Welding structure and welding process of metal fabric

Abstract

The application relates to the field of metal fabric welding processing, in particular to a welding structure and welding process of a metal fabric, which welds and fixes two opposite edge portions of the metal fabric, and sets clamping pieces outside the two edge portions, so that a clamping area is located on a side, away from a welding area, of a welding heat radiation area of the two edge portions, or the clamping area covers the welding heat radiation area of the two edge portions. When an alternating load of the metal fabric reaches the edge portions, the clamping effect of the clamping pieces directly absorbs the alternating load, thereby effectively avoiding that the welding heat radiation area of the edge portions directly bears the alternating load, reducing the possibility of the metal fabric being broken at the edge portions, and prolonging the service life of the metal fabric cylinder.

Description

Technical Field

[0001] This application relates to the field of metal fabric welding processing, and in particular to a welding structure and welding process for metal fabric. Background Technology

[0002] Metal fabrics refer to products formed by weaving and welding metal materials. They generally have good deformability. Depending on the different environments in which they are used, they may be further processed after forming by folding, cutting, bending, welding, or a combination of these processing methods.

[0003] For example, in the manufacturing process of metal fabric tubes, metal fabric cut at right angles is used as the base material. The metal fabric is first bent into a ring to form a hollow cylindrical part, and then the two adjacent edge areas of the metal fabric are welded and fixed to form a metal fabric tube.

[0004] This type of fabric tube can effectively resist dynamic loads and is often used as a filter cartridge in dust collectors. However, experiments have shown that when this fabric tube is used in dust collectors, the weld area still has weaknesses, and the fracture points mostly occur near the weld. This is mainly because the metal fabric tube needs to be subjected to continuous reverse impacts from the inside out during operation. The continuous alternating load applied to the weld area will lead to the fracture of adjacent metal fabric areas.

[0005] US Patent US09638615 discloses a method for manufacturing metal fabric and a hollow body made of metal fabric. The method involves welding metal strips over the adjacent areas of the metal fabric and filling the space between the metal strips and the fabric with an elastic material. This arrangement allows the alternating tension near the weld to be distributed over a larger surface area through the welded metal strip, thus extending the lifespan of the metal fabric mesh. However, this connection places extremely high demands on the welder. Because the additional clamping plates cover the adjacent areas of the metal fabric, the high deformability of the metal fabric makes it prone to incomplete welds due to insufficient adhesion between the metal fabric and the clamping plates. Furthermore, the thinness of the metal fabric necessitates precise control over welding temperature and duration. The clamping plates also obstruct the view, making accurate observation of the welding process difficult and compromising weld quality.

[0006] Therefore, it is still necessary to propose a new solution for connecting metal fabrics and improving their service life. Summary of the Invention

[0007] To address the problems mentioned in the background art and improve the service life of metal fabrics, this application provides a welding structure and welding process for metal fabrics.

[0008] In the first aspect, this application proposes a welded structure for metal fabric, employing the following technical solution: A welded structure for a metal fabric includes two welded edge portions and a clamping member for clamping and fixing the two edge portions, wherein the clamping area is located outside the welding heat radiation zone of the two edge portions. The clamping area may cover the welding heat radiation zone of the two edge portions.

[0009] By adopting the above technical solution, after welding the edge of the metal fabric, the welding heat radiation zone will directly damage the strength of the metal fabric. This welding heat radiation zone is the part of the metal fabric that mainly bears alternating loads. Therefore, the metal fabric breaks mainly in this welding heat radiation zone. However, this solution clamps the metal fabric with clamping components, so that the clamping area covers the welding heat radiation zone of the edge part, or the clamping area is located outside the welding heat radiation zone of the edge part. Therefore, when the alternating load reaches the edge part, the clamping action of the clamping components will directly absorb the alternating load, thereby effectively preventing the welding heat radiation zone of the edge part from directly bearing the alternating load, thus reducing the possibility of the metal fabric breaking at the edge part and extending the service life of the metal fabric tube.

[0010] A welded structure for a metal fabric includes two edge portions welded together, and two clamping tabs located on opposite sides of the edge portions. The welding areas of one side of each of the two clamping pieces and the two edge portions are fixed to each other; The two clamping plates are clamped to the two edge portions away from their fixed portions, and the clamping area covers the welding heat radiation zone of the two edge portions.

[0011] By adopting the above technical solution, during operation, after the edge parts are welded together, they are fixed to the outer edges of the two edge parts by clamping components. This first improves the connection strength of the edge parts, and then the two clamping plates are used to clamp the edge parts. Since the welding heat radiation zone generated by welding will directly damage the strength of the metal fabric, the metal fabric often breaks mainly in this welding heat radiation zone. However, this solution clamps the edge parts by clamping components and covers the welding heat radiation zone of the edge parts. The two clamping plates can absorb the alternating load, thereby effectively preventing the welding heat radiation zone of the edge parts from directly bearing the alternating load, thus protecting the weak parts of the metal fabric and extending the service life of the metal fabric.

