Bending forming method of grid conical wall plate

Abstract

The invention discloses a bending forming method of a grid conical wallboard, which comprises the following steps: S1, calculating an unfolded blank, and adding process allowance on the periphery to form an unfolded shape of a part; s2, machining a grid and a peripheral process table to form a part unfolding semi-finished product; s3, designing and manufacturing a lineation sample plate and a profile detection sample plate; s4, lineation is conducted at the large end and the small end of the unfolded semi-finished product of the part through the lineation sample plate, and bending is conducted along lineation; s5, timely detecting the sample plate by using a molded surface in the bending process; and S6, shaping according to a sample plate detection result. The bending machine is used for forming, and the equipment requirement and cost are reduced; different sample plates are designed, and the bending line and the pressing amount are adjusted, so that the forming requirements of the grid conical wall plates with different tapers can be met; process allowance is added around the unfolded blank, material use is optimized, and meanwhile it is ensured that accurate bending is conducted according to a lineation sample plate; a special sample plate is adopted for scribing and radian detection, and the bending forming precision of the grid conical wall plate is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of bending and forming of commercial aerospace products, and in particular relates to a bending and forming method of a grid conical wall panel. Background Art

[0002] The conical wall panel is made of aluminum alloy with radial grids on the outer surface and inconsistent wall thickness. The usual processing method is to use special rolling equipment for rolling and then machine the grid. Special rolling equipment and special molds are required, and the mold surface must be consistent with the conical surface requirements of the part. The production cycle is long and the manufacturing cost is high. It is not suitable for the needs of developing a small number of products with a short cycle. Summary of the invention

[0003] The purpose of the present invention is to realize the forming of grid cone wall panel parts by using a bending machine without special equipment and molds. In order to solve the above technical problems, the present invention provides a bending forming method of grid cone wall panel.

[0004] A method for bending and forming a grid conical wall panel comprises the following steps:

[0005] S1: Calculate the unfolded blank according to the part size, and add process allowance around the unfolded blank to form the unfolded shape of the part;

[0006] S2: Machining grid and surrounding process table to form a semi-finished product of parts;

[0007] S3: Design and make marking templates and surface inspection templates;

[0008] S4: Use a marking template to mark the large end and small end of the unfolded semi-finished part, and bend along the marking lines;

[0009] S5: Use the profile test sample in time during the bending process, and adjust the pressure according to the test results to ensure that the curvature and angle meet the design requirements;

[0010] S6: Shape according to the sample inspection results to ensure the gap between the upper and lower sample and the mold surface.

[0011] As a preferred embodiment, the number of the marking templates in S3 is two, namely a small-end marking template and a large-end marking template, and the materials are thin steel plates or thin aluminum plates.

[0012] As a preferred embodiment, the number of the profile detection templates in S3 is two, namely a small-end profile detection template and a large-end profile detection template, and the materials are thin steel plates or thin aluminum plates.

[0013] Further preferably, the small end profile detection template is composed of a small end curvature template and a small end angle template.

[0014] Further preferably, the large end profile detection template is composed of a large end curvature template and a large end angle template.

[0015] Further preferably, the curvature and angle design of the profile detection template conforms to the curvature radius and cone angle of the large end and the small end of the conical wall panel to meet the corresponding wall panel processing requirements.

[0016] Beneficial effects of the present invention:

[0017] The present invention utilizes a bending machine for forming, replacing special rolling bending equipment, reducing equipment requirements and costs; by designing different templates, adjusting the bending line and the amount of downward pressure, it can adapt to the forming requirements of grid conical wall panels with different tapers without the need for additional equipment; increasing the process margin around the unfolded blank optimizes the use of materials while ensuring precise bending according to the marked template; using special templates for marking and detecting the curvature enhances the accuracy of the bending forming of the grid conical wall panels. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Attached Figure 1 It is a schematic diagram of the parts structure;

[0019] Attached Figure 2 It is a schematic diagram of the part blank expansion;

[0020] Attached Figure 3 Add actual expansion of process allowance for parts;

[0021] Attached Figure 4 This is a schematic diagram of the marking template;

[0022] Attached Figure 5 This is a schematic diagram of the surface inspection sample;

[0023] Attached Figure 6 Schematic diagram of semi-finished parts inspection.

