CN111408650B - Current-assisted composite spinning forming device and method for deep cup-shaped thin-wall part - Google Patents
Current-assisted composite spinning forming device and method for deep cup-shaped thin-wall part Download PDFInfo
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- CN111408650B CN111408650B CN202010211625.8A CN202010211625A CN111408650B CN 111408650 B CN111408650 B CN 111408650B CN 202010211625 A CN202010211625 A CN 202010211625A CN 111408650 B CN111408650 B CN 111408650B
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- 238000009987 spinning Methods 0.000 title claims abstract description 344
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000002131 composite material Substances 0.000 title claims abstract description 20
- 238000007493 shaping process Methods 0.000 claims abstract description 48
- 230000008569 process Effects 0.000 claims abstract description 15
- 238000009826 distribution Methods 0.000 claims description 5
- 229910000746 Structural steel Inorganic materials 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 18
- 230000009467 reduction Effects 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000007547 defect Effects 0.000 abstract description 3
- 238000005096 rolling process Methods 0.000 abstract description 3
- 238000010892 electric spark Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002679 ablation Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009966 trimming Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000002441 reversible effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/14—Spinning
- B21D22/16—Spinning over shaping mandrels or formers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/02—Making hollow objects characterised by the structure of the objects
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Abstract
The invention discloses a current-assisted composite spinning forming device and method for a deep cup-shaped thin-wall part, which comprises a spinning core die, a tail top and a plurality of spinning wheels which are uniformly distributed on the circumference of the spinning core die; each spinning wheel is arranged in a staggered manner in the axial direction and the radial direction of the spinning core mold; the spinning surface of each spinning wheel comprises a deep drawing spinning surface, a flowing spinning section and a shaping spinning surface; the staggered arrangement is that the deep drawing spinning surface, the flowing spinning section and the shaping spinning surface of each spinning wheel are uniformly staggered in the axial direction and the radial direction of the spinning core die. In the spinning process, due to the fact that the rotary wheels are different in shape and structure of the arc-shaped profile used for deep drawing spinning, in the period of each rotation of the spinning core mold, the rotary wheels exert pressure on different parts of the blank in a side-by-side mode, the pass rolling reduction is increased, the spinning passes are reduced, the production efficiency is improved, and the defects that materials are broken and cannot be used and the like due to the fact that the material processing process is discontinuous and the workpiece is hardened are reduced.
Description
Technical Field
The invention relates to the field of plastic processing forming of mechanical engineering, in particular to a current-assisted composite spinning forming device and method for a deep cup-shaped thin-wall part.
Background
The deep cup-shaped thin-wall part is a thin-wall complex component with a bottom and a larger major diameter. Because the length-diameter ratio is large, the part can be formed by adopting a spinning process, generally, a shallow cup-shaped part is obtained by adopting multi-pass deep-drawing spinning forming, and then the wall thickness is reduced by carrying out multi-pass flowing spinning forming to obtain the deep cup-shaped thin-wall part.
The following problems mainly exist:
1. the two spinning processes of drawing spinning and flowing spinning are independent and completely separated from each other, so that the processing flow and the operation time of a workpiece are overlong; after the deep drawing spinning operation, the tool needs to be replaced and adjusted again to perform the flowing spinning operation, so that the processing time is delayed, and the part precision is influenced to a certain extent.
2. During deep drawing and spinning forming, repeated multi-pass forming is carried out by adopting a single rotating wheel for multiple passes or adopting double (or multiple) rotating wheels with the same geometric parameters, and because the geometric parameters of each rotating wheel are the same, the pass reduction is limited, and the pass times have to be increased; this also leads to an increase in working time; more importantly, the production process of the workpiece is discontinuous due to the extension of the processing time of the workpiece and the time for replacing and adjusting the tool, so that the workpiece is hardened to cause material fracture.
3. In some cases, current-assisted spinning forming is adopted, but one electrode is applied to the surface of a workpiece, namely a blank, and the blank surface is ablated due to electric sparks generated by dynamic contact during rotation, so that the surface of a formed part is seriously damaged, and the product quality is influenced.
