INVT CNC Steel Hoop Bending Machine Solution for Accurate, Fast and Reliable Steel Processing

1. Background

Real estate, which has grown up with the rapid development of our country's economy, has become one of our country's pillar industries. As the backbone of buildings, steel structures have increasingly diverse structures and complex requirements. The traditional artificial rebar processing model with single products and lack of product consistency can no longer meet the needs of daily life. It adopts fully automated, professional and standardized processing methods.

The fully automatic CNC steel hoop bending machine came out in response to such social development needs. A fully automatic CNC steel hoop bending machine composed of a mechanical part and a control part. The mechanical part is divided into a rebar feeding mechanism, a rebar bending mechanism, a rebar pinching mechanism, etc.. the control part consists of a programmable controller, a servo control system, and an external coding It is composed of device, photoelectric sensor, etc.

The structure schematic diagram as below:

 
1. Feed wheel; 2. Straightening wheel; 3. Fully closed-loop wheel; 4. Fully closed-loop encoder; 5. Shearing structure; 6. Bending wheel; 7. Rebar; 8. Feed servo drive; 9. Bending servo drive;

Brief description of work process: When the rebar bending machine is powered on and started, the feeding motor rotates according to the control program, the upper row of guide wheels rotates to drive the rebar to move, and the lower row of guide wheels press the rebar under the pressure of the spring. When the rebar is fed to the designated position, the bending motor rotates forward to bend the rebar, the motor reverses the worktable to reset, and the electric rebar shearer completes a bending task.

2. Market Requirements

At present, the shortcomings of the fully automatic CNC steel hoop bending machine industry include the following points:
1. EMC issues, especially electromagnetic interference and trip issues;
2. There are few brands of high-power servo to choose from;
3. The overload capacity of high-power servo;
4. Servo motor vibration resistance.
5. Insufficient after-sales technical capabilities.

As a result, low-cost, high-efficiency, stable and reliable fully automatic CNC steel hoop bending machine solutions and comprehensive after-sales services have become new market demands in the hoop bending machine industry.
3. INVT Solution

In a mechanical equipment factory in Guangdong, the rebar diameter is Φ5~12mm. INVT provided a hoop bending machine solution of PLC + HMI + feeding servo + bending servo. It not only supports multi-turn hoop bending and rich compensation, but also can be operated manually and debugged, more convenient.

INVT Solution topology diagram

Configuration:

4. Advantages of INVT Solution

* Good product consistency and low scrap rate:

DA200 servo 2.0kHz speed response frequency, the servo motor can make dynamic response within 0.5ms, shorten the servo motor positioning setting time, improve the servo motor positioning accuracy, enable the product to ensure good consistency and reduce the scrap rate.

* Fast speed and high efficiency:
When the feeding rebar is double Φ10, the feeding speed can reach 800mm/s and the bending speed is 1000°/s. When the feeding rebar is Φ6, the feeding speed can reach 1200mm/s and the bending speed is 1100°/s.

* Large torque, stable and reliable output:
The forced cooling fan installed at the rear of the servo motor can take away the heat energy generated by the reluctance in time, so that the temperature of the servo motor is constant, no demagnetization occurs, and the output is stable and reliable.

* Good vibration resistance:
The servo motor adopts a rotary transformer encoder, which can resist the resonance effect caused by the servo motor during high acceleration and high deceleration, improve the service life of the servo motor, and reduce the failure rate in production.

* Easy debugging:
During the debugging process, the feeding servo is not connected to the fully closed-loop encoder first, and the basic parameters of the servo system are first set. After the motor has no alarm, the fully closed-loop encoder is connected. Run the fully closed-loop system at low speed, observe the relationship between the command pulse and the feedback pulse, and observe the relationship between the command speed and the feedback speed. The waveform diagram is as follows:

5.Conclusion

INVT's fully automatic CNC steel hoop bending machine solution is easy to operate and does not require repeated parameter setting. It can help customers reduce manual debugging time and effectively improve production efficiency and production speed.

In addition to hoop bending machines, INVT has been deeply involved in the field of rebar processing for many years based on market orientation. Targeting the pain points of the industry and considering customer needs, INVT can also provide seam welding machines, bending centers, 5-head bending centers, shearing lines, sawing wires, Develop solutions for rebar processing equipment such as truss production lines.