Pipe expanding die for hollow cylinder of back plate

Abstract

The utility model discloses an expansion tube mould for the hollow cylinder of backboard, including base and drive device, the base is provided with the guide hole that is provided with the axial setting, the guide hole is provided with a plurality of swellable seat, the swellable seat encloses the cylindrical structure, when a plurality of swellable seat encloses the cylinder, the rear end of swellable seat is provided with hollow drive hole, and the drive device is provided with the drive hole. The driving device is arranged on the rear portion of the base, the driving device is used for driving the expanding seat to move between the outward expanding positions, the driving device comprises a driving rod matched with the driving hole, the driving rod slides in the axis direction, and an inclined driving guide face is arranged at the end, making contact with the driving hole, of the driving rod. When the inclined driving guide faces stretch into the driving holes, the multiple expansion seats slide outwards in an expanding mode through the driving guide faces, then the hollow cylinders placed on the peripheries of the front ends of the expansion seats apply pressure outwards, deformation of the hollow cylinders is achieved, and the machining steps are simple and convenient.

Description

Technical Field

[0001] The utility model relates to the field of back plate processing, in particular to a tube expansion die for a hollow column of a back plate. Background Art

[0002] In the back panel processing, there are usually rivet columns or hollow cylinder structures to achieve the fixation or installation of corresponding accessories. This type of hollow columnar structure is generally formed by stamping to form a predetermined hole position, but in actual processing, due to errors, deformations and specification changes, it is often necessary to adjust and expand the inner wall of the hollow column to meet the predetermined process requirements. The existing method is generally to use a milling cutter for cutting (i.e. thinning), but there are also some problems with wall thickness and deformation that cannot be achieved by a milling cutter, affecting the stability and efficiency of production. Utility Model Content

[0003] The main purpose of the utility model is to propose an expansion die for a hollow column of a back plate, aiming to design a small-sized expansion die, thereby realizing the shaping or expansion of the hollow column, reducing errors or losses caused by processing, and avoiding material waste.

[0004] To achieve the above-mentioned purpose, the utility model provides a tube expansion mold for a hollow cylinder of a back plate, comprising:

[0005] A base, wherein the base is provided with an axially arranged guide hole, wherein the guide hole is provided with a plurality of expansion seats radially slidably installed along the guide hole, wherein the expansion seats are surrounded by a cylindrical structure, wherein the plurality of expansion seats can be switched between a position where the plurality of expansion seats are surrounded by a cylindrical structure and a position where the plurality of expansion seats are expanded outwardly, and when the plurality of expansion seats are surrounded by a cylindrical structure, a hollow driving hole is provided at the rear end of the expansion seat;

[0006] A driving device is arranged at the rear position of the base, and is used to drive the expansion seat to move between positions of outward expansion. The driving device includes a driving rod that cooperates with the driving hole, and the driving rod slides along the axial direction. The end of the driving rod that contacts the driving hole is provided with an inclined driving guide surface.

[0007] In the actual design, through the cooperation of the driving rod and the driving hole, when the inclined driving guide surface extends into the driving hole, the driving guide surface causes the multiple expansion seats to slide outward to expand their diameters, thereby causing the hollow cylinder placed on the outer periphery of the front end of the expansion seat to apply pressure outward, thereby realizing the deformation of the hollow cylinder. The processing steps are simple and convenient, and can be used for the shaping of the hollow cylinder, and can also be used for the expansion of the inner hole of the hollow cylinder, which effectively improves the processing applicability.

[0008] At the same time, by setting the predetermined stroke of the driving rod and the inclination angle of the driving guide surface, the processing size of the expansion seat can also be adjusted by the stroke, thereby improving the processing applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a half-section schematic diagram of the utility model;

[0010] Figure 2 This is a cross-sectional view of the utility model;

[0011] Figure 3 It is a three-dimensional schematic diagram of the utility model;

[0012] Figure 4 This is a schematic diagram after multiple hidden parts are expanded.

