Quality Control
How does TechPro provide the best quality machine bed ?
The bed of the machine is the main reason that affects the accuracy. The manufacture of the bed is especially important. A good machine bed can be unchanged for 15-20 years. However, in the Chinese market, the processing technology of the bed is very different, and often some customers only pay attention to the price, not the quality, resulting in problems with the accuracy of the machine for a period of time. If you are a novice, please pay more attention！ Here i introduce the processing technology of TechPro machine bed to you as follows :
1. Raw material preparation for the bed: TechPro’s bed welding usually uses high-strength steel (such as structural steel or alloy steel), which can maintain good strength and stability after welding. The selection of materials is very important, and the quality and welding adaptability of the steel must be ensured. Ps: We are not like some other manufacturers who use inferior steel to save costs, which not only affects product quality but may also lead to long-term economic losses. TechPro insists on long-term responsibility for customers, and 100% make sure the long-term reliability of the bed.
2. TechPro CNC Machine Body Manufacturing Processes:
① Multi-temperature quenching of ductile iron: ductile iron can obtain high strength after isothermal quenching, and has good plasticity and toughness at the same time.
② Stress relief annealing: due to the uneven wall thickness of the casting, in the process of heating, cooling and phase transformation, effect stress and structural stress will be generated. In addition, large parts are prone to residual stress after machining, and all these internal stresses must be eliminated. The usual heating temperature for stress relief annealing is 500~550℃, the holding time is 2~8h, and then furnace cooling (grey iron) or air cooling (ductile iron).
③ High-temperature graphitization annealing to eliminate the white mouth of the casting: when the casting is cooled, white mouth often occurs on the surface layer and thin section. The white mouth structure is hard and brittle, with poor processing performance and easy to peel off. Therefore, annealing (or normalizing) must be used to eliminate white mouth tissue. The annealing process is: heating to 550-950℃ for 2~5h, then furnace cooling to 500-550℃ and then air coolin:
④ Normalizing of ductile iron: the purpose of normalizing ductile iron is to obtain pearlite matrix structure, refine grains, and uniform structure, so as to improve the mechanical properties of castings. Sometimes normalizing is also the preparation of ductile iron surface quenching on the structure, normalizing is divided into high temperature normalizing and low temperature normalizing. The high temperature normalizing temperature is generally not more than 950~980℃, and the low temperature normalizing temperature is generally heated to the common folding temperature range of 820~860℃. After normalizing, four people are generally required to deal with it to eliminate the internal stress generated during normalizing.
⑤ Quenching and tempering of ductile iron: in order to improve the mechanical properties of ductile iron, generally castings are heated to 30~50°C above Afc1 (Afc1 represents the final temperature of A formation during heating), and then quenched into oil after heat preservation to obtain martensitic body tissue. In order to properly reduce the residual stress after quenching, generally, tempering should be carried out after quenching. The low-temperature tempering structure is tempered martensite plus residual bainite and spherical graphite. This structure has good wear resistance and is used for parts that require high wear resistance and high strength.
⑥ Chemical heat treatment: for castings that require surface wear resistance, oxidation resistance, and corrosion resistance, chemical heat treatment processes similar to steel can be used, such as gas soft chlorination, chlorination, boronizing, sulfurizing and other treatments.
⑦ TechPro’s factory uses robotic arm welding, which provides high precision, efficiency, safety and flexibility, significantly improving welding quality and production efficiency. Especially in a large-scale production environment, robotic welding can not only reduce production costs, but also ensure product consistency and quality. It is an important development direction of the modern manufacturing industry.
⑧ TechPro factory uses world-renowned machining center milling machines to perform high-precision processing on the CNC machine bed, ensuring that the workpiece size and tolerance requirements are strictly controlled.
⑨ Surface treatment: sandblasting or polishing is performed to remove surface defects and increase surface roughness to improve coating adhesion and prepare for the painting process.
What is the painting process for TechPro machine bed ?
1The painting process will also affect the life of the machine. If one step is missing, the machine will rust and crack for a long time. If you are a novice and only pay attention to the price and not the machine painting process, I don’t think you can get a good machine. Here i introduce the technical requirements for the painting process (painting process) of TechPro CNC machine bed are as follows :
1.Before painting the machine bed, check the castings of the bed, use tools to trim the unevenness of the surface, and remove the dirt on the surface.
