C-beam processing tool and C-beam processing method
By using a progressive bending forming method with C-beam machining fixtures, the problems of significant strength impact, increased part weight, and high verification costs in the segmented forming process of ultra-long C-beams have been solved, achieving integral forming without intermediate connections and improving maintainability.
Patent Information
- Application Number
- CN202610509665.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-17
- Publication Date
- 2026-05-29
AI Technical Summary
When using segmented forming technology for ultra-long C-shaped beams, there are problems such as the dynamic strength being greatly affected by the joint design, the joint structure causing increased weight of auxiliary beam parts, high cost of clause verification, and poor maintainability and inspectability.
Using C-beam processing fixtures, the gradual bending of straight plates is achieved through the cooperation of a fixed lower mold and a sliding upper mold to form C-beams, avoiding intermediate connection structures, reducing clause verification costs and improving maintainability and inspectability.
It achieves integral forming of ultra-long C-shaped beams without intermediate connecting structures, reducing the cost of clause verification and improving the maintainability and inspectability of parts.
Smart Images
Figure CN122099757A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of C-beam processing technology, and more particularly to C-beam processing fixtures and methods. Background Technology
[0002] The ultra-long C-beam is a key load-bearing structure in aircraft. Currently, ultra-long C-beams are usually manufactured using a segmented forming process. This process has several problems. First, the mechanical connection interfaces formed by the segmented joints disrupt the continuity of load transfer, inducing stress concentration under aerodynamic vibrations and maneuvering loads, leading to accelerated material fatigue damage. To compensate for the loss of connection strength, additional reinforcement structures are required. However, this significantly increases the weight of the component, affecting the aircraft's aerodynamic performance and flight energy consumption. Second, the segmented configuration requires complex airworthiness verification for multiple interface failure modes. The additional connection corrosion tests, discrete source impact tests, and multi-path force transmission analysis result in high verification costs. Third, the segmented joints can obscure internal damage, making it difficult to effectively identify cracks and corrosion using conventional testing methods. Furthermore, the disassembly and maintenance process can lead to wear at the mating interfaces, reducing the service life of the component. Summary of the Invention
[0003] According to one aspect of the present invention, a C-beam machining fixture is provided to solve the problems existing in the related art when using segmented forming process for ultra-long C-beams, such as the large influence of dynamic strength on the butt joint design, the increase in weight of auxiliary beam parts due to the butt joint structure, the high cost of clause verification, and the poor maintainability and inspectability.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: C-beam machining fixture, used to process straight plates into C-beams, wherein the C-beam includes a web and a first flange and a second flange located on both sides of the web; The C-beam processing fixture includes a fixed lower mold and a sliding upper mold. The outer surface of the fixed lower mold is C-shaped and adapted to the shape of the C-beam. The sliding upper mold has a first forming surface and a second forming surface arranged at an angle. The fixed lower mold is used to support the straight plate. The sliding upper mold can slide relative to the fixed lower mold in a forward or reverse direction. During the forward sliding of the sliding upper mold relative to the fixed lower mold, the first forming surface is always in contact with the straight plate, and the second forming surface can bend one side of the straight plate to form the first wing plate. During the reverse sliding of the sliding upper mold relative to the fixed lower mold, the first forming surface is always in contact with the straight plate, and the second forming surface can bend the other side of the straight plate to form the second wing plate.
[0005] As a preferred embodiment of the C-beam machining fixture, the angle between the web and the first flange and the design angle between the web and the second flange are both α. The sliding upper mold has a front end and a rear end. The angle between the rear end of the first forming surface and the rear end of the second forming surface of the sliding upper mold is α. The angle between the front end of the first forming surface and the front end of the second forming surface of the sliding upper mold is greater than α.
[0006] As a preferred embodiment of the C-beam machining fixture, the width of the second forming surface gradually increases along the direction from the front end to the rear end of the sliding upper mold.
