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Types of CNC machining centers

Many friends who are new to machining centers don’t know much about machining centers, so occasionally some customers will ask what kind of CNC machining centers there are. CNC machining center we have had a lot of introduction, to introduce the types of CNC machining center, CNC machining center in the end what kind? After reading the following content introduction, you will understand.

1、 What kinds of CNC machining centers are there

In fact, CNC machining centers can be divided into vertical machining centers and horizontal machining centers according to the structure of CNC machining centers. CNC machining centers can be divided into vertical machining centers and horizontal machining centers according to their structures, which can be divided into vertical machining centers, vertical machining centers, vertical machining centers, and horizontal machining centers Horizontal machining center, gantry machining center, high-speed machining center, drilling and drilling center are all types of CNC machining centers.

2、 Recommendation of different products of CNC machining center

We have already talked about the types of CNC machining centers. At present, the types of CNC machining centers of mingwan machine tools include vertical machining center, gantry machining center, high-speed machining center and drilling and drilling center. Let’s introduce their respective advantages. Vertical machining center is our most commonly used machining center, and so are our small machining center A kind of vertical machining center, with the characteristics of miniaturization and high cost performance, gantry machining center is called the terminator of Dali Canada. Our gantry machining center can replace vmc1270, vmc1370 and vmc1580. With many advantages, the price is lower than Dali plus. The high-speed machining center is mainly used to make high-precision and high-finish products, with 12000 rotary direct spindle. Drilling and tapping center tool library is different, mainly used for making precision 3C products.

Installation of a and C rotating shafts of five axis vertical machining center

Five axis machining centers are not new to you. Five axis vertical machining centers generally have five moving axes, which are three linear axes / (XYZ /) and two rotating axes / (AB /) or / (AC /), which are represented by different representation methods according to their installation positions. Today, I mainly introduce the installation position of a and C rotating shafts of five axis vertical machining center.

The A and C rotation axes of the five axis machining center can be installed in different positions. For example, the A and C rotation axes can be installed on the worktable or the spindle, or they can be installed on the workbench or the spindle respectively. The A and C rotation installation positions of the five axis machining center are mainly determined by the product. In the market, the A and C rotation of the common five axis vertical machining center are both Installed on the workbench, there are few other types of installation. Now let’s introduce it to you.

Five axis machining center a, C rotation axis is installed on the worktable

In general, the A, C rotating shaft is installed on the worktable in this way, and it is the most seen in the market. Because of the limited size of the workpiece, this kind of installation method can not process large workpieces or load the machining center, because the bearing capacity of a rotation is limited.

Five axis machining center a, C rotation axis is installed on the spindle

There are few ways to install a and C rotating shafts on the main shaft. This kind of a and C rotating shaft installation mode is used to process large workpieces, and its load capacity is stronger than that of installing a and C rotating shafts on the workbench. Therefore, this kind of a, C rotating shaft installation method will be used in processing large-size workpieces.

The A and C rotating axes of the five axis machining center are respectively installed on the worktable and the spindle

In general, the a-axis is installed on the main shaft, while the c-axis is installed on the table. This kind of a-axis and c-axis installation mode is also relatively rare. It can process large-scale workpieces and grab the load capacity.

Groove tool for vertical machining center

Many novices don’t know what tools to use when programming. When they encounter surfaces, grooves, holes, etc., they don’t know what tools to use. I believe many inexperienced novices have no idea about this matter. Xiaobian has some experience in using tools here. Today, I’d like to share them with you. Of course, it’s very difficult for beginners to introduce what kind of tools to use according to the processing procedures Digestion, so today I only introduce what kind of tool is used to process grooves.

What kind of tool is used for machining groove in vertical machining center

It is normal to use vertical machining center to process grooves. Of course, not only vertical machining centers can process grooves, but also other CNC machines can process grooves. The groove mentioned here can be easily understood as a straight groove. Experienced programming engineers will use a flat milling cutter to process the straight groove. Using the flat milling cutter to process the straight groove not only has good chip removal ability, but also has high machining accuracy, which can control the machining accuracy well. Therefore, it is better to use the flat milling cutter to process the groove.

What other CNC machine tools can be grooved

In addition to the vertical machining center can add grooves, there are many CNC machine tools can also process grooves, such as CNC milling machine, gantry machining center and so on. These CNC machines can also process grooves. Because there are many CNC machines that can process grooves, we will not list them one by one.

The belt drive spindle of machining center has abnormal sound

After using the belt drive spindle machining center for a long time, it is found that the spindle box belt has abnormal noise, whether it is in forward or reverse rotation, there will be some noise. According to many years of experience, most of them are belt problems. As long as we start from the belt of the main shaft, we can find out the key problem of making noise.

The belt tension of the spindle connected to the servo motor is too high

The tension of the belt connecting the main shaft to the servo motor should not be too tight. If it is too tight, it will easily lead to the wear of the belt, slip and make abnormal noise,

The belt tension between the spindle and the servo motor is too low

The tension of the belt connecting the spindle to the servo motor should not be too low. If the tension is too low, it will appear that the belt connecting the spindle to the servo motor is too loose. In this way, it is easy to cause slipping and make abnormal noise during heavy cutting.

