CN114523027A - Circular steering spinning forming method for spiral rib cylinder capable of eliminating annular rib filling height difference - Google Patents
Circular steering spinning forming method for spiral rib cylinder capable of eliminating annular rib filling height difference Download PDFInfo
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- CN114523027A CN114523027A CN202210166922.4A CN202210166922A CN114523027A CN 114523027 A CN114523027 A CN 114523027A CN 202210166922 A CN202210166922 A CN 202210166922A CN 114523027 A CN114523027 A CN 114523027A
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- 238000009987 spinning Methods 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000005096 rolling process Methods 0.000 claims abstract description 7
- 238000004364 calculation method Methods 0.000 claims description 3
- 230000008030 elimination Effects 0.000 claims 1
- 238000003379 elimination reaction Methods 0.000 claims 1
- 101100334009 Caenorhabditis elegans rib-2 gene Proteins 0.000 description 8
- 238000005429 filling process Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process 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
Abstract
The invention belongs to the technical field of spinning forming, and particularly discloses a circular steering spinning forming method for a cylinder with spiral ribs, which is used for eliminating the height difference of circumferential rib filling.A cylindrical workpiece is fixed on a core mold provided with a spiral rib groove, a spinning wheel is arranged on the cylindrical workpiece, and the core mold circularly and alternately rotates in a clockwise direction and an anticlockwise direction and drives the cylindrical workpiece to rotate; and in the rotating process of the cylindrical workpiece, the spinning wheel performs axial feeding, so that the part of the cylindrical workpiece above the spiral rib groove of the core mold enters the spiral rib groove of the core mold under the rolling action of the spinning wheel to form spiral inner ribs, and the cylinder with the spiral inner ribs is obtained. According to the invention, the rotation direction of the core mold is changed circularly in the axial feeding process of the spinning wheel, so that the filling heights of the spiral inner ribs with different spinning directions are kept consistent, and the height difference of the spiral inner ribs with different spinning directions in the traditional single-turning spinning forming process of the cylindrical workpiece with the spiral inner ribs is eliminated. The invention is suitable for spinning forming of the cylinder with the spiral inner rib.
Description
Technical Field
The invention belongs to the technical field of spinning forming, and particularly relates to a circular steering spinning forming method for a cylinder with spiral ribs, which is used for eliminating the height difference of circumferential rib filling.
Background
The reinforcing rib that the muscle cylindric piece was crossed because of its inside design has two-way spiral in the area spiral can improve the holistic intensity of component and rigidity by a wide margin, is the key component that aerospace and weaponry field need urgently. The spinning can realize the filling of the inner rib of the component and the forming of the outline simultaneously through the local loading of the spinning wheel, and is an advantageous technology for realizing the high-performance integral forming and manufacturing of the cylindrical part with the spiral inner rib. However, because the annular part of the component has two spiral inner ribs with different rotation directions, the two spiral inner ribs with different rotation directions have the defect of unequal filling heights in the single-direction rotation mode of the traditional single-direction spinning core mold, and the forming quality of the component is seriously influenced. Therefore, how to control the filling height difference of the inner ribs of the spiral cylinder with the inner ribs in different directions in the traditional single-direction spinning forming becomes a key technical problem to be solved urgently in spinning forming of the cylinder with the inner ribs.
At present, no report exists on a method for eliminating the difference of filling heights of spiral inner ribs in different directions of spinning of a cylindrical part with the spiral inner ribs. The Xia, Q.X., Sun, L.Y., Cheng, X.Q., et al, 2009.analysis of the formation defects of the longitudinal inner rib-forming, processing of the International Conference on Industrial Engineering and Engineering Management, 2333-doping 2337. it was found that the formation of a longitudinally inner rib profile in a conventional single-turn spinning process suffers from the presence of an inner rib profile asymmetry, thereby proposing a forming method using two-pass spinning in which the core dies of the two passes use different directions of rotation, which method can reduce the degree of inner rib profile asymmetry to some extent. However, this method relies on the precise calculation of the division ratio of the rolling reduction of the spinning wheel for two passes, and this ratio is affected by a plurality of spinning process parameters, so this method is not versatile. And for the cylindrical part with the spiral inner rib, rib dislocation can occur when two spinning passes are adopted for forming, so that only one-pass spinning forming can be adopted, and the method is not suitable for eliminating the filling height difference of the spiral inner rib with different spinning directions in the spinning of the cylindrical part with the spiral inner rib.
Disclosure of Invention
The invention aims to provide a circular steering spinning forming method of a cylinder with spiral ribs, which is used for eliminating the height difference of circumferential rib filling, so as to eliminate the filling height difference of different spiral inner ribs of the cylinder with spiral inner ribs in the traditional single steering spinning forming.
