Why did the milling machine go through so many tests?

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Ordinary milling machine usually through the following test items: 1, noise test 2, absolute vibration and relative vibration test 3, thermal deformation test 4, static stiffness test 5, transmission efficiency test 6, vibration resistance cutting test 7, excitation test 8, position accuracy test 9, rotary precision test 10, linear motion uniformity test 11, transmission accuracy test 12, the processing accuracy test.

Why did the machine tool go through so many tests? Here we analyze some of these test items.

1.Noise is generally required at 83 dB. High noise will affect the health of the workers. The main reasons of lathe noise is: (1) bearing. Ordinary machine tools generally choose the bearing P5 level, the higher the bearing level the more accurate the worse. (2) gear transmission. Mainly due to the accuracy of the gear is not fine grinding caused by the processing, of course, there are transmission hole pitch error generated. (3) the milling machine is not installed in accordance with the installation standards.

2.Spindle accuracy test. Usually milling machine spindle accuracy test shaft end beating can not exceed 0.005mm, check at 300mm required to control the following 0.03. This accuracy test is important because the spindle beating the assembly affects the machining.

3. Position accuracy test, that is, the corresponding accuracy of the machine tool inspection. Machine tools must go through the factory before the accuracy of detection. This test directly affects the milling machine in the processing of the workpiece, the size of the workpiece size greatly affected, it is difficult to achieve the overall size of the workpiece.

4. Milling machine thermal deformation test.

This test is to check the accuracy of the milling machine in motion. This check is to ensure that the milling machine is machined in the length of the workpiece length of the workpiece, regardless of the detection X, Y, Z direction accuracy is to use this feature to ensure the workpiece size and plane size of the workpiece, so as to ensure the accuracy of the relative size of the workpiece.Reasons for the accuracy of this: (1) the workpiece material has not been aging or not heat treatment. (2) milling machine main workpiece processing accuracy is not high generated. (3) the workpiece scraping precision is not the greatest impact on this precision.

5. Cutting experiment. Detection of machine tools, installation, clearance, scraping and other comprehensive testing problems will be exposed in the cutting test, which is very important to the factory before the test.

Do you know the way to transform the machine?

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The development of the industry can not be separated from milling machines, lathes, planers, boring machines, grinding machines and other basic equipment. With the continuous development of industry, the market and the production of machinery requirements are getting higher and higher.

Market development of the workpiece's overall accuracy requirements are also getting higher and higher, some simple roughing equipment has been difficult to meet customer requirements.

Enterprises need to constantly improve the product to achieve high efficiency, high precision, high automation goals. Early in order to solve the problem of efficiency, many companies out of a number of functional single, low efficiency machine. There are many companies to put some simple planer out, into a milling machine, because the planer can only do some simple linear processing, the process is very simple and low efficiency.

The milling machine can process some complicated parts and the planer is not. And milling machine to install some special accessories can be completed many complex processes.

The most commonly used, such as dividing head, turntable and so on. In the factory on the milling machine operators of the technical requirements will be high, to the enterprise to increase the cost of skilled workers. This problem is particularly prominent in some developed countries, fewer and fewer skilled workers, because people do not want to engage in such a demanding, difficult work.

Later, engineers have gradually developed a CNC machine tools. CNC milling machine the most widely used, not only high efficiency, high precision, but also the technical requirements of the operator is not high. As long as the input process CNC machine tools can be completed. Processing of the workpiece size uniform, but also for the next step to provide a convenient product assembly, but also for the maintenance of the product to facilitate. Later, the installation of the knife library to complete the high quality, high standards of the product.

Some of the mechanical transformation is due to the actual production and market demand between the problems, engineers seeking to solve the problem in the process of design ideas. Of course, there are some high-level design experts to lead the development of mechanical products, but such experts rarely.

How do I check if the milling machine you purchased is qualified? let me tell you!

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When you buy a universal milling machine, how can you test whether it is qualified? Although each milling machine in the factory will undergo a rigorous inspection, but in order to purchase a universal milling machine you have a comprehensive understanding, you can also systematically check. Here we talk about the milling machine check the note.

