Rectangular section ring piece blank design method

Abstract

The invention discloses a design method for a rectangular-section ring piece blank, and belongs to the technical field of ring piece machining and forming. The method mainly comprises the following steps: S1, inputting equipment parameters and ring piece parameters; s2, the inner diameter d0 of the ring piece blank is determined; s3, the outer diameter D0 of the ring piece blank is determined; s4, the wall thickness B0 of the ring piece blank is determined; s5, the height H0 of the ring piece blank is determined; s6, the height-diameter ratio lambda1, the height-thickness ratio lambda2, the rolling ratio lambda3 and the blank manufacturing upsetting force Fd of the ring piece blank are calculated; s7, according to the reasonability of the size of the ring piece blank, if the size of the ring piece blank is not reasonable, the outer diameter D0 of the ring piece blank is selected again, and the step S4 to the step S7 are repeated till all the conditions are met; and S8, the reasonable ring piece outer diameter D0, ring piece inner diameter d0, ring piece height H0 and ring piece wall thickness B0 are determined according to the step S7. According to the design method for the rectangular-section ring piece blank, the effect of improving the rolling forming quality and efficiency of the ring piece is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ring forming, and more particularly to a design method of a rectangular cross-section ring blank. BACKGROUND

[0002] The blank used for ring rolling has a direct impact on the quality and efficiency of ring rolling forming. In the prior art, the design of the blank often relies on empirical formula or geometric calculation, and the conditions required for stable rolling and the limitations of equipment parameters and capacity are ignored in the design process, which can easily lead to the fact that the designed blank size does not meet the actual production needs. Therefore, how to design a scientific and reasonable blank size calculation method has become the key to improving the quality of ring rolling forming.

[0003] Guo Lianggang et al. invented a ring blank size determination method based on rolling ratio K and radial-axial deformation distribution ratio tanα (CN101829686A: A method for determining the radial-axial rolling blank size of a ring) for the radial-axial rolling process of a rectangular cross-section ring, but the calculation process of this blank design method is complex and tedious, and the designed blank size is not practical for factory production.

[0004] Therefore, it is necessary to provide a rectangular cross-section ring blank design method to solve the above problems. SUMMARY

[0005] Based on the above problems existing in the prior art, the purpose of the embodiments of the present application is to provide a rectangular cross-section ring blank design method, which comprehensively considers the stable rolling conditions, equipment capacity limitations and actual production process parameters, ensures that the designed blank size can meet the theoretical requirements and can be efficiently implemented in the specific production environment, simplifies the calculation process, and improves the practicality and operability of the design results, thereby effectively improving the quality and efficiency of ring rolling forming.

[0006] The technical scheme adopted by the present application to solve its technical problems is: a rectangular cross-section ring blank design method, comprising the following steps: S1, inputting equipment parameters and ring parameters; S2, determining the inner diameter d0 of the ring blank; S3, determining the outer diameter D0 of the ring blank; S4, determining the wall thickness B0 of the ring blank; S5, determining the height H0 of the ring blank; S6, calculating the height-diameter ratio λ1, the height-thickness ratio λ2, the rolling ratio λ3 and the blank manufacturing upsetting force F d ; S7, according to the ring blank size rationality, if not reasonable, then reselect ring blank outer diameter D0, and repeat step S4 to step S7, until all conditions are met; S8, according to step S7 to determine reasonable ring outer diameter D0, ring inner diameter d0, ring height H0, ring wall thickness B0.

[0007] Further, in the step S1, the equipment parameters and ring parameters include: Ring rolling parameters: ring outer diameter D1, ring inner diameter d1, ring height H1, ring wall thickness B1; Technical parameters of ring rolling mill for ring rolling: main roller diameter D Z , main roller radius R Z , core roller diameter D X , core roller radius R X ; Technical parameters of press for ring blanking: nominal force F; Yield strength of ring material at upsetting temperature .

[0008] Further, in the step S2, d0=D X +C, wherein C is the gap between the blank inner diameter and the core roller, which is selected according to the equipment and process needs.

[0009] Further, in the step S3, the relationship among the ring blank wall thickness B0, the ring blank outer diameter D0 and the ring blank inner diameter d0 is: (1) The maximum wall thickness B 0max of the ring that can be stably rolled according to the bite condition and the forging penetration condition is: (2) According to formula (1) and formula (2), the maximum outer diameter D 0max of the ring blank that satisfies the stable rolling condition is: d0 (3) β in formula (2), (3) is the friction angle between the ring and the roller, β=atan(μ), μ is the friction coefficient between the ring and the roller, which is determined according to the actual production data; Determine the ring blank outer diameter D0: According to the maximum outer diameter D 0max of the ring blank, a ring blank outer diameter value D0 is preliminarily selected.

[0010] Further, in the step S4, B0 is calculated according to formula (1) and the ring blank outer diameter D0 and the ring blank inner diameter d0 that have been determined.

[0011] Further, in the step S5, η in formula (4) is fire loss, and η is determined according to actual production data.

