Punching and shearing machines (also called busbar punching-shearing machines) are critical for processing copper and aluminum busbars. Proper maintenance not only extends equipment life but also ensures operator safety and consistent precision.
Below are five core maintenance tips that cover daily routines, periodic checks, and long-term care.
1. Hydraulic Oil – Regular Checks & Timely Changes
The hydraulic system is the heart of your machine. Neglecting oil quality is the fastest way to damage pumps and valves.
- First-time fill – Before initial startup, always add ISO VG 46 anti-wear hydraulic oil. Running the pump without oil will destroy it immediately.
- Routine inspection – Every 7 days, check hydraulic lines and fittings for leaks.
- Oil change rule – Replace the hydraulic oil every 3,000 operating hours or as soon as the oil becomes cloudy, milky, or visibly contaminated.
Clean hydraulic oil keeps the pump, cylinders, and valves running smoothly and prevents costly downtime.
2. Lubrication & Cleaning – Before and After Each Shift
Dirt and lack of lubrication are the main causes of premature wear on moving parts.
- Moving parts (punching & shearing stations) – Apply lubricating oil twice per shift (once before starting, once midway through the shift).
- Punching die – Clean and lubricate the die before each work session and again at the end of the day. Tighten all screws after cleaning.
- Comprehensive lubrication – Every 3 months, perform a full lubrication of all moving joints and check the hydraulic unit’s operation.
A clean, well-lubricated machine runs more accurately and generates fewer burrs or misfeeds.
3. Die & Blade Edge Maintenance – Sharpness Prevents Damage
Dull dies or blades force the machine to work harder, causing poor cut quality, burrs, and even tool breakage.
- Check sharpness regularly – Inspect punching dies and shear blades for dull edges or chipping.
- Adjust or replace in time – When sharpness decreases, adjust the clearance or replace the tooling immediately.
- Material restriction – Only process copper and aluminum busbars. Any other material (especially steel) will instantly damage the dies and void your warranty.
Sharp tooling also reduces hydraulic pressure demand and extends pump life.
4. Electrical System & Grating Ruler Care
Modern punching-shearing machines rely on precise feedback from linear scales (grating rulers) and a clean CNC control system.
- Grating ruler screws – Tighten all screws on the movable clamp’s grating ruler assembly every 7 days. Loose screws cause positioning errors and scrap parts.
- Electrical checks – Regularly inspect wiring, aviation plugs, and all components for proper operation and unusual noises (buzzing, arcing).
- CNC computer housekeeping – Clean junk files from the industrial PC once a week to keep the control system responsive and avoid freezes.
Electrical and positioning accuracy directly affect busbar hole location and cut length.
5. Follow a Graded Periodic Maintenance Schedule
Break down long-term maintenance into manageable intervals. This prevents forgotten tasks and spreads workload.
| nterval | Action |
| Every 3 months | Add lubricating oil, test hydraulic unit action, inspect all hydraulic hose fittings. |
| Every 6 months | Test hydraulic unit action again, replace the low-pressure oil filter. |
| Every 12 months | Full machine service, lubricate main body and structural parts, check conveyor belt tension (to prevent breakage). |
Following this schedule reduces unexpected breakdowns and keeps the machine in like-new condition for years.
Special Safety Reminders
- Do not adjust limit switches, pressure settings, or fixed CNC parameters unless you are a qualified technician. Unauthorized changes can make the machine inoperable.
- Correct shutdown sequence – Always turn off in this order:
- Emergency stop on each station
- Operator panel power switch
- Electrical cabinet circuit breaker
- Main power supply
Ignoring the shutdown sequence may cause electrical damage or unexpected restart hazards.
Final Word
These five core maintenance tips – hydraulic oil care, shift-based lubrication, tool edge sharpness, electrical/grating ruler checks, and graded periodic schedules – will maximize your punching and shearing machine’s reliability. Regular attention also keeps operators safe and output quality high.