[0013] In the figure, 1 is a base, 10 is a guide hole, 2 is an expansion seat, 20 is a drive hole, 21 is a guide groove, 22 is a guide block, 3 is a drive rod, 30 is a drive guide surface, 41 is a guide sleeve, 5 is an upper mold, 50 is a drive seat, 51 is a first inclined surface, 52 is a second inclined surface, 61 is a guide rod, 62 is a guide sleeve, 71 is a horizontal guide rail, 72 is a horizontal slider, 81 is a first top spring, 82 is a second top spring, and 83 is a third top spring. DETAILED DESCRIPTION

[0014] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0016] In addition, if there are descriptions involving "first" or "second" etc. in the embodiments of the utility model, the descriptions of "first" or "second" etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0017] like Figures 1 to 4 As shown, a tube expansion mold for a hollow cylinder of a back plate comprises:

[0018] A base 1, wherein the base 1 is provided with an axially arranged guide hole 10, wherein the guide hole 10 is provided with a plurality of expansion seats 2 radially slidably installed along the guide hole 10, wherein the expansion seats 2 are surrounded by a cylindrical structure, and the plurality of expansion seats 2 can be switched between a position surrounded by a cylinder and a position of expanding outwardly, and when the plurality of expansion seats 2 are surrounded by a cylinder, a hollow driving hole 20 is provided at the rear end of the expansion seat 2;

[0019] A driving device is arranged at the rear position of the base 1, and is used to drive the expansion seat 2 to move between the positions of outward expansion. The driving device includes a driving rod 3 that cooperates with the driving hole 20, and the driving rod 3 slides along the axial direction. The end of the driving rod 3 that contacts the driving hole 20 is provided with an inclined driving guide surface 30.

[0020] In the actual design, through the cooperation between the driving rod 3 and the driving hole 20, when the inclined driving guide surface 30 extends into the driving hole 20, the driving guide surface 30 causes the multiple expansion seats 2 to slide outwardly to expand their diameters, thereby causing the hollow cylinder placed on the outer periphery of the front end of the expansion seat 2 to apply pressure outward, thereby achieving the deformation of the hollow cylinder. The processing steps are simple and convenient, and can be used for the shaping of the hollow cylinder, and can also be used for the expansion of the inner hole of the hollow cylinder, which effectively improves the processing applicability;

[0021] At the same time, by setting the predetermined stroke of the driving rod 3 and the inclination angle of the driving guide surface 30, the processing size of the expansion seat 2 can also be adjusted by the stroke, thereby improving the processing applicability.

[0022] Specifically, the base 1 is provided with a guide groove arranged along the outer peripheral wall of the guide hole 10, and the guide groove is radially distributed with the axis of the guide hole 10. The expansion seat 2 is slidably installed in the guide groove, and the guide groove is provided with a guide block matching the guide groove. The specific structure thereof can also be the cooperation of the guide rail and the slider, and the movement of the expansion seat 2 can also be realized.

[0023] Specifically, an upper mold 5 is also provided above the base 1, and the upper mold 5 is vertically slidably installed on the base 1. The upper mold 5 is connected to a telescopic device. The rear end of the driving rod 3 is provided with a first inclined surface. The upper mold 5 extends downward with a driving seat, and the driving seat is provided with a second inclined surface matching the first inclined surface. When the second inclined surface moves downward, the driving seat can drive the driving rod 3 to move forward and force the expansion seat 2 to move in the direction of outward expansion, thereby realizing the movement of the expansion seat 2.

[0024] Furthermore, a through hole is provided on the rear wall of the base 1 , and a guide sleeve 41 is provided in the through hole. The driving rod 3 is installed in the guide sleeve 41 , thereby achieving smooth sliding of the driving rod 3 .

[0025] In the embodiment of the utility model, the base 1 is provided with a horizontal guide rail, and the driving seat is provided with a horizontal sliding block matched with the horizontal guide rail, thereby realizing the movement of the driving seat.

