Traceless welding process equipment

Abstract

The invention relates to the technical field of projection welding equipment, and discloses traceless welding process equipment which comprises a stamping projection welding process, and the stamping projection welding process comprises stamping projection equipment used for performing stamping projection on an inner plate so as to form a welding convex rib at a welding point of the inner plate and a welding system used for performing welding operation on the inner plate and a workpiece outer plate; the welding system comprises a welding gun, a welding controller and a welding monitor. According to the seamless welding process equipment, for the setting of a stamping projection welding process, a welding convex rib is stamped on an inner plate through stamping projection equipment, so that the contact surface between the welding convex rib and an outer plate of a workpiece can be effectively improved, and the welding current density can be achieved within extremely short time to achieve the purpose of welding fusion; therefore, reliable welding quality can be achieved by means of small energy input, meanwhile, the problem that thermal deformation and welding spot indentation are extremely prone to being formed on the inner plate or the outer plate of the workpiece through traditional resistance welding is solved, and the inner plate or the outer plate of the workpiece shows good appearance surface quality.

Description

Technical Field

[0001] This application relates to the field of projection welding equipment technology, and more particularly to a non-marking welding process equipment. Background Technology

[0002] As the automotive industry places increasingly higher demands on the surface quality of automotive parts, traditional resistance welding, due to its high-energy-consuming thermal effect welding process, is prone to causing thermal deformation and weld indentations on the surface of parts. This results in dents and severely damages the plating and decorative layers on the surface of the parts, causing the surface of the parts to fail to meet the corresponding quality requirements. At the same time, traditional resistance welding has a long operation cycle (generally more than 10 cycles, and the welding current is generally below 12kA), which makes it relatively inefficient for welding parts, with high energy consumption, poor stability and reliability.

[0003] Therefore, there is an urgent need for a component welding equipment for the automotive industry to solve the defects of traditional resistance welding when welding automotive components. Summary of the Invention

[0004] This application proposes a seamless welding process equipment that achieves welding fusion in a very short time with minimal energy input. While ensuring welding quality, it also produces parts with good surface finish. Furthermore, it boasts advantages such as high welding efficiency and low energy consumption. This addresses the problems of traditional resistance welding, which employs high-energy-consuming thermal effect welding processes. These processes easily lead to thermal deformation and weld indentations on the surface of parts, resulting in dents and severely damaging the plating and decorative layers, thus preventing the parts from meeting the required quality standards. Additionally, traditional resistance welding has a long operation cycle, resulting in low welding efficiency and high energy consumption.

[0005] To achieve the above objectives, this application adopts the following technical solution: a non-marking welding process equipment, including a stamping projection welding process, which improves the welding conditions of the inner plate, optimizes the welding parameters, and monitors the welding process to achieve non-marking welding between the inner plate and the outer plate of the workpiece. The stamping projection welding process includes a stamping device for stamping the inner plate to form welding ribs at its welding points and a welding system for welding the inner plate and the outer plate of the workpiece. At the same time, by stamping welding ribs on the inner plate by the stamping device, the welding contact surface between the inner plate and the outer plate of the workpiece can be effectively improved, and the welding current density can be reached in a very short time to achieve the purpose of welding fusion. Thus, reliable welding quality can be achieved with very little energy input, while the outer plate of the workpiece can also present a good appearance quality. The welding system includes a welding torch, a welding controller, and a welding monitoring instrument. The welding torch includes a welding torch body fixedly mounted on a robotic arm, and the welding torch can be moved to the welding point between the inner plate and the outer plate of the workpiece by the robotic arm. An L-shaped welding clamp is fixedly mounted on one side of the bottom end of the welding torch body, and a power cylinder group is provided on the right side inside the welding torch body. An electrode assembly that conducts current and can apply corresponding pressure to the welding point is fixedly mounted on the drive shaft of the power cylinder group. The welding controller forms a control connection with the welding torch, and is used to set and output the current and pressure parameters output by the electrode assembly on the welding torch. The welding monitoring instrument forms an electrical feedback connection with the welding torch, which is used to collect, transmit and provide feedback on current and pressure data during the welding process, so as to establish a welding data traceability system for the welding process equipment, and thus provide effective data support for production quality control.