[0007] As a preferred embodiment of the C-beam machining fixture, the fixed lower mold has a third forming surface and a fourth forming surface and a fifth forming surface located on both sides of the third forming surface. The third forming surface is used to support the straight plate. During the forward sliding of the sliding upper mold relative to the fixed lower mold, the first forming surface and the third forming surface are respectively in contact with the two side surfaces of the straight plate. The second forming surface can bend one side of the straight plate to form the first wing plate, and the second forming surface and the fourth forming surface are respectively located on both sides of the first wing plate. During the reverse sliding of the sliding upper mold relative to the fixed lower mold, the first forming surface and the third forming surface are respectively in contact with the two side surfaces of the straight plate. The second forming surface can bend the other side of the straight plate to form the second wing plate, and the second forming surface and the fifth forming surface are respectively located on both sides of the second wing plate.
[0008] As a preferred embodiment of the C-beam machining fixture, the included angle between the third forming surface and the fourth forming surface, as well as the included angle between the third forming surface and the fifth forming surface, are both α.
[0009] As a preferred embodiment of the C-beam machining fixture, the web plate and the first flange plate, as well as the web plate and the second flange plate, all have rounded corners; the first forming surface and the second forming surface, the third forming surface and the fourth forming surface, and the third forming surface and the fifth forming surface all have rounded corners.
[0010] According to another aspect of the present invention, a method for machining a C-beam is provided for machining a straight plate into a C-beam, the C-beam including a web and a first flange and a second flange respectively located on both sides of the web; the C-beam machining method is implemented by the aforementioned C-beam machining fixture; The C-beam fabrication method includes: S100: Determine the design dimensions of the straight plate based on the design dimensions of each part of the C-shaped beam to be processed, and process the straight plate; S200: Place the straight plate on the fixed lower mold and fix the straight plate relative to the fixed lower mold; S300: Control the sliding upper mold to slide in the forward direction relative to the fixed lower mold to form the first wing plate, and control the sliding upper mold to slide in the reverse direction relative to the fixed lower mold to form the second wing plate.
[0011] As a preferred embodiment of the C-beam fabrication method, the angle between the web and the first flange, and the designed angle between the web and the second flange, are both α. The C-beam processing method also includes the following steps after step S300: S400: Measure the size of the first included angle between the web and the first flange of the formed C-beam, and calculate the difference between the first included angle and α; measure the size of the second included angle between the web and the second flange of the formed C-beam, and calculate the difference between the second included angle and α. S500: Compare the difference between the first included angle and α with a preset difference, and compare the difference between the second included angle and α with a preset difference; If the difference between the first included angle and α does not exceed the preset difference, and the difference between the second included angle and α does not exceed the preset difference, then the processing of the C-shaped beam is determined to be complete.
[0012] As a preferred embodiment of the C-beam processing method, in step S500, if the difference between the first included angle and α exceeds the preset difference, or the difference between the second included angle and α exceeds the preset difference, then return to step S300.
[0013] As a preferred embodiment of the C-beam fabrication method, the C-beam is a variable cross-section C-beam, wherein the width of one end of the web of the variable cross-section C-beam is... The width of the other end is , The widths of the first wing and the second wing are both The thickness of the C-shaped beam is t, the angle between the web and the first flange and the design angle between the web and the second flange are both α, and there are rounded corners between the web and the first flange and between the web and the second flange, and the radius of the rounded corners is r. In step S100, determining the design dimensions of the straight plate based on the design dimensions of each part of the C-shaped beam to be processed includes: Calculate the length of the fillet region of the C-beam. ,in, ; Calculate the width of the straight plate. ,in, ; Calculate the narrow side length of the straight plate. ,in, .
[0014] The beneficial effects of this invention are: This invention provides a C-beam processing fixture for processing a straight plate into a C-beam. The C-beam includes a web and a first flange and a second flange located on both sides of the web. The C-beam processing fixture includes a fixed lower mold and a sliding upper mold. The outer surface of the fixed lower mold is C-shaped and adapted to the shape of the C-beam. The sliding upper mold has a first forming surface and a second forming surface arranged at an angle. The fixed lower mold is used to support the straight plate. The sliding upper mold can slide relative to the fixed lower mold in a forward or reverse direction. During the forward sliding of the sliding upper mold relative to the fixed lower mold, the first forming surface is always in contact with the straight plate, and the second forming surface can bend one side of the straight plate to form the first flange. During the reverse sliding of the sliding upper mold relative to the fixed lower mold, the first forming surface is always in contact with the straight plate, and the second forming surface can bend the other side of the straight plate to form the second flange. When machining a C-beam using this C-beam machining fixture, a straight plate is first fixedly placed on a fixed lower mold. Then, a sliding upper mold is controlled to slide forward relative to the fixed lower mold to form the first wing. Subsequently, the sliding upper mold is controlled to slide in the opposite direction relative to the fixed lower mold to form the second wing. This progressive method achieves the overall forming of the C-beam without intermediate connecting structures, effectively reducing verification costs and improving the maintainability and inspectability of the parts. Furthermore, since the sliding upper mold slides relative to the fixed lower mold to form the C-beam during machining, the length of the fixed lower mold must not be less than the length of the C-beam to be machined. The sliding upper mold only needs to be shaped to fit the C-beam; its length is not critical. This allows the C-beam machining fixture to be suitable for machining ultra-long C-beams.
