CN111659809A

CN111659809A - Round pipe expanding and forming die

Info

Publication number: CN111659809A
Application number: CN202010588507.9A
Authority: CN
Inventors: 魏红斌; 林秀娟
Original assignee: Foshan Mingdong Technology Co ltd
Current assignee: Foshan Mingdong Technology Co ltd
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2020-09-15

Abstract

A round pipe expanding forming die comprises a core rod and an expanding outer die arranged on the periphery of the core rod, wherein an upper cover is arranged at the upper end of the expanding outer die in a penetrating mode, a lower cover is arranged at the bottom end of the expanding outer die and connected with the lower cover, the expanding outer die is formed by surrounding a plurality of groups of sub-dies, the cross sections of the sub-dies are of L-shaped structures, the expanding outer die is limited and arranged between the upper cover and the lower cover, hanging strips are axially arranged on the periphery of the core rod in an extending mode, dovetail grooves are formed in the inner sides of the sub-dies corresponding to the hanging strips, and the sub-dies are respectively limited and axially move through the cooperation of the; the die has a simple structure, saves a large amount of materials, can be produced in a large scale, improves the production efficiency of the whole product, has uniform stress and adjustable size, can adjust the forming size according to different materials, reduces the rejection rate, ensures that the sizes of four corners of the manufactured product are uniform, and improves the attractiveness of the product.

Description

Round pipe expanding and forming die

Technical Field

The invention relates to a round pipe processing mold, in particular to a round pipe square expanding forming mold which is used for expanding or squaring a round pipe.

Background

The traditional round pipe needs to be enlarged or expanded, and the round pipe is enlarged or changed into a square by one or more core rods which are larger than the original round or square core rods in a stamping and oil cylinder propelling mode; the manufactured product is that the manufactured circle is not in the same circle center as the original circular tube, or the pipe is subjected to quick and strong external force in a short time, the pipe is broken, and the rejection rate is high.

Disclosure of Invention

The invention improves the prior art aiming at the defects, provides a round pipe square expanding forming die, can solve the poor appearance caused by the traditional forming die, can ensure that the stress of the die in each direction is uniform, reduces the rejection rate and leads the product to be more perfect, and has the following technical scheme:

the utility model provides a circular tubular product expands side forming die, includes that plug and activity card locate the side external mold that expands of its periphery, the upper cover is worn to be equipped with in the upper end of the side external mold that expands, and the bottom is provided with the lower cover, and this upper cover is connected with the lower cover, the side external mold that expands is all around constituteing by the submould of a plurality of groups, and the cross section of this submould all is L shape structure, makes the side external mold that expands spacing setting between upper cover and lower cover, the periphery axial extension of plug is provided with a plurality of groups of lacing bars, the inboard of submould corresponds the lacing bar and has seted up the dovetail to cooperate through dovetail and lacing bar and make the submould spacing axial.

The bottom of the lower cover is connected with the machine body, the upper end face of the machine body is a working platform, and the working platform is fixedly connected with the lower cover.

The working platform penetrates through the mandrel, the bottommost end of the mandrel is fixedly connected with an oil press, and the oil press is fixedly arranged at the bottom of the machine body.

The bottom of the inner side of the machine body is connected with a support frame, an oil press is fixedly connected below the support frame, and a telescopic rod of the oil press penetrates through the support frame.

The outer expanding die is divided into four groups of split dies, the split dies are one fourth of the outer expanding die, four groups of hanging strips are arranged on the periphery of the mandrel corresponding to the split dies in an extending mode, and the hanging strips are arranged around the mandrel in sequence and uniformly.

The two ends of the hanging strip adopt an inclined opening structure.

The hanging strip is of a T-shaped structure.

The square expansion outer die is of a cylindrical structure.

The square expanding outer mold is of a square column structure.

Compared with the prior art, the invention has the beneficial effects that: the whole mechanism of the invention is composed of a core rod with four dovetail grooves on the surface, four quarter circle or square dies, an upper cover and a lower cover, and a set of oil pressure system, the structure is simple, a large amount of materials are saved, large-scale production can be realized, the production efficiency of the whole product is improved, meanwhile, the die is uniform in stress and adjustable in size, the forming size can be adjusted according to different materials, the rejection rate is reduced, the size of four corners of the manufactured product is uniform, and the attractiveness of the product is improved.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced as follows:

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a perspective view of the mandrel of the present invention;

FIG. 3 is a perspective view of the present invention;

FIG. 4 is a perspective view of the present invention;

FIG. 5 is a perspective view of the hanger bar of the present invention in a T-shaped configuration;

the method comprises the following steps: the core rod expanding die comprises a core rod 1, an expanding outer die 2, an upper cover 3, a lower cover 4, a die parting 5, a hanging strip 6, a dovetail groove 7, a machine body 8, a working platform 9, an oil press 10 and a support frame 11.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

Embodiments of the invention will be described in further detail below with reference to the following drawings, in which:

the utility model provides a circular tubular product expands square forming die, expand square external mold 2 of its periphery is located including plug 1 and activity card, upper cover 3 wears to be equipped with in the upper end of expanding square external mold 2, the bottommost is provided with lower cover 4, this upper cover 3 is connected with lower cover 4, expand square external mold 2 and surround by the branch mould 5 of a plurality of groups and constitute, the cross section of this branch mould 5 all is L shape structure, make the spacing setting of expanding square external mold 2 between upper cover 3 and lower cover 4, the periphery axial extension of plug 1 is provided with 6 a plurality of groups of gib, the inboard of branch mould 5 corresponds gib 6 and has seted up dovetail 7, and cooperate through dovetail 7 and gib 6 and make the spacing axial activity respectively of branch mould 5.

