Large plastic thick plate butt welding machine

Abstract

The present application relates to the technical fields of plastic hot plate welding, in particular to a large plastic thick plate butt welding machine, which comprises a base, a group of butt welding devices arranged in a lifting mode in the middle top of the base, and a group of heating plates arranged in a lifting mode between the side supports of the two heating plates. Two groups of mobile welding tables I and II are arranged on the base on the two sides of the butt welding devices in a relative moving mode. An adaptive fixing mechanism is arranged on the two sides of the butt welding devices. A main driving device is arranged on one side of the top of the base. The main driving device comprises a power base fixed on one side of the top of the base through a support frame, a driving assembly arranged on the bottom of the power base, and a rotating assembly arranged on the top of the power base. The rotating assembly is rotationally connected with the driving assembly. The driving assembly is rotationally connected with the butt welding devices and the adaptive fixing mechanism through a rotating connector I and a rotating connector II. The present application has the advantages of automatic operation, simple operation, energy saving and high efficiency.

Description

Technical Field

[0001] This invention relates to the field of plastic hot plate welding technology, specifically a large-scale plastic thick plate butt welding machine. Background Technology

[0002] In recent years, plastic products have been widely used. The filter plates, a major component of filter presses, are primarily made of plastic. Besides being molded in one piece, plastic plates can also be formed through welding, increasing the usable area and meeting more application requirements. When welding plastic plates, butt welding machines are generally the most commonly used method.

[0003] A butt welding machine is a device used for welding metals, primarily for joining two metal workpieces together by heating and pressurizing. Butt welding machines are widely used in industries such as automobile manufacturing, construction, pipeline installation, and metal processing.

[0004] Existing butt welding machines generally have the following problems when used for butt welding large plastic thick plates: In most cases, manual intervention is required for the movement and feeding of plastic plates and the unloading after welding. Controlling the movement of plastic plates, the lifting and lowering of heating plates, and the lifting and moving of fixing devices all require the use of corresponding power systems. There is a lack of effective communication between them, resulting in high energy consumption during processing. Moreover, the lack of linkage between the various processes affects the welding speed and efficiency of plastic thick plates.

[0005] Therefore, in view of the above-mentioned problems, this technical solution proposes a large-scale plastic thick plate butt welding machine. Summary of the Invention

[0006] The purpose of this invention is to provide a large-scale plastic thick plate butt welding machine to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a large plastic thick plate butt welding machine, including a machine base, a set of butt welding devices is lifted and arranged in the middle of the top of the machine base, the butt welding devices include heating plate side supports fixed on the two side walls of the machine base, and a set of heating plates is lifted and arranged between the two heating plate side supports.

[0008] Two sets of movable welding tables I and movable welding tables II are installed on the corresponding bases on both sides of the lower part of the welding device. Large plastic plates to be welded are placed on the top of movable welding tables I and movable welding tables II. The plastic plates that are moved to the lower side of the heating plate are first heated and melted by the heating plate. Then the heating plate is raised and movable welding tables I and movable welding tables II are moved again to make contact welding of the melted plastic plate side walls.

[0009] The adaptive fixing mechanism is provided with two sets installed on both sides of the welding device to adaptively roll and hold the plastic thick plate for positioning. Since the plastic thick plates on both sides need to move twice during welding, after the first rolling and holding positioning, the rolling contact is used to synchronously roll along the upper surface of the plastic thick plate during the second movement of the plastic thick plate, thus maintaining its real-time holding positioning.

[0010] The main drive unit, located on one side of the top of the machine base, is used to drive the relative movement of the mobile welding table I and the mobile welding table II, as well as the lifting and lowering of the welding device and the adaptive fixing mechanism. The main drive unit includes a power base fixed to one side of the top of the machine base by a support frame. A drive assembly is installed at the bottom of the power base, and a rotating assembly is installed at the top. The rotating assembly is rotatably connected to the drive assembly. The drive assembly controls the relative movement of the mobile welding table I and the mobile welding table II by telescopic operation, and synchronously drives the rotating assembly to rotate. Rotary connecting parts I and II are respectively provided between the drive assembly and the welding device and the adaptive fixing mechanism. When the drive assembly rotates, the rotating connecting part I drives the welding device to lift and lower, thereby controlling the heating plate to heat and melt the side walls of the plastic thick plates on both sides. The rotating connecting part II drives the adaptive fixing mechanisms on both sides to roll and press and position the plastic thick plates on their lower sides, thereby realizing the linear movement control of the transfer of the plastic thick plates. At the same time, the linear motion is converted into rotational motion to control the lifting and lowering of the welding device and the adaptive fixing mechanism.

