A device and method for electromagnetic precision forming of a local microstructure of a difficult-to-deform metal pipe based on laser heating

Abstract

A kind of metal pipe fitting electromagnetic forming device and method based on laser heating, with positioning system including positioner, first guide rail, first numerical control moving platform, for accurately positioning metal pipe fitting and mold coordinates;Conveying system includes second guide rail, numerical control moving platform, motor, for realizing the rotation and movement of metal pipe fitting;Heating system includes laser heating device, temperature detector;Electromagnetic forming system includes spiral tube coil, mold, capacitor, DC power supply and control switch;Its characterized in that, motor, fixture, metal pipe fitting, mold, spiral tube coil are horizontally distributed on the same axis, metal pipe fitting can be rotated with the help of motor, and can be moved in the gap between spiral tube coil and mold with the aid of conveying system.The present application can realize uniform heating when metal pipe fitting electromagnetic warm forming, greatly improve heating efficiency, reduce heat affected zone, and improve the position accuracy of metal pipe fitting local microstructure electromagnetic forming.

Description

Technical Field

[0001] This invention relates to the field of metal plastic processing technology, and in particular to a thermo-electromagnetic forming device and method for metal tubes. Background Technology

[0002] The forming of local microstructures in difficult-to-deform metal tubes is widely used in the production of components in nuclear energy, aerospace, and automotive industries. Currently, common methods for forming local microstructures in metal tubes include internal high-pressure forming and electro-hydraulic forming; however, both methods have extremely stringent sealing requirements and low production efficiency. Electromagnetic forming (EMF) is a high-strain-rate forming technology that utilizes the strong Lorentz force exerted on metal in a transient high-intensity pulsed electromagnetic field to cause high-speed movement and forming. It is particularly suitable for the plastic deformation of metal tubes, efficiently forming local microstructures on the surface of metal tubes and effectively improving the uniformity of tube deformation, reducing wrinkling and springback. However, at room temperature forming, the forming performance of some difficult-to-deform materials is poor, leading to easy workpiece cracking during EMF forming. Furthermore, some workpieces have high strength, requiring large forming electromagnetic forces, often exceeding the forming capacity of the EMF forming equipment. Heating the workpiece before EMF forming can effectively improve the material's forming performance and reduce workpiece strength, thereby enhancing the EMF forming capability.

[0003] Patent publication number CN108856442B discloses a thermo-electromagnetic forming device and method for skin parts. This method heats the skin part using electrode heating and other methods before electromagnetic forming, effectively reducing the energy required for electromagnetic forming and thus lowering the requirements for forming equipment and coil strength. Additionally, patent publication number CN107138587B discloses an electromagnetically heated thermo-electromagnetic forming device and method for sheet metal parts, which uses electromagnetic heating to heat the sheet metal before electromagnetic forming. While both methods have high heating efficiency, they suffer from a large heat-affected zone, which can easily lead to a decrease in the mechanical properties of the pipe material and is not suitable for electromagnetic forming of local microstructures on the surface of pipe parts.

[0004] Furthermore, electromagnetic forming technology has not yet achieved full mechanization and automation, and many processes still require manual operation. Therefore, low positioning accuracy is a common problem in electromagnetic forming. For example, it is difficult to eliminate clamping and installation errors when manually clamping workpieces and installing molds, which leads to inaccurate forming positions of microstructures on the pipe surface. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides an electromagnetic precision forming device and method for local microstructures of difficult-to-deform metal tubes based on laser heating, aiming to improve heating efficiency, reduce the heat-affected zone, and enhance the positional accuracy during electromagnetic forming of local microstructures of metal tubes.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an electromagnetic forming device for local microstructures of difficult-to-deform metal tubular components based on laser heating, comprising a control system, a positioning system, a conveying system, a heating system, and an electromagnetic forming system. The positioning system includes a positioning device, a first guide rail, and a first CNC moving stage; the conveying system includes a second guide rail, a second CNC moving stage, and a motor; the heating system includes a laser heating device and a temperature measuring instrument; the electromagnetic forming system includes a spiral coil, a mold, a DC power supply, a capacitor, and a control switch. The first CNC moving stage is arranged on the first guide rail, and a positioning device is fixed on the first CNC moving stage; the second CNC moving stage is arranged on the second guide rail, and a motor is fixed on the second CNC moving stage; a clamp is provided on the side of the motor, which can clamp and fix one end of the metal tubular component; a matching mold is arranged on the inner or outer surface of the spiral coil; the motor, clamp, metal tubular component, mold, and spiral coil are horizontally distributed on the same axis; and the metal tubular component can move within the gap between the spiral coil and the mold with the assistance of the conveying system.

