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

When programming CNC lathes, it is very important to choose the correct CNC tool. cnc CNC lathe machining tool's general requirements are easy installation and adjustment, good rigidity, high precision and durability. On this basis, the cutting performance of the workpiece material, the processing capacity of the machine tool, the type of CNC machining program, cutting parameters and many factors related to the working range of the machine tool and CNC device are taken into account. In selecting the type and specification of the tool, the influence of the following factors is taken into account.   (1) Nature of production   The nature of production in this context refers to the batch size of the part, and the impact on tool selection is considered mainly in terms of machining costs. For example, the use of special tools in mass production may be cost-effective, while in single or small batch production, the choice of standard tools is more suitable.   (2) Machine type   The influence of the CNC machine tool used to complete the process on the type of tool selected (drill, turning tool or milling tool). Under the condition of being able to ensure good rigidity of the workpiece system and tool system, it is allowed to use high productivity tools, such as high-speed cutting turning tools and large feed turning tools.   (3) CNC machining program   Different CNC machining programs can use different types of tools. For example, the hole processing can be used to drill and reaming drill, but also available to drill and boring tool to process. (4) the size and shape of the workpiece   The size and shape of the workpiece also affects the choice of tool type and specifications, such as special surfaces to use special tools to process.   (5) Surface roughness   Surface roughness affects the structure of the tool shape and cutting amount, for example, rough milling of blanks, coarse-tooth milling cutters can be used, fine milling with fine tooth milling cutters.   (6) Machining accuracy   Machining accuracy affects the type and structure shape of the finishing tool, for example, the post-processing of the hole according to the accuracy of the hole available drill, reaming drill, reamer or boring tool to process.   (7) Workpiece material   Workpiece material will determine the choice of tool material and cutting part geometric parameters, tool material and workpiece machining accuracy, material hardness and other related.

Shenzhen fine parts processing technology touches a wide range, here only from the possibility and convenience of processing two aspects to analyze. Mainly, the size data on the part processing drawing should be in line with the programming convenience criteria, the conditions of the geometric elements that constitute the part outline should be sufficient  (1) the dimensional labeling method on the part drawing should comply with the characteristics of CNC machining in the fine parts processing diagram, should be the same benchmark cited dimensions or directly give the coordinate dimensions.   1. This labeling method is not only convenient for programming, but also convenient for the mutual harmony between dimensions, in adhering to the design benchmark, process benchmark, testing benchmark and programming origin set divergence brings great convenience.   2. Because the parts designers generally in the size of the labeling more thinking about the assembly and other characteristics of the use, and had to use part of the scattered labeling method, which will bring a lot of inconvenience to the process layout and CNC machining.   3. Because of the fine parts processing accuracy and repeated positioning accuracy are very high, will not produce a large accumulation of errors and ruin the use of characteristics, and therefore can be part of the scattered labeling method to the same benchmark cited size or directly give the coordinate size of the labeling method. (2) in manual programming to calculate the base point or node coordinates. In the automatic programming, fine parts processing to constitute the part profile of all geometric elements to stop the definition. Therefore, in the analysis of the part diagram, to analyze the geometric elements of the given conditions can be sufficient.   For example, arc and line, arc and arc tangent on the drawing, but based on the dimensions given on the drawing, in the calculation of the tangent conditions, into the intersection or away from the state. Due to the constitution of fine parts processing parts geometric elements of the conditions are not sufficient, so that the programming can not start. When encountering this condition, it should be handled in consultation with the part designer.

