A welding method for an ultra-thin titanium mesh plate

Abstract

The application provides a welding method of an ultrathin titanium mesh plate, and comprises the following operation steps: S1: tooling design, tooling is designed according to the size of the titanium mesh plate; S2: titanium mesh plate and titanium strip are placed; S3: laser welding parameters are set; welding is carried out by using a single motor scanning swing laser welding machine, and the set parameters include output power, scanning speed and scanning width; and S4: welding is carried out by using a laser welding gun, and the welding gun moving speed is matched with the welding machine scanning speed. The welding method of the ultrathin titanium mesh plate is used for laser welding of 1.0-2.0 mm ultrathin titanium mesh plates, and the characteristics of the ultrathin titanium mesh, such as easy deformation, easy oxidation and point contact, are considered, welding strength of the ultrathin titanium mesh plate is high, deformation is small, and oxidation-free welding is realized by tooling design and reasonable laser welding parameter setting. Meanwhile, by using the single motor scanning swing laser welding machine, the equipment and process are simple, the production efficiency is high, and batch production can be realized.

Description

Technical Field

[0001] This invention relates to the field of non-ferrous metal processing technology, and in particular to a welding method for ultra-thin titanium mesh. Background Technology

[0002] Titanium mesh, as a deep-processed material of titanium and titanium alloys, possesses characteristics such as acid resistance, alkali resistance, and high temperature resistance, and is widely used in screening and filtration under acidic and alkaline conditions, as well as in the filtration of gases and liquids and the separation of other media. Mesh stretching is the mainstream forming method for titanium mesh production, characterized by low loss, low cost, and high efficiency. However, because the titanium matrix needs to be stretched and deformed during processing, it is impossible to pre-install metal frames according to the design dimensions. When the titanium mesh requires support on all four sides, it is necessary to reconnect the metal frame edges around the perimeter. Welding is an effective method to ensure the rigidity, strength, and reliability of the connection. Titanium and titanium alloys have good weldability, and commonly used welding methods include tungsten inert gas welding (TIG) and gas metal arc welding (GMAW).

[0003] As is well known, the thickness of expanded titanium mesh is generally between 1.0 and 2.0 mm, which is extremely thin. Furthermore, the butt welding of titanium mesh and metal plate is a point contact, making the welding extremely difficult. Tungsten inert gas welding and gas metal arc welding are prone to defects such as perforation, wire breakage, and deformation due to the large heat input.

[0004] In recent years, with the continuous expansion of the applications of titanium mesh, various working conditions have become increasingly complex, and the requirements for welding methods have become increasingly stringent. Those skilled in the art urgently need a welding process for ultra-thin titanium mesh plates to achieve reliable welding of ultra-thin titanium mesh. Summary of the Invention

[0005] In view of this, the present invention aims to propose a welding method for ultra-thin titanium mesh plates to solve the problems of the relatively simple titanium mesh connection process in the prior art, and the defects such as perforation, wire melting and deformation that are prone to occur during the butt welding of titanium mesh and metal plates.

[0006] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0007] A welding method for ultrathin titanium mesh plates includes the following steps:

[0008] S1: Tooling design. The tooling is designed according to the size of the titanium mesh plate. The main materials of the tooling are steel plate and conductive copper plate. The conductive copper plate is set above the steel plate and is arranged in an enclosing shape. A recessed groove for accommodating the titanium mesh plate is formed on the conductive copper plate.

[0009] S2: Placement of titanium mesh and titanium strips; After the tooling is installed and placed, place the titanium mesh and titanium strips on the tooling, wherein the titanium mesh is placed in the recessed groove on the conductive copper plate, the titanium strips are placed on the conductive copper plate, and the titanium strips are mated and attached to the titanium mesh.

[0010] S3: Set laser welding parameters; Welding is performed using a single-motor scanning oscillating laser welder. The laser welding parameters set include output power, scanning speed, and scanning width.

[0011] S4: Welding; Welding is performed using a laser welding torch, with the torch moving at a speed matched to the welding machine scanning speed.

