A system and method for assisting in the removal of large projection welded parts

Abstract

The present application belongs to the technical field of resistance projection welding, and relates to an auxiliary ejection system and method for large projection-welded parts, which comprises an upper electrode detection device, an ejection device, a three-in-one part and a two-position five-way electromagnetic valve, and can smoothly eject the workpiece after the projection-welded workpiece is welded. The upper electrode detection device is composed of an upper electrode detection switch support, an upper electrode in-place detected bolt and an upper electrode in-place detection switch. The ejection device is composed of three connecting plates, a gas cylinder, a top block, an ejection device detection support, an ejection device detection switch and an ejection device in-place detected bolt. The auxiliary ejection system for large projection-welded parts can eject the workpiece through gas circuit control when the large workpiece is projection-welded. The ejection system has simple structure, convenient processing and low manufacturing cost, reduces labor intensity, eliminates safety hazards and quality defect hazards of workpiece deformation, improves production efficiency, shortens the project development cycle and reduces development cost.

Description

Technical Field

[0001] This invention belongs to the field of resistance projection welding technology, specifically relating to an auxiliary part removal system, and particularly to an auxiliary part removal system and method for large projection welded parts. Background Technology

[0002] With the development of industrial automation, factories are constantly raising their requirements for equipment production efficiency and product quality, while also trying to keep costs within a reasonable range. Welding large and heavy parts can lead to high labor intensity for workers, and fatigue during operation can cause safety hazards, resulting in quality defects such as deformation and scratches, severely impacting production efficiency and workpiece quality.

[0003] Existing technology discloses a projection welding machine device, including a projection welding machine body, an upper electrode arm, a lower electrode holder, an upper electrode, a lower electrode, and a controller. The upper electrode is mounted on the projection welding machine body via the upper electrode arm, and the lower electrode is mounted on the projection welding machine body via the lower electrode holder and located below the upper electrode. Both the lower electrode holder and the upper electrode arm are connected to the projection welding machine body via slide rails. The controller is located on the side wall of the projection welding machine body and is connected to the lower electrode holder and the upper electrode arm via internal circuitry. However, after welding, large projection welded parts are difficult to remove. Existing technology also discloses an intelligent multi-purpose projection welding device, including a workpiece support, a projection welding machine, a welding controller, a PLC control cabinet, and a human-machine interface device. The workpiece support includes a first workpiece proximity switch and a second workpiece proximity switch; the electrode part of the projection welding machine includes a first standard part hole, a second standard part hole, a first standard part proximity switch, and a second standard part proximity switch. By adding a standard part hole to the lower electrode, the device can process different types of standard parts without changing the electrode. However, this device also cannot smoothly eject the workpiece after the projection welding is completed.

[0004] Meanwhile, using robots equipped with tooling to grip and weld workpieces can ensure both production efficiency and workpiece quality. However, the investment costs for robots, tooling, and PLC communication systems are high, and the project duration is long. Therefore, how to reduce the labor intensity of projection welding of large parts, improve production efficiency, and reduce project investment costs has become an urgent problem for those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide an auxiliary ejection system for large projection welded parts with positioning detection function and pneumatic control, and to provide an ejection method for the above-mentioned auxiliary ejection system, so as to solve the problem that large projection welded parts are not easy to remove after welding. The system enables the workpiece to be smoothly ejected after the projection welded parts are welded. The system reduces the labor intensity of operators, increases the production cycle, eliminates safety hazards caused by improper operation, and avoids quality defects caused by part size deformation or scratches.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] An auxiliary ejection system for large projection welded parts includes an upper electrode detection device 1, an ejection device 2, a triplet 3, and a two-position five-way solenoid valve 4, which can smoothly eject the workpiece after the projection weld is completed.

