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

The process of CNC machining depends on the precision to a large extent. However, no CNC machine has absolute accuracy. Differences due to material factors or processing techniques used. Therefore, at Weimeite, we assign specific part tolerances to all CNC machining processes during the design process. Machining tolerance is the allowable deviation of part size. It is also called dimensional accuracy. It has minimum and maximum size limits. Any part size falling within these limits shall meet the tolerance requirements. Importance of CNC machining tolerance Most manufacturers refuse to start manufacturing parts until all features have well-defined tolerances. This is because it is the reference point for understanding how a part interacts with other parts. Lack of information limits our understanding of the final design. Therefore, the chance of obtaining inaccuracy is higher. For example, consider a shaft that fits the part design. The part has a hole of a specific diameter for the exact installation of the shaft in it. If the hole is smaller than the shaft size, it does not fit the shaft. The following are possibilities for providing or not providing tolerances. Provide tolerances. We will start the project immediately. This is because we know the required size limits. As a result, it shortens delivery times and minimizes costs. No tolerance provided. At Wilmet y, we decided to use standard tolerances. For example, ± 0.01mm for parts. Indicates that the diameter of the part will increase or decrease. If it reaches a tolerance lower than this limit, it needs to be CNC machined again. This only increases turnaround time and costs. Factors Affecting CNC Machining Tolerance Material Science Materials behave differently under stress. In addition, some materials are easier to use than others. Details of material properties shall be taken into account when determining tolerances. These characteristics affect the processing ability of materials. Here are some material properties: Thermal stability: non-metallic materials, such as plastics, will warp when heated. This limits the range of processing processes to be used because we have to take heat into account. Taking this into account will keep tolerances within acceptable limits. Abrasivity: It is difficult to process highly abrasive materials. Examples of such materials include phenolic resins and glass laminates. They can cause tool wear, which can lead to errors in machining. Stiffness and hardness: Flexible and soft materials can vary in size. This makes it more difficult to process them. Examples of such materials include: foam, polyisocyanurate and polyurethane Processing type CNC machining methods significantly affect the possible tolerances of finished parts. Some processes may be more accurate than others. Rail cutting: This process involves manual operation of the rail saw. Because of its manual characteristics, it requires a larger tolerance zone. This will result in better accuracy. Shear cutting: This process involves applying sufficient force to cause material failure. We often use a set of blades or punches and dies. Therefore, it is not applicable to brittle or soft materials. Because they are easy to warp and break under the action of great force. Therefore, it cannot maintain a tighter tolerance of less than ± 0.015 ". CNC screw processing: This process uses a disc cam to feed the workpiece. Since the part moves rather than the tool moves, there is less vibration and deflection of the part. This allows higher achievable accuracy. We recommend using it to process phenolic, foam, plastic parts and other materials. Steel rule die-cutting: This process uses custom die punches to create specific shapes. However, it does not apply to fragile or soft materials.

