CN116765225A - Spinning forming processing method and system for curved-surface high-temperature alloy sheet metal part - Google Patents

Abstract

The invention discloses a spin forming processing method and system for curved high-temperature alloy sheet metal parts, which includes the following steps: calculating the limit thinning rate of the workpiece to be processed and the limit thinning rate of the workpiece material; according to the limit thinning rate of the workpiece and the ultimate thinning rate of the workpiece material to determine whether the workpiece can be spun. If so, calculate the wall thickness range of the wool required for the workpiece to be processed; based on the wall thickness range, select the corresponding wool to start spinning. The present invention reduces unnecessary scrap products produced by trial processing and reduces production costs. Through the theoretical analysis of workpiece data in the early stage, the processing cycle can also be shortened and the processing efficiency can be improved. Through the method disclosed in the present invention, the straight high-temperature alloy can be The blank is directly processed into curved parts, and the shell weld is eliminated. The quality of the processed parts is good and the surface finish is high.

Description

A spin forming processing method and system for curved high-temperature alloy sheet metal parts

Technical field

The invention belongs to the technical field of spin forming processing, and relates to a spin forming processing method and system for curved high-temperature alloy sheet metal parts.

Background technique

With the rapid development of equipment manufacturing technology, high-temperature alloy thin-walled sheet metal parts with a minimum wall thickness of only about 0.4mm are widely used in mechanical equipment. This type of lightweight, thin-walled components has high requirements for dimensional accuracy but is very difficult to process. In addition, in order to meet the requirements for efficient production, it is necessary to quickly produce and form products after the design is mature, and the manufacturing department needs to develop rapid response manufacturing technology. Shorten the development and production cycle and reduce manufacturing costs.

Curved sheet metal parts. High-temperature alloy sheet metal parts are thin-walled tapered parts with continuously changing half-cone angles. They are widely used in various mechanical mechanisms. High-temperature alloy materials have high yield strength, high processing resistance, and are easy to spring back during the forming process, making them difficult-to-process materials. At present, such parts are mainly processed by sheet welding and drop forming. Sheet welding has the disadvantages of difficult welding deformation control, low welding qualification rate, low material utilization rate, and long processing cycle. The drop molding process has problems such as excessive drawing depth, easy tearing, low molding accuracy, and prone to springback.

Contents of the invention

The purpose of the present invention is to solve the problems in the prior art of difficulty in controlling welding deformation of high-temperature alloy materials, low welding qualification rate, and low material utilization rate, and provide a spin forming processing method and system for curved high-temperature alloy sheet metal parts.

In order to achieve the above objectives, the present invention adopts the following technical solutions to achieve:

A spin forming processing method for curved high-temperature alloy sheet metal parts, including the following steps:

S1: Calculate the ultimate thinning rate of the workpiece to be processed and the ultimate thinning rate of the workpiece material;

S2: Determine whether the workpiece can be spun based on the limit thinning rate of the workpiece and the limit thinning rate of the workpiece material. If so, proceed to S3. If not, spinning cannot be performed;

S3: Calculate the wall thickness range of wool required for the workpiece to be processed;

S4: According to the wall thickness range, select the corresponding wool material to start spinning forming processing.

Further improvements of the present invention are:

The step S1 includes the following steps:

Calculate the wall thickness reduction rate of the workpiece;

Calculate the thickness of the shear spinning slab based on the sine law and obtain the half cone angle of the workpiece;

Calculate the relationship between the workpiece half-cone angle and the wall thickness thinning rate to obtain the limit thinning rate of the part.

The wall thickness reduction rate of the workpiece is calculated by formula (1):

In the formula, Ψ _t represents the wall thickness reduction rate; t ⁰ represents the wall thickness before spinning; t represents the wall thickness after spinning.

Calculate the thickness of the shear spinning slab through formula (2):

In the formula, t ⁰ is the wall thickness before spinning; t represents the wall thickness after spinning; α represents the half cone angle of the workpiece.

