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What is CNC boring?

What is CNC boring

What is CNC boring

What is CNC boring?

CNC boring refers to expanding or refining the original holes on the workpiece. The boring feature of CNC machining is to correct the eccentricity of the lower hole, to obtain the precise position of the hole, and to obtain high-precision roundness, cylindricity and surface finish. Therefore, boring is often used in the final process.

Compared with other machining, CNC boring is a kind of difficult machining. By adjusting only one blade (or blade holder), it processes micron sized holes like H7 and H6.

What are the characteristics of CNC boring?

1、 Tool rotation:

CNC machining is different from lathe machining. Due to tool rotation during machining in machining center, it is impossible to master the condition of tool tip in time during machining to adjust the feed amount, etc. It is also impossible to change the machining diameter just by adjusting the CNC button like the CNC lathe. This has become a big obstacle to automatic processing. Because the machining center does not have the function of automatic machining diameter adjustment (except for the one with U-axis function), the boring cutter is required to have the function of fine adjustment mechanism or automatic compensation, especially in the case of fine boring, it is sometimes adjusted at the micron level according to the tolerance requirements. In addition, the direction of chip flow out is constantly changing when boring in machining center, so the cooling of tool tip, workpiece and chip discharge are much more difficult than when machining in lathe. Especially when the vertical machining center is used for steel blind hole rough boring, the problem has not been solved up to now.

2、 Spring knife:

Spring knife is a common and headache problem in boring. The main reasons for the spring knife in the machining center are as follows:

1. Rigidity of tool system: including the rigidity of tool handle, boring bar, boring head and intermediate connecting part. Because it is cantilever machining, especially the machining of small holes, deep holes and hard workpieces, the rigidity of the tool is particularly important.

2. Dynamic balance of tool system: relative to the rotating axis of tool system, if the tool itself has an unbalanced mass, it will cause chatter due to the effect of unbalanced centrifugal force during rotation. Especially in high-speed machining, the dynamic balance of tools has a great influence.

3. Fixed rigidity of workpiece itself or workpiece: for example, some smaller and thinner parts cannot be fully fixed with reasonable jigs due to insufficient rigidity or workpiece shape.

4. Blade tip shape: the cutting resistance is also different due to the different front angle, escape angle, tip radius and chip breaking groove shape of the blade.

Teach you six steps to be proficient in CNC machining

Teach you six steps to be proficient in CNC machining

Teach you six steps to be proficient in CNC machining

In order to be a master in any industry, you must be able to stand the experience of time and improve your working ability. In the CNC processing industry, it will take at least 6 years to become a master in numerical control (metal cutting) since you graduate from university and enter the factory. He needs not only the theoretical level of engineers, but also the practical experience and hands-on ability of technicians. Kaicheng Precision Hardware Co., Ltd. will share with you: it is not difficult to learn CNC machining well. Dongguan Kaicheng Precision Hardware Co., Ltd. will teach you six steps to play with CNC machine programming!

Step 1: it must be an excellent craftsman without the support and trust of employees. It is impossible to become an excellent craftsman.

Step 2: proficient in NC programming and application of computer software.

Step 3: be proficient in CNC machine tools. It takes 1-2 years of study. The operation pays attention to hand feeling. Beginners, especially college students, understand how to do it in their hearts, but they just don’t listen to the instructions. In this process, we need to learn: the operation mode of the system, the installation of the fixture, the alignment of the part benchmark, the tool alignment, the setting of zero offset, the setting of the tool length compensation, the radius compensation, the loading and unloading of the tool and the tool handle, the cutting edge grinding of the tool, the measurement of the part (can skillfully use the vernier caliper, the micrometer card, the dial indicator, the dial indicator, the inner diameter lever gauge, etc.). Can reflect the level of operation is: horizontal processing, and large gantry (moving beam, top beam) processing. Operation practice needs savvy! Sometimes there is a kind of mood of “leisurely mind, wonderful place is difficult to say with you”. In the numerical control workshop, you can calm down and practice well! Generally speaking, the process of Kaicheng precision hardware from the processing of the first part to the processing accuracy is required to be completed by the numerical control programmer himself. You can’t operate the machine skillfully. This level can’t be passed.

