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

At this stage, it is not difficult to see that the market for new surgical instruments is growing, which are used for cardiac catheterization, abdominal surgery, liposuction, colonoscopy and other operations or operations. Obviously, reliability and quality are the key to this industry, and it is very important that medical parts must be of high quality and appearance. Medical parts processing The design and development of medical devices is the key stage of its success, and in the production of medical devices, cnc processing is particularly important. Cnc machining has the advantages of high customization, strict tolerance, good surface finish and certified material selection. When CNC machining is used, parts are usually milled with 3 to 5 axes or turned with a movable tool CNC lathe. Manufactured items include various surgical instruments used in medical operations, such as trocar (skin piercing device), bone drill and saw. How does cnc manufacture medical parts? The most common types of machines used in the manufacture of medical parts include CNC milling machines, lathes, drilling machines and computerized milling machines. Medical parts processed in CNC are generally divided into processes according to the principle of process concentration. The methods of division are as follows: Tools for medical parts processing 1. Divided by tool used Taking the technological process completed by the same tool as a working procedure, this division method is applicable to the case where there are many surfaces to be machined. This method is often used in cnc machining centers. 2. Divided by the number of workpiece installation Take the technological process that can be completed by one clamping of parts as a process. This method is suitable for parts with few processing contents. On the premise of ensuring the processing quality of medical parts, all processing contents can be completed at one time. 3. Classified by rough and finish machining The part of the process completed in rough machining is regarded as one process, and the part of the process completed in finish machining is regarded as another process. This cnc machining division method is applicable to parts with strength and hardness requirements, requiring heat treatment or parts with high accuracy requirements, requiring effective removal of internal stress, and parts with large deformation after machining, which need to be divided according to rough and finish machining stages. 4. According to the division of processing parts, the part of the process that completes the same profile is regarded as a process. For the parts with many and complex cnc machining surfaces, the sequence of nc machining, heat treatment and auxiliary processes should be reasonably arranged, and the problem of connection between processes should be solved. Before clamping raw materials, first measure whether the blank size meets the drawing requirements, and carefully check whether its placement is consistent with the programming instructions. Self inspection shall be carried out in time after the rough machining process is completed in CNC machining, so as to adjust the error data in time. The self inspection mainly includes the position and size of the processing parts: (1) Whether the mechanical parts are loose during processing; (2) Whether the processing technology of medical parts is correct; (3) Whether the dimension from the CNC machining part to the datum edge (datum point) meets the drawing requirements; (4) Location and dimensions of medical components. After checking the position and size, it is necessary to measure the rough machined shape ruler (except for the arc). Medical parts shall be finished after rough machining is confirmed. The shape and size of the drawing parts shall be self checked before the finishing of medical parts: the length and width of the vertical surface processing parts shall be checked; Measure the base point dimension marked on the drawing of the inclined plane processing part. After completing the self inspection of parts and confirming that they meet the drawing and process requirements, the workpiece can be taken out and sent to the inspector for special inspection. For small batch processing of medical parts, batch processing shall be carried out after the first article is confirmed to be qualified. What are the specific requirements for medical parts processing? As we mentioned above, reliability and high quality are the top priorities of medical parts processing. Therefore, the medical device industry has put forward new requirements for professional precision tools. Difficult to machine materials, complex workpiece shapes and frequent small batch production have put forward high requirements for tools used to process professional medical devices. It is mainly shown in: Manual of medical parts processing 1. The requirements for CNC machine tools are relatively high: Advanced medical equipment processing equipment such as Swiss automatic lathes, multi spindle machine tools and rotary workbenches are completely different from commonly seen machining centers and lathes. They are very small in size and compact in structure; To meet this requirement, the structure of the tool also needs special design. The size of the tool should be very small, and the rigidity of the tool should also be guaranteed. 2. High requirements for CNC processing efficiency: For medical devices, the most important thing is the processing efficiency, that is, the processing rhythm. It is required to replace the blade in the shortest time. 3. High requirements for CNC machining workpiece cleanliness: From the workpiece itself, it is very different from other mechanical parts; Medical devices implanted into the human body are required to have a very good surface finish, high accuracy and no deviation. This requires that the design of the knife blade structure and the design of the blade coating meet high processing requirements. 4. High precision requirements for CNC machining tools: Precision requires tolerances within the micrometer range, which is common in the medical industry. Choosing the right tool requires keen insight and rich experience. On the one hand, even drilling small holes requires the use of lubricants to reduce friction, reliably dissipate heat and handle fine iron chips at the blade; On the other hand, when producing cutting-edge medical devices (without burrs), it is necessary to use sharp and smooth cutting tools to obtain high-quality surfaces.

