CN114147117B - Method for forming high-strength thin-wall cylindrical part by heat-assisted multi-roller spinning - Google Patents
Method for forming high-strength thin-wall cylindrical part by heat-assisted multi-roller spinning Download PDFInfo
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- CN114147117B CN114147117B CN202111514518.3A CN202111514518A CN114147117B CN 114147117 B CN114147117 B CN 114147117B CN 202111514518 A CN202111514518 A CN 202111514518A CN 114147117 B CN114147117 B CN 114147117B
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- 238000009987 spinning Methods 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000010008 shearing Methods 0.000 claims abstract description 83
- 230000008569 process Effects 0.000 claims abstract description 19
- 239000007921 spray Substances 0.000 claims description 11
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 20
- 239000011159 matrix material Substances 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 229910000861 Mg alloy Inorganic materials 0.000 abstract description 3
- 229910001069 Ti alloy Inorganic materials 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract 1
- 238000005520 cutting process Methods 0.000 description 6
- 238000007514 turning Methods 0.000 description 6
- 230000002457 bidirectional effect Effects 0.000 description 3
- 238000005242 forging Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012546 transfer Methods 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
Abstract
The invention belongs to the technical field of metal plastic processing, and discloses a method for forming a high-rib thin-wall cylindrical part by adopting a heat-assisted multi-roller spinning method, which is based on a hot roller forming process of the cylindrical part, and firstly adopts a flow roller to perform sectional thinning on a cylindrical part blank; and then, local shear deformation is applied to the pile-up part of the cylindrical part blank by adopting a shear spinning wheel to realize material separation, and radial constraint is applied to the cylindrical part blank by a flow spinning wheel which is axially fed synchronously with the shear spinning wheel until the high-strength thin-wall cylindrical part is formed. According to the invention, through effectively combining the heat-assisted flow spinning and the shearing forming, the problem that the high-strength structure and the cylindrical part matrix are difficult to integrally form (particularly, materials with poor room-temperature plastic deformation capability such as magnesium alloy and titanium alloy) is solved, the outer-strength structure in the shearing forming process is improved, the utilization rate of the materials is greatly improved, the progress of high-performance accurate forming and manufacturing of complex components is facilitated, and the requirement of aerospace carrying equipment on advanced forming and manufacturing technology is met.
Description
Technical Field
The invention belongs to the technical field of metal plastic processing, and particularly relates to a method for forming a high-strength thin-wall cylindrical part by spinning with a plurality of spinning rollers in a heat-assisted manner.
Background
The high-strength thin-wall cylindrical part is widely applied to the fields of aviation, aerospace and the like due to the characteristics of integration, light weight, high performance and the like. In recent years, students at home and abroad successfully realize plastic forming of the rib structure through innovative reform, improve the connection precision of the matrix and the rib structure, and ensure the reliability of the formed high-rib thin-wall cylindrical part structure.
At present, the plastic forming modes suitable for the high-strength thin-wall cylindrical part mainly comprise: forging forming and envelope forming.
1. Forging and forming: in the chinese patent application document with application publication number CN 113020516A, a forging method and a die for a metal piece plate with flange structure and different thickness are disclosed: 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 drawing process and the shearing and extruding action of the male die, and realizes the integrated forming of the high-strength thin-wall cylindrical part. But the process requires high equipment and blank thickness.
2. Envelope forming: in the Chinese patent application document with the application publication number of CN 110918843A, a space enveloping forming manufacturing method of a thin-wall high-strength radiating member is disclosed: the envelope mould performs space envelope movement, and under the combined action of the constraint mould, continuous incremental plastic deformation occurs, so that the coordinated deformation of the thin-wall plate and the rib materials is realized. However, the envelope forming has higher requirements on the die, and the high-strength thin-wall cylindrical part is greatly limited in the aspect of upsetting extrusion forming due to the structural characteristics of the high-strength thin-wall cylindrical part.
