Roller screen welding equipment and method

Abstract

The invention relates to the field of screen welding, and discloses roller screen welding equipment and method.The welding equipment comprises a fixing mechanism used for fixing an inner barrel, the surface of the inner barrel is wrapped with a screen, a welding area is formed at the connecting position of the two ends of the screen, a supply mechanism comprises a workbench, and a heat conduction soft plate is located on the welding area; the heat-conducting soft plate is fit with the welding area due to the pressing mechanism; the pressing mechanism is fixedly mounted on the supply mechanism; the variable-speed driving mechanism is fixedly installed on the supply mechanism, a wheel type linear welding machine is arranged in the variable-speed driving mechanism, and when the welding speed of the wheel type linear welding machine is changed, the downward pulling force of the downward pressing mechanism on the welding area can be adjusted in a self-adaptive mode, and it is ensured that the welding speed is accurately matched with the pressing force of the heat conduction soft plate on the welding area; therefore, the problem of instant disengagement or untight contact of a welding area caused by factors such as mismatching of welding speed and pressure, uneven surface of the screen and welding vibration is effectively avoided, pseudo soldering and unsoldering are greatly reduced, and the welding quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of screen welding, and more specifically, it relates to a drum screen welding device and method. Background Art

[0002] In industrial production, drum screens, as key screening components, are widely used in many fields such as mining, construction, chemical industry, food processing, etc.; screens of different materials, such as stainless steel screens with good corrosion resistance and wire screens with cost advantages, have significant differences in welding characteristics; in addition, the screen specifications are rich, varying from the fineness of the mesh holes to the overall size, which makes the welding process extremely complex; for various screens, the suitable welding speed range is extremely crucial; for example, thinner materials or finer specifications of screens require a relatively slow and stable welding speed to ensure precise control of the heat input during the welding process and avoid problems such as burn-through or incomplete penetration; while for thicker materials or coarser specifications of screens, a higher welding speed is required to improve production efficiency while ensuring the strength and quality of the weld.

[0003] During the welding process, the downward pressure borne by the welding area is also crucial; a stable and appropriate downward pressure can ensure that the welded parts of the screen are closely fitted, promote the effective transfer of heat, and is conducive to forming high-quality welds; if the downward pressure is insufficient, gaps may appear in the welding area of the screen, resulting in defects such as false welding and de-welding; while if the downward pressure is too large, it may damage the screen, affecting its structural strength and service life; however, existing welding equipment cannot synchronously and reasonably adjust the downward pressure on the welding area when adjusting the welding speed; this is because different welding speeds mean changes in heat input and welding time, and correspondingly, the demand for downward pressure in the welding area should also change accordingly; but traditional equipment is difficult to achieve this dynamic adaptive adjustment, making it difficult to guarantee the welding quality. Therefore, we have designed a drum screen welding device and method. Summary of the Invention

[0004] The present invention provides a drum screen welding device and method to solve the technical problems in the related art that screens of different materials and specifications need to be adapted to the welding speed, and at the same time, the downward pressure in the welding area is crucial for the welding quality, and existing equipment cannot reasonably adjust the downward pressure along with the welding speed.

[0005] The present invention provides a drum screen welding device, including a fixing mechanism for fixing an inner cylinder, and a screen is wrapped on the surface of the inner cylinder, and a welding area is formed at the connection of both ends of the screen; a supply mechanism, which includes a workbench, and the workbench is fixedly connected to the fixing mechanism; a heat-conducting soft plate, which is located above the welding area and is connected to a pressing mechanism through a heat-conducting hard plate, and the heat-conducting soft plate is adapted to fit with the welding area due to the pressing mechanism; a downward pressing mechanism, which is fixedly installed on the supply mechanism and presses the heat-conducting soft plate against a partial welding area; a variable-speed driving mechanism, which is fixedly installed on the supply mechanism and includes a wheel-type linear welding machine. When the variable-speed driving mechanism changes the welding speed of the wheel-type linear welding machine, the downward pulling force of the downward pressing mechanism on the welding area can adaptively change accordingly.

[0006] As a further optimized solution of the present invention, the downward pressing mechanism includes a slide rail slidably connected to the workbench; a slider slidably installed inside the slide rail; a forward and reverse screw rod rotatably installed on the workbench and threadedly connected to the slide rail.

[0007] As a further optimized solution of the present invention, the downward pressing mechanism further includes an adjusting component fixedly connected to the slider; a first sliding tube fixedly installed on the adjusting component, and a second hollow plate is slidably installed inside it; a second sliding tube slidably installed inside the first sliding tube, and a first hollow plate is fixedly installed inside it. The two second sliding tubes are slidably connected to the pressing mechanism; a first spring, the two ends of which are respectively connected to the first hollow plate and the second hollow plate.

[0008] As a further optimized solution of the present invention, the downward pressing mechanism further includes an extrusion box; a third sliding tube fixedly installed on the extrusion box and slidably connected to the second sliding tube; an extrusion plate slidably installed on the extrusion box, and a second screw rod is rotatably installed at the top of it, and the second screw rod is threadedly connected to the extrusion box; a heat-conducting hard plate fixedly connected to the extrusion box, and the bottom end of it is fixedly connected to the heat-conducting soft plate, and a plurality of through holes are formed in the part located inside the extrusion box.