Disclosure of Invention
The invention provides a current-assisted composite spinning forming device and method for a deep cup-shaped thin-wall part. The problems that in the prior art, due to the fact that operation processes of drawing spinning and flow spinning (or shaping spinning) are discontinuous in a workpiece production process, materials are broken due to hardening of workpieces, tools need to be adjusted again when working procedures are replaced, the production period is long and the like are solved.
The invention is realized by the following technical scheme:
a current-assisted composite spinning forming device for deep cup-shaped thin-wall parts comprises a spinning core die 4, a tail top 6 and a plurality of spinning wheels 3 which are uniformly distributed on the circumference of the spinning core die 4; each spinning wheel 3 is arranged at equal intervals in the axial direction and the radial direction of the spinning core mould 4; the spinning surface of each spinning wheel 3 comprises a deep drawing spinning surface 1, a flowing spinning section and a shaping spinning surface 2; the staggered arrangement is that the deep drawing spinning surface 1, the flowing spinning section and the shaping spinning surface 2 of each spinning wheel 3 are uniformly staggered in the axial direction and the radial direction of the spinning core mould 4.
The number of the rotary wheels 3 is at least three, and the staggered distribution is represented as follows:
the section line of the deep drawing spinning surface 1 of each spinning wheel 3 is an arc line, and the arc radius of each deep drawing spinning surface 1 is gradually reduced in sequence;
the section shape of the shaping spinning surface 2 of each spinning wheel 3 is a straight line; according to the rotation sequence, the inclination angles of the shaping spinning surfaces 2 of the first two adjacent spinning rollers 3 relative to the axis of the spinning core mold 4 are the same or are sequentially reduced, and the inclination angles of the shaping spinning surfaces 2 of the third spinning roller 3 relative to the axis of the spinning core mold 4 are smaller than the inclination angles of the first two spinning rollers 3;
each flowing spinning section is of a conical structure, namely a tip fillet part at the straight line joint of the arc line of the drawing spinning surface 1 and the shaping spinning surface 2, and the tip fillets of each flowing spinning section are gradually staggered in sequence.
The same inclination angles of the first two adjacent rotary wheels 3 mean the same inclination angles in a range of 2-3 degrees, and the sequentially decreasing inclination angles mean the sequentially decreasing inclination angles in a range of 2-3 degrees; the inclination angle of the third rotary wheel 3 is 0.5-1 deg.
The current-assisted composite spinning forming device for the deep cup-shaped thin-wall part also comprises a counter-thrust plate 5 abutting against the edge of the blank 7; electrodes are respectively arranged on the counter plate 5 and the tail top 6, wherein the tail top 6 is provided with a positive electrode, and the counter plate 5 is provided with a negative electrode; during spinning, a pulse current flows from the central area of the blank 7 to the edge through the tail tip 6 and the counter plate 5 as a current to assist spinning.
When the number of the spinning rollers 3 is three, the spinning rollers are uniformly distributed on the circumference of the spinning core mould 4 in an angle of 120 degrees.
A current-assisted composite spinning forming method for a deep cup-shaped thin-wall part comprises the following steps:
the circular plate-shaped blank 7 is pressed against the spinning core mould 4 by the tail top 6;
applying a thrust force along the axial direction of the spinning core mold 4 to the counter-thrust plate 5, namely, towards the blank 7, so that the counter-thrust plate 5 is tightly pressed against the edge of the blank 7; applying a pulse current on the tail top 6 and the counter plate 5, wherein the pulse current flows to the edge from the central area of the blank 7 and is used as current for assisting spinning;
a deep drawing spinning surface 1 of a spinning wheel 3 is positioned at a working station; when the number of the spinning wheels 3 is three, the arc radius of each drawing spinning surface 1 and the inclination angle of each shaping spinning surface 2 are gradually reduced in sequence; correspondingly, the clearance between the tip fillet of the conical structure of the flow spinning section and the spinning core mold 4 is also gradually reduced;
the spinning core mold 4 rotates; according to the arrangement sequence of the circular arc radiuses of the spinning wheels from small to small, the deep-drawing spinning surface 1 gradually and sequentially performs deep-drawing spinning on the blank 7, and when the blank passes through the tip fillet of the flowing spinning section, the flowing spinning on the blank 7 is completed, so that the deep-drawing and thinning of the blank 7 are completed; then entering a shaping spinning surface 2, and gradually finishing and shaping the surface of the thinned blank 7; and (3) completing the processes of deep-drawing spinning, flow spinning and shaping spinning of the blank 7, further realizing that the spinning core mould 4 rotates for one circle, and completing the three processes of deep-drawing spinning, flow spinning and shaping spinning until the required wall thickness of the whole deep cup-shaped part is obtained.
