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Fixed Table Double Columns Machining Center DMK-A Series

double column machining center

Fixed Table Double Columns Machining Center DMK-A Series

DMK series is a processing center(double column machining center) for molds and long-axis aviation products, which can achieve an effective processing distance of 21 meters. Its unique rigidity enables it to meet the requirements of high-precision machining of moulds and high-speed and high-efficiency heavy-duty machining. The closed-loop system of the whole CNC machine tool has extremely high dynamic response, can obtain higher processing efficiency and processing accuracy and longer precision life, and provide superior seismic performance, providing a perfect solution for high-precision and high-efficiency processing of molds and aviation boxes.

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Product Detail

Features

01
The machine tool structure adopts the symmetrical overhead bridge gantry frame type, the driving center of gravity is close to the center of the moving parts, the overturning moment is small, and the quality of the moving parts is stable and stable, and is not affected by the weight of the workpiece, which is convenient for high-speed and high-precision control.
02
Each linear axis of the machine tool is controlled by double drive rings, and the X and Y axes are controlled by electric clearance elimination of screw drive motor, which can realize precise motion control.
03
The application of the optional direct-drive motor further improves the fast operation of the x-axis and y-axis and the efficient and precise stability accuracy. The matched precision grating is used to match the CNC system to achieve the closed-loop function. The overall system performance improves the geometric accuracy.

04
Z axis adopts lead screw synchronous drive control technology, and gantry Z axis with balance cylinder structure has higher dynamic performance and motion accuracy.
05
The screw nut of Z-axis is cooled separately to reduce the influence of thermal deformation on the precision of Z-axis.

A. Spindle

According to the requirements of customers' products, the main shaft can choose gear structure with high rigidity and high rigidity, and electric main shaft with high speed and high precision, which has good comprehensive performance, convenient maintenance, high efficiency and low vibration.
The mechanical spindle with high rigidity is adopted, and the two-speed gearbox can obtain greater cutting torque to meet the requirements of low-speed and high-torque heavy cutting.
The selected power distribution spindle is used to operate smoothly and process parts with high smoothness, and the matching degree between the tool and the system is more stable and reliable.

B. High-speed nut rotation drive technology and direct drive technology

The machine tool can be equipped with 3 sets of ball screw structure, and adopts the company's innovative and optimized screw rotating nut drive structure, which has the characteristics of small inertia, less heat, high drive efficiency and high dynamic response performance.
The machine tool can be equipped with xy with direct drive technology.

C. The machine tool can be equipped with grating synchronization control

The three axes of the machine tool adopt the synchronous drive technology of motor and screw rod. The shaft dynamic response performance is further improved. At the same time, grating synchronous control technology is adopted to achieve high-precision and low-cost control.

D. The machine tool is equipped with direct-drive motor synchronous control technology

When X axis adopts double drive and Y axis adopts single drive, grating ruler must be used for full closed-loop control to greatly improve the measurement sampling speed, measurement accuracy and control vibration interference.

