阅读说明：本技术 一种粉末多孔金属薄膜滤管的制作方法 (Method for manufacturing powder porous metal film filter tube ) 是由 李永利 吴引江 李彩霞 王耀辉 成凯 曹卜元 唐芳丽 于 2020-11-20 设计创作，主要内容包括：本发明公开了一种粉末多孔金属薄膜滤管的制作方法,将粉末多孔金属薄膜按照规格要求剪裁,采用卷制设备对原料进行管体卷制,采用纵缝焊接设备对管体进行搭接焊,再采用圆周焊接设备对管体两端与不锈钢环进行圆周焊,将焊后的管体穿入端部密封端,内部设置支撑管,对粉末多孔金属薄膜虑管进行支撑,对两端不锈钢环与密封部位及底部进行焊接。该制作工艺的管体一体成型或分段拼接,规格及长度均能满足。(The invention discloses a manufacturing method of a powder porous metal film filter tube, which cuts a powder porous metal film according to specification requirements, rolls a tube body of a raw material by using rolling equipment, performs lap welding on the tube body by using longitudinal seam welding equipment, performs circumferential welding on two ends of the tube body and stainless steel rings by using circumferential welding equipment, penetrates the welded tube body into an end part sealing end, is internally provided with a support tube, supports the powder porous metal film filter tube, and welds the stainless steel rings at two ends with a sealing part and the bottom. The pipe body of the manufacturing process is integrally formed or spliced in sections, and the specification and the length can meet the requirements.)

1. The manufacturing method of the powder porous metal film filter tube is characterized by comprising the following steps:

step 1, vertically assembling a mandril (4) at the central position of one side of a bottom plate (3), and then welding by adopting argon arc welding; wherein the welding current is 40A-100A, and the welding voltage is: 10V-18V;

step 2, welding a supporting pipe (2) on the other side of the bottom plate (3), wherein the central shaft of the supporting pipe (2) is coaxial with the ejector rod (4), and the other end of the supporting pipe (2) is provided with a sealing flange;

step 3, cutting and blanking the powder porous metal film as required, and coiling the powder porous metal film by adopting coiling equipment to form a prefabricated powder porous metal film filter tube (6) wrapping the support tube (2); after rolling, welding by adopting a longitudinal seam welding mechanism of a resistance energy storage welding machine, wherein the welding adopts a lap joint structure, and the lap joint width is 8-20 mm; welding parameters are as follows: capacitance: 280 mu F-340 mu F; charging voltage: 6-11V; frequency: 12pulse/sec-25 pulse/sec; welding speed: 30mm/min-50 mm/min;

and 4, rolling a plate to form the connecting ring (5), wherein the thickness of the plate is as follows: 0.5mm-1.2mm, blanking width: 12-25 mm; roll up system go-between (5) internal diameter and prefabricated powder porous metal film chimney filter (6) external diameter and equal, the welding adopts argon arc to weld, and wherein welding current: 30A-60A, welding voltage: 8V-13V;

step 5, assembling the connecting ring (5) at the end part of the prefabricated powder porous metal film filter tube (6), wherein the lap joint width is 8-15 mm; then, a resistance energy storage welding machine circumferential welding mechanism is adopted for welding, and the welding parameters are as follows: capacitance: 70 muF-130 muF; charging voltage: 4-9V; frequency: 12pulse/sec-25 pulse/sec; welding speed: 30mm/min-50mm/min, transformation ratio grade: grade 3-5;

step 6, nesting the prefabricated powder porous metal film filter pipe assembly assembled in the step 5 outside the support pipe assembly assembled in the step 2, welding the connecting ring (5) and the sealing flange by adopting argon arc welding, and finally assembling and welding a ring (7) at one end of the prefabricated powder porous metal film filter pipe (6) far away from the sealing flange, wherein the welding current is as follows: 60A-120A, welding voltage: 10V-18V; and finally, welding the blocking ring (7) with the bottom plate (3) to obtain the powder porous metal film filter tube.

2. The method for manufacturing a powder porous metal membrane filter tube according to claim 1, wherein the welding in step 2 is argon arc welding, wherein the welding current is as follows: 60A-120A, welding voltage: 10V-18V.

