Filter assembly welding apparatus

Abstract

The present application relates to the technical field of metal welding, in particular to a filter accessory welding equipment, which comprises an inner mold roller, a lower mold, a side mold, a feeding assembly, a guiding unit and a maintaining assembly. In the present application, the elastic strip and the positioning column in the contact guiding unit jointly form a four-point positioning guiding frame for the metal mesh, and the positioning reference is determined by the determined reference when the material is clamped. During the closing process of the lower mold, the cooperation between the maintaining part one and the elastic strip maintains the limiting guiding of the metal mesh. During the closing process of the side mold, the cooperation between the maintaining part two and the elastic strip maintains the limiting guiding of the metal mesh. In summary, the four-point positioning guiding is maintained during the process of metal mesh blanking to completed welding, so that the quality problem of the final filter core skeleton with misaligned edges caused by the deviation of the metal mesh during the closing process is avoided.

Description

Technical Field

[0001] This invention relates to the field of metal welding technology, specifically to a welding equipment for filter accessories. Background Technology

[0002] Filters are core components that purify fluids, gases, or liquids through physical interception, adsorption, and separation, thereby protecting equipment and ensuring stable system operation. Common filters include oil filters, air filters, fuel filters, and air conditioning filters. The filter element frames in many filters are made of metal and are manufactured using welding processes.

[0003] The current processing steps for filter element frames involve rolling the metal mesh into a circle, stacking the two sides of the metal mesh to form a connection, and then welding the connection to obtain the finished filter element frame. Currently, resistance seam welding (roll welding) is often used for welding. The specific operation steps are as follows: First, the metal mesh is rolled into a cylindrical shape using a pre-set mold, and the connection of the metal mesh is located between the rotating roller electrode and the roll welding copper pad. Then, the rotating roller electrode presses down on the connection and moves along the axis of the formed cylinder to perform welding. In addition, during the above rolling process, a mold closing method is usually used, in which a lower mold and two side molds are successively brought closer to the central fixed mold, so that the metal mesh located in it is gradually rolled into a circle.

[0004] In the current metal mesh rolling process, an external feeding device places the metal mesh between a lower mold and a fixed mold. First, the lower mold closes to complete the winding of the middle section of the metal mesh. Then, the side molds close to complete the winding of the two side sections of the metal mesh. (See [reference needed]). Figure 10 After the metal mesh is cut, it is usually pressed into a fixed mold by an upward-moving pressure roller to limit the metal mesh.

[0005] Therefore, the current welding process has the following problems: Since the welding process of the filter element frame is usually an assembly line operation, the clamping and limiting effect of the clamping roller is easily reduced due to wear caused by long-term operation. In addition, there is no other limiting for the metal mesh after the material is unloaded. Therefore, when the lower mold is closed, the above-mentioned clamping and limiting method alone is prone to the problem of the metal mesh deviating due to friction between the lower mold and the metal mesh. In the process of closing the side mold, the two sides of the metal mesh are far from the clamping and limiting area, and the mold closing quality is affected by the position of the metal mesh during the mold closing process of the lower mold. This can easily lead to the problem of the metal mesh deviating due to friction between the upper mold and the metal mesh. In summary, the front and rear sides of the metal mesh are prone to deviate from the set position, resulting in misalignment of the filter element frame after welding, making the formed filter element frame unusable. Summary of the Invention

[0006] Therefore, it is necessary to provide a filter accessory welding equipment to solve the problems of the prior art.

[0007] This application provides a filter accessory welding equipment, including: a mounting frame, an inner mold roller fixedly mounted on the mounting frame, the diameter of the inner mold roller being the same as the diameter of the filter element skeleton, a lower mold mounted below the inner mold roller, side molds mounted on both the left and right sides of the inner mold roller, and roller electrodes mounted on the mounting frame.

[0008] The mounting frame is equipped with a feeding assembly, which includes two feeding clamps. The feeding clamps hold the metal mesh to be welded and move it between the inner mold roller and the lower mold.

[0009] The mounting frame is equipped with two positioning pins that are distributed front to back and slide vertically through the lower mold. The metal mesh is pressed against the inner mold roller by the upward movement of the positioning pins to form a primary guide.