The spinning wheel 3, which has the smallest gap between the tip fillet of the flow spinning section and the axial face of the spinning mandrel 4, determines the final wall thickness after forming the deep cup-shaped part.
The current-assisted composite spinning forming method of the deep cup-shaped thin-wall part further comprises the step of cutting off the allowance of the opening part of the deep cup-shaped part.
Compared with the prior art, the invention has the following advantages and effects:
(1) the invention skillfully integrates and compounds the functions of deep drawing spinning and flowing spinning (or shaping spinning) on a spinning wheel in a staggered arrangement mode, and saves the time of tool replacement, procedure switching and adjustment among multiple spinning processes of deep drawing spinning and flowing spinning (or shaping spinning). And effectively overcome the loaded down with trivial details process that all will recalibrate the frock when changing the frock every time.
(2) In the prior art, during deep drawing and spinning forming, a single spinning wheel is adopted for multiple passes, or double (or multiple) spinning wheels with the same geometric parameters are adopted for repeated multiple passes forming, because the geometric parameters of each spinning wheel are the same, the pass reduction is limited, and the pass times have to be increased; this also leads to an increase in working time; more importantly, the production process of the workpiece is discontinuous even due to the extension of the processing time of the workpiece and the time for replacing and adjusting the tool, so that the workpiece is hardened to cause material fracture.
The invention adopts the staggered distribution of the rotary wheels, namely the difference or difference of the cambered surface radiuses of the deep drawing spinning surfaces 1 of the rotary wheels, the difference or difference of the inclination angles of the shaping spinning surfaces 2 and the difference or difference of the tip fillet positions of the flow spinning sections which are in a conical structure. Therefore, due to the different shapes and structures of the arc-shaped profiles of the spinning rollers for drawing and spinning, the spinning rollers exert pressure on different parts of the blank in each cycle of rotation of the spinning core mold, so that the rolling reduction of the pass is increased, the spinning pass is reduced, the production efficiency is improved, and the defects that the material is cracked and cannot be used and the like due to the fact that the material processing process is discontinuous and the workpiece is finally hardened are overcome.
(3) The invention adopts staggered spinning, and each pass of spinning can complete partial deep-drawing spinning, flow spinning and shaping spinning, thereby not only having continuous operation process, effectively preventing material hardening, but also improving production efficiency to the utmost extent.
(4) By applying pulse current to the central area and the edge part of the blank by utilizing the tail top and the reverse thrust disc, the dynamic contact between the useful surface of the blank and an electrode can be avoided to generate electric spark ablation, so that the requirements on the smoothness and the precision of the surface of a part can be protected. And cutting off the ablated useless edge in the final trimming process to obtain the high-quality spinning part.
The plasticity of the material is further improved by adopting current-assisted forming.
The provision of the counter-thrust plate, in addition to the above-described object, can also improve the stability of the deep-drawing spinning forming to avoid unstable wrinkling of the material.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention; in which three spinning wheels are stacked for contrasting the principle of the staggered arrangement.
Fig. 2 is a schematic diagram of an actual layout structure of three spinning rollers according to the present invention.
FIG. 3 is a schematic view of a partial cross-sectional structure of the spinning wheel of the present invention.