Aluminum alloy in the air is extremely unstable, easy to generate the naked eye difficult to identify the oxide film. Shenzhen cnc processing plant due to the different methods of aluminum cnc processing, such as casting molding, forging, extrusion or CNC precision machining, or through different processes molding and then through heat treatment or welding, the surface of the workpiece will show different states, different degrees of dirt true or traces, pretreatment according to the workpiece surface selection method. 1. CNC machining parts before anodizing need to pay attention to the problem: Although CNC machining aluminum parts surface exists oxide film time is not long, relatively easy to remove, but greasy heavy, especially in and around the eyelet (machine processing process requires lubrication and added), such workpiece must first be cleaned with organic solvents, if the direct use of alkali wash not only greasy heavy in addition to clean , and fine machining of the surface can not withstand a long time alkali corrosion The result will also affect the roughness of the surface of the workpiece and the resistance of the tie, and may eventually become scrap. 2. Casting before the problems that arise in the process of processing. Casting molding parts are not all the surface is machined, unmachined surface left castings formed in the processing there is a very thick oxide layer, some clips and sand layer, the first should first use mechanical processing or sandblasting method to remove the original oxide film of this part first, or by alkali washing after processing again, so that not only can remove the original oxide layer of the unmachined parts, but also to avoid machine processing parts tolerance size change. 3. heat treatment or welding process after the workpiece in the pretreatment process needs attention: according to the process requirements, the workpiece into the heat treatment or welding process before the need to clean with organic solvents, except for the net surface oil, but at present is generally not that, so the surface of the workpiece formed a layer of oil burn tar, this layer of tar in organic solvents is to be purged, if immersed in alkali solution will cause local corrosion, produce pockmarks or cause unevenness, seriously affecting product quality. I use concentrated nitric acid immersion method for soft tarring, and soft tarred material is slightly cleaned in alkaline solution after cleaning. Some specific methods are as follows.   ① Organic solvent degreasing. Less oil serious can be immersed in solvent for a short time; serious application of cotton cloth dipped in solvent to wipe the oil, or scrub with a pig bristle brush. Operation should be safe, and the residual solvent should be properly stored after use.   ② Drying. Regardless of organic solvent cleaning, the drying process can not be omitted, otherwise the meaning of cleaning will be lost.   ③Tying. Tie material is suitable for aluminum wire, banned copper wire and galvanized iron wire, available back to the wire layer. Slightly larger single-sided binding consider the location of the tie, as far as possible, tied to the hole closest to the edge of the part to reduce the impact on the surface of the workpiece. Different types of workpieces should not be tied to a single string, because different compositions (grades) of alumina have different processing times. Pay attention to the direction of the strip artifact wobble and avoid nesting the concave part facing downward. Clean the oil from the surface of the workpiece.   ④Alkali cleaning.   ⑤ Water rinsing. It is best to rinse with hot water after washing, it is a good way to clean the alkaline material on the surface of the workpiece. There are blind holes, grooves to strengthen the position of the workpiece flush, and pour the residual liquid, and immediately turn over nitric acid glow, so as not to suffer from oxidation.   (6) nitric acid. If it is mixed aluminum, cast aluminum or 50mL / L should be added to hydrofluoric acid according to this formula to speed up the removal of aluminum surface insoluble material when attached to the alkali. 2, the technical requirements of the oxide film formation process (1) Oxidation. Solution composition and working conditions. Immediately after pretreatment, transfer to the oxidation process to prevent the workpiece from staying in the atmosphere for too long and producing a primary oxide layer and affecting the quality of the oxide layer. Soaking in water is better than being exposed to the atmosphere again, but it should not be soaked for too long, if immersed in 3% dilute nitric acid soaked L5 ~ 30min will continue to oxidation, but if the time is too long to produce will have an impact on the film, especially the old nitric acid containing impurities such as copper. The oxidation temperature of the solution is a key process, the solution temperature is too high, film speed, easy to make the oxide film chalking; solution temperature is too low, the film coating speed is slow, resulting in the coating film depth is not uniform, poor adhesion. To achieve a consistent color on the surface of the same aluminum, it should be treated at the same temperature at the