[0010] The mounting frame is equipped with two sets of guide units distributed front and back. Each guide unit includes two elastic strips distributed left and right and located between the inner mold roller and the lower mold. The side of each elastic strip near the feeding clamp is equipped with a positioning block for holding the metal mesh.

[0011] Adjust the left and right positions of the positioning blocks so that the four positioning blocks together form a four-point positioning guide frame, forming a secondary guide.

[0012] The lower mold and the side mold are jointly provided with a support component for driving the elastic strip to maintain the positioning effect of the metal mesh during the mold closing process. The support component includes a support member one provided on the lower mold and a support member two provided on the upper mold.

[0013] According to an advantageous embodiment, the feeding assembly further includes electric push rods, and two electric push rods distributed on the left and right are provided on the mounting frame, with a movable seat fixedly provided on the front end face of the telescopic end of the electric push rod.

[0014] The feeding clamp includes two symmetrical clamping plates, which are slidably mounted on a movable base.

[0015] Two positioning posts are fixedly installed on the lower clamping plate, one in front and one behind. When the feeding clamp holds the metal mesh, the positioning posts one are engaged in the corresponding prism holes and maintain the straightness of the metal mesh.

[0016] According to an advantageous embodiment, the upper side of the lower mold is a concave semi-circle, and a receiving groove for avoiding the guide unit is provided on the lower mold. The two side molds are symmetrical from left to right. The right end face of the left side mold is an arc shape that fits with the inner mold roller, and an avoidance groove for avoiding the guide unit is provided on the side mold.

[0017] According to an advantageous embodiment, the axis of the positioning pile extends vertically, and the two positioning piles are moved up and down by hydraulic cylinders respectively, and the upper end face of the positioning pile is chamfered.

[0018] According to an advantageous embodiment, the guiding unit further includes a fixed seat, a fixed seat is fixedly installed on the lower side of the positioning pile through a connecting frame, a sliding block is slidably installed on the upper end of the fixed seat, and an L-shaped mounting block is slidably installed on the opposite sides of the two sliding blocks, and an elastic strip is fixedly installed on the horizontal section of the mounting block.

[0019] Two support arms, distributed front to back and used to support the elastic strip, are fixedly installed on the end face of the horizontal section of the mounting block away from the sliding block.

[0020] According to an advantageous embodiment, a second positioning post is fixedly provided on the upper end face of the positioning block.

[0021] The fixed base has a hollow structure. A gear with its axis extending back and forth is rotatably installed inside the fixed base via a rotating shaft. Two toothed plates, which are distributed vertically and mesh with the gear, are slidably installed inside the fixed base. The two toothed plates are fixedly connected to their respective sliding blocks.

[0022] According to an advantageous embodiment, a pressure spring is provided between the sliding block and the vertical section of the adjacent mounting block.

[0023] According to an advantageous embodiment, the first retainer is fixedly disposed at the bottom of the receiving groove and its upper end is lower than the upper end of the lower mold. The distance between the upper end of the first retainer and the upper end of the lower mold is the same as the thickness of the elastic strip. The side of the first retainer facing the inner mold roller is an arc-shaped surface.

[0024] According to an advantageous embodiment, the circumferential surface of the inner mold roller has two left-right symmetrical arc-shaped grooves with arc-shaped cross sections. When the elastic strip and the metal mesh are wound, the positioning post two enters the corresponding arc-shaped groove.

[0025] According to an advantageous embodiment, the second retainer is fixedly disposed on the upper end of the side mold, and the two second retainers that are opposite each other on the left and right are symmetrical to each other, and the free end of the second retainer has a semi-circular transverse cross section.

[0026] The lower end face of the positioning block is provided with a docking groove that mates with the second retainer. Rubber ball retainers are fixedly installed on the front and rear inner walls of the docking groove.