[0012] Further, in the step S6, the ring blank outer diameter D0, the ring blank inner diameter d0, and the ring blank height H0 obtained in the steps S3, S4 and S5 are used to calculate the ring blank height-diameter ratio λ1, the ring blank height-thickness ratio λ2, the rolling ratio λ3, and the blank manufacturing upsetting force F d

[0013]

[0014]

[0015]

[0016] Further, in the step S7, λ1, λ2, λ3, F d satisfy the following conditions: λ1≤0.5, λ2≤1, λ3≤8, F d ≤F.

[0017] The beneficial effects of the present application are: By comprehensively considering the stable rolling conditions, the equipment capacity limit, and the actual production process parameters, it is ensured that the designed blank size can not only meet the theoretical requirements, but also can be efficiently implemented in the specific production environment. This method not only simplifies the calculation process, but also significantly improves the practicality and operability of the design results, thereby effectively improving the quality and efficiency of ring rolling forming. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which form a part of the present application, are used to provide further understanding of the present application, and the illustrative embodiments of the present application and their description serve the purpose of explaining the present application. The accompanying drawings should not be used to limit the present application unduly. In the drawings: Figure 1 FIG. 1 is a flowchart of a ring blank design method according to the present application; Figure 2 FIG. 2 is a schematic diagram of a ring blank according to the present application; Figure One Figure 3 FIG. 3 is a schematic diagram of a ring blank according to the present application; Figure Two DETAILED DESCRIPTION

[0019] ​​​​​It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0020] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0021] In the present application, unless otherwise specified, the orientation such as "up, down" is generally directed to the direction shown in the drawings, or is directed to the vertical, perpendicular or gravity direction; similarly, for the convenience of understanding and description, "left, right" is generally directed to the left and right shown in the drawings; "inner, outer" refers to the inner and outer relative to the contour of each component itself, but the above orientation words are not used to limit the present application.

[0022] As shown in Figure 1 , the present application provides a rectangular cross-section ring blank design method, comprising the following steps: S1, obtaining and inputting the following technical parameters: Ring rolling parameters: ring outer diameter D1, ring inner diameter d1, ring height H1, ring wall thickness B1; Technical parameters of the ring rolling mill for rolling the ring: main roller diameter D Z , main roller radius R Z , core roller diameter D X , core roller radius R X ; Technical parameters of the press for ring blanking: nominal force F; Yield strength of ring material at upsetting temperature ; S2, determining the inner diameter d0 of the ring blank: d0=D X +C, wherein C is the gap between the blank inner diameter and the core roller, which is selected according to the equipment and process needs; S3, determining the outer diameter D0 of the ring blank: The relationship among the ring blank wall thickness B0, the ring blank outer diameter D0 and the ring blank inner diameter d0 is: (1) The maximum wall thickness B 0max of the ring that can be stably rolled under the biting condition and the forging penetration condition is: (2) According to formula (1) and formula (2), the maximum outer diameter D 0max of the ring blank that satisfies the stable rolling condition is: d0 (3) β in formula (2), (3) is the friction angle between the ring and the roller, β = atan (μ), μ is the friction coefficient between the ring and the roller, which is determined according to actual production data; Determine the outer diameter D0 of the ring blank: According to the maximum outer diameter D 0max 0 of the ring blank, preliminarily select a ring blank outer diameter value D0.

[0023] S4, determine the wall thickness B0 of the ring blank: According to formula (1) and the ring blank outer diameter D0 and the ring blank inner diameter d0 that have been determined, calculate B0; S5, determine the height H0 of the ring blank:

[0024] In formula (4), η is the fire loss, which is determined according to actual production data; S6, calculate the height-diameter ratio λ1, height-thickness ratio λ2, rolling ratio λ3 and blank manufacturing upsetting force F d : According to the ring blank outer diameter D0, the ring blank inner diameter d0 and the ring blank height H0 obtained in steps S3, S4 and S5, calculate the height-diameter ratio λ1, height-thickness ratio λ2, rolling ratio λ3 and blank manufacturing upsetting force F d :

[0025]

[0026]

[0027]

[0028] S7, according to the height-diameter ratio λ1, height-thickness ratio λ2, rolling ratio λ3 and blank manufacturing upsetting force F d , judge whether the blank size is reasonable, if not, reselect the ring blank outer diameter D0, and repeat steps S4 to S7 until all conditions are met.

[0029] According to actual production experience, λ1, λ2, λ3, F d satisfy the following conditions: λ1≤0.5, λ2≤1, λ3≤8, F d ≤F; S8, according to step S7, determine the reasonable ring outer diameter D0, ring inner diameter d0, ring height H0 and ring wall thickness B0.

[0030] The method for designing the size of a rectangular cross-section ring blank in axial rolling will be further explained in detail below in combination with the drawings and specific embodiments.

