CN106853473A

CN106853473A - A kind of zigzag for forming high pressure in pipe is cut somebody's hair

Info

Publication number: CN106853473A
Application number: CN201611108586.9A
Authority: CN
Inventors: 李健; 刘泽彬; 贾宇坤; 宋豪; 冯寿明; 何延之; 李百炼
Original assignee: LIUZHOU FUZHEN CAR BODY INDUSTRY Co Ltd; LIUZHOU KAIRUI TECHNOLOGY Co Ltd
Current assignee: Quanjiao Kangsheng electromechanical Co.,Ltd.
Priority date: 2016-12-06
Filing date: 2016-12-06
Publication date: 2017-06-16
Anticipated expiration: 2036-12-06
Also published as: CN106853473B

Abstract

A kind of zigzag for forming high pressure in pipe is cut somebody's hair, including main body of cutting somebody's hair, body front end of cutting somebody's hair be zigzag seal head, including correcting head and positioned at correcting head behind zigzag seal section, cylinder of the correcting head for diameter less than pipe internal diameter, its front end sets rounding；The zigzag seal section includes that N level lengths are identical, the circular bosses of diameter equal difference increase step by step, chopped-off head circular bosses are with diameter greater than correcting head cylinder diameter, final stage circular bosses diameter forms 15 °~20 ° of gradient less than main diameter of cutting somebody's hair, first, last circular bosses external diameter；The numerical value of above-mentioned N is the arbitrary integer between 3~5.It is good with tubing end sealing that this is cut somebody's hair, the stuck phenomenon of correcting section can be prevented, it is to avoid generation radial load causes pipe end radial dilatation in the presence of thrust, and stuck in mold cavity phenomenon, so that charging feed supplement is more smooth, evenly, beneficial to the shaping of pipe.

Description

A kind of zigzag for forming high pressure in pipe is cut somebody's hair

Technical field

Pushed away the present invention relates to a kind of high-pressure forming mold, more particularly to a kind of zigzag for forming high pressure in pipe Head.

Background technology

While forming high pressure in pipe is by being pressurizeed to tubing internal filled liquid, axially applying side-thrust carries out feed supplement, Force tube billet to fit to mold cavity under the pressure effect of pressure medium, realize a kind of technique of pipe shaping, its pipe The pressure of material internal filled liquid pressurization is generally up to 100MPa-400MPa, and most formation of parts need to also be protected under its high pressure conditions The packing state for holding a period of time can be only achieved preferable forming effect, so end sealing structure quality is for internal high pressure forming Can technique be most important, and can directly influence superelevation pressure condition realize, expection is reached so as to have influence on tubing part forming Effect.

Traditional end sealing is processed into circular conical surface using by the cut somebody's hair front end face of main body of two ends, and circular conical surface is in responsive to axial force It is pushed down into tube end face and realizes sealing, using this kind of sealing structure, there is problems with：

1. during main body of cutting somebody's hair is pressed into, often result in the increase of pipe feeding resistance or be stuck in mold cavity, make mould Or cut somebody's hair abrasion, deformed damaged, have a strong impact on the reliability of mould, the service life cut somebody's hair and work；

2. the radial dilatation of the mouth of pipe is easily caused using this kind of end sealing structure, so as to increase the difficulty of pipe feed supplement, caused into Tube wall is thinning during shape or rupture, and situation severe patient will cause to cut somebody's hair directly stuck in mold cavity with pipe fitting.

3. sealing structure disclosed in Chinese patent CN101011715, one is to easily cause bulging at the pilot hole of two ends or so, Two is the structure of cutting somebody's hair that " with die cavity ", " pilot hole " need to be additionally set using this kind of sealing structure, its complex structure of cutting somebody's hair, manufacture Manufacturability is poor, is more expensive to manufacture, and rubber is softer, because internal pressure is big, is very easy to abrasion, it is often necessary to change, not only Increase cost, and lose time.

