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

CNC machining core does not spill the phenomenon of key components not assembled well, we used to be in the application of CNC machine tools machine tools in addition to pick some stronger large cnc machining plant in order to better be able to better quality assurance, but also must let the technical assembling staff to undertake assembling, and thus better be able to ensure its smooth operation. The customer also has to check whether the pipeline is blocked, if it is the word to apply the cleaner to blow the drain. The water storage tank is relatively low. CNC machining core often does not sprinkle water is due to the gas inside the centrifugal water pump, the gas discharged from the pump can guarantee that it can all normal sprinkle water; compared with other difficulties, this problem is very easy to deal with relativity.   CNC high precision parts CNC lathe processing, usually is to increase the cohesion of the hazards, with CNC lathe three jaws or four jaws chuck twist tight parts, and subsequently terminate the mechanical parts processing. At the same time to make the clamping force above the mechanical equipment cutting speed to ensure that the parts do not loosen and reduce the nominal diameter force... The clamping force expands with the increase in cutting speed, and then decreases. Large cnc machining plant this type of work ability to make mechanical parts in the processing of the whole process smooth. Unbeknownst to us, after the three-jaw or four-jaw chuck is loosened, the machined parts will have a large difference from the original, some occur irregular graphics, some occur elliptical type, mainly showing a relatively large error.

The common types of wear and tear of precision parts machining mainly include running wear, hard grain wear, surface fatigue wear, thermal wear, phase change wear and hydrodynamic wear.   Run-in wear is the wear of machinery under normal load, speed and lubrication conditions, this wear is generally slow to develop, and the short-term impact on the quality of machining is not significant. Hard particle wear is due to the parts themselves dropped abrasive particles or by the outside world into the machine tool hard particles, mixed into the processing area, subject to mechanical cutting or grinding, causing damage to the parts, which is more serious impact on the quality of processing.   Precision parts processing surface fatigue wear is machinery under the action of alternating load, produced a small crack or class point-like crater, thus causing damage to the parts. This kind of wear is usually closely related to the pressure size, load characteristics, machine material, size and other factors.   Heat-like wear is parts in the friction process generated by the heat on the parts, so that the parts have tempering softening, scorching creasing and other phenomena. This type of wear usually occurs in the high-speed and high-pressure sliding friction, wear is more destructive, and accompanied by the nature of accidental wear. Corrosion wear is a chemical effect, that is, chemical corrosion caused by wear. When the parts surface and acid, alkali, salt liquid or harmful gas contact, it will be chemical erosion, or parts surface and oxygen combined to generate easy to fall off the hard and brittle metal oxides and make parts wear.   Phase change wear is parts of long-term work at high temperatures, parts of the surface metal tissue grain heat becomes large, the grain boundary around the oxidation, resulting in small gaps, so that parts fragile, wear resistance decreased, resulting in parts wear.

Precision parts processing nuts, studs, stainless steel production, with now is more and more intelligent, in the production of these equipment parts, choose accurate, high standard equipment, with the progress of science and technology, intelligent, automated instruments, equipment in the circulation of various fields has a very fast speed, which brings a new stage of challenges and opportunities for the development of precision parts. In this paper, we analyze the market demand and process concept of precision parts, combine the skills and problems in actual processing (limited to the scope of pincer work), and explore the solutions and techniques of the problems related to precision parts processing, so as to improve the quality of precision parts, improve the contradiction between market supply and demand, and promote the development of technological and intelligent society.   In actual production, the structure of each part may be very different, which also greatly increases the difficulty of processing. But if you look carefully, you can find that the basic geometric composition of the part is nothing more than the outer circle, bore, plane, thread, tooth surface, surface and so on several, so as long as you master the processing of these shapes, the difficulty of precision parts processing can also be significantly reduced. In the process of precision parts processing, the positioning reference is reasonable to choose or not to determine the quality of the parts, and whether to ensure the dimensional accuracy of the parts and mutual position accuracy requirements, as well as the processing order between the surfaces of the parts have a great impact on the arrangement. If the fixture is used to install the workpiece, the choice of positioning reference will also affect the complexity of the fixture structure. Therefore, the selection of the positioning datum is a very important process issue in the machining of precision parts.   Nowadays, mechanization and automation have been realized in the production process of parts, so the automated processing system can automatically monitor its operation status, and automatically adjust its parameters to achieve the best condition and self-organization capability when it is subject to external interference or internal excitation, thus significantly improving the efficiency of rough and finish machining while ensuring the machining accuracy.

