Tubular product hydraulic forming device capable of achieving inside and outside pressurization

A hydroforming and pipe technology, applied in the field of pipe hydroforming, can solve the problem of simultaneous loading of pipes

Active Publication Date: 2013-09-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem that conventional internal high-pressure forming dies cannot realize the simultaneous loading of internal and ext...

Method used

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  • Tubular product hydraulic forming device capable of achieving inside and outside pressurization
  • Tubular product hydraulic forming device capable of achieving inside and outside pressurization
  • Tubular product hydraulic forming device capable of achieving inside and outside pressurization

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Experimental program
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Effect test

specific Embodiment approach 1

[0036] Specific implementation mode 1: Combination Figure 1 to Figure 10 To explain this embodiment, a pipe hydroforming device that can realize internal and external pressurization in this embodiment includes an upper mold 1, a lower mold 2, an upper template 3, a lower template 4, a left punch 5, and a right punch. The head 6, the upper mold 1 and the lower mold 2 are closed to form a complete mold cavity, which is located between the upper mold 3 and the lower mold 4. The upper mold 3 is connected with the mold upper mold 1, and the lower mold 4 is connected with the mold lower mold. 2Connect. The two ends of the mold cavity are respectively provided with a left punch 5 and a right punch 6; the left punch 5 is provided with a first liquid channel 10 along its axial direction, and the internal pressure booster 8 passes through the first liquid channel 10 is in communication with the inner cavity of the pipe 7, and the pressure intensifier 8 can be filled with liquid medium ...

specific Embodiment approach 2

[0039] Specific embodiment two: Combining embodiment one and Picture 11 To illustrate this embodiment, the difference between this embodiment and the first embodiment is that the first sealing ring 14 between the left punch 5, the right punch 6 and the boss 2-1 of the lower die 2 is set to be more One (at least two), so that a better sealing effect can be achieved, so that the external pressure can reach a greater value. The other components and connection modes are the same as in the first embodiment.

specific Embodiment approach 3

[0040] Specific implementation mode 3: Combining implementation mode 1 and Picture 12 To illustrate this embodiment, the difference between this embodiment and the first embodiment is that the forming device further includes a second sealing ring 16, and the pipe cavity and the left punch are formed at both ends of the upper mold 1 and the lower mold 2. One or more second sealing rings 16 are arranged between the head 5 and the right punch 6 respectively. The second sealing ring 16 is arranged on the punch, and the number of the second sealing rings on the left and right punches depends on the number of punches in the pipe forming process. Depending on the advancement distance of the head, it should be ensured that at least one second sealing ring 16 forms a sealing fit with the boss 2-1 at each moment.

[0041] When the first seal ring on the punch enters the boss 2-1, the external pressure around the punch can be sealed. With the continuous advancement of the left and right pun...

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Abstract

The invention discloses a tubular product hydraulic forming device capable of achieving inside and outside pressurization and relates to a tubular product part forming device. The device solves the difficult problems that a traditional inner high-pressure forming die can achieve tubular product axial feeding but can not achieve tubular product outside pressure sealing, and a whole sealing container can be used for achieving the outside pressure sealing but not achieving the axial feeding. The tubular product hydraulic forming device comprises an upper die of a die, a lower die of the die, an upper template, a lower template, a left side punch and a right side punch, wherein a ring-shaped groove surrounding a cavity of the die is formed in the upper die, a ring-shaped protrusion is formed in the lower die, the groove is in clearance fit with the protrusion, a ring-shaped elastic sealing ring between the groove and the protrusion and a sealing ring among the left side punch, the right side punch and a boss of the lower die jointly ensure the tubular product outside pressure sealing, a die splitting mode that the groove is in clearance fit with the boss is adopted to ensure that no leakage of the tubular product outside pressure happens, under the joint effects of the inside pressure, the outside pressure and the axial feeding, plastic deformation occurs in the tubular product, and formability of the low-plastic tubular product is improved.

Description

Technical field [0001] The invention relates to a pipe hydroforming device that can realize internal and external pressurization. Specifically, a special sealing structure is provided between the upper and lower molds, the left and right punches and the mold to realize the external liquid sealing of the pipe, thereby realizing the internal pressure and external pressure of the pipe. A pipe hydroforming device formed under the combined action of pressure and axial replenishment belongs to the field of pipe hydroforming. Background technique [0002] Lightweight structure is one of the main means to save fuel and reduce exhaust emissions for vehicles such as automobiles and airplanes. Therefore, plastic forming parts with lightweight alloys as blanks have been widely used in aerospace, automotive and other industries. However, compared with traditional low-strength steels, lightweight materials such as aluminum and magnesium alloys have lower formability at room temperature. For ex...

Claims

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Application Information

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IPC IPC(8): B21D26/033B21D26/047
Inventor 王小松刘钢崔晓磊苑世剑
Owner HARBIN INST OF TECH
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