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

In this era of more and more developed technology, precision machining has become an indispensable mechanical equipment for people in industry, but how much do you know about the process of precision machining? Next, follow Xiaobian to learn about it. First, the surface after the hole The box, bracket and connecting rod and other parts should be processed before the plane processing hole. In this way, the plane can be positioned to process the hole, to ensure the accuracy of the plane and the hole orientation, and to bring convenience to the processing of the hole on the plane. Two, first processing datum Parts in the process of processing, as the positioning of the appearance of the benchmark should be first processed out, in order to supply fine benchmark for the processing of the subsequent process as soon as possible. This is called "baseline first." Three, finishing processing The finishing processing of the primary appearance (such as grinding, honing, grinding, rolling, etc.) should be carried out in the final stage of the process road. The surface finish after processing is above Ra0.9um, and the slight knock will damage the appearance. In Japan, Germany and other countries, after finishing processing, flunnel cloth should be used for maintenance, and it is definitely prohibited to touch the workpiece directly with your hand or other objects. Avoid the appearance of finishing, which may be damaged by inter-process transfers and devices. Four, distinguish the processing stage Processing the appearance of high quality requirements, are divided into processing stages, generally can be divided into rough processing, semi-finishing and finishing three stages. The first is to ensure the quality of processing; Conducive to rational use of equipment; Easy to organize heat treatment process; And when it is convenient to find the blank shortcomings.

Now there are a lot of manufacturers are using precision parts processing, save a lot of labor, but the efficiency is not very good, how can we improve the efficiency? And Xiaobian together to learn about it. Non-standard equipment parts processing needs to get super lubricated processing surface and high processing accuracy, which requires a high standard life of the knife, the tool is not worn, will be based on the processing surface quality is not reduced out of tolerance. The standard life of diamond tool is very high, and the tool wear is very slow in high-speed cutting. Therefore, in ultra-precision cutting, the cutting speed is not restricted by the tool life, which is different from the general cutting rules. The cutting speed selected in the machining practice of non-standard equipment parts is often selected according to the dynamic characteristics of the ultra-precision machine tool and the dynamic characteristics of the cutting system, that is, the speed with the least vibration is selected. At this speed, the surface roughness is the smallest and the machining quality is the highest. Obtain high quality non-standard machining surface non-standard equipment parts processing the first question. The use of good quality, especially good dynamic characteristics, small vibration of the ultra-precision machine tools can use high cutting speed, can travel processing power. The selection of machining parameters of non-standard equipment parts mainly includes the selection of cutting tool view point, cutting speed, cutting depth and feed speed. From previous experience, we know that when processing plastic data, if the tool with a larger front Angle is selected, it can be useful to control the formation of chip nodules. This is because when the front Angle of the tool increases, the cutting force decreases, the cutting deformation is small, the contact length between the tool and the chip becomes shorter, and the foundation of chip nodules is reduced.

In today's more and more developed society, precision machining has been widely used by the majority of people, but do you know the production process of precision machining? Follow me to learn about it. 1, from the hardware point of view, the processing of mechanical parts is required to have many kinds of mechanical equipment, such as car, milling machine, planer, grinder, broaching machine processing center, etc., the inherent processing accuracy of all kinds of equipment are not the same, so to achieve precision machining, it is necessary to see how high the accuracy of your parts and choose the corresponding process route and equipment; 2. From the software point of view, it is the skills of the operator, which involves the operation skills of the operators of various equipment. These skills include the in-depth understanding of the equipment, the understanding of the mechanical processing, the understanding of the processing parts and materials, etc. These skills can be accumulated slowly from the usual work In the process of production, the process of changing the shape, size, position and nature of the object of production, so that it becomes a finished product or semi-finished product is called the process. It is a major part of the production process. The process can be divided into casting, forging, stamping, welding, machining, assembly and other processes. The process of mechanical manufacturing generally refers to the sum of the mechanical processing process of parts and the assembly process of the machine. The other processes are called auxiliary processes, such as transportation, storage, power supply, equipment maintenance and so on. The process is composed of one or several sequential processes, and a process is composed of several working steps. Process process is the basic unit of machining process. The so-called process refers to a (or a group of) workers, in a machine tool (or a working place), on the same workpiece (or several workpiece at the same time) to complete the part of the process. The main characteristic of a process is that it does not change the processing object, equipment and operator, and the content of the process is completed continuously   The working step is under the condition that the machining surface is unchanged, the machining tool is unchanged and the cutting quantity is unchanged Walking knife is also called working stroke, is a machining tool on the processing surface of a completed processing step. The development of mechanical processing process, must determine the workpiece to go through several processes and the sequence of the process, only the name of the main process and the processing sequence of the brief process, known as the process route.