[0012] A welded structure of a metal fabric includes two edge portions and two metal clamping pieces located on opposite sides of the edge portions. The two clamping pieces are welded and fixed to one side of each other and the outer side of the two edge portions. The portions of the two clamping plates opposite to their welding areas are clamped to the two edge portions, and the clamping area covers the welding heat radiation area of ​​the two edge portions.

[0013] By adopting the above technical solution, the sides of the two clamping plates are welded to the sides of the two edge portions to achieve mutual fixation. The clamping plates compensate for the low welding strength caused by the thinness and small contact area of ​​the metal fabric itself, thus ensuring the welding strength. In addition, since the welding part is located at the edge of the clamping plate and the metal fabric, the welding situation can be directly and accurately observed, avoiding problems such as excessive temperature and incomplete welding. It can also effectively control the welding area, thus minimizing the welding heat radiation zone caused by welding at the edge. This welding heat radiation zone is the part of the metal fabric that mainly bears alternating loads, and the metal fabric mainly breaks in this welding heat radiation zone. In this solution, the two clamping plates clamp the edge portion, so that the clamping area covers the welding heat radiation zone of the edge portion. The two clamping plates can also absorb the alternating load, thereby effectively preventing the welding heat radiation zone of the edge portion from directly bearing the alternating load, thus protecting the weak part of the metal fabric and extending the service life of the metal fabric.

[0014] Optionally, the clamping piece forms a transition arc surface on the side opposite to the welding area of ​​the two edge portions.

[0015] By adopting the above technical solution, the transition arc surface can avoid the clamping piece from generating shear force on the transition area between the edge and hollow part of the metal fabric, thereby further protecting the metal fabric.

[0016] Optionally, the outer sides of the corresponding clamping areas of the two clamping pieces are bent in opposite directions to form a bent portion.

[0017] By adopting the above technical solution, a bending portion is formed outside the clamping area corresponding to the clamping piece, which can effectively avoid the clamping piece generating shear force on the transition area between the edge of the metal fabric and the hollow component. Furthermore, due to the setting of the bending portion, the portion of the clamping piece located below the bending portion also limits the maximum curvature of the hollow portion, restricting the deformation of the hollow portion of the metal fabric within a controllable range. When the hollow portion of the metal fabric deforms, the portion of the clamping piece below the bending portion will first absorb the deformation force generated by the hollow portion of the metal fabric, thereby further reducing the alternating load transmitted to the edge of the metal fabric.

[0018] Optionally, the bending angle is 90°-120°.

[0019] By adopting the above technical solution, the curvature of the hollow part can be effectively limited, thereby reducing the probability of damage to the transition area between the edge of the metal fabric and the hollow part.

[0020] Optionally, the clamping piece and the edge portion are made of the same material.

[0021] By adopting the above technical solution, when welding and fixing, the clamping pieces and edge parts of the same material can achieve better welding quality, so as to ensure the connection strength between the clamping pieces and the edge parts.

[0022] Optionally, the thickness of the clamping piece shall not exceed three times the thickness of the edge portion.

[0023] By adopting the above technical solution, since the overall thickness of the metal webbing is relatively thin, it will be directly damaged if the heating time is too long or the temperature is too high. Therefore, controlling the thickness of the clamping piece can effectively control the heating temperature and heating time when the clamping piece is welded to the metal fabric. This can not only improve the welding quality between the edge of the metal webbing and the clamping piece, but also minimize the welding heat radiation zone generated in the welding part, thereby reducing the strength of the edge of the metal webbing.

[0024] Optionally, the two ends of the corresponding clamping areas of the two clamping pieces are fixed to each other.

[0025] By adopting the above technical solution, fixing the two ends of the corresponding clamping areas of the two clamping pieces can limit the relative position of the two clamping pieces, thereby ensuring the clamping force of the two clamping pieces, further protecting the welding heat radiation area in the edge part, and improving the service life of the metal fabric.

[0026] The second aspect of this application also provides a welding process for metal webbing, employing the following technical solution: A welding process for metal fabrics includes the following steps: Two opposite edge portions of the metal fabric are welded and fixed, and clamping members are provided on the outside of the two edge portions so that the clamping area is outside the welding heat radiation area of ​​the two edge portions, or the clamping area covers the welding heat radiation area of ​​the two edge portions.

