vertical drive (314) is used to drive the punch (313), the pole rod (312), and the welding head (311) to move vertically. The drive mechanism (200) includes a support frame (210) and a mounting plate (220). The mounting plate (220) is horizontally movably connected to the support frame (210). The hot-press welding assembly (310) also includes a fixing rod (317). One end of the fixing rod (317) is connected to the mounting plate (220), and the other end is connected to the vertical drive member (314).

2. The automated hot-press welding equipment according to claim 1, characterized in that, The fixing rods (317) in the multiple sets of hot-press welding assemblies (310) are staggered and connected to different positions of their respective vertical drive members (314).

3. The automated hot-press welding equipment according to claim 1, characterized in that, When the hot-press welding assembly (310) is distributed in more than two groups along the same straight line, the two pole rods (312) located on the two outer sides are inclined outward from bottom to top.

4. The automated hot-press welding equipment according to claim 1, characterized in that, The upper and lower ends of the pressure sensor (315) abut against the punch (313) and the electrode (312), respectively.

5. The automated hot-press welding equipment according to claim 1, characterized in that, The temperature sensor (316) is a thermocouple welded to the side of the welding head (311).

6. The automated hot-press welding equipment according to claim 1, characterized in that, The electrode (312) has a current input line (318) connected to its side, and the current input line (318) is connected to the power supply.

7. The automated hot-press welding equipment according to claim 1, characterized in that, It also includes a material tray (610), the drive mechanism (200) can drive the material tray (610) to move horizontally, and the material tray (610) has a plurality of grooves (611) for positioning and placing the magnetic head (410).

8. A hot-press welding method, characterized in that, The automated thermostatic welding equipment as described in any one of claims 1-7 includes the following steps: S100: Program and set the movement direction, step distance, welding pressure, welding temperature and welding time of the automated hot press welding equipment, and set the set values ​​of welding pressure and welding temperature. S200, the controller sends a command to the drive mechanism (200) to drive the thermobaric welding assembly (310) to move horizontally above the part to be welded; S300, the controller sends a command to the vertical drive (314) of all thermocompression welding assemblies (310) to drive the punch (313) to move downward, and the punch (313) pushes the electrode (312) and the welding head (311) downward so that the welding head (311) presses down on the pad (511) of the FPC (510) and the pin (411) of the magnetic head (410). S400, the pressure sensor (315) in each group of the hot press welding assembly (310) sends the pressure signal of the welding head (311) to the controller. The controller receives the pressure signals from multiple groups of pressure sensors (315) and compares the multiple pressure signals with the set value of welding pressure in step S100. If the data of the received pressure signal is inconsistent with the set value of welding pressure, the controller issues a command to the corresponding vertical drive (314) to adjust the downward stroke of the corresponding punch (313). When the data of all received pressure signals are consistent with the set value of welding pressure, the controller controls the power supply to output current to the electrode (312). S500, the temperature sensor (316) in each group of the hot press welding assembly (310) sends the temperature signal of the welding head (311) to the controller. The controller receives the temperature signals of multiple groups of temperature sensors (316) and compares the multiple temperature signals with the welding temperature setting value in step S100. If the data of the received temperature signal is inconsistent with the welding temperature setting value, the controller sends a command to the power supply to adjust the output current of the power supply to the electrode (312) corresponding to the temperature sensor (316). When the data of all received temperature signals are consistent with the welding temperature setting value, the controller sends a command to the vertical drive (314) and the power supply to make the welding head (311) maintain the welding pressure and welding temperature setting value for welding.

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