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Method for improving forming precision and surface quality of metal thick plate forming piece

A technology for surface quality and formed parts, which is applied in the field of improving the quality of metal thick plate formed parts, can solve the problems that it is difficult to ensure the forming accuracy and surface quality of formed parts, and achieve the effects of uniform size deviation, improved surface quality, and practical production technology

Active Publication Date: 2014-09-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that it is difficult to ensure the forming accuracy and surface quality of the formed parts when the existing bending forming technology is used to form the metal thick plate parts with changing cross-sectional shapes, and to provide a method for improving the forming accuracy of the metal thick plate formed parts. and surface quality methods

Method used

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  • Method for improving forming precision and surface quality of metal thick plate forming piece
  • Method for improving forming precision and surface quality of metal thick plate forming piece
  • Method for improving forming precision and surface quality of metal thick plate forming piece

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specific Embodiment approach 1

[0012] Specific implementation mode one: combine Figure 1-Figure 12 To illustrate this embodiment, the specific steps of a method for improving the forming accuracy and surface quality of a metal thick plate formed part in this embodiment are:

[0013] Step 1, the selection of the gap between the die 4 and the punch 1 of the mold: the gap Z between the die 4 and the punch 1 used for the bending of the thick metal plate 7 is controlled at 1.0δ-1.2δ, where δ is the thickness of the metal the thickness of the plate 7;

[0014] Step 2. Determination of coefficient of friction: first select a metal ring that is the same alloy as the thick metal plate 7 and whose surface roughness is the same as that of the thick metal plate 7, and use the ring compression method to measure the lubricated and non-lubricated lubricants. The reduction ΔH of the metal ring and the change ΔD of the inner diameter of the ring under lubrication conditions, the reduction ΔH and the change ΔD of the inner...

specific Embodiment approach 2

[0020] Specific implementation mode two: combination Figure 1-Figure 12 To describe this embodiment, the gap Z between the die 4 and the punch 1 in Step 1 of the plate bending forming in this embodiment is 1.02δ-1.1δ. Such setting meets the design requirements and actual needs. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0021] Specific implementation mode three: combination Figure 1-Figure 12 To illustrate this embodiment, the lubricants in step 2 of this embodiment are graphite lubricants, BN lubricants and glass lubricants. With this setting, the lubricating effect is good, and the BN lubricant described in this embodiment is a boron nitride lubricant, which meets the design requirements and actual needs. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for improving forming precision and surface quality of a metal thick plate forming piece, and relates to a method for improving quality of a metal thick plate forming piece, in particular to a method for improving forming precision and surface quality of a metal thick plate forming piece by controlling die clearance and friction coefficients. The method solves the problem that the forming precision and the surface quality of the forming pieces are different to ensure when metal thick plate parts with variable section shapes are formed by adopting the conventional bending forming technology. The method comprises the following steps of: 1, selecting clearance between a female die and a male die of a die; 2, measuring the friction coefficient; 3, determining the clearance between the female die and the male die when the metal thick plate forming piece is completely attached to the die; 4, determining the friction coefficient between a metal thick plate and the male die; and 5, performing bending forming on the metal thick plate. The method is used for bending forming of the metal thick plate.

Description

technical field [0001] The invention relates to a method for improving the quality of metal thick plate formed parts, in particular to a method for improving the forming precision and surface quality of metal thick plate formed parts by controlling the die gap and friction coefficient. Background technique [0002] Metal thick plate parts, because of their structural characteristics, such as high rigidity and wear resistance, are more and more valued by aviation, aerospace, energy and other industrial fields. The forming accuracy and surface quality of parts are the focus of attention in the industry. Due to the large deformation load and the large stress gradient on the inner and outer surfaces, the forming difficulty of thick plate parts is much greater than that of thin plate parts. In order to obtain thick plate parts with high forming precision and good surface quality, higher requirements are put forward for the forming process. Bending forming is a common process fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D5/06B21D37/18B21D37/10
Inventor 张凯锋高鹏蒋少松
Owner HARBIN INST OF TECH