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The problems and difficulties of VNC lathe in the process of processing are as follows:
First, how to deduce the good condition and service life of the tool?
In the process of automatic machine tool processing, it is necessary to use ear cutting to listen to the sound, stop the machine to inspect or touch the tool tip on time, and deduce according to the analysis of surface brightness, etc.
Second, how to select the appropriate tool according to the material characteristics?
In the process of processing, if the tool is not selected correctly, it will cause unstable or impossible processing, and affect the efficiency, but also can not make a good character. So it’s very important to choose cutting tools. When we process hard materials, we should choose rigid tools with strong tool tips. The machine should also use the principles of low speed, slow feed and less back eating to debug. Then when processing soft materials, such as aluminium alloy, nylon rod, copper and so on, we should correspond. What’s more, it’s better to increase the speed, feed rate, back feed rate, and use the corresponding alloy knife! Unique is that the slow feed table will cause slag extrusion, work piece winding, no slag crushing. This will greatly affect efficiency and character!
Third, what happens when the process or knife path is not arranged properly to affect the efficiency?
1. Similarly, although the knife should not be used repeatedly, it is absolutely not necessary to use the second knife when one knife can be finished. When the conditions permit, the sequence and procedure of knife arrangement must be arranged according to the knife path, so as to minimize the idle travel time, reduce unnecessary positioning deviation, and have the advantage of once again without the influence of the knife or the quality. Procedure, to reach a good processing form!
Fourthly, what about simple deformation when processing thin-walled products?
Such a product is a bit difficult, some may be divided into many processes to complete, may as well be based on product requirements, to analyze and infer! Surely to use low speed, slow feed, less back eat three major processing factors! And to choose a small tip, sharp blade against the tool, clamp as far as possible to choose the axial clamp (such as screw pressing). Silk sleeve, if radial tightening is used, there will always be deformation!
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Precision parts in the use of the essence is bound to be higher accuracy, the more sophisticated it can reflect the processing level and quality, at the same time, this kind of products are more popular with consumers. Generally speaking, NC processing in processing has incomparable advantages and characteristics, its product quality will usually be higher, then the characteristics of NC precision parts processing are as follows: Which ones?
1. Firstly, the manufacturing efficiency of CNC precision parts processing is higher. CNC parts processing can process multiple surfaces at the same time. Compared with ordinary lathe processing, CNC parts processing can save many processes and time, and the quality of parts processed by CNC is more stable than that of ordinary lathe.
2. NC precision parts processing plays an irreplaceable role in the development of new products. Generally speaking, after programming, it is better to process the parts with different and complex levels. The modification and updating of design only requires changing the program of lathe, which can greatly reduce the development cycle of products.
3. The automation level of NC precision parts processing is quite enough, which greatly reduces the worker’s energy intensity. The worker does not need to operate the whole process like an ordinary lathe in the process of processing. The main thing is to watch and monitor the lathe. However, the corresponding numerical control processing technology content is higher than the ordinary lathe, so it requires higher mental work than the ordinary lathe.
4. Initial investment is relatively larger than ordinary lathes, because the value of CNC lathes is quite high, and its maintenance cost and processing first planning period is long.
Above is the introduction of “some characteristics of CNC precision parts processing”. I hope to bring you positive assistance. If you have any questions, please call us. We will answer for you piously.
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CNC machine tools are mainly focused on strengthening the daily maintenance. The key maintenance work has the following contents: daily inspection, weekly inspection, monthly inspection, quarterly inspection and half-year inspection. CNC processing CNC machine tool preventive sexual care detailed as follows:
1. Daily Inspection of CNC Machining Machine Tools
Its key items include hydraulic system, spindle smooth system, guide smooth system, cooling system and air pressure system. Daily inspection is based on the normal conditions of each system to be tested. For example, when the process test of spindle smooth system is carried out, the power supply lamp should be on, the oil pressure pump should operate normally, and if the power supply lamp is not on, the spindle stop form should be maintained, which is related to the mechanical engineer. Maintenance.
2. Weekly Inspection of CNC Machining Machine Tools
Its key items include machine tool parts and spindle smooth system, which should be inspected accurately every week. It is unique to eliminate iron chips and clean up external debris for machine tool parts.
3. Monthly Inspection of CNC Machining Machine Tools
The main thing is to check the power supply and air in the dryer. The power supply voltage is rated at 180V-220V under normal conditions, and the frequency is 50Hz. If there is an exception, it should be measured and adjusted. The air dryer should be dismantled once a month and then washed and equipped.
