CN114406080B - Extrusion spin forming method and forming tool for thin-wall member with inner rib - Google Patents
Extrusion spin forming method and forming tool for thin-wall member with inner rib Download PDFInfo
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- CN114406080B CN114406080B CN202210081304.XA CN202210081304A CN114406080B CN 114406080 B CN114406080 B CN 114406080B CN 202210081304 A CN202210081304 A CN 202210081304A CN 114406080 B CN114406080 B CN 114406080B
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000001125 extrusion Methods 0.000 title claims abstract description 28
- 238000009987 spinning Methods 0.000 claims abstract description 128
- 238000012937 correction Methods 0.000 claims abstract description 19
- 238000010035 extrusion spinning Methods 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 5
- 230000002035 prolonged effect Effects 0.000 claims description 5
- 230000000452 restraining effect Effects 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000013016 damping Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 230000002457 bidirectional effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 235000015842 Hesperis Nutrition 0.000 description 3
- 235000012633 Iberis amara Nutrition 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007493 shaping process Methods 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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- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention relates to an extrusion and rotation forming method and a forming tool for a thin-wall member with an inner rib, comprising the following steps: sleeving a blank to be formed on a spinning die with a groove, and compacting a first end of the blank to be formed with the spinning die; compressing a second end of the blank to be formed using an axial confinement ring to adjust an axial pressure of the blank to be formed during forming; driving the blank to be formed to rotate, extruding and forming the blank to be formed in the area with the groove, and spinning and forming the blank to be formed in the area without the groove; and measuring the wall thickness of the formed thin-wall member with the inner ribs at the inner ribs, and performing local shape correction on the area which is not fully filled. The extrusion spinning forming method of the thin-wall component with the inner ribs aims at solving the problem that the existing spinning technology cannot meet the requirement of forming of the component with the large ribs and the high wall thickness ratio.
Description
Technical Field
The invention relates to the technical field of metal plastic forming, in particular to an extrusion and rotation forming method and a forming tool for a thin-wall member with an inner rib.
Background
With the rapid development of high-technology industries such as aerospace and weapon systems, advanced spacecraft, rockets, satellites and missiles are in urgent need of adopting large-scale complex integral thin-wall shells with remarkable structural benefit in large quantity so as to lighten the mass and improve the integral performance. In order to lighten the quality of an aircraft, improve the reliability and increase the effective load, large thin-wall aluminum alloy cylindrical shells with reinforcing ribs are widely used on rockets and missiles. At present, a thin-wall cylinder body with grid ribs is processed by a process of milling a wallboard, bending and welding generally at home, and the processing process of the thin-wall cylinder body involves three main procedures of high-speed precise milling, high-precision bending forming and longitudinal seam welding, and has the problems of uneven weld performance, performance loss, long processing period, low material utilization rate and the like.
The spinning process is an integral plastic forming technology capable of forming a large-size thin-wall rotary body component with high precision and high performance, and has the advantages of high material utilization rate, low processing cost, capability of improving material performance and the like. The spinning technology can be applied to the forming of the thin-wall cylinder body with the grid rib, and the current domestic problem groups adopt the spinning forming technology of split core die design to manufacture the thin-wall cylinder body component with the inner rib structure. However, the conventional spinning process for forming the grid rib thin-wall cylinder has limitations, wherein the defects of rib part filling part fracture, web part bulge and the like are extremely easy to occur in multi-pass spinning of the grid rib component. Therefore, the thin-wall member of the spinning forming grid rib can be formed in one pass, the rib high wall thickness ratio of one-pass spinning forming piece is difficult to reach more than 1.5, and the increasing light weight requirement is difficult to meet.
In the conventional thin-wall cylinder spinning forming process, a blank is mounted on a core die and rotates along with the core die, and radial and axial pressure is applied to the blank by a spinning wheel, so that the radial wall thickness of the blank is reduced, the axial height of the blank is prolonged, and a thin-wall component with a large height is formed.
In the process of forming the thin wall with the inner rib, metal in the deformation zone mainly flows along the radial direction and the axial direction, wherein the metal radially flows to fill the grid rib part, and the axial flow increases the length of the workpiece. Because the radial flow is only in a small part of the area where the core mould is provided with the groove, the metal flow is still mainly axial flow, and the radial flow of the metal in the deformation area is insufficient, so that the defects of underfilling and the like of the rib part are caused. For the spinning forming of the grid ribs, a multi-pass spinning forming method cannot be adopted, otherwise, the formed inner ribs axially move, and the defects of inner rib breakage and the like are easy to occur.
