CN114192647B - Shearing forming method for annular outer rib cylindrical part - Google Patents
Shearing forming method for annular outer rib cylindrical part Download PDFInfo
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- CN114192647B CN114192647B CN202111514553.5A CN202111514553A CN114192647B CN 114192647 B CN114192647 B CN 114192647B CN 202111514553 A CN202111514553 A CN 202111514553A CN 114192647 B CN114192647 B CN 114192647B
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- 238000010008 shearing Methods 0.000 title claims abstract description 124
- 238000000034 method Methods 0.000 title claims abstract description 56
- 230000008569 process Effects 0.000 claims abstract description 28
- 238000009987 spinning Methods 0.000 claims description 66
- 230000000903 blocking effect Effects 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 230000033001 locomotion Effects 0.000 claims description 5
- 230000004323 axial length Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 2
- 241000276420 Lophius piscatorius Species 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 10
- 239000002184 metal Substances 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 2
- 239000011324 bead Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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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 belongs to the technical field of metal plastic processing, and discloses a shearing forming method of an annular external rib cylindrical part. According to the principle of shearing separation and shearing deformation of materials and the characteristic of a local forming process, the invention solves the problem that the outer rib structure is difficult to form in the traditional process, and can realize high-dimensional accurate forming of the thin-wall annular outer rib cylindrical part.
Description
Technical Field
The invention belongs to the technical field of metal plastic processing, relates to a forming process of an annular outer rib cylindrical part, and particularly relates to a shearing forming method of the annular outer rib cylindrical part.
Background
With the rapid development of the fields of aerospace, advanced weaponry and the like, the demand for ribbed structural members is increasing. The prior art has great limitation on the forming of the thin-wall annular outer rib cylindrical part due to the special structure of the thin-wall annular outer rib cylindrical part. At present, when the thin-wall annular outer rib cylindrical part is formed in engineering, the outer rib is connected with the cylinder body most often by adopting a welding technology, but the thin-wall annular outer rib cylindrical part formed in the mode is difficult to avoid weld joints, so that the precision of the outer rib cylindrical part is reduced, and the safety and reliability of the outer rib cylindrical part are affected to a certain extent. Therefore, there is an urgent need to develop a high dimensional precision forming process suitable for thin-walled annular outer rib cylindrical members.
1. In order to directly form a cylindrical member from a flat plate blank, (Li Ping, light-substituted Asahi, yang Weizheng, etc. finite element analysis and experimental study of shoveling process [ J ]. Shanghai university of traffic, university of China, 2019 (6)), a special spinning technique, shoveling, is proposed in which a compressive stress is applied to a flat plate blank by means of the feeding action of a spinning wheel, namely, the flat plate blank is applied with a stress by the spinning wheel, and material accumulation occurs, thereby realizing the manufacture of an inner wall cylinder. However, in the process, plastic deformation of the bottom of the flat blank is difficult to occur, so that uneven phenomenon is easy to occur on the bottom of the flat blank, and the quality of a finally formed component is often poor. Moreover, the process is mainly aimed at manufacturing the inner cylinder of the double-cylinder-shaped part with the flange plate, and is not suitable for forming the thin-wall annular outer rib cylinder-shaped part.
2. With the aim of realizing the formation of the flange structure and the differential distribution of the wall thickness of the integral member through one procedure, in the chinese patent application document with application publication No. CN 113020516A, a plate forging process is proposed: firstly, drawing and preforming a plate material to form the plate material into a cylindrical blank, then shearing and extruding the outer side of the cylindrical blank through the movement of a die at the outer side of a male die, so that the material is subjected to shearing deformation to form a cylindrical part with a flange, and finally forming a structural part with an outer rib. The process combines the deep drawing process and the shearing and extruding action of the male die, and has strict requirements on the thickness of the cylindrical part blank.
In summary, the plastic forming process of the cylindrical part in the prior art has a certain limitation, and is difficult to be suitable for high-dimensional accurate forming of the thin-wall annular outer rib cylindrical part.
