CN111589915A

CN111589915A - Pipe bending die

Info

Publication number: CN111589915A
Application number: CN202010545800.7A
Authority: CN
Inventors: 阮周在; 操小龙; 刘旭辉
Original assignee: Zhangzhou Luding Copper Products Co ltd
Current assignee: Zhangzhou Songjing Sanitary Ware Co.,Ltd.
Priority date: 2020-06-16
Filing date: 2020-06-16
Publication date: 2020-08-28

Abstract

The invention discloses a pipe bending die which comprises a pipe bending wheel, a wheel die and a clamping die, wherein the wheel die is fixed on the pipe bending wheel, the wheel die and the clamping die can be matched with each other to clamp a pipe fitting or be separated from each other to release the pipe fitting, a table top for directly placing the pipe fitting is arranged on the wheel die, a matching surface correspondingly matched with the table top is formed on the clamping die, when the wheel die and the clamping die are matched with each other, a clamping cavity for accommodating the pipe fitting is defined by the table top and the matching surface to clamp the pipe fitting, and a pillow position for locking and limiting the wheel die and the clamping die is further arranged on the wheel die and/or the clamping die. The technical scheme of the invention has simple and convenient operation, is not easy to deform, bulge, wrinkle and the like in the pipe bending process, is easy to demould the bent pipe, is suitable for wide-edge type pipe fittings and has better universality.

Description

Pipe bending die

Technical Field

The present invention relates to a pipe bending mold for bending a straight pipe.

Background

The pipe bending mold is a mold for bending a straight pipe into a bent pipe, and generally comprises a pipe bending wheel 10 ', a wheel mold 20' and a clamping mold 30 ', wherein the wheel mold 20' is fixed on the pipe bending wheel 10 ', one end of the straight pipe 40' can be clamped when the wheel mold 20 'and the clamping mold 30' are matched, the pipe bending wheel 10 'is installed and positioned on a driving device, the pipe bending wheel 10' is driven to rotate by the driving force of the driving device, the pipe bending wheel 10 'drives the wheel mold 20' and the clamping mold 30 ', and the wheel mold 20' and the clamping mold 30 'further drive the straight pipe 40' to be bent around the pipe bending wheel 10 ', so that the bent pipe 50' is obtained.

As shown in fig. 1 to 3, in a conventional pipe bending mold, usually, a slot 21 'and a slot 31' are respectively disposed at corresponding positions on a wheel mold 20 'and a clamp mold 30', and during operation, one side of a straight pipe 40 'is inserted into the slot 21' on the wheel mold, and when the wheel mold 20 'and the clamp mold 30' are closed, the other side of the straight pipe 40 'is inserted into the slot 31' on the clamp mold 30 ', and the slot 21' on the wheel mold 20 'and the slot 31' on the clamp mold 30 'enclose a clamping cavity for accommodating the straight pipe 40'.

The inventors have found that the existing bending die has at least the following drawbacks: (1) the straight pipe 40 'needs to be inserted into the slots 21' and 31 'on the wheel mold 20' and the clamping mold 30 ', and the straight pipe 40' is difficult to place; (2) in the pipe bending process, the product is easy to deform, bulge and wrinkle; (3) after the pipe bending process is finished, the formed bent pipe 50 ' can tightly hold the pipe bending wheel 10 ', and the bent pipe 50 ' is difficult to demould; (4) and cannot be applied to wide-edge type pipe fittings.

