Method for completing high-precision machining of valve body hole series on machine tool of machining center.

Abstract

The invention provides a method for completing high-precision machining of a valve body hole series on a machine tool of a machining center. The method comprises the following steps: milling is firstly completed; then a valve body is clamped on the machine tool of the machining center; after the valve body is drilled, expanded, bored and reamed, a rough honing knife, a semi-microhoning knife and a microhoning knife are mounted on the machine tool of the machining center; and vertical honing is completed through once clamping. The method has the advantages that a vertical honing machine is cancelled, and vertical honing is completed on the machining center, so the steps of drilling, expansion, boring, reaming and vertical honing can be completed only through once clamping; since the valve body only needs to be positioned once, the machining precision is greatly improved, the machining time is reduced at the same time, the input cost of equipment is lowered, the production efficiency is improved, the valve hole machining precision is improved by multiple grades, and the valve body is matched with a valve core and can be completely interchanged with the valve core.

Description

technical field [0001] The invention relates to a processing method for a hole system of a valve body of a control element in a hydraulic system. Background technique [0002] The hydraulic valve as the control element in the hydraulic system is mainly composed of valve body, valve core, valve seat, valve cover and other parts. The control element controls the pressure, flow and direction of the oil mainly through the valve body and the valve core. The relative movement between them is realized, relying on the high-precision fit clearance between the two to meet the control requirements, so ensuring the high-precision deep hole machining of the valve body hole system is the most important thing in the processing of valve components. With the development of high technology, the proportion of hydraulic control technology is increasing, traditional heavy machinery is gradually replaced by hydraulic machinery, and the process of this replacement depends largely on the processing...

AI Technical Summary

Problems solved by technology

Due to the large and heavy valve body, it is not suitable to be transported multiple times. What is even more unsatisfactory is that it needs to be repeatedly positioned during the entire processing process, which affects the processing accuracy, so that the dimensional accuracy of the hole can only reach 0.02mm, and the geometric accuracy is 0.003~ 0.005mm, the surface finish is Ra0.8~Ra0.4, which seriously affects the control performance of the hydraulic valve, prolongs the processing time and increases the input cost