Corrugated pipe forming machine

Abstract

The invention relates to a corrugated pipe forming machine, and belongs to the technical field of pipe machining. The corrugated pipe forming machine comprises a frame, an extrusion roller, and a clamping mold for clamping a pipe blank; the frame is provided with a rotary driving unit for driving the extrusion roller and the clamping mold to relatively rotate, an axial feeding driving unit for driving the extrusion roller and the clamping mold to relatively feed and an extrusion feeding driving unit; an extrusion mold groove is peripherally formed in the wheel surface of the extrusion roller;a cross section contour line of the extrusion mold groove comprises two arc parts, and a flat bottom part positioned between the two arc parts; the flat bottom part forms a cord of a circle of the arcparts; a rotating shaft of the extrusion roller is axially perpendicular to the axial direction of a main shaft; and the flat bottom part forms an extrusion mold for forming a groove bottom surface of a thread groove on the pipe blank. The forming machine built by the extrusion roller improved based on the structure can form corrugated pipes with different pitches through change of the ratio of the axial feeding speed to the rotating speed, and can be widely applied to the manufacturing fields of refrigeration, automobiles and aviation.

Description

technical field [0001] The invention relates to pipe material processing equipment, in particular to a corrugated pipe forming machine. Background technique [0002] Bellows, also known as threaded pipe, is often used in heat exchangers, common structures such as figure 1 and figure 2 As shown, the heat exchange area is increased by forming the spiral groove 02 on the pipe body 01 to improve the heat exchange efficiency. [0003] The commonly used publication number is the threaded pipe machine disclosed in the patent literature of CN107127281A to form a threaded groove on the pipe blank, as shown in the accompanying drawings, it includes a feeding unit 3, a rotating drive spindle 45, which is installed on the rotary drive spindle 45 and The extrusion roller 422 is driven by the rotation driving spindle 45 to rotate around the axis of the rotation driving spindle 45 and the extrusion driving unit 424 is used to drive the extrusion roller 4224 to reciprocate along the extr...

AI Technical Summary

Problems solved by technology

[0006] The shape of the extrusion roller used in the aforementioned forming machine is as follows: image 3 As shown, the wheel surface of the extrusion roller 03 is provided with an extrusion punch 030 arranged along its circumference. During the working process of an extrusion roller of this type of structure, as described in the attached patent document 1, Figure 4 As shown, during the working process, the extrusion roller needs to be set at the same angle as the helix angle of the helical groove, so that when it forms a helical groove with a different pitch on the same diameter tube blank, it is necessary to replace a set of extrusion rollers. Press the roller device and re-adjust the angle to ensure that the multi-head extrusion rollers can have a uniform angle, so that the spiral grooves with overlapping corrugations can be processed, which not only requires high operating skills, but also time-consuming

In the development and design stage, it is difficult to determine the appropriate pitch, resulting in the need to back up multiple sets of extrusion rollers, not only high equipment costs, but also high time costs; and it is impossible to develop a bellows structure with variable pitch

[0007] Additionally, using the image 3 The extrusion roller 03 shown is difficult to form such as Figure 4 The shown slightly flat bellows structure 04, such as a bellows structure with an elliptical cross-section of the tube base, can only be used to form a bellows structure with a roughly circular cross-section of the tube base

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