By Chen Hao, Senior Heavy Industrial Cell Engineer · EVST Heavy Cell Engineering Team · · Reviewed by EVST robotics integration engineering
On a forging floor, heat, steam and oil mist make extraction the hardest post to staff — and the easiest to lose. A standard industrial robot dropped beside a press is dead within six months: steam and oil mist reach the electrics, and the cell is offline before it ever paid back. The barrier here isn’t the arm, it’s the protection rating. An IP67-rated, fully sealed body with positive-pressure protection runs long-term in the forging environment; a compliant float gripper extracts the hot part without jamming the die; cycle-locked pickup keeps the press from idling. On typical deployments, the station pays back in about two years and operators leave the burn-and-fume zone for good.
Key takeaways
- Standard robot beside a forging press dies in ~6 months (steam + oil mist destroys electrics).
- IP67 fully sealed body + positive-pressure protection holds the environment long-term.
- Compliant float gripper absorbs misalignment, seats without jamming or scuffing.
- Pickup is cycle-locked to the press — opens, pickup, close, no idle.
- Operators out of the burn-and-fume zone; ~2-year typical payback (industry-typical range, sized per project).
- Industrial arm under ISO 10218; IP protection rating per IEC 60529.
This article is for forging plant owners, production managers and process engineers automating hot extraction. It covers IP67-rated tending cells on forging and casting presses; it does not cover melt handling, downstream machining, or non-hot extraction posts.
Why ordinary robots die in 6 months
A standard six-axis arm is designed for the typical machine-tending environment — dust, mild oil mist, ambient heat. A forging press throws something different: high-temperature steam from die cooling, atomised oil mist from the lubrication system, and radiated heat well above 60°C inside the cell. Three failure modes follow:
- Liquid ingress through seal lines. Standard IP54 or IP65 seals admit fine atomised oil over months. Once oil reaches the electrics, motor bearings and servo drives fail.
- Heat-cycled gasket fatigue. Daily thermal cycles flex sealing gaskets until they leak. The robot looks fine externally and quits without warning.
- Encoder contamination. Fine particulate in the oil mist coats encoders, drifting position over time until accuracy falls outside tolerance.
The fix is not a hardier standard robot. It is a different protection class.
When forging extraction automation pays off — and when it doesn’t
The decisive factors are labor burden, safety risk and protection cost. Use this frame:
| Choose IP67 forging tending when… | Reconsider when… |
|---|---|
| Heat, steam and oil mist are continuous | Cool dry environment fits standard IP54 |
| Burn and fume exposure is real injury risk | Manual extraction has acceptable safety record |
| Press cycle would idle on operator delay | Cycle is slow enough that operator pace is fine |
| Two-shift operation needed | Single-shift, low utilisation |
| Skilled extraction labor is scarce | Adequate trained workforce available |
EVST scopes a forging cell with what our engineers call the Protection-First method: size the IP rating and positive-pressure system to the actual environment first, then design the gripper and cycle interlock — because a robot that survives the environment but jams in the die, or extracts cleanly but corrodes, both fail.
Manual vs robot forging extraction
| Factor | Manual extraction | IP67 robot tending |
|---|---|---|
| Operator exposure | Heat, steam, oil mist, burns | Removed from zone |
| Extraction timing | Variable, presses idle | Cycle-locked, no idle |
| Gripping consistency | Manual tongs, scuffs | Float gripper, no scuff |
| Continuous running | One shift with fatigue | Two-shift with no drift |
| Equipment life in environment | Operator turnover | IP67 + positive pressure for long runs |
How an EVST forging tending cell is built
Three engineering details decide whether the cell survives production:
| Step | What EVST does | Why it matters |
|---|---|---|
| Protection rating | IP67 fully sealed body + positive-pressure protection sized to the line | No liquid or particulate ingress over long runs |
| Gripper design | Compliant float gripper, oxide/heat-tolerant materials | Absorbs misalignment, no jamming, no casting scuffs |
| Cycle interlock | Press door, eject and safety signals exchanged with the robot controller | Press never waits on operator reaction |
| Heat shielding | Reflective shroud over robot wrist and gripper interface | Reduces thermal load, extends gripper life |
| Maintenance access | Quick-detach gripper module + service positions | Scheduled service without breaking IP envelope |
In practice the failure we see most is treating protection as an afterthought: a standard robot dropped next to a press works in a cool demo and corrodes within months. EVST leads with the IP rating per IEC 60529 and validates the gripper against the hottest, most-contaminated condition in the cell.