In order to achieve the purpose, the technical method comprises the following steps:
a circular steering spinning forming method for a cylinder with spiral ribs for eliminating the height difference of circumferential rib filling is characterized in that a cylindrical workpiece is fixed on a core mold provided with spiral rib grooves, spinning wheels are arranged on the cylindrical workpiece, the core mold circularly and alternately rotates in a clockwise direction and an anticlockwise direction, and the cylindrical workpiece is driven to rotate; and in the rotating process of the cylindrical workpiece, the spinning wheel performs axial feeding, so that the part of the cylindrical workpiece above the spiral rib groove of the core mold enters the spiral rib groove of the core mold under the rolling of the spinning wheel to form a spiral inner rib, and the cylinder with the spiral inner rib is obtained.
As a limitation: the process that the core mold circularly and alternately rotates in the clockwise direction and the anticlockwise direction comprises the following steps: the core die rotates clockwise, the rotation speed is increased from 0 to S, the axial feeding of the S back spinning wheel is achieved, the feeding is stopped when the axial feeding stroke reaches delta z, the rotation speed starts to be reduced from S to 0, the core die rotates anticlockwise, the rotation speed is increased from 0 to S, the axial feeding of the S back spinning wheel is achieved, the feeding is stopped when the axial feeding stroke reaches delta z, and the rotation speed starts to be reduced from S to 0; the core mould circularly and alternately rotates in the clockwise direction and the anticlockwise direction according to the process; s is a preset rotational speed, and Δ z is a preset axial feed stroke.
As a further limitation: the calculation formula of the axial feed stroke Δ z is as follows:
in the formula, i is the times of rolling different spiral inner ribs in each rotating direction by the rotary wheel, f is the feeding ratio of the rotary wheel, and N is the number of the rotary wheels.
Due to the adoption of the scheme, compared with the prior art, the invention has the beneficial effects that:
(1) the invention provides a method for circularly turning and spinning a cylinder with spiral ribs for eliminating the height difference of annular rib filling, the rotation direction of the core mould is changed circularly in the axial feeding process of the spinning wheel, so that the loading track of the spinning wheel on the workpiece is changed from the single-spiral loading track in the traditional single-turning spinning into two circularly alternating spiral loading tracks with different turning directions, thereby leading the relative spiral direction of the spiral inner ribs with two different spiral directions and the distance between the circumferential ribs to be circularly changed, therefore, the filling trend of the two spiral inner ribs with different rotation directions in the filling process is strong and weak, and the quantity of the filling materials is also changed circularly, the difference of the filling trend strength of the two inner ribs and the difference of the filling amount of the filling materials can be eliminated in the filling process, and finally the filling height difference of the two spiral inner ribs with different rotation directions is eliminated.
(2) The method for circularly steering spinning forming of the spiral ribbed cylinder for eliminating the height difference of the circumferential rib filling can be carried out on the original traditional spinning platform, does not need to add other auxiliary devices, and is simple to operate.
The invention is suitable for spin forming of the cylinder with the spiral inner rib.
Drawings
The invention is described in further detail below with reference to the figures and the embodiments.
FIG. 1 is a schematic structural view of a cylinder with a spiral inner rib;
FIG. 2 is a schematic view of a circular steering spinning forming method of a cylinder with spiral ribs for eliminating height difference of circumferential rib filling;
FIG. 3 is a graph showing the relationship between the core mold rotation speed and the axial feed stroke of the spinning roller as a function of time;
FIG. 4 is a schematic diagram showing a comparison of different heights of the helical inner ribs in different directions on a cross section of a barrel with the helical inner ribs;
FIG. 5 is a helical loading path with the mandrel rotated counterclockwise and rotated clockwise;
in the figure: 1. right-handed spiral inner ribs; 2. left-handed spiral inner ribs; 3. a core mold; 4. a spiral rib groove; 5. rotating the wheel; 6. a cylindrical workpiece; 7. a spiral inner rib; 8. a right-handed helical loading trajectory; 9. the left hand spiral loads the trajectory.
Detailed Description
The present invention is further described with reference to the following examples, but it should be understood by those skilled in the art that the present invention is not limited to the following examples, and any modifications and equivalent changes based on the specific examples of the present invention are within the scope of the claims of the present invention.
Embodiment circular steering spinning forming method for spiral ribbed cylinder capable of eliminating annular rib filling height difference
The structural schematic diagram of the cylinder with the spiral inner ribs 7 is shown in fig. 1, the cylinder is of a hollow thin-wall structure, the inner surface of the cylinder comprises two spiral inner ribs 7 with different rotation directions, namely a right-rotation-direction spiral inner rib 1 and a left-rotation-direction spiral inner rib 2, and the two spiral inner ribs 7 with different rotation directions are distributed in a crossed manner, so that the overall strength and rigidity of the hollow thin-wall cylinder can be greatly improved.
