Control method for sizing accuracy of high-speed reinforcement bar straightening machine

Abstract

The invention provides a control method for sizing accuracy of a high-speed reinforcement bar straightening machine. The reinforcement bar straightening machine comprises an encoder (1), a fixed cutter (2), a moving cutter (3), an initial position signal sensor (4), a synchronous pulley (5), a synchronous belt (6), a servo motor (7), a driven wheel (8), a reinforcement bar (9), a shear box (10), adrive shaft (11), a PLC (programmable logic controller) (12), a cam (13) and a signal plate (14). With adoption of encoder sizing and servo shear, electrical control instead of mechanical control isadopted in the whole process from signal receiving to shear execution by a control system, time is basically consistent for different times of shear from signal receiving to shear execution by the control system, errors are avoided, and sizing accuracy of the reinforcement bar is improved effectively.

Description

technical field [0001] The invention relates to a steel bar straightening machine, in particular to a control method for the sizing accuracy of a high-speed steel bar straightening machine. Background technique [0002] At present, the sizing methods used by steel bar straightening machines on the market mainly include: encoder sizing and baffle sizing. The shearing methods are mainly hydraulic, pneumatic, flying shears and other mechanical structures. Encoder sizing It has the advantages of convenient sizing and easy realization of continuous production, but its control accuracy is affected by the errors of the straightening machine's conveying mechanism and the shearing mechanism, resulting in low control accuracy, and the shearing action has a certain time error and is irregular If the encoder is used for sizing on a high-speed straightening machine with a processing speed of 130m / min and above, the 1MS error of the shearing mechanism will affect the sizing accuracy of 2M...

AI Technical Summary

Problems solved by technology

[0002] At present, the sizing methods used by steel bar straightening machines on the market mainly include: encoder sizing and baffle sizing. The shearing methods are mainly hydraulic, pneumatic, flying shears and other mechanical structures. Encoder sizing It has the advantages of convenient sizing and easy realization of continuous production, but its control accuracy is affected by the errors of the straightening machine's conveying mechanism and the shearing mechanism, resulting in low control accuracy, and the shearing action has a certain time error and is irregular If the encoder is used for sizing on a high-speed straightening machine with a processing speed of 130m / min and above, the 1MS error of the shearing mechanism will affect the sizing accuracy of 2MM, and this error itself cannot be overcome by encoder control

Although the baffle plate can adjust the position of the baffle plate according to the length of the steel bar that needs to be cut each time, so that the length of the cut steel bar is ideal, but the operation is cumbersome and it is difficult to realize non-stop production of various sizes

Although the fixed length of the baffle plate is still the main control method of the high-speed steel bar straightening machine, it cannot satisfy the society's endless pursuit of reducing labor intensity. The demand for a new type of fixed-length shearing control method is becoming stronger and stronger.

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