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cnc machining factory CNC machining speed control method?

cnc machining factory CNC machining is developing in the direction of high efficiency and efficiency. This includes CNC machining speed control. In order to achieve maximum efficiency in the working stroke, the moving parts must accelerate to a high speed stroke in a short period of time and stop immediately in the middle of the high speed stroke. Therefore, it is necessary to control the machining speed of CNC machining center. Based on the open control idea, an automatic acceleration and deceleration control method for CNC machine tools based on arbitrary curves is proposed. The automatic acceleration and deceleration control technology is developed from the traditional fixed mode to a new flexible mode, which explores a new way to effectively improve the dynamic performance of CNC machine tools.   1. Flexible acceleration and deceleration control device.   CNC machining, generally by the system program directly to achieve a specific speed automatic control function. In this way, the acceleration and deceleration characteristics of the system can be changed, and the CNC program can also be modified by acceleration and deceleration control, so that ordinary users cannot make the CNC machine tool have the best acceleration and deceleration performance according to their own wishes. For this reason, we propose a flexible acceleration and deceleration control method based on the database principle, which divides acceleration and deceleration control into acceleration and deceleration description and execution, and separates them from the system program. The software is designed with a universal control channel independent of the acceleration and deceleration database, and is able to perform acceleration and deceleration calculation and trajectory control independently. 2. Automatic acceleration control system for flexible CNC machining.   Acceleration curves, analysis curves and non-analysis curves are created and stored as a table of values as templates in the acceleration and deceleration curve library.   3. Automatic deceleration control system for flexible CNC machining.   Acceleration control is stored as a numerical table in a library of acceleration and deceleration curves. Proper automatic acceleration and deceleration control is essential to ensure the dynamic performance of the CNC machine. Traditional automatic acceleration and deceleration control based on fixed curves is difficult to ensure that the acceleration and deceleration process is coordinated with the machine performance and to optimize the dynamic characteristics of the machine motion due to the lack of flexibility.

2023

02/23

What are the principles required in the processing of aluminum cnc machining in general?

Aluminum cnc machining has great advantages relative to manual machining, such as CNC machining produces very accurate and repeatable aluminum parts; aluminum cnc machining can produce parts with complex shapes that cannot be done by manual machining. So what are the principle requirements. (1) In order to ensure the accuracy of aluminum alloy cnc machining, rough and finish machining zui better be carried out separately. Because rough machining, cutting volume, the workpiece by the cutting force, clamping force, more heat, as well as the processing surface has a more significant machining hardening phenomenon, there is a large internal stress inside the workpiece, if rough, rough machining is carried out continuously, the precision of the parts after finishing will be quickly lost because of the redistribution of stress. For some parts with high machining accuracy requirements. After roughing and before finishing, should also arrange low-temperature annealing or aging treatment process to eliminate internal stress.   (2) reasonable choice of aluminum alloy cnc machining equipment. Rough machining is mainly cut off most of the machining allowance, and does not require a high degree of machining accuracy, so rough machining should be in the power, precision is not too high machine tools, finishing processes require a higher precision machine tools. Rough and finish machining are processed on different machine tools, not only can give full play to the capacity of the equipment, but also can extend the service life of precision machine tools.   (3) in the aluminum alloy cnc machining process route, often arranged with heat treatment process. Heat treatment process location arrangements are as follows: to improve the cutting performance of the metal, such as annealing, normalizing, tempering, etc., generally arranged in the mechanical processing before. To eliminate internal stresses, such as aging treatment, tempering treatment, etc., generally arranged after roughing, before finishing. In order to improve the mechanical properties of the parts, such as carburizing, quenching, tempering, etc., generally arranged in the mechanical processing after. If there is a large deformation after heat treatment, must also arrange the zui final processing process. Correct operation and maintenance is one of the key factors in the correct use of aluminum alloy cnc machining equipment, in the correct operation and use can prevent abnormal wear and tear of machine tools, to avoid sudden failure; routine maintenance, equipment to maintain good technical condition, delay the deterioration process, timely detection and elimination of potential problems of failure, always to ensure safe operation.