We provide 3-axis and 5-axis CNC machining. Optical parts are becoming more and more complex, so they need to be handled. The following is a new era of optical precision processing. There are several common methods for creating non complex optical components. It requires polishing and normal grinding procedures. However, we can only partially create complex optical components using these conventional methods. This is because they lack dimensional accuracy. In this case, our expert team chose to use multi axis machining. Micro and aspherical optical components usually require very strict tolerances. Fortunately, the precision cutting process provides the required precision. They use diamond tools on ultra precision tools to achieve this goal. Therefore, we finally obtained strict tolerance and high surface finish. We use this method to achieve the proper dimensional accuracy of optical parts and their molds. This is a further insight. What are the ultra precision production methods for optical components? There is an ideal method for manufacturing complex micro optical components. This is to achieve the first-class surface quality of a fraction of a micron Ra at the same time. It requires the use of ultra precision tools and diamond cutting machines. Obtaining freeform surfaces, complex geometry, and real 3D parts requires top level expertise. We sometimes have to use some unique multi axis machining methods. There are few methods used by machinists in optical precision machining. These include laser processing, EDM, grinding, micro cutting and silicon etching. Optical processing needs to be carried out on the optical surface of plane and free surface. Micro cutting is the only way to achieve the required structure size, accuracy and precision on both optical surfaces. What are the tool factors of optical precision machining? Two main factors determine the production quality of optical parts. These are the tool tip roundness and sharpness. Therefore, we must include special tool geometries. These include ball end mills, diamond micro end mills and other turning and forming tools. There are several ultra precision cutting methods for optical parts. They are flying cutter cutting, end mill cutting, cut in cutting and rapid tool cutting. Our expert team sometimes combines vibration free CNC machine tools with compact tool holders and fixtures. This allows a single point diamond cutting tool to effectively scrape material off the workpiece. This method ensures that very high and concentrated cutting forces are applied to the workpiece. As a result, we ended up with almost no dents elsewhere, while maintaining perfect shape accuracy and surface finish. This enables us to achieve optical precision machining. What is single point diamond tool turning? Optical precision machining When we want to obtain rotationally symmetric optical parts, we will apply this type of processing. It is one of the most effective cutting processes. This method achieves high cutting speed and high surface finish when Ra is less than 5. The tools we use in this method take into account the accuracy of parts in production. Our experts often calculate the tool radius and the compensation of the whole tool during the machining process. In addition, we must be very careful when dealing with precision in the submicron range. This involves controlling the waviness of the tool at 0.1 um of the tool radius. At the same time, if we need a simpler surface structure, we will use cut in cutting with pointed tools. These methods are helpful for us to realize optical precision machining. CNC milling CNC milling is a great choice for machining complex surface geometry. We sometimes use it to realize the surface treatment of free-form surfaces. Examples of optical components that we can manufacture include camera lenses and vehicle lighting prototypes. In processing these parts, we need at least a three-axis CNC machine tool. In contrast, we need a 5-axis machine to obtain accurate optical surface features. In this case, we used three main diamond CNC milling tools. They are end mills, flying cutter cutters and ball end mills. Ball end milling cutter is very important when dealing with freeform surface features. This is because they can handle geometry up to 0.5mm. Our professional processing services enable us to achieve internal angle accuracy up to R0.1-R0.15 mm. Flying cutting tool is the ideal choice for groove cutting. In addition, we can use them when working with planes. For example, we use it to process laser mirrors and pyramid parts. What is the key role of optical precision machining in the modern world? It is worth noting that the demand for optical components is at its peak. This is accompanied by a growing consumer market for electronic components. It is worth noting that camera lenses are used in digital SLR cameras, smartphones and printer scanning mirrors. This brings challenges to the market. The main problem is how to economically and efficiently produce free-form optical components. Fortunately, precision machining enables us to achieve this goal. We finally replaced the ordinary camera lens with a single free-form mirror part. This makes it compact and saves production costs.

