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    About spindle tension gauge

    2016-11-21 09:29:51: Source:


    The spindle tension gauge is a special measuring device for measuring the broach force of the spindle. At present, the provincial and municipal metrological organizations can not realize the verification of the measuring equipment. In this paper, the self calibration of electronic universal testing machine and special calibration device is put forward, and the principle and method of self calibration are expounded. The experiment proves that the method is feasible. Keywords spindle tension gauge; special calibration device; self calibration 0 Introduction Most of the CNC machine tools such as vertical milling, boring, horizontal milling, boring, milling, boring, turning and milling, etc., are mostly taper holes of the machine tool. The taper of the spindle of the machine tool is mostly made up of a group of dish springs. The pulling force of the broaching system tightens the tool and makes the cutter tightly integrated with the spindle. According to the characteristics of the machine tool, the broaching force of each product is different from that of the spindle. The size of the broaching force of each product is different from that of the main axis of the machine tool. It is based on the characteristics of the machine tool. It is based on the characteristics of the machine tool. It is based on the characteristics of the machine tool. It is based on the characteristics of the machine tool. The cutting force of each kind of product is different from that of the main axis. The size of the broaching force of each product is different from that of the main axis. The system is based on the characteristics of the machine tool. It is based on the characteristics of the machine tool. It is based on the characteristics of the machine tool. It is based on the characteristics of the machine tool. It is based on the characteristics of the machine tool. The cutting force of each product is different from The suitable broaching force will tighten the tool tightly and make the tool's taper shank closely contact with the spindle cone hole. The tool clamping is firm and not loose. Otherwise, the tool clamping is not stable, which affects the machining accuracy. For the machining of high precision parts, especially the high precision deep hole processing, the beating and swing of the tool will have greater influence on the machining of the parts. Therefore, it is particularly important to accurately measure the spindle broach force.

    1 using electronic universal testing machine to realize the development of the self calibration method of spindle tension gauge, the Metrology Center and the Li Shu pick spindle tension meter are special measuring equipment for measuring the spindle broach force. At present, the provincial and municipal metrological organizations can not realize the verification of the measuring equipment. In this paper, the self calibration of electronic universal testing machine and special calibration device is put forward, and the principle and method of self calibration are expounded. The experiment proves that the method is feasible. Keywords spindle tension gauge; special calibration device; self calibration 0 Introduction Most of the CNC machine tools such as vertical milling, boring, horizontal milling, boring, milling, boring, turning and milling, etc., are mostly taper holes of the machine tool. The taper of the spindle of the machine tool is mostly made up of a group of dish springs. The pulling force of the broaching system tightens the tool and makes the cutter tightly integrated with the spindle. According to the characteristics of the machine tool, the broaching force of each product is different from that of the spindle. The size of the broaching force of each product is different from that of the main axis of the machine tool. It is based on the characteristics of the machine tool. It is based on the characteristics of the machine tool. It is based on the characteristics of the machine tool. It is based on the characteristics of the machine tool. The cutting force of each kind of product is different from that of the main axis. The size of the broaching force of each product is different from that of the main axis. The system is based on the characteristics of the machine tool. It is based on the characteristics of the machine tool. It is based on the characteristics of the machine tool. It is based on the characteristics of the machine tool. It is based on the characteristics of the machine tool. The cutting force of each product is different from The suitable broaching force will tighten the tool tightly and make the tool's taper shank closely contact with the spindle cone hole. The tool clamping is firm and not loose. Otherwise, the tool clamping is not stable, which affects the machining accuracy. For the machining of high precision parts, especially the high precision deep hole processing, the beating and swing of the tool will have greater influence on the machining of the parts. Therefore, it is particularly important to accurately measure the spindle broach force. 1 overview spindle tension meter is used to measure the taper of the 7:24 spindle tension measurement device, it can quickly measure the spindle force of the machine tool. At present, the spindle tension meter used in the park is SK series, with two readings of digital display and pointer. The accuracy of the spindle tension gauge directly affects the accuracy of the spindle tension measurement, so the spindle tension gauge must be in an accurate state. As a measuring device, periodic inspection must be carried out. As the metrological verification organization of the province or city can not realize the verification of the measuring device, the metrological physical and chemical center will carry out self calibration based on the existing electronic energy testing machine and the designed special calibration device according to the situation of the spindle tension meter used in the park and the structural form and characteristics of the spindle tension meter.
    2 calibration principle, we now design a special calibration device based on the spindle tension gauge of SK50 specifications, and then calibrate the spindle tension gauge for SK30 and SK40 by designing the connecting accessories. The calibration principle is shown in Figure 3. According to the working principle of the spindle tension meter, a set of special calibration device as shown in Fig. 3 is designed. The pull force of the broach system is completed by an electronic universal testing machine. The cone hole of the cone of the 7:24 is used to simulate the spindle hole.
    The spindle tension gauge is placed in the calibration fixture, and the cone of the spindle tension gauge is in close contact with the cone hole of the 7:24 cone. One end of the drawing pin is connected with the test machine, and the other end is connected with the spindle tension meter. After being installed as shown in Fig. 3, the two ends of the calibration device are respectively connected with the two end jig of the electronic universal testing machine, as shown in Fig. 4. Start the computer test software, set the calibration points according to different specifications of the tension meter. The calibration point of SK50 is calibrated by 10KN, and every increase of 2KN is a calibration point. After setting the calibration point, the test speed is selected, the testing machine starts to exert force on the tension meter. At the same time, the value of the tester and the tension meter are read at the same time as the calibration point is reached. After the completion of all calibration points, the clamping device of the tester is released, and the operation is carried out at 180 degree. The operation is repeated 10 times in each direction, and the 10 test data are statistically inaccurate. Calibration calculation.
    3 calibration standard and auxiliary equipment standard: electronic universal testing machine model: CMT5504 measurement range: 0.2kN to 50kN accuracy level: 0.5 level resolution: 1N. Auxiliary equipment: self made calibration device calibration status is shown in Figure 4.
    4 environmental conditions for calibration: ambient temperature is (20 + 5) centigrade, relative humidity is not greater than 80%, temperature fluctuation should not be greater than 2 /h.
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