[0008] The upper electrode detection device 1 includes an upper electrode detection switch bracket 1-1 connected to the upper part of the projection welding machine 6, on which an upper electrode position detection switch 1-3 is connected. It also includes an upper electrode position detection bolt 1-2 connected to the connecting plate of the upper electrode arm of the projection welding machine 6. The connecting plate is connected to the cylinder piston rod, so that the upper electrode position detection bolt 1-2 can move up and down with the cylinder piston rod. After the upper electrode detection device 1 detects that the upper electrode 9 is pressed into place, the upper electrode position detection bolt 1-2 reaches the position of the upper electrode position detection switch 1-3, the indicator light of the upper electrode position detection switch 1-3 lights up, and a feedback signal is sent to the projection welding machine 6.

[0009] The ejection device 2 includes a connecting plate I 2-1 connected to the body of the projection welding machine 6, a cylinder 2-2 connected to the connecting plate I 2-1, a connecting plate II 2-3 connected to the connecting structure of the cylinder 2-2, a connecting plate III 2-4 connected to the connecting plate II 2-3, and a top block 2-5 connected to the connecting plate III 2-4; it also includes an ejection device detection bracket 2-6, an ejection device detection switch 2-7 connected to the ejection device detection bracket 2-6, and an ejection device positioning detection bolt 2-8 connected to the connecting plate II 2-3; when the cylinder 2-2 extends, it can sequentially drive the connecting plate II 2-3, the connecting plate III 2-4, and the top block 2-5 to extend as well; after the top block 2-5 is ejected into place, the ejection device detection switch 2-7 detects the ejection device positioning detection bolt 2-8, the indicator light of the ejection device detection switch 2-7 lights up, and the positioning signal is fed back to the PLC;

[0010] The triplet 3 and the two-position five-way solenoid valve 4 are respectively assembled on the body of the projection welding machine 6; the PLC can send commands to the two-position five-way solenoid valve 4, and the two-position five-way solenoid valve 4 can control the extension and retraction of the cylinder 2-2 in the part ejection device 2 by the movement of the internal piston rod; the pressure reducing valve in the triplet 3 can adjust the magnitude of the cylinder top force in the part ejection device 2.

[0011] Furthermore, the upper electrode detection switch bracket 1-1 is designed with elongated holes in two directions, which can realize the adjustment of the upper electrode detection switch 1-3 in terms of its vertical and horizontal positions.

[0012] Furthermore, by rotating, the exposed length of the upper electrode in the detected bolts 1-2 can be adjusted, thereby adjusting the detection switch distance.

[0013] Furthermore, the connecting plate I2-1 is provided with an elongated hole for adjusting the vertical position of the ejection device 2; the cylinder 2-2 is fixed to the connecting plate I2-1 with two cylindrical positioning pins and four bolts, and the top of the cylinder 2-2 is fixed to the connecting plate II2-3 with two cylindrical positioning pins and four bolts; the connecting plate III2-4 is designed with two elongated holes and is connected to the connecting plate II2-3 with four bolts; the top block 2-5 is provided with two elongated holes and is connected to the connecting plate III2-4 with four bolts, and an avoidance hole 14 is designed at the position where the top block 2-5 coincides with the lower electrode; the ejection device detection bracket 2-6 is provided with elongated holes in two directions for adjusting the vertical and horizontal and front-back positions of the ejection device detection switch 2-7.

[0014] Furthermore, the exposed length of the bolt 2-8 being tested by the ejection device can be adjusted by rotation, thereby adjusting the distance of the detection switch and accurately feeding back the working status of the ejection device to the PLC.

[0015] Furthermore, the triplet 3 and the two-position five-way solenoid valve 4 are respectively bolted to the body of the projection welding machine 6. The triplet 3 is a standard outsourced component, which includes a pressure reducing valve, a filter and a pressure relief valve. The pressure reducing valve is used to adjust the air pressure, the filter is used to filter impurities in the air, and the pressure relief valve is used to open and close the air supply. The components are connected by bolts and gaskets.