[0031] As shown in Figure 2 and Figure 3 , the outer diameter D1 of the ring is 5084 mm, the inner diameter d1 of the ring is 4368 mm, the height H1 of the ring is 230 mm, and the wall thickness b1 of the ring is 358 mm. The main roller diameter D Z of the ring rolling machine is 1213 mm, the main roller radius R Z is 606.5 mm, the core roller diameter D X is 370 mm, the core roller radius R X is 185 mm, and the gap C between the ring and the core roller is 20 mm. The friction coefficient between the ring and the roller is μ=0.3, the yield strength of the ring blank at the upsetting temperature is σ =7.1 MPa, the nominal force of the press F is 40000 kN, and the fire loss η of the ring during rolling is 0.015. The design steps of the size of the ring blank are as follows: 1. Determine the ring blank d0: d0=D X +C=370+20=390 mm 2. Determine the outer diameter D0 of the ring blank: The maximum outer diameter D 0max of the ring blank is:

[0032] Take D0=1700 mm 3. Determine the wall thickness B0 of the ring blank:

[0033] 4. Determine the height H0 of the ring blank:

[0034] Take =580 mm 5. Calculate the height-diameter ratio λ1, the height-thickness ratio λ2, the rolling ratio λ3, and the blank manufacturing upsetting force F d :

[0035]

[0036]

[0037]

[0038]

[0039] 6. Determine the blank size rationality: λ1=0.34<0.5, λ2=0.89<1, λ3=4.61<8, F d =22100kN<F=40000kN.

[0040] λ 1、 λ2, λ3, F d Satisfy the condition, the ring blank size is reasonable.

[0041] 7. The reasonable ring outer diameter D0, ring inner diameter d0, ring height H0, ring wall thickness B0 are: D0=1700mm d0=390mm H0=580mm B0=655mm.

[0042] Obviously, the above described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative labor should belong to the protection scope of the present application.

[0043] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, work, device, component and / or combination thereof.

[0044] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0045] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

[0046] The above merely describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-described embodiments. Any technical solution falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary skilled persons in the art, some improvements and refinements without departing from the principles of the present application shall also be considered as falling within the protection scope of the present application.

Claims

1. A method for designing a rectangular cross-section ring blank, characterized by: The following steps are involved: S1. Input equipment parameters and ring parameters; S2, determine the inner diameter d0 of the ring blank; S3, determine the outer diameter D0 of the ring blank; S4, determine the wall thickness B0 of the ring blank; S5, determine the height H0 of the ring blank; S6. Calculate the ring blank height-to-diameter ratio λ1, height-to-thickness ratio λ2, rolling ratio λ3 and blank manufacturing upsetting force F d ; S7, based on the rationality of the ring blank size, if it is unreasonable, reselect the ring blank outer diameter D0, and repeat steps S4 to S7 until all conditions are met; S8. Determine reasonable ring outer diameter D0, ring inner diameter d0, ring height H0, and ring wall thickness B0 according to step S7.

2. A method for designing a rectangular cross-section ring blank according to claim 1, characterized in that: In step S1, the equipment parameters and ring parameters include: Ring rolling parameters: ring outer diameter D1, ring inner diameter d1, ring height H1, ring wall thickness B1; The technical parameters of the ring rolling machine used for the ring rolling: Main roller diameter D Z , Main roller radius R Z , core roller diameter D X , core roller radius R X ; Technical parameters of the press for ring blanking: nominal force F; Yield strength of ring material at upsetting temperature .

3. The method for designing a rectangular cross-section ring blank according to claim 2, characterized in that: In step S2, d0=D X +C, where C is the gap between the inner diameter of the blank and the core roller, which is selected according to the equipment and process requirements.

4. A method for designing a rectangular cross-section ring blank according to claim 3, characterized in that: In step S3, the relationship between the ring blank wall thickness B0, the ring blank outer diameter D0, and the ring blank inner diameter d0 is: (1) The maximum wall thickness B of the ring that meets the bite conditions and forging conditions and can be stably rolled 0max for: (2) According to equations (1) and (2), the maximum outer diameter D of the ring blank that satisfies the stable rolling conditions is obtained: 0max for: d0 (3) In formulas (2) and (3), β is the friction angle between the ring and the roller, β=atan(μ), μ is the friction coefficient between the ring and the roller, which is determined according to actual production data; Determine the outer diameter D0 of the ring blank: According to the maximum outer diameter D of the ring blank 0max , preliminarily select a ring blank outer diameter value D0.

5. The method for designing a rectangular cross-section ring blank according to claim 4, characterized in that: In step S4, B0 is calculated based on formula (1) and the already determined outer diameter D0 and inner diameter d0 of the ring blank.

6. A method for designing a rectangular cross-section ring blank according to claim 5, characterized in that: In the step S5, ; In formula (4), η is the fire loss, which is determined based on actual production data.

7. The method for designing a rectangular cross-section ring blank according to claim 6, characterized in that: In step S6, the ring blank height-to-diameter ratio λ1, height-to-thickness ratio λ2, rolling ratio λ3 and the blank manufacturing upsetting force F are calculated based on the ring blank outer diameter D0, ring blank inner diameter d0 and ring blank height H0 obtained in steps S3, S4 and S5. d : ； ； ； 。 8. The method for designing a rectangular cross-section ring blank according to claim 7, characterized in that: In step S7, λ1, λ2, λ3, F d The following conditions are met: λ1≤0.5,λ2≤1,λ3≤8,F d ≤F。

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