The so-called high efficiency is literally high in efficiency, and can be significantly and multiplied in comparison with conventional conventional tools in terms of processing efficiency and service life. This is a different concept from high-speed cutting. The analysis can be carried out with two types of tool examples: drill bit and cutting knife.
U-drill is the first high-efficiency shallow hole drill developed by Sandvik Coromant, which can achieve a maximum length to diameter ratio of 4 times. The appearance of the U-drill changed the efficiency of the hole machining. The cutter head part is a cemented carbide insert. It uses internal cooling and a hard alloy spiral arbor. Its processing efficiency is 3~5 times higher than that of ordinary high-speed steel twist drill. . What is the difference between the two tools? The high-speed steel used in ordinary twist drills has poor heat resistance and poor red hardness, and although it has good toughness, it is not wear-resistant. The tool of cemented carbide has great advantages in wear resistance, but the cost of twist drill of hard alloy material is too high, which is not suitable for large-scale promotion. Therefore, it can be considered that a tool similar to U-drill is a typical hole machining efficient tool.
Cutting knives currently used on CNC machine tools are generally highly efficient tools. Conventional machine tools have low spindle speeds and can only use high-speed steel cutters. The cutting efficiency is not high enough when cutting steel workpieces, not to mention various alloy workpieces, and in addition to the long cutting time due to low speed. It will be easy to use a knife, causing damage to the machine. The indexable carbide insert tool with the machine clamp makes the blade easy to change, which can achieve a large amount of cutting and higher cutting efficiency.
The use of efficient tools also requires technical training and publicity efforts, and the level of awareness of business managers needs to be improved. Traditional machining companies use low-speed common tools to summarize the appropriate cutting parameters and make it a habit, while at the same time avoiding high-speed cutting, which is believed to cause damage to the tool. However, after replacing the high-efficiency equipment of CNC machine tools, the use of high-efficiency tools will lead to machining misunderstandings. In fact, unreasonable high speed will cause tool wear, but it is important to choose reasonable cutting parameters. Many companies are still using low-speed machining after purchasing high-efficiency tungsten steel or carbide tools, but tools are more susceptible to damage. This problem is common.
There are many things that need to be done to change this situation. For example, the Tianjin Metal Cutting Application Technology Association organizes an activity every once in a while to popularize and improve the knowledge of efficient tool application for workers who come to the technical level. It is also possible to publish some popular articles in related publications. Let more workers who see the magazine include technicians and business managers, and strive to improve their technical level and processing awareness, and further increase the popularity of CNC equipment.
The UCF pillow block mounted bearing series has four bolt holes, and a set screw lock is designed for mounting onto bearing surfaces parallel to the shaft axis, such as conveyor belts. This ready-to-mount unit has solid base cast iron housing, chrome steel bearings, and is designed for efficient operation at a wide range of speeds. This one-piece pillow block housing allows for a stationary outer ring and rotating inner ring. Insert bearing maintains the separation between moving parts to reduce rotational friction, and to support radial and axial loads. The bearing is secured to the shaft with set screws to prevent slippage. This mounted bearing is used in food and beverage manufacturing, textile industry and many other industrial manufacturing.
Pillow blocks are usually referred to the housings which have a bearing fitted into them & thus the user need not purchase the bearings separately. Pillow blocks are usually mounted in cleaner environments & generally are meant for lesser loads of general industry. These differ from "plummer blocks" which are bearing housings supplied without any bearings & are usually meant for higher load ratings & corrosive industrial environments. However the terms pillow-block & plummer-block are used interchangeably in certain parts of the world.
However fundamental application of both types is the same which is to primarily mount bearings safely enabling their outer ring to be stationary while allowing rotation of the inner ring. The housing is bolted to a foundation through the holes in the base. Bearing housings are either split type or unsplit type. Split type housings are usually two piece housings where the cap and base can be detached. While certain series are one single piece housings. Various seals are provided to prevent dust and other contaminants from entering the housing. Thus the housing provides a clean environment for the expensive bearings to freely rotate hence increasing their performance and duty cycle.
Bearing housings are usually made of grey cast iron. However various different grades of metals can be used to manufacture the same.
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Shijiazhuang Longshu Mechanical & Electrical Equipment Trading Co., Ltd. , https://www.longsbearings.com