Some molds need various small holes, some need to aluminum casting factory be cut, and some need to process various special-shaped holes. The various apertures on the mold are completed by laser drilling, which can drill precisely and has a large hole diameter. Some molds need to be cut, while others need to process various special-shaped holes. Very even. In the realm of non-contact processing, laser drilling of precision molds is included. Utilizing a high-density laser light source to irradiate the material to be processed in order to vaporize the material and form holes is the process that is referred to as laser drilling. Because the laser beam is highly concentrated in space and time, the diameter of the spot can be reduced to the level of microns by using lens focusing to obtain a laser power density of 105-1015 W/cm2. This is possible because the laser beam is highly concentrated in both space and time.
Because it is capable of resolving a wide variety of issues that are inherent in conventional mechanical processing, the laser drilling machine has become increasingly widespread in its application. For instance, the surface of the mold that was processed by conventional stamping and drilling will not be smooth, and the mold will also show signs of having been squeezed at some point. There will be deformation if the stamping is not done properly, but with laser drilling, the laser beam is used to irradiate the surface of the mold, and the high-energy laser beam dissipates instantly without touching the workpiece, preventing any damage to the workpiece. In most cases, the hole diameter China die casting mold of the mold is somewhere between 0. 3mm and 0. 5mm. The traditional hole processing equipment does not have an accurate hole size, and the resulting holes are both of a different size and shape. The laser hole machine, on the other hand, can achieve a precision of 0. 001 millimeters, and its processing speed for holes is very high. Because the laser beam drilling of the punching machine can instantly penetrate a hole in just one second, the mold laser drilling machine is used extensively in the processing of industrial goods.
Preventative measures to be taken against the heat-treating-induced deformation of precision molds
Preventative measures to be taken against the heat-treating-induced deformation of precision molds.
During the heat treatment process, precision molds frequently lose their shape. To put a stop to this unfortunate occurrence, all we need to do is understand the law of aluminum die castings deformation, investigate the factors that contribute to it, and implement a variety of techniques that prevent mold from deforming. It is possible to bring it under control and bring it down. To prevent reasonable material selection for heat treatment deformation of precision and complex molds, the following methods can be used in general. It is important to choose micro-deformation mold steel made of high-quality material for molds that require both precision and complexity. In the case of mold steel that exhibits severe carbide segregation, it is recommended that a heat treatment consisting of casting, quenching, and tempering be carried out. For larger and uncastable mold steels, it is possible to perform a heat treatment known as solid solution double refinement.
The design of the mold structure ought to be reasonable, and the thickness shouldn't vary an excessive amount from place to place. It is important that the shape be symmetrical. It is important to have a solid understanding of the deformation law for molds that exhibit significant deformation. A combined structure is an option for die casting products molds that are large, complex, and technologically advanced. Molds that are precise and complex should be pre-heated to get rid of any residual stress that was caused by the machining process. Choose the appropriate temperature for heating, and exercise control over the rate of heating. It is possible to cut down on the heat treatment-induced deformation of the mold by using techniques such as slow heating, preheating, and other balanced heating methods with precision and complex molds.
If you want to guarantee that the mold will be hard, you should try to use a process called pre-cooling, graded cooling quenching, or warm quenching as much as possible. If the premise allows it, try using vacuum heating quenching for precision and complex molds, and then follow that up with cryogenic treatment after the quenching process. The precision of the mold can be controlled with the help of pre-heat treatment, aging heat treatment, quenching and tempering nitriding heat treatment, and aging heat treatment. These treatments can be used for molds that are both complex and precise. Cold welding machines and other repairing equipment with little thermal influence are used when repairing defects such as mold sand holes, pores, and wear. This is done to avoid the material deforming during the process of repair, which can be caused by thermal stress. The heat treatment process operation can be carried out in a variety of different ways, including but not limited to plugging holes, binding holes, employing mechanical fixation, utilizing appropriate heating methods, making an accurate selection of the cooling direction of the mold and the direction of movement in the cooling medium, etc. The tempering and heat treatment process can also reduce complexity and precision to a reasonable degree. Measures that are effective for preventing mold deformation.
Some mold materials and steel materials are very good; however, the unreasonable mold structure design, such as thin edges, sharp corners, grooves, sudden steps, thickness disparity, etc. , often results in large deformation of the mold after heat treatment. This can be avoided by using mold materials and steel materials that are of higher quality. As a result of the uneven thickness of the mold or the presence of sharply rounded corners, the thermal stress and tissue stress of each part of the mold are different during quenching. This difference in stress leads to a difference in volume expansion of each part, which in turn causes the mold to deform after quenching. When designing the mold, under the condition of meeting the actual production needs, the disparity in thickness and asymmetric structure of the mold should be minimized, and a structural design such as smooth transition should be adopted as much as possible at the junction of thickness and thickness of the mold. This is to ensure that the mold is as efficient as possible in meeting the actual production needs. The machining allowance is set aside in accordance with the deformation law of the mold. This ensures that the mold will not be thrown away as a result of the deformation of the mold caused by quenching. It is possible to use a combined structure to achieve uniform cooling throughout the quenching process for molds that have particularly complex shapes.
After being subjected to heat treatment, it is frequently discovered in the factory that certain molds with intricate designs and stringent requirements for precision have significant degrees of deformation. After conducting in-depth research, it was discovered that the molds did not go through any pre-heat treatment prior to the machining stage or any post-heat treatment after they were finished. The mold undergoes a greater amount of deformation as a result of the heat treatment because the residual stress from the machining process and the stress after quenching are superimposed on one another. A stress-relief annealing should be performed after rough machining and before semi-finishing. This will allow the quenching temperature to be lowered, which will in turn reduce the amount of residual stress that is present after quenching. It is recommended to use oil quenching at 170 degrees Celsius for air cooling, and the isothermal quenching process should be used in order to lower the quenching residual stress. The above actions have the potential to stop the mold from spreading. The amount of mold deformation that occurs after the reduction of the mold's residual stress is also less.
