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Precision casting molding method for complex thin-walled member

A technology of precision casting and forming method, which is applied in the precision casting and forming of complex thin-walled castings, and can solve the problems of waste of metal materials, energy consumption and man-hours, and low production efficiency, so as to improve the cost performance of products and achieve huge economic Benefit, the effect of saving a lot of materials

Active Publication Date: 2011-04-20
XIAN SUPERCRYSYAL SCI TECH DEV CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the upper tube sockets of nuclear reactors are generally made of a whole piece of stainless steel through precision numerical control processing, resulting in serious waste of metal materials, low production efficiency, low yield, and a large amount of energy and man-hours consumption. This not only makes the cost of the upper tube sockets particularly high. Moreover, there is no guarantee for urgent production problems

Method used

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  • Precision casting molding method for complex thin-walled member
  • Precision casting molding method for complex thin-walled member
  • Precision casting molding method for complex thin-walled member

Examples

Experimental program
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Effect test

Embodiment 1

[0035] According to this embodiment figure 1 The process flow chart shown is carried out, the specific steps are as follows:

[0036] 1) Design and manufacture of wax molds: design and manufacture metal wax molds according to the upper tube socket of the nuclear reactor, specifically, the draft angle is determined to be 3', and the shrinkage of the casting is 1.5%;

[0037] 2) Press the wax mold: Use the wax mold mold made in the previous step and the wax press machine to press the wax mold of the upper tube seat of the nuclear reactor, the pressing temperature is 70 ° C, and the pressing pressure is 0.4 MPa;

[0038] 3) Design and production of pouring system: the structure of pouring system is as follows: figure 2 As shown, a wax press machine is used to press the above-mentioned sprue cup 1, cross runner 2, sprue 3 and ingate 4 respectively;

[0039] 4) Group type: Use liquid wax to make the wax mold pressed in step 2) and the sprue cup 1, cross runner 2, sprue 3 and ing...

Embodiment 2

[0048] 1) Design and manufacture of wax molds: design and manufacture metal wax molds based on the sockets of nuclear reactors. Specifically, the draft angle is determined to be 1.5°, and the casting shrinkage is 2.3%;

[0049] 2) Press the wax mold: use the wax mold mold made in the previous step and the wax press machine to press the wax mold of the upper tube seat of the nuclear reactor, the pressing temperature is 75 ° C, and the pressing pressure is 0.55 MPa;

[0050] 3) Design and production of pouring system: the structure of pouring system is as attached figure 2 As shown, a wax press machine is used to press the above-mentioned sprue cup 1, cross runner 2, sprue 3 and ingate 4 respectively;

[0051] 4) Group type: Use liquid wax to make the wax mold pressed in step 2) and the sprue cup 1, cross runner 2, sprue 3 and ingate 4 pressed in the third step according to the attached figure 2 The structure shown is bonded to form a whole;

[0052] 5) Sand hanging: use 70 ...

Embodiment 3

[0060] 1) Design and manufacture of wax molds: Design and manufacture metal wax molds according to the upper tube socket of the nuclear reactor. Specifically, the draft angle is determined to be 3°, and the shrinkage of the casting is 3%;

[0061] 2) Wax mold pressing: Use the wax mold mold and wax press machine made in the previous step to press the wax mold of the upper tube seat of the nuclear reactor, the pressing temperature is 80°C, and the pressing pressure is 0.7MPa;

[0062] 3) Design and production of pouring system: the structure of pouring system is as attached figure 2 As shown, a wax press machine is used to press the above-mentioned sprue cup 1, cross runner 2, sprue 3 and ingate 4 respectively;

[0063] 4) Group type: Use liquid wax to make the wax mold pressed in step 2) and the sprue cup 1, cross runner 2, sprue 3 and ingate 4 pressed in the third step according to the attached figure 2 The structure shown is bonded to form a whole;

[0064] 5) Sand hangi...

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Abstract

The invention discloses a precision casting molding method for a complex thin-walled member. The method comprises the following steps of: 1) manufacturing a wax die; 2) pressing the wax die; 3) designing and manufacturing a pouring system; 4) forming: bonding the wax die pressed in the step 2) and a sprue cup, a cross gate, a sprue and an in-gate pressed in the step 3) by adopting liquid wax to form a whole; 5) coating sand; 6) roasting a die shell: roasting the die shell in a box-type electric resistance furnace, taking out the die shell after the roasting is finished, and cleaning residues in the cavity of the die shell; 7) smelting and casting; 8) clearing a casting; and 9) obtaining a complex thin-walled member product after thermal treatment. A nuclear reactor tube seat close to the required geometric dimension is obtained by adopting a direct casting mode in the method; and the manufacture of the tube seat can be finished only by a little machining operation after the method is adopted, so the manufacturing cost of the tube seat is remarkably reduced.

Description

technical field [0001] The invention belongs to metal casting technology, in particular to a precision casting molding method, especially a precision casting molding method suitable for complex thin-walled castings. Background technique [0002] There are more than 100 special-shaped water holes and installation holes at the bottom of the upper tube seat of the nuclear fuel reactor. complex thin-walled components. At present, the upper tube sockets of nuclear reactors are generally made of a whole piece of stainless steel through precision numerical control processing, resulting in serious waste of metal materials, low production efficiency, low yield, and a large amount of energy and man-hours consumption. This not only makes the cost of the upper tube sockets particularly high. And it can't guarantee the problem of urgent production. Contents of the invention [0003] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art,...

Claims

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Application Information

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IPC IPC(8): B22C9/04
Inventor 周中波李小军邓军张利军薛祥义常辉
Owner XIAN SUPERCRYSYAL SCI TECH DEV CO LTD
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