[0012] Furthermore, in step S1, the dimensions of the titanium mesh plate are T*W*L, where T is the thickness of 1.0 to 2.0 mm, W is the width, and L is the length. The sinking depth of the grooves on the conductive copper plate is the same as the thickness T of the titanium mesh plate. The dimensions of the titanium strip are T*W1*L1, and the width of the conductive copper plate is W2≥W1+d, where d≥10 mm.

[0013] Furthermore, in step S1, the surface roughness Ra of the tooling after machining is ≤6.3μm.

[0014] Furthermore, in step S1, the thickness T of the steel plate 钢板 The thickness T of the conductive copper plate is ≥20mm. 铜板 ≥2mm, the steel plate and the conductive copper plate are detachably connected as one piece.

[0015] Furthermore, the steel plate and the conductive copper plate are detachably connected by fixing screws.

[0016] Furthermore, in step S2, the titanium mesh plate is cleaned before being placed onto the tooling.

[0017] Furthermore, in step S2, the titanium mesh plate and the titanium strip are joined together on the conductive copper plate with no gap between them, and the joint between the titanium mesh plate and the titanium strip is pressed together by a switch-type magnetic base.

[0018] Furthermore, the maximum output power of the single-motor scanning oscillating laser welding machine is 3000W. In step S3, the output power setting parameters of the single-motor scanning oscillating laser welding machine after power-on are 400-850W, scanning speed 40-80mm / s, scanning width 1.8-2.8mm, duty cycle 100%, and frequency 40-50HZ.

[0019] Furthermore, in step S3, the welding shielding gas is set to argon, with a gas-on delay of 100ms and a gas-off delay of 200ms.

[0020] Furthermore, in step S4, manual welding is performed in a segmented straight line manner. After one section of weld is completed, the position of the switch-type magnetic base is moved to continue welding until the welding is completed.

[0021] Compared with existing technologies, the welding method for ultrathin titanium mesh plates described in this invention has the following advantages:

[0022] The welding method for ultra-thin titanium mesh plates described in this invention is designed for laser welding of 1.0-2.0mm ultra-thin titanium mesh plates. Taking into account the characteristics of ultra-thin titanium mesh plates such as easy deformation, easy oxidation, and point contact, the method achieves high welding strength, small deformation, and oxidation-free welding of ultra-thin titanium mesh plates through tooling design and reasonable laser welding parameter settings. At the same time, by using a single-motor scanning oscillating laser welding machine, the equipment and process are simple, the production efficiency is high, and mass production can be realized. Attached Figure Description

[0023] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0024] Figure 1 This is a schematic diagram of the assembly of the ultra-thin titanium mesh plate described in an embodiment of the present invention with the welding fixture during welding;

[0025] Figure 2 This is a schematic diagram of the weld appearance structure of the titanium mesh plate after welding using the welding method described above in Specific Example 1 of the present invention.

[0026] Figure 3 This is a schematic diagram of the weld seam structure of the titanium mesh plate after welding using the welding method described above in Specific Example 2 of the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Steel plate, 2. Conductive copper plate, 3. Titanium mesh plate, 4. Switch-type magnetic base, 5. Titanium strip, 6. Weld seam, 7. Fixing screw. Detailed Implementation

[0029] To make the technical means and objectives and effects of the present invention easier to understand, the embodiments of the present invention will be described in detail below with reference to specific illustrations.

[0030] It should be noted that all directional and positional terms used in this invention, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "lateral," "longitudinal," and "center," are only used to explain the relative positional relationships and connections between components in a specific state (as shown in the accompanying drawings). They are merely for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0031] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] like Figure 1 As shown, the welding method for the ultrathin titanium mesh plate of the present invention includes the following steps:

[0034] S1: Tooling design. The tooling is designed according to the size of the titanium mesh plate 3. The main materials of the tooling are steel plate 1 and conductive copper plate 2. The conductive copper plate 2 is set above the steel plate 1. The conductive copper plate 2 is arranged in an enclosing shape. A recessed groove for accommodating the titanium mesh plate 3 is formed on the conductive copper plate 2.

[0035] S2: Placement of titanium mesh plate 3 and titanium strip 5; After the tooling is installed and placed, place titanium mesh plate 3 and titanium strip 5 on the tooling, wherein titanium mesh plate 3 is placed in the recessed groove on conductive copper plate 2, titanium strip 5 is placed on conductive copper plate 2, and titanium strip 5 is mated and attached to titanium mesh plate 3.

