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Method for manufacturing local boss nut plate by high-intensity biphase steel plate

A high-strength, high-boss technology is applied in the field of multi-step composite forming of high-strength dual-phase steel plates with local high-boss nut plates. good performance

Inactive Publication Date: 2013-02-20
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is very difficult to form the high-boss nut plate of this kind of material, and it needs multi-pass forming and annealing treatment

Method used

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  • Method for manufacturing local boss nut plate by high-intensity biphase steel plate
  • Method for manufacturing local boss nut plate by high-intensity biphase steel plate
  • Method for manufacturing local boss nut plate by high-intensity biphase steel plate

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manufacture example

[0023] A specific manufacturing example of high boss nut plate is as follows:

[0024] a. According to the size requirements of the parts, the raw materials are stamped into such figure 1 The shown rectangular blank (dimensions: length x width 42.5 x 38 mm, thickness 6 mm) is made of B340 / 590 DP cold-rolled dual-phase steel plate.

[0025] b. If Figure 4 After the blank 2 is put into the die 4 and positioned, the pressure plate 3 first contacts the sheet blank 2 and presses it tightly, and then the step punch 1 acts on a 1000KN press (F 冲 ) to move down and contact with the blank 2, so that the blank 2 flows into the cavity of the die 4 and contacts with the flat back pressure ejector pin 5, when the stroke of the step punch 1 reaches 6mm ( Figure 4 When the position of 1, 2, and 5 on the right side of the central axis [dotted line]), the step punch 1 stops moving downward, and the preformed section of the blank 2 is as follows image 3 (a).

[0026] c. Figure 5 After ...

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Abstract

The invention discloses a multistep composite forming method for manufacturing a local high-boss nut plate by a high-intensity biphase steel plate. A high-intensity biphase steel plate blank is taken as a blank; and the blank is subjected to multiple composite formation procedures of debossing, cold impact forging, cold extrusion, cold punching and annealing by a stepped convex die, conical convex dies with different heights, a flattop convex die and a back-pressure convex die. The plate blank is taken as the blank and is subjected to multistep composite forming. By the method, biphase particles are separated out in a plastic processing process and are used for processing the plate blank with remarkable hardening to form a local high boss. The loads of the dies are small by virtue of the multistep composite forming method, and the material utilization rate is high by virtue of the plastic processing, so that a large quantity of materials are saved, the structure performance is good, and the method is particularly suitable for production of components for high load connection.

Description

technical field [0001] The invention relates to a multi-step composite forming method for a high-strength dual-phase steel plate with a local high-boss nut plate. The method specifically relates to a method for manufacturing a local high-boss nut plate on such a sheet material by cold forging, cold extrusion, and cold stamping. . Background technique [0002] The high-strength and high-boss nut plate is a key part in the automobile manufacturing industry to realize the fixed connection between various components. At present, most of them are produced by welding, cutting, plastic processing and other processes. Because plastic processing has high production efficiency, saves materials, and the processed nut plates have good comprehensive mechanical properties, most of the mass production of high-boss nut plates adopts plastic processing methods. In contrast, using methods such as welding and cutting to produce high-boss nut plates requires more processes, low production ...

Claims

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Application Information

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IPC IPC(8): B23P15/00
Inventor 王雷刚黄瑶贺佳阳王楚翘
Owner JIANGSU UNIV