2023

02/22

cnc machining plant CNC machining center oil leakage condition is what causes?

General CNC machining usually refers to computer digital control of precision machining, CNC machining lathe, CNC machining milling machine, CNC machining boring and milling machine, etc.. To work is to prepare the processing program, that is, the original manual work to computer programming. Of course need to have manual processing experience. cnc machining factory CNC machining center oil leakage condition is what cause? 1, oil change does not meet the requirements.   Often also causes oil leakage from the center of the CNC machinist. Oil change in the problem is mainly manifested in three aspects. One, for the use of high-viscosity lubricant parts, oil change arbitrarily changed to low-viscosity lubricant, it will make the corresponding box, shaft holes and other sealing performance is affected to a certain extent, and sometimes will greatly reduce the sealing of these parts.   Secondly, when changing oil without cleaning the oil tank, the dirt in the oil tank may enter the lubrication system, blocking the oil path, wear the seals causing oil leakage. Third, the oil change when the amount of oil is too much, especially in the parts of the rotating parts, due to the churning of rotating parts   role, more likely to overflow oil phenomenon. 2, the lubrication system parts of the selection and adjustment is not appropriate and cause oil leakage.   For example, the cnc machining maintenance personnel maintenance selected too high pressure or too much oil pump, or adjust the system pressure, relief valve, safety valve, pressure reducing valve and other pressure adjustment is too high, CNC machine tool lubrication system flow is too large, etc. with the return system and sealing system does not match, it will cause oil leakage.   In fact, causing cnc machining center oil leakage is not just the above points, if we encounter similar problems in the operation must do a good job of checking, find the cause in time to avoid unnecessary losses. In the machining center back after the purchase of a good comprehensive inspection to see if there are casting defects or parts damage problems, such as timely contact with the manufacturer. The operator should also pay attention to the following points when using the cnc machining center to process the workpiece.   (1) For the first trial cutting process of Kunshan CNC machining factory, a single-stage operation mode should be used for processing.   (2) When the CNC milling machine automatic operation begins, the fast multiplier, feed multiplier S is in Z low gear, and then increase efficiency after cutting into the workpiece.   (3) In the operation of CNC milling machine machining program, you need to pay attention to the CNC system coordinate display.   (4) It is forbidden to touch the CNC milling machine tools and chips with your hands. The chip must be cleaned with a brush.

2023

02/22

What are the causes of errors in cnc machined parts?

During the operation of the cnc machining center, there is a certain gap between the screw and the nut. With the increase of equipment running time, the gap gradually increases due to wear and tear. Therefore, the corresponding gap compensation for reverse motion is the main factor to overcome the shoulder generated on the machined surface. Gap measurement is usually done by the percentage meter measurement method, which requires error control. However, it should be noted that gauge holders and gauge rods should not be extended too high or too long, because during the measurement process, due to the long cantilever, the gauge holders will be moved by forces, which will lead to inaccurate counts and errors in the compensation values.   Improper tool selection in CNC machining can also lead to dimensional errors. During the cutting process, the tool removes material through the main cutting edge. However, after the arc crosses the quadrant and the arc is tangential to the second cutting edge of the tool, the second cutting edge can be involved in the cut. Therefore, the wedge angle of the tool must be carefully considered when selecting or grinding the tool. During CNC machining, errors can also occur if the machining allowance is not uniform. Whether the machining allowance of the surface to be CNC machined is even or even not is also important in achieving the design performance of the part. Because the machining allowance is not uniform, it is easy to cause "remapping" errors. Therefore, for parts with high surface shape requirements, the machining allowance should be made as even as possible before forming, or multiple contours should be machined to meet the design requirements. CNC machining has clear regulations on the shop environment and the need to reduce heat sources: the focus is on spindle bearing speed, clearance adjustment and reasonable preload. For thrust bearings and tapered roller bearings, due to their harsh operating conditions and high heat generation, thrust angular contact ball bearings can be used when necessary to minimize friction and heat generation in certain parts.   CNC machining also needs heat insulation: keep the heat source away from the spindle, such as isolating the motor and drive, using a separate drive, etc. CNC machining also needs heat dissipation: strengthen lubrication and cooling, using oil cooling, air cooling and other methods to accelerate heat dissipation. Reduce the impact of thermal deformation:No matter what method is used, it can only reduce thermal deformation, it is difficult to completely eliminate thermal deformation. Therefore, measures should also be taken to reduce the impact of thermal deformation.

