Category Archive Machinery industry

As we all know, diamond tool is the most hard tool among all the tools, and its quality is very good. Its tool has high hardness, high wear resistance and good thermal conductivity, which is widely used in machining center tools. The main characteristics of the tool used in the machining center are high efficiency, high stability and long service life. It is indispensable to use the machining center to process the workpiece with high hardness. There are three kinds of materials used in diamond cutting tools, which are pure natural diamond, PCD diamond and CVD diamond.

1. Natural diamond tools:

Natural diamond has been used as a tool for nearly a hundred years. After fine grinding, the blade of natural diamond tool can be ground very sharp, and can be ground to ultra-thin. After investigation, natural diamond can be finely ground to the edge of 0.002 μ m radius. Using this tool to process workpieces can carry out ultra-thin cutting, and can process the ultimate machining accuracy and smooth surface Said that the surface roughness processed is very low. This kind of natural diamond tool is called irreplaceable ultra precision and ideal tool in the future. Natural diamond tools are easy to use, but they are very expensive. Few enterprises in China are willing to buy such expensive tools.

1. PCD diamond tools:

PCD diamond material is actually polycrystalline diamond, its English name is polycrystal diamond, PCD diamond is made by high temperature and high pressure synthesis technology. Because of the high price of natural diamond, there are synthetic polycrystalline diamond, its price is only one dozens of natural diamond. However, in terms of performance, polycrystalline diamond can not match, for example, natural diamond can fine grind ultra-thin blade, while polycrystalline diamond can not. In addition, in the machining center, the surface quality of workpiece processed with polycrystalline diamond tool is not as good as that of natural diamond tool. Natural diamond tool can carry out ultra-thin cutting of workpiece, while polycrystalline diamond tool cannot For ultra-thin cutting, polycrystalline diamond tools are suitable for finishing, while natural diamond tools are suitable for ultra-fine machining.

1. CVD diamond tools:

CVD diamond is also artificially synthesized. It appeared between 1970s and 1980s and was developed by Japan. CVD diamond refers to the synthesis of diamond films on heterogeneous substrates (such as cemented carbide, ceramics, etc.) by chemical vapor deposition (CVD /). The characteristics of CVD diamond are almost the same as that of natural diamond. The tool made of CVD diamond material can be regarded as perfect. It has the advantages of natural diamond and polycrystalline diamond at the same time.

The angle head of machining center is a very important part of machining center, but some friends who use machining center do not know enough about it, or even use it very little, so it can not give full play to the powerful performance of machining center.

1、 What is the angle head of machining center

The angle head of machining center is a common accessory head in CNC machining center industry in the market today. It is the only kind of accessory that can complete the side processing without secondary clamping the workpiece, especially for drilling, tapping and milling groove machining in some circular holes and small-sized cavities. It is absolutely essential tool. Because of its special and necessary function, the angle head has been widely recognized in the CNC market.

2、 What is the angle head of machining center

1. Gantry special heavy angle head BT50 output BT50
2. Light 90 degree standard angle head — the spindle is BT50 or BT40, and the output is ER40, er32, ER25, ER20, ER16, etc.
3. Non standard angle head – customized, the general cycle is 1-2 months.
4. Special heavy cutting angle head for machining center — the spindle is BT50 or BT40, and the output is BT40.
5. Universal angle head: light universal can rotate 0-180 degrees, heavy universal can rotate 360 degrees.

3、 Application field of machining center angle head

The application of machining center angle head is mainly a specific process. For example: precision workpiece, one-time fixed, need to process multiple faces; hole in hole, milling head or other tools can not probe into the hole to process small hole; machining center can not process inclined hole, inclined slot, etc., such as cylinder, box shell inner hole, when a circle of hole needs to be processed on the periphery of circular workpiece, the fourth axis processing can realize complete automation. The side needs to be processed by various processes, and automatic tool change can be realized by using multiple tools.

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.

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.

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!

1. 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.

1. Higher precision

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

1. 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.

1. 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.

1. Realize high speed feed

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

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.

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.

Machining center is a common processing equipment in the market, which is widely used by major processing enterprises. The machining center can clamp the workpiece at one time, and can complete the processing of multiple faces, so it is favored by the processing industry. Different from other machining centers, the machining center has an automatic tool change device, which is the biggest advantage of the machining center. This automatic tool change device can automatically select tools and automatically exchange and install on the spindle during processing. There are two kinds of tool changing forms, which are manipulator tool changing form and non manipulator tool changing form.

Manipulator tool change form

Manipulator tool change form is generally used in the machining center using disc magazine and chain magazine. The biggest feature of this kind of tool change form is that the tool change speed is very fast, and the whole tool change process can be completed in 4 s. And this kind of tool change form is completed by the manipulator, which is more common in the machining center.

