Internal expansion end forming device

Abstract

The utility model relates to the technical field of pipeline end forming, in particular to an internal expansion end forming device which is simple in structure, shortens the manufacturing period and reduces the manufacturing cost. Comprising a fixing ring, the top of the fixing ring is fixedly connected with an end forming blooming rod, the end forming blooming rod comprises a fixing part fixedly connected with the fixing ring and a deformation part fixedly connected with the fixing part, a plurality of notches are formed in the deformation part at equal intervals, and the notches extend downwards from the top end of the deformation part to the middle of the deformation part; an arc-shaped protrusion is arranged on the upper half portion of the outer wall of the deformation part, a first conical surface is arranged on the inner wall of the deformation part, an expansion core is coaxially connected into the fixing ring in a sliding mode, and a second conical surface matched with the first conical surface is arranged at the top end of the expansion core.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline end forming, in particular to an internal expansion end forming device. Background Art

[0002] As shown in the figure, the tube parts need to be expanded at the end of the tube. At this time, an end forming machine is needed. The existing end forming method is to use an end forming machine for processing. The disadvantage of the existing end forming machine is that the mold structure is complex, resulting in a long mold manufacturing cycle and increased costs. Utility Model Content

[0003] (1) Technical problems solved

[0004] In view of the deficiencies of the prior art, the utility model provides an inward expansion end forming device with a simple structure, shortened manufacturing cycle and reduced manufacturing cost.

[0005] (2) Technical solution

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an internal expansion end forming device, comprising a fixed ring, the top of the fixed ring is fixedly connected to an end forming flower stick, the end forming flower stick comprises a fixed part fixedly connected to the fixed ring and a deformation part fixedly connected to the fixed part, the deformation part is equidistantly provided with a plurality of notches, the notches extend downward from the top of the deformation part to the middle of the deformation part; the upper half of the outer wall of the deformation part has an arc-shaped protrusion, the inner wall of the deformation part is provided with a conical surface one, an expansion core is coaxially slidably connected to the fixed ring, and the top of the expansion core is a conical surface two that cooperates with the conical surface one.

[0007] Furthermore, the present invention is improved to include a bottom plate, which is provided with a through hole 1, the fixing ring is fixed to the bottom of the through hole 1, and the top end of the end-molded flower stick passes through the bottom plate from the through hole 1.

[0008] Furthermore, the utility model is improved in that a through hole 2 is opened on the top of the bottom plate, the through hole 2 is connected to the through hole 1, the through hole 1 and the through hole 2 form a T shape, a protective block is fixed at the through hole 2, a through hole is provided in the middle of the protective block, and the deformation part is in the through hole.

[0009] Furthermore, the present invention is improved in that a threaded tube is fixed to the bottom of the fixing ring, the threaded tube is threadedly connected to a top ring, and the bottom end of the expansion core extends to the outside of the top ring.

[0010] Furthermore, the present invention is improved in that the threaded pipe is threadedly connected with a nut.

[0011] Furthermore, the present invention is improved in that the diameter of the fixing portion is larger than the diameter of the deformation portion.

[0012] (3) Beneficial effects

[0013] Compared with the prior art, the utility model provides an internal expansion end forming device with the following beneficial effects: when in use, the bottom end of the expansion core is installed on an external linear power mechanism, and then the deformation part is manually inserted into the interior of the tube, and then the expansion core is operated to move upward. As the expansion core goes deeper, the conical surface 2 at its top begins to contact and squeeze the conical surface 1 inside the deformation part. Due to the inclination effect between the conical surfaces and the elastic properties of the deformation part itself, the deformation part will be stretched open as the expansion core continues to advance, and the arc-shaped protrusion on it will also exert outward pressure on the inside of the tube, thereby realizing the expansion forming of the tube end. After forming, the expansion core is moved downward and the deformation part returns to its original state. Compared with the prior art, the device has a simple structure, shortens the mold manufacturing cycle, and reduces manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 It is a cross-sectional view of the rod connector, top ring, nut, retaining ring, expansion core, end-molded flower rod and threaded tube;

[0016] Markings in the accompanying drawings: 1. Rod connector; 2. Top ring; 3. Nut; 4. Fixing ring; 5. Base plate; 6. Protective block; 7. Expanding core; 8. End-molded flower rod; 9. Threaded tube. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] See also Figure 1-Figure 2 The utility model is an internal expansion end forming device, including a fixing ring 4, the top of the fixing ring 4 is fixedly connected to an end forming flower stick 8, the end forming flower stick 8 includes a fixing portion fixedly connected to the fixing ring 4 and a deformation portion fixedly connected to the fixing portion, the deformation portion is equidistantly provided with a plurality of notches, the notches extending downward from the top of the deformation portion to the middle of the deformation portion; the upper half of the outer wall of the deformation portion has an arc-shaped protrusion, such as Figure 2As shown, the inner wall of the deformation part is provided with a conical surface 1, and an expansion core 7 is coaxially slidably connected in the fixed ring 4. The top of the expansion core 7 is a conical surface 2 that matches the conical surface 1. The deformation part is made of elastic material. When the conical surface 2 and the conical surface 1 intersect, the deformation part is driven to undergo elastic deformation. The arc-shaped protrusion expands the tube end. The bottom end of the expansion core 7 is connected to the output end of the external linear power mechanism through the rod connector 1.