The ROI: safety first, then uptime
Unlike many automation cases, the headline ROI lever here is safety: operators are pulled out of a hot, fume-laden hazard zone for good. The injury cost reduction (burns, fume exposure, repetitive strain) is the primary payback driver — typical insurance-rate impact is meaningful enough that plants with active injury claims see payback compressed.
The second lever is uptime: an IP67-sealed robot extracts around the clock, the press never idles on operator reaction time, and output rises from the same press. The third is reduced casting scrap — the float gripper eliminates the bumps and drops that manual tongs cause.
Blended, these typically deliver ~2-year payback on EVST-deployed forging tending cells. Actual payback depends on shot weight, cycle, current staffing and injury claim history; we size it per cell.
Where it applies across industries
- Automotive and new-energy — structural castings, especially large aluminum giga-castings.
- Hardware and metalware — small-to-mid forgings and die-cast pieces.
- Cookware and appliance — cookware bodies and housing castings at volume.
- Motorcycle parts — frame and engine components.
- Power tools — tool body castings.
The same protection-first logic carries because the environment — heat, steam, oil mist, hazardous reach — is identical across the cluster.
FAQ
What does IP67 actually mean? IEC 60529 defines IP67 as fully dust-tight (the “6”) and protected against temporary immersion in water (the “7”). For forging tending, this matters not because the robot is dunked, but because atomised oil mist and steam behave like fine liquid contamination — IP54 or IP65 admits enough over months to fail. IP67 holds it out.
Why positive pressure if the body is already sealed? Belt-and-braces. Even an IP67-rated body has access panels and cable glands that age. Positive pressure means internal pressure is slightly above ambient, so any small leak path lets clean air out, not contaminated air in. Standard EVST forging cells run both.
Won’t the float gripper jam in the die? A compliant float gripper absorbs small position errors (typically ±2–3 mm) in the X, Y and rotation directions, so it seats in the die clearance without jamming. Position misalignment beyond float range trips the safety stop rather than forcing the gripper. The result is no jam, no scuff.
Will it slow the press? No — when load/unload is integrated with the press cycle via door / eject / safety signals. The robot acts on the press-open signal in the same fraction of a second a fast operator would, but consistently across every shot. EVST couples the timing in scoping; we don’t bolt the robot on as a separate machine.
What about different castings? A new casting is a gripper insert and program change; the protection rating stays. Step-change geometry that has no programmable logic falls outside automatic; multi-variant within a family is handled with quick-change gripper inserts.
Is it safe? The industrial arm operates guarded to ISO 10218 inside its cell; the entire point of the cell is removing the operator from the hot hazard zone. The safety system follows ISO 10218-1 and ISO 10218-2 for the arm and integrated system.
Bringing it into your plant
Forging extraction stops being the hardest post to staff when the robot is sized to the environment, not the catalog. Lead with the IP67 protection rating and positive-pressure system, design the float gripper to the actual misalignment range, and cycle-lock to the press. EVST designs forging tending cells with the Protection-First method and integrates the sealed robot, compliant gripper and press handshake as one cell. See our guides to robot machine tending, heavy palletizing and cobot ROI payback, or talk to EVST about scoping a forging cell.
About the author — Chen Hao is a Senior Heavy Industrial Cell Engineer on the EVST Heavy Cell Engineering Team, with 13 years of experience deploying IP67 robotic cells in forging, die casting, foundry and high-temperature material-handling lines. He scopes cells around the worst-case environment first — protection rating, gripper compliance and press interlock — using the Protection-First method described above. Reviewed by EVST robotics integration engineering for technical accuracy; figures are typical achievable ranges, not guarantees, and are sized per project. Corrections and updates: see the Last Updated date.