CN211613955U

CN211613955U - Pipe with folded edge

Info

Publication number: CN211613955U
Application number: CN202020017859.4U
Authority: CN
Inventors: 熊爱军
Original assignee: Huizhou Liyang Hardware Products Co ltd
Current assignee: Huizhou Liyang Hardware Products Co ltd
Priority date: 2020-01-06
Filing date: 2020-01-06
Publication date: 2020-10-02
Anticipated expiration: 2030-01-06

Abstract

A pipe with a folded edge comprises a pipe with a preset length, wherein one end of the pipe is provided with a conical head, and the inner wall of the conical head is provided with a circle of inner folded edge perpendicular to the inner wall of the pipe; at least one convex strip arranged axially is arranged on the inner wall of the tube. The utility model has the advantages of can form the component on the inner wall or the outer wall of metal tubular product, and the one end of metal tubular product is the cone to form inside hem at the end of cone.

Description

Pipe with folded edge

Technical Field

The utility model relates to a take tubular product of hem.

Background

In the prior art, an inward folded edge perpendicular to an inner wall is formed on the end face of a metal pipe, and the method generally comprises two methods, namely firstly folding the edge of a plate, then rolling the plate into a cylinder, welding the folded edge by a welding method, and then removing a welding line by a grinding and polishing method. This method is generally suitable for the flanging of metal pipes with thin walls, and also for the case where the inner and outer walls are smooth; the other method is a processing method suitable for flanging a metal pipe with a thicker pipe wall, namely, the processing method is realized by adopting a corresponding bar material and a machining mode, and the condition that convex strips or grooves are arranged on the inner wall or the outer wall can be realized at the same time. However, the main problem with this approach is the high tooling costs. By searching Chinese patents, a better method for forming a folded edge perpendicular to an inner wall on the end face of a metal pipe is not found at present, and particularly, the folded edge can be formed on the end face of the metal pipe, meanwhile, other shape components are required to be arranged on the inner wall of the pipe, and the pipe which is difficult to realize is that one end of the pipe is a conical head, and the inward folded edge is formed on the end of the conical head.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem, provide one kind to the society and can form the component on the inner wall or the outer wall of metal tubular product, and the one end of metal tubular product is the cone to form the tubular product of taking the hem of inside hem at the end of cone.

The technical scheme of the utility model realizes being: a pipe with a folded edge comprises a pipe with a preset length, wherein one end of the pipe is provided with a conical head, and the inner wall of the conical head is provided with a circle of inner folded edge perpendicular to the inner wall of the pipe; at least one convex strip arranged axially is arranged on the inner wall of the tube.

As an improvement of the utility model, the conical angle of the conical head is selected between 8-12 degrees.

As an improvement of the utility model, the outer diameter of the shaped pipe is selected between 14mm and 16 mm.

As an improvement of the utility model, the width of the inner folded edge is selected between 2mm and 4 mm.

As an improvement to the present invention, the shaped pipe is made of an aluminum alloy material.

As an improvement of the utility model, the pipe is made of magnesium alloy material.

The utility model has the advantages of can form the component on the inner wall or the outer wall of metal tubular product, and the one end of metal tubular product is the cone to form inside hem at the end of cone.

Drawings

FIG. 1 is a schematic structural diagram of a blank profile in the method of the present invention.

Fig. 2 is a schematic plan view of fig. 1 after the head is retracted.

Fig. 3 is a schematic view of the drawing die structure of the present invention.

FIG. 4 is a schematic view of the drawing mold with the reduced head portion removed;

FIG. 5 is a schematic view of the cut tube of the present invention.

Fig. 6 is a schematic structural view of the cone head according to the present invention.

FIG. 7 is a schematic view of the structure of the processed pipe shown in FIG. 6.

Fig. 8 is a schematic view of the folding structure of the present invention.

Fig. 9 is a schematic view of the final product structure.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art. In addition, in the description of the present invention, "a plurality" or "a plurality" means two or more unless otherwise specified.

The utility model provides an inward flanging processing method of metal pipe end face, including following process:

(1) fine suction tube

(11) Shrinking head

Adopting a head shrinking tool to shrink one end of a blank circular section bar 1 (as shown in figure 1, the blank circular section bar is a circular tube with a convex strip 11 arranged on the inner long inner wall, the circular tube can be produced by a die casting factory in a customized way or can be produced by the self manufacturer in a die casting way) with a preset length to form a head shrinking part 12 (as shown in figure 2), wherein the outer diameter D of the head shrinking part 12 of the blank circular section bar 1 after shrinking is smaller than the inner diameter 211 of a pipe drawing external mold 21 (as shown in figure 3); the blank round section bar 1 in the utility model can be produced by entrusting a metal tube pressure casting factory, and can also be produced by a pressure casting mode; the head shrinking tool of the utility model can shrink the head by a die tool or a manual hammer;

(12) preparation drawing round tube

The head reducing part 12 of the blank round section bar 1 which is reduced to the head passes through a pipe drawing external mold 21, an internal mold 22 extends into the blank round section bar 1 through an internal mold rod 23 and reaches a preset position, the distance between the outer wall of the internal mold 22 and the inner wall of the pipe drawing external mold 21 is equal to the required wall thickness of the formed round section bar 3, a groove (not visible in the drawing) on the internal mold 22 is clamped on a convex strip 11 (shown in figure 3) of the blank round section bar 1, and the width and depth of the groove on the internal mold 22 are equal to the width and height of a forming convex strip 31 (shown in figure 4) on the formed round section bar 3;

