CN116765225A - Spinning forming processing method and system for curved-surface high-temperature alloy sheet metal part - Google Patents
Spinning forming processing method and system for curved-surface high-temperature alloy sheet metal part Download PDFInfo
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- 238000009987 spinning Methods 0.000 title claims abstract description 108
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 31
- 239000002184 metal Substances 0.000 title claims abstract description 31
- 239000000956 alloy Substances 0.000 title claims abstract description 23
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 20
- 238000003672 processing method Methods 0.000 title claims abstract description 11
- 238000012545 processing Methods 0.000 claims abstract description 59
- 239000000463 material Substances 0.000 claims abstract description 51
- 238000000034 method Methods 0.000 claims abstract description 30
- 230000009467 reduction Effects 0.000 claims description 22
- 238000010008 shearing Methods 0.000 claims description 15
- 238000004364 calculation method Methods 0.000 claims description 14
- 229910000601 superalloy Inorganic materials 0.000 claims description 10
- 230000007423 decrease Effects 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 7
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- 238000003466 welding Methods 0.000 abstract description 13
- 230000008569 process Effects 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000004458 analytical method Methods 0.000 description 5
- 238000005461 lubrication Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 4
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 239000010705 motor oil Substances 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
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- 230000009471 action Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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- 230000006872 improvement Effects 0.000 description 1
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- 238000003754 machining 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
- B21D22/20—Deep-drawing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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Abstract
The invention discloses a spin forming processing method and a spin forming processing system for curved-surface high-temperature alloy sheet metal parts, wherein the spin forming processing method comprises the following steps: calculating the limit thinning rate of a workpiece to be processed and the limit thinning rate of a workpiece material; judging whether the workpiece can be subjected to spinning processing according to the limiting thinning rate of the workpiece and the limiting thinning rate of the workpiece material, and if so, calculating the wall thickness range of the blank required by the workpiece to be processed; and selecting a corresponding woolen material to start spinning forming processing according to the wall thickness range. The method disclosed by the invention can be used for directly processing the flat high-temperature alloy blank into a curved surface part, eliminating a shell welding line, and has the advantages of good quality of the processed part and high surface smoothness.
Description
Technical Field
The invention belongs to the technical field of spinning forming processing, and relates to a spinning forming processing method and system for curved-surface high-temperature alloy sheet metal parts.
Background
With the rapid development of equipment manufacturing technology, high-temperature alloy thin-wall sheet metal parts with the minimum wall thickness of about 0.4mm are widely applied to mechanical equipment. Such light, thin-walled components have high dimensional accuracy requirements but are difficult to process. In addition, in order to meet the requirements of efficient production, the products need to be rapidly produced and rapidly formed after the design is mature, and the manufacturing departments need to develop rapid response manufacturing technologies. Shortens the development and production period and reduces the manufacturing cost.
The curved sheet metal part high-temperature alloy sheet metal part is a thin-wall conical part with a constantly changing half cone angle, and is widely applied to various mechanical mechanisms. The high-temperature alloy material has high yield strength and high processing resistance, is very easy to rebound in the forming process, and belongs to a material difficult to process. At present, the parts are mainly processed by adopting metal plate welding forming and drop forming, and the metal plate welding forming has the defects of high welding deformation control difficulty, low welding qualification rate, low material utilization rate and long processing period. The falling pressure forming process has the problems of overlarge stretching depth, easy tearing, low forming precision and easy rebound.
Disclosure of Invention
The invention aims to solve the problems of high welding deformation control difficulty, low welding qualification rate and low material utilization rate of a high-temperature alloy material in the prior art, and provides a spinning forming processing method and system of a curved-surface high-temperature alloy sheet metal part.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
a spin forming processing method of a curved surface high temperature alloy sheet metal part comprises the following steps:
s1: calculating the limit thinning rate of a workpiece to be processed and the limit thinning rate of a workpiece material;
s2: judging whether the workpiece can be subjected to spinning processing according to the limiting thinning rate of the workpiece and the limiting thinning rate of the workpiece material, if so, executing S3, and if not, carrying out spinning processing;
s3: calculating the wall thickness range of the woolen required by the workpiece to be processed;
s4: and selecting a corresponding woolen material to start spinning forming processing according to the wall thickness range.
