Device for squeezing of tubular billet ends in necks of pressure vessels

FIELD: technological processes.

SUBSTANCE: device for squeezing of tubular billet ends in necks of pressure vessel is related to the field of machine-building. Device of squeezing and expanding of tubular billet ends with heating in necks of pressure vessel contains source of axial force, heater and matrix equipped with mandrel. Matrix is fixed in bath of melt of melting substance with melt temperature that corresponds to superplasticity of tubular billet material. Bath is equipped with ultrasonic generator. Matrix heat exchanger in close proximity to the mirror surface of melt of melting substance vertically bases tubular billet, which interacts with reversible source of axial force and ultrasound.

EFFECT: provision of increase of quality of material structure that is squeezed into pressure vessel necks.

1 dwg, 1 ex

 

The invention relates to mechanical engineering, to the field of forming thin-walled shells, directly to the device for crimping and distribution end of the billet by heating in the neck of the pressure vessel.

Designed for crimping the ends of tubular workpieces of fine metal and alloy, mainly aluminum and iron and their alloy alloys.

There are known various devices for crimping the ends of metal pipes with heating. This sealing roller on the machine, crimping axial force in the matrix pressure.

Know the crimping tool tip billet axial force from the differential heating in the matrix [1, s].

A disadvantage of this device is the differential heating of the tip of the tubular workpieces that does not guarantee the required quality of the structure of the deformed metal.

A device for crimping and distribution pipes with heating, containing the source of the axial force, the heater matrix is equipped with a mandrel [2].

A disadvantage of this device is the difficulty of achieving a stable heater material temperature end of the billet during the crimping of the axial force in the matrix, provided with a mandrel, which also does not guarantee the required quality of the structure of the deformed metal.

The goal is to improve the quality of the structure is formirovanija metal.

The task of improving the quality of the structure of the deformed metal tip of the billet in the axial crimping force with heating in the matrix with the mandrel is solved as follows.

Device for crimping and distribution pipes with heating contains the source of the axial force, the heater matrix is equipped with a mandrel, the matrix reinforced in the bath melt consumable substance with a melting point corresponding to the superplastic material billet, and bath equipped with an ultrasonic generator, and the heat exchanger matrix in the immediate vicinity of the mirror melt consumable substances upright base tube together, interacting with the source of the axial force and the counter-flow ultrasound.

The following drawing shows the section of the device.

The device consists of a matrix 1 with the mandrel 2, heat exchanger 3 and the drainage holes 4, 5 baths with mirror 6 boiling substances, the heater 7 and the ultrasonic generator 8. Item 9 the source of the axial force and the position of the 10 - billet.

The device operates as follows.

Billet 10 is moved to the lifting mechanism (not shown).

Matrix 1 with the mandrel 2 and heat exchanger 3 fortified in the tub 5, which is externally equipped with a heater 7 and the ultrasonic generator 8.

Ultrasonic is th generator 8 is made of magnetostrictive.

Tub 5 is filled by a liquid consumable substance, above the mirror 6 which is located in the heat exchanger 3 matrix 1.

Melting point substances, metals and alloys at normal atmospheric pressure, water Tmelt.=0,00°, glycerin Tmelt.=18°, naphthalene t.=80,3°C, tin Tmelt.=231,9°C, zinc Tmelt.=419,5°C, magnesium Tmelt.=650°C, aluminum Tmelt.=660,4°S, silver Tmelt.=961,9°, duraluminium Tmelt.=650°S, steel Tmelt.=1300-1500° (reference).

You know the slow deformation of fine-grained metals and alloys in a state of superplasticity that occurs in the range of high temperatures from 0.7 to 0.8 of the melting temperature fine-grained metal or alloy, as well as at temperatures slightly below the temperature of the phase transformations.

While the imposition of the ultrasound generator 8 increases the interval superplasticity.

Based on the above billet 10 lifting mechanism for vertically based in the heat exchanger 3 matrix 1 and the axial force 9 gravity low speed through the mirror 6 tip is immersed in the melt consumable substance with a melting point corresponding to the superplastic material billet 10, reaches the state of superplasticity and in the matrix 1, is equipped with a mandrel 2, communicates with a source of axial force 9 and flow ultrasound gene is atora 8, where the crimping end of the tubular workpiece 10, in the neck of the pressure vessel with high quality patterns of the deformed metal.

Additionally, the structure of the deformed metal increases when the distribution of the mandrel 2 holes on the neck of the vessel when removing the workpiece 10 from the matrix 1 lifting mechanism.

An example implementation of the device

Billet 10 of duralumin Tmelt.=650°C, q=2,7, b=5, d=600, l=6000, m=q×b×u×d×l=2,7×5×3,14×600×6000, interval superplasticity tc/p.=0,7×Tmelt....0,8×Tmelt.=0,7×650...0,8×650=475...520°C.

Zinc, Tmelt.=419,5°With the closest interval tc/p.=475...520°duralumin.

The overlay on the process of ultrasound 16÷30 kHz generator 8 increases duralumin interval tc/p.=380...530°S, which is consistent with Tmelt.=419,5°With zinc

Duraluminium billet 10 interval tc/p.=380...530°With lifting mechanism for vertically based in the heat exchanger 3 matrix 1, reinforced in the tub 5 with a melt of molten zinc Tmelt.=419,5°and the gravitational force 9 low speed through the mirror 6 tip is immersed in the molten zinc, reaches superplasticity and in the matrix of the circular path 1, equipped with a mandrel 2, communicates with a source of a gravitational force 9 and flow ultrasound generator 8, is crimped to the neck b×d× 1=25×90×100 with high quality patterns of the deformed metal. Additionally, the quality of the metal structure improves the distribution of the holes of the neck of the mandrel 2 when removing the workpiece 10 from the matrix 1.

The crimping tool and the hand of the ends of billets with heating in the neck of a pressure vessel containing a source of axial force, the heater matrix is equipped with a mandrel, characterized in that the matrix is strengthened in the bath melt consumable substance with a melting point corresponding to the superplastic material billet, and bath equipped with an ultrasonic generator, and the heat exchanger matrix in the immediate vicinity of the mirror melt consumable substances upright base tube together, interacting with the reversible source of axial force and ultrasound.



 

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SUBSTANCE: device for squeezing of tubular billet ends in necks of pressure vessel is related to the field of machine-building. Squeezing device with heating of tubular billet ends in necks of pressure vessel contains source of axial force, heater and matrix equipped with mandrel. Matrix is fixed in bath of boiling substance with boiling temperature that corresponds to superplasticity of tubular billet material. Bath is equipped with ultrasonic generator. Matrix heat exchanger in close proximity to the mirror surface of boiling substance vertically bases tubular billet, which interacts with source of axial force.

EFFECT: provision of increase of quality of material structure that is squeezed into pressure vessel necks.

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