Some carbide workpieces can be precision ground on the CNC precision grinding machine; however, due to the small size of the fine grinding grains, the grinding machine needs to have a micron-level lateral feed system in order to achieve the required grinding depth. During the process of grinding superhard grinding wheels, there are CNC manufacturing several requirements that must be met by the grinding machine.
1. The grinding machine is required to have a high level of precision. The radial runout of the grinding wheel spindle's rotation accuracy should be less than 0. 001mm, and the axial runout should be less than 0. 005mm. Both of these runouts should be less than 0. 001mm. Either a bearing that operates under dynamic pressure or one that operates under a combination of dynamic pressure and static pressure is required for the main shaft bearing. In order to achieve the level of machining accuracy necessary for precision grinding, hydrostatic bearings are another tool that can be utilized.
2. The grinding machine should have adequate rigidity, a high level of stability, and a low level of vibration. The rigidity of the machine tool has an impact on the quality and vibration resistance of the grinding wheel, which in turn has an impact on the longevity and life of the superhard grinding wheel as well as the quality of the grinding process. In general, it is recommended that standard grinding machines have their rigidity increased by approximately fifty percent.
3. It features high precision, uniform and stable speed, a wide speed range, fast feed speed to ensure the requirements for productivity, and low speed to ensure the requirements for grinding size, shape accuracy, and surface roughness. I am in need of a system. In most cases, the minimum longitudinal feed should not be any higher than 0. 1 meters per minute, and the minimum lateral feed (grinding depth) should be 0. 001 to 0. 0005 millimeters per eighth of a turn (single stroke). When grinding micropowder with a wheel, it is important to adjust the horizontal feed rate of the grinder based on the size of the particles being ground.
4. You should think about dressing the extremely abrasive wheels. To dress superhard grinding wheels, one needs specialized machinery, hydraulic fluids, dressing CNC Machining ABS parameters, and so on, which may necessitate modifications to the machine tool. To stop the cemented carbide grains from getting inside the machine tool and wearing it out, every moving part, including the part of the spindle that rotates and the part of the feed movement that guides the movement, among other parts, should have a good, tight seal.
5. It is necessary to have a comprehensive grinding fluid treatment system in order to guarantee that the grinding fluid is clean and able to perform its intended function. This is done to avoid having the surface roughness of the machined surface be affected. Protects the machine tool's moving components from the abrasive grinding operations that could otherwise cause wear and tear. When grinding superhard grinding wheels, you need only a minimal amount of vibration. The machine tool needs to be positioned atop the anti-vibration base, and subsequent anti-vibration and anti-vibration precautions need to be taken. For instance, the grinding wheel should have its edges trimmed and its balance adjusted, and anti-vibration pads should be installed at the interface between the machine and the ground.
How to process stainless steel 304 and 316, as well as a comparison of the two materials' respective processing technologies.
Because of its excellent resistance to corrosion, stainless steel is used extensively. There are numerous grades of stainless steel, each of which varies in CNC machining services terms of its ability to be formed, its strength, and its machinability. Among them, stainless steel type 304 and stainless steel type 316 are two of the most widely utilized types of stainless steel. At the moment, in order to achieve superior slicing results when working with stainless steel types 304 and 316, the metal will first be normalized, and then coolant will be utilized during the processing stage.
The stainless steel grade 304, also known as A2 stainless steel, has chromium percentages ranging from 18% to 20% and nickel percentages ranging from 8% to 10%. About 16% chromium, 10% nickel, and 2% to 3% molybdenum are the primary components of the stainless steel grade 316, which is also known as the A4 stainless steel grade. Because of this, one of the most significant distinctions between 304 and 316 stainless steel is that 316 stainless steel contains molybdenum, whereas 304 stainless steel does not contain any added molybdenum.
In order to prevent corrosion from chloride, molybdenum is added. Because 316 grade steel also contains trace amounts of silicon, carbon, and manganese, it is more resistant to chemical corrosion at high temperatures, such as that caused by fatty acids and sulfuric acid. This makes 316 stainless steel a desirable material. In addition to this, stainless steel Grade 316 can withstand temperatures as high as 871 degrees Celsius without suffering any damage. Because 304 stainless steel has a slightly lower heat resistance than 316 stainless steel, the latter is frequently used in shipbuilding.
In terms of machinability, stainless steel 304 is more straightforward to process than stainless steel 316. Additionally, because 304 stainless steel is simpler to clean, it is frequently used to make a variety of different finishes. Cutting 316 stainless steel requires specialized equipment because not only is it difficult to machine, but also to cut. As a result, stainless steel 316 is utilized whenever other types of stainless steel are unable to provide the required level of performance for an application.
Because the processing generates relatively large vibrations, working with stainless steel grades 304 and 316 necessitates the utilization of particularly robust pieces of machinery. Carbide or high-speed steel (HSS) tools are available to be used in machining operations. When working at slower cutting speeds, HSS tools perform more effectively. Work hardening is a property shared by all stainless steels in the 300 series; however, stainless steels in the 316 series are more prone to developing work hardening and require additional precautions to avoid it. Things like using knives that are sharper, working at slower speeds, and feeding materials at a higher rate. In order to process 304 stainless steel properly, a slow processing speed is essential. When machining complex parts made of stainless steel 304, using high feed rates to achieve deep cuts can help reduce the amount of work hardening that occurs.