[0009] As a further optimized solution of the present invention, the downward pressing mechanism further includes a fixing frame fixedly connected to the workbench; a third screw rod rotatably installed on the fixing frame; a second threaded block slidably installed inside the fixing frame and threadedly connected to the third screw rod; a sliding box slidably installed on the fixing frame and fixedly connected to the second threaded block; a telescopic plate, the two ends of which are respectively fixedly connected to the sliding box and the extrusion box; an electric telescopic rod fixedly installed at the bottom of the sliding box, and the telescopic end of it is fixedly connected to the wheel-type linear welding machine.

[0010] As a further optimized solution of the present invention, a polishing layer is fixedly arranged at the bottom of the heat-conducting soft plate, and the two polishing layers respectively perform different polishing treatments on the welding areas of the screen.

[0011] As a further optimized solution of the present invention, a storage groove is provided inside the workbench; the supply mechanism further includes a water pump fixedly installed inside the storage groove; two telescopic hoses are fixedly installed on the workbench and are respectively communicated with the two first sliding tubes, and one of the telescopic hoses is communicated with the water pump.

[0012] As a further optimized solution of the present invention, the variable-speed drive mechanism includes a mounting cover fixedly connected to the workbench; a first rotating shaft rotatably installed on the mounting cover, on which a first conical pulley is fixedly installed; a second rotating shaft rotatably installed on the mounting cover, on which a second conical pulley is fixedly installed; a second drive belt for driving the first conical pulley and the second conical pulley; a motor fixedly installed on the mounting cover, the power output shaft of which is fixedly connected to the second rotating shaft; a drive frame slidably installed inside the mounting cover, on which a groove for the second drive belt to pass through is provided; a fourth screw rod rotatably installed on the mounting cover and threadedly connected to the drive frame; an extrusion frame slidably installed on the workbench and fixedly connected to the drive frame; two first belt pulleys respectively fixedly installed on the first rotating shaft and the third screw rod; a first drive belt for driving the two first belt pulleys.

[0013] As a further optimized solution of the present invention, the adjustment assembly includes a connection box fixedly connected to the slider and the first sliding tube; a first screw rod rotatably installed on the connection box, threadedly connected to the second hollow plate, on which a first gear is fixedly installed; a rack slidably installed on the connection box and meshed with the first gear.

[0014] A method for a drum screen welding device includes the following steps:

[0015] S1. Preparation work: Select the screen material according to requirements, such as stainless steel or wire mesh, prepare a metal inner cylinder to support the screen, wrap the screen flatly around the inner cylinder, initially fix it with a fixture or spot welding, and then place the inner cylinder on the fixing mechanism for fixation;

[0016] S2. Mechanism debugging: Rotate the forward and reverse screw rod to make the slide rail drive the pressing mechanism to approach the screen to adapt to the diameter. Move the first sliding tube and the second sliding tube through the adjustment assembly to make the heat-conducting soft plate higher than the top of the screen, and then move the slider to make the heat-conducting soft plate above the screen;

[0017] S3. Welding preparation: Release the second sliding tube, use the first spring to make the heat-conducting soft plate move down to press the welding area of the screen, rotate the second screw rod to drive the pressing plate to press the heat-conducting soft plate to make it completely fit the screen, and control the electric telescopic rod to make the wheel-type linear welding machine move down to contact the welding area;

[0018] S4. Welding operation: Start the motor, drive the wheeled linear welding machine together with the heat-conducting flexible board to move through the variable-speed drive mechanism, achieve local stable pressing welding. Rotate the fourth screw rod to change the welding speed, and at the same time, the rack is extruded to adjust the downward pressure of the heat-conducting flexible board.

[0019] S5. Cooling treatment: Start the water pump to make the coolant circulate in the telescopic hose, the first sliding pipe and the second sliding pipe, pre-cool the screen before welding, absorb heat during welding, and cool the weld seam after welding.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. For the drum screen welding equipment and method described in the present invention, when changing the welding speed of the wheeled linear welding machine, the downward pulling force of the pressing mechanism on the welding area can be self-adaptively adjusted to ensure the accurate matching of the welding speed and the pressing force of the heat-conducting flexible board on the welding area; this effectively avoids problems such as the instantaneous detachment or loose contact of the welding area caused by the mismatch between the welding speed and pressure, the uneven surface of the screen, and welding vibration, greatly reducing false soldering and de-soldering and improving the welding quality.

[0022] 2. For the drum screen welding equipment and method described in the present invention, by rotating the positive and negative screw rods, the slide rail can drive the pressing mechanism to approach or move away from the screen to adapt to screens of different diameters; at the same time, the adjusting component can finely adjust the position of the heat-conducting flexible board to make it better fit the welding areas of various screens; this multi-dimensional adjustment function enables the equipment to adapt to the welding requirements of different materials and specifications of screens, greatly improving the versatility and application range of the equipment.

