CN114082825A - Reverse flow spinning forming device for cylindrical part with grid ribs and control method - Google Patents
Reverse flow spinning forming device for cylindrical part with grid ribs and control method Download PDFInfo
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- CN114082825A CN114082825A CN202111264921.5A CN202111264921A CN114082825A CN 114082825 A CN114082825 A CN 114082825A CN 202111264921 A CN202111264921 A CN 202111264921A CN 114082825 A CN114082825 A CN 114082825A
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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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Abstract
The invention provides a reverse flow spinning forming device and a control method for a cylindrical part with grid ribs, wherein the reverse flow spinning forming device comprises the following steps: the device comprises a front cover, a core module, a core rod, a rotary wheel and a fixed control ring; a plurality of core modules are arranged on the periphery of the core rod; one end of the core rod and the core module is provided with a front cover, and the other end of the core rod and the core module is provided with a fixed control ring; a barrel blank is sleeved on one side of the core module, which is back to the core rod, and a rotary wheel is arranged on the outer side of the barrel blank; the rotary wheel is spirally pressed on the barrel blank and moves from the end where the front cover is located to the end where the fixed control ring is located along the axial direction; the fixed control ring pushes the core module to move from the end where the fixed control ring is located to the end where the front cover is located along the axial direction; the front cover is back to one side of the fixed control ring and is provided with a tail top, and the tail top applies tail top force towards the direction of the fixed control ring to the front cover. The invention ensures that the formed rib body is not influenced by axial tension any more by a reverse-rotation flowing inner rib filling mode, and gets rid of the cracking risk caused by overlarge forward-rotation axial tension.
Description
Technical Field
The invention relates to the technical field of metal plastic processing, in particular to a reverse flow spinning forming device and a control method for a cylindrical part with grid ribs.
Background
The thin-wall cylindrical part with the inner ribs has the advantages of high rigidity, high strength, low structural weight coefficient and the like, so that the thin-wall cylindrical part has wide application in the fields of aviation, aerospace and the like. The flow spinning is an advantageous technology for forming the parts, and a large amount of research is carried out on the forming rule of the inner ribs by the flow spinning by scholars, and the research shows that the main factor influencing the rib forming is the axial flow quantity. Along with the increase of axial flow, the height and the shape of the rib can be influenced by different rules, and the filling fullness of the inner rib is finally influenced.
Patent document CN109940079B discloses a method and device for improving the filling height of internal ribs in spin forming of a cylindrical member with internal ribs, wherein a fixing ring and an axial restraining ring are added on the existing spin core die of the cylindrical member with internal ribs, and the fixing ring is fixedly connected with the spin core die by threads; one end of the supporting rod is fixedly connected with the axial threaded through hole in the axial restraining ring through threads, the other end of the supporting rod penetrates through the axial through hole in the fixing ring and can move along the axial direction of the core die together with the axial restraining ring in the spinning forming process, and in the spinning forming process of the ribbed cylindrical part with the inner rib, the free end of the workpiece extends and drives the axial restraining ring and the supporting rod to move towards the fixing ring, so that the compression spring on the supporting rod is compressed, and further, axial force in the opposite direction is provided for the free end of the workpiece. The axial force generated by the spinning forming is large, the axial constraint force provided by the spring is limited compared with the reaction force of the spinning forming, and meanwhile, when the cylinder blank is directly large, higher requirements are provided for a spring device, and the forming quality is not easy to control; the filling scheme adopts forward spinning, and for parts with grid ribs, the formed area can be applied by axial tensile stress due to the axial acting force of the spinning wheel, so that the formed rib body part is easy to crack due to excessive tensile stress.
Patent document CN102266888A provides a ball spin forming tooling device and a reverse ball spin forming method thereof, the ball spin forming tooling device includes a spinning head, a core mold and a limit ring, the spinning head includes a thread support tube, an outer support ring, a conical mold ring, and balls, the thread support tube and the conical mold ring are installed in the outer support ring, one end of the thread support tube is located in the conical mold ring, the balls are located in the conical mold ring, a circle is uniformly distributed along the conical surface of the conical mold ring, and are in contact with the thread support tube, the core mold includes a core shaft and a discharge ring, the discharge ring is sleeved on the core shaft, and the limit ring is sleeved on one end of the core shaft. The reverse ball spinning forming method is completed through three steps of a preparation stage, a spinning stage and an unloading stage. Firstly, the device uses ball spinning, when the device is applied to spinning of a cylindrical part with large radial dimension, the device needs extremely large balls, and high requirements are provided for equipment, so that the application of the device is limited; secondly the device is only applicable to the packing of vertical muscle, is not applicable to the part that the interior muscle is the net muscle, because the shaping district can produce reverse motion along with the axial feed of spinning wheel during reverse spinning, then the shaping muscle can be along with material along axial displacement, and the device can lead to the shaping muscle to produce the destruction when spinning.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a reverse flow spinning forming device and a control method for a cylindrical part with grid ribs.