In summary, the process for forming the high-strength thin-wall cylindrical part in the prior art has certain limitation because the dependence of the component size on the die cannot be eliminated, and the quality of the integrally formed component of the cylindrical part matrix and the high-strength structure cannot be ensured.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a method for forming a high-strength thin-wall cylindrical part by using a heat-assisted multi-roller spinning method, so that the purposes of high-strength and low-plastic deformation capacity materials at room temperature and high-quality integrated forming of a high-strength structure and a thin-wall cylindrical part matrix can be realized.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a method for forming a high-strength thin-wall cylindrical part by using a heat-assisted multi-roller spinning method is based on a hot-roller forming process of the cylindrical part, and firstly, a flow roller is adopted to thin a cylindrical part blank in a sectional manner; and secondly, applying local shear deformation to the pile-up part of the cylindrical part blank by adopting a shear spinning wheel, and simultaneously controlling the synchronous axial feeding of the flow spinning wheel and the shear spinning wheel to apply radial constraint to the cylindrical part blank until the high-strength thin-wall cylindrical part is formed.
As a limitation of the present invention, the shearing spinning wheel comprises an upper shearing working surface and a lower shearing working surface with an included angle of 90 degrees, and 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 flow turning wheel includes a first chamfer surface and a second chamfer surface that are transitionally connected by a circular arc working surface, and the chamfer surface is transitionally connected with the flow turning wheel side working surface by an exit angle.
As a still further definition of the invention, based on the hot spin forming process of the tubular element, a counter-spin mode is adopted, comprising the steps of:
s1, preparing a cylindrical blank, namely machining the end face of an original cylindrical part to prepare a cylindrical part blank with a gear tooth shape at one end;
s2, mounting a die: clamping a cylindrical part blank to a mandrel of a numerical control spinning machine in a concave-convex matching mode; then, the shearing spinning wheel and the flowing spinning wheel are assembled on a spinning frame of the numerical control spinning machine; finally, assembling a flame spray gun on the numerical control spinning machine, and enabling a nozzle of the flame spray gun to correspond to the plastic deformation area of the cylindrical part blank;
s3, heat assisted flow forming: after the numerical control spinning machine is started and parameter setting is carried out, firstly, the cylindrical part blank is driven by a mandrel to rotate and move, and meanwhile, a flame spray gun is utilized to heat a plastic deformation area of the cylindrical part blank; then controlling the flow rotary wheel to thin the cylindrical part blank in a sectional manner to prepare a stepped cylindrical part;
s4, shearing and forming: the shearing rotary wheel is adjusted to enable the arc working surface of the shearing rotary wheel to be positioned at the step of the cylindrical part,simultaneously, the flow rotary wheel is adjusted to enable the convex arc shearing angle to be contacted with the surface of the unrefined section; continuing the rotation state of the cylindrical part blank in the step S3, and controlling the shearing rotating wheel and the flowing rotating wheel to synchronize the speedsvPerforming stage axial feeding movement, and performing sectional shearing forming on the cylindrical part until the high-strength thin-wall cylindrical part is prepared;
s5, unloading operation: and (3) radially withdrawing the shearing spinning wheel and the flowing spinning wheel, and demoulding and taking the formed high-strength thin-wall cylindrical part from the mandrel after carrying out the unloading operation of the spinning wheel.
As a further limitation of the invention, the mandrel assembled on the spindle of the numerical control spinning machine in the method comprises a mandrel body and a mandrel base which are coaxially arranged, wherein one end of the mandrel base, which is close to the assembling surface of the mandrel body, is fixedly provided with a positioning step;
and a plurality of grooves are uniformly formed in the end face of the positioning step.
As a further limitation of the invention, the shearing rotating wheels and the flowing rotating wheels in the method have the same quantity1～3And each.
