CN206215833U - A kind of riffled tube shaping core bar - Google Patents

Abstract

The utility model discloses a kind of riffled tube shaping core bar, solve core head in the prior art and stuck technical problem easily occurs, riffled tube shaping core bar of the present utility model, including body, one end of the body is set with hollow floating core head and the first nut to the hollow floating core head axial limiting, the other end of the body is set with support ring successively from inside to outside, core head, pad and the second nut to the core head axially position, metal spacer is additionally provided between the core head and the core bar, the core head coordinates with the metal spacer gap, axial length of the axial length of the metal spacer more than the core head, the metal spacer is installed between the support ring and the pad.

Description

A kind of riffled tube shaping core bar

【Technical field】

The utility model is related to a kind of riffled tube shaping core bar.

【Background technology】

In the prior art when copper base pipe is processed, on core bar, one end of core bar is provided with hollow travelling core to copper base pipe sleeve Head, the other end is provided with core head, and during processing, core bar is maintained static, under ball spinning and steel pipe pulling force effect, internal thread Core print is rotated, so that copper pipe inwall produces internal thread, because core head of the prior art is directly set with core bar, and Axial limiting is carried out by the shaft shoulder face on core bar and nut, if so designing, due to core head and spiral shell cannot be ensured The gap between gap and core head and core bar shaft shoulder face between mother, in use, core head is easy Generation stuck phenomenon, so as to cannot continue to process copper base pipe internal thread.

【Utility model content】

Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art and provide a kind of riffled tube Shaping core bar, can effectively prevent core head from occurring stuck.

In order to solve the above technical problems, the utility model is adopted the following technical scheme that：

A kind of riffled tube shaping core bar, including body, one end of the body are set with hollow floating core head and right First nut of the hollow floating core head axial limiting, the other end of the body be set with successively from inside to outside support ring, Core head, pad and the second nut to the core head axially position, the core head and the core bar Between be additionally provided with metal spacer, the core head coordinates with the metal spacer gap, and the axial direction of the metal spacer is long Degree is more than the axial length of the core head, and the metal spacer is installed between the support ring and the pad.

Further, the support ring includes supporting section and avoids section, and the supporting section is located at the avoidance section and described Between core head, the avoidance section diameter is gradually subtracted by the core head towards the hollow floating core head direction It is small.

Further, the pad is bronze pad.

Further, the metal spacer is stainless steel spacer.

Further, the outer circumferential side of the metal spacer is smooth periphery.

The beneficial effects of the utility model：

Riffled tube shaping core bar in the utility model, including body, one end of body are set with hollow travelling core Head and to the first nut of hollow floating core head axial limiting, the other end of body is set with support ring, interior successively from inside to outside Second nut of screw thread core print, pad and internal threads core print axially position, is additionally provided with metal between core head and core bar Spacer, core head coordinates with metal spacer gap, the axial length of the axial length more than core head of metal spacer, Metal spacer is installed between support ring and pad.Compared with prior art, be set with core bar in the utility model metal every Set, core head coordinates with metal spacer gap, and metal spacer internal threads core print is played a supporting role, and metal spacer Axial length is more than the axial length of core head, and metal spacer is installed between support ring and pad, therefore by metal The axial length of spacer and the length difference of the axial length of core head, can adjust the gap between core head and pad And the gap between core head and support ring, it is ensured that the size in gap, the two ends of core head can be prevented effectively from There is friction with support ring and pad respectively and produce damping force, be conducive to the flexible rotating of core head, will not occur stuck Phenomenon, is easy to the machine-shaping of copper pipe internal thread.

Support ring includes supporting section and avoids section, and supporting section is located at and avoids between section and core head, avoids section diameter It is gradually reduced towards hollow floating core head direction by core head.It is so designed that, supporting section can be supported to copper pipe, in case Only it deforms, at the same avoid section be designed to be prevented effectively from its on copper pipe inwall processing inner membrance oil produce hinder make With.

Pad is bronze pad.It is so designed that, it is possible to increase the hardness of pad, does not allow it easy to wear, extends it and use Life-span.

Metal spacer is stainless steel spacer.Stainless steel spacer has high temperature resistant, anticorrosion and acid proof feature, extends it Service life.

The outer circumferential side of metal spacer is smooth periphery.It is so designed that, can further improves the spirit of core head Rotation living.

These features of the present utility model and advantage will be detailed in following specific embodiment, accompanying drawing exposure.

【Brief description of the drawings】

The utility model is described further below in conjunction with the accompanying drawings：

Fig. 1 is the structural representation of riffled tube shaping core bar in the utility model preferred embodiment；

Fig. 2 is the partial enlarged drawing of A in Fig. 1.

