CN203470517U

CN203470517U - Cold-drawn steel tube mold

Info

Publication number: CN203470517U
Application number: CN201320509912.2U
Authority: CN
Inventors: 张长松; 李志刚; 刘爱宏; 王昌敏
Original assignee: JIANGSU TIANYUAN STEEL TUBE CO Ltd
Current assignee: JIANGSU TIANYUAN STEEL TUBE CO Ltd
Priority date: 2013-08-20
Filing date: 2013-08-20
Publication date: 2014-03-12
Anticipated expiration: 2023-08-20

Abstract

The utility model provides a cold-drawn steel tube mold which is simple in structure, good in using effects and capable of effectively preventing an outer mold from being broken by impacts. The cold-drawn steel tube mold comprises an inner mold, the outer mold, a clamp and a buffer assembly, wherein the buffer assembly comprises a buffer ring and a buffer layer; the buffer ring is arranged at one side, far away from the inner mold, of the outer mold and is coaxial to the outer mold; the buffer ring is annular and the inner edge diameter of the buffer ring is greater than the inner edge diameter of the outer mold; the buffer layer is connected between the end surface of the outer mold and the end surface of the buffer ring. When the cold-drawn steel tube mold is in clamping, by virtue of the matched buffering of the buffer ring and the buffer layer, impact force caused by the impact between the end surface of the clamp and the outer mold can be effectively reduced, so that the outer mold is effectively prevented from being damaged by impacts. Besides, annular bulges additionally arranged on the end surface of the buffer ring are capable of effectively lengthening a buffer distance and increasing a contact area, so that the impact force is further reduced.

Description

Cold-drawing steel tube mould

Technical field

The utility model relates to seamless steel pipe and manufactures field, relates in particular to the improvement of cold-drawing steel tube mould.

Background technology

Traditional cold-drawing steel tube mould is comprised of internal mold and adventitia mostly, and it is determined the external diameter of steel pipe after cold-drawn in use conventionally by the internal diameter of external mold; Therefore; It is particularly outstanding that the importance of external mold just seems.Representative portion " compound external mold for cold drawing steel tube " by name, the application number as State Bureau, on May 19th, 2010, announced are the document of " 200910260578.X ", have recorded the compound external mold in a kind of cold-drawing steel tube mould in this case, have representativeness.

Yet, due to external mold in actual production normal with for clamping the end face of the clamp of steel tube head, bump, especially under high-speed production environment, very easily wounded and breakage occurred, thereby cannot continue to use.This has brought great impact to production efficiency and production cost.

Utility model content

The utility model is for above problem, provide a kind of simple in structure, result of use good, can effectively avoid external mold to be wounded and damaged cold-drawing steel tube mould occur.

The technical solution of the utility model is: comprise internal mold, external mold and clamp, described cold-drawing steel tube mould also comprises Buffer Unit, described Buffer Unit comprises buffering ring and cushion, described buffering ring be located at described external mold away from a side of internal mold and with described external mold concentric, described buffering ring in the form of a ring and the diameter of the inner edge of buffering ring be greater than the diameter of the inner edge of described external mold;

Described cushion is connected between the end face of described external mold and the end face of described buffering ring.

Described cushion is dish spring or rubber.

The end face of described buffering ring is provided with a circle annular protrusion, and the cross section of described annular protrusion is curved or trapezoidal.

Described clamp is connected with cushion pad on the end face of described buffering ring, offers the arc groove with described annular protrusion adaptation on described cushion pad.

The utility model is when clamp moves, and the cooperation by buffering ring and buffering ring cushions, and can effectively reduce the impact producing because of collision between the end face of clamp and external mold, thereby effectively avoid external mold wounded and damaged phenomenon occurs.In addition, by the annular protrusion of setting up on the end face of buffering ring, can effectively extend buffer distance and contact area, thereby further weaken impact.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model,

Fig. 2 is the top view of Fig. 1;

Fig. 3 is the structural representation of buffering ring in the utility model,

Fig. 4 is the left view of Fig. 3;

In figure, 1 is internal mold, the 2nd, and external mold, the 3rd, clamp, the 30th, cushion pad, the 4th, Buffer Unit, the 41st, cushion, the 42nd, buffering ring, the 420th, annular protrusion.

The specific embodiment

The utility model as Figure 1-4, comprise internal mold 1, external mold 2 and clamp 3, described cold-drawing steel tube mould also comprises Buffer Unit 4, described Buffer Unit 4 comprises buffering ring 42 and cushion 41, described buffering ring 42 be located at described external mold 2 away from a side of internal mold 1 and with described external mold 2 concentrics, described buffering ring 42 in the form of a ring and the diameter of the inner edge of buffering ring 42 be greater than the diameter of the inner edge of described external mold 2;

Described cushion 41 is connected between the end face of described external mold 2 and the end face of described buffering ring 42.Like this, when clamp moves, can effectively reduce the impact producing because of collision between the end face of clamp and external mold, thereby effectively avoid external mold wounded and damaged phenomenon occurs.

Described cushion 41 is dish spring or rubber.

The end face of described buffering ring 42 is provided with a circle annular protrusion 420, and the cross section of described annular protrusion 420 is curved or trapezoidal.By annular protrusion, can effectively extend buffer distance and contact area, thereby further weaken impact.

Described clamp 3 is connected with cushion pad 30 on the end face of described buffering ring 42, offers the arc groove with described annular protrusion 420 adaptations on described cushion pad 30.By coordinating of the arc groove with annular protrusion adaptation, make in both sides' contact area, to play effective positioning action when increasing buffering.

Claims

1. cold-drawing steel tube mould, comprise internal mold, external mold and clamp, it is characterized in that, described cold-drawing steel tube mould also comprises Buffer Unit, described Buffer Unit comprises buffering ring and cushion, described buffering ring be located at described external mold away from a side of internal mold and with described external mold concentric, described buffering ring in the form of a ring and the diameter of the inner edge of buffering ring be greater than the diameter of the inner edge of described external mold;

2. cold-drawing steel tube mould according to claim 1, is characterized in that, described cushion is dish spring or rubber.

3. cold-drawing steel tube mould according to claim 1, is characterized in that, the end face of described buffering ring is provided with a circle annular protrusion, and the cross section of described annular protrusion is curved or trapezoidal.

4. cold-drawing steel tube mould according to claim 3, is characterized in that, described clamp is connected with cushion pad on the end face of described buffering ring, offers the arc groove with described annular protrusion adaptation on described cushion pad.