The invention provides a reverse flow spinning forming device for a cylindrical part with grid ribs, which comprises: the device comprises a front cover, a core module, a core rod, a rotary wheel and a fixed control ring;
a plurality of core modules are arranged on the periphery of the core rod;
the front cover is arranged at one end of the core rod and one end of the core module, and the fixed control ring is arranged at the other end of the core rod and the other end of the core module;
a barrel blank is sleeved on one side, back to the core rod, of the core module, and the rotary wheel is arranged on the outer side of the barrel blank;
the rotary wheel is spirally pressed on the barrel blank and moves from the end of the front cover to the end of the fixed control ring along the axial direction;
the fixed control ring pushes the core module to move from the end where the fixed control ring is located to the end where the front cover is located along the axial direction;
the front cover is back to one side of the fixed control ring, and a tail top is arranged on one side of the front cover, and exerts tail top force towards the direction of the fixed control ring on the front cover.
Preferably, a key groove is formed at one end of the fixed control ring connected with the core module;
and one end of the fixed control ring, which is back to the core module, extends out of the cylindrical pipe.
Preferably, one end of the core module, which is connected with the fixed control ring, is provided with a limiting groove, and the plurality of core modules form an annular groove in a surrounding manner through the limiting groove;
the annular groove is connected with the key groove in a clamping manner;
and one side of the core module, which is back to the core rod, is provided with a rib groove.
Preferably, the fixed control ring comprises a first half ring and a second half ring, and the first half ring and the second half ring surround to form the fixed control ring;
the outer side of the first semi-ring is provided with a first step surface, the outer side of the second semi-ring is provided with a second step surface, and the first step surface is in threaded connection with the second step surface.
Preferably, the core module is sleeved with a joint towards the outer side of one end of the fixed control ring;
a cavity is arranged in the joint.
Preferably, a through hole is formed in the end face of one side, back to the front cover, of the joint;
the fixed control ring is provided with one end of the key groove and is arranged in the cavity, and the cylindrical pipe penetrates through the through hole.
Preferably, the inner wall of the cavity is provided with a slide rail surface, and the fixed control ring and the core module move along the axial direction of the mandrel through the slide rail surface;
the cavity is provided with a positioning step at one end of the through hole, and the fixed control ring is positioned by the positioning step.
Preferably, the rotary wheel is provided with a plurality of rotary wheels, and the plurality of rotary wheels are circumferentially distributed on the periphery of the barrel blank at equal intervals;
the cylinder blank faces one side of the rib groove and forms an inner rib through the rotary wheel.
Preferably, the control method of the cylindrical member with grid ribs reverse flow spinning forming device comprises the following steps:
step S1, the spinning wheel spins the outer side of the tube blank and moves from the end of the front cover to the end of the fixed control ring along the axial direction;
the cylinder blank forms the inner rib through the rotary wheel and the rib groove, and the inner rib exerts a reverse jacking force on the rib groove;
step S2, the fixed control ring is connected with a motor and is controlled by the motor to move from the end of the fixed control ring to the end of the front cover along the axial direction, and the core module moves along with the fixed control ring;
and meanwhile, the tail top applies the tail top force to the front cover, and when the reverse top force is greater than the tail top force, the core module and the fixed control ring move from the end where the fixed control ring is located to the end where the front cover is located along the axial direction under the limitation of the cavity.
Preferably, when the spinning wheel is positioned at the non-inner rib area for spinning, the moving speed of the fixed control ring is v, and the following conditions are satisfied:
wherein: v. of1The feeding speed of the spinning wheel is delta, the pressing amount is delta, and t is the material thickness;
when the spinning wheel is positioned in the inner rib area for spinning, the fixed control ring does not move along the axial direction;
preferably, the side of the joint, which faces away from the front cover, is mounted on a spindle of a machine tool in a threaded manner.
