A medium and small-sized internal high pressure forming machine with bulging pressure pulsation loading

A technology of internal high pressure forming and pressure pulsation, which is applied in the direction of fluid pressure actuation devices, fluid pressure actuation system components, mechanical equipment, etc., can solve problems such as the inability to realize pulsation loading, and achieve improved energy utilization efficiency, pressure stability, low cost effect

Active Publication Date: 2018-06-26
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing internal high pressure forming machine can only realize the linear loading of the bulging pressure, but cannot realize the pulsating loading. Combined loading small and medium-sized internal high pressure forming machine with motor-driven hydraulic cylinder piston reciprocating motion to generate pulsating pressure

Method used

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  • A medium and small-sized internal high pressure forming machine with bulging pressure pulsation loading
  • A medium and small-sized internal high pressure forming machine with bulging pressure pulsation loading
  • A medium and small-sized internal high pressure forming machine with bulging pressure pulsation loading

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Embodiment 1

[0035] This embodiment is internal high pressure forming with conventional linear loading of bulging pressure, combined with Figure 1-6 This embodiment will be described.

[0036] A small and medium-sized internal high pressure forming machine with bulging pressure pulsation loading according to the present invention, comprising: an upper beam 1, four guide columns 2, two fast cylinders 3, a main cylinder 4, a movable beam 5, an upper mold 6, two (or three) axial feed cylinder 8 and the same number of punches 7, workbench 9, frame 10, lower die 11, lower cylinder 12, electrical control cabinet 13, PLC (including AD / DA module) 14. Servo driver 15, multiple button switches 16, control panel 17, touch screen 18, low-pressure liquid filling system 19, host hydraulic system 20, system oil pipe 21, booster cylinder 22, pulsation hydraulic pressure generating device 23, high-pressure water pipe 24, pressure Transmitter 25.

[0037] The pulsation hydraulic pressure generating devic...

Embodiment 2

[0055] This embodiment is internal high pressure forming with sinusoidal pulsation loading of bulging pressure, combined with Figure 1-7 This embodiment will be described.

[0056] In this embodiment, the internal pressure loading curve function is:

[0057] P 1 (t)=P 0 (t)+ΔP·sin(2πω·t).

[0058] In the formula, P 0 (t) is the conventional linear loading curve in Example 1, ΔP is the pulse wave amplitude, which is 5 MPa in this embodiment; ω is the pulse frequency, which is 1 Hz in this embodiment.

[0059] Compared with Example 2, the pulsating loading method is selected as 1, and the amplitude h needs to be manually measured before the part is formed. Because the system only feeds back and controls the conventional linearly loaded pressure, the pulsating pressure is partially open-loop controlled, and the input program is the amplitude h of the piston rod of the pulsating cylinder, not the amplitude ΔP of the pulsating pressure. Knowing the hydrodynamic properties of...

Embodiment 3

[0064] This embodiment is internal high pressure forming with rectangular pulsating loading of bulging pressure, combined with Figure 1-9 , Figure 8 This embodiment will be described.

[0065] In this embodiment, the internal pressure loading curve function is:

[0066]

[0067] In the formula, P 0 (t) is the conventional linear loading curve in Example 1, ΔP is the pulse wave amplitude, which is 5 MPa in this embodiment; ω is the pulse frequency, which is 1 Hz in this embodiment.

[0068] Compared with Embodiment 2, the servo motor 49 drives the piston rod 46 to move at the maximum rotational speed in each pulsation period. The piston rod 46 moves quickly from the balance point to the maximum amplitude h, pauses for a period of time, then descends to the position h below the balance point, and quickly returns to the balance point when the pause is the same.

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Abstract

The invention relates to a small and medium-sized internal high-pressure forming machine with pulsating loading of bulging pressure. Firstly, an electro-hydraulic servo valve is used to control the linear pressurization of a booster cylinder, and then a servo motor and a ball screw drive the piston rod of the pulsating cylinder to reciprocate to form pulsating pressure. , does not rely on the pressure change of the main engine system or the reciprocating advance and retreat of the booster cylinder to form a pulsating pressure, avoiding the fluctuation of the system pressure or the unstable state caused by the high-frequency chatter of the booster cylinder; it can realize the conventional linear loading of the bulging pressure during internal high pressure forming , sine wave pulsation loading, triangular wave pulsation loading, rectangular wave pulsation loading, and the combination of the above four methods in different periods of time, and the frequency and amplitude of pressure pulsation can be adjusted within a certain range, which expands the scope of application of the equipment and improves the forming of products. quality.

Description

technical field [0001] The invention relates to an internal high-pressure forming machine, in particular to a medium and small-sized internal high-pressure forming machine loaded with bulging pressure pulses. Background technique [0002] Internal high pressure forming technology is an advanced, special, precise (semi-precision) net forming technology used to produce thin-walled metal components with complex cross-sections. Technology, with the characteristics of low cost, less process, light weight and high strength, is widely used in aviation, automobiles, home appliances and other fields. For example, multi-pass oil pipes of aero-engines, exhaust pipes, sub-frames, chassis, etc. of automobiles, and multiple copper pipes in air conditioners are all formed by internal high-pressure forming methods gradually replacing traditional methods. The basic technological process of this technology is as follows: first, the billet is pretreated, and then the tube blank is placed in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D26/033F15B21/08F15B1/02
CPCB21D26/033B21D26/041F15B1/02F15B21/08
Inventor 杨连发张明河付永佩李坤翟志方马建平
Owner GUILIN UNIV OF ELECTRONIC TECH
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