[0023] 3. For the drum screen welding equipment and method described in the present invention, before welding, the circulating coolant pre-cools the screen to reduce the screen temperature, enhance its structural stability, and reduce the deformation of the screen caused by temperature changes during welding; during welding, the coolant can absorb heat to prevent the temperature of the grinding area from being too high and ensure the stability of the welding process; after welding, the cooling system can quickly cool the weld seam, promote the rapid solidification of the weld seam metal, reduce the generation of welding stress, and avoid defects such as cracks in the weld seam caused by stress concentration, effectively ensuring the performance and service life of the screen. Description of the Drawings

[0024] Figure 1 is the overall structural schematic diagram of the present invention;

[0025] Figure 2 is Figure 1 the enlarged view at A in

[0026] Figure 3 is the connection schematic diagram of the slide rail and the positive and negative screw rods of the present invention;

[0027] Figure 4 It is a schematic diagram of the internal structure of the first sliding tube and the second sliding tube of the present invention;

[0028] Figure 5 is Figure 4 the enlarged view at position B in

[0029] Figure 6 It is a schematic diagram of the internal structure of the installation box of the present invention;

[0030] Figure 7 It is a schematic diagram of the internal structure of the workbench of the present invention;

[0031] Figure 8 It is a schematic diagram of the connection between the sliding box and the fixed frame of the present invention;

[0032] Figure 9 It is a schematic diagram of the internal structure of the installation cover of the present invention;

[0033] Figure 10 is Figure 9 the enlarged view at position C in

[0034] Figure 11 is Figure 9 the enlarged view at position D in

[0035] Figure 12 It is a schematic diagram of the structure of the extrusion frame of the present invention;

[0036] Figure 13 It is a flow chart of the welding method of the present invention.

[0037] In the figure: 1, inner cylinder; 2, sieve mesh; 3, fixing mechanism; 401, workbench; 402, telescopic hose; 403, storage tank; 404, water pump; 501, slide rail; 502, positive and negative screw rod; 503, slider; 601, first sliding tube; 602, sliding box; 603, telescopic plate; 604, electric telescopic rod; 605, wheel type linear welding machine; 606, extrusion box; 607, second sliding tube; 608, first hollow plate; 609, first spring; 610, second hollow plate; 611, first screw rod; 612, connection box; 613, first rack; 614, first gear; 615, third sliding tube; 616, extrusion plate; 617, heat-conducting soft plate; 618, heat-conducting hard plate; 619, polishing layer; 620, second screw rod; 701, fixed frame; 702, second threaded block; 703, third screw rod; 801, installation cover; 802, first pulley; 803, first drive belt; 804, first cone pulley; 805, first rotating shaft; 806, second drive belt; 807, motor; 808, second rotating shaft; 809, extrusion frame; 810, second cone pulley; 811, fourth screw rod; 812, drive frame. Detailed implementation manners

[0038] Reference will now be made to example embodiments to discuss the subject matter described herein. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thereby implement the subject matter described herein, and that changes may be made to the functions and arrangements of the elements discussed without departing from the scope of protection of the content of this specification. Each example may omit, substitute, or add various processes or components as needed. Additionally, the features described in some examples may be combined in other examples.

[0039] As Figures 1 to 12 shown, a drum screen welding device according to an embodiment of the present invention includes a fixing mechanism 3 for fixing an inner cylinder 1, and a screen 2 is wrapped around the surface of the inner cylinder 1, and a welding area is formed at the connection of both ends of the screen 2; a supply mechanism, which includes a workbench 401, and the workbench 401 is fixedly connected to the fixing mechanism 3; a heat-conducting soft plate 617 is located above the welding area and is connected to a pressing mechanism through a heat-conducting hard plate 618, and the heat-conducting soft plate 617 is adaptively fitted to the welding area due to the pressing mechanism; a pressing-down mechanism is fixedly installed on the supply mechanism and presses down the heat-conducting soft plate 617 on a partial welding area; a variable-speed driving mechanism is fixedly installed on the supply mechanism, and includes a wheel-type linear welding machine 605 therein. When the variable-speed driving mechanism changes the welding speed of the wheel-type linear welding machine 605, the downward pulling force of the pressing-down mechanism on the welding area can be adaptively changed accordingly.

[0040] Specifically, first, according to the usage requirements, select a suitable material for the screen 2, such as a stainless-steel screen 2, a wire screen 2, etc.; then prepare an inner cylinder 1 for support, which is usually made of metal and serves to support the screen 2 to ensure the shape and strength of the drum; wrap the screen 2 flatly on the outside of the support cylinder, ensuring that the screen 2 is in close contact with the support cylinder without wrinkles or looseness; the screen 2 can be preliminarily fixed to the inner cylinder 1 by using a fixture or spot welding.

[0041] Subsequently, place the interior on the fixing mechanism 3 and use the fixing mechanism 3 to fix the inner cylinder 1. After the inner cylinder 1 is fixed, move the heat-conducting soft plate 617 to the welding position of the screen 2, and through the pressing mechanism, the heat-conducting soft plate 617 is closely fitted to the welding area of the screen 2, and then use the downward pulling force of the pressing-down mechanism to pull down, so that the local position of the welding area can be well and closely fitted, and the wheel-type linear welding machine 605 is located between the two heat-conducting soft plates 617, which is more convenient for the wheel-type linear welding machine 605 to weld the screen 2.

