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Variable-frequency vibration forming process for carbon electrodes

A technology of carbon electrode and frequency conversion vibration, which is applied in forming indenters, ceramic molding machines, manufacturing tools, etc., can solve the problems of high internal quality defect rate, high vibration frequency, long vibration time, etc., to improve production efficiency and product quality Effect

Active Publication Date: 2012-09-19
河北顺天电极有限公司
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AI Technical Summary

Problems solved by technology

[0002]At present, the vibration forming process of the electrode generally adopts a unified high-frequency vibration process of 1100-1150 r / min (18.3-19.2 Hz), and quickly pressurizes to the rated Pressure, vibration time of more than 15 minutes, high vibration frequency, long vibration time, the volume density of the electrode green body produced by this process is 1.68-1.70g / cm3, the internal quality defect rate is high, and the in-use Breakage accident rate reached more than 5%

Method used

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Experimental program
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Embodiment Construction

[0030] The specific steps of the frequency conversion vibration forming process of the carbon electrode in this embodiment are as follows:

[0031] (1) Die-in vibration

[0032] (1) Put 4.7 tons of kneaded carbon electrode paste (the diameter of the formed electrode is 1250mm) into the mold of the two-way hydraulic vibration molding machine, and divide it into two parts. The first part is 75% of the total amount, and the second part is The material is 25% of the total amount; the excitation force of the two-way hydraulic vibration molding machine used in this embodiment is adjustable from 0-2200KN, the amplitude is 0-4mm, the vibration frequency is 0-50HZ, and the maximum hydraulic pressure is 20MPa; when the first part of the material is placed, the The speed of the governor increases from 0 to 700r / min in 3-5 seconds, and the feeding speed is 0.5-1 ton / min.

[0033] (2) When loading the second part of the material, increase the speed of the governor from 700 r / min to 1100-1...

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Abstract

The invention relates to a variable-frequency vibration forming process for carbon electrodes and is applicable to vertical vibration forming of electrodes with diameters ranging from phi 800mm to phi 1400mm. The variable-frequency vibration forming process includes four stages including mold entering vibration, lower-frequency transformation, lower-frequency high pressure and high-frequency high pressure. Vibration time, compared with the prior art, is shortened by 5 to 8 minutes, green-pressing volume density of the processed electrode is improved from 1.68 g / cm<3> to 1.70g / cm<3>-1.72g / cm<3>, no internal quality defects and no breakage accidents are caused in use,, and producing efficiency and product quality are improved.

Description

technical field [0001] The invention relates to a carbon electrode frequency conversion vibration molding process, which is suitable for vertical vibration molding of φ800-φ1400mm electrodes. Background technique [0002] At present, the vibration molding process of the electrode generally adopts a unified high-frequency vibration process of 1100-1150 r / min (18.3-19.2 Hz), which is quickly pressurized to the rated pressure at one time, and the vibration time is more than 15 minutes. The vibration frequency is high and the vibration time is long. , the volume density of the electrode green body produced by this process is 1.68-1.70g / cm 3 , the internal quality defect rate is high, and the fracture accident rate in use reaches more than 5%. Contents of the invention [0003] The purpose of the present invention is to provide a variable frequency vibration forming process for carbon electrodes with high volume density of electrode green bodies and low internal quality defect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B1/087B28B3/08
Inventor 王金铎杨海春唐济革陶国新李鹏卢国成
Owner 河北顺天电极有限公司
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