Welding device and welding method for pressure vessel manufacturing

Abstract

The invention relates to the technical field of pressure vessels, in particular to a welding device and method for pressure vessel manufacturing, and the welding device comprises a supporting table which is provided with a through groove; the upper supporting table is mounted on the supporting table; the detection mechanism is arranged on the upper support table, is used for detecting the welding position of the pressure container, and comprises a first electric push rod of which the output end is provided with a fixed frame; the lead screw is rotationally arranged on the fixing frame, a first connecting block is arranged on the lead screw in a threaded mode, and a first connecting groove is formed in the bottom of the first connecting block; the first motor is installed at one end of the fixing frame through a fixing frame and provides driving force for the lead screw; the second connecting block is slidably arranged in the first connecting groove, and a second connecting groove is formed in the bottom of the second connecting block; one end of the first spring is mounted on the second connecting block, and the other end of the first spring is connected with the first connecting groove; and the second contact piece is matched with the first contact piece, and the first contact piece is arranged on the second connecting block.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure vessels, and in particular to a welding device and a welding method for manufacturing pressure vessels. Background Art

[0002] In modern manufacturing, especially in the manufacturing process of important equipment such as pressure vessels, welding quality is crucial. Traditionally, the detection and adjustment of the welding position of workpieces mainly rely on manual operation, which is not only inefficient but also easily affected by human factors, resulting in unstable welding quality. With the development of automation technology, automated welding equipment has gradually become popular, but there are still challenges in accurately matching the welding circumferential seam positions of workpieces of different specifications. The traditional welding process requires multiple adjustments and detections, which takes a long time and is inefficient. In addition, the unloading after welding also relies on manual operation, further increasing the production cycle.

[0003] In response to this, the present invention proposes a welding device and a welding method for manufacturing pressure vessels to solve this problem. Summary of the Invention

[0004] The purpose of the present invention aims to solve at least one of the above technical defects.

[0005] For this reason, one object of the present invention is to provide a welding device and a welding method for manufacturing pressure vessels to solve the problems mentioned in the background art and overcome the deficiencies existing in the prior art.

[0006] To achieve the above object, an embodiment of one aspect of the present invention provides a welding device for pressure vessel manufacturing, including: a support table with a through groove formed thereon; an upper support table installed on the support table; a detection mechanism provided on the upper support table for detecting the welding position of the pressure vessel, including: a first electric push rod with a fixed frame installed at its output end; a lead screw rotatably arranged on the fixed frame, with a first connection block threadedly arranged on the lead screw, and a first connection groove formed at the bottom of the first connection block; a first motor installed at one end of the fixed frame through a fixed bracket to provide driving force for the lead screw; a second connection block slidably arranged in the first connection groove, with a second connection groove formed at the bottom of the second connection block; a first spring with one end installed on the second connection block and the other end connected to the first connection groove; a first contact piece and a second contact piece cooperating therewith, the first contact piece being arranged on the second connection block and the second contact piece being installed in the first connection groove; a third connection block slidably arranged in the second connection groove, with a steel ball rotatably arranged at the bottom of the third connection block; a second spring with one end installed on the third connection block and the other end connected to the second connection groove; a third contact piece and a fourth contact piece cooperating therewith, the third contact piece being arranged on the third connection block and the fourth contact piece being installed in the second connection groove; a discharging mechanism triggered by the detection mechanism for automatically discharging the workpiece, including: a fourth connection block with a third connection groove formed thereon, a slider slidably arranged in the third connection groove; a third spring with one end installed on the slider and the other end connected to the third connection groove; a fourth spring with one end installed on the fourth connection block and the other end connected to the fixed frame; a bidirectional lead screw with two sliding platforms threadedly arranged thereon, the sliding platforms being slidably arranged in the through groove, and a support roller rotatably arranged on the sliding platform, the bidirectional lead screw being connected to the fourth connection block through a linkage assembly; an unlocking plate for driving the slider to move; a clamping mechanism for clamping the workpiece and driving it to rotate, including: at least two second electric push rods all installed on the support table, with a support plate installed on the second electric push rod; a second motor installed on one of the support plates, with a driving plate installed at the output end of the second motor; a third electric push rod installed on the other support plate, with a positioning block installed at the output end of the third electric push rod, and a pressing block rotatably arranged on the positioning block; a welding head arranged at one end of the second connection block for welding the workpiece; a PLC controller serving as the central control element of the device.

