Quick change structure and quick change method for pipe bending machine die

Abstract

The invention discloses a quick change structure and method for a pipe bending machine die, and the quick change structure comprises a die clamping adapter, a first dovetail groove is formed in one side of the die clamping adapter, and a first cross beam and a first vertical beam are arranged on the other side of the die clamping adapter; the clamping die is arranged on the side, away from the clamping die adapter, of the clamping die, a first transverse groove and a first vertical groove are formed in one end of the clamping die, and a clamping groove is formed in the other end of the clamping die. The guide die adapter is arranged on one side of the clamping die adapter, a second dovetail groove is formed in one side of the guide die adapter, and a second cross beam and a second vertical beam are arranged on the other side of the guide die adapter; the guide die is arranged on one side of the guide die adapter, one end of the guide die is provided with a second transverse groove and a second vertical groove, and the other end of the guide die is provided with a guide groove. According to the mold replacing device, rapid and accurate replacement of the mold is achieved, and the mold replacing efficiency is effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of mold technology, and in particular to a quick-changing structure and method for a pipe bending machine mold. Background Art

[0002] Due to the characteristics of the pipe bending machine mold, it is known that the mold must be replaced when processing bent pipe fittings of different diameters. To replace the bending mold of different diameters, a complete set must be replaced, including 4 parts: wheel mold, clamp mold, guide mold, and clamp barrel. When the pipe bending machine replaces the bending mold, at least three major parts, namely the wheel mold, clamp mold and guide mold, need to be replaced. Among them, the connection between the pipe bending machine and the wheel mold has two structures: vertical holes and horizontal keys, which can be quickly positioned and then tightened with screws; the clamp barrel can be fixed by screw connection and can also be quickly replaced. However, the connection between the pipe bending machine and the clamp mold and guide mold only has a groove parallel to the direction of gravity on the right side, and then a strip dovetail pressure plate with the same width as the groove is used to connect and press the clamp mold and guide mold with the dovetail groove.

[0003] In order to meet the applicability of mold installation, the clamping die and the guide die are movable in the direction of gravity during the installation process of the pipe bending machine, resulting in the need for manual height adjustment of the clamping die and the guide die after each mold change. Each adjustment requires the mold to be supported to prevent it from falling. Moreover, some molds are relatively heavy, requiring one person to support the mold on the left side of the pipe bending machine, and the other to loosen or tighten the screws on the right side of the pipe bending machine, which is very inconvenient. It usually takes two people 1-4 hours to complete a mold change of the pipe bending machine (more than 90% of the time is wasted on installing the guide die and clamping die), and the mold change efficiency is low. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a quick-changing structure and method for a pipe bending machine mold, which realizes rapid and accurate replacement of the mold and effectively improves the mold changing efficiency.

[0005] The present invention provides a quick-change structure for a pipe bending machine mold, comprising:

[0006] A mold clamp adapter, having a first vertical dovetail groove formed on one side thereof in the X-axis direction, and a first horizontal beam and a first vertical beam fixedly provided on a side wall thereof away from the first dovetail groove;

[0007] A clamping die is provided on a side of the clamping die adapter away from the first dovetail groove, one end of the clamping die is provided with a first horizontal groove corresponding to the first horizontal beam, a first vertical groove corresponding to the first vertical beam, and the other end of the clamping die is provided with a clamping groove;

[0008] The guide mold adapter is arranged on one side of the clamping mold adapter in the Y-axis direction, and a vertical second dovetail groove is formed on one side of the guide mold adapter in the X-axis direction, and a second horizontal beam and a second vertical beam are fixedly provided on the side wall away from the second dovetail groove;

[0009] A guide die is provided on a side of the guide die adapter away from the second dovetail groove, one end of the guide die is provided with a second transverse groove corresponding to the second transverse beam, a second vertical groove corresponding to the second vertical beam, and the other end of the guide die is provided with a guide groove;

[0010] When the first horizontal beam is inserted into the first horizontal groove with a clearance fit, and the first vertical beam is inserted into the first vertical groove with a clearance fit, the clamping groove on the clamping die is aligned with the curved groove on the wheel die of the same specification; the clamping die is fixedly connected to the clamping die adapter by a first screw;

[0011] When the second horizontal beam is loosely fitted into the second horizontal groove, and the second vertical beam is loosely fitted into the second vertical groove, the guide groove on the guide mold is aligned with the clamping groove on the clamping mold of the same specification; the guide mold is fixedly connected to the guide mold adapter by a second screw.

