The CNC stirrup bending machine can automatically straighten, measure, bend, and cut coiled rebar in one pass, requiring only one worker to operate. One automatic stirrup bender can match the output of 4–6 skilled workers, greatly reducing labor costs while ensuring the dimensional accuracy and angle consistency of every stirrup. This article will cover the working principle, key features, applications, and selection tips for the stirrup bending machine.
The working process of the stirrup making machine is a highly automated continuous operation with four main steps:
Step 1: Automatic straightening Coiled rebar is fed directly without a pay-off stand, just like a standard straightening machine. The rebar passes through horizontal and vertical straightening wheel sets (auto adjustable) and four traction wheels driven by servo motors, which straighten the coiled bar to a standard straight line.
Step 2: Digital length measurement The straightened bar is measured precisely by a digital measuring system. Based on the preset shape parameters, the system calculates the feed length for each section with an accuracy of ±1mm.
Step 3: Hydraulic/servo bending The bending arm, driven by a servo motor, rotates and extends at high speed to perform multi angle bends according to the preset shape. Maximum bending angle is ±180°, bending speed up to 1000°/s, and angle accuracy ±1°. The machine can store complex shapes with up to 60 bends, supporting one pass forming of various stirrup shapes and contours.
Step 4: Sliding cutting The cutting system uses a sliding blade design. Unlike traditional cutting, this structure avoids extra wear when processing small stirrups, ensuring clean cuts every time. Throughout the process, the straightening speed automatically matches the bending speed, and all steps are seamlessly linked.
What Are the Key Features of the YG Stirrup Bending Machine?
Feature 1: Dual system straightening for high accuracy Two independent horizontal and vertical straightening wheel sets, together with four servo driven traction wheels, ensure that every bar is perfectly straight before bending. The straightening accuracy of the automatic stirrup machine directly determines the final size consistency of the stirrups.
Feature 2: Servo driven bending and cutting – high speed and precision Both the bending arm and the cutting mechanism are driven by independent servo motors. The bending arm rotates and extends rapidly, while the cutting unit acts quickly, so that both bending accuracy and length accuracy are achieved at the same time.
Feature 3: Mature control system with self diagnosis The machine uses a PLC industrial controller with a user friendly touchscreen interface. The system has fault detection and alarm functions, quickly locating problems to reduce downtime. Its stability has been proven in many field applications.
Feature 4: Rich shape library for complex stirrups Up to 60 bend shapes and contour patterns can be designed and stored. The built in library allows quick recall, supporting mixed production of multiple types and large batches. Shape changes are made by simply selecting on the touchscreen – no mechanical adjustments needed.
Feature 5: Continuous production without interruption The automatic stirrup bender can process various stirrup shapes in a continuous run without stopping for mechanical changes, even when adjusting bending angles. This maximizes production efficiency.
Q1: What types of rebar can the stirrup bending machine process? A: The YG series supports cold rolled and hot rolled bars, including plain and ribbed rebar. Single line max diameter is 18mm plain / 16mm ribbed; double line max is 14mm plain / 12mm ribbed.
Q2: How many workers are needed to operate an automatic stirrup bender? A: Only one worker is needed for the entire operation – from feeding coiled rebar to outputting finished stirrups. One worker handles feeding and touchscreen control, and the output equals that of 4–6 traditional manual workers.
Q3: Can it process complex stirrup shapes? A: Yes. The machine supports design and storage of shapes with up to 60 bends. The built in library covers common shapes, and custom shapes can be entered for special requirements.
Q4: How is processing accuracy ensured? A: Length accuracy ±1mm, angle accuracy ±1°. Dual system straightening ensures bar straightness, and servo driven bending and cutting keep every step under precise control.
Q5: Does coiled rebar require a pay off stand? A: No. The YG automatic stirrup machine feeds just like a standard straightening machine – coiled rebar goes directly in, which is ideal for tight construction sites.
Q6: Does the machine need both electric and pneumatic supplies? A: Most models require compressed air at ≥0.8MPa for auxiliary clamping and cutting. Models YG 3 and YG 5 14S do not need a pneumatic system.
Contact YG
Looking for an efficient stirrup bending machine solution? YG offers six models from YG 1 to YG 5 16S, covering bar diameters from 4mm to 18mm. Whether for daily stirrup production on building sites or precision processing for bridges and tunnels, the YG automatic stirrup bender delivers high precision, high efficiency, and low labor costs. Contact YG today for model selection advice and a quote tailored to your project.
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