With the development of The Times, precision machining is becoming more and more important in people's life, so what are the requirements of precision machining for materials? Follow me to learn about it.  Precision machining, not what materials can be precision machining, some material hardness is too large, more than the hardness of the machining parts, it may break the parts, so these materials are not suitable for precision machining, unless it is made of special materials, or laser cutting. Materials for precision machining are divided into two categories, metallic materials and non-metallic materials. For metal materials, the hardness of stainless steel is the greatest, followed by cast iron, followed by copper, and finally aluminum. The processing of ceramics, plastics and so on belongs to the processing of non-metallic materials. 1. First of all, the hardness of the material is required. For some occasions, the higher the hardness of the material is, the better it is. 2. Secondly, the material hardness is moderate, at least a grade lower than the hardness of the parts, but also to see what the role of the processing of the device is to do, reasonable material selection of the parts. In short, precision machining has some requirements on the material, and not what material is suitable for processing, such as too soft or too hard material, the former is not necessary to process, and the latter is unable to process. Therefore, the most basic one is that we must pay attention to the density of the material before processing. If the density is too large, the hardness is also large. If the hardness exceeds the hardness of the machine parts (lathe tool), it can not be processed. Therefore, generally speaking, for mechanical processing, the material material should be lower than the hardness of the machine knife, so as to be processed.

With the development of the era is getting faster and faster, there are a lot of mechanical equipment that did not appear in the society before, which also represents the era of more and more high-tech, the precision machining in the factory has been updated recently, but what do you need to pay attention to in the process of processing? Follow me to learn about it. 1. Precautions for CNC processing   (1) when the workpiece is too high, it should be layered with a knife of different lengths. After using a large knife to open the rough, it should be removed with a knife.   (2) The application of flat knife processing plane, ball knife less, in order to reduce the processing time; If there is an incline and it is an integer, use an incline cutter.   (3) Set tolerances reasonably, so that the machining accuracy and computer calculation time balance each other, do more procedures, reduce the empty tool time.   (4) High hardness of blank material, choose inverse milling; Blank material hardness is low, choose down milling. Rough milling and finish milling.   (5) The tool material has good toughness and low hardness for rough machining, and the tool material has poor toughness and high hardness for finishing. 2. CNC machining technology   (1) Part clamping method and fixture selection   CNC machine tool processing is processed parts of the clamping method should also be a reasonable choice of positioning datum and clamping scheme, in the fine datum selection, generally to follow the "benchmark unified" and "benchmark overlap" these two principles, in addition to these two principles, we also consider:   a. As far as possible, all surfaces should be machined in a single positioning clamp. Therefore, positioning methods should be selected to facilitate the processing of each surface.   b. When the workpiece is clamped once, it should be able to complete the processing of all the surfaces of the workpiece.   c. When determining the position of the workpiece on the workbench, the influence of the length of the tool and the stiffness of the tool on the machining quality should be taken into account.   d. Jig used in controlled processing should be selected as far as possible by general components assembled, and can be adjusted to shorten the production preparation cycle. (2) Arrangement of processing sequence   When arranging the processing sequence, the basic principles must be followed, including "first surface after hole", "first rough after fine", etc. In addition to these basic principles, we should also follow the following principles, for:   a. Process the tool in a centralized manner to avoid repeated use of the same tool and reduce The Times and time of tool change.   b. For hole systems with high coaxiality requirements, the machining of the hole systems with other coordinate positions should be completed after one time positioning, so as to eliminate errors caused by repeated positioning and improve the coaxiality of hole systems.   c. Select and determine the tool point and the tool change point. Once the tool point is determined, it should not be replaced.

With the use of precision machining, the application in industry, but also more, it is because of this, many people will use it for processing, in order to achieve better results, then precision machining parts when you need to pay attention to what? Let's learn more about the following. 1, when finding the workpiece. Only allowed to use the hand plate to move the chuck or open the lowest speed to find the right, not allowed to open the high speed to find the right. 2, change the spindle rotation direction. To stop the spindle first after the stop, not allowed to suddenly change the direction of rotation   3、When loading and unloading the chuck. Only allowed to use the hand to turn the v-belt drive spindle rotary line, absolutely stop directly open the machine tool to force loosening or tightening. At the same time to pad a board on the bed, to avoid the onset of unpredictable. 4, tool installation. Should not extend too long, shim to be level, width and tool bottom width divergence. 5, hardware parts processing in. Not allowed to open the reverse car approach to brake the spindle rotation. 6、Rotary hexagonal lathe.   (1)Not allowed to process bending, rough appearance of the bar material. (2) When loading material, the material head must be aligned with the chuck hole and struck into it quietly, no messy knocking. 7、Program-controlled turning lathe. According to the request of fine hardware parts processing process, stop the pre-selection of items such as spindle speed, tool holder feed, tool holder trajectory and continuous offside of work step program. Put the electrical knob in the position of "adjusting" to stop the test drive, and after confirming that there is no problem, then put the electric rotary in the automatic or semi-automatic position to stop working.