[0007] Preferably, according to any of the above solutions, a first through hole and a second through hole are formed in the through groove, a guide rod is installed in the first through hole, the sliding platform is slidably arranged on the guide rod, and the bidirectional lead screw is rotatably arranged in the second through hole; a blanking plate is installed on the support table; a guide groove is formed on the upper support table.

[0008] Preferably, according to any of the above solutions, a guiding block is installed on the fixed frame, and the guiding block is slidably arranged in the guiding groove; a first sliding groove, a second sliding groove and a third sliding groove are formed in the fixed frame, a sliding block is slidably arranged inside the first sliding groove, the sliding block is installed on one side of the first connecting block, and the unlocking plate is installed in the first sliding groove; a straight slot opening is formed in the second connecting groove.

[0009] Preferably, according to any of the above solutions, the detection assembly further includes: an extension rod arranged in the straight slot opening and connected to the third connecting block; a fifth contact piece and a sixth contact piece cooperating therewith, the fifth contact piece is installed on the extension rod, and the sixth contact piece is installed in the straight slot opening; a commutation assembly for changing the rotation direction of the lead screw.

[0010] Preferably, according to any of the above solutions, the commutation assembly includes: a micro push rod installed on the fixed frame through a cross block; a support rod connected to the output end of the micro push rod, and two annular grooves are formed in the support rod; two first bevel gears, one of which is installed on the lead screw and the other is connected to the output end of the first motor; two second bevel gears, through holes are formed in the second bevel gears, annular blocks are installed in the through holes, and the two annular blocks are respectively rotatably arranged in the two annular grooves for cooperating with the first bevel gears to realize the output of force.

[0011] Preferably, according to any of the above solutions, a first vertical block is installed at the bottom of the fourth connecting block, and the first vertical block is slidably arranged in the second sliding groove; a limiting rod is slidably arranged on the fourth connecting block, the limiting rod is installed on the fixed frame, and a limiting plate is installed on the limiting rod.

[0012] Preferably, according to any of the above solutions, the linkage assembly includes: a rack installed on the fourth connecting block, a second vertical block is installed at the bottom of the rack, and the second vertical block is slidably arranged in the third sliding groove; a gear meshing with the rack, a first transmission rod is installed on the gear, a third bevel gear is installed on the first transmission rod, and the first transmission rod is rotatably arranged on a first support frame on the fixed frame; a second transmission rod, fourth bevel gears are installed at both ends thereof, and one of the fourth bevel gears meshes with the third bevel gear, and the second transmission rod is rotatably arranged on a second support frame on the fixed frame; a bracket is installed on the fixed frame, a fifth bevel gear is rotatably arranged on the bracket, the fifth bevel gear meshes with the other third bevel gear, a circular hole is formed in the fifth bevel gear, and a groove is formed in the circular hole; a third transmission rod is rotatably installed on a third support frame on the support table, a convex block is fixedly arranged on the third transmission rod, the circular hole is slidably arranged on the third transmission rod, and the convex block is slidably arranged in the groove; a sixth bevel gear is installed at the bottom of the third transmission rod; a seventh bevel gear meshing with the sixth bevel gear, and the seventh bevel gear is installed on the bidirectional lead screw.

[0013] Preferably, according to any of the above solutions, a seventh contact piece is installed on one of the support plates; an eighth contact piece is installed at one end of the drive plate, and the eighth contact piece is used to cooperate with the seventh contact piece.

[0014] Preferably, according to any of the above solutions, a connection frame is installed at one end of the welding head, and the connection frame is installed on the second connection block.

[0015] Using the welding equipment described in any of the above solutions, the welding method includes the following steps: S1: Place the pressure vessel cylinder body and the head to be welded to it on the support rollers to prepare for the next automatic adjustment and fixing steps; S2: The first and second electric push rods move synchronously in opposite directions: the first push rod drives the fixed frame to move downward, and the second push rod drives the support plate to move upward; S3: After the third connection block contacts the cylinder body, the pressure causes it to retract into the second connection groove; if it cannot move, the second connection block retracts into the first connection groove. After the contact pieces touch, the PLC controller stops the first and second push rods and starts the third push rod to bring the cylinder body and the head closer; S4: The first motor drives the lead screw to drive the steel ball to the junction of the cylinder body and the head. The steel ball is pushed into the gap under the action of the spring, the contact pieces are separated, and the PLC controller stops the first motor; S5: The second motor and the welding head are started. The second motor drives the workpiece to rotate, and the welding head welds the gap; S6: After welding, the steel ball moves upward under force, the contact pieces touch, the drive plate rotates one week. After the contact pieces touch, the PLC controller drives the second push rod to reset and starts the first motor to drive the lead screw, and automatically unloads the material in cooperation with the unloading assembly.

