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What is Metal Finishing Process & How Does it Work – Finishing Services
2023-05-25
0
Metal finishing or metal finishes, is the process of utilizing different techniques to alter the surface of an object, for improving the appearance and properties like corrosion resistance, tarnish resistance, chemical resistance, wear resistance, and hardness, modifying electrical conductivity, removing burrs or applying specific colors to the machined components. It usually through adding a layer of metal or non-metal coating on the exterior of a metallic workpiece, which can also clean the part at the same time. The metal surface finishing services commonly applied on various CNC machining parts made of aluminum, stainless steel, brass and more materials.Benefits of Metal Finishing ProcessThe functions of metal surface treatment can be summarized as follows:– Improve the appearance– Add specific beautiful colors– Change the luster– Enhance chemical resistance– Increase wear resistance– Limit effects of corrosion– Reduce friction– Remove surface defects– Cleaning the parts– Serve as a primer coat– Adjust the sizesDifferent Types of Metal Finishes – Metal Surface Finishing Services Available at BellflowerDo you want your CNC parts to be more corrosion-resistant or get a specific look? .bftprecision Metal finishing service is an essential choice to achieve your design perfectly. .bftprecision  is an accomplished finished parts manufacturer, our workers and craftsman are capable to provide precision CNC machining services and a wide range of finishing services including aluminum anodizing, painting, passivation, electroplating, powder coating, polishing, black oxide, conversion coating, abrasive blasting, etc. Here are the introductions to different types of metal finishes, more details please feel free to contact us.How to choose surface finishingIf the customer is super-rich, of course, he can choose any surface treatment method he wants. If the customer lives in the real world, he needs to choose a surface treatment method with good cost and effect according to local conditions.When determining the surface treatment method of the part, the function, cost, and aesthetics of the part must be considered as the standard.Among these three factors, the function is the most important. It is necessary to consider how the surface treatment affects the strength of the material, how the durability of the material surface limits the surface treatment, and establish the applicable tolerance type. Followed by cost and appearance.Through the analysis of product components, the treatment method of each surface can be determined. Contact bftprecision and the engineers will answer all the questions customers have.What can bftprecision provide?BFT has a variety of equipment and trusted partners, which can achieve various surface treatments customers need. If the customer is hesitant to choose between various surface treatments, BFT engineering team can analyze the product design and customize an economical surface treatment under the premise of achieving the effect.BFT can provide product development solutions and rapid prototyping according to customer needs and can provide multiple services such as turning, milling, and surface grinding.BFT  will serve customers in every process of realizing customer ideas.
Die casting Mold
2023-05-25
0
Die casting die is a tool for casting metal parts, a tool for completing the die casting process on a special die casting die forging machine. The basic process of die casting is that the liquid metal is first cast at low or high speed and filled into the cavity of the die. The die has an active cavity surface, which is forged under pressure along with the cooling process of the liquid metal, not only to eliminate the shrinkage cavity and porosity defects of the blank, but also to make the internal structure of the blank reach the forged broken grain. The comprehensive mechanical properties of the blank are remarkably improved.Chinese nameDie casting mouldForeign namesDie casting mouldThis massA method of liquid die forgingThe technological processThe liquid metal is first cast at low or high speedThree main factorsDie casting material, die casting machine,Die casting material, die casting machine and die are the three main elements of die casting production. The so-called die casting process is to use these three elements organically and comprehensively, so that it can produce qualified castings with good appearance, internal quality, size conforming to the requirements of the drawing or the agreement steadily and efficiently, or even high quality castings.The alloy used in die casting is mainly non-ferrous alloy, as for the ferrous metal (steel, iron, etc.) due to the problems of mold materials, less use. In the non-ferrous alloy die casting, aluminum alloy is widely used, followed by zinc alloy. Here is a brief introduction to die – casting nonferrous metals.