CN215845291U

CN215845291U - High pressure fuel pipe cold-heading mould

Info

Publication number: CN215845291U
Application number: CN202121142498.7U
Authority: CN
Inventors: 朱凯佳; 王德银; 冯宁
Original assignee: SHANGHAI TONGHE MARINE EQUIPMENT Ltd
Current assignee: SHANGHAI TONGHE MARINE EQUIPMENT Ltd
Priority date: 2021-05-25
Filing date: 2021-05-25
Publication date: 2022-02-18
Anticipated expiration: 2031-05-25

Abstract

The utility model provides a high-pressure oil pipe cold heading die which comprises a clamping die and a head section die matched with the clamping die, wherein a forming groove is formed in the head section die, a through hole is formed in the center of the forming groove in the head section die, an ejector pin is arranged in the through hole, an installation groove matched with the forming groove is formed in the large plane of the clamping die, and a pressing ring is installed in the installation groove; when the oil pipe head is formed, the inner wall of the pressing ring is tightly matched due to the deformation of the outer circle and the head of the oil pipe, so that stable sleeving is formed, the purpose of forming the oil pipe head in one step is achieved, and the production efficiency of the oil pipe is improved.

Description

High pressure fuel pipe cold-heading mould

Technical Field

The utility model mainly relates to the technical field of cold heading dies, in particular to a high-pressure oil pipe cold heading die.

Background

The high pressure fuel line serves as a connecting passage between the fuel pump and the fuel injector in the internal combustion engine and functions to deliver fuel into the internal combustion engine. With the increasing emission requirements of internal combustion engines, the fuel injection pressure requirements increase. In view of this, high pressure oil pipes are also required to have extremely high internal pressure resistance, high sealability, fatigue resistance and high cleanliness.

When the head of the high-pressure oil pipe is subjected to cold heading forming, the position of the cavity of the head of the cold heading die is fixed relative to the cold heading die body, and the large excircle backs at two ends of the high-pressure oil pipe of the cold heading head are provided with a pressing ring, so that the high-pressure oil pipe is prevented from being damaged due to the fact that a locking nut is directly stressed on the back plane of a cold heading head forming die in the using process, and the head forming die is protected. The common cold heading process of the oil pipe is that under the combined action of a clamping die and a head die, the head of the oil pipe is formed in a cold heading mode once, then a pressing ring is sleeved on a large excircle of the head of the oil pipe and is pressed with a head back plane, so that the efficiency is relatively low, and meanwhile due to secondary sleeving, certain stress concentration can exist between an inner hole of the pressing ring and the head back excircle of the oil pipe, and the use of the oil pipe is unfavorable.

SUMMERY OF THE UTILITY MODEL

The utility model mainly provides a cold heading die for a high-pressure oil pipe, which is used for solving the technical problems in the background technology.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

the utility model provides a high pressure fuel pipe cold-heading mould, including pressing from both sides tight mould, with pressing from both sides tight mould complex head section mould, wherein, it has the shaping groove to open on the head section mould, the central point of shaping groove puts to open in the head section mould has the through-hole, be equipped with the thimble in the through-hole, the big plane department of pressing from both sides tight mould open have with shaping groove complex mounting groove, install the clamping ring in the mounting groove.

Furthermore, threaded holes are formed in the periphery of the head die, and fixing holes connected with the threaded holes are formed in the periphery of the large plane of the clamping die.

Furthermore, the excircle and the axial length of mounting groove all are slightly greater than the clamping ring.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model relates to a high-pressure oil pipe cold heading die, which is characterized in that a mounting groove is formed in the large plane of a clamping die, the clamping die is used for clamping an oil pipe in the cold heading process, a pressing ring is sleeved on the oil pipe and is placed in the mounting groove of the clamping die, and under the matching of a head die, when the head of the oil pipe is formed, the inner wall of the pressing ring is tightly matched due to the deformation of the excircle and the head of the oil pipe to form stable sleeving, so that the aim of forming the head of the oil pipe at one time is fulfilled, and the production efficiency of the oil pipe is improved.

The present invention will be explained in detail below with reference to the drawings and specific embodiments.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

In the figure: 1. clamping the die; 2. a head mold; 11. mounting grooves; 12. a compression ring; 13. a fixing hole; 21. forming a groove; 22. a thimble; 23. a threaded bore.

Detailed Description

In order to facilitate an understanding of the utility model, the utility model will now be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the utility model are shown, but which may be embodied in different forms and not limited to the embodiments described herein, but which are provided so as to provide a more thorough and complete disclosure of the utility model.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, as the terms "vertical", "horizontal", "left", "right" and the like are used herein for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the knowledge of the terms used herein in the specification of the present invention is for the purpose of describing particular embodiments and is not intended to limit the present invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Please refer to fig. 1 in greater detail, a high pressure oil pipe cold heading die, which includes a clamping die 1 and a head die 2 matched with the clamping die 1, wherein the head die 2 is provided with a forming groove 21, a through hole is provided in the center of the forming groove 21 towards the head die 2, a thimble 22 is provided in the through hole, a mounting groove 11 matched with the forming groove 21 is provided on the large plane of the clamping die 1, and a pressing ring 12 is provided in the mounting groove 11; the excircle and the axial length of the mounting groove 11 are slightly larger than those of the compression ring 12.

Threaded holes 23 are formed in the periphery of the head die 2, and fixing holes 13 connected with the threaded holes 23 are formed in the periphery of the large plane of the clamping die 1; so that the molding groove 21 corresponds to the position of the mounting groove 11.

The utility model provides a combined type oil pipe head type cold heading die, wherein a mounting groove 11 of a pressing ring 12 is designed at a large plane of a clamping die 1, the excircle and the axial length of the mounting groove are both larger than the relevant sizes of the pressing ring 12, when the die works, the pressing ring 12 is sleeved on an oil pipe, and the pressing ring 12 is placed in the groove of a clamping die, so that the inner wall of the pressing ring 12 is tightly matched due to the deformation of the excircle and the head of the oil pipe during the head forming process in the cold heading process, stable sleeving is formed, and the production efficiency of the oil pipe is improved.

The utility model is described above with reference to the accompanying drawings, it is obvious that the utility model is not limited to the above-described embodiments, and it is within the scope of the utility model to adopt such insubstantial modifications of the inventive method concept and solution, or to apply the inventive concept and solution directly to other applications without modification.

Claims

1. The utility model provides a high pressure fuel pipe cold-heading mould, including pressing from both sides tight mould (1), with pressing from both sides tight mould (1) complex head mould (2), its characterized in that, it has shaping groove (21) to open on head mould (2), the central point of shaping groove (21) puts and has seted up the through-hole to head mould (2), be equipped with thimble (22) in the through-hole, the big plane department of pressing from both sides tight mould (1) is opened and is had and form groove (21) complex mounting groove (11), be used for installing clamping ring (12) in mounting groove (11).

2. The cold heading die for the high-pressure oil pipe as claimed in claim 1, wherein threaded holes (23) are formed in the periphery of the head die (2), and fixing holes (13) connected with the threaded holes (23) are formed in the periphery of the large plane of the clamping die (1).

3. The high-pressure oil pipe cold heading die as claimed in claim 1, wherein the mounting groove (11) has an outer circumference and an axial length slightly larger than those of the pressing ring (12).