3. The method for manufacturing a powder porous metal membrane filter tube according to claim 1, wherein the welding structure of the bottom plate (3) and the top bar (4) in step 1 is as follows: the ejector rod (4) is exposed to be 3-6mm higher than the bottom plate after being assembled, a fillet weld is adopted inside the ejector rod (4), and a fixing hole or a screw thread is arranged at the position of the ejector rod (4) and is used for being fixed with the bottom plate (3).

4. The method for manufacturing the powder porous metal membrane filter tube as claimed in claim 1, wherein the sealing flange (1), the bottom plate (3) and the support tube (2) are assembled and welded in the step 2: and (3) adopting lock bottom welding, wherein the insertion depth of the lock bottom is more than or equal to 3 mm.

5. The method of claim 1, wherein the porous metal powder film is cut by a shearing machine in step 3.

6. The method as claimed in claim 1, wherein the diameter of the lower roller of the porous metal powder film tube coiling device in step 3 is 1.3-1.8 times of the diameter of the coiled tube, and the diameter of the upper roller is 0.5-0.8 times of the diameter of the coiled tube; the distance between the lower rollers is matched with the diameter of the lower rollers and the diameter of the upper rollers and is 1.8-2 times of the diameter of the rolled pipe.

7. The method of claim 6, wherein the step 3 of welding the longitudinal seams of the porous metal powder membrane is performed by overlap capacitor energy storage welding.

8. The method of claim 6, wherein the step 5 of pre-fabricating the powder porous metal membrane filter tube (6) and the connection ring (5) is performed by overlap capacitor energy storage welding.

9. The method as claimed in claim 6, wherein the assembly structure of the filter tube assembly and the support tube assembly of the powder porous metal film in step 6 is a bottom-locking structure.

Technical Field

The invention belongs to the technical field of separation and filtration devices, and particularly relates to a manufacturing method of a powder porous metal film filter tube.

Background

During the manufacturing process of the prefabricated powder porous metal film filter tube, the problems of workpiece blanking, rolling, welding and the like are limited. The small long pipe is difficult to be rolled up, and a sectional splicing method is generally adopted. Tubular workpieces of various specifications and lengths cannot be integrally welded; the number of welding seams is increased in a sectional mode in the manufacturing process, the workload is increased, the welding seams are easy to have defects, and how to improve the prefabricated powder porous metal film filter tube is made according to the required materials, so that the problem to be solved in the field is solved urgently.

Disclosure of Invention

The invention aims to provide a method for manufacturing a powder porous metal film filter tube, which solves the problems that a prefabricated powder porous metal film filter tube adopts multi-section splicing welding, the workload is high, and the porous metal film filter tube cannot be integrally manufactured according to actual requirements.

The technical scheme adopted by the invention is as follows: a manufacturing method of a powder porous metal film filter tube specifically comprises the following steps:

step 1, vertically assembling a mandril at the central position of one side of a bottom plate, and then welding by adopting argon arc welding; wherein the welding current is 40A-100A, and the welding voltage is: 10V-18V;

step 2, welding a supporting pipe on the other side of the bottom plate, wherein the central shaft of the supporting pipe is coaxial with the ejector rod, and the other end of the supporting pipe is provided with a sealing flange;

step 3, cutting and blanking the powder porous metal film as required, and coiling the powder porous metal film by adopting coiling equipment to form a prefabricated powder porous metal film filter tube wrapping the support tube; after rolling, welding by adopting a longitudinal seam welding mechanism of a resistance energy storage welding machine, wherein the welding adopts a lap joint structure, and the lap joint width is 8-20 mm; welding parameters are as follows: capacitance: 280 mu F-340 mu F; charging voltage: 6-11V; frequency: 12pulse/sec-25 pulse/sec; welding speed: 30mm/min-50mm/min.