(13) round tube for drawing

Still referring to fig. 3, the head 12 of the blank circular section bar 1 is clamped by a clamp 24, the blank circular section bar 1 is pulled by a traction device (not shown) to be pulled out of the die forwards, and a formed circular section bar 3 with the wall thickness and the width and height of the convex strip meeting the requirements is obtained;

(2) cutting section bar

(21) Cutting off the reduced head of the shaped round profile (see fig. 4);

(22) cutting the remaining shaped circular section into shaped tubes 4 of predetermined length (see figure 5);

(3) removing a protruding strip (not shown) with a preset length on the inner wall;

removing the convex strips with preset length on the inner wall of one end of the conical head and the folded edge to be formed by a cutting device; the convex strips with the preset length on the inner wall are removed for the convenience of flanging, so that the flanging effect is not influenced by the inconsistent wall thickness of the type pipe 4;

(4) forming of conical head

The end of which the convex strips are removed is molded into a conical head 41 (see fig. 7) with a preset angle by using a conical head forming die, the forming die comprises a female die 51 and a die core 52 (see fig. 6), the female die 51 is provided with a die cavity 511 with a taper, the taper of the die cavity 511 is consistent with the taper of the finally molded pipe 4, and the front end of the die core 52 is provided with a conical head 521 consistent with the taper of the die cavity 511; when in use, the shaped pipe 4 is sleeved on the mold core 52 and inserted into the mold cavity 511 of the female mold 51, the female mold 51 is rotated, and simultaneously, the mold core 52 is applied with a force F1 towards the female mold 51, and a conical head 41 can be formed on the head of the shaped pipe 4 after a predetermined time;

(5) folding edge

The pipe 4 with the conical head 41 is sleeved on a second mold core 6, the second mold core 6 is provided with the conical head 61, the conical head 61 is made to extend into the conical head 41 of the pipe 4, a preset distance L is reserved between the conical head 41 and the end face, the pipe 4 rotates at a high speed, a rotatable folding wheel 62 is applied with force F2 from the side face of the conical head 41 to a preset distance L away from the end face of the conical head 41, and the pipe with the preset distance L is folded into the pipe to form a folding edge 411 which is perpendicular to the inner wall of the pipe.

The utility model discloses do not need complicated hem technology, just can realize just forming the component on the inner wall or the outer wall of metal tubular product with the method of drawing the mould, and the one end of metal tubular product is the cone to form the effect of inside hem at the end of cone.

Preferably, there is an end face flattening step (6) after the step (5), and there may be a problem that the end face of the flange 411 is not flat due to the flange 411 folded by the folding wheel 62, and at this time, the outer end face of the flange may be flattened by a cutting means.

Preferably, a center hole correcting step (7) is further provided after the end face flattening step (6), and since the inner hole formed by the folded edge 411 folded by the folding wheel 62 is not a regular hole, the irregular hole formed by the folded edge is corrected into a round hole by a drill; of course, if the irregular holes can also meet the requirements of users, the irregular holes are not corrected into round holes.

Preferably, after the center hole correcting step (7), there is an outer surface polishing step (8) of polishing the outer surface of the pipe 4 with the tapered head and the folded edge made with a polishing material.

The utility model also provides a type pipe 4 with a hem made by the method.

Referring to fig. 9, the present invention further provides a pipe with a folded edge, which includes a pipe 4 with a predetermined length, wherein a conical head 41 is disposed at one end of the pipe 4, and a circle of inner folded edge 411 perpendicular to the inner wall of the pipe is disposed on the inner wall of the end face of the conical head 41; at least one rib 31 arranged axially is provided on the inner wall of the tube 4.

Preferably, the taper angle of the conical head 41 is selected between 8 and 12 degrees.

Preferably, the outer diameter of the shaped tube 4 is chosen between 14mm and 16 mm.

Preferably, the width of the inner flap 411 is selected between 2mm and 4 mm.

Preferably, the pipe 4 is made of an aluminum alloy material.

Preferably, the type pipe 4 is made of a magnesium alloy material.

The utility model provides a take tubular product of hem can be used for the tobacco pipe of electron cigarette. The utility model discloses can make the cost that the tobacco pipe was made descend by a wide margin, also can realize batch production.

Claims

1. The pipe with the folded edge is characterized by comprising a pipe with a preset length, wherein one end of the pipe is provided with a conical head, and the inner wall of the conical head is provided with a circle of inner folded edge perpendicular to the inner wall of the pipe; at least one convex strip arranged axially is arranged on the inner wall of the tube.

2. A flanged pipe according to claim 1, wherein the taper angle of the conical head is selected between 8 and 12 degrees.

3. A flanged pipe according to claim 1 or 2, wherein the outer diameter of the pipe is selected between 14mm and 16 mm.

4. A flanged pipe according to claim 1 or 2, wherein the width of the inner flange is selected between 2mm and 4 mm.

5. A flanged pipe according to claim 1 or 2, wherein the pipe is of an aluminium alloy material.

6. A flanged pipe according to claim 1 or 2, wherein the pipe is made of a magnesium alloy material.