(1) the classification of die casting non-ferrous alloy is blocked mixed contraction free shrinkage lead alloy – 0.2-0.3-0.4-0.4% and 0.5% 0.3% low melting point alloy tin alloy zinc alloy — — — — — — — – 0.3-0.6-0.4-0.6% 0.4% and 0.8% Al-si series 0.7 0.5-0.3-0.5% – 0.7% – 0.9% of die casting non-ferrous alloy aluminum alloy aluminum bronze series aluminum magnesium – 0.5-0.7-0.9-0.9% and 1.1% 0.7% high melting point alloy aluminum zinc series magnesium alloys — — — — — — — — — – 0.5-0.7-0.9% 0.7% 0.9 1.1% of copper alloy(2) The recommended casting temperature for all kinds of die casting alloys: the average wall thickness of castings of alloy types is less than or equal to 3mm, the average wall thickness of castings > 3mm simple structure complex structure simple structure complex structureAluminum alloy aluminum silicon series 610-650℃ 640-680℃ 600-620℃ 610-650℃Aluminum copper system 630-660℃ 660-700℃ 600-640℃ 630-660℃Aluminum magnesium series 640-680℃ 660-700℃ 640-670℃ 650-690℃Aluminum and zinc series 590-620℃ 620-660℃ 580-620℃ 600-650℃Zinc alloy 420-440℃ 430-450℃ 400-420℃ 420-440℃Magnesium alloy 640-680℃ 660-700℃ 640-670℃ 650-690℃Copper alloy common brass 910-930℃ 940-980℃ 900-930℃ 900-950℃Silicon brass 900-920℃ 930-970℃ 910-940℃ 910-940℃* Note: ① The casting temperature is generally measured by the temperature of the liquid metal in the holding furnace.(2) The casting temperature of zinc alloy should not exceed 450℃ to avoid coarse grains.The design processEdit the voice1, according to the type of materials used in the product, product shape and precision and other indicators of the product process analysis, determine the process.2. Determine the placement of products in the mold cavity, analyze and design the parting surface, drainage system and pouring system.3. Design the assembling and fixing modes of the core of each activity.4. Design of core-pulling distance and force.5. Design of ejection mechanism.6. Determine the die casting machine, and design the die frame and cooling system.7. Check the relative dimensions of molds and die casting machines, and draw the process drawings of molds and various parts.8. Design completion [1].Frequently Asked QuestionsThe control of the surface temperature of die casting die is very important for the production of high quality die castings. Uneven or inappropriate die casting temperature can also lead to unstable casting size and deformation of the casting during the production process, resulting in defects such as thermal pressure, sticking mold, surface sag, internal shrinkage cavity and hot bubble. When the mold temperature is different, the variables in the production cycle, such as filling time, cooling time and spraying time, will be affected to different degrees.1). Cold lines:Reason: the temperature of the front end of melting soup is too low, and there are traces of overlappingImprovement methods:1. Check if the wall thickness is too thin (design or manufacture), thinner areas should be filled directly2. Check that the shape is not easy to fill; Too far away, closed areas (e.g., fin, bulge), blocked areas, too small fillet, etc., are not easy to fill. And watch for ribs or cold spots3. Shorten the filling time, shorten the filling time method4. Change filling mode5. Methods of increasing mold temperature6. Raise the temperature of the soup7. Check alloy composition8. Expanding the escape route may help9. A vacuuming device may be useful2). Crack:The reason:1. Shrinkage stress2. Cracked under pressure on ejection or entire edgeImprovement methods:1. More rounded corners2. Check whether there is a hot spot3. Pressurization time change (cold chamber machine)4. Increase or shorten mold closing time5. Increase the drawing Angle6. Add the ejection pin7. Check whether the mold is misplaced or deformed8. Check alloy composition(3). Porosity:The reason:1. Air is mixed in the soup2. Gas source: melting, in the pipe, in the mold, release agentImprovement methods:1. Slow down2. Check if the runner turns smoothly and the cross-sectional area is decreasing3. Check to see if the area of the escape duct is large enough, if it is obstructed, and if it is located at the last filling place4. Check whether the release agent is sprayed too much and the mold temperature is too low5. Use the vacuum4). Cavitation erosion:Cause: Due to the sudden decrease of pressure, the gas in the melting soup suddenly expanded, impacting the mold and causing mold damageImprovement methods:The cross-sectional area of the flow channel should not change sharply5). Shrinkage cavity:Reason: When a metal solidifies from a liquid state to a solid state, the space occupied by the metal becomes smaller. If there is no metal supplement, shrinkage cavity will form, usually at a slower solidification placeImprovement methods:1. Increase the pressure2. Change the mold temperature. Local cooling, spray type agent, reduce mold temperature. Sometimes just change the location of the shrinkage hole, rather than the shrinkage hole6). Peeling:The reason:1. Poor filling mode, resulting in melting soup overlap2. Mold deformation, resulting in melting soup overlap3. Inclusion oxide layerImprovement methods:1. Switch to high speed early2. Shorten filling time3. Change filling mode, gate position, gate speed4. Check mold strength is sufficient5. Check whether the pin and die devices are in good condition(6. Check for inclusion of oxide layer7). Bellows:Reason: The first layer of melting soup cools rapidly on the surface, while the second layer of melting soup flows through and fails to melt the first layer, but it has enough fusion to cause different tissuesImprovement methods:1. Improved filling mode2. Shorten filling time8). Holes caused by poor flow:Cause: The soup flows too slowly, or is too cold, or the filling pattern is poor, so there are holes in the solidified metal jointsImprovement methods:1. The same method of improving cold stripe2. Check whether the temperature of the melting soup is stable3. Check