Centrifugal Casting Machine for Turbine

Product DescriptionThe multi-position rotary type centrifugal cylinder liner casting machine consists of multiple main machines plus auxiliary machines. The main machines, uniformly arranged on the circular rotary workbench, will be rotated via the workbench to reach different work positions of auxiliary machines. Four sets of auxiliary machines, set around the circumference of the rotary workbench, will perform cleaning, spray coating, pouring and workpiece picking-up for the main machine that rotates to respective work position. The casting process consistency for different kinds of cylinder liners is guaranteed by the high speed stable main machine with velocity regulation, advanced multi-section and multi-speed spray-coating technology as well as real-time monitoring and adjustment of key technological parameters within the whole casting process. Therefore, human factors that may affect casting parameters are all eliminated and the inherent quality of cast cylinder liners is fundamentally guaranteed.
This machine enjoys small floor area and high production efficiency and only requires two operators. Thus it is highly applicable for continuous batch production of rough-casted cylinder liners of the same type.The 8-station rotating-plate-type centrifugal casting machine is composed of rotating platform, cantilever-type centrifugal casting main engine, automaticcleaning device, automatic painting device, automatic pouring device, cast tube crosswise device and mould cooling system.Cantilever-type centrifugal casting machineThe cantilever-type centrifugal casting machine is the core of the complete machine. 8 cantilever-type centrifugal casting machines are distributed uniformly in the rotating working platforms. The variable frequency motor drives the main shaft through belt transmission structure to realize the rotation of the mould and the centrifugal pouring of the casting. The mould is installed in the subpanel and the main shaft rotating speed could realize stepless speed regulating, which would meet the process requirements of casting of different diameters.
In order to make the mould stop quickly, the cantilever-type centrifugal casting machine is equipped with a brakingdevice, which would reduce the working pace of the machine andimprove working efficiency.
Each centrifugal casting machine is equipped with safety protection cover to realize the safetyproduction of the casting.
2.Rotary Table
Rotary table is the keypart of the eight-station rotary table type centrifugal casting machine which can achieve the multiple-station working requirements of centrifugal casting machine. The rotation of the table is achieved throughthe gear driving mechanism to drive the rotary support relying on the servo motor, and the entire rotary motion is precisely positioned by the servo control. The rotary table rotates intermittently and pauses at every rotation of 45 degrees, and each station completes its corresponding motion, and it will re-rotate to the next station after all stations complete the work. The rotary table rotates in a circle in which it completesthe centrifugal casting process of one cast. The rotaryspeed can be set according to the process requirement of each station, and be precisely controlled.
3. Automatic spraying device
The automatic spraying devicecan realize the accurate movement of the spraying car through the servo electriccylinder unit. Sprayingwork for the cavity of the whole mold can be achieved relying on the automatic travelling ofthe spraying rod and the mold rotates to meet the requirement of the production process. The travelling speed of spraying car is adjustable in the range of 0 ~ 1,000mm/s.
4. Automatic pouring device
The automatic pouring device mainly consists of pouring ladle, automatic weighing unit (with the accuracy of 100g, reaction time less than 0.2s), pouring ladle tilting device, pouring basin, traveling car and etc. The weight of metal liquid which will be filled into the pouring ladle is detected by the automaticweighing unit and will be displayed on the large screen. The filling of liquid will stop when the metal liquid in the pouring ladle reaches the set weight. When pouringcar travels to the position for pouring, the variable frequency motor will drive the pouring ladle to tilt to pour the metal liquid into the pouring mold through the pouring basin. Pouringcar travels backward to the position of molten iron for the next centrifugal casting after the previous pouring is completed. The tilting rate of the pouring ladle can be adjustableaccording to the requirement of the procedure.
5. End cover and casting unloading device
The two motionsof unloading endcover and casting are completed on the unloading station. The working process is as follows: after the rotary table rotates to the ready place, and the mold stops rotating and brake locking, the end cover is unloaded by manual, and the unloading car will travel forward and the unloading claw reaches the unloading station, and the clamp distracts with the driving of tension cylinder and catches the inner wall of the cast, then, the unloading car will back off to pull out the cast and end cover onto the support of the cast, and loosen the clamp, and the unloading car backs off and leaves the cast on the tray, and the turnover mechanism will turnover onto the conveying unit of the cast (self-prepared).
6. Electrical control system
6.1 Electric control system is mainly composed of frequency conversion, servo driver, PLC, touch screen, control cabinet, LV electric component, buttons, indicator lights etc.The controlboxes and operating panels are set on the ground and the power and signal cables are introduced via trolley line to the centrifugal casting machine mounted on rotary workbench.
6.2 The technological parameters for no less than 20 kinds of castings are stored in touch screen and can be extracted conveniently.
6.3 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.
6.4 Each main machine can be shifted to off-line/on-line status during operation.
6.5 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.
Main technical parametersSerial numberNameofparameterParameter valuesUnit1Turntable diameter2500mm2Number of station83Rotation power of motor4Kw4Mold rotation diameterΦ420mm5Casting maximum diameterΦ120mm6Casting maximum length300-600mm7Speed of mold0~1600rpm8Main machine power of motor5.5Kw9Centre-to-centre spacing between the ground and mold1000mm10Total power of the machine55Kw