Current-assisted spinning forming device and method

Abstract

The invention relates to the technical field of spinning forming, in particular to a current-assisted spinning forming device and method.The current-assisted spinning forming device comprises a core mold switching disc arranged on a machine tool, a core mold insulating base plate is fixed to the core mold switching disc, and a core mold penetrating through the core mold insulating base plate and connected with a main shaft of the machine tool is rotationally installed on the core mold switching disc; the clamping assembly is arranged on the machine tool, and a metal blank abutting against the core mold abuts against the clamping assembly; the workpiece forming assembly is arranged on the machine tool and used for machining the metal blank; the current applying mechanism is arranged on the workpiece forming assembly, and the workpiece forming assembly can drive the current applying mechanism to move to the position matched with the metal blank so as to heat the metal blank. And the pulse current is introduced into the spinning plastic deformation area.

Description

Technical Field

[0001] The invention relates to the technical field of spin forming, in particular to a current-assisted spin forming device and method. Background Art

[0002] With the increasing demand for lightweight and safety in the fields of aviation, aerospace, transportation, etc., thin-walled complex hollow rotating parts made of high-strength and difficult-to-deform materials have been increasingly used.

[0003] Spinning is a typical point-loaded plastic local plastic forming process with the characteristics of low forming force, simple forming tools and high material utilization. It is one of the advantageous technologies for manufacturing the above-mentioned thin-walled complex hollow rotating body parts. However, this type of component has a large deformation resistance during spin forming, and forming defects are very likely to occur, which greatly increases the manufacturing difficulty.

[0004] In recent years, researchers have proposed that electric current can be passed through the spinning process to use the electroplastic effect of metal materials to assist in the manufacture of parts, which is called current-assisted spinning. However, the existing current-assisted spinning technology has at least one electrode in direct contact with the rotating blank. This dynamic electrical contact not only produces the aforementioned electric spark discharge problem, but also has a large contact resistance. According to Ohm's law, the current will be concentrated in this area, making the current density distribution on the blank uneven. In the process of electric-assisted spinning, the uneven distribution of current will lead to significant temperature gradients in various parts, thereby aggravating the uneven deformation of spinning and making the workpiece very prone to cracking. Summary of the invention

[0005] The object of the present invention is to provide a current-assisted spinning forming device and method to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A current-assisted spinning forming device, comprising:

[0008] A core mold adapter plate is arranged on a machine tool, a core mold insulating pad is fixed on the core mold adapter plate, and a core mold penetrating the core mold insulating pad and connected to the main shaft of the machine tool is rotatably mounted on the core mold adapter plate;

[0009] A clamping assembly is arranged on the machine tool, and a metal blank abutting against the core mold is abutted on the clamping assembly;

[0010] A workpiece forming assembly, arranged on the machine tool, for processing the metal blank;

[0011] The current applying mechanism is arranged on the workpiece forming assembly, and the workpiece forming assembly can drive the current applying mechanism to move to a position cooperating with the metal blank so as to heat the metal blank.

[0012] As a further solution of the present invention, the clamping assembly includes a tail top insulating pad slidably mounted on the machine tool, a tail top is rotatably mounted on the tail top insulating pad, and the tail top is in contact with the metal blank.

[0013] As a further solution of the present invention: the workpiece forming assembly includes a rotating wheel frame and a 90-degree tool rod slidably arranged on the machine tool, and supporting insulating pads are fixed on the rotating wheel frame and the 90-degree tool rod respectively, and symmetrically arranged insulating sleeves are fixed on the 90-degree tool rod. A rotating wheel is rotatably installed on the rotating wheel frame, and the rotating wheel is in contact with the metal blank.

[0014] As a further solution of the present invention: the current applying mechanism includes a first conductive head mechanism connecting plate respectively fixedly mounted on the rotating wheel frame, a second conductive head mechanism connecting plate is fixed on the 90-degree knife rod, and a guide assembly is arranged on the first conductive head mechanism connecting plate.

