CN220805081U - Extrusion forming device for 90-degree elbow of thin-wall stainless steel pipe - Google Patents

Abstract

The utility model discloses a 90-degree elbow extrusion molding device of a thin-wall stainless steel pipe, which comprises an upper die and a lower die, wherein an upper die cavity is arranged at the bottom of the upper die, a lower die cavity is arranged at the top of the lower die, the upper die cavity and the lower die cavity jointly form a molding cavity, two sides of the molding cavity are respectively provided with a flaring hold-down mechanism, the flaring hold-down mechanism comprises a clamp and a combined collar, the outer diameter of the clamp is decreased from inside to outside, the outer side wall of the clamp forms a first inclined plane, the combined collar comprises an outer collar and a bevel expansion core, a second inclined plane matched with the first inclined plane is arranged at the inner side of the outer collar, a third inclined plane is arranged at the inner wall of the clamp, the bevel expansion core comprises a ring body and a core body, and a fourth inclined plane matched with the third inclined plane is arranged at the outer side of the core body.

Description

Extrusion forming device for 90-degree elbow of thin-wall stainless steel pipe

Technical Field

The utility model relates to the field of stainless steel tube processing, in particular to a 90-degree elbow extrusion forming device for a thin-wall stainless steel tube.

Background

The thin-wall stainless steel pipe is widely applied, when parts are machined, bending operation is often needed, when 90-degree or 45-degree stainless steel pipes are bent, a pipe bending machine is generally adopted for bending, but a traditional pipe bending machine can only bend thick-wall stainless steel pipes, when the thin-wall stainless steel pipes are bent, the defects of wrinkling, collapse, cracking and the like are easily generated after bending due to insufficient rigidity of the thin-wall stainless steel pipes.

Disclosure of utility model

The utility model aims to: the utility model aims to solve the technical problem of providing a 90-degree elbow extrusion molding device for a thin-wall stainless steel pipe, aiming at the defects in the prior art.

In order to solve the technical problems, the utility model discloses a 90-degree elbow extrusion molding device for a thin-wall stainless steel pipe, which comprises an upper die and a lower die, wherein an upper die cavity is arranged at the bottom of the upper die, a lower die cavity is arranged at the top of the lower die, the upper die cavity and the lower die cavity jointly form a molding cavity, two sides of the molding cavity are respectively provided with a flaring compressing mechanism, the flaring compressing mechanism comprises a clamp and a combined collar, the outer diameter of the clamp decreases from inside to outside, the outer side wall of the clamp forms a first inclined plane, the combined collar comprises an outer collar and an inclined opening expanding core, a second inclined plane matched with the first inclined plane is arranged at the inner side of the outer collar, a third inclined plane is arranged at the inner wall of the clamp, the inclined opening expanding core comprises a ring body and a core body, and a fourth inclined plane matched with the third inclined plane is arranged at the outer side of the core body.

According to the utility model, the outer ring of the outer sleeve is provided with a spring buffer hole and a screw hole, the spring buffer hole is internally provided with a buffer spring, the outer ring of the ring body of the bevel-mouth expansion core is provided with a stepped hole, a bolt passes through the stepped hole and the buffer spring to be fastened to the screw hole, one end of the buffer spring is abutted against the inner wall of the spring buffer hole, and the other end of the buffer spring is abutted against the bevel-mouth expansion core.

In the utility model, a group of guide posts are respectively arranged at two sides of the bottom of the upper die, and a group of guide grooves are respectively arranged at two sides of the top of the lower die.

In the utility model, the clamp is an open-close clamp, and the lower side of the clamp is fixed on the lower die.

In the utility model, the upper die is fixed on an upper die backing plate, and the lower die is fixed on a lower die backing plate.

In the utility model, the first inclined plane and the second inclined plane have the same gradient.

In the utility model, the gradient of the third inclined plane is the same as that of the fourth inclined plane.

The beneficial effects are that: the utility model can form a plurality of 90-degree elbows at one time, saves trouble and labor and has high efficiency. Compared with the expansion forming process, the forming process provided by the utility model has the advantages that the thickness of the formed thin-wall stainless steel tube is uniform, and the performance is stable. The utility model can also form a plurality of elbows at one time by increasing the length of the cavity.

Drawings

The foregoing and/or other advantages of the utility model will become more apparent from the following detailed description of the utility model when taken in conjunction with the accompanying drawings and detailed description.

FIG. 1 is a schematic overall construction of a non-operating state;

FIG. 2 is a schematic view of the overall structure in an operating state;

FIG. 3 is a cross-sectional view of the non-operational state;

FIG. 4 is an enlarged view of a portion of FIG. 3;

Fig. 5 is a sectional view of the working state.

Reference numerals in the drawings: 1. the upper die, 2, the lower die, 3, the clamp, 4, the outer sleeve, 5, the bevel opening expansion core, 6, the ring body, 7, the core, 8, the spring buffer hole, 9, the screw hole, 10, the buffer spring, 11, the stepped hole, 12, the bolt, 13, the guide post, 14, the guide slot, 15, the upper die backing plate, 16 and the lower die backing plate.

