Electrically-assisted spinning forming device and method

Abstract

The invention relates to the technical field of spinning forming, in particular to an electric auxiliary spinning forming device and method.The electric auxiliary spinning forming device comprises a clamping assembly arranged on a machine tool and used for clamping a metal blank; the workpiece forming assembly is arranged on the machine tool and used for conducting spinning plastic machining on the metal blank; the current applying mechanism is arranged on the workpiece forming assembly and makes close contact with the metal blank, and the workpiece forming assembly can drive the current applying mechanism to synchronously move so as to conduct electric heating treatment on the metal blank. And electric spark discharge of the contact area of the current applying mechanism and the blank can be effectively restrained, the temperature gradient existing in all parts of the blank is remarkably reduced, and spinning forming of metal difficult to deform is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of spin forming, in particular to an electric-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 electric-assisted spinning. However, most of the existing electric-assisted spinning technology solutions use the direct contact between the spinning wheel and the blank to conduct current. Under this form of electrical contact, the contact area changes continuously. On the one hand, it is very easy to produce electric spark discharge, ablate the surface of the component and the spinning wheel profile, and reduce the forming accuracy of the component; on the other hand, it has a large contact resistance. According to Ohm's law, the current will be concentrated in this area, making the current density and temperature distribution on the blank uneven, thereby aggravating the uneven deformation of spinning and making the workpiece very easy to crack. Summary of the invention

[0005] The object of the present invention is to provide an electric-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] An electric-assisted spinning forming device, comprising:

[0008] A clamping assembly, arranged on the machine tool, for clamping a metal blank;

[0009] A workpiece forming assembly, arranged on the machine tool, for performing spinning plastic processing on the metal blank;

[0010] The current applying mechanism is arranged on the workpiece forming assembly and is in close contact with the metal blank. The workpiece forming assembly can drive the current applying mechanism to move synchronously so as to perform electrical heating treatment on the metal blank.

[0011] As a further solution of the present invention: the clamping assembly includes a core mold adapter plate connected to the machine tool spindle bolt / nut, a core mold insulating pad is fixed on the core mold adapter plate, a core mold penetrating the core mold insulating pad is installed on the core mold adapter plate, the core mold and the tail top jointly clamp the metal blank, the tail top is screwed to the machine tool tailstock, and a tail top insulating pad is fixed between the tail top and the machine tool tailstock.

[0012] As a further solution of the present invention: the workpiece forming assembly includes a rotating wheel frame and a 90-degree tool rod screwed to the machine tool slide, and supporting insulating pads and insulating sleeves are respectively fixed between the machine tool slide, the rotating wheel frame and the 90-degree tool rod. A rotating wheel is rotatably mounted on the rotating wheel frame, and the rotating wheel is in close contact with the metal blank and moves according to a set trajectory to form the metal blank.

[0013] As a further solution of the present invention: the current application 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 guide components are arranged on the first conductive head mechanism connecting plate and the second conductive head mechanism connecting plate.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] As a further solution of the present invention: the conductive head mechanism also includes a connecting part threadedly mounted on the sliding rod, the connecting part is threadedly connected to the connecting part, a cooling water baffle is fixed inside the connecting part, the connecting part is threadedly connected to the end part, an annular clamping ring is fixed to the connecting part and the outer wall of the connecting part, the annular clamping ring consists of two identical parts, one end is clamped by two sets of bolts and nuts, and the other end is connected to the positive / negative poles of the pulse power supply.

[0018] An electric-assisted spinning forming method comprises the following steps:

[0019] 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, the rotating wheel 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;

[0020] Step 2: Apply grease. Apply high-temperature resistant copper-based grease on the front and back of the metal blank;

[0021] Step 3: Adjust the initial relative positions of the conductive head mechanism, the rotary wheel and the metal blank, and move the rotary wheel frame by controlling the machine tool slide to make the rotary wheel in the starting position; control the machine tool slide to move the tool bar 90 degrees, 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 rotary 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 rotary wheel; adjust and tighten the screws to make the end of the conductive head mechanism in close contact with the metal blank;

[0022] 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;

[0023] Step 5: Rotate the core mold and preheat the metal blank, start the machine tool spindle, and make the rotating core mold, tail top and metal blank rotate together at a speed v; start the pulse power supply; by moving the machine tool slide, 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;

[0024] 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 spinning wheel frame and the 90-degree tool bar are controlled to move synchronously according to the set trajectory to complete the electric-assisted spinning;

[0025] 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.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention can introduce the current output by the pulse power supply into the spinning plastic deformation area by arranging the current applying mechanism on the front and back sides of the metal blank and adjusting its relative position with the action area of ​​the rotary wheel. 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 the 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 conductivity of the contact area is increased by high-temperature resistant copper-based grease, and the temperature of the contact area is reduced by circulating cooling water, 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 forming accuracy 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.