[0016] A method for removing a large projection welded component using an auxiliary component removal system includes the following steps:

[0017] A. During the welding process, after the upper electrode detection device 1 detects that the upper electrode 9 is pressed into place, the upper electrode position detection bolt 1-2 reaches the position of the upper electrode position detection switch 1-3, the indicator light of the upper electrode position detection switch 1-3 lights up, and a feedback signal is sent to the projection welding machine 6, and the projection welding machine 6 starts welding the part.

[0018] B. After welding is completed, the projection welding machine 6 sends a signal to the PLC. The PLC sends a command to the welding machine's built-in two-position five-way solenoid valve 7. The welding machine's built-in two-position five-way solenoid valve 7 then controls the welding machine's built-in cylinder 8 to retract through the air circuit, thereby driving the upper electrode 9 to start rising and lifting it back to the original position of the upper electrode 9.

[0019] C. When the upper electrode is in position, the detected bolt 1-2 moves away from the upper electrode position detection switch 1-3, the indicator light on the upper electrode position detection switch 1-3 goes out, and the signal is fed back to the PLC.

[0020] D. The PLC sends a command to the two-position five-way solenoid valve 4. The two-position five-way solenoid valve 4 controls the cylinder 2-2 to extend through the logic air circuit. After the cylinder 2-2 extends, the connecting plate II 2-3 connected to it extends, the connecting plate III 2-4 connected to the connecting plate II 2-3 also extends, and the top block 2-5 connected to the connecting plate III 2-4 also extends.

[0021] E. Once the ejection is complete, the part can be removed from the lower electrode, and the operator can easily remove the part.

[0022] F. When the top block 2-5 is pushed out to the position, the ejection device detection switch 2-7 detects that the ejection device is in position and the detected bolt 2-8 is in position. The indicator light of the ejection device detection switch 2-7 is on, indicating that the ejection device 2 is pushed out to the position. The position signal is fed back to the PLC, and the PLC sends a command to the two-position five-way solenoid valve 4.

[0023] G. The two-position five-way solenoid valve 4 controls the cylinder 2-2 through the air circuit system to drive the top block 2-5 back to the lower origin position, preparing for the next round of ejection and retraction.

[0024] Furthermore, the indicator light is a built-in indicator light of the detection switch, and the indicator light will automatically light up when the detection switch detects a metal object.

[0025] Furthermore, the top block 2-5 is designed according to the shape of the contact surface with the part, and is made of nylon.

[0026] Furthermore, during the welding process, the upper electrode positioning detection switch 1-3 and the part removal device detection switch 2-7 are used to detect the pressing / lifting state of the upper electrode 9 and the ejection / retraction state of the part removal device, and feed the signals back to the PLC of the projection welding machine 6.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] The auxiliary ejection system for large projection welded parts of this invention can eject the workpiece through air circuit control when the projection weld of a large part is completed. The ejection system has a simple structure, is easy to process, and has low manufacturing cost. It reduces labor intensity, eliminates safety hazards and quality defects caused by part deformation, improves production efficiency, shortens the project development cycle, and reduces development costs. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A schematic diagram of the auxiliary part removal system for large projection welds;

[0031] Figure 2 This is a schematic diagram of the upper electrode detection device;

[0032] Figure 3 This is a schematic diagram of the ejection device.

[0033] Figure 4 A flowchart illustrating the working process of the auxiliary part removal system for a large projection welding machine;

[0034] Figure 5 A schematic diagram of the control principle of the auxiliary part removal system for large projection welded parts;

[0035] Figure 6 This is a schematic diagram showing the location of the top block's avoidance hole.

