Thin-wall cylinder seam welding equipment

Abstract

An automatic conveying device is arranged on the front portion of the thin-wall cylinder seam welding equipment, and an automatic welding machine is arranged on the rear portion of the thin-wall cylinder seam welding equipment. The automatic conveying device is provided with an automatic feeding and discharging mechanism and a welding detection device. A welding station is arranged at the intersection of the automatic conveying device and the automatic welding machine; welding wheel devices are arranged on the two sides of the welding station respectively, and the automatic welding machine is provided with a welding pressurizing device connected with the welding wheel devices, a welding rotation driving device and a welding wheel correcting device matched with welding wheels. The two welding wheel devices are located on the two sides of the welding station. The welding wheel device is provided with a welding wheel capable of freely rotating; the welding wheel correcting device comprises a correcting turning tool, a turning tool rest and a correcting servo motor. The correction servo motor is a torque feedback motor, and the pressurization servo motor and the correction servo motor are connected into the same control system. According to the utility model, through fewer detection elements, the automatic welding and correction operation of equipment can be realized, and the requirement of efficient seam welding operation can be met.

Description

Technical Field

[0001] The utility model relates to a device which can automatically perform seam welding on a thin-walled cylinder and belongs to the field of welding equipment. Background Art

[0002] For thin-walled cylinders such as shock absorbers, in order to achieve internal sealing, it is generally necessary to weld the cylinder and the end cover components, and the entire circle seam welding is required, and the welding quality requirements are very high.

[0003] The shock absorber seam welding machine disclosed in Chinese Patent Publication No. CN103286490A discloses a special production equipment, but its degree of automation is low.

[0004] Chinese patent publication number CN107877050A discloses a seam welding machine for automatically welding the base of an automobile shock absorber oil reservoir. The machine proposes an automated welding machine that can effectively automate welding operations. However, the machine uses a large number of sensors, resulting in a complex control system. Furthermore, the machine generates a large magnetic field when operating, which affects many sensors and may cause control failure, impacting normal production.

[0005] In view of the above situation, it is necessary to further study the seam welding equipment for thin-walled cylindrical products. Utility Model Content

[0006] The purpose of the utility model is to provide a thin-walled cylinder seam welding device, which improves the structure of the automatic welding machine, utilizes a welding wheel device to clamp and realize seam welding, and drives the welding wheel to rotate and feed by a welding pressure device and a welding rotation drive device; at the same time, a welding wheel correction device is provided to perform real-time or interval correction on the welding wheel, and utilizes a correction servo motor to perform parameter feedback, thereby correcting the welding wheel diameter parameter to ensure that the welding wheel can reliably contact the workpiece to be welded, thereby realizing reliable seam welding operation.

[0007] In order to achieve the above-mentioned purpose of the utility model, the utility model provides a thin-walled cylinder seam welding device, which is provided with an automatic feeding device at the front and an automatic welding machine at the rear;

[0008] The automatic feeding device is equipped with automatic loading and unloading mechanism and welding detection device;

[0009] The intersection of the automatic feeding device and the automatic welding machine is the welding station;

[0010] There are welding wheel devices on both sides of the welding station. The automatic welding machine is equipped with a welding pressure device connected to the welding wheel device, a welding rotation drive device, and a welding wheel correction device matched with the welding wheel.

[0011] There are two welding wheel devices, located on both sides of the welding station; the welding wheel device is equipped with freely rotatable welding wheels, and the welding wheels on both sides are symmetrically arranged relative to the welding station;

[0012] A welding pressure device is provided on the rear side of the welding wheel device. The welding pressure device is a horizontal servo drive device equipped with a pressure servo motor.

[0013] A welding rotation drive device is provided above the welding wheel device. The welding rotation drive device is provided with an actively rotating rotation drive wheel. The rotation drive wheel is in contact with the outer surface of the welding wheel, and the rotation drive wheel drives the welding wheel to rotate.

