Mxtcasting

        How to deal with the problem of precision casting deformation In the process of manufacturing precision castings , due to some hardware facilities, management, casting cooling and correction problems, the deformation of the castings will occur. How do we deal with the deformation of the castings? Casting deformation is divided into: micro self-deformation, flaring deformation of the casting and warping deformation. Trace self-deformation: Among alloy materials, gray cast iron is most prone to micro-deformation. After the falling of the gray cast iron, the residual stress is mainly the residual thermal stress. In addition to the defects such as cold cracking of the casting and deformation of the casting, the residual stress is also the main reason for the occurrence of trace self-deformation. Even if the residual stress does not exceed the yield strength of the material, under the action of the gray cast iron, the micro-plastic deformation will occur slo

                                                                        The future of aluminum casting Aluminum alloy die-casting aluminum parts are widely used, especially in the automotive industry. The demand for aluminum alloy die-cast aluminum parts is very large, and the development of aluminum alloy die-cast aluminum parts in China. In recent years, the production capacity of aluminum alloy die-cast aluminum parts in China has been expanding, and the market for aluminum alloy die-cast aluminum parts has become more and more prosperous. The future of aluminum alloy die-casting aluminum parts Since 2012, multinational auto giants have set off a round of engine investment in China, which is gaining momentum. Under the gradual pursuit of lightweight in the automotive industry, aluminum alloy die-casting aluminum parts are the largest. The advantage is won, the global aluminum alloy die-cast aluminum parts have a huge demand, which has ef

                                                                          Precision cast ing  material The metal materials of precision casting enterprises mainly come from purchased materials, waste castings and pouring risers of the company. The purchased metal materials are often in bulk, and they are rarely pressed into a cylindrical shape. Materials of different materials are easily confused. For example, 316 materials are mixed with 304 or 430 materials. Therefore, precision casting companies should choose to purchase materials that are pressed into a cylindrical shape. The chemical composition of each batch of purchased materials was analyzed using a spectrum analyzer. If possible, the supplier should conduct a site visit to evaluate whether the materials are labeled, protected, and isolated. For the scrap steel (waste castings, pouring risers) of the enterprise, it is necessary to remove rust, remove oil, clean sand and clean and dry, and control the S and P

                                                                                                                    Common problems in   aluminum casting Common problems in aluminum casting are: pores, cracks, shrinkage cavities, shrinkage, and cold separation. Porosity: The porosity defects of cast aluminum parts can be divided into five types: intrusion pores, wrapped pores, precipitated pores, endogenous reaction pores, and exogenous reaction pores. The longest seen in aluminum castings are the first three types of porosity defects. crack: There are two main reasons for the cracking of aluminum casting parts: the solidification mode of aluminum castings and the casting stress during solidification. Aluminum castings have a wide range of solidification temperatures. Shrinkage and shrinkage are manifested by the rough surface of the hole wall and the irregular shape, which usually occurs at the final solidification of the casting and at the hot section. The

Aluminum casting manufacturers win advantages in the automotive industry due to their low melting point, easy casting and high precision. Now all kinds of metal casting processes are very advanced. Why do aluminum casting manufacturers win the dominant position in the automotive industry? This should be said from the characteristics of aluminum castings. Aluminum castings have low melting point, easy casting, excellent precision and appearance, and stable performance, so they are unanimously recognized by many automobile manufacturers. Aluminum casting manufacturers have a very important role in the current industry. Let's talk about why aluminum casting manufacturers will be widely used. Aluminum casting manufacturer 's function The process of using aluminum castings in production is facing the unparalleled advantages of many other castings. Its advantages are in the lightweight automotive industry. Aluminum casting has a wide range of applications in the automoti

