The heat treatment of the butterfly spring workpiece is solution heat treatment + aging heat treatment. The solution heat treatment is 1050±10 ° C, and the temperature is kept for 4 hours, and the air is cooled; the aging heat treatment is completed after the disc spring is pressed and formed. The aging heat treatment process is as follows: 1 The workpiece is placed in a furnace below 150 ° C, vacuum is applied before heating, and the degree of vacuum is 10-1 times; 2 is heated according to the process curve, and nitrogen gas is passed (purity is 99.999%); 3 is heated to 200 ° C. The second vacuum is applied; when the temperature of the furnace reaches 3 °C, the hydrogen gas is started. The ratio of nitrogen to hydrogen should be controlled at 95% N2+5%H2; 5 during the whole heating, heat preservation and cooling process, both nitrogen and hydrogen are passed through during the cooling process. The hydrogen is stopped below 300 °C; 6 the whole process maintains the positive pressure in the furnace, the pressure is controlled at 0.02 ~ 0.1 MPa; 7 cooling is cooled by a propeller, and discharged below 150 °C. Completed on the CSS1120 electronic universal testing machine. According to the requirements of GB/T1972-92, the full compression processing (formation processing) is 1F=1200N, full compression 5 times, each time 30s; 2F=1500N, full compression 5 times, each time 30s; 3F=1200N, static pressure 12h One of these three schemes is selected. The test results show that the effects of several stereotypes on the final geometry and elastic properties of the workpiece are not much different. Considering the improvement of the product manufacturing cycle, the scheme 2 is adopted. Grinding and polishing This process mainly guarantees the height of the disc spring of 1.6±0.03mm, the upper and lower bearing surfaces of 0.2mm, the blunt edge and the surface roughness. After this process, the workpiece should fully guarantee the geometric accuracy of the product shape. This process uses a conventional grinding and polishing process. When the elastic performance test is detected, the upper and lower indenters of the CSS1120 electronic universal testing machine are pressed to 2200N or more to automatically correct the parallelism of the upper and lower indenter planes to eliminate equipment errors. Since the disc spring F1 is obtained when the workpiece compression amount is 0.10 mm, the position where the disc spring is placed in the indenter and the parallelism of the upper and lower planes of the disc spring have a large influence on F1. The position of the disc spring placed in the indenter of the testing machine can be controlled by a simple positioning tool. The parallelity error of the disc spring is controlled by the dial gauge on the flat surface of the test machine by the dial gauge. The force measuring machine is pressurized. Stop reading after 6~10N. The purpose is to give the workpiece a certain pre-pressure to eliminate the difference between the geometric error of the workpiece and other micro-errors. In the subsequent mechanical property testing process, the pre-compression stroke is subtracted from the workpiece compression amount to obtain the accuracy detection result.
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. Ucf Pillow Bearing,Ucf Pillow Block Bearing,Ucf 207 Flange Bearing,Flange Mounted Pillow Block Bearing Shijiazhuang Longshu Mechanical & Electrical Equipment Trading Co., Ltd. , https://www.longsbearings.com
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.