[0027] By adopting the above technical solution, after welding the edge of the metal fabric, the welding heat radiation zone will directly damage the strength of the metal fabric. This welding heat radiation zone is the part of the metal fabric that mainly bears alternating loads. Therefore, the metal fabric often breaks mainly in this welding heat radiation zone. However, this solution clamps the metal fabric with clamping components, so that the clamping area covers the welding heat radiation zone of the edge part, or the clamping area is located outside the welding heat radiation zone of the edge part. Therefore, when the alternating load reaches the edge part, the clamping action of the clamping components will directly absorb the alternating load, thereby effectively preventing the welding heat radiation zone of the edge part from directly bearing the alternating load, thus reducing the possibility of the metal fabric breaking at the edge part and extending the service life of the metal fabric tube.

[0028] A welding process for metal fabrics includes the following steps; Weld the two edge portions of the metal fabric together. Clamping pieces are provided on the opposite sides of the two edge portions; Fix one side of each of the two clamping pieces to the welding area of ​​the two edge portions; The portion of the two clamping plates away from the welding area is squeezed and clamped to the two edges, so that the clamping area completely covers the welding heat radiation area of ​​the edge portion.

[0029] By adopting the above technical solution, during operation, after the edge parts are welded together, they are fixed to the outer edges of the two edge parts by clamping members. This first improves the connection strength of the edge parts, and then the two clamping pieces are used to clamp the edge parts. Since the welding heat radiation zone generated by welding will directly damage the strength of the metal fabric, and this welding heat radiation zone is the part of the metal fabric that mainly bears alternating loads, the metal fabric often breaks mainly in this welding heat radiation zone. However, this solution clamps the edge parts by clamping members and makes the clamping area cover the welding heat radiation zone of the edge parts. The alternating load can be absorbed by the two clamping pieces, thereby effectively preventing the welding heat radiation zone of the edge parts from directly bearing the alternating load, thus protecting the weak parts of the metal fabric and extending the service life of the metal fabric.

[0030] A welding process for metal fabrics includes the following steps: Two metal clamping pieces are attached to the outer sides of the two mutually abutting edge portions of the metal fabric; Weld one side of the two clamping pieces to the outer side of the two edge portions to fix them in place; The two clamping plates are squeezed to the part away from the welding area and clamped to the two edge parts, so that the clamping area completely covers the welding heat radiation area of ​​the edge parts.

[0031] By adopting the above technical solution, the sides of the two clamping plates are welded to the sides of the two edge portions to achieve mutual fixation. The clamping plates compensate for the low welding strength caused by the thinness and small contact area of ​​the metal fabric itself, thus ensuring the welding strength. In addition, since the welding part is located at the edge of the clamping plate and the metal fabric, the welding situation can be directly and accurately observed, avoiding problems such as excessive temperature and incomplete welding. It can also effectively control the welding area, thus minimizing the welding heat radiation zone caused by the edge welding. This welding heat radiation zone is the part of the metal fabric that mainly bears alternating loads. Therefore, the metal fabric often breaks mainly in this welding heat radiation zone. In this solution, the two clamping plates clamp the edge portion, so that the clamping area covers the welding heat radiation zone of the edge portion. The two clamping plates can also absorb the alternating load, thereby effectively preventing the welding heat radiation zone of the edge portion from directly bearing the alternating load, thus protecting the weak part of the metal fabric and extending the service life of the metal fabric.

[0032] Optionally, the two opposite edge portions of the metal fabric are fixed relative to each other before the clamping piece is attached to the outside of the two edge portions.

[0033] By adopting the above technical solution, the positioning accuracy of the edge part of the metal fabric can be guaranteed when welding with the clamping piece, avoiding relative movement of the edge part of the metal fabric and ensuring welding quality.

[0034] Optionally, the portions of both clamping plates facing away from their welding areas are both configured as transition arc surfaces.

[0035] By adopting the above technical solution, the transition arc surface can reduce the shear stress generated below the welding heat radiation zone of the edge part of the clamping piece, that is, the transition area between the edge part of the metal fabric and the hollow part, thereby reducing the probability of damage to the metal fabric.

[0036] Optionally, both clamping pieces are bent pieces. After one side of the bent portion of the two clamping pieces is clamped to the two edge portions, the other side of the corresponding bent portion of the two clamping pieces is located outside the welding heat radiation zone and abuts against the metal fabric.

[0037] By adopting the above technical solution and using a bent clamping piece, it is possible to effectively avoid the clamping piece generating shear force on the transition area between the edge of the metal fabric and the hollow component. Furthermore, due to the bent clamping piece, the portion of the clamping piece located below the bend also limits the maximum curvature of the hollow component, restricting the deformation of the hollow component of the metal fabric within a controllable range. When the hollow component of the metal fabric deforms, the portion of the clamping piece below the bend will first absorb the deformation force generated by the hollow component of the metal fabric, thereby further reducing the alternating load transmitted to the edge of the metal fabric.