Disclosure of Invention

The invention aims to solve the problems and provides a pipe bending die which is simple and convenient to operate, is not easy to deform, bulge, wrinkle and the like in a pipe bending process, is easy to demould a bent pipe, is suitable for wide-edge type pipe fittings and has better universality.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the utility model provides a pipe bending mould, includes return bend wheel, wheel mould and clamp mould, the wheel mould is fixed in on the return bend wheel, the wheel mould with the clamp mould can the compound die mutually in order to press from both sides tight pipe fitting or divide the mould mutually in order to release the pipe fitting, be equipped with on the wheel mould and be used for supplying the mesa that the pipe fitting was directly placed, be formed with on the clamp mould with the corresponding complex fitting surface of mesa, when the wheel mould with the clamp mould compound die, the mesa with the fitting surface encloses into a clamping chamber who is used for the holding the pipe fitting is in order to press from both sides the pipe fitting tightly, still be equipped with on the wheel mould and/or the clamp mould and be used for with wheel mould and the pillow position that the clamp mould locking is spacing.

According to the pipe bending die, the table top for directly placing the pipe fitting is arranged on the wheel die, and the matching surface correspondingly matched with the table top is formed on the clamping die, so that the pipe fitting only needs to be directly placed on the table top, and the pipe fitting does not need to be inserted into the corresponding inserting groove as in the scheme of the background art;

in addition, the wheel die and/or the clamping die are/is also provided with the pillow positions for locking and limiting the wheel die and the clamping die, and the pillow positions are always kept in a locking and limiting state during pipe bending, so that the pipe fitting cannot move left and right, and the pipe fitting is not easy to deform, bulge, wrinkle and the like during pipe bending.

Preferably, the table top comprises a transverse table top and a longitudinal table top which are connected, the matching surfaces comprise a transverse matching surface and a longitudinal matching surface which are connected, when the wheel mold and the clamping mold are closed, the transverse table top, the longitudinal table top, the transverse matching surface and the longitudinal matching surface enclose the clamping cavity, and the cross section contour of the clamping cavity is matched with the cross section contour of the pipe fitting. In the technical scheme, the cross sections of the wheel die and the clamping die in the direction perpendicular to the pipe fitting are L-shaped, the two L-shaped dies are combined to form the clamping cavity, the design of the table top and the matching surface is ingenious, and the structure is simple.

Preferably, the pipe bending machine further comprises a guide die, a bearing surface is formed on the pipe bending wheel, the bearing surface is flush with the transverse table surface, the guide die and the bearing surface are detachably matched to form a guide cavity for containing the pipe fitting in a surrounding mode, and the guide cavity is communicated with the clamping cavity. The straight pipe is guided by arranging the guide die, so that the pipe bending process is smoother and better in effect.

Preferably, the pipe bending machine further comprises a straight guide die, the straight guide die is arranged on the bearing surface and can be movably matched with the pipe bending wheel relatively, and the straight guide die, the straight guide die and the transverse table surface jointly enclose the guide cavity. The straight pipe is guided by the straight guide die, so that the pipe bending process is smoother and better in effect.

Preferably, the wheel mold and the clamping mold are respectively provided with the pillow positions, the clamping mold and the wheel mold are correspondingly provided with pillow position grooves matched with the pillow positions, and the pillow positions are embedded into the pillow position grooves to form locking limit when the wheel mold and the clamping mold are combined.

Preferably, a first pillow position is arranged at one end, far away from the longitudinal table surface, of the transverse table surface, and a first pillow position groove matched with the first pillow position is arranged on the longitudinal matching surface; and a second pillow position is arranged at one end of the transverse matching surface far away from the longitudinal matching surface, and a second pillow position groove matched with the second pillow position is arranged on the longitudinal table surface.

Preferably, the outer end of the pillow position is formed with a rounded corner. Among the above-mentioned technical scheme, through being formed with the fillet at the outer end of pillow position, can effectively prevent that the pipe fitting from being hindered or scotch by the outer end clamp of pillow position at the in-process of wheel mould and die clamping.

Preferably, the pipe bending device further comprises a pipe bending mandrel inserted into the pipe fitting, wherein a chain structure is arranged on the pipe bending mandrel, and the chain structure is formed by connecting a plurality of chain links in series. The bending pipe core rod with the chain structure is flexible in movement, can be suitable for bending pipes with various degrees of curvature, and can effectively reduce deformation in the bending pipe process.