[0012] Furthermore, the clamping die adapter is provided with a plurality of first screw holes avoiding the first horizontal beam and the first vertical beam, for installing and fixing the clamping dies of different specifications;

[0013] The guide mold adapter is provided with a plurality of second screw holes avoiding the second transverse beam and the second vertical beam, for installing and fixing the guide molds of different specifications.

[0014] Furthermore, the first horizontal beam and the first vertical beam are integrally formed with the clamping die adapter; the second horizontal beam and the second vertical beam are integrally formed with the guide die adapter.

[0015] Furthermore, the clamping die adapter is provided with two first cross beams distributed vertically, and one end of the two first cross beams away from the guide die adapter is commonly connected to a first longitudinal connecting beam, and the first longitudinal connecting beam is integrally formed with the clamping die adapter;

[0016] The guide mold adapter is provided with two second cross beams distributed up and down, and one end of the two second cross beams away from the clamping mold adapter is commonly connected to a second longitudinal connecting beam, and the second longitudinal connecting beam is integrally formed with the guide mold adapter.

[0017] Furthermore, the first vertical beam is a breakpoint structure to avoid the first horizontal beam; or the first horizontal beam is a breakpoint structure to avoid the first vertical beam;

[0018] The second vertical beam is a breakpoint structure to avoid the second horizontal beam; or the second horizontal beam is a breakpoint structure to avoid the second vertical beam.

[0019] In addition, the present invention also provides a quick-changing method using the above-mentioned pipe bending machine mold quick-changing structure, comprising the following steps:

[0020] 1) Remove the original clamp, wheel die, clamp die and guide die;

[0021] 2) Align the first transverse groove and the first vertical groove on the new clamp with the first transverse beam and the first vertical beam on the clamp adapter, respectively, and securely connect the clamp to the clamp adapter using the first screw;

[0022] 3) Align the second transverse groove and the second vertical groove on the new guide mold with the second transverse beam and the second vertical beam on the guide mold adapter, respectively, and securely connect the guide mold to the guide mold adapter using a second screw;

[0023] 4) Install new clamping cylinder and wheel die.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention designs a clamping die adapter and a guide die adapter on the basis of the original installation structure of the mold, and still adopts the original strip dovetail pressure plate to connect them. The two are installed at the connection of the original clamping die and guide die of the pipe bending machine at one time, and are permanently connected to the pipe bending machine without repeated disassembly and assembly. At the same time, the clamping die and the guide die are improved. The positioning structure of the clamping die adapter and the guide die adapter is unique. After the improvement, the positioning structure of the clamping die and the guide die of different specifications is not unique. According to the structural design of the matching wheel mold and the two adapters, the requirements of fast positioning and installation are met. Through the cooperation of the horizontal groove, the vertical groove and the horizontal beam and the longitudinal beam, the clamping die and the guide die are positioned and installed on the clamping die adapter and the guide die adapter respectively, which realizes the fast and accurate positioning between the various structures of the mold, saves the time of position adjustment during the replacement of the original mold structure, realizes the fast and accurate replacement of the mold, and effectively improves the efficiency of mold change.

[0026] The other end of the adapter features a universal interface structure for connecting the new clamping die and the new guide die. The adapter's interface consists of a convex horizontal and vertical positioning beams, and multiple threaded holes. The interface between the new clamping die and the new guide die consists of a concave horizontal and vertical positioning grooves, and threaded holes. The horizontal and vertical beams allow for quick and accurate positioning of different new clamping dies and guide dies, and they can be clamped from the front using hexagon socket head screws.

[0027] It should be understood that the contents described in the summary of the invention are not intended to limit the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0029] Figure 1 It is a structural diagram of the quick-change structure of the pipe bending machine mold;

[0030] Figure 2 It is a structural diagram of the mold clamp adapter;

[0031] Figure 3 Schematic diagram of the structure of the clamping die;

[0032] Figure 4 Schematic diagram of the structure of the guide mold adapter;

[0033] Figure 5 Schematic diagram of the structure of the guide mold.