Step 1: Open the accessory box, check the attachment and purchase the contract is consistent, there is no omission.

Step 2: Check the appearance of the milling machine. Whether the paint is firm, the appearance is smooth, no sagging, blistering white, loss of light and obvious orange peel, scars or grinding scratches. General castings and metal parts before painting must be thoroughly anti-rust treatment to ensure that the surface of the workpiece before painting without sand, rust, oil. Whether the installation of the sign is accurate and uniform. Whether the stickers are firm, neat, uniform, there is no side. Whether the X / Y / Z-axis machine travel is required. Refueling, shake the hand pump, observe the oil pipe is oil. Open the horizontal milling and vertical milling box lid refueling to the oil standard center line 2-3mm, turn on the power, spindle rotation, observe the oil window is oil. After a period of time, check whether the various parts of the universal milling machine oil leakage phenomenon. No oil leakage after the situation.

Step 3: turn on the power, automatic operation, try to stop the button, press, the operation stops. Power off - connected - power off, repeated and repeated 3-5 times. Emergency stop device is effective, rapid and sensitive.

If there is a decibel, then you check the noise. 1 meter from the machine will be decibel instrument open to see if more than 80dB (qualified machine does not allow more than 80dB). If there is no decibel, you can listen to whether the spindle in the rotation when there is abnormal screams and irregular impact sound. Next time we talk about how to check the accuracy of universal milling machine.

Do you know the difference between a lift milling machine and a bed milling machine?

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There are many types of milling machines, such as lift milling machines, bed milling machines, bench milling machines, rocker milling machines and so on. Different types of milling machines have their own different characteristics, performance and use.

Here we talk about the difference between the lift milling machine and the bed milling machine. The main feature of the lift milling machine is that the lift can be moved up and down on the bed, and the bed milling machine table can not move on the base, and its milling head part can move up and down the bed. Due to the different structural characteristics, so we have to choose according to their own needs.

If you need to process some of the major large or heavy workpieces, this workpiece is adjusted to adjust the movement of the positioning is not convenient, and move the workpiece is not conducive to processing, but also affect the processing of precision and quality. The best choice for this case is bed milling. Because the bed milling machine table is relatively low, start the installation of the workpiece more convenient, and the workpiece in the vertical direction of the workpiece does not move, by moving the milling head up and down movement, the table before and after the movement to be processed. This work out of the workpiece high precision, to ensure product quality. General bed milling machine with ball precision screw, machine running up high precision, so the processing of product quality is guaranteed.

The milling head of the bed milling machine is generally equipped with universal milling head, turret milling head, vertical milling head and so on. Their common feature is that the milling machine will be equipped with high-power motor, cutting torque, high efficiency. The milling machine is smaller than the power of the bed milling machine.

Because it is in the X, Y, Z axis can be moved, and the milling head does not move, so the main feature of the lift milling machine is convenient and smart, wide range of use, but not suitable for processing large parts. It is used for factory maintenance, farm processing and so on. Each machine has its own characteristics, need to choose according to your actual needs.

Do you use the special accessories of the milling machine correctly?

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Many users will choose a lot of accessories when purchasing a milling machine, such as dividing head, turntable, digital display, plug and so on. Customers are rarely used or will not use these accessories after they have been purchased, which greatly reduces the special features of the accessories.

We will now discuss the digital display functions and use. Many tools can be installed digital display, such as lathes, milling machines and so on. As long as the linear motion of the machine can be installed digital display.

Today we only talk about how to choose and apply the digital display on the milling machine. Digital display is generally installed grating ruler and ball grid scale, easy to read the number of intuitive. Because the ball grid scale is fully sealed, it can work in water, oil, polluted environment, affected by the temperature change is very small. The grating ruler is reflected by the light refraction to the sensor to read the data, the temperature, the environment is required. Customers in the purchase of milling machine, according to their own use of the environment to choose to install.

General milling machine relative to the CNC milling machine in the precision requirements on the not too high. Milling machine after a year or two after use, the transmission screw more or less will wear, the accuracy will be more or less affected, it is normal. With the grating ruler, the ball grid scale is very convenient, because the milling machine will have a reading when the display. But many of the friends installed later only to read, rarely use other features.

