CNC flame cutting machine is the main equipment for sheet metal processing. It is actually a CNC machine tool. Its processing tool is flame torch or plasma torch. The user can realize the automatic cutting by implementing the NC machining program to realize the control of the trajectory of the lance and related devices .
First , the problems and countermeasures of CNC flame cutting machine
1. Since CNC flame cutting machine generally adopts open-loop or semi-closed loop control, mechanical precision and transmission clearance will affect the accuracy of positioning. This problem still exists in other retracting processing modes, which can improve mechanical precision and reverse The gap compensation is overcome.
2 , because the CNC flame cutting machine is a rough machining, the cutting flame diameter is large, the cutting path can not be too dense, so the operator can locate the torch through the naked eye within the allowable range of the program.
The retracting machining is an indispensable function of the CNC flame cutting machine. Since the retracting path and the retracting distance of the arbitrary path retracting processing function are not limited, the utility model has higher efficiency and more convenient operation.
Second , the characteristics of CNC flame cutting machine arbitrary path retreat processing
Any path retraction machining means that when the retracting machining is required, the cutting torch can be directly retracted to the processed area without being restricted by the path. The system automatically finds the closest point to the cutting torch on the machining path and moves to the point. Point, and then start automatic processing to solve the problem of non-penetration of the plate during the machining of the CNC flame cutting machine. Any path retraction processing has the following characteristics:
1. The retreat process can be quickly retracted directly to the point that needs to be reworked, without returning to the original processing path, which can improve the processing efficiency;
2 , can be rolled back to any point of the processed part, the distance of the retreat and the number of track segments are not limited and do not depend on the storage space of the control system;
3 , when the retreat does not require the operator to accurately align the original trajectory, the system can be moved directly to the original processing trajectory according to the nearest principle when starting the machining again;
4. It can be paused at any time during the retreating process, or it can be moved forward to any point to continue processing in this mode, that is, it can be retracted or advanced.
When using the CNC flame cutting machine , the plate cannot be penetrated in the uncertain section due to the unevenness of the processed plate, the insufficient gas pressure for cutting and the unreasonable setting of the processing parameters, resulting in automatic cutting. carry out. When this happens, the operator is required to suspend the automatic machining. The retracting machining method is used to retract the cutting torch along the original processing path to the front of the unpenetrated section, and then start the machining to re-cut the unpenetrated section. . Since there are possible problems such as program jumps, loops, subroutine calls, etc. and flame radius compensation in the machining program, it is very difficult to implement the retracting machining according to the machining program.
The existing control system of CNC flame cutting machine generally adopts the method of track storage to realize the back-off processing, that is, allocate a certain storage space inside the system, store the processed trajectory data, and analyze the stored processing trajectory when performing the retraction processing. Data is implemented in the same way, this method is currently widely used, but the following problems exist:
1, since the control system storage space limitations, the system can record the length of the track is very limited, the conventional CNC flame cutting machine main system memory typically only 30 - 50 executed processing path segment, if the operating personnel outside this range After the problem is discovered, the rollback processing cannot be realized.
2 , this way can only achieve the return according to the original processing path, but can not directly return to the line segment that needs to be reworked, and after the unpenetrated section is processed, it can only advance along the already processed trajectory, so it takes up More time, the efficiency is very low.
Jiangmen Duramp Electric Co., Ltd , https://www.durampled.com