The transformation of the cold heading machine starts with the frequency conversion modulation system

Without changing the mechanical transmission system of the machine tool, it is transformed into stepless speed regulation, with a speed regulation range of 30-120 pieces\/min.Cold heading machineUnder the premise of the safety and reliability of the speed change system, the machine tool can change the speed smoothly and continuously. The digital display device is added to measure the number of machining parts. The device has the function of setting the total number of machining workpieces and automatically stopping when the set value is reached. When the machine needs to be stopped in the middle or when the machine is turned on again after the machine is shut down due to a fault, it is counted continuously when the machine is turned on again.

The key to the transformation of cold heading machines is the application of the variable frequency speed regulation system. According to the requirements of electrical technical transformation, a variable frequency speed regulation system and an intelligent instrument control system are selected. The speed control potentiometer is used to regulate the variable frequency motor steplessly within the range of 0-1500r\/min through the inverter; the intelligent instrument collects the number of machining parts through the NPN proximity switch, and then controls the equipment through the setting and operation of internal parameters.

The selected inverter has the characteristics of stable operation performance, strong expansion performance, and convenient maintenance. The inverter motor has a constant torque of 4.0kW; the input current is 11.1A, the output current is 12.8A, and the overcurrent (peak value) is 37A; the input signal: start, stop and direction, analog given value; the output signal: analog output (frequency), relay output 1 (fault), relay output 2 (run).

The dynamic display of the speed is selected for the DP3-SVA1A special digital display meter, which has functions such as decimal point setting, ratio, range and zero point adjustment, DC 12V auxiliary power supply output. Input power supply: current 0-20mA, voltage 0-10V; sampling speed is about 2.5 times\/s; response speed is about 4.5s; maximum display is 9999, freely setting the decimal point; power supply is AC 110\/220V, 50\/60Hz. The speed control switch uses 2W and 1kΩ wire-wound potentiometers.

The cold heading machine adopts an intelligent reversible preset count counter and a proximity switch to realize the display of the number of parts processing. The counter has the following characteristics: using a switching power supply, with a large voltage adaptation range and strong anti-interference ability; directly displaying the actual value, and setting the display of effective decimal places; keyboard settings, LCD with backlight display, simple operation; 5 counting input modes, 4 output modes, automatic reset time is adjustable by 0.01-9.99s; using the keyboard locking function, locking unwanted keys according to requirements to prevent misoperation.