EDGEBIC for Forging Shops: Press and Furnace Scheduling

EDGEBIC schedules a forging shop by treating the forge press as the constraint, feeding it from the heat furnace in dependency order, pricing die changeovers in a setup matrix, and anchoring jobs so ship dates hold. EDGEBIC by User Solutions brings finite-capacity scheduling to a shop where the press, not the number of orders, sets the real output limit. This post shows how it fits an open-die or closed-die forging operation.

Where a Forging Shop Loses Time

A forging shop heats billets in a furnace, forges them on a press or hammer, trims flash, then heat treats and finishes. The press is almost always the plant's constraint. It is the most expensive asset, the slowest step for most parts, and the one every job has to pass through.

Two failures waste it. First, the press starves and floods: heated stock is not ready when the press is free, or the furnace over-produces and billets cool in a queue while the press catches up. Second, the press loses time to die changes when jobs run in due-date order without regard for which die each one needs. Because press hours are the constraint, both losses come straight off the top of what the plant can ship. EDGEBIC schedules the whole shop to protect the press.

Scheduling the Press as the Constraint

Flag the forge press as the bottleneck and anchor its jobs to a target date, and EDGEBIC schedules the rest of the routing around the press instead of treating it like any other machine. This is theory of constraints scheduling applied to a forge: the constraint sets the pace, and everything upstream and downstream is planned to keep it running.

The scheduler protects the press with buffers. A feeding buffer on the furnace and preparation steps absorbs upstream variation so a late billet does not starve the press, and a shipping buffer toward the due date absorbs downstream variation so trim and heat treat delays do not blow the ship date. The mechanics are covered in how to flag and schedule around a bottleneck and in more depth in EDGEBIC TOC anchor scheduling. The underlying idea is production bottleneck identification.

Coordinating the Heat Furnace

The furnace and the press have to move together. Model the routing as heat then forge then trim then heat treat, and EDGEBIC schedules the steps in dependency order so forging never starts before the billet reaches temperature. It does this across your shifts, covered in multi-shift scheduling.

A batch furnace that holds a charge at temperature is set to run one load per cycle, so the scheduler never promises it to two charges at once. Paced against the anchored press, the furnace heats stock so it is ready as the press frees up rather than over-producing billets that cool in a queue. The same coordination that a heat treating shop uses for its furnaces applies to the forge furnace feeding a press.

The Die Changeover Matrix

Die changes on a forge press are sequence-dependent and expensive, because a new die often needs warm-up before the first good part. EDGEBIC records the cost of each job-to-job die change in a sequence-dependent setup matrix per press:

The scheduler campaigns jobs that share a die so the press forges everything on that die before swapping, and because press time is the constraint, every avoided swap is recovered forging capacity. Due dates stay the priority; the matrix stops a careless order from costing you swaps you did not need. The general mechanism is the EDGEBIC setup matrix.

A Worked Example: Protecting the Press

Consider a shop where the press runs at capacity but the furnace over-produces early in the shift. Heated billets cool in a queue, and by afternoon the press is waiting on freshly heated stock that the furnace, now behind, cannot supply fast enough. The press logs idle hours it should never have.

Anchor the press jobs and pace the furnace to feed it, and EDGEBIC schedules heating to arrive just as the press needs it. The furnace stops front-loading, the press stops starving, and the feeding buffer covers the normal variation between them. The recovered press hours are real capacity, produced by scheduling the furnace to serve the constraint rather than run flat out.

Records and an Honest Boundary

EDGEBIC schedules production as jobs through their routing and records the planned and actual production for each, and its append-only change history preserves how the plan evolved. Operators log actual completion on a shop-floor kiosk, so a heat that ran long or a forging that scrapped is captured as a measured duration, and a reschedule around it never moves work that already ran.

The honest boundary: EDGEBIC schedules and records production. It is not a metallurgical, die-design, or quality management system. What it gives a forging shop is the scheduling backbone, a constraint-first plan that protects the press, a furnace coordinated with forging, and a setup matrix that campaigns dies.

The Takeaway for a Forging Shop

Your plant output is your press output. Schedule the press as the constraint, feed it from the furnace in dependency order, campaign die changes, and protect it with buffers, and the press hours you were losing to starvation and swaps become forgings you can ship. That is the practical value EDGEBIC brings, grounded in the finite-capacity engine that has served demanding manufacturers since 1991. For the fundamentals, see what is production scheduling.

Ready to protect your press? Contact US for a demo and bring one week of press, furnace, and die-change records.