Pipe bending machine die quick change structure and quick change method

Abstract

The application discloses a bending machine die quick change structure and a quick change method, and the quick change structure comprises a die clamping adapter, one side of the die clamping adapter is provided with a first dovetail groove, and the other side of the die clamping adapter is provided with a first cross beam and a first vertical beam; a die is arranged on the side of the die clamping adapter far away from the die clamping adapter, one end of the die is provided with a first cross groove and a first vertical groove, and the other end of the die is provided with a clamping groove; a die guide adapter is arranged on one side of the die clamping adapter, one side of the die guide adapter is provided with a second dovetail groove, and the other side of the die guide adapter is provided with a second cross beam and a second vertical beam; and a die guide is arranged on one side of the die guide adapter, one end of the die guide is provided with a second cross groove and a second vertical groove, and the other end of the die guide is provided with a guide groove. The application realizes quick and accurate replacement of the die, and effectively improves die changing efficiency.

Description

Technical Field

[0001] This invention relates to the field of mold technology, and in particular to a quick-change structure and method for a pipe bending machine mold. Background Technology

[0002] Due to the characteristics of pipe bending machine dies, it is known that dies must be changed when processing pipe fittings of different diameters. Changing dies for different diameters requires replacing the entire set, including four parts: wheel die, clamping die, guide die, and clamping sleeve. When changing pipe bending dies, at least three major parts need to be replaced: the wheel die, clamping die, and guide die. The connection between the pipe bending machine and the wheel die has two structures: a vertical hole and a horizontal key, allowing for quick positioning followed by tightening with screws. The clamping sleeve is fixed with screws and can also be quickly replaced. However, the connection between the pipe bending machine and the clamping and guide dies is only a groove parallel to the direction of gravity on the right side. A strip-shaped dovetail pressure plate with the same width as the groove connects and presses the clamping and guide dies with the dovetail groove together.

[0003] To ensure the suitability of mold installation, the clamping mold and guide mold are movable in the direction of gravity during the installation of the pipe bending machine. This means that the clamping mold and guide mold need to be manually adjusted in height after each mold change. Each adjustment requires lifting the mold to prevent it from falling. Furthermore, some molds are quite heavy, requiring one person to lift the mold on the left side of the pipe bending machine while another person loosens or tightens the screws on the right side. This is very inconvenient. It usually takes two people 1-4 hours to complete a single mold change on the pipe bending machine (more than 90% of the time is wasted on installing the guide mold and clamping mold), resulting in low mold change efficiency. Summary of the Invention

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

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

[0006] The clamping mold adapter has a vertical first dovetail groove on one side in the X-axis direction, and a first horizontal beam and a first vertical beam are fixedly installed on the side wall away from the first dovetail groove.

[0007] A clamping mold is disposed on the side of the clamping mold adapter away from the first dovetail groove. One end of the mold has a first horizontal groove corresponding to the first horizontal beam and a first vertical groove corresponding to the first vertical beam. The other end of the mold has a clamping groove.

[0008] The guide mold adapter is located on one side of the clamping mold adapter in the Y-axis direction. A vertical second dovetail groove is provided on the side of the guide mold adapter located in the X-axis direction. 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 mold is disposed on the side of the guide mold adapter away from the second dovetail groove. One end of the guide mold has a second horizontal groove corresponding to the second crossbeam and a second vertical groove corresponding to the second vertical beam. The other end of the guide mold has a guide groove.

[0010] Wherein, when the first crossbeam is fitted into the first horizontal groove with a clearance fit, and the first vertical beam is fitted into the first vertical groove with a clearance fit, the clamping groove on the clamping mold is aligned with the bending groove on the wheel mold of the same specification; the clamping mold is fixedly connected to the clamping mold adapter seat by the first screw;

[0011] When the second crossbeam is fitted into the second horizontal groove with a clearance fit, and the second vertical beam is fitted into the second vertical groove with a clearance fit, 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 seat by the second screw.

[0012] Furthermore, the clamping mold adapter seat has several first screw holes evenly distributed around the first crossbeam and the first vertical beam for installing and fixing clamping molds of different specifications.

[0013] The guide mold adapter seat has several second screw holes evenly distributed around the second horizontal beam and the second vertical beam, which are used for the installation and fixing of guide molds of different specifications.

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

[0015] Furthermore, the clamping mold adapter is provided with two first crossbeams distributed vertically, and the ends of the two first crossbeams away from the guide mold adapter are connected to a first longitudinal connecting beam, which is integrally formed with the clamping mold adapter.

[0016] The guide mold adapter seat is provided with two second crossbeams distributed vertically. The ends of the two second crossbeams away from the clamping mold adapter seat are connected to a second longitudinal connecting beam. The second longitudinal connecting beam is integrally formed with the guide mold adapter seat.