Disclosure of Invention
The invention aims to provide a shearing forming method for an annular outer rib cylindrical part, which aims to solve the problem that an annular outer rib structural part is difficult to form in the traditional plastic forming process, and further realizes the purpose of high-dimensional accurate forming of a thin-wall annular outer rib cylindrical part.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a shearing forming method of annular external rib cylindrical part is based on the spinning forming process of cylindrical part, radial constraint is applied to cylindrical part blank by adopting an annular back pressure die, a shearing roller is selected, and the working angle of the shearing roller is adjusted at the same time, so that the shearing working face of the shearing roller is contacted with the cylindrical part blank in an assembling face manner, and the cylindrical part blank is sheared and formed until the annular external rib is formed.
As the limitation of the invention, the annular back pressure die is of a split combined and assembled annular structure, and one end surface of the annular back pressure die is a side baffle surface; after the annular back pressure die is mounted to the numerical control spinning machine, the side blocking surface is positioned on one side close to the shearing spinning wheel.
As a further limitation of the invention, the height of the side baffle surface of the annular back pressure die is 15-30 mm greater than the expected forming height of the annular outer rib.
As another definition of the present invention, based on the spin forming process of a cylindrical member, the method includes the steps of:
s1, manufacturing a cylinder blank: machining the end part of the original cylindrical part to prepare a cylindrical part blank with a shoulder pressing at one end;
s2, mounting a die: clamping a cylindrical part blank at a mandrel of a numerical control spinning machine, applying radial constraint to the cylindrical part blank by using an annular back pressure die, and adjusting a shearing rotary wheel to enable a shearing working surface of the shearing rotary wheel to be in contact with the cylindrical part blank in an assembly surface mode;
s3, shearing and spinning: starting a numerical control spinning machine, setting the rotation speed omega of a mandrel, and enabling the cylindrical part blank to circumferentially rotate under the drive of the mandrel; simultaneously, setting the shearing quantity x and the axial feeding speed v of the shearing rotary wheel, and controlling the shearing rotary wheel to perform axial feeding movement until reaching a set value of the axial feeding distance y, so as to prepare and form an annular outer rib cylindrical part;
s4, unloading operation: and (3) radially withdrawing the shearing rotary wheel, and demoulding and taking the formed annular outer rib cylindrical part out of the mandrel after the rotary wheel unloading operation is carried out.
As a further definition of the invention, the mandrel, the barrel blank and the annular back pressure die are integrally connected by fastening bolts from inside to outside in the method.
As a still further definition of the invention, the annular back pressure in the processThe die is in clearance fit with the cylindrical member blank, and the axial length of the annular back pressure die is determined according to the size of the cylindrical member blank: when the shearing quantity x of the shearing rotary wheel is 1/5 of the thickness t of the blank of the cylindrical part, the shearing quantity x of the shearing rotary wheel and the length l of the blank of the cylindrical part 1 And annular back pressure die 2 Ratio of difference valuesWhen the shearing quantity x of the shearing rotary wheel is 1/10 of the thickness t of the blank of the cylindrical part, the shearing quantity x of the shearing rotary wheel and the length l of the blank of the cylindrical part 1 And annular back pressure die 2 Ratio of difference->
As still further limitation of the invention, 2 shearing spinning wheels are arranged in the method and are symmetrically arranged on a spinning frame of the numerical control spinning machine, and the shearing spinning wheels are double-sided forming spinning wheels and comprise an upper shearing working surface and a lower shearing working surface, wherein an included angle between the upper shearing working surface and the lower shearing working surface is 90 degrees; the upper shearing working surface and the lower shearing working surface are in transitional connection through a convex arc shearing angle.
As a further definition of the invention, the fillet diameter r=0.1 to 1.5mm of the convex arc shear angle.
