CNC machining tools are divided into standard tools and non-standard tools. In general, standard tools can meet the processing of most common parts, and these standard tools have been standardized, standardized, and can be easily bought on the market.

The tool suppliers, most of the door-to-door sales are also standard tools, and often give a detailed catalog, which not only has a simple diagram of the standard tools, size, but also a variety of parameters, etc., suitable for processing what materials, what processing parameters are used, etc. are generally more detailed.

At present, there are several well-known tool suppliers who maintain business relations with Tianfeng Technology, and the competition between the tool manufacturers is also fierce.

In addition to standard tools, it is naturally a non-standard tool. Some special parts processing, process processing, when the standard tool can not meet the needs, it is necessary to design the corresponding non-standard tool.

Such a non-standard tool design is often requested by the process technician of the factory, the tool supplier proposes its own tool design, and the process technician confirms it, and the tool supplier produces these non-standard tools according to the drawings.

After the manufacturing of these non-standard tools is completed, the verification processing will be carried out, and if the verification machining is qualified, the factory will purchase these non-standard tools from the tool supplier.

In addition to the use of standard tools, there is also a non-standard tool, that is, a deep hole turning tool.

Because the paddle shaft is hollow, just like a thick cylinder, the outer circle needs to be turned, and the inner hole also needs to be turned.

Li Tianfeng's eyes are so vicious, he can see at a glance that this deep-hole turning knife will have zài problems. Seeing Li Tianfeng say that there was a problem with this deep hole turning tool, Liu Yi was stunned, and felt very strange in his heart, does the CEO of such a large company also understand technology.

Liu Yi met Li Tianfeng for the first time today, and he didn't know much about Li Tianfeng, which is understandable. You must know that Li Tianfeng not only understands technology, but also has unfathomable technical attainments, which many people admire.

Liu Yidao: "Mr. Li, this is a joint design of our senior technicians, processing such a deep hole, this deep hole turning tool should not be a problem, I think you can start the processing of formal parts now." ”

Although Liu Yi was polite and humble, his tone revealed a little confidence and certainty, seeing this, Li Tianfeng smiled lightly, did not refute, and said lightly: "Then try to process formal parts." ”

The worker master of the Shenyang CNC lathe next to him had already made preparations before the machining, and when he saw Li Tianfeng speak, he immediately closed the safety door of the machine tool and pressed the start button of the processing program.

The machine bed came with a burst of beeps, and began the formal processing, and from the sound, a qiē normal, through the glass of the safety door of the lathe, was seeing the sharp outer turning tool, a large number of rapid turning parts, a large number of metal chips, at a visible speed to be turned down.

This processing efficiency is still good!

The rough machining of parts is to process with high efficiency, and under the premise of ensuring the processing quality of parts, the process that can be completed within one hour can never be completed in two hours.

Processing efficiency is economic efficiency. The longer the processing time drags on, the worse the economic benefits, because the loss of the machine tool is calculated by the hour, the wages of the workers, the cost of water and electricity, etc., which have a great relationship with time, in addition, the loss of the tool is also related to the time.

In terms of processing efficiency, Zhang Can has inherited Li Tianfeng's thoughts and views, and it can be seen from the processing of this paddle shaft that the processing efficiency is relatively high.

Time is a minute, a minute passes, a qiē is normal, Liu Yi couldn't help but glance at Li Tianfeng, and thought in his heart, in the end, he is the boss, technically it is still not good, after processing for so long, he has not seen any abnormalities.

Liu Yi is a tool salesman, not a tool technician, only knows some fur about machining, and it is enough to deal with tool sales, but in a situation like now, Liu Yi does not know that the processing program is still turning the outer circle of the paddle shaft, and it is not yet the turn to turn the inner hole of the paddle shaft.

Zhang Can is completely different from Liu Yi, Zhang Can believes that Li Tianfeng said that there is a problem with deep hole turning tools, so when processing, more than ninety percent will have problems, Zhang Can racked his brains and thought, what is the problem? What processing anomalies can occur?

But don't have a big problem, otherwise, it will not be good if the parts are scrapped, in that case, the fun will be great, Zhang Can thought in his heart, and then quietly looked at Li Tianfeng, seeing that Li Tianfeng looked calm, carefully looking at the processing of parts, Zhang Can was a little relieved.

After more than ten minutes, the outer circle of the paddle shaft was processed, and the oxide scale of the blank surface was turned off, revealing a shiny surface, which could be seen clearly from the glass of the safety door of the machine tool.

At this time, the tool holder disc of the machine tool begins to retreat, and begins to retract, with a "hiss" sound, and the tool is quickly withdrawn, which means that the first rough turning of the outer surface has been completed.

