2020 – Page 50 – CNC Machining & Turning, Milling, Metal parts

The reason of tool unbalance in CNC machining

In the process of processing, there will be a variety of problems, these problems are often occurred, may be because we do not operate well in the process of operation, caused by CNC machining is the same, so what are the causes of CNC machining tool imbalance?

The main reason for CNC machining is that the tool design is asymmetric, there are defects in the tool body, and all the adjustment of the tool. The correct balance of the tool can significantly reduce noise and vibration, which increases the tool life and improves the accuracy consistency of parts.

The centrifugal force of CNC machining center is proportional to the square of velocity to amplify the vibration caused by unbalance. The vibration increase of CNC machining center caused by the machining center minimizes the service life of bearing bush, bearing, shaft, spindle and gear.

Before balancing the tool in CNC machining center, it is necessary to measure the unbalance and the angle position of each selected correction plane. These variables are measured on two general types of balancing machines: non rotating or gravity machines are used to measure single plane unbalance, while rotary or centrifuge is used to measure single plane or two plane unbalance.

After measuring the magnitude and angle of the unbalance in the correct plane, you can correct it by adding or removing material from the workpiece. For the components which are not tools, the most widely used material adding method of drilling center is welding counterweight on the components.

Characteristics of CNC machine tools

CNC (numerical control machine tool) is the abbreviation of computer numerical control machine tool. It 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 logically, so that the machine tool can move and process parts. Today we’ll take a look at its characteristics.

The operation and monitoring of CNC machine tools are all completed in this CNC unit, which is the brain of CNC machine tools. Compared with ordinary machine tools, CNC machine tools have the following characteristics:

1、 High machining precision and stable machining quality;

2、 It can carry out multi coordinate linkage and process complex shape parts;

3、 When the machining parts are changed, only the NC program needs to be changed, which can save the production preparation time;

Prospect of CNC processing

CNC is also called computer gong, cncch or CNC machine tool. In fact, it is a kind of name in Hong Kong. Later, it was introduced into the Pearl River Delta of the mainland. It is actually a CNC milling machine. In Guangzhou, Jiangsu, Zhejiang and Shanghai, there are people called “CNC machining center”. General CNC machining usually refers to precision machining, CNC machining lathe, CNC milling machine, CNC boring milling machine, etc. Today we will talk about the prospect of CNC processing industry.

As an industry widely used in the market for mold processing and production, with the development of market economy, the decline of demand and the increase of peer competition pressure, technological breakthrough or price war is urgent.

1、 From the technical reform, the future development center must make a breakthrough from the most basic technology, realize the multi-directional upgrading from the mechanical and operational aspects, and achieve the technical update of the industry. Only with unique technology can we better cope with the future competition.

2、 In terms of service improvement, the competition in the industry is not only in technology, but also in service. Service is the relationship. If the service is done well, customers will continue to choose cooperation. Therefore, in the limited time, we should improve the service in essence.

Automatic processing quality

For the quality of processing, it depends on what factors, including many, may be the processing method, may also depend on the material, these are possible, automatic parts processing is the same, then the quality of automatic parts processing depends on what reason?

The quality of the machine depends on the processing quality of the parts and the assembly quality of the machine. The machining quality of the parts includes the machining accuracy and the surface quality of the parts. The machining accuracy refers to the degree to which the actual geometric parameters of the parts are consistent with the ideal geometric parameters. The difference between them is called machining error. The size of machining error reflects the level of machining accuracy. The larger the error is, the lower the machining accuracy is, the smaller the error is, the higher the machining accuracy is; the main factors affecting the machining accuracy are: dimensional accuracy, the conformity between the actual size of the part after processing and the tolerance zone center of the part size.

The machining error of Automatic Parts reflects the machining accuracy. The larger the error is, the lower the machining accuracy is, the smaller the error is, the higher the machining accuracy is; the main factors affecting the machining accuracy are: dimensional accuracy, the conformity between the actual size of the part after processing and the tolerance zone center of the part size. Compared with the method of producing parts with die casting die, it avoids the uneconomical of opening the die when manufacturing small batch parts, and shortens the production cycle greatly. At the same time, the correct clamping and positioning and reasonable processing technology make the processed parts have high precision and surface finish, which is not achieved by die casting process. Moreover, the density of extruded aluminum profile is higher than that of die casting. In addition, this method is different from the general single part machining production, it can batch produce a bed of parts. If the working table of the machine tool is large enough, the bottom plate can be made larger, and several aluminum materials can be arranged at a time, then the processing efficiency can be further improved and the number of tool changes is relatively reduced. If there are features on the side of the part to be processed, such as a round hole to be drilled, then after the part is cut off on the B side, the fixture shall be manufactured, and the part shall be installed

CNC machining features

It is precisely because of the good characteristics of this processing, people will continue to use, will continue to choose, it is enough to prove that this processing is how good, CNC processing, then CNC machining parts characteristics is what? 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.