Based on the characteristic of partial loading progressive (spinning) forming, the central axis of the shearing spinning wheel and the central axis of the mandrel are distributed at a certain angle, and the shearing spinning wheel is fully utilized to promote the material to flow along the radial direction and the axial direction; the annular back pressure die is additionally arranged, so that the rigidity of the cylindrical part blank is ensured, the defects of wrinkling, instability and the like in the forming process are prevented, and meanwhile, the extrusion effect can be applied together with the shearing working face of the shearing rotary wheel to the formed rib part structure in the later forming stage, so that the outer rib structure is finally formed.
By adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
(1) According to the principle of shearing separation and shearing deformation of materials and the characteristic of a local forming process, the problem that the forming of the external rib structure is difficult in the traditional process is solved, and finally, the high-dimensional accurate forming of the thin-wall annular external rib cylindrical part is realized.
The invention realizes the integral formation of the member through the local deformation of the material, avoids the introduction of welding seams, and effectively improves the forming precision and the structural reliability of the cylindrical member. The shearing rotating wheel and the material are in relative periodic movement during shearing forming, and the stacked material is subjected to regular circumferential and radial metal flow, so that the tissue performance of the outer rib can be effectively improved, and the annular outer rib is beneficial to nearly uniform forming.
(2) In the process method provided by the invention, the formed annular external rib characteristic structure of the cylindrical part is not limited by geometric factors of a shearing forming die and a cylindrical blank, and the annular external ribs with different structures (aspect ratio) can be manufactured by only controlling the axial feeding distance y and the shearing amount x of the shearing rotary wheel. In addition, the process method has low requirements on required equipment, fewer processing passes and reduced energy consumption while improving the production efficiency.
(3) The annular back pressure die is connected with the blank of the cylindrical part and the mandrel through the fastening bolts, so that the influence of sliding friction of the annular back pressure die on the surface quality of the blank of the cylindrical part in the forming process is reduced; and the split combined assembly type structure of the annular back pressure die is favorable for disassembly after the work is completed.
Drawings
The invention will be described in more detail below with reference to the accompanying drawings and specific examples.
FIG. 1 is a schematic view of a shear forming apparatus according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the structural relationship of a shear spinning wheel in an embodiment of the invention;
FIG. 3 is a schematic view of an annular back pressure spinning wheel according to an embodiment of the present invention; FIG. 3a is a top view of the structural relationship of the annular back pressure spinning wheel; FIG. 3b is a cross-sectional view of the structural relationship of the annular back pressure spinning wheel;
FIG. 4 is a schematic view of deformation of a workpiece during shear forming in accordance with an embodiment of the present invention;
FIG. 5 is a physical view of an annular outer rib cylindrical part manufactured by the process method provided by the embodiment of the invention;
in the figure: 1. a cylindrical member blank; 2. an annular back pressure die; 3. a mandrel; 4. a shearing rotary wheel; 5. an arc-shaped mold; 6. a blind hole; 7. a side blocking surface; 8. cutting the working surface; 9. and cutting the working surface.
Detailed Description
Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are presented for purposes of illustration and understanding only, and are not intended to limit the invention.
Embodiment a shearing forming method for annular outer rib cylindrical part
Based on the spin forming process of the cylindrical part, the embodiment selects the shearing spinning roller 4 and changes the working angle of the shearing spinning roller 4, so that the shearing working surface of the shearing spinning roller 4 is in contact with the cylindrical part blank 1 in an assembly surface mode, and the adjustment of the working mode of the spinning roller is realized: the single spinning working mode is changed into a shearing-spinning combined working mode; at the same time, radial constraint is applied to the cylindrical member blank 1 during the shear spinning process using the annular back pressure die 2. The method specifically comprises the following steps:
s1, manufacturing a cylinder blank: the original cylindrical member to be machined is machined, after the circumferential hole is formed, the end portion of the original cylindrical member is machined to be pressed with a shoulder, and a cylindrical member blank 1 with the pressed shoulder at one end is prepared.