【Specific embodiment】

The technical scheme of the utility model embodiment is explained with reference to the accompanying drawing of the utility model embodiment and Illustrate, but following embodiments only preferred embodiment of the present utility model, and it is not all.Based on the implementation in implementation method Example, those skilled in the art obtain other embodiments on the premise of creative work is not made, and belong to this practicality new The protection domain of type.

In description of the present utility model, there is indicating position or the positions such as term "left", "right", " interior ", " outward " The relation of putting is that, based on orientation shown in the drawings or position relationship, description the utility model merely for convenience is described with simplified, and Be not indicate or imply meaning device or element must have specific orientation, with specific azimuth configuration and operation, therefore It is not intended that to limitation of the present utility model.

As shown in figure 1, the riffled tube shaping core bar in the utility model preferred embodiment, including body 1, body 1 Including big footpath section and the path section for being arranged on big footpath section two ends, hollow floating core head 2 is installed in the path section of the left end of body 1, And the left end of body 1 is additionally provided with the big screw rod 10 being connected with path section, big screw rod 10 is provided with and hollow floating core head 2 is axially limited First nut 3 of position, is set with support ring 4, core head 5, pad 7 successively from inside to outside in the path section of the right-hand member of body 1 With the second nut 6, the right-hand member of body 1 is additionally provided with the small screw 11 being connected with path section, and the second nut 6 is locked at small screw 11 On, axially position is carried out with internal threads core print 5, core head 5 is provided with external screw thread, between core head 5 and core bar 1 Metal spacer 8 is additionally provided with, core head 5 coordinates with the gap of metal spacer 8, the axial length of metal spacer 8 is more than internal thread The axial length of core print 5, metal spacer 8 is installed between support ring 4 and pad 7.Compared with prior art, in the utility model Metal spacer 8 is set with path section, core head 5 coordinates with the gap of metal spacer 8, the internal threads core print 5 of metal spacer 8 Play a supporting role, reduce frictional force, and metal spacer 8 axial length more than core head 5 axial length, metal every Set 8 is installed between support ring 4 and pad 7, therefore axial length and the axial direction length of core head 5 by metal spacer 8 The length difference of degree, between can adjust between gap and core head 5 and the support ring 4 between core head 5 and pad 7 There is friction product with support ring 4 and pad 7 respectively in gap, it is ensured that the size in gap, the two ends that core head 5 can be prevented effectively from Raw damping force, is conducive to the flexible rotating of core head 5, and stuck phenomenon will not occur, and is easy to being processed into for copper pipe internal thread Type.

Additionally, support ring 4 includes supporting section 40 and avoids section 41, supporting section 40 is located at and avoids section 41 and core head 5 Between, the diameter for avoiding section 41 is gradually reduced by core head 5 towards the direction of hollow floating core head 2.It is so designed that, supporting section 40 can be supported to copper pipe, to prevent it from deforming, while avoiding section 41 is designed to be prevented effectively from it in copper pipe Processing inner membrance oil on wall produces inhibition.

In order to improve the hardness of pad 7, do not allow it easy to wear, extend its service life pad, in this preferred embodiment Pad 7 be bronze pad.Metal spacer 8 is stainless steel spacer, and stainless steel spacer has high temperature resistant, anticorrosion and acid resistance The characteristics of, can effectively extend its service life, the outer circumferential side of metal spacer 8 is smooth periphery, is so designed that, Neng Goujin One step improves the flexible rotating of core head 5.

The above, specific embodiment only of the present utility model, but protection domain of the present utility model do not limit to In this, it is familiar with the those skilled in the art and should be understood that the utility model including but not limited to accompanying drawing and above specific embodiment party Content described in formula.Any modification without departing from function and structure principle of the present utility model is intended to be included in claims Scope in.

Claims (5)

1. a kind of riffled tube shaping core bar, including body, one end of the body is set with hollow floating core head and to institute State the first nut of hollow floating core head axial limiting, it is characterised in that the other end of the body is set with successively from inside to outside Have support ring, core head, pad and the second nut to the core head axially position, the core head with Metal spacer is additionally provided between the core bar, the core head coordinates with the metal spacer gap, the metal spacer Axial length of the axial length more than the core head, the metal spacer is installed in the support ring and the pad Between.

2. riffled tube shaping core bar according to claim 1, it is characterised in that the support ring include supporting section and Section is avoided, the supporting section is located between the avoidance section and the core head, the avoidance section diameter is by the interior spiral shell Line core print is gradually reduced towards the hollow floating core head direction.

3. riffled tube shaping core bar according to claim 1, it is characterised in that the pad is bronze pad.

4. according to the riffled tube shaping core bar that one of claims 1 to 3 is described, it is characterised in that the metal spacer is Stainless steel spacer.

5. according to the riffled tube shaping core bar that one of claims 1 to 3 is described, it is characterised in that the metal spacer Outer circumferential side is smooth periphery.