2020 – Page 42 – CNC Machining & Turning, Milling, Metal parts

Notes on NC machining

CNC lathe processing is a kind of high precision and high efficiency automatic machine tool, which uses digital information to control the displacement of parts and tools. So what do you need to pay attention to when processing CNC lathe? Let’s have a simple understanding:

Pay attention to the choice of cutting parameters

The cutting speed, feed rate and cutting depth of CNC Lathe will directly lead to tool damage. With the increase of cutting speed, the tool tip temperature will rise, which will cause mechanical, chemical and physical related wear. When the cutting speed is increased by 20%, the tool life will be reduced by 1 / 2. The influence of feed rate on tool wear is smaller than that of cutting speed, but when the feed rate is large and the cutting temperature rises, the tool wear will be greater. Although the influence of cutting depth on the tool is not as great as the cutting speed and feed rate, when the cutting depth is small, the hard layer of the material to be cut will also affect the tool life.

Focus on tool selection

1) In rough turning, the tool with high strength and good durability should be selected to meet the requirements of large back cutting and large feed rate. CNC programming UG communication Q group: 304214709, want to learn NC programming, get no taste of learning raw materials plus this group Oh

2) When finishing turning, the tool with high precision and good durability should be selected to ensure the machining accuracy.

3) In order to reduce the time of tool change and simple tool setting, machine clamping tool and machine clamping blade should be selected.

CNC machining

Pay attention to the selection of fixture

1) Although the general fixture is used to clamp the workpiece, the special fixture is prevented;

2) Parts positioning datum coincide to reduce positioning deviation.

Pay attention to the affirmation of processing route

Machining route refers to the moving track and target of tool relative to parts in the process of NC lathe machining.

1) The machining accuracy and surface roughness requirements shall be guaranteed;

2) The processing route should be reduced to reduce the tool idle travel time.

In the process of NC lathe processing, we should pay attention to the above four concerns. Only by choosing the most appropriate NC lathe processing method can we improve the processing efficiency and accuracy of NC lathe processing.

The above is CNC lathe processing need to pay attention to, hope to help you.

Causes of tool breakage in CNC machining

In the process of work, it is very normal to have trouble, so we should not be too surprised when we encounter a fault. If we want to avoid more failures, we should do a good job of maintenance outside of work. Many new users do not know what to do when they encounter a fault. If you want to solve the problem, you should first find the source of the problem Let’s find out what causes CNC processing?

Maybe it’s the tool. Sometimes it’s not our operation that’s wrong, it’s the accessories. Because the tool is not sharp enough and the strength is not enough, all these reasons will lead to the tool breaking.
It can also be due to material problems, when the aluminum alloy shell is not uniform, uneven soft and hard, or too many impurities can lead to problems.
For clamping, we need to see whether the aluminum alloy shell is clamped firmly and whether the clamp is locked. These reasons are worthy of our attention.
There is also the problem of machine tools. CNC machining machine tool level; whether the voltage is stable; whether the machine lead screw aging and other reasons
The problem of the program is: when writing the aluminum alloy shell processing program, whether the spindle motor speed is too low; whether the cutting amount is too large; whether the machining allowance is reasonable; whether the aluminum chip discharge is smooth.

The above problems are the causes of tool breakage in NC machining. To solve the problem, we must first find out what causes it, so that we can better solve the problem. Today’s editor will talk about it first. If you want to know more information, please visit our website

Hardware processing precision factors

The precision of hardware parts almost determines the quality of the product. The more precise the hardware parts are, the higher the precision requirements will be. So what are the factors leading to the machining accuracy of hardware parts? Let’s have a brief understanding:

One factor is the poor machining accuracy of the parts themselves. Generally speaking, if the dynamic deviation between shafts is not adjusted well during installation, it may also be because the shaft drive chain changes due to wear, which will affect the accuracy of the parts. Generally speaking, it is advisable to adjust the compensation amount from the beginning in order to check the accuracy caused by the deviation of this variety. If the deviation is too large and even if an alarm occurs, it is necessary to check the servo motor to see if its speed is too high.

The two factors are that the overshoot during the operation of the machine tool will also affect the processing accuracy. It is possible that the acceleration and deceleration time is too short, and the appropriate lengthening of the transition time. Of course, it is also very likely that the link between the lead screw and the servo motor is loose.

The three factors are the roundness out of tolerance caused by the linkage of the two shafts, the axial deformation of the circle caused by the mechanical failure, the compensation error of the screw clearance of the shaft, or the deviation of the shaft positioning, which may affect the precision of the detailed parts.

These are the factors that lead to the accuracy of hardware parts processing, I hope to help you.

