The CNC turning center CTX400E is a CNC machine tool that integrates the functions of trucking and milling produced by Germany (Dmaggi). Its powerful turning function, unique Y-axis and C-axis milling functions make the parts clamp and position times. Reduced, turning and milling parts are completed. In this paper, the author briefly describes the function and numerical control system of CTX400 CNC turning center, and gives a processing example.
First, the main structure of CTX400 machine tool
The CTX400 turning center is mainly composed of bed, integrated spindle (spindle H), chuck clamping/clamping device, Z-axis feed drive, turret tool holder, X-axis feed drive, tailstock and composite slide. composition.
1. Machine tool technical parameters
CTX400E turning center spindle speed range is 25 ~ 5000 r / min, chuck diameter is 200 mm, C axis speed is 100 r / min, indexing accuracy ≤ 0.04 °, X direction fast moving speed is 20 m / min, Z direction The fast moving speed is 24m/min. The machine is equipped with 12 tool positions and the tool holder is DIN69880 standard 30 specifications. It can be equipped with up to 6 power knives. The maximum diameter of the power knives is Φ13 and the maximum speed is 2500 r/min.
2. Main features of the machine tool
The CTX400E turning center adopts a four-axis three-link configuration, a linear axis X/Y/Z and a rotating C-axis, and the C-axis rotates around the main axis. In addition to the general turning function, the machine also has the function of milling on the end face (G17) and the outer face (G19) of the part.
3. Machine interface
The operation interface is divided into six menus, as shown in Figure 1. The MACHINE menu is used by the operator to set various parameters of the machine during machining; the DIN PLUS menu provides the window for the operator to manually program the program; the PARAMETER menu provides the operator with the definition and modification of the tool, chuck,
fixture and tip in the process. The window; the SIMULATION menu is the simulation window, through which the machining program can be verified; SERVICE provides shortcuts for service and repair; TURN PLUS is the automatic programming module.
Second, CTX400 CNC system introduction
CTX400 configuration HEIDENHAIN
CNC PILOT 3190 CNC system, running under Windows 95 environment, uses "human-machine dialogue, graphics support" to work.
Conversational programming
Programming only needs to select the input machining material, part blank, part finishing shape from the menu, select the tool in the magazine, set the rough and finishing parameters, etc., and the tool path can be automatically generated. Since it is no longer necessary to directly write the control commands of each axis, compared with the ordinary CNC, even those who have no programming experience and those who cannot determine the cutting conditions can complete the programming in a very short time, thus greatly shortening Processing preparation time increases processing efficiency.
Figure 1 CTX400E operation interface
2. Tool path simulation and inspection
The machine tool displays the parts in real time through the G17, G18 and G19 windows. Through the tool path check, the details of the machining process can be verified, and the abnormal alarms and prompts appearing during the machining can be simplified, and the confirmation of the program can be simplified, and the trial cutting time is greatly reduced. Figure 2 shows three different angles of the path simulation.
Figure 2 Schematic diagram of CTX400E simulation processing
3. Advanced tool life management
In the tool magazine, by recording and simulating the machining load and machining time of each tool, it is possible to quickly judge the wear of the tool, and promptly remind the processor to change the tool, which has a positive effect on the accuracy of the machined part.
4. Spindle load display
The spindle load and rotation speed of each tool in the program are recorded and displayed on the operation panel. The operator can carefully analyze the cutting parameters according to the spindle load condition to achieve the effect of optimizing the cutting parameters.
Third, processing examples
The parts shown in Figure 3 are machined on the turning center. First, the machining features of the car and milling are described in the program language section as follows:
FERTIGTEIL [ FINISHED PART ]
N21 G0 X0 Z0
N22 G1 X66.813
N23 G1 X66.15 Z-19
N24 G1 X0
N25 G0 Z0
N27 STIRT_Y X80 Z0 C0
N28 G308 P-5
N29 G170 X3 Y0
N30 G171 Y-22.804
N31 G173 X3 Y22.804 R23
N32 G171 X3 Y0
N33 G309
STIRT_Y X80 Z0 C180
N36 G308 P-5
N37 G170 X3 Y0
N38 G171 Y-22.804
N39 G172 X3 Y22.804 R23
N40 G171 X3 Y0
N41 G309
Figure 3 Schematic diagram of the machined parts
For the described parts, the machining is carried out first, then the power cutter (diameter 10) is used to machine the two grooves on the end face of the part. The G code automatically generated by the system is as follows:
BEARBEITUNG [ MACHINING ]
N44 G59 Z239.681
N45 G26 S2000
N46 G126 S1500
N48 G14 Q1
N49 T4
N50 G96 S300 G95 F0.25 M4 M108
N51 G0 Z2
N52 G0 X80
N53 G82 X-0.8 Z0.1 K0.5
N54 G0 Z0.1
N55 G82 X-0.8 Z0 K0.1 G95 F0.15
N56 G0 X80
N57 G0 Z100
N58 M5 M109
N59 G14 Q1
N61 G14 Q1
N62 T4
N63 G26 S1500
N64 G96 S500 G95 F0.25 M4
N65 G0 Z2
N66 G0 X80 M108
N67 G810 NS21 NE23 P1 I0.2 K0.1
N68 G890 NS21 NE23 G95 F0.2
N69 G0 X100
N70 G0 Z100
N71 M5 M109
N72 G14 Q1
N74 G14 Q1
N75 T3
N76 G197 S1000G195 F0.15M103
N77 G17
N78 M12
N79 G00X0 Y0
N80 G00Z5
N81 G840 Q1 NS28 NE33 H0 R5.5 P-1 K10
N82 G840 Q1 NS36 NE41 H0 R5.5 P-1 K10
N83 G0 X100
N84 M13
N85 M105 M109
N86 G14 Q1
ENDE
Fourth, the conclusion
CTX400 turning center has a good turning and milling compound processing function, its advanced technology, easy to use, is a very good CNC machining equipment.