Preferably, the spinning wheel is provided with 3 spinning wheels.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention realizes the reverse rotation forming process of the grid rib, promotes the metal material to flow into the rib groove by properly restricting the axial flow of the metal blank, and increases the height of the rib in the grid;
2. according to the invention, through a reverse-rotation flowing inner rib filling mode, the formed rib body is not subjected to the action of axial tension, and the cracking risk caused by overlarge forward-rotation axial tension is avoided;
3. the invention provides axial constraint force through the fixing device, and the spinning wheel implements point contact forming, thereby being conveniently applied to forming large-sized axisymmetric parts with inner ribs.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic view of a core module and barrel blank assembly;
FIG. 2 is an axial cross-sectional view of a reverse flow spinning forming device for a cylindrical member with grid ribs;
FIG. 3 is a core module detail view;
FIG. 4 is a detail view of the stationary control ring;
FIG. 5 is an axial cross-sectional view of the stationary control ring;
shown in the figure:
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
Example 1
As shown in fig. 1, a reverse flow spinning forming device for a cylindrical member with a grid rib comprises: the device comprises a front cover 1, a core module 2, a core rod 4, a rotary wheel 5 and a fixed control ring 7; 4 week side installations of plug a plurality of core module 2, the protecgulum 1 is installed to plug 4 and 2 one end installations of core module, fixed control ring 7 is installed to plug 4 and the 2 other end installations of core module, 4 one side suit barrel blank 3 of plug are dorsad to core module 2, spinning wheel 5 is settled to the barrel blank 3 outside, spinning wheel 5 moves from the place end of protecgulum 1 to the place end of fixed control ring 7 along the axial on barrel blank 3, fixed control ring 7 promotes core module 2 and moves from the place end of fixed control ring 7 to the place end of protecgulum 1 along the axial, protecgulum 1 sets up the tail top to fixed control ring 7 one side dorsad, the tail top exerts the tail top force towards fixed control ring 7 direction to protecgulum 1. Spinning wheel 5 is provided with a plurality ofly, and a plurality of spinning wheels 5 circumference equidistance distribute in barrel blank 3 week side, and barrel blank 3 forms the interior muscle through spinning wheel 5 towards muscle groove one side.
As shown in fig. 2 and 3, a key groove is formed at one end of the fixed control ring 7 connected with the core module 2, and a cylindrical pipe extends from one end of the fixed control ring 7 opposite to the core module 2. The core module 2 is connected 7 one ends of fixed control ring and is set up the spacing groove, and a plurality of core modules 2 surround through the spacing groove and form the annular groove, and the keyway is connected in the annular groove block, and core module 2 sets up the muscle groove in 4 one side of the plug dorsad. A through hole is formed in the end face, back to the front cover 1, of the joint 6, one end, provided with a key groove, of the fixed control ring 7 is installed in the cavity, the cylindrical pipe penetrates through the through hole, and a sliding rail face and a positioning step are arranged in the cavity.
As shown in fig. 4, the fixed control ring 7 includes a first half ring and a second half ring, the first half ring and the second half ring surround to form the fixed control ring 7, a first step surface is disposed on an outer side of the first half ring, a second step surface is disposed on an outer side of the second half ring, and the first step surface is in threaded connection with the second step surface. The core module 2 is sleeved with a joint 6 towards the outer side of one end of the fixed control ring 7, and a cavity is arranged inside the joint 6.
The embodiment also provides a control method of the reverse flow spinning forming device for the cylindrical part with the grid ribs, which comprises the following steps: step S1, spinning wheel 5 spins the outer side of cylinder blank 3 and moves from the end of front cover 1 to the end of fixed control ring 7 along the axial direction; the cylinder blank 3 forms an inner rib through the rotary wheel 5 and the rib groove, and the inner rib exerts a reverse jacking force on the rib groove; step S2, the fixed control ring 7 is connected with a motor and controlled by the motor to move from the end of the fixed control ring 7 to the end of the front cover 1 along the axial direction, and the core module 2 moves along with the fixed control ring 7; meanwhile, the tail top exerts tail top force on the front cover 1, and when the reverse top force is larger than the tail top force, the core module 2 and the fixed control ring 7 move from the end where the fixed control ring 7 is located to the end where the front cover 1 is located in the axial direction together under the limitation of the cavity.
When spinning wheel 5 is located the regional spinning of interior muscle, fixed control ring 7 is not mobilizable along the axial, and when spinning wheel 5 is located the regional spinning of non-interior muscle, fixed control ring 7 translation rate is v to satisfy:
wherein: v. of1The feeding speed of the spinning wheel 5 is shown, delta is the pressing amount, and t is the material thickness;
the inner rib region refers to a region where the blank 3 is in contact with the rib groove and the inner rib is finally formed, and the non-inner rib region refers to a region where the blank 3 is not in contact with the rib groove.
Example 2
Example 2 is a preferred example of example 1.