The relationship between the workpiece half-cone angle and the wall thickness reduction rate is calculated by formula (3):

The calculation method of the ultimate thinning rate of the workpiece material includes:

The ellipsoidal mandrel is established by utilizing the geometric feature that the tangent slope of each point on the ellipsoid surface gradually decreases along the axial direction. The tangent slope is the sine angle of shear spinning. As the spinning depth increases, the shape of each point on the profile increases. The theoretical wall thickness of shear spinning gradually decreases, with a minimum of 0;

When shear spinning along the ellipsoid surface, the wall thickness of the specimen gradually decreases, and finally breaks. The wall thickness at the break is measured and the ultimate thinning rate of the material is calculated.

In step S2, when the limit thinning rate of the workpiece material is greater than the limit thinning rate of the workpiece, the workpiece meets the requirements for spinning processing.

In step S3, calculating the wall thickness range of the wool required for the workpiece to be processed includes the following steps:

t _0min =t _min /Sinα _min (4)

t _0max =t _max /Sinα _max (5)

In the formula, t _0min represents the minimum thickness of the required blank; t _0max represents the maximum thickness of the required blank; α _min represents the minimum half-cone angle of the part; α _max represents the maximum half-cone angle of the part; t _min represents the minimum wall thickness of the part; t _max represents the maximum wall thickness of the part. .

In the step S4, the wool is processed through a roller, and the arc R of the roller is 2-4 times the wall thickness of the processed part.

A spinning forming processing system for curved high-temperature alloy sheet metal parts, including a limit thinning rate calculation module, a spinning processing judgment module, a wool wall thickness calculation module and a processing module;

The ultimate thinning rate calculation module is used to calculate the ultimate thinning rate of the workpiece to be processed and the ultimate thinning rate of the workpiece material;

The spinning process judgment module is used to determine whether the workpiece can be spin-formed based on the limit thinning rate of the workpiece and the limit thinning rate of the workpiece material. If so, execute the wool wall thickness calculation module;

The wool wall thickness calculation module is used to calculate the wall thickness range of wool required for the workpiece to be processed;

The processing module is used to select the corresponding wool material according to the wall thickness range and start spinning forming processing.

Compared with the prior art, the present invention has the following beneficial effects:

The invention discloses a spin forming processing method for curved high-temperature alloy sheet metal parts. By calculating the limit thinning rate of the workpiece and the limit thinning rate of the workpiece material, it is then determined whether the workpiece can be processed by spin forming, and based on The obtained limit thinning rate of the workpiece and the limit thinning rate of the workpiece material can be used to customize blanks with reasonable thickness, reduce unnecessary scrap rates caused by trial processing, and reduce production costs. Through the theoretical analysis of workpiece data in the early stage, It can also shorten the processing cycle and improve the processing efficiency. This processing method can effectively control the material deformation during the processing. Through the preliminary calculation of the method disclosed in the present invention, when ensuring that it can be processed by spinning, the straight high-temperature alloy can be The blank is directly processed into curved surface parts, and the shell weld is eliminated. The quality of the processed parts is good and the surface finish is high.

Description of drawings

In order to explain the technical solutions of the embodiments of the present invention more clearly, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and therefore do not It should be regarded as a limitation of the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic diagram of the shear spinning spinability test of the present invention;

Figure 2 is a schematic structural diagram of shearing and spinning processing in an embodiment of the present invention;

Figure 3 is a schematic structural diagram of a processed part in an embodiment of the present invention.

Among them: 1-round tooling tail top; 2-round blank; 3-semi-conical roller; 4-spinning mold tire; 5-machine tool spindle.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, rather than all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Therefore, the following detailed description of the embodiments of the invention provided in the appended drawings is not intended to limit the scope of the claimed invention, but rather to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

It should be noted that similar reference numerals and letters represent similar items in the following figures, therefore, once an item is defined in one figure, it does not need further definition and explanation in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that if the terms “upper”, “lower”, “horizontal”, “inner”, etc. appear to indicate an orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. , or the orientation or positional relationship in which the product of the invention is usually placed when used, is only for the convenience of describing the invention and simplifying the description, and does not indicate or imply that the device or component referred to must have a specific orientation or be constructed in a specific orientation. and operation, and therefore cannot be construed as limitations of the present invention. In addition, the terms "first", "second", etc. are only used to differentiate descriptions and are not to be understood as indicating or implying relative importance.