[0011] Two large plastic plates to be welded are placed on two movable welding platforms, I and II, respectively. The drive assembly is activated, causing platforms I and II to move closer together. At this point, the rotating assembly rotates under pressure. Then, connected by rotating connectors I and II, the sidewalls of the plastic plates and the heating plate move synchronously until both sides of the heating plate simultaneously contact the sidewalls of the plastic plates. Simultaneously, under the control of rotating connector II, the adaptive fixing mechanism descends synchronously, rolling and positioning the plastic plates. The sidewalls of the plastic plates are then heated and melted. After melting, the drive assembly continues to move platforms I and II closer together. At this point, the welding device, under the action of rotating connector I, lifts the heating plate. Because the sides of the plastic plates are molten, the heating plate can easily... The two sides rise and separate, and then the adaptive fixing mechanism presses and rolls along the top of the plastic thick plate until the side walls of the two plastic thick plates contact each other for welding. At this time, the drive component drives the moving welding table I and the moving welding table II to move closer to each other to the maximum extent. After the welding is completed, the drive component continues to run in the opposite direction, driving the moving welding table I and the moving welding table II to move back. At this time, the adaptive fixing mechanism rises and releases the pressure on the plastic thick plate. At this time, the two plastic thick plates are welded together. As the moving welding table I and the moving welding table II separate, the plastic thick plate will also move towards one side, thereby automating the output. This realizes that the heating plate lifting and lowering, the moving of the moving welding table I and the moving welding table II, the lifting and lowering of the adaptive fixing mechanism, and the automated welding operation of the plastic thick plate can be controlled simultaneously using a single drive structure, realizing the energy-saving and efficient operation mode of this welding machine.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: by setting up a set of hydraulic cylinders for telescopic operation, in conjunction with the surrounding telescopic rods II and I, external side racks, internal side racks, and spur gears, the relative movement of the moving welding table I and the moving welding table II is controlled, thereby controlling the feeding and discharging of the plastic thick plate. Then, in conjunction with the rotating component, the telescopic operation of the hydraulic cylinders is converted into rotational motion, and this rotational kinetic energy is used for the lifting and lowering of the heating plate and the lifting and lowering of the pressure positioning roller. Furthermore, by utilizing the effective cooperation between the various structures, the precise positioning, heating, welding, and transfer of the plastic thick plate are accurately controlled, achieving fully automated operation and realizing the high-efficiency and energy-saving operation mode of this welding machine. Attached Figure Description

[0013] Figure 1 This is a first-view structural schematic diagram of a large plastic thick plate butt welding machine.

[0014] Figure 2 This is a second-view structural schematic diagram of a large plastic thick plate butt welding machine.

[0015] Figure 3This is a top view schematic diagram of a large plastic thick plate butt welding machine.

[0016] Figure 4 This is a schematic diagram of the main structure of a large plastic thick plate butt welding machine.

[0017] Figure 5 for Figure 1 A magnified structural diagram of A in the diagram.

[0018] Figure 6 for Figure 2 A magnified structural diagram of B in the diagram.

[0019] Figure 7 for Figure 1 A magnified structural diagram of C.

[0020] Figure 8 for Figure 1 A magnified structural diagram of D in the diagram.

[0021] Figure 9 for Figure 1 A magnified structural diagram of E in the middle;