[0014] A welding wheel correction device is provided at the lower rear portion of the welding wheel device. The welding wheel correction device includes a correction turning tool, a turning tool holder, and a correction servo motor. The output shaft of the correction servo motor is connected to the turning tool holder. The turning tool holder is a bracket with a horizontal guide mechanism, and a correction turning tool is installed on the inner end thereof. The blade of the correction turning tool matches the surface of the welding wheel.

[0015] The correction servo motor is a torque feedback motor, and the pressurizing servo motor and the correction servo motor are connected to the same control system.

[0016] As a further improvement of the present invention, the welding wheel device includes a welding wheel box, and a welding wheel is rotatably mounted on the bottom of the welding wheel box;

[0017] A rotating conductive device is provided in the welding wheel box; the welding wheel is connected to one pole of the welding power supply of the automatic welding machine through the welding wheel box;

[0018] The welding wheel on one side is connected to the positive pole of the welding power supply; the welding wheel on the other side is connected to the negative pole of the welding power supply.

[0019] Furthermore, a water cooling device is provided in the welding wheel box; a water cooling joint is provided on the outside of the welding wheel box; and the water cooling device is connected to an external cooling water source through the water cooling joint.

[0020] Furthermore, the welding pressure device includes a pressure servo motor and a horizontal conveying device;

[0021] The end of the horizontal conveying device is connected to the welding wheel box.

[0022] As a further improvement of the present invention, the welding rotation drive devices on both sides are driven by the same rotation drive motor;

[0023] It is equipped with 1 rotary drive motor and 2 rotary drive boxes; the rotary drive motor and the 2 rotary drive boxes are synchronously connected;

[0024] Two rotary drive boxes are located above the welding wheel devices on both sides;

[0025] The bottom output shaft of the rotary drive box is connected to the rotary drive wheel through a flexible coupling;

[0026] The rotating driving wheel contacts or separates from the welding wheel through the swing mechanism;

[0027] The swing mechanism is driven by a swing drive.

[0028] Furthermore, the rotary driving wheel has a groove adapted to the surface of the welding wheel.

[0029] When the thin-walled cylinder seam welding equipment of the present invention is working, the welding wheel devices on both sides are driven by the welding pressure device to move inward relative to each other, that is, move toward the welding station, and at the same time clamped on the outside of the thin-walled cylinder to be welded. The welding power supply is working, so that the welded parts generate heat and the materials are melted together; the welding rotation drive device drives the welding wheels to rotate synchronously, and the rotation of the welding wheels drives the cylinder to rotate accordingly. The welding wheels apply pressure while rotating, so that a good welding surface is obtained at the welding part of the cylinder.

[0030] In the present invention, a welding wheel correction device is used to obtain the welding wheel diameter parameter while correcting the welding wheel; the correction servo motor drives the correction turning tool to contact the welding wheel, thereby turning the surface of the welding wheel to achieve correction; the correction servo motor drives the correction turning tool forward, and when it initially contacts the welding wheel, the correction turning tool first removes the protrusions on the surface of the welding wheel. At this time, the driving torque increases, but is uneven. The correction servo motor feeds slowly, and the correction turning tool slowly turns the surface of the welding wheel; when the surface of the welding wheel is completely corrected and evenly, the driving torque of the correction servo motor is further increased and evenly, thereby judging that the welding wheel has been trimmed in place, the correction servo motor stops feeding, and the feed distance of the correction turning tool 61 driven by the correction servo motor is synchronously recorded at this time, so that the current diameter parameter of the welding wheel can be calculated and fed back to the welding pressure device to control the feed amount of the welding wheel during the welding process.

[0031] The thin-walled cylinder seam welding equipment of the present invention can realize the automatic welding and correction operations of the equipment through fewer detection components, is not easy to be damaged, is not easy to make mistakes, has a high degree of automation, and can meet the needs of efficient seam welding operations.