[0038] Optionally, the bending angle of the clamping piece is 90°-120°.

[0039] By adopting the above technical solution, the curvature of the hollow part can be effectively limited, reducing the probability of damage to the transition area between the edge of the metal fabric and the hollow part.

[0040] Optionally, the clamping tabs are made of the same material as the metal webbing.

[0041] By adopting the above technical solution, when welding and fixing, the clamping pieces and edge parts of the same material can achieve better welding quality, so as to ensure the connection strength between the clamping pieces and the edge parts.

[0042] Optionally, the thickness of the clamping piece shall not exceed three times the thickness of the metal webbing.

[0043] By adopting the above technical solution, since the overall thickness of the metal webbing is relatively thin, it will be directly damaged if the heating time is too long or the temperature is too high. Therefore, controlling the thickness of the clamping piece can effectively control the heating temperature and heating time when the clamping piece is welded to the metal fabric. This can not only improve the welding quality between the edge of the metal webbing and the clamping piece, but also minimize the welding heat radiation zone generated in the welding part, thereby reducing the strength of the edge of the metal webbing.

[0044] In summary, this application includes at least one of the following beneficial technical effects: 1. After welding the edge of the metal fabric, the welding heat radiation zone will directly damage the strength of the metal fabric. This welding heat radiation zone is also the part of the metal fabric that mainly bears alternating loads. Therefore, the metal fabric often breaks mainly in this welding heat radiation zone. This solution uses clamping components to clamp the metal fabric, so that the clamping area covers the welding heat radiation zone of the edge part, or the clamping area is located outside the welding heat radiation zone of the edge part. Therefore, when the alternating load reaches the edge part, the clamping action of the clamping components will directly absorb the alternating load, thereby effectively preventing the welding heat radiation zone of the edge part from directly bearing the alternating load, thus reducing the possibility of the metal fabric breaking at the edge part and extending the service life of the metal fabric tube.

[0045] 2. The two clamping plates are welded to the sides of the two edge portions to achieve mutual fixation. The clamping plates compensate for the low welding strength caused by the thinness of the metal fabric and the small contact area, thus ensuring welding strength. In addition, since the welding part is located at the edge of the clamping plate and the metal fabric, the welding situation can be directly and accurately observed, avoiding problems such as excessive temperature and incomplete welding. The welding area can be effectively controlled, which can minimize the welding heat radiation zone caused by welding at the edge. This welding heat radiation zone is the part of the metal fabric that mainly bears alternating loads. In this solution, the two clamping plates clamp the edge portion, so that the clamping area covers the welding heat radiation zone of the edge portion. The two clamping plates can also absorb the alternating load, thereby effectively preventing the welding heat radiation zone of the edge portion from directly bearing the alternating load, thus protecting the weak part of the metal fabric and extending the service life of the metal fabric. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the structure of a welded structure of a metal fabric in Embodiment 1 of this application; Figure 2 This is a schematic diagram of the structure of a welded structure of a metal fabric in Embodiment 2 of this application; Figure 3 This is a schematic diagram of one embodiment of a welded structure for a metal fabric according to this application; Figure 4 This is a schematic diagram of another embodiment of a welded structure for a metal fabric in this application; Figure 5 This is a schematic flowchart of an embodiment 1 of a welding process for metal fabrics according to this application; Figure 6 This is a schematic flowchart of an embodiment 2 of the welding process for metal fabrics according to this application; Figure 7 This is a schematic flowchart of one embodiment of a welding process for metal fabrics according to this application. Figure 8 This is a schematic flowchart of another embodiment of the welding process for metal fabrics in this application; Explanation of reference numerals in the attached drawings: 1. Edge portion; 2. Clamping component; 21. Clamping piece; 22. Transition arc surface; 23. Bending section; 3. Hollow body part. Detailed Implementation

[0047] The first aspect of this application discloses a welding structure for metal fabrics, used to improve the service life of metal fabrics. Further detailed description is provided below with reference to the accompanying drawings.

[0048] Example 1 Photographs Figure 1 A welded structure for metal fabric includes two edge portions 1 of metal fabric, which are welded together and fixed. A clamping member 2 is provided on the outside of the edge portion 1 of the metal fabric for clamping and fixing the edge portion 1 of the metal fabric.

[0049] The clamping area of ​​the clamping member 2 can be set to be located on the side of the welding heat radiation area of ​​the two edge portions 1 away from its welding area, for the purpose of protecting the welding heat radiation area of ​​the edge portions 1.

[0050] The clamping component 2 can be configured with different structures according to different design requirements, which can achieve the clamping and fixing of the metal fabric.

