CNC Machining China blog - Precision CNC Machining Solution for Metals

  The car air conditioner controller should be able to control the evaporating temperature, superheat, compressor speed, electronic expansion valve opening, evaporator fan speed and car interior temperature at the same time according to certain performance indicators. Unlike household air conditioners, the speed of the car air conditioner compressor changes with the speed of the car engine. The cooling capacity of the car air conditioner is greatly affected by the engine speed. Therefore, the car air conditioning control system is a multivariable control system. The coupling relationship of various control parameters affects the quality of the car air conditioning control system. Therefore, it is very important to design a controller with a simple precompensator to decouple the coupling system of the car air conditioner. Air conditioning system is mainly composed of compressor accumulator, expansion valve and other equipment. In the traditional semi-m...

　　The three major tests for evaluating the quality of lubricants are more critical. As a standard for comprehensively evaluating lubricant quality, countries around the world have basically become consistent, establishing a quality standard consisting of four parts: physical and chemical indicators of lubricants, simulation tests, bench tests, and driving tests. system. The physical and chemical indicators are the basis. The physical and chemical indicators used to measure the basic performance of lubricants include: kinematic viscosity, low temperature dynamic viscosity, viscosity index, flash point, pour point, sediment, moisture, foam, residual carbon, neutralization value, sulfate ash content And the content of various elements and so on.These physical and chemical indicators are only the basic indicators for measuring lubricating oil. If even the physical and chemical indicators are unqualified, then the following simulation tests and bench tests will ...

Stainless steel is difficult to process mainly due to the poor thermal conductivity of stainless steel, and the heating of the chip material will easily form a buildup on the tip of the tool, which is the main cause of damage to the blade. In addition, because of the large cutting force and high cutting temperature during processing, it brings some difficulties to the processing, and it is often difficult to achieve satisfactory results when cutting. We learned from a engineer who has been in business for 40 years that there are also some tips for stainless steel processing. Let's share the difficulty of stainless steel cutting today ! Stainless steel cutting tips Table of Contents Stainless steel cutting tips the blade Angle of the cutting tool must be 0, and it can be ground on a tool grinder if possible, This is the most important point. Because when 304 stainless steel is cutting, the chips and the groove wall friction are serious...

1, break the principle of chips Table of Contents 1, break the principle of chips 2, the influence of the chip breaker on (curl) chipping (1) Shape of chip breaker 3. The main parameters of the full arc type chip breaker are groove width B, groove bottom arc radius Rn, and rake angle γ (see Figure 5c). Width of chip breaker Whether the chipping is fragile or not, during metal cutting, is directly related to the deformation of the chipping, so in the study of the principles of chipping and fracture, it is necessary to start the study of the law of chipping the deformation. The chippings formed during the cutting process will have higher hardness as well as significantly lower plasticity and toughness due to the relatively large plastic deformation. This phenomenon is called cold work hardening. After cold curing, the chipping becomes hard and brittle and breaks easily under alternating bending or impact loads. The greater the plastic deformation that chi...

The cleaning of car windows is not only an issue of appearance, but also a necessity in terms of safety. Especially on rainy nights, the dazzling oil film will affect the field of vision and must be removed immediately. If it is slightly dirty, you can wipe it with a towel and car without using a car body cleaner. You can wipe it off immediately or remove the oil film. After the dirt is completely removed, apply a protective agent, which can make the oil film difficult to adhere. 1. Dirty car windows threaten safety. When driving at night on rainy days, the wiper wiped off and the residual oil film is dazzling, which greatly affects the vision. 2. Thoroughly clean the windows of the car, the vision is immediately clear, and it is easier and safer to drive at night. 3. If the oil film attached to the glass is difficult to remove by ordinary methods, use a chemical synthetic agent for removing the oil film to wipe it. 4. Not only the outside, but also the ...

The water pump housing of the riding motorcycle is installed in the front of the left axle box cover, while the water pump housing of the sitting motorcycle is actually installed in the front of the right axle box cover. When the impeller on the water pump shaft rotates, a vacuum is formed at the center of the impeller. The coolant from the hose under the radiator just leads to the center of the impeller and enters the pump. The impeller rotates with the coolant, and the coolant is thrown away due to the centrifugal effect of rotation. It is thrown to the outer edge of the impeller and has a certain pressure, and is transported to the water jacket of the cylinder under the guidance of the centrifugal guide groove at the outer edge of the impeller of the casing. When the temperature of the coolant is higher than the temperature of the coolant, the yellow wax in the inner cavity of the thermostat is heated to melt and become liquid, the yellow wax expands in v...