[0034] Numbers in the figure: 1, clamping die adapter; 2, clamping die; 3, guide die adapter; 4, guide die; 5, wheel die; 6, clamping cylinder;

[0035] 11. First dovetail groove; 12. First horizontal beam; 13. First vertical beam; 14. First screw hole; 15. First longitudinal connecting beam;

[0036] 21. First transverse groove; 22. First vertical groove; 23. Clamping groove; 24. First screw;

[0037] 31. Second dovetail groove; 32. Second horizontal beam; 33. Second vertical beam; 34. Second screw hole; 35. Second longitudinal connecting beam;

[0038] 41. Second crossbeam; 42. Second cross groove; 43. Guide groove; 44. Second screw;

[0039] 51. Bending groove. DETAILED DESCRIPTION

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the accompanying drawings.

[0041] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] Please refer to Figures 1 to 5 , an embodiment of the present invention provides a quick-change structure for a pipe bending machine mold, comprising:

[0043] The mold adapter 1 has a first vertical dovetail groove 11 on one side thereof in the X-axis direction, and a first horizontal beam 12 and a first vertical beam 13 are fixedly mounted on the side wall thereof away from the first dovetail groove 11;

[0044] The clamping die 2 is disposed on a side of the clamping die adapter 1 away from the first dovetail groove 11. One end of the clamping die 2 is provided with a first transverse groove 21 corresponding to the first transverse beam 12, a first vertical groove 22 corresponding to the first vertical beam 13, and the other end of the clamping die 2 is provided with a clamping groove 23.

[0045] The guide mold adapter 3 is arranged on one side of the clamping mold adapter 1 in the Y-axis direction. A second vertical dovetail groove 31 is formed on the side of the guide mold adapter 3 in the X-axis direction. A second horizontal beam 32 and a second vertical beam 33 are fixedly arranged on the side wall away from the second dovetail groove 31.

[0046] The guide mold 4 is arranged on a side of the guide mold adapter 3 away from the second dovetail groove 31, and has a second transverse groove 41 formed on one end thereof corresponding to the second transverse beam 32, a second vertical groove 42 formed on the second vertical beam 33, and a guide groove 43 formed on the other end thereof;

[0047] When the first horizontal beam 12 is inserted into the first horizontal groove 21 with clearance, and the first vertical beam 13 is inserted into the first vertical groove 22 with clearance, the clamping groove 23 on the clamping die 2 is aligned with the curved groove 51 on the wheel die 5 of the same specification; the clamping die 2 is fixedly connected to the clamping die adapter 1 by the first screw 24;

[0048] When the second horizontal beam 32 is loosely fitted into the second horizontal groove 41 and the second vertical beam 33 is loosely fitted into the second vertical groove 42 , the guide groove 43 on the guide mold 4 is aligned with the clamping groove 23 on the clamping mold 2 of the same specification; the guide mold 4 is fixedly connected to the guide mold adapter 3 by the second screw 44 .

[0049] In this embodiment, the clamping die adapter 1 is assembled to the pre-modified clamping die strip dovetail pressure plate of the pipe bender via the first dovetail groove 11 and is secured in place with screws. The guide die adapter 3 is assembled to the pre-modified guide die strip dovetail pressure plate of the pipe bender via the second dovetail groove 31 and is secured in place with screws. The clamping die adapter 1 and the guide die adapter 3 do not require height adjustment.

[0050] When replacing the pipe bending machine mold, the clamping mold 2 is positioned and assembled onto the clamping mold adapter 1 using the first transverse groove 21 and the first vertical groove 22, and secured with the first screw 24. The guide mold 4 is then positioned and assembled onto the guide mold adapter 3 using the second transverse groove 41 and the second vertical groove 42, and secured with the second screw 44. This enables rapid and precise replacement of the clamping mold 2 and the guide mold 4, reducing the mold change time from 1-4 hours to approximately 10 minutes, greatly improving mold replacement efficiency. Furthermore, the structure is an improvement on the original installation structure, reducing equipment modification costs and effectively improving operating efficiency with long-term use.

[0051] In a preferred embodiment, if Figure 2 and Figure 4As shown, a plurality of first screw holes 14 are evenly distributed on the clamping die adapter 1, avoiding the first horizontal beam 12 and the first vertical beam 13, for installing and fixing clamping dies 2 of different specifications;

[0052] A plurality of second screw holes 34 are evenly distributed on the guide mold adapter 3 , avoiding the second horizontal beam 32 and the second vertical beam 33 , for installing and fixing guide molds 4 of different specifications.