As we all know, CNC machining center is suitable for machining complex, multi process, high requirements, need a variety of types of ordinary machine tools and a variety of tool fixtures, and need to clamp and adjust many times before processing parts. The machining objects are mainly box parts, complex curved surfaces, special-shaped parts, clad plate parts and special machining. What are CNC parts processing? Shenzhen Noble Intelligent Manufacturing Technology Co., Ltd. will explain it to you specifically! Robot parts processing 1、 Box parts: Box parts generally refer to parts with multiple hole systems, cavities inside, and a certain proportion of length, width and height. Such parts are mostly used in machine tools, automobile, aircraft manufacturing and other industries. Box shaped parts generally require multi station drilling and plane processing, with high toleraCNCe requirements, especially strict form and position toleraCNCe requirements. They usually go through milling, drilling, expanding, boring, reaming, spot facing, tapping and other processes, requiring more tools. For the machining center for machining box parts, when there are many machining stations and the worktable needs to rotate for many times to complete the parts, the horizontal boring and milling machining center is generally selected. 2、 Complex surface parts: Complex surfaces play an important role in mechanical manufacturing, especially in aerospace industry. It is difficult or even impossible to complete complex surfaces using ordinary machining methods. In China, the traditional method is to use precision casting, which can be imagined to be low in accuracy. Complex surface parts, such as various impellers, wind deflectors, spheres, various surface forming molds, propellers, underwater vehicle propellers, and other free surfaces. 3、 Special parts and accessories Special shaped parts are parts with irregular shape, and most of them require multi station hybrid processing of points, lines and surfaces. The rigidity of special-shaped parts is generally poor, the clamping deformation is difficult to control, the machining accuracy is difficult to ensure, and even some parts of some parts are difficult to complete with ordinary machine tools. When machining with a machining center, reasonable process measures shall be taken, iCNCluding one-time or secondary clamping, and the characteristics of multi station point, line and surface mixed processing of the machining center shall be used to complete multiple processes or all processes. 4、 Disc, sleeve and plate parts: Vertical machining centers shall be selected for disk parts with keyways, or radial holes, or distributed hole systems, curved disk sleeves, or shaft parts, such as flanged shaft sleeves, keyways, or square head shaft parts, as well as multi hole machining plates, such as disk parts with distributed holes and curved surfaces on various motor end faces, and horizontal machining centers with radial holes. 5、 Trial production parts of new products: CNC machining center has wide adaptability and high flexibility. When the processing object is changed, the processing can be realized by compiling and inputting a new program. CNC processing of medical parts CNC machining is a very convenient and effective manufacturing technology. It uses computer digital control (CNC) technology to control the machines and tools for processing various materials and articles. What problems should we pay attention to when processing spare parts? 1、 CNC tool selection for parts CNC machining: The CNC machining quality of product parts depends to a great extent on the quality control of CNC tools. According to acoustic material monitoring, milling time control, stop inspection during milling, surface layer analysis of product parts and other methods, distinguish all normal damage conditions and abnormal damage conditions of CNC tools in the whole process of automatic milling. The milling cutter shall be solved immediately according to the production and processing regulations to prevent production and processing quality problems caused by improper handling of CNC cutters. 