The rigidity of large cnc machining directly affects productivity and machining accuracy, the greater the rigidity of the machine, the higher the dynamic accuracy, but how to judge the rigidity of CNCNC machining center? Shenzhen cnc machining factory collated some of the content for reference. First, the choice of cross-section shape and size   For the same shape of the cross-section, in the case of maintaining the same cross-sectional area, the preferred form of wall thickness is small, the size of the cross-sectional profile is large. The rigidity of the closed section is greater than the rigidity of the non-closed section. A hole in the wall reduces the rigidity, while the bending stiffness is restored by adding a flange around the hole.   Second, the selection and configuration of the spacer and reinforcing rib   Reasonable arrangement of support spacers and ribs can improve the stiffness of the member, for longitudinal, horizontal and diagonal ribbed plate, the role of cross-ribbed plate is best; for some thin-walled members, the honeycomb reinforced ribs are better. Third, to improve the local rigidity of the components   Machine tool guide and bracket connection parts are mostly weak local rigidity, but the connection method has a greater impact on the local rigidity.   Fourth, the choice of welded structure of the components   cnc machining center bed, pillars and other support parts from steel plates and sections welded together, with the significant advantages of reducing weight and improving rigidity. The modulus of elasticity of steel is about twice that of cast iron, with steel plate welding can make the member form a fully enclosed box structure, which is conducive to improving the stiffness of the member.

The formulation and use of aluminum cnc machining cutting fluid is basically the same as that of ordinary cutting fluid, but the selection of dilution water should be more strict. Because many aluminum ions in the water can have a corrosive effect, if the content of these ions is too high it will reduce the rust prevention performance of the cutting fluid, especially rusting between machining, such as chloride ions, sulfate ions and heavy metal ions.   In addition, certain ions will react with the rust inhibitor of the aluminum cutting fluid and reduce the rust resistance and stability of the cutting fluid, such as the occurrence of calcium and magnesium ions. So try to choose diluted water with less hardness, or diluted ion exchange water softening to ensure the cutting fluid's use effect and life. Aluminum cnc machining cutting fluid maintenance in addition to the daily maintenance of cutting fluid, but also need to pay attention to the following points.   1, filtration   Due to the stability of aluminum alloy aluminum soap reaction, the cutting fluid is easily damaged under alkaline conditions. Aluminum chips, aluminum shavings and cutting fluid should be filtered out immediately so that the reaction does not occur again and affect the use effect and life of the cutting fluid. The aluminum chips ground out during the grinding process are small and light, and it is difficult to continue to precipitate. If not filtered or not sufficiently filtered, the aluminum chips processing area will be taken away with the cutting fluid circulation system, while scratching the surface and affecting the gloss of the processed surface. 2、ph value   As the aluminum cutting fluid is very sensitive to ph value, therefore, the ph value of aluminum cutting fluid should be tested regularly and adjusted in time if abnormalities are found. Use ph control at 8-9 ph value to avoid excessive corrosion of the workpiece or ph value is too low to make bacteria multiply and affect the stability and performance of the cutting fluid.   3、Add new programs regularly   Not only ensure the good lubrication of cutting fluid, but also ensure the good antirust and anticorrosion performance of cutting fluid to prolong the service life of cutting fluid.

CNC lathe processing is a high-precision, high-efficiency automated machine tool with digital information to control the displacement of parts and tools mechanical processing methods. It is an effective way to solve the problems of changing varieties, small batches, complex shapes and high precision of aerospace product parts and other parts, and to achieve efficient automatic processing. In CNC lathe machining workpiece, there is generally a heat treatment process, the following points. First, prepare for heat treatment. The purpose of the preheat treatment is to improve the cutting performance of the trend, eliminate the residual stresses in the manufacturing era of CNC lathe machining blanks and improve the organization. Its process location is mostly before machining, commonly used in annealing, normalizing, etc. Second, the elimination of residual stress heat treatment. As the internal stress generated by the billet in the manufacturing and machining process will lead to deformation of the workpiece and affect the quality of processing, it is necessary to arrange the residual heat treatment. Heat treatment of residual stress should be arranged in the rough machining before finishing. For the parts with low precision requirements, the artificial aging and annealing of residual stresses are usually arranged before the billet enters the machining workshop. For complex castings with high accuracy requirements, usually arrange two aging treatments in the machining process: casting - rough machining - aging - semi-finishing - aging - finishing. For high-precision parts, such as precision steel wire, precision spindle, etc. Should be arranged for several times to eliminate residual stress heat treatment, or even cold treatment to stabilize the size.   Third, the final heat treatment. The purpose of the final heat treatment is to improve the strength, surface hardness and wear resistance of the parts, usually arranged in the finishing process (grinding process) before. Commonly used are quenching, carburizing, nitriding, carbonitriding.