Preferably, each link of the chain structure is detachably connected with each other. The chain links are detachably connected, so that the number of the chain links can be selected according to actual needs, and the universality is better.

Preferably, the wheel mold is fixed on the pipe bending wheel through a fastener, and a dovetail groove structure is adopted between the wheel mold and the pipe bending wheel for positioning. The wheel mold and the pipe bending wheel are positioned by adopting a dovetail groove structure, the structure is simple, and the assembly is convenient.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic perspective view of a wheel mold and a clamping mold of a bending mold in a mold separation state according to the prior art;

FIG. 2 is a schematic perspective view of a prior art bending mold with a wheel mold and a clamping mold in a mold-matching state;

FIG. 3 is a schematic perspective view of a prior art bend mold at the end of a bend;

FIG. 4 is an exploded view of a bending mold according to an embodiment of the present invention;

fig. 5 is a schematic perspective view of a wheel mold and a clamping mold of the pipe bending mold according to an embodiment of the present invention in a mold separation state;

fig. 6 is a schematic perspective view of a wheel mold and a clamping mold of a pipe bending mold according to an embodiment of the present invention in a mold matching state;

FIG. 7 is one of schematic perspective views of a pipe bending mold at the end of pipe bending according to an embodiment of the present invention;

fig. 8 is a second schematic perspective view of a pipe bending mold according to an embodiment of the present invention at the end of pipe bending;

FIG. 9 is a schematic view of a wheel mold and a bending wheel of a bending mold according to an embodiment of the present invention;

FIG. 10 is a schematic perspective view of a mandrel for bending a pipe according to an embodiment of the present invention;

FIG. 11 is another schematic representation of the cross-sectional profile of the tube of the present invention;

FIG. 12 is a further schematic representation of the cross-sectional profile of the tube of the present invention.

The reference signs are:

10-a pipe bending wheel; 11-a bearing surface;

20-wheel mould; 21-a table top; 211-lateral mesa; 212-longitudinal table top; 22-a first pillow position; 23-a second pillow slot;

30-clamping the mold; 31-a mating face; 311-lateral mating surfaces; 312-longitudinal mating surfaces; 32-a first pillow slot; 33-second pillow position;

40-a pipe fitting; 50-bending the pipe;

60-guiding a mold; 70-straightening a mould;

80-bending the pipe core rod; 81-chain structure; 90-dovetail groove structure.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 4 to 10, a pipe bending mold according to a preferred embodiment of the present invention includes a pipe bending wheel 10, a wheel mold 20 and a clamping mold 30, wherein the wheel mold 20 is fixed to the pipe bending wheel 10 by a fastener (screw). The wheel mold 20 and the clamping mold 30 can be matched to clamp the pipe 40 or be separated to release the pipe 40, a table surface 21 for directly placing the pipe 40 is arranged on the wheel mold 20, a matching surface 31 correspondingly matched with the table surface 21 is formed on the clamping mold 30, and when the wheel mold 20 and the clamping mold 30 are matched, the table surface 21 and the matching surface 31 enclose a clamping cavity for accommodating the pipe 40 so as to clamp the pipe 40. The table top 21 for directly placing the pipe fitting 40 is arranged on the wheel die 20, and the matching surface 31 correspondingly matched with the table top 21 is formed on the clamping die 30, so that the pipe fitting 40 is directly placed on the table top 21, and the pipe fitting 40 does not need to be inserted into the corresponding inserting grooves 21 'and 31' as in the scheme of the background art.

The wheel die 20 and/or the clamping die 30 are/is also provided with pillow positions for locking and limiting the wheel die 20 and the clamping die 30, and the pillow positions are always kept in a locking and limiting state during pipe bending, so that the pipe fitting 40 cannot move up and down and left and right, and the pipe fitting 40 is not easy to deform, bulge, wrinkle and the like during pipe bending.