same time. Within a certain range, temperature and time are inversely proportional, that is, the higher the temperature the shorter the time required, and vice versa the longer the time required. High purity aluminum oxide requires longer processing time. Insufficient oxidation processing time, the oxide film is too pale; the purity of aluminum and oxidation reduction or aging of the oxide film, or even affect the electrical conductivity of the film. In order to obtain uniform film color, the solution of oxidation of small pieces of rock, you can use a large mixed solution, or static (not mixed solution, do not shake the workpiece), to prevent the edge of the workpiece and the solution switch over the center of the workpiece, the film color is not uniform. (2) washing cycle water. For blind holes, the workpiece will be cut, strengthen the parts of the washing, residual solution in the net dumping, to prevent oxidation solution out of oxidation damage. (3)Self-inspection. After washing circulating water, the workpiece should be seen from the quality, and if defects are found in the alkaline solution, return after slight oxidation. Removal, repair, stripping after drying is more difficult and more likely to damage the substrate. (4) Drying. Drying is the key to maintain the quality, shake the workpiece surface free water before oxidation in the drying process, and then in the sun. Can also be baked in 45 ~ 50 ℃ drying conditions, the temperature should not be too high to avoid scorching, aging, cracking, the appearance of old color. 3、Large area chlorination (1) Unit. Based on the shape size of the oxidation (appropriate relaxation margin), make a box with wood or bricks, cover the box with plastic sheet to form a concave pool, the height if the plate, about 100MM operation only need to shake this pool on the workpiece, so that the surface of the oxide film. (2) Parts. Implementation of the parts in the work tank (pool) in different parts of the rapid change or rotation, and finally the entire surface of the workpiece with the solution many times in contact and gradually form a thicker oxide film method. The above two methods, can be prepared from the production of large baths, a large number of solutions to reduce the waste caused by the long-term use of less, and does not occupy the workshop in the production area. 4, oxide film coloring uneven three possible causes (1) The workpiece area is too large, the swing of the operation in the bath is too large, the edge is in contact with the central spot, large update, exchange differences, resulting in inconsistent film color... Preventive measures: oxidation workpiece oscillation is small, static electricity can be, but when the temperature is too low, easy to appear graphical spots, appear unnatural. (2) aluminum processing part of the aluminum layer was destroyed, was cut off, aluminum outer packaging is high-quality aluminum, the inner layer of closed aluminum mixed, two kinds of aluminum is different, so the oxidation appears "good wind" spot. Customers often do not understand this phenomenon, manufacturers should do more work to explain the reasons and ways to avoid misunderstanding.   (3) business aspects. ① parts alkali etching process is not complete, the original film, at the local dirt can not be removed.   ② alkali corrosion immediately after the treatment is not light, the surface is alkaline.   (3) workpiece in the transfer process contact with foreign objects.   These factors are important for the manufacture of high-quality anodized aluminum processing parts, find the causes of uneven coating color and take measures to solve them. 5, oxidation around the hole is more difficult to form oxide film mainly for two reasons.   (1) Thoroughly rinse the workpiece after cleaning. When rinsing the lye into the hole, it fails to wash the oxidation out of the hole, thus corroding the perforation around the film.   (2) grease around the hole of the workpiece. Aluminum self-tapping screw hole is very astringent, operators often use butter, lye to lubricate when the lack of emulsifier, butter is difficult to remove.   Solution: (1) Wash again with gasoline before alkaline washing, the washing solution should be added to the emulsifier.   (3) workpiece wash after alkali wash.   6、Four points should be noted in the post-treatment procedure   (1) Hot water rinse. Hot water is aimed at aging film. However, the temperature and time must be strictly controlled, the water temperature is too high to reduce the thickness of the paint film, the color fades. Similar problems can occur when the processing time is too long. The appropriate temperature and time are   Temperature 40～50℃ Time 0.5~1MIN.   (2) Drying. Drying to natural drying is good, wash with hot water hanging on the workpiece shelf and let the free water flow vertically downward on the working surface. Use a towel to flow the water droplets to the lower corner, and according to this method of coating dry color is not affected, appear natural.   (3) Aging process. Aging method can be based on climatic conditions, summer can be exposed to sunlight, wet weather or winter available oven baking process conditions are   Temperature 40~50℃ 10~15min.