[0015] As a further solution of the present invention: the guide assembly includes longitudinal guide rails fixedly mounted on the first conductive head mechanism connecting plate and the second conductive head mechanism connecting plate respectively, a longitudinal slider is slidably mounted on the longitudinal guide rail, and a guiding structure is provided on the longitudinal slider.

[0016] As a further solution of the present invention: the guiding structure includes a transverse and longitudinal guide rail adapter plate fixedly mounted on the longitudinal slider, a transverse guide rail is fixed on the transverse and longitudinal guide rail adapter plate, a transverse slider is slidably mounted on the transverse guide rail, and a conductive head mechanism is fixed on the transverse slider.

[0017] As a further solution of the present invention: the conductive head mechanism includes a fixing part fixedly connected to the transverse slider, a sliding rod is slidably installed in the fixing part, a compression spring is sleeved in the sliding rod, and a tightening screw abutting against the compression spring is movably installed in the fixing part.

[0018] As a further solution of the present invention: the conductive head mechanism also includes a transition part fixedly mounted on the sliding rod, an annular clamping ring is fixed to the outer wall of the transition part, a connecting part is fixed inside the annular clamping ring, an end portion is fixed at one end of the connecting part away from the annular clamping ring, and a cooling water baffle is fixed inside the connecting part.

[0019] A current-assisted spinning forming method comprises the following steps:

[0020] Step 1: Install the tooling mold and the blank, install the spinning core mold, the core mold adapter plate, the tail top, the rotating wheel frame and the 90-degree tool rod, the core mold insulating pad, the supporting insulating pad, the tail top insulating pad and the insulating sleeve on the machine tool, fix the current application mechanism on the rotating wheel frame and the 90-degree tool rod respectively, and clamp the metal blank on the core mold with the tail top;

[0021] Step 2: Apply grease. Apply high-temperature resistant copper-based grease on the front and back of the metal blank;

[0022] Step 3: Adjust the initial relative positions of the conductive head mechanism, the rotating wheel and the metal blank, move the rotating wheel frame to make the rotating wheel in the starting position; move the 90-degree tool bar, and adjust the transverse guide rail and the longitudinal guide rail as well as the longitudinal slider and the transverse slider so that the conductive head mechanism on the tail top side and the rotating wheel are symmetrically arranged about the tail top; adjust the transverse guide rail and the longitudinal guide rail as well as the longitudinal slider and the transverse slider so that the conductive head mechanism on the core mold side is located behind the rotating wheel; adjust and tighten the screws so that the end of the conductive head mechanism is in close contact with the metal blank;

[0023] Step 4: introducing circulating cooling water into the conductive head mechanism, and connecting the pulse power supply and the conductive head mechanism with a wire; the output frequency of the pulse power supply is 100-600Hz, the output duty cycle is 0-100%, and the output peak current is 1-2500A;

[0024] Step 5: Rotate the core mold and preheat the blank, start the machine tool spindle, and make the rotating core mold, tail top and blank rotate together at a speed v; the spindle speed can be controlled to be 20-600r / min; control the conductive head mechanism on the tail top side and the core mold side to reciprocate along the radial direction of the metal blank, so that the overall temperature of the metal blank reaches the rotatable range and reduces the temperature gradient of each part;

[0025] Step 6: Spinning: After preheating the metal blank, the conductive head mechanism moves to the relative position determined in step 3; through CNC programming, the rotary wheel frame and the 90-degree tool bar are controlled to move synchronously according to the set trajectory to complete the current-assisted spinning; the maximum rotary wheel feed speed is 3500mm / min;

[0026] Step 7: After the spinning is completed, turn off the pulse power supply and circulating cooling water; stop the spindle rotation; remove the conductive head mechanism; remove the tail top; and remove the spun part.

