News - Shenzhen Perfect Precision Product Co., Ltd. of page 9

Problems needing attention in machining difficult materials

Cutting is roughly divided into turning, milling and cutting based on Center teeth (end face cutting of drill bits and end mills, etc.), and the cutting heat of these cutting processes also has different effects on the tip. Turning is a continuous cutting, the cutting force borne by the tip has no obvious change, and the cutting heat acts on the cutting edge continuously; Milling is an intermittent cutting. The cutting force acts on the tip intermittently, and vibration will occur during cutting. The thermal effect on the tip is that the heating during cutting and the cooling during non cutting are carried out alternately, and the total heat is less than that during turning. The cutting heat during milling is an intermittent heating phenomenon, and the cutter teeth are cooled when not cutting, which will be conducive to the extension of tool life. The Japanese Institute of physics and chemistry has made a comparative test on the tool life of turning and milling. The cutting tools used for milling are ball end mills and turning are general turning tools. The cutting comparative tests are carried out under the same processed materials and cutting conditions (due to different cutting methods, the cutting depth, feed rate, cutting speed, etc. can only be roughly the same) and the same environmental conditions. The results show that milling is more beneficial to extending the tool life. When cutting with tools such as drills and ball end mills with central edges (i.e. parts with cutting speed =0m/min), the tool life near the central edge is often low, but it is still stronger than that during turning. When cutting difficult to machine materials, the cutting edge is greatly affected by heat, which often reduces the tool life. If the cutting method is milling, the tool life will be relatively long. However, difficult to machine materials cannot be milled all the time, and there will always be times when turning or drilling processing is required. Therefore, corresponding technical measures should be taken for different cutting methods to improve processing efficiency.

2024

02/27

How to define precision machining

7s words believes that the definition of precision machining is to complete the final processing of main surfaces according to steps and procedures, including workpiece parallelism, surface finish, surface perpendicularity, surface hardness, etc., so that the processing accuracy and surface quality of parts can meet the requirements of the drawing. 1. Parallelism requirements The so-called parallelism requirement is to require the tolerance around the workpiece. For example, for a rectangular workpiece, the thickness of the four corners of the workpiece is required to reach a certain tolerance range. If the thickness of the four sides cannot meet the tolerance requirements, the parallelism requirements cannot be met. This requires readjusting the workpiece. The problem may occur in the suction cup of the grinder. The suction cup is worn due to excessive use, resulting in parallelism errors; It may also be that the grinding wheel is not repaired well, or the grinding wheel has cracks and gaps. At this time, it is necessary to regrind the grinding wheel; It may also be that the suction cup is not cleaned, so it is necessary to clean the suction cup again and carefully; It may also be that the workpiece is not trimmed well and burrs appear. 2. Verticality requirements The so-called perpendicularity requirement is to require the side and ground of the workpiece to meet the tolerance requirements. The best understanding is the proper body. From the number axis, it is divided into XYZ three sides. Generally, XZ and YZ are required to meet the tolerance requirements. The error is also roughly consistent with the requirements of parallelism. Generally, it can be handled according to the requirements of parallelism. 3. Other requirements For example, finish. It is required to achieve, such as mirror effect, etc.

2024

02/27

Cutting conditions of 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, at present, the cutting of difficult to machine materials has entered the period of high-speed machining and long-life tools. Now, the machining method of using small cutting depth to reduce the load on the cutting edge of the tool, so as to improve the cutting speed and feed speed, has become the best way to cut difficult to machine materials. Of course, it is also very important to choose tool materials and tool geometry that adapt to the unique properties of difficult to machine materials, and we should strive to optimize the cutting path of the tool. 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 from staying on the cutting edge. Therefore, discontinuous cutting should be used as far as possible to avoid friction and heat generation between the cutting edge and the cutting surface, which will help to prolong the tool life and ensure the stability of cutting. When rough machining difficult materials with ball end milling cutter, the tool shape and fixture should be well matched, which can improve the swing accuracy and clamping rigidity of the cutting part of the tool, so as to ensure that the feed rate per tooth is maximized under the condition of high-speed rotation, and at the same time, it can also extend the service life of the tool.

