Special single-side spot welding machine for inner ring of sheet steel coil

Abstract

The utility model relates to the field of spot welding machines, and discloses a sheet steel coil inner ring single-side spot welding special machine which comprises a supporting frame, an inserting head is fixedly connected to one side of the outer wall of the supporting frame, supporting mechanisms in an annular array are arranged in the inserting head, and a welding air cylinder is slidably connected to the interior of the supporting frame. A welding air cylinder is arranged in the inserting head, a reverse thrust air cylinder is fixedly connected to the output end of the welding air cylinder, a welding electrode is fixedly connected to the output end of the reverse thrust air cylinder, a distance measuring assembly is arranged in the inserting head and comprises a laser distance measuring instrument, and one side of the outer wall of the laser distance measuring instrument is fixedly connected to the interior of the inserting head. According to the utility model, the reverse thrust cylinder drives the surrounding supporting mechanisms to annularly extend out towards the outer side, so that the supporting mechanisms can be supported in the steel coil, and finally, spot welding is completed by the welding electrode, thereby solving the problem that the inner core of the sheet steel coil droops and is inconvenient to weld, and improving the welding convenience of the inner ring of the steel coil.

Description

Technical Field

[0001] The utility model relates to the field of spot welding machines, in particular to a special machine for single-side spot welding of the inner ring of a thin plate steel coil. Background Art

[0002] In the field of steel rolling production, steel coils are widely circulated in steel mills as a semi-finished strip steel product and are the raw materials for the next process; or as finished strip steel products, they enter the steel market. Regardless of whether they are semi-finished products or finished products, when the inner ring of the steel coil has sagging head or in order to prevent the head from sagging, the inner ring of the steel coil needs to be spot welded to improve the adaptability of the steel coil in the next operation process.

[0003] After searching, a spot welding machine is disclosed in the announcement number: CN216912465U, including a welding station, a welding gun is arranged above the welding station, a lifting mechanism is arranged on the welding gun, and a positioning mechanism is arranged below the welding station, the positioning mechanism includes a positioning rod and clamping members respectively arranged on both sides of the positioning rod, and the positioning rod is a cylindrical structure, and a disc is arranged at the rear end of the positioning rod, and the disc is rotatably clamped between the clamping members on both sides together with the positioning rod; an annular sleeve is arranged on the positioning rod, and convex rings are respectively arranged at both ends of the annular sleeve; a motor is also arranged at the rear end of the positioning rod, and the motor is driven and connected to the positioning rod to drive the annular sleeve to rotate around the axis of the positioning rod. When the spot welding machine in this application is used for spot welding the inner ring of the steel coil, it needs to withstand a high-temperature radiation working environment, which is not conducive to the health of the operator, and the efficiency of manual spot welding is low, which is not conducive to large-scale spot welding of the inner ring of the steel coil. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a special machine for single-sided spot welding of the inner ring of thin steel coils, aiming to improve the problem that the spot welding machine needs to withstand high-temperature radiation working environment when spot welding the inner ring of steel coils, which is not conducive to the health of operators, and the manual spot welding is inefficient and not conducive to large-scale spot welding operations of the inner ring of steel coils.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a special machine for single-sided spot welding of the inner ring of a thin steel coil, comprising a support frame, an insertion head is fixedly connected to one side of the outer wall of the support frame, a ring-shaped array support mechanism is arranged inside the insertion head, a welding cylinder is slidably connected inside the support frame, a reverse thrust cylinder is fixedly connected to the output end of the welding cylinder, a welding electrode is fixedly connected to the output end of the reverse thrust cylinder, and a distance measuring component is arranged inside the insertion head.

[0006] Furthermore, the distance measuring component includes a laser distance meter, and one side of the outer wall of the laser distance meter is fixedly connected to the inside of the insertion head.

[0007] Furthermore, a robot flange connecting plate is fixedly connected to one side of the outer wall of the support frame.

[0008] Furthermore, an air blowing circuit board is fixedly connected to one side of the interior of the support frame, and an output end of the air blowing circuit board is fixedly connected to an air blowing column which is symmetrical up and down.

[0009] Furthermore, a terminal box is fixedly connected to one side of the outer wall of the support frame.

[0010] Furthermore, a solenoid valve is fixedly connected to one side of the interior of the support frame.

