SDGT-320D High-Precision Double-Axle CNC Lathe is a special instrument independently developed by Atoman Science and Technology Ltd. especially for processing of taper holes and terminal surfaces of both ends of gravure cylinders simultaneously from both ends. The instrument is developed in accordance with requirement of concentricity of gravure cylinders in the gravure engraving and electric roller industries. It is unique and first in the world. Double-axle boring mill is of high concentricity, high efficiency, easy operation and reliability.
 
Features
● High processing accuracy. The dual principal spindle is a mechanical axis with facing head (servo boring head), which is patented technology, enabling synchronous drive. It is capable of high-precision processing of taper holes and terminal surfaces of both ends of gravure cylinders simultaneously from both ends, ensuring boring roundness of processing parts lower than 0.01mm, concentricity of processing parts lower than 0.02mm, concentricity of taper holes and excircles lower than 0.05mm.
● Wide range of gravure cylinders to clamp. Range of diameter of gravure cylinders clamped of standard models is 110-320mm, range of length of gravure cylinders clamped is 590-1600mm, minimum length of gravure cylinders without shield reaches 480mm, processing scope of knives is Ф70-110mm。
● Powerful and efficient. Processing of one gravure cylinder with of diameter of 110-320mm and length of 590-1600mm takes only 3-5 minutes, 10,000 gravure cylinders can be processed per month.
● Easy and convenient to operate. Clamping tool centers automatically in one clamp. No repeated clamping is required. The principal spindle positions automatically, the CNC interface is graphical and capable of single button operation, thus simple to operate, and reduce technical requirement for operating staff. Staff can master operation with simple training. Labor strength is also greatly alleviated.
● Aside from taper holes and terminal ends, it is capable of processing inner and outer chamfers of tapers. Staff won’t harm his hand due to absence of chamfers.
 
Configurations
● Natural granite pedestal.
● The dual principal spindle is a mechanical spindle with facing head (servo boring head), which is patented technology of the Company.
● Automatic centering device of gravure cylinder calmping (servo clamping mode adopted)
● Guiderail lubrication adopts lubrication oil injection.
● Digital control system adopts Mitsubishi E70 system.
● Equipped with automatic chip-curling device.
 
    
Technical Parameters
1、Rotating accuracy of principal spindle:                                     10μm
2、Rotating speed of principal spindle:                                          100-300rpm
3、Range of length of gravure cylinders clamped:                        590-1600mm
              Note: With shield removed 480-1600mm
4、Processing range of boring cutter in X axis direction:                 Φ65mm-Φ140mm
          Thus range of taper holes (larger end) :                                 Φ70mm-Φ110mm
5、Range of diameter of gravure cylinders clamped:                   Φ110mm-Φ320mm
6、Range of degree of taper holes of gravure cylinders processed:               16°- 32°
7、Roughness of processing parts :                                                    Ra＜3.2um
8、Taper tolerance :                                                                                 ＜10′
9、Concentricity of processing parts:                                                 ＜0.02mm
10、Boring roundness of process parts:                                          ＜0.01mm
11、Concentricity of taper hole and excircle:                                    ＜0.05mm
12、Maximum weight of processing parts:                                      ＜200kg
13、Others
       Atmosphere pressure≥0.6MPa, Air filter accuracy: 0.5um.
       Power: Triple 380V/10KW
       Size of the main parts of the machine: 5100mm*1500mm*1400mm；
      Total weight: 8t；
 
Operation Environment Requirements
1、Atmosphere pressure ≥ 0.6MPa. Air filter accuracy: 0.5um. 1. Instrument operation temperature:  10℃-30℃.
2、Power: Triple 380V/10KW.
 
Other Functional Parameters
1、Single button operation
2、Capable of blank processing and post-rough turning processing.
3、Capable of data transmission with MES, the platemaking managing system.
4、Manufacturing of electrical cabinets and bed connecting brackets to enable equipment transportation integration.

Applied in precision processing of terminal surfaces of steel gravure cylinders, with roughness of surfaces Ra < 3.2.
Applied in precision processing of taper holes of steel gravure cylinders, with taper tolerance lower than 10′。
Applied in mass production of various types of steel and iron electric rollers.