As a result of the investigation, this was found out to be the case.The final step is to modify the EDM process in such a way as to reduce the thickness of the white bright layer, electropolish the surface of the inner cavity in such a way as to improve the surface finish of the inner cavity, and add anti-corrosion inhibitors and scale inhibitors to the cooling water in such a way as to reduce the China die casting mold effect of the cooling water's corrosion on the core-pulling inner cavity. This will result in the mold core pulling life being extended as a direct result of the modification.Now that we've had a chance to examine the breaks, let's take a closer look at them to see if there are any feasible and doable ways to cut down on the total number of breaks.1) An examination of the larger picture of the structure of the macro-fractures
The core-pulling structure has an elliptical cross-section with a major axis that is approximately 80 mm and a minor axis that is approximately 50 mm, and the fracture is situated approximately close to the mid-horizontal line.The core-pulling structure has a major axis that is approximately 80 mm in diameter, and the minor axis is approximately 50 mm in diameter.It is clear that the interior cavity of the device houses some kind of water-based cooling system in some capacity.The entire section can be dissected into three distinct parts, which are referred to as the initial fracture zone, the crack propagation zone, and the final fracture zone respectively.The subsequent process of repeated core pulling causes the crack to spread further and further until it finally breaks. This occurs as a direct result of the process.As can be seen from the fact that this is the case, it is abundantly clear that the chemical composition of the core satisfies the requirements specified by the standard for H13 steel. This can be seen as evidence that this is the case..
3) An investigation that is carried out by means of the use of a microscopeAfter treatments such as grinding, polishing, and corrosion have been applied to the samples, they should be inspected. It is necessary to obtain samples from the broken section of the workpiece by cutting them in both the longitudinal and transverse directions. Because the metallographic structure is typical, there is no longer any chance that an abnormality in the structure was the primary factor that led to the core-pulling fracture.
After cutting along the crack source in a longitudinal direction and observing the metallographic structure near the inner cavity wall, it was discovered that the inner cavity wall is extremely rough and that it contains a significant number of cracks that run transversely. This was discovered after cutting along the crack source in a longitudinal direction. After longitudinally cutting along the crack aluminum die casting source, this was discovered as a result. We were able to learn that the core-pulling inner cavity had been machined using EDM prior to being put into production without having been subjected to any other kind of treatment after having conversations with members of the production staff. Because we had the ability to acquire this knowledge on our own, this information was made available to us. The depth of the white bright layer that is produced by EDM can reach up to 50 micrometers, and the white bright layer develops microcracks as soon as EDM is performed on it. This happens immediately. Because the inner cavity of the core puller is machined with electric discharge, it is inevitable that a more substantial white layer and an increased number of microcracks will be produced. This is due to the fact that the method of electric discharge machining is used. During the process of solidification, the surface of the mold that is responsible for pulling the core is constructed in such a way that it is able to take in the heat that is radiated off of the aluminum alloy melt. On the other hand, the inner layer incorporates water, which performs the function of a cooling agent. As a consequence of this, the temperature of the inner cavity is significantly reduced. As a direct result of this, in the environment of varying cold and heat close to the core-pulling inner cavity, micro-cracks are certain to widen, which will eventually result in a gradual decline in the overall quality of the mold.
As a result of the investigation, this was found out to be the case.The final step is to modify the EDM process in such a way as to reduce the thickness of the white bright layer, electropolish the surface of the inner cavity in such a way as to improve the surface finish of the inner cavity, and add anti-corrosion inhibitors and scale inhibitors to the cooling water in such a way as to reduce the effect of the cooling water's corrosion on the core-pulling inner cavity. This will result in the mold core pulling life being extended as a direct result of the modification.Now that we've had a chance to examine the breaks, let's take a closer look at them to see if there are any feasible and doable ways to cut down on the total number of breaks.1) An examination of the larger picture of the structure of the macro-fractures
The core-pulling structure has an elliptical cross-section with a major axis that is approximately 80 mm and a minor axis that is approximately 50 mm, and the fracture is situated approximately close to the mid-horizontal line.The core-pulling structure has a major axis that is approximately 80 mm in diameter, and the minor axis is approximately 50 mm in diameter.It is clear that the interior cavity of the device houses some kind of water-based cooling system in some capacity.The entire section can be dissected into three distinct parts, which are referred to as the initial fracture zone, the crack propagation zone, and the final fracture zone respectively.The subsequent process of repeated core pulling causes the crack to spread further and further until it finally breaks. This occurs as a direct result of the process.As can be seen from the fact that this is the case, it is abundantly clear that the chemical composition of the core satisfies the requirements specified by the standard for H13 steel. This can be seen as evidence that this is the case.
