cncmachining

1. Preparation

The CNC turning and milling composite processing manufacturer introduced the process requirements of typical parts and the batch of processed workpieces. The function that the CNC lathe should have is to make preparations and the prerequisites for the reasonable selection of CNC lathes. Meet the process requirements of typical parts

The process requirements of typical parts are mainly the structural size, processing range and accuracy requirements of the parts. According to the accuracy requirements, that is, the dimensional accuracy, positioning accuracy and surface roughness of the workpiece, the control accuracy of the CNC lathe is selected.

Choose based on reliability. Reliability is a guarantee for improving product quality and production efficiency. The reliability of a CNC machine tool means that the machine tool runs stably for a long time without failure when it performs its functions under specified conditions. That is, the mean time between failures is long, even if there is a failure, it can be restored in a short time and put into use again. Choose machine tools with reasonable structure, well-manufactured, and mass-produced machines. Generally, the more users, the higher the reliability of the CNC system.

2. Purchase of machine tool accessories and tools

According to the analysis of CNC turning-milling composite processing manufacturers, the machine tool accessories, spare parts and their supply capacity, and cutting tools are very important to the CNC machining and turning centers that have been put into production. When choosing a machine tool, carefully consider the compatibility of tools and accessories.

3. Focus on the identity of the control system

　Manufacturers generally choose products from the same manufacturer, and should at least purchase control systems from the same manufacturer, which brings great convenience to the maintenance work. Teaching units require students to be knowledgeable and knowledgeable, so it is a wise choice to choose different systems and equip them with various simulation software.

4. Choose according to the performance-price ratio

　Introduced by CNC turning-milling composite machining manufacturers, to ensure that the functions and accuracy are not idle, not wasted, and do not choose functions that are not related to your needs.

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Vibration of the knife in the CNC turning process is very common, and it is generally manifested as: uneven and rough surface of the part, accompanied by harsh sounds, unstable dimensions, etc…

In order to better solve these common problems, we have to understand the source of this problem: resonance point

On Wikipedia, it is explained like this:

The resonance point (acoustics is called resonance) refers to the situation when a physical system vibrates with a greater amplitude than other frequencies at a specific frequency; these specific frequencies are called resonance frequencies, which are very small. Periodic driving force can CNC machining huge vibrations because the system stores vibration energy as damping. There is a very small chance that the resonance frequency is approximately equal to the natural frequency or natural frequency of the system, which is the frequency during free oscillation.

In a normal cutting environment, the rotation speed of the spindle remains stable, and the frequency and amplitude of vibration are also maintained within an acceptable range.

As the vibration frequency increases, the vibration amplitude will increase accordingly.

The most obvious example is:

In some intermittent CNC turning processing environments, as the spindle speed increases, not only will it not increase the surface roughness of the workpiece, but on the contrary, it will make the surface rougher.

For example, increasing the speed is equivalent to increasing the frequency of vibration; a rough surface means that when the tool touches the workpiece, the contact point on the circumference has a slight change, and it also shows that the amplitude of the vibration has been amplified.

This does not mean that increasing the frequency of the vibration will definitely increase the amplitude of the vibration. Only this result will be more obvious when the resonance is excited.

Essentially, in order to ensure the parts have a stable roughness, it is necessary to maintain a stable vibration amplitude. Keep the generated vibration away from the resonance frequency and no longer increase the amplitude of the vibration.

If forced to shorten the time for resonance to occur, it will also have a positive effect on controlling the amplitude of vibration. The unique function of Haas lathe, SSV (Spindle Speed ​​Floating), uses the changing speed to shorten the time of resonance, thereby achieving the purpose of improving roughness.

Material cutting is currently a subdivision of laser applications in my country, most of which are laser cutting applications for medium and high-power metal materials. Mainly include stainless steel, carbon steel, copper, aluminum and other daily major metals, of which stainless steel and carbon steel are mostly.

1. The cutting board turns to laser cutting tube

The development of domestic laser metal cutting is in full swing. From YAG lasers, CO2 lasers to fiber lasers, cutting equipment from 500 watts to 20,000 watts, just over ten years. Nowadays, the development of domestic laser cutting equipment is relatively mature. From the power point of view, it can basically meet most of the application requirements. There are a large number of domestic companies deploying metal plate flat cutting equipment, industry competition has become fierce, and even a market pattern of price competition has been formed.

Two-dimensional cutting board has entered a low-profit era, forcing many cnc turning china board equipment companies to find another way out, looking for new growth points, new application scenarios and greater profit margins. At this time, the wave of metal laser cutting has just spread to the field of metal tube cutting.

In fact, laser tube cutting is not a new technology. Many domestic companies have launched similar products many years ago, but at that time there were fewer applications for laser tube cutting, and the price of the equipment was relatively high, which was not widely promoted. In the past, CO2 laser cutting was used, but now it is fiber cnc milling china. Many companies have been hindered in the growth of flatbed cutting machines, competition has intensified, and they have entered the era of meager profit. They have turned to tube cutting machines. There are still certain profits, and companies are willing to do it. Even many companies are constantly promoting new technologies and functions for pipe cutting, including integrated pipe cutting machines for plate and tube, three-chuck pipe cutting machines, automatic feeding pipe picking machines, pipe cutting machines, etc.