Therefore, the inventor provides an extrusion and rotation forming method and a forming tool for the thin-wall member with the inner rib.
Disclosure of Invention
(1) Technical problem to be solved
The embodiment of the invention provides an extrusion-spinning forming method and a forming tool for a thin-wall member with an inner rib, which solve the technical problem that the existing spinning process cannot meet the requirement of forming a member with a large rib and a high wall thickness ratio.
(2) Technical proposal
The invention provides an extrusion and rotation forming method of a thin-wall member with an inner rib, which comprises the following steps:
sleeving a blank to be formed on a spinning die with a groove, and compacting a first end of the blank to be formed with the spinning die;
Compressing a second end of the blank to be formed using an axial confinement ring to adjust an axial pressure on the blank to be formed during forming;
Driving the blank to be formed to rotate, extruding and forming the region of the blank to be formed with the groove, and spinning and forming the region without the groove;
And measuring the wall thickness of the formed thin-wall member with the inner ribs at the inner ribs, and performing local shape correction on the area which is not fully filled.
Further, the blank to be formed is sleeved on a spinning die with a groove, and the first end of the blank to be formed is pressed with the spinning die, specifically:
And sleeving the blank to be formed on a spinning die with a groove, and pressing the first end of the blank to be formed with the spinning die by using a tail top.
Further, the second end of the blank to be formed is pressed by using an axial constraint ring so as to adjust the axial pressure on the blank to be formed in the forming process, specifically:
two semicircular rings are sleeved on the spinning die and compress the second end of the blank to be formed, and the axial pressure of the blank to be formed is adjusted by adjusting the holding force of the spinning die.
Further, a set gap is reserved between the two semicircular rings, and an adjustment space is provided for fastening the two semicircular rings.
Further, the step of driving the blank to be formed to rotate, extruding and forming the region of the blank to be formed in the groove and spinning and forming the region without the groove specifically comprises the following steps:
The main shaft drives the spinning die and the blank to be formed to rotate, the spinning roller is moved to a set height along the axial direction of the spinning die, and set pressure is radially fed to the blank to be formed;
extruding and forming the blank to be formed at the groove of the spinning die through the rotation of the spinning wheel pair, so that the blank to be formed is filled into the groove;
And carrying out spinning forming on the non-groove part of the spinning die through the spinning roller, so that the blank to be formed is axially prolonged.
Further, the spinning forming is performed on the non-groove part of the spinning die through the spinning roller, so that the blank to be formed is prolonged along the axial direction of the blank to be formed, and the method further comprises the following steps:
radial restraining means are provided above/below the rotor to adjust the radial force on the blank to be formed.
Further, the measuring of the wall thickness of the inner rib of the formed thin-wall member with inner rib carries out local shape correction on the area which is not fully filled, specifically:
Measuring the wall thickness of the inner rib of the formed thin-wall member with the inner rib by using ultrasonic waves, and when the inner rib is judged to be unfilled, carrying out local shape correction on the unfilled region; wherein the forming track of the local correction is along the direction of the inner rib.
Further, the rotation linear speed of the spinning die is 300-700 m/min.
Further, the extrusion force of the spinning wheel is 200-600 kN.
The invention also provides an extrusion spinning forming tool with the inner rib thin-wall component, which comprises a spinning die, a spinning wheel, an axial constraint ring and a radial constraint device, wherein grid-shaped grooves are formed in the outer wall of the spinning die; the spinning roller is used for extruding and spinning a blank to be formed, wherein the blank to be formed is sleeved on the spinning die, the first end of the blank to be formed is compressed, the axial constraint ring is sleeved on the spinning die and used for compressing the second end of the blank to be formed, and the radial constraint device is attached to the spinning roller and used for adjusting the radial force of the blank to be formed.
(3) Advantageous effects
In summary, the invention adopts the axial/radial bidirectional constraint and the ingenious design of the track and the structure of the rotary wheel to the blank to be formed, thereby improving the filling efficiency and the filling precision, realizing the high-performance, high-precision and light-weight integral forming and manufacturing of the multi-stage grid rib member, reducing the machining procedures of the inner rib, forming the capability of quick manufacturing and quick copying, and realizing the high-efficiency and low-cost manufacturing of equipment such as carrier rockets.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.
FIG. 1 is a schematic flow diagram of an extrusion and spin forming method for a thin-walled member with internal ribs according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of extrusion forming of a thin-walled member with internal ribs according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of an axial confinement ring in an extrusion-spinning method for forming a thin-walled member with internal ribs according to an embodiment of the present invention;
fig. 4 is a schematic illustration of extrusion forming of another ribbed thin-walled member according to an embodiment of the present invention.
