PROCESS ASSURANCE OF SHAPE ACCURACY OIL AND GAS EQUIPMENT PARTS

The article discusses the issues of technological support for the accuracy of the shape of parts that are part of the shutoff valves used in the production and transportation of oil and gas. Diamond ironing is considered as a finishing method. The ironing scheme with rigid fixation of the indenter is used, since it is this scheme that makes it possible to correct the shape error that was obtained in previous machining operations. As processed materials, steels were considered after strengthening by hardening with high-frequency currents to a hardness of 58... 60 HRC. Machining was done on a CNC lathe. In the course of the experiment, the profile texture in the cross section and the effect of vibrations on it, the dependence of the shape accuracy parameters in the cross section (in our case, the standard deviation of the Fq profile) on the feed and the dependence of the vibration signal power on the feed were studied. The vibration signal was recorded using an accelerometer sensor. In the course of research, it was found that the contribution of vibrations with increasing supply to the overall profile texture increases. There was also a strong correlation between the vibration power and the standard deviation of the profile. In addition, issues of technological heredity have been investigated.