Repeated positioning error factors

Careful hardware processing is to process raw materials (stainless steel, copper, aluminum, iron, etc.) into a variety of high-density parts by lathes, milling machines, drilling machines, polishing machines, etc. according to the customer’s drawings or samples, such as: screws, motor shafts, mold car parts, fishing gear accessories, dog bones. What are the factors affecting the repeated positioning error? Here we are simple Explain it

The installation deviation of workpieces in the flow between different machine tools: when turning from ordinary machine tools to numerical control machine tools in the process of careful hardware processing, it is necessary to install them from the beginning, so that the repeated positioning deviation of workpieces cannot be prevented. If EDM is also required, the repeated positioning deviation will be increased.

CNC machining

Workpiece repeatedly clamping deviation on the same machine tool: when using ordinary machine tool to process metal parts carefully, if several surfaces need to be processed, several clamping and installation are required. Such repeated positioning deviation will be the sum of repeated installation deviation.

The above are the factors that affect the repeated positioning error. I hope it can help you.

Machining attention

Details? I believe many people are very surprised, because we generally only say what matters to pay attention to? Details are generally less noticed. Many users are like this, but Xiaobian here to remind you that the quality of a product, the success or failure is often determined by some small details, I believe you have heard this sentence, so when doing things, pay more attention to some small details is certainly not wrong, so let’s understand what details should be paid attention to when machining?

(1) The designed process specification shall ensure the processing quality of machine parts (or the assembly quality of the machine) and meet the technical requirements specified in the design drawing.

(2) It is necessary to make the technological process have higher productivity and put the products on the market as soon as possible.

(3) Try to reduce manufacturing costs

(4) Pay attention to reduce the labor intensity of workers to ensure the safety of production.

The above points are the matters needing attention in machining. For more information, please visit our website

CNC programming skills

What are the programming skills of CNC machining? Let’s have a simple understanding:

1、 Using computer to imitate simulation system

With the development of computer technology and the continuous amplification of NC machining education, there are more and more NC machining simulation systems, and their performance is improving day by day. Therefore, it can be used to start the inspection procedure and watch the tool’s activity to determine if there is a possibility of collision.

2、 Using the imitation performance of CNC machining center

Generally, more advanced CNC machining centers have graphic display performance. After inputting the program, we can call the graph to simulate the performance and watch the moving track of the tool in detail, so as to check whether the tool may collide with the workpiece or fixture.

3、 The idling performance of CNC machining center

The accuracy of tool path can be tested by using the idling performance of CNC machining center. When the program is input into the CNC machining center, you may as well install the tool or workpiece, and then press the “idle” button. At this time, the spindle does not rotate, and the worktable automatically runs according to the program path. At this time, you may find out whether the tool may collide with the workpiece or fixture. However, in this case, it must be ensured that when the workpiece is installed, the cutter cannot be installed; when the cutter is installed, the workpiece cannot be loaded, otherwise there will be collision.

4、 Using the locking performance of CNC machining center

Generally, CNC machining centers have locking performance (full lock or single axis lock). After inputting the program, the z-axis is locked and the collision can be inferred by the coordinate value of z-axis. The use of this feature should avoid tool change, or the program can not pass.

5、 The configuration of coordinate system and cutter compensation must be accurate

When starting CNC machining center, the reference point of CNC machining center must be configured. The working coordinate system of CNC machining center should be consistent with that of programming, and it is more and more the target of Z axis. If there is a mistake, the possibility of collision between milling cutter and workpiece is quite large. In addition, the configuration of tool length compensation must be accurate, otherwise, it is either empty machining or collision.

The above is the CNC processing programming skills, I hope to help you.

Maintenance of hardware processing mould

In the current industrial industry, hardware processing is widely used, so the utilization rate is still relatively large, but we all know that these molds will wear after a long time of use, which will lead to some failure problems in the later work and use process. At this time, our maintenance work can play a very good role, so let’s learn how to maintain the hardware processing mold?

After using the hardware mold for a long time, we will find that it is necessary to grind the edge. After grinding, the edge surface needs to be demagnetized again. It can not be magnetic, otherwise it is easy to block.
Check the fastening parts of the hardware mold and check whether the fastening parts are loose or damaged. If there are such cases, the method should be taken to replace the parts with the same specification; check whether the screws and fixed pins are loose, and whether they will jump out to burst the mold. If there is any looseness, lock them with a wrench.
In the process of using the die, the punch is easy to break, bend and gnaw. The punching sleeve is generally gnawed. The damage of punch and punch sleeve also needs to be replaced with parts of the same specification.
Check the tightness of the guide device, add lubricating oil to prevent the mold from overheating and scuffing; conduct anti rust treatment for the non production hardware mold.
During the maintenance of pressing parts and unloading parts, attention should be paid to check whether the accessories of each part are damaged, and repair and update the damaged parts.

