Die for riveting outer diameter deformation of thin-walled pipe

Abstract

The utility model provides a thin-walled tube riveting outer diameter deformation mould, which relates to the technical field of moulds, and comprises an upper mould, a lower mould and a middle mould, a movable groove is arranged in the upper mould, two convex concave moulds communicated with the movable groove are arranged on the upper mould, an interlayer is arranged between the lower mould and the upper mould, a convex mould is arranged on the lower mould, and the middle mould is arranged on the lower mould. The male die is located in the female die, an annular groove communicated with the interlayer is formed by the outer wall of the male die and the inner wall of the female die, the middle die is installed in the movable groove in a sliding mode, a pressing column is installed on the middle die, and the space of the annular groove is reduced through extrusion of the pressing column. The thin-walled tube on an object is formed through press fit between the upper die and the lower die, two processes of welding and polishing of press fit are avoided, the position of the thin-walled tube during press fit can accurately correspond to the installation position, the situation that the positions of the thin-walled tube are not uniform due to welding, and the positions are not corresponding is avoided, and the production efficiency is improved. Meanwhile, the thin-walled pipe can be flattened through the die, and the flattening effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a mold for riveting outer diameter deformation of a thin-walled tube. Background Art

[0002] The thin-walled tube is a tubular column protruding from the plate. The plate has a hole of the same size as the thin-walled tube. The thin-walled tube is connected to the plate and can guide when installing bolts or rivets. When facing thinner plates, it can cope with lateral forces and prevent the bolts or rivets from tilting on the plate.

[0003] The installation method of thin-walled pipes is carried out by welding. During the welding process, the holes in the thin wall need to be aligned and positioned before welding. The whole process is time-consuming and labor-intensive, causing inconvenience. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a thin-walled tube riveting outer diameter deformation die to press a plate into a thin-walled tube, thereby improving the efficiency of thin-walled tube formation.

[0005] Based on the technical problems existing in the background technology, the utility model proposes a mold for riveting outer diameter deformation of a thin-walled tube, comprising an upper mold, a lower mold and a middle mold, wherein a movable groove is opened in the upper mold, and the upper mold is equipped with two concave molds which are connected to the movable groove and protrude, an interlayer is provided between the lower mold and the upper mold, and a punch is provided on the lower mold, the punch is located in the concave mold, and the outer wall of the punch and the inner wall of the concave mold form an annular groove connected to the interlayer, the middle mold is slidably installed in the movable groove, and a pressing column is installed on the middle mold, and the pressing column squeezes and reduces the space of the annular groove.

[0006] Preferably, the upper mold comprises a first fixing plate, a gasket, an upper pad and a third fixing plate, the first fixing plate and the upper pad clamp the gasket therebetween, the third fixing plate is installed below the upper pad, and the concave mold is installed on the upper mold.

[0007] Preferably, the gasket is annular, and a movable groove is formed between the gasket and the first fixed plate and the upper pad. A hole groove connected to the movable groove is opened on the upper pad. An installation groove is provided on the third fixed plate. The die is installed on the installation groove and the die is connected to the hole groove.

[0008] Preferably, the middle mold includes a beating plate and a pressing column, the pressing column is located in the hole groove and the die and slides, the beating plate is located in the movable groove and can drive the pressing column to slide in the hole groove and the die, and the first fixed plate is also equipped with a driving mechanism that drives the beating plate to slide in the movable groove.

[0009] Preferably, the lower mold includes a stripping plate, a second fixed plate, a lower pad and a lower template, the lower pad is mounted on the lower template, the second fixed plate is mounted on the lower pad, the stripping plate is mounted on the second fixed plate and fixes the punch with the second fixed plate.

[0010] Preferably, the male die protrudes from the upper surface of the stripping plate and is located in the sliding groove of the female die.

[0011] Preferably, an extrusion ring is installed at the extrusion end of the pressing column, the thickness of the extrusion ring is equal to the distance between the male die and the female die, and the extrusion ring is located between the male die and the female die to slide.

[0012] Preferably, the unloading plate and the third fixing plate are connected via guide pillars, and the third fixing plate can slide relative to the unloading plate via the guide pillars.

[0013] Compared with the prior art, the thin-walled tube riveting outer diameter deformation die proposed by the utility model adopts the above technical solution to achieve the following technical effects:

[0014] The utility model forms a thin-walled tube on an object by pressing an upper mold and a lower mold, avoiding two processes of pressing, welding and polishing. The position of the thin-walled tube during pressing can accurately correspond to the installation position, avoiding the situation where the position of the thin-walled tube is not uniform due to welding and resulting in position mismatch. At the same time, the thin-walled tube in the utility model can be flattened by the mold to achieve a flattening effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the fitting of the upper mold and the lower mold of the utility model;

[0016] Figure 2 It is an enlarged schematic diagram of area a of the utility model;

[0017] Figure 3 It is a schematic diagram of the pressing of the upper mold and the lower mold of the utility model;

[0018] Figure 4 This is an enlarged schematic diagram of area b of the utility model;

[0019] Figure 5 It is a schematic diagram of the pressing of the middle mold and the lower mold of the utility model;

[0020] Figure 6 It is an enlarged schematic diagram of area c of the utility model;

[0021] Figure 7 This is a schematic diagram of the thin-walled tube structure of the utility model.

