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Splitter processing

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Update time : 2019-05-14 20:25:55
Simply speaking, the splitter is a machine that assembles the cam and the output turret. It does not require other parts, and can provide multi-station intermittent, swaying, and continuous motion under the action of the driving source. A splitter can also be understood literally as a mechanism or software that divides an item into several or a few pieces, but the splitter here is a stop and rotate motion on the output circumference under the action of a cam mechanism. In order to realize the mechanical action required for machining, the principle of the splitter is also very simple. The indexing cam mounted in the input shaft engages with the output turret to radially insert the cam roller on the circumferential surface of the output turret, and the cam The tapered support ribs make linear contact on their respective bevels. Since the cam structure of the splitter is composed of a myriad of curves with a complex curved structure, the profile machining called cam cam in cam machining is slightly more complicated than other cams.
 

Speaking of the process, we need to talk about the operation principle of the splitter. When the input shaft rotates, the cam roller rotates the output turret according to the given displacement curve, and at the same time rolls along the inclined surface of the rib. In the region where the ribs are balanced with the end faces of the cams, that is, in the static range, the rollers turn on their axes, but the output turret itself does not rotate. The taper support ribs are typically in contact with two or three cam rollers so that the rotation of the input shaft is evenly transmitted to the output shaft. If there is a non-slip condition between the cam surface of the tapered support rib and the cam roller, the splitter is damaged. By adjusting the distance between the axes, the phenomenon of unsmooth rotation can be eliminated. The rigidity of the splitter can be enhanced by adjusting the preload to approximate the elastic areas of the cam rollers and cams. Its structure and function are the best combination of indexing cam and cam roller for high speed operation. From the perspective of the entire mechanical movement, the drive cam plays a crucial role in the splitter.
A simple overview of the processing technology of the splitter cam, milling forming - carburizing heat treatment - rough grinding - fine grinding - inspection, such a process is generally foreign for the more mature processing of cam processing, and for domestic, curved cam Design and processing are still in the stage of exploration and experiment. The commonly used processing technology is rough milling forming - finishing milling - nitriding heat treatment - running adjustment - inspection. From the two process points, in the two stages of heat treatment and fine grinding, domestic and foreign countries are slightly different, because there is a big difference between domestic and foreign in the heat treatment process of the splitter, and most of the foreign countries adopt medium and low carbon. Alloy steel, which adopts carburizing treatment technology, has the advantage that the carburized layer is thicker, generally 0.5-2mm. The purpose of carburizing treatment is to ensure that the carburized layer is uniformly distributed along the contour of the complicated steel piece, quenching and quenching. After low temperature tempering, the hardness of the surface is strengthened, combined with the internal flexibility of the medium and low carbon, so that the splitter cam has strong wear resistance and impact resistance, but the cam deformation during high temperature carburizing is relatively large and must pass The fine grinding of the later stage is carried out to ensure the accuracy of the convex profile. Most of the materials used in the domestic nitriding process are advanced nitrided alloy steels, which are then treated to achieve HB220-280 after quenching and tempering. After nitriding, the surface of the base parts has high hardness and wear resistance. The advantage is that the deformation of the workpiece is very small, but the surface depth of the nitride layer can reach 0.7mm, because the surface is too thin, under the impact and heavy load, it is inferior to the carburizing process, which is also the reason for the short life of the cam. one.
    The heat treatment process of the splitter cam is quite different. Then, why is the domestic cam less using the carburizing technology? The reason here is the difference between the domestic and foreign processing and grinding equipment. At present, there are few professional grinding equipments in China. There is no way to correct the cam deformation after the carburizing process, which is also a drawback in the domestic processing of the splitter cam, and also the difference between the cam price. Technological change and industrial development are a long-term topic. I believe that in the near future, China will also make great progress in various aspects such as machinery industry and technology research and development.

The processing technology of the splitter is closely related to the quality, effect, and life of the product. When selecting the product, the processing technology is also the main condition for product quality reference. It is hoped that the above analysis will be helpful for the demanding manufacturers in the selection of the splitter.
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