Fig. 4 is a schematic diagram showing the outline structure of the three spinning wheels of the present invention when they are stacked together.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Examples
As described in fig. 1-4. The invention discloses a current-assisted composite spinning forming device for deep cup-shaped thin-wall parts, which comprises a spinning core die 4, a tail top 6 and a plurality of spinning wheels 3 which are uniformly distributed on the circumference of the spinning core die 4; each spinning wheel 3 is arranged at equal intervals in the axial direction and the radial direction of the spinning core mould 4; the spinning surface of each spinning wheel 3 comprises a deep drawing spinning surface 1, a flowing spinning section and a shaping spinning surface 2; the staggered arrangement is that the deep drawing spinning surface 1, the flowing spinning section and the shaping spinning surface 2 of each spinning wheel 3 are uniformly staggered in the axial direction and the radial direction of the spinning core mould 4.
Fig. 1 shows that in order to compare the relative positions of the three spinning wheels (the spinning wheel a, the spinning wheel B and the spinning wheel C in sequence) in the radial direction and the axial direction, the three spinning wheels are arranged at the same position in the circumferential direction. The circumferential positions of the actual three spinning wheels are uniformly arranged around the spinning core 4 as shown in fig. 2. The profile shape of each spinning wheel is shown in fig. 3, wherein the section I is mainly used for deep-drawing spinning, the section II is mainly used for flow spinning and/or shaping spinning, the A, B spinning wheel is mainly used for deep-drawing spinning and flow spinning in three spinning wheels from left to right A, B, C in fig. 1, and the C spinning wheel is mainly used for deep-drawing spinning and shaping spinning.
The number of the rotary wheels 3 is at least three, and the staggered distribution is represented as follows:
the section line of the deep drawing spinning surface 1 of each spinning wheel 3 is an arc line, and the arc radius of each deep drawing spinning surface 1 is gradually reduced in sequence;
the section shape of the shaping spinning surface 2 of each spinning wheel 3 is a straight line; according to the rotation sequence, the inclination angles of the shaping spinning surfaces 2 of the first two adjacent spinning rollers 3 relative to the axis of the spinning core mold 4 are the same or are sequentially reduced, and the inclination angles of the shaping spinning surfaces 2 of the third spinning roller 3 relative to the axis of the spinning core mold 4 are smaller than the inclination angles of the first two spinning rollers 3;
in fig. 3, the shaping spinning surface 2 of each spinning roller is designed with different inclination angles α according to its function, and the A and B spinning rollers are designed for flow spinning, α can be designed according to conventional parametersA＝α B3 deg. Because deep-drawing spinning and flowing spinning exist in each step of spinning, in order to avoid generating obvious spiral trace of the spinning wheel, the three spinning wheels 3 are designed to have the functions of deep-drawing spinning and shaping spinning, and alpha is designedC0.5 degrees to improve the shaping effect on the surface of the part. Of course, the angle may be varied flexibly according to the specific application requirements.
Each flowing spinning section is of a conical structure, namely a tip fillet at the straight line joint of the arc line of the drawing spinning surface 1 and the shaping spinning surface 2, and the tip fillets of each flowing spinning section are gradually staggered in sequence.
From the technical characteristics, the offset distribution of the invention is the difference or difference of the cambered surface radius of the drawing spinning surface 1 of the spinning wheel, the difference or difference of the inclined angle of the shaping spinning surface 2 and the difference or difference of the tip fillet position of the conical structure of the flowing spinning section. The difference skillfully integrates the functions of drawing spinning and flow spinning (or shaping spinning) on a spinning wheel in a staggered arrangement mode, and saves the time of tool replacement, procedure switching and adjustment among a plurality of spinning processes of drawing spinning and flow spinning (or shaping spinning).
In the prior art, during deep drawing and spinning forming, a single spinning wheel is adopted for multiple passes, or double (or multiple) spinning wheels with the same geometric parameters are adopted for repeated multiple passes forming, because the geometric parameters of each spinning wheel are the same, the pass reduction is limited, and the pass times have to be increased; this also leads to an increase in working time; more importantly, the production process of the workpiece is discontinuous even due to the extension of the processing time of the workpiece and the time for replacing and adjusting the tool, so that the workpiece is hardened to cause material fracture.