S2, mounting a die: clamping the cylindrical part blank 1 with the annular back pressure die 2 to a mandrel 3 of the numerical control spinning machine, and adjusting the shearing spinning wheel 4 to enable the central axis of the shearing spinning wheel to be distributed at a certain angle with the axis of the mandrel 3.
The annular back pressure die 2 is used for radially restraining the cylindrical part blank 1, so that the rigidity of the cylindrical part blank 1 can be increased, and the cylindrical part blank 1 is prevented from being broken and unstable in the shearing forming process. In this embodiment, the annular back pressure mold 2 is of a split assembled annular structure, as shown in fig. 3a, the annular back pressure mold 2 is equally divided into four arc molds 5 along the circumferential direction thereof, and each arc mold 5 is provided with a blind hole 6 on the circumferential surface thereof.
Further, as shown in fig. 3b, one of the end faces of the annular back pressure die 2 is a side blocking surface 7, and when the annular back pressure die 2 is mounted on the numerical control spinning machine, the side blocking surface 7 is located at one side close to the shearing spinning wheel 4, so that pressure is applied to the annular outer rib surface by matching with the shearing spinning wheel 4 at the end of forming, and further forming quality of the annular outer rib structure is guaranteed. The height of the side baffle surface 7 in the annular back pressure die 2 in the embodiment is mainly determined by the height of the annular outer rib to be formed, and is generally 15-30 mm greater than the expected forming height of the annular outer rib.
The installation operation of the annular back pressure die 2 is specifically as follows: firstly, clamping a cylindrical part blank 1 to a mandrel 3 of a numerical control spinning machine, then assembling an annular back pressure die 2 on the cylindrical part blank 1, aligning blind holes 6 on the annular back pressure die 2 and through holes on the cylindrical part blank 1 with threaded holes on the mandrel 3 one by one, and then connecting the three into a whole by using a fastening bolt to ensure concentricity of the cylindrical part blank 1 in the forming process, as shown in fig. 1 or 4.
The angle adjustment operation of the shear spinning wheel 4 is as follows: the shearing rotary wheel 4 is arranged on a rotary wheel frame of the numerical control spinning machine, and then the position of the rotary wheel frame is adjusted through the numerical control spinning machine until the shearing working surface of the shearing rotary wheel 4 contacts with the cylindrical part blank 1 in an assembling surface mode.
In this embodiment, 2 shearing spinning wheels 4 are provided in total, and as shown in fig. 1 or fig. 4, the shearing spinning wheels are symmetrically arranged on a spinning frame of the numerical control spinning machine. The shear spinning wheel 4 in this embodiment is a double-sided forming spinning wheel of a solid structure. As shown in fig. 2 in particular, each of the shear rotors 4 includes an upper shear face 8 and a lower shear face 9 connected by a convex circular arc shear angle transition, and the angle between the upper shear face 8 and the lower shear face 9 is 90 °. Wherein, the fillet diameter R=0.1-1.5 mm of the convex arc shearing angle.
The contact mode of the assembly surface in this embodiment specifically refers to: the upper shearing working surface 8 and the lower shearing working surface 9 of the shearing rotary wheel 4 are respectively in vertical and parallel assembly relation with the axial direction of the cylindrical part blank 1, namely, the lower shearing working surface 9 of the shearing rotary wheel 4 is in parallel contact with the side wall surface of the cylindrical part blank 1, and the convex arc shearing angle of the shearing rotary wheel 4 is positioned at the shoulder pressing position of the cylindrical part blank 1.
S3, shearing and spinning: and starting the numerical control spinning machine, setting related technological parameters through a numerical control system, and controlling the shearing rotary wheel 4 to shear and shape the cylindrical part blank 1.
Starting a numerical control spinning machine, and controlling the mandrel 3 to drive the cylindrical part blank 1 to circumferentially rotate at the speed omega; simultaneously, the shearing amount x (shoulder height) of the shearing rotary wheel 4 is set, and the shearing rotary wheel 4 is controlled to perform axial feeding motion at the speed v until reaching the set value y of the axial feeding distance, so that the annular outer rib cylindrical part is prepared.