2. Steel pipes are used in all walks of life

Metal pipes are widely used in different industries. The length of the general pipeline from the factory is usually 10 meters or even 20 meters. After entering different industries, due to different application scenarios, parts of different shapes and sizes need to be processed to meet the needs of different industries. The processing of metal pipes mainly includes three processes: cutting, bending and welding. In practical applications, the requirements for pipe cutting are very large.

Steel pipes generally include surface-treated ordinary steel pipes and stainless steel pipes.

Steel pipes are widely used in water supply and drainage, liquid and gas transportation projects. Now, most of the cold water supply system is made of plastic pipes. Steel pipes are widely used in electric power, engineering and construction steel structures, home construction, door and window guardrails, automobiles/bicycles/motorcycles, agricultural machinery, sports facilities, etc. In recent years, the application of stainless steel pipes in bathrooms and furniture has received particular attention.

3. The advantages of laser tube cutting

In the past, traditional stainless steel medical machining mostly used saw blade cutting, from manual to semi-automatic, and then to fully automatic, saw blade cutting technology has reached its peak, and the cutting efficiency cannot be improved. At this time, laser tube cutting technology began to enter the tube industry, which is very suitable for cutting various metal tubes. It has the characteristics of high degree of automation, high efficiency and high output. For pipes of different materials, there is no need to replace the corresponding saw blade. In any case, this is a "one-time cutting" with no intermediate downtime, which is very suitable for mass production.

4. Traditional pipe saw blade

The emergence of high speed machining pipe processing has brought a subversive change to the original metal pipe industry cutting process. Laser cutting has quickly replaced many traditional inefficient mechanical cutting. Nowadays, laser pipe cutting machines continue to add new functions, such as automatic feeding, clamping, rotation, and grooving. Suitable for round tube, square tube and flat tube. Laser cutting can almost meet all the requirements of pipe cutting.

In terms of efficiency, according to a manufacturer of cutting steel pipes, it only takes 15 seconds to cut a stainless steel pipe with a saw blade. Now, laser cutting is completed in less than 2 seconds, and the efficiency has increased by nearly 10 times. The important thing is that a saw blade worth several hundred or even several hundred yuan will wear out and become scrapped after 1,000 cuts and need to be replaced. However, laser cutting can almost be regarded as achieving aluminum parts, which can save a lot of costs.

For China's hundreds of billions of metal tube market, laser cutting tube technology has only just started a few years, and there is a great opportunity for traditional replacement in the future.

Welding is defined as the manufacturing process and technology of joining metals or other thermoplastic materials (such as plastics) by heating, high temperature, or high pressure. In fact, in our impression, the object of welding is generally metal. How to weld wood that is afraid of high temperatures?

Today, laser cutting manufacturers will take you to find out.

1. What is friction welding

Friction welding is a method that uses the end faces of the workpiece to move and rub each other to make the end faces reach the thermoplastic state, and then quickly upset to complete the welding. It is a hot spot in welding research in recent years.

Friction welding technology does not require the introduction of external heat sources, which can greatly simplify the process flow, reduce auxiliary processing equipment, and effectively reduce production costs and environmental pollution. At the same time, friction copper machining technology has the advantages of stable welding joint quality, high welding efficiency, easy automation, and low energy consumption.

2. How to carry out friction welding of wood

Friction welding of wood is a kind of linear reciprocating or rotating friction between two wood components. The heat generated by friction can melt the high-molecular polymer in the wood, and the fibers in the wood are entangled with each other during the movement of the parts. When the movement stops, the entangled wood fibers are wrapped by the cooling melt layer to form a welded joint to connect the wood components together.

3. Four sections of wood brass machining

Friction welding of wood can be divided into four stages

①In the initial stage, the two closely contacting wooden components begin to move back and forth, and the surface of the components generates heat through friction;

②Transition stage: As the friction progresses, the temperature of the friction interface increases, and the material in the friction area begins to soften and melt;

③In the stable stage, the frictional heat of the welding interface tends to be stable, and the melt layer begins to flow plastically. Under pressure, the high-temperature plastic-wood polymer at the friction interface is continuously squeezed to form a flash;

④Cooling stage: After the friction stops, the polymer material cools and solidifies and connects into a whole.

4. What are the factors that affect wood welding?

First of all, the properties of wood, such as wood type, moisture content, density, ring width and other factors will have a certain impact on the friction welding of wood. Secondly, different welding methods have different influencing factors due to their respective processing characteristics. Friction cnc turning china can be divided into linear vibration friction welding and high-speed rotary friction welding. Linear vibration friction welding is affected by the welding process parameters (welding pressure frequency, welding time, welding amplitude); high-speed rotary friction welding is affected by the rotation speed, insertion speed and circle of the round bar tenon. The diameter of the round bar tenon and the diameter of the pre-drilled hole The difference affects the welding parameters.