[0051] The implementation principle of this embodiment is as follows: After welding the edge portion 1 of the metal fabric, the welding heat radiation zone will directly damage the strength of the metal fabric. This welding heat radiation zone is the part of the metal fabric that mainly bears alternating loads. Therefore, the metal fabric often breaks mainly in this welding heat radiation zone. In this solution, the clamping member 2 clamps the metal fabric, so that the clamping area is outside the welding heat radiation zone of the edge portion 1. Therefore, when the alternating load reaches the edge portion 1, the clamping action of the clamping member 2 will directly absorb the alternating load, thereby effectively preventing the welding heat radiation zone of the edge portion 1 from directly bearing the alternating load, thereby reducing the possibility of the metal fabric breaking at the edge portion 1 and extending the service life of the metal fabric tube.

[0052] As the main application scenario, the metal fabric sleeve with this welding process is used to fit the candle filter element. Through this setting of the metal fabric edge part 1, the metal fabric can be tightly attached to the peripheral wall of each candle filter element by tension, avoiding any vibration during operation. In addition, after each production run, it can be readjusted to ensure that the metal fabric sleeve is tightly fitted on the outside of the candle filter element. When it is necessary to disassemble and assemble, this setting of the metal fabric edge part 1 can also effectively protect the metal fabric.

[0053] Example 2: Reference Figure 2 A welding structure for metal fabric, which differs from Embodiment 1, is provided in that the clamping area of ​​the clamping member 2 covers the welding heat radiation area of ​​the edge portion 1. That is, the clamping member 2 protects the welding heat radiation area from bending and can also absorb the alternating load transmitted to the welding heat radiation area of ​​the edge portion 1, thereby improving the service life of the edge portion 1.

[0054] Furthermore, in order to improve the connection strength of the edge portion 1 and compensate for the problem of low welding strength caused by the thinness of the metal webbing, in this embodiment, the clamping member 2 adopts two clamping pieces 21. The two clamping pieces 21 are clamped on the outside of the edge portion 1 of the metal fabric and fixed to each other in the welding area of ​​the two edge portions 1, thereby further improving the connection strength of the edge portion 1.

[0055] Specifically, the clamping piece 21 can be made of high-strength rigid material and can be fixed directly by means of bolts, adhesives, or other methods.

[0056] Furthermore, the clamping piece 21 can also be made of a rigid polymer material, such as plastic. After the two clamping pieces 21 are fixed relative to each other by heating and melting, the welding area of ​​the metal fabric can be wrapped between the two clamping pieces 21, thereby achieving the effect of strengthening the welding area of ​​the edge part 1.

[0057] The implementation principle of this application is as follows: During operation, after the edge portions 1 are welded together, they are fixed to the outer edges of the two edge portions 1 by clamping members 2. First, the connection strength of the edge portions 1 is improved. Then, the two clamping pieces 21 are clamped to the edge portions 1 so that the clamping area covers the welding heat radiation area of ​​the edge portions 1. The alternating load can be absorbed by the two clamping pieces 21, thereby effectively preventing the welding heat radiation area of ​​the edge portions 1 from directly bearing the alternating load, thus protecting the weak part of the metal fabric and extending the service life of the metal fabric.

[0058] Example 3, Reference Figure 3 A welded structure for a metal fabric includes two edge portions 1 of the metal fabric and two metal clamping pieces 21, wherein the two clamping pieces 21 are located on opposite sides of the two edge portions 1, and one side of the two clamping pieces 21 is welded and fixed to the outer side of the two edge portions 1.

[0059] The portions of the two clamping pieces 21 that are away from their welding areas are clamped to the two edge portions 1 of the metal webbing, and the clamping area covers the welding heat radiation area of ​​the two edge portions 1.

[0060] In this way, the two clamping pieces 21 are welded to the two edge portions 1 to fix each other. The clamping pieces 21 compensate for the low welding strength caused by the thinness of the metal fabric and the small contact area, thus ensuring the welding strength. In addition, since the welding part is located between the clamping pieces 21 and the edge portion 1 of the metal fabric, the welding situation can be observed directly and accurately, avoiding the problems of excessive temperature and incomplete welding. The welding area can also be effectively controlled, which can minimize the welding heat radiation zone caused by the welding of the edge portion 1. This welding heat radiation zone is the part of the metal fabric that mainly bears the alternating load. In this solution, the two clamping pieces 21 clamp the edge portion 1, so that the clamping area covers the welding heat radiation zone of the edge portion 1. The two clamping pieces 21 can also absorb the alternating load, thereby effectively preventing the welding heat radiation zone of the edge portion 1 from directly bearing the alternating load, thus protecting the weak part of the metal fabric and extending the service life of the metal fabric.

[0061] Furthermore, the side of the clamping piece 21 opposite to the welding area of ​​the two edge portions 1 is formed with a transition arc surface 22. The transition arc surface 22 is used to avoid the clamping piece 21 exerting shear force on the transition area between the edge portion 1 of the metal fabric and the hollow body portion 3, thereby further protecting the metal fabric.

