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Process for machining corrugated pipe fitting by means of electromagnetic pre-deformation forming technique

A technology of corrugated pipe fittings, which is applied in the field of processing corrugated aluminum alloy energy-absorbing pipe fittings, can solve the problems of insufficient energy absorption efficiency of thin-walled round pipes, and achieve the effects of improving energy absorption efficiency, easy operation, and fast forming speed

Inactive Publication Date: 2014-08-13
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a corrugated aluminum alloy energy-absorbing pipe fitting produced by using electromagnetic pre-forming technology to process pipe fittings, so as to solve the problem that the energy absorption efficiency of thin-walled round pipes currently used is not high enough

Method used

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  • Process for machining corrugated pipe fitting by means of electromagnetic pre-deformation forming technique
  • Process for machining corrugated pipe fitting by means of electromagnetic pre-deformation forming technique
  • Process for machining corrugated pipe fitting by means of electromagnetic pre-deformation forming technique

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1, the discharge forming of the bellows without spacing is as follows image 3 , Figure 4 shown.

[0024] Step 1: install the pipe fittings; place the pipe fittings 2 in the pipe fitting restraining device 3 for fixing, the pipe fitting 2 is a thin-walled aluminum alloy pipe fitting, the wall thickness = 1.2mm, ensure that the pipe fitting restraining device 3 and the pipe fitting 2 axis coincide, pass The coil guide rod 5 places the solenoid coil 1 at the position where the pipe member 2 is to be bulged.

[0025] Step 2: The number of turns of the solenoid coil 1 is 3, the capacitance of the charging capacitor bank C is 768-1152μF, the resistance R is 0.01Ω-0.03Ω, and the Z parameter of the rectifier is reverse bias voltage 50kV / average current not less than 3.5A , the transformer P parameter is 220V-8kV, close the discharge control switch K, the capacitor bank C discharges through the solenoid coil 1, the discharge voltage is 1000-3500V, and the forming ...

Embodiment 2

[0027] Example 2, discharge forming of corrugated pipes with different pitches.

[0028] Step 1, with embodiment 1

[0029] Step 2: By adjusting the advance amount of the coil guide rod 5 to the solenoid coil 1, the corrugated pipe parts with different pitches are processed, and a is the pitch between the corrugations. Turn off the discharge control switch K, the capacitor bank C discharges through the solenoid coil 1, the parameters are the same as those in embodiment 1, and a ripple is formed under the action of electromagnetic force. To ensure that the pipe restraint device 3 and the pipe 2 do not move, the solenoid coil 1 advances a larger distance inside the pipe 2, and the distance between the corrugations increases, thereby forming corrugations with different distances. By continuously adjusting the advance of the solenoid coil 1 , corrugations with different pitches are formed on the pipe 2 .

[0030] Step 3: Same as Example 1.

Embodiment 3

[0031] Embodiment 3, pipe fittings with different corrugated widths are discharged into, such as Figure 5 , Figure 6 shown.

[0032] Step 1, with embodiment 1

[0033] Step 2, it is necessary to increase the corrugation width of the pipe fittings by increasing the number of turns of the solenoid coil 1, A is the width of the corrugation, Figure 5 The number of turns of the middle coil is 4, Figure 6 The number of turns in the middle circle is 5. Turn off the discharge control switch K, the capacitor bank C discharges through the solenoid coil 1, the parameters are the same as in the embodiment 1, and the pipe part 2 can be formed into a corrugation with a wide width under the action of electromagnetic force.

[0034] Step 3: Same as Example 1.

[0035] The present invention forms corrugations on thin-walled circular pipes. The adjustment and matching of specific dimensional parameters such as the number of corrugations, width, height, and spacing have a great influenc...

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Abstract

The invention discloses a process for machining a corrugated pipe fitting by means of an electromagnetic pre-deformation forming technique. The process includes the steps of (1) pipe fitting installation and (2) discharging forming of the corrugated pipe fitting, wherein in the step of pipe fitting installation, the pipe fitting is fixed well through a pipe fitting restraint device, the pipe fitting restraint device is overlapped with the axis of the pipe fitting, and a solenoid coil is arranged in the portion, needing to form, in the pipe fitting; in the step of discharging forming of the corrugated pipe fitting, the electric capacity of a charging capacitor set of the solenoid coil is 768-1152 mu F, a discharging control switch is turned off, the capacitor set is discharged through the solenoid coil, expansion and deformation of the pipe fitting are caused and corrugation is formed. The process has the following technical advantages that the corrugated aluminum alloy energy-absorption pipe fitting is machined by means of the electromagnetic pre-deformation forming technique, the method is easy and convenient to carry out, operations are easy to carry out, the forming speed is high, and cost is saved; the shape and the size of corrugation can be effectively controlled, and adaptability needed by energy absorption is flexible; yield strength of materials on the expansion portion is quite different from that on the trough positions, the strength of the pipe fitting in the axial direction is different, and the deformation mold is controllable; and energy absorbing efficiency of a thin-walled round pipe can be obviously improved.

Description

technical field [0001] The invention relates to the technical field of metal structure processing, in particular to a process for processing corrugated aluminum alloy energy-absorbing pipe fittings using electromagnetic pre-forming technology. Background technique [0002] Metal thin-walled components, as energy-absorbing components, are widely used in collision kinetic energy dissipation systems of almost all vehicles such as automobiles, ships, and airplanes. Metal thin-walled components mainly rely on their own plastic deformation to absorb the impact kinetic energy in vehicle collisions. When subjected to impact loads, their failure modes are stable, and they can absorb and consume energy through their own plastic deformation in a controllable manner. And produce a certain crushing stroke, so as to achieve the purpose of absorbing the kinetic energy of the vehicle and reducing the deceleration of the vehicle. From the perspective of energy absorption, the deformation mo...

Claims

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Application Information

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IPC IPC(8): B21D26/14
Inventor 徐俊瑞崔俊佳林启权苏继爱赵文娟肖良红刘洋
Owner XIANGTAN UNIV
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