2、 CNC parts processing flow: When monitoring rough machining, the main consideration is to quickly remove the excess capacity of the product surface layer. During automatic production processing, CNC tools automatically perform milling production processing according to the preset feed rate and the predetermined milling movement path. At this time, the actual operators should pay attention to the change of milling load in the whole process of automatic production and processing of spare parts, and adjust the feed rate according to the bearing capacity of the CNC cutter to make full use of the relatively high efficieCNCy of the CNC machine tool. (1) After the CNC machining center is powered on, check whether all switch buttons and indicator lights are normal. If there is any abnormality, shut down the machine immediately and report it to the maintenaCNCe personnel. (2) Before formal processing, return the coordinates of the machining center to zero, and let the machine idle for more than 15 seconds before formal operation. (3) In order to simplify positioning and installation, CNC machining centers have relative processing origins on no positioning surfaces and precise coordinate dimensions. (4) During installation, ensure that the stroke of the workpiece is within the stroke range of the spindle. (5) When installing the workpiece, it is necessary to ensure that the workpiece is installed firmly, but it is also important not to tighten it too tightly, which may lead to loss of positioning accuracy. 3、 CNC parts milling sound monitoring: Generally, at the beginning of automatic milling production, the sound of CNC tool milling product parts is relatively stable, continuous and fast, and the motion of CNC machine tool is relatively stable. In the whole process of production and processing, the production and processing are unstable due to the existeCNCe of hard spots in product parts, the destruction of CNC tools, the clamping of CNC tools and other reasons. Its expression forms are the transformation of milling sound, the mutual impact sound between CNC tools and product parts, and the vibration of CNC machine tools. During this period, the feed rate and milling standard shall be adjusted immediately. When the adjustment effect is not obvious, the CNC machine tool shall be interrupted and the condition of the CNC cutter and product parts shall be checked.

The CNC machining center has a strong comprehensive processing capability. After the workpiece is clamped oCNCe, it can complete more processing contents and has higher processing accuracy. For medium and difficult to process batch workpieces, its efficieCNCy can reach 5~10 times of that of ordinary equipment. In particular, it can complete processing that many ordinary equipment cannot complete. It is more suitable for single processing or small batch and multi variety production with complex shape and high accuracy requirements. What is the surface roughness of CNC machining? Lathe processing parts The surface roughness is generally formed by the processing method adopted and other factors, such as the friction between the tool and the part surface during CNC processing, the plastic deformation of the surface layer metal during chip separation, and the high-frequeCNCy vibration in the process system. Due to different CNC machining methods and workpiece materials, the depth, density, shape and texture of the traces left on the machined surface are different. Generally, ordinary machine tools are about 3.2, and high-speed machines can achieve a finish of 1.6; Note that the tool and cutting   parameters used in the processing shall be considered. The details are as follows: 1、 Roughness of CNC turning: CNC turning is a computer CNC processing process in which the turning tool moves in a straight line or curve in the plane through the rotation of the workpiece to process the internal and external cylindrical surfaces, end faces, conical surfaces, forming surfaces and threads. (1) Generally, the surface roughness of CNC turning is 1.6-0.8 μ M。 (2) Rough turning: use large cutting depth and large feed to improve efficieCNCy without reducing cutting speed. The surface roughness is required to be 20-10 μ m。 (3) Semi finish turning and finish turning: small cutting speed and high speed feed are adopted, and the surface roughness is required to be 10-0.16 μ M。 (4) For high-precision CNC lathe: precision grinding diamond turning tool can be used for high-speed precision turning of non-ferrous metal workpieces, with surface roughness of 0.04-0.01 μ m. Also called "mirror turning". 2、 CNC boring processing roughness: Boring is an internal cutting technology that uses a boring cutter to enlarge a hole or other existing circular contour. The tool used is usually a single edged boring tool (boring bar). Suitable for semi rough machining to finish machining. (1) The boring accuracy of steel can reach 2.5-0.16 μ M。 (2) The precision of fine boring can reach 0.63-0.08 μ M。 3、 Roughness of CNC milling: CNC milling refers to the process of machining static workpieces with rotating multi-point cutters on computer controlled machine tools, which is suitable for machining grooves, planes, gears and special features. (1) The general surface roughness of milling is 6.3-1.6 μ M。 (2) Rough milling accuracy: 20-5 μ M。 (3) Semi finish milling: 10-2.5 μ M。 (4) Finish milling: 6-0.63 μ M。 3、 CNC machining roughness of grinding machine: Grinding is an abrasive processing technology that uses the grinding wheel to cut off the redundant materials on the workpiece. It is widely used in the mechanical manufacturing industry, usually used for semi finishing and finishing, and can achieve finishing and precision cutting. The grinding can be controlled to move around the fixed workpiece. (1) The ground surface roughness is generally 1.25-0.16 μ M。 (2) The surface roughness of precision grinding is 0.16-0.04 μ M。 (3) The surface roughness of ultra precision grinding is 0.04-0.01 μ M。 (4) The surface roughness of mirror grinding is less than 0.01 μ M。 The surface roughness of CNC machining is closely related to the matching property, wear resistaCNCe, fatigue strength, contact stiffness, vibration and noise of mechanical parts, and has an important impact on the service life and reliability of mechanical products. Ra is used for general marking. The sampling length shall be selected according to the formation and texture characteristics of the actual surface of the part. The sampling length shall be measured according to the general trend of the actual surface profile. The sampling length is specified and selected to limit and weaken the influeCNCe of surface waviness and shape error on the measurement results of surface roughness. CNC parts processing Surface roughness has a great influeCNCe on the use of parts. Generally speaking, small surface roughness will improve the fitting quality, reduce wear and prolong the service life of parts, but the processing cost of parts will iCNCrease. Therefore, the surface roughness value should be selected correctly and reasonably. When designing a part, the selection of surface roughness value is determined by the role of the part in the machine. Milling parts Although CNC machining can produce parts with strict toleraCNCe and fine parts from various metal or plastic materials, due to the reduction of the machining process, the part surface will have small tool marks after machining. However, we can use a variety of methods to improve the surface roughness, visual performaCNCe and wear resistaCNCe of CNC machined parts. What is the classification of CNC machining accuracy? The existing CNC machining process requires the highest and minimum toleraCNCe for grinding accuracy. PuCNChing machine, die-casting and other stations can be taught high. Mastering the accuracy toleraCNCe of each process can make CNC machining center play a good role. For different industries, the accuracy levels for different products are different. Let's have a look at the details! In general, IT6 is an important fit index widely used in CNC machining, which is classified according to international precision toleraCNCe. IT6 indicates that the mating face has high uniformity requirements, can ensure a fairly high mating performaCNCe, and is stable and reliable in use. The machining center can complete multiple processes such as drilling, milling, boring, expanding, reaming, and tapping. Drilling is an important process of the machining center, and drilling is the basic method of machining holes. Generally, drilling is performed on the drilling machine and lathe, and some of them require high precision, which can also be completed by using the CNC machining center. The drilling accuracy is not high, generally only 12.5~6.3 μ m. Generally, the surface roughness of workpiece is only 12.5~6.3 μ m. However, the subsequent semi finishing and finishing are generally completed through reaming and reaming. Milling is the most important processing procedure of CNC machining center. It can be said that all machining of CNC machining center is performed with milling cutter. Milling can be divided into up milling and down milling according to different feed rates. It is an efficient and common machining method to cut workpiece with rotary multi blade cutter. It is used to process surfaces of various complex shapes, such as plane, groove, etc., such as surface molds. The workpiece machined with this toleraCNCe accuracy has a surface roughness of 0.63~5 μ m, and the precision toleraCNCe of precision milling can generally reach IT16-IT8. The inner diameter is usually machined by boring. A CNC machining method that uses tools to enlarge the hole diameter or trim the circumfereCNCe profile, usually used to convert semi rough machining to finish machining. For steel structures, the boring accuracy error grade can reach IT9-IT7, and the surface roughness is 2.5~0.16 μ m. CNC processing factory The above is the classification of rough surface and CNC machining accuracy using CNC.

