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Combined type multipoint-distributed pressing device and free bending forming method for pipe

A pressing device and compound technology, applied in the directions of feeding device, positioning device, storage device, etc., can solve the problems of poor adaptability of pipe specifications and material strength, uneven application of pressing force, and obstruction of pipe feeding movement, etc. Achieve the effect of improving the forming ability and forming efficiency, solving the uneven application of pressing force, and solving the poor adaptability of material strength

Active Publication Date: 2021-10-22
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, if the pressing force is insufficient, serious instability will occur when the axial compressive stress exceeds the rigidity limit of the pipe; if the pressing force is too large, an excessive propulsion load will be generated, which will hinder the feeding movement of the pipe
However, the existing pressing device applies uneven pressing force, the adjustable range of pressing stroke and pressing force is small, and the adaptability to the specification and material strength of the pipe is poor; in addition, the pipe lacks circumferential pressing during the feeding process Constrained, prone to abnormal rotation
Therefore, the compaction problem can lead to poor forming stability of complex structural catheters, which seriously reduces product quality, equipment forming ability and forming efficiency, and limits the development and application of three-dimensional free bending forming technology.

Method used

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  • Combined type multipoint-distributed pressing device and free bending forming method for pipe
  • Combined type multipoint-distributed pressing device and free bending forming method for pipe
  • Combined type multipoint-distributed pressing device and free bending forming method for pipe

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Experimental program
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Effect test

Embodiment 1

[0044] This embodiment discloses a composite multi-point distributed pressing device, as a basic implementation of the present invention, such as figure 1 As shown, including the fuselage frame and several pressing mechanisms, such as figure 1 with image 3 As shown, six pressing mechanisms can be set, and all the pressing mechanisms are arranged on the fuselage frame along the feeding direction of the pipe to form a multi-point distributed pressing condition.

[0045] The fuselage frame is an important part of the supporting pressing mechanism, such as figure 1 As shown, a base 1 and a frame body 2 are included, and the frame body 2 is fixedly connected to the base 1 . The pressing mechanism comprises a mounting seat 3 , an upper pressing block 4 , a lower pressing block 5 , an upper pressing wheel set, a lower pressing wheel set and at least one pneumatic mechanism 6 . Wherein, the upper pressing block 4 is fixedly connected with the bottom of the mounting base 3 , and th...

Embodiment 2

[0047] In order to better realize the present invention, this embodiment discloses a preferred implementation, in order to further ensure the uniformity and effectiveness of the pressure applied to the pipe 13 to be formed, that is, in Example 1, as figure 2 As shown, the pressing mechanism is provided with two synchronously moving pneumatic mechanisms 6. Specifically, the top of the mounting seat 3 is provided with two hinges I11 at intervals along the pipe feeding direction, and the two hinges I11 are in the middle of the axis of the mounting seat 3. The distances between the points are equal, and the drive connecting rods 6.2 of the two pneumatic mechanisms 6 are detachably connected to the mounting base 3 through two hinges I11 respectively. Further, the upper pressing wheel set includes two pressing wheel assemblies 12 respectively located at both ends of the upper pressing block 4, and the lower pressing wheel set includes two pressing wheel assemblies 12 respectively lo...

Embodiment 3

[0049] In order to better realize the present invention, this embodiment discloses a preferred embodiment, that is, in Example 1, the upper compression block 4 and the lower compression block 5 are made of nylon material, and the friction coefficient of nylon material is small, and at the same time It has excellent mechanical strength and fatigue resistance, and is easy to process and replace. It can save production costs while ensuring the surface quality of formed pipes, and solves the problem of poor adaptability of material strength. Further, the pressure pipe groove 9 is a V-shaped groove. Compared with the pressure pipe groove 9 of other shapes (such as; if the pressure pipe groove 9 is arc-shaped, except for the pipe material 13 to be formed that is just the same as the diameter of the pressure pipe groove 9, Other pipes 13 to be formed are not applicable), the V-shaped groove is more versatile, applicable to various pipes 13 to be formed with different diameters, and ca...

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Abstract

The invention belongs to the technical field of free bending for pipes, and particularly relates to a combined type multipoint-distributed pressing device and a free bending forming method for a pipe. In the pressing device of the technical scheme, a plurality of pressing mechanisms are cooperated, multipoint-distributed pressing for the to-be-formed pipe can be realized, the pressing mechanisms are independent of one another, and the to-be-formed pipe can be reliably pressed on the premise that normal propelling of a propelling device is not interfered, so that reworking and scrapping caused by axial instability and circumferential abnormal rotation of the pipe component are avoided, the forming capacity of three-dimensional free bending equipment is remarkably improved, and the forming efficiency of the three-dimensional free bending equipment is remarkably increased.

Description

technical field [0001] The invention belongs to the technical field of free bending of pipes, and in particular relates to a composite multi-point distribution compacting device for three-dimensional free bending forming equipment and a free bending forming method for pipes based on the compacting device. Background technique [0002] In recent years, the design of military aircraft is moving towards the direction of flat structure, compact space, and overall lightweight, which puts forward higher requirements for the integration, precision, and reliability of metal piping components. Because such components usually have important geometric features such as three-dimensional complex axes, continuously variable curvature radii, or complex mixed curvature radii, the traditional bending forming technology has prominent problems such as high mold cost, narrow forming range, and poor process flexibility, which seriously restricts complex tubes. Development and engineering applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D7/08B21D7/16B21D7/12B21D43/08
CPCB21D7/085B21D7/16B21D7/12B21D43/08B21D43/006
Inventor 贺子芮李光俊郭训忠张浩程诚
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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