The invention further improves that:
the step S1 includes the steps of:
calculating the wall thickness reduction rate of the workpiece;
calculating the thickness of the shearing spinning plate blank based on a sine rule, and obtaining a half cone angle of a workpiece;
and calculating the relation between the half cone angle of the workpiece and the wall thickness reduction rate, and obtaining the limit reduction rate of the part.
The wall thickness reduction rate of the workpiece is calculated by the formula (1):
wherein, ψ is t Representing the wall thickness reduction rate; t is t 0 Representing the wall thickness before spinning; t represents the wall thickness after spinning.
Calculating the thickness of the shear spinning plate blank through a formula (2):
wherein t is 0 Wall thickness before spinning; t represents the wall thickness after spinning; alpha represents the workpiece half cone angle.
The relationship between the half cone angle of the workpiece and the wall thickness reduction rate is calculated by the formula (3):
the method for calculating the limiting thinning rate of the workpiece material comprises the following steps:
the geometrical characteristic that the tangential slope of each point on the ellipsoidal surface gradually decreases along the axial direction is utilized to establish an ellipsoidal core mold, the tangential slope is the sine angle of shearing spinning, and the shearing spinning theoretical wall thickness of each point on the molded surface gradually decreases with the increase of the spinning depth to be 0 at the minimum;
when the ellipsoid is cut and spun, the wall thickness of the test piece is gradually reduced, and finally the fracture occurs, the wall thickness of the fracture is measured, and the ultimate thinning rate of the material is calculated.
In the step S2, when the limiting thinning rate of the workpiece material is greater than the limiting thinning rate of the workpiece, the workpiece meets the requirement of spinning processing.
In the step S3, calculating the wall thickness range of the woolen required by the workpiece to be processed includes the following steps:
t 0min ＝t min /Sinα min (4)
t 0max ＝t max /Sinα max (5)
wherein t is 0min Representing a minimum thickness of the required blank; t is t 0max Representing the maximum thickness of the required blank; alpha min Representing the minimum half cone angle of the part; alpha max Representing the maximum half cone angle of the part; t is t min Minimum wall thickness of the part; t is t max Maximum wall thickness of the part.
In the step S4, the rough material is processed through the roller, and the arc R of the roller is 2-4 times of the wall thickness of the processed part.
A spin forming processing system of a curved surface high-temperature alloy sheet metal part comprises a limit thinning rate calculation module, a spin processing judging module, a blank wall thickness calculation module and a processing module;
the limit thinning rate calculation module is used for calculating the limit thinning rate of the workpiece to be processed and the limit thinning rate of the workpiece material;
the spinning processing judging module is used for judging whether the workpiece can be subjected to spinning processing according to the limiting thinning rate of the workpiece and the limiting thinning rate of the workpiece material, and if so, executing the woolen wall thickness calculating module;
the woolen wall thickness calculating module is used for calculating the wall thickness range of the woolen required by the workpiece to be processed;
and the processing module is used for selecting the corresponding woolen material to start spinning forming processing according to the wall thickness range.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a spinning forming processing method of a curved surface high-temperature alloy sheet metal part, which is characterized in that the limiting thinning rate of a workpiece and the limiting thinning rate of a workpiece material are calculated, then whether the workpiece can be processed by spinning forming is determined, blanks with reasonable thickness can be customized according to the acquired limiting thinning rate of the workpiece and the limiting thinning rate of the workpiece material, unnecessary rejection rate generated by trial processing is reduced, production cost is reduced, the processing period can be shortened through theoretical analysis of workpiece data in the early stage, the processing efficiency is improved, the material deformation can be effectively controlled in the processing process by the processing method, and the flat high-temperature alloy blank can be directly processed into the curved surface part through the early stage calculation of the method disclosed by the invention when the processing of spinning forming is ensured, the shell welding seam is eliminated, the quality of the processed part is good, and the smoothness of the surface is high.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a shear spinning spinnability test of the present invention;
FIG. 2 is a schematic view of a shear spinning process according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a machined part in an embodiment of the present invention.