Step four: have a good foundation of fixture and measurement technology. The difficulty of fixture analysis lies in the fact that it is only qualitative and difficult to quantify. If you have no experience in fixture design and parts clamping, it will be more difficult. In this respect, it is recommended to consult the precision coordinate boring machine and Kaicheng precision hardware technicians. When measuring the level accurately, one of the basic skills in machining is to be able to skillfully use vernier caliper, micrometer card, dial indicator, dial indicator, inner diameter lever gauge, caliper, etc. Sometimes when machining parts, CMM can’t be expected.

Step 5: be familiar with CNC machine tools. Proficient in the maintenance of CNC machine tools.

Step 6: CNC machining should cultivate good habits and adapt to the characteristics of CNC machining.

What problems should be considered in CNC machining to control dimensions?

What problems should be considered in CNC machining to control dimensions

What problems should be considered in CNC machining to control dimensions

In CNC machining, if we want to keep the dimension stable when machining aluminum parts, we need to consider the following two factors:

1、 Force Majeure:

1. Stability of machine tool itself.

If the machine tool is not brand-new or the machine tool has too many CNC machining and has not been debugged, the size deviation caused by the machine tool itself may occur. The deviation factors of machine tool itself are as follows:

Mechanical:

a. The servo motor and the lead screw are loose.

b. The ball screw bearing or nut is worn.

c. Insufficient lubrication between screw and nut.

Electrical:

a. Servo motor failure.

b. There is dirt inside the grating ruler.

c. Servo amplifier failure.

2. Thermal expansion and cold contraction deformation of workpiece.

The deformation of the workpiece after heat expansion and cold shrinkage is inevitable, so we should pay attention to the cooling effect, increase the frequency of in-process measurement, and pay attention to the deformation of the workpiece after cooling.

2、 Avoidable factors:

CNC processing technology

In order to control the machining error, it is necessary to have a reasonable machining process. In the process layout, in addition to the basic machining process (such as milling the basic machining process (such as “first rough and then fine, first face and then hole, first big face and then small face” or the basic machining process details such as “reduce the number of clamping, use the combined clamp as much as possible”) in the use of the fixture, it is also necessary to minimize the number of machining process details We all know that the aluminum parts are very soft due to the processing error caused by the aluminum scraps, and the waste scraps removed can easily cause the processing error of the aluminum parts.

2. Three cutting elements: cutting speed VC, feed F, cutting depth AP and tool compensation

In this respect, simply speaking, on the premise of ensuring the tool wear and machining quality, adjust the cutting parameters so that the cutting performance of the tool can be brought into full play, so as to achieve the highest cutting efficiency and the lowest machining cost.

In the numerical control lathe, there are other factors to be considered, such as cutter head wear compensation.

3. Numerical calculation of manual programming

In the manual programming, it is very common that there are errors in the calculation process. Although it is almost automatic programming now, we should pay more attention to it if we encounter the situation of manual programming.

4. Accurate knife setting.

If the tool setting is not accurate, it will also cause dimensional errors. Therefore, it is necessary to choose a better edge finder. If conditions permit, the machine tool should be equipped with a laser tool setting instrument to ensure the accuracy of the tool setting. If there is no edge finder and no condition, only a simple trial cutting method can be used!

The above is a summary of CNC machining, easy to make the accuracy error of several factors.

What are the advantages of CNC machining?

cnc turned

cnc turned

Nowadays, there are more and more processing technologies around us. In order to meet the demand of the market, various processing technologies are invented to meet the use of the market and consumers. What are the advantages of CNC processing?

1. Complicated process content

This is because the price of CNC machine tools is higher than that of ordinary machine tools, and the simple process of CNC machining is not cost-effective economically. Therefore, the complex process is usually arranged on CNC machine tools, so that it is difficult to complete the process on ordinary machine tools.

2. More detailed layout of work steps

This is due to the problems that need not be considered in the CNC machining process of ordinary machine tools, such as the layout of working steps in the process, tool setting points, tool changing points and the determination of machining path, etc., which can not be ignored in the preparation of CNC machining process.