[0027] Compared with the prior art, the beneficial effect of the present invention is that the present application can introduce the current output by the pulse power supply into the spinning plastic deformation area. By utilizing the electroplastic effect generated by the current, the dislocation movement and organizational evolution can be accelerated, thereby reducing the material deformation resistance and improving the quality of component spinning. At the same time, the end of the conductive head mechanism is made of tungsten-copper alloy, the end is made of compression spring to make close contact with the metal blank, the high-temperature resistant copper-based grease is used to increase the conductivity of the contact area, and the circulating cooling water is used to reduce the temperature of the contact area, which can effectively suppress the electric spark discharge in the contact area between the conductive head mechanism and the metal blank. On the one hand, the surface roughness of the formed component is improved and the spinning precision is improved; on the other hand, the loss of the rotary wheel profile is avoided, the service life of the rotary wheel is extended, and the processing cost is reduced.

[0028] By reciprocating the conductive head mechanism in the radial direction of the metal blank before spinning, the overall temperature of the metal blank can be increased, significantly reducing the temperature gradient in each part. The increase in the overall temperature uniformity of the metal blank helps to reduce the degree of uneven deformation during spinning and inhibit the occurrence of workpiece cracking. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The present invention is a schematic structural diagram of an embodiment of a current-assisted spinning forming device.

[0030] Figure 2 It is a partial top view structural schematic diagram of an embodiment of a current-assisted spinning forming device.

[0031] Figure 3 This is a schematic structural diagram of a conductive head mechanism in an embodiment of a current-assisted spinning forming device.

[0032] Figure 4 This is a schematic diagram of the half-section structure of a conductive head mechanism in one embodiment of a current-assisted spinning forming device.

[0033] In the figure: 1. core mold adapter plate; 2. core mold insulating pad; 3. core mold; 4. longitudinal guide rail; 5. longitudinal slider; 6. transverse guide rail; 7. transverse and longitudinal guide rail adapter plate; 8. transverse slider; 9. first conductive head mechanism connecting plate; 10. supporting insulating pad; 11. rotating wheel frame; 12. rotating wheel; 13. tail top; 14. tail top insulating pad; 15. second conductive head mechanism connecting plate; 16. 90 degree knife bar; 17. insulating sleeve; 18. metal blank; 19. conductive head mechanism; 191. end; 192. connecting part; 193. cooling water baffle; 194. annular clamp; 195. adapter; 196. slide rod; 197. fixing part; 198. compression spring; 199. tightening screw. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0036] See also Figure 1 to Figure 4 In an embodiment of the present invention, a current-assisted spinning forming device includes:

[0037] A core mold adapter plate 1 is arranged on a machine tool, a core mold insulating pad 2 is fixed on the core mold adapter plate 1, and a core mold 3 penetrating the core mold insulating pad 2 and connected to the main shaft of the machine tool is rotatably mounted on the core mold adapter plate 1;

[0038] A clamping assembly is arranged on the machine tool, and a metal blank 18 abutting against the core mold 3 is abutted on the clamping assembly. The clamping assembly includes a tail top insulating pad 14 slidably mounted on the machine tool, and a tail top 13 is rotatably mounted on the tail top insulating pad 14, and the tail top 13 is in contact with the metal blank 18.

[0039] In detail, when processing the metal blank 18, it is necessary to fix the metal blank 18 between the core mold 3 and the tail top 13 through the tail top 13. Therefore, the metal blank 18 can be placed between the tail top 13 and the core mold 3, and the tail top 13 can be controlled to move toward the core mold 3 through the tail top insulating pad 14. When the two sides of the metal blank 18 are respectively in contact with the core mold 3 and the tail top 13, the metal blank 18 is fixed. At this time, the core mold 3 can be controlled to rotate through the machine tool spindle to drive the metal blank 18 and the tail top 13 to rotate, wherein the tail top insulating pad 14 can be pushed by a cylinder, or its position can be adjusted by a screw rod, which is not limited in this application.