[0036] S3: Set laser welding parameters; Welding is performed using a single-motor scanning oscillating laser welder. The laser welding parameters set include output power, scanning speed, and scanning width.

[0037] S4: Welding; Welding is performed using a laser welding torch, with the torch moving at a speed matched to the welding machine scanning speed.

[0038] The present invention discloses a laser welding method for ultra-thin titanium mesh plates of 1.0-2.0 mm. Taking into account the characteristics of ultra-thin titanium mesh plates such as easy deformation, easy oxidation, and point contact, the method achieves high welding strength, small deformation, and oxidation-free welding of ultra-thin titanium mesh plates through tooling design and reasonable laser welding parameter settings. At the same time, by using a single-motor scanning oscillating laser welding machine, the equipment and process are simple, the production efficiency is high, and mass production can be realized.

[0039] As a preferred example of the present invention, in step S1, the size of the titanium mesh plate 3 is T*W*L, where T is the thickness of 1.0 to 2.0 mm, W is the width, and L is the length. The sinking depth of the upper and lower recesses of the conductive copper plate 2 is the same as the thickness T of the titanium mesh plate 3. The size of the titanium plate strip 5 is T*W1*L1, and the width W2 of the conductive copper plate 2 is ≥W1+d, where d ≥ 10 mm.

[0040] This design discloses a relative structural relationship between a titanium mesh plate 3, titanium strips 5, and a conductive copper plate 2, ensuring that the tooling design fits snugly with the titanium mesh plate 3 and titanium strips 5, reducing stress deformation during welding of the ultra-thin titanium mesh plate, and improving welding reliability.

[0041] As a preferred example of the present invention, in step S1, the surface roughness Ra of the tooling after processing is ≤6.3μm.

[0042] This design further reduces stress deformation of the ultra-thin titanium mesh during welding on the tooling.

[0043] As a preferred example of the present invention, in step S1, the thickness T of the steel plate 1 钢板 The thickness T of the conductive copper plate 2 is ≥20mm. 铜板 The thickness is ≥2mm, and the steel plate 1 and the conductive copper plate 2 are detachably connected as one unit. As an example of the present invention, the steel plate 1 and the conductive copper plate 2 are detachably connected by fixing screws 7.

[0044] This setup ensures the structural strength of the design tooling, while also allowing for rapid and adaptive adjustments to the tooling design based on different titanium mesh plate sizes, reducing material waste and improving product utilization.

[0045] As a preferred example of the present invention, in step S2, the titanium mesh plate 3 undergoes a cleaning process before being placed on the tooling. Preferably, the cleaning process of the titanium mesh plate 3 includes decontamination, acid washing, and drying.

[0046] As a preferred example of the present invention, in step S2, the titanium mesh plate 3 and the titanium strip 5 are joined together on the conductive copper plate 2 with no gap between them. The joint of the titanium mesh plate 3 and the titanium strip 5 is magnetically pressed together by a switchable magnetic base 4. This innovative design of a clamping fixture for the titanium mesh plate 3 and the titanium strip 5 ensures high strength and minimal deformation of the welded titanium mesh joint.

[0047] As a preferred example of the present invention, the maximum output power of the single-motor scanning oscillating laser welding machine is 3000W. In step S3, the output power setting parameters of the single-motor scanning oscillating laser welding machine after power-on are 400-850W, scanning speed 40-80mm / s, scanning width 1.8-2.8mm, duty cycle 100%, and frequency 40-50HZ.

[0048] As a preferred example of the present invention, in step S3, the welding shielding gas is set to argon, with a gas-on delay of 100ms and a gas-off delay of 200ms.

[0049] As a preferred example of the present invention, in step S4, manual welding is performed in a segmented straight line manner. After a section of weld 6 is completed, the position of the switch-type magnetic base 4 is moved to continue welding until the welding is completed.

[0050] By setting the above parameters and welding process, the welded joints are guaranteed to have high strength, small deformation, and no oxidation, greatly enriching the connection methods of ultra-thin titanium and titanium alloys.