No manipulator magazine (bamboo hat magazine)

This kind of tool change is mainly completed by the tool magazine and the spindle to complete the tool change, and the tool storage direction in the tool magazine should be consistent with the direction of the spindle, otherwise it is impossible to change the tool. During tool change, the tool magazine moves to the tool change position in the direction of the spindle, and the tool is directly taken out or put back by the spindle, and then the tool moves back to the original point. This kind of tool change form usually appears in the machining center using the hat type tool magazine. This kind of tool change form has the advantages of simple structure, convenient maintenance and high cost performance. Its disadvantage is that the tool change speed is slow, and the whole tool change process takes 8 seconds. This kind of tool change is common in machining centers.

There are two common tool change forms in machining center, which are widely used in machining center

The machining center is developed from the basic CNC milling machine. It integrates all the functions and characteristics of the CNC milling machine. Its structure is the same, and the processing technology is also similar. Not only that, the machining center also centralizes the processing functions and processing procedures of various machine tools, which can complete the processing of multiple processes such as milling, boring, drilling, tapping and tapping at one time. OK, the machining center is finished. Let’s take a look at how the machining center is classified and how to classify it.

As far as we know, there are six ways to classify machining centers. The first is to classify according to the relative position of the spindle and the worktable according to the structure; the second is to classify according to the number of control axes; the third is to classify according to the machining process; the fourth is to classify according to the number of worktables; the fifth is to classify according to the tool change mode of the machining center’s tool magazine; the sixth is to classify according to the tool change mode of the machining center According to the machining accuracy of machining center, the five classification methods of machining center.

Classification according to the relative position of spindle and table

According to the relative position of spindle and table, machining center can be divided into four types: vertical machining center, horizontal machining center, gantry machining center and composite machining center.

Classification according to the number of control axes

According to the number of control axes, machining can be divided into three axis machining centers, four axis machining centers, five axis machining centers, six axis machining centers, and other multi axis machining centers.

Classification according to processing procedure

Machining centers can be divided into two categories according to the processing procedures, namely boring and milling and turning milling.

Classification according to the number of worktables

According to the number of worktables, machining centers can be divided into three types: single worktable machining center, double worktable machining center and multiple worktable machining centers.

According to the tool change mode of tool magazine

Machining center can be divided into manipulator tool changing center and non manipulator tool changing machining center according to the tool changing mode of tool magazine.

Classification according to machining accuracy

According to the machining accuracy of machining center, it can be divided into three types: ordinary precision machining center, high precision machining center and precision machining. General precision machining center: the resolution is 1 μ m, the maximum feed speed is 15 ~ 25m / min, and the positioning accuracy is about lo μ M. High precision machining center: the resolution is 0.1 μ m, the maximum feed rate is 15 ~ 100M / min, and the positioning accuracy is about 2 μ M. The precision machining center is more than ± 5 μ m between 2 and lo μ M.

Structure types of high speed machining center

There are two types of high-speed machining center, which are vertical high-speed machining center and horizontal high-speed machining center. Vertical high-speed machining center and vertical machining are basically the same in structure type and processing technology. The only difference is their processing speed. Vertical machining center is not as fast as vertical high-speed machining center, so it has the name of high-speed processing. The structure of horizontal high-speed machining center and horizontal machining center are basically the same, and their processing technology is also type. The only difference is that the processing speed of horizontal high-speed machining center is faster than that of horizontal machining center, so it has the name of high-speed.

Characteristics of vertical high speed machining center

Vertical high-speed machining center refers to the high-speed machining center whose spindle and worktable are set vertically. The common vertical high-speed machining center has three linear coordinate axes, and the fourth axis and the fifth axis can be added to the conventional three-axis vertical high-speed machining center. It only needs to install the CNC rotary table on the workbench or spindle. The vertical high-speed machining center has the characteristics of high cost performance, small floor area, simple structure, convenient installation and measurement of workpiece.

Characteristics of horizontal high speed machining center

Horizontal high-speed machining center is a kind of high-speed machining center whose spindle and worktable are parallel. The common horizontal high-speed machining center in the market has three linear motion coordinate axes and one table rotation axis. This kind of machining center mainly processes box type workpiece. The biggest feature of the horizontal high-speed machining center is that it can process other surfaces except the mounting surface and the top surface by clamping the workpiece at one time. In short, it can process the four peripheral surfaces of the box type workpiece, which is the biggest feature of the horizontal machining center. Its horizontal high-speed machining center has some disadvantages, such as high price, complex structure and large area, which is the worst place of the horizontal high-speed machining center.

Schematic diagram of horizontal high speed machining center

If you need a machining center, you may as well consider mingwan machine tool. Mingwan machine tool adopts advanced Taiwan technology and is committed to building a high-speed machining center with high cost performance and good quality. If you need a high-speed machining center, please call the customer service hotline of mingwan machine tool. We will serve you wholeheartedly