Method for reinforcing strength of sand core used for car hot stamping mould and obtained by 3D (three-dimensional) printing

A technology of hot stamping dies and 3D printing, which is applied in cores, manufacturing tools, casting molding equipment, etc., and can solve problems such as insufficient high-temperature strength of coated sand cores

Inactive Publication Date: 2015-06-17
DALIAN UNIV OF TECH
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Problems solved by technology

[0005] The invention proposes a method for strengthening the strength of a 3D printed automobile hot stamping mold sand core, which solves the problem of insufficient high temperature strength of the coated sand core during pouring

Method used

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  • Method for reinforcing strength of sand core used for car hot stamping mould and obtained by 3D (three-dimensional) printing
  • Method for reinforcing strength of sand core used for car hot stamping mould and obtained by 3D (three-dimensional) printing
  • Method for reinforcing strength of sand core used for car hot stamping mould and obtained by 3D (three-dimensional) printing

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Embodiment Construction

[0013] The specific implementation manner of the invention will be further described below in conjunction with the accompanying drawings and the technical scheme.

[0014] When the hot stamping mold is pouring, because there are water channels inside, it will be divided into sand mold and sand core part during parting. Such as figure 1 part of the sand core. Since the printing material is coated sand, the coated sand core may break when the molten steel is poured, so the sand core needs to be strengthened. Before printing, leave a conformal through hole or channel in each single water channel in the sand core CAD data, as shown in Figure 2(a) to leave a conformal through hole in the water channel sand core, as shown in Figure 2( b) To leave a conformal channel in the channel sand core. Then convert the CAD data into 3D printing data for printing. There are through holes or through grooves in the printed sand cores, and then molybdenum wires are embedded in the through holes...

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Abstract

The invention provides a method for reinforcing the strength of a sand core used for a car hot stamping mould and obtained by 3D (three-dimensional) printing. A coated sand mould and the sand core required for casting the stamping mould are printed by utilizing 3D printing equipment, and a high-precision casting blank of the hot stamping mould provided with a conformal cooling water channel can be obtained after pouring. But a printing material is coated sand, resin in the coated sand loses efficacy at about 600 DEG C, and the strength of the sand core obtained by 3D printing is reduced at a high temperature, so that the sand core needs to be subjected to strength reinforcement treatment. The invention provides a method for penetrating the sand core by a molybdenum wire or burying the molybdenum wire in the sand core and enabling the molybdenum wire to serve as a core bar, so that the heat resistance time of the sand core at the high temperature can be prolonged and the hot stamping mould in which the cooling water channel is completely unblocked can be obtained.

Description

technical field [0001] The invention relates to a method for strengthening the strength of a 3D printed automobile hot stamping die sand core, which belongs to the field of hot stamping die forming and manufacturing. Background technique [0002] As the core equipment in the hot stamping production line, the hot stamping die is not only used for forming, but also for cooling and quenching of parts. The mold has a cooling system to achieve quenching and ensure the continuous cooling capacity of the mold. The design optimization of the cooling water channel inside the mold and the realization technology of the hot stamping die following the optimized water channel are the key points and difficulties in the design and manufacture of the hot stamping die. [0003] 3D printing, also called rapid prototyping, uses three-dimensional CAD data to accumulate layers of materials into solid prototypes through rapid prototyping equipment. Rapid prototyping technology has powerful model...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/12B22C9/10
CPCB22C9/106
Inventor 姚山童强张雪李鑫
Owner DALIAN UNIV OF TECH
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