A circular steering spinning forming method for a cylinder with spiral ribs for eliminating the height difference of circular rib filling is shown in a schematic diagram of fig. 2, and specifically comprises the steps that a cylindrical workpiece 6 is fixed on a core mold 3 provided with a spiral rib groove 4, a spinning wheel 5 is arranged on the cylindrical workpiece 6, the core mold 3 circularly and alternately rotates in a clockwise direction and an anticlockwise direction, and the cylindrical workpiece 6 is driven to rotate; and in the rotation process of the cylindrical workpiece 6, the spinning wheel 5 performs axial feeding, so that the part of the cylindrical workpiece 6 above the spiral rib groove 4 of the core mold 3 enters the spiral rib groove 4 of the core mold 3 under the rolling of the spinning wheel 5 to form a spiral inner rib 7, and a cylinder with the spiral inner rib 7 is obtained.
The process of the mandrel 3 circularly and alternately rotating in the clockwise and counterclockwise directions is as follows: the core mould 3 rotates clockwise, the rotation speed is increased from 0 to S, the axial feeding of the S back spinning wheel is achieved, the feeding is stopped when the axial feeding stroke reaches delta z, the rotation speed starts to be reduced from S to 0, the core mould rotates anticlockwise, the rotation speed is increased from 0 to S, the axial feeding of the S back spinning wheel is achieved, the feeding is stopped when the axial feeding stroke reaches delta z, and the rotation speed starts to be reduced from S to 0; the core mold 3 circularly and alternately rotates in the clockwise direction and the counterclockwise direction according to the process; s is a preset rotational speed, and Δ z is a preset axial feed stroke.
Fig. 3 shows a relationship between the rotation speed of the core mold 3 and the axial feed stroke of the spinning roller 5 with time, and the axial feed stroke Δ z is calculated by the following formula:
wherein i is the number of times that the different spiral inner ribs 7 are rolled by the spinning wheel 5 in each rotating direction, f is the feeding ratio of the spinning wheel 5, namely the ratio of the feeding speed of the spinning wheel 5 to the rotating speed of the core mold 3, and the unit is mm/r, and N is the number of the spinning wheels 5.
The number of times that the different spiral inner ribs 7 in each rotating direction are rolled by the rotating wheel 5 is generally 1-4, namely, i is 1,2,3, 4; the feeding ratio range commonly used for spinning the cylindrical part is 0.5-3.0mm/r, namely f is 0.5-3.0 mm/r; the cylindrical part is usually spun by a single spinning wheel, a double spinning wheel or a triple spinning wheel, namely N is 1,2 and 3; in the embodiment, the number of times that the different spiral inner ribs 7 in each rotation direction are rolled by the rotary wheel 5 is 2, that is, i is 2, the feed ratio f is 1.5mm/r, and the number N of the rotary wheels 5 is 2, so that the axial feed stroke Δ z is 1.5 mm; the rotating speed of the core mold in the spinning process is generally 30-300r/min, and the large vibration of a machine tool can be caused by the large rotating speed in the inner rib filling process, so that S is 60r/min in the embodiment;
in the traditional single-turn spinning forming, the core mold 3 rotates anticlockwise and corresponds to a right-handed spiral loading track to obtain a barrel piece with a spiral inner rib 7, a comparison schematic diagram of the heights of the spiral inner ribs 7 with different handedness on one cross section is shown in fig. 4(a), and the height of the right-handed spiral inner rib 1 is H'RThe height of the left-handed spiral inner rib 2 is H'L,H′R≠H′L(ii) a A schematic diagram of comparison of heights of the spiral inner ribs 7 with different directions of rotation on the same cross section of the barrel with the spiral inner ribs 7 obtained by the method of the embodiment is shown in fig. 4(b), and the right-handed spiral inner ribs1 has a height HRThe height of the left-handed spiral inner rib 2 is HL,HR＝HL。
A right-handed spiral loading track 8 of the core mold 3 rotating counterclockwise is shown in fig. 5(a), and at this time, the relative spiral directions of the right-handed spiral inner rib 1 and the right-handed spiral loading track 8 are the same, so that the right-handed spiral inner rib 1 shows a weak filling tendency in the filling process; and the opposite spiral direction of the left-handed spiral inner rib 2 and the right-handed spiral loading track 8 is opposite, and the strong filling trend is shown in the filling process. Meanwhile, on the same cross section as shown in fig. 5(a), the circumferential rib spacing D of the right-handed helical inner rib 11Smaller, and the circumferential rib spacing D of the left-handed spiral inner rib 22Larger, so that the right-handed helical inner rib 1 has less filling material during filling at the position of the cross section, and the left-handed helical inner rib 2 has more filling material during filling. The left-handed spiral loading track 9 of the core mold 3 rotating clockwise is shown in fig. 5(b), and at this time, the opposite spiral directions of the right-handed spiral inner rib 1 and the left-handed spiral loading track 9 are opposite, so that the right-handed spiral inner rib 1 shows a strong filling tendency in the filling process; and the relative spiral directions of the left-handed spiral inner rib 2 and the left-handed spiral loading track 9 are the same, and the filling process shows a weak filling trend. Meanwhile, in fig. 5(b), the circumferential rib pitch D of the right-handed spiral inner rib 11Larger, and left-handed spiral inner rib 2 circumferential rib spacing D2Smaller, so that the right-handed helical inner rib 1 has more filling material during filling at the cross-sectional position, and the left-handed helical inner rib 2 has less filling material during filling. In conclusion, the relative spiral directions and the circumferential rib intervals of the spiral inner ribs 7 of the two different spiral directions are mutually switched when the core mold 3 rotates anticlockwise and clockwise. Therefore, by adopting the method of circularly turning the core mold 3, the filling trend strength and the amount of the fillable material of the two spiral inner ribs 7 with different turning directions can be circularly changed in the filling process, so that the difference between the filling trend strength and the amount of the fillable material of the two spiral inner ribs 7 with different turning directions is eliminated, and the difference between the filling heights of the two spiral inner ribs 7 with different turning directions is finally eliminated.