Most manufacturers find themselves neglecting titanium alloys as raw materials. This is mainly due to its unique functions. The latest advances in technology and metallurgy enable us to look at titanium from another perspective. However, the use of titanium alloys will cause a series of problems. Fortunately, our team of experts in Vermeer is good at dealing with challenges. We provide good quality control for titanium alloy parts processed with high precision. The following guidelines will describe how we can achieve high-speed titanium processing. Titanium alloys provide a better weight to strength ratio than steel under ideal conditions. It also has strong corrosion resistance and is well matched with human tissues. In addition, it provides excellent performance even at very high temperatures. Its light weight and strength make it an ideal choice in the aerospace field. What are the most common types of titanium alloys? Due to the addition of elements, titanium alloys appear in different forms. These elements help to improve the function of titanium alloy parts. Titanium may change at temperatures above 800 degrees. Some elements will lower the temperature of the titanium used. We call them beta stabilizers. Some elements raise the temperature of the titanium used. We call these alpha stabilizers. We divided titanium alloys into four groups. This depends on the type of stabilizer present. Understanding the alloy variants you are working on is the key to cnc machining of high-speed titanium alloys. These groups are: Unalloyed titanium This refers only to the basic form of titanium. This unalloyed titanium form provides the best corrosion resistance. However, compared with other variants, its strength is lower. Alpha titanium alloy This type of titanium provides better creep resistance. Therefore, we use it for high temperature performance. α-β alloy This is the most diverse group because it provides great functionality. Existing α The components increase heat resistance, while β The components increase the strength. This mixture sometimes accounts for about 50% of the total titanium alloy market. β alloy It is the alloy group with the highest hardness at present. It is also denser than the previous alloy group. What are the reasons that limit high-speed titanium cnc machining? There are many reasons why titanium is difficult to machine. We will introduce them without further studying the mechanical principles of titanium grinding, milling or turning. The following are the key points for titanium to perform tasks on the machine. High speed titanium alloy processing First, titanium can maintain its great strength even at high temperatures. In addition, it can maintain resistance to plastic deformation even at high cutting speeds. Therefore, we finally used a larger cutting force different from that of steel. This will eventually damage high-speed titanium processing. Secondly, its chips are very thin after forming. Therefore, the contact area between the tool and the chip is ultimately 3 times smaller than that of steel. Therefore, the tip of the tool eventually bears most of the cutting force. Third, titanium alloys usually have higher friction coefficients than most cutting tools. We finally had to increase the cutting force and temperature. Therefore, this limits high-speed titanium processing. Fourth, titanium sometimes reacts with tool materials at temperatures above 500 degrees. It also tends to self ignite when cutting after high temperatures have accumulated. Therefore, we will eventually use coolant when cutting titanium alloy. The time taken by this process will interfere with high-speed titanium processing. Fifth, most of the heat generated in the cutting process enters the cutting process. This is due to the very thin chip and low contact area. This will eventually reduce its life. We eventually use high pressure coolant to prevent heat build-up.

Medical components are essential for countries with an ageing population. In addition, the growth of the industry is affected by rising health costs and technological progress. Importance of medical parts Medical components are mainly helpful to improve surgical results. These have had a real impact on people's lives. The market for the medical sector has been rising. More and more customers seek our help in medical parts processing, and we will not let them down. As the market grows, we strive to improve product features, our business model and customer service. However, there are some problems when keeping up with the latest technology while reducing costs. Understand cnc processing medical precision parts Medical machining is both a definition and a work. It needs to process medical parts with ultra-high precision. We use numerical control machine tools to achieve this goal. They enable us to process highly complex medical parts. These are essential for the production of medical devices. The first can easily handle conventional processes such as turning, boring, drilling, boring, milling and knurling. Then, we can carry out deep hole drilling, broaching, threading and other special processes. They don't need to set it up many times to achieve this goal. Using cnc machine tools, we can cnc machining micro screws and precision surgical parts. Medical parts often require strict tolerances and are often complex. We sometimes face the pressure of machining smaller parts. Therefore, this means that we must keep up with the latest developments in micro machining. Multi tool and multi axis machine tools enable us to improve cnc machining of medical parts. They shorten cycle time because we can process all features on one machine. Medical parts Medical units have highly complex machined parts. Its complex components are essential for the safe implementation of the device. Designing and processing them requires first-class creativity. Fortunately, we are good at processing high-quality medical precision parts. Examples of medical components are clamps, screws, locking plates, and surgical needles. Before each project, we first consult our component suppliers. This allows us to determine tolerances that are more stringent than normal. Then, we continue to work on the design process to save time and effort. Tolerance requirements for medical parts We have multi spindle and CNC lathes for our use. This allows us to machine medical parts with a tolerance of more or less 0.01 mm. In addition, our customers can choose a range of surface treatments. The surface treatment thickness of the machine can reach 8 microns. In addition, we can use our professional programming and Y-axis machining to produce