[0015] This invention also provides a C-beam processing method, implemented using the aforementioned C-beam processing fixture. In this method, the design dimensions of a straight plate are determined based on the design dimensions of each part of the C-beam to be processed, and the straight plate is processed. The straight plate is placed on a fixed lower mold and fixed relative to the fixed lower mold. The sliding upper mold is controlled to slide in the forward direction relative to the fixed lower mold to form a first wing plate, and the sliding upper mold is controlled to slide in the reverse direction relative to the fixed lower mold to form a second wing plate. Thus, the overall forming of the C-beam is achieved in a progressive manner, without intermediate connecting structures, and can effectively reduce the cost of clause verification and improve the maintainability and inspectability of parts. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the straight plate structure in an embodiment of the present invention; Figure 2 This is a schematic diagram of the C-shaped beam in an embodiment of the present invention; Figure 3 This is a side view of one end of the C-shaped beam in an embodiment of the present invention; Figure 4 This is a side view of the other end of the C-shaped beam in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the fixed lower mold in an embodiment of the present invention; Figure 6 This is a schematic diagram of the sliding upper mold in an embodiment of the present invention; Figure 7 This is a front view schematic diagram of the sliding upper mold in an embodiment of the present invention; Figure 8 yes Figure 7 Sectional view of section AA; Figure 9 yes Figure 7 Sectional view of section BB; Figure 10 yes Figure 7 A sectional view of section C-C; Figure 11 This is a schematic diagram of the first structure of the C-beam machining fixture in an embodiment of the present invention; Figure 12 This is a schematic diagram of the second structure of the C-beam machining fixture in an embodiment of the present invention; Figure 13 This is a schematic diagram of the third structure of the C-beam machining fixture in an embodiment of the present invention; Figure 14 This is a schematic diagram of the fourth structure of the C-beam machining fixture in this embodiment of the invention; Figure 15 This is a flowchart of the C-beam processing method in an embodiment of the present invention.
[0017] In the picture: 10. Straight plate; 20. C-shaped beam; 201. Web plate; 202. First flange plate; 203. Second flange plate; 1. Fixed lower mold; 11. Third forming surface; 12. Fourth forming surface; 13. Fifth forming surface; 2. Sliding upper mold; 21. First forming surface; 22. Second forming surface. Detailed Implementation
[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.
[0019] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0020] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0021] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.
[0022] The ultra-long C-beam is a key load-bearing structure in aircraft. Currently, ultra-long C-beams are usually manufactured using a segmented forming process. This process has several problems. First, the mechanical connection interfaces formed by the segmented joints disrupt the continuity of load transfer, inducing stress concentration under aerodynamic vibrations and maneuvering loads, leading to accelerated material fatigue damage. To compensate for the loss of connection strength, additional reinforcement structures are required. However, this significantly increases the weight of the component, affecting the aircraft's aerodynamic performance and flight energy consumption. Second, the segmented configuration requires complex airworthiness verification for multiple interface failure modes. The additional connection corrosion tests, discrete source impact tests, and multi-path force transmission analysis result in high verification costs. Third, the segmented joints can obscure internal damage, making it difficult to effectively identify cracks and corrosion using conventional testing methods. Furthermore, the disassembly and maintenance process can lead to wear at the mating interfaces, reducing the service life of the component.
[0023] In response, this embodiment provides a C-beam machining fixture to solve the problems in related technologies when using segmented forming processes for ultra-long C-beams, such as the large impact of dynamic strength on the docking design, the increase in weight of auxiliary beam parts due to the docking structure, the high cost of clause verification, and the poor maintainability and inspectability. It can be used in the field of C-beam machining technology.