In the figure:
1-spinning a die; 2-rotating wheels; 3-an axial confinement ring; 4-radial restraint means; 100-blank to be formed.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the invention and are not intended to limit the scope of the invention, i.e., the invention is not limited to the embodiments described, but covers any modifications, substitutions and improvements in parts, components and connections without departing from the spirit of the invention.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
It should be understood that, in the present specification, each embodiment is described in an incremental manner, and the same or similar parts between the embodiments are all referred to each other, and each embodiment is mainly described in a different point from other embodiments. The invention is not limited to the specific steps and structures described above and shown in the drawings. Also, a detailed description of known method techniques is omitted here for the sake of brevity.
Fig. 1 is a schematic flow chart of an extrusion and spin forming method of a thin-walled member with internal ribs according to an embodiment of the present invention, as shown in fig. 1, the method includes the following steps:
S100, sleeving a blank to be formed on a spinning die with a groove, and compacting a first end of the blank to be formed with the spinning die;
S200, pressing a second end of the blank to be formed by using an axial constraint ring so as to adjust the axial pressure of the blank to be formed in the forming process;
s300, driving a blank to be formed to rotate, extruding and forming the blank to be formed in a region with a groove, and spinning and forming the blank to be formed in a region without the groove;
s400, measuring the wall thickness of the inner rib of the formed thin-wall member with the inner rib, and performing local shape correction on the area which is not fully filled.
In the above embodiment, by adopting the axial/radial bidirectional constraint and the ingenious design of the rotary wheel track and the structure of the blank to be formed, the filling efficiency and the filling precision are improved, so that the high-performance, high-precision and light-weight integral forming and manufacturing of the multi-stage grid rib member are realized, the machining procedures of the inner rib are reduced, the capability of rapid manufacturing and rapid copying is formed, and the high-efficiency and low-cost manufacturing of the carrier rocket and other equipment is realized.
The blank to be formed is generally in a rotary body structure and can be a cylinder body (a cylinder), a cone or a round table, so that the structure of the spinning die matched with the blank to be formed can also be in a cylindrical shape, a cone shape or a round table shape.
Specifically, the blank to be formed rotates along with the detachable split die, the rotary wheel axially feeds and exerts radial acting force on the blank to be formed to enable the blank to be formed to generate plastic deformation, and axial extension of the blank to be formed is restrained through axial damping constraint.
As a preferred embodiment, in step S100, the blank to be formed is sleeved on the grooved spinning die, and the first end of the blank to be formed is pressed against the spinning die, specifically:
and sleeving the blank to be formed on a spinning die with a groove, and pressing the first end of the blank to be formed with the spinning die by using the tail top.
As a preferred embodiment, in step S200, the second end of the blank to be formed is compressed using an axial constraint ring to adjust the axial pressure of the blank to be formed during the forming process, specifically:
Two semicircular rings are sleeved on the spinning die and compress the second end of the blank to be formed, and the axial pressure of the blank to be formed is adjusted by adjusting the holding force of the spinning die.
Specifically, the axial constraint ring is tightly held with the spinning die, and the purpose of blocking the flow of the blank to be formed is achieved through friction force between the constraint ring and the core die. The constraint ring can adopt an axial damping ring, the implementation form of the constraint ring is shown in fig. 3, two semicircular rings with the inner diameters consistent with that of the core mold are adopted, and the spinning mold is held tightly by a bolt fastening mode.
When the device cannot provide independent axial force, the damping ring can be used for replacing the axial constraint ring, and when the forming device is provided with functions, the damping ring can be supported by adopting the diameter of the ejector rod, so that the axial constraint force is provided for the metal blank. In order to keep the stress balance, the number of the ejector rods is not less than 3. Compared with the axial damping force, the axial restraining force of the ejector rod is more convenient to adjust, but the complexity of the structure and the driving of the forming equipment is improved.
As a preferred embodiment, in step S200, a set gap is reserved between the two semicircular rings and used to provide an adjustment space for fastening the two. A certain gap is reserved between the two semicircular rings, and an adjusting space is provided for fastening the bolts. The axial damping force is adjusted by tightness of the bolts, so that a means is provided for fine adjustment and control of the filling degree of the inner ribs.
In a preferred embodiment, in step S300, the blank to be formed is driven to rotate, and the blank to be formed is extruded in a grooved area and is spun in a non-grooved area, which specifically includes the following steps:
S301, driving a spinning die and a blank to be formed to rotate by a main shaft, moving a spinning roller to a set height along the axial direction of the spinning die, and radially feeding a set pressure to the blank to be formed;
S302, extruding and forming a blank to be formed at a groove of a spinning die through rotation of a spinning roller pair, so that the blank to be formed is filled into the groove;
s303, spinning forming is carried out on the non-groove part of the spinning die through a spinning roller pair, so that the blank to be formed is axially prolonged.
