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Optimum temperature control device for thermoforming of high-strength steel

An optimal temperature and control device technology, applied in the field of high-strength steel hot forming, can solve the problems of insufficient cooling rate, insufficient part strength, poor hot-formability of high-strength steel material, etc., to improve service life, improve productivity, and shorten work. The effect of temperature cycling

Inactive Publication Date: 2014-07-30
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the problem of insufficient hot formability of high-strength steel material and insufficient cooling rate in the prior art, and provide an optimal temperature control device for high-strength steel hot forming

Method used

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  • Optimum temperature control device for thermoforming of high-strength steel
  • Optimum temperature control device for thermoforming of high-strength steel
  • Optimum temperature control device for thermoforming of high-strength steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Example 1: Low-level working process.

[0078] refer to Figure 14 and Figure 16 , when the thickness of the high-strength steel sheet 20 to be cooled is thin and the size is small, the low-level working process can be considered. For example, the 22MnB5 rough sheet of 800mm×600mm×1.5mm is used as the operation object to ensure that the optimum forming temperature is 650°C before forming.

[0079] The low-level working process consists of the following steps:

[0080] 1. Use a cutting machine to cut a 22MnB5 blank sheet of 800mm×600mm×1.5mm;

[0081] 2. Transfer it to a heating furnace through a mechanical device, raise the temperature to 900°C, and keep it warm for 5 minutes to ensure that the internal structure of the blank sheet is completely transformed into uniform austenite;

[0082] 3. Subsequently, the fully austenitized high-temperature high-strength steel material 20 is quickly transferred to the lower heat conduction plate 4 of the optimal temperature co...

Embodiment 2

[0087] Example 2: Advanced working process.

[0088] refer to Figure 15 and Figure 16 , when the high-strength steel sheet 20 to be cooled has a thick thickness and a large size, an advanced working process may be considered. For example, the 22MnB5 rough sheet of 2000mm×1500mm×3mm is used as the operation object to ensure that the optimum forming temperature is 650°C before forming.

[0089] The high-level working process includes the following steps:

[0090] 1. Use a cutting machine to cut a 22MnB5 blank sheet of 2000mm×1500mm×3mm;

[0091] 2. Transfer it to a heating furnace through a mechanical device, raise the temperature to 900°C, and keep it warm for 5 minutes to ensure that the internal structure of the blank sheet is completely transformed into uniform austenite;

[0092] 3. Subsequently, the fully austenitized high-temperature high-strength steel material 20 is quickly transferred to the lower heat conduction plate 4 of the optimal temperature control device ...

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Abstract

The invention discloses an optimum temperature control device for thermoforming of high-strength steel, and aims to solve the problems that the strength of a component is insufficient because of poor thermoforming properties and insufficient cooling rate of a high-strength steel plate. The optimum temperature control device comprises an upper mechanism, a lower mechanism and an unloading mechanism, wherein the upper mechanism is positioned above the lower mechanism; the unloading mechanism is positioned on the right side of the lower mechanism; the lower mechanism comprises a lower heat-conducting plate (4), a lower mold base (5), a radiating fin frame (7), a radiating mechanism and lower thermocouples (13); the lower thermocouples (13) are respectively mounted in the grooves in the upper surface of the lower heat-conducting plate (4); each lower thermocouple (13) is connected to the groove in the lower heat-conducting plate (4) by adopting spot welding; the lower surface of the lower heat-conducting plate (4) and the upper surface of the lower mold base (5) are contacted with each other and are connected with each other by welding; the lower surface of the lower mold base (5) and the upper surface of the radiating fin frame (7) are contacted with each other and are connected with each other by welding; the radiating mechanism is positioned at the center position at the lower part of the radiating fin frame (7).

Description

technical field [0001] The invention relates to a control device in the field of hot forming of high-strength steel, more precisely, the invention relates to an optimal temperature control device for hot forming of high-strength steel. Background technique [0002] In order to pursue the lightweight of the body, without changing the body specifications, the weight of the body structure can be realized by optimizing the body structure, updating the manufacturing and connection process of body parts, and replacing traditional low-strength steel with lightweight materials. For a long time, steel has been the basis of machine manufacturing. Although the amount of composite materials such as magnesium-aluminum alloys and plastics is increasing in the automobile manufacturing process, high-strength steels are characterized by their high weight reduction potential, high impact absorption energy, high fatigue strength, high formability and low plane anisotropy, etc. It has an irrep...

Claims

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Application Information

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IPC IPC(8): B21D37/16B21D22/02
Inventor 庄蔚敏解东旋李冰娇许钦华李兵张梦溪张凯希
Owner JILIN UNIV
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