As mentioned above, according to the invention, due to the different shapes and structures of the arc-shaped profiles of the spinning wheels for deep drawing and spinning, in each cycle of the spinning core mould rotating for one circle, the spinning wheels exert pressure on different parts of the blank, so that the pass reduction is increased, the spinning passes are reduced, the production efficiency is improved, and the defects that the material is cracked and cannot be used due to the fact that the material processing process is discontinuous and the workpiece is finally hardened are reduced.
The same inclination angle of the first two adjacent spinning wheels 3 (the first spinning wheel A with the largest circular arc radius of the drawing spinning surface 1) means the same inclination angle in the range of 2-3 degrees, and the sequential reduction means the sequential reduction in the range of 2-3 degrees; the inclination angle of the third rotary wheel 3 (the circular arc radius of the drawing spinning surface 1 is minimum, namely the C rotary wheel) is 0.5-1 degrees. However, other angles are possible depending on the actual condition of the workpiece.
As described above, in order to increase the pass reduction in each pass of the drawing-spinning process, the drawing-spinning is performed simultaneously by using three spinning wheels, and the arc-shaped profiles of the three spinning wheels are designed into different arc radiuses R, see fig. 4.
In fig. 4, in order to make each spinning roller contribute to the rolling reduction of the drawing spinning, the radius R of the circular arc, i.e., R, is gradually reduced from front to back (i.e., from the a spinning roller to the C spinning roller)1>R2>R3And the circular arc profile of the drawing and spinning section of the next rotating wheel exceeds the circular arc profile of the drawing and spinning section of the previous rotating wheel forwards, and the surface of the local workpiece subjected to drawing and spinning of the previous rotating wheel is pressurized again, so that the effect of increasing pass reduction is achieved.
The invention relates to a current-assisted composite spinning forming device for deep cup-shaped thin-wall parts, which also comprises a counter-thrust plate 5 abutting against the edge of a blank 7; electrodes are respectively arranged on the counter plate 5 and the tail top 6, wherein the tail top 6 is provided with a positive electrode, and the counter plate 5 is provided with a negative electrode; during spinning, a pulse current flows from the central area of the blank 7 to the edge through the tail tip 6 and the counter plate 5 as a current to assist spinning. The dynamic contact between the useful surface of the blank and the electrode can be avoided to generate electric spark ablation, so that the requirements on the smoothness and the precision of the surface of the part can be protected, the final trimming process can cut the ablated edge, and the high-quality spinning part can be obtained. When the blank 7 is made of alloy structural steel material, the pulse current is 1100A-1400A during current-assisted spinning. The current required for other materials depends on the application.
The current-assisted forming can also improve the material plasticity, and particularly needs better material plasticity when the deep cup-shaped thin-wall part is spun and formed. In the current-assisted spinning forming, one of two electrodes is connected to the surface of a component in a conventional electrode connection mode, but the phenomenon that electric sparks are generated by dynamic contact and the surface of the component is ablated is difficult to overcome at present. For this purpose, the invention proposes the above-mentioned pulsed current flow from the central region of the blank 7 to the edge via the tail 6 and counter plate 5 as a current-assisted spinning method.
For this purpose, the invention proposes a method for applying an electric current to the thrust reverser 5 and the tailcap 6, the principle configuration of which is shown in fig. 1. The provision of the counter-thrust plate, in addition to the above-described object, can also improve the stability of the deep-drawing spinning forming to avoid unstable wrinkling of the material.
In the embodiment of the invention, three spinning rollers 3 are selected and uniformly distributed on the circumference of the spinning core mold 4 in an angle of 120 degrees. The number can be more than 2 according to actual needs.