[0027] In summary, the present invention has the following beneficial effects: The present invention utilizes the elastic strip and positioning post two in the guide unit to jointly form a four-point positioning guide frame for the metal mesh, and this positioning reference is determined by a known reference during clamping and unloading. During the mold closing process of the lower mold, the cooperation between the retaining member one and the elastic strip maintains the limiting guidance of the metal mesh. During the mold closing process of the side mold, the cooperation between the retaining member two and the elastic strip maintains the limiting guidance of the metal mesh. Therefore, the four-point positioning guide is maintained throughout the process from metal mesh unloading to welding completion, thus avoiding the quality problem of misalignment of the final filter element frame caused by deviation of the metal mesh during mold closing. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0029] Figure 1 A three-dimensional structural schematic diagram of a filter accessory welding device according to an embodiment of the present invention is shown; Figure 2 This is a front view schematic diagram of a partial structure of a filter accessory welding equipment according to an embodiment of the present invention; Figure 3 A three-dimensional structural schematic diagram of a filter accessory welding device according to an embodiment of the present invention is shown; Figure 4 A partial cross-sectional perspective view of the three-dimensional structure between the movable seat, the feeding clamp, and the positioning post according to an embodiment of the present invention is shown. Figure 5 A partial cross-sectional front view of the inner mold roller, lower mold, and fixed base provided according to an embodiment of the present invention is shown; Figure 6 A partial cross-sectional front view of the fixing seat, elastic strip, and positioning block provided according to an embodiment of the present invention is shown; Figure 7 The present invention provides an embodiment of the invention. Figure 6 Enlarged view of point A in the middle; Figure 8 This diagram illustrates a three-dimensional structure between the side mold, the second retainer, and the lower mold according to an embodiment of the present invention. Figure 9 The present invention provides an embodiment of the invention. Figure 8 Enlarged view of point B in the middle; Figure 10A schematic diagram illustrating the state changes of a metal mesh winding according to an embodiment of the present invention is shown.

[0030] The above-mentioned drawings include the following reference numerals: 1. Mounting frame; 10. Inner mold roller; 100. Arc groove; 11. Lower mold; 110. Receiving groove; 12. Side mold; 120. Clearance groove; 13. Roller electrode; 2. Feeding assembly; 20. Feeding clamp; 21. Moving seat; 22. Positioning post one; 3. Positioning stake; 4. Guide unit; 40. Elastic strip; 41. Positioning block; 410. Positioning post two; 411. Connecting groove; 412. Clamping ball; 42. Fixed seat; 420. Sliding block; 421. Mounting block; 422. Support arm; 423. Gear; 424. Tooth plate; 425. Compression spring; 5. Holding assembly; 50. Holding component one; 51. Holding component two. Detailed Implementation

[0031] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] like Figure 1 and Figure 2 As shown, a filter accessory welding equipment includes: a mounting frame 1, an inner mold roller 10 with its axis extending forward and backward is fixedly mounted on the mounting frame 1, the diameter of the inner mold roller 10 is the same as the diameter of the filter element skeleton, a lower mold 11 capable of vertical lifting is provided below the inner mold roller 10, side molds 12 capable of horizontal movement are provided on both the left and right sides of the inner mold roller 10, and a roller electrode 13 for resistance welding is provided on the mounting frame 1.

[0033] The mounting frame 1 is equipped with a feeding assembly 2, which includes two feeding clamps 20 that are distributed left and right and can move back and forth. The feeding clamps 20 hold the metal mesh to be welded and transfer it between the inner mold roller 10 and the lower mold 11.

[0034] The mounting frame 1 is provided with two positioning posts 3 that are distributed front to back and slide vertically through the lower mold 11. The metal mesh is pressed against the inner mold roller 10 by the upward movement of the positioning posts 3 to form a primary guide.

[0035] like Figure 1 , Figure 2 and Figure 5As shown, the mounting frame 1 is provided with two sets of guide units 4 distributed front and back. The guide unit 4 includes two elastic strips 40 distributed left and right and located between the inner mold roller 10 and the lower mold 11. The side of the elastic strip 40 near the feeding clamp 20 is provided with a positioning block 41 for holding the metal mesh.

[0036] Adjust the left and right positions of the positioning blocks 41 so that the four positioning blocks 41 together form a four-point positioning guide frame, forming a secondary guide.

[0037] like Figure 1 and Figure 3 As shown, the lower mold 11 and the side mold 12 are jointly provided with a support component 5 for driving the elastic strip 40 to maintain the positioning effect of the metal mesh during the mold closing process. The support component 5 includes a support member 1 50 provided on the lower mold 11 and a support member 2 51 provided on the upper mold.

