Line and press shifts rarely stop, so handover is the weak point: a fix for forging units

Mid-morning, the setter on a forging press notices the bottom die starting to grab parts. He suspects one spray nozzle is partly blocked and means to clean it after lunch. A rush order lands, he forgets, and at the shift change he says 'all fine' to the night lead on the way to the bus. Before the night crew's tea break the die has cracked. The night operator is named in the morning meeting. A month later he joins a press shop two lanes away in the same industrial area, saying he was blamed for something he never saw.

Presses, furnaces and roll lines rarely stop, so the hand-off between shifts carries more weight than any single shift. The patterns page for forging and forming HR lists weak handover among them. Few owners connect it with operator exits, but the two are linked.

• Die condition. Sticking, a hairline crack at a corner, uneven flash, a nozzle that sprays short.
• Material. A new cast or heat number, billets with surface seams, a coil nearing its end, wire that feels harder than usual.
• Furnace and heating. A setting changed to recover a cold start, a burner that keeps tripping, an induction coil running hot.
• Pending work. A first-off waiting for the inspector, a crate red-tagged for checking, a changeover half done.
• Machine faults. A hydraulic leak under the bolster, a clutch that slips, a scale conveyor that jams.
• People. A new helper on the crew, someone sent home unwell, a manipulator nursing a burnt wrist.

The plainest cost is repeat faults: the same mismatch, the same lap, the same wrong length, found twice in one day by two different shifts. Scrap and rework double. Dies crack under conditions someone had already spotted. Customer complaints arrive with no trace of who saw what. The harder cost is between people. Shifts start to blame each other, rivalry hardens, and press operators who keep inheriting trouble stop believing it is worth staying.

• No overlap. The incoming shift arrives as the outgoing one leaves for the bus.
• Tired people talk briefly. After a long shift beside a furnace, 'all fine' takes the least breath.
• Leads talk, operators do not. The shift leads exchange a word; the man at the press hears nothing.
• The log says 'OK'. Pages of ticks, with nothing about the die or the material.
• Nights are thin. No senior setter on the floor to ask, and nobody reads the log before starting.
• Nobody checks whether a repeat fault was in the note. So the note never improves.

For one week, stand beside every press and roll line at shift change and watch what is said and to whom. Read the last month of log entries and count those with anything beyond a tick. List the rejects that recurred within a day and ask whether the first shift knew. Then ask a few operators what they found on taking over a press that nobody had mentioned. Their answers make the case better than any figure.

1. 1

   Build in a short paid overlap

   Long enough for the two operators to stand at the machine together. Agree transport timing so nobody has to choose between the note and the bus.

2. 2

   Use a one-page note per press or line

   Fixed lines for die, material, furnace, pending work, faults and people. Tick boxes where possible, a few words where needed, in whichever script the crew writes.

3. 3

   Walk round the machine

   The outgoing operator shows the incoming one the die, the spray, the crate on hold. Pointing at the problem beats describing it.

4. 4

   Keep a hold board

   A board by each press showing red-tagged crates, first-offs pending and parts waiting for a decision.

5. 5

   Shift leads sign and read

   The outgoing lead signs the notes; the incoming lead reads them out at the opening huddle beside the press.

6. 6

   Review repeats weekly

   For each fault that came back, check whether the note mentioned it. Improve the note, not the scolding.

7. 7

   Stop blaming the incoming shift

   If the note missed it, the fault belongs to the handover, and the cure lies in the routine.

Machine, date and shift handing over: ______.
Die or roll set fitted, and its condition: ______.
Spray, lubricant and cooling: working, or what is wrong.
Material on the machine, with cast, heat or coil number: ______.
Furnace or heating setting, and any change made this shift: ______.
Pending: first-off, red-tagged crates, changeover status.
Faults seen and whether reported to maintenance: ______.
People: new hands, absences, anyone unwell or hurt.
Handed over by ______ to ______ at the machine.

• Hot press or hammer. Die face and corners, spray manifold, ejector, scale build-up, pyrometer reading at the furnace exit.
• Cold header. Wire tag and remaining coil, cut-off finish, punch wear, feed roll grip and the last size check.
• Draw press. Drawing compound level, blank stack and its coil tag, die cushion setting, the last cup checked for splits.
• Roll forming line. Coil tag and wraps left, any weld joint coming through, length counter setting, shear blade edge.

Two minutes at these few spots tells the incoming operator more than a column of ticks. It also gives him something specific to check before the first part, which is where repeat faults are cheapest to catch.

Furnaces that never cool and roll lines on long runs make handover harder, because nothing pauses to give a natural moment. The roll forming unit page looks at long runs and coil changes. The forged auto parts page on shifts and attendance covers overlap and cover rules. Teaching new operators to write and read a handover note belongs in induction, and a structured training calendar keeps it from being skipped.