[0053] In this embodiment, the clamping mold adapter 1 or the guide mold adapter 3 that does not meet the specifications can open mounting holes at appropriate positions according to their own structures. The first screw 24 and the second screw 44 respectively pass through the mounting holes and are threadedly connected to the corresponding first screw hole 14 and the second screw hole 34, thereby meeting the installation and fixation of clamping molds 2 and guide molds 4 of different specifications and having good adaptability.

[0054] In a preferred embodiment, if Figure 2 and Figure 4 As shown, the first horizontal beam 12 and the first vertical beam 13 are integrally formed with the clamping die adapter 1; the second horizontal beam 32 and the second vertical beam 33 are integrally formed with the guide die adapter 3, with high structural strength and good positioning stability.

[0055] In a preferred embodiment, if Figure 2 and Figure 4 As shown, the clamping die adapter 1 is provided with two first cross beams 12 distributed vertically. The ends of the two first cross beams 12 away from the guide die adapter 3 are commonly connected to a first longitudinal connecting beam 15. The first longitudinal connecting beam 15 is integrally formed with the clamping die adapter 1, and has high structural strength and good supporting effect. It can effectively offset the weight of the clamping die 2 and has good structural stability.

[0056] Two second cross beams 32 distributed up and down are provided on the guide mold adapter 3. The two second cross beams 32 are connected to a second longitudinal connecting beam 33 at one end away from the clamping mold adapter 1. The second longitudinal connecting beam 33 is integrally formed with the guide mold adapter 3. It has high structural strength and good supporting effect. It can effectively offset the weight of the guide mold 4 and has good structural stability.

[0057] In a preferred embodiment, if Figure 2 and Figure 4 As shown, the first vertical beam 13 is a breakpoint structure to avoid the first horizontal beam 12; or the first horizontal beam 12 is a breakpoint structure to avoid the first vertical beam 13;

[0058] The second vertical beam 33 is a breakpoint structure to avoid the second horizontal beam 32 ; or the second horizontal beam 32 is a breakpoint structure to avoid the second vertical beam 33 .

[0059] In this embodiment, the breakpoint structure design can avoid tool rounding during machining center manufacturing and tool stepping caused by EDM corner cleaning, making processing convenient and satisfying structural strength requirements. Preferably, the vertical beam is a breakpoint structure, which only serves as a positioning function and does not need to bear the weight of the mold.

[0060] In addition, an embodiment of the present invention further provides a quick-changing method using the above-mentioned quick-changing structure of the pipe bending machine mold, comprising the following steps:

[0061] 1) Remove the original clamp 6, wheel die 5, clamp die 2 and guide die 4;

[0062] 2) Align the first transverse groove 21 and the first vertical groove 22 on the new clamping mold 2 with the first transverse beam 12 and the first vertical beam 13 on the clamping mold adapter 1, and securely connect the clamping mold 2 to the clamping mold adapter 1 using the first screw 24;

[0063] 3) Align the second transverse groove 41 and the second vertical groove 42 on the new guide mold 4 with the second transverse beam 32 and the second vertical beam 33 on the guide mold adapter 3, and fix the guide mold 4 to the guide mold adapter 3 using the second screw 44;

[0064] 4) Install new clamping sleeve 6 and wheel die 5.

[0065] In this embodiment, the clamp 6 is composed of 6 sector blocks with equal angles. By positioning the diameter and positioning the end face, it can be quickly positioned on the barrel of the pipe bending machine. Each part only needs one hexagon socket head screw to be fixed from the front of the barrel; the wheel mold is through the wheel mold flange surface, coaxial positioning hole, directional keyway and flat key of the pipe bending machine, and the new wheel mold can be quickly positioned. The wheel mold is fixed by 3-4 hexagon socket head screws to complete the installation.

[0066] The main reason why the replacement of the original mold structure takes a long time is the position adjustment of the clamping mold and the guide mold before the improvement. The improved clamping mold 2 and the guide mold 4 can be quickly installed through the positioning structure, which saves the time of position adjustment and greatly improves the efficiency of mold change.