[0011] The utility model has the following beneficial effects:

[0012] 1. In the utility model, the insertion head is first positioned by a laser rangefinder to insert the steel coil, and then the surrounding support mechanism is driven to extend outward in a ring shape by a reverse thrust cylinder, so that the support mechanism will be supported inside the steel coil, and finally the spot welding is completed by the welding electrode, which solves the problem that the inner core of the thin steel coil droops and is inconvenient to weld inside, and improves the convenience of welding the inner circle of the steel coil.

[0013] 2. In the utility model, the robot flange connecting plate is firstly used to facilitate the installation of the device and the robot, and then the air blowing column is driven by the air blowing gas circuit plate to spray out air for cooling, thereby solving the problem of equipment damage caused by excessively high welding temperature and improving the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main structure of a thin plate steel coil inner ring single-side spot welding machine proposed by the utility model;

[0015] Figure 2 This is a schematic diagram of the operation of a single-side spot welding machine for the inner ring of a thin steel coil proposed by the utility model;

[0016] Figure 3 The utility model is a schematic diagram of the insertion column section of a special machine for single-sided spot welding of the inner ring of a thin steel coil proposed by the utility model.

[0017] Legend:

[0018] 1. Support frame; 2. Robot flange connecting plate; 3. Air blowing plate; 4. Air blowing column; 5. Insertion head; 6. Support mechanism; 7. Terminal box; 8. Solenoid valve; 9. Thrust cylinder; 10. Laser rangefinder; 11. Welding electrode; 12. Welding cylinder. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Reference Figure 1-3 The utility model provides an embodiment: a single-sided spot welding machine for the inner ring of a thin steel coil, comprising a support frame 1, an insertion head 5 is fixedly connected to one side of the outer wall of the support frame 1, a ring array support mechanism 6 is arranged inside the insertion head 5, a welding cylinder 12 is slidably connected inside the support frame 1, a reverse thrust cylinder 9 is fixedly connected to the output end of the welding cylinder 12, a welding electrode 11 is fixedly connected to the output end of the reverse thrust cylinder 9, a distance measuring component is arranged inside the insertion head 5, and the distance measuring component includes a laser rangefinder 10, and one side of the outer wall of the laser rangefinder 10 is fixedly connected to the inside of the insertion head 5;

[0021] Specifically, when this special machine is working, the whole device is driven by a six-axis robot, which goes deep into the interior of the steel coil for welding. The front end of the insertion head 5 is designed to be inclined. During the welding process, the insertion head 5 is accurately positioned by the laser rangefinder 10 and pushed forward along the axis of the steel coil. During the advancement process, the insertion head 5 can lift the sagging first layer of inner plate to reach the predetermined position. This process is controlled by the programmable logic controller PLC to ensure the accuracy and stability of welding. When the insertion head 5 is pushed into place, the PLC controls the support mechanism 6 to move in four directions. The inner roll is supported and the first layer of sagging steel plate is tightly pressed against the steel coil. At this time, the welding cylinder 12 is started to push the reverse thrust cylinder 9 to extend. The two welding electrodes 11 and the reverse thrust cylinder 9 respectively support the two sides of the inner side of the steel coil along the diameter to ensure the stability of welding. After the welding cylinder 12 and the reverse thrust cylinder 9 are in place, the transformer is energized to weld the first layer of steel plate to the inner wall of the steel coil. This operation is repeated twice to form four welding points, so that the steel plate and the steel coil are firmly connected together. After the welding is completed, the welding cylinder 12 and the reverse thrust cylinder 9 return to their original positions and the supporting mechanism 6 is closed. Subsequently, the entire special machine continued to advance along the axis driven by the robot and started the next round of welding. After completing all welding tasks, the special machine withdrew the steel coil along the axis of the steel coil driven by the robot. At this time, the first layer of the steel coil has been completely welded to the inner wall of the steel coil, and has high strength and stability. This means that the steel coil welding process has been successfully completed and subsequent transportation and processing can be carried out. In traditional resistance welding, electrodes are set at both ends of the plate, and the positive and negative electrodes are pressed and powered on for welding. However, this method is only suitable for thin plate parts and cannot weld steel coils made of multiple layers of steel plates. Therefore, this special machine is designed with a single-sided double-spot welding mechanism. The difference between single-sided double-spot welding and traditional resistance welding is that the two electrodes are set on the same side of the welding plate, and the plate is used as a conductor to allow the welding current to be conducted between the two electrodes. The welding current is gathered at the two welding points to weld the plate firmly.