[0038] First, the feeding clamp 20 in the feeding assembly 2 picks up the metal mesh and transfers it between the inner mold roller 10 and the lower mold 11. It's important to note that when the feeding clamp 20 clamps the metal mesh, it already defines the straightness and lateral length of the mesh, thus establishing its orientation and physical state. When the metal mesh is wound into a circle in this state, the connection point is directly below the roller electrode 13, and the mesh is held in a straight position. Then, the positioning post 3 moves upward and presses the metal mesh onto the inner mold roller 10. Simultaneously, the elastic strip 40 and positioning block 41 in the guide unit 4 move upward and engage with the metal mesh, forming a four-point positioning. At this point, the feeding clamp 20 releases its grip. Next, the lower mold 11 moves upward and gradually engages with the inner mold roller 10. During this process, the engagement between the maintaining component 50 and the guide unit 4 ensures the positioning of the metal mesh is maintained during the initial winding process. Finally, the lower mold 11 presses the lower half of the metal mesh firmly onto the inner mold roller 10. Then, the two side molds 12 move closer to the inner mold roller 10. During this process, the cooperation between the second retainer 51 and the guide unit 4 maintains the positioning effect on the metal mesh during the re-rolling of the metal plate. Finally, the side molds 12 press the left and right ends of the metal mesh onto the inner mold roller 10, at which point the metal mesh is wound into a cylindrical shape. Then, the roller electrode 13 moves down and contacts the upper connection of the metal mesh, moves from front to back and performs welding. After welding is completed, the side molds 12, the lower mold 11 and the guide unit 4 are all reset, and the formed filter element skeleton is pushed out, completing a single welding operation. The changes in the winding state of the metal mesh and the changes in the moving positions of the lower mold 11 and the side molds 12 are all referred to Figure 10 .

[0039] In summary, through the positioning effect of the guide unit 4, the positioning effect of the metal mesh is maintained throughout the process of rolling the metal mesh on the lower side and the upper side. This avoids the problem of misalignment at the front and rear ends of the formed filter element skeleton caused by the metal mesh shifting or friction between the metal mesh and the side mold 12 during the rolling process. Therefore, the above operation process improves the welding accuracy and welding quality.

[0040] Secondly, it is necessary to add some explanation regarding the above operation process. A copper pad for rolling is provided on the upper side of the inner mold roller 10, and it is located below the connection point after the metal mesh is rolled into a circle. During welding, the roller electrode 13 moves down and presses the connection point (welding area) of the metal mesh onto the copper pad for rolling. The roller electrode 13 is energized and moves from front to back. The metal is melted by contact resistance heat to form a continuous sealed weld at the connection point of the metal mesh. This welding step belongs to the external existing technology and is a known feature, so it will not be described in detail hereafter.

[0041] like Figure 1 and Figure 4 As shown, the feeding assembly 2 also includes electric push rods. Two electric push rods are arranged on the mounting frame 1, and a movable seat 21 is fixedly provided on the front end face of the telescopic end of the electric push rod.

[0042] The feeding clamp 20 includes two symmetrical clamping plates, which are slidably mounted on the movable seat 21. The clamping plates are driven to move up and down by an external electric guide rod (not shown in the figure).

[0043] Two positioning posts 22 are fixedly installed on the lower clamping plate. In order to facilitate the positioning post 3 to be inserted into the prism hole of the metal mesh, the upper end of the positioning post 22 is chamfered. When the feeding clamp 20 clamps the metal mesh, the positioning post 22 is inserted into the corresponding prism hole and maintains the straightness of the metal mesh.

[0044] During operation, the electric push rod's telescopic end moves the movable seat 21 forward, which in turn moves the feeding clamp 20 to the loading area (located in front of the inner mold roller 10). Within this area, the metal mesh is fed between the two clamping plates by a robotic arm or an external feeding device capable of feeding, causing the positioning pin 22 to engage in the corresponding ridge hole. An external electric guide rod then moves the two clamping plates closer together to hold the metal mesh. The telescopic end of the electric push rod resets the feeding clamp 20, and the clamped metal mesh moves directly below the inner mold roller 10. This completes the placement and positioning process before the metal mesh is rolled, establishing the initial reference. It should be noted that the direct purpose of the above process is to determine the initial reference of the metal mesh and maintain the clamping effect of the feeding clamp 20. Existing technologies that include feeding and determining the initial clamping reference can replace the above process, and will not be elaborated further.