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Parameter

Technical specifications	Unit	DMK2121	DMK3521	DMK5221	DMK3535	DMK5235	DMK6235	DMK2521ZK	DMK3521ZK
Technical specifications	Unit	DMK2121	DMK3521	DMK5221	DMK3535	DMK5235	DMK6235	DMK2521ZK	DMK3521ZK
Workbench (length * width)	mm	2500*1700	4000*1700	5700*1700	4000*2900	5700*2900	6700*2900	2500*1700	4000*1700
Maximum load of workbench	T/㎡	3	3	3	3	3	3	3	3
T-slot (slot number * slot width * spacing)	mm	9-28*200	16-28*200	25-28*200	16-28*200	25-28*200	31-28*200	9-28*200	16-28*200
Door width	mm	1980	1980	1980	3180	3180	3180	1980	1980
X -axis/Y -axis/Z axis (1250 itinerary when square pillow)	mm	21002100900	35002100900	52002100900	35003500900	52003500900	62003500900	25002100900	35002100900
Distance from spindle end face to work table	mm	200-1100	200-1100	200-1100	200-1100	200-1100	200-1100	200-1100	200-1100
CNC system		SIEMENS　　Mitsubishi　　FANUC
X/Y/Z axis fast displacement	mm/min	1-10000	1-10000	1-10000	1-10000	1-10000	1-10000	1-10000	1-10000
Maximum cutting feed speed	mm/min	1-8000	1-8000	1-8000	1-8000	1-8000	1-8000	1-8000	1-8000
Automatic tool change system (optional or chain)		cam-type	cam-type	cam-type	cam-type	cam-type	cam-type	cam-type	cam-type
Number of standard tools (optional)	pcs./kg	24..30/18	24..30/18	24..30/18	24..30 40/18	24..30 40/18	24..30 40/18	24..30/18	24..30/18
Maximum tool diameter/length	mm	210/400	210/400	210/400	210/400	210/400	210/400	210/400	210/400
Positioning accuracy		0.015	0.015	0.015	0.018	0.018	0.018	0.006	0.006
Repetitive positioning accuracy		0.006	0.006	0.006	0.006	0.006	0.006	0.0035	0.0035
Three -axis guide rail	mm	45/55/65	45/55/65	45/55/65	45/55/65	45/55/65	45/55/65	45/55/65	45/55/65
Three -axis screw (when the square sliding pillow is 63)	mm	6363/50	63/63/50	80/63/50	63/63/50	80/63/50	80/63/50	Direct drive motor	Direct drive motor
Z-axis guide rail (optional square ram)		65(420*420)	65(420*420)	65(420*420)	65(420*420)	65(420*420)	65(420*420)	65	65
Spindle specification (model/installation diameter), rotating shampoo, maximum speed		Gear / electric spindle	Gear / electric spindle	Gear / electric spindle	Gear / electric spindle	Gear / electric spindle	Gear / electric spindle	Electric spindle	Electric spindle
Spindle motor power (Optional 22/26kW)		15/18.5	15/18.5	15/18.5	15/18.5	15/18.5	15/18.5
Three-axis motor power (optional 7/7/7)	kw	3/3/3	3/3/3	3/3/3	3/3/3	3/3/3	3/3/3	3/3/3	3/3/3
Air demand	kg/cm²	6.5	6.5	6.5	6.5	6.5	6.5	6.5	6.5
Power demand	KVA	40	40	40	40	40	40	55	55
Machine weight	Τ	25	29	35	36	43	48	25	29
Overall dimensions of the machine (length * width * height) (excluding tool magazine)	Cm	550450418	680450418	810450418	680580418	810580418	910580418	550450418	680450418

Accessories

double column machining center Structure Diagram

1. Spindle motor with gearshift reducer
2. Spindle ram
3. Spindle ram pressing plate
4. Extended range ram pressing plate
5. Extended ram
6. Middle bracket
7. Incremental feed lead screw pair
8. Spindle feed lead screw pair
9. Balance cylinder rod
10. Extended ram clamping cylinder
11. Beam

Optional
The distance from the spindle to the work table	Optional 450 to 1350 (Z -axis height 4950); 700 to 1600 (Z -axis height 5200); 970/1870 (Z -axis height 5500)
When the square slip pillow 420*420, the distance from the spindle end surface to the work table distance	Optional 330 to 1580 (Z -axis height 6200); optional 600 to 1850 (Z -axis height 6500)
When sliding the pillow gear box is a line rail	Rachish speed 20 to 4500 rpm, rated torque 570, maximum torque 850
When sliding the pillow gear box is a square slip pillow	Rachish speed 20 to 3500 rpm, rated torque 1100, maximum torque 2300
When sliding the pillow gear box is a square slip pillow	Turn speed of 20 to 6000 rpm, rated torque 570, maximum torque 850

Application

Double column machining center is applicable to parts with appropriate batch size that are complex, have many processes, require high precision, need to use various types of ordinary machine tools and various tools and tooling, and can be processed only after many times of clamping and adjustment.It mainly processes complex curved parts, special-shaped parts, discs, sleeves, plates and other parts such as box and impeller blades. It is widely used in precision molds, precision parts, hardware, auto parts, aerospace, shipbuilding, national defense and other fields.

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