[0067] In this specification, the terms "connect," "install," and "fix" should be understood broadly. For example, "connect" can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0068] Throughout this specification, terms such as "one embodiment" or "some embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0069] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A quick-change structure for a pipe bending machine mold, characterized in that: include: A clamping die adapter (1) is provided with a vertical first dovetail groove (11) on one side thereof in the X-axis direction, and a first horizontal beam (12) and a first vertical beam (13) are fixedly provided on the side wall thereof away from the first dovetail groove (11); A clamping die (2) is arranged on a side of the clamping die adapter (1) away from the first dovetail groove (11), one end of which is provided with a first transverse groove (21) corresponding to the first transverse beam (12), a first vertical groove (22) corresponding to the first vertical beam (13), and the other end of which is provided with a clamping groove (23); The guide mold adapter (3) is arranged on one side of the clamping mold adapter (1) in the Y-axis direction, and a second vertical dovetail groove (31) is provided on the side of the guide mold adapter (3) in the X-axis direction, and a second horizontal beam (32) and a second vertical beam (33) are fixedly provided on the side wall away from the second dovetail groove (31); A guide mold (4) is arranged on a side of the guide mold adapter (3) away from the second dovetail groove (31), one end of which is provided with a second transverse groove (41) corresponding to the second transverse beam (32), a second vertical groove (42) corresponding to the second vertical beam (33), and the other end of which is provided with a guide groove (43); Wherein, when the first horizontal beam (12) is loosely fitted into the first horizontal groove (21), and the first vertical beam (13) is loosely fitted into the first vertical groove (22), the clamping groove (23) on the clamping die (2) is aligned with the curved groove (51) on the wheel die (5) of the same specification; the clamping die (2) is fixedly connected to the clamping die adapter (1) by a first screw (24); When the second horizontal beam (32) is loosely fitted into the second horizontal groove (41), and the second vertical beam (33) is loosely fitted into the second vertical groove (42), the guide groove (43) on the guide mold (4) is aligned with the clamping groove (23) on the clamping mold (2) of the same specification; the guide mold (4) is fixedly connected to the guide mold adapter (3) by a second screw (44).

2. The quick-change structure for pipe bending machine mold according to claim 1, characterized in that: A plurality of first screw holes (14) are evenly distributed on the clamping die adapter (1) to avoid the first transverse beam (12) and the first vertical beam (13), and are used for installing and fixing the clamping dies (2) of different specifications; A plurality of second screw holes (34) are evenly distributed on the guide mold adapter (3) avoiding the second transverse beam (32) and the second vertical beam (33), and are used for installing and fixing the guide molds (4) of different specifications.

3. The quick-change structure for pipe bending machine mold according to claim 1, characterized in that: The first transverse beam (12) and the first vertical beam (13) are integrally formed with the clamping die adapter (1); the second transverse beam (32) and the second vertical beam (33) are integrally formed with the guide die adapter (3).

4. The quick-change structure for pipe bending machine mold according to any one of claims 1 or 3, characterized in that: The clamping die adapter (1) is provided with two first cross beams (12) distributed up and down, and one end of the two first cross beams (12) away from the guide die adapter (3) is commonly connected to a first longitudinal connecting beam (15), and the first longitudinal connecting beam (15) and the clamping die adapter (1) are integrally formed; The guide mold adapter (3) is provided with two second cross beams (32) distributed up and down, and one end of the two second cross beams (32) away from the clamping mold adapter (1) is commonly connected to a second longitudinal connecting beam (35), and the second longitudinal connecting beam (35) is integrally formed with the guide mold adapter (3).

5. The quick-change structure for pipe bending machine mold according to claim 1, characterized in that: The first vertical beam (13) is a breakpoint structure to avoid the first horizontal beam (12); or the first horizontal beam (12) is a breakpoint structure to avoid the first vertical beam (13); The second vertical beam (33) is a breakpoint structure to avoid the second crossbeam (32); or the second crossbeam (32) is a breakpoint structure to avoid the second vertical beam (33).

6. A quick-change method for a pipe bending machine mold quick-change structure according to any one of claims 1 to 5, characterized in that: The steps include: 1) Remove the original clamping cylinder (6), wheel die (5), clamping die (2) and guide die (4); 2) Align the first transverse groove (21) and the first vertical groove (22) on the new clamp (2) with the first transverse beam (12) and the first vertical beam (13) on the clamp adapter (1), respectively, and securely connect the clamp (2) to the clamp adapter (1) using a first screw (24); 3) Align the second transverse groove (41) and the second vertical groove (42) on the new guide mold (4) with the second transverse beam (32) and the second vertical beam (33) on the guide mold adapter (3), and fix the guide mold (4) to the guide mold adapter (3) by using a second screw (44); 4) Install the new collet (6) and wheel die (5).

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