The standards of the precision parts machining industry are very strict and there are different processes such as cut-in and cut-out. Dimensions can also vary depending on the product, and machining accuracy requirements can also vary. In general, precision machining is required to a high degree of accuracy, sometimes down to micron differences of less than 1mm. If there is a large dimensional variation, the product becomes scrap and needs to be reworked to meet the requirements, a time-consuming and labor-intensive process. Sometimes it will make all the raw materials scrap, resulting in increased costs, and at the same time the parts are bound to be unusable, so there are many requirements for precision parts machining.   (1) Usually, because the cutting volume, heat generation and cutting force of the part are different for the part roughness and precision, in order to ensure the machining accuracy of the part, so the rough parts and precision machined parts must be processed separately. If rough machining and precision machining are carried out continuously, the precision of the precision machined parts will be lost because of the difference in stress.   (2) The reasonableness of equipment selection. The processing of rough parts does not require high machining accuracy, but mainly reduces the machining allowance, so precision machining requires very high precision machine tools. In the processing route of precision parts, heat treatment process is often arranged. The location of the heat treatment process is arranged as follows: In order to improve the cutting performance of the metal, such as annealing, normalizing, tempering, etc., it is generally arranged to be carried out before the machining of mechanical parts.   (3) In general, almost all precision parts processing has a heat treatment process, which can improve the cutting performance of the metal. Precision parts processing and manufacturing requires not only the accuracy and stability of the machine tool and the accuracy of the tool and fixture to ensure, but also requires precision measuring instruments for calibration and measurement. Some are in the process of processing, and some are after the inspection. A fire two forging parts of a large number of hot forging forming and warm forging finishing process is the appearance of raw materials directly changed to semi-specific products or different products, the process is called process, but also the parts of the processing process benchmark, processing precision parts of the process is more complex, precision parts of the processing process standards can be divided into different categories according to the process of casting, forging, stamping, welding, heat treatment, machining, assembly, etc. .   Precision parts machining process often refers to the whole parts CNC machining and machine assembly process in general, while other processes such as cleaning, inspection, equipment maintenance, oil seals, etc., turning methods change the surface properties of raw materials or semi-products, this one process is called CNC machining, corresponding to the middle of the tool trajectory with differences in the form of switching, precision parts system are equipped with linear and circular interpolation function.

We all know that grooving is a more complex machining process in the cnc machining process, and the main thing to understand about grooving is the type of grooving. What are the common types of grooves? It is mainly divided into external groove, internal hole groove and end groove. Although the difficulty of groove processing is high, but shenzhen cnc machining factory reasonable operation of the machining center, then you can effectively complete the groove processing, before this must understand the type of groove processing. What is grooving? Grooving is practically all cutting of tools, whether they are made of metal or non-metal tools, whether the workpiece is rotated or the tool is rotated in a machining mode, as long as the groove is removed from the workpiece using a grooved tool, it can be called grooving.   External groove machining is the easiest, and the machining form of external groove cutting is easy to evacuate chips under the action of love gravity and cooling. In addition, external circular groove machining can complete the lesson for the operator, who can directly check the quality of the relatively simple machining. However, it is also important to avoid potential obstacles in workpiece design or clamping.   However, when performing internal hole grooving, the tool blade is positioned slightly above the centerline to achieve the best machining results. When machining endface grooving special, the tool must move in the direction of the axis, and the back tool radius must be consistent with the machining radius. End face grooving tool tip position slightly higher than the center line when the best processing results. In any groove processing, cnc machining center model design and technical conditions are also the basic elements that need to be considered. cnc machining center's main performance is as follows: 1, with a strong enough machining efficiency, a high-speed spindle can ensure that the tool runs in the correct speed range and does not drop speed or jitter.   2, CNC machining center must be required to have a high enough rigidity to complete the required cutting process, will not chatter caused by the surface finish of the workpiece damage.   3, CNC machining center needs a high enough coolant pressure and flow rate to help chip removal machining center spindle center out of the water function design can meet this processing requirements.   CNC machining center in a large number of slot processing, must pay attention to the choice of tools. Hong Wisheng precision technology recommends the use of forming tools. The disadvantage of non-blade forming tools is that if one of them breaks or wears out more quickly, the entire tool must be replaced, substantially reducing machining efficiency and affecting machining accuracy. Forming tools can cut off all or most of the groove shape with a single grooving process, vacating the tool and condensing the cycle time of the process. In fact, the design and machining process of a single-round program for slot machining is not particularly difficult. The complication is the irregular shape of the workpiece and the consequent continuous testing to achieve the difference in processing method applied to the proper selection of tools is able to complete the cutting process efficiently.

