Unit Configuration and Performance Overview
    This unit is a specialized equipment designed for producing cold-rolled double-sided ribbed steel bars. The production line is capable of processing Q235 hot-rolled round wire rods (Figure 1) with diameters ranging from Φ6.5 mm to Φ14 mm, and cold-rolling them into ribbed bars featuring crescent moon-shaped ribs on both sides (Figure 2).

                   Figure 1                                                                                                Figure 2 

     The complete set of equipment consists of a pay-off stand, straightening and guiding cage, descaler, pre-rolling mill, main rolling mill, straightener, heating device, temperature measuring unit, shearing machine, sliding guide, dual-side receiving unit, pneumatic automatic leveling pusher, and take-up machine. The unit is designed for continuous operation, with the entire system controlled by a PLC.

   Brief introduction of unit configuration and performance

(1) The pay-off stand ensures the high-speed operation of the unit. 

   It consists of dual payoff tubes: one is the working stand, and the other is the storage stand. While one tube is paying off the wire rod, the other can be pre-loaded with a new coil. When the coil on the working stand is depleted, the tail end of that coil and the head end of the coil on the storage stand are welded together and ground. Production can then continue without stopping, and the now-empty stand can be pre-loaded. This pre-loading design concept improves efficiency by eliminating downtime for loading.

                                

(2)  Straightening Cage and Motorized Vertical Descaling Machine

    The straightening cage is welded from ribbed steel bars. Its funnel-shaped structure transforms the steel bars from a coiled state into straight, spiraled bars, thereby ensuring that the reinforcement is essentially straight before  entering the descaling machine. This guarantees the high-speed and reliable operation of the equipment.

     The dust-proof descaling machine consists of five pulleys. Its primary function is to repeatedly bend hot-rolled coiled rods using these five descaling wheels, thereby removing the surface oxide scale. This improves the surface quality of the steel bars and plays a significant role in reducing wear on the rolling mill rolls. The base is welded from steel plate assemblies. To save space, it can be installed on the same base as the main machine.

(3) Pre-finishing Rolling Mill (see illustration below)

     The pre-finishing rolling mill flattens and reduces the diameter of the reinforcement, preparing it for thread rolling in the main rolling mill. This mill operates as a passive rolling mill.

 

(4) Main Rolling Mill
     The main rolling mill is the final step in forming ribbed steel bars. It withstands substantial forces and requires high machining precision. The mill offers the following advantages:

    1.Center Self-Alignment (Domestically Exclusive) – No adjustment is needed for the mill center, regardless of the size or wear condition of the rollers.

   2.Extended Roller Service Life – A single roller set can process over ten thousand tons of steel.

   3.Easy Roller Replacement (Domestically Exclusive) – Features a slide-drawer replacement system, allowing completion within 10 minutes.

   4.Automatic Cooling System (Domestically Exclusive) – Integrated exclusively into the main rolling mill.

    5.High Automation (Domestically Exclusive) – Fully automatic concentric alignment; no adjustment required when changing reinforcement entry/exit guides. This represents world-leading technology.

    6.Integrated High-Precision Guide (Domestically Exclusive) – A single guide unit adjusts vertically, horizontally, and laterally.

                                                               

    7.Proprietary CNC Automatic Grease Lubrication System (Domestically Exclusive) – Prevents bearing damage caused by delayed manual lubrication

 (5) Control Console

 Note: This device adopts an infrared non-contact temperature measurement method, utilizing optical fiber transmission. It features strong anti-interference capability and displays temperature digitally.

(6) Heating Cabinet (see illustration Below)

      The primary operating cost for this equipment set is electricity consumption. The performance of the reinforcement heating equipment is directly reflected in its power consumption index. The adoption of high-performance intermediate-frequency or super audio-frequency heating equipment can save 20 to 50 kWh per ton in electricity costs. It is required to utilize high-performance RBGT modules, which offer high electrical conversion efficiency. The heating equipment operates safely, reliably, and is environmentally friendly.

 

(7) Cutting

     The cutting process employs a flying shear independently developed by our factory. It features low cutting power consumption, rapid response, low failure rate, and is maintenance-free. Through years of improvements, the technology is highly mature and delivers industry-leading performance.

 

                                                     

(8) Cooling Bed
    The cooling bed is one of the essential pieces of equipment for ensuring the quality of reinforcement bars, especially when producing bars with diameters exceeding 10 mm. Due to their larger diameter, these bars dissipate heat relatively slowly. In traditional methods, after heating and cutting, the bars are dropped into a material trough, bundled, and left to cool on the side. This results in the outer and lower bars cooling first, while the bars at the core of the bundle cool extremely slowly. Consequently, the core bars undergo over-tempering, leading to inconsistent quality between the outer and inner bars in the same bundle, with a portion of the bars potentially failing to meet standards.

    Our company recommends: For the production of reinforcement bars above 10 mm in diameter, equipping the line with a cooling bed is highly recommended to ensure consistent and reliable bar quality.

                            

                                                                  

Model		LMS14-12
Diameter of raw material (before machining )	mm	φ12-14
Diameter of finished product (after machining )	mm	φ10-13
Roller speed	m/min	φ12=200/φ10=240
Predetermined length	m	12
Length of unloading   chute	m	12
Walking cooling bed length	m	12
Cooling bed width	m	1.5
Unloading and sliding mode		Unidirectional 360° rotation
Cutting accuracy	mm	±2.5
Secondary stacking receiving length	m	12
Material leveling method		Pneumatic automatic leveling
Speed adjustment		Variable frequency+Variable frequency
Control mode		Touch screen＋PLC
Main motor power	KW	160 ＋160
Heating power	KW	800+600
Total power	KW	1800
Total weight (approx.)	Kg	20000
Pay-off Stand		Dual set
Multi-point bundling machine	Station	three set
Rolling mill		Integrated main and pre-finishing rolling mill
Rolling times		2
Roll size		Main rolling mill φ228 + Active pre-finishing rolling mill φ210
Straightening method		In-line Straight Bar
Inline Temperature Measurement		Digital display
Inline Diameter Measurement		Digital display