For example, you can use it to re-angle the workpiece, and drilling in the processing of circular lines, drilling holes in the circle. So we recommend that you have to correctly select the grating ruler and the ball grid scale,and after installation to carefully read the instructions. Because it can be re-processing of special-shaped parts and curves processing parts, can be convenient, fast and accurate to solve many problems. We will introduce the proper use of other attachments later.

Multi-function milling machine is not a universal milling machine!

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What is a universal milling machine, what is a multi-function milling machine?

According to my 33 years of experience in the machine tool industry, let me talk about my views. Whether it is a multi-function milling machine and universal milling machine, its main feature is based on the milling machine, that is, first it should be a milling machine. No matter how the transformation and how to assemble, it should not change the basic characteristics of milling machine.

Figure 1

Our usual practice is to add attachments on the milling machine to implement other functions, or to implement other functions through modular design. But we see some of the machine on the market is not in the milling machine on the basis of the transformation, but with some other machine tools, and some even the milling machine is only as a subsidiary, this machine should not be called universal milling machine, but Should be called multi-function machine, or even should not be called multi-function milling machine. These inaccurate names are also easy to mislead consumers. To be precise, a universal milling machine is a milling machine that can process multiple angles or have multiple functions.

Do not know if you agree with the identity, the following examples to illustrate:

The first machine(Figure 1) is in the drilling machine on the basis of the transformation of the drilling milling machine. We just modified the workbench, you can let the table before and after the move only. So we call it a drilling milling machine.

Figure 2

Look at the second machine(Figure 2), it is in a lathe on the basis of a drilling machine, to meet the rework of the workpiece on the workpiece drilling function. And some small milling machine to achieve the workpiece in the shaft on the milling function. So manufacturers call it a multi-functional home machine.This machine is in the lathe to install some auxiliary agencies to achieve multi-functional. Its main function is not a milling machine, so it is not accurate to call him a universal milling machine.

The third machine(Figure 3) is a milling machine, you can install the plug, dividing head, turntable. The milling head can be rotated 360 degrees to achieve different functions. We can see that a milling machine because it can have multiple uses, you can process different parts. It is the main part of the milling machine, so we call it universal milling machine. And even some companies to a horizontal milling machine is also known as universal milling machine, I think this is not correct.

Figure 3

We are a professional milling machine manufacturer. To use a professional attitude to accurately tell you what kind of product is the real universal milling machine. If I am wrong, please correct me. Thank you.

Do you understand the modular design?

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The modular design began in the 1950s. Advocate suggests that this theory is based on green environmental protection.

Let's talk about what is a modular design. In the machine tool industry, the machine to maintain the original basic functions under the premise of the same, through the installation of different accessories and institutions to achieve different functions. List a practical example of Smithy. Through the main body of the lathe to install the drilling machine to achieve the milling and drilling function; can also be installed in the lathe small milling machine, by moving the lathe vertical and horizontal trays to achieve the function of milling.

There are also companies through the installation of simple grinding wheel to achieve the function of turning milling. This also gives some of the current turning and milling compound center, CNC machine tools to provide a theoretical basis. And the different combinations on the machine to achieve different functions.

This modular design must be to change the small parts or change the secondary components to achieve different structures and functions. Such as the X6336WA milling machine and the LM1450A universal milling machine. X6336WA is a vertical turret milling machine, it was also called universal milling machine. It has vertical milling and horizontal milling function, the use of milling head can be achieved drilling, milling, tapping and other functions. We do not change its basic structure, such as the base, lift, slide, table, bed, etc. These are the same. We can only convert from a turret milling machine into a universal milling machine by simply changing the boom.

You can also achieve different performance by placing a component in a different location. Designers must know the premise is to change the small change, change the secondary does not change the main, we must do uniform workpieces uniform, assembly size and structure size should be unified. This also provides convenience for production and processing. For the organization to improve production efficiency, save inventory, reduce consumption, quickly meet customer requirements for different products.