[0019] In this embodiment, when in use, the bottom end of the expanding core 7 is mounted on an external linear power mechanism, and then the deforming portion is manually inserted into the interior of the tube. The expanding core 7 is then operated to move upward. As the expanding core 7 goes deeper, the second conical surface at its top begins to contact and squeeze the first conical surface inside the deforming portion. Due to the inclination between the conical surfaces and the elastic properties of the deforming portion itself, the deforming portion will be stretched open as the expanding core 7 continues to advance. At the same time, the arc-shaped protrusion thereon will also exert outward pressure on the interior of the tube, thereby realizing expansion forming of the tube end. After forming, the expanding core 7 is moved downward and the deformed portion returns to its original shape.

[0020] Furthermore, the utility model is improved and further includes a bottom plate 5, the bottom plate 5 is provided with a through hole 1, the fixing ring 4 is fixed to the bottom of the through hole 1, and the top of the end-molded flower rod 8 passes through the bottom plate 5 from the through hole 1; a through hole 2 is provided on the top of the bottom plate 5, the through hole 2 is connected to the through hole 1, the through hole 1 and the through hole 2 form a T-shape, a protective block 6 is fixed at the through hole 2, a through hole is provided in the middle of the protective block 6, the deformed portion is in the through hole, and the deformed portion is coaxial with the through hole;

[0021] In this embodiment, when in use, the tube is inserted into the through hole of the protective block 6, which can limit the position of the tube and improve the convenience of use.

[0022] Furthermore, the utility model is improved in that a threaded tube 9 is fixed to the bottom of the fixing ring 4, and the threaded tube 9 is threadedly connected to the top ring 2. The bottom end of the expanding core 7 extends to the outside of the top ring 2. By rotating the top ring 2, the relative position of the bottom end of the top ring 2 and the bottom end of the expanding core 7 can be adjusted. When the output end of the external power mechanism contacts the bottom end of the top ring 2, the expanding core 7 reaches the limit position, and the deformation degree of the deformation part can be adjusted.

[0023] Furthermore, the present invention is improved in that the threaded tube 9 is threadedly connected with a nut 3. After the top ring 2 is adjusted, the nut 3 is rotated to make the nut 3 contact with the top ring 2 to prevent the position of the top ring 2 from changing.

[0024] Furthermore, the present invention is improved in that the diameter of the fixing portion is larger than the diameter of the deforming portion. When the deforming portion extends into the tube, the end of the tube contacts the top of the fixing portion, thereby positioning and supporting the tube and improving the processing quality.

[0025] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An inward expansion end forming device, characterized in that: The invention comprises a fixing ring (4), the top of which is fixedly connected to an end-molded flower stick (8), the end-molded flower stick (8) comprising a fixing portion fixedly connected to the fixing ring (4) and a deformation portion fixedly connected to the fixing portion, the deformation portion being provided with a plurality of notches at equal intervals, the notches extending downward from the top of the deformation portion to the middle of the deformation portion; the upper half of the outer wall of the deformation portion is provided with an arc-shaped protrusion, the inner wall of the deformation portion is provided with a conical surface 1, an expansion core (7) is coaxially slidably connected inside the fixing ring (4), and the top of the expansion core (7) is a conical surface 2 that matches the conical surface 1.

2. The inward expansion end forming device according to claim 1, characterized in that: It also includes a bottom plate (5), the bottom plate (5) is provided with a through hole 1, the fixing ring (4) is fixed at the bottom of the through hole 1, and the top end of the end-molded flower rod (8) passes through the bottom plate (5) from the through hole 1.

3. The inward expansion end forming device according to claim 2, characterized in that: A through hole 2 is provided on the top of the bottom plate (5), the through hole 2 is connected to the through hole 1, the through hole 1 and the through hole 2 form a T shape, a protection block (6) is fixed at the through hole 2, a through hole is provided in the middle of the protection block (6), and the deformation portion is located in the through hole.

4. The inward expansion end forming device according to claim 3, characterized in that: A threaded tube (9) is fixed to the bottom of the fixing ring (4), the threaded tube (9) is threadedly connected to the top ring (2), and the bottom end of the expansion core (7) extends to the outside of the top ring (2).

5. The inward expansion end forming device according to claim 4, characterized in that: The threaded pipe (9) is threadedly connected with a nut (3).

6. The inward expansion end forming device according to claim 1, characterized in that: The diameter of the fixing portion is larger than the diameter of the deformation portion.

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