[0022] In the figure: 1. upper mold; 2. lower mold; 3. middle mold; 11. movable groove; 4. concave mold; 5. punch; 6. pressing column; 12. first fixed plate; 13. gasket; 14. upper pad; 15. third fixed plate; 141. hole groove; 151. mounting groove; 7. punching plate; 8. driving mechanism; 21. unloading plate; 22. second fixed plate; 23. lower pad; 24. lower template; 61. extrusion ring; 9. guide column; 10. thin-walled tube. DETAILED DESCRIPTION

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] Example

[0026] Please refer to Figure 1-7The utility model proposes a thin-walled tube riveting outer diameter deformation mold, including an upper mold 1, a lower mold 2 and a middle mold 3. The upper mold 1 is provided with a movable groove 11, and the upper mold 1 is provided with two concave molds 4 connected to the movable groove 11 and protruding. There is an interlayer between the lower mold 2 and the upper mold 1, and a punch 5 is provided on the lower mold 2. The punch 5 is located in the concave mold 4, and the outer wall of the punch 5 and the inner wall of the concave mold 4 form an annular groove connected to the interlayer. The middle mold 3 is slidably installed in the movable groove 11, and a pressing column 6 is installed on the middle mold 3. The pressing column 6 squeezes and reduces the space of the annular groove. When the upper mold 1 and the lower mold 2 are pressed together, the distance between the punch 5 and the die 4 will clamp the object. In the process of continuous pressing, the punch 5 will squeeze the object to bend into the die 4, and make the bent part of the object in the gap after the punch 5 and the die 4 are inserted. At this time, a thin-walled tube 10 will be formed on the object. The thin-walled tube 10 is now sleeved on the punch 5, and the end of the thin-walled tube 10 will have a sharp angle. After pressing down, the pressing column 6 will also be located between the punch 5 and the die 4, and compact the end of the thin-walled tube 10, so that the sharp part of the thin-walled tube 10 becomes flat; at the same time, when the upper mold is separated from the lower mold, the thin-walled tube 10 can be squeezed out of the upper mold 1 by pushing the pressing column 6.

[0027] In a specific implementation manner, refer to Figure 1 , Figure 3 , Figure 5 The upper mold 1 includes a first fixing plate 12, a washer 13, an upper pad 14 and a third fixing plate 15. The first fixing plate 12 and the upper pad 14 clamp the washer 13 between them. The third fixing plate 15 is installed below the upper pad 14. The die 4 is installed on the upper mold 1. All parts of the upper mold 1 are fixed by bolts. The first fixing plate 12 and the third fixing plate 15 provide compaction and fixation for the entire upper mold. The pad and the washer 13 form a movable groove 11 in the middle for the middle mold 3 to slide.

[0028] In a specific implementation manner, refer to Figure 1 , Figure 3 , Figure 5 The gasket 13 is annular, and a movable groove 11 is formed between the gasket 13 and the first fixed plate 12 and the upper pad 14. A hole groove 141 communicating with the movable groove 11 is provided on the upper pad 14, and a mounting groove 151 is provided on the third fixed plate 15. The die 4 is installed on the mounting groove 151 and the die 4 is communicated with the hole groove 141. The gasket 13 is annular, and has a circular groove in the middle. The two planes of the gasket 13 are sealed by the first fixed plate 12 and the upper pad 14. The hole groove 141 on the upper pad 14 runs through the entire upper pad 14, that is, it can be communicated with the sealing groove. At the same time, the die 4 also runs through the entire third fixed plate 15. The groove in the die 4 is connected with the hole groove 141 to form a slide groove communicating with the movable groove 11, and the pressing column 6 can slide in the maintenance slide groove.

[0029] In a specific implementation manner, refer to Figure 1 , Figure 3 , Figure 5 The middle mold 3 includes a plate 7 and a pressing column 6. The pressing column 6 is located in the hole groove 141 and slides in the die 4. The plate 7 is located in the movable groove 11 and can drive the pressing column 6 to slide in the hole groove 141 and the die 4. The first fixed plate 12 is also equipped with a driving mechanism 8 that drives the plate 7 to slide in the movable groove 11. The plate 7 is disc-shaped, and its radius is equal to the radius of the circular groove of the gasket 13. In the utility model, two pressing columns 6 are provided, and the plate 7 can push the two pressing columns 6 to slide.