[0022] Reference Figure 1-3 A robot flange connecting plate 2 is fixedly connected to one side of the outer wall of the support frame 1, a blowing air circuit board 3 is fixedly connected to one side of the inner wall of the support frame 1, and a blowing column 4 symmetrical up and down is fixedly connected to the output end of the blowing air circuit board 3;

[0023] Specifically, the robot flange connecting plate 2 can be used to connect and fix the special machine to the six-axis robot for easy control. The steel coil is still in a high temperature state during packaging and welding, so the special machine must also be able to resist the heat radiation caused by the high temperature of the steel coil. Some insulating parts and rubber seals will be affected by the high temperature and accelerate aging and failure. Therefore, in addition to the water cooling mechanism of the welding electrode 11, the special machine is also designed with an air cooling module for the whole machine. Compressed air is blown out from the open blowing column 4 of the blowing air circuit plate 3 to take away the heat. At the same time, high-temperature resistant protective armor is installed on the outside of the whole machine.

[0024] Reference Figure 1-3, so a terminal box 7 is fixedly connected to one side of the outer wall of the support frame 1, and a solenoid valve 8 is fixedly connected to one side of the inner wall of the support frame 1;

[0025] Specifically, the terminal box 7 plays an important role in the electrical system of the special machine, providing a solution for effectively managing and connecting cables and wires, while also contributing to the safety, maintainability and manageability of the system. The solenoid valve 8 can well control the extension and retraction of the cylinder.

[0026] Working principle: When working, the whole machine is driven by a six-axis robot and goes deep into the steel coil for welding. The front end of the insertion head 5 is designed to be inclined. After being positioned by the laser rangefinder 10, it can lift up the sagging first layer of inner plate when it is pushed forward along the axis of the steel coil. After it is pushed into place, the PLC controls the support mechanism 6 to support the inner coil in four directions, and press the sagging first layer of steel plate and the steel coil tightly. At this time, the welding cylinder 12 is started, and the reverse thrust cylinder 9 is extended at the same time. The two welding electrodes 11 and the reverse thrust cylinder 9 are moved along the straight line. The two diameters support the two sides of the inner side of the steel coil respectively. After they are in place, the transformer is energized to weld the first layer of steel plate to the inner wall of the steel coil to form two welding points. After welding, the welding cylinder 12 and the reverse thrust cylinder 9 retreat, the support mechanism 6 is closed, and then the entire special machine continues to advance along the axis driven by the robot, repeating the previous round of welding action to eventually form 4 welding points. After completion, the special machine withdraws from the steel coil along the axis of the steel coil driven by the robot. At this time, the first layer of the steel coil has been completely welded to the inner wall of the steel coil and can be transported.

[0027] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A machine for single-side spot welding of the inner ring of a thin steel coil, comprising a support frame (1), characterized in that: An insertion head (5) is fixedly connected to one side of the outer wall of the support frame (1), a ring array support mechanism (6) is arranged inside the insertion head (5), a welding cylinder (12) is slidably connected inside the support frame (1), a reverse thrust cylinder (9) is fixedly connected to the output end of the welding cylinder (12), a welding electrode (11) is fixedly connected to the output end of the reverse thrust cylinder (9), and a distance measuring component is arranged inside the insertion head (5).

2. A thin steel coil inner ring single-side spot welding machine according to claim 1, characterized in that: The distance measuring component comprises a laser distance meter (10), and one side of the outer wall of the laser distance meter (10) is fixedly connected to the inside of the insertion head (5).

3. The single-side spot welding machine for inner ring of thin steel coil according to claim 1, characterized in that: A robot flange connection plate (2) is fixedly connected to one side of the outer wall of the support frame (1).

4. The single-side spot welding machine for inner ring of thin steel coil according to claim 1, characterized in that: An air blowing circuit board (3) is fixedly connected to one side of the interior of the support frame (1), and an air blowing column (4) which is symmetrical up and down is fixedly connected to the output end of the air blowing circuit board (3).

5. The single-side spot welding machine for inner ring of thin steel coil according to claim 1, characterized in that: Therefore, a terminal box (7) is fixedly connected to one side of the outer wall of the support frame (1).

6. The single-side spot welding machine for inner ring of thin steel coil according to claim 1, characterized in that: A solenoid valve (8) is fixedly connected to one side of the interior of the support frame (1).

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