The following is a systematic maintenance guide for precision casting equipment, which summarizes the key points of daily maintenance, periodic inspection, and fault prevention, classified according to equipment types: Precision Casting Equipment Systematic Maintenance Guide

🔧  1、 Special maintenance of core equipment
1. Wax injection machine
Spray nozzle cleaning: Clean residual wax material after each use to prevent blockage (alcohol wiping+air gun blowing);
Temperature calibration: Low temperature wax spraying (≤ 45 ℃) requires daily calibration of the temperature control meter with a deviation of ≤± 1 ℃;
Hydraulic monitoring: The wax injection pressure should be maintained at 0.4-0.6MPa, and maintenance should be carried out immediately if the pressure fluctuation exceeds ± 5%. Guidelines for Systematic Maintenance of Precision Casting Equipment
2. Shell making equipment
Mechanical arm joint: Inject high-temperature resistant grease (temperature resistance ≥ 150 ℃) every week;
Drying line control: environmental humidity ≤ 30%, clean the air duct weekly to prevent dust accumulation;
Sand screen: Check the uniformity of sand particles after each shift, and replace if the blockage exceeds 10%. Guidelines for Systematic Maintenance of Precision Casting Equipment
3. Smelting furnace
Induction coil: Check the flow rate of the cooling water circuit every month, and if the scale thickness is greater than 0.5mm, it needs to be pickled;
Crucible maintenance: Measure the wall thickness after 50 melting cycles, and replace it if the wear exceeds 20% of the original thickness.
4. Dewaxing kettle
Sealing test: Conduct a weekly pressure test of 0.7MPa and maintain it for 10 minutes. If the pressure drop is less than 0.02MPa, it is considered qualified;
Energy saving maintenance: Clean the carbon deposits on the electric heating tube every quarter, and a 15% increase in energy consumption indicates aging. Guidelines for Systematic Maintenance of Precision Casting Equipment
⚙️  2、 General Maintenance Procedures
Daily inspection required
Project Operation Standards
The oil level of the hydraulic system is at the center line of the scale, and the oil temperature is ≤ 55 ℃ (with an over temperature alarm and immediate shutdown)
Lubricate the elbow mechanism/guide rail with oil, and the contaminated area of oil stains is less than 5cm ²
Safety device emergency stop button/protective door sensor function test (response time<1 second) System maintenance guide for precision casting equipment
Periodic deep maintenance
Hydraulic oil management:
Filter impurities every 2000 hours, and replace if the viscosity changes by ± 15% or the acid value is greater than 1.5mgKOH/g;
Clean the fuel tank filter after running the new machine for 500 hours, and replace it every 3000 hours thereafter.
Electrical system:
Quarterly tightening of wiring terminals, insulation resistance ≥ 5M Ω;
Anti static tools are required for dust removal in the control cabinet, and direct blowing of compressed air is prohibited. Guidelines for Systematic Maintenance of Precision Casting Equipment
🛡️  3、 Fault prevention and emergency response
Emergency plan for common fault prevention measures
Wax mold deformation wax injection temperature closed-loop control (PID parameters optimized weekly), activate backup nozzle and calibrate mold temperature
During the cracking and dewaxing stage of the shell, the gradient heating (rate ≤ 3 ℃/min) is applied and the furnace is immediately shut down to investigate steam pressure fluctuations
Alloy pre baking (200 ℃ × 2h dehumidification) before gas hole melting of die-casting parts, vacuum melting and pouring, argon slag removal
📌  4、 Management standards and personnel requirements
Four fixed principles:
Assign operators, maintenance teams, maintenance procedures, and spare parts inventory;
Skill training:
Operators need to master the recognition of equipment structure diagrams and diagnosis of abnormal vibrations (monthly assessment); Guidelines for Systematic Maintenance of Precision Casting Equipment
Archive management:
Maintenance records include: lubrication time/oil type/batch of replaced parts (kept for ≥ 5 years).

Key data: Standardized maintenance can reduce equipment failure rates by 40% and extend lifespan by 30%.