Clamp type compact on-line quenching system

Abstract

The invention discloses a clamp type compact on-line quenching system, comprising a heating furnace and a jet cooling device. The clamp type compact on-line quenching system characterized in that: (1) the heating furnace employs a structure capable of opening and closing up and down and making a horizontal movement perpendicular to an extrusion direction; (2) the jet cooling device also employs a structure capable of opening and closing up and down and making the horizontal movement perpendicular to an extrusion direction, and the jet cooling device is against the heating furnace and close to the surface of an extruded profile; and (3) a multi-roll guide device with a traction effect is additionally arranged.

Description

technical field [0001] The invention belongs to the technical field of metal pressure processing and manufacturing, and in particular relates to a novel on-line quenching system for aluminum alloy extrusion profiles. Background technique [0002] Heat-treatable and strengthened aluminum alloy extruded profiles usually require solution treatment and quenching procedures after extrusion to obtain strong aging strengthening capabilities. In order to fully dissolve the strengthening elements in the alloy into the alloy matrix, obtain an ideal supersaturated solid solution, and make the alloy have a strong aging strengthening ability, on the one hand, it is required that the extruded profile reach a high enough temperature without overburning (that is, local melting). On the other hand, rapid cooling after solution treatment (that is, short quenching transfer time and fast quenching cooling rate) is required to obtain an ideal supersaturated solid solution. The traditional quenc...

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Problems solved by technology

The disadvantages of this process are large equipment investment, high energy consumption, long production process and low production efficiency.

However, there are three unfavorable problems in the development of on-line quenching technology: first, the temperature of the profile is low when it comes out of the extrusion outlet, which cannot reach the solid solution treatment temperature of the product, so it is necessary to add a period between the extrusion outlet and water spray cooling. The high-efficiency heating device makes the profile heated to the solution treatment temperature during the traveling process; secondly, the extruded profile moves forward slowly and the aluminum alloy dissipates heat quickly, which leads to a large drop in product temperature before water spray cooling, reaching The purpose of quenching is not achieved, so the water spray cooling part is required to be as close as possible to the high-efficiency heating part, the quenching transfer time is shortened, and the temperature gradient of cooling in the profile is increased; Third, if the online high-efficiency heating makes the extruded profile reach the required solid solution Processing temperature, the profile will soften and be prone to bending, which requires proper guiding and traction

[0003] Chinese patent application 200510002380.3 discloses an "on-line quenching method for 7075 aluminum alloy profiles"; Although these online quenching devices (or systems) are designed for the implementation of alloy thermal processing on-line quenching, however, the bottom of their heating furnace is fixed, and the quenching water tank is far away from the heating furnace, that is, for profiles The distance between the water spray cooling part and the heating part is relatively large (the distance between the heating furnace and the water spray cooling device is not compact), the quenching transfer time is long, and the temperature gradient of cooling in the profile is small

Considering that to obtain high-efficiency heating of the profile moving at a certain speed, the furnace temperature of the heating furnace will exceed the melting point of the alloy profile. If the bottom of the above-mentioned fixed heating furnace exceeds the melting point of the profile, it will not be able to solve the problem of high-efficiency heating and "alloy overburning or The contradiction between "melting"

It will not achieve the effect of good solid solution treatment for the alloy profile traveling at a certain speed; while the distance between the water nozzle of the fixed water tank and the profile is relatively large, and the cooling point on the surface of the profile for spray cooling is unclear. Causes the profile to be slightly cooled before being intensely cooled, so the quenching effect is not good

In addition, none of them has a guide and traction device, which cannot effectively limit the degree of bending and twisting of the extruded profile during the efficient heating and quenching process

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