At present, China's machine tool industry is developing in five aspects of “high speed, compound, precision, intelligence and environmental protection”, and various new technologies, new materials and new processes will be widely used. The market has increased demand for large-size, large-size, large-tonnage CNC machine tools; customers generally require machine tools to have functions such as compounding, flexibility, and multi-axis linkage. More importantly, machine tools with high precision, high speed and high efficiency will be particularly popular in the market. Timken has a long history of serving the machine tool industry and has been actively developing bearing products that meet market trends and providing superior products and services to Chinese machine tool builders.

Timken's machine tool bearings are comprehensive, including precision angular contact ball bearings, precision tapered roller bearings and crossed roller bearings. These products meet the wide range of bearing requirements for spindles and rotary tables in machine tools.

Timken ^® Fafnir ^® super precision bearings

Angular Contact Ball Bearing

As we all know, the accuracy and quality of the spindle bearings are the key factors affecting the performance of the spindle. For how to define the accuracy level of a precision bearing, ISO/ABEC (ABEC is the ring bearing engineering committee of the American Bearing Manufacturing Association) only defines the width tolerance of the inner and outer rings, roundness, verticality, taper, axial runout, radial beat. In order to achieve high precision, high speed, high stiffness, low vibration and low heat generation of the machine tool spindle, more parameters of the bearing itself need to be controlled.

Timken's precision angular contact ball bearings add parameters not defined by ISO/ABEC to customers, including preload tolerances, functional testing, traceability and micron code, cleanliness, raceway curvature, ball grade and circle Degree, surface finish (functional and non-functional surfaces), steel specifications, cage trim and design, and mounting chamfers. The definition of these parameters improves the quality of Timken's precision angular contact ball bearing products, thereby improving the performance of the machine tool spindle.

For example, Timken ^® Fafnir ^® super precision angular contact bearings have a preload deviation of +/- 2 um. However, this tolerance for similar products in the industry can be as high as +/- 8um, which will result in a bearing with a nominal preload of 560N. The actual preload can be between 178-980N. For a ball screw support bearing with an inner diameter of 40 mm, an excessive preload deviation tolerance of +/- 8 um can cause the preload to vary between +/- 35%. The tight pre-load tight tolerance control of Fafnir ^® super-precision angular contact ball bearings ensures the stability of the spindle stiffness, reduces the repair time of the machine tool customers, and reduces the rolling element slip and heat caused by the bearing manufacturer's preload deviation. As well as bearing damage caused by system unloading, the machine's normal running time is improved.

Functional Testing

Before leaving the factory, Timken will perform 100% functional test on super-precision angular contact ball bearings, and test the super-precision angular contact ball bearings through digital vibration filter analysis to ensure bearing quality and application performance. All test results are traceable.

Cleanliness

Timken's precision bearing products are highly clean, because Timken cleans precision angular contact ball bearings in the cleaning shop, and Fafnir ^® ultra-precision bearing components are typically cleaned with multi-stage solvent for 3 hours. Avoid impurities from entering the bearing and prevent inherent sources of contamination. It is worth mentioning that the cleanliness of the cleaning workshop has reached the level of cleanliness in the operating room of the hospital. In addition, Timken grinds the non-working surface of the bearing to ensure that the bearing is free of impurities before leaving the factory. Therefore, the production of bearing products can increase the normal running time of the machine.

At the same time, in the production process, the technician also controls the curvature and uniformity of the raceway and the grade of the steel ball, reducing the vibration and thus reducing the heat generation. Timken has a wealth of metallurgical knowledge and experience, and has its own special steel production plant, which guarantees the quality of precision bearing raw materials. The bearing steel produced by Timken is one of the purest bearing steels in the world, with no impurities, which increases the service life of the bearings.

Angular contact ball bearings are mainly used for machine tool spindles and ball screws.

Cage

The cage is critical to the machine tool bearings and the performance of the cage can affect the stability of the machine bearings under high speed rotation. The standard cages manufactured by Timken are made of phenolic resin. The internal design and tolerance of the pocket clearance tightly control the guiding surface to ensure optimum stability of the cage during high speed operation, lubrication and dynamic loading.

The precision angular contact ball bearings manufactured by Timken are all Fafnir ^® brands. Precision angular contact ball bearings are available in two structural designs: the high-rigidity WI series and the high-speed HX series for different applications. The basic, open Fafnir ^® HX bearing design features higher spindle speeds and greater dynamic radial stiffness, so the spindle can cut more material in less time while maintaining excellent finished product tolerances. These improvements are attributed to the unique combination of a unique ball body and a precision engineered raceway profile to further increase machining efficiency.

The Fafnir ^® brand has a history of more than 20 years in the development of ceramic ball bearings. The characteristics of ceramic materials give ceramic ball bearings the characteristics of high stiffness, high speed, high temperature resistance and long life, thus meeting the high-end customers' machine tool bearing products. demand.

Timken ^® Fafnir ^® Ball Screw Support Bearings (MMN/MMF Series)

The new MMN/MMF double row ball screw support bearings have leading performance to meet the requirements of the machine for positioning smoothness and accuracy. The low torque integral seal is effective against impurities for more reliable operation and longer life.

The ultra-precision double-row structure supports bidirectional axial loads and also supports composite radial load forces and overturning moments. The innovative cage design accommodates more balls for greater load capacity. ABEC9/ISO P2 axial running tolerances reduce runout and maximize precision in precision machine positioning and repeat positioning. This will allow the machine to achieve maximum productivity while ensuring that the cuts are more accurate and smoother.

The seal unit is available in the Flange Series (MMF) and Non-Flange (MMN) series and is designed to simplify standard nut mounting and swivel nut mounting. The MMF flange series eliminates the need for external clamping of the outer ring. The standard series is a pair of sealed constructions, both of which are available in both enclosed and sealed configurations in either a two- or four-column configuration.

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Welding Neck Flange

The welding neck flange refers to a kind of flange with cone neck and butt welding with cylinder or pipe. It is an integral flange, suitable for high pressure, high temperature or high sealing requirements.

Carbon Steel Welding Neck Flange,Carbon Wn Flange,Raised Face Weld Neck Flange,Long Weld Neck Flange

Jinan Xintai Forging Co., Ltd , https://www.xtdzflange.com