[0036] In the diagram: 1. Upper electrode detection device; 1-1. Upper electrode detection switch bracket; 1-2. Upper electrode positioning detection bolt; 1-3. Upper electrode positioning detection switch; 2. Part removal device; 2-1. Connecting plate I; 2-2. Cylinder; 2-3. Connecting plate II; 2-4. Connecting plate III; 2-5. Top block; 2-6. Part removal device detection bracket; 2-7. Part removal device detection switch; 2-8. Part removal device detection bolt; 3. Triple unit; 4. Two-position five-way solenoid valve; 5. Welding machine built-in triple unit; 6. Projection welding machine; 7. Welding machine built-in two-position five-way solenoid valve; 8. Welding machine built-in cylinder; 9. Upper electrode; 10. Lower electrode; 11. Upper electrode detection bracket elongated hole; 12. Part removal device detection bracket elongated hole; 13. Lower electrode and top block avoidance hole position; 14. Avoidance hole. Detailed Implementation

[0037] The present invention will be further described below with reference to embodiments:

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0039] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this invention, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0040] like Figure 1 As shown, the auxiliary ejection system for large projection welded parts of the present invention includes an upper electrode detection device 1, an ejection device 2, a triplet 3, and a two-position five-way solenoid valve 4, which can smoothly eject the workpiece after the projection weld is completed.

[0041] like Figure 2 As shown, the upper electrode detection device 1 consists of an upper electrode detection switch bracket 1-1, an upper electrode positioning detection bolt 1-2, and an upper electrode positioning detection switch 1-3. The upper electrode detection switch bracket 1-1 is connected to the upper cylinder body fixing plate of the projection welding machine 6. The upper electrode positioning detection switch 1-3 is bolted to the upper electrode detection switch bracket 1-1, thus fixing the upper electrode detection switch 1-3. The upper electrode positioning detection bolt 1-2 is threadedly connected to the connecting plate of the upper electrode arm of the projection welding machine 6. This connecting plate is connected to the cylinder piston rod. When the cylinder piston rod moves up and down, it can drive the upper electrode arm of the projection welding machine 6 and its connecting plate to move up and down accordingly, thus enabling the upper electrode positioning detection bolt 1-2 to move up and down following the cylinder piston rod.

[0042] Specifically, the upper electrode detection switch bracket 1-1 is designed with elongated holes in two directions (elongated holes 11 of the upper electrode detection switch bracket, such as...). Figure 2 As shown in the enlarged view, the up-down and back-forward positions of the upper electrode detection switches 1-3 can be adjusted.

[0043] The upper electrode is positioned to be detected by the bolt 1-2. The exposed length of the bolt 1-2 can be adjusted by rotation. A longer exposed length means it is closer to the detection switch, preventing the detection switch from failing to detect the bolt due to an insufficient exposed length. Therefore, adjusting the exposed length of the bolt allows for adjustment of the detection switch distance, ensuring effective detection and accurately feeding back the working status signal of the upper electrode 9 to the PLC.

[0044] like Figure 3 As shown, the ejection device 2 consists of a connecting plate I 2-1, a cylinder 2-2, a connecting plate II 2-3, a connecting plate III 2-4, a top block 2-5, an ejection device detection bracket 2-6, an ejection device detection switch 2-7, and an ejection device positioning detection bolt 2-8. The connecting plate I 2-1 is bolted to the body of the projection welding machine 6. The cylinder 2-2 is connected to the connecting plate I 2-1 by four bolts and two internally threaded cylindrical pins. The connecting plate II 2-3 is connected to the connecting plate of the cylinder 2-2 by four bolts and two internally threaded cylindrical pins. The connecting plate III 2-4 is connected to the connecting plate II 2-3 by four bolts. The top block 2-5 is connected to the connecting plate III 2-4 by four bolts. The ejection device detection bracket 2-6 is bolted to the connecting plate I 2-1. The ejection device detection switch 2-7 is bolted to the ejection device detection bracket 2-6.

[0045] Specifically, the connecting plate Ⅰ2-1 is designed with an elongated hole, which allows for adjustment of the vertical position of the ejection device 2.

[0046] The cylinder 2-2 is fixed to the connecting plate I2-1 with two cylindrical locating pins and four bolts. The top of the cylinder 2-2 is fixed to the connecting plate II2-3 with two cylindrical locating pins and four bolts to ensure the accuracy and stability of the position of the cylinder 2-2 and the two connecting plates.