For fasteners surface treatment, people generally pay attention to beauty and corrosion, but the main function of fasteners is to tighten parts, and surface treatment has a great impact on fasteners fastening performance, so when choosing the surface treatment, should also consider the fastening performance factor, that is, the installation torque – pretightening force consistency. The surface treated coating must be firmly attached and cannot fall off during installation and removal. For threaded fasteners, the coating must be thin enough to allow the thread to spin after plating.Generally, the temperature limit of the coating is lower than that of the fastener material, so it is necessary to consider the working temperature requirement of the screws fastener. An excellent screw man should not only consider the design, but also pay attention to the assembly process, and even environmental requirements.There are many types of surface treatments to...

Many would say that when it comes to ultra-precision electrode machining, it’s very simple. Machines are often bought, tools are used correctly, materials are used well, machining techniques are sophisticated, lower knives are used less, and feed rates are slower. Ultra-precision electrode machining is absolutely not that simple, there are more requirements, and there are more things to watch out for. Share a practical analysis of PTJ Cnc Machining plant. Ultra-precision electrode programming considerations and machining requirements, we hope everyone will like it! 1. Each part of the electrode must be fully engraved with the model number, part number, plate number, gap, position number, and manufacturer.Example 1: 1202B39C51-103A -0.05mm JLS (small fixture);Example 2: 1202B39C51-104C -0.05mm E JLS (Large jig) 2. Electrode copper material must be machined according to the requirements of the list and NC machining program. (Red copper / alloy copper is...

  The structure and function of fuel filter The structure of the fuel burner is composed of an aluminum shell and a stainless steel bracket. The bracket is equipped with a high-efficiency filter paper assembly. The filter paper is seen as a chrysanthemum to increase the flow area. The EFI filter cannot be combined with the carburetor. The filter is universal. Because the EFI filter often bears the fuel pressure of 200～300kPa. Therefore, the pressure strength of the filter is generally required to reach more than 500kPa, and the filter of the carburetor cannot meet the requirements. The function of the fuel filter is to remove the iron oxide, dust and other solid impurities contained in the fuel, prevent the fuel system from clogging, reduce mechanical wear, ensure stable engine operation, and improve reliability. Fuel filter replacement instructions The fuel filter must be replaced every 30,000 kilometers. If the fuel impurity content is large, the ...

　　The friction coefficient of the sand-sticking roller is similar to the real road surface, which can simulate the actual braking situation of the car, increase the speed of the car and then brake, detect the braking force of the left and right wheels on the same car, and evaluate the car through calculation The braking performance of the car, the braking efficiency and stability data of the car during braking are given. The reaction roller brake test bench puts the front and rear wheels of the tested car on two rollers respectively. The two rollers rotate in the same direction under the drive of a motor and drive the wheels to rotate. At this time, the rolling of the wheels can be measured. resistance. When the brake air pressure of the tested car is greater than one atmosphere, the motor drives the wheels to rotate at the equivalent speed, and the tested car will brake. At this time, the wheel gives the roller a force that is opposite to the driving direct...

Classification of stainless steel Magnetic and non-magnetic stainless steel Stainless steel can be roughly divided into three categories: 200 series, 300 series, and 400 series. The 300 series is the most commonly used. The 200 series and 400 series are substitutes for the 300 series to a certain extent. Strictly speaking, the 400 series is not called stainless steel. , Called stainless iron, because it does not contain nickel, it can be attracted by a magnet. The 200 series and 300 series have nickel, which is not magnetic and cannot be absorbed by iron. 304 is the most common variety in the 300 series, so generally the price trend of the entire stainless steel can be judged from the price change of 304. The 200 series contains less nickel, the 400 series does not contain nickel, and the 300 series contains the most nickel. Therefore, the 300 series is most affected by nickel prices. The 300 series can be divided into 304, 304L, 316, 316L, 321, 309S...

