CN121132009B - A laser welding device for filter processing - Google Patents

Abstract

The invention relates to the technical field of laser welding devices, and provides a laser welding device for filter processing, which is used for welding a filter screen cylinder of a filter with an end ring body, and comprises a workbench and a centering bracket; the support cylinder is rotatably arranged between the centering brackets, the two chucks are correspondingly arranged on the two centering brackets and are oppositely arranged, the chucks are used for installing end ring bodies, a gap is formed between the end face of each chuck and the end of the support cylinder, the gap corresponds to a part to be welded of the filter screen cylinder and the end ring bodies, the plurality of pressing roller wheel sets are rotatably arranged on the chucks at intervals along the circumferential direction of the chucks, and a welding area is formed between every two adjacent pressing roller wheel sets. The radial limiting structure formed by the cooperation of the second roller and the supporting cylinder effectively solves the problem that the alignment precision of the part to be welded of the filter screen cylinder and the end ring body in the prior art is insufficient, and greatly improves the welding alignment precision.

Description

A laser welding device for filter processing

Technical Field

This invention relates to the field of laser welding equipment technology, and more specifically, to a laser welding device for filter processing.

Background Technology

In the production and processing of filters, the welding of the filter cylinder and the end ring is a critical process, and its quality directly affects the filtration performance and service life of the filter. Currently, the industry mostly uses laser welding technology to connect the two, which has advantages such as high welding precision and small heat-affected zone. However, when using existing filter laser welding equipment, it is usually necessary to first position the filter cylinder and the end ring, and then weld the parts to be welded using a laser welding head. However, since the filter cylinder is mostly a thin-walled cylindrical structure, and there is a certain error in the dimensional fit between the end ring and the filter cylinder, the alignment accuracy of the parts to be welded is prone to occur during the positioning process. At the same time, the radial limiting effect of the existing equipment on the filter cylinder and the end ring is not good. During the welding process, as the equipment operates, the two may be radially offset, resulting in deviation of the welding position and affecting the welding quality. In addition, some equipment has a complex structure, and the operation of changing the appropriate support and positioning components for different specifications of filter cylinders and end rings is cumbersome, reducing production efficiency.

Summary of the Invention

To overcome the above-mentioned defects, embodiments of the present invention provide a laser welding device for filter processing, which solves the technical problems of insufficient alignment accuracy between the filter cylinder and the end ring to be welded, poor radial limiting effect on the filter cylinder, and weak versatility and adaptability of the existing laser welding devices for filter processing.

According to one aspect, at least one embodiment of the present invention provides a laser welding apparatus for filter processing, used for welding an end ring to a filter screen cylinder to form a filter, comprising:

Workbench;

A support cylinder is rotatably mounted on the worktable to support the inner wall of the filter cylinder;

Two centering brackets are symmetrically located at both ends of the support cylinder. A chuck is provided on the side of the centering bracket adjacent to the support cylinder. The chuck is used to install the end ring. Multiple sets of circumferentially spaced pressure rollers are rotatably connected to each chuck. A welding area is formed between two adjacent sets of pressure rollers.

Each of the pressure roller sets includes a first roller and a second roller arranged coaxially. The first roller is used to press against the outer wall of the end ring, and the second roller is used to press against the outer wall of the filter cylinder. The second roller can cooperate with the first roller to make the filter cylinder and the end ring axially aligned.

Optionally, one of the centering brackets is provided with a driver having an output shaft extending axially along the support cylinder; the other centering bracket is slidably provided with a support rod extending axially along the support cylinder, the support rod being axially slidable to adjust the distance between it and the output shaft of the driver.

One end of the support cylinder is detachably connected to the output shaft of the driver, and the other end is detachably connected to the support rod. The driver is used to drive the support cylinder to rotate so as to drive the filter cylinder to rotate.

Optionally, the support rod is provided with an upward-facing limiting seat, and both ends of the support cylinder are provided with fixed shafts. The fixed shafts are arranged coaxially with the support cylinder, and the end of the fixed shaft adjacent to the support rod is detachably disposed in the limiting seat and rotates with the limiting seat.

Optionally, the chuck includes:

A fixed plate is provided with an insertion hole, and a detachable insertion rod is provided on the centering bracket. The insertion rod is inserted into the insertion hole to restrict the circumferential rotation of the fixed plate.

A turntable is rotatably mounted on the fixed disk. The turntable and the fixed disk are arranged coaxially. The turntable is used to be sleeved on the outer circumference of the fixed shaft. The turntable can rotate with the fixed shaft to drive the end ring to rotate.

Optionally, the turntable is provided with a plurality of support rollers, which are spaced apart along the axial direction of the turntable. The support rollers are used to support the inner wall of the end ring.

Optionally, the fixed disk is provided with a plurality of circumferentially spaced connecting shafts, and each connecting shaft is fitted with a set of pressure rollers. The connecting shaft can drive the first roller and the second roller of the pressure roller set to rotate synchronously.

Optionally, the first and second rollers have tapered shaft holes with openings opposite each other, and the pressure roller assembly further includes:

A locking sleeve has a through hole for installing a connecting shaft; the outer wall of the locking sleeve has two oblique conical surfaces that correspond one-to-one with the conical shaft hole;

At least two pull rods are provided, with each pull rod having its two ends passing through the first roller and the second roller respectively. The two ends of the pull rod are threaded with lock nuts for pulling the first roller and the second roller in opposite directions.

