Automatic welding device

Abstract

The invention discloses an automatic welding device in the technical field of welding. The automatic welding device comprises a feeding system, a conveying system, a welding system and a discharging system. According to the feeding system, a mechanical arm recognizes the position of a to-be-welded ceramic wafer, and the to-be-welded ceramic wafer is grabbed from a ceramic wafer material disc and placed on a welding positioning platform; the conveying system pushes the positioning clamp, the positioning clamp is provided with an adjusting linear sliding assembly and a telescopic air cylinder which are used for clamping and positioning the ceramic wafer, and the ceramic wafer is clamped and positioned; the welding process of the welding system for the to-be-welded ceramic wafer comprises the steps of pre-pressing the platinum wire, cutting off the platinum wire according to the length, carrying out secondary pressurization on the basis of original pressing to reach the welding pressure and carrying out welding. The device disclosed by the invention is suitable for processing high-precision and high-reliability products such as temperature sensors, electronic components, measurement and control devices and the like for welding platinum wires on ceramic chips. The main working principle is that platinum is deposited on a ceramic substrate by high temperature and pressure through lead welding based on the basic characteristic that a platinum metal material changes along with the change of temperature.

Description

Technical Field

[0001] This invention relates to the field of welding technology, specifically to an automatic welding device. Background Technology

[0002] The global welding equipment market continues to expand, with a shortage of precision welding automation equipment and increasing demand. The welding industry is developing towards automation, greening, intelligence, and precision.

[0003] An automatic welding device is a piece of equipment that can automatically complete the welding work of soldering platinum wire onto ceramic sheets via lead wire.

[0004] It is a temperature sensor element that uses the property that the resistance of platinum metal changes with temperature to measure temperature, and it has wide applications in industry, scientific research and other fields. The main function of this device is to accurately, efficiently and stably solder it onto the corresponding circuit or component.

[0005] Current welding methods mostly use manual fixtures, resulting in poor weld consistency. The weld size is generally 0.5mm, the welding efficiency is 2s / cycle, the welding yield is about 85%, the welding function is limited, and the welding wire releases waste gas and residue.

[0006] However, current welding equipment still suffers from problems such as difficulty in achieving high-precision welding, reliance on manual operation, and limited equipment functionality.

[0007] Based on this, the present invention designs an automatic welding device to solve the above problems. Summary of the Invention

[0008] The purpose of this invention is to provide an automatic welding device to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: An automatic welding device includes a feeding system, a conveying system, a welding system, and an unloading system; the feeding system is provided by a robotic arm that identifies the position of the ceramic sheet to be welded, picks up the ceramic sheet to be welded from the ceramic sheet material tray, and places it onto the welding positioning platform; The conveying system uses positioning fixtures to clamp and position the ceramic sheets on the welding positioning platform; The welding system is installed on the conveying system. The platinum wire output from its output end is used in conjunction with the ceramic sheet on the positioning fixture. The welding process of the ceramic sheet to be welded is as follows: pre-press the platinum wire → cut the platinum wire according to the length → apply pressure again on the basis of the original pressing to reach the welding pressure → weld. The feeding system uses a robotic arm to identify the position of the ceramic sheet after welding and then pick up the finished product from the welding positioning platform and place it into the finished product material tray.

[0010] In a further embodiment, the feeding system includes an X-linear slide rail assembly and a Y-linear slide rail assembly. One end of the Y-linear slide rail assembly is mounted on the sliding end of the X-linear slide rail assembly, and the other end is mounted on a guide rail via a bracket. The X-linear slide rail assembly and the Y-linear slide rail assembly can independently move laterally along the X-axis and Y-axis. A Z-linear slide rail assembly is mounted on the sliding end of the Y-linear slide rail assembly, and the Z-linear slide rail assembly slides longitudinally along the Z-axis. A gripping robotic arm is mounted on the sliding end of the Z-linear slide rail assembly, and the gripping robotic arm is equipped with mechanical grippers. A ceramic sheet material tray is laid flat below the gripping robotic arm.

[0011] In a further embodiment, a set of ceramic sheet material trays is provided, each set including a feeding ceramic sheet material tray and a discharging ceramic sheet material tray. The feeding ceramic sheet material tray and the discharging ceramic sheet material tray are respectively installed on the feeding system for placing ceramic sheets to be welded and on the discharging system for placing ceramic sheets that have been welded.

