Monthly Archive September 21, 2020

The overall work of CNC processing can be said to be simple, but the simple work needs to be developed to the best from all aspects, and now the technology of CNC processing has been improved relatively well. It is precisely because these CNC processing has improved rapidly, and the workload is also relatively good. Now The industry of CNC processing is also in contact with more industries, and now the precision of CNC processing is also very high, and now CNC processing technology, in fact, popular in the market maturity is also very high, and in all aspects now CNC perfect is relatively good, but now, how to choose.

The sliding contact surface of hard rail is large, with good rigidity, strong anti-seismic ability and strong bearing capacity, which is suitable for heavy load cutting. The hard rail belongs to dry friction. Due to the large contact surface, the friction resistance is also large and the moving speed cannot be too fast. At the same time, it is easy to produce crawling phenomenon, and the clearance of moving surface will lead to machining error. The maintenance of machine tool track is the top priority. Once the rail lubrication is not sufficient, it will cause rail burning or wear transition, which is fatal to the accuracy of the machine tool. In terms of the speed of the heavy rail and the high precision of the heavy rail, the high precision of the workpiece can be achieved through the hard rail. The cutting force of the line rail is smaller than that of the hard rail, but for the hard rail, the line rail of many machine tools has greatly improved its bearing capacity. The application of line rail is suitable for high-speed machine and can be used for high-speed cutting. It is suitable for processing products and small precision molds. Nowadays, more precision machining centers use line tracks.

The overall work of CNC processing can be said to be simple, but the simple work needs to be developed to the best from all aspects, and now the technology of CNC processing has been improved relatively well. It is precisely because these CNC processing has improved rapidly, and the workload is also relatively good. Now The industry of CNC processing is also in contact with more industries, and now the precision of CNC processing is also very high, and now CNC processing technology, in fact, popular in the market maturity is also very high, and in all aspects now CNC perfect is relatively good, but now, how to choose.

The sliding contact surface of hard rail is large, with good rigidity, strong anti-seismic ability and strong bearing capacity, which is suitable for heavy load cutting. The hard rail belongs to dry friction. Due to the large contact surface, the friction resistance is also large and the moving speed cannot be too fast. At the same time, it is easy to produce crawling phenomenon, and the clearance of moving surface will lead to machining error. The maintenance of machine tool track is the top priority. Once the rail lubrication is not sufficient, it will cause rail burning or wear transition, which is fatal to the accuracy of the machine tool. In terms of the speed of the heavy rail and the high precision of the heavy rail, the high precision of the workpiece can be achieved through the hard rail. The cutting force of the line rail is smaller than that of the hard rail, but for the hard rail, the line rail of many machine tools has greatly improved its bearing capacity. The application of line rail is suitable for high-speed machine and can be used for high-speed cutting. It is suitable for processing products and small precision molds. Nowadays, more precision machining centers use line tracks.

When we work to understand its performance, especially in CNC machining, so that there will be no problems, affecting the work. Because CNC machine tools are not directly controlled by people, but affected by the program, Dongguan CNC machining center reminds you that many technicians, due to their negligence in operating the machine tool, cause program input errors, programming errors, and correction errors, resulting in errors in tool driving, and tool collision accidents often occur. Today, I’d like to discuss with you how to avoid this kind of knife collision accident.

In fact, there are traces to follow. CNC machining center after the actual detection, due to the machining center maintenance difficulty and high cost, and processing parts mainly rely on the accuracy of the machine tool to ensure, once the equipment accident, the accuracy of the machine tool will be seriously reduced. In fact, the avoidance method is also very simple, before the simulation processing, you should first confirm whether the machine tool is locked. Then, after running the simulation without load, check whether to return to the reference point, because the coordinates are not consistent with the actual position when checking the program. In this case, the method of returning to the reference point must be used to ensure the coordinate consistency.

Finally, when the specified line is running, the coordinate system such as g54 and the length compensation value of the cutter must be called first in CNC machining center. Because the length compensation value of each knife is different, it may cause knife collision if it is not called. To sum up, mastering the programming skills is the premise. We should use various methods to verify the program and run the correct settings. When operating, we should be careful, careful and focused to avoid unnecessary errors, which can effectively avoid the occurrence of knife collision and better protect the CNC machine

No matter what kind of work we do, we should understand its various indicators, especially in CNC processing, so as not to affect our work. In the process of CNC processing, we need to master certain knowledge, to be familiar with its process, so that the production process can be more smooth. When it comes to CNC machining, it is a very high precision process. There are a lot of preparations to be made. What are the main requirements? Let’s introduce CNC processing professionals to you. After understanding, I believe you will master a lot of knowledge in this area.

