Forming mold for semi-spherical components and multi-pass forming method

A forming mold and hemispherical technology, applied in forming tools, manufacturing tools, metal processing equipment, etc., can solve the problems of difficult control of deep drawing process parameters, difficult to guarantee shape accuracy, poor product surface quality, etc., and achieve breakthrough forming technology. Bottleneck, save processing cost, eliminate the effect of micro-cracks

Active Publication Date: 2019-11-22
BEIJING HANGXING MACHINERY MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above analysis, the present invention aims to provide a forming die for a hemispherical component and a multi-pass forming method to solve the problem of wrinkling, cracking and deep drawing process of a hemispherical component with a large height-to-diameter ratio in the prior art. Difficult control of parameters, poor uniformity of wall thickness, poor product surface quality, difficult to guarantee shape accuracy, etc.

Method used

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  • Forming mold for semi-spherical components and multi-pass forming method
  • Forming mold for semi-spherical components and multi-pass forming method
  • Forming mold for semi-spherical components and multi-pass forming method

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Embodiment 1

[0053] This embodiment provides a forming die for a hemispherical member, such as Figure 1-Figure 2 As shown, it includes a die 1, a punch 5, a blank holder 4 and a positioning plate 3; the die 1 and the punch 5 are used to form a hemispherical member; , the blank holder 4 cooperates with the die 1 to compress the blank 2, which is used to prevent the blank 2 from being unstable and wrinkled during the forming process; the two adjacent sides of the blank holder 4 are respectively provided with a positioning plate 3, and the positioning plate 3 is used for positioning the upper mold and the lower mold. The positioning plate 3 is screwed to the side of the blank holder 4 and the positioning plate 3 is vertically distributed.

[0054] It also includes an adapter plate 7 for increasing the ejection radius; the lower platform of the forming machine includes the lower jack cylinder and the first ejector rod, but the ejection radius formed by the first ejector rod is small, and the...

Embodiment 2

[0083] Take the 5083 aluminum alloy hemispherical member as an example, its dimensions are shown in figure 1 , the component thickness is 4mm, the aspect ratio is 1.2:1, and the total height is 260mm.

[0084] The specific forming process is carried out as follows:

[0085] Step (1) Determine the size of the blank 2: select the 4mm thick 5083 aluminum alloy raw material plate required for forming, and supplement the margin and process flange edge according to the characteristics of the component, such as figure 2 shown. Using FormingSuite software for numerical simulation, the number of grids is 6900, the material strain hardening index is 0.25, Young's modulus is 70GPa, Poisson's ratio is 0.33, blank holder force is 5t, and drawing force is 200t. Simulate and expand to determine the blanking size as 4×Φ850mm. When blanking, two lugs are added to the relative positions of the blank 2 to facilitate the clamping of the blank 2 when the strong pulse current assists in tissue ...

Embodiment 3

[0093] Taking TA2 pure titanium hemispherical component as an example, its dimensions are shown in figure 1 , the component thickness is 6mm, the aspect ratio is 1.3:1, and the total height is 310mm.

[0094] The specific forming process is carried out as follows:

[0095] Step (1) Determine the size of the blank 2: select the 6mm thick TA2 pure titanium raw material plate required for forming, and supplement the margin and process flange edge according to the characteristics of the component (such as figure 2shown). Using FormingSuite software for numerical simulation, the number of grids is 7800, the material strain hardening index is 0.13, Young's modulus is 103GPa, Poisson's ratio is 0.35, blank holder force is 20t, and drawing force is 400t. Simulate and expand to determine the blanking size as 6×Φ940mm. When blanking, two lugs are added to the relative positions of the blank 2 to facilitate the clamping of the blank 2 when the strong pulse current assists in tissue r...

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Abstract

The invention discloses a forming mold for semi-spherical components and a multi-pass forming method, belongs to the technical field of semi-sphere formation, and solves the problems of corrugation and cracking in deep drawing formation of high-height-diameter-ratio semi-spherical components, difficult control of deep drawing process parameters and weaker wall thickness uniformity in the prior art. The forming mold comprises a concave mold, a convex mold, a blank holder and a positioning plate; the concave mold and the convex mold are used for forming the semi-spherical components; the blank holder is arranged between the concave mold and the convex mold, and is matched with the concave mold to tightly press blanks to prevent corrugations of the blanks in the forming process; the blank holder is provided with a positioning plate; and the positioning plate is used for positioning an upper mold and a lower mold. The forming mold and the forming method are suitable for formation of high-height-diameter-ratio semi-spherical components.

Description

technical field [0001] The invention belongs to the technical field of hemispherical body forming, and in particular relates to a forming die of a hemispherical component and a multi-pass forming method. Background technique [0002] Hemispherical components are widely used in space launch vehicle propulsion systems, satellite covers, pressure vessel heads and other products. According to the different working environments of the hemisphere, its materials are mainly divided into titanium alloy, aluminum alloy, alloy steel and stainless steel. Due to It is mostly used in extreme environments, and has high requirements for pressure resistance, reliability, safety and service life, so its quality control is particularly important. [0003] The hemisphere forming process is mainly spinning forming and cold / hot deep drawing. Spinning process parameters are complex to control, difficult to manufacture, low in accuracy of assembly and adjustment, and high in production costs. Aft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D22/22B21D37/10
CPCB21D22/22B21D37/10
Inventor 徐柄桐秦中环李保永王志敏李信陈海明刘伟刘奇
Owner BEIJING HANGXING MACHINERY MFG CO LTD
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