Wherein: 1-a circular tool tail top; 2-a round blank; 3-semi-cone roller; 4-spinning the mould; 5-a main shaft of the machine tool.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "upper," "lower," "horizontal," "inner," and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the term "horizontal" if present does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The invention is described in further detail below with reference to the attached drawing figures:
referring to fig. 1, the embodiment of the invention discloses a spinning forming processing method of a curved-surface high-temperature alloy sheet metal part, which is used for calculating the size of a blank and a mode of adopting spinning forming by theoretical calculation and analysis. And calculating the ultimate thinning rate of the material through an ellipsoid test. Finally, the final part is processed by spin forming, which comprises the following steps:
step 1, spinning mode analysis:
if the high-temperature alloy curved-surface sheet metal part is subjected to spinning forming, the high-temperature alloy curved-surface sheet metal part can be formed by adopting one-time processing of powerful spinning or adopting ordinary spinning multipass processing, but the spinning forming resilience of the high-temperature alloy material is far greater than that of common materials such as steel, aluminum and the like. The blank is easy to rebound in ordinary spinning at normal temperature, and if the blank rebound is not well controlled, the blank is easy to be unstable, and the problems of wrinkling, cracking and the like are caused. Heating is needed to reduce the yield strength of the material to avoid spinning rebound of the superalloy, and the heating can cause the problems of overburning of the plate, heating expansion of the die, overheating of the main shaft of the equipment and the like. The ideal forming process is that the direct shear spinning processing is completed, but the forming mode of the shear spinning and the size structure of the workpiece have strict limit ranges, and whether the forming can be directly related to the half cone angle of the workpiece and the limiting thinning rate of the blank material or not.
Step 2: calculating the limit thinning rate:
the rate of material thinning is an important process parameter in the deformation zone because it directly determines whether the part can be shear spun. The wall thickness reduction ratio ψt of a shear spinning workpiece is:
wherein, ψ is t Representing the wall thickness reduction rate; t is t 0 Representing the wall thickness before spinning; t represents that the thickness of the wall after spinning, the thickness of the shearing spinning plate blank completely follows the sine rule:
wherein t is 0 Wall thickness before spinning; t represents the wall thickness after spinning; alpha represents the half cone angle of the workpiece;
wall thickness reduction ratio ψ t And the half cone angle alpha of the workpiece is as follows:
the maximum limiting thinning rate of the minimum position of the upper half cone angle of the arc of the part can be obtained through analysis, and the limiting thinning rate of the machined part can be calculated through the formulas (1) - (3).
Whether the ultimate reduction rate of the material exceeds the ultimate reduction rate of the processed part is a key for determining whether the part can be directly formed by adopting shear spinning.
Step 3, calculating the material limit thinning rate:
in order to calculate the ultimate reduction rate of the material, a method for calculating the ultimate reduction rate of the material by using an ellipsoidal core mold is designed, and the schematic diagram of the method is shown in fig. 1.
The method is mainly established by utilizing the geometric characteristic that the tangential slope of each point on the ellipsoidal surface gradually decreases along the axial direction, and the tangential slope is the sine angle of the shear spinning, so that the shear spinning theoretical wall thickness of each point on the molded surface gradually decreases with the increase of the spinning depth, and the minimum is 0. Therefore, when the ellipsoidal surface is subjected to shear spinning, the wall thickness of the test piece is gradually reduced and is always broken, and then the wall thickness at the broken part is measured, so that the limit wall thickness reduction rate of the shear spinning can be calculated.
From this, the shear spinning limiting thinning rate and the minimum half cone angle allowed by the shear spinning can be calculated.
Step 4, determining a spinning mode:
after the maximum thinning rate and the material limiting thinning rate of the part are calculated, whether the processing object can meet the requirement of direct shearing and spinning processing can be analyzed.
Step 5, determining the size of the woolen:
experiments show that the diameter of the shearing spinning blank is unchanged in the machining process, so that the diameter of the blank is consistent with that of a part.
