Analysis of problems affecting the working efficiency of machining centers

Due to the influence of various factors, a considerable number of machining center users have low application level, low machine tool starting rate and utilization rate, which directly affects the improvement of the economic benefits of machining center users. Common problems mainly include the following:

1. Inadequate technical preparation

It mainly shows that the tools are not prepared in place, the NC program is not well prepared, and the machine tools, fixtures and measuring tools are not matched. As the machining center stops to wait for the completion of the above work, the actual operation time is directly affected.

2. The technical level is not high

It includes two aspects: First, the technical level of NC programmers is not high. The programming time is long, and the program is not concise and reasonable, resulting in long standby and debugging time of the machining center, and even many functions of the machining center can not be fully played. Second, the operator of the machining center has low technical quality. It is mainly manifested in the slow understanding of the NC program, the lack of knowledge of machining process, the poor ability to comprehensively judge and handle various situations in machine tool processing, and the inability to eliminate small common faults, which make the non machining operation and adjustment of the machine tool take too long.

3. Poor management

Due to the short application time of machining centers in some enterprises, many enterprises lack the management experience of machining centers. In production, poor planning, poor scheduling and poor logistics often occur, making the machine tool standby time too long. In addition, a considerable number of users believe that the machining center is a precision equipment, and the general workpiece processing and rough machining processes are not arranged in the machining center, which artificially limits the processing objects to a very small range, resulting in insufficient tasks. Other enterprises arrange workpieces that are not suitable for processing in the machining center or arrange workpieces with poor blank quality, which leads to frequent quality accidents during processing and affects the operating rate of the machine tool.

4. Improper selection

Some enterprises can not make full use of the machining center due to improper selection of its type and specification, resulting in long-term idle.

5. Low reliability

The low reliability of the machining centers used by some enterprises leads to frequent failures, especially the automatic tool change system and the CNC system often break down and cause downtime.

6. Weak maintenance

At present, the maintenance force of the user units of most domestic machining centers is still weak. Once the machine tool fails, it cannot be repaired quickly, and some even rely on the maintenance personnel of the manufacturer. In this way, the machining center is bound to be shut down for a long time.

7. Poor working environment

If the voltage fluctuation of the power grid is too large, a sudden power failure, and the grounding wire of the machine tool is not properly handled, the components of the CNC system may be damaged. In addition, too much dust, too high humidity, and too high room temperature are directly related to the frequent failures of the machine tool.