complex geometric shapes. These functions are very suitable for customers with strict size and finishing requirements. Regardless of the complexity, our professional level is competent for this task. What makes us a capable cnc workshop for medical parts? Cnc machining of medical parts needs high precision and reliability. Therefore, it needs to be processed by a professional medical cnc workshop. Our experts can easily undertake the task. They first try to provide the highest possible consistency and accuracy. This is to work in a strictly controlled and safe environment. Whether large or small batches, we intend to maintain appropriate repeatability. Fortunately, we easily achieved this goal with an optimized short cycle process. In addition, they enable us to reduce the waste of cnc processing medical parts. In addition, we have preventive maintenance and strict tool planning to avoid any delay. We further use online production to reduce costs and maintain quality. This enables us to produce any number of medical components quickly and cheaply. We also provide high-quality CNC cutting tools. They can handle a range of special materials that occur when handling medical parts. Examples of these materials are nickel, titanium, cobalt chromium alloys and stainless steel. Use Swiss turning milling compound CNC to process and produce medical parts The complexity and delicacy of medical parts determine professional CNC coding and engineering. This ensures the highest accuracy to meet the standards set by the customer. A Swiss CNC machine tool processes the bushing. This ensures that the cutting tool is never too far from the workpiece. You may wonder why this is important. It reduces any errors caused by distance deflection. This is critical when handling slender medical components. In addition, it can help us deal with small, fine parts. Its speed and efficiency allow for fast and flexible responses. This ensures repeatability regardless of volume. As a prototyping method, CNC machining can speed up the whole process. We further combine it with precision grinding to enable us to respond to customer needs.

Along with the transformation and upgrading of China's economic structure, the investment in high-tech research and development has gradually increased, followed by the emergence of a large number of plants and laboratories containing precision instruments or equipment. However, the vibration caused by urban construction and urban traffic has an unavoidable impact on the building facilities and precision instruments, causing widespread concern in the construction industry. Vibration reduction and isolation technology is currently the main effective means of vibration protection for precision instruments and equipment. The concept of ultra-precision machining technology was really put forward systematically in China from the 1980s to the early 1990s. As the development of military industries such as aviation and aerospace put forward higher requirements on the machining accuracy and surface quality of components, these military industries invested funds to support the research institutes and universities in the industry to start the basic research on ultra-precision machining technology. As the ultra-precision machining technology belonged to military technology at that time, foreign countries implemented technology embargo in terms of equipment or process, so the development of domestic ultra-precision machining technology basically started from the research of ultra-precision machining equipment. Ultra-precision machining technology also plays a big role, artificial joints using titanium alloy or other precious metal materials, the surface treatment of these high-precision parts have extremely high requirements for cleanliness, finish and surface roughness, the need for ultra-precision grinding and polishing, the shape should be customized according to the individual body structure, expensive abroad, while there is a large gap in terms of service life and safety in China.

CNC precision parts processing in the industry is still relatively wide, why would say so, in fact, we can see in life, the role of obvious, in some mechanical equipment above the application will also be more, to know the CNC precision parts processing precision machining requirements are also high, why, because the customer in the demand for quality, and this CNC precision parts processing itself, the advantages of large, so we need to do better, more customer trust, this is what CNC precision parts processing needs to do. So we have to do better, more customer trust, which is what CNC precision parts processing needs to do. CNC lathe milling plane class parts of the feed path Milling planar parts outside the general, usually choose the side edge of the end mill for cutting. In order to reduce the traces of the cutter, to ensure the quality of the appearance of the parts, the cutter cut-in and cut-out procedures need to be carefully designed. When milling the outer surface, the entry and exit points of the milling cutter should be along the extension line of the general curve of the part to cut into and out of the exterior of the part, and should not be cut directly into the part along the normal direction, in order to avoid scratches on the machined surface and to ensure the general lubrication of the part. Milling off the internal general appearance, if the internal general curve promises to extend, it should be cut into and cut out along the tangent direction. If the internal general curve does not allow the extension, the tool can only cut in and out along the normal direction of the internal general curve, and will be cut, cut out point selected in the intersection of the two elements of the part general. When the internal elements are tangent to each other without intersection, in order to avoid the notch left at the corner of the generalization when the tool is withdrawn, the tool entry and exit points should be far from the corner. Shown is the tool path when milling the outer full circle by circular interpolation method. When the whole circle processing is finished, do not 2 back at the cutting point, but should let the tool move along the tangent direction for a distance, to avoid the withdrawal of the tool complement, CNC lathe tool and workpiece appearance touch, constitute the workpiece waste. When milling the inner arc, we should also follow the guideline of cutting from the tangential direction, and best organize the processing road from the arc transition to the arc, which can improve the processing accuracy and processing quality of the inner hole appearance.