[0040] A workpiece forming assembly is arranged on the machine tool and is used to process the metal blank 18. The workpiece forming assembly includes a rotating wheel frame 11 and a 90-degree tool rod 16 which are slidably arranged on the machine tool. Support insulating pads 10 are fixed on the rotating wheel frame 11 and the 90-degree tool rod 16 respectively. A symmetrically arranged insulating sleeve 17 is fixed on the 90-degree tool rod 16. A rotating wheel 12 is rotatably mounted on the rotating wheel frame 11, and the rotating wheel 12 is in contact with the metal blank 18.

[0041] It should be noted that the 90-degree tool rod 16 is used to carry the current application mechanism. When the metal blank 18 needs to be processed, the position of the rotating wheel frame 11 and the 90-degree tool rod 16 can be adjusted to make the current application mechanism move to the desired position, and the position of the rotating wheel 12 can be adjusted so that the rotating wheel 12 abuts against the surface of the metal blank. At this time, the rotating wheel 12 is in the starting position, wherein the core mold insulating pad 2, the supporting insulating pad 10, the tail top insulating pad 14, and the insulating sleeve 17 are made of POM plastic, which are used to isolate the current on the spinning tooling mold to prevent damage to the machine tool. The rotating wheel frame 11 and the 90-degree tool rod 16 can be moved on the machine tool, and after the movement is completed, they are fixed by bolts. The position can also be adjusted by other means. This is an application of the prior art and is not limited to this application.

[0042] A current application mechanism is arranged on the workpiece forming component, and the workpiece forming component can drive the current application mechanism to move to a position cooperating with the metal blank 18 to heat the metal blank 18. The current application mechanism includes a first conductive head mechanism connecting plate 9 respectively fixedly mounted on the rotating wheel frame 11, and a second conductive head mechanism connecting plate 15 is fixed on the 90-degree tool rod 16. A guide assembly is arranged on the first conductive head mechanism connecting plate 9, wherein the guide assembly includes a longitudinal guide rail 4 respectively fixedly mounted on the first conductive head mechanism connecting plate 9 and the second conductive head mechanism connecting plate 15, a longitudinal slider 5 is slidably mounted on the longitudinal guide rail 4, and a guide structure is arranged on the longitudinal slider 5. The above-mentioned guide structure includes a transverse and longitudinal guide rail adapter plate 7 fixedly mounted on the longitudinal slider 5, a transverse guide rail 6 is fixed on the transverse and longitudinal guide rail adapter plate 7, a transverse slider 8 is slidably mounted on the transverse guide rail 6, and a conductive head mechanism 19 is fixed on the transverse slider 8.

[0043] Furthermore, when it is necessary to adjust the position of the conductive head mechanism 19, the longitudinal slider 5 can be moved at this time to adjust the distance between the conductive head mechanism 19 and the metal blank 18 through the transverse guide rail 6 and the transverse slider 8. When the longitudinal position adjustment of the conductive head mechanism 19 is completed, the transverse slider 8 can be controlled to slide along the transverse guide rail 6 to adjust the distance between the conductive head mechanism 19 and the rotation center of the metal blank 18, so that the conductive head mechanism 19 on the tail top 13 side and the rotating wheel 12 are symmetrically arranged about the tail top 13, and the conductive head mechanism 19 on the core mold 3 side is located behind the rotating wheel 12.

[0044] The conductive head mechanism 19 includes a fixing portion 197 fixedly connected to the transverse slider 8, a slide rod 196 is slidably installed in the fixing portion 197, a compression spring 198 is sleeved in the slide rod 196, and a tightening screw 199 abutting against the compression spring 198 is movably installed in the fixing portion 197, wherein the conductive head mechanism 19 also includes a transition portion 195 fixedly installed on the slide rod 196, an annular retaining ring 194 is fixed to the outer wall of the transition portion 195, a connecting portion 192 is fixed in the annular retaining ring 194, an end portion 191 is fixed to the end of the connecting portion 192 facing away from the annular retaining ring 194, and a cooling water baffle 193 is fixed in the connecting portion 192.