The above points are the maintenance methods of hardware processing molds. Good maintenance of molds can well extend our service life, which has many advantages, so we need to do a good job of maintenance. Today we will talk about it. If you want to know more information, please visit our website for detailed information

Attention in NC lathe processing

CNC lathe processing need to pay attention to which points? We have a simple understanding of the following:

Pay attention to the selection of cutting parameters

Pay attention to the tool selection

2) When finishing turning, the tool with high precision and good durability should be selected to ensure the machining accuracy.

3) In order to reduce the time of tool change and simple tool setting, machine clamping tool and machine clamping blade should be selected.

CNC machining

Pay attention to the selection of fixture

1) Although the general fixture is used to clamp the workpiece, the special fixture is prevented;

2) Parts positioning datum coincide to reduce positioning deviation.

Pay attention to the affirmation of processing route

Machining route refers to the moving track and target of tool relative to parts in the process of NC lathe machining.

1) The machining accuracy and surface roughness requirements shall be guaranteed;

2) The processing route should be reduced to reduce the tool idle travel time.

In the process of NC lathe processing, we should pay attention to the above four points for attention. Only by choosing the most suitable NC lathe processing mode can we improve the processing efficiency and accuracy of NC lathe processing.

The above is CNC lathe processing need to pay attention to a few points, I hope to help you.

Tips for machining

During the working period, we certainly want to improve our work efficiency. Of course, these are based on the premise of ensuring the product quality. Then, if we want to improve the work efficiency, we should think about the method in the process of work. The modern processing is to be able to improve the production. If the processing table can not meet the requirements of use, in the production process It will be affected to some extent.

In the process of mechanical processing, due to the increasing speed of modern high-speed cutting, in order to adapt to the processing method, then only to reduce the radius of the tool, improve the moving speed of the main bearing of the machine tool. Meet the use requirements in the process of processing, improve the quality of use.

For the mold in the production process, need to achieve high precision, high stability and high speed processing requirements. Only in this way can we improve the cutting ability of the machine tool in the process of cutting and ensure the effect of machining. The above is to improve the machining skills, want to learn more information, welcome to visit our website for detailed understanding.

CNC machining needs monitoring

What aspects need to be monitored during CNC processing? Let’s have a brief understanding:

Monitoring of rough machining

Machining process monitoring and rough machining focuses on the rapid removal of surplus on the workpiece surface. In the process of automatic machining, according to the set cutting parameters, the tool automatically cuts according to the predetermined cutting path. At this time, the operator should pay attention to the change of cutting load in the automatic machining process through the cutting load table, adjust the cutting parameters according to the receiving force of the cutting tool, and develop the maximum efficiency of the machine tool.

Monitoring of cutting sound

Monitoring of cutting sound in the process of automatic cutting, the sound of cutting tool cutting workpiece is stable, continuous and light, and the activity of the machine tool is stable. With the cutting process going on, when there are hard points on the workpiece or tool wear or tool clamping, the cutting process will be unstable. The instability is that the cutting sound changes, and the tool and workpiece will collide with each other, causing a sensation in the machine tool. At this time, the cutting parameters and cutting conditions should be adjusted quickly. When the adjustment effect is not obvious, the machine tool should be suspended to check the cutting tool and workpiece.

Monitoring of finish machining

Finish machining process monitoring finishing, mainly to ensure the machining size and surface quality of the workpiece, high cutting speed and large feed rate. At this time, attention should be paid to the effect of chip accretion on the machined surface. For cavity machining, we should also pay attention to the over cutting and tool passing at the corner. In dealing with the above problems, the first is to adjust the spray position of cutting fluid to keep the machined surface in cooling condition at all times; the second is to pay attention to the quality of the machined surface of the workpiece. After adjusting the cutting amount, the quality change can be prevented as much as possible. If the adjustment still has no obvious effect, it should stop to check whether the original procedure is correct. Special attention should be paid to the tool position when the inspection is suspended or stopped. If the tool stops in the process of cutting, the spindle suddenly stops rotating, which will cause tool marks on the surface of the workpiece. In general, the shutdown should be studied when the tool is out of the cutting form.

Tool monitoring

The quality of the tool is very high, which determines the machining quality of the workpiece. In the process of automatic machining and cutting, the normal wear and abnormal damage of cutting tools should be inferred by means of sound monitoring, cutting time control, suspension inspection during cutting and workpiece surface analysis. According to the processing requirements, the cutting tools should be treated quickly to prevent the processing quality problems caused by the cutting tools not being handled in a hurry.

The above is CNC processing need to monitor several aspects, hope to help you.