Seeing that the machine tool began to retract, Liu Yi thought that the processing was over, and couldn't help but glance at Li Tianfeng again, and the look seemed to say, Mr. Li, there is no problem with the tool, it is normal.

Li Tianfeng naturally understood Liu Yi's eyes, and couldn't help but say lightly: "It's just that the outer circle of the part is processed, the machine tool is retracting, and after the tool is changed, the inner hole processing will begin." ”

Not finished yet? Liu Yihu looked at the technician He Lin next to him suspiciously, in Liu Yi's eyes, the technician He Lin had the most right to speak.

He Lin also said lightly: "Liu Gong, it's still early to complete the official processing, and I estimate that this rough turning process will take an hour." ”

An hour, now the processing has only passed ten minutes, that is really early.

After Li Tianfeng saw the retraction, the machine tool immediately began to automatically change the tool, and replaced it with the deep hole turning tool, Li Tianfeng couldn't help but say: "Reduce the processing speed by 50%." ”

Although I don't know why I want to reduce the processing speed at this time, the worker master still faithfully executes it, and the rate of the machine tool will be 50%.

CNC machines have a magnification adjustment knob that can be adjusted from zero to 120 percent, or even 150 percent, or even higher.

Under normal circumstances, if there is no special description in the process, 100% multiplier processing is generally used, so that what is the turning speed used in CNC machining programming, and how much is the actual processing.

For example, the paddle shaft machining inner hole, rough turning using the turning speed is 200 revolutions, if the processing rate of 100% is used, the actual processing is 200 revolutions, now, the magnification modulation of 50%, then the processing turning speed becomes 100 revolutions.

As soon as the magnification was adjusted, the speed dropped significantly, and at this time, Zhang Can seemed to understand something, and thought in his heart, worthy of Mr. Li, no problem can escape Mr. Li's sharp eyes.

Begin turning the paddle shaft bore.

This is a deep hole, because the paddle shaft is relatively long, the length of the paddle shaft is more than 800 mm, because the middle is a pan hole, the process is processed first, and the processing depth is a little more than half of the total depth of more than 800 mm.

As for why not complete the more than 800 mm through hole processing at one time, it is because, in this way, you need a very long deep hole turning tool, such a long deep hole turning tool, just kidding, that is no, even if such a long deep hole turning tool is designed and manufactured, it will definitely not be able to be used.

Because we know that the more slender something is, the worse the rigidity, the length of more than 800 millimeters, and the length of more than 400 millimeters, those are completely different concepts.

The inner circle deep hole is processed, and it is processed from the outside to the inside.

At first, the processing seems to be relatively normal, but soon after the processing starts, gradually, the processing sound is not normal, and it is becoming more and more abnormal, not only the processing sound is abnormal, the machine tool also seems to be abnormal, it seems to be trembling slightly.

Machining vibration, that is, machining flutter!

This is a phenomenon of bad processing, as soon as I saw this situation, Shenyang machine tool worker master, technician He Lin and others all knew about it, and couldn't help but look at each other, and then looked at Li Tianfeng.

"Flutter occurs and reduces the processing speed by another 10 percent." Li Tianfeng instructed.

This phenomenon occurs because the rigidity of the tool is not enough, can not meet the needs of processing, so flutter occurs during processing, which is a very bad processing phenomenon, leaving obvious vibration marks on the machining surface, digging the knife, or causing the processing size to be out of tolerance.

In the finishing of parts, because of the high precision of such a process, such a phenomenon is not allowed, once found, the best way is to stop processing immediately and solve it immediately.

Now it's rough processing, the situation is slightly better, not so strict, but this is not a good phenomenon after all, and it should be avoided.

To solve the processing flutter, the most fundamental thing is to replace the tool, replace the tool with better rigidity, so that there will be no such phenomenon, and now the paddle shaft processing, this deep hole turning tool is a non-standard tool, it took a lot of effort to design and manufacture, even if you want to replace a better tool, there is no tool can be replaced.

If you can't change to a better tool, you have to do something else.

This is one of the more effective ways to reduce the processing turning speed, because the higher the speed during processing, the faster the speed, the greater the force during turning, reduce the turning speed, the flutter can naturally be reduced quickly, but the processing efficiency is also reduced accordingly.

In addition, in addition to reducing the speed, the depth of the tool can also be reduced, because the smaller the depth, the smaller the force on the tool, and conversely, the greater the depth, the greater the force on the tool.

Of course, reducing the depth of the car is not a very good way, because the depth of the car is reduced, and the processing efficiency is also reduced accordingly.

……

I1153