4. Quarterly Inspection of CNC Machining Machine Tools
Quarterly inspection should focus on machine tool bed, hydraulic system and spindle smooth system. For example, when inspecting the machine tool bed, we should focus on the accuracy of the machine tool and whether the machine tool level meets the requirements of the manual. If there are any problems, it should be related to the mechanical engineer as soon as possible. When inspecting the hydraulic system and the smooth spindle system, if there are any problems, the new oil 6oL and 20L should be replaced and washed.
5. CNC Machining CNC Machine Tool Half-year Inspection
Half a year later, the hydraulic system, spindle smooth system and X-axis of the machine tool should be inspected. In case of defects, new oil should be replaced and then washed. After comprehensively understanding and managing the knowledge of patient prevention and sexual protection, we must have a deeper understanding and necessary management of the causes and treatment of the extraordinary phenomena in the oil pressure system. For example, when the phenomenon of oil pump not injecting oil, abnormal pressure, noise and other phenomena occur, we should know what the key reasons are and what the corresponding treatment methods are.
The causes and treatment of the extraordinary phenomena in the oil pressure system should be understood from three aspects:
(1) There may be low liquid level in the tank, reversal of the oil pump, insufficient rotation speed, high oil viscosity, low oil temperature, congestion of the filter, excessive volume of the suction pipe, air suction at the intake port, damage to the shaft and rotor, etc. For the key reasons, there are corresponding treatment methods, such as filling oil, confirming the label, etc. When the oil pump reverses, change it, etc.
(2) Abnormal pressure means excessive or insufficient pressure. The key reasons are also various, such as inappropriate pressure setting, bad coil behavior of pressure regulating valve, abnormal pressure gauge, leakage of oil pressure system, etc. Relevant treatment methods include: disassembly and washing according to the constitutional pressure configuration, replacement of a normal pressure gauge, sequential inspection according to each system, etc.
(3) Noise is mainly caused by oil pumps and valves. When the valve has noise, its reason is that the flow exceeds the rated criterion, and the flow should be adjusted appropriately. When the oil pump has noise, the reason and the corresponding treatment methods are also many-sided, such as high oil viscosity, low oil temperature, the treatment method is to raise the oil temperature; when there are bubbles in the oil, the air in the system should be released, and so on.
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1. The grain size of abrasives for grinding should be changed from coarse to fine in order. When changing abrasives, the grinding trace of the previous process should be completely removed. The grinding process should be carried out until only the grinding trace can be seen. It is very important to prevent the occurrence of “relief” phenomenon by pressing needle thimble.
2. The same grinding tool can only use the same size of abrasives. Before changing the size of each grinding tool, the workpiece must be sorted out completely so as not to bring the coarse abrasives or other dirt to the next working procedure to form scratches on the grinding surface.
3. Every time the grain size is changed to the next one, the last grinding target should be grinded at an angle of 30-45 degrees. If there is a deep wound, one-sided position can not only be grinded, otherwise the one-sided position will be pitted, it needs to be completely repaired to remove the pits. Average grinding is required for both simple and non-simple grinding stations.
These are the articles shared today. Do you understand them? If you want to know more about or need more non-standard fixture accessories, you are welcome to call us to inquire about our company or pay attention to our company’s official website. We will sincerely serve you.
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How to break through the bottleneck in precision machine parts machining?
Years pass by sadly, but the precision machinery parts machining plant is really not so easy. On the one hand, employees want to go home, their salaries do not have much confusion for them; on the other hand, the precision machining industry is fiercely competitive and its profits are getting thinner and thinner. Precision parts machining plant is becoming more and more embarrassing, some machine parts processing bosses sigh: immersed in precision parts processing boundaries for more than ten years, I thought I could rely on years of amazing experience to build an iron rice bowl, but found that mechanical parts plus industry rice bowl is more fragile than ceramics.
Faced with the penetration of high and new technologies such as artificial intelligence and big data into the machinery parts processing enterprises, the traditional precision machinery parts processing field is more distant. On the one hand, a large number of age still should not be allowed to learn CNC parts machining programming from scratch, on the other hand, these skills are brilliant, but difficult to land, mechanical parts processing plant to invest in these skills, may lose all its money, resulting in the past.
Nowadays, precision machine parts processing is facing a big dilemma, that is, the profit margin is too low and the technology content is lower. The workshop of machine parts processing is still the traditional assembly line. In such a production mode, the new generation of employees are also defined as equipment and cost, and the subjective initiative can not be developed. The old model is really out of date, and the new generation of employees are increasingly disgusted with these mechanical jobs. Therefore, automation and intelligent processing of mechanical parts are highly sought after in order to completely free the hands of human resources. Some large-scale products, such as automobiles and household appliances, are still basically automated. However, the manufacturing of products such as smart phones and iPads requires high precision. Current automation equipment can not make a soft one. If the wiring is installed correctly, we still have to resort to the precision machine parts machining plant.