[0022] The components include: base 10, movable welding table I 11, movable welding table II 12, power base 13, hydraulic cylinder 14, outrigger 15, heating plate 16, heating plate side bracket 17, fixed connecting rod 18, nut 19, lead screw 20, telescopic rod positioning block 21, connecting plate II 22, connecting plate I 23, hydraulic rod 24, telescopic rod II 25, telescopic rod I 26, external side rack 27, internal side rack 28, spur gear 29, main rotating shaft 30, bevel gear I 31, bevel gear II 32, connecting rod 33, and bevel gear II. Gear III 34, bevel gear IV 35, support shaft 36, transmission belt I 37, L-shaped support sleeve 38, U-shaped bracket 39, pressure fixing component lifting base plate 40, connecting column 42, pressure positioning roller 43, bushing 44, slider 45, slide rail 46, drive gear 47, incomplete toothed plate 48, bevel gear V 50, bevel gear VI 51, bevel gear VII 52, transmission belt II 53, bevel gear VIII 54, bevel gear IX 55, transmission belt III 56, transmission belt IV 57, transmission shaft 58, shaft rod 59, suction cup 60. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0024] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] Please see Figures 1-4 A large plastic thick plate butt welding machine includes a base 10, a set of butt welding devices is lifted and installed in the top center of the base 10, the butt welding devices include heating plate side brackets 17 fixed on both side walls of the base 10, and a set of heating plates 16 is lifted and installed between the two heating plate side brackets 17.

[0028] Two sets of movable welding tables I11 and II12 are relatively movable on the bases 10 on both sides of the lower part of the welding device. Large plastic plates to be welded are placed on the top of the movable welding tables I11 and II12. The plastic plates that are moved to the lower side of the heating plate 16 are first heated and melted by the heating plate 16. Then the heating plate 16 is raised, and the movable welding tables I11 and II12 are moved again to make contact welding of the melted plastic plate side walls.

[0029] The adaptive fixing mechanism is provided with two sets installed on both sides of the welding device to adaptively roll and hold the plastic thick plate for positioning. Since the plastic thick plates on both sides need to move twice during welding, after the first rolling and holding positioning, the rolling contact is used to synchronously roll along the upper surface of the plastic thick plate during the second movement of the plastic thick plate, thus maintaining its real-time holding positioning.

[0030] The main drive unit, located on one side of the top of the base 10, is used to drive the relative movement of the movable welding table I 11 and the movable welding table II 12, as well as the lifting and lowering of the welding device and the adaptive fixing mechanism. The main drive unit includes a power base 13 fixed to one side of the top of the base 10 by a support frame. A drive assembly is installed at the bottom of the power base 13, and a rotating assembly is installed at the top. The rotating assembly is rotatably connected to the drive assembly. The drive assembly controls the relative movement of the movable welding table I 11 and the movable welding table II 12 by telescopic movement, and synchronously drives the rotating assembly to rotate. Rotary connecting parts I and II are respectively provided between the drive assembly and the welding device and the adaptive fixing mechanism. When the drive assembly rotates, the rotating connecting part I drives the welding device to lift and lower, thereby controlling the heating plate 16 to heat and melt the side walls of the plastic thick plates on both sides. The rotating connecting part II drives the adaptive fixing mechanisms on both sides to roll and press and position the plastic thick plates on their lower sides, thereby realizing the linear movement control of the transfer of the plastic thick plates. At the same time, the linear motion is converted into rotational motion to control the lifting and lowering of the welding device and the adaptive fixing mechanism.

[0031] Two large plastic plates to be welded are placed on two movable welding platforms I11 and II12 respectively. The drive assembly is activated, causing the movable welding platforms I11 and II12 to move closer together. At this time, the rotating assembly rotates under force. Then, under the connection of rotating connector I and rotating connector II, the side walls of the two plastic plates and the heating plate 16 move synchronously until the heating plate 16 simultaneously contacts the side walls of the two plastic plates. Simultaneously, under the control of rotating connector II, the adaptive fixing mechanism also descends synchronously, rolling and positioning the plastic plates. Then, the side walls of the plastic plates are heated and melted. After melting, the drive assembly continues to move the movable welding platforms I11 and II12 closer together. At this time, under the action of rotating connector I, the welding device is forced to lift the heating plate 16. Since the sides of the plastic plates are in a molten state, the heating plate 16 can easily... The heating plate 16 is separated from the two sides, and then the adaptive fixing mechanism presses and rolls along the top of the plastic plate until the side walls of the two plastic plates contact each other for welding. At this time, the drive component drives the moving welding table I 11 and the moving welding table II 12 to move closer to each other to the maximum extent. After the welding is completed, the drive component continues to run in the opposite direction, driving the moving welding table I 11 and the moving welding table II 12 back. At this time, the adaptive fixing mechanism rises and releases the pressure on the plastic plate. At this time, the two plastic plates are welded together. As the moving welding table I 11 and the moving welding table II 12 separate, the plastic plate will also move towards one side, thereby automatically outputting it. This realizes that the heating plate 16 can be raised and lowered, the moving welding table I 11 and the moving welding table II 12 can be moved, the adaptive fixing mechanism can be raised and lowered, and the welding operation of the plastic plate can be automatically controlled by a single drive structure, realizing the energy-saving and efficient operation mode of this welding machine.