As a preferred embodiment, as shown in fig. 4, the blank 100 to be formed is elongated in the axial direction thereof by spin forming the non-groove portion of the spin die 1 with the spin wheel 2, and further comprises:
A radial restraining device 4 is provided above/below the rotor 2 to adjust the radial force of the blank 100 to be formed.
Specifically, the radial constraint is added to prevent the bulge of the to-be-deformed area of the blank 100 to be formed, and the spinning forming of the extrusion forming composite web of the rib part is realized, so that the material flows and is accurately filled into the inner rib part.
The axial constraint ring 3 causes difficult axial movement of the blank 100 to be formed in the forming process, the blank 100 to be formed is easy to expand in diameter or even locally bulge in the web spinning forming process, and the radial constraint device 4 is arranged on the spinning wheel 2 to improve the forming precision of parts. Of course, a separate radial restraint device 4 may be used to dynamically adjust the radial force to better control the flow and uniformity of the blank 100 to be formed.
In a preferred embodiment, in step S400, the wall thickness of the inner rib of the formed thin-walled member with inner rib is measured, and the partial correction is performed on the unfilled region, specifically:
Measuring the wall thickness of the inner rib of the formed thin-wall member with the inner rib by using ultrasonic waves, and when the inner rib is judged to be unfilled, carrying out local shape correction on the unfilled region; wherein, the shaping track of local school shape is along the direction of internal muscle.
The method comprises the steps of positioning a groove on a spinning die 1 in the process of local shape correction, aligning a spinning roller 2 with a starting point of the groove, and keeping a rotation angle consistent with a horizontal included angle of the groove. For the axial longitudinal ribs, the die does not rotate, the spinning wheel 2 radially feeds and axially moves, the axial ribs are subjected to point-by-point shape correction, after the shape correction of one rib is completed, the spinning die 1 rotates to the position of the next rib, and the shape correction of the previous rib is repeated; for circumferential ring ribs, the spinning die 1 rotates, the spinning roller 2 radially feeds without moving circumferentially, after the correction of one ring rib is completed, the spinning roller 2 withdraws and axially moves to the position of the next rib, and the correction of the previous rib is continuously repeated; for the oblique inner rib, the spinning die 1 is rotationally matched with the axial feeding of the spinning roller 2, so that the spiral track of the spinning roller 2 for pressing is consistent with the groove of the spinning die 1, after the correction of one inner rib is finished, the starting point position of the next rib is determined again, and the subsequent correction of the inner rib is finished continuously.
As a preferred embodiment, the linear speed of rotation of the spinning die is 300-700 m/min. The rotation speed of the spinning die 1 is in direct proportion to the diameter, and the circumferential linear speed is more suitable in the range of 300-700 m/min. The linear velocity is the product of the circumference of the mold and the rotational speed, and the rotational speed of the mold is determined by the linear velocity.
As a preferred embodiment, the extrusion force of the spinning wheel is 200-600 kN. The extrusion force of the roller 2 is related to the strength of the spinning blank and the size of the groove, and the larger the yield strength of the blank and the width of the groove, the larger the required radial extrusion force.
Fig. 4 is a drawing of an extrusion forming tool for a thin-walled member with internal ribs, provided by the embodiment of the invention, which comprises a spinning die1, a spinning wheel 2, an axial constraint ring 3 and a radial constraint device 4, wherein grid-shaped grooves are formed on the outer wall of the spinning die 1; the spinning roller 2 is used for carrying out extrusion spinning forming on a blank 100 to be formed, which is sleeved on the spinning die1 and is compressed at the first end of the blank, the axial constraint ring 3 is sleeved on the spinning die1 and is used for compressing the second end of the blank 100 to be formed, and the radial constraint device 4 is attached to the spinning roller 2 and is used for adjusting the radial force of the blank 100 to be formed.
In the above embodiment, the extrusion and spinning forming of the thin-wall member with the grid-shaped inner ribs can be realized by the forming tool, and the axial and radial bidirectional extrusion and spinning forming can be realized by the up-and-down movement and extrusion of the spinning wheel.
The forming tool of the invention utilizes the shaft/diameter bidirectional extrusion and spinning forming technology to integrate the advantages of extrusion forming and spinning forming, wherein the extrusion forming is carried out in the inner rib area of the blank 100 to be formed, and the spinning forming is carried out in the web area of the blank 100 to be formed.