The invention relates to a current-assisted composite spinning forming method for a deep cup-shaped thin-wall part, which can be realized by the following steps:
the method comprises the following steps: the circular plate-shaped blank 7 is pressed against the spinning core mould 4 by the tail top 6;
step two: applying a thrust force along the axial direction of the spinning core mold 4 to the counter-thrust plate 5, namely, towards the blank 7, so that the counter-thrust plate 5 is tightly pressed against the edge of the blank 7; applying a pulse current on the tail top 6 and the counter plate 5, wherein the pulse current flows to the edge from the central area of the blank 7 and is used as current for assisting spinning;
step three: a deep drawing spinning surface 1 of a spinning wheel 3 is positioned at a working station; when the number of the spinning wheels 3 is three, the arc radius of each drawing spinning surface 1 and the inclination angle of each shaping spinning surface 2 are gradually reduced in sequence; correspondingly, the clearance between the tip fillet of the conical structure of the flow spinning section and the spinning core mold 4 is also gradually reduced;
step four: the spinning core mold 4 rotates; according to the arrangement sequence of the circular arc radiuses of the spinning wheels from small to small, the deep-drawing spinning surface 1 gradually and sequentially performs deep-drawing spinning on the blank 7, and when the deep-drawing spinning reaches the tip of a flowing spinning section, the flowing spinning on the blank 7 is completed, so that the deep-drawing and thinning of the blank 7 are completed; then entering a shaping spinning surface 2, and gradually finishing and shaping the surface of the thinned blank 7; and (3) completing the processes of deep-drawing spinning, flow spinning and shaping spinning of the blank 7, further realizing that the spinning core mould 4 rotates for one circle, completing the three processes of deep-drawing spinning, flow spinning and shaping spinning until the required wall thickness of the whole deep cup-shaped part is obtained, and finally cutting off the redundant edge of the opening part of the deep cup-shaped part.
The spinning wheel 3, which has the smallest gap between the tip fillet of the flow spinning section and the axial face of the spinning mandrel 4, determines the final wall thickness of the deep cup-shaped part after forming.
As described above, the present invention can be preferably realized. Three spinning wheels are adopted in the process, the structural shapes can be analogized in sequence according to specific conditions and application requirements in practical application, and the number can be one, two, three, four or more.
The embodiments of the present invention are not limited to the above-described embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and they are included in the scope of the present invention.
Claims (7)
1. A current-assisted composite spinning forming device for deep cup-shaped thin-wall parts comprises a spinning core die (4), a tail top (6) and a plurality of spinning wheels (3) which are uniformly distributed on the circumference of the spinning core die (4); the method is characterized in that: each spinning wheel (3) is arranged in a staggered manner in the axial direction and the radial direction of the spinning core mold (4); the spinning surface of each spinning wheel (3) comprises a deep drawing spinning surface (1), a flowing spinning section and a shaping spinning surface (2); the staggered arrangement is that the deep drawing spinning surface (1), the flowing spinning section and the shaping spinning surface (2) of each spinning wheel (3) are uniformly distributed in staggered distance in the axial direction and the radial direction of the spinning core mold (4);
the current-assisted composite spinning forming device for the deep cup-shaped thin-wall part also comprises a counter-thrust plate (5) which is abutted against the edge of the blank (7); electrodes are respectively arranged on the counter plate (5) and the tail top (6), wherein the tail top (6) is provided with a positive electrode, and the counter plate (5) is provided with a negative electrode; in the spinning process, pulse current flows from the central area of the blank (7) to the edge through the tail top (6) and the counter-thrust plate (5) to be used as current for assisting spinning;
the number of the rotary wheels (3) is at least three, and the staggered distribution is represented as follows:
the section line of the drawing spinning surface (1) of each spinning wheel (3) is an arc line, and the arc radius of each drawing spinning surface (1) is gradually reduced in sequence;
the section shape of the shaping spinning surface (2) of each spinning wheel (3) is a straight line; according to the rotation sequence, the inclination angles of the shaping spinning surfaces (2) of the first two adjacent spinning rollers (3) relative to the axis of the spinning core mold (4) are the same or are sequentially reduced, and the inclination angles of the shaping spinning surfaces (2) of the third spinning roller (3) relative to the axis of the spinning core mold (4) are smaller than the inclination angles of the first two spinning rollers (3);
each flowing spinning section is of a conical structure, namely a tip fillet at the straight line joint of the arc line of the drawing spinning surface (1) and the shaping spinning surface (2), and the tip fillets of each flowing spinning section are gradually staggered in sequence.