Optionally, a plurality of necking grooves extending axially to the outer end of the locking sleeve are provided through the peripheral wall of the locking sleeve. When the pull rod pulls the first roller and the second roller to the middle of the locking sleeve at the same time, the width of the necking groove is reduced under the pressure of the inner wall of the tapered shaft hole, so that the locking sleeve is pressed against the outer wall of the connecting shaft.

Optionally, the workbench is further provided with a hoisting and transfer mechanism, which includes:

A fixed frame is provided on the workbench;

A crossbeam, one end of which is rotatably mounted on the fixed frame, and the other end of which extends above the support cylinder;

A mounting bracket is provided at the other end of the crossbeam, and a longitudinally arranged lead screw motor is provided on the mounting bracket;

The electric gripper is connected to the power output end of the lead screw motor. The electric gripper can move down and approach the support cylinder under the drive of the lead screw motor, and clamp the support cylinder.

Optionally, the workbench is provided with a slide rail extending along the axial direction of the support cylinder, and a lifting top plate is slidably disposed on the slide rail. The lifting top plate has a lifting end, which can push the fixed shaft upward so that the fixed shaft moves out from the opening in the limiting seat.

The beneficial effects of this invention are as follows:

In this invention, before welding, the filter screen cylinder is first inserted into the support cylinder, ensuring that the inner wall of the filter screen cylinder is completely flush with the outer wall of the support cylinder, achieving initial positioning and support. Next, the two end rings are respectively installed onto two chucks, and the position of the end rings is adjusted so that the parts to be welded face the end of the support cylinder. Then, by adjusting the pressure roller sets, the first roller presses tightly against the outer wall of the end ring, fixing the end ring; simultaneously, the second roller presses against the outer wall of the filter screen cylinder, cooperating with the support cylinder to form a radial limit on the filter screen cylinder. Through this double limiting effect, the relative position of the filter screen cylinder and the end rings is adjusted, ensuring that the parts to be welded are accurately aligned with the gap between the chuck end face and the end of the support cylinder. After alignment, the laser welding head passes through the welding area between two adjacent pressure roller sets to perform laser welding on the aligned parts to be welded.

In summary, the radial limiting structure formed by the cooperation of the second roller and the support cylinder effectively solves the problem of insufficient alignment accuracy between the filter screen cylinder and the end ring to be welded in the prior art, greatly improving the welding alignment accuracy and fundamentally ensuring the stability of welding quality. The setting of the pressure roller group not only achieves stable fixation of the end ring and the filter screen cylinder, but also, during the welding process, the rotational characteristics of the rollers reduce frictional damage to the workpiece surface, while reducing welding defects caused by workpiece shaking during the welding process, thus improving the product qualification rate.

Attached Figure Description

To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of the present invention and these drawings without any creative effort.

Figure 1 is a schematic diagram of the structure of a laser welding device in one embodiment of the present invention;

Figure 2 is a partial enlarged view of point A in the embodiment of Figure 1;

Figure 3 is a structural schematic diagram of the laser welding device in the embodiment of Figure 1 from another perspective;

Figure 4 is a partial enlarged view of point C in the embodiment of Figure 3;

Figure 5 is a schematic diagram of the internal structure of the pressure roller assembly in the embodiment of Figure 1;

Figure 6 is a schematic diagram of the pressure roller assembly structure in the embodiment of Figure 1;

Figure 7 is a schematic diagram of the chuck structure in the embodiment of Figure 1;

Figure 8 is a partial enlarged view of point B in the embodiment of Figure 1.

In the diagram: 1. Workbench; 2. End ring; 3. Filter screen cylinder; 4. Centering bracket; 5. Support cylinder; 6. Chuck; 601. Gap; 61. Fixed plate; 610. Insertion hole; 62. Turntable; 63. Support roller; 64. Connecting shaft; 7. Pressure roller assembly; 701. Tapered shaft hole; 71. First roller; 72. Second roller; 73. Locking sleeve; 74. Through hole; 75. Inclined conical surface; 76. Tie rod; 77. Locking nut; 78. Necking groove; 8. Support rod; 9. Fixed shaft; 10. Limit seat; 11. Insertion rod; 12. Lifting and transfer mechanism; 1201. Fixed frame; 1202. Crossbeam; 1203. Mounting frame; 1204. Screw motor; 1205. Electric gripper; 13. Slide rail; 14. Lifting top plate.

Detailed Implementation

The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it.

To keep the drawings concise, each drawing only schematically shows the parts relevant to the invention; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections 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 based on the specific circumstances.