CNC processing in Dongguan

Because CNC machining center can finish many kinds of working procedures in a centralized and automatic way, it can avoid man-made operation error, reduce the time of workpiece clamping, measuring and machine tool adjustment, as well as the time of workpiece turnover, handling and storage, and greatly improve the processing efficiency and accuracy, so it has good economic benefits.

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

Hardware processing technology

Hardware equipment, or the application of hardware processing machine tools, in today’s machinery industry, or silicone, or mold, steel, electronic products, other products, after the processing of mechanical equipment, the effect and efficiency are much faster, and reduce the processing pressure of employees. Now hardware manufacturers include a wide range, such as keys, or some metal plates, or etching, or other materials, iron.

What is the expansion effect of hardware processing industry

Spray painting: spray painting is widely used in some relatively large hardware parts. The existence of spray painting can not only make the products not easy to rust, but also produce some other effects, so that the performance of the products is better. It is a step that many hardware parts processing manufacturers will carry out when processing finished products.
Electroplating: electroplating is a relatively common hardware parts processing technology, because the use of this process for the product surface rust resistance performance is very good, can let the product in a long period of time can be normal and stable work, and is widely used in the current hardware products processing.

What is the expansion effect of hardware processing industry

Polishing: polishing is often used in some daily necessities of hardware parts processing technology. Polishing is not only to maintain the appearance of products, but also to make users feel better. Especially for some products which are easy to balloon and burr, polishing is a necessary step. Now China’s hardware industry is developing rapidly, and the continuous development of science and technology is also constantly promoting the improvement of hardware processing technology. I believe that there will be more processing technology to be created in the future, which will bring convenience to human production.

What is the expansion effect of hardware processing industry

First of all, the most important error of secondary positioning and non coincidence is the error of non coincidence. When machining the workpiece on the machine tool, it is necessary to select some geometric elements on the workpiece as the positioning datum during processing. If the selected positioning datum does not coincide with the planning datum, the datum misalignment error will occur. Measurement error: when measuring parts during or after processing, the measurement method, measuring tool precision, workpiece and subjective and objective factors directly affect the measurement accuracy. There are fixture errors and tool errors: mechanical fixture errors: the role of the fixture is to make the workpiece equivalent to the tool and machine tool with the correct orientation, so the geometric errors of the fixture have a great impact on the machining errors. Spindle rotation error refers to the variation of the actual rotation axis of the spindle relative to its uniform rotation axis at each moment, which will directly affect the accurate density of the workpiece. Any tool in the cutting process can not prevent wear, and thus cause the size and shape of the workpiece to change.

The function of CNC machining

Numerical control processing, metal parts processing, or some other mechanical equipment processing, are constantly increasing, and the level of science and technology is also improving, which has improved our processing level and economy. For the development of various industries, the effect is relatively good. Now let’s understand the role of CNC parts processing in Dongguan!

Dongguan CNC parts processing, Dongguan CNC parts processing is important

The hope of linear motor and its driving control skills shows that its function is constantly improved, and its value, achievement and precision are a unity of opposites. The stepping linear motor has a wide range of varieties, and is easy to install and protect. Although its achievement components such as motorized spindle, linear motor, linear rotating guide rail, spindle bearing, and other accessories such as grating ruler and cutter are also valuable The corresponding rise, good reliability, so that the transmission layout of the machine tool presents a change. Through the turntable to change the station, not only the continuous rotary surface on the side of the workpiece can be processed, on the one hand, the horizontal machining center with high density should be selected because the machining center is growing towards the compound. Users often have a lot of questions when purchasing, which can realize nano level node In general, the layout of the tool changer is huge, the obstruction rate is high, and the cost is high. The fairness of the selection scheme should be balanced by the cost performance. The commercialization level is high, and attention should be paid to the speed range of the spindle, so as to achieve more comprehensive results, Horizontal CNC milling machines usually add CNC turntable or universal CNC turntable to realize coordinate processing, such as box type and shell type parts. Based on the principle of five axis machining center, with the development of motor and its drive control skills, for example: DC linear motor, when parts need to complete multi-faceted processing in one clamping process, At the same time with the above two types of machine tools, and can be installed at one time, but the tool change time is short.

Dongguan CNC parts processing, Dongguan CNC parts processing is important

A large number of tooling is reduced, and complex tooling is not needed to process parts with complex shapes. If you want to change the shape and size of parts, you only need to modify the part processing program, which is suitable for the development and modification of new products.
With the development of CNC lathe technology, compound machining technology is becoming more and more mature, including milling turning compound, turning milling compound, turning boring drilling gear machining, turning grinding compound, forming compound processing, special compound machining, etc., the precision and efficiency of compound machining are greatly improved.
CNC system has been more intelligent performance. The functions of automatic adjustment of interference and anti-collision, automatic exit of workpiece from safety zone after power failure, power-off protection function, machining parts detection and automatic compensation learning function, intelligent parameter selection function of high-precision machining parts, and automatic elimination of machine tool vibration in the processing process have entered the practical stage, and the function and quality of the machine tool have been improved by intellectualization.