And 4, rolling a plate to form the connecting ring, wherein the thickness of the plate is as follows: 0.5mm-1.2mm, blanking width: 12-25 mm; roll up system go-between internal diameter and prefabricated powder porous metal film filter tube external diameter and equal, the welding adopts argon arc to weld, and wherein welding current: 30A-60A, welding voltage: 8V-13V;

step 5, assembling the connecting ring at the end part of the prefabricated powder porous metal film filter tube, wherein the lap joint width is 8-15 mm; then, a resistance energy storage welding machine circumferential welding mechanism is adopted for welding, and the welding parameters are as follows: capacitance: 70 muF-130 muF; charging voltage: 4-9V; frequency: 12pulse/sec-25 pulse/sec; welding speed: 30mm/min-50mm/min, transformation ratio grade: grade 3-5;

step 6, nesting the prefabricated powder porous metal film filter pipe assembly assembled in the step 5 outside the support pipe assembly assembled in the step 2, welding the connecting ring and the sealing flange by adopting argon arc welding, and finally assembling and welding a plugging ring at one end of the prefabricated powder porous metal film filter pipe, which is far away from the sealing flange, wherein the welding current is as follows: 60A-120A, welding voltage: 10V-18V; and finally, welding the blocking ring with the bottom plate.

The present invention is also characterized in that,

step 2, argon arc welding is adopted for welding, wherein the welding current is as follows: 60A-120A, welding voltage: 10V-18V;

in step 1, the welding structure of the bottom plate and the ejector rod is as follows: the ejector rod is exposed 3-6mm higher than the bottom plate after being assembled, fillet welds are adopted inside the ejector rod, and a fixing hole or a screw thread is arranged at the ejector rod part and used for being fixed with the bottom plate.

Assembling and welding the sealing flange, the bottom plate and the supporting pipe in the step 2: and (3) adopting lock bottom welding, wherein the insertion depth of the lock bottom is more than or equal to 3 mm.

And 3, cutting the powder porous metal film by using a shearing machine.

In the step 3, the diameter of a lower roller of the powder porous metal film pipe coiling equipment is 1.3-1.8 times of the coiled pipe diameter, and the diameter of an upper roller of the powder porous metal film pipe coiling equipment is 0.5-0.8 times of the coiled pipe diameter; the distance between the lower rollers is matched with the diameter of the lower rollers and the diameter of the upper rollers and is 1.8-2 times of the diameter of the rolled pipe.

And 3, welding longitudinal seams of the powder porous metal film by adopting a lap capacitor energy storage welding method.

And 5, prefabricating the powder porous metal film filter tube and the connecting ring by adopting a lap capacitor energy storage welding method.

In step 6, the assembly structure of the powder porous metal film filter pipe assembly and the support pipe assembly adopts a bottom locking structure.

The invention has the beneficial effects that: the invention relates to a manufacturing method of a powder porous metal film filter tube, which is characterized in that a rolling device is adopted to roll a tube body of a raw material, a longitudinal seam welding device is adopted to weld the tube body in an overlapping manner, a circumference welding device is adopted to perform circumference welding on two ends of the tube body and a stainless steel ring, the welded tube body penetrates through the end part to be sealed, a supporting tube is arranged inside the tube body to support the prefabricated powder porous metal film filter tube, and connecting rings at two ends are welded with the sealed part and the bottom. The manufacturing method can meet the design requirements of filter tubes with different specifications, and multi-section splicing is not required.

Drawings

FIG. 1 is a schematic diagram of a prefabricated powder porous metal membrane filter tube according to the present invention.

In the figure, 1 is a sealing flange, 2 is a supporting pipe, 3 is a bottom plate, 4 is an ejector rod, 5 is a connecting ring, 6 is a porous metal film filtering pipe, and 7 is a blocking ring.

Detailed Description

The present invention will be described in detail with reference to the following embodiments.