In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

As shown in Figures 1-8, a laser welding apparatus for filter processing according to an embodiment of the present invention is illustrated. This apparatus is used to weld the filter screen cylinder 3 to the end ring 2 of a filter. It includes a worktable 1 with two centering supports 4 fixedly installed at a certain interval. The positions of the centering supports 4 ensure that the support cylinder 5 can be stably rotated and supported between them. The support cylinder 5 is rotatably positioned between the two centering supports 4, and its outer wall can fit tightly against the inner wall of the filter screen cylinder 3, providing internal support for the filter screen cylinder 3. Two chucks 6 are provided, each corresponding to one of the two supports 4. On the centering bracket 4, they are arranged opposite each other. The end face of the chuck 6 is flat. The gap 601 formed between the chuck 6 and the end of the support cylinder 5 is slightly larger than the weld width during welding. This can prevent the filter cylinder 3 and the support cylinder 5 from being welded together during welding. It also corresponds to the welding part of the filter cylinder 3 and the end ring 2, ensuring that the laser can accurately act on the welding part. There are several pressure roller groups 7. Several pressure roller groups 7 are arranged at intervals along the circumference of the chuck 6. These pressure roller groups 7 are rotatably mounted on the chuck 6 through bearings. The space between two adjacent pressure roller groups 7 forms a welding area, which facilitates the laser welding head to extend into and perform welding operations. The first roller 71 and the second roller 72 in each pressure roller group 7 are made of wear-resistant and elastic rubber. The wheel surface shape of the first roller 71 is adapted to the outer wall of the end ring 2, and can tightly press against the outer wall of the end ring 2. The wheel surface of the second roller 72 is matched with the outer wall shape of the filter screen cylinder 3, and can stably press against the outer wall of the filter screen cylinder 3. The second roller 72 cooperates with the support cylinder 5 to form a radial limit on the filter screen cylinder 3 from the inner and outer sides, thereby aligning the filter screen cylinder 3 with the part to be welded on the end ring 2.

For example, as shown in Figure 1, specifically, before welding, the filter cylinder 3 is first inserted into the support cylinder 5, ensuring that the inner wall of the filter cylinder 3 is completely in contact with the outer wall of the support cylinder 5, achieving preliminary positioning and support. Next, the two end rings 2 are respectively installed onto the two chucks 6, and the position of the end rings 2 is adjusted so that the part to be welded faces the end of the support cylinder 5. Then, by adjusting the pressure roller group 7, the first roller 71 is pressed tightly against the outer wall of the end ring 2, cooperating with the support cylinder 5 to fix the end ring 2; simultaneously, the second roller 72 presses against the outer wall of the filter cylinder 3, cooperating with the support cylinder 5 to form a radial limit on the filter cylinder 3. Through this double limiting effect, the relative position of the filter cylinder 3 and the end ring 2 is adjusted so that the parts to be welded are accurately aligned with the gap 601 between the end face of the chuck 6 and the end of the support cylinder 5. After alignment, the laser welding head passes through the welding area between two adjacent pressure roller groups 7 to perform laser welding on the aligned parts to be welded.

In summary, this solution, through the radial limiting structure formed by the second roller 72 and the support cylinder 5, effectively solves the problem of insufficient alignment accuracy between the filter cylinder 3 and the end ring 2 to be welded in the prior art, greatly improving the welding alignment accuracy and fundamentally ensuring the stability of welding quality. The setting of the pressure roller group 7 not only achieves stable fixation of the end ring 2 and the filter cylinder 3, but also, during the welding process, the rotational characteristics of the rollers reduce frictional damage to the workpiece surface, while reducing welding defects caused by workpiece shaking during the welding process, thus improving the product qualification rate.

Furthermore, one of the centering brackets 4 is equipped with a driver, which can be a stable servo motor. The output shaft of the driver is aligned with the length direction of the worktable 1. The other centering bracket 4 has a circular hole for mounting a support rod 8. The support rod 8 is slidably mounted in the circular hole, and its axis is completely aligned with the axis of the driver's output shaft, ensuring smooth rotation of the support cylinder 5. The support rod 8 can slide freely along the circular hole. A locking device on the centering bracket 4 can fix the support rod 8 in the adjusted position, allowing for flexible adjustment of the distance between the end of the support rod 8 and the output shaft to accommodate filter cylinders 3 of different lengths. The fixing shafts 9 at both ends of the support cylinder 5 are integrally formed with the support cylinder 5, ensuring overall coaxiality. The ends of the fixing shafts 9 are equipped with connection interfaces that match the output shaft and the support rod 8, allowing for detachable bolt connections to enable quick connection and separation between the support cylinder 5 and the output shaft and support rod 8.

Specifically, before welding, according to the length of the filter cylinder 3 to be welded, the locking device on the centering bracket 4 is loosened, the support rod 8 is pushed to slide, and the distance between the end of the support rod 8 and the output shaft of the driver is adjusted to match the length of the filter cylinder 3. Then, the fixed shaft 9 at one end of the support cylinder 5 is bolted to the output shaft of the driver, and the fixed shaft 9 at the other end is also bolted to the support rod 8, ensuring that the support cylinder 5 is firmly installed and has good coaxiality. The driver is started, and the output shaft of the driver begins to rotate, driving the support cylinder 5 to rotate synchronously through the connecting structure. The support cylinder 5 then drives the filter cylinder 3 sleeved on it to rotate. At the same time as the filter cylinder 3 rotates, the end ring 2 also rotates synchronously with the assistance of the first roller 71 and the second roller 72, so that the parts of the filter cylinder 3 and the end ring 2 to be welded can be evenly welded by the laser welding head, ensuring that the welding quality of each point on the welding circumference is consistent.

Therefore, the sliding support rod 8 can easily adapt to filter cylinders 3 of different lengths, effectively solving the problem of poor versatility and adaptability of existing devices, and greatly improving the device's adaptability to filter components of different specifications. The detachable connection between the support cylinder 5 and the output shaft and support rod 8 makes it simple and quick to replace support cylinders 5 of different diameters to adapt to filter cylinders 3 of different inner diameters. The operation process does not require complicated tools and skills, reducing the difficulty of operation for workers and significantly improving production efficiency. The drive unit rotates the support cylinder 5, realizing the automation of the welding process, reducing errors caused by manual intervention, making the welding more uniform and stable, and further improving the welding quality.