On the basis of heat-assisted spinning forming, the invention realizes the effective combination of flow spinning and shearing forming, namely, the integrated forming of the high-rib structure and the thin-wall cylindrical part matrix is finally realized by combining the forming modes of different characteristic spinning wheels. By adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
firstly, the external heating field effectively improves the plasticity of the material in the forming process, and can solve the problem that the integral forming of the high-rib structure and the cylindrical part matrix is difficult due to the adoption of the material with high strength and poor plastic deformation capacity at room temperature;
the second shearing rotary wheel comprises an upper shearing working surface and a lower shearing working surface which can separate shearing angles of materials and assist radial transfer of the materials, and the upper shearing working surface and the lower shearing working surface can assist radial flow control of the materials (forming a high-rib structure) and axial flow control of the materials (forming a thin-wall cylindrical part matrix) respectively when the shearing angles are utilized to shear and separate the cylindrical part blanks;
thirdly, the cylindrical part blank is thinned in a sectional mode by utilizing the flow rotary wheel, so that the cylindrical part thinning and material stacking can be realized primarily, the rigidity of the rib part structure can be ensured in the shearing forming process, and the connection strength of the rib part structure and the cylindrical part base body part is effectively increased;
fourthly, in the shearing forming, the arc working surface of the flow rotary wheel is vertically contacted with the surface of the cylindrical part blank and synchronously axially fed with the shearing rotary wheel, so that on one hand, the rigidity of the cylindrical part blank can be ensured, and the occurrence of wrinkling and instability of the cylindrical part blank is prevented; on the other hand, the second chamfer surface of the flow rotary wheel is matched with the upper shearing working surface of the shearing rotary wheel, so that the extrusion and the correction of the shearing formed outer rib can be realized, the back sliding structure of the outer rib can be eliminated, the wall thickness distribution of the rib part is more uniform, and the warping of the outer rib in the forming process is avoided;
fifthly, the movable rotary wheel is utilized to replace the traditional die, the current situation that the formation of structural members is generally limited to a constraint die in the traditional process is eliminated, and high-strength thin-wall cylindrical parts with different shape characteristics can be formed only by controlling the movement track of the shearing rotary wheel and the relative position of the back pressure die, so that the movable rotary wheel has strong universality and functionality.
In summary, the invention realizes the effective combination of the thermal rotational flow dynamic forming and the shearing forming, solves the problem of the integral forming difficulty of the high-rib structure and the cylindrical part matrix (especially the material with poor plastic deformation capability under the room temperature condition such as magnesium alloy, titanium alloy and the like), greatly improves the utilization rate of the material, is beneficial to promoting the progress of the high-performance accurate forming and manufacturing of complex components and meets the requirement of aerospace carrying equipment on advanced forming and manufacturing technology.
Drawings
The invention will be described in more detail below with reference to the accompanying drawings and specific examples.
FIG. 1 is a schematic illustration of the features of staged reduction of a blank of a tubular member in an embodiment of the present invention;
FIG. 2 is a schematic illustration of flow shear forming features of a barrel blank in accordance with an embodiment of the present invention;
FIG. 3 is a process flow diagram of forming a high-strength thin-walled cylinder in an embodiment of the present invention;
FIG. 4 is a schematic view of a shear spinning wheel according to an embodiment of the present invention; FIG. 4a is a top view of the structural relationship of the shear spinning wheel; FIG. 4b is a cross-sectional view of the structural relationship of the shear rotor;
FIG. 5 is a schematic view of a flow wheel according to an embodiment of the present invention; FIG. 5a is a front view of the structural relationship of the flow spinning wheel; FIG. 5b is a left side view of the structural relationship of the shear rotor;
FIG. 6 is a schematic diagram of a mandrel according to an embodiment of the present invention; wherein, fig. 6a is a front view of the structural relationship of the mandrel; FIG. 6b is a left side view of the structural relationship of the mandrel;
in the figure: 1. a shearing rotary wheel; 2. a flow spinning wheel; 3. a flame spray gun; 4. a mandrel; 5. a cylindrical member blank; 101. a bidirectional countersunk hole; 102. cutting the working surface; 103. cutting the working surface down; 104. convex arc shearing angle; 201. a through hole; 202. a first chamfer surface; 203. a second chamfer surface; 204. a circular arc working surface; 205. a side working surface; 401. a mandrel body; 402. a mandrel base; 403. positioning the step; 404. circular arc recess.
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 method for forming high-strength thin-wall cylindrical part by heat-assisted multi-roller spinning
The embodiment combines the shearing forming process on the basis of the existing hot spinning forming process, utilizes spinning wheel groups with different functions to thin the cylindrical part blank 5 in a segmented mode, and then carries out shearing forming treatment, so that the flow forming of the cylindrical part matrix and the shearing forming of a multi-channel high-rib structure are realized. The method specifically comprises the following steps:
s1, preparing a cylinder blank: the original cylindrical member to be machined is machined, and a plurality of gear tooth structures are uniformly machined on the end portion of the original cylindrical member in the circumferential direction to prepare a cylindrical member blank 5 with a tooth shape at one end. In this embodiment, an original cylindrical member made of a material having poor plastic deformation ability at room temperature such as magnesium alloy or titanium alloy is selected.