[0026] Specifically, a guide rod and a guide sleeve are provided between the base 1 and the upper mold 5 , and the guide rod sleeve is provided with a first top spring 81 , which is used to apply an elastic force to the upper mold 5 to move upward, thereby achieving the resetting of the driving seat.

[0027] In the embodiment of the utility model, the inclined driving guide surface 30 is a frustum surface.

[0028] Specifically, a second top spring 82 is provided at the rear end of the expansion seat 2, and the second top spring can apply an elastic force to the expansion seat 2 toward the cylindrical position.

[0029] In the embodiment of the utility model, the driving rod 3 is provided with a third top spring 83, and the third top spring is used to apply backward sliding pressure to the driving rod 3. The mold is reset by setting the first top spring, the second top spring and the third top spring.

[0030] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A tube expansion die for a hollow cylinder of a back plate, characterized in that: include: A base, wherein the base is provided with an axially arranged guide hole, wherein the guide hole is provided with a plurality of expansion seats radially slidably installed along the guide hole, wherein the expansion seats are surrounded by a cylindrical structure, wherein the plurality of expansion seats can be switched between a position where the plurality of expansion seats are surrounded by a cylindrical structure and a position where the plurality of expansion seats are expanded outwardly, and when the plurality of expansion seats are surrounded by a cylindrical structure, a hollow driving hole is provided at the rear end of the expansion seat; A driving device is arranged at the rear position of the base, and is used to drive the expansion seat to move between positions of outward expansion. The driving device includes a driving rod that cooperates with the driving hole, and the driving rod slides along the axial direction. The end of the driving rod that contacts the driving hole is provided with an inclined driving guide surface.

2. The tube expansion die for the hollow cylinder of the back plate according to claim 1, characterized in that: The base is provided with a guide groove arranged along the outer peripheral wall of the guide hole, the guide groove is radially distributed with respect to the axis of the guide hole, the expansion seat is slidably installed in the guide groove, and the guide groove is provided with a guide block matched with the guide groove.

3. The tube expansion die for the hollow cylinder of the back plate according to claim 1, characterized in that: An upper mold is also provided above the base, and the upper mold is vertically slidably installed on the base. The upper mold is connected to a telescopic device. The rear end of the driving rod is provided with a first inclined surface. The upper mold extends downward with a driving seat, and the driving seat is provided with a second inclined surface matching the first inclined surface. When the second inclined surface moves downward, the driving seat can drive the driving rod to move forward and force the expansion seat to move in the direction of outward expansion.

4. The tube expansion die for the hollow cylinder of the back plate according to claim 1, characterized in that: A through hole is arranged on the rear wall of the base, a guide sleeve is arranged on the through hole, and the driving rod is installed in the guide sleeve.

5. The tube expansion die for the hollow cylinder of the back plate according to claim 3, characterized in that: The base is provided with a horizontal guide rail, and the driving seat is provided with a horizontal sliding block matched with the horizontal guide rail.

6. The tube expansion die for the hollow cylinder of the back plate according to claim 3, characterized in that: A guide rod and a guide sleeve are provided between the base and the upper die. The guide rod sleeve is provided with a first top spring, and the first top spring is used to apply an elastic force to the upper die to move upward.

7. The tube expansion die for the hollow cylinder of the back plate according to claim 3, characterized in that: The inclined driving guide surface is a frustum surface.

8. The tube expansion die for the hollow cylinder of the back plate according to claim 3, characterized in that: A second top spring is provided at the rear end of the expansion seat, and the second top spring can apply an elastic force to the expansion seat toward the position of being surrounded into a cylinder.

9. The tube expansion die for the hollow cylinder of the back plate according to claim 4, characterized in that: The driving rod sleeve is provided with a third top spring, and the third top spring is used to apply a pressure to the driving rod to slide backward.

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