Claims (3)
1. A circular steering spinning forming method for a cylinder with spiral ribs for eliminating the height difference of circular rib filling is characterized in that a cylindrical workpiece is fixed on a core mold provided with spiral rib grooves, spinning wheels are arranged on the cylindrical workpiece, and the core mold circularly and alternately rotates in a clockwise direction and an anticlockwise direction and drives the cylindrical workpiece to rotate; and in the rotating process of the cylindrical workpiece, the spinning wheel performs axial feeding, so that the part of the cylindrical workpiece above the spiral rib groove of the core mold enters the spiral rib groove of the core mold under the rolling of the spinning wheel to form a spiral inner rib, and the cylinder with the spiral inner rib is obtained.
2. The method for circularly turning and spinning the ribbed drum with the spiral ribs for eliminating the height difference of the circumferential ribs according to claim 1, wherein the process that the core mold circularly and alternately rotates in the clockwise direction and the counterclockwise direction comprises the following steps: the core die rotates clockwise, the rotation speed is increased from 0 to S, the axial feeding of the S back spinning wheel is achieved, the feeding is stopped when the axial feeding stroke reaches delta z, the rotation speed starts to be reduced from S to 0, the core die rotates anticlockwise, the rotation speed is increased from 0 to S, the axial feeding of the S back spinning wheel is achieved, the feeding is stopped when the axial feeding stroke reaches delta z, and the rotation speed starts to be reduced from S to 0; the core mould circularly and alternately rotates in the clockwise direction and the anticlockwise direction according to the process; s is a preset rotational speed, and Δ z is a preset axial feed stroke.
3. The circular steering spinning forming method for the spiral ribbed cylinder with the elimination of the annular rib filling height difference according to claim 2, wherein the calculation formula of the axial feeding stroke Δ z is as follows:
in the formula, i is the times of rolling different spiral inner ribs in each rotating direction by the rotary wheel, f is the feeding ratio of the rotary wheel, and N is the number of the rotary wheels.
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| CN202210166922.4A CN114523027B (en) | 2022-02-23 | 2022-02-23 | Circular turning spinning forming method for spiral rib cylinder capable of eliminating height difference of circumferential rib filling |
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| CN113245428A (en) * | 2021-06-21 | 2021-08-13 | 西北工业大学 | Oblique rolling type spinning forming method for cylindrical part with inner ribs |
| CN113500181A (en) * | 2021-08-24 | 2021-10-15 | 中南大学 | Rotary extrusion forming method of reinforced cylinder shell |
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- 2022-02-23 CN CN202210166922.4A patent/CN114523027B/en active Active
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| CN109396262A (en) * | 2018-10-12 | 2019-03-01 | 西北工业大学 | One kind is for rib spinning core die and release method in band spiral |
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| DE102019106209A1 (en) * | 2019-03-12 | 2020-09-17 | Federal-Mogul Valvetrain Gmbh | Process for the production of a hollow valve for internal combustion engines |
| CN110586730A (en) * | 2019-09-17 | 2019-12-20 | 上海交通大学 | Finished product of cylindrical part with inner wall longitudinal ribs and forming method thereof |
| CN113245428A (en) * | 2021-06-21 | 2021-08-13 | 西北工业大学 | Oblique rolling type spinning forming method for cylindrical part with inner ribs |
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Non-Patent Citations (1)
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| 张利鹏等: "带内筋筒形件强力旋压成形试验研究", CMET.锻压装备与制造技术, no. 04, pages 86 - 87 * |
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