2020 – Page 59 – CNC Machining & Turning, Milling, Metal parts

What is the market situation of aluminum shell mold?

The material of the aluminum shell is an aluminum alloy material, which becomes a kind of shell through manufacturing and processing. This device is widely used in the society, and is also involved in the industry. It is mainly used as shell to play a good protective role, or panel, bracket, etc., aluminum shell has a very good protection effect, which has won the favor of consumers.

According to the different uses of aluminum shell, there will be great differences in the design work. Generally speaking, in order to select the appropriate shell, it is necessary to select a professional enterprise for design work.

Aluminum shell is widely used in the society, which makes the sales of this product in the market relatively high. There are many enterprises engaged in the shell production. When customers purchase aluminum shell, they need to refer to certain standards, so as to make the purchase work more smoothly. For the purchase of aluminum shell, customers can choose according to the quality of the product, the quality will have a great impact on its service time. At the same time, good quality products in use, the effect is relatively good, can meet the needs of users.

Aluminum shell mold weight is very light, but also has the properties of aluminum alloy material, with good corrosion resistance. At present, the sales momentum of this kind of mold in the market is relatively good. At the same time, it is also good at making complex parts. It can produce appropriate products according to the needs of customers, and at the same time, it is more favorable in price.

The development of aluminum shell in the market mainly depends on the market demand. China’s aluminum alloy mold started relatively late, so that the market demand for it is relatively large, while its cost is relatively low, better promote the development of mold in the market.

Causes and solutions of surface damage of aluminum shell

Reasons for surface damage of aluminum shell:

① There are impurities or segregation on the surface of ingot. When there are a lot of segregation floating objects on the surface of the ingot, but the ingot is not homogenized or the homogenization effect is not good, there are a certain number of hard metal particles in the ingot. When the metal flows through the working belt during extrusion, these segregation floating objects or hard metal particles adhere to the surface of the working belt or cause damage to the working belt, and finally cause Scratch on the surface of the profile;

② There are impurities in the mold cavity or the working belt, and the hardness of the die working belt is low, so that the surface of the working belt is injured and the profile is scratched during extrusion;

③ There are bare metal or graphite strip on the discharge track or swing bed, and there are hard inclusions in it, which will scratch the profile surface when it contacts with the profile;

④ When the fork bar transfers the profile from the discharge track to the swing bed, the profile is damaged due to the high speed;

Solution to surface damage of aluminum shell:

① Strengthen the quality control of ingot;

② Improve the quality of die repair, regular nitriding and strictly implement the nitriding process;

③ The soft felt is used to isolate the profile from the assistive device to minimize the contact damage between the profile and the accessory;

④ In production, handle with care and avoid dragging or turning the profile at will.

The factors influencing the price change of aluminum profile shell mainly include the following aspects:

1、 Due to the influence of alumina supply, the cost of aluminum melting accounts for 28% – 34% of the production cost of aluminum ingot. Due to the high concentration of the international alumina market, most of the world’s alumina (80% – 90%) are sold through long-term contracts, so there is very little alumina available for sale in the spot market. Take China as an example. Before 1997, China’s alumina gap was mainly purchased from the international spot market without long-term contracts. In 1997, China Nonferrous Metals and Alcoa signed a 30-year long-term supply contract, with 400000 tons per year. The price was set according to a certain proportion of LME’s original aluminum price. In recent years, with the continuous expansion of China’s electrolytic aluminum production scale, the domestic demand for alumina is also growing. At present, about two-thirds of the imported alumina needs to be purchased from the spot market. According to statistics, in 2004, China imported 5.87 million tons of alumina, a year-on-year increase of 4.8%. The average import price was 340 US dollars (the cash cost of foreign alumina production was less than 120 US dollars). According to simple calculation, direct import of alumina in 2004 alone paid more for foreign alumina suppliers The cost is as high as several billion yuan. The rising price of alumina makes the production cost of electrolytic aluminum production enterprises rise sharply, and the economic benefits decline sharply, and most enterprises fall into meager profits or losses.

2、 When the relationship between supply and demand is in a temporary balance, the market price of the commodity will fluctuate in a narrow range; when the relationship between supply and demand is unbalanced, the price will fluctuate greatly. In the aluminum futures market, investors can pay attention to an indicator reflecting the change of aluminum supply and demand – inventory. The inventory of aluminum profile shell is divided into report inventory and non report inventory. The reported inventory is also known as “explicit inventory”, which is the inventory quantity of aluminum in its designated delivery warehouse published by Futures Exchange on a regular basis. The non reported inventory mainly refers to the amount of aluminum held by producers, traders and consumers worldwide. Since there is no special agency for statistics and release of these inventories, these inventories are also known as “hidden inventory”.