Specifically, in the present embodiment, the table 21 includes a transverse table 21 and a longitudinal table 21 connected to each other, and the matching surface 31 includes a transverse matching surface 31 and a longitudinal matching surface 31 connected to each other, so that the section of the wheel mold 20 and the clamp mold 30 in the direction perpendicular to the placement direction of the pipe 40 is L. When the wheel mold 20 and the clamping mold 30 are closed, the transverse table surface 21, the longitudinal table surface 21, the transverse matching surface 31 and the longitudinal matching surface 31 enclose the clamping cavity, namely, the two L-shaped molds are closed diagonally and form the clamping cavity, the cross section contour of the clamping cavity is matched with the cross section contour of the pipe fitting 40, and the design of forming the table surface 21 and the matching surface 31 is ingenious and the structure is simple. The cross-sectional profile of the tube 40 of the present embodiment is rectangular, but the cross-sectional profile of the tube 40 may be square, racetrack, or other shapes, and the invention is not limited thereto. For example, the cross-sectional profile of the tube 40 shown in fig. 11 is racetrack shaped, and the cross-sectional profile of the tube 40 shown in fig. 12 is arc shaped with one pair of sides being parallel and the other pair of sides being symmetrical. The tube 40 of fig. 11 and 12 is also wide-edged, although the invention is also applicable to narrow-edged tube constructions.

In this embodiment, in order to make the tube bending process smoother and better in effect, the tube bending mold further includes a guide mold 60, the tube bending wheel 10 is formed with a bearing surface 11, the bearing surface 11 is flush with the transverse table surface 21, the guide mold 60 and the bearing surface 11 are separably matched to enclose a guide cavity for accommodating the tube 40, and the guide cavity is communicated with the clamping cavity.

In order to further make the tube bending process smoother and more effective, in this embodiment, the tube bending machine further includes a straight guide mold 70, the straight guide mold 70 is disposed on the bearing surface 11 and can be movably engaged with the tube bending wheel 10 relatively, the straight guide mold 70, the straight guide mold 60 and the transverse table 21 together enclose a guide cavity, and the straight guide mold 70 can guide the straight tube.

In this embodiment, the wheel mold 20 and the clamping mold 30 are respectively provided with pillow positions, and correspondingly, the clamping mold 30 and the wheel mold 20 are provided with pillow position grooves matched with the pillow positions, and when the wheel mold 20 and the clamping mold 30 are closed, the pillow positions are embedded into the pillow position grooves to form locking limit, so that the pillow positions are always kept in the locking limit state during pipe bending, and the pipe fitting 40 cannot move up and down and left and right, so that the pipe fitting 40 is not easy to deform, bulge, wrinkle and the like during pipe bending. Specifically, a first pillow position 22 is arranged at one end of the transverse table surface 21 far away from the longitudinal table surface 21, and a first pillow position groove 32 matched with the first pillow position 22 is arranged on the longitudinal matching surface 31; a second pillow position 33 is arranged at one end of the transverse matching surface 31 far away from the longitudinal matching surface 31, and a second pillow groove 23 matched with the second pillow position 33 is arranged on the longitudinal table surface 21.

In order to effectively prevent the pipe 40 from being pinched or scratched by the outer end of the pillow during the process of clamping the wheel mold 20 and the clamping mold 30, in the present embodiment, the outer end of the pillow is formed with a rounded corner.

Referring to fig. 1 and 10, in the present embodiment, the bending mandrel 80 is further included for being inserted into the pipe 40, a chain structure 81 is disposed on the bending mandrel 80, and the chain structure 81 is formed by connecting a plurality of chain links in series. By adopting the pipe bending mandrel 80 with the chain structure 81, the pipe bending mandrel 80 is flexible in movement, can be suitable for the pipe bending 50 with various bending degrees, and can effectively reduce deformation in the pipe bending process.

Specifically, in this embodiment, each link of the chain structure 81 is detachably connected to another link. Through designing into detachably to connect between the chain link, can select the quantity of chain link like this according to actual need such as crookedness and length of return bend, the commonality is better.