The above is only an example of the present application and is not limited to the present application. Various modifications and alterations of this application will become apparent to those skilled in the art without departing from the scope of this application. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.
Claims (8)
1. The extrusion and rotation forming method of the thin-wall member with the inner rib is characterized by comprising the following steps of:
sleeving a blank to be formed on a spinning die with a groove, and compacting a first end of the blank to be formed with the spinning die;
Compressing a second end of the blank to be formed using an axial confinement ring to adjust an axial pressure on the blank to be formed during forming;
Driving the blank to be formed to rotate, extruding and forming the region of the blank to be formed with the groove, and spinning and forming the region without the groove;
measuring the wall thickness of the formed inner rib part of the thin-wall member with the inner rib, and performing local shape correction on the area which is not fully filled;
The method comprises the steps of driving the blank to be formed to rotate, extruding and forming the blank to be formed in a region with a groove and spinning and forming the blank in a region without the groove, and specifically comprises the following steps:
The main shaft drives the spinning die and the blank to be formed to rotate, the spinning roller is moved to a set height along the axial direction of the spinning die, and set pressure is radially fed to the blank to be formed;
extruding and forming the blank to be formed at the groove of the spinning die through the rotation of the spinning wheel pair, so that the blank to be formed is filled into the groove;
Carrying out spinning forming on the non-groove part of the spinning die through the spinning roller, so that the blank to be formed is axially prolonged;
Radial restraining devices are arranged above/below the spinning wheel to adjust the radial force on the blank to be formed, and radial restraining is added to prevent the bulge of the deformation zone of the blank to be formed.
2. The extrusion molding method of the ribbed thin-walled component according to claim 1, wherein the sleeving of the blank to be molded on the grooved spinning die compresses the first end of the blank to be molded with the spinning die, specifically:
And sleeving the blank to be formed on a spinning die with a groove, and pressing the first end of the blank to be formed with the spinning die by using a tail top.
3. The extrusion-spinning method of the ribbed thin-walled member according to claim 1, characterized in that the second end of the blank to be formed is compacted using an axial confinement ring to adjust the axial pressure on the blank to be formed during the forming process, in particular:
two semicircular rings are sleeved on the spinning die and compress the second end of the blank to be formed, and the axial pressure of the blank to be formed is adjusted by adjusting the holding force of the spinning die.
4. The extrusion-spinning method of the thin-walled member with inner ribs according to claim 3, wherein a set gap is reserved between the two semicircular rings and an adjustment space is provided for fastening the two semicircular rings.
5. The method for extrusion-spinning of a thin-walled member with internal ribs according to claim 1, wherein the measuring of the wall thickness at the internal ribs of the thin-walled member with internal ribs is performed to locally shape the unfilled region, specifically:
Measuring the wall thickness of the inner rib of the formed thin-wall member with the inner rib by using ultrasonic waves, and when the inner rib is judged to be unfilled, carrying out local shape correction on the unfilled region; wherein the forming track of the local correction is along the direction of the inner rib.
6. The extrusion molding method of an internally ribbed thin-walled member according to claim 1, characterized in that the rotational linear velocity of the spinning die is 300 to 700m/min.
7. The extrusion-spinning method for the thin-walled member with inner ribs according to claim 1, wherein the extrusion force of the spinning wheel is 200-600 kN.
8. An extrusion forming tool for the inner rib-containing thin-wall member by adopting the extrusion forming method for the inner rib-containing thin-wall member according to any one of claims 1 to 7, which is characterized by comprising a spinning die (1), a spinning wheel (2), an axial constraint ring (3) and a radial constraint device (4), wherein grid-shaped grooves are formed on the outer wall of the spinning die (1); the spinning roller (2) is used for extruding and spinning a blank (100) to be formed, wherein the blank is sleeved on the spinning die (1) and the first end of the blank is compressed, the axial constraint ring (3) is sleeved on the spinning die (1) and used for compressing the second end of the blank (100) to be formed, and the radial constraint device (4) is attached to the spinning roller (2) and used for adjusting the radial force of the blank (100) to be formed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210081304.XA CN114406080B (en) | 2022-01-24 | 2022-01-24 | Extrusion spin forming method and forming tool for thin-wall member with inner rib |
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| JP3499233B2 (en) * | 2002-03-22 | 2004-02-23 | 株式会社遠藤製作所 | Metal cylindrical body, method of manufacturing the same, and manufacturing apparatus |
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| CN113500181A (en) * | 2021-08-24 | 2021-10-15 | 中南大学 | Rotary extrusion forming method of reinforced cylinder shell |
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