The belt connecting the spindle to the servo motor is damaged

In general, the machining center has been used for a long time, and it is inevitable that there will be some defects, such as the transmission belt, which will wear after a long time, which is also one of the reasons for the abnormal noise of the belt. Therefore, the better quality of the drive belt to use a longer time, poor quality drive belt use time is shorter.

The tooth profile of the drive belt does not match that of the servo motor and the spindle

As the drive belt of the machining center is used for a long time, it will cause some wear, so many customers purchase the drive belt to replace it in order to save the cost. After replacement, it is found that the tooth shape of the drive belt is not consistent with that of the servo motor and the spindle, which will cause abnormal noise during use. It is suggested that customers should pay attention to whether the model of the purchased drive belt is the same as that of the removed worn belt. If different types of drive belts are used persistently, the abnormal noise of the belt in the transmission process will be caused, and even the gear wear of servo motor and spindle will be caused, resulting in serious consequences.

Vice Clamp installed in machining center

Vice clamp is installed on the working table of machining center

In fact, the installation method of vice clamp is very simple. Firstly, move the vice onto the workbench of the machining center, correct it to the pre-determined position, and then fix the locating block under the Vice Clamp in the T-groove of the working table of the machining center. This method is to prevent the vice clamp from deviated from the position corrected before the re cutting process, and also confirm the vice clamp position The parallelism and verticality of the fixture. This will allow the fixture to be installed.

Key points for installation of workpieces

Just after the vice clamp has been installed, then it will introduce how to install the workpiece on the clamp just now.

Before installing the workpiece, the parallelism and verticality of the workpiece shall be confirmed. If the parallelism and verticality are poor, the clamping force after the installation of the workpiece cannot be guaranteed.
It is necessary to ensure that the workpiece is installed in the middle of the clamp, and the clamping force of the clamp is consistent with the center of the workpiece, and there will be no offset.
Pay attention to not too hard when installing workpiece clamping, otherwise excessive force will cause deformation and poor machining accuracy.
The two used gasket must be of the same model. The same type of gasket referred to here is the same size and material of gasket. If the gasket is not the same type, the parallelism and verticality of the workpiece will be poor, which directly affects the processing accuracy of the workpiece.

Machining center and drilling center

1、 What is the difference between machining center and drilling center?

In general, the manufacturers of production and processing centers will produce drilling centers, but manufacturers specializing in drilling and drilling centers may not necessarily save other types of machining centers. Drilling and drilling center is essentially a type of vertical machining center, because the drilling center itself is derived from the vertical machining center. So today mingwan machine tool will take you to understand the similarities and differences between the two.

Machining center refers to the high efficiency automatic machine tool which is composed of mechanical equipment and numerical control system, which is used to process complex shapes. I believe that we all know more about them, so we will not do more narration here. “Drilling and tapping center” is “drilling”: drilling and milling or drilling, “tapping”: tapping, “center”: machining center. (the full name is roughly several: “drilling and milling tapping center”, “drilling and tapping center”, “drilling and milling machining center” and “drilling and milling center”). It is also derived from the traditional metal cutting machine tool computer gong (machining center), so from the structure, the drilling and tapping center and the high-speed machining center are the same. The drilling center and the high-speed machining center also have the functions of drilling and tapping and high-speed milling. The advantages of drilling and tapping Center in “drilling and tapping” are better than that of high-speed machining center, and the fast moving feed of high-speed milling is faster than that of flexible high-speed processing But the model is less, the stroke is smaller than the high-speed machining center, and the cutting force is inferior to the high-speed machining center.

2、 What are the similarities between machining center and drilling center?

Processing center and drilling center, from the literal point of view, both have the word “center”. It can be seen that they are both metal cutting machines and CNC machining equipment. In style and function, machining center and drilling are very similar.

3、 What is the difference between machining center and drilling center?

Machining center is widely used, mainly for processing plane, curved surface and other shapes of equipment. The drilling and tapping center is mainly used for drilling and tapping. The machining center can be used for milling, but the drilling and tapping center can only be used for slight milling, because the power of the spindle of the drilling and tapping center is not very large, so it can not be used for strong milling and heavy load processing. In shape, the drilling center is smaller than the machining center in shape; the shape of the drilling center is similar to the form of large turntable. In the selection of tool magazine, the machining center is mainly the hat type tool library and the disc type tool library, while the drilling center is mainly the turret type tool library and the turret type tool library. In terms of fast moving speed, linear guide rail is used in drilling and tapping center, which is faster than machining center. The machining efficiency of machine tool is obvious.

Advantages of ball screw in machining center

Ball screw is composed of screw, nut, steel ball, prepress, reverser, duster and other parts. It is the best product to convert rotary motion into linear motion or linear motion into rotary motion. It is widely used in machine tools, automatic machinery, electronic machinery, aerospace and other fields. Ball screw has a variety of advantages, now by mingwan machine tool to take you to see what advantages of ball screw!