Many things, it is divided into a variety of ways, can be better for our selection, can be for our choice, we can choose their own suitable according to their actual situation, precision parts processing is also the same, then several ways of precision parts processing is divided into which kinds? Precision parts processing processes are turning, milling, planing, grinding, clamping, stamping, casting and other ways. Stamping: stamping using pre-made molds with punching machines for cold punching processing, mainly for sheet metal processing, that is, processing of materials are mostly plates, processing efficiency is relatively high for mass production.   And the precision hardware processing process is divided into engineering die and, continuous die, engineering die is also called single punch die, some more complex parts to use several sets of molds, and continuous die in the mold cavity will be the shape of the product split several parts in a mold, so that the punch machine processing a stroke is a finished product. High-speed continuous punching machine can process three to four hundred products per minute. Lathe: lathe for precision parts processing belongs to precision processing machinery, there are divided into ordinary lathe, automatic lathe, instrument lathe and computer lathe. It carries out rotary motion by holding the material in place and the radial or axial processing is carried out by the turning tool. Nowadays, automatic lathes and computerized lathes are more and more widely used. Because both of them are fully automatic processing, the accuracy error produced by human operation is reduced to the lowest point, and the processing speed is fast and used for mass production. Nowadays, most of the computer lathes are equipped with side rotary tools and back rotary tools, which means that the lathe can also perform milling processing.

In the industry, there are many places to use computer gong processing, because it is processed, is very wide, so people will often use it to process, then in the process of processing, computer gong processing line principle is in accordance with what requirements? Let me tell us the following. ① should be able to ensure the accuracy and surface roughness of the machined workpiece. ② make the shortest processing route, computer gong processing|Dongguan computer gong processing|High-speed CNC machining|Machinery parts machining|CNC machining to reduce the empty travel time and improve processing efficiency.   ③Simplify the workload of numerical calculation and simplify the processing procedure as much as possible. ④For some reused procedures, subroutines should be used. ④It is possible to process complex type surfaces that are difficult to process by conventional methods, and even to process some processing parts that cannot be observed.

No matter what technology is used, to process, there are their own considerations, we need to take into account these issues, so that their own processing, to complete the better, so that there will be no problems as well as trouble, computer gong processing is also the same, then computer gong processing in the programming to consider what problems! 1, carefully analyze the drawings, to determine a reasonable process route. 2, the size of the tool specifications to be selected, and the actual dimensions measured to fill in the tool card. 3、Determine the reasonable cutting dosage. Mainly the spindle speed, back draft, feed rate, etc. 4. Enough space should be left for automatic tool change to avoid collision with the workpiece or fixture. The tool change position is recommended to be set at the origin of the machine tool. 5、For the convenience of checking and debugging program, and the main program mainly completes the tool change and subroutine call. This procedure is simple and clear. 6, the program to be programmed to check and test run, pay attention to whether there is interference between the tool, fixture or workpiece. When checking M, S, T function, it can be done in Z-axis locked state.

Precision machining tells you the difference between hand board and first board! And how to avoid the accident of crashing knives in CNC machining! Essentially, the hand board and the first board is the same, belong to the engineering model prototype, and through the computer way to draw out, however, there are subtle differences between the two. The word "hand board" originated in the 1990s and was introduced from Taiwan. Handboard is also divided into oil clay handboard and plaster handboard, when the industrialization process is relatively backward, 90% of the process needs to rely on hand to complete, so it is called handboard. However, due to the long production period and the immaturity of the process, it was difficult to apply color, so the handboard was limited to the shape of the product. And the first board, as the name implies, in the "first" word, the meaning. With the gradual maturation of industrialization, the hand board and the first board gradually assimilated into two general terms, to today, the hand board is divided into: SLA hand board and CNC hand board, the obvious difference between the two manifested in the processing method, the former is to increase the consumption of processing, the latter is to reduce the consumption of processing. The incident of knife collision is traceable. After actual testing, due to the difficulty and high cost of machining center maintenance, and processing parts mainly rely on machine precision to ensure that once the equipment accident, machine precision will be seriously reduced. In fact, to avoid the method is also very simple, in the simulation of machining before, should first confirm whether the machine is locked. Again, after the empty run simulation to check whether to return to the reference point, because in the inspection program, the coordinates do not match the actual position, this time must be used to return to the reference point to ensure the consistency of the coordinates. In the specified line of operation, in Dongguan CNC machining center must first call the coordinate system such as machining center must first call the coordinate system such as G54 and the length compensation value of the knife. Because the length compensation value of each knife is not the same, if not called may also cause a collision knife.