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How CNC machining centers can avoid safety hazards in operation

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Update time : 2019-10-25 10:13:23
The CNC machining center is a highly trusted equipment in the modern processing industry. It has high machining precision, high efficiency and labor saving. However, it requires high quality for operators and programmers. It is used by programmers and operators when operating CNC machining centers. The highly serious attitude will evade many safety hazards in the operation of CNC machining centers, which will greatly protect our own safety and work safety.

Here are a few things to introduce:

1. The programmer and the operator should be careful about the decimal point when writing the program.

The FANUC system is the minimum setting unit when omitting the decimal point, and most domestic systems and some systems in Europe and America, when omitting the decimal point, is mm, which is the calculator input mode. If you are used to the calculator input method, there will be problems on the FANUC system. Many programmers and operators may use both systems to prevent problems due to decimal points.

In order to make the decimal point conspicuous, the isolated decimal point is often written as a "0" form during programming. Of course, zeros after the decimal point of the value are ignored when the system is executing.

2. When adjusting the workpiece coordinate system, the operator should set the reference point beyond the physical (geometric) length of the tool, at least at the tool point of the longest tool.

For the workpiece coordinate system on the workpiece mounting diagram, the operator obtains the machine coordinate system offset on the machine. That is, the operator sets a reference point on the machine tool and finds the size between the reference point and the zero point of the workpiece coordinate system set by the programmer, and sets this size as the workpiece coordinate system offset.

On the lathe, the reference point can be set at the center of rotation of the tool holder, on the tip of the reference tool or at another location. If no additional motion is added, the zero commanded by the programmer moves the reference point of the tool holder (machine) to the programmed position. At this time, if the reference point is set at the center of rotation of the tool holder, the tool holder must collide with the workpiece. In order to ensure that there is no collision, the reference point on the machine tool should be set not only outside the tool holder, but also outside the tool. This way, even if the tool is mounted on the tool holder, the reference point will not collide with the workpiece.

On the milling machine, the reference points of the X and Y axes are on the spindle axis. However, the reference point of the Z axis can be set at the spindle end or at a point other than the spindle end. If at the spindle end, when the command is zero, the spindle end will reach the zero position specified by the coordinate system. At this point, the end face key of the spindle end will collide with the workpiece: if the spindle is loaded with a tool, it must collide with the workpiece. To ensure non-collision, the reference point on the Z axis should be set outside of all tool lengths. The reference point does not hit the workpiece even if no other motion is attached.

3. When adjusting the tool length offset, the operator should ensure that the offset value is negative.

When the programmer commands the tool length compensation, the T code command is used for turning, and the G43 command for milling is used to add the tool length offset value to the command value. In the direction of the machine axis, it is specified that the direction of movement of the tool away from the workpiece is positive, and the direction of the tool moving closer to the workpiece is negative. The operator adjusts the tool offset value to a negative value, which is to command the tool to move to the workpiece. When the tool is commanded to approach the workpiece, in addition to the command value, the offset value of the tool is added. This additional value is moved to the workpiece. At this point, if the value is missed, the tool will not reach the target point.

In order to set the tool offset value to a negative value, it must be set outside the tool length when specifying the reference point on the machine tool, at least at the tool point (point) of the reference tool.
https://www.infignos.com/templates/updatelistingnow.cfm?email=ryanlee901213@gmail.comShenzhen Kangda Precision Manufacturing Co.,Ltd.,Machining Manufacturer,Shenzhen,FL