Both CNC manufacturers and large and medium-sized CNC processing enterprises need experience summary to achieve lean production. Lean tool design and anti daze method, cell line, automation and other lean production technologies implement lean improvement items in the model, and reflect the improvement benefits to the manufacturing cost items through the model, and the programming process must avoid impact. As we all know, CNC is very expensive, and the boss couldn't cry when he hit the computer.

1. Coordinate system and tool compensation must be set correctly

When starting the CNC machining center, it is necessary to set the reference point of the CNC machining center. The working coordinate system of CNC machining center should be consistent with the programming, especially in the z-axis direction. If there is an error, the possibility of the cutter colliding with the workpiece is very high. In addition, the setting of the tool length compensation must be correct, otherwise empty machining or collision will occur.

2. Simulation display function of CNC machining center

Advanced CNC machining centers generally have graphic display functions. When the program is input, the graphic simulation display function can be called to observe the tool path in detail and check whether the tool collides with the workpiece or fixture.

3. Use the empty operation function of CNC machining center

Using the no-load running function of CNC machining center, the correctness of tool path can be checked. When the program is input to the CNC machining center, the tool or workpiece can be installed, and then press the idle operation button. At this time, the spindle does not rotate, and the workbench automatically runs according to the program track. At this point, it can be found whether the tool will collide with the workpiece or fixture. However, in this case, it must be ensured that when the workpiece is installed, the tool cannot be installed; when the tool is installed, the workpiece cannot be installed, otherwise there will be collision.

4. Use the locking function of CNC machining center

General CNC machining center has locking function (full lock or single shaft lock). After entering the program, lock the z-axis, and judge whether the collision will occur through the coordinate value of the z-axis. The application of this function should avoid tool change operation, otherwise the program cannot pass.

5. Coordinate system and tool compensation must be set correctly

When starting the CNC machining center, it is necessary to set the reference point of the CNC machining center. The working coordinate system of CNC machining center should be consistent with the programming, especially in the z-axis direction. If there is an error, the possibility of the cutter colliding with the workpiece is very high. In addition, the setting of the tool length compensation must be correct, otherwise empty machining or collision will occur.

6. Improve programming skills

Programming is an important part of NC machining. Improving programming skills can largely avoid unnecessary conflicts.

7. Use computer simulation system

With the development of computer technology and the development of NC machining teaching, there are more and more NC machining simulation systems, and their functions are more and more perfect. Therefore, it can be used in the preliminary inspection procedure to observe the movement of the tool to determine whether there is the possibility of collision.

In the process of using lean production technology to reduce manufacturing costs, enterprises are faced with problems such as unable to effectively cut in, unclear objectives, mismatch between improvement projects and cost loss projects. The feasibility of the model is verified by the actual operation of the production workshop of the specific CNC processing enterprise as the carrier, and the practical cases and specific methods are provided for the enterprise to adopt lean production technology to reduce the manufacturing cost, providing reference for the industry.