2024

02/27

How to choose the right tool when processing aluminum

Due to the special characteristics of aluminum, no matter what machine tool is used, the efficiency, service life and workpiece gloss are often unsatisfactory. Therefore, how to choose the appropriate cutting tools and processing technology when processing aluminum has become a matter of concern. Let's first understand the processing characteristics of lower aluminum and aluminum alloy: aluminum has low strength, low hardness and high plasticity, which is suitable for plastic forming processing, but it tends to be deformed and strengthened during cutting, and it is easy to stick the knife, so it is difficult to process a smooth surface. Compared with pure aluminum, aluminum alloy has much higher strength and hardness, but compared with steel, it has low strength and hardness, small cutting force and good thermal conductivity. Due to the soft nature and large plasticity of aluminum alloy, it is easy to stick to the tool during cutting, forming chip nodules on the tool. During high-speed cutting, fusion welding may occur on the blade, causing the tool to lose its cutting ability and affecting the machining accuracy and surface roughness. In addition, the thermal expansion coefficient of aluminum alloy is large, and the cutting heat is easy to cause the thermal deformation of the workpiece and reduce the machining accuracy.

2024

02/27

Three machining methods of boring

1. Boring on lathes with workpiece rotating and cutting tool feeding motion mostly belongs to this boring method. The process features are: after machining, the axis line of the hole is consistent with the rotation axis of the workpiece, the roundness of the hole mainly depends on the rotation accuracy of the machine tool spindle, and the axial geometric error of the hole mainly depends on the position accuracy of the tool feed direction relative to the rotation axis of the workpiece. This boring method is suitable for machining holes with coaxiality requirements with the cylindrical surface. 2. When the tool rotates, the workpiece makes feed motion. The boring machine spindle drives the boring tool to rotate, and the worktable drives the workpiece to make feed motion. 3. The tool rotates and makes feeding motion. This boring method is adopted for boring. The overhang length of the boring bar is variable, and the force deformation of the boring bar is also variable. The aperture near the spindle box is large, and the aperture away from the spindle box is small, forming a conical hole. In addition, with the increase of the hanging length of the boring bar, the bending deformation of the main shaft caused by its own weight will also increase, and the axis of the machined hole will produce corresponding bending. This boring method is only suitable for machining shorter holes.

2024

02/27

Application range and advantages of POM materials in injection molding

Application range and advantages of POM materials in injection molding 1. Introduction to POM material: Polyoxymethylene (POM) is an engineering plastic with excellent physical properties and chemical stability, which is widely used in injection molding. 2. Features of POM material: POM has high hardness, high rigidity, low friction coefficient, excellent wear resistance and chemical corrosion resistance, making it an ideal material for injection molding. 3. The application of POM materials in automobile manufacturing: POM materials are often used in the manufacture of auto parts, such as gears, bearings, fuel injectors, etc. of the transmission system, which have the characteristics of wear resistance, corrosion resistance and low noise. 4. Application of POM materials in the manufacture of electronic products: POM materials are widely used in connectors, switches, sockets and other components of electronic products, and have excellent electrical insulation properties and high-temperature resistance. 5. Application of POM materials in the manufacture of household items: Household items made of POM materials, such as door handles, faucets, cabinet handles, etc., are wear-resistant, corrosion-resistant and durable. 6. Advantages and development prospects of POM materials: POM materials have good mechanical properties, chemical stability and processing performance, and have broad application prospects in injection molding in the future.

2024

02/27

Injection molding technology is increasingly used in manufacturing

2024

02/27

Advantages of mill-turn technology include

Mill-turn technology, a highly advanced machining process, offers numerous advantages that have revolutionized the manufacturing industry. Chief among these is its ability to perform both milling and turning operations in a single setup, greatly enhancing efficiency and productivity. One key advantage is precision. Mill-turn machines are equipped with high-precision cutting tools and advanced numerical control systems, enabling them to achieve exceptional accuracy in complex shapes and geometries. This precision is crucial in industries such as aerospace and medical where parts must meet strict tolerances. Moreover, mill-turn technology reduces production time and costs. By eliminating the need for multiple machines and setups, it simplifies the manufacturing process, reduces material waste, and minimizes the potential for human error. This not only saves money but also speeds up the time to market for new products. Additionally, mill-turn machines are highly versatile. capable of handling a wide range of materials and part sizes. This flexibility allows manufacturers to produce a diverse array of products without investing in multiple specialized machines. In conclusion, mill-turn technology offers precision, efficiency, cost-savings, and versatility, making it an invaluable tool for modern manufacturers. Its widespread adoption across various industries is a testament to its numerous advantages.