The manufacturing method of the powder porous metal film filter tube comprises the following steps: firstly welding a bottom plate 3 and an ejector rod 4, then welding a sealing flange 1, the bottom plate 3 and a support tube 2, welding longitudinal seams of a prefabricated powder porous metal film filter tube 6, welding connecting rings 5 at two ends of the powder porous metal film filter tube 6 to form a filter tube assembly, penetrating the filter tube assembly on the support tube, welding the connecting rings 5 with the sealing flange 1 and a blocking ring 7, and then welding the blocking ring 7 with the bottom plate 3. The method is implemented according to the following steps:

step 1, vertically assembling a mandril 4 at the central position of one side of a bottom plate 3, and then welding by adopting argon arc welding; wherein the welding current is 40A-100A, and the welding voltage is: 10V-18V;

step 2, welding a supporting tube 2 on the other side of the bottom plate 3, wherein the central shaft of the supporting tube 2 is coaxial with the ejector rod 4, and the other end of the supporting tube 2 is provided with a sealing flange 1;

step 3, cutting and blanking the powder porous metal film as required, and coiling the powder porous metal film by adopting coiling equipment to form a prefabricated powder porous metal film filter tube 6 wrapping the support tube 2; after rolling, welding by adopting a longitudinal seam welding mechanism of a resistance energy storage welding machine, wherein the welding adopts a lap joint structure, and the lap joint width is 8-20 mm; welding parameters are as follows: capacitance: 280 mu F-340 mu F; charging voltage: 6-11V; frequency: 12pulse/sec-25 pulse/sec; welding speed: 30mm/min-50mm/min.

And 4, rolling a plate to form the connecting ring 5, wherein the thickness of the plate is as follows: 0.5mm-1.2mm, blanking width: 12-25 mm; roll up system go-between 5 internal diameters and prefabricated powder porous metal film filter tube 6 external diameters and equal, the welding adopts argon arc to weld, and wherein welding current: 30A-60A, welding voltage: 8V-13V;

step 5, assembling the connecting ring 5 at the end part of the prefabricated powder porous metal film filter tube 6, wherein the lap joint width is 8-15 mm; then, a resistance energy storage welding machine circumferential welding mechanism is adopted for welding, and the welding parameters are as follows: capacitance: 70 muF-130 muF; charging voltage: 4-9V; frequency: 12pulse/sec-25 pulse/sec; welding speed: 30mm/min-50mm/min, transformation ratio grade: grade 3-5;

step 6, nesting the prefabricated powder porous metal film filter pipe assembly assembled in the step 5 outside the support pipe assembly assembled in the step 2, welding the connecting ring 5 and the sealing flange 1 by adopting argon arc welding, and finally assembling and welding a ring 7 at one end of the prefabricated powder porous metal film filter pipe 6 far away from the sealing flange 1, wherein the welding current is as follows: 60A-120A, welding voltage: 10V-18V; and finally, welding the blocking ring 7 with the bottom plate 3 to obtain the powder porous metal film filter tube shown in the figure 1.

Step 2, adopting argon arc welding for welding, wherein the welding current is as follows: 60A-120A, welding voltage: 10V-18V;

in the step 1, the welding structure of the bottom plate 3 and the mandril 4 is as follows: the ejector rod 4 is exposed 3-6mm higher than the bottom plate after being assembled, fillet weld is adopted inside the ejector rod 4, and a fixing hole or a screw thread is arranged at the position of the ejector rod 4 and is used for being fixed with the bottom plate 3.

In the step 2, the sealing flange 1, the bottom plate 3 and the supporting tube 2 are assembled and welded: and (3) adopting lock bottom welding, wherein the insertion depth of the lock bottom is more than or equal to 3 mm.

And 3, cutting the powder porous metal film by using a shearing machine.

In the step 3, the diameter of a lower roller of the powder porous metal film pipe coiling equipment is 1.3-1.8 times of the coiled pipe diameter, and the diameter of an upper roller of the powder porous metal film pipe coiling equipment is 0.5-0.8 times of the coiled pipe diameter; the distance between the lower rollers is matched with the diameter of the lower rollers and the diameter of the upper rollers and is 1.8-2 times of the diameter of the rolled pipe.

And 3, welding longitudinal seams of the powder porous metal film by adopting a lap capacitor energy storage welding method.

And 4, arranging a connecting ring structure at the end part of the prefabricated powder porous metal film filter tube in the step 4, solving the problem of welding with a sealing element and being also used for segmented splicing connection.

And 5, performing the pre-manufacturing of the powder porous metal film filter tube 6 and the connecting ring 5 by adopting a lap capacitor energy storage welding method.