2023

02/22

How to improve the processing efficiency of non-standard equipment precision parts processing?

Non-standard equipment precision parts processing process will present tool wear accelerated, poor processing appearance integrity, chip removal difficulties and other common problems, seriously affecting the quality of such material precision parts processing, production cycle and processing costs. Non-standard equipment parts processing needs to get super-lubricated processing appearance and high processing accuracy, which requires a high standard life of the knife, the tool is not worn, will be based on the quality of the processed appearance is not reduced super poor. Diamond tool standard life is very high, high-speed cutting tool wear is also very slow. Therefore, ultra-precision cutting, cutting speed is not subject to the constraints of tool life, which is different from the general cutting rules.   Non-standard equipment parts processing practice selected cutting speed, often based on the use of ultra-precision machine tool dynamic characteristics and cutting system dynamic characteristics of the selection, that is, the selection of the minimum vibration speed. Because at this speed the appearance of the smallest roughness, the highest quality machining. Obtaining a high quality non-standard machined appearance is the primary concern in the machining of non-standard equipment parts. The use of good quality, especially the dynamic characteristics of good, small vibration of the ultra-precision machine tools can use high cutting speed, can improve the power of processing. The selection of non-standard equipment parts processing parameters include the selection of the cutting tool point of view, the selection of cutting speed and depth of cut and feed rate selection. From the past experience we know that in the processing of plastic materials, if you select a larger front angle of the tool can be useful to press down the composition of the chip tumor, which is the front angle of the tool increases, the cutting force is reduced, cutting deformation is small, the tool and chip contact length becomes shorter, reducing the basis for the composition of the chip tumor.

2023

02/22

What important role does cnc machining play in the market?

cnc machining is a new type of machining process, while cnc machining method is still the process technology characterized by agile speed. Whether it is CNC machining, metal parts processing, or some other mechanical equipment processing, the situation is now increasing, the level of science and technology is also improving, enhancing the level of industrial processing, the economy also followed, for the development of various industries, the effect is also better, now to understand the role of cnc parts processing it! What role does cnc machining parts play in the market?   A, a large number of reduce the number of tooling, processing the shape of complex parts do not require complex tooling. If you want to change the shape and size of the parts, only need to modify the parts processing procedures, suitable for new product development and reshaping.   Second, the machine tool composite technology to further expand with the progress of CNC lathe technology, composite machining technology is becoming increasingly mature, including milling - turning composite, milling composite, turning - boring - drilling - gear machining and other composite, turning and grinding composite, forming composite machining, special composite machining, composite machining accuracy and efficiency greatly improved. Third, there is a new breakthrough in the intelligent technology of CNC lathes, which is more reflected in the performance of the CNC system. Automatic adjustment of interference anti-collision function, the workpiece automatically exit the safety zone after power failure power failure protection function, processing parts detection and automatic compensation learning function, high-precision processing parts intelligent parameter selection function, processing automatically eliminate machine vibration and other functions into the practical stage, intelligent to enhance the function and quality of the machine tool.

2023

02/21

How to ensure the accuracy of the size of the aluminum material processed by CNC lathe?

