2.2DH365 is used to process the inner plane of the differential case. With the development of technology, the electronic technology is constantly updated. The combined machine tool is developed from the initial relay control, sequencer control, and program board control to the programmable controller (referred to as PC). )control. The PC has been widely used in combination special machines and honing machines. Due to the limited degree of PC control in the machine, the CNC system uses its high-precision coordinate positioning and strong flexibility. High reliability has begun to enter the field of combined machine tools.

The DH364 and DH365 horizontal CNC combined machine tools are used to process the spherical surface and the inner plane of the car's differential case.

2 CNC combined machine tool processing of parts 2.1DH364 is used to process S5410H9 after machining the spherical surface of the differential case. The position requirement is based on the axis of the two cross holes, the surface roughness is up to Ra3.2mm. The two planes before processing are Gross surface, machining allowance unilateral 2. 5mm, the size after processing reaches A. B basic axis 37. 5 ± 0.05mm, position requirements to the full reference of the CD reference axis 0.04mm, surface roughness Ra3 .2mm. The above two parts are QT-250, and the processed parts are as shown.

Lx parts are sent into the fixture~ with clamping protection robot feeding knife (roughing axis oriented I hand tool orientation rod loosening (tool release ~~|1 language rotation, cooling ~ large slide left processing, right plus: c|Parts Process Flow Chart The process flow chart for part processing is shown.

3 Parts processing requirements for CNC combined machine tools According to the machine tool appearance designed according to the machined parts, the main function is: In order to accurately insert the small slide control spindle into the tool spline, the spindle needs accurate orientation function.

The large sliding table is left, the right-hand processing and the spindle are inserted into the spline position. The position of the robot feeding knife is very precise, and the electric system is required to have extremely precise position control on the sliding table.

According to the analysis of the parts cut out by the test tool, the feed rate and the spindle speed need to be changed at any time. It is very complicated and difficult to adjust the feed rate and the spindle speed by mechanical means.

Numerous functions (such as opening and closing of the protective door, robot feeding and returning to the original position, robot rotation, positioning and returning of the positioning slide, spindle orientation, clamping and loosening of the cutter, opening and closing of the cooling, etc. If you can't show it on the operator panel, you need a function code to show them.

The machine tool diagram can be seen from the above, using the programmable controller (PC) to control the machine tool, to achieve the above functions is quite complicated, so we chose FANUCOMD system to control these two combined machine tools, thus solving the above problems.

The 4FANUCOMD system controls the 32-bit microprocessor of the combined machine tool, and the reliability can be greatly improved.

The control part adopts a panel-type mounting structure that realizes mechatronics.

The servo system's control circuit uses high-resolution position detection and microprocessor software control to achieve high-speed, high-precision servo position control.

The servo motor is a small and high-performance AC servo motor series, and the detection component uses a serial high-performance pulse encoder.

For the positional deviation of the machine, the clearance compensation and the pitch compensation can be corrected.

It can be seen from the function of FANUCOMD that it is very necessary to use the numerical control system control for the machine tool, and it is very reasonable.

5 The function of the numerical control system is analyzed in the application of the application on the combined machine tool.

The spindle orientation function is used to accurately insert the spline shaft on the spindle into the tool spline. The splined shaft on the machine tool spindle and the spline shaft on the machine tool spindle and the spline hole keyhole on the tool are quite precise. It is required to enter the tool or the spindle to exit the tool. The orientation position is very precise. The method is difficult to implement, and the orientation of the position can be achieved by using the spindle orientation function of the FANUCOMD system (see ).

In the orientation 6531 where the display value is 4096, the position of the spindle orientation in the position encoder mode is set. The setting range is 04096 pulses/r, which can be arbitrarily set within 36074096. When the orientation position stops at (1) Position, the value is displayed when the orientation is stopped 4096. The setting in No. 6531 is 0. When the orientation position stops at the position shown in (2), the value is displayed when the orientation is stopped 5012. The position of (2) is DH364, DH365 II. The orientation position required by the combination machine is so that the position set in the system parameter No. 6531 used in this machine is 5012-4096 = 1024. This gives a very accurate spindle orientation position. If the orientation position is found to be unsuitable during commissioning, change the value in No. 6531 to reach a satisfactory position.