When turning slender shafts in the field of precision parts processing, the rigidity of the work body itself is poor, and if the auxiliary tools such as the center frame and the follow tool holder are not adjusted properly, the geometry and surface quality will not reach the requirements, thus leading to bending. The workpiece has a large diameter and poor rigidity; the radial cutting force and centrifugal force during turning, the workpiece produces thermal deformation elongation and cutting stress; the blank material itself is a deformed rod and other reasons, which can cause the workpiece to bend.   The solution is to use the center frame, follow the tool holder, increase the rigidity of the workpiece; reasonable selection of the geometric angle of the tool (mainly large front angle, large main deviation angle), reduce the radial cutting force, reduce the generation of cutting heat; the use of spring top, reduce the adverse effects of the workpiece line expansion, fully pour cutting fluid, reduce friction and quickly take away the heat generated, the necessary heat treatment of the blank or workpiece. In the process of precision parts processing if the blank material itself or processing bending, should be timely straightening before continuing turning. Specifically according to the need to choose hot forging straightening, cold pressing correction, counter-strike method correction, counter-strike method straightening, pry hit straightening, simple tool straightening, quenching straightening, anti-torsional groove straightening and other appropriate methods.

In the Shenzhen precision parts machining process factors affecting the surface roughness are mainly cutting dosage, tool geometry parameters and so on. Want to improve the need to start from these aspects: 1. cutting amount   The larger the feed, the higher the height of the residual area, the rougher the surface of the part. Therefore, reducing the feed amount can effectively reduce the surface roughness value.   The effect of cutting speed on surface roughness is also great. When cutting elastomeric materials at medium speed, the surface roughness value of the machined parts is large because of the easy generation of chip accumulation and large plastic deformation. Usually use low speed or high speed cutting elastomeric materials, can effectively avoid the generation of chip tumor, which has a positive effect on reducing the surface roughness value. 2. Tool geometry parameters   In the machining of precision parts, the main deviation angle, sub-deviation angle and the radius of the tool tip arc have a direct impact on the surface roughness of the parts. In the case of a certain feed, reducing the main and sub-deflection angles or increasing the radius of the tool tip arc can reduce the surface roughness value. In addition, appropriately increasing the front and rear angles can reduce the cutting deformation and friction between the front and rear tool faces, and inhibit the generation of tumor chips, which can also reduce the surface roughness value. After solving these problems, the surface roughness problem can be greatly reduced.

Shenzhen cnc machining generally refers to computer digital control precision machining, mainly used in the processing of precision hardware parts. Here to understand the different guide rails in the next cnc machining have what advantages? A, liquid hydrostatic guide of the two guide operating surface of the question open oil cavity, pass into the lubricant with a certain pressure, can constitute a hydrostatic oil film, so that the guide operating surface in pure liquid conflict, no wear and tear, good precision adherence; at the same time, no certain pressure of the lubricant, can constitute a hydrostatic oil film, so that the guide operating surface to keep clean, good impact resistance. Hydrostatic guide can be divided into liquid hydrostatic guide and gas hydrostatic guide.   Second, the slide rail guide has the advantages of simple structure, easy manufacturing, high stiffness, high vibration resistance. Polytetrafluoroethylene guide soft tape and epoxy wear-resistant guide coating commonly used guide plastic. The paste plastic slider is characterized by good impulse performance, good wear resistance, smooth movement, vibration damping performance and craftsmanship. Third, the tumbling guide is the ball, roller, needle and other tumbling body placed between the guide surface, so that the sliding conflict between the guide surface into a rolling conflict. Relative to the sliding guide, the advantages of tumbling guide is: high activity, and its dynamic conflict coefficient and static conflict coefficient difference is very small, so at low speed movement, not easy to present creeping phenomenon; (high positioning accuracy, repeat positioning accuracy, small wear, low precision requirements, easy to wear), low precision requirements, long life. However, the rolling guide has poor anti-vibration performance and high requirements for protection.

Many companies need custom high precision parts machining services for newly developed products, and make models to verify them during the development process. High-precision parts machining customization is mainly used to test the rationality of the product structure, as well as the use of experience. Aluminum parts processing, stainless steel processing products for the accuracy of the requirements are very high, but how to choose the error is small high-precision parts processing, for customers is a test. We know that only professional high-precision parts processing, the production of aluminum parts processing or stainless steel processing, or copper products processing, not only high precision, but also small errors. Only this kind of service can make the development of new products can be perfected, in order to seize the opportunity in the market competition. For high precision requirements of aluminum parts processing, or stainless steel processing, customers should look for a high-precision parts processing custom manufacturers with advanced equipment, technical excellence that is a must. In the current high-precision parts processing custom suppliers, many families are choosing ordinary processing equipment, stainless steel processing, aluminum processing accuracy is imaginable. And our precision up to 0.01mm, is because the use of five-axis machine processing, which is a lot of small factories can not afford to invest in equipment.

