Cold Rolling Mill

1. Introduction

Cold rolling mill is a new type of steel bar cold rolling processing equipment. The machine can process hot-rolled wire rods and coils with diameters between 6.5 mm and 12 mm into finished cold-rolled ribbed bars with diameters between 5 mm and 12 mm. The cold rolled ribbed steel bars rolled by the cold rolling mill are the replacement products of cold drawn low-carbon steel wires in prestressed concrete members. In cast-in-situ concrete structures, Grade I steel bars can be replaced to save steel, which is a better kind of cold worked steel of the same kind. If speed regulation is not required in the rolling process of cold rolling mill, AC motor can be used; If speed regulation is required during rolling of cold rolling mill, DC motor can be used.

2. Advantages

Cold rolling mill is a kind of machine and equipment that can cold draw and cold roll Grade I hot rolled Q235 round steel to produce spiral shaped steel bars. The cold rolling mill equipment can conduct cold processing on the longitude and latitude directions of the base metal at the same time during the process of rolling the cold rolled ribbed steel bars. On the premise of maintaining the relative balance and stability of the product in the central area of the original section, the cold rolling mill equipment can still retain sufficient extensibility while improving the resistance to displacement and compression, Thus, the geometric parameters (flattening thickness, section width thickness ratio, area shrinkage and pitch) and four material indexes (tensile strength, conditional yield value, elongation and cold bending) of can be used in important industrial and civil buildings with Class I safety level, saving steel consumption and reducing building price

3. Component

The cold rolling mill is composed of working mechanism and transmission mechanism, including:

① The working mechanism is composed of stand, roll, roll bearing, roll adjusting mechanism, guide device, roll seat, etc.

② The transmission mechanism is composed of gear base, reducer, roller, connecting shaft, coupling, etc.

4. Working principle

The cold rolling mill uses the motor to drag the steel bars, and the load bearing roll and the working roll of the cold rolling mill are used to apply the force on both sides of the steel bars. By changing the gap between two rolls, cold rolled ribbed bars with different diameters can be rolled.

① Bearing roll: the bearing roll of the cold rolling mill is the roll closest to the base. When producing ribbed steel bars, this roll plays a role of supporting the steel bars, and evenly distributes the gravity of the steel bars and the working gravity of the working roll on the bearing roll, so as to produce rib lines on the lower surface of the steel bars.

② Work roll: the work roll of the cold rolling mill is on the top of the bearing roll, which is the farthest away from the base. Therefore, when producing ribbed steel bars, the roll mainly plays the role of rolling the steel bars supported by the bearing roll, so as to produce rib lines on the upper surface of the steel bars.

5. 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 oil is injected into each oil injection part;

④ Whether the feeding of base metal is reasonable;

⑤ After checking the above items;

⑥ The electrical parts of the cold rolling mill shall be regularly cleaned of dust and debris;

⑦ The moving parts shall be regularly checked for looseness and rationality.

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. The cold rolling mill shall be rolled according to the rolling standard to ensure the safe use of the cold rolling mill equipment and the conformity of the products.

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