CNC processing parts 1、 Tap CNC processing method: It is the most common processing method to use the tap to process the threaded hole in tap processing, which is mainly applicable to the threaded hole with smaller diameter (D

In the industry there are many precision machining, its use of the field is still relatively wide, in each industry, the use is still more frequent, and precision machining is divided into many kinds, then the precision mechanical parts processing in which areas it is applied! Precision mechanical parts processing is widely used in national defense, medical equipment, aerospace, electronic production and other civilian military fields. With the optimization and upgrading of China's industrial structure continues to develop, the demand for machining of mechanical parts is also increasing. Therefore, by the state attaches great importance to; so, the state in this area has invested a lot of human, material and financial resources to the development of precision mechanical parts processing training personnel in China. First of all, there are many higher universities in China offering courses in precision mechanical parts machining technology, among which the representatives are Northwestern Polytechnic University, Beijing Institute of Technology and Changchun University of Technology. Precision mechanical parts processing is the basic, systematic technology of machinery manufacturing, because it is the basis of the current industrial development, and is also an important part of the future industrial development.

When we operate large machines, the sound of the machine is generally relatively large, so that there will be noise, so that other staff, will also cause some trouble, precision machining is the same, so how to reduce the noise of precision mechanical parts processing? What are the treatment methods? 1, Civilized production. Gear transmission noise has more than 30% of the reasons from the burr, bump injury. Some precision mechanical parts processing factory in the gear box assembly before the removal of burrs and bump injuries, is a passive practice. 2, To ensure the accuracy of the tooth blank.   The accuracy of the size of the gear hole is required to be distributed around the middle difference of the deviation value of the hole, set at ±0.003~±0.005mm; if the difference is exceeded but within the design requirements of the hole, it must be classified and transferred to the gear cutting process respectively. 3、Control the accuracy of gears. The basic requirements of gear accuracy: proven by practice, gear accuracy must be controlled in GB10995-887 ~ 8 levels, linear speed higher than 20m / s gear, tooth pitch limit deviation, tooth ring radial runout tolerance, tooth tolerance must be stable to 7 levels of accuracy.

Each processing method, there is it processing order, our operators, need to follow its processing order to processing, and can not be chaotic, so that the processed products, causing certain effects, or quality problems, precision machining is one of them, then the order of precision mechanical parts processing is divided into which kinds, the following let me talk to us. First, the layout of the fine parts processing sequence should be based on the construction of the parts and the blank situation, as well as the positioning clamping needs to think about, the focus is on the rigidity of the workpiece is not destroyed. 1. The processing of the previous process can not affect the positioning and clamping of the next process, the intersection of general fine parts processing process should also be considered. 2. First stop the internal shape of the cavity plus process, and then stop the shape processing process. 3. With the same positioning, clamping or the same knife processing process is best to stop in succession, in order to reduce the number of repeated positioning, the number of tool changes and the number of moving the platen.   4. In the same device to stop multiple processes, should be arranged first on the workpiece rigid destruction of small processes. Second, the tool is concentrated in the sequence method: is divided into processes according to the tool used, with the same tool to finish processing all the parts on the part can be completed. In the second knife, the third to complete the other parts they can complete. This can reduce the number of tool changes, tighten the empty range time, reduce the unnecessary positioning error. Third, to process parts in order method: On the processing of many parts, according to its structural characteristics of the processing part into several parts, such as internal shape, shape, surface or plane. General first processing plane, positioning surface, after processing holes; first processing simple geometric shape, and then processing complex geometric shape; first processing lower precision parts, and then processing higher precision requirements of the parts.