2. The current-assisted composite spinning forming device for the deep-cup-shaped thin-wall part according to claim 1, characterized in that: the inclination angles of the first two adjacent rotary wheels (3) are the same, namely the inclination angles are the same in the range of 2-3 degrees, and the inclination angles are sequentially reduced, namely the inclination angles are sequentially reduced in the range of 2-3 degrees; the inclination angle of the third rotating wheel (3) is 0.5-1 degrees.
3. The current-assisted composite spinning forming device for the deep-cup-shaped thin-wall part according to claim 2, characterized in that: the blank (7) is made of alloy structural steel, and the pulse current is 1100-1400A during current-assisted spinning.
4. The current-assisted composite spinning forming device for the deep-cup-shaped thin-wall part according to claim 3, characterized in that: when the number of the spinning rollers (3) is three, the spinning rollers are uniformly distributed on the circumference of the spinning core mold (4) in an angle of 120 degrees.
5. A current-assisted composite spinning forming method for a deep cup-shaped thin-wall part, which is characterized by being realized by the device of any one of claims 1 to 4, and comprising the following steps:
the circular plate-shaped blank (7) is centered and tightly pressed on the spinning core mold (4) by a tail top (6);
applying a thrust force along the axial direction of the spinning core mold (4), namely the direction of the blank (7), to the counter-thrust plate (5) so that the counter-thrust plate (5) is tightly propped against the edge of the blank (7); applying a pulse current on the tail top (6) and the counter plate (5), wherein the pulse current flows to the edge from the central area of the blank (7) and is used as current for assisting spinning;
the deep drawing spinning surface (1) of the spinning wheel (3) is positioned at a working station; when the number of the spinning wheels (3) is three, the arc radius of each drawing spinning surface (1) and the inclination angle of each shaping spinning surface (2) are gradually reduced in sequence; correspondingly, the clearance between the tip fillet of the conical structure of the flow spinning section and the spinning core mould (4) is also gradually reduced;
the spinning core mold (4) rotates; according to the arrangement sequence of the circular arc radiuses of the spinning wheels from small to small, the drawing spinning surface (1) gradually draws and spins the blank (7), and when the drawing spinning is carried out to the tip round corner of the flowing spinning section, the flowing spinning of the blank (7) is completed, so that the drawing and the thinning of the blank (7) are completed; then, the blank enters a shaping spinning surface (2), and the surface of the thinned blank (7) is gradually subjected to finishing shaping; and (3) completing the processes of deep-drawing spinning, flow spinning and shaping spinning of the blank (7), further realizing one rotation of the spinning core mold (4), and completing the three processes of deep-drawing spinning, flow spinning and shaping spinning until the required wall thickness of the whole deep cup-shaped part is obtained.
6. The current-assisted composite spinning forming method for the deep-cup-shaped thin-wall part according to claim 5, characterized by comprising the following steps of: the spinning wheel (3) with the smallest gap between the tip fillet of the flow spinning section and the axial surface of the spinning core mould (4) determines the final wall thickness of the deep cup-shaped part after forming.