Detailed Description

Examples:

As shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, this embodiment provides a 90-degree elbow extrusion molding device of thin wall stainless steel pipe, including last mould 1 and lower mould 2, it is equipped with die cavity 1a to go up mould 1 bottom, lower mould 2 top is equipped with die cavity 2a down, goes up die cavity and forms the die cavity jointly down, the die cavity both sides are equipped with a flaring hold-down mechanism respectively, flaring hold-down mechanism includes clamp 3 and combination lantern ring, the external diameter of clamp 3 is from inside to outside progressively decrease, clamp 3 lateral wall forms first inclined plane 3a, the combination lantern ring includes outer lantern ring 4 and bevel mouth core 5 that rises, outer lantern ring 4 inboard is equipped with the second inclined plane 4a with first inclined plane adaptation, clamp 3's inner wall is equipped with third inclined plane 3b, bevel mouth core that rises includes ring body 6 and core 7, the core outside is equipped with the fourth inclined plane 7a with third inclined plane adaptation.

The outer ring of the outer lantern ring 4 is provided with a spring buffer hole 8 and a screw hole 9, a buffer spring 10 is arranged in the spring buffer hole, the outer ring of the bevel-mouth expansion core is provided with a stepped hole 11, a bolt 12 passes through the stepped hole, the buffer spring 10 is fastened to the screw hole, one end of the buffer spring 10 is abutted against the inner wall of the spring buffer hole 8, and the other end is abutted against the bevel-mouth expansion core 5. The outer sleeve ring 4 and the bevel-mouth expansion core 5 can stretch and retract to play a role in buffering.

The two sides of the bottom of the upper die are respectively provided with a group of guide posts 13, and the two sides of the top of the lower die are respectively provided with a group of guide grooves 14. The clamp is open-close type clamp, and the clamp downside is fixed at the lower mould. The upper die is fixed on an upper die pad 15, and the lower die is fixed on a lower die pad 16. The first inclined surface 3a has the same gradient as the second inclined surface 4 a. The third slope 3b has the same gradient as the fourth slope 7 a.

When the embodiment is used, the steps are as follows:

Step 1: taking a thin-wall stainless steel pipe blank, filling paraffin into the pipe blank, and cooling;

Step 2: placing the tube blank on a lower die, and fastening two ends of the tube blank through clamps;

step 3: the hydraulic press pushes the bevel-mouth expansion core to be sleeved into the pipe blank, so that the pipe blank is tightly pressed and attached between the third inclined plane and the fourth inclined plane, and a flaring is formed and fixed;

step 4: the hydraulic press drives the cover plate to abut against and block the two sides of the tube blank;

step 5: and closing the upper die and the lower die, and extruding and shaping the pipe blank.

The clamp, the outer collar 4 and the bevel connection expansion core 5 of the embodiment are arranged concentrically.

The utility model provides a device and a method for extrusion forming of a 90-degree elbow of a thin-wall stainless steel pipe, and the method for extrusion forming of the 90-degree elbow of the thin-wall stainless steel pipe, and the method for implementation of the technical scheme are numerous, the above description is only a preferred embodiment of the utility model, and it should be pointed out that, to those skilled in the art, several improvements and modifications can be made without departing from the principle of the utility model, and the improvements and modifications should be regarded as the protection scope of the utility model. The components not explicitly described in this embodiment can be implemented by using the prior art.

Claims (7)

1. The utility model provides a 90 elbow extrusion forming device of thin wall stainless steel pipe, its characterized in that, including last mould (1) and lower mould (2), it is equipped with die cavity (1 a) to go up mould (1) bottom, lower mould (2) top is equipped with die cavity (2 a) down, goes up die cavity and die cavity down and forms the die cavity jointly, the die cavity both sides are equipped with a flaring hold-down mechanism respectively, flaring hold-down mechanism includes clamp (3) and combination lantern ring, the external diameter of clamp (3) is from inside to outside degressive, and clamp (3) lateral wall forms first inclined plane (3 a), the combination lantern ring includes outer lantern ring (4) and bevel connection core (5) that rises, the inner wall of outer lantern ring (4) is equipped with second inclined plane (4 a) with first inclined plane adaptation, and the bevel connection core that rises includes ring body (6) and core (7), and the core outside is equipped with fourth inclined plane (7 a) with third inclined plane adaptation.

2. The extrusion forming device for the 90-degree elbow of the thin-wall stainless steel pipe according to claim 1, wherein a spring buffer hole (8) and a screw hole (9) are formed in the outer ring of the outer sleeve ring (4), a buffer spring (10) is arranged in the spring buffer hole, a stepped hole (11) is formed in the outer ring of the ring body of the bevel-mouth expansion core, a bolt (12) penetrates through the stepped hole and the buffer spring (10) to be fastened to the screw hole, one end of the buffer spring (10) is abutted against the inner wall of the spring buffer hole (8), and the other end of the buffer spring is abutted against the bevel-mouth expansion core (5).

3. The extrusion molding device for the 90-degree elbow of the thin-wall stainless steel tube according to claim 1, wherein a group of guide posts (13) are respectively arranged on two sides of the bottom of the upper die, and a group of guide grooves (14) are respectively arranged on two sides of the top of the lower die.

4. The extrusion apparatus for 90 ° bends of thin-walled stainless steel tubing according to claim 1, wherein said clamp is an open-close clamp, and the underside of said clamp is fixed to a lower die.

5. A 90 ° elbow extrusion apparatus for thin walled stainless steel tubing as described in claim 1 wherein said upper die is secured to an upper die backing plate (15) and said lower die is secured to a lower die backing plate (16).

6. A 90 ° elbow extrusion apparatus for thin walled stainless steel tubing as described in claim 1 wherein said first ramp (3 a) is of the same grade as said second ramp (4 a).

7. A 90 ° elbow extrusion apparatus for thin walled stainless steel tubing as described in claim 1 wherein said third ramp (3 b) is of the same grade as said fourth ramp (7 a).