CNC machining in the quality requirements are very strict, and we want to do more refined and high-quality, first of all, our CNC precision has a great impact on the processing, so we should pay attention to its machining accuracy and machine tool accuracy these two different concepts. Therefore, in order to better do these aspects, we need to know more about CNC processing, because this is the most basic. First of all, we regard the position accuracy on the manufacturer’s sample or product certificate as the machining accuracy of machine tool, which is wrong. The position accuracy indicated on the sample or certificate is the accuracy of the machine itself, while the machining accuracy is the sum of the errors caused by various factors of the whole process system including the allowable error of the machine tool itself. The evaluation method of process capability can be used as the basis of precision selection. Generally speaking, the calculation result should be greater than 1.33, which is a relatively accurate basis.

In addition to the influence of precision on CNC machining, the rigidity of our machine tool will also directly affect the productivity and machining accuracy. The processing speed is much higher than that of ordinary machine tools, and the motor power is also higher than that of the common machine tools of the same specification. Therefore, the rigidity of the structural design is far higher than that of the ordinary machine tools. Therefore, we can make orders according to the technological requirements, allowable torque, power, axial force and maximum feed force. According to the value provided by the manufacturer, we will check the value of awesome products. If we understand it, it will be of great help to the quality of the products. Secondly, in order to obtain the high rigidity of the machine tool, it is not limited to the size of the parts, but the machine tool with 1 or 2 sizes relative to the size of the parts is selected.

We have a lot of processing methods, especially CNC processing, we are familiar with it is relatively high. CNC machining center is an automatic machine tool with high efficiency and many functions. Bearing is a part of CNC machining center. Its main function is to support the rotation of the machine, reduce the friction coefficient and ensure the rotation accuracy. In this chapter, we mainly talk about the methods of bearing disassembly.

1、 Percussion method

When striking, the force is concentrated on the inner ring of the bearing. This method is simple, but easy to damage the bearing. When disassembling, pad the bearing with objects under the ground, and then use a hammer to knock the bearing down.

2、 Pull out method

Using a special puller, the bearing can be pulled out only by rotating the handle. It should be noted that the puller should be stuck on the end face of the bearing inner ring and the bending angle of the puller should be less than 90 °.

3、 Pushing method

This method can be realized with the help of a press, and is relatively safe for the bearing, but it should be noted that the force point of the press should be placed on the center of the shaft.

4、 Hot tearing method

Pour the bearing with an oil pot of about 100 ° onto the bearing. According to the principle of heat expansion and cold contraction, the bearing will expand after being heated. At this time, the puller can be used to pull it out. Use this method to be a little small, to avoid scalding.

As the saying goes, details determine the success or failure, so we should pay attention to the details and know the specific operation method when CNC processing, so as not to affect our work. When we find problems in the process of use, we should solve them in time, so as not to cause trouble to our work. Today, I’d like to learn how to do if the spindle of CNC machining center does not rotate, as follows:

1. First of all, we should know whether we can see the parameters after 9000, and if we can see them, whether the parameters are needed. I have encountered such a situation, it is 0i-MC system, all axes are normal, that is, the main shaft does not rotate. Later, we changed the parameters after 9000.
2. There was an oi-m in the previous unit which had a similar situation. Finally, it was found that the pneumatic valve of the tool arm was stuck. After the tool change was completed, the tool arm should be ready for the next knife, but the knife arm was not put down, and there was no alarm. After the valve was replaced, it was OK. And whether there is a hydraulic fixture, the fixture is not tightened, or the clamping signal is disconnected.
3. Take a look at the spindle monitoring, turn the spindle by hand to see if there is any value? Is the value correct? Once encountered, there is no alarm, the spindle does not rotate. No monitoring value. Adjust the interval. Or replace it with a new one.

In order to improve our work efficiency, CNC machining is often carried out around us, so we are familiar with it. No matter what we use, we should pay attention to maintenance, CNC machining center is mainly used to process parts. The bearing determines the bearing capacity of a machining center. If the bearing performance is good, the bearing load will also be large. Therefore, we should do a good job in the daily maintenance of the bearing, so as to keep the performance of CNC machining center in the best state and prolong the service life of the bearing. How to maintain the bearing in CNC machining center? Let’s take a look at the following:

1. First, clean the bearing in gasoline, wipe off the oil sludge and dust left on the bearing, and gently wipe and polish the rusty bearing with metallographic sandpaper until there is no roughness by hand.
2. Dry the cleaned bearings with dry rags, and then soak them in antirust oil. In this process, the bearing should be completely in contact with the antirust oil, and the bearing should not be stopped. Only in this way can the oil film formed by the antirust oil cover the surface of the bearing and achieve the purpose of antirust.
3. Next, apply lithium grease and grease evenly on the surface of the bearing, including inner and outer rings, wheels and cages. And it is to wipe while rotating the bearing, so that the grease really into the bearing, play a full role in lubrication