Novel finned tube machining method without rotation of workpiece

Abstract

The invention discloses a novel finned tube machining method without rotation of a workpiece, which comprises the following steps: a tube blank is rolled to obtain a prefabricated coil tube; one end of the prefabricated coil tube is introduced into a straightening machine, and the prefabricated coil tube is straightened through the straightening machine; the prefabricated coil tube is subjected to continuous reducing drawing through a drawing machine, the diameter and the wall thickness of the prefabricated coil tube are controlled, and a to-be-machined tube is obtained; a long and thin core rod is sleeved with the to-be-machined tube, a first servo motor drives a hydraulic chuck to rotate, blades revolve around the to-be-machined tube, a second servo motor drives a pull rod to move axially, the blades conduct radial feeding and retracting, and outer fins of the to-be-machined tube are machined; and an internal thread core head is arranged at the position, located at the intersection point of extension lines of the blades, of the long and thin core rod, and the internal thread core head is extruded through blade spinning and deformation of the to-be-machined tube and driven to rotate to machine internal threads. The blades are installed on the hydraulic chuck, the hydraulic chuck rotates to enable the blades to revolve around the to-be-machined tube, and meanwhile the blades rotate to extrude threads of the to-be-machined tube.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a method for processing finned tubes without rotation of coiled tubes. Background technique [0002] Heat exchange tubes designed based on enhanced heat transfer are called high-efficiency heat transfer tubes, also known as finned tubes. The existing method of processing finned tube teeth generally uses rolling equipment to drive the copper tube to rotate through three sets of blades to extrude the thread, and the process is complicated. This processing method has many problems in the processing of the copper tube: such as The inner wall is bruised, only straight pipes can be processed, and the length is limited, so the work efficiency is low. [0003] Publication number CN109732148B relates to a method for processing finned tube teeth, including the following steps: S1. Feeding, inserting the tube material through the nylon headstock and extending through the guid...

AI Technical Summary

Problems solved by technology

The existing method of processing finned tube teeth generally uses rolling equipment to drive the copper tube to rotate through three sets of blades to extrude the thread, and the process is complicated. This processing method has many problems in the processing of the copper tube: such as The inner wall is bruised, only straight pipes can be processed, and the length is limited, so the work efficiency is low

[0003] Publication No. CN109732148B relates to a method for processing finned tube teeth, including the following steps: S1. Feeding, passing the tube material through the nylon headstock and extending through the Pass through the guide sleeve, and make one end of the pipe material correspond to the disc cutter; S2. Adjust the feed position radially, and the radial transmission mechanism of the three cutters will drive the respective disc cutters to approach the center at the same time. By controlling the first motor, the first The reducer moves, the output shaft of the first reducer drives the upper plate of the first slider and the second slider through the coupling, the screw part connected with the coupling and the screw nut matched with the screw part The upper plate moves radially along the first linear guide rail and the second linear guide rail respectively, so the work efficiency is high and the product quality is improved, but the processing process is more complicated

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