[0012] In a further embodiment, the ceramic sheet material tray is provided with placement slots for placing ceramic sheets of different specifications, and the mechanical grippers can grasp the required type of ceramic sheets on the ceramic sheet material tray as needed.

[0013] In a further embodiment, the structure and function of the unloading system are the same as those of the loading system. The unloading system is formed by a robotic arm identifying the position of the welding positioning platform of the welded ceramic sheet and placing the welded ceramic sheet onto the unloading ceramic sheet material tray.

[0014] In a further embodiment, the conveying system includes a lead screw linear sliding assembly and a positioning fixture. The positioning fixture is mounted on the sliding end of the lead screw linear sliding assembly, and an adjustable linear sliding assembly for clamping and positioning ceramic sheets is installed on the positioning fixture.

[0015] In a further embodiment, the welding system includes a wire-holding spool, through which a platinum wire is threaded. The wire-holding spool is pulled and corrected by multiple sets of aligned correction wheels, moving the platinum wire from the wire exit end to above the welding point. An electric cutting shear is installed at the front end of the wire-holding spool, and a welding actuator performs welding. After welding is completed, the wire is automatically cut. The welding positioning platform is picked up by the robotic arm and placed on the moving linear slide rail assembly. The welding positioning platform can be moved to adjust the position of the ceramic pieces before and after the welding process. The welding actuator is equipped with a welding needle, which is located on one side of the welding positioning platform to weld the ceramic sheet and platinum wire to be welded.

[0016] The welding positioning platform is mounted on a movable linear slide rail assembly. The welding positioning platform can be moved to adjust the position of the ceramic pieces before and after the welding process. The welding system also includes a welding head, which is set on one side of the welding positioning platform to weld the ceramic sheet and platinum wire to be welded.

[0017] In a further embodiment, the positioning fixture first slightly pre-presses the platinum wire, then cuts the platinum wire to length using an electric cutting shear. The positioning fixture then applies pressure a second time on top of the initial pressure, and welding is performed after the welding pressure is reached.

[0018] In a further embodiment, the welding system also includes a high-definition CCD camera, which automatically identifies the location of the weld point to be spot welded according to a pre-programmed sequence of the product's shape. If there is no product at that location, the system automatically jumps to the next product for identification and operation. After the spot welding is completed, the system can detect whether the product welding is qualified.

[0019] In a further embodiment, the feeding system, conveying system, welding system, and unloading system are installed in a welding cabinet.

[0020] Compared with the prior art, the beneficial effects of the present invention are: This invention is an automatic welding device that utilizes the fundamental characteristic of platinum metal changing with temperature. Through wire bonding, platinum is deposited onto a ceramic substrate using high temperature and pressure. The product offers advantages such as a wide temperature measurement range, high accuracy, small size, and reliable operation.

[0021] This invention features an automated operating process, including automatic feeding (transporting the platinum resistance thermometer and the components to be welded to the welding position), automatic positioning (ensuring the accuracy of the welding position), automatic welding (using appropriate welding processes, such as laser welding or resistance welding, to complete the welding action), and automatic inspection (checking whether the welding quality meets the standards). Using this device can improve welding efficiency, ensure the consistency of welding quality, and reduce errors and instabilities that may be caused by manual operation.

[0022] This invention achieves a weld spot size of 0.1mm, a welding efficiency of 10ms / time, good consistency, and uses an automatic welding fixture (with visual positioning). The welding yield is 99%, and the welding functionality is diversified and centralized, with no release of solder, waste gas, or residue. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the invention installed in a welding cabinet; Figure 2 This is the front view of the present invention; Figure 3 This is a top view of the feeding system, conveying system, welding system, and unloading system of the present invention; Figure 4 This is a schematic diagram of the feeding system structure of the present invention; Figure 5 This is a schematic diagram of the positioning fixture and welding needle structure of the present invention; Figure 6 This is a schematic diagram of the welding needle structure of the present invention; Figure 7 This is a schematic diagram of the welding actuator of the present invention. Figure 8 This is a schematic diagram of the welding system and welding positioning platform of the present invention; Figure 9 This is a schematic diagram of the welding system structure of the present invention.

