China Shenzhen Perfect Precision Product Co., Ltd. company news

What are the principles of CNC processing route?

Generally, CNC machining usually refers to computer-controlled precision machining, CNC machining lathes, CNC machining milling machines, CNC machining boring and milling machines, etc. In NC lathe processing, the determination of processing route should generally follow the following principles. 1. The accuracy and surface roughness of the machined workpiece shall be ensured. 2. Make the processing route short, reduce the empty travel time, and improve the processing efficiency. 3. Try to simplify the workload of numerical calculation and simplify the processing procedure. 4. For some reusable programs, subroutines should be used.

2022

07/20

Accuracy analysis of CNC turning milling compound machining

Among them, the main influencing factors of machining accuracy, the main machining methods and the interaction between controllable factors in production are more important. During CNC turning milling compound machining, the tool performs intermittent cutting, and the workpiece formed by any material can be cut in a relatively short time, which is easy to remove chips actively. Moreover, intermittent cutting can make the tool have sufficient time to cool, reduce the thermal deformation of the workpiece, and improve the service life of the tool. Compared with traditional CNC machine tools, CNC turning and milling machining has higher speed, better cutting product quality, reduced cutting force, improved the accuracy of thin-walled bars and slender bars, and high workpiece forming quality. When the CNC turning milling machine tool processes the workpiece, the low rotation speed of the workpiece can effectively reduce the centrifugal force of the workpiece, avoid the deformation of the workpiece, and improve the machining accuracy of the parts. The use of large longitudinal feed in CNC turning and milling composite processing can also get accurate cutting, and the surface roughness can also be useful to ensure that CNC turning and milling composite processing machine tools can use different methods such as turning, milling, drilling, boring to complete the processing of workpieces, and workpieces can also be clamped at one time to complete the multi-faceted processing mission, so as to ensure the processing accuracy.

2022

07/20

Process flow and advantages of precision CNC4 shaft machining

In the field of mechanical processing industry, precision cnc4 axis processing actually refers to numerical control processing. First write the drawings that need to be processed into the program, and then connect the computer to the cnc4 axis processing machine tool, and command the machine tool to operate through programming to complete the processing of precision parts. Precision cnc4 axis processing is mainly applicable to the processing of small and large quantities of various types of spare parts. The precision of cnc4 axis processing parts is very high, so it serves the precision parts processing of different industries. The self inspection content mainly includes the position and size of the processing part. (1) Whether the mechanical parts are loose during processing; (2) Whether the processing technology of parts is correct, touch the starting point; (3) Whether the dimension from the part of the machined part of the cnc4 axis to the reference edge (reference point) meets the requirements of the drawing; (4) Position and size of machining parts of cnc4 axis. After checking the position and size, measure the rough machined shape ruler (except for the arc). Compared with three-axis machining, cnc4 axis machining has the following advantages: 1. Maintain the cutting state of the tool and improve the cutting conditions. 2. Effectively avoid tool interference. 3. Reduce the clamping times, and complete the processing of four sides at one time. 4. Improve processing quality and efficiency. 5. Shorten the production process chain and simplify production management. 6. Shorten the R & D cycle of new products

2022

07/20

Precision CNC machined parts

We are a customized production service enterprise integrating aluminum alloy profile kneading, mold design and production, precision CNC processing and appearance treatment. It has advanced linear bearing precision sawing machines, high-precision CNC milling machines, CNC vertical machining centers, CNC lathes, punches, various types of drilling machines, tapping machines, gouging machines and other processing equipment. Adhering to the service concept of "mutual benefit, win-win, integrity and innovation", we attach importance to the quality policy of quality and details, and sincerely provide high-quality services for our customers!

2022

07/20

What are the basic principles of precision CNC machining parts?