2. The machined bed casting must be rinsed or brushed with metal cleaner or clean industrial gasoline before painting to ensure that oil and other dirt on the surface are completely removed.
The primer should be applied evenly by brushing, spraying, or dipping. The primer must be fully stirred before use, and diluted to an appropriate year before applying.
3. The putty that fills the depression of the casting should be added with an appropriate amount of curing agent according to the product’s instructions for use, and must be fully stirred before use.
4. If vinyl perchloride is used to fill the depressions of the bed casting, each scraping should not be too thick. The thickness of scraping is generally about 0.5 mm. Each scraping must wait for the material to be scraped to dry before proceeding.
5. After filling the depression of the bed casting with perchloroethylene, it must be dry before grinding. After each grinding, the grinding slurry and dust on the surface need to be completely removed.
6. Use water grinding technology for grinding. In order to prevent the machine tool casting from rusting on the processed surface, it is necessary to use anti-rust water for grinding.
After grinding, if there is metal exposure, it is necessary not to brush the matching primer.
7. After the last putty is polished and cleaned, it is necessary to spray the second primer of vinyl chloride, which can improve the flatness of the paint film and improve the gloss of the paint film.
8. Apply 2-3 coats of primer as needed to ensure even coverage so that it can effectively prevent rust and enhance adhesion. Wait for the primer to dry completely (usually takes 1-2 hours depending on the type of primer and ambient temperature. After confirming that the primer is dry, check whether the surface is flat and polish and correct it if necessary. Clean the primer surface with clean compressed air and non-woven cloth to remove any debris.
9. Spraying topcoat: Use a spray gun to evenly spray the topcoat to avoid sagging and bubbles. Usually spray 2-3 coats of topcoat, ensuring drying time between each layer (usually 30 minutes to 1 hour) to improve smoothness and gloss. After spraying, check the surface leveling again and polish if necessary. Place the sprayed bed in a ventilated environment to avoid dust and moisture affecting the coating effect. Depending on the requirements of the coating, the curing process can be accelerated by a heating device to enhance the hardness and wear resistance of the coating.
Quality inspection: Check the spraying surface to ensure there are no bubbles, impurities and coating defects. Local repairs can be made if necessary.
Cleaning the spraying equipment: Use detergent or special cleaning fluid to clean the spraying equipment to keep the equipment clean and in good working condition.
How does TechPro CNC machine maintain accuracy ？
The debugging of the machine is an important step to ensure the normal operation of the equipment, improve the processing accuracy and reduce the error. In the debugging process, using the right instrument is the key. The following is a detailed introduction of the instruments that TechPro mainly uses for machine debugging and their functions, as well as how they can improve working accuracy and reduce errors:
1. Coordinate Measuring Machine (CMM): measures the three-dimensional coordinates of a workpiece and can accurately determine the geometric features of the workpiece, whether it is a line, surface or point. Through programming, it can automatically measure multiple points to ensure the consistency of the test results and eliminate human measurement errors.
2. Laser interferometer: uses laser beams to measure linear displacement and angles, and is used to detect the dynamic accuracy and positioning accuracy of the machine. It provides real-time data and can accurately monitor the deviation of the machine during movement, ensuring that high accuracy is always maintained during processing.
3. Level meter: It is a basic precision test tool for measuring the levelness and straightness of each part of the machine. Through basic level measurement, it can effectively reduce the processing error caused by machine tilt.
4. Electric shaft measuring instrument: It is a high-precision measuring tool, mainly used to detect the accuracy and operating status of motor shafts, spindles and other rotating shafts. It plays an important role in many industrial fields, especially in mechanical equipment that requires high precision and high reliability, such as engraving machines, CNC machine tools, machining centers, etc.
5. Micrometers and calipers: They are common measuring tools and are widely used for both fine and daily measurements. They play an important role in manufacturing, engineering, and craftsmanship.
Contact Info
Room 404,Building 3,Zhongrun Century Center,Jingshi Road,Lixia District,Jinan City,Shandong Province,China
WhatsApp: 0086-176 8668 3792
Email: admin@techprocnc.com
Web: www.techpro-cnc.com
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