[0016] Compared with the prior art, the advantages and beneficial effects of the present invention are: The welding position is accurately determined through the steel ball and the contact pieces. The welding position is automatically detected throughout the process. The detection and matching of the welding position can be automatically completed without manual intervention, greatly improving the work efficiency. It can automatically adapt to the welding positions of workpieces of different specifications without replacing or adjusting the equipment, greatly enhancing the versatility and flexibility of the equipment.

[0017] The additional aspects and advantages of the present invention will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein: Figure 1 It is a first perspective schematic diagram according to an embodiment of the present invention; Figure 2 Schematic diagram of the second perspective according to an embodiment of the present invention; Figure 3 Schematic diagram of the detection mechanism according to an embodiment of the present invention; Figure 4 Schematic diagram of the installation of the welding head according to an embodiment of the present invention; Figure 5 According to an embodiment of the present invention Figure 4 Enlarged schematic diagram at position A in; Figure 6 Schematic diagram of the cross-section of the first connecting block according to an embodiment of the present invention; Figure 7 According to an embodiment of the present invention Figure 6 Enlarged schematic diagram at position B in; Figure 8 According to an embodiment of the present invention Figure 6 Enlarged schematic diagram at position C in; Figure 9 According to an embodiment of the present invention Figure 6 Enlarged schematic diagram at position D in; Figure 10 According to an embodiment of the present invention Figure 6 Enlarged schematic diagram at position E in; Figure 11 Schematic diagram of the movement of the steel ball according to an embodiment of the present invention; Figure 12 Exploded schematic diagram of the first bevel gear according to an embodiment of the present invention; Figure 13 Schematic diagram of the cross-section of the fourth connecting block according to an embodiment of the present invention; Figure 14 Schematic diagram of the linkage assembly according to an embodiment of the present invention; Figure 15 According to an embodiment of the present invention Figure 14 Enlarged schematic diagram at position F in; Figure 16 Schematic diagram of the connection of the fifth bevel gear according to an embodiment of the present invention; Figure 17 Schematic diagram of the connection of the support roller according to an embodiment of the present invention; Figure 18 Schematic diagram of the clamping mechanism according to an embodiment of the present invention; Figure 19 Exploded schematic diagram of the abutting block according to an embodiment of the present invention; Figure 20 Schematic diagram of the installation of the drive plate according to an embodiment of the present invention; Figure 21 According to an embodiment of the present invention Figure 20 Enlarged schematic diagram at position G in.

[0019] In the figure: 1. Support platform, 11. Blank discharging plate, 2. Upper support platform, 3. Detection mechanism, 31. First electric push rod, 32. Fixed frame, 33. Lead screw, 34. First connecting block, 3401. Second connecting block, 3402. First spring, 3403. First contact piece, 3404. Second contact piece, 3405. Third connecting block, 3406. Steel ball, 3407. Second spring, 3408. Third contact piece, 3409. Fourth contact piece, 35. First motor, 36. Sliding block, 37. Extension rod, 3701. Fifth contact piece, 3702. Sixth contact piece, 38. Commutation component, 3801. Micro push rod, 3802. Support rod, 3803. First bevel gear, 3804. Second bevel gear, 3805. Ring-shaped block, 4. Unloading mechanism, 41. Fourth connecting block, 42. Slide block, 43. Third spring, 44. Fourth spring, 45. Bi-directional lead screw, 4501. Slide table, 4502. Support roller, 46. Unlocking plate, 47. Limiting rod, 4701. Limiting plate, 48. Linkage component, 4801. Rack, 4802. Gear, 4803. First transmission rod, 4804. Second transmission rod, 4805. Bracket, 4806. Third transmission rod, 4807. Protrusion, 4808. Third bevel gear, 4809. Fourth bevel gear, 4810. Fifth bevel gear, 4811. Sixth bevel gear, 4812. Seventh bevel gear, 5. Clamping mechanism, 51. Second electric push rod, 52. Support plate, 5201. Seventh contact piece, 53. Second motor, 5301. Driving plate, 5302. Eighth contact piece, 54. Third electric push rod, 5401. Positioning block, 5402. Tightening block, 6. Welding head, 61. Connecting frame. Detailed implementation mode