[0032] In this embodiment of the invention, multiple support legs 15 are fixedly installed at the four corners of the bottom of the base 10 to support the stability of the base 10.

[0033] To ensure that the plastic plates on both sides are welded together, as the moving welding table I 11 and the moving welding table II 12 move away from each other, the plastic plates can be output along the moving welding table II 12 on the side away from the power base 13. By uniformly arranging multiple sets of suction cups 60 on the top of the moving welding table II 12, the suction cups 60 adsorb the bottom of the plastic plates, ensuring that the plastic plates can be moved out along with the moving welding table II 12 after being positioned by the adaptive fixing mechanism in the urban area.

[0034] Among them, the heating plate 16 has two sides as heating surfaces, and the width of the heating surfaces is greater than the width of the side wall of the plastic plate to ensure that the two sides of the plastic plate are fully heated and melted. The heating plate 16 has slide bars installed at both ends, and the side wall of the heating plate side bracket 17 corresponding to the slide bars has a longitudinal slide groove. The slide bars move along the longitudinal slide groove to ensure that they can be raised and lowered smoothly when driven by the rotating connecting piece I.

[0035] In one embodiment of the present invention, see [reference] Figure 1 , Figure 2 , Figure 6 The drive assembly includes a hydraulic cylinder 14 fixedly installed on one side of the center of the power base 13. A hydraulic rod 24 is connected to the output end of the hydraulic cylinder 14. A connecting plate II 22 and a connecting plate I 23 are fixedly installed on the center of the bottom of the movable welding table I 11 and the movable welding table II 12, respectively. The end of the hydraulic rod 24 is fixedly connected to the center of the side wall of the connecting plate II 22. That is, by activating the hydraulic cylinder 14, the hydraulic rod 24 is extended or retracted, thereby causing the movable welding table I 11 to move laterally. Two sets of power steering components are symmetrically arranged at the bottom of the power base 13 on both sides of the hydraulic cylinder 14. Extending towards the movable welding table I 11 and movable welding table II 12, the power steering component includes two sets of telescopic rods II 25 and I 26 distributed parallel to the hydraulic rod 24. Telescopic rod positioning blocks 21 are installed at both ends of the bottom of the power base 13 corresponding to telescopic rods II 25 and I 26. Telescopic rods II 25 and I 26 move through the telescopic rod positioning blocks 21 to maintain stable horizontal movement of the telescopic rods II 25 and I 26. The end of telescopic rod I 26 facing the movable welding table II 12 moves through the end of the movable welding table I 11 and is fixedly connected. On the side wall of the movable welding table II12, the end of the telescopic rod II25 facing the movable welding table I11 is fixed to the side wall of the movable welding table I11. At the same time, an internal side rack 28 and an external side rack 27 are fixedly installed on the telescopic rods II25 and I26 respectively, located between the positioning base blocks 21 on both sides. A set of spur gears 29 meshes between the external side rack 27 and the internal side rack 28. The top of the spur gear 29 is rotatably set at the bottom of the power base 13. That is, when the hydraulic cylinder 14 operates to control the extension and retraction of the hydraulic rod 24, the horizontal movement of the movable welding table I11 is controlled by the hydraulic cylinder 14. The movement causes the built-in side rack 28 on the telescopic rod II 25 to mesh and rotate with the spur gear 29. Then, the meshing of the spur gear 29 with the external side rack 27 causes the telescopic rod I 26 to move in the opposite direction. The fixed connection between the telescopic rod I 26 and the movable welding table II 12 controls the relative movement of the movable welding table I 11 and the movable welding table II 12. At the same time, the spur gear 29 is rotating. The top of the spur gear 29 moves through the power base 13 and connects to the rotating component, thereby partially converting the linear motion of the hydraulic cylinder 14 into the rotational motion of the rotating component.

