Vacuum sintering furnace safety operation procedures

Vacuum sintering furnace safety operation procedures

Vacuum sintering furnace is heated objects to make use of induction heating protective sintering furnace, can be divided into the power frequency, medium frequency, high-frequency, such as type, can be ascribed to a subclass of vacuum sintering furnace. Vacuum induction furnace is under vacuum or protective atmosphere conditions, using the principle of intermediate frequency induction heating make hard alloy tool bit and all kinds of metal powder compacting sintering of complete sets of equipment, is for hard alloy, metal dysprosium, designed in the industrial production of ceramic materials.
Vacuum sintering furnace safety operation procedures
1. Medium frequency induction coil, power supply, vacuum furnace, cooling water, the water of reservoir must be filled with water can not have impurities.
2. To start the pump, that its frequency power, vacuum induction coil, furnace, furnace cooling water circulation system is normal, and adjust the water pressure control in the specified value.
3. Check the vacuum pump power supply system, the pulley belt tightness, vacuum pump oil is located in the oil seal observation hole centerline. Check completed after artificial turn the vacuum pump pulley, without exception, but in the case of closing butterfly valve, vacuum pump.
Within 4. Check the vacuum furnace, vacuum furnace in the level of health, good insulation, induction coil, vacuum sealing tape elastic, qualified size.
5. Check the lever handle to start the vacuum furnace is flexible.
6. Check the rotation type McLeod gauge whether accord with requirement.
7. Check the graphite crucible, furnace charging accessories are complete.
8. After more than ready, connected to the power supply, intermediate frequency power supply switch, started in the intermediate frequency rules, try to start the inverter, success after the stop frequency, before blowing in.
9. Observation, the thermometer hole of the vacuum furnace cover, each furnace must be clean processing, in order to observe and temperature measurement.
10. According to different sintering furnace charging products, adopt corresponding furnace charging mode. According to relevant material plate furnace charging rules, do not get optional change.
11. In order to maintain constant temperature, prevent heat, hot pot and add carbon fiber on the second floor, cover on heat insulation screen again.
12. Good vacuum sealing tape.
13. The operating lever handle, turn the vacuum furnace top cover closely coincide with furnace body, put down the lid, and fixed lock nut.
14. Slowly open the butterfly valve, smoked furnace, air and vacuum degree reach the specified value.
15. After vacuum to specified requirements, to start frequency, adjustment of intermediate frequency power, as stipulated in the relevant material of sintering operation; Heating, heat preservation cooling.
16. After sintering, the stop frequency, the stop frequency conversion switch, inverter stop working, and disconnect the medium frequency power supply points total brake brake and power off.
17. After observed from furnace furnace black hole observation, turn off and disconnect current vacuum pump, vacuum butterfly valve and tap water to cooling and induction coil, furnace, finally stop the pump.
18, intermediate frequency voltage 750 v electric shock risk. In the whole operation and inspection process, must pay attention to the safety operation, do not contact with the hand intermediate frequency electric cabinet.
19. In the process of sintering, induction coil, at any time from the furnace side hole to observe whether put arc phenomenon, if discovery is unusual phenomenon, should immediately report relevant personnel processing.
20. Start the vacuum butterfly valve should be slow, otherwise you will take oil by extraction, rapid, adverse consequences.
21. The correct use of rotary McLeod gauge, otherwise it will cause the vacuum reading error or mercury resulting from operation, rapid overflow caused by public nuisance.
22. Pay attention to the safe operation of the vacuum pump pulley.
23. In the vacuum sealing tape, cover furnace roof, pay attention to prevent pressure hand.
24. All that under the condition of vacuum, volatile affect vacuum health, pipes get clogged, or vacuum pump caused by dirty workpiece or container, not charging.
25. All products with forming agent (such as oil or paraffin, must take off before charging sintering, otherwise it will cause adverse consequences.
26. The whole sintering process, must pay attention to the water meter pressure range and cooling water circulation, so as to avoid an accident.