The servo control is used to achieve high precision of the coordinate position. The processing of DH364 and DH365 has extremely strict requirements on the positioning accuracy of the machine tool. Since the servo system adopts high-resolution position detection and software control function of the microprocessor, high-precision position control is realized, and the linear positioning accuracy of the machine tool is +0.008mm, repeat positioning accuracy is 0.012mm / control system establishes the point mode of the machine tool, so that the system can accurately control the movement of the machine position during the movement of the machine tool, and accurately display the current position of the machine tool on the CRT.

The position of the robot to send the tool into the work is very strict. A slight deviation may cause damage to the tool and the robot. For this reason, the second point of the large slide (Z-axis) is set in the system, and the parameters of the second position are Set in No.737, the set value refers to the distance from the machine point. Moreover, in the design of the ladder program, it is stipulated that the large slide table (Z axis) must move to the second point (No. spline hole as shown in the figure. The data set in the 737), the robot can send the knife and retract the knife if It can be seen that the spline shaft on the main shaft and the large slide on the tool are in other positions, the robot will be prohibited from moving, and the signal connection is increased under AUTO (automatic mode) and MDI (manual data input mode). The BCD code will output the 2 digits of M (M is output through the transistor. After the code is output, after the time set by the parameter, the MF signal output transistor turns ON, the M code signal is read and the corresponding operation is performed, and the specified operation is completed. After the M code function, the completion signal FIN (FIN is shorted to 24V), when the FIN is turned on (closed) and the time set by the parameter (TFIN), the MF signal output transistor turns OFF (first, first The two-digit number becomes zero), and an M function is thus executed.

A lot of M function signals: Yes.

M19, M18: The sin of the spindle machine orientation and the spindle orientation is canceled during the movement of the machine tool to avoid damage to the robot and the tool.

The left and right machining in the machining process must have accurate displacement. The minimum movement unit that can be controlled by the numerical control system is 0.001 mm. The displacement specified by the program during the machining process is difficult to achieve with other electrical system controlled machines. Only the CNC system shows great advantages with its accurate position control.

The accuracy of other control systems can only be determined by the machine, and the mechanical precision of the machine tool of the numerical control system can compensate the pitch and the gap within a certain range, so that the machine tool can reach the optimal value of the precision requirement.

Flexible MS features. The use of the MS function makes the CNC combination machine more convenient to use than other combination machines.

5.1M function can.

M08, M09: Cooling on and off function.

M27, M28: Protective door closed, open function.

M38, M39: Clamp clamping, release function.

M40, M41: Robot out, back function.

M44, M45: Roughing tool release, clamping function.

M46, M47: Finishing tool release, clamping function.

M90, M91: Positioning the slide table to return to the original function.

The M function code used above provides a lot of convenience for machine adjustment. The adjustment of various actions in the machine tool controlled by other control systems can only be adjusted on the buttons and knobs set on the operation panel, and the function is temporarily added during the debugging process. It will be very difficult. When using the FANUCOMD CNC system, the main operation panel can be used for adjustment, or the M function code can be output in the AUTO and MDI modes using the system operation panel. If there is no start setting of this signal on the operation panel, only the function of the M code is specified in the ladder diagram, and the M code can be output in the AUTO and MDI modes to complete the specified operation of the machine. In the two CNC combined special planes, the clamping and loosening of the coarse and fine knives are not set on the main operation panel, but the clamping and loosening of the coarse and fine knives are specified in M44, M45, M46 and M47. Function, adjustment time, the M code is input in MDI mode to complete the clamping and loosening of the rough knives.

Take M38 (clamp clamping) M39 (clamp release) as an example to illustrate how M38 and M39 are processed in the ladder diagram.

a. Decode M38, M39 as shown.

b. Use M38, M39 in AUTO mode, see (clamp clamping execution M38, M39 use clamp clamping, solenoid valve power (PAJ power), clamp clamping execution, (down to page 60) control unit Wrong, it can cause difficulty in starting the motor and unstable operation. Just check it carefully and find out the wrong connection and correct it.