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CNC machine tool coordinate direction discrimination rule
In order to simplify the way of CNC programming and ensure the exchange of recorded data. There are unified criteria for the naming of coordinates and targets of CNC machine tools in the world very early. In 1982, China formulated JB3051-82 “Naming of coordinates and moving targets of CNC machine tools“.
The right-hand Cartesian coordinate system is selected for the naming of the machine tool coordinate system in the unified constitution of the CNC machining criteria. X, Y and Z are used to represent the relationship between the linear feed coordinate axes, X, Y and Z coordinate axes. The right technique decides:
The circumferential feed coordinate axis revolving around the X, Y and Z axes is expressed in terms of A, B and C. According to the right hand helix rule, the target of + A, +B, +C is affirmed, as shown in the figure.
Some of the feeding activities of CNC machine tools are accomplished by the main axis initiating tool activities, and some are accomplished by the worktable with workpiece activities. Normally in programming, no matter whether the machine tool moves in the process or the workpiece is still moving, it will be the same if the workpiece is relatively stationary, while the tool is moving, and the statute cutter is far from the workpiece’s target as the coordinate of the positive target Z axis coincides with the spindle axis, and the tool is far from the workpiece’s target as the positive target (+Z); The axis is perpendicular to the Z axis and parallel to the clamping surface of the workpiece. If a single column milling machine is faced with the main axis of the tool, its right moving target is the positive target of the X axis (+X); the Y axis can be determined according to the right skills of the selected X axis and Z axis.
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How to reduce the scrap rate of parts in precision machining? The following is the understanding of precision workpiece CNC machining knitting, hoping to help you.
In the process of precision machining, the design of workpiece should be correct. In the process of design, it should be studied whether the processing is simple, whether the process and requirements meet the essential conditions of the workshop and market supply, whether the precision machining enterprises need to provide improved equipment, high precision processing equipment and inspection equipment. In terms of material usage, it is also important to calculate the raw materials required for each workpiece, process placement, and processing methods, and to comply with strict process requirements.
In precision machining, the first step of the processing staff is to see clearly the technical requirements of the drawings. Complying with the process is the basic of precision machining. Check the drawings of the parts are intact and accurate, and analyze the accuracy, surface integrity and technical requirements of the key surface of the parts under the existing production conditions. Therefore, in the timely and wonderful experience of mechanical processing, some people who have experience in mechanical processing may also wish to reduce the scrap rate of the workpiece.
To sum up, we should see through the technical requirements of the drawings; follow the process; select the appropriate speed feed; precisely select the tool angle; cut the workpiece to meet the requirements to complete the processing mission; accurate and practical measuring tools, comply with strict process requirements. Product quality is the key to decide the success or failure of enterprises, so it is not too late to reduce the scrap of precision machined workpieces and improve the quality of workpieces for every precision machined workshop. CNC Machining service
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These raw materials are used for manufacturing fixtures and fixtures, but different raw materials have different uses. Each kind of raw material has different characteristics. Follow me to get a general idea of the use of each kind of raw material.
1. A3, 45, the raw material is cheap, usually used in the motherboard without auxiliary fixture;
2. P20, CR12MOV, usually the important parts of fixture, because the selected raw materials can wear-resistant, will strengthen the service life of products, and ensure the accuracy of application;
3. The main raw materials of S136 are wear resistance and rust resistance. Usually used in welding fixtures is a common raw material.
4. SKD11 raw materials are usually used in checking tools and some sophisticated and wear-resistant fixtures.
5. Tungsten steel, this raw material is used a little bit less, because the cost of raw materials is quite expensive, usually used in meticulous inspection tools, mainly if the wear resistance and rust resistance is high
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The key factors affecting the cold working hardness of CNC parts are as follows:
1. Factor of machining raw materials: The hardness of processed raw materials is small, and the hardness level of raw materials with greater plasticity is more important.
2. Formal factors of cutters: the rake angle, edge roundness and wear of the back of the cutter in CNC machining have a great influence on the hardening layer. When the front angle decreases and the wear of the edge and rear edge increases, the depth and hardness of the hardened layer increases.
3. Cutting parameters of CNC parts: the change of cutting speed and feed rate has a great influence on cold work hardness. With the increase of cutting speed, the contact time between the tool and the workpiece is short, the plastic deformation level is small, and the hardness and hardness are reduced. With the increase of feeding speed, the plastic deformation level increases, and the surface cold hardening level increases.
Therefore, as long as the above factors are correctly prevented, there will be no problem of hardness in CNC machined parts.