[0024] The C-beam machining fixture is used to machine the straight plate 10 into a C-beam 20, wherein the structure of the straight plate 10 is as follows: Figure 1 As shown, the structure of C-beam 20 is as follows: Figures 2-4 As shown, the C-shaped beam 20 includes a web 201 and a first flange 202 and a second flange 203 located on both sides of the web 201.
[0025] Reference Figures 5-6 The C-beam processing fixture includes a fixed lower mold 1 and a sliding upper mold 2. The outer surface of the fixed lower mold 1 is C-shaped and adapted to the shape of the C-beam 20. The sliding upper mold 2 has a first forming surface 21 and a second forming surface 22 arranged at an angle. The fixed lower mold 1 is used to support the straight plate 10. The sliding upper mold 2 can slide relative to the fixed lower mold 1 in the forward or reverse direction. During the forward sliding of the sliding upper mold 2 relative to the fixed lower mold 1, the first forming surface 21 is always in contact with the straight plate 10, and the second forming surface 22 can bend one side of the straight plate 10 to form a first wing plate 202. During the reverse sliding of the sliding upper mold 2 relative to the fixed lower mold 1, the first forming surface 21 is always in contact with the straight plate 10, and the second forming surface 22 can bend the other side of the straight plate 10 to form a second wing plate 203. When machining the C-beam 20 using this C-beam machining fixture, the straight plate 10 can be fixedly placed on the fixed lower mold 1 first, and then the sliding upper mold 2 can be controlled to slide in the positive direction relative to the fixed lower mold 1 to form the first wing plate 202, as shown below. Figures 11-12 As shown. Then, the sliding upper mold 2 is controlled to slide in the opposite direction relative to the fixed lower mold 1 to form the second wing plate 203, as shown. Figures 13-14 As shown. This C-beam machining fixture can achieve the integral forming of the C-beam 20 in a progressive manner, without intermediate connecting structures, effectively reducing the cost of clause verification and improving the maintainability and inspectability of parts. Furthermore, since the sliding upper mold 2 slides relative to the fixed lower mold 1 to form the C-beam 20 during machining, the length of the fixed lower mold 1 cannot be less than the length of the C-beam 20 to be machined, while the sliding upper mold 2 only needs to be shaped to match the C-beam 20, with no length requirement. This allows the C-beam machining fixture to be applicable to the machining of ultra-long C-beams. Specifically, this C-beam machining fixture can be used for machining conventional C-beams (where the cross-sectional shape and dimensions remain the same along the extension direction of the conventional C-beam) and also for machining variable cross-section C-beams (where the width of the web 201 gradually increases or decreases along the extension direction of the variable cross-section C-beam).
[0026] Reference Figures 6-10 The angle between the web 201 and the first flange 202, and the angle between the web 201 and the second flange 203, are both α. The sliding upper mold 2 has a front end and a rear end. The angle between the rear end of the first forming surface 21 and the rear end of the second forming surface 22 of the sliding upper mold 2 is α. The angle between the front end of the first forming surface 21 and the front end of the second forming surface 22 of the sliding upper mold 2 is greater than α. Therefore, when it is necessary to process the C-shaped beam 20, the front end of the sliding upper mold 2 can first contact the straight plate 10, and the front end of the sliding upper mold 2 can bend one side of the straight plate 10. However, the degree of bending is small, that is, the angle between the web 201 and the corresponding flange is greater than α. Subsequently, during the sliding process of the sliding upper mold 2 relative to the fixed lower mold 1, the rear end of the sliding upper mold 2 contacts the straight plate 10, causing the straight plate 10 to continue to bend, thereby making the angle between the web 201 and the corresponding flange of the formed C-shaped beam 20 equal to α, so as to complete the processing. Optionally, in this embodiment, the included angle between the first molding surface 21 and the second molding surface 22 gradually decreases along the direction from the front end to the rear end of the sliding upper mold 2.
[0027] Continue to refer to Figures 6-10 Along the direction from the front end to the rear end of the sliding upper mold 2, the width of the second forming surface 22 gradually increases, so that when the front end of the sliding upper mold 2 contacts the straight plate 10, the contact area between the front end of the second forming surface 22 and the straight plate 10 is small, which allows the straight plate 10 to undergo pre-deformation. Subsequently, when the rear end of the sliding upper mold 2 contacts the straight plate 10, the contact area between the rear end of the second forming surface 22 and the straight plate 10 is large, so that the straight plate 10 can be fully deformed.