As shown in fig. 1 to 4, the present embodiment includes: the device comprises a front cover 1, a core module 2, a barrel blank 3, a core rod 4, a spinning wheel 5, a joint 6 and a fixed control ring 7; a cavity is arranged in the joint 6, the tail part of the joint 6 is connected with a machine tool spindle through a bolt, and a sliding rail surface and a positioning step are arranged in the joint 6; the core module 2 surrounds the core rod 4, the tail part of the core module 2 is provided with a limiting groove, the fixed control ring 7 is provided with a key groove and is connected with the core module 2 through the key groove, and the head part of the fixed control ring 7 is arranged in a cavity of the joint 6. The limiting grooves of the core modules 2 surround to form an annular groove and are matched with the key grooves of the fixed control ring 7.
The fixed control ring 7 is divided into two halves and comprises a first half ring and a second half ring, the first half ring is provided with a first step surface, the second half ring is provided with a second step surface, and the first step surface is in threaded connection with the second step surface. The tail part of the fixed control ring 7 extends to form a cylindrical pipe, a through hole with the diameter matched with the diameter is formed in the joint 6, and the cylindrical pipe extends out of the through hole.
To better explain the device, the working principle of the device is explained by specific application scenarios as follows:
when the flow spinning of the barrel blank 3 is carried out, the core module 2, the core rod 4 and the front cover 4 are assembled and fixed; the two halves of the fixed control ring 7 are separately buckled at the tail part of the core module 2, so that the annular groove is clamped with the key groove, and the first half ring and the second half ring of the fixed control ring 7 are connected and fastened through bolts; the joint 6 is connected with a machine tool, and the assembled assembly body is placed in the inner cavity of the joint 6. After the spinning is finished, the tail top is loosened, the core rod 4 is taken out, the mold is separated in a split manner, and then the demolding can be finished.
The movement control mode of the core module 2 and the fixed control ring 7 adopts two modes:
controlling tail jacking force: the front cover 1 is provided with tail jacking force by a tail jacking, reverse jacking force is provided by formed inner ribs and rib grooves of the core module 2 in reverse spinning, and when the reverse jacking force is larger than the tail jacking force, the core module 2 and the fixed control ring 7 move axially together under the limitation of a cavity of the joint 6, so that space is provided for axial flow of blanks. The tail jacking force is smaller than the reverse jacking force generated by the formed inner rib and the rib groove of the core module 2 and is larger than the axial reaction force of the forming area of the inner rib;
position control: the tail part of the fixed control ring 7 is connected with a motor, and the core module 2 moves along the axial direction together with the fixed control ring 7 under the limit of the cavity of the joint 6 by controlling the axial movement mode of the motor. When the spinning wheel is positioned in a non-inner rib area for flow spinning, the motor controls the fixed control ring 7 to move along the axial direction, the moving speed is v, and the calculation formula is as follows:
wherein: v. of1The feeding speed of the spinning wheel is shown, delta is the pressing amount, and t is the material thickness.
When the rotary wheel is positioned at the inner rib and the rib groove, the motor controls the fixed control ring 7 to have no movement along the axial direction.
The embodiment result shows that the embodiment realizes the reverse rotation forming process of the grid rib, the formed inner rib cannot be damaged in the reverse flow spinning process by controlling the axial movement of the core module 2, the formed rib body is not influenced by the axial force by the reverse flow inner rib filling mode, the cracking influence of the axial tensile stress on the spinning is avoided, meanwhile, the axial constraint force is provided by the fixing device, and the spinning wheel 5 performs point contact forming, so that the reverse rotation forming process is conveniently applied to the forming of large axisymmetric parts with the inner rib, and has important significance in the process design of integral manufacturing of ribbed cylindrical parts.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. The utility model provides a take grid muscle cylinder shape spare countercurrent flow spinning forming device which characterized in that includes: the device comprises a front cover (1), a core module (2), a core rod (4), a rotary wheel (5) and a fixed control ring (7);
a plurality of core modules (2) are arranged on the periphery of the core rod (4);
one ends of the core rod (4) and the core module (2) are provided with the front cover (1), and the other ends of the core rod (4) and the core module (2) are provided with the fixed control ring (7);
a barrel blank (3) is sleeved on one side, back to the core rod (4), of the core module (2), and the rotary wheel (5) is arranged on the outer side of the barrel blank (3);
the spinning wheel (5) is spun on the barrel blank (3) and moves from the end where the front cover (1) is located to the end where the fixed control ring (7) is located in the axial direction;
the fixed control ring (7) pushes the core module (2) to move from the end of the fixed control ring (7) to the end of the front cover (1) along the axial direction;
the front cover (1) is back to one side of the fixed control ring (7) and is provided with a tail top, and the tail top applies tail top force towards the direction of the fixed control ring (7) to the front cover (1).