In some examples, the support rod 8 and the driver output shaft are both provided with limit seats 10 at their ends located between the two centering brackets 4, and the opening of the limit seats 10 faces the top of the worktable 1; both ends of the support cylinder 5 are provided with fixed shafts 9, which are arranged coaxially with the support cylinder 5, and the fixed shafts 9 are detachably installed in the limit seats 10 and rotatably connected to the limit seats 10.

For example, as shown in Figure 2, when installing the support cylinder 5, align the fixed shafts 9 at both ends of the support cylinder 5 with the U-shaped openings of the limiting seat 10 and place it into the limiting seat 10, so that the journal of the fixed shaft 9 mates with the U-shaped opening in the limiting seat 10. After installation, the fixed shaft 9 can rotate flexibly within the limiting seat 10, while the U-shaped structure of the limiting seat 10 radially restricts the fixed shaft 9, preventing radial displacement during rotation. When the driver starts, the output shaft drives the fixed shaft 9 connected to it to rotate, which in turn drives the support cylinder 5 to rotate. The fixed shaft 9 at the other end of the support cylinder 5 rotates synchronously within the limiting seat 10. Due to the limiting effect of the limiting seat 10, the support cylinder 5 maintains a stable axial position during rotation and will not experience axial movement.

The setting of the limiting seat 10 further enhances the stability of the support cylinder 5 during rotation, effectively avoiding welding position deviation caused by axial offset of the support cylinder 5, and solving the problem of poor radial limiting effect of the filter cylinder 3 in the prior art, thus ensuring the consistency of welding quality from a structural perspective. The rotational connection between the fixed shaft 9 and the limiting seat 10 through bearings greatly reduces the frictional resistance between the two, reduces component wear, extends the service life of the device, and makes the rotation of the support cylinder 5 more stable and smooth, which is conducive to improving the stability of the welding process.

In some examples, the chuck 6 consists of two parts: a fixed plate 61 and a turntable 62. The fixed plate 61 has multiple evenly distributed insertion holes 610. The centering bracket 4 is provided with corresponding insertion rods 11 that match the insertion holes 610. The diameter of the insertion rods 11 is adapted to the inner diameter of the insertion holes 610. The insertion rods 11 and the insertion holes 610 are tightly connected. This connection structure can firmly fix and limit the fixed plate 61, preventing the fixed plate 61 from rotating or displacing during operation.

Furthermore, the turntable 62 is rotatably mounted on the fixed disk 61 via a thrust bearing, and the turntable 62 and the fixed disk 61 are arranged coaxially to ensure concentricity during rotation. A shaft hole is provided at the center of the turntable 62, which is fitted onto the fixed shaft 9 of the support cylinder 5. The turntable 62 and the fixed shaft 9 are connected by a key, and the high precision of the key and keyway ensures synchronous rotation between the turntable 62 and the fixed shaft 9.

For example, as shown in Figure 3, when installing the chuck 6, the insertion hole 610 on the fixed plate 61 is aligned with the insertion rod 11 on the centering bracket 4, and the insertion rod 11 is inserted into the insertion hole 610 to achieve fixed installation of the fixed plate 61 on the centering bracket 4. After the fixed plate 61 is installed, it will not rotate. Then, the turntable 62 is installed on the fixed plate 61 through a bearing, and the shaft hole of the turntable 62 is fitted onto the fixed shaft 9 of the support cylinder 5. The turntable 62 and the fixed shaft 9 are linked by a key connection. When the support cylinder 5 rotates under the drive of the driver, the fixed shaft 9 rotates synchronously. Through the transmission action of the key, the turntable 62 is driven to rotate on the fixed plate 61. Since the end ring 2 is installed on the turntable 62, the rotation of the turntable 62 drives the end ring 2 to rotate synchronously, so that the end ring 2 and the filter cylinder 3 fitted on the support cylinder 5 maintain synchronous rotation, ensuring that the laser welding process can be carried out continuously and uniformly.

In the above scheme, the insertion rod 11 is used to prevent the fixed disk 61 from rotating. The insertion and mating structure between the insertion rod 11 and the insertion hole 610 enables the quick installation and accurate positioning of the fixed disk 61. The installation process is simple and convenient, without complicated debugging steps, which greatly improves the assembly efficiency of the device. The keyed connection between the turntable 62 and the fixed shaft 9 ensures that the turntable 62 can rotate precisely and synchronously with the fixed shaft 9, ensuring the consistency of rotation between the end ring 2 and the filter cylinder 3. This avoids welding position deviation caused by asynchronous rotation of the two, significantly improves welding accuracy, effectively solves the problem of easy welding position deviation in the prior art, and ensures the stability of welding quality.

In some examples, a number of support rollers 63 are spaced along the axial direction on the turntable 62. These support rollers 63 are made of high-strength metal with a smooth surface to reduce friction with the inner wall of the end ring 2. The support rollers 63 are rotatably mounted on the turntable 62 via precision shafts. The connection between the shafts and the turntable 62 is robust and reliable, ensuring the support rollers 63 can rotate freely. The number of support rollers 63 is determined by the size of the end ring 2, and generally multiple rollers are evenly distributed circumferentially along the turntable 62. The outer wall shape of the support rollers 63 matches the inner wall shape of the end ring 2, allowing them to fit tightly against the inner wall and provide support from the inside. The outer surface of the support rollers 63 is a friction surface. To prevent slippage between the end ring 2 and the support rollers 63, the support rollers 63 can be selectively locked, ensuring that the end ring 2 rotates synchronously with the filter cylinder 3 under the influence of the support rollers 63.