[0036] As a preferred embodiment of the present invention, see [reference]. Figure 1 The rotating assembly includes a main rotating shaft 30 fixedly connected to the top of the spur gear 29. A bevel gear I 31 is mounted on the top of the main rotating shaft 30. A bevel gear II 32 is vertically meshed on one side of the bevel gear I 31. A connecting rod 33 is connected to the side of the bevel gear II 32 facing the heating plate 16. A bevel gear III 34 is mounted on the end of the connecting rod 33. A bevel gear IV 35 is vertically meshed on one side of the bevel gear III 34. The bottom of the bevel gear IV 35 is rotatably supported by a support shaft 36. That is, when the nut 19 rotates, it drives the main rotating shaft 30 to rotate synchronously. Then, under the rotational connection of the bevel gear I 31, bevel gear II 32, connecting rod 33, bevel gear III 34, and bevel gear IV 35, the support shaft 36 is driven to rotate. The support shaft 36 is rotatably connected to the rotating connecting piece I and the rotating connecting piece II.

[0037] As a preferred embodiment of the present invention, see [reference]. Figures 1-4 The rotating connecting component I includes a fixed connecting rod 18 installed on the side of the heating plate 16 facing the power base 13. A nut 19 is connected to the top of the fixed connecting rod 18. A vertical lead screw 20 is threadedly connected to the middle of the nut 19. A guide device for limiting its rotation is provided on the nut 19. Guide rods are installed at both ends of the lead screw 20. The top guide rod is supported and positioned by an L-shaped support sleeve rod 38. The top guide rod is rotatably connected to the support shaft 36 on the corresponding side by a transmission belt I 37. By setting the tooth groove direction and the length of the lead screw 20, it is ensured that when the lead screw 20 is rotated under the rotational connection of the transmission belt I 37, the connection of the nut 19 and the fixed connecting rod 18 can control the heating plate 16 to move accurately between the two plastic thick plate side walls.

[0038] As a preferred embodiment of the present invention, see [reference]. Figures 1-4 , Figure 7 , Figure 8 The adaptive fixing mechanism includes multiple sets of pressure positioning rollers 43 arranged in parallel. Roller shafts are installed at both ends of the pressure positioning rollers 43. A set of triangular bushings 44 are fitted together between the roller shafts on the same side. A pressure fixing lifting base plate 40 is connected between the tops of the bushings 44 at both ends through a connecting column 42. A U-shaped bracket 39 is slidably connected to the outside of both sides of the pressure fixing lifting base plate 40. One side of the bottom end of the U-shaped bracket 39 is fixed to the base 10. A slide rail 46 is provided on the side wall of the U-shaped bracket 39 facing the pressure fixing lifting base plate 40. A slider 45 is installed on the side wall of the pressure fixing lifting base plate 40 corresponding to the slide rail 46. The slider 45 slides longitudinally along the slide rail 46 to maintain the lifting of the pressure fixing lifting base plate 40, thereby controlling the rolling pressure and positioning of the plastic thick plate by the pressure positioning rollers 43.

[0039] A lifting assembly is provided on the side of the pressure fixing component lifting base plate 40 facing the heating plate 16. The two lifting assemblies are rotatably connected, and the lifting assembly on the side closer to the power base 13 is rotatably connected to the rotating connector II. That is, under the operation of the rotating connector II, the lifting assembly is controlled to drive the pressure positioning roller 43 to move up and down, thereby positioning the plastic plate. The lifting assembly has an adaptive pressing function, that is, when pressing the plastic plate once, it contacts and positions it. As the two plastic plates continue to approach each other, the longitudinal pressing force of the lifting assembly on the plastic plate remains unchanged.

[0040] Specifically, the lifting assembly includes an incomplete toothed plate 48 installed on the side wall of the lifting base plate 40 of the pressure fixing component facing the heating plate 16. A drive gear 47 is engaged on one side of the incomplete toothed plate 48. Wheel rods are installed at both ends of the drive gear 47. Positioning rods are fitted on the wheel rods. The ends of the positioning rods are fixed to the adjacent U-shaped bracket 39. The drive gears 47 on both sides are symmetrically distributed. A set of transmission shafts 58 is provided above the heating plate 16 between the two drive gears 47. The transmission shafts 58 and the wheel rods on the two drive gears 47 are rotatably connected by transmission belts III 56 and IV 57 respectively. One end of the transmission shaft 58 is connected to a shaft 59. The bottom of the shaft 59 is fixed to the heating plate side bracket 17 by a bracket.