[0028] Reference Figures 1-14 The fixed lower mold 1 has a specific shape, having a third forming surface 11 and a fourth forming surface 12 and a fifth forming surface 13 located on both sides of the third forming surface 11. The third forming surface 11 is used to support the straight plate 10. During the sliding upper mold 2 sliding in the forward direction relative to the fixed lower mold 1, the first forming surface 21 and the third forming surface 11 are respectively in contact with the two side surfaces of the straight plate 10. The second forming surface 22 can bend one side of the straight plate 10 to form a first wing plate 202, and the second forming surface 22 and the fourth forming surface 12 are respectively located on both sides of the first wing plate 202. During the sliding upper mold 2 sliding in the reverse direction relative to the fixed lower mold 1, the first forming surface 21 and the third forming surface 11 are respectively in contact with the two side surfaces of the straight plate 10. The second forming surface 22 can bend the other side of the straight plate 10 to form a second wing plate 203, and the second forming surface 22 and the fifth forming surface 13 are respectively located on both sides of the second wing plate 203.
[0029] Continue to refer to Figures 1-14The included angles between the third forming surface 11 and the fourth forming surface 12, and between the third forming surface 11 and the fifth forming surface 13, are both α, so that after the C-shaped beam 20 is processed and formed, the fourth forming surface 12 fits with the first wing plate 202, and the fifth forming surface 13 fits with the second wing plate 203.
[0030] Continue to refer to Figures 1-14 The web 201 and the first flange 202, as well as the web 201 and the second flange 203 of the C-shaped beam 20 to be processed, all have rounded corners. Correspondingly, the first forming surface 21 and the second forming surface 22, the third forming surface 11 and the fourth forming surface 12, and the third forming surface 11 and the fifth forming surface 13 all have rounded corners.
[0031] This embodiment also provides a C-beam processing method for processing a straight plate 10 into a C-beam 20, and the C-beam processing method is implemented by the above-mentioned C-beam processing fixture.
[0032] Reference Figure 15 The C-beam fabrication method includes the following steps.
[0033] S100: Based on the design dimensions of each part of the C-shaped beam 20 to be processed, determine the design dimensions of the straight plate 10, and process the straight plate 10.
[0034] In this embodiment, the C-beam 20 is a variable cross-section C-beam. In the variable cross-section C-beam, the width of one end of the web 201 is... The width of the other end is , The widths of the first wing plate 202 and the second wing plate 203 are both The thickness of the C-shaped beam 20 is t. The included angle between the web 201 and the first flange 202 and the designed included angle between the web 201 and the second flange 203 are both α. The web 201 and the first flange 202 and the web 201 and the second flange 203 both have rounded corners, and the radius of the rounded corners is r.
[0035] In step S100, determining the design dimensions of the straight plate 10 based on the design dimensions of each part of the C-shaped beam 20 to be processed includes the following steps.
[0036] Calculate the length of the 20mm fillet area of the C-beam. ,in, .
[0037] The formula references the formula for calculating the arc length of a sector and uses the sum of half the thickness of the C-beam 20 and the radius of the fillet as the calculation radius.
[0038] Calculate the width of the straight plate 10. ,in, .
[0039] The wide side of the straight plate 10 includes the wider end of the web plate 201, the first wing plate 202, the second wing plate 203, and two rounded corners. Therefore, the length of the wide side of the straight plate 10 can be obtained by adding them together.
[0040] Calculate the narrow side length of the straight plate 10 ,in, .
[0041] The narrow side of the straight plate 10 includes the narrower end of the web 201, the first wing 202, the second wing 203, and two rounded corners. Therefore, the length of the narrow side of the straight plate 10 can be obtained by adding them together.
[0042] In addition, the length of the straight plate 10 should be consistent with the length of the C-beam 20. In this embodiment, the length of the C-beam 20 is L, therefore, the length of the straight plate 10 is also L.
[0043] S200: Place the straight plate 10 on the fixed lower mold 1 and fix the straight plate 10 relative to the fixed lower mold 1.
