Flangeless Forming Method for Thin-Wall Metal Sheet Metal Components

Abstract

The invention belongs to the technical field of forming and manufacturing thin-walled metal components, and provides a flangeless forming method for thin-walled metal sheet metal components. The steps are as follows: design of original blanks; determination and preparation of clad slabs; laminated slabs The combination of the mold; the sealing of the mold; the forming of the laminated slab; the discharge of the pressure medium; the decomposition of the laminated slab; the post-treatment of the thin-walled member. In the present invention, when the laminated slab is formed, the original slab does not need a flange area, and for materials with poor plastic formability, it avoids the occurrence of wrinkling defects caused by local bulging, local thinning, local cracking or uneven distribution of interface materials question. In addition, the original slab does not need a flange area when the laminated slab is formed in the present invention, especially when forming a thin-walled metal member with a large size, it can solve the problem that the outer dimension of the required original slab exceeds the preparation of the existing slab Ability issue.

Description

technical field

[0001] The invention belongs to the technical field of forming and manufacturing thin-walled metal components, in particular to a flangeless forming method for thin-walled metal sheet metal components. Background technique

[0002] Thin-walled metal sheet metal components are a very common type of structural parts in the aerospace field and in vehicles, high-speed rail and other transportation equipment. According to the service requirements of thin-walled metal sheet metal components such as tensile strength, external dimensions, corrosion resistance, etc., it is first necessary to select the material of the component and optimize the design of the shape and size. Then, select a suitable metal slab, and use a suitable forming method to manufacture the required thin-walled metal sheet metal components. The shape, size, wall thickness distribution, and mechanical properties of the formed thin-walled metal sheet metal components must meet the design requiremen...

Examples

Embodiment 1

[0030] Example 1: Combining figure 1 , figure 2 , image 3 ,Figure 4, Figure 5 , Figure 6 Illustrate, the non-flange forming method of the thin-walled metal sheet metal component that the present invention proposes, this method is to carry out according to the following steps:

[0031] The invention provides a flangeless forming method of a thin-walled metal sheet metal member, comprising the following steps:

[0032] Step 1, the design of the original blank. Carry out feature analysis on thin-walled metal components, and determine the material and outline dimensions of the original slab required by theoretical calculation or simulation methods. Since the forming of the original slab does not require a flange area, the size of the original slab is selected It is consistent with the maximum cross-sectional size of the parting surface of the mold, and then it is prepared by cutting with a blank cutting machine or punching through a blanking die;

[0033] Step 2: Determi...

Embodiment 2

[0041] Example 2: Combining figure 1 Note that in step 1, the selected original slab is made of 5A06 aluminum alloy with a thickness of 2mm and a circle with a diameter of 150mm for the outer dimensions. Other steps are the same as in embodiment 1.

[0042] The beneficial effects of this embodiment are: the 5A06 aluminum alloy has high specific strength, strong corrosion resistance and good weldability, and is widely used in parts such as fairings and fuel storage tanks in aviation and aerospace fields.

Embodiment 3

[0043] Example 3: Binding figure 2 Note that in step 2, the material of the upper cladding slab and the lower cladding slab is 1Cr18Ni9Ti stainless steel plate with a thickness of 1mm, and a circle with a diameter of 200mm is selected as the outer dimension. The other steps are the same as in Example 1.

[0044] The beneficial effects of this embodiment are: 1Cr18Ni9Ti has good overall performance, high plasticity and toughness, and its elongation, reduction of area and impact value are all high, and the elongation of 1Cr18Ni9Ti is 40%. Through the upper and lower stainless steel clad slabs , reducing the two-way tensile stress at the top and bottom of the original slab, reducing the stress and strain gradients in the deformation zone of the original slab, and making the stress and strain distribution in the entire bulging zone more uniform, thereby making the bulging deformation more uniform.

technical field

[0001] The invention belongs to the technical field of forming and manufacturing thin-walled metal components, in particular to a flangeless forming method for thin-walled metal sheet metal components. Background technique

[0002] Thin-walled metal sheet metal components are a very common type of structural parts in the aerospace field and in vehicles, high-speed rail and other transportation equipment. According to the service requirements of thin-walled metal sheet metal components such as tensile strength, external dimensions, corrosion resistance, etc., it is first necessary to select the material of the component and optimize the design of the shape and size. Then, select a suitable metal slab, and use a suitable forming method to manufacture the required thin-walled metal sheet metal components. The shape, size, wall thickness distribution, and mechanical properties of the formed thin-walled metal sheet metal components must meet the design requiremen...

Examples

Embodiment 1

[0030] Example 1: Combining figure 1 , figure 2 , image 3 ,Figure 4, Figure 5 , Figure 6 Illustrate, the non-flange forming method of the thin-walled metal sheet metal component that the present invention proposes, this method is to carry out according to the following steps:

[0031] The invention provides a flangeless forming method of a thin-walled metal sheet metal member, comprising the following steps:

[0032] Step 1, the design of the original blank. Carry out feature analysis on thin-walled metal components, and determine the material and outline dimensions of the original slab required by theoretical calculation or simulation methods. Since the forming of the original slab does not require a flange area, the size of the original slab is selected It is consistent with the maximum cross-sectional size of the parting surface of the mold, and then it is prepared by cutting with a blank cutting machine or punching through a blanking die;

[0033] Step 2: Determi...

Embodiment 2

[0041] Example 2: Combining figure 1 Note that in step 1, the selected original slab is made of 5A06 aluminum alloy with a thickness of 2mm and a circle with a diameter of 150mm for the outer dimensions. Other steps are the same as in embodiment 1.

[0042] The beneficial effects of this embodiment are: the 5A06 aluminum alloy has high specific strength, strong corrosion resistance and good weldability, and is widely used in parts such as fairings and fuel storage tanks in aviation and aerospace fields.

Embodiment 3

[0043] Example 3: Binding figure 2 Note that in step 2, the material of the upper cladding slab and the lower cladding slab is 1Cr18Ni9Ti stainless steel plate with a thickness of 1mm, and a circle with a diameter of 200mm is selected as the outer dimension. The other steps are the same as in Example 1.

[0044] The beneficial effects of this embodiment are: 1Cr18Ni9Ti has good overall performance, high plasticity and toughness, and its elongation, reduction of area and impact value are all high, and the elongation of 1Cr18Ni9Ti is 40%. Through the upper and lower stainless steel clad slabs , reducing the two-way tensile stress at the top and bottom of the original slab, reducing the stress and strain gradients in the deformation zone of the original slab, and making the stress and strain distribution in the entire bulging zone more uniform, thereby making the bulging deformation more uniform.

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