4. sealing structure disclosed in Chinese patent CN202097262U, is again provided with tapered sealing surface, though it is also equipped with Thrust platform, but cut somebody's hair under big axial thrust effect, the pipe material that pipe end is contacted with thrust platform of cutting somebody's hair is susceptible to collapse, At this moment due to the presence in conical surface seal face, the radial dilatation of the mouth of pipe can be equally caused during continuation of cutting somebody's hair feeds, is increased The difficulty of pipe feed supplement, tube wall is thinning when causing shaping or ruptures；When there is mismachining tolerance in the heavy platform processing of the pipe end conical surface, due to The heavy platform depth of the pipe end conical surface is too deep, mouth of pipe radial dilatation easily occurs and the heavy platform depth of pipe end is dived and causes conical surface seal occur excessively Face seals not good situation.

The content of the invention

Present invention solves the technical problem that being：For the shortcoming that above-mentioned existing structure is present, there is provided a kind of simple structure, system Make conveniently, it is safe and reliable, can effectively eliminate pipe port expansion and it is stuck in mold cavity for forming high pressure in pipe Zigzag is cut somebody's hair.

The present invention is adopted the technical scheme that：A kind of zigzag for forming high pressure in pipe is cut somebody's hair, including the master that cuts somebody's hair Body, the body front end of cutting somebody's hair is for zigzag seal head, including correcting head and zigzag seal section, and the correcting head is small for diameter In the cylinder of pipe internal diameter, its front end sets rounding；The rear end of correcting head cylinder is zigzag seal section, the zigzag Seal section includes that N level lengths are identical, the circular bosses of diameter equal difference increase step by step, and chopped-off head circular bosses are with diameter greater than correcting head cylinder Diameter, final stage circular bosses diameter forms 15 °~20 ° of gradient less than main diameter of cutting somebody's hair, first, last circular bosses external diameter；

The numerical value of above-mentioned N is the arbitrary integer between 3~5.

Its further technical scheme is：The each circular bosses of zigzag seal section are formed and hung down with main body axial line of cutting somebody's hair Straight small thrust platform, constitutes a big thrust platform vertical with axial line of cutting somebody's hair between final stage circular bosses and main body excircle of cutting somebody's hair.

Because a kind of zigzag for forming high pressure in pipe for taking above technical scheme, the present invention is cut somebody's hair with such as Lower beneficial effect：

1. because body front end of cutting somebody's hair is for zigzag seal head, correcting head sets rounding 111 for front end, is conducive to guiding pipe to enter Enter to cut somebody's hair correcting section, prevents traditional structure from the stuck phenomenon of correcting section occur because manufacture perpendicularity of cutting somebody's hair is bad；

Correcting section is the face of cylinder of slightly smaller than pipe internal diameter, it can be ensured that axial side-thrust stepless action in the pipe end of tubing two, while Strengthen the sealing of toothed segment；Diameter 0.05~0.10mm smaller than pipe internal diameter, the 2~10mm of segment length of the correcting section originally cut somebody's hair, Segment length's value is about the 10% of pipe external diameter but not less than 2mm, no more than 10mm.

2. zigzag seal section be that multiple lengths are identical, the circular bosses of diameter equal difference increase step by step, multistage circular bosses it is oblique Between spending for 15 °~20 °, so as to extrude to form multi-turn rigidity Contact Seal ring with the pipe end conical surface, when pushing away in hydraulic cylinder of cutting somebody's hair Under power effect during the extruded tube end of axial direction, the circular bosses cut somebody's hair in toothed segment form broached-tooth design and produce axial direction to squeeze with the pipe end conical surface Pressure, the scene-affinity of circular bosses is tightly stung the tight pipe end conical surface, is plastically deformed the pipe end conical surface many in the presence of being in thrust Circle rigidity Contact Seal ring；Simultaneously because foring multi-turn in the plastic deformation that the pipe end conical surface extruded with sawtooth is locally produced Small thrust platform, can produce the uniform axial force of multi-turn so that feed supplement is more uniform；Avoid the continuous effect in thrust It is lower generation radial load and cause pipe end radial dilatation so that effectively eliminate pipe port expansion and it is stuck in mold cavity phenomenon, So that charging feed supplement is more smooth, beneficial to the shaping of pipe.