The wall thickness of the shearing spinning completely follows the sine rule, and the wall thickness of the part in the processing can be gradually increased along with the gradual decrease of the half cone angle. According to the relation (formula 2) between the shearing spinning blank and the wall thickness of the part and the relation (formula 3) between the half cone angle and the thinning rate, the wall thickness range of the blank required by processing the inner support section can be calculated, and the calculation result is as follows:
t 0min ＝t min /Sinα min (4)
t 0max ＝t max /Sinα max (5)
wherein:
t 0min representing a minimum thickness of the required blank; t is t 0max Representing the maximum thickness of the required blank; alpha min Representing the minimum half cone angle of the part; alpha max Representing the maximum half cone angle of the part; t is t min Minimum wall thickness of the part; t is t max Maximum wall thickness of part
According to the calculated thickness of the blank at t 0min ～t 0max And the thickness of the workpiece after spinning is qualified and the thickness of the purchased woolen can be selected in the interval.
Step 6, clamping parts:
and clamping the spinning die on a main shaft of a machine tool, and tightly pushing the part by using the tail jack.
Step 7, roller and die clearance:
the wall thickness is strictly adhered to the sine rule in the shearing spinning process, the wall thickness is calculated according to the sine value of the plate in the theoretical state, but in actual processing, the fact that the die and the roller including equipment are elastically deformed in the spinning process is found, the die can rapidly generate heat in the shearing spinning process, the die expands after the heat generation to change the value, and the rebound quantity between the die and the roller needs to be increased by-20% through repeated experiments.
Step 8, part lubrication:
in the spinning process, the material on the contact surface between the workpiece and the spinning roller and the mandrel flows under the action of high pressure, and adhesion is easy to occur without increasing lubrication, so that sufficient lubrication is required in the spinning process.
In general, when materials such as cold spinning aluminum alloy or low carbon steel are used, because deformation heat is not large, engine oil is generally used for lubrication, but in the strong spinning forming process, the local deformation and deformation of the materials are quite large, and friction on the contact surface of a workpiece, a spinning roller and a core mold is quite serious, so that a large amount of heat is inevitably generated in the spinning process, the engine oil is easy to volatilize, and therefore, a solid lubricant molybdenum disulfide should be used in the shearing spinning process.
Step 9, roller arc:
through multiple tests, the circular arc R of the sheet material shearing spinning roller is 2-4 times of the wall thickness of a machined part, and the roller with the round angle is not easy to crack when the part is machined, so that the surface smoothness is high.
Step 10, part processing:
and starting the equipment, and spinning the blank along the die surface by the roller, so that the part is finished in one step.
Step 11, disassembling parts:
after the part is processed on the die, the tail top is retracted, the part is taken down, and molybdenum disulfide remained on the workpiece is cleaned.
And (3) when the parts are required to be replaced, repeating the steps (6) to (11), and when the parts with the same type of structure are replaced, repeating the steps (1) to (11).
Referring to fig. 2 to 3, according to the method of the embodiment of the invention, a spin forming processing process of a curved-surface superalloy sheet metal part is disclosed:
the novel spinning die comprises a circular tool tail top 1, one end of the circular tool tail top 1 is connected with a machine tool tail top, the other end of the circular tool tail top is tightly pressed against a circular blank 2, tail top materials ZG45, a semi-cone roller 3 is processed along the circular blank 2, a spinning die 4 is sleeved on a machine tool spindle 5, the molded surface of the spinning die 4 is identical to a processed part, a die material ZG45 is used, the roller needs to roll the circular blank 2 in the forming process to be completely attached to the spinning die 4, so that the requirements on the finish degree and the molded surface integrity of the spinning die 4 are very high, the finish degree is not lower than Ra1.6, and the molded surface is not allowed to have air holes, sand holes, cutter connection and the like.
The method comprises the following specific steps:
step 1:
according to the structure of the part, see figure 2, the molded surface is divided into three sections, namely a straight cone section with a half cone angle of 30 degrees, a circular arc section with a radius of R100mm and a straight cone section with a half cone angle of 47 degrees. The small end half cone angle of the part is 30 degrees, and the half cone angle gradually increases along the generatrix of the part to the maximum of 47 degrees.
Step 2:
as can be seen from the above formula (3), the material thinning rate at the minimum half cone angle position is the maximum:
the maximum thinning rate of the part is calculated to be 0.5.
Step 3:
and an ellipsoidal test is adopted, so that the limiting thinning rate of the part material GH4648 is calculated to be 0.63.