In addition, if the term "level" appears, it does not mean that the component is required to be absolutely horizontal, but may be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical". It does not mean that the structure must be completely horizontal, but can be slightly tilted.

In the description of the embodiments of the present invention, it should also be noted that, unless otherwise clearly stated and limited, the terms "setting", "installation", "connecting" and "connecting" should be understood in a broad sense. For example, they can It can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or it can be an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

The present invention will be described in further detail below in conjunction with the accompanying drawings:

Referring to Figure 1, an embodiment of the present invention discloses a spin forming method for curved high-temperature alloy sheet metal parts. Through theoretical calculations, the method of spin forming of the parts and the size of the blank are analyzed and calculated. The ultimate thinning rate of the material is calculated through the ellipsoid test. Finally, the final part is processed by spin forming, which includes the following steps:

Step 1, analysis of spinning method:

If high-temperature alloy curved surface sheet metal parts are to be processed by spin forming, they can be processed by powerful spinning in one pass, or by ordinary spinning in multiple passes. However, the amount of rebound of high-temperature alloy materials during spin forming is much greater than that of common spinning processes. of steel, aluminum and other materials. Springback is easy to occur during ordinary spinning at room temperature. If the rebound of the blank is not controlled well, it can easily lead to instability, wrinkles, cracks and other problems. To avoid high-temperature alloy spinning springback, heating is required to reduce the material yield strength, and heating may cause problems such as overburning of the sheet, heating expansion of the mold, and overheating of the equipment spindle. The ideal molding process is direct shear spinning, but the shear spinning molding method and workpiece size structure have strict limits. The success of molding is directly related to the half cone angle of the workpiece and the ultimate thinning rate of the blank material.

Step 2: Calculation of ultimate thinning rate:

The material thinning rate is an important process parameter in the deformation zone because it directly determines whether the part can be shear-spun. The wall thickness reduction rate Ψt of the shear spinning workpiece is:

In the formula, Ψ _t represents the wall thickness reduction rate; t ⁰ represents the wall thickness before spinning; t represents the wall thickness after spinning. The shear spinning wall thickness completely follows the sinusoidal law, and the shear spinning slab thickness is:

In the formula, t ⁰ is the wall thickness before spinning; t represents the wall thickness after spinning; α represents the half cone angle of the workpiece;

The relationship between the wall thickness reduction rate Ψ _t and the workpiece half-cone angle α is:

After analysis, it can be seen that the limit thinning rate is the largest at the minimum position of the half cone angle on the arc of the part. The limit thinning rate of the processed part can be calculated through formula (1)-formula (3).

Whether the ultimate thinning rate of the material exceeds the ultimate thinning rate of the processed part is the key to determining whether the part can be directly formed by shear spinning.

Step 3, calculation of material ultimate thinning rate:

In order to calculate the ultimate thinning rate of materials, a method using an ellipsoidal mandrel to calculate the ultimate thinning rate of materials was designed. The schematic diagram is shown in Figure 1.

This method is mainly established by using the geometric feature that the tangent slope of each point on the ellipsoid surface gradually decreases along the axial direction. The tangent slope is the sine angle of shear spinning. Therefore, as the spinning depth increases, the profile of each The theoretical wall thickness of the shear spinning point gradually decreases, and the minimum is 0. Therefore, when shear spinning along the ellipsoid surface, the wall thickness of the specimen gradually decreases and it will always break. Then by measuring the wall thickness at the rupture point, the ultimate wall thickness reduction rate of shear spinning can be calculated.

From this, the ultimate thinning rate of shear spinning and the minimum allowed half-cone angle of shear spinning can be calculated.

Step 4, determine the spinning method:

After calculating the maximum thinning rate of the part and the ultimate thinning rate of the material, it can be analyzed whether the processing object can meet the requirements of direct shear spinning processing.

