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Induction heating device and application thereof

An induction heating device and an induction heating coil technology are applied in the field of mechanical sheet metal, which can solve the problems of difficult spiral bite forming, limiting the wide application of spiral air ducts, and difficult forming of the bite, so as to achieve good quality of the bite, good sealing, and The effect of improving the compressive strength

Pending Publication Date: 2020-12-08
SINO RES INST OF ROLL FORMING IND CAOFEIDIAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, especially due to the limitation of the capacity of the spiral duct machine rolling mill, the thickness of the formed strip is generally between 0.4mm-1.2mm, and its material is mainly galvanized sheet, pure aluminum sheet, stainless steel, etc. with good plasticity, which greatly limits the Wide application of spiral duct
[0005] When the thickness of the formed strip expands to 2-5mm, it is difficult for the current spiral duct machine on the market to form a bite. In addition, there are certain requirements for the material of the formed sheet. The sheet must have good plasticity, that is, the elongation rate is 20%. above; the strength is low, that is, the yield strength is below 250Mpa; and for plates and strips with poor room temperature plasticity (6%-20% elongation) and high strength (yield strength above 250Mpa), it is not easy to form spiral bite

Method used

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  • Induction heating device and application thereof
  • Induction heating device and application thereof
  • Induction heating device and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] The strip with a strip thickness of 1.2-5mm is uncoiled from the uncoiling device 1, and then the two sides of the strip are locally heated by the induction heating control system 5, and the two sides of the strip are heated by the induction heating device 2, and the infrared temperature sensor 3. Monitor the temperature of the formed strip, and once there is an abnormality, send the signal to the temperature controller 4 to terminate the heating; under normal circumstances, after the edge of the strip is heated, it enters at a certain speed (1-30m / min). The seam forming unit 6 performs flanging and seam forming on the opposite sides. After the two sides of the strip pass through the first seam roller group 7, the second seam roller group 8, and the third seam roller group 9, the strip One side is bent downward to form the lower bite, and the other side is bent upward to form the upper bite. Then the strip enters the bite press unit 10. Under the work of the bite press m...

Embodiment 2

[0073] In the induction heating control system 5 described in Embodiment 1, its heating temperature is controllable, and the induction heating coil is an intermediate frequency. Different heating temperatures can be set for different materials of the strip. Taking the 7075 aluminum alloy strip as an example, forming The thickness of the strip is 2.5mm, the induction heating temperature is between 370-420°C, and the induction heating time is about 10s-15s; taking TC4 titanium alloy strip as an example, the thickness of the formed strip is 3mm, and the induction heating time is about 10s-15s. The heating temperature is between 800-950°C, and the induction heating time is about 15-20s; when the temperature of the strip heating area reaches the predetermined value, the temperature will be fed back to the thermostat in real time through the infrared temperature sensor. Once the temperature is abnormal , the thermostat will quickly cut off the work of the induction heating device.

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Abstract

The invention provides an induction heating device and application thereof, and belongs to the technical field of mechanical metal plates. The induction heating device comprises a support and an induction heating coil. The induction heating coil can be supported by the support; the induction heating coil comprises two layers of coils, namely an upper-layer coil and a lower-layer coil; the lower-layer coil is positioned below the upper-layer coil; and the upper-layer coil is communicated with the lower-layer coil. By means of the method, a strip can be heated, the machining thickness of a common spiral air pipe is increased to 5 mm from 1.2 mm or below, a formed thick-wall spiral air pipe is good in seam quality and sealing performance, and the ring stiffness and the compressive strength are both greatly improved.

Description

technical field [0001] The invention belongs to the technical field of mechanical sheet metal, and in particular relates to an induction heating device and its application. Background technique [0002] At present, the spiral air duct produced by the occlusal molding method generally has a wall thickness of less than 1.2mm and a diameter of less than 1500mm. It was first used in the field of ventilation and cooling, and then gradually expanded to return air ducts for purification systems and central air-conditioning ventilation. Pipes, industrial air supply and exhaust ventilation pipes, mine drainage gas pipes, mine rubberized cloth air ducts and other fields. [0003] Due to a series of advantages such as simple molding technology, good sealing performance, and high ring rigidity, the spiral air duct has begun to be popularized and tried in special occasions such as aerospace ventilation, liquid conveying systems, and nuclear submarine ventilation systems. [0004] Howeve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B6/10H05B6/36B23P23/04
CPCB23P23/04H05B6/10H05B6/36
Inventor 韩静涛杨兴文马晓燕
Owner SINO RES INST OF ROLL FORMING IND CAOFEIDIAN CO LTD