[0042] When encountering different screens 2, the required welding speed is different. The moving welding speed of the wheeled linear welding machine 605 can be changed through a variable speed drive mechanism. At the same time, the downward pulling force of the pressing mechanism on the heat-conducting flexible board 617 will also be changed. In this way, the welding speed can be matched with the pressing force of the heat-conducting flexible board 617 on the welding area, avoiding factors such as unevenness on the surface of the screen 2 and vibration during the welding process, which may cause the heat-conducting flexible board 617 to be instantaneously separated from or in poor contact with the welding connection line.

[0043] Please refer to Figure 1 , the fixing mechanism 3 includes a mounting table, which is fixedly installed on the workbench 401. A movable block that can be manually or electrically controlled to move is arranged on the mounting table. A driving motor is arranged on the movable block, and a detachable positioning disk is arranged on the power output shaft of the driving motor. According to the size of the inner cylinder 1, positioning disks of different sizes are selected. In this way, the positioning disk can be used to connect with the inner cylinder 1, and the driving motor drives the inner cylinder 1 to rotate, facilitating welding at different positions of the screen 2; and being movable is to widen the installation spacing and facilitate the placement of inner cylinders 1 of different lengths.

[0044] Please refer to Figure 3 , the pressing mechanism includes a slide rail 501 slidably connected to the workbench 401; a slider 503 is slidably installed inside the slide rail 501; a positive and negative screw rod 502 is rotatably installed on the workbench 401 and is threadedly connected to the slide rail 501.

[0045] By rotating the positive and negative screw rod 502, the positive and negative screw rod 502 will cause the two slide rails 501 to approach or move away from each other. In this way, the two slide rails 501 will drive the remaining structures on the pressing mechanism to approach the screen 2, so as to adapt to the diameter of the screen 2. In this way, different screens 2 can be used, and arc-shaped support plates can be fixedly installed on the structures of these approaching screens 2. In this way, the arc-shaped support plates can support the side of the screen 2, making the inner cylinder 1 and the screen 2 more stable.

[0046] Please refer to Figure 2 and Figure 4 , the pressing mechanism further includes an adjustment component fixedly connected to the slider 503; a first sliding tube 601 is fixedly installed on the adjustment component, and a second hollow plate 610 is slidably installed inside it; a second sliding tube 607 is slidably installed inside the first sliding tube 601, and a first hollow plate 608 is fixedly installed inside it. The two second sliding tubes 607 are slidably connected to the pressing mechanism; both ends of a first spring 609 are connected to the first hollow plate 608 and the second hollow plate 610 respectively.

[0047] After the first sliding tube 601 and the second sliding tube 607 are controlled by the slide rail 501 to approach the screen 2, the second sliding tube 607 is pulled to make the heat-conducting flexible plate 617 higher than the top of the screen 2. Then, the slider 503 is moved to place the heat-conducting flexible plate 617 above the screen 2. After releasing the second sliding tube 607 in this way, the first spring 609 can move the second sliding tube 607 downward, so that the heat-conducting flexible plate 617 moves downward to the welding area of the screen 2, presses the welding area of the screen 2, and the wheel-type linear welding machine 605 is located between the two heat-conducting flexible plates 617. In this way, the two heat-conducting flexible plates 617 can effectively press the welding area of the wheel-type linear welding machine 605 tightly to ensure the stability of welding.

[0048] Please refer to Figure 6 , the pressing mechanism further includes an extrusion box 606; the third sliding tube 615 is fixedly installed on the extrusion box 606 and is slidably connected to the second sliding tube 607; the extrusion plate 616 is slidably installed on the extrusion box 606, and a second screw rod 620 is rotatably installed on the top thereof. The second screw rod 620 is threadedly connected to the extrusion box 606; the heat-conducting hard plate 618 is fixedly connected to the extrusion box 606, and its bottom end is fixedly connected to the heat-conducting flexible plate 617. A plurality of through holes are formed through the part located inside the extrusion box 606.

[0049] When the heat-conducting flexible plate 617 presses down on the welding area of the screen 2, the second screw rod 620 is rotated. The second screw rod 620 will drive the extrusion plate 616 to move downward. The downward movement of the extrusion plate 616 will squeeze the heat-conducting flexible plate 617, making the heat-conducting flexible plate 617 fully fit the screen 2. In this way, a more comprehensive downward pressure can be provided for the local welding area on the screen 2, further improving the welding effect.

[0050] Please refer to Figure 8 , the pressing mechanism further includes a fixing frame 701 fixedly connected to the workbench 401; the third screw rod 703 is rotatably installed on the fixing frame 701; the second threaded block 702 is slidably installed inside the fixing frame 701 and is threadedly connected to the third screw rod 703; the sliding box 602 is slidably installed on the fixing frame 701 and is fixedly connected to the second threaded block 702; the telescopic plate 603 is fixedly connected to the sliding box 602 and the extrusion box 606 at both ends respectively; the electric telescopic rod 604 is fixedly installed at the bottom of the sliding box 602, and its telescopic end is fixedly connected to the wheel-type linear welding machine 605.