[0045] Furthermore, the annular collar 194 is connected to the pulse power supply to realize the introduction / extraction of current. The connecting part 192 is internally passed with circulating cooling water to reduce the temperature of the end 191. A compression spring 198 is placed between the slide rod 196 and the fixing part 197. By adjusting the screw-in depth of the tightening screw 199, the end 191 can be in close contact with the metal blank 18 under the pressure of the compression spring 198. In order to further increase the conductivity of the contact area, the spherical end 191 is made of tungsten-copper alloy, and at the same time, it is threadedly connected to the connecting part 192 for easy removal and replacement. The use of high-temperature resistant copper-based grease to lubricate between the end 191 and the blank 18 can also increase the conductivity of the contact area. After the position adjustment of the conductive head mechanism 19 is completed, the tightening screw 199 can be adjusted to make the conductive head mechanism 19 The end 191 is in close contact with the metal blank 18. At this time, circulating cooling water can be introduced into the connecting part 192. Under the action of the cooling water baffle 193, the circulation range of the cooling water is increased to enhance the cooling effect on the conductive head mechanism 19. At the same time, the pulse power supply and the conductive head mechanism 19 are connected by a wire; the output frequency of the pulse power supply is 100-600Hz, the output duty cycle is 0-100%, and the output peak current is 1-2500A. At this time, the machine tool spindle controls the core mold 3, the tail top 13, and the metal blank 18 to rotate, and controls the conductive head mechanism 19 on the side of the tail top 13 and the core mold 3 to reciprocate along the radial direction of the metal blank 18, so that the overall temperature of the metal blank 18 reaches the rotatable range and reduces the temperature gradient of each part. At this time, the rotating wheel 12 rotates to process the metal blank 18.

[0046] Preferably, under the action of the conductive head mechanism 19, by utilizing the electroplastic effect generated by the electric current, the dislocation movement and the organizational evolution can be accelerated, thereby reducing the material deformation resistance and improving the quality of the component spinning. At the same time, the use of grease to increase the conductivity of the contact area and the use of circulating cooling water to reduce the temperature of the contact area can effectively suppress the electric spark discharge in the contact area between the conductive head mechanism 19 and the metal blank 18. On the one hand, the surface roughness of the formed component is improved and the spinning precision is improved; on the other hand, the loss of the profile of the rotating wheel 12 is avoided, the service life of the rotating wheel 12 is extended, and the processing cost is reduced. By reciprocating the conductive head mechanism 19 in the radial direction of the metal blank 18 at the front of the spinning forming, the overall temperature of the metal blank 18 can be increased, and the temperature gradient existing in each part can be significantly reduced. The increase in the uniformity of the overall temperature of the metal blank 18 helps to reduce the degree of uneven deformation during spinning and suppress the occurrence of workpiece cracking.

[0047] A current-assisted spinning forming method comprises the following steps:

[0048] Step 1: Install the tooling mold and the blank, install the spinning core mold 3, the core mold adapter plate 1, the tail top 13, the rotating wheel frame 11 and the 90-degree tool rod 16 and the core mold insulating pad 2, the supporting insulating pad 10, the tail top insulating pad 14 and the insulating sleeve 17 on the machine tool, fix the current application mechanism on the rotating wheel frame 11 and the 90-degree tool rod 16 respectively, and clamp the metal blank 18 on the core mold 3 with the tail top 13;

[0049] Step 2: Apply grease, and apply high temperature resistant copper-based grease on the front and back sides of the metal blank 18;

[0050] Step 3: Adjust the initial relative positions of the conductive head mechanism 19, the rotating wheel 12 and the metal blank 18, move the rotating wheel frame 11, and make the rotating wheel 12 in the rotating position; move the 90-degree arbor 16, and adjust the transverse guide rail 6 and the longitudinal guide rail 4 as well as the longitudinal slider 5 and the transverse slider 8, so that the conductive head mechanism 19 on the tail top 13 side and the rotating wheel 12 are symmetrically arranged about the tail top 13; adjust the transverse guide rail 6 and the longitudinal guide rail 4 as well as the longitudinal slider 5 and the transverse slider 8, so that the conductive head mechanism 19 on the core mold 3 side is located behind the rotating wheel 12; adjust and tighten the screw 199, so that the end 191 of the conductive head mechanism 19 is in close contact with the metal blank 18;