Before we process any product, we have to know what the testing standard of this processing is, because this can help us know whether the processing of this product is qualified, whether it is correct, these can be known, computer gong processing is also the same, then the computer gong processing before the testing standard to follow what standard? 1. in the division, copy, each division is completed, first copy the number of work coordinates, after clearing the zero and then check once the center to the two sides of the interval is common, to ensure that the division, copy the number of error-free. 2. Select the tool, install the tool, set up the tool and copy the Z-axis coordinates. According to the programming list to select the appropriate tool, before loading the tool to completely clean the tool head and shivering, after loading the tool to use the calibration table to check the tool has no deflection. After copying the number of tools to check once from the beginning, to prevent the wrong tool, copy the wrong number to the company brought significant losses. 3. transfer program, start processing: before the tool to use a single section to perform, the transfer speed and feed speed to the slowest, slow down the tool, watch the machine tool to show the Z-axis margin, check whether there are abnormalities, such as abnormalities immediately press the pause button, find the reason to deal with abnormalities, admit all normal after adjusting to the appropriate speed to start processing. 4. During the processing, we should pay attention to time to investigate the processing of any abnormalities, the tool has no wear, tool wear serious to suspend grinding, to ensure normal processing.

With our technology is in continuous progress, of course progress, it requires a certain processing method to be able to process, otherwise it is not processed, CNC processing is also the same, so what is the acceleration and deceleration control of CNC processing? 1. The basic idea of flexible acceleration and deceleration control In CNC processing, generally by the system program directly to achieve a specific automatic acceleration and deceleration control function. In this way, to change the system acceleration and deceleration characteristics or acceleration and deceleration control to modify the CNC program, and thus the ordinary user can not make the CNC machine according to their own wishes to have the best acceleration and deceleration performance. Therefore, our proposed flexible acceleration/deceleration control method uses the principle of database to divide the acceleration/deceleration control into two parts: acceleration/deceleration description and implementation, and separates the acceleration/deceleration description from the system program. In the CNC system software, a common control channel independent of the acceleration and deceleration database content is designed, and the acceleration and deceleration calculation and trajectory control are completed independently by it. 2. Flexible automatic acceleration control   Set acceleration curves, analysis curves and non-analysis curves, and store them as samples in the acceleration/deceleration curve library in the form of a number table. 3. Flexible automatic deceleration control The acceleration control is also stored in the acceleration/deceleration curve library as a sample in the form of a number table. Reasonable automatic acceleration and deceleration control is an important part of ensuring the dynamic performance of CNC machine tools. Traditional automatic acceleration and deceleration control based on fixed curves due to the lack of flexibility, it is not easy to ensure that the acceleration and deceleration process with the machine performance, it is difficult to make the dynamic characteristics of machine motion to achieve the best.

1、Different precision 3d printing out of the hand plate is relatively rough, low precision; and CNC processing out of the hand plate high precision, generally can reach plus or minus ten silk, the choice of high-speed drilling and tapping center processing out of the metal hand plate, in the precision can arrive. 2, the cost is different 3D printing processing programming than CNC programming is simple and easy to learn, and according to the gram charge, so the lighter weight of the hand plate can be used to 3D printing processing, large volume and weight of the hand plate advocate the use of CNC processing will be more affordable. And CNC processing of the material is relatively wide, simply can process all the plastic and metal (such as stainless steel, aluminum, etc.), and its stroke is relatively large, at least 1 meter or more, like the gantry machine, processing planning can even be the whole processing two to three meters of planning. Because the material used in 3d printing is liquid, so the characteristics of 3d printing hand board than CNC processing out of the hand board. In the strength, 3d printing molding hand board strength is poor, in the above a screw are briefly cracked; in high temperature, CNC processing out of the pc hand board in 90 degrees of high temperature will not be deformed, and 3d printing in the case of 60 degrees will be deformed. CNC hand board is directly processed in the plate above, so all aspects of the characteristics are better. The difference between the two is still very big.