[0024] In the figure, the generatrix length L, the radius of the small end of the part R1, the radius of the large end of the part R2, the angle α between the side wall of the part and the bottom plane, the thickness of the peripheral area of ​​the part H1, the thickness of the area inside the part grid H2, the thickness of the part grid rib H3, the small end marking template 1, the large end marking template 2, the small end profile detection template 3, the small end curvature template 31, the small end angle template 32, the large end profile detection template 4, the large end curvature template 41, the large end angle template 42, the small end profile detection template radius R1', the large end profile detection template radius R2', and the detection angle α'. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the embodiments of the present invention are given below, and the present invention is described in detail through the embodiments. It is necessary to point out that the embodiments are only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Those skilled in the art in this field can make some non-essential improvements and adjustments based on the content of the present invention.

[0026] Embodiment 1:

[0027] like Figure 1-Figure 6 As shown, a bending forming method of a grid cone wall panel comprises the following steps:

[0028] S1: Calculate the unfolded blank according to the part size, and add process allowance around the unfolded blank to form the unfolded shape of the part; the part is conical, with a generatrix length of L, a small end radius of R1, a large end radius of R2, and radial ribs arranged on the outer surface to form a grid. The part has three different thicknesses, including peripheral area thickness H1, grid inner area thickness H2, and grid rib thickness H3. The peripheral area thickness H1 is less than the grid inner area thickness H2 and the grid rib thickness H3; the thickness at the process allowance is the same as the grid rib thickness H3;

[0029] S2: Machining grid and surrounding process table to form a semi-finished product of parts;

[0030] S3: Design and make marking templates and surface inspection templates;

[0031] S4: Use a marking template to mark the large end and small end of the unfolded semi-finished part, and bend along the marking lines;

[0032] S5: Use the profile test sample in time during the bending process, and adjust the pressure according to the test results to ensure that the curvature and angle meet the design requirements;

[0033] S6: Shape according to the sample inspection results to ensure the gap between the upper and lower sample and the mold surface.

[0034] There are two marking templates in S3, namely, a small-end marking template and a large-end marking template. The material is a thin steel plate or a thin aluminum plate, and there are marking notches. The position of the notch is according to the center line of the rib. When in use, align the unfolded shape of the part, and draw the bending line at the small end and the large end of the unfolded blank according to the notch.

[0035] There are two surface detection templates in S3, namely small-end surface detection template 3 and large-end surface detection template 4, which are made of thin steel plates or thin aluminum plates. The small-end surface detection template is composed of a small-end curvature template and a small-end angle template, and the large-end surface detection template is composed of a large-end curvature template and a large-end angle template, which are used to detect the curvature and taper of the large and small ends of parts; the curvature and angle design of the surface detection template conforms to the curvature radius and cone angle of the large and small ends of the tapered wall panel to meet the corresponding wall panel processing requirements, that is, R1=R1', R2=R2', α=α'.

[0036] It should be noted that the embodiments described are intended to help readers understand the principles of the present invention, and it should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. A person skilled in the art can make various other specific variations and combinations that do not deviate from the essence of the present invention based on the technical inspiration disclosed by the present invention, and these variations and combinations are still within the protection scope of the present invention.

Claims

1. A method for bending and forming a grid cone wall panel, characterized in that: The steps include: S1: Calculate the unfolded blank according to the part size, and add process allowance around the unfolded blank to form the unfolded shape of the part; S2: Machining grid and surrounding process table to form a semi-finished product of parts; S3: Design and make marking templates and surface inspection templates; S4: Use a marking template to mark the large end and small end of the unfolded semi-finished part, and bend along the marking lines; S5: Use the profile test sample in time during the bending process, and adjust the pressure according to the test results to ensure that the curvature and angle meet the design requirements; S6: Shape according to the sample inspection results to ensure the gap between the upper and lower sample and the mold surface.

2. The bending forming method of a grid cone wall panel according to claim 1, characterized in that: There are two marking templates in S3, namely a small-end marking template and a large-end marking template, and the materials are thin steel plates or thin aluminum plates.

3. The bending forming method of a grid cone wall panel according to claim 1, characterized in that: There are two profile detection samples in S3, namely a small-end profile detection sample and a large-end profile detection sample, and the materials are thin steel plates or thin aluminum plates.

4. The bending forming method of a grid cone wall panel according to claim 3, characterized in that: The small end profile detection template is composed of a small end curvature template and a small end angle template.

5. The bending forming method of a grid cone wall panel according to claim 3, characterized in that: The large end profile detection template is composed of a large end curvature template and a large end angle template.

6. The method for bending and forming a grid cone wall panel according to claim 3, characterized in that: The curvature and angle design of the profile detection template conforms to the curvature radius and cone angle of the large end and the small end of the conical wall panel to meet the corresponding wall panel processing requirements.

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