CN111744982A

CN111744982A - Curved surface stereo combined concave die

Info

Publication number: CN111744982A
Application number: CN202010577414.6A
Authority: CN
Inventors: 马焕群; 李雪静; 马龙; 郑雪花
Original assignee: Qinhuangdao Hanfeng Changbai Crystallizer Co ltd
Current assignee: Qinhuangdao Hanfeng Changbai Crystallizer Co ltd
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2020-10-09
Anticipated expiration: 2040-06-23
Also published as: CN111744982B

Abstract

The invention discloses a curved surface three-dimensional combined female die, which comprises a front end curved surface female die, a middle end variable arc square female die and a rear end variable arc square female die which are combined and connected into a whole through bolts; the inner cavity of the female die of the front end curved surface female die is provided with a circular guide surface, a front guide inclined surface and a ligament formed by a junction; the middle-end arc-variable square-variable female die and the rear-end arc-variable square-variable female die are provided with a first ligament and a second ligament; the central line from the central line of the middle-end arc-variable square female die to the central line of the rear-end arc-variable square female die is an arc central line. Therefore, the blank round copper pipe is directly changed into an arc-shaped and required cross section form through the curved surface three-dimensional concave die, the processing procedure is simplified, the tooling investment is reduced, the cost is reduced, and the round copper pipe can be quickly changed into an arc-shaped square copper pipe, an arc-shaped round copper pipe and copper pipes in various shapes. The problems of complex traditional production process, high cost, large thickness difference of the produced square copper pipe wall, long processing period, low efficiency and the like are solved.

Description

Curved surface stereo combined concave die

Technical Field

The invention relates to a curved surface three-dimensional combined female die which can realize the purpose of quickly changing a round copper pipe into an arc-shaped pipe.

Background

The crystallizer copper pipe is a continuous casting heart and can be produced through a plurality of sequences. If the round copper pipe is directly changed into the arc-shaped square pipe, three stages are needed. The first stage is that a square-changing straight core rod and a concave die are arranged on a horizontal oil press for extrusion, and a round copper pipe is changed into a rectangular copper pipe; the second stage is that a male die and a female die are required to be put into the vertical oil press, and the formed rectangular copper tube is placed between the male die and the female die and pressed into a similar arc shape; and in the third stage, arc square core rods and concave dies with radian are manufactured according to the requirements of the drawing. And (4) installing the die on a horizontal oil press for extrusion forming. The method has the problems of complex production process, high cost, large thickness difference of the wall of the produced square copper pipe, long processing period, low efficiency and the like.

Disclosure of Invention

In view of the technical current situation, the invention provides the curved surface three-dimensional combined female die, which effectively reduces the cost and shortens the supply period, and can quickly finish the change of a blank round copper pipe into a copper pipe with various shapes according to the requirements of drawings.

The technical solution of the invention is as follows: a curved surface three-dimensional combined female die comprises a front end curved surface female die, a middle end arc-variable square female die and a rear end arc-variable square female die which are combined and connected into a whole through bolts; the inner cavity of the female die of the front end curved surface female die is provided with a circular guide surface, a front guide inclined surface and a ligament formed by a junction; the middle-end arc-variable square-variable female die and the rear-end arc-variable square-variable female die are provided with a first ligament and a second ligament; the central line from the central line of the middle-end arc-variable square female die to the central line of the rear-end arc-variable square female die is an arc central line.

In the invention, a positioning key is arranged on the matching end surface among the front end curved surface female die, the middle end variable arc and variable square female die and the rear end variable arc and variable square female die combined female die.

In the invention, lifting screw holes are symmetrically arranged on the middle-end arc-variable square-variable female die.

The invention has the beneficial effects that: can directly become the cross-sectional form of arc and needs with blank round copper pipe through the three-dimensional die of curved surface, simplify manufacturing procedure, reduce the frock input, reduce cost can accomplish round copper pipe fast moreover and become arc square copper pipe, arc round copper pipe and multiple shape copper pipe.

Drawings

FIG. 1 is a view of the assembled female mold of the present invention.

Detailed Description

The invention will be further explained with reference to the embodiments of the drawings.