[0041] It should be noted that the top of the incomplete toothed plate 48 is set as a region without tooth grooves. When the drive gear 47 moves the incomplete toothed plate 48 downward to this region, the drive gear 47 is in an idle state and performs the action of moving the tooth groove at the top, that is, maintaining a stable downward pressure on the incomplete toothed plate 48.

[0042] To keep the two drive gears 47 rotating in opposite directions, and then cooperate with the incomplete toothed plate 48 to drive the pressure positioning roller 43 at the bottom of the pressure fixing component lifting base plate 40 to roll and hold the plastic thick plate, a set of steering connectors are provided on the wheel rod of the drive gear 47 near the power base 13. The steering connectors are rotatably connected to the rotating connectors II. The rotating connectors II drive the wheel rod to rotate, and then cooperate with the transmission belts III 56, IV 57, and the transmission shaft 58 to drive the drive gear 47 on the opposite side to rotate in the same direction. Then, under the action of the steering connectors, the drive gear 47 on the side adjacent to the power base 13 is driven to rotate in the opposite direction to the rotating connectors II, thereby realizing the lifting and lowering of the pressure positioning rollers 43 on both sides in the same direction.

[0043] The steering connector includes two sets of parallel bevel gears V50 and VII52 mounted on the drive gear 47. A set of bevel gears VI51 meshes between bevel gears V50 and VII52. A connecting guide rod is mounted on the side of bevel gear VII52 away from bevel gear V50. The connecting guide rod is rotatably connected to the rotating connector II. That is, by utilizing the rotatable connection between bevel gears V50, VI51, and VII52, the connecting guide rod rotates in the opposite direction to bevel gear V50, thereby driving the drive gear 47 to rotate.

[0044] Specifically, the bevel gear VI51 is positioned on one side by a support rod.

[0045] As a preferred embodiment of the present invention, see [reference]. Figures 1-4 , Figure 5 , Figure 9 The rotating connector II includes a transmission belt II 53 rotatably connected to the connecting guide rod. A gear shaft is connected to the end of the transmission belt II 53. A bevel gear VIII 54 is connected to one side of the gear shaft. A bevel gear IX 55 fixed on the support shaft 36 is vertically meshed with one side of the bevel gear VIII 54. When the support shaft 36 rotates, it drives the bevel gear IX 55 to rotate synchronously. Then, it controls the rotation of the bevel gear VIII 54, which in turn drives the connecting guide rod to rotate under the transmission of the transmission belt II 53. This, in conjunction with the steering connector, transmission belt III 56, transmission belt IV 57, transmission shaft 58, etc., drives the pressure positioning rollers 43 on both sides to move up and down synchronously, thereby realizing the rolling positioning of the plastic thick plate.

[0046] The working principle of this invention is as follows: When the device is idle, all the aforementioned driving components, which refer to power elements, electrical components, and compatible power supplies, are connected via wires. The electrical connections between the electrical components are completed in sequence. The detailed connection methods are well-known in the art. The following mainly describes the working principle and process, without explaining the electrical control. During operation, the two large plastic plates to be welded are placed on the two movable welding tables I11 and II12 on both sides, respectively. The hydraulic cylinder 14 is activated to extend, and then, under the connection of the hydraulic rod 24, the telescopic rod II25, and the telescopic rod I26, the movable welding tables are gradually driven. I11. The moving welding tables II12 approach each other, and simultaneously, the movement of the external side rack 27 and the internal side rack 28 drives the spur gear 29 to rotate. At this time, the main rotating shaft 30 is controlled to rotate. Then, in conjunction with the rotational connection of bevel gear I31, bevel gear II32, connecting rod 33, bevel gear III34, bevel gear IV35, and transmission belt I37, the lead screw 20 is driven to rotate. Then, the control nut 19 actuates the heating plate 16 to descend until the side wall of the plastic thick plate contacts and melts with both sides of the heating plate 16. At this time, the hydraulic cylinder 14 stops. During this process, the bevel gear IX55, bevel gear VIII54, transmission belt II53, and bevel gear VII52... Under the transmission connection of bevel gear VI 51, bevel gear V 50, transmission belt III 56, transmission belt IV 57, and transmission shaft 58, the drive gears 47 on both sides are controlled to mesh and rotate with the incomplete toothed plate 48. The pressure positioning roller 43 at the bottom of the pressure fixing component lifting base plate 40 is controlled to contact the top of the plastic thick plate and roll and hold it in place. At this time, the plastic thick plates on both sides are stably heated. After the plates are heated and melted, the hydraulic cylinder 14 continues to extend. At this time, the drive gear 47 contacts the position on the top of the incomplete toothed plate 48 that does not contain tooth grooves. The drive gear 47 is in a rotating state, maintaining a continuous downward pressure on the incomplete toothed plate 48. Simultaneously, nut 19 opens and rises. When heating plate 16 separates from the side walls of the two plastic thick plates, the two side walls come into contact with each other and dock. During this process, pressure positioning roller 43 applies rolling pressure to the top of the plastic thick plate. After hydraulic cylinder 14 extends to its maximum distance, the two plastic thick plates are fully docked. Then, hydraulic cylinder 14 on both sides begins to retract, heating plate 16 continues to move upward, and pressure positioning roller 43 also rises synchronously. Then, moving welding table I 11 and moving welding table II 12 begin to separate. At this time, the two plastic thick plates are welded into one piece. With the positioning of suction cup 60, the plastic thick plate is output along moving welding table II 12.