[0020] As Figures 1 to 21 shown, a welding device and a welding method for pressure vessel manufacturing, which include a support platform 1, an upper support platform 2, a detection mechanism 3, an unloading mechanism 4, a clamping mechanism 5, a welding head 6 and a PLC controller.

[0021] Furthermore, a through groove is opened on the support platform 1, and this through groove is also used as a blank discharging groove. A blank discharging plate 11 is installed on the support platform 1. The blank discharging plate 11 is placed below the through groove and is inclined. A first through hole and a second through hole are opened in the through groove, and a guide rod is installed in the first through hole.

[0022] Furthermore, the upper support platform 2 is installed on the support platform 1, and a guide groove is opened on the upper support platform 2.

[0023] Furthermore, the detection mechanism 3 is arranged on the upper support platform 2 and is used for detecting the welding position of the pressure vessel, including: The first electric push rod 31, with a fixed frame 32 installed at its output end; A lead screw 33 is rotatably arranged on the fixed frame 32. A first connecting block 34 is threadedly arranged on the lead screw 33. A first connecting groove is formed at the bottom of the first connecting block 34; A first motor 35 is installed at one end of the fixed frame 32 through a fixing bracket to provide driving force for the lead screw 33; A second connecting block 3401 is slidably arranged in the first connecting groove. A second connecting groove is formed at the bottom of the second connecting block 3401; A first spring 3402, with one end installed on the second connecting block 3401 and the other end connected to the first connecting groove, provides a restoring force for the second connecting block 3401; A first contact piece 3403 and a second contact piece 3404 cooperating with it. The first contact piece 3403 is arranged on the second connecting block 3401, and the second contact piece 3404 is installed in the first connecting groove. In the non - working state, the first contact piece 3403 and the second contact piece 3404 are in a non - contact state. When they contact, the first electric push rod 31 and the second electric push rod 51 can be driven to stop for matching workpieces of different specifications; A third connecting block 3405 is slidably arranged in the second connecting groove. A steel ball 3406 is rotatably arranged at the bottom of the third connecting block 3405; A second spring 3407, with one end installed on the third connecting block 3405 and the other end connected to the second connecting groove, provides a restoring force for the third connecting block 3405. The elastic force of the second spring 3407 is less than the elastic force of the first spring 3402; A third contact piece 3408 and a fourth contact piece 3409 cooperating with it. The third contact piece 3408 is arranged on the third connecting block 3405, and the fourth contact piece 3409 is installed in the second connecting groove; A guide block is installed on the fixed frame 32. The guide block is slidably arranged in a guide groove. The cooperation between the guide block and the guide groove limits the movement track of the fixed frame 32; The fixed frame 32 is provided with a first sliding groove, a second sliding groove and a third sliding groove. A sliding block 36 is slidably arranged inside the first sliding groove. The sliding block 36 is installed on one side of the first connecting block 34; A straight slot opening is formed on the second connecting groove.

[0024] Specifically, it further includes: An extension rod 37 is arranged in the straight slot opening and connected to the third connecting block 3405; The fifth contact piece 3701 and the sixth contact piece 3702 that cooperate with it. The fifth contact piece 3701 is installed on the extension rod 37, and the sixth contact piece 3702 is installed in the straight notch. The fifth contact piece 3701 and the sixth contact piece 3702 are single-trigger contact pieces, serving the micro push rod 3801. The single trigger realizes the extension or retraction movement of the micro push rod 3801; The commutation assembly 38 is used to change the rotation direction of the lead screw 33 and includes: The micro push rod 3801 is installed on the fixed frame 32 through a cross block; The support rod 3802 is connected to the output end of the micro push rod 3801. Two annular grooves are provided on the support rod 3802; Two first bevel gears 3803, one of which is installed on the lead screw 33, and the other is connected to the output end of the first motor 35. The two first bevel gears 3803 are symmetrically arranged; Two second bevel gears 3804 are provided with through holes, and annular blocks 3805 are installed in the through holes. The two annular blocks 3805 are respectively rotatably arranged in the two annular grooves to cooperate with the first bevel gear 3803 to realize the output of force. The two second bevel gears 3804 are also symmetrically arranged. By changing the meshing between different second bevel gears 3804 and the first bevel gear 3803, the rotation direction of the lead screw 33 is changed.

