Pipe contracting die

Abstract

The utility model relates to a contracted pipe mould, a fixed contracted pipe is detachably mounted on the upper side surface of a fixed plate and surrounds a middle hole of the fixed plate, and a first conical working hole is formed in an upper port of the fixed contracted pipe; the movable contracted pipe is arranged above the fixed contracted pipe and is supported and limited by the positioning pipe, so that the movable contracted pipe can be relatively close to or far away from the fixed contracted pipe; the movable contracted pipe is provided with a second conical working hole which is coaxially opposite to the first conical working hole and opposite to the first conical working hole in conical direction; a plurality of contracted pipe driving single bodies are arranged between the fixed contracted pipe and the movable contracted pipe and arranged around the center line of the middle hole to form an expandable shaping pipe, and a first driving inclined face and a second driving inclined face which are back to back are arranged on the outer side face of each contracted pipe driving single body. The movable contracted pipe moves towards the fixed contracted pipe, so that the inner walls of the first conical working hole and the second conical working hole act on the first driving inclined face and the second driving inclined face respectively, the multiple contracted pipe driving single bodies are synchronously and radially contracted, contracted pipe machining is achieved, the device can adapt to machining of pipe bodies with different pipe diameters, and the device has the advantages of being convenient to disassemble, assemble and maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of production molds, in particular to a shrinking mold for processing a tube body to obtain a corresponding shrinking shape. Background Art

[0002] During production, such as the production of silencers, it is necessary to shrink the pipe body, that is, to shrink the pipe body locally to obtain the required pipe diameter to meet the production needs. The pipe shrinking mold is currently a common tool for shrinking the pipe body, which is combined with a pipe shrinking machine for shrinking. In the prior art, the pipe shrinking mold is mostly formed in one piece, and the suitable pipe diameter size is fixed. Therefore, for different calibers of pipe fittings, different pipe shrinking molds need to be replaced, which brings inconvenience to production and needs further improvement. Summary of the invention

[0003] The purpose of the utility model is to provide a tube shrinking mold to optimize the product structure and solve the above technical problems well.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A tube shrinking mold, comprising:

[0006] A fixing plate, wherein the fixing plate has a central hole extending through the upper and lower sides;

[0007] A fixed shrink tube, which is detachably mounted on the upper side of the fixed plate and surrounds the middle hole. The fixed shrink tube is convex, and a first conical working hole is provided at the upper end of the fixed shrink tube. The center line of the first conical working hole coincides with the center line of the middle hole.

[0008] A movable shrink tube, which is arranged above the fixed shrink tube and is supported and limited by the positioning tube, so that the movable shrink tube can be relatively close to or away from the fixed shrink tube, and the positioning tube is installed on the fixed plate in a detachable form; the movable shrink tube has a second conical working hole, which is coaxially opposite to the first conical working hole, and the second conical working hole and the first conical working hole have opposite conical directions;

[0009] A plurality of shrink tube drive units are arranged between the fixed shrink tube and the movable shrink tube and are arranged around the center line of the central hole to form an expandable and contractible shaping tube. The inner side surface of the shrink tube drive unit is a shaping surface extending toward the center line, and the outer side surface of the shrink tube drive unit is provided with a first driving inclined surface and a second driving inclined surface opposite to each other. The first driving inclined surface abuts against the inner wall of the first conical working hole of the fixed shrink tube and can move axially relative to it, and the second driving inclined surface abuts against the inner wall of the second conical working hole of the movable shrink tube and can move axially relative to it. By moving the movable shrink tube toward the fixed shrink tube, the inner walls of the first conical working hole and the second conical working hole act on the first driving inclined surface and the second driving inclined surface respectively, so that the plurality of shrink tube drive units are synchronously radially shrunk to achieve shrink tube processing.

[0010] The above scheme is further that the two adjacent shrinkage tube driving monomers in the shaping tube are supported by tangential springs on the sides that abut each other, and the two ends of the spring are respectively fixed in the fixing grooves on the sides of the corresponding two shrinkage tube driving monomers. The shrinkage tube driving monomers show a relative expansion trend due to the support of the springs, so that the two ends of the shrinkage tube driving monomers are respectively against the fixed shrinkage tube and the movable shrinkage tube, and the first driving bevel and the second driving bevel are respectively matched and overlapped with the inner walls of the first conical working hole and the second conical working hole and can move axially relative to each other.