2. The reverse flow spinning forming device of a cylindrical member with a grid rib according to claim 1, wherein: one end of the fixed control ring (7) connected with the core module (2) is provided with a key groove;
and a cylindrical pipe extends from one end of the fixed control ring (7) back to the core module (2).
3. The reverse flow spinning forming device of a cylindrical member with a grid rib according to claim 2, wherein: one end of the core module (2) connected with the fixed control ring (7) is provided with a limiting groove, and the plurality of core modules (2) form an annular groove in a surrounding way through the limiting groove;
the annular groove is connected with the key groove in a clamping manner;
and one side of the core module (2) back to the core rod (4) is provided with a rib groove.
4. The reverse flow spinning forming device of a cylindrical member with a grid rib according to claim 2, wherein: the fixed control ring (7) comprises a first half ring and a second half ring, and the first half ring and the second half ring surround to form the fixed control ring (7);
the outer side of the first semi-ring is provided with a first step surface, the outer side of the second semi-ring is provided with a second step surface, and the first step surface is in threaded connection with the second step surface.
5. The reverse flow spinning forming device of a cylindrical member with a grid rib according to claim 3, wherein: the core module (2) is sleeved with a joint (6) towards the outer side of one end of the fixed control ring (7);
a cavity is arranged in the joint (6).
6. The reverse flow spinning forming device of a cylindrical member with grid ribs of claim 5, wherein: a through hole is formed in the end face of one side, back to the front cover (1), of the joint (6);
the fixed control ring (7) is provided with one end of the key groove and is arranged in the cavity, and the cylindrical pipe penetrates through the through hole.
7. The reverse flow spinning forming device of a cylindrical member with grid ribs as claimed in claim 6, wherein: the inner wall of the cavity is provided with a slide rail surface, and the fixed control ring (7) and the core module (2) move along the axial direction of the core rod (4) through the slide rail surface;
one end of the cavity, which is provided with the through hole, is provided with a positioning step, and the fixed control ring (7) is positioned through the positioning step.
8. The reverse flow spinning forming device of a cylindrical member with a grid rib according to claim 1, wherein: the rotary wheels (5) are arranged in a plurality, and the rotary wheels (5) are circumferentially distributed on the periphery of the barrel blank (3) at equal intervals;
the barrel blank (3) faces one side of the rib groove and forms an inner rib through the rotary wheel (5).
9. A method for controlling a reverse flow spinning forming apparatus for a cylindrical member with a grid rib according to claim 7, comprising the steps of:
step S1, the spinning wheel (5) spins the outer side of the barrel blank (3) and moves from the end where the front cover (1) is located to the end where the fixed control ring (7) is located along the axial direction;
the barrel blank (3) forms the inner rib through the rotary wheel (5) and the rib groove, and the inner rib exerts a reverse jacking force on the rib groove;
step S2, the fixed control ring (7) is connected with a motor and is controlled by the motor to move from the end of the fixed control ring (7) to the end of the front cover (1) along the axial direction, and the core module (2) moves along with the fixed control ring (7);
meanwhile, the tail ejection exerts the tail ejection force on the front cover (1), and when the counter ejection force is larger than the tail ejection force, the core module (2) and the fixed control ring (7) move from the end where the fixed control ring (7) is located to the end where the front cover (1) is located in the axial direction together under the limitation of the cavity.
10. The control method according to claim 9, characterized in that: when the spinning wheel (5) is positioned in the region which is not the inner rib for spinning, the moving speed of the fixed control ring (7) is v, and the following conditions are met:
wherein: v. of1The feeding speed of the spinning wheel (5) is delta, the pressing amount is delta, and t is the material thickness;
when the spinning wheel (5) is positioned in the inner rib area for spinning, the fixed control ring (7) does not move along the axial direction;
in step S2, the tail end force is greater than an axial reaction force of the inner bead molding region.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111264921.5A CN114082825B (en) | 2021-10-28 | 2021-10-28 | Reverse flow spinning forming device for cylindrical part with grid ribs and control method |
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| CN202111264921.5A CN114082825B (en) | 2021-10-28 | 2021-10-28 | Reverse flow spinning forming device for cylindrical part with grid ribs and control method |
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| CN114082825A true CN114082825A (en) | 2022-02-25 |
| CN114082825B CN114082825B (en) | 2022-12-30 |
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2021
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