[0047] At the position where the top block 2-5 coincides with the lower electrode, that is, at the position 13 where the lower electrode and the top block avoidance hole are located, an avoidance hole 14 is designed, such as... Figure 6 As shown in the enlarged diagram, this allows the top blocks 2-5 to be ejected smoothly without any jamming.

[0048] The connecting plate Ⅲ2-4 is designed with two elongated holes and is connected to the connecting plate Ⅲ2-3 by four bolts, allowing for adjustment of the connecting plate Ⅲ2-4 in the left-right direction. The top block 2-5 is designed with two elongated holes and is connected to the connecting plate Ⅲ2-4 by four bolts, allowing for adjustment of the top block 2-5 in the front-back direction. This enables adjustment of the top block 2-5 in both the left-right and front-back directions.

[0049] The ejection device detection bracket 2-6 is designed with elongated holes in two directions (elongated hole 12 of the ejection device detection bracket, such as...). Figure 3 As shown in the enlarged view, the up-down and back-and-forth positions of the detection switch 2-7 of the part removal device can be adjusted.

[0050] The ejection device positions the inspected bolt 2-8, which is threaded into the threaded hole of the connecting plate II 2-3. By rotating the bolt, the exposed length of the bolt can be adjusted. A longer exposed length means a closer distance to the detection switch, preventing the detection switch from failing to detect the bolt due to an insufficient exposed length. Therefore, adjusting the exposed bolt length allows for adjustment of the detection switch distance, ensuring effective detection and accurately feeding back the ejection device's operating status to the PLC.

[0051] The triplet 3 and the two-position five-way solenoid valve 4 are respectively bolted to the body of the projection welding machine 6. The ejection and retraction of the part ejection device 2 are controlled by the design of the air pipeline connection and logical sequence. The two-position five-way solenoid valve 4 can control the extension and retraction of the cylinder 2-2 in the part ejection device 2 by the movement of the internal piston rod.

[0052] The pressure-reducing valve in the triplet 3 can adjust the output force of the cylinder in the ejection device 2, preventing excessive or insufficient output force that could cause deformation or failure to eject the workpiece. The triplet 3 is a standard purchased component, comprising a pressure-reducing valve, a filter, and a pressure-relieving valve. The pressure-reducing valve adjusts the air pressure, the filter removes impurities from the air, and the pressure-relieving valve opens and closes the air supply. All components are connected by bolts and gaskets.

[0053] During the welding process, after the upper electrode detection device 1 detects that the upper electrode 9 is pressed into place, the upper electrode positioning detection bolt 1-2 reaches the position of the upper electrode positioning detection switch 1-3, the indicator light of the upper electrode positioning detection switch 1-3 illuminates, and a feedback signal is sent to the projection welding machine 6, which then begins welding the workpiece. In this invention, the indicator light is a built-in indicator light of the detection switch; when a metal object is detected on the end face of the detection switch, the indicator light will automatically illuminate. After welding is completed, the projection welding machine 6 sends a feedback signal to the PLC, which then sends a command to the welding machine's built-in two-position five-way solenoid valve 7. This valve 7 then controls the welding machine's built-in cylinder to retract via the air circuit, thereby causing the upper electrode 9 to rise and return to its original position. At this time, the upper electrode positioning detection bolt 1-2 leaves the upper electrode positioning detection switch 1-3, the indicator light of the upper electrode positioning detection switch 1-3 goes out, and the signal is fed back to the PLC. The PLC sends a command to the two-position five-way solenoid valve 4. The two-position five-way solenoid valve 4, through a logic pneumatic circuit, controls the extension of cylinder 2-2. After cylinder 2-2 extends, connecting plate II 2-3, connected to it, extends accordingly. Similarly, connecting plate III 2-4, connected to connecting plate III 2-3, also extends, as does the top block 2-5. Once the part is fully ejected, it can be removed from the lower electrode, allowing the operator to easily remove it. Simultaneously, when the top block 2-5 is fully ejected, the ejection device detection switch 2-7 detects the ejection device's position on the detected bolt 2-8, and the indicator light on the ejection device detection switch 2-7 illuminates, indicating that the ejection device 2 has been fully ejected. This signal is fed back to the PLC, which then sends a command to the two-position five-way solenoid valve 4. The two-position five-way solenoid valve 4, through the pneumatic circuit, controls cylinder 2-2 to retract the top block 2-5 back to its lower origin position, preparing for the next round of ejection and retraction.