7. The current-assisted composite spinning forming method for the deep-cup-shaped thin-wall part according to claim 6, characterized by comprising the following steps of: and after the required wall thickness of the deep cup-shaped part is achieved, the residual edge of the opening part of the deep cup-shaped part is cut off.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010211625.8A CN111408650B (en) | 2020-03-24 | 2020-03-24 | Current-assisted composite spinning forming device and method for deep cup-shaped thin-wall part |
| JP2022557763A JP7465582B2 (en) | 2020-03-24 | 2020-10-16 | Apparatus and method for current-assisted composite spinning forming of deep cup-shaped thin-walled parts |
| PCT/CN2020/121361 WO2021189824A1 (en) | 2020-03-24 | 2020-10-16 | Deep-cup-shaped thin-wall part current auxiliary composite spinning forming device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010211625.8A CN111408650B (en) | 2020-03-24 | 2020-03-24 | Current-assisted composite spinning forming device and method for deep cup-shaped thin-wall part |
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| CN111408650A CN111408650A (en) | 2020-07-14 |
| CN111408650B true CN111408650B (en) | 2021-05-14 |
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| CN202010211625.8A Active CN111408650B (en) | 2020-03-24 | 2020-03-24 | Current-assisted composite spinning forming device and method for deep cup-shaped thin-wall part |
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| CN111408650B (en) * | 2020-03-24 | 2021-05-14 | 华南理工大学 | Current-assisted composite spinning forming device and method for deep cup-shaped thin-wall part |
| CN112916706B (en) * | 2021-01-26 | 2023-07-21 | 西安航天动力机械有限公司 | General rotation processing method for thin-wall complex workpiece |
| CN115369233A (en) * | 2022-04-07 | 2022-11-22 | 西北工业大学 | Method for eliminating flow spinning residual stress of cylindrical part with inner ribs |
| CN114769454B (en) * | 2022-04-20 | 2023-05-12 | 华南理工大学 | Flexible gear and strengthening and toughening cold processing method thereof |
| CN114769405B (en) * | 2022-04-27 | 2023-07-21 | 西安航天动力机械有限公司 | Integral spinning processing method for variable-section cylindrical workpiece with spherical end socket |
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| DE2758254A1 (en) * | 1977-12-27 | 1979-07-05 | Krupp Gmbh | DEVICE FOR STRIPPING AND STRIPPING ONE-PIECE CONTAINER CUPS |
| JPS5992123A (en) * | 1982-11-15 | 1984-05-28 | Toshiba Mach Co Ltd | Method and device for rotary ironing |
| JP4568962B2 (en) | 1999-06-30 | 2010-10-27 | アイシン・エィ・ダブリュ株式会社 | Apparatus for forming clutch drum and internal gear member |
| JP3997684B2 (en) | 2000-03-29 | 2007-10-24 | アイシン・エィ・ダブリュ株式会社 | Manufacturing method of internal tooth member |
| JP2005040814A (en) | 2003-07-25 | 2005-02-17 | Toyoda Mach Works Ltd | Working device for workpiece and working method |
| CN103264263B (en) * | 2013-05-30 | 2015-04-08 | 中国航空工业集团公司北京航空制造工程研究所 | Process method for spinning tubular part in staggered mode |
| RS62105B1 (en) | 2014-11-28 | 2021-08-31 | Repkon Machine And Tool Ind And Trade Inc | Device and method for pressure rolling workpieces |
| CN104550393B (en) * | 2014-12-03 | 2016-08-24 | 华南理工大学 | A kind of high-fineness ratio band concave bottom thin-wall tube-shaped element accurate forming method |
| RU2615959C1 (en) * | 2015-11-19 | 2017-04-11 | Открытое акционерное общество "Научно-производственное объединение "СПЛАВ" | Thin-walled axisymmetric steel shell manufacturing method |
| CN106903205B (en) * | 2017-04-21 | 2018-12-21 | 首都航天机械公司 | A kind of flanged (FLGD) stainless steel seamless pipe spin forming method in end |
| CN108127014B (en) * | 2017-12-06 | 2019-05-31 | 西安航天动力机械有限公司 | The wrong method away from reversed spinning of a kind of pair of wheel |
| JP6998251B2 (en) | 2018-03-28 | 2022-01-18 | Ｋｙｂ株式会社 | Roller for rotary plastic working and rotary plastic working equipment equipped with it |
| CN109365611B (en) * | 2018-10-10 | 2020-12-29 | 华南理工大学 | Electric pulse auxiliary spinning forming machine tool |
| CN109772986B (en) * | 2018-12-17 | 2020-04-28 | 西安航天动力机械有限公司 | Method for adjusting spinning offset of three-spinning wheel |
| CN109772988B (en) * | 2018-12-25 | 2020-06-16 | 西安航天动力机械有限公司 | Method for adjusting offset of spinning wheel for offset spinning of cylindrical part |
| CN111408650B (en) * | 2020-03-24 | 2021-05-14 | 华南理工大学 | Current-assisted composite spinning forming device and method for deep cup-shaped thin-wall part |
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| CN111408650A (en) | 2020-07-14 |
| WO2021189824A1 (en) | 2021-09-30 |
| JP2023518962A (en) | 2023-05-09 |
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