[0007] Further improvement: The controller is connected to the motor and the second CNC moving table via cables to control the motor speed and the speed and displacement of the second CNC moving table.

[0008] Further improvements: The control system is connected to the positioning instrument and the first CNC moving table via cables to accurately position each component.

[0009] Further improvement: The positioning device is a laser positioning device or an ultrasonic positioning device.

[0010] Further improvements: The control system is connected to the laser heating device and the temperature measuring device via cables, and is used to control the spot size, laser energy, and the opening and closing of the laser heating device.

[0011] Further improvement: The spiral coil is equipped with reinforcing components on its exterior or interior to improve the strength of the spiral coil.

[0012] Further improvement: The control switch includes a first switch and a second switch. The second switch, capacitor, and solenoid coil are connected in series to form a discharge circuit. The first switch and DC power supply are connected in series and then in parallel across the capacitor to form a charging circuit.

[0013] Further improvements: The mold is designed in a segmented manner to facilitate demolding after the microstructure on the surface of the metal pipe is formed, and each segment is connected to a segment fixing device.

[0014] Finally: The diameter of the spiral coil is matched with the diameter of the metal pipe. When the diameter of the metal pipe is reduced, the inner diameter of the spiral coil is 0.1-10mm larger than the outer diameter of the metal pipe. When the diameter of the metal pipe is increased, the outer diameter of the spiral coil is 0.1-10mm smaller than the inner diameter of the metal pipe.

[0015] The solution adopted by the present invention to solve the above-mentioned other technical problem is: a method of using an electromagnetic forming device for local microstructure of difficult-to-deform metal tubes based on laser heating, characterized in that the forming is performed using any of the above-mentioned electromagnetic precision forming devices for local microstructure of difficult-to-deform metal tubes based on laser heating, including the following steps:

[0016] (1) Place the metal tube to be formed, the mold, and the spiral coil coaxially, and fix the metal tube to the motor with a clamp, and fix the mold with a mold fixing device;

[0017] (2) Activate the positioning device, and position the mold end face and the metal pipe end face by scanning along the axial direction of the mold and the metal pipe, and transmit the information to the control system.

[0018] (3) The control system calculates and determines the displacement of the pipe based on the position of the metal pipe and the position of the local microstructure to be formed. The control system sends instructions to the conveying system to move the pipe precisely to the laser heating station.

[0019] (4) The control system determines the size of the laser heating spot, the laser energy, and the rotation speed and movement program of the metal pipe according to the characteristics of the local microstructure of the pipe to be formed; the control system sends a command to turn on the laser heating device and the infrared thermometer, and at the same time sends a command to start the motor and make the second CNC moving table move according to the movement program to achieve precise laser heating of the area of ​​the metal pipe to be formed.

[0020] (5) After the set temperature is reached, the control system shuts down the laser heating device and stops the motor from rotating. The control system sends instructions to the second CNC moving table to move the metal pipe precisely to the specific position of the mold according to the pipe position information, mold position information and the position information of the microstructure to be formed.

[0021] (6) Close the first switch and the power supply starts to charge the capacitor; open the first switch and close the second switch and the capacitor discharges to the spiral coil to realize the microstructure forming of the precise position of the metal tube;

[0022] (7) Separate the different segments of the mold to achieve demolding of the metal pipe fittings.

[0023] Compared with existing technologies, the advantages of this invention are: high heating efficiency, and the ability to uniformly heat the metal tube to be formed to the set temperature; a more concentrated heating area, which can significantly reduce the heat-affected zone and improve the mechanical properties and service life of the component; the ability to achieve point, line, and surface heating of the metal tube surface, as well as heating of special paths on the surface of the metal tube; the ability to achieve microstructure forming at precise locations of the metal tube by accurately positioning the metal tube and the mold; and the more flexible operation and more uniform forming due to the rotation of the metal tube in conjunction with the spiral coil, which facilitates automation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention.

