Cold rolling mill is a new type of steel bar cold rolling equipment. The machine can process hot-rolled wire rods and circles with a diameter of 6.5 mm to 12 mm into cold-rolled ribbed bars with a finished specification diameter of 5 mm to 12 mm. The cold-rolled ribbed steel bar rolled by cold rolling mill is an updated product of cold drawn low-carbon steel wire in prestressed concrete members. In cast-in-situ concrete structure, it can replace grade I steel bar to save steel. It is a better kind of cold-worked steel of the same kind. If speed regulation is not required in the rolling process of the cold rolling mill, AC motor can be used; If speed regulation is required in the rolling process of the cold rolling mill, DC motor can be used.
Structure Composition:
The cold rolling mill is composed of working mechanism and transmission mechanism, in which:
① The working mechanism is composed of frame, roll, roll bearing, roll adjustment mechanism, guide device, rolling seat, etc.
② The transmission mechanism is composed of gear base, reducer, roll, connecting shaft, coupling, etc.
The gantry horizontal double active rolling mill set is composed of two active rolling mills. The installation mode and structure of the two rolling mills are the same. The main transmission part adopts the structural form of "motor → reducer → cardan shaft → rolling mill".
The two rolling mills are horizontal rolling mills, and the rolls are installed horizontally. The rolling mill adopts gantry archway, the roll ring is sleeved on the roll spindle, and the nuts are fixed. The two ends of the roll spindle are equipped with bearing pedestal and installed in the middle of the gantry. The bearing pedestal and the gantry archway frame are installed together to fix the rolls horizontally in the middle of the gantry.
The installation methods of the upper and lower rolls are the same. One pass reducing mill flattens the raw materials, extrudes the rib reinforcement with the crescent on both sides through the two-pass forming mill, twists the guide and adjusts the rolled piece to realize that after one pass rolling, the elliptical rolled piece is twisted by 90 ° and enters the two-pass forming mill to roll the finished reinforcement.
Working Principle:
The cold rolling mills use the motor to drag the reinforcement, and the load-bearing roll and working roll of the cold rolling mill jointly apply the force to the two surfaces of the reinforcement. By changing the gap between the two rolls, the purpose of rolling cold-rolled ribbed bars with different diameters is realized.
① Bearing roll: the bearing roll of the cold rolling mill is the roll closest to the base. When producing ribbed reinforcement, the roll plays the role of supporting the reinforcement, and evenly disperses the gravity of the reinforcement and the gravity of the work roll on the bearing roll, so as to produce ribs on the lower surface of the reinforcement.
② Work roll: the work roll of the cold rolling mill is above the load-bearing roll and is the farthest from the base. Therefore, when producing ribbed reinforcement, the roll mainly plays the role of rolling the reinforcement lifted by the load-bearing roll, so as to produce ribs on the upper surface of the reinforcement.
Maintenance:
① Check whether the electrical system of the cold rolling mill is normal before starting each shift;
② Check whether the oil level of each oil tank is normal;
③ Whether each oil filling part is filled with oil;
④ Whether the base metal feeding is reasonable;
⑤ After checking the above items;
⑥ The electrical part of the cold rolling mill should often clean up dust and sundries;
⑦ Frequently check whether the fastening of moving parts is loose and reasonable.
⑧ During the production process, the cold rolling mill shall not be used beyond the limit to avoid damage to some mechanical parts of the cold rolling mill. It shall be rolled according to the rolling standard, so as to ensure the safe use of cold rolling mill equipment and the qualification of products.
If you are interested in the cold rolling mills, please mail at marketing2@hanrm.com.
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