And 6, the assembly structure of the powder porous metal film filter pipe assembly and the support pipe assembly adopts a lock bottom structure, so that the problem of oxidation during welding of the connecting ring is reduced, and the difficulty of welding a thin plate in the welding process is reduced.

The invention is further illustrated by the following specific examples:

example 1

Step 1, vertically assembling a mandril 4 at the central position of one side of a bottom plate 3, and then welding by adopting argon arc welding; wherein the welding current is 40A, the welding voltage is: 10V;

step 2, welding a supporting tube 2 on the other side of the bottom plate 3, wherein the central shaft of the supporting tube 2 is coaxial with the ejector rod 4, and the other end of the supporting tube 2 is provided with a sealing flange 1;

step 3, cutting and blanking the powder porous metal film as required, and coiling the powder porous metal film by adopting coiling equipment to form a prefabricated powder porous metal film filter tube 6 wrapping the support tube 2; after rolling, welding by adopting a longitudinal seam welding mechanism of a resistance energy storage welding machine, wherein the welding adopts a lap joint structure, and the lap joint width is 8; welding parameters are as follows: capacitance: 280 mu F; charging voltage: 6V; frequency: 12 pulse/sec; welding speed: 30mm/min.

And 4, rolling a plate to form the connecting ring 5, wherein the thickness of the plate is as follows: 0.5mm, blanking width: 12 mm; roll up system go-between 5 internal diameters and prefabricated powder porous metal film filter tube 6 external diameters and equal, the welding adopts argon arc to weld, and wherein welding current: 30A, welding voltage: 8V, and (2);

step 5, assembling the connecting ring 5 at the end part of the prefabricated powder porous metal film filter tube 6, wherein the lap joint width is 8; then, a resistance energy storage welding machine circumferential welding mechanism is adopted for welding, and the welding parameters are as follows: capacitance: 70 muF; charging voltage: 4V; frequency: 12 pulse/sec; welding speed: 30mm/min. transformation ratio order: 3, grade;

step 6, nesting the prefabricated powder porous metal film filter pipe assembly assembled in the step 5 outside the support pipe assembly assembled in the step 2, welding the connecting ring 5 and the sealing flange 1 by adopting argon arc welding, and finally assembling and welding a ring 7 at one end of the prefabricated powder porous metal film filter pipe 6 far away from the sealing flange 1, wherein the welding current is as follows: 60A, welding voltage: 10V; and finally, welding the blocking ring 7 with the bottom plate 3.

Step 2, adopting argon arc welding for welding, wherein the welding current is as follows: 60A, welding voltage: 10V;

in the step 1, the welding structure of the bottom plate 3 and the mandril 4 is as follows: the ejector rod 4 is exposed to be 3mm higher than the bottom plate after being assembled, fillet welds are adopted inside the ejector rod 4, and fixing holes or screw threads are formed in the ejector rod 4 and used for being fixed with the bottom plate 3.

In the step 2, the sealing flange 1, the bottom plate 3 and the supporting tube 2 are assembled and welded: and (4) adopting lock bottom welding, wherein the insertion depth of the lock bottom is 3 mm.

And 3, cutting the powder porous metal film by using a shearing machine.

In the step 3, the diameter of a lower roller of the powder porous metal film pipe coiling equipment is 1.3 times of the coiling pipe diameter, and the diameter of an upper roller of the powder porous metal film pipe coiling equipment is 0.8 times of the coiling pipe diameter; the distance between the lower rollers is matched with the diameter of the lower rollers and the diameter of the upper rollers and is 1.8 times of the diameter of the rolled pipe.

And 3, welding longitudinal seams of the powder porous metal film by adopting a lap capacitor energy storage welding method.

And 4, arranging a connecting ring structure at the end part of the prefabricated powder porous metal film filter tube in the step 4, solving the problem of welding with a sealing element and being also used for segmented splicing connection.

And 5, performing the pre-manufacturing of the powder porous metal film filter tube 6 and the connecting ring 5 by adopting a lap capacitor energy storage welding method.

