A fast positioning tool for milling hole of eccentric upper head flange

Abstract

The invention discloses a hole-milling quick positioning tool for an eccentric upper sealing head flange. The hole-milling quick positioning tool comprises a positioning ring, a positioning disc, air cylinders, electromagnetic valves and pressing heads, a set of circular-arc-shaped side walls and an eccentric positioning pin are arranged on the positioning disc, the circular-arc-shaped side walls form a cylindrical excircle, the inner-side surface of each circular-arc-shaped side wall and an end-portion plane are connected through a bevel, two bevels form a conical face, the air cylinders extend and contract to drive the pressing heads to press or release a workpiece, a cooling liquid pipeline is arranged inside each of inner columns and outer columns, and a quick plug communicated with the corresponding cooling liquid pipeline is mounted on each of the inner columns and the outer columns. The conical face is formed by the two bevels and plays a role in guiding putting-in of a sealing plate, and convenience is brought to quick putting-in of the sealing plate, so that clamping speed is increased; by means of arranging cooling pipelines inside supporting columns, the cooling pipelines are contained in the supporting columns, so that no space is occupied, structure is simplified, and the objectives of compactness and high efficiency are achieved.

Description

technical field [0001] The invention relates to a machining device, in particular to a quick positioning tool for milling holes of an eccentric upper head flange. Background technique [0002] The eccentric upper head flange is a special flange in the pipeline circulation industry, as attached figure 1 As shown, it includes a circular sealing plate 101, an axis hole 102 is opened on the axis of the circular sealing plate 101, and an axis sleeve 103 is installed on the axis hole 102, and a Four through-holes 106 distributed symmetrically around the axis are used to pass through and fix the measurement signal terminals, and arc-shaped strip holes 104 are arranged around the sealing plate 101 for the installation of seals An irregular groove 105 is recessed and formed on the sealing plate 101 for installing the signal measuring block, and its shape matches it. [0003] At present, the processing technology of the eccentric upper head flange is as follows: firstly, the center ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a quick positioning tool for milling holes of the eccentric upper head flange, which solves the problems of long clamping time, low efficiency, low yield and chaotic arrangement of cooling pipes in the current processing technology, so as to improve The purpose of improving production efficiency and improving the qualified rate of finished products

The present invention is a core device proposed by the applicant based on a new process. The applicant found in many years of processing technology that the structure of the upper head flange is rather special, and the position of the groove on the end surface can be changed, but the groove The distance between a cylindrical blind hole at the end and the axis of the flange is fixed. In order to solve the problem of changing the milling machine many times in the existing processing technology, the applicant found after years of research that the blind hole at the end of the groove is the Datum, multiple positions can be processed at one time. First, a positioning plate is installed on the processing table of the milling machine through locking bolts. A set of arc-shaped side walls and eccentric positioning pins are arranged on the positioning plate. The side wall of the cylinder constitutes the outer circle of the cylinder, and the gap between the two arc-shaped side walls is formed. This gap plays an important role. After the sealing plate is put in, the sealing plate can be adjusted and rotated from the side of the gap. It is conducive to quick alignment and positioning. This outer circle is used as the installation reference of the processed sealing plate. When using it, firstly process the end face of the blank, and after processing a qualified end face, mill a groove on the other end face to process the processed One side of the groove is placed on the positioning plate downwards, and the sealing plate is rotated so that the positioning pin is inserted into the blind hole of the groove. At this time, the sealing plate no longer rotates. A conical surface, the conical surface plays a guiding role when putting in the sealing plate, which is convenient for quickly putting in the sealing plate, thereby increasing the speed of clamping; after positioning is completed, the solenoid valve is used as a switch to drive the cylinder, and the cylinder drives the pressure head to act On the sealing plate, press the sealing plate downward, and the sealing plate is fixed under the cooperation of the side wall, the positioning pin, and the pressure head. At this time, the axis hole, four through holes, and strip-shaped holes can be completed on a milling machine. Hole processing, in the processing process, the sealing plate is only clamped once, which improves the processing efficiency, and the position is fixed, it is easy to clamp, reduces the difficulty of alignment, avoids the inaccurate shape of the clamping, and at the same time a reference as the side The processing standards of the wall, four through holes, and strip holes maintain a high degree of uniformity, which improves the pass rate of finished products to more than 97%; by setting cooling pipes inside the support column, the The cooling pipe is stored in the support column, which does not occupy space and has no messy wiring. By setting the quick-connect plug on the support column, the external pipeline can be used, and the cooling liquid can be used in the process that needs to use the cooling liquid. There is no cooling pipe in the cooling liquid process, which greatly reduces the space occupied by the cooling pipe, simplifies the structure, and achieves the purpose of simplicity and efficiency

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