[0006] The stamping projection welding process first uses a stamping device in the preceding station to punch welding ribs on the inner plate, and then transfers them to the welding station. The welding controller regulates the power cylinder group so that the electrode assembly on its drive shaft applies pressure to the welding point between the welding rib on the inner plate and the outer plate of the workpiece, causing the welding rib to be fully pressed together with the outer plate of the workpiece. Then, the electrode assembly is triggered to generate a corresponding current to perform the welding operation. At the same time, the current and pressure data during the welding process are monitored and fed back in real time by a welding monitoring instrument.

[0007] Furthermore, a pressure sensor and a current sensor are provided on the welding torch, and an electrical feedback connection is formed between the pressure sensor, the current sensor and the welding monitoring instrument. Thus, the current and pressure of the welding process equipment during the welding process are collected, transmitted and fed back through the pressure sensor and the current sensor.

[0008] Furthermore, the welding monitoring instrument is equipped with a human-machine interface unit, and the human-machine interface unit is electrically connected to the welding controller. Thus, the current and pressure parameters of the welding torch on the welding process equipment can be set and output directly through the human-machine interface unit, so that it can be used for welding operations between inner plates and outer plates of different materials and specifications. The operation is simple and convenient.

[0009] Furthermore, the welding torch also includes a pressure assembly, which further includes a sliding connecting plate fixedly mounted on the inner wall of the welding gun by bolts. A U-shaped bracket is slidably connected to one side of the sliding connecting plate. A support plate is fixedly installed at the bottom of the U-shaped bracket, and a pressure block for sealing the bottom of the welding rib of the inner plate is provided at the top of the support plate. This prevents the molten welding rib from flowing downward and failing to make effective contact with the outer plate of the workpiece over a large area, thus preventing a decrease in the welding strength between the inner plate and the outer plate of the workpiece. This further improves the welding quality between the inner plate and the outer plate of the welding process equipment.

[0010] Furthermore, a power cylinder assembly is fixedly installed at the top of the U-shaped bracket, and an electrode assembly that conducts current and applies corresponding pressure to the welding point is fixedly installed on the drive shaft of the power cylinder assembly. By arranging the power cylinder assembly and the electrode assembly on it on the U-shaped bracket, when the power cylinder assembly is triggered and drives the electrode assembly to move downward and make contact with the outer plate of the workpiece, the U-shaped bracket and the top pressure block on it can be forced to move upward under the linkage transmission of the U-shaped bracket and the sliding connecting plate. This causes the top pressure block to make extrusion contact with the bottom of the welding rib on the inner plate and form an automated linkage control without human intervention.

[0011] Furthermore, a set of elastic connecting rods is provided at both ends inside the support plate. Initially, the top of the elastic connecting rod is flush with the top of the top pressing block. When the support plate moves upward, the top of the elastic connecting rod contacts the bottom of the inner plate and is compressed. When the support plate moves downward and returns to the initial position, the top pressing block will actively detach from the welded ribs on the inner plate under the elastic force of the elastic connecting rod.

[0012] Furthermore, the top pressure block is made of a material with a melting point higher than that of the inner plate, which can effectively prevent the top pressure block from melting due to excessive welding temperature when the welding equipment is used to weld the inner plate and the outer plate of the workpiece, thereby further improving the stability and reliability of the welding equipment during operation.

[0013] The beneficial effects of this invention are as follows: 1. The non-marking welding process equipment provided in this application, for the setting of the stamping projection welding process, punches out welding ribs on the inner plate by the punching equipment, which can effectively improve the welding contact surface between it and the outer plate of the workpiece, and can achieve the welding current density in a very short time to achieve the purpose of welding fusion. Thus, reliable welding quality can be achieved with very little energy input. At the same time, it effectively avoids the problem of thermal deformation and weld indentation on the inner plate or outer plate of the workpiece that is easy to form in traditional resistance welding, so that the inner plate or outer plate of the workpiece presents a good appearance quality.

[0014] 2. The non-marking welding process equipment provided in this application can use the top pressure block to seal the bottom of the welding rib of the inner plate for the setting of the top pressure component and its upper structure, so as to prevent the molten welding rib from flowing downward and failing to make large-area effective contact with the outer plate of the workpiece, thus preventing the welding strength between the inner plate and the outer plate of the workpiece from decreasing. This further improves the welding quality between the inner plate and the outer plate of the workpiece by the welding process equipment. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort: Figure 1 This is a simplified system diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the welding torch body of the present invention; Figure 3 This is a front view of the welding torch body of the present invention; Figure 4 This is a schematic diagram of the structure of the top pressure assembly of the present invention; Figure 5 This is a front view of the top pressure assembly of the present invention.