It should be noted that, for the cylindrical member blank 1 of which the geometric parameters are determined, the characteristics of the annular outer bead (bead height and bead width) can be adjusted according to the amount of cutting-in and the amount of axial feeding of the cutting-spinning wheel 4. The method comprises the following steps: if the required annular outer rib height-width ratio (rib height/rib width) is smaller than 2, the shearing amount x of the cylindrical member blank 1 needs to be increased, and the length l of the cylindrical member blank 1 is reduced 1 And annular back pressure die 2 length l 2 I.e. the difference between the amount x of shear of the shear roller 4 and the length l of the tubular member blank 1 1 And annular back pressure die 2 length l 2 Ratio of difference valuesThe required height-width ratio of the annular external rib is larger than 2, so that the shearing quantity and the axial feeding quantity are required to be increased simultaneously, and the distance between the shearing working surface of the shearing rotary wheel 4 and the side blocking surface 7 of the annular back pressure die 2 at the end of forming is reduced.
The size of the annular back pressure die 2 can be correspondingly adjusted for cylindrical part blanks 1 with different specifications, specifically: the annular back pressure die 2 is always in clearance fit with the cylindrical member blank 1, i.e. the inner diameter of the annular back pressure die 2 is always greater than or equal to the outer diameter of the cylindrical member blank 1. The axial length of the annular back pressure die 2 is determined according to the size of the cylindrical part blank 1: when the shearing quantity x of the shearing rotary wheel 4 is 1/5 of the thickness t of the cylindrical member blank 1, the shearing quantity x of the shearing rotary wheel 4 and the length l of the cylindrical member blank 1 1 And annular back pressure die 2 length l 2 Ratio of difference valuesWhen the shearing rotary wheel 4 shears the amount x into a cylinderThe shearing amount x of the shearing rotary wheel 4 and the length l of the cylindrical piece blank 1 are 1/10 of the thickness t of the piece blank 1 1 And annular back pressure die 2 length l 2 Ratio of difference values
S4, unloading operation: and radially withdrawing the shearing rotary wheel 4, demolding and taking out the piece, and discharging the formed annular outer rib cylindrical piece from the mandrel 3.
Unloading the spinning roller, namely withdrawing the shearing spinning roller 4 after the shearing spinning forming is finished, and controlling the numerical control spinning machine to execute the unloading operation of the spinning roller;
and (3) unloading the annular outer rib cylindrical part: after the rotary wheel unloading operation is completed, the fastening bolts are disassembled so that the annular back pressure die 2 can be separated from the annular outer rib cylindrical part; and then, the mandrel 3 is dismounted by adopting an ejection mode of a hydraulic cylinder of the numerical control spinning machine, and then the annular outer rib cylindrical part is separated from the mandrel 3, so that the unloading operation is finished.
It should be further demonstrated that according to the shear forming method provided in this embodiment, the annular outer rib is formed on the cylindrical member blank 1 having a thickness t of 15mm, a shoulder height (cut-in thickness) of 1.5mm, and a shoulder width of 5mm. In the shearing spinning process, the mandrel 3 is specifically set to drive the cylindrical part blank 1 to circumferentially rotate at the speed omega=120 rad/mi; at the same time, the shear rotor 4 is controlled to feed axially 15mm at a speed v=60 mm/min with a cut-in x=1.5 mm. Finally, an annular outer rib cylindrical part with the average rib height of 17mm and the maximum rib height difference of not more than 0.5mm is formed. As shown in FIG. 5, the surface quality of the finally manufactured annular external rib is good, no macro-cracks and defects exist, and the purpose of high-dimensional accurate forming of the thin-wall annular external rib cylindrical part can be realized by further verifying the process method provided by the embodiment.