The bottom of lower cover 4 is connected with organism 8, and this organism 8 up end is work platform 9, and work platform 9 and lower cover 4 fixed connection, work platform 9 run through have plug 1, and this plug 1's bottom fixedly connected with hydraulic press 10, hydraulic press 10 fixed setting in the bottom of organism 8, and the inboard bottom of organism 8 is connected with support frame 11, and the below fixed connection hydraulic press 10 of this support frame 11, the telescopic link of hydraulic press 10 runs through support frame 11.

The square expanding outer die 2 is equally divided into four groups of split dies 5, the split dies 5 are one fourth of the square expanding outer die 2, four groups of hanging strips 6 are arranged on the periphery of the core rod 1 corresponding to the split dies 5 in an extending mode, the hanging strips 6 are respectively arranged around the core rod 1 in sequence and uniformly, the two ends of each hanging strip 6 are of inclined opening structures, and the square expanding outer die 2 is of a cylindrical structure.

By taking the working principle and combining the structure as an example, the invention adopts the oil cylinder control, controls the vertical extension and retraction of the core rod 1 of the dovetail groove 7 by controlling the vertical extension and retraction of the oil cylinder, so as to realize the horizontal movement of the four sub-dies 5 with the dovetail groove 7 towards four directions, thereby realizing the purposes of expanding square and expanding circle, controlling the vertical extension and retraction amount, controlling the horizontal movement amount and meeting the requirements of different sizes; the different shapes of the contact surfaces of the quarter die 5 and the pipe can be modified to realize the different shapes of the enlarged circle. For example, the four corners are corrugated and strip-shaped.

When the forming die is used, firstly, a round pipe to be formed is sleeved into the die, and the four dies are expanded along the horizontal direction of the dovetail groove 7 by the ascending of the oil cylinder, so that the round pipe can obtain the shape required by people; when different shapes need to be replaced, only one-fourth of the die needs to be replaced, and the expansion of different shapes can be realized without replacing the dovetail groove 7 core rod 1; the mounting modes of the oil cylinder and the split die 5 are vertical mounting and horizontal mounting; the notch shape of the core rod 1 may also be circular or i-shaped.

The whole mechanism of the invention is composed of a core rod 1 with four dovetail grooves 7 on the surface, four quarter circle or square dies, an upper cover 3, a lower cover 4 and a set of oil pressure system, the structure is simple, a large amount of materials are saved, large-scale production can be realized, the production efficiency of the whole product is improved, meanwhile, the die is uniform in stress and adjustable in size, the forming size can be adjusted according to different materials, the rejection rate is reduced, the size of four corners of the manufactured product is uniform, and the attractiveness of the product is improved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a circular tubular product expands square forming die which characterized in that: expand side external mold (2) of locating its periphery including plug (1) and activity card, upper cover (3) are worn to be equipped with in the upper end of expanding side external mold (2), and the bottommost is provided with lower cover (4), and this upper cover (3) are connected with lower cover (4), expand side external mold (2) and surround to form by the branch mould (5) of a plurality of groups, and the cross section of this branch mould (5) all is L shape structure, makes to expand side external mold (2) spacing setting between upper cover (3) and lower cover (4), the periphery axial extension of plug (1) is provided with hanger (6) a plurality of groups, dovetail (7) have been seted up to the inboard of branch mould (5) corresponds hanger (6) to cooperate through dovetail (7) and hanger (6) and make branch mould (5) spacing axial activity respectively.

2. The round pipe square expanding forming die of claim 1, wherein: the bottom of the lower cover (4) is connected with an organism (8), the upper end face of the organism (8) is provided with a working platform (9), and the working platform (9) is fixedly connected with the lower cover (4).

3. The round pipe square expanding forming die as claimed in claim 2, wherein: the working platform (9) penetrates through the mandrel (1), the bottommost end of the mandrel (1) is fixedly connected with an oil press (10), and the oil press (10) is fixedly arranged at the bottom of the machine body (8).

4. The round pipe square expanding forming die as claimed in claim 3, wherein: the bottom of the inner side of the machine body (8) is connected with a support frame (11), an oil press (10) is fixedly connected below the support frame (11), and a telescopic rod of the oil press (10) penetrates through the support frame (11).

5. The round pipe square expanding forming die of claim 1, wherein: the external expanding die (2) is divided into four groups of split dies (5) in a flat mode, the split dies (5) are one fourth of the external expanding die (2), four groups of hanging strips (6) are arranged on the periphery of the mandrel (1) corresponding to the split dies (5) in an extending mode, and the hanging strips (6) are arranged around the mandrel (1) in a surrounding mode sequentially and uniformly.

6. The round pipe square expanding forming die of claim 1, wherein: the two ends of the hanging strip (6) adopt an inclined opening structure.

7. The round pipe square expanding forming die of claim 1, wherein: the hanging strip (6) is of a T-shaped structure.

8. The round pipe square expanding forming die of claim 1, wherein: the square expanding outer die (2) is of a cylindrical structure.

9. The round pipe square expanding forming die of claim 1, wherein: the square expanding outer die (2) is of a square column structure.