Two-station Fully Automatic Centrifugal Casting Machine
Technical SchemeBrief Introduction
Double work position centrifugal cylinder casting machine is composed of two main engines, a set of mobile auxiliary machine working platform, a set of automatic pouring device, casting tubes conveying device, and electric control system, etc. The two main engines work coordinately with auxiliary machines, while the pouring system performing automatic pouring work to the two main engines on a time division basis.
The main engines is in horizontal supporting wheel structure, and its speed is frequency conversion regulating. The auxiliary machines are compactly arranged on one mobile platform. The mobile platform moving and spraying vehicle both adopt servo driving method. The whole machine has the characteristics of compact structure, smooth movement, and high degree of automation.
The control system adopts PLC control system to control the actions of main machines and auxiliary machines, and the speed regulating process of the supporting wheels of the main machines. The variable speed regulating system is composed of AC frequency conversion motor and AC frequency conversion speed regulator. By adopting imported AC frequency converter, the system has a characteristic of low speed and high torque, and being smooth in speed control and wide in the speed range. The touch screen can monitor the working condition of the centrifugal casting machine and display the pouring process parameters, as well as the fault alarm information of the machine. The control system has two working methods, manual and automatic methods.
Technical parameters
| Item |
Values |
Unit |
| Casting diameter |
Φ60~Φ120 |
mm |
| Casting maximum length |
1500 |
mm |
| Mold raceway diameter |
Φ100~Φ180 |
mm |
| Riding wheel diameter |
Φ300X70 |
mm |
| Two riding wheel outer span |
900 |
mm |
| The distance between ground and mold center |
800 |
mm |
| The host spacing |
800 |
mm |
| Speed of mold |
0~2000 |
rpm |
| Centrifugal machine power motor |
7.5 |
Kw |
| Pulling car power |
2.2 |
Kw |
| Cleaning car power |
0.37 |
Kw |
| Praying car power |
0.4 |
Kw |
| Mobile platform power |
1.0 |
Kw |
| Pouring car power |
1.0 |
Kw |
| Pouring ladle power |
0.4 |
Kw |
| Pouring ladle turning power |
0.75 |
Kw |
| Pulling stroke |
≥2200 |
mm |
3. Automatic casting device
Automatic casting device, mounted at casting end of centrifugal casting machine, is composed of casting bag, automatic weighing device, tilting device, casting groove and mobile vehicle.
3.1 Transverse movements of casting vehicle are driven by AC servo motor, speed adjustable within the scope of 0-600mm/s. Stable and reliable position control system, precisely locating.
3.2 Crash bars, installed on both sides of the vehicle, can shut down casting vehicle immediately and alarm by touching them. Press alarm reset button to make the vehicle back to work.
3.3 Longitudinal movements of casting vehicle are driven by AC servo motor, speed adjustable within the scope of 0-300mm/s. Stable and reliable position control system, position adjustable separately.
3.4 Tilting of casting bag is driven by an AC frequency conversion motor. Tilting speed adjustable. Tilting position could be kept (duration adjustable) when it's in place and will return after liquid iron pour-out.
3.5 Casting vehicle is equipped with automatic weighing device (accuracy:100g, response time<0.2sec.). Weight of molten iron is displayed on screen.
3.6 Casting process: Weight of liquid iron in the casting bag is detected by automatic weighing device and displayed on screen. Filling stops after reaching setting weight. Casting vehicle moves transversely to axis of main engine; casting device move forward to cast position; casting bag tilts and pours liquid iron into pipe mould through casting groove; after casting complete, vehicle move backward and then transversely to position waiting for next centrifugal casting.
4. Mould cooling and temperature measurement devices for main engine
4.1 Every engine is fitted with separate cooling channel which could cool down mould, solenoid valve and manual flow control valve evenly.
4.2 Every main engine is equipped with three infrared thermometers measuring temperatures of head, middle and tail sections respectively. Protective devices are installed on the thermometer.
5. Electric control system
Electric control system is mainly composed of frequency conversion, servo driver, PLC, touch screen, control cabinet, LV electric component, buttons, indicator lights etc.
5.1 The PLC is adopted as lower controlling computer and the 10.4 inch color touch screen is used as the upper monitoring computer in the control system, thus to achieve stepless revolution control of main machine, automatic cooling control, movement positioning and automatic speed control of auxiliary machine, working status and technological parameter (i.e. revolution, cooling time, etc.) monitoring of main machine, as well as position and speed parameter setup and modification of the auxiliary machine. The parameters like speed and position during the whole operation of the machine can be automatically programmed from the touch screen, thus to satisfy automatic production.
5.2 The technological parameters for no less than 20 kinds of castings are stored in touch screen and can be extracted conveniently.
5.3 The control system provides manual and automatic control modes that can be shifted to each other as per requirements. The manual mode is used for machine adjustment, while the automatic mode is for normal operation.
5.4 Each main machine can be shifted to off-line/on-line status during operation.
5.5 The control system is furnished with perfect safety measures like interlock, over-heat and over-load protection, in order to ensure its safety and uninterrupted production.
5.6 Electrical control boxes are equipped with air conditioners.
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