[0051] The welding method for ultra-thin titanium mesh plates described in this invention discloses a laser welding method for 1.0-2.0mm ultra-thin titanium mesh plates through tooling design and reasonable laser welding parameter settings. This method achieves high strength, small deformation, and oxidation-free welding of ultra-thin titanium mesh plates. The process steps are simple, the production efficiency is high, and the connection methods for ultra-thin titanium and titanium alloys are greatly enriched. Furthermore, it enables mass production.

[0052] Specific example 1:

[0053] Step 1, Tooling Design: The pure titanium mesh plate 3 has dimensions of 1.0*1000*1000mm. The design tooling steel plate thickness is 20mm, the conductive copper plate thickness is 2mm, the titanium plate strip dimensions are 51.0*20*1000mm, the conductive copper plate has a central recessed area of ​​1020*1020mm with a recessed depth of 1.0mm, the conductive copper plate width is 30mm, and the surface roughness Ra after processing is ≤6.3μm.

[0054] Step 2: Placement of titanium mesh plate 3 and titanium strip 5; After the tooling is installed and placed, place the clean titanium mesh plate 3 and titanium strip 5 in the upper and lower recessed areas of the tooling, so that the strands of titanium mesh plate 3 and titanium strip 5 are connected and attached, using a butt joint, leaving no gap between the two, and then use a switch-type magnetic seat 5 to magnetically press them together.

[0055] Step 3: Laser welding parameter settings: The equipment used is a single-motor scanning oscillating laser welding machine. After powering on, set the output power to 400W, scanning speed to 40mm / s, scanning width to 1.8mm, duty cycle to 100%, frequency to 40HZ, welding shielding gas to argon, gas on delay to 100ms, and gas off delay to 200ms.

[0056] Step 4, Welding: Welding is performed using a laser welding gun. Manual welding is carried out in a segmented straight line. The welding gun movement speed is matched with the welding machine scanning speed. The weld seam is metallic and free of oxidation. After one section of the weld seam is completed, the switch-type magnetic base 5 is moved to continue welding until the welding is completed.

[0057] The weld seam of the welded titanium mesh plate has the following appearance: Figure 2 As shown, the flatness of the titanium mesh plate after welding is 6mm / m. At the same time, a 50mm wide sample was taken for welding strength tensile and compressive shear tests. The tensile stress limit of the weld point cracking is not less than 0.35KN, and the shear stress limit of the weld point cracking is not less than 8.4KN.

[0058] Specific example 2:

[0059] Step 1, Tooling Design: The pure titanium mesh is 2.0*800*800mm in size. The design tooling steel plate is 20mm thick, the conductive copper plate is 2mm thick, the titanium strip is 1.0*25*800mm, the conductive copper plate is designed with a recessed area of ​​825*825mm in the middle, the recessed depth is 2.0mm, the width of the conductive copper plate is 35mm, and the surface roughness Ra after processing is ≤6.3μm.

[0060] Step 2, Placement of titanium mesh plate 3 and titanium strip 5: After the tooling is installed and placed, place the clean titanium mesh plate 3 and titanium strip 5 in the recessed area above the tooling, so that the strands of titanium mesh plate 3 and titanium strip 5 are connected and attached, using a butt joint, leaving no gap between the two, and then use a switch-type magnetic seat 5 to magnetically press them together.

[0061] Step 3: Laser welding parameter settings: The equipment used is a single-motor scanning oscillating laser welding machine. After powering on, set the output power to 850W, scanning speed to 80mm / s, scanning width to 2.8mm, duty cycle to 100%, frequency to 50HZ, welding shielding gas to argon, gas on delay to 100ms, and gas off delay to 200ms.

[0062] Step 4, Welding: Welding is performed using a laser welding gun. Manual welding is carried out in a segmented straight line. The welding gun movement speed is matched with the welding machine scanning speed. The weld seam is metallic and free of oxidation. After one section of the weld seam is completed, the switch-type magnetic base 5 is moved to continue welding until the welding is completed.

[0063] The weld seam of the welded titanium mesh plate has the following appearance: Figure 3 As shown, the flatness of the titanium mesh plate after welding is 8mm / m. At the same time, a 50mm wide sample was taken for welding strength tensile and compressive shear tests. The tensile stress limit of the weld point cracking is not less than 0.40KN, and the shear stress limit of the weld point cracking is not less than 8.6KN.

