One-shot forming device for pipe end face semicircle

Abstract

Disclosed is a device for forming pipe end face semicircles in one step. A pressing die comprises a pressing die upper portion and a pressing die lower portion, a pressing die upper portion semicircle is processed at the bottom of the pressing die upper portion, a pressing die upper portion stamping knife is mounted on the front portion of the pressing die upper portion semicircle, a pressing die lower portion semicircle is processed on the upper portion of the pressing die lower portion, a pressing die lower portion punching knife is mounted on the front portion of the pressing die lower portion semicircle, two pressing die sliders identical in structure are mounted on the undersurface of the pressing die lower portion, and a limiting block is mounted on the side face of the pressing die lower portion. A stamping mechanism is adopted to enable a right-side stamping die to rightwards move along one stamping die slider and a left-side stamping die to leftwards move along the other stamping die slider through force transmission of a slanting wedge, so that the objective of one-time acting two-time stamping is achieved. The objective of stamping is achieved by adopting a mode that the stamping knives move from inside to outside of a to-be-processed pipe, a core rod is not needed, and diameter of the pipe is enabled unchanged under action of the pressing die upper portion stamping knife and the pressing die lower portion stamping knife; the pressing die upper portion and the pressing die lower portion are simple to separate and convenient in blanking.

Description

technical field [0001] The invention relates to a forming device, in particular to a semicircular one-time forming device for a pipe end face. Background technique [0002] At present, in the production of stamping parts in China, the processing of pipe end faces is often encountered, such as punching grooves, punching semicircles, etc., especially for the processing of large-diameter pipe end faces. In the past, punches were used to punch from the outside to the inside. A mandrel is placed inside the pipe to prevent the pipe wall from deforming under the impact of the punch, which makes the process more complicated. The lower part will produce a coating force on the mandrel, which makes demoulding difficult. Now there is also a pendulum punching method. The punching knife swings left and right under the action of external force once to process the semicircle of the end face of the pipe, and it must be punched twice. Contents of the invention [0003] In view of the defic...

AI Technical Summary

Problems solved by technology

[0002] At present, in the production of stamping parts in China, the processing of pipe end faces is often encountered, such as punching grooves, punching semicircles, etc., especially for the processing of large-diameter pipe end faces. In the past, punches were used to punch from the outside to the inside. A mandrel is placed inside the pipe to prevent the pipe wall from deforming under the impact of the punch, which makes the process more complicated. The lower part will produce a covering force on the mandrel, making demoulding difficult. Now there is also a pendulum punching method. The punching knife swings left and right once under the action of external force. For the semicircle processing of the end surface of the pipe, it must be punched twice.

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