S2, mounting a die: after the cylindrical part blank 5 is clamped to the mandrel 4 of the numerical control spinning machine in a concave-convex matching mode, the shearing spinning wheel 1 and the flowing spinning wheel 2 are assembled on a spinning frame of the numerical control spinning machine, and the relative positions of the shearing spinning wheel 1, the flowing spinning wheel 2 and the cylindrical part blank 5 are adjusted. Finally, the flame spray gun 3 is assembled on the numerical control spinning machine, and the nozzle of the flame spray gun 3 corresponds to the plastic deformation area of the barrel blank 5.
As shown in fig. 6a and 6b, the spindle 4 mounted on the spindle of the numerical control spinning machine includes a spindle body 401 and a spindle base 402 coaxially disposed. Wherein, a plurality of threaded holes are uniformly distributed on one side end of the mandrel base 402 along the circumferential direction, and the connection with a machine tool spindle can be realized through bolts; the other side end of the mandrel base 402 is fixedly provided with a positioning step 403, and four circular arc grooves 404 are uniformly formed on the end surface of the positioning step 403 adjacent to the assembling surface of the mandrel body 401. In the forming process, the circular arc-shaped grooves 404 are matched with the protruding structures of the cylindrical part blanks 5, so that the cylindrical part blanks 5 can be guaranteed to circumferentially rotate under the drive of the mandrel 4.
The length and width of the projection structure machined on the cylindrical member blank 5 in step S1 of this embodiment are slightly smaller than the size of the circular arc-shaped groove 404, so that the cylindrical member blank 5 can be attached to and detached from the mandrel 4.
The shearing spinning wheel 1 is mainly used for applying local shearing deformation to the wall thickness plane of the cylindrical part blank 5 so as to enable the materials of the cylindrical part blank 5 to be sheared and separated. As shown in fig. 4a and 4b, the shear spinning wheel 1 is a biconical spinning wheel with a hollow revolution body structure, a plurality of bidirectional countersunk holes 101 are uniformly formed in the normal direction of the biconical spinning wheel, and the bidirectional countersunk holes can be fixedly connected with a spinning wheel frame by using fastening bolts; the circumference of the upper shearing working surface 102 and the lower shearing working surface 103 which are in transitional connection through the convex arc shearing angle 104 are arranged, and the included angle between the upper shearing working surface 102 and the lower shearing working surface 103 is 90 degrees. Wherein, the fillet diameter of the convex arc shear angle 104R=0.1～0.5mm。
The flow rotor 2 is periodically depressed and idle in the axial direction, and has multiple functions of thinning the cylindrical member blank 5 in the flow forming stage and applying radial pressure to the cylindrical member blank 5 in the shear forming stage. As shown in fig. 5a and 5b, the flow spinning wheel 2 is a biconical spinning wheel, and a through hole 201 for connecting a spinning wheel frame is formed in the center of the flow spinning wheel; the circumference of the rotary wheel is provided with a first chamfer surface 202 and a second chamfer surface 203 which are in transitional connection through an arc working surface 204, and the first chamfer surface 202, the second chamfer surface 203 and a side working surface 205 of the rotary wheel 2 are in transitional connection through an exit angle.
The number of the shearing rotating wheels 1 and the number of the flowing rotating wheels 2 on the numerical control spinning machine are the same, and the shearing rotating wheels and the flowing rotating wheels are all1～3And each. In the embodiment, 2 shearing spinning wheels 1 are arranged in total and are symmetrically distributed on a spinning frame of the numerical control spinning machine; the number of the flow rotating wheels 2 is 2, and the flow rotating wheels are respectively in one-to-one correspondence with the shearing rotating wheels 1.
S3, heat assisted flow forming: and starting a numerical control spinning machine, setting the track of the flow spinning wheel 2 through a numerical control system, heating a plastic deformation area of the cylindrical part blank 5 by using the flame spray gun 3, and controlling the flow spinning wheel 2 to thin the cylindrical part blank 5 in a sectional mode.
