A method for calculating the deformation step difference of a flexible stretch bending die for profiles

Abstract

This invention discloses a method for calculating the deformation step difference of a flexible profile bending die, comprising: Step 1, determining the combination form of the flexible profile bending die based on its structure, wherein the combination form is either a fan-shaped combination or a parallel combination; Step 2, determining the radius and envelope angle of the profile part to be formed; Step 3, determining the number of flexible units of the flexible bending die based on its structure; Step 4, establishing the geometric equation for the deformation step difference of the fan-shaped combination or the parallel combination of the flexible profile bending die; Step 5, calculating the deformation step difference of the flexible profile bending die with the corresponding combination form based on the geometric equation for the deformation step difference. This invention solves the problem that during the forming process of a flexible profile bending die, the discontinuous forming of the part due to the existence of contact and non-contact areas between the part and the die leads to a deformation difference between the non-contact area and the part surface, directly affecting the forming quality of the part.

Description

Technical Field

[0001] This invention relates to, but is not limited to, the field of flexible bending die technology for profiles, and specifically to a method for calculating the deformation step difference of a flexible bending die for profiles. Background Technology

[0002] The flexible bending die for profiles uses discrete flexible units instead of the original integral die. By adjusting the position of each flexible unit, different forming shapes of the die surface can be obtained. This solves the problem that the bending die must be changed every time the part type is changed when bending traditional parts, which greatly improves the manufacturing efficiency of bending parts and reduces manufacturing costs.

[0003] Due to the structural characteristics of flexible bending dies for profiles, there are contact areas and non-contact areas between the parts and the die. Because of the discontinuous forming of the parts, there is a deformation difference between the non-contact areas and the part's surface, directly affecting the forming quality of the parts. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned technical problems. This invention provides a method for calculating the deformation step difference of a flexible profile bending die, in order to solve the problem that during the forming process of a flexible profile bending die, the discontinuous forming of the part is caused by the existence of contact and non-contact areas between the part and the die, resulting in a deformation difference between the non-contact area and the part surface, which directly affects the forming quality of the part.

[0005] The technical solution of the present invention: In a first aspect, embodiments of the present invention provide a method for calculating the deformation step difference of a flexible bending die for profiles, characterized by comprising the following steps:

[0006] Step 1: Based on the structure of the flexible bending die for the profile, determine the combination form of the flexible bending die for the profile. The combination form is either a fan-shaped combination or a parallel combination.

[0007] Step 2: Determine the radius and envelope angle of the profile part to be formed;

[0008] Step 3: Based on the structure of the flexible bending die for the profile, determine the number of flexible units in the flexible bending die;

[0009] Step 4: Establish the geometric equation for the deformation step difference of the flexible bending die for the fan-shaped combined profile or the parallel combined profile.

[0010] Step 5: Based on the geometric equation of the deformation step difference of the flexible bending die for profiles, calculate the deformation step difference of the flexible bending die for the corresponding combination form.

[0011] Optionally, in the above-described method for calculating the deformation step difference of a flexible profile bending die, the flexible profile bending die determined in step one is a fan-shaped combination type. The overall structure of the fan-shaped combination type flexible profile bending die is a fan-ring structure. Multiple flexible units in the radial direction are evenly arranged along the circumference of the fan-ring structure, and each flexible unit is used to move in the radial direction.

[0012] Optionally, in the above-described method for calculating the deformation step difference of a flexible profile bending die, the flexible profile bending die determined in step one is a fan-shaped combination type. The overall structure of the fan-shaped combination type flexible profile bending die is a fan-ring structure. Multiple flexible units in the radial direction are evenly arranged along the circumference of the fan-ring structure, and each flexible unit is used to move in the radial direction.

[0013] Optionally, in the above-described method for calculating the deformation step difference of a flexible profile bending die, in step four, the geometric equation for the deformation step difference of the fan-shaped combined flexible profile bending die is established as follows:

[0014]

[0015] Where θ is the envelope angle of the profile part, R is the radius of the profile part, and n1 is the number of flexible units in the fan-shaped combined profile flexible bending die.

[0016] Optionally, in the above-described method for calculating the deformation step difference of a flexible profile bending die, the flexible profile bending die determined in step one is a parallel combination type. The multiple flexible units of the parallel combination type flexible profile bending die are arranged vertically and parallel to each other. Each flexible unit moves in the vertical direction. Let δ(i) represent the deformation step difference formed between the i-th flexible unit and the (i+1)-th flexible unit. The outermost flexible unit is marked as the first flexible unit, and the markings towards the center are increased sequentially until the flexible unit at the very center is obtained. The flexible unit at the center is marked as (n+1) / 2.

