Inductor for divisionally and incrementally forming bimetal composite pipe

A bimetallic composite pipe and progressive forming technology, applied in the field of bimetallic pipe forming, can solve problems such as uneven distribution of electromagnetic force, sparse magnetic lines of force, damage to composite interface performance, etc., to improve bonding strength and composite rate, radial unevenness The effect of reducing the degree and increasing the metallurgical recombination rate

Active Publication Date: 2013-12-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Depend on Figure 4 It can be seen that since the longitudinal section of the working area is straight, the configuration of the outer tube blank in the previous compounding step changes, and at this time there is a large difference in the radial gap between the sensor working area and the outer tube blank , thus changing the density of the magnetic field lines in the working area, making the distribution of the electromagnetic force extremely uneven, which in turn leads to the problem of uncoordinated deformation of the composite pipe fittings: the large radial gap in the transition zone 7 leads to sparse magnetic field lines, and the radial electromagnetic force received It is obviously smaller than the electromagnetic force received by the deformation zone 9, so the deformation zone 9 preferentially undergoes plastic deformation, and the transition zone 7 is driven to deform and fit the inner tube blank, which finally leads to radial deformation of the bimetallic composite tube blank along the axial direction. Evenly distributed
In addition, the deformation coordination problem caused by this conventional inductor can also lead to a low metallurgical recombination rate
This is because the deformation zone 9 hits the inner tube blank in a nearly vertical manner, and it is impossible to obtain a better match between the collision angle and the collision speed. Finally, the interlayer bonding method of the bimetallic composite tube blank is mainly mechanical bonding. Composite interface performance will limit the scope of use of bimetallic composite pipe fittings

Method used

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  • Inductor for divisionally and incrementally forming bimetal composite pipe
  • Inductor for divisionally and incrementally forming bimetal composite pipe
  • Inductor for divisionally and incrementally forming bimetal composite pipe

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specific Embodiment approach 1

[0020] Specific implementation mode 1: Combination Figure 7 ~ Figure 10 It will be explained that, in this embodiment, an inductor for gradually forming a bimetallic composite tube by partitions has an outer shape of a cylinder 13, and the two ends of the cylinder 13 are respectively along the axial direction. A truncated truncated groove 10 is machined in the direction, and a mounting hole communicating with the two truncated truncated troughs 10 is machined in the middle of the cylinder 13, and the mounting hole is arranged coaxially with the two truncated truncated troughs 10. The enclosed area is the working area 6. The side wall of the cylindrical body 13 is radially provided with a long slit 14 communicating with the assembly hole. The assembly hole is composed of a large truncated cone hole 11 and a small truncated cone hole 12. The small diameter end of the truncated truncated hole 11 coincides with the large diameter end of the truncated truncated truncated hole 12, a...

specific Embodiment approach 2

[0028] Specific implementation manner two: combination Figure 7 It is explained that the axial length L2 of the small truncated cone-shaped hole 12 in this embodiment is 2 mm to 6 mm. The technical features not disclosed in this embodiment are the same as those in the first embodiment.

specific Embodiment approach 3

[0029] Specific implementation mode three: combination Figure 7 It is explained that the connection between the large truncated cone-shaped hole 11 and the small truncated cone-shaped hole 12 is provided with a large transition fillet, and the radius of curvature of the large transition fillet is R1, R1=20mm, and the large truncated cone-shaped hole 11 is adjacent to The junction of the truncated cone-shaped groove 10 and the junction of the small truncated cone-shaped hole 12 and the adjacent truncated cone-shaped groove 10 are respectively provided with small transition fillets, and the radius of curvature of the small transition fillets is R2, R2=1mm. The technical features not disclosed in this embodiment are the same as those in the first embodiment.

[0030] The setting of the β angle is used to make the transition zone 7 preferentially deform; the setting of the α angle makes the radial gap between the inductor and the outer tube 4 gradually increase from right to left, fo...

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Abstract

The invention provides an inductor for divisionally and incrementally forming a bimetal composite pipe, which belongs to the technical field of forming of the bimetal composite pipe and aims to improve the divisional and incremental forming composite rate of a bimetal composite pipe fitting and the radial uniformity of the bimetal composite pipe fitting. According to the inductor, one assembling hole communicated with two circular-platform-shaped grooves is machined in the middle of a cylinder; a region around the assembling hole is a working region; the assembling hole is composed of a large circular-platform-shaped hole and a small circular-platform-shaped hole; the small-diameter end of the large circular-platform-shaped hole is overlapped with the large-diameter end of the small circular-platform-shaped hole; the large-diameter end of the large circular-platform-shaped hole and the small-diameter end of the small circular-platform-shaped hole are located at the two ends of the assembling hole respectively; an included angle between the generatrix of the large circular-platform-shaped hole and the horizontal plane is alpha; an included angle between the generatrix of the small circular-platform-shaped hole and the horizontal plane is beta; the axial length of the large circular-platform-shaped hole is L1 and the axial length of the small circular-platform-shaped hole is L2; the axial length of the assembling hole is L0. The inductor for divisionally and incrementally forming the bimetal composite pipe is used for compounding the bimetal composite pipe fitting.

Description

Technical field [0001] The invention relates to an inductor for forming a bimetal composite pipe, belonging to the technical field of bimetal pipe forming. Background technique [0002] The bimetal tube is composed of an inner tube blank and an outer tube blank, and the inner and outer tube blanks are tightly combined. When bearing an external load, the inner tube blank and the outer tube blank deform at the same time. Bimetallic pipe fittings can be divided into mechanical joining and metallurgical joining according to the joining method between pipe layers. The former is also called double-layer pipe fittings and the latter is also called bimetal composite pipe fittings. The materials of the inner tube blank and outer tube blank can be matched with different materials according to the working conditions. Therefore, the bimetallic tube can not only have the required high strength, but also have excellent corrosion resistance and wear resistance. And other properties, give full...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D26/14
Inventor 于海平范治松李春峰
Owner HARBIN INST OF TECH
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