3) An investigation that is carried out by means of the use of a microscopeAfter treatments such as grinding, polishing, and corrosion have been applied to the samples, they should be inspected. It is necessary to obtain samples from the broken section of die casting mould the workpiece by cutting them in both the longitudinal and transverse directions. Because the metallographic structure is typical, there is no longer any chance that an abnormality in the structure was the primary factor that led to the core-pulling fracture.
After cutting along the crack source in a longitudinal direction and observing the metallographic structure near the inner cavity wall, it was discovered that the inner cavity wall is extremely rough and that it contains a significant number of cracks that run transversely. This was discovered after cutting along the crack source in a longitudinal direction. After longitudinally cutting along the crack source, this was discovered as a result. We were able to learn that the core-pulling inner cavity had been machined using EDM prior to being put into production without having been subjected to any other kind of treatment after having conversations with members of the production staff. Because we had the ability to acquire this knowledge on our own, this information was made available to us. The depth of the white bright layer that is produced by EDM can reach up to 50 micrometers, and the white bright layer develops microcracks as soon as EDM is performed on it. This happens immediately. Because the inner cavity of the core puller is machined with electric discharge, it is inevitable that a more substantial white layer and an increased number of microcracks will be produced. This is due to the fact that die casting mold the method of electric discharge machining is used. During the process of solidification, the surface of the mold that is responsible for pulling the core is constructed in such a way that it is able to take in the heat that is radiated off of the aluminum alloy melt. On the other hand, the inner layer incorporates water, which performs the function of a cooling agent. As a consequence of this, the temperature of the inner cavity is significantly reduced. As a direct result of this, in the environment of varying cold and heat close to the core-pulling inner cavity, micro-cracks are certain to widen, which will eventually result in a gradual decline in the overall quality of the mold.
An exact quantity of corrosion inhibitor and scale inhibitor is blended into the cooling water in order to mitigate the corrosive effects of the cooling water on the inner wall of the core-pulling cavity. This is done in order to prevent the formation of scale. Because the protection that is provided by the measures that were described above, the core-pulling production of more than 80,000 molds is still going well, and none of the molds have a tendency to break. This is due to the fact that none of the molds have a tendency to break. If the core-pulling cavity, which is part of the cooling water circuit, is subjected to ordinary tap water as its environment, it will corrode and eventually break apart. This cavity is a component of die cast parts the water-circulating system that cools the system. When a particular quantity of corrosion inhibitor and scale inhibitor is added to a particular quantity of cooling water, the likelihood of corrosion occurring is effectively decreased, and the lifespan of the mold is extended. Both of these benefits come about simultaneously.
When you take into account the fact that the core-pulling cavity is submerged in cooling water for an extended period of time and that the quality of the water is comparable to that of regular tap water, corrosion is very likely to occur in an environment such as this one. In addition, the water quality is comparable to that of regular tap water. When the water temperature in the cooling water circuit of core pulling reaches above 60 degrees Celsius, there is a greater likelihood that calcium and magnesium ions will decompose and form scale, calcium carbonate, and other types of scale. This is because there is a higher temperature at which calcium and magnesium ions are more likely to react with one another. When they reach their destination, these particles encourage the growth of microorganisms zinc alloy die casting and hasten the corrosion that occurs when mold cores are pulled from molds. As a consequence of this, as a consequence of the combined effect of the microcracks caused by EDM and the corrosion of the mold caused by the cooling water, the transverse cracks continue to expand and eventually break during the process of repeatedly extracting the core by pulling it up and down. This occurs as a consequence of the combined effect of the microcracks caused by EDM and the corrosion of the mold caused by the cooling water.
The combined effect of the microcracks caused by EDM and the corrosion of the mold caused by the cooling water has led to this result. This led to the formation of a layer of white that was extremely dense and opaque as a result of what happened. One must, of course, also take into account the effectiveness with which the production was carried out. This is something that goes without saying. Electropolishing is done with the intention of bringing about as much of a smoother state across this surface as is possible due to the unevenness that is present. On the opposite side of the anode, which is the polished core-pulling inner cavity, you'll find the cathode, which stands for the insoluble metal. The anode is the part of the core that is being pulled out. Because of this, the surface roughness value of the cavity is reduced, and it is possible to produce a surface that is completely smooth.