1. Benchmark first That is, the datum plane should be processed first. During the machining process, the surface as the positioning datum should be processed first, so as to provide a fine datum for the processing of subsequent processes as soon as possible. 2. Distinguish processing stages Precision CNC machining requires high quality appearance, which can be divided into three stages: rough machining, semi finishing and finishing. The first is to ensure the processing quality; It is conducive to the scientific use of equipment; Easy to organize heat treatment process; And it is convenient to find the defects of the blank. 3. Face before hole For parts such as box, support and connecting rod, the plane shall be machined first and then the hole shall be machined. In this way, the hole can be machined by plane positioning, ensuring the azimuth accuracy of the plane and the hole, and bringing convenience to the machining of the hole on the plane. 4. Finishing processing The finishing of the primary surface, such as grinding, honing, fine grinding, rolling, etc., should be placed at the end of the process path. The formulation of general guidelines for fine CNC processing and the formulation of precision CNC processing procedures can be roughly divided into two links. First, draw up the process path of parts processing, and then determine the process scale, equipment and process allocation, cutting standard, man hour quota, etc. of each process.

2022

07/20

Manufacturing plastic mold and its surface treatment

Mould 1. Low carbon steel and low carbon alloy steel moulds 2. High alloy carburized steel mold 3. Quenched and tempered steel mold 4. Carbon tool steel and alloy tool steel mold 5. Pre hardened steel mold Surface treatment In order to improve the wear resistance and corrosion resistance of plastic mold surface, appropriate surface treatment is often carried out. 1. Chromium plating on plastic mold is a surface treatment method that is most used. The chromium plating layer has strong passivation ability in the atmosphere, can maintain the metallic luster for a long time, and does not have chemical reaction in a variety of acidic media. The hardness of the coating reaches 1000hv, so it has excellent wear resistance. The chromium plating layer also has high heat resistance, and its appearance and hardness remain unchanged when heated to 500 ℃ in air. 2. Nitriding has the advantages of low treatment temperature (generally 550 ~ 570 ℃), little mold deformation and high hardness of nitriding layer (up to 1000 ~ 1200hv), so it is also very suitable for surface treatment of plastic mold. The steel containing chromium, molybdenum, aluminum, vanadium, titanium and other alloy elements has better nitriding performance than carbon steel. Nitriding treatment can greatly improve the wear resistance when used as a plastic mold. The surface treatment methods suitable for plastic mold include nitrocarburizing, electroless nickel plating, ion plating titanium nitride, titanium carbide or titanium carbonitride, PVD, CVD deposition of hard film or ultra hard film.

2022

07/19

Advantages of electroplating of aluminum and aluminum alloy materials

It has the advantages of good conductivity, fast heat transfer, light specific gravity, easy forming, etc., but aluminum and aluminum alloys have the disadvantages of low hardness, no wear resistance, easy intergranular corrosion, difficult welding, etc., which affect the scope of use. Therefore, in order to develop strengths and circumvent weaknesses, electroplating is used to solve this problem in modern industry. 1) Improve decoration 2) Improve surface hardness and wear resistance 3) Reduce friction coefficient and improve lubricity 4) Improve surface conductivity 5) Improve corrosion resistance 6) Easy to weld 7) Improve the adhesion with rubber during hot pressing 8) Improve reflectance 9) Repair dimensional tolerance As aluminum is a relatively active metal, the electroplated substances are more active than aluminum. Therefore, before electroplating, corresponding chemical conversion must be done, such as zinc immersion, zinc iron alloy, zinc nickel alloy, and the intermediate layer cyanide copper plating layer with good adhesion between zinc and zinc alloy bottom layer. Due to the loose structure of the die-casting aluminum body, the surface part of the body cannot be polished off during grinding, otherwise pinholes, acid spitting, peeling and other phenomena will occur.