[0045] like Figure 2 and Figure 3 As shown, the lower mold 11 is driven by a hydraulic cylinder (not shown in the figure) to move up and down, and the side mold 12 is driven by a hydraulic cylinder to move left and right.

[0046] like Figure 1 and Figure 8 As shown, the upper side of the lower mold 11 is a concave semi-circle, and the lower mold 11 is provided with a receiving groove 110 for avoiding the guide unit 4. The two side molds 12 are symmetrical from left to right. Taking the left side mold 12 as an example, the right end face of the left side mold 12 is an arc shape that fits with the inner mold roller 10, and the side mold 12 is provided with an avoidance groove 120 for avoiding the guide unit 4.

[0047] like Figure 2 As shown, the axis of the positioning pile 3 extends vertically, and the two positioning piles 3 are driven by hydraulic cylinders to move up and down respectively. The upper end surface of the positioning pile 3 is chamfered.

[0048] After the metal mesh moves between the inner mold roller 10 and the lower mold 11, the hydraulic cylinder 3 operates, causing the two positioning posts 3 to move upward. The upward movement of the positioning posts 3 presses the metal mesh onto the inner mold roller 10, thereby initially tightening and limiting the metal mesh. Subsequently, the elastic strip 40 and the positioning block 41 in the guide unit 4 adhere to the metal mesh and perform initial limiting, thus completing the positioning operation. Afterward, the feeding clamp 20 releases its clamp, and the lower mold 11 moves upward, causing the middle section of the metal mesh to roll up. Then, the two side molds 12 move closer to each other, causing the left and right sections of the metal mesh to roll up, thus completing all the rolling steps of the metal mesh. The receiving groove 110 and the avoidance groove 120 are both for avoiding the rolling process of the elastic strip 40 in the guide unit 4. Afterward, the welding process is carried out.

[0049] like Figure 1 , Figure 6 and Figure 7 As shown, the guide unit 4 also includes a fixed base 42. The fixed base 42 is fixedly installed on the lower side of the positioning pile 3 through a connecting frame. The upper end of the fixed base 42 is slidably provided with a sliding block 420. The opposite sides of the two sliding blocks 420 are each provided with an L-shaped mounting block 421. The elastic strip 40 is fixedly installed on the horizontal section of the mounting block 421.

[0050] Two support arms 422, distributed front to back and used to support the elastic strip 40, are fixedly provided on the end face of the horizontal section of the mounting block 421 away from the sliding block 420.

[0051] like Figure 6 and Figure 9As shown, a second positioning post 410 is fixedly provided on the upper end surface of the positioning block 41. In order to facilitate the positioning post 32 to be inserted into the prism hole of the metal mesh, the upper end of the second positioning post 410 is chamfered.

[0052] The fixed base 42 has a hollow structure. A gear 423 with its axis extending back and forth is rotatably arranged in the fixed base 42 via a rotating shaft (the rotating shaft is connected to an external motor (not shown in the figure)). Two toothed plates 424 are slidably arranged in the fixed base 42, which are distributed vertically and mesh with the gear 423. The two toothed plates 424 are respectively fixedly connected to the corresponding sliding blocks 420.

[0053] like Figure 7 As shown, a pressure spring 425 is provided between the sliding block 420 and the vertical section of the adjacent mounting block 421.

[0054] In the initial state, the support arm 422 supports the elastic strip 40 and the positioning block 41 on it, so as to avoid the free segment of the elastic strip 40 bending too much downward due to their own weight, which would affect the subsequent guidance and positioning process. Secondly, the positioning block 41 is made of lightweight material to reduce the interference of the positioning block 41's own weight.

[0055] Initially, the external motor drives the rotating shaft to rotate synchronously. The meshing between the gear 423 on the rotating shaft and the corresponding toothed plate 424 causes the toothed plate 424 to drive the corresponding elastic strip 40 to move closer to each other. The elastic strip 40 drives the positioning block 41 and the second positioning post 410 to move synchronously, which facilitates the subsequent entry of the second positioning post 410 into the corresponding prism hole.

