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

The role of precision machining processes

First, is the main technical documents to guide the production Machining workshop production planning, scheduling, workers' operations, parts processing quality inspection, processing cost accounting, are based on the process procedures. To deal with production problems, but also often to process procedures as a common basis. Such as dealing with quality accidents, should be in accordance with the process procedures to determine the responsibility of the relevant units, personnel. Second, is the main basis for the production of preparatory work Workshop to produce new parts, first of all, to develop the parts of the machining process procedures, and then according to the process procedures for production preparation. Such as: the new parts processing process in the analysis of key processes; preparation of the required tools, clamps, gauges; procurement of raw materials and blanks or manufacturing; the purchase of new equipment or old equipment modification, etc., must be carried out according to the process. Third, is the basic technical documents of the new machinery manufacturing plant When the new batch or high-volume mechanical processing workshop, should be based on the process regulations to determine the type and number of machine tools required and the layout in the workshop, and then from there to determine the size of the workshop area, power and lifting equipment configuration and the type of workers required, technical grade, quantity, etc.

2022

12/14

Demystify how precision machining should be defined

We may have a different understanding of precision machining. How to understand precision machining? How to define Precision Machining? What is the definition of precision machining? I think: the definition of precision machining is, according to the steps, according to the process to complete the final processing of each major surface, including the parallelism of the workpiece, surface finish, surface perpendicularity, surface hardness, etc., so that the machining accuracy of the part and the quality of the machined surface to meet the requirements of the drawings of the process. Parallelism requirement The so-called parallelism requirement is to require the tolerance requirements around the workpiece, let's say a rectangular workpiece, the thickness of the four corners of the workpiece is required to reach a certain tolerance range. If the measured thickness of the four sides does not meet the tolerance requirements, then the parallelism requirements are not met. This requires readjustment of the workpiece, the problem may arise in the grinding machine suction cups, suction cups due to overuse, wear and tear, resulting in errors in parallelism; it may also be that the grinding wheel is not dressed, or the grinding wheel chipped, chipped, this time to re-grind the grinding wheel; it may also be that the suction cups are not cleaned, which requires re-cleaning the suction cups, carefully clean; it may also be that the workpiece is not dressed, burrs. Perpendicularity requirement The so-called verticality requirement is to require the side of the workpiece and the ground to meet the tolerance requirements. The best understanding is justified body, from the number of axes, divided into XYZ three sides, generally required XZ, YZ to meet the tolerance requirements. The error is also roughly the same as the parallelism requirement. Generally according to the parallelism requirements to deal with then. Other requirements Such as, the degree of finish. Then the requirements to achieve, such as mirror effect, etc.

2022

12/12

Problems to be noted in the cutting of difficult-to-process materials

Cutting processing is roughly divided into turning, milling and center tooth-based cutting (drill, end mill end cutting, etc.), the cutting heat of these cutting processes on the tip of the cutting edge is also different. Turning is a kind of continuous cutting, the cutting force at the tip of the cutting edge does not change significantly, the cutting heat acts continuously on the cutting edge; milling is a kind of intermittent cutting, the cutting force is intermittently acting on the tip of the cutting edge, vibration will occur when cutting, the tip of the cutting edge is affected by the heat, the cutting heat and non-cutting cooling alternately, the total heat is less than when turning. The cutting heat during milling is a kind of intermittent heating phenomenon, and the tool teeth are cooled during non-cutting, which will contribute to the extension of tool life. Japan Institute of Physical and Chemical Research of turning and milling tool life for comparative testing, milling tools used for ball end mill, turning for general turning tools, both in the same processed materials and cutting conditions (due to different cutting methods, depth of cut, feed, cutting speed, etc. can only be roughly the same) and the same environmental conditions for cutting comparison test, the results show that milling processing to extend tool life is more The results show that milling is more beneficial to prolong tool life. When cutting with tools such as drills and ball end mills with a central edge (i.e., the part with cutting speed = 0 m/min), the tool life near the central edge is often low, but it is still better than when turning. In cutting difficult-to-machine materials, the cutting edge is affected by heat, often reducing tool life, cutting method such as milling, the tool life will be relatively long. However, difficult-to-machine materials can not be used from start to finish all milling, there will always be a need for turning or drilling in the middle of the time, therefore, should be for different cutting methods, take the appropriate technical measures to improve processing efficiency.