[0044] S300: Control the sliding upper mold 2 to slide in the forward direction relative to the fixed lower mold 1 to form the first wing plate 202, and control the sliding upper mold 2 to slide in the reverse direction relative to the fixed lower mold 1 to form the second wing plate 203.
[0045] This C-beam processing method achieves the integral forming of the C-beam 20 in a progressive manner, without intermediate connecting structures, and can effectively reduce the cost of clause verification and improve the maintainability and inspectability of parts.
[0046] Optionally, the C-beam fabrication method may also include the following steps following step S300.
[0047] S400: Measure the size of the first included angle between the web 201 and the first flange 202 of the formed C-shaped beam 20, and calculate the difference between the first included angle and α; measure the size of the second included angle between the web 201 and the second flange 203 of the formed C-shaped beam 20, and calculate the difference between the second included angle and α.
[0048] S500: Compare the difference between the first included angle and α with the preset difference, and compare the difference between the second included angle and α with the preset difference.
[0049] If the difference between the first included angle and α does not exceed the preset difference, and the difference between the second included angle and α does not exceed the preset difference, then the processing of the C-shaped beam 20 is completed; if the difference between the first included angle and α exceeds the preset difference, or the difference between the second included angle and α exceeds the preset difference, then return to step S300.
[0050] After step S300, the above steps can be used to detect whether the C-beam 20 has been processed into shape. This mainly involves determining whether the first included angle between the web 201 and the first flange 202 of the C-beam 20 and the second included angle between the web 201 and the second flange 203 of the C-beam 20 meet the requirements.
[0051] In step S500, if the difference between the first included angle and α does not exceed a preset difference, and the difference between the second included angle and α does not exceed a preset difference, it indicates that the actual sizes of the first and second included angles are close to the designed included angle α, and it can be determined that the C-beam 20 has been processed. If the difference between the first included angle and α exceeds a preset difference, or the difference between the second included angle and α exceeds a preset difference, it indicates that the actual size of the first included angle or the actual size of the second included angle deviates significantly from the designed included angle α. Therefore, the process returns to step S300, and the sliding upper mold 2 is controlled to slide in the positive direction relative to the fixed lower mold 1 again, and the sliding upper mold 2 is controlled to slide in the negative direction relative to the fixed lower mold 1 again, and the actual sizes of the two included angles of the C-beam 20 are checked again to see if they meet the requirements.
[0052] The above description is merely a preferred embodiment of the present invention and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of disclosure in this invention is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-disclosed concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this invention.
Claims
1. A C-beam machining fixture, characterized in that, Used to process a straight plate (10) into a C-shaped beam (20), the C-shaped beam (20) includes a web (201) and a first flange (202) and a second flange (203) located on both sides of the web (201); The C-beam processing fixture includes a fixed lower mold (1) and a sliding upper mold (2). The outer surface of the fixed lower mold (1) is C-shaped and adapted to the shape of the C-beam (20). The sliding upper mold (2) has a first forming surface (21) and a second forming surface (22) set at an angle. The fixed lower mold (1) is used to support the straight plate (10). The sliding upper mold (2) can slide relative to the fixed lower mold (1) in a forward or reverse direction. During the sliding process, the first forming surface (21) is always in contact with the straight plate (10), and the second forming surface (22) can bend one side of the straight plate (10) to form the first wing plate (202); during the sliding process of the upper sliding mold (2) relative to the lower fixed mold (1) in the opposite direction, the first forming surface (21) is always in contact with the straight plate (10), and the second forming surface (22) can bend the other side of the straight plate (10) to form the second wing plate (203).
2. The C-beam machining fixture according to claim 1, characterized in that, The included angle between the web plate (201) and the first wing plate (202) and the included angle between the web plate (201) and the second wing plate (203) are both α. The sliding upper mold (2) has a front end and a rear end. The included angle between the rear end of the first forming surface (21) and the rear end of the second forming surface (22) of the sliding upper mold (2) is α. The included angle between the front end of the first forming surface (21) and the front end of the second forming surface (22) of the sliding upper mold (2) is greater than α.
3. The C-beam machining fixture according to claim 2, characterized in that, Along the direction from the front end to the rear end of the sliding upper mold (2), the width of the second forming surface (22) gradually increases.