Step 4:
and (3) determining a spinning mode: the limiting thinning rate of the part material is 0.63, and the limiting thinning rate of the part is 0.5, thereby meeting the requirements of direct shear spinning processing.
Step 5:
according to the drawing requirements, the maximum wall thickness of the part is 1.35mm, the minimum wall thickness is 0.86mm, and the thickness of the blank is calculated:
according to the calculated thickness of the blank between 1.72 mm and 1.84mm, the wall thickness of the workpiece after spinning is qualified, so that the wall thickness of the blank is selected to be 1.8mm.
Step 6:
the spinning die is clamped on a main shaft of a machine tool, the tail jack is used for jacking the part, and the excircle Zhou Tiaodong of the die is found within 0.02 mm.
Step 7:
the calculated clearance between the roller and the die is 0.9-1.3 mm, the rebound clearance is increased by-20%, and the final clearance is set to be 0.72-1.04 mm.
Step 8:
part lubrication: and uniformly coating molybdenum disulfide on the surface of the blank.
Step 9:
roller arc: the thickness of the processed blank is 1.8mm, the arc of the roller is 2-4 times of the thickness of the woolen, the arc of the roller is 3.6-7.2 mm, and finally the arc is R4mm.
Step 10:
and (3) processing parts: and starting the equipment, and spinning the blank along the die surface by the roller, so that the part is finished in one step.
Step 11:
disassembling parts: after the part is processed on the die, the tail top is retracted, the part is taken down, and molybdenum disulfide remained on the workpiece is cleaned.
And (3) when the parts are required to be replaced, repeating the steps (6) to (11), and when the parts with the same type of structure are replaced, repeating the steps (1) to (11).
According to the invention, through a mode of theoretical calculation and clear spinning processing, unreasonable design of a tool and unreasonable custom thickness or diameter of a blank can be avoided, unnecessary waste products generated by trial processing are reduced, and the production cost is greatly reduced. Theoretical analysis and calculation can also shorten the production processing period and avoid the process arrangement from going a curved path.
The high-temperature alloy sheet metal part is processed by spin forming, and the flat high-temperature alloy blank can be directly processed into a curved surface part, so that a shell welding seam is eliminated. The quality of the processed part is excellent, the surface finish of the part can reach more than Ra1.6, the diameter size and profile accuracy are both ensured to be within 0.5mm, the wall thickness accuracy is controlled to be within 0.05mm, and the processing quality of the workpiece is far superior to that of a metal plate welding formed part. The processing efficiency is extremely high, each part is processed by adopting a metal plate welding forming process for at least 3-5 days, and after the technology is adopted, the processing time is shortened to be within 5 minutes, and the processing efficiency is improved by more than 99 percent. The number of the tool requirements is obviously reduced, only one set of spinning die is needed, and compared with the plate welding forming process, the welding fixture, the heat treatment fixture, the forming die and the lathe fixture are reduced, and the tool requirements are reduced by 75%.
The embodiment of the invention also discloses a spinning forming processing system of the curved surface high-temperature alloy sheet metal part, which comprises a limit thinning rate calculation module, a spinning processing judgment module, a blank wall thickness calculation module and a processing module;
the limit thinning rate calculation module is used for calculating the limit thinning rate of the workpiece to be processed and the limit thinning rate of the workpiece material;
the spinning processing judging module is used for judging whether the workpiece can be subjected to spinning processing according to the limiting thinning rate of the workpiece and the limiting thinning rate of the workpiece material, and if so, executing the woolen wall thickness calculating module;
the woolen wall thickness calculating module is used for calculating the wall thickness range of the woolen required by the workpiece to be processed;
and the processing module is used for selecting the corresponding woolen material to start spinning forming processing according to the wall thickness range.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. 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 (10)
1. The spinning forming processing method of the curved-surface high-temperature alloy sheet metal part is characterized by comprising the following steps of:
s1: calculating the limit thinning rate of a workpiece to be processed and the limit thinning rate of a workpiece material;
s2: judging whether the workpiece can be subjected to spinning processing according to the limiting thinning rate of the workpiece and the limiting thinning rate of the workpiece material, if so, executing S3, and if not, carrying out spinning processing;
s3: calculating the wall thickness range of the woolen required by the workpiece to be processed;
s4: and selecting a corresponding woolen material to start spinning forming processing according to the wall thickness range.