For the mechanical industry, the substance they come into contact with most often is a series of parts and components. No matter which style or type, they are more or less familiar and know it. Which parts are used in which structure or which application position, the staff of the relevant industry knows it by heart. However, no matter which configuration is used, it needs to go through certain processing steps before it can be implemented in a specific mechanical device. Therefore, professionals call this step precision parts machining. There are many ways to process precision parts, such as heat treatment methods. A part, a single non-detachable part of a machine, is a basic component of a machine and a basic unit in the mechanical manufacturing process. Its manufacturing process generally does not require assembly processes. Such as bushings, shingles, nuts, crankshafts, blades, gears, cams, connecting rod body, connecting rod head, etc.   A, precision parts cutting processing. There are mainly precision turning, mirror grinding and grinding, etc. In the precision lathe with fine grinding single crystal diamond turning tool to hold micro-turning, cutting thickness of only about 1 micron, commonly used in the processing of non-ferrous metal materials such as spherical, aspheric and flat reflective mirrors and other high-precision, highly polished appearance of the parts.   Second, precision parts processing. Precision parts processing accuracy to nanometers, and even finally to the atomic unit (atomic lattice distance of 0.1 to 0.2 nanometers) as the goal, ultra-precision parts cutting and processing methods can no longer adapt, it is necessary to resort to special precision parts processing methods, that is, the application of chemical energy, electrochemical energy, heat or electricity, etc., so that these energies beyond the joint energy between atoms, so as to remove part of the workpiece appearance of inter-atomic adhesion, The method of ultra-precision machining is achieved by applying chemical, electrochemical, thermal or electrical energy, etc., so that these energies exceed the inter-atomic union energy, thus removing part of the inter-atomic adhesion, union or lattice deformation of the workpiece exterior. This type of processing includes mechanical chemical polishing, ion sputtering and ion implantation, electron beam exposure, laser beam processing, metal vapor deposition and molecular beam epitaxy, etc.

CNC machining core does not spill the phenomenon of key components not assembled well, we used to be in the application of CNC machine tools machine tools in addition to pick some stronger cnc machining manufacturer in order to better be able to better quality assurance, but also must let the technical assembling staff to undertake assembling, and thus be better able to ensure its smooth operation. The customer also has to check whether the pipeline is blocked, if it is the word to apply the cleaner to blow the drain. The water storage tank is relatively low. CNC machining core often does not sprinkle water is due to the gas inside the centrifugal water pump, the gas discharged from the pump can guarantee that it can all normal sprinkle water; compared with other difficulties, this problem is very easy to deal with relativity.   CNC high precision parts CNC lathe processing, usually is to increase the cohesion of the hazards, with CNC lathe three jaws or four jaws chuck twist tight parts, and subsequently terminate the mechanical parts processing. At the same time to make the clamping force above the mechanical equipment cutting speed to ensure that the parts do not loosen and reduce the nominal diameter force... The clamping force expands with the increase in cutting speed, and then decreases. cnc machining manufacturer this type of work ability to make mechanical parts in the processing of the whole process smooth. Unbeknownst to us, after the three-jaw or four-jaw chuck release, the machined parts will have a large difference from the original, some occur irregular graphics, some occur elliptical type, mainly showing a relatively large error.