Formulation of process benchmarks and processing methods The production of such shaft parts is still carried out on a cylindrical grinding machine. Since the parts are always U and N as the design basis to determine the accuracy requirements of other shapes and key parts dimensions and shape tolerances. Therefore, U and N are also used as the processing reference in actual processing. a) After the quenching and tempering treatment, after the rough grinding outer circle is used as the reference grinding inner hole, the core rod is used for matching, and the top, the thick and the semi-finished outer circle are used as the subsequent processing reference. b) Milling the four side walls of the inner cavity, using electric spark to electrically pulse the inner side wall to ensure the shape tolerance of the four side walls, thereby avoiding deformation drift caused by machining the inner cavity with the elongated tool. c) When the bottom of the square cavity is machined, the lathe adopts a special fixture to position the car, and the hard cavity tool is used to finish the square cavity on the bottom surface to ensure the shape tolerance of the bottom surface, thereby reducing the overall machining difficulty of the whole part. The positioning of the square cavity is completed before nitriding. d) After nitriding, the core rod is still matched, and the outer circle is top-grounded to ensure that the dimensional consistency of the two ends is D0.002; the fine grinding and the outer circle are matched with the left and right bearings to ensure the roundness of 0.001. The gap is less than 0.001-0.004. The detection method has the detection of the horizontal axis position tolerance required for high precision, and needs to be tested by a dedicated device. Therefore, it is recommended to use the roundness test method to detect the roundness of the shaft system to ensure the accuracy of accuracy. Through the processing and its measurement results, it is proved that the improved processing method is feasible and the processing method is reasonable. (Finish) The pillar candle holder is the most widely used candle holder. Because of the large diameter of pillar candles, pillar Candle Holders are mostly placed in the form of trays. In addition to being beautiful, the pillar candle holder must be stable enough and have strong load-bearing capacity. The pillar candle holder can not only put paraffin wax pillar candles, but also flameless pillar candles, glass Jar Candles and so on. Large Candle Holders,Wooden Candle Holders,Pillar Candle Holder,Metal Candle Holders Shijiazhuang Tabo Candles Sales Co., Ltd. , https://www.candlesgiftset.com
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