For example, as shown in Figure 2, when the end ring 2 is mounted on the turntable 62 of the chuck 6, the inner wall of the end ring 2 contacts the support roller 63 on the turntable 62, and the support roller 63 provides support to the end ring 2 from the inside. During the welding process, the turntable 62 drives the end ring 2 to rotate. At this time, the support roller 63 rotates along with the end ring 2 under the frictional force of the end ring 2. The rotation direction of the support roller 63 is the same as the rotation direction of the end ring 2. The two have rolling friction, which has low frictional resistance and does not hinder the rotation of the end ring 2. The support roller 63 continuously applies a supporting force to the inner wall of the end ring 2 to prevent the end ring 2 from deforming due to external forces during rotation and welding.

The support roller 63 enhances the support effect on the end ring 2 from the inside, effectively resisting various external forces that may be generated during welding and preventing deformation of the end ring 2. This solves the problem of easy deformation of the end ring 2 affecting welding quality in the prior art. The rolling friction between the support roller 63 and the end ring 2 reduces wear on the inner wall of the end ring 2, ensuring the dimensional accuracy of the end ring 2. At the same time, the supporting effect of the support roller 63 keeps the end ring 2 in a stable shape and position during rotation, further improving the alignment accuracy with the part to be welded on the filter cylinder 3 and ensuring welding quality.

In some examples, the fixed disk 61 is circumferentially spaced with a number of connecting shafts 64, each connecting shaft 64 is provided with a first roller 71 and a second roller 72, and the connecting shaft 64, the first roller 71 and the second roller 72 rotate synchronously.

For example, as shown in Figure 7, when the chuck 6 is working, the fixed plate 61 remains stationary, while the connecting shaft 64 remains stationary along with the position of the fixed plate 61. However, during the rotation of the filter cylinder 3 and the end ring 2, because the first roller 71 presses against the outer wall of the end ring 2 and the second roller 72 presses against the outer wall of the filter cylinder 3, under the action of friction, the first roller 71 and the second roller 72 will rotate synchronously with the end ring 2 and the filter cylinder 3. At the same time, because they are sleeved on the connecting shaft 64 through bearings, the connecting shaft 64 will also rotate synchronously with the rotation of the first roller 71 and the second roller 72. Throughout the rotation process, the first roller 71 continuously applies pressure to the outer wall of the end ring 2, and the second roller 72 continuously applies pressure to the outer wall of the filter cylinder 3, achieving dynamic positioning of both and ensuring that the filter cylinder 3 and the end ring 2 always maintain the correct relative position during the welding process.

The structure in which the connecting shaft 64 drives the first roller 71 and the second roller 72 to rotate synchronously results in rolling friction between the rollers and the end ring 2 and the filter cylinder 3. This significantly reduces frictional damage to the outer walls of the end ring 2 and the filter cylinder 3, protecting the surface quality of the workpiece and extending the service life of the components. The continuous dynamic limiting effect ensures the stability of the relative position between the filter cylinder 3 and the end ring 2 during welding, avoiding welding deviations caused by relative sliding, and further improving the stability and reliability of the welding quality.

In some examples, the first roller 71 and the second roller 72 both have a tapered shaft hole 701 in the middle. The pressure roller group 7 also includes: a locking sleeve 73, with a through hole 74 opened in the axial direction inside the locking sleeve 73 for installing the connecting shaft 64; the outer wall of the locking sleeve 73 has two oppositely arranged oblique conical surfaces 75, which correspond one-to-one with the tapered shaft hole 701, and the oblique conical surfaces 75 gradually slope downward from the middle to the end of the outer wall of the locking sleeve 73; at least two pull rods 76 are provided, and the two ends of each pull rod 76 pass through the first roller 71 and the second roller 72 respectively, and the two ends of the pull rod 76 are threadedly connected to a locking nut 77.

For example, as shown in Figures 5 and 6, when installing the pressure roller assembly 7, first, the locking sleeve 73 is fitted onto the connecting shaft 64. Then, the first roller 71 and the second roller 72 are respectively fitted onto both sides of the locking sleeve 73, so that the tapered shaft holes 701 on the first roller 71 and the second roller 72 accurately fit with the inclined tapered surface 75 on the locking sleeve 73. Next, the two ends of the pull rod 76 are respectively passed through the first roller 71 and the second roller 72, and locking nuts 77 are screwed onto both ends of the pull rod 76. By tightening the locking nut 77, the pull rod 76 pulls the first roller 71 and the second roller 72 towards the middle of the locking sleeve 73. Under the action of the pulling force, the first roller 71 and the second roller 72 gradually approach each other along the inclined conical surface 75 of the locking sleeve 73. By utilizing the cooperation between the tapered shaft hole 701 and the inclined conical surface 75, the first roller 71 and the second roller 72 are firmly fixed in the required position, thereby realizing the adjustment of the position of the first roller 71 and the second roller 72.

The positions of the first roller 71 and the second roller 72 can be easily and quickly adjusted by the cooperation of the pull rod 76 and the locking nut 77, making them adaptable to end rings 2 and filter cylinders 3 of different diameters. This greatly improves the versatility and flexibility of the device, eliminating the need to replace the entire set of pressure rollers 7 for workpieces of different specifications, thus reducing production costs. The precise fit between the tapered shaft hole 701 and the inclined tapered surface 75 ensures that the first roller 71 and the second roller 72 are subjected to uniform force during the locking process, avoiding damage to components caused by excessive local stress. At the same time, it enhances the pressure effect on the end rings 2 and filter cylinders 3, solving the problem of poor limiting effect in the prior art and improving the stability of the welding process.

