CN217451844U

CN217451844U - Pipe fitting throat former

Info

Publication number: CN217451844U
Application number: CN202221144879.3U
Authority: CN
Inventors: 田飞; 庞卫华; 孙钜圣
Original assignee: Changen Fine Machine Changxing Co ltd
Current assignee: Changen Fine Machine Changxing Co ltd
Priority date: 2022-05-12
Filing date: 2022-05-12
Publication date: 2022-09-20
Anticipated expiration: 2032-05-12

Abstract

The utility model relates to a pipe fitting throat former, including first roof pressure component, set up first roof pressure axle on first roof pressure component, connect and be in the epaxial throat outer mould of first roof pressure and fixed setting are in mold core in the throat in the outer mould of throat still is in including setting up the top pipe box and the drive of mold core rear end in the throat the top pipe box is relative the second roof pressure component of mold core back-and-forth movement in the throat. The utility model discloses a set up the ejector sleeve cover between outer mould of throat and the interior mold core of throat, can withstand the steel pipe tip when the mold core resets the removal backward in outer mould of throat and the throat, exert axial thrust at the steel pipe tip for the smooth separation of mold core in steel pipe and the outer mould of throat and the throat.

Description

Pipe fitting throat former

Technical Field

The utility model relates to a pipe end former technical field, in particular to pipe fitting throat former.

Background

In the process of producing and processing steel pipes, the end parts of the steel pipes are required to be reduced, and at present, the steel pipes are generally processed by using a steel pipe reducing machine. The necking machine is a non-cutting processing device, when in use, a fixing device is generally used for fixing a steel pipe, and then one end of the steel pipe needing necking is sent into a necking die of the necking machine, so that the necking of the steel pipe is realized.

The present steel pipe necking equipment, for example, chinese utility model patent with publication number CN213793852U discloses a steel pipe necking device, because the necking die and the steel pipe of necking machine need great pulling force just can separate both after accomplishing the necking, and the necking machine of the device outwards expands the fixed steel pipe at necking in-process arc in the steel pipe, this kind of fixed mode loses the steel pipe inner wall easily, and the frictional force undersize of arc and steel pipe inner wall can't carry out axial fixity to the steel pipe when expanding the undersize, lead to necking die and the unable effective separation of steel pipe.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pipe fitting throat former solves among the prior art problem that throat mould and steel pipe can't separate after accomplishing the throat.

The above object of the present invention can be achieved by the following technical solutions: a pipe fitting necking forming device comprises a first jacking element, a first jacking shaft arranged on the first jacking element, a necking outer die connected to the first jacking shaft, a necking inner die core fixedly arranged in the necking outer die, a jacking pipe sleeve arranged at the rear end of the necking inner die core and a second jacking element driving the jacking pipe sleeve to move back and forth relative to the necking inner die core.

Preferably, the pipe reducing mechanism further comprises a first mounting seat connected to an end of the first jacking shaft, a mandrel connected between the second jacking element and the necking inner mold core, and a second mounting seat connected between the first mounting seat and the necking outer mold, wherein the second mounting seat is sleeved on the outer side of the mandrel, and the pipe jacking sleeve is sleeved between the second mounting seat and the mandrel.

Preferably, an axially through hole is formed in the first jacking shaft, the second jacking element is fixed to the rear side of the first jacking element, the second jacking element is provided with a second jacking shaft, the second jacking shaft penetrates through the through hole of the first jacking shaft, a push rod is connected between the second jacking shaft and the jacking pipe sleeve, and the push rod penetrates through the first mounting seat.

Preferably, the push rods are uniformly distributed along the circumference of the mandrel, and a connecting plate for connecting the push rods is arranged at the end part of the second jacking shaft.

Preferably, the outer diameter of the top pipe sleeve is smaller than or equal to the minimum inner diameter of the necking outer die, and the inner diameter of the top pipe sleeve is larger than or equal to the outer diameter of the rear end of the necking inner die core.

Preferably, the rear end of the outer necking die is provided with a flaring structure which is convenient for the end part of the top pipe sleeve to enter the outer necking die.

The utility model has the advantages that: the utility model discloses a set up the ejector sleeve cover between outer mould of throat and the interior mold core of throat, can withstand the steel pipe tip when the mold core resets the removal backward in outer mould of throat and the throat, exert axial thrust at the steel pipe tip for the smooth separation of mold core in steel pipe and the outer mould of throat and the throat.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention;

fig. 2 is a cross-sectional view of an embodiment of the invention;

in the figure: 1-necking outer die, 2-necking inner die core, 3-first jacking element, 301-first jacking shaft, 302-through hole, 4-jacking pipe sleeve, 5-second jacking element, 501-second jacking shaft, 6-mandrel, 7-first mounting seat, 8-second mounting seat and 9-push rod.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent laws within the scope of the claims of the present invention.

Example (b): as shown in fig. 1 and fig. 2, a pipe necking forming apparatus includes a first pressing element 3, a first pressing shaft 301 disposed on the first pressing element 3, a necking outer mold 1 connected to the first pressing shaft 301, and a necking inner mold core 2 fixedly disposed in the necking outer mold 1, wherein the first pressing element 3 is fixedly disposed, for example, fixedly mounted on a base or a worktable.

The necking forming equipment also comprises a top pipe sleeve 4 arranged at the rear end of the necking inner mold core 2 and a second jacking element 5 for driving the top pipe sleeve 4 to move back and forth relative to the necking inner mold core 2.