                                                                Talking about the Four Reasons for the Blackening of Valve Castings In the field of machining, due to the particularity of valve castings , there will be blackening during use. Why? What are the reasons for this? 1. Internal reasons. Many valve casting manufacturers will not do any cleaning work after die casting and machining, and some even just use water flushing, which is difficult to clean thoroughly. Corrosive substances such as release agents, cutting fluids, saponification liquids and other stains remaining on the surface of the die casting will accelerate the blackening of the mold. 2. The impact of the external environment. Under certain conditions of temperature and humidity, the castings are prone to oxidative blackening or mildew, which is actually determined by the characteristics of the casting itself. 3. The process design is unreasonable. Improper handling of valve castings after cleaning or

                                                                      Method for preventing cracking of castings In the production process of castings , cracks are easily generated near the gate or outer edge of the casting, which leads to an increase in the scrap rate of the casting, which seriously affects the quality of the casting and the economic benefits of the enterprise. So how do you prevent cracks in stainless steel castings? 1. Use of cold iron. Place cold iron at a local small hot section where cracks are easy to occur (such as the habit of the body and the flange), accelerate the solidification speed at this point, weaken the sequential solidification strength, and achieve a small range of simultaneous solidification, which is beneficial to reduce thermal cracking and shrinkage. Loose defects. It is worth noting that cold iron has the effect of refining grains and improving the local high temperature strength of castings. It is used in the casting production o

                                   Factors affecting the quality of casting sand Production conditions and existing problems The improvement of the quality requirements of stainless steel castings has promoted the development of new casting modeling methods and equipment. The new modeling methods and equipment put forward higher requirements for sand performance, and sand can solve the problem of gas defects in casting production. At present, some stainless steel castings produced by some foundries in China have poor surface quality and high scrap rate. One of the main reasons is that the quality of the used sand raw materials is not good. So what are the factors that affect the quality of casting sand? 1. Bentonite. Bentonite acts as a binder in the molding sand, and its wet-state cohesive force, hot-wet cohesive force and reusability are the main indicators reflecting the quality of bentonite. If the quality of the bentonite used is poor, in order to ensure the stren

                                                                    Advantages of Investment Casting INVESTMENT CASTING VS. SAND CASTING Sand castings are made by creating a negative in a bed of sand to create the cavity for casting. A sand shell creates a rough exterior to castings. Typical surface finish of sand castings are 250 Ra as cast, and need extensive work afterwards to create a surface finish that is acceptable in most applications. Sand castings can also not hold as tight of tolerances as Investment Castings, and will likely need more machining than an Investment Casting. Investment casting uses a ceramic mold that can produce a much smoother finish, typically averaging 125 Ra surface finish as cast. Investment castings also greatly reduce the amount of machining that will be required after casting by holding a .005”/inch tolerance for the majority of applications. INVESTMENT CASTING VS. DIE CASTING Die casting is the process in which molten metal i

                                         Advantages of Investment Casting Why should you choose investment casting ? 1. SMOOTH FINISH  Investment casting uses a ceramic mold that can produce a much smoother finish, typically averaging 125 RA surface finish as cast. 2. FASTER PRODUCTION Investment castings cut down on labor time and produce quicker lead times because it greatly reduces the amount of machining required after casting. 3. TIGHT TOLERANCES Investment castings hold tighter tolerances, which reduces the amount of machining required. The standard tolerance is  +/-.005 per inch. 4. AFFORDABLE TOOLING Investment casting requires less expensive equipment and is inherently less dangerous, which allows for costs to remain low. 5. VAST SIZE RANGE  Investment casting allows for both large and small casts. Intricate, miniature parts that are 1/10 of an ounce or less can be cast, and also large parts up to 50 pounds can be cast. 6. MATERIAL VARIETY

                                  What are the specific requirements for precision machining parts processing? As we all know, for precision  machining  parts , processing is very strict. The processing steps include a series of steps such as feeding and cutting. The size and precision are also required. For example, how many micrometers are 1mm positive and negative, etc. If the size is too small, it will become a waste product, which is equivalent to reprocessing. It takes time and effort, and sometimes even scraps the entire processing material, which causes an increase in cost. At the same time, parts are definitely not used. What are the specific requirements for precision  machining  parts processing? 1. In order to ensure the precision of precision parts processing, the processing of rough and fine mechanical parts is best carried out separately. Because the cutting amount is large when the rough mechanical parts are processed, the cutting force and clamping f