[0017] Optionally, in the above-described method for calculating the deformation step difference of a flexible profile bending die, the deformation step difference of the parallel combined flexible profile bending die can be divided into the deformation step difference generated between the first flexible unit and the second flexible unit and the deformation step difference generated between other adjacent flexible units.

[0018] Optionally, in the above-described method for calculating the deformation step difference of a flexible profile bending die, in step four, the deformation step difference between the first flexible unit and the second flexible unit of the parallel combined flexible profile bending die is δ2(1), and the geometric equation for the deformation step difference of the parallel combined flexible profile bending die is established as follows:

[0019] i=1,

[0020]

[0021] Where θ is the envelope angle of the profile part, R is the radius of the profile part, and n2 is the number of flexible units in the parallel combined profile flexible bending die.

[0022] Optionally, in the above-described method for calculating the deformation step difference of a flexible profile bending die, the deformation step difference between adjacent flexible units other than the deformation step difference generated between the first and second flexible units is δ2(i), and the deformation step difference gradually decreases from the outside to the center, where the value of i is i≥2.

[0023] Optionally, in the above-described method for calculating the deformation step difference of a flexible profile bending die, in step four, for the deformation step difference generated between other adjacent flexible units of the parallel combined flexible profile bending die, the geometric equation for the deformation step difference of the parallel combined flexible profile bending die is established as follows:

[0024] When i≥2, ;

[0025]

[0026] Where θ is the envelope angle of the profile part, R is the radius of the profile part, and n2 is the number of flexible units in the parallel combined profile flexible bending die.

[0027] In a second aspect, embodiments of the present invention also provide a computer-readable storage medium, characterized in that it includes: a memory and a processor;

[0028] The memory is configured to store executable instructions;

[0029] The processor is specifically configured to implement the deformation step calculation method for the flexible bending die of the profile as described above when executing the executable instructions stored in the memory.

[0030] The beneficial effects of this invention are as follows: Addressing the current problems of lacking a positive calculation basis for the deformation step difference of flexible bending dies for profiles, relying on engineering design experience, resulting in long design cycles and uncontrollable forming accuracy, this invention proposes a method for calculating the deformation step difference of flexible bending dies for profiles. By determining two combination forms of the flexible bending die, and based on the given radius of the profile part, envelope angle, and the number of flexible units in the flexible bending die, geometric equations for the deformation step difference of the flexible bending die under the two combination forms are established. The deformation step difference of the profile manufactured based on the flexible bending die is calculated through the geometric equations, ensuring the controllability of profile forming accuracy and reducing engineering trial and error. Attached Figure Description

[0031] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of the present invention and do not constitute a limitation on the technical solutions of the present invention.

[0032] Figure 1 A flowchart illustrating a method for calculating the deformation step difference of a flexible bending die for profiles, provided in an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of a fan-shaped combined profile flexible bending die provided in an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of a parallel combined profile flexible bending die provided in an embodiment of the present invention;

[0035] Figure 4 This is a curve showing the deformation step of the flexible bending die for profiles in the form of a fan-shaped combination as a function of the number of flexible units in an embodiment of the present invention.

[0036] Figure 5 This is a graph showing the deformation step of the parallel combination type of flexible bending die for profiles in an embodiment of the present invention as a function of the number of flexible units;

[0037] Figure 6 The deformation step distribution curve of each two adjacent flexible units in the parallel combination of 27 flexible units provided in the embodiment of the present invention is shown. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

[0039] As explained in the background section above, the advantages of flexible profile bending dies in the bending forming process are significant. However, due to the presence of contact and non-contact areas between the parts and the die, the discontinuous forming of the parts results in a deformation difference between the non-contact areas and the part surface, which directly affects the forming quality of the parts.

[0040] To address the aforementioned issues, the designers of this invention calculated and determined the deformation step distribution of a multi-point flexible bending die to ensure that the deformation difference between the non-contact area and the theoretical surface of the part does not exceed the deformation step requirement. Currently, the deformation step of flexible bending dies for profiles lacks positive design theoretical support and is mostly based on the designer's experience, with verification and correction through subsequent experimental trial and error methods. This results in low work efficiency, significant part waste, and uncontrollable forming accuracy. To positively evaluate the deformation step of flexible bending dies for profiles and improve the forming accuracy of parts, this invention proposes a method for calculating the deformation step of flexible bending dies for profiles.

[0041] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0042] Figure 1 This is a flowchart illustrating a method for calculating the deformation step difference of a flexible bending die for profiles, as provided in an embodiment of the present invention. Figure 1 As shown, the method for calculating the deformation step difference of a flexible bending die for profiles provided in this embodiment of the invention includes the following steps:

[0043] Step 1: Determine the combination form of the flexible bending die for the profile: fan-shaped combination and parallel combination;

[0044] Step two: Determine the radius and envelope angle of the profile part;

[0045] Step 3: Determine the number of flexible units in the flexible bending die;

[0046] Step 4: Establish the geometric equations for the deformation steps of the flexible bending die for profiles under the fan-shaped combination type and the parallel combination type, respectively.