[0025] Further, the unloading mechanism 4 is triggered by the detection mechanism 3 and is used for automatically unloading workpieces, including: The fourth connecting block 41 is provided with a third connecting groove, and a slider 42 is slidably arranged in the third connecting groove. One end of the slider 42 is a slope. The slope is arranged such that when the first connecting block 34 moves towards the slope, the slider 42 is driven to move into the third connecting groove. When the first connecting block 34 moves back, the flat surface at the other end of the slider 42 will drive the fourth connecting block 41 to move; The third spring 43 has one end installed on the slider 42 and the other end connected to the third connecting groove, providing a reset force for the slider 42; The fourth spring 44 has one end installed on the fourth connecting block 41 and the other end connected to the fixed frame 32; The bidirectional lead screw 45 is threadedly provided with two sliders 4501. The sliders 4501 are slidably arranged in the through groove. A support roller 4502 is rotatably arranged on the slider 4501. The bidirectional lead screw 45 is connected to the fourth connecting block 41 through a linkage assembly 48. The bidirectional lead screw 45 is rotatably arranged in the second through hole, and the slider 4501 is slidably arranged on the guide rod; The unlocking plate 46, with an L-shaped main body, is used to drive the slider 42 to move. The unlocking plate 46 is installed in the first chute. When the slider 42 moves to the unlocking plate 46, the inclined surface of the slider 42 contacts the unlocking plate 46, causing the slider 42 to be forced to move into the third connecting groove. The L-shaped structure ensures that the slider 42 will not move beyond the unlocking plate 46 to ensure the normal operation of the device; A first vertical block is installed at the bottom of the fourth connecting block 41, and the first vertical block is slidably arranged in the second chute; A limiting rod 47 is slidably arranged on the fourth connecting block 41. The limiting rod 47 is installed on the fixed frame 32. A limiting plate 4701 is installed on the limiting rod 47. The limiting plate 4701 is used to limit the position of the fourth connecting block 41, that is, the maximum position where the fourth spring 44 drives the fourth connecting block 41.

[0026] Specifically, the linkage assembly 48 includes: A rack 4801 is installed on the fourth connecting block 41. A second vertical block is installed at the bottom of the rack 4801, and the second vertical block is slidably arranged in the third chute; A gear 4802 meshes with the rack 4801. A first transmission rod 4803 is installed on the gear 4802. A third bevel gear 4808 is installed on the first transmission rod 4803. The first transmission rod 4803 is rotatably arranged on the first support frame of the fixed frame 32; A second transmission rod 4804 has fourth bevel gears 4809 installed at both ends. One of the fourth bevel gears 4809 meshes with the third bevel gear 4808. The second transmission rod 4804 is rotatably arranged on the second support frame of the fixed frame 32; A bracket 4805 is installed on the fixed frame 32. A fifth bevel gear 4810 is rotatably arranged on the bracket 4805. The fifth bevel gear 4810 meshes with the other third bevel gear 4808. A circular hole is formed on the fifth bevel gear 4810, and a groove is formed on the circular hole; A third transmission rod 4806 is rotatably installed on the third support frame of the support table 1. A convex block 4807 is fixedly arranged on the third transmission rod 4806. The circular hole is slidably arranged on the third transmission rod 4806, and the convex block 4807 is slidably arranged in the groove. The bracket 4805 is integrated with a hole, which allows the third transmission rod 4806 to move therein without contacting the hole wall. The convex block 4807 and the groove are arranged so that the fifth bevel gear 4810 can slide on the third transmission rod 4806 and can synchronously drive the third transmission rod 4806 to rotate, ensuring stable transmission while not affecting the up and down displacement movement of the fixed frame 32; A sixth bevel gear 4811 is installed at the bottom of the third transmission rod 4806; The seventh bevel gear 4812 meshes with the sixth bevel gear 4811, and the seventh bevel gear 4812 is mounted on the bidirectional lead screw 45.

