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Non-uniform pressure field test device and test method in viscous medium pressure forming

A viscous medium and testing device technology, applied in metal processing, metal processing equipment, manufacturing tools, etc., can solve the problems of difficulty in testing large diameter ratio thin-walled instability and wrinkling and wrinkle elimination, saving research funds, using The method is fast and convenient, and the effect of avoiding waste

Active Publication Date: 2016-06-22
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a non-uniform pressure field test device and test method in viscous medium pressure forming, so as to solve the problem that existing methods and devices are difficult to test in the necking process of thin-walled or ultra-thin-walled pipes with large diameter reduction ratio. The deformation behavior of wrinkling and wrinkle elimination under the action of a non-uniform velocity field and pressure field, and each mold device can only test the influence of one loading method on the non-uniform pressure field on the surface of the shell.

Method used

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  • Non-uniform pressure field test device and test method in viscous medium pressure forming
  • Non-uniform pressure field test device and test method in viscous medium pressure forming
  • Non-uniform pressure field test device and test method in viscous medium pressure forming

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specific Embodiment approach 1

[0033] Specific implementation mode one: combine figure 1 , figure 2 , image 3 and Figure 4 This embodiment is described. In this embodiment, the non-uniform pressure field test device in the viscous medium pressure forming includes a medium chamber 1, an upper clamp cover body 2, a core mold 3, a first pressure sensor 4, a pressure control valve 5, a viscous medium 6 and A plurality of pistons 7, the medium bin 1 is vertically arranged, the upper end of the media bin 1 is provided with an upper clamping cover body 2, and the upper clamping cover body 2 is processed with a vertically arranged insertion hole 2-1, so A vertical medium injection channel 1-1 is processed in the medium bin 1, the insertion hole 2-1 communicates with the medium injection channel 1-1, and the core mold 3 is located in the medium injection channel 1-1 and is connected to the medium injection channel 1-1. The medium injection channel 1-1 is set at a gap, and the medium chamber 1 is also processed...

specific Embodiment approach 2

[0037] Specific implementation mode two: combination figure 1 , figure 2 , image 3 and Figure 4 Describe this embodiment. In this embodiment, the medium chamber 1 is a pressure-resistant cavity processed from die steel, etc., the inner diameter of the medium chamber 1 is Φ, the height of the medium chamber 1 is H, and the The value range of the inner diameter Φ is 100mm-300mm, and the value range of the height H is 100mm-500mm. The specific size of the medium bin 1 in this embodiment can be set according to specific experimental requirements and experimental conditions. Other components and connections are the same as those in the first embodiment.

[0038] In this embodiment, the tube blank 9 has a thickness ranging from 0.1mm to 1.5mm, a length of 100mm to 400mm, and a diameter of 80mm to 200mm, which is made of nickel-based superalloy, iron-based superalloy, aluminum alloy, titanium alloy, Made of stainless steel, magnesium alloy, magnesium-lithium alloy or Ni3Al al...

specific Embodiment approach 3

[0039] Specific implementation mode three: combination figure 1 , figure 2 , image 3 and Figure 4 To illustrate this embodiment, in this embodiment, a group of piston passage holes is evenly distributed on the same height of the medium chamber 1, and the number of each group of piston passage holes is 4 to 16, and each piston passage hole 1-2 The hole diameter is 5mm ~ 10mm. The piston channel hole 1-2 set in this way is easy to process, and the experimental effect is easy to quantify and convenient to calculate. Other compositions and connections are the same as those in Embodiments 1 and 2.

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Abstract

The invention discloses a device and a method for testing a non-uniform pressure field of a viscous medium during pressure forming, and relates to a test device and a test method. The invention aims to solve the problems that the existing method and device cannot easily test deformation behaviors of instability wrinkling and wrinkle elimination under the action of various non-uniform velocity fields and pressure fields during necking of a large-diameter-ratio thin-wall or ultrathin-wall pipe, and each mold device can only test the influence of one loading mode on the non-uniform pressure field on the surface of a cylinder blank each time. The device disclosed by the invention is reasonable in structural design and is comprehensive and accurate in test data. The test method comprises the following steps: injecting the viscous medium by multiple pistons at different speeds; measuring the injection pressure in real time by virtue of a pressure sensor; and controlling the injection pressure of the viscous medium by virtue of reciprocating of the pistons to form multiple non-uniform pressure fields and velocity fields in a medium cabin so as to ensure that a pipe blank is subjected to necking deformation under different conditions. The device and the method disclosed by the invention are used for researching the influence of a loading mode of the viscous medium on pressure diameter reduction of a pipe blank viscous medium.

Description

technical field [0001] The invention specifically relates to a non-uniform pressure field test device and a test method in viscous medium pressure forming. Background technique [0002] Viscous Pressure Forming (Viscous Pressure Forming, VPF) is a new sheet metal soft mold forming process, which uses a high-viscosity, flowable semi-solid soft mold (called viscous medium) as the force transmission medium, which can improve the shape and size accuracy of the formed parts, The surface quality and wall thickness distribution uniformity have good application prospects in metal precision plastic forming. For example, parts with ultra-thin wall thickness (0.1-0.3mm), high dimensional accuracy, and fine features of local structural dimensions are important functional parts for new aviation, aerospace and power machinery. Due to the structure, wall thickness, and precision of such parts, it is necessary to ensure better wall thickness uniformity and dimensional accuracy. The control...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C51/00
CPCB21C51/00B21D26/041
Inventor 王忠金宋辉
Owner HARBIN INST OF TECH
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