Step 5, determine the wool size:

After experiments, it was found that the diameter of the shear spinning blank does not change during processing, so the diameter of the blank is consistent with the part.

The wall thickness of shear spinning completely follows the sinusoidal law, and the wall thickness of the parts during processing will also gradually increase as the half-cone angle gradually decreases. According to the relationship between the shear spinning blank and the part wall thickness (Formula 2), the relationship between the half taper angle and the thinning rate (Formula 3), the range of blank wall thickness required for processing the inner support section can be calculated. The calculated results are as follows:

t _0min =t _min /Sinα _min (4)

t _0max =t _max /Sinα _max (5)

In the formula:

t _0min represents the minimum thickness of the required blank; t _0max represents the maximum thickness of the required blank; α _min represents the minimum half-cone angle of the part; α _max represents the maximum half-cone angle of the part; t _min represents the minimum wall thickness of the part; t _max represents the maximum wall thickness of the part

According to the calculation, the thickness of the blank is between t _0min ~ t _0max mm, and the wall thickness of the workpiece after spinning is qualified. The thickness of the purchased raw material can be selected within the above range.

Step 6, parts clamping:

Clamp the spinning mold on the machine tool spindle and use the tail jack to tighten the parts.

Step 7, clearance between roller and mold:

During the shear spinning process, the wall thickness dimension strictly follows the sinusoidal law. In theory, it only needs to be calculated according to the sinusoidal value of the sheet. However, in actual processing, it is found that the mold, roller, and equipment all undergo elastic deformation during the shear spinning process. Shearing During the spinning process, the mold will heat up rapidly. After heating, the expansion of the mold will change the value. After repeated tests, -20% springback needs to be added between the mold and the roller.

Step 8, parts lubrication:

During the spinning process, the material on the contact surface between the workpiece, the wheel and the mandrel flows under the action of high pressure. Adhesion can easily occur if lubrication is not added, so sufficient lubrication must be carried out during spinning.

Generally, when cold-spinning materials such as aluminum alloy or low-carbon steel, since the deformation heat generated is not large, engine oil is generally used for lubrication. However, during the strong spinning process, the local deformation and deformation of the material are quite large, and the workpiece and the The friction on the contact surface between the rotating wheel and the mandrel is also very serious, so a large amount of heat is inevitably generated during the spinning process, which easily causes the volatilization of the engine oil. Therefore, the solid lubricant molybdenum disulfide should be used during the shear spinning process.

Step 9, roller arc:

After many tests, the arc R of the thin sheet shear spinning roller is 2 to 4 times the wall thickness of the processed parts. The parts processed by the roller with this rounded angle are not prone to cracks and have a high surface finish.

Step 10, parts processing:

Start the equipment, the rollers spin the blank along the mold surface, and complete the parts one by one.

Step 11, disassemble parts:

After the parts are processed on the mold, return the tail top, remove the parts, and clean the remaining molybdenum disulfide on the workpiece.

When parts need to be replaced, just repeat steps (6) to (11). When replacing similar structural parts, just repeat steps (1) to (11).

Referring to Figures 2 to 3, based on the method of the embodiment of the present invention, the spin forming process of curved high-temperature alloy sheet metal parts is disclosed:

It includes a circular tooling tail top 1, one end of the circular tooling tail top 1 is connected to the machine tool tail top, one end presses the circular blank 2, the tail top material is ZG45, the semi-conical roller 3 is processed along the circular blank 2, and the spinning die The tire 4 is set on the machine tool spindle 5. The profile of the spinning mold tire 4 is the same as that of the machined part. The mold material is ZG45. During the molding process, the roller needs to roll the circular blank 2 so that it completely fits the spinning mold tire 4. Therefore, the requirements for the smoothness and surface integrity of the spinning mold 4 are very high, the smoothness is not less than Ra1.6, and the surface is not allowed to have pores, trachoma, knife joints, etc.