[0025] The attached diagram lists the components represented by each number as follows: 1-Feeding system, 101-X linear slide rail assembly, 102-Y linear slide rail assembly, 103-Bracket, 104-Guide rail, 105-Z linear slide rail assembly, 106-Gripping robotic arm; 2-Conveying system, 201-Screw linear sliding assembly, 202-Positioning fixture, 203-Adjusting linear sliding assembly; 3-Welding system, 301-Wire holder, 302-Correction wheel, 303-Wire exit end, 304-Electric cutting shears, 305-Welding actuator; 4- Feeding system; 5-Ceramic disc material tray; 6-Welding positioning platform, 601-Moving linear slide rail assembly; 7- Welding needle; 8-High-definition CCD camera; 9-Welding cabinet; Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figure 1-8 The present invention provides a technical solution: an automatic welding device, comprising a feeding system 1, a conveying system 2, a welding system 3, and a discharging system 4; The feeding system 1 uses a robotic arm to identify the position of the ceramic sheet to be welded, grab the ceramic sheet to be welded from the ceramic sheet material tray 5 and place it on the welding positioning platform 6. The conveying system 2 advances the positioning fixture, allowing for fine-tuning of the ceramic sheet's position for clamping and positioning. The welding process of the welding system 3 for the ceramic sheet to be welded is as follows: pre-pressing the platinum wire → cutting the platinum wire according to the length → applying pressure a second time on the basis of the original pressing to reach the welding pressure → welding; The feeding system 4 uses a robotic arm to identify the position of the ceramic sheet after welding and then picks up the finished product from the welding positioning platform 6 and places it into the feeding ceramic sheet material tray.

[0028] Specifically, the overall structure of the device is as follows: The device mainly consists of a feeding system 1, a conveying system 2, a welding system 3, and a discharging system 4. All four systems are integrated and installed inside the welding cabinet 11, and the fully automated operation from raw material feeding to finished product discharging is achieved through coordinated control.

[0029] Among them, the main function of the feeding system 1 is to accurately grasp and position the material for transport. The feeding system 1 uses a multi-axis linkage robotic arm to automatically grasp and transfer ceramic sheets. Its core structure includes an X-axis linear guide rail assembly 101, a Y-axis linear guide rail assembly 102, a Z-axis linear guide rail assembly 105, and a grasping robotic arm 106. The specific working mechanism is as follows: Multi-axis linkage control: One end of the Y linear slide rail assembly 102 is installed on the sliding end of the X linear slide rail assembly 101, and the other end is mounted on the guide rail 104 through the bracket 103, which can independently complete the lateral movement in the X and Y axis directions; the Z linear slide rail assembly 105 is installed on the sliding end of the Y linear slide rail assembly 102 and is responsible for the longitudinal sliding of the Z axis. The three work together to achieve precise positioning in three-dimensional space, with a positioning accuracy of ±0.01mm.

[0030] Grasping actuator: The gripping robotic arm 106 is installed on the sliding end of the Z linear slide rail assembly 105. The mechanical gripper at its end is equipped with high-precision pneumatic control, which can achieve rotation at a certain angle, making it convenient to load and unload ceramic sheets, and can stably grip the welding positioning platform 6.

[0031] Material supply adaptation: A ceramic sheet material tray 5 is laid flat below the gripping robotic arm 106. There is a set of ceramic sheet material trays 5, each set including a feeding ceramic sheet material tray and a discharging ceramic sheet material tray. The feeding ceramic sheet material tray and the discharging ceramic sheet material tray are respectively installed on the feeding system 1 for placing ceramic sheets to be welded and on the discharging system 4 for placing ceramic sheets that have been welded. The mechanical gripper can automatically adapt to grip ceramic sheets of the corresponding specifications according to production needs, and locate the specific position of the ceramic sheet to be gripped through visual recognition technology.

[0032] Among them, the main function of the conveying system 2 is to provide stable transfer and precise positioning; The conveying system 2 is responsible for transferring the ceramic sheet from the positioning position to the welding position, and is also responsible for the initial clamping and positioning of the ceramic sheet. The core structure includes the lead screw linear sliding assembly 201 and the positioning fixture 202. High-precision transfer: The positioning fixture 202 is installed on the sliding end of the lead screw linear sliding assembly 201. It achieves smooth transfer through lead screw drive. The transfer speed can be adjusted according to the production cycle, up to 50mm / s.

[0033] The conveying system 2 includes a lead screw linear sliding assembly 201 and a positioning clamp 202. The positioning clamp 202 is installed on the sliding end of the lead screw linear sliding assembly 201, and an adjustable linear sliding assembly 203 for clamping and positioning ceramic pieces is installed on the positioning clamp 202.

