3D free-bending forming method and five-axis free bending device for metal pipes

A metal pipe and bending technology, applied in the field of metal pipe 3D free bending forming method and five-axis free bending equipment, can solve the problems of uneven surface of welded pipe bend, reduced pipe strength, large fluid resistance, etc. Distortion, good forming quality and high production efficiency

Active Publication Date: 2017-03-08
固航科技(常州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems of the above forming process are: (1) due to the existence of weld seam and residual stress, the strength of the pipe fittings is reduced and the reliability is poor; (2) the inner surface of the welded elbow is not smooth, and the fluid resistance is large, etc.

Method used

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  • 3D free-bending forming method and five-axis free bending device for metal pipes
  • 3D free-bending forming method and five-axis free bending device for metal pipes
  • 3D free-bending forming method and five-axis free bending device for metal pipes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] 1) Use a 3D scanning measuring instrument to perform reverse scanning on the target "L"-shaped elbow formed by a semi-automatic method to obtain its three-dimensional geometric model;

[0061] 2) In the reverse scanning and measuring workstation, the three-dimensional geometric model is analyzed to obtain the size parameters of the "L"-shaped elbow: the outer diameter is 20mm, the length of the straight section at both ends is 200mm, and the radius of the arc section is 87.85mm , The "L" shaped elbow is carried out as follows Figure 8 segment shown. Take the pipe axial feeding speed u z =10mm / s, the distance A from the bending die to the center of the bending die base is 30mm. Convert this size parameter into the actual bending process parameters of each small segment, as shown below, where u x is the movement speed of the bending die in x direction, u y is the movement speed of the bending die in the y direction, w is the rotational angular velocity of the bendi...

Embodiment 2

[0081] 1) Use a 3D scanning measuring instrument to perform reverse scanning on the target "U"-shaped elbow formed by a semi-automatic method to obtain its three-dimensional geometric model;

[0082] 2) In the reverse scanning and measuring workstation, the three-dimensional geometric model is analyzed to obtain the size parameters of the "U"-shaped elbow: the outer diameter is 15mm, the length of the straight section at both ends and the bottom is 200mm, and the radius of the arc section is 63.75mm, two arc segments Both are 90°. The "U" bend is carried out as follows Figure 9 segment shown. Take the pipe axial feeding speed u z =10mm / s, the distance from the bending die to the center of the bending die base is 22.5mm. The conversion of this size parameter into actual bending process parameters is as follows, where u x is the movement speed of the bending die in x direction, u y is the movement speed of the bending die in the y direction, w is the rotational angular v...

Embodiment 3

[0111] 1) Use a 3D scanning measuring instrument to perform reverse scanning on the target "S"-shaped elbow formed by a semi-automatic method to obtain its three-dimensional geometric model;

[0112] 2) In the reverse scanning and measuring workstation, the three-dimensional geometric model is analyzed to obtain the size parameters of the "S"-shaped elbow: the outer diameter is 15mm, the radius of the two semicircles is 100mm, and the radius of the two arc segments is The values ​​are all 90°. The "S" bend is carried out as follows Figure 10 segment shown. Take the pipe axial feeding speed u z =10mm / s, the distance from the bending die to the center of the bending die base is 22.5mm. The conversion of this size parameter into actual bending process parameters is as follows, where u x is the movement speed of the bending die in x direction, u y is the movement speed of the bending die in the y direction, w is the rotational angular velocity of the bending die around its ...

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Abstract

The invention discloses a 3D free-bending forming method and five-axis free bending device for metal pipes. The five-axis free bending device for the metal pipes comprises a pipe pushing module, a pipe axial-movement guiding module, a manipulator bending module, an induction coil heating module, a lubrication module, a reverse scanning module and a measurement module. The pipe pushing module comprises a conical push rod (3), a Z-direction servo motor (5), a ball screw (4) and a linear guide rail (1), and the Z-direction servo motor (5) is used for axial feeding of the pipes. The manipulator bending module comprises an X-direction servo motor (15), a Y-direction servo motor (16), a bending die driving servo motor (18), a bending die holder driving servo motor (17), a bending die (8) and a bending die holder (9). According to the 3D free-bending forming method and five-axis free bending device for the metal pipes, elbow pipes with different bending radii can be formed only by controlling the movement track of the manipulator bending device, and meanwhile since the plane of the bending die can be kept perpendicular to the axes of the pipes in real time, the forming quality of the bent pipes is good.

Description

technical field [0001] The invention belongs to the technical field of advanced manufacturing of complex metal components, and in particular relates to a 3D free-bending forming method for metal pipes and five-axis free-bending equipment. Background technique [0002] At present, in the fields of aerospace, nuclear energy, and petrochemical engineering, there is a very important practical demand for planar or three-dimensional elbows with variable bending radii and axes that are plane or space curves. In the field of aerospace engineering, aerospace vehicles generally do not have large-sized hollow components due to weight and space constraints. For bent pipes, since the space configuration of complex bent pipes with variable bending radius, axis plane or space curve is more flexible, the space can be effectively used, making the overall structure of the assembly more compact. In addition, the use of the above complex configuration elbow can greatly reduce the weight of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D7/08B21D7/14B21D7/16B21D37/16
CPCB21D7/085B21D7/14B21D7/162
Inventor 郭训忠马燕楠陶杰
Owner 固航科技(常州)有限公司
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