[0027] Explanation: When discharging, as the bidirectional lead screw 45 rotates, the two sliding platforms 4501 move in a gradually separating direction, and the workpiece will move downward as the distance between the two sliding platforms 4501 increases. At this time, under the action of the first spring 3402, the second connecting block 3401 will be driven to move downward. Since the elastic force of the second spring 3407 is less than that of the first spring 3402, the third connecting block 3405 does not move to ensure the normal blanking of the workpiece.

[0028] Furthermore, the clamping mechanism 5 is used to clamp the workpiece and drive it to rotate, including: At least two second electric push rods 51 are all mounted on the support platform 1, and a support plate 52 is mounted on the second electric push rod 51; A second motor 53 is mounted on one of the support plates 52, and a driving plate 5301 is mounted at the output end of the second motor 53; A third electric push rod 54 is mounted on the other support plate 52, and a positioning block 5401 is mounted at the output end of the third electric push rod 54. A pressing block 5402 is rotatably arranged on the positioning block 5401; When the cylinder body and the head are clamped between the driving plate 5301 and the pressing block 5402, the two rotate with the driving plate 5301; A seventh contact piece 5201 is mounted on one of the support plates 52; One end of the driving plate 5301 is mounted with an eighth contact piece 5302, and the eighth contact piece 5302 is used to cooperate with the seventh contact piece 5201.

[0029] The seventh contact piece 5201, the eighth contact piece 5302, the third contact piece 3408 and the fourth contact piece 3409 all serve the first motor 35, that is, when they contact each other pairwise, the first motor 35 is in a state where it can be started.

[0030] Furthermore, the welding head 6 is provided at one end of the second connecting block 3401 for welding the workpiece; One end of the welding head 6 is mounted with a connecting frame 61, and the connecting frame 61 is mounted on the second connecting block 3401.

[0031] Furthermore, the PLC controller, as the central control element of this device, is electrically connected to each contact piece and the driving source, and issues different instructions according to the contact and disconnection of different contact pieces.

[0032] Furthermore, the pressure vessel includes a cylinder body and a head. The head is used as a sealing cover plate for the cylinder body. When the two are pressed tightly together, there will be a gap, and the gap specification is generally controlled between 1.5 mm and 2 mm. The specification of the steel balls 3406 in this device is also controlled within this value range.

[0033] A welding device and a welding method for the manufacture of pressure vessels, the working principle is as follows: S1: Place the pressure vessel cylinder body and the head to be welded to it on the support rollers 4502 to prepare for the next automatic adjustment and fixing steps; S2: After starting the device, the first electric push rod 31 and the second electric push rod 51 work synchronously but in opposite directions. The first electric push rod 31 drives a fixed frame 32 to move downward. This fixed frame 32 is connected to the first, second, and third connecting blocks 3405. The second electric push rod 51 drives the support plate 52 to move upward. A second motor 53 and a third electric push rod 54 are installed on this support plate 52; S3: As the third connecting block 3405 moves downward and contacts the cylinder body, the continuously applied pressure will cause the third connecting block 3405 to retract into the second connecting groove. If the third connecting block 3405 can no longer move, the force is transferred so that the second connecting block 3401 also retracts into the first connecting groove. When both connecting blocks can no longer move further, through the contact of the contact pieces (the first and second contact pieces 3404, and the third and fourth contact pieces 3409), under the action of the PLC controller, the operation of the first and second electric push rods 51 is automatically stopped, and the third electric push rod 54 is started to press the cylinder body and the head close together; S4: The first motor 35 is started to drive the lead screw 33, driving the steel balls 3406 to move on the cylinder body. When the steel balls 3406 move to the junction of the cylinder body and the head, the steel balls 3406 are pushed to the gap under the action of the second spring 3407, and the third contact piece 3408 and the fourth contact piece 3409 are separated. Under the action of the PLC controller, the first motor 35 is automatically stopped. At this time, the seventh contact piece 5201 and the eighth contact piece 5302 are in contact to change the rotation direction of the lead screw 33 again; S5: Immediately afterwards, the second motor 53 and the welding head 6 are started. The second motor 53 drives the workpiece to rotate, and the welding head 6 welds the gap between the two workpieces; S6: As the welding progresses, the gap is filled, causing the steel ball 3406 to move upward under force (the workpiece is in a continuous rotating state. As the weld seam is filled and moves, the steel ball 3406 first contacts the position after welding, causing the steel ball 3406 to move upward under force, and then the third and fourth contacts 3409 come into contact. However, at this time, the seventh and eighth contacts 5302 do not contact, so the first motor 35 is still in a state where it cannot be started), causing the third contact 3408 to contact the fourth contact 3409. At this time, the drive plate 5301 rotates one week, causing the seventh contact 5201 to contact the eighth contact 5302. Under the action of the PLC controller, the second electric push rod 51 is driven to perform a reset operation, and the first motor 35 is started to drive the lead screw 33 to move, driving the first connecting block 34, and cooperating with the unloading assembly to automatically unload the workpiece. Specifically, through the gradual movement of the first connecting block 34, one end of the first connecting block 34 contacts the flat end of the slide plate, causing the slider 42 to be stressed and drive the fourth connecting block 41 to move. The fourth connecting block 41 drives the rack 4801 to move, thereby driving the gear 4802 to rotate, and further driving the bidirectional lead screw 45 to rotate to drive the slide 4501 to move.