Short-circuit and misconnection of the main winding of the hidden pole motor. The main winding and the secondary winding of the stator of the motor are embedded in the slot, and the two-phase axis differs in space by 30°60° electrical angle (usually taking 45° electrical angle), which is a multi-spray winding with high-strength enamelled round copper wire. In the case of embedded windings, the short circuit fault is generally a short circuit between turns.

Abnormal phenomena and causes are the same as the salient pole stator.

The troubleshooting is subject to the specific conditions of the short circuit. The commonly used method is to first detect the resistance of several coils with a multimeter or a bridge, and the coil with a small resistance may have a short circuit.

When it is determined that a coil has a short circuit, take it out of the groove, peel off the outer insulation tape, and inspect it carefully. The method is the same as the processing of the salient pole stator.

The main winding is open. If the main winding is open, the motor cannot start. A multimeter or bridge can be used to check whether the line resistance is normal, and further find the coil and break point of the circuit breaker, re-weld the break point, pack the insulation paper or insulation tape at the welding place, brush the insulating paint and dry it. Partial repair.

3 When the motor can start, it can start without starting the motor, sometimes it can't start. The cause of the fault is: the center line of the rotor core is not in the straight line, or the rotor is seriously injured and the shaft is bent, causing the stator and rotor to rub. Broom.

When the stator is dipped, due to the large concentration of the insulating paint, the surface of the part of the pole core is too thick or has a small lacquer, but it is not found or removed in the assembly, so that the air gap is reduced, causing the stator and rotor to rub.

If the center line of the rotor is not in a straight line, the position of the stator and rotor should be adjusted. If the shaft is bent, straightening should be performed.

If the surface of the pole core is too thick or has a small lacquer, use a sharp knife or trowel to remove excess paint. At this time, be careful not to scratch the surface of the core and the surface of the paint film.

1975-), female, assistant engineer, engaged in the development and design of micro-motors.

(Continued from page 56) Then send an M39 command, the clamp clamp solenoid valve loses power (PAJ loses power), and the clamp is released.

c. M38, M39 complete the signal output, as shown.

0) Power is supplied, the clamp is clamped. After the PAPL (X21.0) is operated for 0.5 s, the M38F top signal is completed and the clamp clamping is completed. Similarly, the PAJ loses power and the clamp is released. After the PAPLS is de-energized, the 0s 538FIN signal is completed, the clamp is released, and the M function is completed.

It is not difficult to see that the use of the M function code provides greater convenience for the electrical control of the combined machine tool.

The 5.2S function S function signal processing is the same as the M function processing method. Unlike the M function, the S code is kept until the new S code is commanded.

The S function code used by the CNC combination plane can only rotate the rotation speed of the spindle to the axis. The electric control system can only issue one rotation signal. The speed of rotation can only be determined by the machine. In the numerical control system, the A series spindle motor and the spindle servo unit are used to control the spindle. The spindle speed can be arbitrarily given by the S command, which greatly simplifies the mechanical structure and thus reduces the mechanical workload.

Through the adjustment of internal parameters, the spindle speed (S) can be used very conveniently during the machining process. During the DH364 cutting process, the S350r/min is just used for machining. The whole machine produces vibration and the machined parts are corrugated. The roughness is not up to the requirement, and the parts are processed with 100r/min. The machine tool has no vibration and the finish of the machined parts meets the requirements. It is very convenient to use the numerical control system to control the spindle speed, and it is very difficult to adjust the spindle speed by mechanical methods.

6 The functions of several numerical control systems described in the conclusion are not applicable to other electrical control systems in the application of combined machine tools. The use of numerical control system provides a guarantee for the expansion of the combined machine tool in the field of processing, and the development of CNC combined machine tools will be very broad.

System design, commissioning and application.

Defined for the main machine in machines controlled by other electrical methods

(Finish)

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