[0025] Figure 2 This is a schematic diagram of the metal pipe with a partial annular groove formed in Embodiment 1 of the present invention.

[0026] Figure 3 This is a schematic diagram of the cross-section of the segmented mold in the forming device of Embodiment 1 of the present invention.

[0027] Figure 4 This is the helical coil structure used in Embodiment 1 of the present invention.

[0028] Figure 5 This is a schematic diagram of the metal tube with a spiral groove formed according to Embodiment 2 of the present invention.

[0029] Figure 6 This is a schematic diagram of the metal pipe with surface spiral ribs formed according to Embodiment 3 of the present invention.

[0030] Figure 7 This is a schematic diagram of the segmented mold in the forming device of Embodiment 3 of the present invention.

[0031] Figure 8 This is the helical coil structure used in Embodiment 3 of the present invention.

[0032] In the diagram, 1. Control system, 2. Second guide rail, 3. Second CNC moving table, 4. Motor, 5. Fixture, 6. Laser heating device, 7. Infrared thermometer, 8. First guide rail, 9. First CNC moving table, 10. Laser positioning device, 11. Spiral coil, 12. Reinforcing component, 13. Mold, 14. Flap mold fixing device, 15. Second switch, 16. Capacitor, 17. First switch, 18. DC power supply, 19. Metal fitting, 20. Polyimide rod. Detailed Implementation

[0033] The embodiments of this invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this invention. In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this invention patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention patent based on the specific circumstances.

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0036] Example 1

[0037] This embodiment provides an electromagnetic forming device for local microstructures of difficult-to-deform metal tubes based on laser heating. The device is used to form stainless steel tubes with local annular microstructures. The tube has a wall thickness of 0.2 mm, an inner diameter of 40 mm, and the surface microstructure consists of arc-shaped grooves with a radius of 0.5 mm and a depth of 0.3 mm. The center of the grooves is 20 mm from the right end face of the tube. A schematic diagram of the tube structure is shown below. Figure 2 As shown. The dimensions of the annular groove microstructure on the mold match the microstructure of the fitting, and it is 20mm from the left end face of the mold. The mold adopts a segmented design, and the cross-sectional diagram is shown below. Figure 3 As shown, it consists of 5 valves ①-⑤, and each valve is connected to a valve fixing device 14. The spiral coil structure is as follows. Figure 4 As shown, the coil is wrapped with a stainless steel reinforcing sleeve on the outside, and the inner diameter of the coil is 41mm.

[0038] An electromagnetic forming device for local microstructures of difficult-to-deform metal tubular components based on laser heating includes a control system 1, a positioning system, a conveying system, a heating system, and an electromagnetic forming system. The positioning system includes a laser positioning device 10, a first guide rail 8, and a first CNC moving stage 9; the conveying system includes a second guide rail 2, a second CNC moving stage 3, and a motor 4; the heating system includes a laser heating device 6 and an infrared thermometer 7; and the electromagnetic forming system includes a spiral coil 11, a mold 13, a DC power supply 18, a capacitor 16, and a control switch. The first CNC moving stage 9 is arranged on the first guide rail 8, and a laser positioning device 10 is fixed on the first CNC moving stage 9. The second CNC moving stage 3 is arranged on the second guide rail 2, and a motor 4 is fixed on the second CNC moving stage 3. A clamp 5 is provided on the side of the motor 4, which can clamp and fix one end of the metal tube 19. A matching mold 13 is arranged inside the spiral coil 11. The motor 4, clamp 5, metal tube 19, mold 13 and spiral coil 11 are horizontally distributed on the same axis. The metal tube 19 can move in the gap between the spiral coil 11 and the mold 13 with the help of the conveying system.

[0039] Control system 1 is connected to motor 4 and second CNC moving table 3 via cables, and is used to control the speed and displacement of motor and CNC moving table 3. Control system 1 is also connected to laser positioning device 10 and first CNC moving table 9 via cables, and is used to accurately position the mold end and pipe end. Control system 1 is further connected to laser heating device 6 and infrared thermometer 7 via cables, and is used to control the spot size, laser energy, and the on / off state of laser heating device.