[0047] Step 5: Based on the geometric equation of the deformation step difference of the flexible bending die for profiles, calculate the deformation step difference of the flexible bending die for profiles under the two combination forms.

[0048] In one implementation of this invention, the flexible bending die determined in step one is a fan-shaped combination type, such as... Figure 2 The diagram shown is a schematic of a fan-shaped combined profile flexible bending die provided in an embodiment of the present invention. The overall structure of the fan-shaped combined profile flexible bending die in this implementation is a fan-shaped ring structure. Multiple flexible units are evenly arranged radially along the circumference of the fan-shaped ring structure, and each flexible unit is used to move radially.

[0049] In this implementation method, the geometric equation for the deformation step difference of the flexible bending die for the fan-shaped combined profile, established in step four, is as follows:

[0050]

[0051] Where θ is the envelope angle of the profile part, R is the radius of the profile part, and n1 sector combination formula is the number of flexible units of the profile flexible bending die.

[0052] In another implementation of this invention, the flexible bending die for the profile determined in step one is a fan-shaped combination type, such as... Figure 3 The diagram shown is a schematic of a parallel combined flexible bending die for profiles according to an embodiment of the present invention. In this implementation, multiple flexible units of the parallel combined flexible bending die for profiles are arranged vertically and parallel to each other. Each flexible unit moves along the vertical direction. Let δ(i) represent the deformation step difference formed between the i-th flexible unit and the (i+1)-th flexible unit. The outermost flexible unit is marked as the first flexible unit, and the marking increases sequentially towards the center until the flexible unit at the very center is reached. The flexible unit at the center is marked as (n+1) / 2.

[0053] It should be noted that in this implementation method, there are two situations for the parallel combined flexible bending die: the deformation step difference can be divided into the deformation step difference generated between the first flexible unit and the second flexible unit, and the deformation step difference generated between other adjacent flexible units.

[0054] For the first case mentioned above, i.e., the deformation step difference between the first and second flexible units of the parallel combined profile flexible bending die is δ2(1), the geometric equation for the deformation step difference of the parallel combined profile flexible bending die is established as follows:

[0055] i=1,

[0056]

[0057] Where θ is the envelope angle of the profile part, R is the radius of the profile part, and n2 is the number of flexible units in the parallel combined profile flexible bending die.

[0058] For the second scenario described above, where the deformation step difference between adjacent flexible units other than the one between the first and second flexible units is δ2(i), the deformation step difference gradually decreases from the outside towards the center, and in this case, the value of i is i≥2. The geometric equation for the deformation step difference of the parallel combined profile flexible bending die is established as follows:

[0059] When i≥2, ;

[0060]

[0061] Where θ is the envelope angle of the profile part, R is the radius of the profile part, and n2 is the number of flexible units in the parallel combined profile flexible bending die.

[0062] Based on the deformation step calculation method for flexible bending die of profile provided in the above embodiments of the present invention, the present invention also provides a computer-readable storage medium, including: a memory and a processor;

[0063] The memory is configured to store executable instructions;

[0064] The processor is specifically configured to implement the deformation step calculation method for the flexible bending die of the profile as provided in any of the above embodiments when executing the executable instructions stored in the memory.

[0065] To address the current issues of lacking a positive calculation basis for the deformation step difference of flexible bending dies for profiles, relying on engineering design experience, resulting in long design cycles and uncontrollable forming accuracy, this invention proposes a method for calculating the deformation step difference of flexible bending dies for profiles. By determining two combination forms of the flexible bending die, and based on the given radius of the profile part, envelope angle, and number of flexible units in the flexible bending die, geometric equations for the deformation step difference of the flexible bending die under the two combination forms are established. The deformation step difference of the profile manufactured based on the flexible bending die is calculated through the geometric equations, ensuring the controllability of profile forming accuracy and reducing engineering trial and error.

[0066] The following application example illustrates the implementation of the deformation step calculation method for the flexible bending die of profiles provided in this embodiment of the invention.

[0067] Application Examples

[0068] Taking the part radius as 1762mm and the part envelope angle as 33°, the geometric equation for the deformation step difference of the sector-shaped combined profile flexible bending die is calculated as follows:

[0069]

[0070] The deformation step of the flexible bending die for the fan-shaped composite profile can be obtained as a function of the number of flexible units n1, as shown in the figure. Figure 4 As shown in the figure, the curve of the deformation step of the flexible bending die of the fan-shaped combination form of the present invention varies with the number of flexible units.