[0054] To prevent the top blocks from bumping or scratching parts during movement, the top blocks 2-5 are designed according to the shape of the contact surface with the parts and are made of nylon to ensure smooth removal of the parts. This device solves the problem of difficult removal of large welded parts after welding, reduces the labor intensity of operators, thereby improving production cycle time. At the same time, it eliminates safety hazards and quality defects such as part deformation or scratches caused by improper operation.

[0055] like Figure 4As shown, after the operator positions the workpiece on the lower electrode, they press the start button of the projection welding machine 6. The projection welding machine 6 sends a start signal to the PLC. The PLC sends a command to the welding machine's built-in two-position five-way solenoid valve 7. After receiving the command, the welding machine's built-in two-position five-way solenoid valve 7 extends through the air circuit, thereby driving the upper electrode 9 to move downwards and press the workpiece together. At the same time, the upper electrode positioning detection bolt 1-2 also descends. When the upper electrode positioning detection bolt 1-2 descends to the upper electrode positioning detection switch 1-3 position, the upper electrode positioning detection switch 1-3 indicator light illuminates, indicating that the upper electrode detection device 1 has detected that the upper electrode 9 is pressed into place and sends a feedback signal to the projection welding machine 6. The projection welding machine 6 begins welding, and after welding is completed, it sends a welding end signal back to the PLC. The PLC sends a command to the welding machine's built-in two-position five-way solenoid valve 7. After receiving the command, the welding machine's built-in two-position five-way solenoid valve 7 retracts through the air circuit, thereby driving the upper electrode 9 and the detection bolt 1-2 upwards. When the bolt 1-2 being tested leaves the upper electrode detection switch 1-3, the indicator light on the upper electrode detection switch 1-3 goes out, indicating that the upper electrode 9 is in a non-pressed state, and a feedback signal is sent to the PLC. The PLC sends a command to the two-position five-way solenoid valve 4, which controls the cylinder 2-2 in the part ejection device 2 to lift upwards through the logic pneumatic circuit, thereby driving the top block 2-5 to push the part out of the lower electrode 10. After the part ejection device 2 is in place, the operator can easily remove the part. At the same time, the indicator light on the part ejection device detection switch 2-7 lights up, indicating that the part ejection device is in place, and a signal is fed back to the PLC. The PLC sends a command to the two-position five-way solenoid valve 4, which controls the cylinder 2-2 through the pneumatic circuit, causing the cylinder 2-2 to retract, thereby driving the part ejection device 2 to descend back to the lower origin position. At this time, the projection welding machine 6 returns to the initial position of the program, and the next round of welding can be performed.

[0056] During the welding process, the upper electrode positioning detection switch 1-3 and the part removal device detection switch 2-7 are responsible for detecting the pressing / lifting status of the upper electrode 9 and the ejection / retraction status of the part removal device. After feeding back the signals to the PLC of the projection welding machine 6, the PLC issues commands to the two-position five-way solenoid valve 7 and the two-position five-way solenoid valve 4 of the part removal device 2. The two-position five-way solenoid valve 4 then controls the extension and retraction of the welding machine's cylinder 8 and the part removal device cylinder through the logic pneumatic circuit, thereby driving the movement of the upper electrode 9 and the part removal device 2. That is, when the upper electrode 10 is pressed down, the part removal device 2 must be in the lower origin position; and when the part removal device 2 is ejected, the upper electrode 9 must be lifted back to the raised origin position. This achieves interlocking of the downward pressing action of the upper electrode 9 and the upward ejection action of the part removal device 2, preventing the part removal device 2 from being ejected when the upper electrode 9 is pressed down, or the part removal device 2 being ejected when the upper electrode 9 is pressed down, and the downward pressing action of the upper electrode 9 from the upper electrode 9.