With the development of industry, CNC lathe technology has become more and more exquisite. Then how to ensure the accuracy of the size of the CNC lathe processing aluminum material? The following is a brief description for you. First and foremost, there are several dimensions that must be taken into account in the preconditions of aluminum material as follows.   I. Force majeure factors. 1. The stability of the CNC lathe itself. If it is not a new CNC lathe or CNC lathe after a lot of production and processing without carrying out the condition of regulation, there will be a deviation from the specifications caused by the CNC lathe itself. There are several elements leading to the deviation of the CNC lathe itself as follows. Mechanical equipment level. a. AC servo motor and ball screw are loosened in the middle. b.Ball screw rolling bearing or nut is damaged. c. Insufficient wetting in the middle of ball screw and nut. Electrical equipment level. a.Common failure of AC servo motor. b. Internal stain of the scale. c. Common fault of servo motor amplifier. The main parameters of the system software level can be carried out PMC repair, so omitted to mention. 2. Water cooling deformation after the production and processing of steel parts. Most of this can not be prevented, in the production and processing as far as possible to pay attention to the application of freezing liquid, and its accurate measurement when carrying out when the government, pay attention to the deformation of steel parts after water cooling. Second, preventable elements. 1. Production process I think the vast majority of specific production and processing deviations are caused by the production process is not scientific, in order to ensure that the basic production process (such as cutting CNC lathe processing "first coarse after fine, first surface after the hole, first a large number after Chongqing small surface" or tooling fixture application "to reduce the frequency of clamping, as far as possible to use a combination of Fixture" and other basic production process key points), basically, try to avoid the iron pin on the die casting production processing deviation, because the die casting is very good very soft, remove the iron pin is very easy to make the die casting lead to production processing deviation. To learn a lot of CNC machine expertise please add Q group 192963572, for example, in FANUC or Mandarin Hotel CNC machine tools, playing deep holes as far as possible to apply the G83 command, so that the iron pin can be lined up, and not G73 command. 2. cutting three elements: cutting amount vc, cutting speed f, drilling depth 1ap and CNC insert compensation This line is really not very good in detail, in simple terms, that is to say, in order to ensure the production and processing quality and damage to the CNC inserts under the premise of adjusting the main parameters of the full use of CNC inserts processability, so that the maximum efficiency of drilling, the least cost of production. In the CNC milling machine, there are also factors such as compensation for blade damage.   3. Manual production program writing and automatic programming in the numerical calculation In the manual production program writing, measurement appear deviation are common, but nowadays most of the production manufacturing are automatic programming. 4. Tool setting Inaccurate tool setting are the elements that lead to the deviation of specifications, as far as possible to pick a good edge finder, if the CNC lathe has a fully automatic tool setter you will be stronger, if not edge finder, tool radius compensation it, which means the actual operation work experience.

2023

02/21

Analysis of the factors affecting the roughness of the cutting surface in the machining of precision parts?

1, cutting force and friction influence. When precision parts processing cutting special tools cutting edge arc and its response to the side of the product workpiece extrusion and friction will cause the metal material to produce plastic deformation, which in turn causes the current residual areas distorted or aggravated concave groove, enhance the surface roughness and cause the production and processing of brittle raw materials at this time, cutting chips into crushed particulate matter, and the production and processing of the surface often shows the particles collapse marks, leaving Many dents, so that the surface is not smooth. 2, the impact of processing hardening. When cutting special tools to cut plastic at a certain rate, cutting on some small particles will adhere to the top of the front edge, resulting in a high toughness of the stacking edge, can replace the front edge and cutting edge laser cutting.   When the sliding friction between the cutting and stacking edge exceeds the spray weld compressive strength between the stacking edge and the front edge, or when it is damaged or vibrated, the stacking edge will burst out, and thus the new creation-up edge will be slowly transformed afterwards. The generation of stacked edges, growth and development and fall off will seriously affect the surface roughness of the part. 3, the impact of scale thorns. In the cutting full process, because of precision parts processing when cutting in the cutting surface friction and spray welding, cutting chips will be on time to stay in the front tool surface, and then squeeze the surface of the new production processing. In obvious cases, the surface will tear. Phosphorus-like spurs are produced on the surface, making the surface unsmooth and uneven.   Because of the influence of the above physical elements on the surface roughness, in order to better reduce the surface roughness, in addition to reducing the plastic deformation caused by the cutting force, to prevent the malignant tumor of the accumulation and the creation of debris during the machining of precision parts.

2023

02/21