And 6, the assembly structure of the powder porous metal film filter pipe assembly and the support pipe assembly adopts a lock bottom structure, so that the problem of oxidation during welding of the connecting ring is reduced, and the difficulty of welding a thin plate in the welding process is reduced.

Example 2

Step 1, vertically assembling a mandril 4 at the central position of one side of a bottom plate 3, and then welding by adopting argon arc welding; wherein the welding current is 100A, the welding voltage is: 18V;

step 2, welding a supporting tube 2 on the other side of the bottom plate 3, wherein the central shaft of the supporting tube 2 is coaxial with the ejector rod 4, and the other end of the supporting tube 2 is provided with a sealing flange 1;

step 3, cutting and blanking the powder porous metal film as required, and coiling the powder porous metal film by adopting coiling equipment to form a prefabricated powder porous metal film filter tube 6 wrapping the support tube 2; after rolling, welding by adopting a longitudinal seam welding mechanism of a resistance energy storage welding machine, wherein the welding adopts a lap joint structure, and the lap joint width is 20 mm; welding parameters are as follows: capacitance: 340 muF; charging voltage: 11V, and (3); frequency: 25 pulse/sec; welding speed: 50mm/min.

And 4, rolling a plate to form the connecting ring 5, wherein the thickness of the plate is as follows: 1.2mm, blanking width: 25 mm; roll up system go-between 5 internal diameters and prefabricated powder porous metal film filter tube 6 external diameters and equal, the welding adopts argon arc to weld, and wherein welding current: 60A, welding voltage: 13V;

step 5, assembling the connecting ring 5 at the end part of the prefabricated powder porous metal film filter tube 6, wherein the lap joint width is 15 mm; then, a resistance energy storage welding machine circumferential welding mechanism is adopted for welding, and the welding parameters are as follows: capacitance: 130 muF; charging voltage: 9V; frequency: 25 pulse/sec; welding speed: 50mm/min. transformation ratio order: grade 5;

step 6, nesting the prefabricated powder porous metal film filter pipe assembly assembled in the step 5 outside the support pipe assembly assembled in the step 2, welding the connecting ring 5 and the sealing flange 1 by adopting argon arc welding, and finally assembling and welding a ring 7 at one end of the prefabricated powder porous metal film filter pipe 6 far away from the sealing flange 1, wherein the welding current is as follows: 120A, welding voltage: 18V; and finally, welding the blocking ring 7 with the bottom plate 3.

Step 2, adopting argon arc welding for welding, wherein the welding current is as follows: 120A, welding voltage: 18V;

in the step 1, the welding structure of the bottom plate 3 and the mandril 4 is as follows: the ejector rod 4 is exposed 6mm higher than the bottom plate after being assembled, fillet weld is adopted inside the ejector rod 4, and a fixing hole or a screw thread is arranged at the position of the ejector rod 4 and used for being fixed with the bottom plate 3.

In the step 2, the sealing flange 1, the bottom plate 3 and the supporting tube 2 are assembled and welded: and (5) adopting lock bottom welding, wherein the insertion depth of the lock bottom is 5 mm.

And 3, cutting the powder porous metal film by using a shearing machine.

In the step 3, the diameter of a lower roller of the powder porous metal film pipe coiling equipment is 1.8 times of the coiling pipe diameter, and the diameter of an upper roller of the powder porous metal film pipe coiling equipment is 0.5 times of the coiling pipe diameter; the distance between the lower rollers is matched with the diameter of the lower rollers and the diameter of the upper rollers and is 2 times of the rolling pipe diameter.

And 3, welding longitudinal seams of the powder porous metal film by adopting a lap capacitor energy storage welding method.

And 4, arranging a connecting ring structure at the end part of the prefabricated powder porous metal film filter tube in the step 4, solving the problem of welding with a sealing element and being also used for segmented splicing connection.

And 5, performing the pre-manufacturing of the powder porous metal film filter tube 6 and the connecting ring 5 by adopting a lap capacitor energy storage welding method.

And 6, the assembly structure of the powder porous metal film filter pipe assembly and the support pipe assembly adopts a lock bottom structure, so that the problem of oxidation during welding of the connecting ring is reduced, and the difficulty of welding a thin plate in the welding process is reduced.