[0011] The above scheme is further that the shrinkable tube driving unit is a symmetrical structure, the first driving inclined surface and the second driving inclined surface are symmetrically arranged on the shrinkable tube driving unit; and the shaping surface is a straight surface extending toward the center line direction.

[0012] The above scheme is further that the fixed shrinkage tube is installed on the upper side of the fixed plate by screw locking, and the positioning tube is simultaneously sleeved on the outer circumference of the fixed shrinkage tube and the movable shrinkage tube, and the inner wall of the positioning tube is simultaneously against the fixed shrinkage tube and the movable shrinkage tube; the lower end of the positioning tube is installed on the fixed plate by screw locking, and the upper end of the positioning tube is provided with an inwardly folded anti-detachment portion, and the movable shrinkage tube is restricted by the anti-detachment portion being clamped with a preset hanging platform on the outer circumference of the movable shrinkage tube.

[0013] With the above structure, the shrinking tube mold provided by the utility model utilizes the relative movement between the movable shrinking tube and the fixed shrinking tube, and a plurality of shrinking tube driving monomers are arranged between the fixed shrinking tube and the movable shrinking tube and arranged around the center line of the middle hole to form an expandable and contractible shaping tube. The tube body to be processed is passed through the inside of the shaping tube, and then the movable shrinking tube moves toward the fixed shrinking tube, so that the inner walls of the first conical working hole and the second conical working hole act on the first driving inclined surface and the second driving inclined surface respectively, so that the plurality of shrinking tube driving monomers synchronously contract radially to achieve extrusion and shrinking tube processing. The shaping tube is composed of a plurality of shrinking tube driving monomers spliced ​​together and can expand and contract relatively, can adapt to the processing of tube bodies of different diameters, and has the characteristics of convenient disassembly, maintenance and replacement, thereby improving the performance of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 This is a schematic diagram of the structure of a preferred embodiment of the utility model;

[0015] Attached Figure 2 for Figure 1 Schematic diagram of structural decomposition;

[0016] Attached Figure 3 for Figure 1 Cross-sectional view of the working structure. DETAILED DESCRIPTION

[0017] The concept, specific structure and technical effects of the utility model will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the utility model.

[0018] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0019] See also Figure 1 , 2, 3 are schematic diagrams of preferred embodiments of the present invention. The present invention is related to a tube shrinking mold, which has a fixed plate 1, a fixed tube shrinking 2, a movable tube shrinking 3, a positioning tube 4 and several tube shrinking driving units 5. The fixed plate 1 is adapted to be installed on the machine platform of the tube shrinking machine to provide installation positioning and support. The interior of the fixed plate 1 is provided with a middle hole 11 that passes through the upper and lower sides so that the tube body to be processed can pass through. At the same time, the corresponding export effect can be obtained, and the tube body can be taken out, or the waste chips generated during the production of the tube shrinking can be automatically dropped out to avoid being retained in the tube shrinking processing area. The fixed tube shrinking 2 is installed on the upper side of the fixed plate 1 in a detachable manner and surrounds the middle hole 11. The fixed tube shrinking 2 is convex, and a first conical working hole 21 is provided at the upper end of the fixed tube shrinking 2. The center line of the first conical working hole 21 coincides with the center line of the middle hole 11. The movable shrink tube 3 is arranged above the fixed shrink tube 2 and supported and limited by the positioning tube 4, so that the movable shrink tube 3 can be relatively close to or away from the fixed shrink tube 2. The positioning tube 4 is installed on the fixed plate 1 in a detachable form, which is convenient for disassembly and maintenance. The movable shrink tube 3 has a second tapered working hole 31, which is coaxially opposite to the first tapered working hole 21, and the second tapered working hole 31 and the first tapered working hole 21 have opposite tapers. Several shrinking tube driving monomers 5 are arranged between the fixed shrinking tube 2 and the movable shrinking tube 3 and are arranged around the center line of the middle hole 11 to form an expandable and contractible plastic tube. The inner side surface of the shrinking tube driving monomer 5 is a plastic surface 54 extending in the direction of the center line, and the plastic surface 54 contacts and extrude the surface of the tube body to be processed; and the outer side surface of the shrinking tube driving monomer 5 is provided with a first driving inclined surface 51 and a second driving inclined surface 52 opposite to each other, the first driving inclined surface 51 abuts against the inner wall of the first conical working hole 21 of the fixed shrinking tube 2 and can move axially relative to it, and the second driving inclined surface 52 abuts against the inner wall of the second conical working hole 31 of the movable shrinking tube 3 and can move axially relative to it; it is achieved that several shrinking tube driving monomers 5 are supported by the fixed shrinking tube 2 and the movable shrinking tube 3 at the same time, and move toward the fixed shrinking tube 2 through the movable shrinking tube 3, so that the inner walls of the first conical working hole 21 and the second conical working hole 31 act on the first driving inclined surface 51 and the second driving inclined surface 52 respectively, so that several shrinking tube driving monomers 5 are synchronously radially contracted to achieve shrinking tube processing. During operation, the movable shrink tube 3 is connected to a corresponding driving member, such as a lifting mechanism on the shrink tube machine, so that the movable shrink tube 3 is relatively close to or away from the fixed shrink tube 2 .