How to achieve 0.8 surface roughness of aluminum alloy for cnc machining? Use a larger diameter milling cutter disc, rotating speed as high as possible, but the machine can not vibrate, rough milling to leave 0.3-0.5mm margin and then finish machining, can not be achieved depending on the milling cutter line speed enough, the blade sharp or not. To a larger diameter milling cutter disc is to easily reach high linear speed, light to increase the speed does not increase the diameter of the milling cutter disc effect is not good. Doing so is generally able to achieve 0.8 roughness in addition, the fine milling time to add sufficient cutting fluid.   What is the general CNC processing surface roughness? General ordinary machine tools are processed out of about 3.2, high-speed machines can reach 1.6 finish; note that it depends on the tool and cutting parameters used in the processing. The smaller the value of the surface roughness of the part, the finer it is?   1, about the contour meter and roughness meter Contour meter and roughness meter is not the same product, the main function of the contour meter is to measure the contour shape of the surface of the parts.   For example: the groove depth, groove width, chamfer (including chamfer position, chamfer size, angle, etc.) of the grooves in the automotive parts, the straightness of the cylindrical surface plain line and other parameters. In short, the contour meter reflects the macro profile of the part.   2, the function of the roughness meter is to measure the surface of the parts surface grinding / finishing process surface processing quality, in layman's terms, is the parts surface processing light or not (roughness of the old national standard called finish), that is, roughness reflects the microscopic situation of the parts processing surface.

For CNC computer gong machining center positioning datum selection, how do the relatives choose it? Because CNC computer gong machining center positioning in the machinery industry is also a lot of user knowledge is weak in terms of, then CNC computer gong machining center positioning benchmark selection what are they?CNC computer gong machining center positioning benchmark what are the points? I. Three basic requirements for choosing a benchmark. ①. The selected benchmark should be able to ensure accurate positioning of the workpiece easy and reliable loading and unloading. ②. The selected benchmark and the size of each processing part is simple to calculate. ③. Ensure machining accuracy. Second, the best clamping position of the workpiece on the machine table: workpiece clamping position should ensure that the workpiece in the machine tool within the range of the machining stroke of each axis, and make the length of the tool as short as possible to improve the rigidity of the tool processing.   Third, the selection of positioning benchmark 6 principles. ①, try to choose the design reference as the positioning reference. ②, positioning datum and design datum can not be unified, should strictly control the positioning error to ensure processing accuracy. ③, the workpiece needs more than two clamping processing, the selected benchmark in a clamping positioning can complete all the key precision parts of the processing. ④, the selected benchmark to ensure the completion of as much processing content. ⑤, batch processing, part positioning benchmark should be as far as possible with the establishment of the workpiece coordinate system of the tooling benchmark overlap. ⑥, need for multiple clamping, the benchmark should be unified before and after.

