Category Archive CNC Technology

Generally speaking, only living objects will pay more attention to the impact of the environment, did not expect to say that mechanical installation also has requirements on the environment. CNC machining center’s powerful processing ability can bring very high work efficiency for enterprises. The premise is that the installation environment is good, so today we’ll learn about the requirements for the installation environment?

1. Location requirements

It should be far away from the vibration source and direct sunlight. If there is a seismic source nearby, an earthquake proof trench should be set up.

1. Temperature and humidity

The optimal processing temperature of CNC machining center is below 30 ℃. If the ambient temperature and humidity are too high, the service life of the control system components may be reduced. If the ambient humidity is too high, it may lead to the short circuit and fault of the integrated circuit board.

1. Voltage and current control

There are many processing equipment in the workshop, which will cause excessive fluctuation of the power grid. We need to control the voltage and current within the allowable range of the machining center and keep it stable, otherwise the work of the system may be affected. The power supply shall be 380V ± 10%, three-phase AC

There are many reasons for the failure of CNC machining. There are not only one but also many kinds. It may be due to the operation error in the processing process or the poor selection of materials. These are one of the reasons for the failure, and the same is true for CNC processing. What are the reasons for the failure of CNC processing?

1. The main reason of material failure is improper material selection. The most common is that the designers of CNC machining only make decisions according to the conventional performance indicators of materials, and the defects of materials themselves are also the reasons.
2. When installing and using the failed parts, if they are too loose, too tight, fixed, poor alignment and improper operation, they may lead to the use failure.
3. In CNC machining, due to the poor control of processing technology, various defects will be formed and lead to failure. For example, improper control of heat treatment process leads to overheating, lack of tempering, decarburization, etc. Overheating or over burning. Too deep, too low degree of grinding will lead to poor machining process.
4. The first reason for the design is that the structure and shape of the design are unreasonable, which leads to the failure of the parts. For example, there are obvious stress concentration sources in the high stress area of the parts. The other is the wrong estimation of the working conditions of the parts, such as the lack of estimation of possible overload in the work, so that the bearing capacity of the designed parts can not be reduced

ABS, PC, POM, PP, acrylic (PMMA), nylon, bakelite, aluminum alloy, zinc alloy, low carbon steel, copper, stainless steel, Teflon, PBT, PPS, PEET, polyurethane foam, etc.

CNC, namely numerical control machine tool, is an automatic machine tool equipped with program control system. The control system can process and decode the program with control code or other symbol instructions and regulations logically, express it with coded numbers, and input it into CNC device through information carrier. After calculation and processing, the CNC device sends out various control information to control the behavior of the machine tool, and automatically processes the parts according to the form and size required by the drawing.

Engraving and milling machine is a kind of CNC machine tool. Generally speaking, engraving and milling machine is a kind of CNC milling machine with small cutting tools, high power and high-speed spindle motor. The advantage of engraving machine is carving. If the hardness of processing material is relatively large, it will also appear to be inadequate. So is CNC machining center or engraving and milling machine good? Let’s get to know it together!

1. CNC machining center and engraving and milling machine are commonly used mechanical equipment. There are similarities and differences between them. It is difficult to have an accurate answer if it is hard to say whether CNC machining center is good or engraving and milling machine is good. There is no way to compare different uses. Only in some small aspects to compare the advantages and disadvantages of the two.
2. The rigidity requirement of the non moving part of CNC machining center is very good, and the rigidity of the moving part is also very good, which can be used for heavy cutting. The rigidity of the non moving part of the engraving and milling machine is better than that of the CNC machining center due to the flexible requirements of the engraving and milling machine.
3. Is the spindle speed faster than CNC machining center or engraving and milling machine

The spindle speed of CNC machining center is generally 0-8000 rpm. Although high-speed machining center can achieve high speed, overall speaking, engraving and milling machine has higher requirements on rotation speed. Engraving and milling machine requires high-speed CNC system, and the spindle speed is generally between 3000-30000rpm. The spindle speed of some specific engraving and milling machines is higher than that of high-speed machining center.

1. The machining range of CNC machining center and engraving and milling machine is different

CNC machining center is used to complete the equipment processing of large milling amount of workpieces, which can be re cut. Engraving and milling machine is generally used for small cutting or soft metal processing equipment, commonly used for lettering

It is because of the good characteristics of this processing, people will continue to use, will continue to choose, it is enough to prove how good this processing is, it is Dongguan CNC processing, so what are the characteristics of Dongguan CNC machining parts? What advantages can be embodied?

The features of CNC machining parts are as follows: after the parts are clamped once, the CNC system can control the machine tool to automatically select and change the tool according to different working procedures; it can automatically change the spindle speed, feed rate and the movement track of the cutter relative to the workpiece and other auxiliary functions, and automatically drill, spot face, ream, bore, tap thread on each machining surface of the workpiece Milling and other multi process processing.

The CNC machining center can greatly reduce the machining time, machining accuracy and machining efficiency.

CNC machining center can be divided into vertical machining center and horizontal machining center according to the position of spindle in space.

We pay attention to efficiency and quality when we work, so we need some skills to achieve these two points. It is also a very good thing to learn to use some skills when we are processing. In the processing process of CNC machining center, it is very important to avoid collision of CNC machining center when programming and operating processing. Because the price is more expensive. Let’s take a look at what techniques can be used to avoid collisions?

1. Using computer simulation system

With the development of numerical control system, simulation technology is more and more perfect. Therefore, it can be used in the preliminary inspection procedure to observe the movement of the tool to determine if there is a possibility of collision.