[0056] During the process of positioning stake 3 pressing the metal mesh, positioning stake 3 drives fixed seat 42 to move upward synchronously. When positioning stake 3 completes the pressing action, fixed seat 42 drives elastic strip 40 and positioning block 41 on it to move upward until they are in close contact with the metal mesh. At this time, positioning post 410 moves upward and gets into the corresponding ridge hole. At this time, the left and right opposite positioning posts 410 do not play a positioning role for the metal mesh. Afterward, the external motor works to make the rotating shaft reverse. Through the meshing between gear 423 and toothed plate 424, the two left and right opposite toothed plates 424 move away from each other. Therefore, elastic strip 40 carries The positioning pin 410 moves synchronously, and the positioning pin 410 contacts the inner wall of the corresponding prism hole away from the fixed seat 42. As the rotating shaft continues to rotate, the pressure spring 425 deforms. The elastic force generated by the deformation of the pressure spring 425 causes the positioning block 41 to drive the positioning pin 410 to move away from the fixed seat 42. That is, the two positioning pins 410 on the left and right sides clamp the metal mesh for positioning. In summary, with the tightness and limit of the positioning stake 3, the initial positioning of the physical state of the metal mesh is formed. At this time, the feeding clamp 20 can be released.

[0057] Regarding the elastic positioning process of the aforementioned positioning post 410, it is necessary to further explain that: since the length of the metal mesh is greater than the circumference of the formed filter element skeleton, the connection point after the metal mesh is rolled into a circle is formed by the left and right sides of the metal mesh stacking on each other. Since the mesh position (perforation position) of the metal mesh is usually randomly distributed due to the cutting process, and since the area of ​​the perforation is not large, elastic positioning will affect the left and right position of the metal mesh. However, through the pressing positioning of the positioning post 3 and the overlapping formation of the connection point, and after multiple tests conducted by professionals in the field before operation, it was found that when the pressing effect of the positioning post 3 decreases and the metal mesh moves left and right, the stacking effect at the connection point will not affect the welding connection strength. In summary, the above elastic positioning can ensure the positioning of the left and right positions of the metal mesh without affecting the subsequent welding strength of the metal mesh. In addition, if the metal mesh is formed by a cutting operation after precise shape control, the perforations on the metal mesh are symmetrical. In this case, the sliding block 420 and the mounting block 421 can be fixedly connected, so that the two positioning posts 410 on the left and right can be directly opened and positioned.

[0058] like Figure 5 and Figure 8 As shown, the retaining member 50 is fixedly disposed at the bottom of the receiving groove 110 and its upper end is lower than the upper end of the lower mold 11. The distance between the upper end of the retaining member 50 and the upper end of the lower mold 11 is the same as the thickness of the elastic strip 40. The side of the retaining member 50 facing the inner mold roller 10 is an arc-shaped surface.

[0059] After the feeding clamp 20 is released, the hydraulic cylinder 1 operates, causing the lower mold 11 to move upward. The lower mold 11 drives the retaining member 50 on it to move upward synchronously. When the upper end of the lower mold 11 contacts the metal mesh, the retaining member 50 contacts the corresponding elastic strip 40. As the lower mold 11 continues to move upward, the lower mold 11 causes the metal mesh to deform, and the retaining member 50 also causes the elastic strip 40 to deform. The metal mesh and the elastic strip 40 gradually fit the shape of the inner mold roller 10, and finally the middle part of the metal mesh is rolled into a circle. In the above process, the elastic strip 40 always positions the metal mesh to ensure that the lateral position of the metal mesh meets the requirements of the rolling operation.

[0060] like Figure 1 , Figure 3 and Figure 5 As shown, the inner mold roller 10 has two left-right symmetrical arc grooves 100 with arc-shaped cross sections on its circumferential surface. When the elastic strip 40 and the metal mesh are wound, the positioning post 410 enters the corresponding arc groove 100.

[0061] like Figure 2 and Figure 8 As shown, the second support member 51 is fixedly installed on the upper end of the side mold 12. The two support members 51 on the left and right are symmetrical to each other, and the free end of the support member 51 has a semi-circular cross section.

[0062] like Figure 9 As shown, the lower end face of the positioning block 41 is provided with a docking groove 411 that mates with the second retainer 51, and rubber ball retainers 412 are fixedly provided on the front and rear inner walls of the docking groove 411.