An axially through hole 302 is arranged in the first jacking shaft 301, the second jacking element 5 is fixed at the rear side of the first jacking element 3, the second jacking element 5 is provided with a second jacking shaft 501, the second jacking shaft 501 penetrates through the through hole 302 of the first jacking shaft 301, a push rod 9 is connected between the second jacking shaft 501 and the jacking pipe sleeve 4, and the push rod 9 and the jacking pipe sleeve 4 are driven to move back and forth relative to the necking inner mold core 2 through the second jacking element 5 and the second jacking shaft 501.

The number of the push rods 9 is 4-6, the push rods 9 are uniformly distributed along the circumference of the mandrel 6, and a connecting plate for connecting the push rods 9 is arranged at the end part of the second jacking shaft 501. One end of the push rod 9 is fixed on the connecting plate, and the other end is fixed at the rear end of the top pipe sleeve 4.

The outer diameter of the top pipe sleeve 4 is smaller than or equal to the minimum inner diameter of the necking outer die 1, and the inner diameter of the top pipe sleeve 4 is larger than or equal to the outer diameter of the rear end of the necking inner die core 2.

The rear end of the necking outer die 1 is provided with a flaring structure which is convenient for the end part of the top pipe sleeve 4 to enter the necking outer die 1.

Throat former is still including connecting the first mount pad 7 at first roof pressure axle 301 tip, connect dabber 6 between second roof pressure component 5 and throat inner mold core 2 and connect the second mount pad 8 between first mount pad 7 and the outer mould 1 of throat, 8 suits of second mount pad are in the outside of dabber 6, push rod 9 wears to establish on first mount pad 7 and establishes in the outside of dabber 6 separately, push pipe cover 4 suits are between second mount pad 8 and dabber 6. Wherein the mandrel 6 is fixedly connected to the end of the second jacking shaft 501, and the mandrel 6 and the second jacking shaft 501 are located on the same axis.

The first pressing element 3 and the second pressing element 5 can be air cylinders or hydraulic cylinders, preferably hydraulic cylinders in the present embodiment. The first jacking shaft 301 and the second jacking shaft 501 are piston rods corresponding to air cylinders or hydraulic cylinders.

During necking, the first jacking element 3 operates to drive the first jacking shaft 301 to move forwards, and the first jacking shaft 301 pushes the first mounting seat 7 to move forwards, so that the outer necking die 1 and the inner necking die 2 move forwards until the inner necking die 2 extends into the steel pipe and the outer necking die 1 sleeves the end of the steel pipe, and the necking action of the steel pipe is completed.

After the necking action is finished, when the second jacking element 5 runs, the second jacking shaft 501 moves forwards to push the push rod 9 to move, and the push rod 9 pushes the jacking pipe sleeve 4 to move towards the direction close to the necking inner mold core 2, so that the end part of the jacking pipe sleeve 4 is jacked against the end part of the steel pipe; then the second jacking shaft 501 moves backwards to reset, so as to drive the necking outer die 1 and the necking inner die core 2 to move backwards, and the steel pipe cannot move along with the necking outer die 1 and the necking inner die core 2 because the steel pipe is jacked by the pipe jacking sleeve 4, so that the steel pipe is separated from the necking outer die 1 and the necking inner die core 2.

Claims

1. The utility model provides a pipe fitting throat former, includes first top pressure component (3), sets up first top pressing shaft (301) on first top pressure component (3), connect in outer mould (1) of throat and fixed setting on first top pressing shaft (301) are in mold core (2) in the throat in outer mould (1), its characterized in that: the mould also comprises a top pipe sleeve (4) arranged at the rear end of the necking inner mould core (2) and a second top pressing element (5) for driving the top pipe sleeve (4) to move back and forth relative to the necking inner mould core (2).

2. A pipe necking forming apparatus according to claim 1, wherein: the necking forming equipment further comprises a first mounting seat (7) connected to the end of the first jacking shaft (301), a mandrel (6) connected between the second jacking element (5) and the necking inner mold core (2) and a second mounting seat (8) connected between the first mounting seat (7) and the necking outer mold (1), wherein the second mounting seat (8) is sleeved on the outer side of the mandrel (6), and the jacking pipe sleeve (4) is sleeved on the second mounting seat (8) and the mandrel (6).

3. A pipe necking forming apparatus according to claim 2, wherein: the first jacking shaft (301) is internally provided with an axially through hole (302), the second jacking element (5) is fixed at the rear side of the first jacking element (3), the second jacking element (5) is provided with a second jacking shaft (501), the second jacking shaft (501) penetrates through the through hole (302) of the first jacking shaft (301), a push rod (9) is connected between the second jacking shaft (501) and the jacking pipe sleeve (4), and the push rod (9) penetrates through the first mounting seat (7).

4. A pipe necking forming apparatus according to claim 3, wherein: the push rods (9) are uniformly distributed along the circumference of the mandrel (6), and a connecting plate used for connecting the push rods (9) is arranged at the end part of the second jacking shaft (501).

5. A pipe necking forming apparatus according to claim 1, wherein: the outer diameter of the top pipe sleeve (4) is smaller than or equal to the minimum inner diameter of the necking outer die (1), and the inner diameter of the top pipe sleeve (4) is larger than or equal to the outer diameter of the rear end of the necking inner die core (2).

6. A pipe necking forming apparatus according to claim 5, wherein: and the rear end of the necking outer die (1) is provided with a flaring structure which is convenient for the end part of the top pipe sleeve (4) to enter the necking outer die (1).