2022

07/19

Technological process of aluminum plating

Degreasing - > alkaline corrosion - > activation - > zinc replacement - > activation - > electroplating - > chromium plating or passivation - > drying Application of common plating seeds 1) Black plating, such as black zinc, black nickel, etc., are used in optical electronics and medical devices. 2) Gold plating and silver plating are the best conductors of electronic products. At the same time, they can also improve the high decoration of products, but the price is relatively expensive. They are generally used in the conductivity of electronic products, such as the electroplating of high-precision wire terminals. 3) Copper, nickel and chromium are the most popular mixed plating species in the field of modern science. Both in terms of decoration and corrosion resistance, they are the most popular plating species in the world at present. It is cheap and can be used in sports equipment, lighting and most electronic industries. 4) Among the copper plating species, white tin copper is developed in the 1970s and 1980s for environmental protection. It is white and bright, and is the first choice in the jewelry industry. Bronze (lead tin copper can be used to imitate gold, so it is a better decorative plating species) but the anti tarnishing property of copper is relatively poor, so its development is relatively slow. 5) Zinc electroplating: the zinc coating is cyan white and soluble in acid and alkali. Since the standard potential of zinc is negative than that of iron, it can provide reliable electrochemical protection for steel. Zinc can be selected as the protective layer for steel products used in industrial atmosphere and marine atmosphere. 6) Hard chromium, the chromium coating deposited under certain conditions has high hardness and wear resistance, reaching hv900-1200kg/mm. Chromium is the coating with the highest hardness in common coatings, which can improve the wear resistance of parts and prolong the service life. Such as tooling, mold, measurement, fixture, etc. Therefore, this kind of plating is an indispensable treatment method for cylinder, oil pressure and transmission system.

2022

07/19

Precautions for aluminum and aluminum alloy electroplating operation

1) Aluminum alloy should be used as hanger for electroplating of aluminum parts; 2) All processes of aluminum and aluminum alloy after etching must be carried out quickly. The shorter the interval between processes, the better, so as to avoid re oxidation; 3) The second zinc dipping time should not be too long to avoid excessive corrosion; 4) Wash it with water; 5) During the electroplating process, it is necessary to prevent power failure halfway.

2022

07/19

Method of measuring precision in machining precision metal parts

Precision metal parts processing can be divided into measurement and relative measurement according to whether the reading value of the gauge directly represents the value of the measured dimension. Absolute measurement: the reading value directly indicates the size of the measured size, such as measuring with a vernier caliper. Relative measurement: the reading represents the deviation between the measured size and the standard quantity. If the diameter of the shaft is measured with a comparator, the zero position of the instrument should be adjusted with a gauge block first. The measured value is the difference between the diameter of the side shaft and the size of the gauge block, that is, the measured value. Generally speaking, the measurement accuracy is higher and the measurement is more troublesome. Precision hardware parts processing can be divided into contact measurement and non-contact measurement according to whether the measured surface is in contact with the measuring head of the measuring instrument. Contact measurement: the measuring head is in contact with the contact surface, and there is a precise measuring force. For example, measure parts with micrometer. Non contact measurement: the measuring head is not in contact with the surface of the measured part, and non-contact measurement can avoid the influence of measuring force on the measurement results. Such as projection method and light wave interference method. Precision hardware parts processing can be divided into direct measurement and indirect measurement according to whether the measured parameters are measured directly or not. Direct measurement: directly measure the measured parameters to obtain the measured dimension. For example, measure with caliper and comparator. Measurement: the measured geometric parameters are measured indirectly. In conclusion, it is obvious that direct measurement is more intuitive and indirect measurement is more cumbersome. Generally, when the measured dimension or direct measurement cannot meet the accuracy requirements, indirect measurement has to be used.

2022

07/19

China Shenzhen Perfect Precision Product Co., Ltd. company news

What are the principles of CNC processing route?

Accuracy analysis of CNC turning milling compound machining

Process flow and advantages of precision CNC4 shaft machining

Precision CNC machined parts

What are the basic principles of precision CNC machining parts?

Manufacturing plastic mold and its surface treatment

Advantages of electroplating of aluminum and aluminum alloy materials

Technological process of aluminum plating

Precautions for aluminum and aluminum alloy electroplating operation

Method of measuring precision in machining precision metal parts

CNC Turning Parts

CNC Milling Parts

CNC Turning Milling Parts

CNC Machined Aluminum Parts

CNC Stainless Steel Parts

Machining Plastic Parts

CNC Brass Parts