                                      What are the specific characteristics of precision machining parts processing? Precision machining parts processing has many advantages. The most obvious is that it can achieve high precision that cannot be achieved by different processing. High precision also depends on precise processing equipment and accurate restraint system, and precision mask is used as an intermediary to realize The fine control of the amount of surface material removed or added, so what are the characteristics of precision parts processing? Let's give a brief introduction to the following: 1. Precision machining parts processing When the precision of machining precision parts is nanometer, and even the last atomic unit (atomic lattice distance is 0.1-0.2 nm), the machining method of ultra-precision parts can not be adapted. It is necessary to use the method of special precision parts processing, that is, the application of chemical energy. Electrochemical en

                            A brief description of the polishing method of aluminum die casting The surface technology of aluminum die   casting parts is rich and varied, and polishing treatment is only one of them, but it is an important process to improve the quality of aluminum die   casting parts. Mastering the reasonable polishing method can improve the quality and performance of aluminum  die   casting parts, and thus improve the quality of aluminum alloy die   casting products. Regarding the polishing of the workpiece, in addition to the conventional mechanical polishing and chemical polishing, there are technologies such as electrolytic polishing, ultrasonic polishing, fluid polishing, magnetic polishing, and medium electric spark ultrasonic composite polishing. The basic principle of electrolytic polishing of aluminum alloy die-casting parts is the same as that of chemical polishing, mainly relying on selectively dissolving tiny protruding portions on the surface of

                                                                 What are the requirements or precautions for the casting of precision castings during casting? To make it easy to make models, core boxes and shapes: 1) The shape of Suzhou precision castings should be simple, so as to facilitate the moulding, the casting parting surface should be as flat as possible and the number is the smallest; 2) The internal cavity stress of precision castings is not required or less used in casting. When using the core, it should be convenient to support, fix and exhaust sand. If necessary, there should be enough process holes; 3) For the inner and outer sides of the precision castings and the ribs and other structures, a certain structural inclination should be provided in the direction of the die-cutting; 4) The boss part on the precision casting should not be too different from the precision casting body. It is best to take the same height. The several

                                                                                                          6 major inspection methods for automotive stamping parts 1. Touch test Wipe the surface of the outer cover with clean gauze. The inspector is required to wear a touch glove to touch the stamped surface along the longitudinal direction of the stamping. This method of inspection depends on the inspector's experience. When necessary, oil stone can be used to polish and detect the suspected area, but this method is an effective and quick method. 2 . oil test Wipe the surface of the outer cover with clean gauze. Then use a clean brush to evenly apply oil to the entire outer surface of the stamping in the same direction. The oil-coated stampings are placed under strong light and it is recommended that the stamped parts be placed in the body position. With this method, it is easy to find tiny pittings, ponds, and corrugations on the stampings. 3 . sanding of flexible

                                                        What are the types of machining for precision machining ? 1. High-speed, precision CNC lathes, turning centers and multi-axis combined machining machines. Mainly meet the needs of aerospace, aviation, instrumentation, instrumentation, electronic information and bioengineering industries. Second, high-speed, high-precision CNC milling and boring machine and high-speed, high-precision vertical horizontal machining center. It mainly meets the needs of large-scale complex structural brackets, shells, cabinets, light metal materials and precision parts for automobile engine cylinder heads and aerospace, high-tech and other industries. Third, heavy-duty, super-heavy CNC machine tools: CNC floor milling and boring machine, heavy-duty CNC gantry boring and milling machine and gantry machining center, heavy-duty CNC horizontal lathe and vertical lathe, CNC heavy-duty hobbing machine, etc., such products meet energy, aero