Example 3

Step 1, vertically assembling a mandril 4 at the central position of one side of a bottom plate 3, and then welding by adopting argon arc welding; wherein the welding current is 70A, the welding voltage is: 15V;

step 2, welding a supporting tube 2 on the other side of the bottom plate 3, wherein the central shaft of the supporting tube 2 is coaxial with the ejector rod 4, and the other end of the supporting tube 2 is provided with a sealing flange 1;

step 3, cutting and blanking the powder porous metal film as required, and coiling the powder porous metal film by adopting coiling equipment to form a prefabricated powder porous metal film filter tube 6 wrapping the support tube 2; after rolling, welding by adopting a longitudinal seam welding mechanism of a resistance energy storage welding machine, wherein the welding adopts a lap joint structure, and the lap joint width is 15 mm; welding parameters are as follows: capacitance: 300 muF; the charging voltage is 8V; frequency: 20 pulse/sec; welding speed: 40mm/min.

And 4, rolling a plate to form the connecting ring 5, wherein the thickness of the plate is as follows: 1mm, blanking width: 20 mm; roll up system go-between 5 internal diameters and prefabricated powder porous metal film filter tube 6 external diameters and equal, the welding adopts argon arc to weld, and wherein welding current: 40A, welding voltage: 10V;

step 5, assembling the connecting ring 5 at the end part of the prefabricated powder porous metal film filter tube 6, wherein the lap joint width is 10 mm; then, a resistance energy storage welding machine circumferential welding mechanism is adopted for welding, and the welding parameters are as follows: capacitance: 100 muF; charging voltage: 7V, and (3) adding water; frequency: 20 pulse/sec; welding speed: 40mm/min. transformation ratio order: 4, level;

step 6, nesting the prefabricated powder porous metal film filter pipe assembly assembled in the step 5 outside the support pipe assembly assembled in the step 2, welding the connecting ring 5 and the sealing flange 1 by adopting argon arc welding, and finally assembling and welding a ring 7 at one end of the prefabricated powder porous metal film filter pipe 6 far away from the sealing flange 1, wherein the welding current is as follows: 90A, welding voltage: 14V; and finally, welding the blocking ring 7 with the bottom plate 3.

Step 2, adopting argon arc welding for welding, wherein the welding current is as follows: 80A, welding voltage: 13V;

in the step 1, the welding structure of the bottom plate 3 and the mandril 4 is as follows: the ejector rod 4 is exposed by 5mm higher than the bottom plate after being assembled, a fillet weld is adopted inside the ejector rod 4, and a fixing hole or a screw thread is arranged at the position of the ejector rod 4 and used for being fixed with the bottom plate 3.

In the step 2, the sealing flange 1, the bottom plate 3 and the supporting tube 2 are assembled and welded: and (4) adopting lock bottom welding, wherein the insertion depth of the lock bottom is 4 mm.

And 3, cutting the powder porous metal film by using a shearing machine.

In the step 3, the diameter of a lower roller of the powder porous metal film pipe coiling equipment is 1 time of the coiling pipe diameter, and the diameter of an upper roller of the powder porous metal film pipe coiling equipment is 0.6 time of the coiling pipe diameter; the distance between the lower rollers is matched with the diameter of the lower rollers and the diameter of the upper rollers and is 1.9 times of the diameter of the rolled pipe.

And 3, welding longitudinal seams of the powder porous metal film by adopting a lap capacitor energy storage welding method.

And 4, arranging a connecting ring structure at the end part of the prefabricated powder porous metal film filter tube in the step 4, solving the problem of welding with a sealing element and being also used for segmented splicing connection.

And 5, performing the pre-manufacturing of the powder porous metal film filter tube 6 and the connecting ring 5 by adopting a lap capacitor energy storage welding method.

And 6, the assembly structure of the powder porous metal film filter pipe assembly and the support pipe assembly adopts a lock bottom structure, so that the problem of oxidation during welding of the connecting ring is reduced, and the difficulty of welding a thin plate in the welding process is reduced.