Specific steps include:

step 1:

According to the structure of the part, see attached figure 2. The profile is divided into three sections, namely a straight cone section with a half cone angle of 30°, an arc section with a radius of R100mm, and a straight cone section with a half cone angle of 47°. The half-cone angle at the small end of the part is 30°, and the half-cone angle gradually increases along the bus line of the part, reaching a maximum of 47° at the large end.

Step 2:

According to the above formula (3), it can be seen that the material thinning rate is the largest at the position with the smallest half cone angle:

The maximum thinning rate of the parts is calculated to be 0.5.

Step 3:

Using the ellipsoid test, the ultimate thinning rate of the part material GH4648 is calculated to be 0.63.

Step 4:

The spinning method is determined: the ultimate thinning rate of the part material is 0.63, and the ultimate thinning rate of the part is 0.5, which meets the requirements of direct shear spinning processing.

Step 5:

According to the drawing requirements, the maximum wall thickness of the part is 1.35mm and the minimum wall thickness is 0.86mm. Calculate the thickness of the blank:

According to the calculation, the thickness of the blank is between 1.72 and 1.84mm, and the wall thickness of the workpiece after spinning is qualified, so the wall thickness of the blank is selected to be 1.8mm.

Step 6:

Clamp the spinning mold on the machine tool spindle, use the tail jack to tighten the part, and adjust the outer circumferential runout of the mold to within 0.02mm.

Step 7:

The calculated gap between the roller and the mold is 0.9~1.3mm, add -20% rebound gap, and the final gap is set to 0.72~1.04mm.

Step 8:

Part lubrication: Apply molybdenum disulfide evenly on the surface of the blank.

Step 9:

Roller arc: The thickness of the processed blank is 1.8mm. The roller arc is 2 to 4 times the thickness of the blank. The roller arc should be 3.6 to 7.2mm. The final selected arc is R4mm.

Step 10:

Parts processing: Start the equipment, the rollers spin the blank along the mold surface, and complete the parts in one pass.

Step 11:

Disassemble the parts: After the parts are processed on the mold, return the tail top, remove the parts, and clean the remaining molybdenum disulfide on the workpiece.

When parts need to be replaced, repeat steps (6) to (11). When replacing similar structural parts, repeat steps (1) to (11).

The present invention clarifies the spin processing method through theoretical calculation, which can avoid unreasonable design of tooling, customized blanks with unreasonable thickness or diameter, reduce unnecessary waste products produced by trial processing, and greatly reduce production costs. Theoretical analysis and calculation can also shorten the processing cycle and avoid detours in process arrangements.

Spin forming processes high-temperature alloy sheet metal parts. Straight high-temperature alloy blanks can be directly processed into curved surface parts, eliminating the need for shell welds. The quality of processed parts is excellent. The surface finish of the parts can reach above Ra1.6. The accuracy of diameter size and profile is guaranteed to be within 0.5mm, and the wall thickness accuracy is controlled within 0.05mm. The processing quality of the workpiece is far better than that of sheet-welded formed parts. . The processing efficiency is extremely high. It takes at least 3 to 5 days to process such parts using the sheet welding forming process. After using this technology, the processing time is shortened to less than 5 minutes, and the processing efficiency is increased by more than 99%. The number of tooling requirements is significantly reduced. Only one set of spinning molds are needed. Compared with the sheet welding forming process, there are fewer welding fixtures, heat treatment fixtures, forming molds, and lathe fixtures. The tooling requirements are reduced by 75%.

Embodiments of the present invention also disclose a spinning processing system for curved high-temperature alloy sheet metal parts, including a limit thinning rate calculation module, a spinning processing judgment module, a wool wall thickness calculation module and a processing module;

The ultimate thinning rate calculation module is used to calculate the ultimate thinning rate of the workpiece to be processed and the ultimate thinning rate of the workpiece material;

The spinning process judgment module is used to determine whether the workpiece can be spin-processed based on the limit thinning rate of the workpiece and the limit thinning rate of the workpiece material. If so, execute the wool wall thickness calculation module;

The wool wall thickness calculation module is used to calculate the wall thickness range of wool required for the workpiece to be processed;

The processing module is used to select the corresponding wool material according to the wall thickness range and start spinning forming processing.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall 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.