What are the main causes of errors in machining mechanical parts? Machining accuracy refers to the degree of conformity between the actual geometric parameters (size, shape and position) of the machined mechanical part and the ideal geometric parameters. In the machining of mechanical parts, the error is inevitable, but the error must be within the permissible range. Through error analysis, grasp the basic laws of change, so as to take appropriate measures to reduce processing errors, improve processing accuracy. 1、Spindle rotation error. Spindle rotation error refers to the actual axis of rotation of the spindle at each instant relative to its average axis of rotation of the amount of change. The main reasons for the spindle radial rotation error are: several sections of the spindle journal coaxiality error, bearing itself of various errors, coaxiality error between the bearings, spindle deflection, etc. 2、Guideway error. Guide rail is a machine tool to determine the relative position of the machine components of the benchmark, but also the benchmark of machine movement. Uneven wear and installation quality of the guide rail, is also an important factor causing the error of the guide rail. 3, the transmission chain error. Drive chain transmission error is the first and last two ends of the drive chain is linked to the error of the relative motion between the transmission elements. Transmission error is caused by the manufacturing and assembly errors of the components of the transmission chain and the wear and tear in the process of use. 4, the geometric error of the tool. Any tool in the cutting process, it is inevitable to produce wear and tear, and the resulting change in the size and shape of the workpiece. 5, positioning errors. First, the reference does not overlap error. In the parts used to determine the size of a surface, location based on the benchmark known as the design benchmark. In the process diagram used to determine the process is processed on the surface size, location based on the benchmark called the process benchmark. In the machine tool for processing the workpiece, you need to choose a number of geometric elements on the workpiece as a positioning reference for processing, if the chosen positioning reference and the design reference does not overlap, it will produce the reference does not overlap error. Second, the positioning sub manufacturing inaccuracy error. 6, the process system deformation of the error generated by the force. First, the workpiece stiffness. Process system if the workpiece stiffness relative to the machine tool, tool, fixture is relatively low, under the action of cutting force, the workpiece due to insufficient stiffness and deformation caused by the impact on the machining accuracy is relatively large. The second is the tool stiffness. External turning tool in the direction of the machining surface normal to the stiffness is very large, the deformation can be negligible. Boring smaller diameter bore, toolholder stiffness is very poor, toolholder deformation on the hole machining accuracy has a great impact. Third, the stiffness of machine components. Machine parts by many parts, machine parts stiffness so far there is no suitable simple calculation method, or mainly with experimental methods to machine parts stiffness. 7, the process system caused by thermal deformation of the error. Process system thermal deformation on the impact of machining accuracy is relatively large, especially in precision machining and large parts processing, caused by thermal deformation of the processing error can sometimes account for 50% of the total error of the workpiece. 8, adjustment error. In each process of machining, the process system should always be adjusted in one way or another. Because the adjustment can not be absolutely accurate, thus producing adjustment errors. In the process system, the workpiece, tool in the machine tool position accuracy of each other, is through the adjustment of the machine tool, tool, fixture or workpiece to ensure that. When the machine, tools, fixtures and workpiece blanks, such as the original accuracy of the process requirements and do not take into account the dynamic factors, the impact of the adjustment error, the processing accuracy plays a decisive role. 9, measurement error. Mechanical parts processing or measurement after processing, due to the measurement method, gauge accuracy and workpiece and subjective and objective factors have a direct impact on the measurement accuracy.

Mechanical spare parts processing precision in the improvement of the industry changes, the role and effect of these above the obvious, following the development of our industry, now some of our metal parts processing aspects are also getting better and better, some cutting work is also more and more accurate, accurate to what extent, the following tell you the answer! Precision mechanical parts processing technology has made new progress, CNC gold cutting machine tool processing accuracy has been upgraded from the original silk level (0.0'mm) to the current micron level (0.00'mm), some varieties have reached 0.0μm or so. Ultra-precision CNC machine tools for micro cutting and grinding processing, precision can be stable to about 0.0μm, shape accuracy up to about 0.0'μm. The use of light, electricity, chemical and other energy sources of special processing accuracy can reach the nanometer level (0.00'μm). Through the optimization of machine tool structure design, machine tool components of ultra-fine machining and precision assembly, the use of high-precision full dead cycle control and temperature, vibration and other dynamic error compensation technology, thus entering the era of sub-micron, nano-level ultra-fine machining. Functional components continue to improve the performance of functional components continue to high speed, high precision, high power and intelligent direction, and to achieve mature applications. Full digital AC servo motors and drives, high technology content of electric spindles, torque motors, linear motors, high-performance linear rolling components, high-precision spindle units and other functional components to promote the application, greatly improve the technical level of CNC lathes.