whether the temperature charge of the mold is stable9). Hole in parting surface:Cause: It could be shrinkage or blowholeImprovement methods:1. In case of shrinkage, reduce the thickness of gate or overflow inlet2. Cooling gate3. If there are air holes, pay attention to exhaust or air trapping10). Flash:The reason:1. Clamping force is insufficient2. Bad mold closing3. Insufficient die strength4. The soup is too hot11). Shrinkage in:Cause: Shrinkage occurs below the pressure surfaceImprovement methods:1. Methods to improve shrinkage cavity2. Local cooling3. Heat the other side12). Carbon deposition:Cause: release agent or other impurities accumulated on the mold.Improvement methods:1. Reduce the amount of release agent spray2. Higher mold temperatures3. Select suitable release agent4. Use soft water to dilute the release agent13). Bubble:
Test and Measurement Component Class Recommendation
2023-05-18
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on the topic of test and measurement component class recommendation. The article should cover the following points:1. Introduction to test and measurement components 2. Importance of component class recommendation 3. Factors to consider when recommending component class 4. Types of test and measurement components and their recommended classes 5. ConclusionIntroduction to Test and Measurement ComponentsTest and measurement components are electronic devices used to measure and test the performance of electronic systems. These components are essential in the design, development, and maintenance of electronic systems. They are used to measure various parameters such as voltage, current, resistance, capacitance, and frequency. Test and measurement components are used in various industries such as telecommunications, aerospace, defense, automotive, and medical.Importance of Component Class RecommendationThe performance of test and measurement components is critical in ensuring the accuracy and reliability of electronic systems. The component class recommendation is essential in selecting the appropriate component for a specific application. The component class recommendation provides information on the performance, accuracy, and reliability of the component. It also ensures that the component meets the required standards and specifications.Factors to Consider When Recommending Component ClassSeveral factors need to be considered when recommending the component class for a specific application. These factors include:1. Accuracy: The accuracy of the component is critical in ensuring the reliability of the electronic system. The component class recommendation should ensure that the component meets the required accuracy standards.2. Frequency range: The frequency range of the component is essential in selecting the appropriate component for a specific application. The component class recommendation should ensure that the component meets the required frequency range.3. Temperature range: The temperature range of the component is critical in ensuring the reliability of the electronic system. The component class recommendation should ensure that the component meets the required temperature range.4. Signal level: The signal level of the component is essential in selecting the appropriate component for a specific application. The component class recommendation should ensure that the component meets the required signal level.5. Environmental conditions: The environmental conditions of the application are critical in selecting the appropriate component. The component class recommendation should ensure that the component meets the required environmental conditions.Types of Test and Measurement Components and Their Recommended ClassesThere are various types of test and measurement components, and each type has its recommended class. The following are the types of test and measurement components and their recommended classes:1. Multimeters: Multimeters are used to measure voltage, current, and resistance. The recommended class for multimeters is Class I.2. Oscilloscopes: Oscilloscopes are used to measure voltage and frequency. The recommended class for oscilloscopes is Class II.3. Signal generators: Signal generators are used to generate signals of different frequencies and amplitudes. The recommended class for signal generators is Class III.4. Power supplies: Power supplies are used to provide power to electronic systems. The recommended class for power supplies is Class IV.5. Spectrum analyzers: Spectrum analyzers are used to measure the frequency spectrum of a signal. The recommended class for spectrum analyzers is Class II.6. Network analyzers: Network analyzers are used to measure the performance of electronic networks. The recommended class for network analyzers is Class II.ConclusionTest and measurement components are essential in the design, development, and maintenance of electronic systems. The component class recommendation is critical in selecting the appropriate component for a specific application. The component class recommendation ensures that the component meets the required standards and specifications. Several factors need to be considered when recommending the component class, such as accuracy, frequency range, temperature range, signal level, and environmental conditions. The recommended class for each type of test and measurement component ensures the accuracy and reliability of the electronic system.
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