It should be noted that the foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but the present invention is described in detail with reference to the foregoing embodiment, and it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A shearing forming method of an annular outer rib cylindrical part is based on a cylindrical part spinning forming process and is characterized in that: radial constraint is applied to the cylindrical part blank by adopting an annular back pressure die, a shearing rotary wheel is selected, and the working angle of the shearing rotary wheel is adjusted at the same time, so that the shearing working surface of the shearing rotary wheel is contacted with the cylindrical part blank in an assembly surface mode, and the cylindrical part blank is sheared and formed until an annular outer rib is formed;
the annular back pressure die is of a split combined assembled annular structure, and one end face of the annular back pressure die is a side blocking face; when the annular back pressure die is mounted on the numerical control spinning machine, the side blocking surface is positioned on one side close to the shearing spinning wheel, and the height of the side blocking surface is 15-30 mm greater than the expected forming height of the annular outer rib;
the method specifically comprises the following steps:
s1, manufacturing a cylinder blank: machining the end part of the original cylindrical part to prepare a cylindrical part blank with a shoulder pressing at one end;
s2, mounting a die: clamping a cylindrical part blank at a mandrel of a numerical control spinning machine, applying radial constraint to the cylindrical part blank by using an annular back pressure die, and adjusting a shearing rotary wheel to enable a shearing working surface of the shearing rotary wheel to be in contact with the cylindrical part blank in an assembly surface mode;
s3, shearing and spinning: starting a numerical control spinning machine, and setting the rotation speed of a mandrelωEnabling the cylindrical part blank to circumferentially rotate under the drive of the mandrel; simultaneously, the shearing amount of the shearing rotary wheel is setxAxial feed speedvControlling the shearing rotary wheel to perform axial feeding movement until reaching the axial feeding distanceyPreparing a cylindrical part with annular outer ribs;
s4, unloading operation: and (3) radially withdrawing the shearing rotary wheel, and demoulding and taking the formed annular outer rib cylindrical part out of the mandrel after the rotary wheel unloading operation is carried out.
2. A method of shear forming an annular outer rib cylindrical member according to claim 1, wherein: in the method, a mandrel, a cylindrical part blank and an annular back pressure die are connected into a whole from inside to outside through fastening bolts.
3. A method of shear forming an annular outer rib cylindrical member according to claim 1 or 2, wherein: in the method, an annular back pressure die is in clearance fit with a cylindrical part blank, and the axial length of the annular back pressure die is determined according to the size of the cylindrical part blank: when the shearing rotary wheel shears in the amountxThickness of cylindrical part blanktA kind of electronic device1/5During the process, the shearing rotary wheel shears in an amountxLength of cylindrical member blankl 1 And annular back pressure diel 2 A ratio of the differences; when the shearing rotary wheel shears in the amountxThickness of cylindrical part blanktA kind of electronic device1/10During the process, the shearing rotary wheel shears in an amountxLength of cylindrical member blankl 1 And annular back pressure diel 2 The ratio of the differences.
4. A method of shear forming an annular outer rib cylindrical member according to claim 3, wherein: the method comprises the steps that 2 shearing spinning wheels are arranged in total and symmetrically arranged on a spinning frame of a numerical control spinning machine, and the shearing spinning wheels are double-sided forming spinning wheels and comprise an upper shearing working surface and a lower shearing working surface, wherein an included angle between the upper shearing working surface and the lower shearing working surface is 90 degrees; the upper shearing working surface and the lower shearing working surface are in transitional connection through a convex arc shearing angle.
5. A method of shear forming an annular outer rib cylindrical member according to claim 4, wherein: fillet diameter of convex arc shearing angleR=0.1～1.5mm。
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| CN115890157A (en) * | 2022-12-15 | 2023-04-04 | 西北工业大学 | Machining method of large thin-wall flange |
| CN117066338B (en) * | 2023-08-24 | 2024-08-16 | 哈尔滨工业大学 | Constrained spinning forming die and forming method for tapered rotating body component with external ribs |
| CN118371612B (en) * | 2024-06-20 | 2024-08-30 | 太原科技大学 | Thick-wall metal gas cylinder single-ring roller necking spinning machine and spinning method |
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