In some examples, the locking sleeve 73 has a necking groove 78. When the pull rod 76 pulls the first roller 71 and the second roller 72 to the middle of the locking sleeve 73 at the same time, the tapered shaft hole 701 can squeeze the necking groove 78 towards the shaft center, so that the necking groove 78 presses the connecting shaft 64.

For example, as shown in Figure 6, a necking groove 78 is provided on the locking sleeve 73. The necking groove 78 is opened along the axial direction of the locking sleeve 73 and penetrates the tube wall of the locking sleeve 73. This ensures that the locking sleeve 73 has sufficient elastic deformation space without affecting the overall strength of the locking sleeve 73. When the first roller 71 and the second roller 72 approach the middle of the locking sleeve 73 under the pulling force of the pull rod 76, the tapered shaft hole 701 on the first roller 71 and the second roller 72 will generate a compressive force in the axial direction on the inclined conical surface 75 on the locking sleeve 73. This compressive force will cause the locking sleeve 73 to undergo slight elastic deformation, resulting in the necking groove 78 shrinking.

When the first roller 71 and the second roller 72 are pulled to the middle of the locking sleeve 73 via the pull rod 76, an interaction force is generated between the tapered shaft hole 701 of the first roller 71 and the second roller 72 and the inclined conical surface 75 of the locking sleeve 73. The tapered shaft hole 701 applies a compressive force to the inclined conical surface 75 in the axial direction of the locking sleeve 73. Under the action of this compressive force, the tube wall of the locking sleeve 73 undergoes elastic deformation, and the width of the necking groove 78 decreases, that is, the necking groove 78 contracts. As the necking groove 78 contracts, the inner wall of the locking sleeve 73 gradually moves closer to the connecting shaft 64 and fits tightly against the outer wall of the connecting shaft 64, generating a large frictional force, thereby firmly fixing the locking sleeve 73 to the connecting shaft 64 and preventing relative sliding between the locking sleeve 73 and the connecting shaft 64.

The necking groove 78 utilizes the elastic deformation of the locking sleeve 73, making the fixation between the locking sleeve 73 and the connecting shaft 64 more secure and reliable. This effectively prevents relative slippage between the locking sleeve 73 and the connecting shaft 64 caused by vibration, impact, or other factors during welding, ensuring that the pressure roller assembly 7 maintains a stable working state. This robust fixing method further improves the limiting effect on the filter screen cylinder 3 and the end ring 2, avoiding welding deviations caused by component slippage, solving the welding quality problems caused by component slippage in the prior art, and improving the product qualification rate.

In some examples, the workbench 1 is also equipped with a hoisting and transfer mechanism 12, which includes: a fixed frame 1201 disposed on the workbench 1; a crossbeam 1202, one end of which is rotatably disposed on the fixed frame 1201, and the other end of which extends above the support cylinder 5; a mounting frame 1203 disposed on the other end of the crossbeam 1202, and a longitudinally arranged lead screw motor 1204 disposed on the mounting frame 1203; and an electric gripper 1205 disposed on the power output end of the lead screw motor 1204, which can approach the support cylinder 5 under the drive of the lead screw motor 1204 to remove the support cylinder 5 from the limiting seat 10.

The hoisting and transfer mechanism 12 features a frame structure for its fixed frame 1201, which is securely bolted to the workbench 1 at its bottom to prevent swaying during hoisting. The crossbeam 1202 is made of rectangular steel tubing, is lightweight and rigid, and one end is rotatably connected to the top of the fixed frame 1201 via a bearing, ensuring flexible rotation of the crossbeam 1202. The other end of the crossbeam 1202 has a mounting base at its bottom, and a mounting frame 1203 is bolted to the mounting base. The mounting frame 1203 is generally inverted L-shaped, with its horizontal portion fixed to the crossbeam 1202 and its longitudinal portion used to mount the lead screw motor 1204. The housing of the lead screw motor 1204 is fixed to the longitudinal portion of the mounting frame 1203 via a flange. The motor output shaft is connected to the lead screw via a coupling, and a nut seat is fitted onto the lead screw. The electric gripper 1205 is fixed to the nut seat via a connecting plate. The electric gripper 1205 has a two-finger structure. The gripping surface of the gripper is covered with an anti-slip rubber pad. The surface of the rubber pad has a textured surface, which increases the friction with the support cylinder 5 and prevents slippage during gripping. At the same time, the electric gripper 1205 is equipped with a pressure sensor, which can automatically adjust the gripping force according to the weight of the support cylinder 5, so as to avoid damage to the support cylinder 5 due to excessive gripping force or detachment of the support cylinder 5 due to insufficient gripping force.

When the support cylinder 5 needs to be replaced, the operator first activates the rotating mechanism of the crossbeam 1202 via the control button. The crossbeam 1202 rotates around the bearing on the fixed frame 1201, causing the electric gripper 1205 to move directly above the support cylinder 5. Next, the lead screw motor 1204 is activated, driving the lead screw to rotate. The nut seat moves downward along the lead screw, thereby causing the electric gripper 1205 to descend. When the electric gripper 1205 descends to a suitable height and the grippers are located on both sides of the support cylinder 5, the operator controls the electric gripper 1205 to close. The anti-slip rubber pads on the grippers are in close contact with the outer wall of the support cylinder 5. The pressure sensor monitors the clamping force in real time, ensuring that the closing stops after reaching the preset value.