[0057] The present invention provides a system and method for removing large projection welded parts 6, which enables the smooth removal of the part from the lower electrode after welding of large projection welded parts, reducing the labor intensity of operators and improving work efficiency. At the same time, it also eliminates the hidden dangers of part deformation or even personnel scratches caused by improper operation, thereby improving work efficiency and product quality stability.

[0058] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. An auxiliary ejection system for large projection welded parts, characterized in that: It includes an upper electrode detection device (1), a part removal device (2), a triplet (3) and a two-position five-way solenoid valve (4), which can smoothly eject the workpiece after the projection welding is completed; The upper electrode detection device (1) includes an upper electrode detection switch bracket (1-1) connected to the upper part of the projection welding machine (6), on which an upper electrode position detection switch (1-3) is connected. It also includes an upper electrode position detection bolt (1-2) connected to the connecting plate of the upper electrode arm of the projection welding machine (6). The connecting plate is connected to the cylinder piston rod, so that the upper electrode position detection bolt (1-2) can move up and down with the cylinder piston rod. After the upper electrode detection device (1) detects that the upper electrode (9) is pressed into place, the upper electrode position detection bolt (1-2) reaches the position of the upper electrode position detection switch (1-3), the indicator light of the upper electrode position detection switch (1-3) lights up, and the feedback signal is sent to the projection welding machine (6). The part removal device (2) includes a connecting plate I (2-1) connected to the body of the projection welding machine (6), a cylinder (2-2) connected to the connecting plate I (2-1), a connecting plate II (2-3) connected to the connecting structure of the cylinder (2-2), a connecting plate III (2-4) connected to the connecting plate II (2-3), and a top block (2-5) connected to the connecting plate III. (2-4) also includes a part removal device detection bracket (2-6), a part removal device detection switch (2-7) connected to the part removal device detection bracket (2-6), and a part removal device positioning detection bolt (2-8) connected to the connecting plate II (2-3); when the cylinder (2-2) extends, it can sequentially drive the connecting plate II (2-3), the connecting plate III (2-4), and the top block (2-5) to extend as well; after the top block (2-5) is pushed out to the position, the part removal device detection switch (2-7) detects the part removal device positioning detection bolt (2-8), the indicator light of the part removal device detection switch (2-7) lights up, and the positioning signal is fed back to the PLC; The triplet (3) and the two-position five-way solenoid valve (4) are respectively mounted on the body of the projection welding machine (6); the PLC can send instructions to the two-position five-way solenoid valve (4), and the two-position five-way solenoid valve (4) can control the extension and retraction of the cylinder (2-2) in the part removal device (2) by the movement of the internal piston rod; the pressure reducing valve in the triplet (3) can adjust the magnitude of the cylinder top force in the part removal device (2); The upper electrode detection switch bracket (1-1) is designed with elongated holes in two directions, which can adjust the up-down and back-forward positions of the upper electrode detection switch (1-3); by rotating, the exposed length of the upper electrode detection bolt (1-2) can be adjusted, thereby adjusting the detection switch distance; the connecting plate I (2-1) is provided with elongated holes for adjusting the up-down position of the ejection device (2); the cylinder (2-2) is fixed to the connecting plate I (2-1) with two cylindrical positioning pins and four bolts, and the top of the cylinder (2-2) is fixed to the connecting plate II (2-3) with two cylindrical positioning pins and four bolts; the connecting plate III (2-4) is designed with two elongated holes and is connected to the connecting plate II (2-3) with four bolts; the top block (2-5) is provided with two elongated holes and is connected to the connecting plate with four bolts. On Ⅲ (2-4), and at the position where the top block (2-5) coincides with the lower electrode, there is a hole (14); the ejection device detection bracket (2-6) is provided with two elongated holes in two directions for adjusting the up and down and front and back positions of the ejection device detection switch (2-7); the ejection device in place detection bolt (2-8) can adjust the exposed length of the detection bolt by rotation, thereby adjusting the detection switch distance and accurately feeding back the working status of the ejection device to the PLC; the triple unit (3) and the two-position five-way solenoid valve (4) are respectively bolted to the body of the projection welding machine (6). The triple unit (3) is a standard purchased part, which includes a pressure reducing valve, a filter and a pressure relief valve. The pressure reducing valve is used to adjust the air pressure, the filter is used to filter impurities in the air, and the pressure relief valve is used to open and close the air supply. The components are connected by bolts and gaskets.