[0063] After the middle part of the metal mesh is rolled into a circle, the section of the elastic strip 40 near the positioning block 41 remains straight, while the section near the fixed seat 42 is curved. Then, the hydraulic cylinder 2 works to bring the side mold 12 closer to the inner mold roller 10. The side mold 12 drives the second retainer 51 on it to move synchronously. When the side mold 12 contacts the metal mesh, the second retainer 51 is engaged in the corresponding docking groove 411. As the side mold 12 continues to move, the side mold 12 pushes the metal mesh, and the second retainer 51 pushes the corresponding positioning block 41. Finally, both sides of the metal mesh are rolled into an arc shape, that is, the metal mesh is rolled into a cylindrical shape, and then welding is performed.

[0064] During the process of the retainer 51 pushing the positioning block 41, it should be further explained that: when the side mold 12 moves continuously, the retainer 51 first engages in the mating groove 411 and pushes the corresponding positioning block 41 to move continuously. As the elastic strip 40 and the metal mesh gradually bend, the retainer 51 gradually disengages from the mating groove 411. Through the cooperation between the retainer 51 and the retaining ball 412, the friction between the retainer 51 and the inner wall of the mating groove 411 is increased, so that the retainer 51 exerts a force on the positioning block 41 along the straight section of the elastic strip 40 and away from the elastic strip 40. Therefore, the two positioning blocks 41 always maintain the limiting force on the metal mesh, avoiding the problem that the limiting effect on the metal mesh will decrease after the middle section of the elastic strip 40 is wound. In addition, after the metal mesh is completely rolled up, the retainer 51 restricts the elastic strip 40 to reset by restricting the positioning block 41, avoiding the influence of the elastic deformation of the elastic strip 40 itself on the shape of the metal mesh. In summary, the entire rolling action of a single metal mesh is completed at this point. During the rolling process of the lower half of the rolled metal mesh, the elastic strip 40 and the first retainer 50 maintain and guide the positioning effect. During the rolling process of the upper half of the rolled metal mesh, the elastic strip 40 and the second retainer 51 maintain and guide the positioning effect.

[0065] Secondly, during the above process, the second positioning post 410 on the positioning block 41 is inserted into the corresponding arc-shaped groove 100. The arc-shaped groove 100 not only avoids the positioning post, but also strictly limits the front and back position of the metal mesh again through the cooperation between the arc-shaped groove 100 and the second positioning post 410, so as to avoid the problem of misalignment affecting the welding quality.

[0066] Finally, it is necessary to add that in the existing welding process, similar molds as the lower mold 11, side mold 12 and inner mold roller 10 in this technical solution are also used, and the metal mesh is rolled into a circle by the mold closing method. However, during the placement process, the position of the metal mesh is not continuously limited. During the process of the lower mold 11 moving upward and closing the mold, and during the process of the side mold 12 closing the mold, the metal mesh will deviate due to friction with it. This can easily lead to the problem of misalignment after welding due to the deviation of the metal mesh, which affects the welding strength. In severe cases, it can easily lead to the scrapping of the resulting filter element skeleton. This technical solution adds a guide unit 4 and a holding component 5. First, the elastic strip 40 and the second positioning post 410 in the guide unit 4 form a four-point positioning guide frame for the metal mesh. The positioning reference contacts the initial clamping reference of the feeding clamp 20 after feeding. During the mold closing process of the lower mold 11, the metal mesh is always kept in place by the cooperation between the first holding component 50 and the guide unit 4. During the mold closing process of the side mold 12, the metal mesh is also always kept in place by the cooperation between the second holding component 51 and the guide unit 4, which improves the accuracy of the metal mesh rolling and avoids the problem of misaligned edges. The above-mentioned added components are all external conventional mechanical components, which can be used for a long time after a single installation. Compared with the benefits brought by improving the welding effect, the cost of adding components is negligible. In summary, this technical solution is a specific improvement made entirely based on the defects of the existing technology and to solve the defects of the technology.