It should be noted that when the electric gripper 1205 grips the support cylinder 5, it removes the support cylinder 5, the two fixed shafts 9, and the two chucks 6 simultaneously. This is because the fixed shafts 9 are penetrating the chucks 6 at this point. The operator then manually removes the chucks 6 and replaces the support cylinder 5. Before this, the operator must manually pull out the insertion rod 11 to prevent it from limiting the chucks 6. Subsequently, the lead screw motor 1204 reverses, causing the electric gripper 1205 to rise and remove the support cylinder 5 from the limiting seat 10. Afterward, the crossbeam 1202 is rotated again, transferring the support cylinder 5 to above the storage area. The lead screw motor 1204 then causes the electric gripper 1205 to descend, releasing the support cylinder 5 and placing it in the designated position. To install a new support cylinder 5, the reverse steps are followed.

The hoisting and transfer mechanism 12 enables mechanized transfer of the support cylinder 5, eliminating the need for manual handling of the heavy cylinder, significantly reducing the labor intensity of operators and preventing accidental injuries that may occur during manual handling. The flexible rotation of the crossbeam 1202 and the precise lifting of the lead screw motor 1204 allow the electric gripper 1205 to accurately align with the support cylinder 5, improving the accuracy and efficiency of the transfer. The anti-slip design and pressure sensor control of the electric gripper 1205 ensure the stability and safety of the support cylinder 5 during transfer, preventing it from falling and being damaged. The overall structure is easy to operate; the entire transfer process can be completed simply by pressing a button, effectively solving the problem of cumbersome operation when replacing the support cylinder 5 in existing technologies, shortening replacement time, and improving equipment productivity.

In some examples, a slide rail 13 is provided on the workbench 1 along its length, and a lifting top plate 14 is slidably arranged on the slide rail 13. The lifting top plate 14 can push the fixed shaft 9 of the support cylinder 5 out from the opening of the limit seat 10.

For example, as shown in Figure 1, the slide rails 13 on the worktable 1 are two parallel T-shaped groove slide rails 13, extending along the length of the worktable 1. Limit blocks are provided at both ends of the slide rails 13 to prevent the lifting top plate 14 from sliding off the slide rails 13. A slider that mates with the slide rails 13 is installed at the bottom of the lifting top plate 14, and the slider is embedded in the T-shaped groove to ensure smooth sliding of the lifting top plate 14 along the slide rails 13. A hydraulic lifting cylinder is installed at the top of the lifting top plate 14. The piston rod of the hydraulic cylinder has a circular top plate at its top, and the surface of the top plate is covered with a wear-resistant nylon pad to avoid direct rigid contact with the fixed shaft 9 of the support cylinder 5. The hydraulic lifting cylinder is connected to a hydraulic station through hydraulic lines, and an electromagnetic directional valve is installed on the lines to control the lifting action of the hydraulic cylinder. In addition, a position sensor is also provided on the lifting top plate 14, which can detect the relative position of the lifting top plate 14 and the limit seat 10 to ensure that the lifting top plate 14 moves accurately below the fixed shaft 9.

When it is necessary to push the fixed shaft 9 of the support cylinder 5 out of the limiting seat 10, the operator first drives the lifting top plate 14 to slide along the slide rail 13 through the control device. The position sensor provides real-time feedback on the position of the lifting top plate 14. When it moves directly below the fixed shaft 9, the lifting top plate 14 stops sliding. Then, the solenoid reversing valve is controlled to supply oil to the hydraulic lifting cylinder by the hydraulic station. The piston rod extends, driving the top plate to rise. After the top plate contacts the bottom of the fixed shaft 9 of the support cylinder 5, it continues to rise, pushing the fixed shaft 9 out of the opening of the limiting seat 10 until the fixed shaft 9 is completely separated from the limiting seat 10. At this time, the electric gripper 1205 can smoothly clamp the support cylinder 5 for transfer. After the transfer is completed, the piston rod of the hydraulic lifting cylinder retracts, driving the top plate to descend and reset. The lifting top plate 14 slides along the slide rail 13 to the initial position to wait for the next use.

The lifting top plate 14 solves the potential jamming problem between the fixed shaft 9 of the support cylinder 5 and the limiting seat 10, allowing the fixed shaft 9 to be easily ejected from the limiting seat 10. Combined with the hoisting and transfer mechanism 12, this further improves the ease of replacing the support cylinder 5. The guiding function of the slide rail 13 ensures the accuracy of the movement of the lifting top plate 14, and the application of the position sensor enables precise positioning of the lifting top plate 14, avoiding operational errors. The hydraulic lifting cylinder provides a stable and reliable ejection force, adapting to the ejection requirements of support cylinders 5 of different weights. The wear-resistant nylon pad on the top plate effectively protects the bottom of the fixed shaft 9 from damage. The overall structure is simple and practical, working in conjunction with the hoisting and transfer mechanism 12 to significantly improve the efficiency of supporting cylinder 5 replacement and reduce equipment downtime.

