Processing and application operations CNC machine tools should pay attention to several questions. Shandong Institute of Civil Engineering and Mechanical and Electronic Engineering Department Wang Lancheng hand pulse manual feed spindle manual operation manual drilling interrupt operation needs to pay attention to the actual question.
CNC machine tools are new types of machine tools that have been developed using the latest scientific and technological achievements. From the operational point of view, it can be roughly divided into two parts, which are electrical control parts; it is the mechanical processing execution part. There are a few practical questions to be taken when operating a CNC machine.
When starting the CNC machine, the weak part of the electrical part should be activated first, and then the strong part of the mechanical part should be activated. After the two parts are started, the machine is in the standby state. At this time, the state selection knob should be rotated to the 01 position. Use the manual pulse generator to move the corresponding axial direction away from the mechanical origin by more than a millimeter. Then, turn the state knob to ZRN or 0%. The axis returns to the machine origin. Note that for vertical CNC milling machines, the 2 axes should be returned to the machine origin to prevent the tool from interfering with the workpiece or fixture. When referring to the reference point, please pay attention to 1 each time you select an axis to return to the reference point. After the reference point return end light is on, select the first axis to return to the reference point. 2 Move each axis away from the reference point, or enter an emergency stop state. The reference point return end light is off; when the reference point is 3, the distance of each axis from the reference point should not be too close. Otherwise, an overtravel alarm will be issued.
Since the main application of the CNC machine tool controls its automatic cycle for machining, there is no external operating handle, and when it is manually controlled, it needs to be carried out through the electrical part. Since the manual feed is amplified by the circuit, the hand feel is very poor, and it is easy to cause an excessive amount of feed and cause an accident, especially when manually drilling, it is easy to break the drill bit. Therefore, when drilling, special attention should be paid to observing the cutting condition and feeding evenly.
In addition, during manual adjustment of the machine or manual machining, care should be taken to select the moving axis and the direction of movement before proceeding. At the same time, attention should be paid to the adjustment of the feedrate override to prevent accidents caused by collisions between the tool and the workpiece during the manual process.
The manual pulse feed of the MPG pulse generator should pay attention to the following aspects: 1 mode selection switch is placed in the position of the hand pulse 10; 2 the position of the pulse axis axial selection switch is placed on the axis to be fed; 3 select the appropriate pulse pulse Equivalent; 4 Turn the MPG clockwise or counterclockwise to move the selected axis in the positive or negative direction.
The manual operation of the spindle 1 places the mode selector switch in the manual position; 2 presses the spindle manual operation button 501 to reverse, the spindle can be started; 3 the spindle speed adjustment switch 5, 0300 can be used to adjust the spindle speed; 4 press the stop 5 The D button can stop the spindle from rotating. Pay attention to the manual operation of the spindle. After each power-on, you must enter the 5th command spindle motion command on 1 page. 5 instructions can be saved in the 0 system after each input or after running the program, until the shutdown. In the future, the spindle can be started manually. First, if there is a strict requirement for manual speed, you need to use the MDI page to input the required S command before starting the spindle manually. First, when the forward and reverse directions are reversed, the middle must be Press 5 â–¡ 0, then reverse operation to prevent the impact inertia from affecting the accuracy of the spindle.
In the automatic operation process, there are two ways to stop the automatic operation, which are stopped by the instructions contained in one execution, that is, the relevant river command; the other method is to press the feed on the operation panel at any time during the execution of the program. Keep the button, 0 piece 31 or 01 only on the panel to stop.
When an emergency situation occurs, press the emergency stop 5 button 0 to interrupt the machine operation. When using the option to stop the river 01 command, it must be noted that only when the stop button is selected on the operation panel, when the button is turned on, the button light is on, and the 401 code is activated. Otherwise, even if programmed with 01, it will not affect the execution of the program.
When the machine stop is interrupted by pressing the emergency stop button, after starting the machine again, it is necessary to restart the machine origin operation. Otherwise, it is easy to produce unexpected actions. This is because during the automatic operation, the computer's reader's subsequent instruction segment has been waiting for execution in the buffer memory during the execution of the previous instruction. It is because there is a segment instruction waiting to be executed in the buffer register. The next time the automatic loop is started, it may affect the execution of the program and unexpected situations may occur. Therefore, after an emergency stop, be sure to pay attention to the operation of returning to the machine origin to clear the computer memory and confirm the machine origin.
When stopping the CNC machine, before the machine stop, observe the force of each part of the machine table, so that it is in a state of good stress. Then, first close the mechanical part, then turn off the electrical part, and finally pull down the power switch.
Clean up the site and make the machine have a good working environment.
(Finish)
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