Claims

1. A welding device for the manufacture of pressure vessels, characterized in that: Including: A support platform with a through groove formed thereon; An upper support platform installed on the support platform; A detection mechanism provided on the upper support platform for detecting the welding position of a pressure vessel, including: A first electric push rod with a fixed frame installed at its output end; A lead screw rotatably arranged on the fixed frame. A first connecting block is threadedly arranged on the lead screw, and a first connecting groove is formed at the bottom of the first connecting block; A first motor installed at one end of the fixed frame through a fixed bracket to provide driving force for the lead screw; A second connecting block slidably arranged in the first connecting groove, and a second connecting groove is formed at the bottom of the second connecting block; A first spring with one end installed on the second connecting block and the other end connected to the first connecting groove; A first contact piece and a second contact piece cooperating therewith. The first contact piece is provided on the second connecting block, and the second contact piece is installed in the first connecting groove; A third connecting block slidably arranged in the second connecting groove, and a steel ball is rotatably arranged at the bottom of the third connecting block; A second spring with one end installed on the third connecting block and the other end connected to the second connecting groove; A third contact piece and a fourth contact piece cooperating therewith. The third contact piece is provided on the third connecting block, and the fourth contact piece is installed in the second connecting groove; A discharging mechanism triggered by the detection mechanism for automatically discharging workpieces, including: A fourth connecting block with a third connecting groove formed thereon, and a slider is slidably arranged in the third connecting groove; A third spring with one end installed on the slider and the other end connected to the third connecting groove; A fourth spring with one end installed on the fourth connecting block and the other end connected to the fixed frame; A bidirectional lead screw with two sliding platforms threadedly arranged thereon. The sliding platforms are slidably arranged in the through groove, and a support roller is rotatably arranged on the sliding platforms. The bidirectional lead screw is connected to the fourth connecting block through a linkage assembly; An unlocking plate for driving the slider to move; A clamping mechanism for clamping and driving the workpiece to rotate, including: At least two second electric push rods, all installed on the support platform, and a support plate is installed on the second electric push rods; A second motor installed on one of the support plates, and a driving plate is installed at the output end of the second motor; A third electric push rod installed on the other support plate, and a positioning block is installed at the output end of the third electric push rod. A pressing block is rotatably arranged on the positioning block; A welding head provided at one end of the second connecting block for welding the workpiece; A PLC controller serving as the central control element of this device.

2. The welding device for manufacturing a pressure vessel according to claim 1, characterized in that: A first through hole and a second through hole are formed in the through groove. A guide rod is installed in the first through hole, the sliding platform is slidably arranged on the guide rod, and the bidirectional lead screw is rotatably arranged in the second through hole; A blanking plate is installed on the support platform; A guide groove is formed on the upper support platform.

3. A welding device for manufacturing a pressure vessel according to claim 2, characterized in that: A guide block is installed on the fixed frame, and the guide block is slidably arranged in the guide groove; A first sliding groove, a second sliding groove and a third sliding groove are formed on the fixed frame. A sliding block is slidably arranged inside the first sliding groove. The sliding block is installed on one side of the first connecting block, and the unlocking plate is installed in the first sliding groove; A straight notch is formed on the second connecting groove.