[0032] When the welding product is adjusted, welding can be restored through simple parameter and tooling adjustments, and it has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The overall structure of the thin-walled cylinder seam welding equipment of this utility model is shown as follows Figure 1 ;

[0034] Figure 2 The overall structure of the thin-walled cylinder seam welding equipment of this utility model is shown as follows Figure 2 ;

[0035] Figure 3The overall structure of the thin-walled cylinder seam welding equipment of this utility model is shown as follows Figure 3 ;

[0036] Figure 4 This is a schematic diagram of the welding wheel drive structure;

[0037] Figure 5 Schematic diagram of the welding wheel correction mechanism. DETAILED DESCRIPTION

[0038] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings.

[0039] like Figure 1 、 Figure 2 、 Figure 3 , which is a schematic diagram of the overall structure of the thin-walled cylinder seam welding equipment of the present invention, an automatic feeding device 1 is provided at the front, and an automatic welding machine 2 is provided at the rear.

[0040] The automatic feeding device 1 is preferably a rotary feeding device, which can load and unload the thin-walled cylinder to be welded in conjunction with the automatic loading and unloading mechanism; the thin-walled cylinder is pre-assembled with the parts to be welded and placed in a vertical state on the positioning tooling of the automatic feeding device 1, rotated through the inspection station, and fed to the automatic welding machine 2 after the position is confirmed to be correct after inspection.

[0041] The middle of the automatic welding machine 2 is the welding station, where the parts to be welded are repositioned and fixed before starting welding.

[0042] The automatic welding machine 2 includes welding wheel devices 3 on both sides, and a matching welding pressure device 4, a welding rotation drive device 5, and a welding wheel correction device 6;

[0043] There are two welding wheel devices 3, which are located on both sides of the welding station. Driven by the welding pressure device 4, they can move inward synchronously and clamped on both sides of the thin-walled cylinder to be welded; the electrodes connected to the welding wheel devices 3 on both sides are different, and they are in contact with the two sides of the thin-walled cylinder to be welded at the welding station and are turned on, thereby forming a welding current at the thin-walled cylinder to be welded, and further under the action of pressure, the welding of the parts to be welded is completed; during the welding process, the welding rotation drive device 5 is started, driving the welding wheels of the welding wheel devices 3 on both sides to rotate, and then driving the thin-walled cylinder to be welded to rotate accordingly, thereby achieving complete welding of the entire circumference of the thin-walled cylinder to be welded.

[0044] After welding is completed, the welding wheel device 3 of the automatic welding machine 2 is reset backward; the automatic feeding device 1 is started, and the welded thin-walled cylindrical part is taken away from the welding station, and the next thin-walled cylinder to be welded is transferred in and waits for welding to continue; the entire process realizes fully automated welding operation.

[0045] After welding several sets, the welding wheel of the welding wheel device 3 contacts the welding part, which will generate high temperature and high pressure, which can easily cause damage to the welding wheel. Therefore, it is necessary to start the welding wheel correction device 6 in time after welding is completed to correct the surface of the welding wheel so that a smooth welding working surface can be obtained again, which is conducive to contact with the part to be welded and timely welding operation.

[0046] Further Figure 4 、 Figure 5 As shown, the welding wheel device 3 includes a welding wheel 31, which is rotatably mounted below the welding wheel box 32. The welding wheel box 32 is provided with a rotating conductive device, which can reliably transmit the high voltage and high current generated by the transformer of the automatic welding machine 2 to the rotating welding wheel 31; the welding wheel box 32 is provided with a water cooling device, which is connected to an external cooling water source through a water cooling joint 33, and can accelerate the cooling of the welding wheel box 32 and the welding wheel 31.

[0047] Each welding wheel assembly 3 is followed by a welding pressurizing device 4, which includes a pressurizing servo motor 41 and a horizontal conveying device 42. The end of the horizontal conveying device 42 is connected to the welding wheel box 32. The pressurizing servo motor 41 drives the horizontal conveying device 42, which in turn drives the welding wheel box 32 and the welding wheels 31 to move horizontally.

