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Pressure cooling process for thermally-formed steel plate sectionally-strengthen-type parts and die hydraulic device

A segmented strengthening and hot forming technology, applied in the field of high-strength steel stamping, can solve problems such as complex structure, achieve uniform processing technology, improve product strength or elongation, and have a wide range of applications.

Inactive Publication Date: 2014-05-28
WUXI LANGXIAN LIGHTWEIGHT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] In terms of mold structure, this technology requires a heating device inside the active punch and die, so the structure is complicated

Method used

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  • Pressure cooling process for thermally-formed steel plate sectionally-strengthen-type parts and die hydraulic device
  • Pressure cooling process for thermally-formed steel plate sectionally-strengthen-type parts and die hydraulic device
  • Pressure cooling process for thermally-formed steel plate sectionally-strengthen-type parts and die hydraulic device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] like Figure 3-Figure 5 As shown, the workpiece is 1.2mm thick, 150 wide, 1000 long hot-formed boron steel workpiece section forming and quenching diagram. The workpiece product requirement is f 6 The corresponding product area is HS400 soft area, and the rest are hard area HS1150. The concrete preparation process schematic diagram of this method, wherein:

[0062] figure 1 In its original state, according to figure 1 It can be seen that the device for realizing this method includes: upper mold 1, lower mold 2, upper mold inner hydraulic cylinder 3, lower mold inner hydraulic cylinder 4, upper mold pressing core 5, lower mold pressing core 6, and upper slider 7 of the press 8. Workbench under the press.

[0063] The upper mold 1 covers the range of HS1150 in the hard area of ​​the product, and the material is high-quality mold steel SKD61;

[0064] The upper mold pressing material core 5 covers the product soft zone HS400 range, and the material is high-quality mo...

Embodiment 2

[0082] like Figure 3-Figure 5 As shown, the workpiece is 1.2mm thick, 150 wide, 1000 long hot-formed boron steel workpiece section forming and quenching diagram. The workpiece product requirement is f 6 The corresponding product area is HS400 soft area, f 8 except f 6 Outside the area is the soft area HS700, and the rest of the product area is the hard area HS1150.

[0083] This method realizes the device such as figure 1 shown, where:

[0084] The upper mold 1 covers all areas of the product soft area HS700 and hard area HS1150, and the material is high-quality die steel SKD61;

[0085] The upper mold pressing material core 3 covers all areas of the soft area HS700 of the product, and the material is high-quality mold steel SKD61;

[0086] The lower mold pressing material core 6 covers all areas of the product soft zone HS400 and soft zone HS700, and the material is high-quality mold steel SKD61;

[0087] The lower mold 2 covers all areas of the hard area HS1150 of th...

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Abstract

Disclosed are a pressure cooling process for thermally-formed steel plate sectionally-strengthen-type parts and a die hydraulic device in the field of thermal-forming punching. Through a servo cylinder device in a die, existence of pressure-maintaining loading force applied on different regions of a workpiece is controlled according to design needs to control cooling speed of each sub-region so as to acquire mechanical performance of different materials of all sub-regions of a plate. By the pressure cooling process and the die hydraulic device, needed material characteristics can be realized at any region according to the design needs without additionally arranging a die heating device, so that production cost and process complexity are lowered remarkably.

Description

technical field [0001] The invention relates to a method in the technical field of high-strength steel stamping, in particular to a pressure cooling process and a mold hydraulic device for segmentally strengthened hot-formed steel plate parts with a strength of about 1500MP. Background technique [0002] As a new type of ultra-high-strength hot-formed steel plate, automotive boron steel plate provides the possibility for segmental strengthening technology—the same part can adopt different heat treatment processes in different regions of the part according to the needs of automobile design, so as to obtain different strength and plasticity. The production process of the soft zone technology for hot-formed boron steel materials is divided into 4 stages: [0003] 1) Heating: heating the boron steel plate to the temperature required for heat treatment; [0004] 2) Transmission: transfer the boron steel plate to the die to be stamped; [0005] 3) Forming: Stamping and forming ...

Claims

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Application Information

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IPC IPC(8): B21D22/02B21D37/16
Inventor 陈扬
Owner WUXI LANGXIAN LIGHTWEIGHT TECH CO LTD
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