The method comprises the following steps: first, the position of the spin frame is adjusted by a numerical control spinning machine until the circular arc working surface 204 of the flow spin 2 is in vertical contact with the surface of the cylindrical member blank 5, as shown in fig. 1. Then, a numerical control spinning machine is started, the range of the feed ratio is set to be 0.1-2, a counter-rotating mode is adopted, the cylindrical part blank 5 is driven by the mandrel 4 to circumferentially rotate, and meanwhile, the flame spray gun 3 is utilized to heat the plastic deformation area of the cylindrical part blank 5. After the forming temperature of the material is reached, the flow wheel 2 is controlled to press down radially t and feed axially x along the cylindrical member blank 5 1 Thinning the cylindrical member blank 5; the flow turning wheel 2 is then controlled to move away from the blank 5 of the tubular member, the idle stroke being fed by x 2 The method comprises the steps of carrying out a first treatment on the surface of the The cylindrical member blanks 5 having a stepwise thickness distribution are prepared by periodically loading and unloading three times and twice in the axial direction of the cylindrical member blanks 5 at a constant axial feed speed, as shown in fig. 1.
S4, shearing and forming: and (3) continuing the rotation state of the cylindrical part blank 5 in the step (S3), setting the track of the flow rotary wheel 2 and the track of the shearing rotary wheel 1 through a numerical control system, and controlling the flow rotary wheel 2 and the shearing rotary wheel 1 to shear and shape the cylindrical part blank 5.
Due to the presence of the thinned section of the blank 5, the shear forming can only be started from the side close to the mandrel base 402, in particular: firstly, the position of the rotary wheel frame is adjusted by utilizing a numerical control spinning machine until the arc working surface 204 of the flowing rotary wheel 2 vertically contacts with the surface of the non-thinned section cylindrical part, and the convex arc shearing angle 104 of the shearing rotary wheel 1 contacts with the end surface of the stacking position of the cylindrical part blank 5. Because in this embodiment, two annular external ribs are required to be cut and formed, as shown in fig. 2, the flow turning wheel 2 is vertically contacted with the surface of the pile of the cylindrical part blank 5A in advance, the lower cutting working surface 103 of the cutting turning wheel 1 is contacted with the thinned Duan Pingmian on the right side of the cylindrical part blank 5A, and the convex arc cutting angle 104 of the cutting turning wheel 1 is positioned at the steps of the thinned Duan Pingmian on the right side of the a point and the non-thinned section on the left side of the a point.
Then, the cylindrical member blank 5 is rotated in the continuation step S3 to control the shear rotor 1 and the flow rotor 2 to have a synchronous speedvPerforming axial feed movement, the axial feed distance not being greater than x 2 -0.6t, forming a first annular outer bead.
After the first annular outer rib is formed, the shearing rotary wheel 1 and the flowing rotary wheel 2 are respectively subjected to tool retracting movement to prevent damage to the formed annular outer rib, then tool setting operation is carried out according to the process, the second annular outer rib is sheared and formed at the position where the cylindrical part blank 5B is piled, and the shearing and forming process is the same as that of the first annular outer rib.
S4, unloading operation: after the shearing spinning wheel 1 and the flowing spinning wheel 2 are radially withdrawn, the spinning wheel unloading operation is executed; and then demolding and taking the part, and separating the high-rib thin-wall cylindrical part from the mandrel 4 by adopting a mode of ejection of a hydraulic cylinder of a numerical control spinning machine to finish the unloading operation.
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 (3)
1. A method for forming a high-strength thin-wall cylindrical part by heat-assisted multi-roller spinning is based on a cylindrical part hot-spinning forming process and is characterized in that: firstly, a flow rotary wheel is adopted to thin a cylindrical part blank in a sectional mode; secondly, a shearing spinning wheel is adopted to apply local shearing deformation to the pile-up part of the cylindrical part blank, and simultaneously the synchronous axial feeding of the flowing spinning wheel and the shearing spinning wheel is controlled to apply radial constraint to the cylindrical part blank until the high-strength thin-wall cylindrical part is formed;
the shearing rotary wheel comprises an upper shearing working surface and a lower shearing working surface, the included angle between the upper shearing working surface and the lower shearing working surface is 90 degrees, and the upper shearing working surface and the lower shearing working surface are in transitional connection through an outer convex arc shearing angle; the flow rotary wheel comprises a first chamfer surface and a second chamfer surface which are in transitional connection through an arc working surface, and the chamfer surface is in transitional connection with the working surface of the side of the flow rotary wheel through a withdrawal chamfer;