[0034] The welding system 3 includes a wire-holding spool 301, in which a platinum wire is threaded. The wire-holding spool 301 is pulled and corrected by multiple sets of aligned correction wheels 302, and the platinum wire is brought from the wire exit end 303 to above the welding point. An electric cutting shear 304 is installed at the front end of the wire-holding spool 301. The welding execution mechanism 305 performs welding and automatically cuts the wire after welding is completed. The welding positioning platform 6 is placed on the moving linear slide rail assembly 601 after being grasped by the robotic arm. The welding positioning platform 6 can be moved to adjust the position of the ceramic sheet before and after the welding process. The welding actuator 305 is equipped with a welding needle 7, which is located on one side of the welding positioning platform 6 to weld the ceramic sheet and platinum wire to be welded.

[0035] Among them, welding system 3: its main functions are precision welding and intelligent control; Welding system 3 is the core working unit of the device. It achieves high-quality welding of platinum wire and ceramic sheet through multi-stage collaboration. It mainly includes a wire holding mechanism, a cutting mechanism, a welding execution mechanism, and a monitoring system. Stable supply of platinum wire: The platinum wire in the wire-holding drum 301 is pulled and corrected by multiple sets of correction wheels 302 (correction accuracy up to 0.005mm), and is accurately fed from the wire exit end 303 to the welding point to ensure that the straightness of the platinum wire meets the welding requirements.

[0036] In terms of design, the welding needle 7 on the welding actuator 305 is crucial for the formation of weld points. Therefore, research was conducted on material composition, the amount of trace elements added during smelting, and the processing and quenching, and welding needle materials suitable for each welding state were selected.

[0037] Step-by-step welding process: The welding needle 7 is slightly pre-compressed with platinum wire to ensure close contact with the ceramic sheet; The electric cutting shears (304 stainless steel) cut the platinum wire to a preset length (adjustable via the control system, range 0.5-5mm). The welding needle 7 is pressurized a second time to the preset welding pressure (5-20N adjustable); Welding needle 7 initiates welding, completing the connection between the platinum wire and the ceramic sheet.

[0038] Intelligent positioning adjustment: The welding positioning platform 6 is installed on the mobile linear slide rail assembly 601. It can finely adjust its position according to the recognition result of the high-definition CCD camera 8. The CCD camera automatically identifies the welding point position according to the pre-programmed program. If no product is detected, it will automatically jump to the next station. The positioning response time is ≤0.1s. After welding is completed, the camera can detect the welding quality of the product.

[0039] Full parameter monitoring: The welding monitoring equipment 10 detects the discharge energy (error ≤ ±2%), discharge time (accuracy 0.01ms) and welding pressure in real time during welding. Through closed-loop control, it ensures that the welding penetration depth is stable within the range of 0.05-0.2mm, eliminating defects such as incomplete welding and over-welding.

[0040] Material feeding system 4: Its function is to automate material receiving and close the process loop; The unloading system 4 adopts the same structural design and control logic as the loading system 1. Through a robotic arm and visual recognition technology, it picks up the welded ceramic sheet from the welding positioning platform 6 and accurately transfers it to the finished product material tray. Its collaborative operation with the loading system realizes full automation of the "raw material loading - welding processing - finished product unloading" process without human intervention.

[0041] This invention boasts system synergy and overall advantages: all systems are linked through a central control system; the feeding and unloading systems achieve automated material flow; the conveying system ensures precise workpiece positioning; and the welding system guarantees welding quality through intelligent monitoring. The entire device is compatible with welding ceramic sheets of various specifications (width 3-20mm, thickness 0.5-3mm), with a single-station welding cycle of ≤3s and a defect rate controlled below 0.1%, significantly improving production efficiency and consistency.

[0042] In terms of welding applications, this invention can be applied to various fields, such as: in the 3C industry, for mobile phone and computer speakers, receivers, lenses, and vibration motors; in the electronic components industry, for chips, circuit boards, various sensors, coils, and proximity cards; in biomedical devices, for micro-assemblies, micro-sensors, performance converters, and special modules; and in military and aerospace research institutes, for cochlear implants, intravascular sensors, and cardiac pulsation devices.