[0064] The welding method for ultrathin titanium mesh plates described in this invention has the following innovations and advantages:

[0065] ① Taking into account the characteristics of ultra-thin titanium mesh such as easy deformation, easy oxidation, and point contact, an innovative clamping fixture for titanium mesh and titanium plate was designed. The welded titanium plate mesh joint has high strength, small deformation, and no oxidation, which is an excellent welding method for ultra-thin titanium plate mesh.

[0066] ② Laser pulse welding is used, which involves simple equipment and processes, high production efficiency, and enables mass production.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A welding method for ultrathin titanium mesh plates, characterized in that, The operation steps include the following: S1: Tooling design, tooling is designed according to the size of titanium mesh plate (3). The main materials of the tooling are steel plate (1) and conductive copper plate (2). The conductive copper plate (2) is set above the steel plate (1). The conductive copper plate (2) is set in an enclosing shape. A recessed groove for accommodating titanium mesh plate (3) is formed on the conductive copper plate (2). S2: Placement of titanium mesh plate (3) and titanium strip (5); After the tooling is installed and placed, place titanium mesh plate (3) and titanium strip (5) on the tooling, wherein titanium mesh plate (3) is placed in the recessed groove on conductive copper plate (2), titanium strip (5) is placed on conductive copper plate (2), and the titanium strip (5) is mated and attached to the titanium mesh plate (3); S3: Set laser welding parameters; Welding is performed using a single-motor scanning oscillating laser welder. The laser welding parameters set include output power, scanning speed, and scanning width. S4: Welding; Welding is performed using a laser welding torch, with the torch movement speed matched to the welding machine scanning speed; In step S1, the size of the titanium mesh plate (3) is T*W*L, where T is the thickness of 1.0~2.0mm, W is the width, and L is the length. The sinking depth of the upper and lower recesses of the conductive copper plate (2) is the same as the thickness T of the titanium mesh plate (3). The size of the titanium plate strip (5) is T*W1*L1. The width W2 of the conductive copper plate (2) is ≥W1+d, and d≥10mm.

2. The welding method for the ultrathin titanium mesh plate according to claim 1, characterized in that, In step S1, the surface roughness Ra of the tooling after machining is ≤6.3μm.

3. The welding method for the ultrathin titanium mesh plate according to claim 1, characterized in that, In step S1, the thickness T of the steel plate (1) 钢板 The thickness T of the conductive copper plate (2) is ≥20mm. 铜板 ≥2mm, the steel plate (1) and the conductive copper plate (2) are detachably connected as one unit.

4. The welding method for the ultrathin titanium mesh plate according to claim 1, characterized in that, The steel plate (1) and the conductive copper plate (2) are detachably connected by fixing screws (7).

5. The welding method for the ultrathin titanium mesh plate according to claim 1, characterized in that, In step S2, the titanium mesh plate (3) is cleaned before being placed on the tooling.

6. The welding method for the ultrathin titanium mesh plate according to claim 1, characterized in that, In step S2, the titanium mesh plate (3) and the titanium strip (5) are joined together on the conductive copper plate (2) with no gap between them. The joint between the titanium mesh plate (3) and the titanium strip (5) is pressed together by a switch-type magnetic seat (4).

7. The welding method for the ultrathin titanium mesh plate according to claim 1, characterized in that, The maximum output power of the single-motor scanning oscillating laser welding machine is 3000W. In step S3, the output power setting parameters of the single-motor scanning oscillating laser welding machine after power-on are 400-850W, scanning speed 40-80mm / s, scanning width 1.8-2.8mm, duty cycle 100%, and frequency 40-50HZ.

8. The welding method for the ultrathin titanium mesh plate according to claim 1, characterized in that, In step S3, the welding shielding gas is set to argon, with a gas-on delay of 100ms and a gas-off delay of 200ms.

9. The welding method for the ultrathin titanium mesh plate according to claim 1, characterized in that, In step S4, manual welding is performed by moving in a straight line in segments. After one section of the weld is completed, the position of the switch-type magnetic base (4) is moved and welding continues until the welding is completed.

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