[0040] The control switch includes a first switch 17 and a second switch 15. The second switch 15, capacitor 16, and spiral coil 11 are connected in series to form a discharge circuit. The first switch 17 and DC power supply 18 are connected in series and then connected in parallel across the two ends of capacitor 16 to form a charging circuit.

[0041] The process of forming stainless steel pipe fittings with localized annular grooves using the above-mentioned apparatus mainly includes the following steps:

[0042] (1) Place the stainless steel pipe fitting to be formed, the mold, and the spiral coil coaxially, and fix the metal pipe fitting on the motor with a clamp, and fix the mold with a mold fixing device.

[0043] (2) The positioning device used in this embodiment is a laser positioning device. The laser positioning device is turned on and scanned along the axial direction of the mold and the metal pipe to position the left end of the mold and the right end of the metal pipe. The information is then transmitted to the control system. Here, the coordinates of the right end face of the positioning pipe are 150.1 mm and the coordinates of the left end face of the mold are 300.2 mm.

[0044] (3) The control system calculates and determines the displacement of the pipe based on the position of the metal pipe and the position of the local microstructure to be formed. The control system sends an instruction to the conveying system to move the pipe 49.9 mm to the right and move it precisely to the laser heating station. At this time, the position of the right end face of the pipe is 200 mm (the coordinate of the laser heating head is 180 mm).

[0045] (4) Based on the characteristics of the local microstructure of the pipe to be formed, the laser heating spot size is determined to be 1 mm, and the laser energy density is 50 W / cm². 2 The metal pipe rotates at a speed of 10 revolutions per second, and does not require left or right movement during rotation. The control system sends commands to activate the laser heating device and infrared thermometer, and simultaneously sends commands to start the motor to rotate, thereby achieving laser heating of the area of ​​the stainless steel pipe to be formed.

[0046] (5) After the set temperature is reached, the control system shuts down the laser heating device and stops the motor from rotating. The control system sends a command to the second CNC moving table to move the metal tube 140.2 mm to the right to a specific position inside the coil. At this time, the coordinates of the right end face of the tube are 340.2 mm.

[0047] (6) The capacitor is selected as 100μF and the voltage is selected as 8kV. When the first switch is closed, the power supply starts to charge the capacitor; when the first switch is opened and the second switch is closed, the capacitor discharges to the spiral coil, realizing the microstructure forming of the stainless steel pipe fitting with precise position.

[0048] (7) Pull out the petal molds ①-⑤ in sequence to achieve demolding of stainless steel pipe fittings.

[0049] Example 2

[0050] The device used in this embodiment is basically the same as that in Embodiment 1. The difference is that the purpose of this embodiment is to form an arc-shaped spiral groove with a radius of 1 mm and a depth of 0.5 mm on the surface of a titanium alloy thin-walled tube with an inner diameter of 40 mm and a wall thickness of 0.2 mm. The spiral pitch is 30 mm, the number of turns is 3, and the starting position of the groove on the right side is 20 mm from the right end of the tube. Figure 4 As shown. The dimensions of the microstructure on the mold match the required dimensions of the microstructure on the fitting. The starting position of the microstructure on the left side of the mold is 20mm from the left end of the mold.

[0051] The main steps include the following:

[0052] (1) Place the metal tube to be formed, the mold, and the spiral coil coaxially, and fix the metal tube to the motor with a clamp, and fix the mold with a mold fixing device;

[0053] (2) The positioning device used in this embodiment is a laser positioning device. The laser positioning device is turned on and scanned along the axial direction of the mold and the metal pipe to position the left end face of the mold and the right end face of the metal pipe. The information is then transmitted to the control system. Here, the coordinate of the right end face of the pipe is 150.5mm and the coordinate of the left end face of the mold is 300.3mm.

[0054] (3) The control system calculates and determines the displacement of the pipe based on the position of the metal pipe and the position of the local microstructure to be formed. The control system sends an instruction to the conveying system to move the pipe 49.5mm to the right and move it precisely to the laser heating station. At this time, the coordinate of the right end face of the pipe is 200mm (the coordinate of the laser heating head is 180mm).