[0051] Step 4: circulating cooling water is introduced into the conductive head mechanism 19, and the pulse power supply is connected to the conductive head mechanism 19 with a wire; the output frequency of the pulse power supply is 100-600Hz, the output duty cycle is 0-100%, and the output peak current is 1-2500A;

[0052] Step 5: Rotate the core mold 3 and preheat the blank, start the machine tool spindle, and rotate the core mold 3, the tail top 13 and the blank 18 together at a speed v; the spindle speed can be controlled to be 20-600r / min; control the conductive head mechanism 19 on the side of the tail top 13 and the side of the core mold 3 to reciprocate along the radial direction of the metal blank 18, so that the overall temperature of the metal blank 18 reaches the rotatable range, and the temperature gradient existing in each part is reduced;

[0053] Step 6: Spinning, after preheating the metal blank 18, the conductive head mechanism 19 moves to the relative position determined in step 3; through CNC programming, the rotary wheel frame 11 and the 90-degree cutter bar 16 are controlled to move synchronously according to the set trajectory to complete the current-assisted spinning; the maximum rotary wheel feed speed is 3500 mm / min;

[0054] Step 7: After the spinning is completed, turn off the pulse power supply and circulating cooling water; stop the main shaft rotation; remove the conductive head mechanism 19; remove the tail top 13; and remove the spinning part.

[0055] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0056] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A current-assisted spinning forming device and method, characterized in that: include: A core mold transfer plate (1) is arranged on a machine tool, a core mold insulating pad (2) is fixed on the core mold transfer plate (1), and a core mold (3) penetrating the core mold insulating pad (2) and connected to the main shaft of the machine tool is rotatably mounted on the core mold transfer plate (1); A clamping assembly is arranged on the machine tool, and a metal blank (18) abutting against the core mold (3) is abutted on the clamping assembly; a workpiece forming assembly, arranged on the machine tool, for processing the metal blank (18); A current applying mechanism is arranged on the workpiece forming assembly, and the workpiece forming assembly can drive the current applying mechanism to move to a position cooperating with the metal blank (18) so as to heat the metal blank (18).

2. A current-assisted spinning forming device and method according to claim 1, characterized in that: The clamping assembly comprises a tail top insulating pad (14) slidably mounted on the machine tool, a tail top (13) being rotatably mounted on the tail top insulating pad (14), and the tail top (13) being in contact with the metal blank (18).

3. The current-assisted spinning forming device and method according to claim 1, characterized in that: The workpiece forming assembly comprises a rotating wheel frame (11) and a (90) degree tool rod (16) slidably arranged on the machine tool, wherein the rotating wheel frame (11) and the (90) degree tool rod (16) are respectively fixed with supporting insulating pads (10), and the (90) degree tool rod (16) is fixed with symmetrically arranged insulating sleeves (17), and a rotating wheel (12) is rotatably mounted on the rotating wheel frame (11), and the rotating wheel (12) is in contact with the metal blank (18).

4. A current-assisted spinning forming device and method according to claim 3, characterized in that: The current applying mechanism comprises a first conductive head mechanism connecting plate (9) respectively fixedly mounted on the rotating wheel frame (11), a second conductive head mechanism connecting plate (15) is fixed on the (90) degree knife rod (16), and a guide assembly is arranged on the first conductive head mechanism connecting plate (9).

5. The current-assisted spinning forming device and method according to claim 4, characterized in that: The guide assembly comprises longitudinal guide rails (4) respectively fixedly mounted on the first conductive head mechanism connecting plate (9) and the second conductive head mechanism connecting plate (15), a longitudinal slider (5) being slidably mounted on the longitudinal guide rails (4), and a guiding structure being arranged on the longitudinal slider (5).