[0051] After the above operations are completed, control the electric telescopic rod 604 to lower the wheeled linear welding machine 605, so that the wheeled linear welding machine 605 will contact the welding area of the screen 2, thereby welding the welding area. Start the variable speed drive mechanism, and the variable speed drive mechanism drives the third screw 703 to rotate. The third screw 703 will move the second threaded block 702, and the second threaded block 702 drives the sliding box 602 to move. The sliding box 602 drives the wheeled linear welding machine 605 to move. Due to the action of the telescopic plate 603, the heat-conducting flexible plate 617 will also move together. In this way, the heat-conducting flexible plate 617 can always divide the entire welding area on the screen 2 into local welding areas, perform local downward pressure, and keep the wheeled linear welding machine 605 at the local downward pressure position for welding, so that the wheeled linear welding machine 605 can always weld stably.

[0052] Please refer to Figure 6 , a polishing layer 619 is fixedly arranged at the bottom of the heat-conducting flexible plate 617, and the two polishing layers 619 perform different polishing treatments on the welding area of the screen 2 respectively.

[0053] Since the polishing layer 619 is arranged at the bottom of the heat-conducting flexible plate 617, and the two polishing layers 619 are located on both sides of the wheeled linear welding machine 605, when the wheeled linear welding machine 605 moves for welding, it can first clean the place to be welded, improve the welding efficiency, and then perform preliminary polishing on the welded place to remove fine burrs.

[0054] Please refer to Figure 7 , a storage tank 403 is opened inside the workbench 401; the supply mechanism further includes a water pump 404 fixedly installed inside the storage tank 403; the two telescopic hoses 402 are both fixedly installed on the workbench 401 and are respectively communicated with the two first sliding pipes 601, and one of the telescopic hoses 402 is communicated with the water pump 404.

[0055] When the heat-conducting flexible board 617 is pressed against the welding area of the screen mesh 2, the water pump 404 can be started. The water pump 404 can transport the coolant through the telescopic hose 402 into the first sliding tube 601. The coolant entering the first sliding tube 601 will enter the second sliding tube 607 and return to the inside of the storage tank 403 from the other first sliding tube 601 and second sliding tube 607 of the installation box, thus forming a circulating flow of the coolant. Since the coolant acts on the heat-conducting hard board 618 and the heat-conducting flexible board 617 at the installation box, the screen mesh 2 can be pre-cooled by the circulating coolant before welding, which can reduce the temperature of the screen mesh 2. The low temperature makes the structure of the screen mesh 2 more stable. During the subsequent welding process, the deformation of the screen mesh 2 caused by temperature changes can be reduced. A large amount of heat is generated during the welding process. Although the circulating water source cannot act directly, it can also absorb the heat generated by welding and take away the heat to avoid the temperature of the grinding area being too high. After welding, the welded part is cooled, which can quickly cool down the weld seam, promote the rapid solidification of the weld seam metal, reduce the generation of welding stress, and avoid defects such as cracks in the weld seam caused by stress concentration. And during the whole process, the heat generated by grinding will also be transferred away by the heat-conducting flexible board 617, playing a role in further cooling and avoiding problems such as defects in the welding area caused by too high temperature.

[0056] Please refer to Figures 9 to 12 , the variable speed drive mechanism includes a mounting cover 801 fixedly connected to the workbench 401; a first rotating shaft 805 is rotatably mounted on the mounting cover 801, and a first cone pulley 804 is fixedly mounted thereon; a second rotating shaft 808 is rotatably mounted on the mounting cover 801, and a second cone pulley 810 is fixedly mounted thereon; a second drive belt 806 is used for driving the first cone pulley 804 and the second cone pulley 810; a motor 807 is fixedly mounted on the mounting cover 801, and its power output shaft is fixedly connected to the second rotating shaft 808; a drive frame 812 is slidably mounted inside the mounting cover 801, and a groove for the second drive belt 806 to pass through is formed thereon; a fourth screw 811 is rotatably mounted on the mounting cover 801 and is threadedly connected to the drive frame 812; an extrusion frame 809 is slidably mounted on the workbench 401 and is fixedly connected to the drive frame 812; two first belt pulleys 802 are respectively fixedly mounted on the first rotating shaft 805 and the third screw 703; a first drive belt 803 is used for driving the two first belt pulleys 802.

[0057] Start the motor 807. The motor 807 can drive the second rotating shaft 808 to rotate. The second rotating shaft 808 drives the second cone pulley 810 to rotate. The second cone pulley 810 drives the first cone pulley 804 to rotate through the second drive belt 806. The first cone pulley 804 drives the first rotating shaft 805 to rotate. The first rotating shaft 805 drives the third screw 703 to rotate through the first belt pulley 802 and the first drive belt 803. In this way, the wheel-type linear welding machine 605 and the heat-conducting flexible board 617 can be moved together, so as to achieve local stable pressing welding.

