A dual-wire rebar stirrup bender may suit plants that repeatedly produce common smaller-diameter stirrups and want to increase output per shift. Using the HH4-14S dual-wire application as an example, this guide explains how to assess fit through material specifications, product drawings, and cycle-time testing. It is a selection case analysis; the actual solution and output should be confirmed by testing the intended materials at the site or with the supplier.
Check the application before choosing a dual-wire machine
List the bar diameters, steel grades, product shapes and dimensions, daily target quantity, coil or bar supply, and available feeding space. Both wires in dual-wire mode must meet the machine’s application range and consistency requirements. The phrase “dual-wire” does not mean that every product can be made in pairs. Send representative drawings to the manufacturer and confirm bending angles, leg lengths, cut positions, and allowable tolerances to reduce misunderstandings.
HH4-14S dual-wire range and listed configuration
Haihui product information lists the HH4-14S for 4–14 mm single-wire processing and 4–10 mm dual-wire processing. The listed configuration includes a 20 kW VEICHI feeding servo, um 7.5 kW VEICHI bending servo, and a XINJE PLC. A reference output of about 2,000 pieces per hour is listed for a 20 × 20 mm working condition. This is a reference for a specific setup, not a promise that different diameters, shapes, and materials will achieve the same output.
Use sample testing to establish a realistic cycle time
Choose a representative item from regular production and run a continuous test. Record the run time, accepted pieces, rejects, changeover time, and number of operators. Confirm steel grade and diameter before the test. Durante a operação, observe whether the two feeds remain synchronized, bending angles stay consistent, and cut ends meet the requirements. Keep the samples, drawings, acceptance criteria, and test conditions together as a reference for delivery acceptance.
- Test common single-wire and dual-wire sizes; do not decide from peak speed alone.
- Confirm which shapes and programs are available for each bar diameter.
- Define output as accepted finished pieces and state whether loading and downtime are included.
- Check machine footprint, feeding direction, finished-product space, and safe access.
When is a dual-wire solution worth evaluating?
If most orders are for smaller stirrups within the listed range and materials, drawings, and production plans are reasonably stable, a dual-wire setup may be worth validating. If sizes change frequently or larger bars are common, compare single-wire and dual-wire efficiency for the actual order mix and ask the manufacturer whether another model is more suitable. Before purchase, confirm configuration brands, lead time, spare parts, treinamento, warranty, and after-sales arrangements.
Frequently asked questions
What is the HH4-14S dual-wire range? The listed range is 4–10 mm. Verify suitable shapes and materials against the actual drawings.
Is 2,000 pieces per hour for 20 × 20 a guaranteed output? It is a reference working condition in the product information, not a guaranteed rate for every order. Confirm output with agreed materials, samples, and a test procedure.
Haihui Machinery can review a buyer’s bar specifications and stirrup drawings to confirm an automatic rebar stirrup bender configuration and test plan.