[0048] The welding rotary drive device 5 is driven by a single rotary drive motor 51. It is equipped with two rotary drive boxes 52, one located above the welding wheel device 3 on either side. The two rotary drive boxes 52 are connected together by a coupling and operate synchronously. The bottom output shaft of the rotary drive box 52 is connected to a rotary drive wheel 54 via a flexible coupling 53. The rotary drive wheel 54 contacts or separates from the welding wheel 31 via a swing mechanism 55. The swing mechanism 55 is driven by a swing drive 56, so that the rotary drive wheel 54 always contacts and presses against the surface of the welding wheel 31. Preferably, the rotary drive wheel 54 has a groove that matches the surface of the welding wheel 31. When the rotary drive motor 51 operates, it drives the two rotary drive boxes 52 to operate synchronously, causing the flexible coupling 53 and the rotary drive wheel 54 to rotate. The friction between the rotary drive wheel 54 and the welding wheel 31 then causes the welding wheel 31 to rotate.

[0049] A welding wheel correction device 6 is also provided behind the welding wheel device 3 on each side; the welding wheel correction device 6 includes a correction turning tool 61, a turning tool holder 62, and a correction servo motor 63; the output shaft of the correction servo motor 63 is connected to the turning tool holder 62, and the turning tool holder 62 is a bracket with a horizontal guide mechanism, and the correction turning tool 61 is installed on the inner end thereof; the blade of the correction turning tool 61 matches the surface of the welding wheel 31, and the surface of the welding wheel 31 is trimmed to adapt to the part to be welded; during the correction process, the welding wheel 31 keeps rotating.

[0050] When the thin-walled cylinder seam welding equipment of the present invention is working, the welding wheel devices 3 on both sides are clamped on the outside of the thin-walled cylinder to be welded under the drive of the welding pressure device 4 and the welding rotation drive device 5. The welding power supply is working, so that the parts to be welded generate heat, and the materials are melted together. The welding wheel 31 rotates and applies pressure, thereby obtaining a good welding surface.

[0051] The welding station is located in the middle, and the distance between the pressurizing servo motor 41 and the welding station is fixed; the output of the pressurizing servo motor 41 needs to be determined according to the outer diameter of the thin-walled cylinder to be welded, especially the diameter of the welding wheel 31, so as to ensure that the welding wheel 31 can always be pressed against the outer surface of the thin-walled cylinder to be welded, that is, it will not be out of contact, resulting in welding failure, nor will it be too much contact, causing the cylinder to be compressed and deformed.

[0052] The outer diameter of the thin-walled cylinder to be welded can be measured and determined in advance and input into the automatic welding machine 2 as a parameter.

[0053] During use, the outer surface of the welding wheel 31 requires frequent surface modification. Therefore, after modification, the outer diameter of the welding wheel 31 must be accurately input into the automatic welding machine 2 to ensure reliable output from the pressurizing servo motor 41 of the welding pressurizing device 4. Conventional methods employ a measuring device installed near the welding wheel 31 to measure its diameter and thereby obtain its outer diameter. However, the measuring device, which is in contact with the welding wheel 31, is susceptible to wear and damage, resulting in inaccurate measurement data. Furthermore, the measuring device is typically a precision electronic device, and when placed close to the welding wheel 31, it is susceptible to interference from the strong magnetic field during welding, potentially damaging components.

[0054] In the present invention, the welding wheel correction device 6 is used to obtain the diameter parameters of the welding wheel 31 while correcting the welding wheel 31; specifically, the correction servo motor 63 is a torque feedback motor, and the correction servo motor 63 drives the correction turning tool 61 to contact the welding wheel 31, thereby performing turning processing on the surface of the welding wheel 31 to achieve correction. After welding, the welding wheel 31 may produce depressions and protrusions on its surface. Before the correction servo motor 63 drives the correction turning tool 61 to contact the welding wheel 31, the driving torque is low, and torque detection indicates that no contact has occurred. The correction servo motor 63 drives the correction turning tool 61 further forward. When it makes initial contact with the welding wheel 31, the correction turning tool 61 first removes the protrusions on the surface of the welding wheel 31. At this point, the driving torque increases, but unevenly. The correction servo motor 63 slowly advances, and the correction turning tool 61 slowly cuts the surface of the welding wheel 31. When the surface of the welding wheel 31 is completely corrected and evenly corrected, the driving torque of the correction servo motor 63 further increases and becomes uniform, indicating that the welding wheel 31 has been trimmed properly. The correction servo motor 63 stops advancing and simultaneously records the feed distance of the correction turning tool 61 driven by the correction servo motor 63. This allows the current diameter parameter of the welding wheel 31 to be calculated. After the parameters are recorded, the correction servo motor 63 reverses its operation, moving the correction turning tool 61 away from the welding wheel 31. The welding wheel 31 can then resume pressurized rotary seam welding.