[0030] In a specific implementation manner, refer to Figure 1 , Figure 3 , Figure 5 The lower mold 2 includes a stripper plate 21, a second fixed plate 22, a lower pad 23 and a lower template 24. The lower pad 23 is installed on the lower template 24, the second fixed plate 22 is installed on the lower pad 23, and the stripper plate 21 is installed on the second fixed plate 22 and fixes the punch 5 with the second fixed plate 22.

[0031] In a specific implementation manner, refer to Figure 1 , Figure 3 , Figure 5 The punch 5 protrudes from the upper surface of the stripper plate 21 and is located in the slide groove of the die 4.

[0032] In a specific implementation manner, refer to Figure 1 , Figure 3 , Figure 5 An extrusion ring 61 is installed at the extrusion end of the pressing column 6. The thickness of the extrusion ring 61 is equal to the distance between the punch 5 and the die 4, and the extrusion ring 61 is located between the punch 5 and the die 4 and slides. The extrusion ring 61 is fixed at the end of the extrusion ring 61 to reduce the gap between the punch 5 and the die 4, so as to extrude the thin-walled tube 10 and make the end of the thin-walled tube 10 smooth.

[0033] In a specific implementation manner, refer to Figure 1 , Figure 3 , Figure 5 The stripper plate 21 and the third fixed plate 15 are connected by guide posts 9, and the third fixed plate 15 can slide relative to the stripper plate 21 through the guide posts 9. The guide posts 9 are used to connect the two molds and allow the upper mold 1 to slide relative to the lower mold 2, and the two ends of the guide posts 9 are respectively mounted on the stripper plate 21 and the third fixed plate 15.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A thin-walled tube riveting outer diameter deformation die, characterized in that: The invention comprises an upper mold (1), a lower mold (2) and a middle mold (3), wherein a movable groove (11) is provided in the upper mold (1), and two concave molds (4) are installed on the upper mold (1) and are connected to the movable groove (11) and protrude therefrom, and an interlayer is provided between the lower mold (2) and the upper mold (1), and a convex mold (5) is provided on the lower mold (2), and the convex mold (5) is located in the concave mold (4), and the outer wall of the convex mold (5) and the inner wall of the concave mold (4) form an annular groove connected to the interlayer, and the middle mold (3) is slidably installed in the movable groove (11), and a pressing column (6) is installed on the middle mold (3), and the pressing column (6) squeezes and reduces the space of the annular groove.

2. The thin-walled tube riveting outer diameter deformation die according to claim 1, characterized in that: The upper mold (1) comprises a first fixing plate (12), a gasket (13), an upper pad (14) and a third fixing plate (15); the first fixing plate (12) and the upper pad (14) clamp the gasket (13) therebetween; the third fixing plate (15) is installed below the upper pad (14); and the concave mold (4) is installed on the upper mold (1).

3. The thin-walled tube riveting outer diameter deformation die according to claim 2, characterized in that: The washer (13) is annular, and a movable groove (11) is formed between the washer (13), the first fixed plate (12), and the upper pad (14); a hole groove (141) communicating with the movable groove (11) is provided on the upper pad (14); a mounting groove (151) is provided on the third fixed plate (15); the die (4) is mounted on the mounting groove (151), and the die (4) is communicated with the hole groove (141).

4. The thin-walled tube riveting outer diameter deformation die according to claim 3, characterized in that: The middle mold (3) comprises a beating plate (7) and a pressing column (6); the pressing column (6) is located in the hole groove (141) and slides in the die (4); the beating plate (7) is located in the movable groove (11) and can drive the pressing column (6) to slide in the hole groove (141) and the die (4); and a driving mechanism (8) for driving the beating plate (7) to slide in the movable groove (11) is also installed on the first fixed plate (12).

5. The thin-walled tube riveting outer diameter deformation die according to claim 1, characterized in that: The lower mold (2) comprises a stripper plate (21), a second fixed plate (22), a lower pad (23) and a lower mold plate (24); the lower pad (23) is mounted on the lower mold plate (24); the second fixed plate (22) is mounted on the lower pad (23); the stripper plate (21) is mounted on the second fixed plate (22) and fixes the punch (5) together with the second fixed plate (22).

6. The thin-walled tube riveting outer diameter deformation die according to claim 1, characterized in that: The male die (5) protrudes from the upper surface of the stripping plate (21) and is located in the slide groove of the female die (4).

7. The thin-walled tube riveting outer diameter deformation die according to claim 1, characterized in that: An extrusion ring (61) is installed at the extrusion end of the pressing column (6), the thickness of the extrusion ring (61) is equal to the distance between the male die (5) and the female die (4), and the extrusion ring (61) is located between the male die (5) and the female die (4) for sliding.

8. The thin-walled tube riveting outer diameter deformation die according to claim 5, characterized in that: The unloading plate (21) and the third fixing plate (15) are connected via a guide column (9), and the third fixing plate (15) can slide relative to the unloading plate (21) via the guide column (9).

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