[0027] 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

[0028] Figure 1 The present invention is a schematic structural diagram of an embodiment of an electric-assisted spinning forming device.

[0029] Figure 2 It is a schematic diagram of a partial top view of the structure of an embodiment of an electric-assisted spinning forming device.

[0030] Figure 3 It is a schematic structural diagram of a conductive head mechanism in one embodiment of an electric-assisted spinning forming device.

[0031] Figure 4 This is a schematic diagram of the half-section structure of a conductive head mechanism in one embodiment of an electric-assisted spinning forming device.

[0032] 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

[0033] 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.

[0034] 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.

[0035] See also Figure 1 to Figure 4 In an embodiment of the present invention, an electric-assisted spinning forming device includes:

[0036] A clamping assembly is arranged on a machine tool and is used to clamp a metal blank 18. The clamping assembly includes a core mold adapter plate 1 connected to the machine tool spindle bolt / nut, a core mold insulating pad 2 is fixed on the core mold adapter plate 1, a core mold 3 penetrating the core mold insulating pad 2 is installed on the core mold adapter plate 1, the core mold 3 and the tail top 13 jointly clamp the metal blank 18, the tail top 13 is screwed to the machine tool tailstock, and a tail top insulating pad 14 is fixed between the tail top 13 and the machine tool tailstock.

[0037] 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 stock of the machine tool. 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 stock of the machine tool. 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. The tail stock can be pushed by a hydraulic cylinder, or its position can be adjusted by a screw rod, which is not limited in this application.

[0038] A workpiece forming assembly is arranged on the machine tool and is used for performing spinning plastic processing on the metal blank 18. The workpiece forming assembly includes a rotating wheel frame 11 and a 90-degree tool rod 16 which are screwed to the machine tool slide. A supporting insulating pad 10 and an insulating sleeve 17 are respectively fixed between the machine tool slide and the rotating wheel frame 11 and the 90-degree tool rod 16. A rotating wheel 12 is rotatably mounted on the rotating wheel frame 11. The rotating wheel 12 is in close contact with the metal blank 18 and moves according to a set trajectory to form the metal blank 18.

[0039] 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 rotary wheel frame 11 and the 90-degree tool rod 16 can be adjusted through the machine tool slide to make the current application mechanism and the rotary wheel 12 move to the required position. Among them, 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.

[0040] A current application mechanism is arranged on the workpiece forming component and is in close contact with the metal blank 18. The workpiece forming component can drive the current application mechanism to move synchronously to perform electrical heating treatment on 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. The first conductive head mechanism connecting plate 9 and the second conductive head mechanism connecting plate 15 are provided with a guide component, wherein the guide component 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 guiding structure is provided on the longitudinal slider 5. The above-mentioned guiding 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.

[0041] 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.

[0042] The conductive head mechanism 19 includes 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, wherein the conductive head mechanism 19 also includes an adapter portion 195 threadedly installed on the sliding rod 196, the adapter portion 195 is threadedly connected to the connecting portion 192, a cooling water baffle 193 is fixed in the connecting portion 192, the connecting portion 192 is threadedly connected to the end portion 191, an annular retaining ring 194 is fixed to the outer wall of the adapter portion 195 and the connecting portion 192, and the annular retaining ring 194 is composed of two identical parts, one end of which is clamped by two sets of bolts and nuts, and the other end is connected to the positive / negative poles of the pulse power supply.

[0043] Furthermore, when the position adjustment of the conductive head mechanism 19 is completed, the screwing depth of the tightening screw 199 can be adjusted so that the end 191 of the conductive head mechanism 19 can be in close contact with the metal blank 18 under the pressure of the compression spring 198. At this time, circulating cooling water can be introduced into the connecting portion 192. Under the action of the cooling water baffle 193, the circulation speed of the cooling water is increased to enhance the cooling effect of the conductive head mechanism 19. In order to further increase the conductivity of the contact area, the spherical end 191 is made of tungsten-copper alloy; between the end 191 and the blank 18, the spherical end 191 is made of tungsten-copper alloy. 8 is lubricated with high-temperature resistant copper-based grease, which can also increase the conductivity of the contact area; on the basis of the above measures, a wire is used to connect the pulse power supply and the conductive head mechanism 19; 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 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 spinnable range, reducing the temperature gradient of each part. At this time, the rotating wheel 12 moves according to the set trajectory to perform spinning plastic processing on the metal blank 18.

[0044] 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 tungsten-copper alloy to make the end of the conductive head mechanism, the use of compression springs to make the end in close contact with the metal blank, 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 accuracy is improved; on the other hand, the loss of the surface 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 of 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 rupture.