2024

02/27

The process of machining stainless steel

Machining stainless steel is a common manufacturing process used to perform machining operations such as cutting, milling, drilling, etc. on stainless steel materials to create parts or products of the desired shape and size. The process of machining stainless steel is similar to machining other metal materials, mainly including the following steps: Material preparation: choose a suitable stainless steel material, usually a stainless steel alloy with better corrosion resistance, such as 304, 316, etc. Make sure the surface of the material is clean, and carry out the necessary fixing and clamping to ensure stability during processing. Tool selection: Select the appropriate tool according to the processing requirements and the characteristics of the stainless steel material. Stainless steel has high hardness and wear resistance, so cemented carbide tools with good cutting performance are usually selected. Processing parameter setting: According to the hardness and processing requirements of the stainless steel material, set the appropriate processing parameters, such as cutting speed, feed speed, cutting depth, etc. The selection of these parameters needs to be adjusted according to the specific situation to ensure the processing effect and workpiece quality. Processing operations: According to processing requirements and design drawings, use machine tools for cutting, milling, drilling and other operations. During machining, it is necessary to ensure good lubrication and cooling of the tool and workpiece to prevent overheating and tool wear. Inspection and adjustment: After machining is complete, the machined part is inspected to ensure that its dimensions, surface quality and geometry meet the requirements. Make necessary adjustments and corrections, if necessary. The key to machining stainless steel is to select appropriate tools and processing parameters to overcome the hardness and wear resistance of stainless steel materials and ensure processing efficiency and workpiece quality. At the same time, attention should be paid to lubrication and cooling during processing to improve the cutting effect and prolong tool life.

2024

02/27

The difference between aluminum and stainless steel?

Aluminum and stainless steel are two common metallic materials that have some distinct differences in their properties and applications. Composition: Aluminum is a chemical element with the chemical symbol Al, while stainless steel is an alloy mainly composed of iron, chromium and other elements. Density: Aluminum has a low density of about 2.7 grams per cubic centimeter and is relatively light. The density of stainless steel is higher, about 7.9 grams per cubic centimeter. Corrosion resistance: Stainless steel has good corrosion resistance and can resist the erosion of corrosive media such as oxidation, acidity and alkalinity. Aluminum will form an oxide film in the air, which has a certain anti-corrosion effect, but it is easily corroded in some acidic environments. Strength: Stainless steel has high strength, especially heat-resistant and corrosion-resistant stainless steel, which has good mechanical properties. Aluminum has relatively low strength, but its strength can be increased through alloying and heat treatment. Conductivity: Aluminum has good electrical conductivity and is widely used in power transmission and electronics manufacturing. The conductivity of stainless steel is poor and usually requires special treatment to achieve a certain conductive effect. Application fields: Aluminum is often used in aerospace, automobile, construction, packaging and other fields, especially suitable for occasions with lightweight design and high conductivity requirements. Stainless steel is widely used in construction, chemical industry, food processing, medical equipment, and other fields, and is mainly used in occasions requiring corrosion resistance and strength. In general, aluminum has the characteristics of lightweight, good electrical conductivity, and machinability, while stainless steel has high strength and corrosion resistance. According to the specific application requirements and material performance requirements, the best effect can be achieved by selecting the appropriate material.

2024

02/27

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

Problems needing attention in machining difficult materials

How to define precision machining

Cutting conditions of difficult to machine materials

How to choose the right tool when processing aluminum

Three machining methods of boring

Application range and advantages of POM materials in injection molding

Injection molding technology is increasingly used in manufacturing

Advantages of mill-turn technology include

The process of machining stainless steel

The difference between aluminum and stainless steel?

CNC Turning Parts

CNC Milling Parts

CNC Turning Milling Parts

CNC Machined Aluminum Parts

CNC Stainless Steel Parts

Machining Plastic Parts

CNC Brass Parts