[0067] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0068] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0069] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" 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 communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0070] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A filter accessory welding equipment, characterized in that, include: The mounting frame is fixedly equipped with an inner mold roller, the diameter of which is the same as that of the filter element skeleton. A lower mold is set below the inner mold roller, and side molds are set on both the left and right sides of the inner mold roller. Roller electrodes are set on the mounting frame. The mounting frame is equipped with a feeding assembly, which includes two feeding clamps. The feeding clamps hold the metal mesh to be welded and move it between the inner mold roller and the lower mold. The mounting frame is equipped with two positioning pins that are distributed front to back and slide vertically through the lower mold. The metal mesh is pressed against the inner mold roller by the upward movement of the positioning pins to form a primary guide. The mounting frame is equipped with two sets of guide units distributed front and back. Each guide unit includes two elastic strips distributed left and right and located between the inner mold roller and the lower mold. The side of the elastic strips closest to the feeding clamp is equipped with positioning blocks for holding the metal mesh. Adjust the left and right positions of the positioning blocks so that the four positioning blocks together form a four-point positioning guide frame, forming a secondary guide; The lower mold and the side mold are jointly provided with a support component for driving the elastic strip to maintain the positioning effect of the metal mesh during the mold closing process. The support component includes a support member one provided on the lower mold and a support member two provided on the upper mold.

2. The filter accessory welding equipment according to claim 1, characterized in that: The feeding assembly also includes electric push rods. Two electric push rods are arranged on the mounting frame, and a movable seat is fixedly provided on the front end face of the telescopic end of the electric push rod. The feeding clamp includes two symmetrical clamping plates, which are slidably mounted on the movable seat. Two positioning posts are fixedly installed on the lower clamping plate, one in front and one behind. When the feeding clamp holds the metal mesh, the positioning posts one are engaged in the corresponding prism holes and maintain the straightness of the metal mesh.

3. The filter accessory welding equipment according to claim 1, characterized in that: The upper side of the lower mold is a concave semi-circle, and a receiving groove for avoiding the guide unit is provided on the lower mold. The two side molds are symmetrical. The right end face of the left side mold is an arc shape that fits with the inner mold roller, and an avoidance groove for avoiding the guide unit is provided on the side mold.

4. The filter accessory welding equipment according to claim 1, characterized in that: The axis of the positioning pile extends vertically, and the two positioning piles are moved up and down by hydraulic cylinders. The upper end surface of the positioning pile is chamfered.

5. The filter accessory welding equipment according to claim 1, characterized in that: The guiding unit also includes a fixed seat. A fixed seat is fixedly installed on the lower side of the positioning pile through a connecting frame. A sliding block is slidably installed on the upper end of the fixed seat. An L-shaped mounting block is slidably installed on the opposite sides of the two sliding blocks. An elastic strip is fixedly installed on the horizontal section of the mounting block. Two support arms, distributed front to back and used to support the elastic strip, are fixedly installed on the end face of the horizontal section of the mounting block away from the sliding block.

6. The filter accessory welding equipment according to claim 5, characterized in that: A second positioning post is fixedly provided on the upper end face of the positioning block; The fixed base has a hollow structure. A gear with its axis extending back and forth is rotatably installed inside the fixed base via a rotating shaft. Two toothed plates, which are distributed vertically and mesh with the gear, are slidably installed inside the fixed base. The two toothed plates are fixedly connected to their respective sliding blocks.

7. The filter accessory welding equipment according to claim 5, characterized in that: A pressure spring is provided between the sliding block and the vertical section of the adjacent mounting block.

8. The filter accessory welding equipment according to claim 1, characterized in that: The first retainer is fixedly installed at the bottom of the receiving groove and its upper end is lower than the upper end of the lower mold. The distance between the upper end of the first retainer and the upper end of the lower mold is the same as the thickness of the elastic strip. The side of the first retainer facing the inner mold roller is an arc-shaped surface.

9. The filter accessory welding equipment according to claim 6, characterized in that: The inner mold roller has two symmetrical arc-shaped grooves on its circumferential surface. When the elastic strip and metal mesh are wound, the positioning post two enters the corresponding arc-shaped groove.

10. The filter accessory welding equipment according to claim 1, characterized in that: The second retainer is fixedly installed on the upper end of the side mold. The two second retainers on the left and right are symmetrical to each other, and the free end of the second retainer has a semi-circular cross section. The lower end face of the positioning block is provided with a docking groove that mates with the second retainer. Rubber ball retainers are fixedly installed on the front and rear inner walls of the docking groove.

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