Door Frame Line Changeover: Spacer Adjustment and Cutter Replacement

1. Definition

A door-frame opening changeover is the shop procedure used when the ordered frame width (opening) changes on an already installed frame roll forming host. Typical actions are spacer / sleeve adjustment to set forming width and replacement of the matching cut-off die. It is not a full machine swap and not a shutter-slat roll-set change.

Reference packages often cite shaft about φ50; heavier same-pack docs may use about φ70 with twenty-plus stands or about φ80 with roughly eighteen stands — changeover logic is the same, duty class is not.

2. Process and applications

Recommended changeover wording:

1. Stop and clear strip from the mill
2. Set spacers / sleeves to the ordered opening
3. Fit the matching cut-off die for that opening
4. Verify punch recipe for left/right, hinge, and lock if the drawing changed
5. Trial length and hole-to-edge before production

Applications. Multi-size steel door frame shops that run several openings (examples such as 115 mm and 230 mm appear in reference docs) on one host. Market practice also uses cassette tooling and modular punch dies to shorten changeovers — industry orientation only; commercial steps stay on the named proposal.

3. Reference parameters (keep sources separate)

3.1 What usually changes with opening

3.2 What does not automatically change

4. Conflicts and open items

• Opening examples vs contract sizes — 115 / 230 are documented examples, not a closed size list.
• Speed notes that include punch/cut — After changeover trials, do not treat inclusive speed wording as pure forming speed.
• Heavy vs light hosts — Same spacer logic on φ50 vs φ80 hosts; torque and cutter mass still follow the heavy proposal.

5. Boundaries (related machines)

• Frame overview / multi-spec pages — Hold kW and thickness tiers; this page is changeover only.
• Shutter slat two-profile change — Full roll-set swap on a slat host; different procedure.
• Guide / box section change — Separate section family; do not reuse frame spacer steps.

6. Buyer FAQ

Does spacer change alone cover every drawing?

No. Hole maps and punch recipes still follow the buyer drawing. Cutter match is also required for the new opening.

Is 115 / 230 the only opening pair?

No. Those sizes appear as reference examples. Contract drawings decide the openings you must support.

Do I need a second machine for a second opening?

Not always. Many frame hosts change openings by spacer and cutter. Confirm changeover time and tooling list on the proposal.

Does punch tooling always stay the same?

Only if hinge/lock positions are unchanged. When the drawing moves holes, recheck punch dies and left/right recipes.