The curved surface three-dimensional combined female die shown in the figure 1 comprises a front end curved surface female die 1, a middle end variable arc square-changing female die 2 and a rear end variable arc square-changing female die 3. In the invention, the cavity of the front curved surface female die 1 is provided with a round guide surface 6, a front guide inclined surface 7 and a ligament 8 formed by a junction. Ligament 8 is arranged on the vertical plane between the middle variable arc square female die 2 and the rear variable arc square female die 3. The ligament 8 has a certain width, four sides of the ligament 8 are connected in a circular arc manner, and four sides of the ligament 8 are protruded outwards. The anterior part of the ligament 8 is provided with an anterior guide inclined surface 7 and a round guide surface 6, and the posterior part of the ligament 8 is provided with an extension inclined surface. The central line from the middle-end arc-variable square female die 2 to the rear-end arc-variable square female die 3 is an arc central line. The front end curved surface female die 1, the middle end variable arc square female die 2 and the rear end variable arc square female die 3 are combined and connected into a whole through bolts 5. And the matching end surfaces among the front end curved surface female die 1, the middle end variable arc square female die 2 and the rear end variable arc square female die 3 combined female die are provided with positioning keys 4, and the middle end variable arc square female die 2 is symmetrically provided with lifting screw holes which are provided with lifting lugs (not shown). In the above, only the example in which the round copper pipe is directly changed into the arc-shaped square copper pipe is given for explanation. The key of the curved surface stereo combined concave die for implementing the invention is as follows: only one curved surface three-dimensional combined female die and one top plate are required to be arranged on the horizontal oil press, the processed copper pipe is high in arc precision, the thickness difference of the wall of the copper pipe is reduced, the forming efficiency of the copper pipe is improved, and the movement principle of copper pipe forming is met.

The use process of the curved surface three-dimensional combined concave die comprises the following steps: the curved surface stereo combination female die is placed between the horizontal oil press and the host machine, and the lifting machine is used for controlling the curved surface stereo combination female die to move up and down. The blank round copper pipe is horizontally placed in front of the curved surface three-dimensional combined female die by hoisting through the crown block, and the host directly pushes and presses the section of the blank copper pipe to move forward, so that the blank copper pipe is changed into the arc-shaped copper pipe at one time. Seven working procedures are saved before the blank round copper tube is drawn to the finished copper tube, so that the production efficiency is improved, the cost is saved, the labor productivity is reduced, and the processing period is shortened; and preempting the market in advance.

The deformation mode of the copper pipe is as follows: the combined female die is arranged at one end of the machine base, the blank copper pipe is arranged on a top plate of a horizontal oil press at the other end of the machine base, the blank copper pipe enters a front end female die of the combined female die under the action of the horizontal oil press to be extruded into a round variable square pipe shape, continues to enter a middle end female die to extrude the square pipe for shaping and straight bending, and then continues to enter a tail end female die to extrude and extrude a three-point variable arc copper pipe. The forming of the round copper pipe into the arc-shaped square copper pipe can be completed only by one-time extrusion. The working procedures are reduced, and the efficiency is improved.

According to the structural characteristics, different curved surface three-dimensional combination female dies are designed to correspond one to one according to the drawing requirements according to the requirements of different specifications and shapes, such as square, round, rectangular and the like.

If manufacturing an arc-variable square-variable concave die: the bending and square shaping of the copper pipe are realized. The shape of the arc-variable shaping female die is consistent with the size of the square-variable female die, the female die is used for making ligaments along the radius direction of the arc R, the ligaments have a certain width, four sides of the ligaments are connected in an arc mode, and four sides of the ligaments protrude outwards. The front of the ligament is provided with an arc-shaped guide inclined plane and a square-changing guide straight plane, and the rear of the ligament is provided with an extension inclined plane.

And then manufacturing an arc-variable square-variable concave die: the arc shape and the square shape of the copper pipe are realized. The arc-variable square-variable female die is basically consistent with the arc-variable square-variable female die in shape, the ligament is a straight line, four sides of the ligament are connected in an arc shape, a single guide inclined plane is arranged in front of the ligament, and an extension inclined plane is arranged behind the ligament.

The female die is connected and combined: the connecting line of the middle points of the three concave die ligaments is arc-shaped, and the concave die are positioned through a positioning key. Four bolts are used for connection, and the upper part of each female die is respectively provided with a lifting hole.

Claims

1. A curved surface three-dimensional combined female die is characterized by comprising a front end curved surface female die, a middle end variable arc square female die and a rear end variable arc square female die which are combined and connected into a whole through bolts; the inner cavity of the female die of the front end curved surface female die is provided with a circular guide surface, a front guide inclined surface and a ligament formed by a junction; the middle-end arc-variable square-variable female die and the rear-end arc-variable square-variable female die are provided with a first ligament and a second ligament; the central line from the central line of the middle-end arc-variable square female die to the central line of the rear-end arc-variable square female die is an arc central line.

2. The curved surface three-dimensional combined concave die according to claim 1, wherein a positioning key is arranged on a matching end surface between the front curved surface concave die, the middle arc-variable square concave die and the rear arc-variable square concave die.

3. The curved surface three-dimensional combined female die according to claim 1, wherein lifting screw holes are symmetrically formed on the middle-end arc-variable and square-variable female die.