3、 At present, the average power consumption per ton of aluminum in aluminum plants at home and abroad is controlled below 15000 kwh / T. The experience of aluminum ingot production in western countries shows that when the electricity charge exceeds 30% of the cost of aluminum production, it is considered as dangerous production.

4、 The influence of economic situation has become an important variety of non-ferrous metals, especially in developed countries or regions, aluminum consumption has been highly related to economic development. When a country or region’s economy develops rapidly, aluminum consumption will also increase synchronously. Similarly, the economic recession will lead to the decline of aluminum consumption in some industries, and then lead to the fluctuation of aluminum price. In addition, the price fluctuation of some metals related to aluminum, the fluctuation of international oil price, and the changes of industrial policies in various countries will have an impact on aluminum price.

5、 The influence of import and export tariff and international exchange rate, the price and settlement of international aluminum 6 trade are generally in US dollars. In recent years, the trend of US dollar has an obvious impact on aluminum price. The influence of import and export tariff on the price of aluminum profile shell is particularly prominent in China.

6、 The influence of the improvement and innovation of aluminum profile shell production process on the aluminum price, the rapid application of computer technology in the aluminum electrolysis industry, led to the in-depth study of the physical field in the electrolysis process and the establishment of the relevant mathematical model, so that the design of the electrolytic cell is more reasonable and the cell capacity is greatly increased

What is the processing technology of aluminum alloy shell?

What is the processing technology of aluminum alloy shell? The following is a brief introduction:

1. Hydroforming technology

In recent years, high pressure forming is a new technology in the world. According to their structural characteristics, various connectors can be formed at one time by internal high pressure forming method, or profiles can be made by general extrusion method, and then the tube blank can be pressed into the die cavity by internal pressure and axial force feeding.

Because of its excellent formability and large design freedom, one hydroforming part can replace the one formed by welding several parts, so it can avoid the distortion and deformation caused by welding, and has high dimensional accuracy and mechanical properties. Its main advantages are: reducing weight and saving materials.

2. Precision die casting technology

The connecting parts of aluminum alloy body frame structure are mostly formed by casting, and some advanced high-precision casting methods, such as semi-solid die-casting, are mainly used. At present, there are two forming processes in semi-solid die casting: rheological forming and thixoforming. In the former, the liquid metal is fed into the specially designed injection molding machine barrel, and the screw device is applied to shear to cool it into semi-solid slurry, and then die-casting is carried out. In the latter, the solid metal particles or chips are fed into the screw injection forming machine, and the metal particles are transformed into slurry under the condition of heating and shearing, and then die-casting is formed.

At present, the semi-solid metal casting used in industry at home and abroad mainly refers to thixotropic casting, which is widely used in body frame structure. Thixotropic casting, as a precision forming method, has high strength after forming and can realize one-time forming of complex shapes. It can be used to mass produce all kinds of parts without cutting or little cutting, and reduce the number of parts.

What should be paid attention to when choosing aluminum profiles?

What should be paid attention to when choosing aluminum profiles? The following is a brief introduction:

1. Check the product factory certificate, pay attention to the date of production, specifications, technical conditions, enterprise name and production license number.

2. Carefully observe the surface condition of the product. The product should have bright color and good luster. There should be no obvious scratch, bubble and other defects on the surface.

3. Pay attention to the wall thickness of the products. The thickness of the door and window materials should not be less than 1.2mm.

4. Pay attention to the thickness of the product surface coating. The film thickness of anodic oxidation product is not less than 10 μ m, the film thickness of electrophoretic coating product is not less than 17 μ m, the coating thickness of powder spraying is not more than 40-120 μ m, and the coating thickness of fluorocarbon paint spraying product should be more than the second coating, not less than 30 μ M.

5. The users in coastal areas should choose electrophoretic coating profiles, powder spraying profiles or fluorocarbon spraying profiles with good corrosion resistance.

6. During routine maintenance, brush and other hard objects should not be used as cleaning tools. Soft cotton yarn and cotton cloth should be selected.