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims (4)

1. A laser welding device for filter processing for welding an end ring body (2) to a filter screen cylinder (3) to form a filter, characterized by comprising:

A work table (1);

The support cylinder (5) is rotatably arranged on the workbench (1) and is used for supporting the inner wall of the filter screen cylinder (3);

The two centering brackets (4) are symmetrically positioned at two ends of the supporting cylinder (5), a chuck (6) is arranged at one side of the centering brackets (4) adjacent to the supporting cylinder (5), the chuck (6) is used for installing the end ring body (2), a plurality of groups of circumferentially-spaced abutting roller sets (7) are rotationally connected to each chuck (6), and a welding area is formed between the two adjacent abutting roller sets (7);

Each abutting roller set (7) comprises a first roller (71) and a second roller (72) which are coaxially arranged, the first roller (71) is used for abutting against the outer wall of the end ring body (2), the second roller (72) is used for abutting against the outer wall of the filter screen cylinder (3), and the second roller (72) can be matched with the first roller (71) so as to enable the filter screen cylinder (3) and the end ring body (2) to be axially aligned;

one of the centering brackets (4) is provided with a driver, the driver is provided with an output shaft extending along the axial direction of the supporting cylinder (5), the other centering bracket (4) is provided with a bearing rod (8) extending along the axial direction of the supporting cylinder (5) in a sliding way, and the bearing rod (8) can slide along the axial direction to adjust the distance between the bearing rod and the output shaft of the driver;

one end of the supporting cylinder (5) is detachably connected with an output shaft of the driver, the other end of the supporting cylinder is detachably connected with the bearing rod (8), and the driver is used for driving the supporting cylinder (5) to rotate so as to drive the filter screen cylinder (3) to rotate;

The bearing rod (8) is provided with a limiting seat (10) with an upward opening, both end faces of the supporting cylinder (5) are provided with fixed shafts (9), the fixed shafts (9) and the supporting cylinder (5) are coaxially arranged, and the end part of the fixed shaft (9) adjacent to the bearing rod (8) is detachably arranged in the limiting seat (10) and is in running fit with the limiting seat (10);

The chuck (6) comprises:

The fixing disc (61), the jack (610) is arranged on the fixing disc (61), the inserting rod (11) is detachably arranged on the centering bracket (4), and the inserting rod (11) is in plug-in fit with the jack (610) so as to limit the circumferential rotation of the fixing disc (61);

The rotary table (62) is rotationally arranged on the fixed disc (61), the rotary table (62) and the fixed disc (61) are coaxially arranged, the rotary table (62) is used for being sleeved on the periphery of the fixed shaft (9), and the rotary table (62) can rotate along with the fixed shaft (9) to drive the end ring body (2) to rotate;

a plurality of supporting rollers (63) are arranged on the turntable (62), the supporting rollers (63) are arranged at intervals along the axial direction of the turntable (62), and the supporting rollers (63) are used for supporting the inner wall of the end ring body (2);

A plurality of circumferentially-spaced connecting shafts (64) are arranged on the fixed disc (61), a group of pressing roller sets (7) is sleeved on each connecting shaft (64), and the connecting shafts (64) can drive the first rollers (71) and the second rollers (72) of the pressing roller sets (7) to synchronously rotate;

the first roller (71) and the second roller (72) are provided with conical shaft holes (701) with openings arranged oppositely, and the pressing roller set (7) further comprises:

The locking sleeve (73) is provided with a through hole (74) for installing the connecting shaft (64), and two inclined conical surfaces (75) which are arranged in one-to-one correspondence with the conical shaft holes (701) are arranged on the outer wall of the locking sleeve (73);

The two ends of each pull rod (76) penetrate through the first roller (71) and the second roller (72) respectively, and locking nuts (77) are connected with the two ends of each pull rod (76) in a threaded mode and used for tensioning the first roller (71) and the second roller (72) in opposite directions.

2. The laser welding device for machining a filter according to claim 1, wherein a plurality of necking grooves (78) axially extending to the outer end of the locking sleeve (73) are formed in the peripheral wall of the locking sleeve (73) in a penetrating manner, and when the pull rod (76) simultaneously tightens the first roller (71) and the second roller (72) towards the middle of the locking sleeve (73), the necking grooves (78) are narrowed under the pressing action of the inner wall of the conical shaft hole (701) so that the locking sleeve (73) is pressed on the outer wall of the connecting shaft (64).

3. The laser welding device for filter processing according to claim 2, wherein the workbench (1) is further provided with a hoisting and transferring mechanism (12), and the hoisting and transferring mechanism (12) comprises:

the fixing frame (1201) is arranged on the workbench (1);

one end of the cross beam (1202) is rotatably arranged on the fixed frame (1201), and the other end of the cross beam extends to the upper part of the supporting cylinder (5);

The mounting frame (1203) is arranged at the other end of the cross beam (1202), and a screw motor (1204) which is longitudinally arranged is arranged on the mounting frame (1203);

The electric clamping jaw (1205) is connected with the power output end of the screw motor (1204), and the electric clamping jaw (1205) can move downwards to be close to the supporting cylinder (5) and clamp the supporting cylinder (5) under the drive of the screw motor (1204).

4. A laser welding device for filter processing according to claim 3, characterized in that the workbench (1) is provided with a sliding rail (13) extending along the axial direction of the supporting cylinder (5), the sliding rail (13) is provided with a lifting top plate (14) in a sliding manner, the lifting top plate (14) is provided with a lifting end, and the lifting end can push the fixed shaft (9) upwards, so that the fixed shaft (9) is moved out of the opening in the limiting seat (10).