[0062] Reference Figure 4In addition, in other embodiments of this application, pre-bent clamping pieces 21 can also be used, that is, the two clamping pieces 21 are bent in opposite directions outside the corresponding clamping areas to form a bent portion 23. In a preferred embodiment of this application, the angle of the bent portion 23 is in the range of 90°-120°.

[0063] By adopting this scheme, a bend 23 is formed outside the clamping area corresponding to the clamping piece 21, which can also effectively prevent the clamping piece 21 from generating shear force on the transition area between the metal fabric edge portion 1 and the hollow component. At the same time, due to the setting of the bend 23, the portion of the clamping piece 21 located below the bend 23 also limits the maximum curvature of the hollow portion, limiting the deformation of the hollow portion of the metal fabric within a controllable range. When the hollow portion of the metal fabric deforms, the portion of the clamping piece 21 below the bend 23 will first absorb the deformation force generated by the hollow portion of the metal fabric, thereby further reducing the alternating load transmitted to the metal fabric edge portion 1.

[0064] Furthermore, to improve welding quality, the clamping piece 21 can be made of the same material as the metal webbing. The thickness of the clamping piece 21 varies with the thickness of the edge portion 1 of the metal webbing. When the thickness of the clamping piece is the same as the thickness of the edge portion 1 of the metal webbing, the welding temperature of the clamping piece 21 is essentially the same as the welding temperature of the edge portion 1 of the metal webbing. In the preferred embodiment of the application, it is preferable that the thickness of the clamping piece 21 does not exceed twice the thickness of the edge portion 1 of the metal webbing.

[0065] Thus, when welding and fixing, the clamping piece 21 and the edge portion 1 of the same material can achieve better welding quality. Since the overall thickness of the metal webbing is relatively thin, if the heating time is too long or the temperature is too high, the metal webbing will be directly damaged. Therefore, controlling the thickness of the clamping piece 21 can effectively control the heating temperature and heating time when welding the clamping piece 21 and the metal fabric. This can not only improve the welding quality between the edge portion 1 of the metal webbing and the metal piece, but also minimize the welding heat radiation zone generated in the welding part, thereby reducing the strength of the edge portion 1 of the metal webbing.

[0066] In other embodiments of this application, the two ends of the corresponding clamping areas of the two clamping pieces 21 can also be fixed to each other. This limits the relative position of the two clamping pieces 21, thereby ensuring the clamping force of the two clamping pieces 21, further protecting the welding heat radiation area within the edge portion 1, and improving the service life of the metal fabric.

[0067] The second aspect of this application discloses a welding process for metal fabrics to improve their service life. The following detailed description is provided in conjunction with the accompanying drawings.

[0068] Example 1, Reference Figure 5A welding process for metal fabrics includes the following steps: The metal fabric is rolled up to form a ring-shaped hollow body part 3 and two edge parts 1 located on both sides of the hollow body part 3, and the two edge parts 1 of the metal fabric are welded together to fix them. Determine the welding heat radiation zone of the two edge portions 1, select clamping parts 2, clamp and fix them to the two edge portions 1, so that the clamping area is located on the side of the welding heat radiation zone of the edge portions 1 away from the welding zone of the two edge portions 1.

[0069] The implementation principle of this embodiment is as follows: After the welding of the edge portion 1 of the metal fabric is completed, the welding heat radiation zone will directly damage the strength of the metal fabric. This welding heat radiation zone is the part of the metal fabric that mainly bears the alternating load. In this solution, the metal fabric is clamped by the clamping member 2. The clamping area is located outside the welding heat radiation zone of the edge portion 1. Therefore, when the alternating load reaches the edge portion 1, the alternating load will be directly absorbed by the clamping action of the clamping member 2, thereby effectively preventing the welding heat radiation zone of the edge portion 1 from directly bearing the alternating load. This reduces the possibility of the metal fabric breaking at the edge portion 1 and extends the service life of the metal fabric tube.

[0070] When the metal fabric sleeve treated with this welding process is used with the candle filter element, the metal fabric edge portion 1 can be designed to allow the metal fabric to adhere tightly to the peripheral wall of each candle filter element under tension, avoiding any vibration during operation. In addition, after each production run, it can be readjusted to ensure that the metal fabric sleeve is tightly fitted to the outside of the candle filter element. When disassembly and assembly are required, this design of the metal fabric edge portion 1 can also effectively protect the metal fabric.