7. Water, detergent and soap can be used for cleaning, but no other organic matter can be used.

What does the enterprise need to make to comply with the precision CNC parts processing

In order to meet the needs of various enterprises, Shenzhen shengyuanda focuses on precision CNC parts processing, realizing the batch production of precision CNC parts processing for various enterprises. As a manufacturer of precision CNC parts for many years, shengyuanda is an all-round service company integrating R & D, production and sales.

It is necessary to do a good job in the machining of precision CNC parts, including technical requirements, personnel requirements, enterprise management and operation mode, whether innovation, whether to adapt to the fierce competition and other elements.

Precision CNC parts processing

In order to comply with the development of the times and the needs of customers, Shenzhen shengyuanda Hardware Products Co., Ltd. actively develops new technologies and strengthens reform and innovation. It also adopts foreign advanced technology and equipment, introduces new thinking marketing mode, and strives to make diversified products to meet the market demand. The company’s precision CNC parts processing is a scientific production line workshop, rigorous production process standards, to create more satisfactory CNC precision machining parts!

What does the enterprise need to make to comply with the precision CNC parts processing?

1、 Need to enhance the strength of the company, with updated technology and management philosophy.

2、 To scientific production, manufacturing more precise instruments for precision CNC parts processing, improve the production equipment, regular maintenance, to practice to find problems, and then improve and innovate. Reference, drilling machine, engraving machine, laser machine, and other advanced equipment for production.

3、 The quality of production should be passed and all processes should be strictly controlled. Strictly control the operation procedures at all levels to ensure the production of high-quality goods, make good use of professional technical personnel and equipment, complete various tasks and implement standards.

Do a good job in service demand, pre-sale and after-sales service, do a good job of tracking between customers and enterprises, any problems need to be communicated and coordinated by both sides, the company can provide better after-sales service guarantee, convenient for customers, without adding any trouble, which also reflects the urban operation philosophy.

CNC manufacturers talk about the matters needing attention in CNC aluminum processing

Some customers often ask what problems should be paid attention to when processing CNC aluminum parts, which is very familiar to Shenzhen shengyuanda Hardware Products Co., Ltd., which has rich experience. What is the specific content?

As we all know, aluminum alloy beam, frame aluminum profile and frame aluminum profile of general equipment need deep processing before they can be put into use. This process needs to go through sawing, drilling, tapping, milling and so on. Customers can choose machines according to the precision of aluminum parts and aluminum alloys.

Let’s learn about CNC machining

1. The speed of white steel knife should not be too fast. When the workpiece is too high, it should be sliced with different length of knife.

2. When taking wcut, if you can take finish, don’t take rough. When the shape of the light knife, first roughing, then polishing, when the workpiece is too high, first smooth the edge, then light the bottom.

3. After roughening with a big knife, use a small knife to remove the remaining material to ensure that the allowance is consistent. The plane should be processed with flat bottom cutter and less ball cutter, so as to reduce the processing time.

CNC aluminum parts processing

4. Set tolerance reasonably to balance machining accuracy and computer calculation time. The tolerance is set to 1 / 5 of the allowance for roughening and 0.01 for smooth knife.

5. The four corners of the calibration plane should be smooth. Try to take simple knife path, such as shape, groove, single side, less walking around the height. Do more procedures to reduce the time of empty knife. Think more and reduce the chance of making mistakes. Make more auxiliary lines and auxiliary surfaces to improve the processing condition.

6. Where the slope is an integer, use a slope cutter to process, such as pipe position. In order to avoid making a clear cutting tool in the previous or after machining.

7. Establish a sense of responsibility and check each parameter carefully to avoid rework. Diligent in learning, good at thinking, and continuous progress. When milling non flat surface, use ball cutter more, use less end knife, do not be afraid to connect knife; small knife angle cleaning, big knife finishing; don’t be afraid of patching, proper patching can improve the processing speed and beautify the processing effect.

The above seven items are the matters needing attention in the process of CNC aluminum parts processing summarized by Shenzhen shengyuanda Hardware Products Co., Ltd. We hope customers will pay more attention to avoid accidents and affect the normal operation of the equipment when they are put into use.

How to arrange CNC machining sequence of high precision aluminum parts

The production of hardware products is inseparable from CNC processing technology. The novices who are not familiar with the industry or are just beginning to know little about CNC processing technology. Shenzhen shengyuanda Hardware Products Co., Ltd. is committed to CNC processing of high-precision aluminum parts, which has strict requirements for processing procedures. How to reasonably arrange CNC processing sequence of high-precision aluminum parts in the operation of the author in this industry for many years What about it?