4. The C-beam machining fixture according to claim 1, characterized in that, The fixed lower mold (1) has a third forming surface (11) and a fourth forming surface (12) and a fifth forming surface (13) located on both sides of the third forming surface (11). The third forming surface (11) is used to support the straight plate (10). During the forward sliding of the sliding upper mold (2) relative to the fixed lower mold (1), the first forming surface (21) and the third forming surface (11) are respectively in contact with the two side surfaces of the straight plate (10). The second forming surface (22) can bend one side of the straight plate (10) to form the first wing plate (202). The second forming surface (22) and the fourth forming surface (12) are located on both sides of the first wing plate (202); during the process of the sliding upper mold (2) sliding in the opposite direction relative to the fixed lower mold (1), the first forming surface (21) and the third forming surface (11) are respectively attached to the two side surfaces of the straight plate (10), and the second forming surface (22) can bend the other side of the straight plate (10) to form the second wing plate (203), and the second forming surface (22) and the fifth forming surface (13) are located on both sides of the second wing plate (203).
5. The C-beam machining fixture according to claim 4, characterized in that, The angle between the third molding surface (11) and the fourth molding surface (12) and the angle between the third molding surface (11) and the fifth molding surface (13) are both α.
6. The C-beam machining fixture according to claim 4, characterized in that, The web plate (201) and the first wing plate (202) and the web plate (201) and the second wing plate (203) are both rounded; the first molding surface (21) and the second molding surface (22), the third molding surface (11) and the fourth molding surface (12) and the third molding surface (11) and the fifth molding surface (13) are both rounded.
7. A method for processing C-shaped beams, characterized in that, The method is used to process a straight plate (10) into a C-beam (20), the C-beam (20) including a web (201) and a first flange (202) and a second flange (203) respectively located on both sides of the web (201); the C-beam processing method is implemented by the C-beam processing fixture as described in any one of claims 1-6; The C-beam fabrication method includes: S100: Based on the design dimensions of each part of the C-shaped beam (20) to be processed, determine the design dimensions of the straight plate (10) and process the straight plate (10). S200: Place the straight plate (10) on the fixed lower mold (1) and fix the straight plate (10) relative to the fixed lower mold (1); S300: Control the sliding upper mold (2) to slide in the forward direction relative to the fixed lower mold (1) to form the first wing plate (202), and control the sliding upper mold (2) to slide in the reverse direction relative to the fixed lower mold (1) to form the second wing plate (203).
8. The C-beam processing method according to claim 7, characterized in that, The included angle between the web (201) and the first wing (202) and the included angle between the web (201) and the second wing (203) are both α. The C-beam fabrication method also includes the following steps after step S300: S400: Measure the size of the first included angle between the web (201) and the first flange (202) of the formed C-beam (20), and calculate the difference between the first included angle and α; Measure the size of the second included angle between the web (201) and the second flange (203) of the formed C-beam (20), and calculate the difference between the second included angle and α; S500: Compare the difference between the first included angle and α with a preset difference, and compare the difference between the second included angle and α with a preset difference; If the difference between the first included angle and α does not exceed the preset difference, and the difference between the second included angle and α does not exceed the preset difference, then the processing of the C-shaped beam (20) is determined to be completed.
9. The C-beam processing method according to claim 8, characterized in that, In step S500, if the difference between the first included angle and α exceeds the preset difference, or the difference between the second included angle and α exceeds the preset difference, then return to step S300.
10. The C-beam processing method according to claim 7, characterized in that, The C-beam (20) is a variable cross-section C-beam, wherein the width of one end of the web (201) of the variable cross-section C-beam is... The width of the other end is , The widths of the first wing plate (202) and the second wing plate (203) are both The thickness of the C-shaped beam (20) is t, the included angle between the web (201) and the first flange (202) and the designed included angle between the web (201) and the second flange (203) are both α, the web (201) and the first flange (202) and the web (201) and the second flange (203) are both rounded, and the radius of the rounded corners is r. In step S100, determining the design dimensions of the straight plate (10) based on the design dimensions of each part of the C-shaped beam (20) to be processed includes: Calculate the length of the rounded corner area of the C-shaped beam (20). ,in, ; Calculate the length of the wide side of the straight plate (10). ,in, ; Calculate the narrow side length of the straight plate (10). ,in, .