[0058] By rotating the third screw rod 703, the third screw rod 703 drives the driving frame 812 to move. The movement of the driving frame 812 drives the second driving belt 806 to move. The second driving belt 806 moves on the first cone pulley 804 and the second cone pulley 810, which will change the rotation speed of the first cone pulley 804 and the second cone pulley 810, thereby changing the speed of the wheeled linear welding machine 605 and making its welding speed adapt to the welding of different screens 2.

[0059] Please refer to Figure 5 , the adjusting assembly includes a connection box 612 fixedly connected to the slider 503 and the first sliding tube 601; the first screw rod 611 is rotatably installed on the connection box 612, threadedly connected to the second hollow plate 610, and a first gear 614 is fixedly installed thereon; the rack 613 is slidably installed on the connection box 612 and meshes with the first gear 614.

[0060] When the third screw rod 703 rotates to change the transmission ratio between the first cone pulley 804 and the second cone pulley 810 and gradually accelerates it, the driving frame 812 will also drive the extrusion frame 809 to move. After the speed change is completed, the motor 807 can be first controlled to drive close to the extrusion frame 809, and the rack 613 will squeeze the extrusion frame 809, thereby moving to drive the first gear 614 to rotate. The first gear 614 rotates the third screw rod 703, and the third screw rod 703 moves the second hollow plate 610 downward, which will pull the first spring 609. Since the second hollow plate 610 is positioned by the third screw rod 703, only the second sliding tube 607 can be pulled more downward, so that the heat-conducting soft plate 617 can have a greater downward pressure on the welding area of the screen 2. In this way, the welding speed of the wheeled linear welding machine 605 will match the downward pressure of the heat-conducting soft plate 617, and it can avoid the situation that when the moving speed of the wheeled linear welding machine 605 becomes faster, the downward pulling force received by the heat-conducting soft plate 617 does not increase, resulting in an instantaneous detachment or loose contact between the heat-conducting soft plate 617 and the welding area of the screen 2. When re-adjusting the speed, if it is to decelerate, first restore the rack 613 to its original position and operate again. If it is to continue accelerating, then the rack 613 can be further squeezed on the original basis.

[0061] Please refer to Figure 13 , a method for a drum screen welding device, including the following steps:

[0062] S1. Preparation work: Select the material of the screen 2 according to requirements, such as stainless steel or wire screen 2. Prepare the metal inner cylinder 1 to support the screen 2, wrap the screen 2 flatly around the inner cylinder 1, and initially fix it with a fixture or spot welding. Then place the inner cylinder 1 on the fixing mechanism 3 for fixing;

[0063] S2. Mechanism debugging: Rotate the positive and reverse screw rod 502 to drive the slide rail 501 to drive the downward pressing mechanism to approach the screen 2 to adapt to the diameter. Move the first sliding tube 601 and the second sliding tube 607 through the adjustment component to make the heat-conducting flexible plate 617 higher than the top of the screen 2, and then move the slider 503 to make the heat-conducting flexible plate 617 above the screen 2;

[0064] S3. Welding preparation: Release the second sliding tube 607, use the first spring 609 to move the heat-conducting flexible plate 617 downward to press the welding area of the screen 2, rotate the second screw rod 620 to drive the pressing plate 616 to press the heat-conducting flexible plate 617 to make it fully fit the screen 2, and control the electric telescopic rod 604 to move the wheel-type linear welding machine 605 downward to contact the welding area;

[0065] S4. Welding operation: Start the motor 807, drive the wheel-type linear welding machine 605 together with the heat-conducting flexible plate 617 to move through the speed change drive mechanism to achieve local stable pressing welding. Rotate the fourth screw rod 811 to change the welding speed, and at the same time, the rack 613 is pressed to adjust the downward pressure of the heat-conducting flexible plate 617;

[0066] S5. Cooling treatment: Start the water pump 404 to make the coolant circulate in the telescopic hose 402, the first sliding tube 601 and the second sliding tube 607, pre-cool the screen 2 before welding, absorb heat during welding, and cool the weld after welding.

[0067] Working principle: Wrap it flat on the outside of the metal inner cylinder 1 and initially fix it by means of a fixture or spot welding; Place the inner cylinder 1 on the mounting table of the fixing mechanism 3, select a suitable positioning disk according to the size of the inner cylinder 1 and install it on the output shaft of the driving motor 807. The driving motor 807 is installed on the movable moving block, and the installation distance is adjusted through the moving block to adapt to different lengths of the inner cylinder 1. The fixing mechanism 3 is installed on the workbench 401 to complete the preparation work before equipment welding.

[0068] Rotate the positive and reverse screw rod 502, which drives the two slide rails 501 threaded with it to approach or move away from each other on the workbench 401, driving the slider 503 in the slide rail 501 and other structures of the downward pressing mechanism to approach the screen 2 to adapt to different diameters of the screen 2; The slider 503 drives the adjustment component to approach the screen 2, and the second sliding tube 607 in the first sliding tube 601 on the adjustment component is pulled up, making the heat-conducting flexible plate 617 higher than the top of the screen 2. After moving the slider 503 to make the heat-conducting flexible plate 617 above the screen 2 and releasing it, the first spring 609 drives the second sliding tube 607 to move downward, driving the heat-conducting flexible plate 617 to press the welding area of the screen 2; Rotate the second screw rod 620 on the extrusion box 606 to drive the pressing plate 616 to move downward to press the heat-conducting flexible plate 617 to make it fit the screen 2 more tightly.