the method adopts a reverse rotation mode and specifically comprises the following steps:
s1, preparing a cylindrical blank, namely machining the end face of an original cylindrical part to prepare a cylindrical part blank with a gear tooth shape at one end;
s2, mounting a die: clamping a cylindrical part blank to a mandrel of a numerical control spinning machine in a concave-convex matching mode; then, the shearing spinning wheel and the flowing spinning wheel are assembled on a spinning frame of the numerical control spinning machine; finally, assembling a flame spray gun on the numerical control spinning machine, and enabling a nozzle of the flame spray gun to correspond to the plastic deformation area of the cylindrical part blank;
s3, heat assisted flow forming: after the numerical control spinning machine is started and parameter setting is carried out, firstly, the cylindrical part blank is driven by a mandrel to rotate and move, and meanwhile, a flame spray gun is utilized to heat a plastic deformation area of the cylindrical part blank; then controlling the flow rotary wheel to thin the cylindrical part blank in a sectional manner to prepare a stepped cylindrical part;
s4, shearing and forming: adjusting the shearing rotating wheel to enable the convex arc shearing angle of the shearing rotating wheel to be positioned at the step of the cylindrical part, and simultaneously adjusting the flowing rotating wheel to enable the arc working surface of the flowing rotating wheel to be vertically contacted with the surface of the unrefined section; continuing the rotation state of the cylindrical part blank in the step S3, and controlling the shearing rotating wheel and the flowing rotating wheel to synchronize the speedsvPerforming stage axial feeding movement, and performing sectional shearing forming on the cylindrical part until the high-strength thin-wall cylindrical part is prepared;
s5, unloading operation: and (3) radially withdrawing the shearing spinning wheel and the flowing spinning wheel, and demoulding and taking the formed high-strength thin-wall cylindrical part from the mandrel after carrying out the unloading operation of the spinning wheel.
2. The method for forming the high-strength thin-wall cylindrical part by using the heat-assisted multi-roller spinning according to claim 1, which is characterized by comprising the following steps: in the method, a mandrel assembled on a main shaft of a numerical control spinning machine comprises a mandrel body and a mandrel base which are coaxially arranged, wherein a positioning step is fixedly arranged at one end of the mandrel base, which is close to an assembling surface of the mandrel body;
and a plurality of grooves are uniformly formed in the end face of the positioning step.
3. A method for forming a high-rib thin-wall cylindrical part by heat-assisted multi-roller spinning according to claim 1 or 2, which is characterized in that: in the method, the number of the shearing rotating wheels is 1-3, and the number of the shearing rotating wheels is the same as the number of the flowing rotating wheels.
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| CN202111514518.3A CN114147117B (en) | 2021-12-13 | 2021-12-13 | Method for forming high-strength thin-wall cylindrical part by heat-assisted multi-roller spinning |
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| CN202111514518.3A CN114147117B (en) | 2021-12-13 | 2021-12-13 | Method for forming high-strength thin-wall cylindrical part by heat-assisted multi-roller spinning |
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| RU2010138710A (en) * | 2010-09-21 | 2012-03-27 | Федеральное Государственное унитарное предприятие "Государственное научно-производственное предприятие "Сплав" (RU) | METHOD FOR ROTARY EXTRACTION OF THIN-WALLED CASES |
| CN110479841A (en) * | 2019-08-02 | 2019-11-22 | 武汉理工大学 | Manufacturing process is rolled in the large-scale horizontal high multidirectional rotation of muscle thin-walled ring multi-pass |
| 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 |
| CN113617915A (en) * | 2021-07-29 | 2021-11-09 | 西北工业大学 | Local loading integral forming method for special-shaped section rib cylindrical part |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10539337B2 (en) * | 2009-11-24 | 2020-01-21 | Jeffrey Allen Hermanson | Sealed and/or reinforced flanged ring connector for single- and double-wall HVAC ducting |
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- 2021-12-13 CN CN202111514518.3A patent/CN114147117B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2010138710A (en) * | 2010-09-21 | 2012-03-27 | Федеральное Государственное унитарное предприятие "Государственное научно-производственное предприятие "Сплав" (RU) | METHOD FOR ROTARY EXTRACTION OF THIN-WALLED CASES |
| CN110479841A (en) * | 2019-08-02 | 2019-11-22 | 武汉理工大学 | Manufacturing process is rolled in the large-scale horizontal high multidirectional rotation of muscle thin-walled ring multi-pass |
| 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 |
| CN113617915A (en) * | 2021-07-29 | 2021-11-09 | 西北工业大学 | Local loading integral forming method for special-shaped section rib cylindrical part |
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