6. A current-assisted spinning forming device and method according to claim 5, characterized in that: The guide structure comprises a transverse and longitudinal guide rail adapter plate (7) fixedly mounted on the longitudinal slider (5), a transverse guide rail (6) being fixed on the transverse and longitudinal guide rail adapter plate (7), a transverse slider (8) being slidably mounted on the transverse guide rail (6), and a conductive head mechanism (19) being fixed on the transverse slider (8).

7. A current-assisted spinning forming device and method according to claim 6, characterized in that: The conductive head mechanism (19) comprises a fixing portion (197) fixedly connected to the transverse slider (8), a sliding rod (196) is slidably installed in the fixing portion (197), a compression spring (198) is sleeved in the sliding rod (196), and a tightening screw (199) abutting against the compression spring (198) is movably installed in the fixing portion (197).

8. The current-assisted spinning forming device and method according to claim 7, characterized in that: The conductive head mechanism (19) also includes a transition portion (195) fixedly mounted on the slide rod (196), an annular clamp (194) being fixed on the outer wall of the transition portion (195), a connecting portion (192) being fixed inside the annular clamp (194), an end portion (191) being fixed at one end of the connecting portion (192) facing away from the annular clamp (194), and a cooling water baffle (193) being fixed inside the connecting portion (192).

9. A current-assisted spinning forming method, using the current-assisted spinning forming device according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Install the tooling mold and the blank, install the spinning core mold (3), the core mold adapter plate (1), the tail top (13), the rotating wheel frame (11) and the (90) degree tool rod (16) and the core mold insulating pad (2), the supporting insulating pad (10), the tail top insulating pad (14) and the insulating sleeve (17) on the machine tool, fix the current applying mechanism on the rotating wheel frame (11) and the (90) degree tool rod (16) respectively, and use the tail top (13) to clamp the metal blank (18) on the core mold (3); Step 2: Apply lubricating grease, and apply high temperature resistant copper-based lubricating grease on the front and back sides of the metal blank (18); Step 3: Adjust the initial relative positions of the conductive head mechanism (19), the rotating wheel (12) and the metal blank (18), move the rotating wheel frame (11) so that the rotating wheel (12) is in the rotating position; move the knife bar (16) by (90) degrees, and adjust the transverse guide rail (6) and the longitudinal guide rail (4) as well as the longitudinal slider (5) and the transverse slider (8) so that the conductive head mechanism (19) on the tail top (13) side and the rotating wheel (12) are symmetrically arranged about the tail top (13); adjust the transverse guide rail (6) and the longitudinal guide rail (4) as well as the longitudinal slider (5) and the transverse slider (8) so that the conductive head mechanism (19) on the core mold (3) side is located behind the rotating wheel (12); adjust the tightening screw (199) so that the end (191) of the conductive head mechanism (19) is in close contact with the metal blank (18); Step 4: circulating cooling water is introduced into the conductive head mechanism (19), and a pulse power supply is connected to the conductive head mechanism (19) with a wire; the output frequency of the pulse power supply is 100-600 Hz, the output duty cycle is 0-100%, and the output peak current is 1-2500 A; Step 5: Rotate the core mold (3) and preheat the blank, start the machine tool spindle, and make the rotating core mold (3), the tail top (13) and the blank (18) rotate together at a speed v; the spindle speed can be controlled to be 20-600r / min; control the conductive head mechanism (19) on the tail top (13) side and the core mold (3) side to reciprocate along the radial direction of the metal blank (18), so that the overall temperature of the metal blank (18) reaches the rotatable range, and reduces the temperature gradient existing in each part; Step 6: Spinning, after preheating the metal blank (18), the conductive head mechanism (19) moves to the relative position determined in step 3; through CNC programming, the rotary wheel frame (11) and the (90) degree tool rod (16) are controlled to move synchronously according to the set trajectory to complete the current-assisted spinning; the maximum rotary wheel feed speed is 3500 mm / min; Step 7: After the spinning is completed, turn off the pulse power supply and circulating cooling water; stop the main shaft rotation; remove the conductive head mechanism (19); remove the tail top (13); and remove the spinning part.

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