A flexible core-pulling device for a numerically controlled pipe bender

Abstract

The invention discloses a flexible core pulling device of a numerical control pipe bending machine. A sliding end of a sliding shaft is located in an inner hole of a sliding sleeve; four guiding pillars are fixed in guiding pillar fixing grooves in the inner surface of the sliding sleeve correspondingly, the working surfaces of the guiding pillars are distributed in guiding pillar grooves in the outer periphery surface of the sliding shaft in an embedded mode correspondingly; and a plunger type hydraulic cylinder is installed at the top end of a connecting rod of the sliding shaft, and a wiredrum and a core mold are connected to two ends of a steel wire rope. According to the flexible core pulling device of the numerical control pipe bending machine, a cumbersome pulling rod is replaced with the steel wire rope, a core rod of a traditional core mold of a structure with a core print and with the core rod is reduced, and only a core print is remained, the steel wire rope is directly connected to a head core print, and repeatedly adjustment of the position of the core rod in a pipe fitting, a defect of curving of the pipe fitting caused by excessive extending-out quantity of the corerod and interference of other molds are avoided; and the core mold can be conveniently inserted into the pipe fitting, and the installing time of the core mold is shortened, so that the molding quality is improved.

Description

technical field [0001] The invention relates to a numerically controlled pipe bending device, in particular to a flexible core-pulling device for a numerically controlled pipe bending machine with a pipe diameter greater than 200 mm. Background technique [0002] Pipe CNC bending molds are generally composed of bending molds, pressure molds, anti-wrinkle molds, clamping molds, and core molds with mandrels and multiple core heads. The bending mold is installed on the pipe bending machine, and the bending mold rotates with the spindle of the machine tool. One end of the pipe is clamped by the clamping mold on the bending mold and rotates with the bending mold to complete the bending deformation. In order to improve the bending quality of the pipe fittings, the mandrel Inserted into the pipe fitting, the installation and fixation of the mandrel is realized by connecting the mandrel of the mandrel with the rigid tie rod on the pipe bender. During debugging, the mandrel is connec...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the heavy rigid tie rod of the pipe bender with a pipe diameter larger than 200mm in the prior art, difficulty in installing the core mold, difficulty in debugging the mold, interference of the core rod with the movement of other molds, and poor flexibility of the core pulling device Can be located at the bending tangent point, the present invention proposes a flexible core-pulling device for CNC pipe benders

Images