Difficulties in Manufacturing Process of Turbine Flow Meter Impeller

Abstract: The information on the manufacturing process difficulties of turbine flow meter impeller is provided by the excellent flow meter and flow meter production and quotation manufacturers. The principle of the mechanical part of the intelligent turbine flowmeter is: when the flow flows into the flowmeter, it is adjusted and accelerated under the action of the guiding fluid. Since the impeller and the fluid flow at a certain angle, the turbine generates a rotating torque at this time, which overcomes the friction torque and fluid resistance. . For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following is the details of the article on the manufacturing process of turbine flowmeter impellers. The principle of the mechanical part of the intelligent turbine flowmeter is: when the flow flows into the flowmeter, it is adjusted and accelerated under the action of the guiding fluid. Since the impeller and the fluid flow at a certain angle, the turbine generates a rotating torque at this time, which overcomes the friction torque and fluid resistance. After torque, the turbine starts to spin. The structure of the turbine flowmeter is compact, and the impeller is the key part of the flowmeter and the detection element of the sensor. The impeller is made of high-permeability material duralumin 2A12, which is coaxial with the watch body. The number of blades is usually 12 to 24. The geometry and size of the impeller have a great influence on the performance of the sensor. The rotation angle of the blade and the accuracy of the lead, It is directly related to the accuracy of the turbine flowmeter, that is, the value of the detection linearity. This kind of part is processed for the first time in the company. According to the general process, it is best to be processed in a milling machining center, but this will inevitably increase the processing cost several times. Considering that the flowmeter is still in the R&D and trial production stage, it is necessary to save costs without affecting the dimensional accuracy. Therefore, we decided to process on ordinary horizontal milling according to the processing capacity of the existing equipment in the workshop. The processing difficulties of the impeller are: (1) The material of the impeller is 2A12, the precision of the parts is high, and it is easy to deform during the machining process; (2) The blade wall thickness of the impeller is thin, and its wall thickness is only 1 ~ 2mm. During the processing, its diameter The larger the size, the more severe the vibration of the parts during processing, which has a great impact on the dimensional accuracy, and directly affects the gas flow rate and the value of the detection linearity; (3) The difference between the diameter of the center hole and the outer circle is large, and the coaxiality requires 0.015mm . In view of the above processing difficulties, we have formulated corresponding measures. We have formulated the two sets of process plans comprehensively considering various factors, and formulated the following two process plans: (1) Plan 1. The outer circle of the car, several pieces are integrated—Milling helical blades—Fitter removes burrs—Turning into a single piece, boring and countersinking and outer circle—Slotting—The impeller is dynamically balanced—Surface oxidation treatment. One piece of the plan was tried and processed, but the result was not very satisfactory. Because the thickness of the blade after milling was only 1mm, using it as the positioning reference boring would easily deform the blade, and the coaxiality of the inner and outer circles was difficult to guarantee. The second improvement plan is obtained. (2) Improvement plan two. Rough turning (reserve 1mm on each side, lengthen the left end boss by 15mm, and reserve a chuck for milling)—Heat treatment (the material has heat treatment strengthening ability, so a heat treatment process is arranged after the rough machining of the part to eliminate machining stress)—Fine turning (the hole and the outer circle are cut with one knife, and the soft claw is turned on the head, so as to ensure the coaxiality)——Milling (hanging wheel, constant-velocity helical blade milling with tooling)—pliers (remove all burrs)—Milling (grooving, removing chuck)—The impeller is dynamically balanced—Surface oxidation treatment. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. Difficulties in Manufacturing Process of Turbine Flow Meter Impeller

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