How to accept the induction melting furnace?
The acceptance of the induction melting furnace is carried out in accordance with the technical specifications and standards. There are four steps: acceptance during the manufacturing process of the induction melting furnace, acceptance before leaving the factory, unpacking acceptance and final acceptance.
1. Acceptance during the manufacturing process of the induction melting furnace: Acceptance of the manufacturing process of each component and the materials, specifications, dimensions, etc. according to the technical specifications.
a. Acceptance during the manufacturing process of the furnace body
The supplier shall submit the main material specifications of the furnace body and the furnace body manufacturing process to the purchaser for review before the furnace body is manufactured. During the manufacturing process of the furnace body, the supplier shall call the purchaser, and the purchaser shall assign technical personnel to supervise the manufacturing process.
b. Acceptance during the manufacturing process of the induction coil
The supplier shall submit the material specification (material list) and manufacturing process to the purchaser for review before the induction coil is manufactured. During the manufacturing process, the supplier shall call the purchaser, and the purchaser shall assign technical personnel to supervise the manufacturing process.
c. Acceptance during the manufacturing process of the yoke
The manufacturer of the magnetic yoke will follow up the whole production process, including: the review of the material list; the review of the raw materials, the blanking process, the manufacturing process, and the assembly process.
d. Intermediate frequency power supply cabinet
After the intermediate frequency power supply cabinet is assembled, the buyer shall send technicians to check and accept the components, reactors, and compensation capacitor cabinets in the cabinet, and participate in the power supply debugging work.
f. Acceptance during the overall assembly process
After the production of each component is completed, the purchaser shall be notified to supervise the assembly process when the entire induction melting furnace is assembled.
If there are disagreements between the two parties during the above-mentioned acceptance process, the supplier shall propose a solution, and the supplier can proceed to the next process after the buyer recognizes that the two parties have reached a consensus.
2. Factory acceptance of induction melting furnace
The inspection and acceptance before leaving the factory is carried out by the manufacturer, and the supplier shall notify the personnel of Party A to carry out the initial inspection and acceptance in accordance with the "Induction Melting Furnace Technical Specification" and the relevant provisions of the national standard before the product is shipped. The factory inspection items are as follows:
a. Acceptance of the overall composition of the induction melting furnace;
According to the technical specifications of the induction melting furnace, check whether the configuration of the induction melting furnace meets the requirements.
b. Electrical performance inspection
Measurement of the clearance between the induction coil and the furnace shell, the insulation resistance measurement of the induction coil to the furnace shell, the insulation withstand voltage test of the intermediate frequency coreless smelting furnace, and the insulation quality inspection of the capacitor to the ground.
c. Inspection of hydraulic system;
Audit by the product manufacturer.
d. Inspection of supporting parts, including inspections of models, specifications, factory qualified certificates, and related drawings;
e. The scope of supply, including the inspection of the completeness of the factory technical documents;
f. Acceptance of installation copper bus material and size.
J. Packaging inspection.
3. Unpacking acceptance of induction melting furnace
The unpacking and acceptance work is carried out at the installation site. After all the products are delivered to the place of use, both parties shall check the quantity of the whole box according to the packing list, and check and accept the parts, accessories, and accessories of the products in each box. The name and quantity of the attached accessories and components, confirm whether the supplier is damaged or lost during transportation.
4. Final acceptance of induction melting furnace
Final acceptance is a comprehensive acceptance of product quality and performance. The time starts from the commissioning, and the relevant parameters will be assessed after the electric furnace runs normally for a week. The acceptance items are as follows:
a. Start-up acceptance of induction melting furnace
Start five times in an empty furnace state, and the success rate is 100%; start five times in a full furnace charge state, and the success rate is 100%;
b. IF power supply performance assessment
Constant power output time, DC voltage, intermediate frequency voltage, intermediate frequency current, working frequency, dual rectifier current sharing performance, reactor noise, etc. meet the technical specifications of induction melting furnace.
c. Measurement of melting temperature
The melting temperature of molten steel meets the technical specifications of induction melting furnace
d. Measurement of power consumption and melting rate of the main circuit of the furnace
The melting rate is tested by the national standard, and the average value of three consecutive heats is taken, and the upper limit shall not exceed 5%.
e. Inspection of waterway system
Check the technical parameters of the fully enclosed cooling tower, and check the cooling water circuit without water seepage. Work continuously for six heats to assess the temperature of the outlet water of the fully enclosed cooling tower.
f. Measurement of the temperature rise of the furnace body and each device under hot conditions
Continuously working for six times, the assessment of the temperature rise of each device meets the temperature rise requirements in the technical specifications of the induction melting furnace.
g. Hydraulic system
When the furnace is full, the furnace body can take off and fall smoothly, operate flexibly, and all performances meet the requirements of technical specifications. There is no leakage in the oil circuit.
h. Furnace system
The yoke and induction coil are installed in a reasonable layout, the waterway is unobstructed, and the water-cooled cable has no hard spots. The furnace frame has sufficient rigidity and runs smoothly when carrying the maximum loading.
i. Acceptance during installation
Oil circuit cleaning, green paint on water pipes, and bracket paint.
j. Project overall experience collection.
The overall installation standardization, supporting product supplier, whether the transformer performance requirements are met, and so on.
After the final acceptance is passed, the two parties jointly sign the commissioning test acceptance report.