1) Determine the size of the die. The blanking die uses an integrated die and a wire cutting machine. When the die position is placed on the die holder, the pressure center and handle center should overlap according to the pressure center data. The dimensions are calculated according to the relevant formula. Mold thickness H = KL = 0.38 × 30 = 11.4 (mm) Mold thickness H = 15mm Mold wall thickness c = (1.5 ~ 2) H = (22.5 ~ 30) mm Set mold wall thickness to c = 25mm Die width B = L + 2c = 30 + 25 × 2 = 80 (mm) Set die width B = 80mm Die length L = L + 2S2 = 30 + 2 × 25 = 80 (mm) Set the die length to L = 80mm Die dimensions L x B x H = 80 mm x 80 mm x 15 mm 2) Select a typical combination The shape of the punch is 80mm x 80mm x 15mm, and the typical combination is 80x80x180 to 220 (GB2873.2-81). 7.2 Concave design 1) The position of the hole. Gets the position created from the layout. 2) Aperture type. Obtained with a leading edge size. 3) Blade ...

With the rapid development of China's automobile industry and the huge growth of the auto parts industry, more and more merchants are engaged in auto parts distribution in Nanchang. Located in the urban area, the prosperity of business hinders road traffic and affects the appearance of the city. The existing street can no longer meet the needs of the growing auto parts team. Nie Hui once again realized his career development from the eyes of a businessman sensitive tax. A new opportunity is here. He wants to build a modern auto parts city with a certain scale, complete supporting facilities, more standardized operation, high starting point and high requirements. Considering the future development of the city, Nie Hui chose a site more than ten kilometers away from the urban area. At that time, apart from a few production enterprises, there was no commercial atmosphere, and even the Xiaolan Industrial Park, which was not accessible by buses, acquired 490 ...

In the past, most people who bought a display focused on the quality of the display. However, as panel technology continues to mature, new products have less innovation and less differences in manufacturer’s product specifications and parameters. In addition, the concept of fashion trends gradually influences purchasing choices. At this time, the level of display manufacturing technology greatly determines the core competitiveness of a display. CNC precision technology Table of Contents CNC precision technology Precision work Ultra-thin border Cnc Processing All metals In recent years, new display manufacturing processes have been continually improved to produce ultra-thin, ultra-fine bezels, all-metal wire, tempered glass and more. Make your display look more stylish and beautiful. When it comes to display manufacturing, we need to mention HKC’s first new P2 in 2015. This is a surprisingly unique craft design product. Metal wire drawing pro...

It can be seen that the dimensional accuracy of the part processed by deep drawing can meet the dimensional accuracy requirements of the part. This part is an appearance part, which has high requirements on appearance, so it should be considered when arranging the process sequence and mold design. Process plan determination According to process analysis, the possible process plans are mainly as follows: Option 1: Blanking deep drawing (outer edge 5424, height 22) → reverse drawing (inner circle shape 5257) → shaping (inner and outer edge) → Punching (10 to 558 flanging bottom hole) → flanging (10 holes) punching the inner hole 5251. Plan two: deep drawing 5257 → shaping → trimming and punching → flanging (outer edge) → punching (10?558 flanging bottom hole) → flanging (10?558). Scheme 3: Drawing 5257 → shaping → trimming and punching (5251, 10?558 flanging bottom hole) → flanging (outer edge and hole edge). The advantages of the first plan: blanking and p...

As sales rebounded and the prices of raw materials are almost comprehensive, the prices of auto parts have been increased several times, which has pushed up the prices of auto parts. The thin plates in ferrous metals increased from 20 yuan per ton at the beginning of the year to 6,000 yuan in July, leading to an increase in the prices of car cabs, bodies, and cargo compartments. The prices of non-ferrous metals such as copper, tungsten, lead, and zinc have risen across the board. The price in 1989 was significantly lower than the previous year. In the first half of 1989, the sales of accessories were still optimistic, with prices showing an upward trend. This has a direct impact on the continued price increase of some raw materials. The ex-factory prices of finished products based on the above-mentioned raw materials in auto parts will be increased. The increase in the price of some accessories is also a “tail-lifting” factor in the price of the p...

Do you know the price of these CNC aluminum parts? Table of Contents Do you know the price of these CNC aluminum parts? Everyone is familiar with CNC aluminum parts. CNC aluminum parts are used in many industries, such as medical industry, oil and gas industry, transportation industry, electronics industry and Marine industry.The CNC process for the production of CNC aluminum parts is also widely used in the aerospace industry, because of its excellent accuracy, which is very important in aerospace technology.So what we want to talk about today is the price of CNC aluminum parts. Then, how much is the price of CNC aluminum parts?Let's take a look   Let's not mention the factors affecting the price of CNC aluminum parts. Let's first have a look at the how much  some conventional CNC aluminum parts.   The cost of some common metals used in Cnc Machining parts is: Aluminum 6061 costs $25 per block Aluminum 7075 costs $80 per block Stain...