2. The method for removing a large projection welded part using an auxiliary removal system according to claim 1, characterized in that, Includes the following steps: A. During the welding process, after the upper electrode detection device (1) detects that the upper electrode (9) is pressed into place, the upper electrode position detection bolt (1-2) reaches the position of the upper electrode position detection switch (1-3), the indicator light of the upper electrode position detection switch (1-3) lights up, and the feedback signal is sent to the projection welding machine (6), and the projection welding machine (6) starts welding the part. B. After welding is completed, the projection welding machine (6) sends a feedback signal to the PLC. The PLC sends an instruction to the welding machine's built-in two-position five-way solenoid valve (7). The welding machine's built-in two-position five-way solenoid valve (7) then controls the welding machine's built-in cylinder (8) to retract through the air circuit, thereby driving the upper electrode (9) to start rising and lift up back to the original position of the upper electrode (9). C. When the upper electrode is in position, the detected bolt (1-2) moves away from the upper electrode position detection switch (1-3), the indicator light of the upper electrode position detection switch (1-3) goes out, and the signal is fed back to the PLC; D. The PLC sends a command to the two-position five-way solenoid valve (4). The two-position five-way solenoid valve (4) extends through the logic air circuit. The air circuit system controls the cylinder (2-2) to extend. After the cylinder (2-2) extends, the connecting plate II (2-3) connected to it extends, the connecting plate III (2-4) connected to the connecting plate II (2-3) also extends, and the top block (2-5) connected to the connecting plate III (2-4) also extends. E. Once the ejection is complete, the part can be removed from the lower electrode, and the operator can easily remove the part. F. When the top block (2-5) is pushed out to the position, the ejection device detection switch (2-7) detects the ejection device in position and the detected bolt (2-8). The indicator light of the ejection device detection switch (2-7) lights up, indicating that the ejection device (2) is pushed out to the position. The position signal is fed back to the PLC, and the PLC sends a command to the two-position five-way solenoid valve (4). G. The two-position five-way solenoid valve (4) controls the cylinder (2-2) through the air circuit system to drive the top block (2-5) back to the lower origin position, in preparation for the next round of ejection and retraction.

3. The part removal method of the auxiliary part removal system for large projection welds according to claim 2, characterized in that: The indicator light is a built-in indicator light of the detection switch. When the detection switch detects a metal object, the indicator light will automatically light up.

4. The part removal method of the auxiliary part removal system for large projection welds according to claim 3, characterized in that: The top block (2-5) is designed according to the shape of the contact surface with the part, and is made of nylon.

5. The part removal method of the auxiliary part removal system for large projection welds according to claim 4, characterized in that: During the welding process, the upper electrode positioning detection switch (1-3) and the part removal device detection switch (2-7) are used to detect the pressing / lifting state of the upper electrode (9) and the ejection / retraction state of the part removal device, and feed the signals back to the PLC of the projection welding machine (6).

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