[0071] Example 2, Reference Figure 6 A welding process for metal fabrics includes the following steps: The metal fabric is rolled up to form a ring-shaped hollow body 3 and two edge parts 1 located on both sides of the hollow body, and the two edge parts 1 of the metal fabric are welded together to fix them. Determine the welding heat radiation zone of the two edge portions 1, select clamping parts 2, clamp and fix them to the two edge portions 1, so that the clamping area covers the welding heat radiation zone of the two edge portions 1.

[0072] This solution covers and protects the welding heat radiation zone of the edge portion 1. When the alternating load reaches the edge portion 1, the clamping action of the clamping member 2 can also directly absorb the alternating load, thereby effectively preventing the welding heat radiation zone of the edge portion 1 from directly bearing the alternating load, reducing the possibility of the metal fabric breaking at the edge portion 1, and extending the service life of the metal fabric tube.

[0073] Furthermore, in order to improve the connection strength of the edge portion 1 and compensate for the problem of low welding strength caused by the thinness of the metal webbing, in this embodiment, the clamping member 2 can be two clamping pieces 21.

[0074] When using clamping piece 21 to clamp and fix the two edge portions 1, the following steps are adopted: Two clamping pieces 21 are attached to the outer sides of the two edge portions 1 of the metal fabric, and one side of the two clamping pieces 21 is fixed to the welding area of ​​the edge portion 1. Squeeze the two clamping pieces 21 away from their fixed side, so that the two clamping pieces 21 are clamped to the edge portion 1 of the metal fabric, and the clamping area of ​​the clamping pieces 21 covers the welding heat radiation area of ​​the edge portion 1.

[0075] Thus, after the edge portions 1 are welded together, they are fixed to the outer edges of the two edge portions 1 by the two clamping pieces 21, which can improve the connection strength of the edge portions 1, make up for the problem of low welding strength caused by the metal fabric itself being too thin and having very few contact surfaces, and improve the connection strength of the metal fabric.

[0076] Furthermore, the clamping piece 21 may also be made of a rigid polymer material, such as plastic.

[0077] In the step of fixing the two clamping pieces 21 to the welding area of ​​the edge portion 1, the fixing part of the two clamping pieces 21 is heated and melted, and then the welding area of ​​the metal fabric is wrapped between the two clamping pieces 21 to achieve relative fixation of the two clamping pieces 21 and reinforcement of the welding area of ​​the edge portion 1, so as to improve the connection strength of the metal fabric.

[0078] Example 3, Reference Figure 7 A welding process for metal fabrics includes the following steps: The metal fabric is rolled up to form a ring-shaped hollow body 3 and two edge parts 1 on both sides of the hollow body. The two edge parts 1 of the metal fabric are temporarily fixed by means of connection such as spot welding or gluing to ensure the relative positioning of the two edge parts 1 of the metal fabric and to prevent the two edge parts 1 of the metal fabric from separating or shifting before subsequent operations. Two metal clamping pieces 21 are selected. The material of the clamping pieces 21 is preferably the same metal as the metal fabric. The thickness of the clamping pieces 21 varies with the thickness of the edge portion 1 of the metal fabric. When the thickness of the clamping pieces 21 is the same as the thickness of the edge portion 1 of the metal fabric, the welding temperature of the clamping pieces 21 is essentially the same as the welding temperature of the edge portion 1 of the metal fabric. In the preferred embodiment, the thickness of the clamping pieces 21 is preferably no more than three times the thickness of the edge portion 1 of the metal webbing. Then, the two clamping pieces 21 are attached to the opposite sides of the two edge portions 1 along the extending direction of the edge portion 1. The relative positions of the two clamping pieces 21 and the edge portion 1 of the metal fabric are adjusted to ensure that the outer edge of the edge portion 1 can be exposed between the two clamping pieces 21, or that the outer edge of the edge portion 1 can protrude in front of the two clamping pieces 21, and then the relative positions of the two clamping pieces 21 are clamped and fixed. Weld the outer edges of the two clamping pieces 21 to the outer edges of the edge portion 1 to ensure the fixation of the edge portion 1 to the two metal pieces. The welding of the clamping pieces 21 to the edge portion 1 of the metal webbing is preferably done by argon arc welding. Release the clamping plates 21, determine the welding heat radiation zone of the edge portion 1, squeeze the two clamping plates 21, so that the two clamping plates 21 tend to clamp the welding heat radiation zone of the metal strip in a similar direction, complete the determination of the relative position of the two clamping plates 21, and make the clamping area of ​​the two clamping plates 21 cover the welding heat radiation zone of the edge portion 1.

