Consequences and handling methods caused by non-standard operation of CNC milling and punching machines

Its comprehensive processing ability is strong, and the workpiece can complete a lot of processing content after one clamping. The processing accuracy is high, and for batch workpieces with medium processing difficulty, its efficiency is 5-10 times that of ordinary equipment. Especially, it can complete many processing tasks that cannot be completed by ordinary equipment. It is more suitable for single piece processing with complex shapes and high precision requirements or for small and medium-sized batch multi variety production.

It integrates functions such as milling, boring, drilling, threading, and thread cutting into one device, enabling it to have multiple technological means. The machining centers are classified into horizontal and vertical machining centers based on the spatial position during spindle machining. Classified by process purpose: boring and milling machining centers, composite machining centers. There are special classifications by function: single workbench, double workbench, and multi workbench machining centers. Machining centers for single axis, double axis, three axis, and interchangeable main axle boxes.

Users of CNC milling and punching machines must undergo strict training and assessment from the machine tool manufacturer before they can start work, and strictly follow the provisions of the machine tool operation manual during the use of the machine tool. It is strictly prohibited to arbitrarily change the parameters and some important programs set by the machine tool manufacturer in the control system during use, as the setting of parameters will directly affect the function and dynamic characteristics of the machine tool. In addition, users cannot replace machine tool accessories at will, as machine tool manufacturers should fully consider the matching of each link and overall performance when setting accessories.

The positioning accuracy of CNC milling and punching machines is very high, so when making machining processes, it is necessary to complete all the parts that need to be processed in this process as much as possible in one clamping process, in order to avoid the accumulated error caused by multiple processing processes.

In the use of CNC milling machines, it is necessary to reasonably select the cutting tools and cutting quantities. For efficient metal cutting, the machine tool, cutting tools, and processed materials used are several factors that affect processing efficiency and accuracy. If you want to efficiently process high-precision products, you must combine the above points well in order to meet the requirements.

The operation data input of the CNC milling machine must be in accordance with the requirements. If the input is not standardized, it will cause a shutdown. What are the reasons for this? Let's analyze below:

1、 The main reason for the shutdown of CNC milling and punching machines due to non-standard input data

The main reasons for malfunctions in the automatic tool change function of the CNC milling machine during operation include: incorrect input or output signals, short circuits, open circuits, inadequate position detection, disordered tool magazine, errors in the tool counter, and damaged relays; Due to the hydraulic and pneumatic systems associated with it, mechanical jamming, loosening, and other impacts.

2、 The Handling Method for Shutdown Caused by Non standardized Input Data of CNC Milling and Punching Machine

1. Check that the system parameter numbers 1320 and 1321 (stored travel detection) are correct, indicating that the soft limit has not changed. The parameters related to the stroke are also normal.

2. The CNC milling machine has the phenomenon of disorderly cutting and no tool replacement, and it is suspected that there is a problem with the position ring. Executing another processing program that is basically the same as the faulty segment G56 (i.e. the workpiece coordinate system is different), it was found that the machine tool processing is normal. The possibility of damage to the position ring, changes in machine parameters, or loss is ruled out.

3. Suspect machine tool data processing interruption or timing control error, press the emergency stop button, turn off the machine tool power, restart the machine tool, run the problematic program, and the situation remains unchanged.

4. The X, Y, and A coordinate values of G56 and G58 are identical, except for the Z coordinate which is different. Is G58 unusable? It was decided to change G58 in this program segment to G54, set the coordinate values of G58 on G54, and then execute the modified program. The machine tool runs normally.

5. Based on this, it can be determined that either there is an error in the macro program of the G58 function support software, or the coordinate value confirmed by G58 is not recognized by the system (i.e. the execution data provided by NC to the machine tool 'MT' is different from the set data), but instead is memorized as another data, because once the program is run, the direction and position of the tool are not correct, and obviously the latter is more likely.

So, reset the coordinate values of X, Y, Z, and A of G58 to "0", press "REST" to reset, and then re-enter the original coordinate values. The machine tool returned to normal. From this, it can be seen that the fault was caused by an error in the data provided by the panel to the NC due to non-standard input data. By clearing data and re inputting, the fault was eliminated.