1. Using the analog display function of CNC machining center

Generally, more advanced CNC machining centers have graphic display function. When the program is input, the graphic simulation display function can be called to observe the motion track of the tool in detail, so as to check whether the tool may collide with the workpiece or fixture

1. Using the empty running function of CNC machining center

The correctness of the tool path can be checked by using the idle running function of CNC machining center. When the program is input into CNC machining center, the tool or workpiece can be installed, and then press the “empty run” button. At this time, the spindle does not rotate, and the worktable automatically runs according to the program path. At this time, it can be found 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 tool cannot be installed; when the cutter is installed, the workpiece cannot be loaded, otherwise there will be collision.

1. Using the locking function of CNC machining center

General CNC machining center has locking function (full lock or single axis lock). When the program is input, the z-axis is locked, and the collision can be judged by the coordinate value of z-axis. The application of this function should avoid the operation of tool change, otherwise the program can not pass.

1. The setting of coordinate system and cutter compensation must be correct

When starting CNC machining center, the reference point of CNC machining center must be set. CNC machining center working coordinate system should be consistent with the programming, especially the Z axis direction. If there is an error, the possibility of milling cutter and workpiece collision is very large. In addition, the setting of tool length compensation must be correct, otherwise, it is either empty machining or collision.

The direct meaning is to say that it is computer digital control. It is a kind of processing technology commonly used in the manufacturing industry at present. It can also be said that it is the symbol of the current manufacturing industry. CNC machining center is mainly used to finish multi axis linkage processing easily. For example, the processing of curved surface is almost impossible if it is separated from CNC and processed by ordinary machine tools.

CNC machining center focuses on the processing of some careful spare parts, mainly used in automobile and motorcycle accessories, lighting lamps, automatic robots, mechanical hardware, aerospace military industry, electronic instruments, medical equipment, 3C digital, household appliances, communication mobile phone and other industries.

The materials processed by CNC machining center usually include ABS, PC, PE, POM, PP, PMMA, nylon, bakelite, silicone rubber, aluminum alloy, zinc alloy, magnesium alloy, titanium alloy, steel, copper, stainless steel, sheet metal and other raw materials.

The order process of CNC machining center is: 1. Order plan customization; 2. Disassembly and programming; 3. Material preparation; 4. CNC processing; 5. QC inspection; 6. Surface treatment; 7. QC quality inspection; 8. Delivery of molding products

In the process of processing, every step is very important. If one step is not in place due to carelessness in the process of processing, it is likely to directly affect the final effect of the product. Therefore, in the process of work, the operator must maintain a full state of mind, which is not only for their own good, but also has good results for the product, so if the CNC processing technology is not properly arranged, what problems will occur?

1. CNC machining process is too scattered

The reason for this problem lies in the fear of complexity (refers to the preparation time), simple programming, simple operation and processing, easy adjustment of tool setting by using a knife, and being used to ordinary processing. As a result, the product quality (position tolerance) is not easy to guarantee and the production efficiency can not be brought into full play. Therefore, CNC processing personnel and operators should be fully familiar with CNC machining knowledge, try more to master the relevant knowledge, as far as possible to use the method of process concentration for processing, more use, will naturally reflect its advantages. After two sets of equipment are used, the processing efficiency is greatly improved and the equipment quality is greatly improved.

1. CNC machining sequence is unreasonable

Some CNC processing operators consider some problems in preparation, and often arrange the processing sequence irrationally. NC machining is usually carried out according to the requirements of general machining process planning, such as coarse to fine (tool change), inside to outside, reasonable cutting parameters, so that the quality and efficiency can be improved

Large CNC lathe is a kind of high precision and high efficiency automatic machine tool. It adopts the method of machining parts and cutter displacement controlled by computer programming. Automatic lathe processing is an automatic machine tool with cam cutter. The machining is completely controlled by the cam. So what are the advantages of large CNC lathe and automatic lathe?

1。 The number of molds is greatly reduced, and complex molds are not needed to process parts with complex shapes. If you want to change the shape and size of a part, you only need to modify the part processing.

2。 The machining quality is stable, the machining precision is high and the repetition precision is high.

3。 Under the condition of multi variety and small batch production, the production efficiency is high, and the time of production preparation, machine tool adjustment and process inspection is reduced. And reduce the cutting time because the number of cuts is used.

4。 It can process complex profiles which are difficult to be processed by traditional processing methods, and even some parts that cannot be observed.

Advantages of automatic lathe processing:

1。 The processing speed is fast. In the process of automatic lathe processing, the tool carrier moves and processes at the same time, so that the processing speed of automatic lathe is 4-6 times faster than that of numerical control lathe.

2。 The processing cost is low. The price of automatic lathe equipment is lower than that of numerical control lathe, the processing speed is fast, and the processing cost is lower than that of numerical control lathe.

What is the significance of CNC processing of aluminum alloy profiles? The popular point is that CNC machining is the use of computer to program processing programs, such as cutting, tapping, tapping, counterbore, etc., basically relying on numerical control operation. Aluminum alloy CNC processing of alloy profiles can reduce product damage, so what are the advantages and disadvantages of CNC processing of aluminum alloy? Let’s take a look at it

The products with good use are easy to use and difficult to use. The advantage of CNC machining is that it can reduce the processing times. As long as the program is modified, complex aluminum profiles can be processed without complex tools. The processed aluminum profile has high precision and stable quality. Whether it is the traditional aluminum profile, the complex cross-section of different materials, or the parts with poor machining, CNC machining is operable.

Disadvantages of NC machining: processing equipment is more expensive, and the quality requirements of operators are relatively high.