[0047] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A large-scale plastic thick plate butt welding machine, characterized in that, Includes a base (10), and a set of welding devices is lifted and installed at the top center of the base (10). The welding devices include heating plate side brackets (17) fixed on both sides of the base (10), and a set of heating plates (16) is lifted and installed between the two heating plate side brackets (17). Two sets of movable welding tables I (11) and movable welding tables II (12) are relatively movable on the bases (10) on both sides of the lower part of the welding device. The adaptive fixing mechanism is provided with two sets respectively installed on both sides of the welding device, which are used for adaptive rolling pressing and positioning of the plastic plate. The main drive unit is located on one side of the top of the base (10) and is used to drive the relative movement of the mobile welding table I (11) and the mobile welding table II (12), the lifting and lowering of the welding device and the adaptive fixing mechanism. The main drive unit includes a power base (13) fixed to one side of the top of the base (10) by a support frame. The bottom of the power base (13) is equipped with a drive assembly and the top is equipped with a rotating assembly. The rotating assembly is rotatably connected to the drive assembly. Rotating connector I and rotating connector II are respectively provided between the drive assembly and the welding device and the adaptive fixing mechanism. When the drive assembly rotates, the rotating connector I drives the welding device to lift and lower, thereby controlling the heating plate (16) to heat and melt the side walls of the plastic thick plates on both sides. The rotating connector II drives the adaptive fixing mechanism on both sides to roll and press and position the plastic thick plates on the lower side. The drive assembly includes a hydraulic cylinder (14) fixedly installed on one side of the bottom center of the power base (13). The output end of the hydraulic cylinder (14) is connected to a hydraulic rod (24). A connecting plate II (22) and a connecting plate I (23) are fixedly installed on the bottom center of the mobile welding table I (11) and the mobile welding table II (12), respectively. The end of the hydraulic rod (24) is fixedly connected to the middle of the side wall of the connecting plate II (22). Two sets of power steering components are symmetrically arranged at the bottom of the power base (13) on both sides of the hydraulic cylinder (14). The power steering components extend toward the mobile welding table I (11) and the mobile welding table II (12). The power steering component includes two sets of telescopic rods II (25) and I (26) distributed parallel to the hydraulic rod (24). Telescopic rod positioning blocks (21) are installed at both ends of the power base (13) corresponding to telescopic rods II (25) and I (26). Telescopic rods II (25) and I (26) move through the telescopic rod positioning blocks (21). The end of telescopic rod I (26) facing the movable welding table II (12) moves through the movable welding table I (11) and is fixedly connected to the movable welding table. On the side wall of platform II (12), the end of telescopic rod II (25) facing the movable welding platform I (11) is fixed on the side wall of movable welding platform I (11). The telescopic rod II (25) and telescopic rod I (26) located between the two telescopic rod positioning base blocks (21) are respectively fixedly installed with an internal side rack (28) and an external side rack (27). A set of spur gears (29) meshes between the external side rack (27) and the internal side rack (28). The top of the spur gear (29) is rotatably set at the bottom of the power base (13). The rotating assembly includes a main rotating shaft (30) fixedly connected to the top of the spur gear (29). A bevel gear I (31) is installed at the top of the main rotating shaft (30). A bevel gear II (32) is vertically meshed on one side of the bevel gear I (31). A connecting rod (33) is connected to the side of the bevel gear II (32) facing the heating plate (16). A bevel gear III (34) is installed at the end of the connecting rod (33). A bevel gear IV (35) is vertically meshed on one side of the bevel gear III (34). The bottom of the bevel gear IV (35) is rotatably supported by a support shaft (36). The adaptive fixing mechanism includes multiple sets of pressure positioning rollers (43) arranged in parallel. Roller shafts are installed at both ends of the pressure positioning rollers (43). A set of triangular bushings (44) are fitted together between the roller shafts on the same side. A pressure fixing lifting base plate (40) is connected between the tops of the bushings (44) at both ends through a connecting column (42). A U-shaped bracket (39) is slidably connected to the outside of both sides of the pressure fixing lifting base plate (40). One side of the bottom end of the U-shaped bracket (39) is fixed on the base (10). A slide rail (46) is provided on the side wall of the U-shaped bracket (39) facing the pressure fixing lifting base plate (40). A slider (45) is installed on the side wall of the pressure fixing lifting base plate (40) corresponding to the slide rail (46). The slider (45) slides longitudinally along the slide rail (46). The lifting base plate (40) of the pressure fixing component is provided with a lifting assembly on the side facing the heating plate (16). The two lifting assemblies are rotatably connected, and the lifting assembly on the side closer to the power base (13) is rotatably connected to the rotating connector II. The rotating connector II includes a transmission belt II (53) rotatably connected to the connecting guide rod. The end of the transmission belt II (53) is connected to a gear shaft. A bevel gear VIII (54) is connected to one side of the gear shaft. A bevel gear IX (55) fixed on the support shaft (36) is vertically meshed on one side of the bevel gear VIII (54).