[0020] In this embodiment, the two adjacent shrink tube drive monomers 5 in the shaping tube are supported by tangential springs 6 on the sides that abut each other. The two ends of the springs 6 are respectively fixed in the fixing grooves 53 on the sides of the corresponding two shrink tube drive monomers 5. The shrink tube drive monomers 5 are supported by the springs 6 and show a relative expansion trend, so that the two ends of the shrink tube drive monomers 5 are respectively against the fixed shrink tube 2 and the movable shrink tube 3. The first drive bevel 51 and the second drive bevel 52 are respectively matched and overlapped with the inner walls of the first conical working hole 21 and the second conical working hole 31 and can move axially relative to each other. Specifically, when the two adjacent shrink tube drive monomers 5 are arranged, they are relatively pulled apart by the springs 6 to obtain an adapted shrink gap. With the support of the fixed shrink tube 2 and the movable shrink tube 3, several shrink tube drive monomers 5 can be maintained as an expandable shaping tube to meet the needs of shrinkage extrusion processing and expansion release.

[0021] In this embodiment, preferably, the shrink tube drive monomer 5 is a symmetrical structure, the first drive bevel 51 and the second drive bevel 52 are symmetrically arranged on the shrink tube drive monomer 5, and the fixing groove 53 is arranged in the symmetrical reference area of ​​the first drive bevel 51 and the second drive bevel 52, and the fixing groove 53 is a circular hole and matches the outer diameter of the spring 6; the shaping surface 54 is a straight surface extending in the direction of the center line, which is suitable for the beam tube shaping processing of the muffler pipe body. Of course, the shaping surface 54 can also be a curved surface or a step surface, etc., which will not be described one by one in detail. The shrink tube drive monomer 5 of this embodiment has a simple structure and is convenient for processing, manufacturing and assembly.

[0022] In this embodiment, the fixed shrink tube 2 is installed on the upper side of the fixed plate 1 by screw locking, and the positioning tube 4 is simultaneously sleeved on the outer periphery of the fixed shrink tube 2 and the movable shrink tube 3, and the inner wall of the positioning tube 4 is simultaneously against the fixed shrink tube 2 and the movable shrink tube 3. The lower end of the positioning tube 4 is installed on the fixed plate 1 by screw locking, and the upper end of the positioning tube 4 is provided with an inward folding anti-slip portion 41, and the movable shrink tube 3 is restricted by the anti-slip portion 41 and the preset hanging platform 32 on the outer periphery of the movable shrink tube 3 to prevent the movable shrink tube 3 from detaching from the positioning tube 4. As shown in the figure, the anti-slip portion 41 is a raised ring edge of the inner wall of the positioning tube 4, and the positioning tube 4 restricts the control of the movable shrink tube 3 when it is installed on the fixed plate 1; further, the end of the positioning tube 4 connected to the fixed plate 1 is also connected by an annular adjustment pad 7, thereby the space controlled by the positioning tube 4 can be adjusted by the number of superposition of the annular adjustment pads 7, and the axial distance between the movable shrink tube 3 and the fixed shrink tube 2 can be adjusted to effectively cooperate with the shaping tube to meet different production specifications.

[0023] The utility model utilizes the relative movement between the movable shrink tube and the fixed shrink tube, and a plurality of shrink tube driving monomers are arranged between the fixed shrink tube and the movable shrink tube and arranged around the center line of the middle hole to form an expandable and contractible shaping tube. The tube body to be processed is passed through the inside of the shaping tube, and then the movable shrink tube moves toward the fixed shrink tube, so that the inner walls of the first conical working hole and the second conical working hole act on the first driving inclined surface and the second driving inclined surface respectively, so that the plurality of shrink tube driving monomers synchronously contract radially to achieve extrusion and compression tube processing. The shaping tube is composed of a plurality of shrink tube driving monomers spliced ​​together and can expand and contract relatively, can adapt to the processing of tube bodies of different diameters, and has the characteristics of convenient disassembly, maintenance and replacement, thereby improving the performance of use.