Less power

The driving force of the ball screw is only 1 / 3 of that of the sliding screw pair, so it has higher movement efficiency, so it can save more electricity.

Higher precision

Ball screws are produced by high-level mechanical equipment, and the production accuracy is higher.

Realize micro feed

The ball screw uses the ball motion, so the starting torque is very small, there will be no creeping phenomenon like sliding motion, so it can ensure the realization of accurate micro feed.

No side clearance and high rigidity

The ball screw can be preloaded, because the preload can make the axial clearance reach a negative value, and then get higher rigidity.

Realize high speed feed

The ball screw can realize high speed feed / (movement /) because of its high efficiency and low heating.

CNC computer gong vacuum sucker

1、 What is the vacuum sucker of CNC computer gong

Vacuum suction cup, also known as vacuum spreader, is one of vacuum equipment actuators. Generally speaking, it is the cheapest way to grab the product with vacuum sucker. There are various types of vacuum suction cups. Rubber suction cups can be operated at high temperature. The suction cups made of silicone rubber are very suitable for grasping products with rough surface, while those made of polyurethane are very durable. In addition, in the actual production, if the sucker is required to have oil resistance, polyurethane, nitrile rubber or polymer containing vinyl can be used to make sucker. Generally, in order to avoid scratches on the surface of the products, it is better to choose the suction cup with bellows made of nitrile rubber or silicone rubber. The material of suction cup is made of nitrile rubber, which has large breaking force, so it is widely used in various vacuum holding equipment.

2、 Vacuum sucker used in CNC computer gongs

The vacuum chuck plays the role of fixture in CNC machining center. Some workpieces require high surface smoothness, so they can’t use the fixture of common CNC computer gong. At this time, the vacuum chuck can be put into use. However, we seldom use rubber vacuum cups in CNC computer gongs. We use CNC vacuum cups more. The so-called CNC vacuum sucker is a kind of special vacuum suction cup with vacuum generator and switch. The suction principle is the same as rubber vacuum chuck, which creates a vacuum environment to make the suction cup press on the workpiece under atmospheric pressure, but CNC vacuum chuck is the only one The vacuum environment is produced by the vacuum generator. The rubber vacuum chuck is a simple vacuum component, while the CNC vacuum sucker is like a large plate.

CNC computer gongs usually use vacuum chuck because the workpiece has high requirements for surface smoothness, or when the fixture of CNC computer gong itself can not clamp the workpiece well, it is a relatively cheap special fixture in CNC machine tools

Four axis high speed machining center

1、 Four axis high speed machining center

High speed machining center and machining center have three axes, four axes and five axes. Three axis and four axis high-speed machining centers are used more, while five axis high-speed machining centers are rare because of the high price.

High speed machining center is a kind of high-speed machine tools. High speed machining center is mainly used for mass production of small parts and products. It is also one of the most used CNC machine tools. Under normal circumstances, the default axis of high-speed machining center is three axis. If the fourth axis needs to be added, the customer needs to make a request to the manufacturer. The processing range of four axis high speed machining center is wider than that of three axis high-speed machining center. For the same brand and the same type of high-speed machining center, four axis is definitely better than three axis, because it can process some complex workpieces.

2、 Characteristics of four axis high speed machining center

In the above, we said that the machining range of four axis high speed machining center is wider than that of three axis machining center, so what is the reason? Four axis high speed machining center has one more dividing head than three axis high speed machining center, which is the source of the fourth axis. Among the six degrees of freedom of the workpiece, the three axis high-speed machining center only uses three basic x, y, Z linear degrees of freedom, and the remaining three a, B, C rotation degrees of freedom are not used, and the four axis high-speed machining center selects one of these three degrees of freedom, and then installs the corresponding dividing head.

Speed of high speed machining center

High speed machining center is a common machining center in the market. It is widely used in the fields of automobile, machinery and hardware. Because the processing speed of high-speed machining center is fast, and the quality is stable, the production efficiency is greatly improved, which is the advantage of high-speed machining center. The biggest disadvantage of high-speed machining center is that it is not suitable for heavy cutting, but only suitable for finishing. For example, some workpieces with large cutting force are difficult to be processed by high-speed machining center.

Processing speed of high speed machining center

As is known to all, the cutting speed of high-speed machining center is 5-10 times faster than that of ordinary machining center. According to the hardness and strength of materials, the processing speed is different. Aluminum alloy is 1500-5500 M / min; copper alloy is 900-5000 M / min; titanium alloy is 100-1000 M / min; cast iron is 750-4500 M / min; steel is 600-800m / min. The feed speed range of high-speed cutting for various materials is 2-25m / min. From these data, we can know how fast the processing speed of high-speed machining center is, which is beyond the ability of general machining center.

The field of high speed machining center

High speed machining center involves many fields of processing, such as automobile, machinery, train, ship, aircraft, aerospace and mold. The parts in these fields can be processed by high-speed machining center. No matter how high the precision requirements are, it is difficult to defeat the high-speed machining center, because in addition to the advantages of high-speed machining, high-speed machining center also has the advantage of precision machining. High speed machining center is also called high precision high speed machining center.