4. The welding device for manufacturing a pressure vessel according to claim 3, wherein: The detection assembly further includes: An extension rod is arranged in the straight groove and connected to the third connecting block; A fifth contact piece and a sixth contact piece cooperating therewith, the fifth contact piece is mounted on the extension rod, and the sixth contact piece is mounted in the straight groove; A commutation assembly for changing the rotation direction of the lead screw.

5. The welding device for manufacturing pressure vessels according to claim 4, characterized in that: The commutation assembly includes: A micro push rod is mounted on the fixed frame through a cross block; A support rod is connected to the output end of the micro push rod, and two annular grooves are provided on the support rod; Two first bevel gears, one of which is mounted on the lead screw and the other is connected to the output end of the first motor; Two second bevel gears are provided with through holes, annular blocks are mounted in the through holes, and the two annular blocks are respectively rotatably arranged in the two annular grooves for cooperating with the first bevel gears to realize force output.

6. The welding device for manufacturing pressure vessels according to claim 1, characterized in that: A first vertical block is mounted at the bottom of the fourth connecting block, and the first vertical block is slidably arranged in the second chute; A limiting rod is slidably arranged on the fourth connecting block, the limiting rod is mounted on the fixed frame, and a limiting plate is mounted on the limiting rod.

7. A welding device for manufacturing a pressure vessel according to claim 3, characterized in that: The linkage assembly includes: A rack is mounted on the fourth connecting block, a second vertical block is mounted at the bottom of the rack, and the second vertical block is slidably arranged in the third chute; A gear meshes with the rack, a first transmission rod is mounted on the gear, a third bevel gear is mounted on the first transmission rod, and the first transmission rod is rotatably arranged on the first support frame of the fixed frame; A second transmission rod is mounted with fourth bevel gears at both ends, and one of the fourth bevel gears meshes with the third bevel gear. The second transmission rod is rotatably arranged on the second support frame of the fixed frame; A bracket is mounted on the fixed frame, a fifth bevel gear is rotatably arranged on the bracket, the fifth bevel gear meshes with another third bevel gear, a circular hole is provided on the fifth bevel gear, and a groove is provided on the circular hole; A third transmission rod is rotatably mounted on the third support frame of the support table, a convex block is fixedly provided on the third transmission rod, the circular hole is slidably arranged on the third transmission rod, and the convex block is slidably arranged in the groove; A sixth bevel gear is mounted at the bottom of the third transmission rod; A seventh bevel gear meshes with the sixth bevel gear, and the seventh bevel gear is mounted on the bidirectional lead screw.

8. A welding device for manufacturing pressure vessels according to claim 1, characterized in that: A seventh contact piece is mounted on one of the support plates; One end of the drive plate is mounted with an eighth contact piece for cooperating with the seventh contact piece.

9. The welding device for manufacturing a pressure vessel according to claim 1, characterized in that: One end of the welding head is mounted with a connection frame, and the connection frame is mounted on the second connecting block.

10. The welding method of the welding device according to claims 1-9, characterized in that: It includes the following steps: S1: Place the pressure vessel cylinder body and the head to be welded thereto on the support rollers to prepare for the subsequent automatic adjustment and fixing steps; S2: The first and second electric push rods move synchronously in opposite directions: the first push rod drives the fixed frame to move downward, and the second push rod drives the support plate to move upward; S3: After the third connecting block contacts the cylinder body, the pressure causes it to retract into the second connecting groove; if it cannot move, the second connecting block retracts into the first connecting groove. After the contact pieces touch, the PLC controller stops the first and second push rods and starts the third push rod to bring the cylinder body and the head closer; S4: The first motor drives the lead screw to drive the steel balls to the junction of the cylinder body and the head. The steel balls are pushed into the gap under the action of the spring, the contact piece disengages, and the PLC controller stops the first motor; S5: The second motor and the welding head are started. The second motor drives the workpiece to rotate, and the welding head welds the gap; S6: After welding, the steel balls move upward under force, the contact piece contacts, the drive plate rotates one week. After the contact piece contacts, the PLC controller drives the second push rod to reset and starts the first motor to drive the lead screw, and automatically discharges materials in cooperation with the discharging component.

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