[0055] The thin-walled cylinder seam welding equipment of the present invention can realize fully automatic operation until the welding wheel 31 is too small and needs to be replaced, and then the operation is restarted.

[0056] The preferred embodiments of the present invention have been specifically described above, but the present invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all within the scope defined by the claims of this application.

Claims

1. Thin-walled cylinder seam welding equipment, characterized in that: There is an automatic feeding device at the front and an automatic welding machine at the rear; The automatic feeding device is equipped with automatic loading and unloading mechanism and welding detection device; The intersection of the automatic feeding device and the automatic welding machine is the welding station; There are welding wheel devices on both sides of the welding station. The automatic welding machine is equipped with a welding pressure device connected to the welding wheel device, a welding rotation drive device, and a welding wheel correction device matched with the welding wheel. There are two welding wheel devices, located on both sides of the welding station; the welding wheel device is equipped with freely rotatable welding wheels, and the welding wheels on both sides are symmetrically arranged relative to the welding station; A welding pressure device is provided on the rear side of the welding wheel device. The welding pressure device is a horizontal servo drive device equipped with a pressure servo motor. A welding rotation drive device is provided above the welding wheel device. The welding rotation drive device is provided with an actively rotating rotation drive wheel. The rotation drive wheel is in contact with the outer surface of the welding wheel, and the rotation drive wheel drives the welding wheel to rotate. A welding wheel correction device is provided at the lower rear portion of the welding wheel device. The welding wheel correction device includes a correction turning tool, a turning tool holder, and a correction servo motor. The output shaft of the correction servo motor is connected to the turning tool holder. The turning tool holder is a bracket with a horizontal guide mechanism, and a correction turning tool is installed on the inner end thereof. The blade of the correction turning tool matches the surface of the welding wheel. The correction servo motor is a torque feedback motor, and the pressurizing servo motor and the correction servo motor are connected to the same control system.

2. The thin-walled cylinder seam welding equipment according to claim 1, characterized in that: The welding wheel device comprises a welding wheel box, and a welding wheel is rotatably mounted on the bottom of the welding wheel box; A rotating conductive device is provided in the welding wheel box; the welding wheel is connected to one pole of the welding power supply of the automatic welding machine through the welding wheel box; The welding wheel on one side is connected to the positive pole of the welding power supply; the welding wheel on the other side is connected to the negative pole of the welding power supply.

3. The thin-walled cylinder seam welding equipment according to claim 2, characterized in that: A water cooling device is provided in the welding wheel box; a water cooling joint is provided on the outside of the welding wheel box; and the water cooling device is connected to an external cooling water source through the water cooling joint.

4. The thin-walled cylinder seam welding equipment according to claim 2, characterized in that: The welding pressure device includes a pressure servo motor and a horizontal conveying device; The end of the horizontal conveying device is connected to the welding wheel box.

5. The thin-walled cylinder seam welding equipment according to claim 1, characterized in that: The welding rotation drive devices on both sides are driven by the same rotation drive motor; It is equipped with 1 rotary drive motor and 2 rotary drive boxes; the rotary drive motor and the 2 rotary drive boxes are synchronously connected; Two rotary drive boxes are located above the welding wheel devices on both sides; The bottom output shaft of the rotary drive box is connected to the rotary drive wheel through a flexible coupling; The rotating driving wheel contacts or separates from the welding wheel through the swing mechanism; The swing mechanism is driven by a swing drive.

6. The thin-walled cylinder seam welding equipment according to claim 1 or 5, characterized in that: The rotating drive wheel has a groove that matches the surface of the welding wheel.

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