2. The method for spin forming a curved-surface superalloy sheet metal part according to claim 1, wherein the step S1 includes the steps of:
calculating the wall thickness reduction rate of the workpiece;
calculating the thickness of the shearing spinning plate blank based on a sine rule, and obtaining a half cone angle of a workpiece;
and calculating the relation between the half cone angle of the workpiece and the wall thickness reduction rate, and obtaining the limit reduction rate of the part.
3. The spin forming method of a curved-surface superalloy sheet metal part according to claim 2, wherein the wall thickness reduction rate of the workpiece is calculated by the formula (1):
wherein, ψ is t Representing the wall thickness reduction rate; t is t 0 Representing the wall thickness before spinning; t represents the wall thickness after spinning.
4. The spin-forming method of a curved superalloy sheet metal part according to claim 3, wherein the thickness of the shear spun slab is calculated by equation (2):
wherein t is 0 Wall thickness before spinning; t represents the wall thickness after spinning; alpha represents the workpiece half cone angle.
5. The spin forming method of curved-surface superalloy sheet metal parts according to claim 4, wherein the relation between the half cone angle of the workpiece and the wall thickness reduction ratio is calculated by the formula (3):
6. the method for spin forming a curved-surface superalloy sheet metal part according to claim 1, wherein the method for calculating the limiting thinning rate of the workpiece material comprises:
the geometrical characteristic that the tangential slope of each point on the ellipsoidal surface gradually decreases along the axial direction is utilized to establish an ellipsoidal core mold, the tangential slope is the sine angle of shearing spinning, and the shearing spinning theoretical wall thickness of each point on the molded surface gradually decreases with the increase of the spinning depth to be 0 at the minimum;
when the ellipsoid is cut and spun, the wall thickness of the test piece is gradually reduced, and finally the fracture occurs, the wall thickness of the fracture is measured, and the ultimate thinning rate of the material is calculated.
7. The method for spin forming a curved-surface superalloy sheet metal part according to claim 1, wherein in step S2, the workpiece meets the requirement of spin forming when the limiting reduction rate of the workpiece material is greater than the limiting reduction rate of the workpiece.
8. The method for spin forming a curved-surface superalloy sheet metal part according to claim 1, wherein in the step S3, calculating the wall thickness range of the blank required for the workpiece to be processed includes the steps of:
t 0min ＝t min /Sinα min (4)
t 0max ＝t max /Sinα max (5)
wherein t is 0min Representing a minimum thickness of the required blank; t is t 0max Representing the maximum thickness of the required blank; alpha min Representing the minimum half cone angle of the part; alpha max Representing the maximum half cone angle of the part; t is t min Minimum wall thickness of the part; t is t max Maximum wall thickness of the part.
9. The method for spin forming of a curved-surface superalloy sheet metal part according to claim 1, wherein in the step S4, the rough material is processed by a roller, and the arc R of the roller is 2-4 times of the wall thickness of the processed part.
10. The spinning forming processing system of the curved-surface high-temperature alloy sheet metal part according to claim 1, which is characterized by comprising a limit thinning rate calculation module, a spinning processing judgment module, a woolen wall thickness calculation module and a processing module;
the limit thinning rate calculation module is used for calculating the limit thinning rate of the workpiece to be processed and the limit thinning rate of the workpiece material;
the spinning processing judging module is used for judging whether the workpiece can be subjected to spinning processing according to the limiting thinning rate of the workpiece and the limiting thinning rate of the workpiece material, and if so, executing the woolen wall thickness calculating module;
the woolen wall thickness calculating module is used for calculating the wall thickness range of the woolen required by the workpiece to be processed;
and the processing module is used for selecting the corresponding woolen material to start spinning forming processing according to the wall thickness range.
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| CN202310943040.9A CN116765225A (en) | 2023-07-28 | 2023-07-28 | Spinning forming processing method and system for curved-surface high-temperature alloy sheet metal part |
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| CN202310943040.9A CN116765225A (en) | 2023-07-28 | 2023-07-28 | Spinning forming processing method and system for curved-surface high-temperature alloy sheet metal part |
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