CNC lathe is very common in the field of CNC machining center, its production and processing of high efficiency, the actual operation is simple, not only can save a lot of human resources, more critical is able to enhance the production and processing of high efficiency. I think some basin friends have encountered: cnc CNC lathe temperature is too high, what is the actual cause of the situation? The following cnc lathe processing factory Xiaobian will give you guys a wave of analysis it! On the one hand, the mechanical parts of the abnormal destruction and pipeline blockage and other difficult problems will produce the corresponding position of the temperature rise. Therefore, cnc cnc lathe processing plant cnc lathe temperature can be a reference element of the evaluation of cnc lathe; on the other hand, the role of mechanical parts and temperature has a close contact, the temperature is too high, will make the role of parts to reduce, and even continue to produce parts of the ablation, therefore, the temperature is also a key element of the common failure of industrial equipment caused by column cnc cnc lathe.   Therefore , temperature detection in industrial equipment failure detection occupies a very critical influence. To put it bluntly, temperature detection is the application of a variety of temperature measuring instruments and equipment, measuring the temperature of machinery and equipment equipment, and all normal operation of machinery and equipment temperature to carry out a comparison, and then diagnose the parts that cause common failures and the level of destruction.   In the column type cnc lathe industrial equipment fault detection and detection, temperature measurement can be divided into two categories of touch temperature measurement Wen non-touch temperature measurement. Touch temperature measurement has the characteristics of rapid, appropriate and convenient, so it is commonly used in various industrial production ranges. The purpose of cnc cnc lathe slide bearing setting is to limit the work of the generator set spindle bearing so that it only bears the axial load on the generator set spindle bearing in a specific slide bearing clearance range.   A, the bearing temperature rises for the reason   1. shaft ground tile surface point contact is small, the surface is not enough, does not match the machine and equipment specifications.   2. bearing clearance of the lift far more than the design program clearance, resulting in grease into the bearing roof tile is not easy to produce oil wedge, resulting in poor wetting, resulting in the guiding bearing temperature rise, the generator set vibration expansion.   Second, the solution of the guiding bearing temperature rise   When wetting the surface of the tile, even according to the spindle bearing shaking point, although the pairing gap is the least, but because of the short spacing, wetting standards are good, friction caused by less heat, cooling effect is very good, generally not easy to cause the bearing heating condition, will not cause the tile ignition.

The cnc machining quality is stable, with high machining accuracy and high repeatability, and it is adapted to the machining requirements of the aircraft. High production efficiency in the case of multi-species and small batch production, can reduce the time of production preparation, machine tool adjustment and process inspection, and reduce the cutting time due to the use of optimal cutting volume. The following are the causes and improvements of chipping in Beijing cnc machining. Feeding too fast   -Slow down to a suitable feed rate   Feeding too fast at the beginning of cutting   -Slow down the feed rate at the beginning of cutting   Loose clamping (tool)   -Clamping   Loose clamping (workpiece)   -Clamping Insufficient rigidity (tool)   -Use the shortest allowable tool, clamp the shank deeper, and try smooth milling.   Cutting edge of the tool is too sharp   -Change the fragile cutting edge angle, one edge   Insufficient rigidity of the machine and toolholder   -Use a rigid machine and toolholder

The production of the manufacturer has a relationship with machinery and equipment, with the help of machinery, our workload, effect, and speed are much faster. Although it is said that there is the help of machinery and equipment, but the face of the customer's quality requirements for the product so high. Natural in the processing process of high precision requirements, such as precision parts processing.   Digital program-controlled contouring systems are widely used on milling machines when precision parts are machined, including simple, reliable and inexpensive phase systems with a wide range of process capabilities. These systems are used in many factories, especially for controlling precision parts machined in large three-dimensional profiles.   Correctly programmed control is one of the main conditions to ensure the quality of machining of precision parts. For digital program-controlled phasing systems, the preparation of the control program is carried out by the use of an automatic program preparation system, the level of quality of which depends to a large extent on the price of preparing the control program. Others are the processing errors that arise when manually controlling the equipment, and these include accidental and systematic errors of the process system. All processing errors in the system error plays a major role, for precision parts processing as a whole, will cause a series of CNC process system errors.   For example, the gap, the consequences as the machine tool drive chain insensitive belt, but does not include the reverse drive chain gap; the amplification factor of the unstable drive; phase error in the control program tape; . Periodic stepping instability of the sensor feedback, the main form of which is the phase form of instability.