[0069] The fixing frame 701 is fixed to the workbench 401. Rotate the third screw rod 703 to drive the second threaded block 702 threadedly connected thereto to move within the fixing frame 701, driving the sliding box 602 to move. The sliding box 602 drives the extrusion box 606 and the heat-conducting soft plate 617 to move through the telescopic plate 603. At the same time, the electric telescopic rod 604 extends to lower the wheel-type linear welding machine 605 to contact the welding area of the screen 2 for welding. Start the water pump 404 in the storage tank 403 of the workbench 401 to pump the coolant into the first sliding tube 601 through the telescopic hose 402. The coolant circulates in the first and second sliding tubes 607 to pre-cool the screen 2 and absorb the heat generated by welding and grinding, reducing the temperature of the screen 2, reducing deformation and welding stress.

[0070] Start the motor 807, and its output shaft drives the second rotating shaft 808 to rotate. The second cone pulley 810 on the second rotating shaft 808 drives the first cone pulley 804 to rotate through the second drive belt 806, thereby causing the first rotating shaft 805 to rotate. The first pulley 802 on the first rotating shaft 805 and the third screw rod 703 are driven by the first drive belt 803, causing the third screw rod 703 to rotate, driving the wheel-type linear welding machine 605 and the heat-conducting soft plate 617 to move together for welding. Rotate the fourth screw rod 811 to drive the driving frame 812 threadedly connected thereto to move within the mounting cover 801, driving the second drive belt 806 to move on the first cone pulley 804 and the second cone pulley 810, changing the rotation speed of the two, thereby adjusting the welding speed of the wheel-type linear welding machine 605.

[0071] When the third screw rod 703 rotates to change the speed of the wheel-type linear welding machine 605, the driving frame 812 drives the extrusion frame 809 to move, and the motor 807 drives closer to the extrusion frame 809. The extrusion frame 809 extrudes the rack 613, and the rack 613 drives the first gear 614 meshing therewith to rotate. The first gear 614 drives the first screw rod 611 to rotate, causing the second hollow plate 610 to move downward, pulling the first spring 609, and further pulling the second sliding tube 607 downward to pull the heat-conducting soft plate 617 more, increasing the downward pressure on the welding area of the screen 2, making the welding speed match the downward pressure. When re-adjusting the speed, if the speed is decreased, the rack 613 returns to its original position and operates again. If continuing to accelerate, the rack 613 is further extruded on the original basis.

[0072] The embodiments of the present invention have been described above, but the embodiments are not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of this embodiment, those of ordinary skill in the art can also make many forms, all of which fall within the protection scope of this embodiment.

Claims

1. A drum screen welding device, including a fixing mechanism (3) for fixing the inner cylinder (1), and a screen (2) is wrapped on the surface of the inner cylinder (1). The connection parts at both ends of the screen (2) form a welding area, and it is characterized in that: A supply mechanism, which includes a workbench (401), and the workbench (401) is fixedly connected to the fixing mechanism (3); A heat-conducting soft plate (617), located above the welding area, and is connected to the pressing mechanism through a heat-conducting hard plate (618), and the heat-conducting soft plate (617) is adapted to fit the welding area due to the pressing mechanism; A downward pressing mechanism, fixedly installed on the supply mechanism, and presses the heat-conducting soft plate (617) downward on a partial welding area; A variable-speed driving mechanism, fixedly installed on the supply mechanism, which includes a wheel-type linear welding machine (605) inside. When the variable-speed driving mechanism changes the welding speed of the wheel-type linear welding machine (605), the downward pulling force of the downward pressing mechanism on the welding area can adaptively change accordingly.

2. The drum screen welding equipment according to claim 1, characterized in that: The downward pressing mechanism includes a slide rail (501) slidably connected to the workbench (401); A slider (503), slidably installed inside the slide rail (501); A forward and reverse screw rod (502), rotatably installed on the workbench (401), and is threadedly connected to the slide rail (501).

3. A drum screen welding device according to claim 2, characterized in that: The downward pressing mechanism further includes an adjusting component fixedly connected to the slider (503); A first sliding tube (601), fixedly installed on the adjusting component, and a second hollow plate (610) is slidably installed inside it; A second sliding tube (607), slidably installed inside the first sliding tube (601), and a first hollow plate (608) is fixedly installed inside it. The two second sliding tubes (607) are slidably connected to the pressing mechanism; A first spring (609), with both ends respectively connected to the first hollow plate (608) and the second hollow plate (610).