[0024] Although the preferred specific embodiments of the present invention are described above in conjunction with the accompanying drawings, the present invention should not be limited to the structures and operations that are exactly the same as the above description and the accompanying drawings. For those skilled in the art, many equivalent improvements and changes can be made to the above embodiments through logical analysis, reasoning or limited experiments without exceeding the concept and scope of the present invention, but these improvements and changes should all fall within the scope of protection required by the present invention.

Claims

1. A tube shrinking mold, characterized in that: have: A fixing plate (1), wherein a central hole (11) is provided inside the fixing plate (1) and passes through the upper and lower side surfaces; A fixed shrink tube (2), the fixed shrink tube (2) being detachably mounted on the upper side of the fixed plate (1) and surrounding the middle hole (11), the fixed shrink tube (2) being convex, and a first conical working hole (21) being provided at the upper end of the fixed shrink tube (2), the center line of the first conical working hole (21) being coincident with the center line of the middle hole (11); A movable shrink tube (3), the movable shrink tube (3) being arranged above the fixed shrink tube (2) and supported and restricted by a positioning tube (4), so that the movable shrink tube (3) can be relatively close to or away from the fixed shrink tube (2), and the positioning tube (4) is mounted on the fixed plate (1) in a detachable manner; the movable shrink tube (3) having a second conical working hole (31), the second conical working hole (31) being coaxially opposite to the first conical working hole (21), and the second conical working hole (31) and the first conical working hole (21) have opposite conical directions; A plurality of shrink tube drive units (5) are arranged between a fixed shrink tube (2) and a movable shrink tube (3) and are arranged around the center line of a central hole (11) to form an expandable and contractible shaping tube. The inner side surface of the shrink tube drive unit (5) is a shaping surface (54) extending in the direction of the center line, and the outer side surface of the shrink tube drive unit (5) is provided with a first driving inclined surface (51) and a second driving inclined surface (52) facing each other. The first driving inclined surface (51) is aligned with the first conical working hole (21) of the fixed shrink tube (2). The inner wall of the hole abuts against and can move axially relative to the inner wall of the second conical working hole (31) of the movable shrink tube (3), and can move axially relative to the inner wall of the hole; the movable shrink tube (3) moves toward the fixed shrink tube (2), so that the inner walls of the first conical working hole (21) and the second conical working hole (31) act on the first driving inclined surface (51) and the second driving inclined surface (52) respectively, so that the plurality of shrink tube driving units (5) are synchronously radially contracted, thereby achieving shrink tube processing.

2. A tube shrinking mold according to claim 1, characterized in that: Two adjacent shrink tube drive monomers (5) in the shaping tube are supported by tangential springs (6) on the sides abutting against each other, and the two ends of the springs (6) are respectively fixed in fixed grooves (53) on the sides of the two corresponding shrink tube drive monomers (5). The shrink tube drive monomers (5) are supported by the springs (6) and show a relative expansion tendency, so that the two ends of the shrink tube drive monomers (5) are respectively abutted against the fixed shrink tube (2) and the movable shrink tube (3), and the first drive inclined surface (51) and the second drive inclined surface (52) are respectively matched and overlapped with the inner walls of the first tapered working hole (21) and the second tapered working hole (31) and can move axially relative to each other.

3. A tube shrinking mold according to claim 1 or 2, characterized in that: The shrinkable tube drive unit (5) is a symmetrical structure; the first drive inclined surface (51) and the second drive inclined surface (52) are symmetrically arranged on the shrinkable tube drive unit (5); and the shaping surface (54) is a straight surface extending in the direction of the center line.

4. A tube shrinking mold according to claim 1, characterized in that: The fixed shrink tube (2) is mounted on the upper side of the fixed plate (1) by means of screw locking, and the positioning tube (4) is simultaneously sleeved on the outer peripheries of the fixed shrink tube (2) and the movable shrink tube (3), and the inner wall of the positioning tube (4) abuts against the fixed shrink tube (2) and the movable shrink tube (3); the lower end of the positioning tube (4) is mounted on the fixed plate (1) by means of screw locking, and the upper end of the positioning tube (4) is provided with an inwardly folded anti-slip portion (41), and the movable shrink tube (3) is restricted by the anti-slip portion (41) being engaged with a preset hanging platform (32) on the outer periphery of the movable shrink tube (3).

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