2022

12/12

Cutting conditions for difficult-to-machine materials

The cutting conditions of difficult-to-machine materials have always been set relatively low. With the improvement of tool performance, the emergence of high-speed and high-precision CNC machine tools, and the introduction of high-speed milling methods, the cutting of difficult-to-machine materials has now entered a period of high-speed machining and long tool life. Now, the use of small depth of cut to reduce the cutting edge load of the tool, so that the cutting speed and feed rate of the processing method can be increased, has become the best way to cut difficult-to-machine materials. Of course, the choice of tool materials and tool geometry to adapt to the unique properties of difficult-to-machine materials is also extremely important, and should strive to optimize the tool cutting trajectory. For example, when drilling stainless steel and other materials, due to the low thermal conductivity of the material, it is necessary to prevent a large amount of cutting heat retained on the cutting edge, for which interrupted cutting should be used as far as possible to avoid frictional heating of the cutting edge and cutting surface, which will help extend the life of the tool and ensure the stability of cutting. When roughing difficult-to-machine materials with ball end mills, the shape of the tool and fixture should be well matched, which can improve the vibration accuracy and clamping rigidity of the cutting part of the tool, in order to ensure that the feed per tooth is increased to the maximum under high-speed rotary conditions, and also to extend the tool life.

2022

12/12

Cutting fluid precautions

2022

12/12

How to choose the right tool when machining aluminum

Due to the special characteristics of aluminum, no matter what kind of machine tool is used for machining, the efficiency, life and gloss of the workpiece are often not satisfactory. Therefore, when processing aluminum, how to choose the right tool and processing technology has become a concern. Let's first understand the processing characteristics of aluminum and aluminum alloy: aluminum has low strength, low hardness and plasticity, which is suitable for plastic forming processing, but the tendency of deformation and reinforcement during cutting is large, easy to stick to the tool, and it is difficult to process a bright and clean surface. Compared with pure aluminum, aluminum alloy has improved a lot in strength and hardness, but compared with steel, it has low strength and hardness, small cutting force and good thermal conductivity. Because of the soft quality and plasticity of aluminum alloy, it is easy to stick to the tool when cutting and form chip tumor on the tool, and may produce melt welding phenomenon on the tool edge when cutting at high speed, which makes the tool lose cutting ability and affects the machining accuracy and surface finish. In addition, the coefficient of thermal expansion of aluminum alloy is large, and the cutting heat is likely to cause thermal deformation of the workpiece and reduce the machining accuracy.

2022

12/12

Boring can be done in three different ways

(1) The workpiece rotates and the tool makes a feeding motion. Most of the holes are bored on lathes in this way. The roundness of the hole mainly depends on the rotary accuracy of the machine tool spindle, and the axial geometry error of the hole mainly depends on the position accuracy of the tool feed direction relative to the rotary axis of the workpiece. This boring method is suitable for machining holes with coaxiality requirements on the outer surface. (2) Tool rotation and workpiece feeding motion The boring machine spindle drives the boring tool rotation and the table drives the workpiece feeding motion. (3) Tool rotation and feed motion With this boring method, the overhang length of the boring bar varies, and so does the force deformation of the bar, with a large diameter near the spindle box and a small diameter away from the spindle box, forming a tapered hole. In addition, as the overhang of the boring bar increases, the bending deformation of the spindle due to its own weight increases, and the axis of the hole to be machined will be bent accordingly. This boring method is only suitable for short holes.

