A kind of hollow blade viscoelastic plastic soft mold internal pressure forming method and forming device

A hollow vane and viscoelastic technology, which is applied in the field of hollow parts forming, can solve the problems of poor wall thickness uniformity, low dimensional accuracy, and complicated process, and achieve high forming dimensional accuracy, good wall thickness uniformity, and simple forming process. Effect

Active Publication Date: 2019-04-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of the hollow blade processed by the existing method, the technological process is complicated, the dimensional accuracy is low, the wall thickness is seriously thinned, and the wall thickness uniformity is poor, a hollow blade viscoelastic-plastic soft mold internal pressure forming method and forming method are proposed. device

Method used

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  • A kind of hollow blade viscoelastic plastic soft mold internal pressure forming method and forming device
  • A kind of hollow blade viscoelastic plastic soft mold internal pressure forming method and forming device
  • A kind of hollow blade viscoelastic plastic soft mold internal pressure forming method and forming device

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specific Embodiment approach 1

[0021] Specific implementation mode one: combine Figure 1 to Figure 5 Describe this implementation mode, this implementation mode is realized through the following steps:

[0022] Step 1. Blank making 1: Rolling and welding the sheet metal to form a circular shell, and processing the fixed sections 1-2 at both ends of the circular shell into a diameter larger than that of the middle airfoil section 1-1, and the airfoil section 1-2 1 and the fixed section 1-2 is the transition section 1-3, see figure 1 ;

[0023] Step 2: Install the tube blank 1 into the sealing device 2: put the tube blank 1 into the sealing device 2, and clamp and fix the tube blank 1;

[0024] Step 3: Install the sealing device 2 into the press: install the sealing device 2 with the tube blank 1 on the press, align with the upper mold 4 and the lower mold 5, and position;

[0025] Step 4: Inject viscoelastic plastic material 3: inject viscoelastic plastic material 3 into the shell 1, and at the same time...

specific Embodiment approach 2

[0029] Specific implementation mode two: combination figure 1 This embodiment will be described. In this embodiment, the wall thickness of the shell blank 1 in step 1 is 0.15 mm to 1 mm. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0030] Specific implementation mode three: combination figure 1 To describe this embodiment, in this embodiment, the material of the shell blank 1 in step 1 is stainless steel, titanium alloy or superalloy. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to an internal pressure forming method and device for a hollow blade through a visco-elastic plastic soft mold in order to solve the problems that hollow blades machined through existing methods are complex in technological process, low in dimensional accuracy, severe in wall thickness reduction and poor in wall thickness uniformity. The method includes the steps that firstly, a barrel blank is made; secondly, the barrel blank is put into a sealing device; thirdly, the sealing device is arranged on a press machine and aligned with an upper mold and a lower mold; fourthly, visco-elastic plastic materials are injected; fifthly, mold assembly forming is conducted; sixthly, the molds are opened, and a formed part is obtained; and seventhly, a technologically supplemented part is cut off, and the finished hollow blade is obtained. According to the device, a fixing frame is a four-body frame, stepped holes are formed in any two opposite frame bodies of the fixing frame, each stepped hole sequentially comprises an overflow valve mounting hole and a barrel blank mounting hole from outside to inside, the two stepped holes are symmetrically arranged relative to the barrel blank, each overflow valve mounting hole is provided with an overflow valve, the upper mold and the lower mold are arranged at the upper end and the lower end of the barrel blank respectively, and a closed cavity is arranged between the upper mold and the lower mold. The method and device are used for manufacturing the hollow blade.

Description

technical field [0001] The invention relates to a soft mold internal pressure forming method and a forming device, in particular to a hollow vane viscoelastic-plastic soft mold internal pressure forming method and forming device, belonging to the technical field of hollow part forming. Background technique [0002] The blade is the core component inside the aero-engine. It works under the condition of high temperature and high-speed gas impact. In order to reduce the temperature of the blade material, the blade is usually made hollow and cooled by air inside. Dimensional accuracy, surface quality and wall thickness uniformity are the most important attributes of hollow blades. At present, the forming methods used for such hollow blades are mainly casting forming, wax filling forming, split stamping and then butt welding. Casting requires complicated mechanical processing and electrical processing, and finally polished. The processing technology is complex and the size of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D26/00B21D53/78
CPCB21D26/00B21D53/78
Inventor 王忠金冯业坤
Owner HARBIN INST OF TECH
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