Referring to fig. 9, in order to facilitate the fixed connection between the wheel mold 20 and the pipe bending wheel 10, the wheel mold 20 and the pipe bending wheel 10 are positioned by using a dovetail groove structure 90, so that the structure is simple and the assembly of the two is more convenient.

Referring to fig. 5 to 8, fig. 5 is a schematic perspective view illustrating a wheel mold 10 and a clamping mold 30 of the tube bending mold in a mold separation state according to the present embodiment; fig. 6 is a schematic perspective view of the wheel mold 10 and the clamping mold 30 of the bending mold according to the present embodiment in a mold matching state; FIG. 7 is one of schematic perspective views of the bending mold of the present embodiment at the end of bending; fig. 8 is a second schematic perspective view of the bending mold according to the present embodiment at the end of bending.

While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a pipe bending mould, includes return bend wheel, wheel mould and clamp mould, the wheel mould is fixed in on the return bend wheel, the wheel mould with the clamp mould can the compound die mutually in order to press from both sides tight pipe fitting or divide the mould mutually in order to release the pipe fitting, its characterized in that, be equipped with on the wheel mould and be used for supplying the mesa that the pipe fitting was directly placed, be formed with on the clamp mould with the corresponding complex fitting surface of mesa, when wheel mould and clamp mould compound die, the mesa with the fitting surface encloses into a clamping chamber who is used for holding the pipe fitting is in order to press from both sides the pipe fitting and press from both sides tightly, still be equipped with on the wheel mould and/or the clamp mould and be used for with wheel mould and the spacing pillow of clamp mould locking.

2. The bending die according to claim 1, wherein the table comprises a transverse table and a longitudinal table which are connected, the matching surfaces comprise a transverse matching surface and a longitudinal matching surface which are connected, when the wheel die and the clamping die are matched, the transverse table, the longitudinal table, the transverse matching surface and the longitudinal matching surface enclose the clamping cavity, and the cross section of the clamping cavity has a contour matched with that of the pipe.

3. The pipe bending die according to claim 2, further comprising a guide die, wherein a bearing surface is formed on the pipe bending wheel, the bearing surface is flush with the transverse table surface, the guide die and the bearing surface are detachably matched to form a guide cavity for accommodating the pipe fitting, and the guide cavity is communicated with the clamping cavity.

4. The bending die according to claim 3, further comprising a straightening die disposed on the carrying surface and movably engaged with the bending wheel, wherein the straightening die, the straightening die and the transverse table together define the guiding cavity.

5. The pipe bending die according to claim 1, wherein the wheel die and the clamping die are respectively provided with the pillow positions, correspondingly, the clamping die and the wheel die are provided with pillow position grooves matched with the pillow positions, and when the wheel die and the clamping die are combined, the pillow positions are embedded into the pillow position grooves to form locking limit.

6. The bending die according to claim 5, wherein a first pillow position is arranged at one end of the transverse table top, which is far away from the longitudinal table top, and a first pillow position groove matched with the first pillow position is arranged on the longitudinal matching surface; and a second pillow position is arranged at one end of the transverse matching surface far away from the longitudinal matching surface, and a second pillow position groove matched with the second pillow position is arranged on the longitudinal table surface.

7. The bending die of claim 1, wherein the outer ends of the pillow portions are formed with rounded corners.

8. The pipe bending die according to claim 1, further comprising a pipe bending mandrel for insertion into the pipe, wherein the pipe bending mandrel is provided with a chain structure, and the chain structure is formed by connecting a plurality of chain links in series.

9. A bending mould according to claim 8, wherein each link of the chain structure is detachably connected to another link of the chain structure.

10. The pipe bending die according to claim 1, wherein the wheel die is fixed on the pipe bending wheel through a fastener, and the wheel die and the pipe bending wheel are positioned by a dovetail groove structure.