[0071] The calculated geometric equation for the deformation step difference of the parallel combined profile flexible bending die is as follows:

[0072] When i=1, ;

[0073]

[0074] When i≥2

[0075]

[0076] The calculated curves show the deformation step difference between the outermost flexible unit and the adjacent flexible unit of the parallel composite profile flexible bending die as a function of the number of flexible units n2, as shown in the figure. Figure 5 The figure shows a curve illustrating the deformation step difference of the parallel combination flexible bending die for profiles in an embodiment of the present invention as a function of the number of flexible units. Further, when the number of flexible units is 27, the deformation step difference between each flexible unit of the parallel combination flexible bending die for profiles is calculated, as shown below. Figure 6 The figure shown is a curve illustrating the deformation step distribution between adjacent flexible units of a profile flexible bending die based on a parallel combination of 27 flexible units provided in an embodiment of the present invention.

[0077] While the embodiments disclosed in this invention are as described above, they are merely illustrative of the embodiments to facilitate understanding of the invention and are not intended to limit the invention. Any person skilled in the art to which this invention pertains may make any modifications and variations in the form and details of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection for this invention shall still be determined by the scope defined in the appended claims.

Claims

1. A method for calculating the deformation step difference of a flexible bending die for profiles, characterized in that, Includes the following steps; Step 1: Based on the structure of the flexible bending die for the profile, determine the combination form of the flexible bending die for the profile. The combination form is: parallel combination. Step 2: Determine the radius and envelope angle of the profile part to be formed; Step 3: Based on the structure of the flexible bending die for the profile, determine the number of flexible units in the flexible bending die; Step 4: Establish the geometric equation for the deformation step difference of the parallel combined profile flexible bending die; Step 5: Based on the geometric equation of the deformation step difference of the flexible stretch bending die for profiles, calculate the deformation step difference of the flexible stretch bending die for the corresponding combination form. In step four, the deformation step difference between the first flexible unit and the second flexible unit of the parallel combined profile flexible bending die is: The geometric equation for the deformation step difference of the parallel combined flexible bending die is established as follows: ； Where θ is the envelope angle of the profile part, and R is the radius of the profile part. The number of flexible units in a parallel composite profile flexible bending die; In step four, for the deformation step difference generated between other adjacent flexible units of the parallel combined profile flexible bending die, the geometric equation for the deformation step difference of the parallel combined profile flexible bending die is established as follows: ； Where θ is the envelope angle of the profile part, and R is the radius of the profile part. The number of flexible units in a parallel composite profile flexible bending die.

2. The method for calculating the deformation step difference of a flexible bending die for profiles according to claim 1, characterized in that, The flexible bending die for profiles determined in step one is a fan-shaped combination type. The overall structure of the fan-shaped combination type flexible bending die for profiles is a fan-ring structure. Multiple flexible units in the radial direction are evenly arranged along the circumference of the fan-ring structure. Each flexible unit is used to move in the radial direction.

3. The method for calculating the deformation step difference of a flexible bending die for profiles according to claim 2, characterized in that, In step four, the geometric equation for the deformation step difference of the fan-shaped combined profile flexible bending die is established as follows: ； Where θ is the envelope angle of the profile part, and R is the radius of the profile part. The number of flexible units in a fan-shaped combined profile flexible bending die.

4. The method for calculating the deformation step difference of a flexible bending die for profiles according to claim 1, characterized in that, The flexible bending die for profiles determined in step one is a parallel combination type. Multiple flexible units of the parallel combination type flexible bending die are arranged vertically and parallel to each other. Each flexible unit moves along the vertical direction. This represents the deformation step difference formed between the i-th flexible unit and the (i+1)-th flexible unit. The outermost flexible unit is marked as the first flexible unit, and the markings increase sequentially towards the center until the flexible unit at the very center is obtained. The flexible unit at the center is marked as (n+1) / 2.

5. The method for calculating the deformation step difference of a flexible bending die for profiles according to claim 4, characterized in that, The deformation step of the parallel combined flexible bending die can be divided into the deformation step between the first flexible unit and the second flexible unit and the deformation step between other adjacent flexible units.

6. The method for calculating the deformation step difference of a flexible bending die for profiles according to claim 4, characterized in that, The parallel composite flexible bending die for profiles, except for the deformation step difference between the first and second flexible units, has the following deformation step difference between adjacent flexible units: The deformation step gradually decreases from the outside to the center, and at this time the value of i is i≥2.

7. A computer-readable storage medium, characterized in that, include: Memory and processor; The memory is configured to store executable instructions; The processor is specifically configured to implement the deformation step calculation method for the flexible bending die of profiles as described in any one of claims 1 to 6 when executing the executable instructions stored in the memory.

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