[0045] An electric-assisted spinning forming method comprises the following steps:

[0046] 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, the rotating wheel 12 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;

[0047] Step 2: Apply grease, and apply high temperature resistant copper-based grease on the front and back sides of the metal blank 18;

[0048] Step 3: Adjust the initial relative positions of the conductive head mechanism 19, the rotating wheel 12 and the metal blank 18, and move the rotating wheel frame 11 by controlling the machine tool slide to make the rotating wheel 12 in the rotating position; control the machine tool slide to move the tool bar 16 by 90 degrees, and adjust the transverse guide rail 6 and the longitudinal guide rail 4 as well as the longitudinal slide block 5 and the transverse slide block 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 slide block 5 and the transverse slide block 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;

[0049] Step 4: introducing circulating cooling water into the conductive head mechanism 19, and connecting the pulse power supply and the conductive head mechanism 19 with a wire;

[0050] Step 5: Rotate the core mold 3 and preheat the metal blank, start the machine tool spindle, and make the rotating core mold 3, the tail top 13 and the metal blank 18 rotate together at a speed v; start the pulse power supply; by moving the machine tool slide, 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;

[0051] 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 rotating wheel frame 11 and the 90-degree tool rod 16 are controlled to move synchronously according to the set trajectory to complete the electric-assisted spinning;

[0052] 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.

[0053] 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.

[0054] 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. An electrically assisted spinning forming device and method, characterized in that: include: A clamping assembly, arranged on the machine tool, for clamping a metal blank (18); A workpiece forming assembly, arranged on the machine tool, for performing spinning plastic processing on the metal blank (18); The current applying mechanism is arranged on the workpiece forming assembly and is in close contact with the metal blank (18). The workpiece forming assembly can drive the current applying mechanism to move synchronously so as to perform an electric heating treatment on the metal blank (18).

2. The electric-assisted spinning forming device and method according to claim 1, characterized in that: The clamping assembly comprises a core mold adapter plate (1) connected to a machine tool spindle bolt / nut, a core mold insulating pad (2) being fixed on the core mold adapter plate (1), a core mold (3) penetrating the core mold insulating pad (2) being installed on the core mold adapter plate (1), the core mold (3) and a tail top (13) jointly clamping the metal blank (18), the tail top (13) being screw-connected to a machine tool tailstock, and a tail top insulating pad (14) being fixed between the tail top (13) and the machine tool tailstock.

3. The electric-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) connected to the machine tool slide by screws; a supporting insulating pad (10) and an insulating sleeve (17) are respectively fixed between the machine tool slide and the rotating wheel frame (11) and the 90-degree tool rod (16); a rotating wheel (12) is rotatably mounted on the rotating wheel frame (11); the rotating wheel (12) is in close contact with the metal blank (18) and moves according to a set trajectory to form the metal blank (18).

4. The electric-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 guide components are arranged on the first conductive head mechanism connecting plate (9) and the second conductive head mechanism connecting plate (15).

5. The electric-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. The electric-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. An electrically 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 electric-assisted spinning forming device and method according to claim 7, characterized in that: The conductive head mechanism (19) further comprises a transition portion (195) threadedly mounted on the slide rod (196); the transition portion (195) is threadedly connected to the connecting portion (192); a cooling water baffle (193) is fixed inside the connecting portion (192); the connecting portion (192) is threadedly connected to the end portion (191); an annular retaining ring (194) is fixed to the outer wall of the transition portion (195) and the connecting portion (192); the annular retaining ring (194) is composed of two identical parts, one end of which is clamped by two sets of bolts and nuts, and the other end is connected to the positive / negative poles of the pulse power supply.

9. An electric-assisted spinning forming method, using the electric-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), the rotating wheel (12) 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), and move the rotating wheel frame (11) by controlling the machine tool slide to make the rotating wheel (12) in the starting position; control the machine tool slide to move the tool bar (16) by 90 degrees, and adjust the transverse guide rail (6) and the longitudinal guide rail (4) as well as the longitudinal slide block (5) and the transverse slide block (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 slide block (5) and the transverse slide block (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: introducing circulating cooling water into the conductive head mechanism (19), and connecting the pulse power supply and the conductive head mechanism (19) with a wire; Step 5: Rotate the core mold (3) and preheat the metal blank, start the machine tool spindle, and make the rotating core mold (3), the tail top (13) and the metal blank (18) rotate together at a speed v; start the pulse power supply; 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) by moving the machine tool slide, so that the overall temperature of the metal blank (18) reaches the rotatable range, and the temperature gradient existing in each part is reduced; Step 6: Spin forming: After preheating the metal blank (18), the conductive head mechanism (19) moves to the relative position determined in step 3; through numerical control programming, the rotating wheel frame (11) and the 90-degree tool rod (16) are controlled to move synchronously according to the set trajectory to complete the electric-assisted spinning forming; 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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