Direct-heating type hot-pressing equipment suitable for producing large-size beryllium materials

Abstract

The invention discloses direct-heating type hot-pressing equipment suitable for producing large-size beryllium materials. The direct-heating type hot-pressing equipment is characterized in that a capacitance on-site compensation device is additionally arranged on a circuit system of an existing 300-ton hot-pressing furnace. The invention provides an equipment capacity expansion method for machining a beryllium material product with the diameter being 300-400 or even larger, and the technical difficulties of the equipment capacity for direct-heating type large-size beryllium material machining are broken through. In addition, the direct-heating type hot-pressing equipment has the advantages that the safe starting and producing capacity of the equipment is achieved, the heating capacity of the equipment is improved, and the rate of finished products is increased.

Description

Technical field [0001] The invention belongs to the technical field of powder metallurgy equipment, and particularly designs a direct heating type hot pressing equipment suitable for the production of large-size beryllium materials. Background technique [0002] The heating method of beryllium material hot pressing equipment is divided into direct heating and indirect heating: direct heating refers to the heating method in which the material is directly heated by electric current; indirect heating is the heating of the equipment heating body is transferred to the material. The method of being indirectly heated; hot pressing is a process in which the metal powder is heated to a certain temperature to soften, and then a certain pressure is applied to make the metal powder compact and sintered. At present, the core equipment of the direct-heating hot-pressed beryllium production line is a 300-ton hot-pressing furnace. The advantages of this process equipment are: metal powder mater...

AI Technical Summary

Problems solved by technology

The heating capacity of the existing equipment: 890°C, the heating rate above 800°C is only 0.08°C / min

[0005] Moreover, the existing equipment also has the following defects: 1. The equipment has an overheating failure of the whole machine and cannot be started up normally; Furnace shutdown due to unsafe conditions such as overheating or smoke

2. The input power in the equipment furnace is low, and the intensity of electromagnetic radiation seriously exceeds the standard; the reactive power loss reaches 60-70%, and the input power in the furnace only reaches 30% of the power supply; the power factor is extremely low: 0.37-0.4; 1 meter in front of the furnace, the column , The induction current of the base reaches 500A; the electromagnetic radiation intensity: 836 microtex, nearly 8 times higher than the national standard of 100 microtec

3. The uniform temperature control of the equipment process and the mold design are not perfect

The degree of automation of the equipment is low, and only one point of temperature measurement and control circuit is set up. The heating uniformity of the material is controlled by manual experience, and the product quality is very easy to fluctuate; the design of the equipment mold is not perfect, and the shrinkage of the male and female molds is inconsistent.

During the heating and cooling stages of the original hot pressing process, the product is easily broken and scrapped due to uneven shrinkage

4. The equipment protection facilities are not perfect, and there are potential safety hazards

There is no automatic alarm protection device for cooling water shortage. In the high temperature stage, there are potential safety hazards such as electrode punches and other high-temperature components that may be burned or exploded due to water failure; there is no electrode grounding arc protection device, and punches and punches have occurred due to electrode grounding short circuits. Furnace body punch shaft sleeve damage accident

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