2. The large-scale plastic thick plate butt welding machine according to claim 1, characterized in that, The top of the mobile welding table II (12) is uniformly provided with multiple sets of suction cups (60).

3. A large-scale plastic thick plate butt welding machine according to claim 2, characterized in that, The heating plate (16) has slide bars installed at both ends, and a longitudinal groove is provided on the side wall of the heating plate side bracket (17) corresponding to the slide bar, and the slide bar moves along the longitudinal groove.

4. A large-scale plastic thick plate butt welding machine according to claim 3, characterized in that, The rotating connector I includes a fixed connecting rod (18) installed on the side of the heating plate (16) facing the power base (13). The top of the fixed connecting rod (18) is connected to a nut (19). The middle of the nut (19) is threaded with a vertical lead screw (20). The nut (19) is provided with a guide device for limiting its rotation. Guide rods are installed at both ends of the lead screw (20). The top guide rod is supported and positioned by an L-shaped support sleeve (38). The top guide rod is rotatably connected to the support shaft (36) on the corresponding side by a transmission belt I (37).

5. A large-scale plastic thick plate butt welding machine according to claim 4, characterized in that, The lifting assembly includes an incomplete toothed plate (48) installed on the side wall of the lifting base plate (40) of the pressure fixing component facing the heating plate (16). A drive gear (47) is engaged on one side of the incomplete toothed plate (48). Wheel rods are installed at both ends of the drive gear (47). A positioning rod is fitted on the wheel rod. The end of the positioning rod is fixed on the adjacent U-shaped bracket (39). The drive gears (47) on both sides are symmetrically distributed. A set of transmission shafts (58) is provided above the heating plate (16) between the drive gears (47) on both sides. The transmission shafts (58) and the wheel rods on the drive gears (47) on both sides are rotatably connected by transmission belts III (56) and IV (57) respectively. One end of the transmission shaft (58) is connected to a shaft (59). The bottom of the shaft (59) is fixed on the heating plate side bracket (17) by a bracket.

6. A large-scale plastic thick plate butt welding machine according to claim 5, characterized in that, A set of steering connectors is provided on the wheel rod of the drive gear (47) near the power base (13), and the steering connectors are rotatably connected to the rotating connector II; The steering connector includes two sets of parallel bevel gears V (50) and VII (52) mounted on the drive gear (47). A set of bevel gears VI (51) meshes between bevel gears V (50) and VII (52). A connecting guide rod is installed on the side of bevel gear VII (52) away from bevel gear V (50). The connecting guide rod is rotatably connected to the rotating connector II.

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