3. Rely on the procedure to complete all process.

4. NC machining program is a directive document of NC machine tools.

5. CNC machine tools are controlled by program instructions, and the whole process of machining is automatically stopped according to program instructions.

6. The NC machining program not only includes the process of parts, but also includes the process parameters necessary to complete the process, such as cutting parameters, feed path, tool size number and the movement process of the machine tool.

7. CNC machining efficiency is high, machining accuracy is high, labor intensity is low, and it is strong to adapt to different workpiece.

What are the various methods of precision parts machining

What are the various methods of precision parts machining

What are the various methods of precision parts machining

With the development of the machining industry, many machining methods have also been developed, which has brought functions or advantages to our use. How good is its development? All of these are obvious to all. Precision part processing is one of them. What are the various methods of precision part processing?

The process method of precision parts machining includes the application of the programmability of the machining center to reasonably program the NC machining, and the application of the humanized operation of the machining center to optimize the cutting parameters. Kaicheng Precision Hardware Co., Ltd. reasonably selects the geometric shape of the cutting tool, and adopts the common high-speed steel drill and end mill to process high-precision and large aperture ratio titanium alloy holes.

The applicability of improved cutting tools, optimized cutting parameters and processing methods are verified through the processing of practical samples. Titanium alloy is a kind of widely used superalloy, which is mainly used in the manufacture of maintenance shell of logging tool

Therefore, the processing technology of titanium alloy for hardware precision parts has a direct impact on the quality of titanium alloy products, which involves the stop of cutting titanium alloy, especially the processing technology of deep hole drilling, and how the processability of deep hole drilling determines the application scope of titanium alloy.

The existing technology of precision parts machining is to use the mixed ceramic bearing to match the smooth oil, which may not be a problem when the spindle is at 15000 R / min. We also found that some manufacturers also use another kind of bearing, whose inner and outer edges are still composed of metal plates, but the rotating parts are composed of ceramic materials with strong rigidity and durability. Heat is the natural enemy of bearing precision and life.

When the main shaft runs to 10000r / min, it is more representative to use oil mist instrument system. Chengchuang this system provides less (but sufficient) smooth oil to reduce the heat generated by the bearings, in addition, the blowpipe also helps to dissipate the heat. The rest of the heat is transferred to a cooling system that does not cause circulation and is blocked.

What is the application of precision machining in electronic products?

precision machining

precision machining

Electronic products are related products based on electric energy, including smart phones, electronic watches, computers, video recorders, etc. these products are more or less used by everyone in daily life, while mobile phones and computers, almost everyone has them. But do you know that most of these inseparable products and structural parts are made by precision machining? What is the application of precision machining in electronic products?

First of all, we are very clear that when we buy an iPhone that is crazy inside, or a Mac computer that program apes have been in love with for a long time, we will assemble some coats (protective shell or protective sleeve) for it, because if the naked machine falls to the ground and bumps, it is easy to cause the scratch of the device shell, thus affecting the beauty. The equipment casings we carefully protect come from precision machining. The iPhone has used the so-called aviation grade aluminum magnesium alloy casings since the 6th generation. At present, the mainstream brand mobile phones on the market mostly use aluminum magnesium alloy, with the advantages of light weight, good heat dissipation and high strength. However, due to the complexity of its processing, it needs to be processed with precision machinery to achieve a very high precision. To a certain extent, it is seamlessly combined with the mobile phone to prevent water and dust, so the price is high.

Of course, this technology is not only applied to the mobile phone shell, but also to many metal structures inside the mobile phone. In order to ensure the compatibility of the machine and parts and the stability of the performance of the equipment in the process of operation, the parts need to have quite high precision. Therefore, this kind of parts without standard fall into the production of major domestic processing plants.

It is not difficult to understand from the above, for example, the parts, nuts and shells inside the notebook computer, the movement, needle and buckle in the electronic watch all use the precision machining technology correspondingly. This technology is widely used, but we are in the layman did not pay much attention to and understand.

CNC Machining cial folding roll part for Surgical mask machine

Surgical mask machine

Surgical mask machine

CNC Machining cial folding roll part for respirator equipment, Our factory undertakes all kinds of standard parts / non-standard parts processing of Surgical mask machine.Automation equipment accessories. Welcome to send drawings for consultation.

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