In the CNC processing workshop of aluminum parts, everyone has different working positions, but we must be familiar with and keep in mind the processing principles, such as the principle of first priority and then the secondary principle. What is the specific meaning?

Operators should first process the main working surface and assembly base surface of the parts, so as to find out the possible modern defects on the main surface of the blank as soon as possible. The secondary surface can be interleaved after the main machined surface is machined to a certain extent and before Zui final finishing.

Of course, there are certain rules in the processing of different aluminum parts, which need to follow the principle of surface first and then hole. The plane outline size of box and bracket parts is large, and the plane is generally processed first, and then the hole and other dimensions are processed. This arrangement of processing sequence, on the one hand, it is stable and reliable to use the processed plane for positioning; on the other hand, it is easy to process holes on the processed plane, and can improve the machining accuracy of holes, especially when drilling holes, the axis of holes is not easy to deviate.

Of course, the CNC machining process of high-precision aluminum parts should follow the principles of first coarse and then fine, first near and then far, and the principle of base surface first is not introduced here. In a word, after selecting CNC processing methods and dividing working procedures, the main content of the process route is to reasonably arrange these processing methods and the sequence of processing procedures. Only orderly processing can improve the processing quality and production efficiency of parts.

What clamping methods are used in CNC machining of aluminum frame

As an important link in CNC machining of aluminum frame, some novices only know a little about CNC machining. What Xiaobian wants to say is that the basic principle of clamping is horizontal length and vertical short. Next, senior operators will explain to you what are the lower clamping methods?

Splint clamping is specifically used to code the splint on the CNC processing table, and the workpiece is locked on the splint with screws. It is suitable for clamping with insufficient height, and can also be applied to workpieces with large processing force or general medium and large workpieces, and the effect will be good.

The clamping of cutting tools refers to that the diameter is more than 10 mm, and the clamping length is not less than 30 mm; when the diameter is less than 10 mm, the clamping length should not be less than 20 mm. The clamping of the tool should be firm to prevent the phenomenon of hitting the tool or directly inserting into the workpiece.

CNC machining of aluminum frame

The clamping height of vise should not be less than 10 mm. It is necessary to specify the clamping height and processing height when processing workpieces. The processing height should be about 5mm higher than the vise plane to ensure the firmness, so as not to damage the vice. The clamping height is related to the size of the workpiece. When the workpiece is large, the clamping height increases accordingly.

Code iron clamping is mainly used when the workpiece is large and the clamping height is not enough, and it is not allowed to lock the wire at the bottom. This kind of clamping needs to be clamped twice. First, the four corners should be coded, and then the other parts should be processed, and then the four sides should be coded to process the four corners. During the second clamping, do not let the workpiece loose, code first and then loosen. You can also code both sides and process the other side.

From the above several clamping methods, it is not difficult to find that the different processing methods are different. In the CNC machining process of aluminum frame, we need to select according to the specific workpiece.

Scheme of reducing surface damage of aluminum profile by CNC machining

Aluminum profile surface damage is a problem that many aluminum alloy CNC processing enterprises will encounter. How to prevent or reduce aluminum profile surface damage? As the surface damage of aluminum profiles will greatly reduce the production rate of aluminum profiles and increase the production costs of many enterprises, we find that this problem has become a hot topic for most enterprises.

In order to solve the problem of surface damage of aluminum profiles, we must find out the causes and find solutions. What causes the surface damage of aluminum profile during CNC machining? Let’s talk about the human factors and the reasons for the CNC processing equipment of aluminum alloy.

Human factors mainly refer to the damage caused by some unfamiliar operators dragging profiles on the pendulum bed. There is also in the process of transportation, the improper placement of aluminum profiles, making the profile friction or extrusion between the formation of damage.

If the damage is caused by processing equipment, it is not ruled out that the mold cavity or work with dust and debris, so that the hardness of the working belt is low, causing aluminum profile scratch in the extrusion process.

If there are aluminum chips in the CNC machining track or swing table, the aluminum profile surface may be scratched and the yield will be affected.

In short, there are many factors that affect the surface scratch of aluminum profile, so how should we deal with it?

For the damage caused by human factors, we should strengthen the management of personnel, aluminum profiles need to be handled with care to avoid random dragging phenomenon. For the problems in the processing process, the author suggests that we regularly check the CNC machining track and swing table of aluminum alloy, and remove the impurities and aluminum chips on them. When placing, there should be a gap in the middle and lay more felt. Prevent collision and friction