[0016] In the diagram: 1-Welding torch body, 2-Welding clamp, 3-Power cylinder assembly, 4-Electrode assembly, 5-U-shaped bracket, 6-Sliding connecting plate, 7-Support plate, 8-Top pressure block, 9-Elastic connecting rod. Detailed Implementation

[0017] 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.

[0018] like Figure 1As shown, a non-marking welding process equipment includes a stamping projection welding process. By improving the welding conditions of the inner plate, optimizing the welding parameters, and monitoring the welding process, non-marking welding operations between the inner plate and the outer plate of the workpiece can be achieved. The stamping projection welding process includes a stamping device for stamping the inner plate to form welding ribs at its welding points and a welding system for welding the inner plate and the outer plate of the workpiece. At the same time, by stamping welding ribs on the inner plate by the stamping device, the welding contact surface between the inner plate and the outer plate of the workpiece can be effectively improved, and the welding current density can be reached in a very short time to achieve the purpose of welding fusion. Thus, reliable welding quality can be achieved with very little energy input, while the outer plate of the workpiece can also present a good appearance quality. The welding system includes a welding torch, a welding controller, and a welding monitoring instrument. like Figure 2 , Figure 3 As shown, the welding torch includes a welding torch body 1 fixedly mounted on a robotic arm, and the welding torch can be moved to the welding point between the inner plate and the outer plate of the workpiece by the robotic arm. An L-shaped welding clamp 2 is fixedly mounted on one side of the bottom end of the welding torch body 1, and a power cylinder group 3 is provided on the right side inside the welding torch body 1. An electrode assembly 4 is fixedly mounted on the drive shaft of the power cylinder group 3, which plays the role of conducting current and can apply corresponding pressure to the welding point. The welding controller forms a control connection with the welding torch, and is used to set and output the current and pressure parameters output by the electrode assembly 4 on the welding torch. The welding monitoring instrument forms an electrical feedback connection with the welding torch, which is then used to collect, transmit, and provide feedback on current and pressure data during the welding process. This establishes a welding data traceability system for the welding equipment, thereby providing effective data support for production quality control.

[0019] The stamping projection welding process first uses a stamping equipment in the preceding station to punch out welding ribs on the inner plate, and then transfers them to the welding station. The welding controller regulates the power cylinder group 3 so that the electrode assembly 4 on its drive shaft applies pressure to the welding point between the welding rib on the inner plate and the outer plate of the workpiece, causing the welding rib to be fully pressed together with the outer plate of the workpiece. Then, the electrode assembly 4 is triggered to generate a corresponding current to perform the welding operation. At the same time, the welding monitoring instrument monitors and feeds back the current and pressure data in real time during the welding process.

[0020] In this technical solution, a pressure sensor and a current sensor are provided on the welding torch, and an electrical feedback connection is formed between the pressure sensor, the current sensor and the welding monitoring instrument. In this way, the current and pressure of the welding process equipment during the welding process are collected, transmitted and fed back through the pressure sensor and the current sensor.

[0021] In this technical solution, a human-machine interaction unit is provided on the welding monitoring instrument, and an electrical control connection is formed between the human-machine interaction unit and the welding controller. Thus, the current and pressure parameters of the welding torch on the welding process equipment can be set and output directly through the human-machine interaction unit, so that it can be used for welding operations between inner plates and outer plates of different materials and specifications. The operation is simple and convenient.

[0022] like Figure 1 , Figure 2 as well as Figure 4 As shown, in this technical solution, the welding torch also includes a top pressure assembly, which further includes a sliding connecting plate 6 fixedly installed on the inner wall of the welding clamp 2 by bolts. A U-shaped bracket 5 is slidably connected to one side of the sliding connecting plate 6. A support plate 7 is fixedly installed at the bottom of the U-shaped bracket 5, and a top pressure block 8 is provided at the top of the support plate 7 to seal the bottom of the welding rib of the inner plate. This prevents the molten welding rib from flowing downward and failing to make effective contact with the outer plate of the workpiece over a large area, thus preventing a decrease in the welding strength between the inner plate and the outer plate of the workpiece. This further improves the welding quality between the inner plate and the outer plate of the welding process equipment.