[0055] (4) Based on the characteristics of the local microstructure of the pipe to be formed, the laser heating spot size was determined to be 2 mm, and the laser energy density was determined to be 50 W / cm². 2 The metal pipe rotates at 3 revolutions per second, and the movement program is: move 90mm to the right, 90mm to the left, 90mm to the right, and so on, repeating continuously at a speed of 90mm / s. The control system sends commands to activate the laser heating device and infrared thermometer, and simultaneously sends commands to start the motor and the second CNC moving table, thereby achieving laser heating of the spiral area on the surface of the titanium alloy pipe.

[0056] (5) After the set temperature is reached, the control system shuts down the laser heating device and stops the motor from rotating. The control system sends a command to the second CNC moving table to move the metal tube precisely 230.3 mm to the right, to a specific position inside the coil. At this time, the coordinates of the right end face of the tube are 430.3 mm.

[0057] (6) The capacitor is selected as 100μF and the voltage is selected as 10kV. When the first switch is closed, the power supply starts to charge the capacitor; when the first switch is opened and the second switch is closed, the capacitor discharges to the spiral coil, realizing the microstructure forming of the titanium alloy tube with precise positioning.

[0058] (7) Pull out the petal molds ①-⑤ in sequence to achieve demolding of titanium alloy pipe fittings.

[0059] Example 3

[0060] The apparatus used in this embodiment is basically the same as that in Embodiment 2. The difference is that the purpose of this embodiment is to form a circular arc-shaped spiral rib with a radius of 1 mm and a depth of 0.5 mm on the surface of a titanium alloy thin-walled tube with an inner diameter of 40 mm and a wall thickness of 0.2 mm. The pitch is 30 mm, the number of turns is 3, and the starting position of the spiral rib on the right side is 20 mm from the right end of the tube. Figure 4 As shown. The dimensions of the microstructure on the mold match the required dimensions of the microstructure on the fitting. The starting position of the microstructure on the left side of the mold is 20mm from the left end of the mold. The mold adopts a segmented design, and the cross-sectional diagram is shown below. Figure 7 As shown, it consists of two lobes ⑥-⑦, and each lobe is connected to a lobe fixing device. The helical coil structure is as follows... Figure 8 As shown, the outer diameter of the coil is 39mm, and a polyimide rod 20 is fixed inside the coil to improve the coil strength.

[0061] The main steps are basically the same as in Example 2. The difference is that in this example, during electromagnetic forming, the coil is located inside the tube and the mold is located outside the tube.

Claims

1. An electromagnetic forming device for local microstructures of difficult-to-deform metal tubular components based on laser heating, comprising a control system, a positioning system, a conveying system, a heating system, and an electromagnetic forming system; the positioning system comprising a positioning device, a first guide rail, and a first CNC moving stage; the conveying system comprising a second guide rail, a second CNC moving stage, and a motor; the heating system comprising a laser heating device and a temperature measuring instrument; the electromagnetic forming system comprising a spiral coil, a mold, a DC power supply, a capacitor, and a control switch; characterized in that, The first CNC moving table is arranged on the first guide rail, and a positioning device is fixed on the first CNC moving table. The second CNC moving table is arranged on the second guide rail, and a motor is fixed on the second CNC moving table. A clamp is provided on the side of the motor, which can clamp and fix one end of the metal tube. A matching mold is arranged on the inner or outer surface of the spiral coil. The motor, clamp, metal tube, mold and spiral coil are horizontally distributed on the same axis. With the help of the conveying system, the metal tube can move in the gap between the spiral coil and the mold. The control system calculates and determines the displacement of the metal pipe based on its position and the position of the microstructure to be formed. The control system then sends instructions to the conveying system to move the pipe precisely to the laser heating station. The control system determines the size of the laser heating spot, the laser energy, and the rotation speed and movement program of the metal tube based on the characteristics of the local microstructure of the tube to be formed. The control system sends instructions to turn on the laser heating device and the infrared thermometer, and at the same time sends instructions to start the motor and make the second CNC moving table move according to the movement program to achieve precise laser heating of the area of ​​the metal tube to be formed. Once the set temperature is reached, the control system shuts down the laser heating device and stops the motor from rotating. Based on the pipe coordinate information, mold coordinate information, and the position information of the microstructure to be formed, the control system sends instructions to the second CNC moving table to precisely move the metal pipe to the electromagnetic forming station.