3. when zigzag seal section produces axial thrust not enough, big thrust platform can farthest press tubing pipe end, Making up axial supplement thrust ensures that feed supplement smooth can be carried out, and forms thrust sealing ring enhancing sealing.

The skill cut somebody's hair to a kind of zigzag for forming high pressure in pipe of the present invention with reference to the accompanying drawings and examples Art feature is further described.

Brief description of the drawings

Fig. 1 is that zigzag of the present invention seals structural representation of cutting somebody's hair；

Fig. 2 cuts somebody's hair for zigzag of the present invention sealing and installs and uses view；

Fig. 3 is the A portions enlarged drawing of Fig. 2；

Fig. 4, Fig. 5 cut somebody's hair schematic diagram for prior art；

In figure：

1-main body of cutting somebody's hair, 11-correcting head, 111-rounding, 12-small thrust platform, 13-big thrust platform, 2-upper mould, 3- Pipe, 4-lower mould.

Specific embodiment

As shown in Figure 1, a kind of zigzag for forming high pressure in pipe is cut somebody's hair structure, including main body 1 of cutting somebody's hair, described Body front end of cutting somebody's hair is zigzag seal head, including correcting first 11 and zigzag seal section, the correcting head are diameter less than pipe The cylinder of base internal diameter（The present embodiment using correcting section diameter 0.05~0.10mm smaller than pipe internal diameter, the segment length 2 for cutting somebody's hair~ 10mm, segment length's value is about the 10% of pipe external diameter but not less than 2mm, no more than 10mm）, front end of cutting somebody's hair sets rounding 111；Correcting The rear end of head cylinder is zigzag seal section, and the zigzag seal section includes that 4 level lengths are identical, equal difference increases diameter step by step Circular bosses（The length identical circular bosses refer to that the axial length of circular bosses is identical）, chopped-off head circular bosses are with diameter greater than correcting Head cylinder diameter, less than cutting somebody's hair main diameter, first, last circular bosses external diameter forms 15 °~20 ° oblique to final stage circular bosses diameter Degree.

The each circular bosses of zigzag seal section form the small thrust platform 12 vertical with main body axial line of cutting somebody's hair, this implementation Totally 4 grades of circular bosses form 4 small thrust platforms, wherein final stage to example altogether（4th grade）Circular bosses constitute one with main body excircle of cutting somebody's hair Big thrust platform 13.

As the conversion of above-described embodiment：Length included by zigzag seal section is identical, the diameter circle that equal difference increases step by step The series of boss：The numerical value of N can be the arbitrary integer between 3~5.

Claims

1. a kind of zigzag for forming high pressure in pipe is cut somebody's hair, including main body of cutting somebody's hair（1）, it is characterised in that：It is described to cut somebody's hair Body front end is zigzag seal head, including correcting head（11）With zigzag seal section, the correcting head is diameter less than pipe The cylinder of internal diameter, its front end sets rounding（111）；The rear end of correcting head cylinder is zigzag seal section, the zigzag Seal section includes that N level lengths are identical, the circular bosses of diameter equal difference increase step by step, and chopped-off head circular bosses are with diameter greater than correcting head cylinder Diameter, final stage circular bosses diameter forms 15 °~20 ° of gradient less than main diameter of cutting somebody's hair, first, last circular bosses external diameter；

The numerical value of above-mentioned N is the arbitrary integer between 3~5.

2. a kind of zigzag for forming high pressure in pipe as claimed in claim 1 is cut somebody's hair, it is characterised in that：The sawtooth The each circular bosses of shape seal section form the small thrust platform vertical with main body axial line of cutting somebody's hair（12）；Final stage circular bosses and main body of cutting somebody's hair A big thrust platform vertical with axial line of cutting somebody's hair is constituted between excircle（13）.