The importance of CNC machining

In the era of science and technology, all the products we need are processed by mechanical equipment, which is fast, efficient and of good quality. Moreover, it reduces the processing pressure of employees, which is recognized by many processing manufacturers. For example, the processing of CNC requires professional staff with good technology, which can also avoid more problems and deal with details Better, this shows the importance of CNC processing technology!

Dongguan CNC processing, Dongguan CNC processing is important

Due to the numerical control of CNC machine tools in the process of mechanical mold processing and manufacturing, most of the operations are replaced by manual operation by digital programming, so the error of manual operation is relatively avoided. However, it does not mean that automation can completely replace manual operation. Due to the particularity of mechanical mold that will not be repeatedly opened, in order to ensure the accuracy of parts and product quality, and avoid invalid input, the setting and editing program of instruction code must be repeatedly confirmed by manual, and even need to carry out manual activities to deal with some parts structure before processing. In the process of application of CNC machine tools, it can effectively upgrade and improve the NC machining and manufacturing technology of mechanical mold, and at the same time, it can greatly improve the value of products by combining manual and numerical control. Under the premise of mold design, the use of numerical control data technology for repeated mapping and calculation of drawings should also be reasonable application of a new generation of closed-loop compensation technology to make the machining process of mechanical mold more accurate.

Dongguan CNC processing, Dongguan CNC processing is important

Application of NC EDM Technology: as the leading technology of mechanical mold manufacturing technology, CNC EDM technology mainly uses the positive and negative charge orientation of pulse power supply, tool electrode and insulating pad to process the hole and cavity of workpiece. EDM technology includes forming, cutting, grinding and so on. As the leading technology of mechanical mold processing, the economic cost of EDM technology is relatively low, and the stability performance is guaranteed. Nowadays, with the development of EDM technology to the CNC stage, the staff can get a relatively accurate control of electrolyte and electrical parameters. The shape and movement of tool electrode are regulated by numerical control, so all kinds of complex surface can be machined by EDM technology.

Machining heat treatment process

The structure and shape of machine parts are composed of some basic geometric surfaces. The machining process of machine parts is the process of obtaining these geometric surfaces. Different processing methods can be selected for the same surface, but the processing quality, processing time and cost obtained by each processing method are different. The task of engineering and technical personnel is to select the most appropriate processing method according to the specific processing conditions, so as to ensure that the machine parts meeting the requirements of the drawings can be processed. When selecting the processing method, the final processing method is always selected first according to the technical requirements of the main surface of the part and the specific conditions of the factory, and then the processing methods of the relevant previous processes of the surface are selected one by one. The machining surface of parts has certain processing requirements. Generally, it is impossible to achieve the requirements through one processing, but it can be achieved gradually through multiple processing (i.e. multiple processes).

Dongguan machining, Dongguan machining market expansion

Arrangement of heat treatment process and surface treatment process!

The heat treatment processes arranged to improve the cutting performance of workpiece materials, such as annealing, normalizing, quenching and tempering, should be carried out before cutting.

In order to eliminate the internal stress of the workpiece, the heat treatment process, such as artificial aging and annealing, should be arranged after the rough machining stage.

In order to improve the mechanical properties of workpiece materials, heat treatment processes, such as quenching, carburizing and quenching, are generally arranged between semi finishing and finishing.

In order to improve the wear resistance and corrosion resistance of the workpiece surface, the heat treatment process arranged for the purpose of decoration, such as chromium plating, zinc plating, blue plating, etc., are generally arranged in the final stage of the process.

Future development trend of hardware processing

The processing of metal equipment is not only the quality required by customers, but also the needs of the times. Why do you say that? The general quality is not guaranteed. Do you think that anyone else will buy your products? In the long run, your manufacturers will lose money. If we continue to develop in this way, we will not even get the cost. Therefore, it is Zui to guarantee the customer’s return purchase rate in the early stage of hardware processing important.

How about the hardware processing market

Since entering the 21st century, China is gradually becoming an international hardware processing and exporting country, with huge market and consumption potential. China’s self-developed various kinds of daily hardware products rank in the forefront of the world, and have achieved good economic benefits and reputation. The development of hardware processing market has thousands of years of history, with the continuous evolution of society, its development is also changing with each passing day. All kinds of advanced products are inseparable from the design and development of hardware, and these just confirm the changes of social development.

How about the hardware processing market

With the deepening of competition, the profit space of metal stamping industry chain in each stage is compressed, and the space of price reduction is decreasing day by day. More and more enterprises realize that only relying on price competition can not establish the core competitiveness and is not the direction of long-term development, so they try to explore a new development path. Many hardware enterprises have increased their investment in technology, developed new products with high-tech content, took product differentiation as a long-term plan for enterprise development, sought new market demand, established new economic growth point, and realized sustainable development of enterprises. The next few years will be a period of high-speed shock in the metal stamping industry. The direct consequence of this high-speed shock is the expansion of the polarization trend of the current metal stamping industry. It is expected that in the next few years, there are not so many metal stamping enterprises that can survive in the market. But the high-speed shock of the metal stamping industry will bring great opportunities, and the result of the shock will make the market operation more rational.