2022

12/12

Factors affecting the accuracy of precision parts machining

As we all know, the reason why the processing of precision parts is called precision machining, precisely because of its processing procedures and process requirements are very high, the precision requirements of the product is very high, and the precision of the processing of precision parts contains the accuracy of the location, size accuracy, shape accuracy, etc., Rui Sheng Technology General Manager combined with the company's more than 10 years of production and processing experience for us to summarize the following impact on the precision of precision parts processing Factors. (1) the machine tool spindle rotation runout can produce a certain error on the machining accuracy of the parts. (2) the accuracy of the machine tool guide inaccuracy can also lead to precision parts processing workpiece shape error. (3) transmission components can also lead to errors in the processing of the workpiece, which is also the most important factor in the production of the workpiece surface error. (4) tool, fixture type of different will also have different degrees of impact on the accuracy of the machined workpiece. (5) In the process of machining and cutting due to changes in the location of the force point will lead to deformation of the system, resulting in differences, can also make the accuracy of the workpiece to produce different degrees of error. (6) The size of the cutting force is different, which can also lead to the accuracy of the workpiece being affected. (7) the process system by heat deformation caused by the error, machining process, the process system will be in the role of various heat sources to produce a certain amount of thermal deformation. (7) process system deformation caused by heat often leads to the accuracy of the workpiece is affected. (8) The deformation of the machine tool by heat will lead to the deformation of the workpiece. (9) Heat deformation of the tool can have a great impact on the workpiece. (10) The workpiece itself is deformed by heat, mainly in the cutting process

2022

12/12

How to improve the quality of precision parts machining

Precision parts processing needs to produce high quality and stable products, so how to improve the quality of precision parts processing in the production process? The following by the editor to answer for everyone. First of all, the staff must have a wealth of mechanical processing work experience as well as excellent technology. Mechanical processing must have excellent technology to do a good job, it is known that mechanical processing is as fine as the work. Very test production process, even if you can do a good job, it will take a long time, if you do not start well at the beginning, it is very easy to give up. Secondly, whether the processing process is standardized and excellent also determines whether the product is of high quality. This is also an indispensable reference point when we use to develop company rules and regulations. Production and management are bound to need a perfect set of processes, the process is to make the perfect product and service. Once again, the production process must focus on communication, whether it is the node time or when there are problems, to strengthen communication, processing plants and equipment manufacturers to communicate is an important condition for good automation equipment parts processing. Processing personnel are usually in accordance with the drawings to carry out processing work, but more often than not, many process premises can be simplified and improved, both to reduce costs and to improve efficiency.

2022

12/12

Surface treatment process for precision parts

Precision parts in the actual work of the strength and toughness requirements are relatively high, its work performance and service life and its surface performance has a great connection, and surface performance, is unable to rely solely on the material to do, is also very uneconomical practice, but the actual processing must be made to meet the performance standards, it is necessary to use the surface treatment technology, which can often achieve twice the result with half the effort! In recent years, this technology has also been rapid development. In the field of mold surface treatment mold polishing technology is a very important link, but also an important process in the processing of the workpiece. The surface treatment process of precision parts is very important in the process, so what are the surface treatment process of precision parts? It is worth reminding, precision parts of the mold surface polishing treatment work, not only received only the process process and polishing equipment, but also by the parts material mirror degree, which is not enough attention in the processing now, which is also to show that the polishing itself is affected by the material. Although now improve the surface performance of precision parts processing technology continues to innovate and upgrade, but the most used in precision parts processing or mainly for hardening film deposition, and nitriding, carburizing technology. Because nitriding technology can obtain a very high level of surface performance, and nitriding technology process and precision parts in the steel quenching process has a very high degree of coordination consistency, and the temperature of nitriding is very low, so that after the treatment of nitriding technology does not require intense cooling process, so the deformation of precision parts will be very small, so nitriding technology is also used in the processing of precision parts to strengthen Nitriding is one of the earliest technologies used to strengthen the surface properties of precision parts, and is also the most widely used at present.

2022

12/12

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

The role of precision machining processes

Demystify how precision machining should be defined

Problems to be noted in the cutting of difficult-to-process materials

Cutting conditions for difficult-to-machine materials

Cutting fluid precautions

How to choose the right tool when machining aluminum

Boring can be done in three different ways

Factors affecting the accuracy of precision parts machining

How to improve the quality of precision parts machining

Surface treatment process for precision parts

CNC Turning Parts

CNC Milling Parts

CNC Turning Milling Parts

CNC Machined Aluminum Parts

CNC Stainless Steel Parts

Machining Plastic Parts

CNC Brass Parts