Method for machining flange of drill hole of pipe

Abstract

The invention discloses a method for machining a flange of a drill hole of a pipe. The pipe to be machined is fixed to a clamping die of a CNC machining center, first, a round hole is drilled in the surface of the pipe to be machined through a drill, then the round hole is modified into an oval hole, the drill for the drill hole is replaced to be a drill with a protruding portion, the drill with the protruding portion extends into the inner wall of the pipe from the oval hole, the drill with the protruding portion is driven by the CNC machining center to rotate and lift the flange upwards, the height of the flange of the drill hole is decided by the lifting stroke of the drill with the protruding portion, the lifting stroke is set by the CNC machining center, and after the flange hole is preliminarily formed, the flange hole is polished to be smooth through an edge grinding cutter. According to the method for machining the flange of the drill hole of a pipe, the control machine is automatic, the machining process is fast and simple, if a plurality of flange holes need to be machined in the surface of the pipe, it can be ensured that the multiple flange holes are on the same straight line, the distance between the multiple flange holes also can be precisely controlled, and a machining precision is high.

Description

technical field [0001] The invention relates to a processing method for drilling a hole on the surface of a pipe material and flanging the drilled hole to form a flanging hole. Background technique [0002] At present, the methods of drilling and flanging the boreholes on the surface of the pipe are as follows: 1. A kind of processing equipment for the flanging of the pipe hole in the Chinese utility model patent (notification number CN2905260Y) discloses that the processing equipment can be used for pipes. The method of hole flanging: limit the pipe material in the fixed frame formwork, position the flanging punch on the bottom plate of the supporting form, and penetrate the bottom plate of the supporting form into the pipe with the drilled hole, so that the flanging punch The center line of the center line and the center line of the hole on the pipe are on the same straight line. Lift the bottom plate of the supporting form upward, make the top of the flanging punch penetr...

AI Technical Summary

Problems solved by technology

[0002] At present, the methods of drilling and flanging the boreholes on the surface of the pipe are as follows: 1. A kind of processing equipment for the flanging of the pipe hole in the Chinese utility model patent (notification number CN2905260Y) discloses that the processing equipment can be used for pipes. The method of hole flanging: limit the pipe material in the fixed frame formwork, position the flanging punch on the bottom plate of the supporting form, and penetrate the bottom plate of the supporting form into the pipe with the drilled hole, so that the flanging punch The center line of the center line and the center line of the hole on the pipe are on the same straight line. Lift the bottom plate of the supporting form upward, make the top of the flanging punch penetrate into the hole of the pipe, fix the bottom plate of the supporting form, and then buckle and press the die on the pipe. The bottom end of the tie rod is tightly connected with the flanging punch, and then the pull rod is pulled by the stretching equipment until the pull rod completely pulls the flanging punch out of the hole of the pipe, that is, the outer flanging of the pipe hole is processed. , however, this processing method requires the use of a flanging punch and the processing process is complicated and inconvenient; 2. Put the pipe in the mold and pour liquid into the pipe, and use high-pressure liquid to squeeze the surface of the pipe so that a convex surface extends from the pipe surface. The protruding part, sawing off the tail end of the protruding part will form a flanging hole. In the same way, there is a problem that a mold is needed and the processing process is complicated.

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