2. The electromagnetic forming device for local microstructure of difficult-to-deform metal pipes based on laser heating according to claim 1, wherein the control system is connected to the motor and the second CNC moving table via a cable, and is used to control the speed and displacement of the motor and the CNC moving table.

3. The electromagnetic forming device for local microstructure of difficult-to-deform metal pipes based on laser heating according to claim 1, wherein the control system is connected to the positioning instrument and the first CNC moving table via cables for precise positioning of each component.

4. The electromagnetic forming device for local microstructure of difficult-to-deform metal pipes based on laser heating according to claim 1, wherein the positioning instrument is a laser positioning instrument or an ultrasonic positioning instrument.

5. The electromagnetic forming device for local microstructure of difficult-to-deform metal pipes based on laser heating according to claim 1, wherein the control system is connected to the laser heating device and the temperature measuring device via cables, and is used to control the spot size, laser energy, and the opening and closing of the laser heating device.

6. The electromagnetic forming device for local microstructure of difficult-to-deform metal tubular parts based on laser heating according to claim 1, wherein the spiral coil is equipped with reinforcing components on the outside or inside to improve the strength of the spiral coil.

7. The electromagnetic forming device for local microstructure of difficult-to-deform metal tubes based on laser heating according to claim 1, wherein the control switch includes a first switch and a second switch, the second switch, a capacitor, and a spiral coil are connected in series to form a discharge circuit, and the first switch and a DC power supply are connected in series and then connected in parallel across the two ends of the capacitor to form a charging circuit.

8. The electromagnetic forming device for local microstructure of difficult-to-deform metal pipes based on laser heating according to claim 1, wherein the mold is designed in a segmented manner to facilitate demolding after the metal pipe is formed, and each segment mold is connected to a segment mold fixing device.

9. The electromagnetic forming device for local microstructure of difficult-to-deform metal tubes based on laser heating according to claim 1, wherein the diameter of the spiral coil is matched with the diameter of the metal tube, and when the diameter of the metal tube is reduced, the diameter of the spiral coil is 0.1-10 mm larger than the diameter of the metal tube, and when the diameter of the metal tube is increased, the diameter of the spiral coil is 0.1-10 mm smaller than the diameter of the metal tube.

10. A method for local microstructure electromagnetic forming of difficult-to-deform metal tubular components based on laser heating, characterized in that... The forming process using any one of the laser-heated electromagnetic precision forming devices for local microstructures of difficult-to-deform metal tubing as described in claims 1 to 9 includes the following steps: (1) Place the metal tube to be formed, the mold, and the spiral coil coaxially, and fix the metal tube to the motor with a clamp, and fix the mold with a mold fixing device; (2) Activate the positioning device, and position the mold end face and the metal pipe end face by scanning along the axial direction of the mold and the metal pipe, and transmit the information to the control system; (3) The control system calculates and determines the displacement of the pipe based on the position of the metal pipe and the position of the local microstructure to be formed. The control system sends an instruction to the conveying system to move the pipe precisely to the laser heating station. (4) The control system determines the size of the laser heating spot, the laser energy, and the rotation speed and movement program of the metal pipe according to the characteristics of the local microstructure of the pipe to be formed; the control system sends an instruction to turn on the laser heating device and the infrared thermometer, and at the same time sends an instruction to start the motor and make the second CNC moving table move according to the movement program to achieve precise laser heating of the area of ​​the metal pipe to be formed. (5) After the set temperature is reached, the control system shuts down the laser heating device and stops the motor from rotating; the control system sends a command to the second CNC moving table to move the metal pipe precisely to the electromagnetic forming station according to the pipe coordinate information, mold coordinate information and the position information of the microstructure to be formed. (6) When the first switch is closed, the power supply begins to charge the capacitor; when the first switch is opened and the second switch is closed, the capacitor discharges to the spiral coil, thereby achieving the microstructure forming of the precise position of the metal tube. (7) Separate the different segments of the mold to achieve demolding of the metal pipe fitting.

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