[0023] like Figure 4 , Figure 5 As shown, in this technical solution, a power cylinder group 3 is fixedly installed at the top of the U-shaped bracket 5, and an electrode assembly 4, which conducts current and applies corresponding pressure to the welding point, is fixedly installed on the drive shaft of the power cylinder group 3. By arranging the power cylinder group 3 and the electrode assembly 4 on it on the U-shaped bracket 5, when the power cylinder group 3 is triggered and drives the electrode assembly 4 to move downward and make contact with the outer plate of the workpiece, under the linkage transmission of the U-shaped bracket 5 and the sliding connecting plate 6, the U-shaped bracket 5 and the top pressure block 8 on it can be forced to move upward, so that the top pressure block 8 makes extrusion contact with the bottom of the welding rib on the inner plate and forms an automated linkage control without human intervention.

[0024] In this technical solution, a set of elastic connecting rods 9 are provided at both ends inside the support plate 7. The top end of the elastic connecting rod 9 is initially flush with the top end of the top pressing block 8. When the support plate 7 moves upward, the top end of the elastic connecting rod 9 contacts the bottom end of the inner plate and is compressed. When the support plate 7 moves downward and returns to the initial position, the top pressing block 8 will actively detach from the welded ribs on the inner plate under the elastic force of the elastic connecting rod 9.

[0025] In this technical solution, the top pressure block 8 is made of a material with a melting point greater than that of the inner plate, which can effectively prevent the top pressure block 8 from melting due to excessive welding temperature when the welding equipment is used to weld the inner plate and the outer plate of the workpiece, thereby further improving the stability and reliability of the welding equipment during operation.

[0026] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A seamless welding process equipment, including a stamping projection welding process, characterized in that: The stamping projection welding process includes a stamping device for stamping the inner plate to form welding ribs at its welding points and a welding system for welding the inner plate and the outer plate of the workpiece. The welding system includes a welding torch, a welding controller, and a welding monitoring instrument. The welding torch includes a welding torch body (1) fixedly mounted on a robotic arm. A welding clamp (2) is fixedly mounted on one side of the bottom end of the welding torch body (1). A power cylinder group (3) is provided on the right side inside the welding torch body (1). An electrode assembly (4) is fixedly mounted on the drive shaft of the power cylinder group (3). The welding controller forms a control connection with the welding torch, and is used to set and output the current and pressure parameters output by the electrode assembly (4) on the welding torch; The welding monitoring instrument forms an electrical feedback connection with the welding torch, and is used to collect, transmit and provide feedback on current and pressure data during the welding process.

2. The seamless welding process equipment according to claim 1, characterized in that, The welding torch is equipped with a pressure sensor and a current sensor, and the pressure sensor, the current sensor and the welding monitor are connected by an electrical feedback connection.

3. The seamless welding process equipment according to claim 2, characterized in that, The welding monitoring instrument is equipped with a human-machine interaction unit, and the human-machine interaction unit and the welding controller are electrically connected.

4. The seamless welding process equipment according to claim 1, characterized in that, The welding torch also includes a pressure assembly, which includes a sliding connecting plate (6) fixedly installed on the inner wall of the welding clamp (2) by bolts. A U-shaped bracket (5) is slidably connected to one side of the sliding connecting plate (6). A support plate (7) is fixedly installed at the bottom inside the U-shaped bracket (5), and a pressure block (8) for sealing the bottom of the welding rib of the inner plate is provided at the top of the support plate (7).

5. The seamless welding process equipment according to claim 4, characterized in that, A power cylinder assembly (3) is fixedly installed at the top of the U-shaped bracket (5), and an electrode assembly (4) is fixedly installed on the drive shaft of the power cylinder assembly (3).

6. The seamless welding process equipment according to claim 5, characterized in that, The support plate (7) has a set of elastic connecting rods (9) at both ends. The top of the elastic connecting rod (9) is initially flush with the top of the top of the top block (8). When the support plate (7) moves upward, the top of the elastic connecting rod (9) contacts the bottom of the inner plate and is compressed. When the support plate (7) moves downward and returns to the initial position, the top block (8) will actively detach from the welded ribs on the inner plate under the elastic force of the elastic connecting rod (9).

7. The seamless welding process equipment according to claim 6, characterized in that, The top pressure block (8) is made of a material with a melting point greater than that of the inner plate.

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