[0043] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An automatic welding device, characterized in that: It includes a feeding system (1), a conveying system (2), a welding system (3) and a unloading system (4); the feeding system (1) is a robotic arm that identifies the position of the ceramic sheet to be welded, grabs the ceramic sheet to be welded from the ceramic sheet material tray (5) and places it on the welding positioning platform (6). The conveying system (2) clamps and positions the ceramic pieces on the welding positioning platform (6) using a positioning fixture (202); The welding system (3) is installed on the conveying system (2). The platinum wire output from its output end is used in conjunction with the ceramic sheet on the positioning fixture (202). The welding process of the ceramic sheet to be welded is as follows: pre-press the platinum wire → cut the platinum wire according to the length → apply pressure a second time on the basis of the original pressing to reach the welding pressure → weld. The feeding system (4) uses a robotic arm to identify the position of the ceramic sheet after welding and then picks up the finished product from the welding positioning platform (6) and places it into the finished product material tray.

2. The automatic welding device according to claim 1, characterized in that: The feeding system (1) includes an X linear slide rail assembly (101) and a Y linear slide rail assembly (102). One end of the Y linear slide rail assembly (102) is mounted on the sliding end of the X linear slide rail assembly (101), and the other end is mounted on the guide rail (104) via a bracket (103). The X linear slide rail assembly (101) and the Y linear slide rail assembly (102) can move independently along the X and Y axes. A Z linear slide rail assembly (105) is mounted on the sliding end of the Y linear slide rail assembly (102). The Z linear slide rail assembly (105) slides longitudinally along the Z axis. A gripping robotic arm (106) is mounted on the sliding end of the Z linear slide rail assembly (105). A mechanical gripper is mounted on the gripping robotic arm (106). A ceramic sheet material tray (5) is laid flat below the gripping robotic arm (106).

3. The automatic welding device according to claim 2, characterized in that: The ceramic sheet material tray (5) is provided in a set, each set including a feeding ceramic sheet material tray and a discharging ceramic sheet material tray. The feeding ceramic sheet material tray and the discharging ceramic sheet material tray are respectively installed on the feeding system (1) for placing ceramic sheets to be welded and on the discharging system (4) for placing ceramic sheets that have been welded.

4. The automatic welding device according to claim 3, characterized in that: The ceramic material tray (5) is provided with placement slots for placing ceramic pieces of different specifications. The mechanical grippers grab the required type of ceramic pieces on the feeding ceramic material tray according to the needs.

5. The automatic welding device with a temperature sensor according to claim 1, characterized in that: The structure and function of the unloading system (4) are the same as those of the loading system (1). The unloading system (4) is formed by a robotic arm that identifies the position of the welding positioning platform (6) of the welded ceramic sheet and places the welding positioning platform (6) of the welded ceramic sheet into the unloading ceramic sheet material tray.

6. The automatic welding device according to claim 1, characterized in that: The conveying system (2) includes a lead screw linear sliding assembly (201) and a positioning clamp (202). The positioning clamp (202) is installed on the sliding end of the lead screw linear sliding assembly (201), and an adjustable linear sliding assembly (203) for clamping and positioning ceramic pieces is installed on the positioning clamp (202).

7. An automatic welding device according to claim 1, characterized in that: The welding system (3) includes a wire-holding spool (301), in which a platinum wire is threaded. The wire-holding spool (301) is pulled and corrected by multiple sets of alignment wheels (302) and reaches above the welding point from the wire exit end (303). An electric cutting shear (304) is installed at the front end of the wire-holding spool (301). The welding execution mechanism (305) performs welding and automatically cuts the wire after welding is completed. The welding positioning platform (6) is placed on the moving linear slide rail assembly (601) after being grasped by the robot arm. The welding positioning platform (6) can be moved to adjust the position of the ceramic sheet before and after the welding process. The welding actuator (305) is equipped with a welding needle (7), which is set on one side of the welding positioning platform (6) to weld the ceramic sheet to be welded and the platinum wire.

8. An automatic welding device according to claim 6, characterized in that: The positioning fixture (202) first slightly pre-presses the platinum wire, and then the electric cutting shears (304) cut the platinum wire according to the length. The positioning fixture (202) applies pressure a second time on the basis of the original pressing, and then welding is carried out after reaching the welding pressure.

9. An automatic welding device according to claim 1, characterized in that: The welding system (3) also includes a high-definition CCD camera (8), which automatically identifies the location of the spot weld according to the pre-programmed product shape; if there is no product at the location, it automatically jumps to the next product for identification and operation; after the spot weld is completed, it can detect whether the product welding is qualified.

10. An automatic welding device according to claim 1, characterized in that: The feeding system (1), conveying system (2), welding system (3) and unloading system (4) are installed in the welding cabinet (10).

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