4. A drum screen welding device according to claim 3, characterized in that: The downward pressing mechanism further includes an extrusion box (606); A third sliding tube (615), fixedly installed on the extrusion box (606), and is slidably connected to the second sliding tube (607); An extrusion plate (616), slidably installed on the extrusion box (606), and a second screw rod (620) is rotatably installed on its top, and the second screw rod (620) is threadedly connected to the extrusion box (606); A heat-conducting hard plate (618), fixedly connected to the extrusion box (606), and its bottom end is fixedly connected to the heat-conducting soft plate (617). A plurality of through holes are formed through the part located inside the extrusion box (606).

5. A drum screen welding device according to claim 4, characterized in that: The downward pressing mechanism further includes a fixing frame (701) fixedly connected to the workbench (401); A third screw rod (703), rotatably installed on the fixing frame (701); A second threaded block (702), slidably installed inside the fixing frame (701), and is threadedly connected to the third screw rod (703); A sliding box (602), slidably installed on the fixing frame (701), and is fixedly connected to the second threaded block (702); An expansion plate (603), with both ends respectively fixedly connected to the sliding box (602) and the extrusion box (606); The electric telescopic rod (604) is fixedly installed at the bottom of the sliding box (602), and its telescopic end is fixedly connected to the wheeled linear welding machine (605).

6. The drum screen welding device according to claim 1, wherein: A polishing layer (619) is fixedly arranged at the bottom of the heat-conducting flexible plate (617), and the two polishing layers (619) respectively perform different polishing treatments on the welding areas of the sieve mesh (2).

7. A drum screen welding device according to claim 3, characterized in that: A storage groove (403) is provided inside the workbench (401); The supply mechanism further includes a water pump (404) fixedly installed inside the storage groove (403); Two telescopic hoses (402) are both fixedly installed on the workbench (401) and are respectively communicated with the two first sliding tubes (601), and one of the telescopic hoses (402) is communicated with the water pump (404).

8. A drum screen welding device according to claim 5, characterized in that: The variable-speed drive mechanism includes a mounting cover (801) fixedly connected to the workbench (401); A first rotating shaft (805) is rotatably installed on the mounting cover (801), and a first cone pulley (804) is fixedly installed thereon; A second rotating shaft (808) is rotatably installed on the mounting cover (801), and a second cone pulley (810) is fixedly installed thereon; A second drive belt (806) is used for driving the first cone pulley (804) and the second cone pulley (810); A motor (807) is fixedly installed on the mounting cover (801), and its power output shaft is fixedly connected to the second rotating shaft (808); A drive frame (812) is slidably installed inside the mounting cover (801), and a groove for the second drive belt (806) to pass through is provided thereon; A fourth screw rod (811) is rotatably installed on the mounting cover (801) and is threadedly connected to the drive frame (812); An extrusion frame (809) is slidably installed on the workbench (401) and is fixedly connected to the drive frame (812); Two first belt pulleys (802) are respectively fixedly installed on the first rotating shaft (805) and the third screw rod (703); A first drive belt (803) is used for driving the two first belt pulleys (802).

9. The drum screen welding device according to claim 3, characterized in that: The adjustment assembly includes a connection box (612) fixedly connected to the slider (503) and the first sliding tube (601); A first screw rod (611) is rotatably installed on the connection box (612), is threadedly connected to the second hollow plate (610), and a first gear (614) is fixedly installed thereon; A rack (613) is slidably installed on the connection box (612) and is engaged with the first gear (614).

10. A method for a drum screen welding device according to any one of claims 1-9, characterized in that: It includes the following steps: S1. Preparation work: Select the material of the sieve mesh (2) according to requirements, such as stainless steel or wire sieve mesh (2), prepare the metal inner cylinder (1) to support the sieve mesh (2), wrap the sieve mesh (2) flatly around the inner cylinder (1), preliminarily fix it with a fixture or spot welding, and then place the inner cylinder (1) on the fixing mechanism (3) for fixing; S2. Mechanism debugging: Rotate the positive and negative screw rod (502) to drive the sliding rail (501) to bring the downward pressing mechanism closer to the screen (2) to adapt to the diameter. Move the first sliding tube (601) and the second sliding tube (607) through the adjustment component to make the heat-conducting flexible plate (617) higher than the top of the screen (2), and then move the slider (503) to make the heat-conducting flexible plate (617) above the screen (2). S3. Welding preparation: Release the second sliding tube (607), use the first spring (609) to move the heat-conducting flexible plate (617) downward to press the welding area of the screen (2). Rotate the second screw rod (620) to drive the pressing plate (616) to press the heat-conducting flexible plate (617) to make it fully fit the screen (2), and control the electric telescopic rod (604) to move the wheel-type linear welding machine (605) downward to contact the welding area. S4. Welding operation: Start the motor (807), drive the wheel-type linear welding machine (605) together with the heat-conducting flexible plate (617) to move through the variable-speed drive mechanism to achieve local stable pressing welding. Rotate the fourth screw rod (811) to change the welding speed, and at the same time, the rack (613) is pressed to adjust the downward pressure of the heat-conducting flexible plate (617). S5. Cooling treatment: Start the water pump (404) to make the coolant circulate in the telescopic hose (402), the first sliding tube (601) and the second sliding tube (607), pre-cool the screen (2) before welding, absorb heat during welding, and cool the weld after welding.

Images