[0079] In summary, by welding the sides of the two clamping plates 21 to the sides of the two edge portions 1, mutual fixation is achieved. The clamping plates 21 compensate for the low welding strength caused by the thinness and limited contact area of ​​the metal fabric, ensuring welding strength. Furthermore, since the welding part is located at the edge portion 1 between the clamping plates 21 and the metal fabric, the welding situation can be observed directly and accurately. By using clamping plates 21 made of the same material as the metal fabric and controlling the thickness of the clamping plates 21, the welding time and welding temperature can be easily controlled, ensuring the welding quality of the metal fabric. This also minimizes the welding heat radiation zone caused by welding at the edge portion 1, reducing the weak part of the metal fabric. In this solution, the two clamping plates 21 clamp the edge portion 1, covering the welding heat radiation zone of the edge portion 1. The two clamping plates 21 can also absorb alternating loads, effectively preventing the welding heat radiation zone of the edge portion 1 from directly bearing alternating loads, thereby protecting the weak part of the metal fabric and extending its service life.

[0080] Furthermore, when selecting two clamping pieces 21, one side of the two clamping pieces 21 can be pre-treated as a transition arc surface 22. When welding and fixing the two clamping pieces 21, the sides of the two clamping pieces 21 that are away from the transition arc surface 22 are fixed and welded to each other. At the same time, the two clamping pieces are clamped to the edge portion 1, and after covering the welding heat radiation area of ​​the edge portion 1, the transition arc surface 22 of the clamping piece 21 will abut against the transition area between the hollow part 3 of the metal fabric and the transition part.

[0081] Thus, by setting the transition arc surface 22, the shear stress generated by the clamping piece 21 on the area below the welding heat radiation zone of the edge portion 1, that is, the transition area between the metal fabric edge portion 1 and the hollow portion, can be reduced, thereby reducing the probability of damage to the metal fabric.

[0082] Reference Figure 8 In other embodiments of the application, when selecting the clamping piece 21, it can be bent at a predetermined angle in advance to form a bent piece. In the preferred embodiment of this application, the bending angle of the clamping piece is in the range of 90-120°. After welding one side of the clamping piece 21 to the edge portion 1 of the metal fabric, when clamping the clamping piece 21, one side of the bent portion 23 of the two clamping pieces 21 is clamped to the two edge portions 1, and the other side of the two clamping pieces 21 corresponding to the bent portion 23 is located outside the welding heat radiation zone and abuts against the metal fabric.

[0083] By using a bent clamping piece 21, the shearing force generated by the clamping piece 21 on the transition area between the edge portion 1 of the metal fabric and the hollow component can be effectively avoided. Due to the bent clamping piece 21, the portion of the clamping piece 21 below the bent portion 23 also limits the maximum curvature of the hollow portion, restricting the deformation of the hollow portion of the metal fabric within a controllable range. When the hollow portion of the metal fabric deforms, the portion of the clamping piece 21 below the bent portion 23 will first absorb the deformation force generated by the hollow portion of the metal fabric, thereby further reducing the alternating load transmitted to the edge portion 1 of the metal fabric.

[0084] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A welded structure for metal fabric, characterized in that: It includes two edge portions (1) and two metal clamping pieces (21) located on the opposite side of the edge portions (1); Among them, one side of the two clamping pieces (21) is welded and fixed to the outer side of the two edge portions (1); The portions of the two clamping pieces (21) facing away from their welding area are clamped to the two edge portions (1), and the clamping area covers the welding heat radiation area of ​​the two edge portions (1); The clamping piece (21) forms a transition arc surface (22) on the side away from the welding area of ​​the two edge portions (1); The two clamping pieces (21) are bent away from each other in the corresponding clamping area to form a bent portion (23); The clamping piece (21) and the edge portion (1) are made of the same material; The thickness of the clamping piece (21) shall not exceed three times the thickness of the edge portion (1); The angle of the bending portion (23) is 90°-120°; The two clamping plates (21) are fixed to each other at their respective clamping areas.

2. A welding process for metal fabrics, characterized in that: Includes the following steps: Two metal clamping pieces (21) are attached to the outside of the two mutually abutting edge portions (1) of the metal fabric; Weld one side of the two clamping pieces (21) to the outer side of the two edge portions (1) for fixation; The two clamping pieces (21) are squeezed away from the welding area and clamped to the two edge parts (1) so that the clamping area completely covers the welding heat radiation area of ​​the edge parts (1); The portions of the two clamping pieces (21) that are away from their welding areas are both set as transition arc surfaces (22); Both clamping pieces (21) are bent pieces, and one side of the bent part (23) of the two clamping pieces (21) is clamped to the two edge parts (1); The other side of the two clamping pieces (21) corresponding to the bent part (23) is located outside the welding heat radiation zone and abuts against the metal fabric; The clamping piece (21) is made of the same material as the metal webbing; The thickness of the clamping piece (21) shall not exceed three times the thickness of the metal webbing; Before attaching the clamping piece (21) to the outside of the two edge portions (1), fix the two opposite edge portions (1) of the metal fabric relative to each other; The bending angle of the clamping piece (21) is 90°-120°.

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