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

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

[0019] Furthermore, the present invention also provides a quick-change method using the above-mentioned quick-change structure for pipe bending machine molds, comprising the following steps:

[0020] 1) Remove the original clamping cylinder, wheel mold, clamping mold, and guide mold;

[0021] 2) Align the first horizontal groove and the first vertical groove on the new clamping mold with the first horizontal beam and the first vertical beam on the clamping mold adapter, respectively, and fix the clamping mold to the clamping mold adapter with the first screw;

[0022] 3) Align the second horizontal groove and the second vertical groove on the new guide mold with the second horizontal beam and the second vertical beam on the guide mold adapter seat, respectively, and fix the guide mold to the guide mold adapter seat with the second screw;

[0023] 4) Install new clamps and wheel molds.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] This invention designs a clamping mold adapter seat and a guide mold adapter seat based on the original mold installation structure. They still use the original strip-shaped dovetail pressure plate connection method, and are installed onto the original clamping mold and guide mold connection points of the pipe bending machine in one go, permanently connecting them to the pipe bending machine without repeated disassembly and assembly. Simultaneously, the clamping mold and guide mold are improved. The positioning structure of the clamping mold adapter seat and the guide mold adapter seat is unique, although the positioning structure is not unique for different specifications of clamping molds and guide molds after the improvement. Based on the structural design of the matching wheel mold and the two adapter seats, it meets the requirements for rapid positioning and installation. Through the cooperation of horizontal and vertical grooves with horizontal and vertical beams, the clamping mold and guide mold are respectively positioned and installed on the clamping mold adapter seat and the guide mold adapter seat, achieving rapid and accurate positioning between the various structures of the mold. This saves the time spent on position adjustment during the original mold structure replacement process, enabling rapid and accurate mold replacement and effectively improving mold changing efficiency.

[0026] The other end of the adapter is designed with a universal interface structure for connecting the new type of clamping mold and the new type of guide mold. The interface structure of the adapter consists of a convex positioning crossbeam, a convex positioning longitudinal beam, and multiple threaded holes. The interface structure of the new type of clamping mold and the new type of guide mold consists of a concave positioning transverse groove, a longitudinal positioning longitudinal groove, and threaded through holes. The transverse and longitudinal beams enable different new types of clamping molds and guide molds to be positioned quickly and accurately, and they are clamped from the front with hexagonal head screws.

[0027] It should be understood that the description in the Summary of the Invention is not intended to limit the key or essential features of the embodiments of the present invention, nor is it intended to restrict the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

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

[0029] Figure 1 A schematic diagram of the quick-change mold structure for a pipe bending machine;

[0030] Figure 2 This is a schematic diagram of the mold clamping adapter.

[0031] Figure 3 This is a schematic diagram of the clamping mold structure;

[0032] Figure 4 This is a schematic diagram of the structure of the mold guide adapter.

[0033] Figure 5 This is a schematic diagram of the guide mold structure.

[0034] The diagram labels are: 1. Mold clamping adapter; 2. Mold clamp; 3. Mold guide adapter; 4. Mold guide; 5. Wheel mold; 6. Clamping cylinder;

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

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

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

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

[0039] 51. Bending groove. Detailed Implementation

[0040] The present invention will now be described in further detail 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 not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

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

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

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

[0045] The guide mold adapter 3 is located on one side of the clamping mold adapter 1 in the Y-axis direction. A vertical second dovetail groove 31 is provided 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 provided on the side wall away from the second dovetail groove 31.

[0046] The guide mold 4 is located on the side of the guide mold adapter 3 away from the second dovetail groove 31. One end of the guide mold 4 is provided with a second horizontal groove 41 corresponding to the second horizontal beam 32 and a second vertical groove 42 corresponding to the second vertical beam 33. The other end of the guide mold 4 is provided with a guide groove 43.

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

[0048] When the second horizontal beam 32 is fitted into the second horizontal groove 41 with clearance, and the second vertical beam 33 is fitted into the second vertical groove 42 with clearance, 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 mold adapter 1 is assembled onto the strip dovetail pressure plate on the pipe bending machine for installing the original clamping mold via the first dovetail groove 11, and is fixed in one go with screws; the guide mold adapter 3 is assembled onto the strip dovetail pressure plate on the pipe bending machine for installing the original guide mold via the second dovetail groove 31, and is fixed in one go with screws. The clamping mold adapter 1 and the guide mold adapter 3 do not require height adjustment.

[0050] When changing the pipe bending machine mold, the clamping mold 2 is positioned and assembled onto the clamping mold adapter 1 via the first horizontal groove 21 and the first vertical groove 22, and then fixed with the first screw 24; then the guide mold 4 is positioned and assembled onto the guide mold adapter 3 via the second horizontal groove 41 and the second vertical groove 42, and then fixed with the second screw 44. This enables rapid and accurate replacement of the clamping mold 2 and the guide mold 4, reducing the mold replacement time from 1-4 hours to about 10 minutes, greatly improving mold replacement efficiency. Furthermore, the structure is an improvement on the original installation structure, resulting in low equipment modification costs and effectively improving operational efficiency over long-term use.

[0051] In a preferred embodiment, such as Figure 2 and Figure 4As shown, the clamping mold adapter 1 has several first screw holes 14 evenly distributed on it, avoiding the first crossbeam 12 and the first vertical beam 13, for the installation and fixing of clamping molds 2 of different specifications.

[0052] The guide mold adapter 3 has several second screw holes 34 evenly distributed around the second crossbeam 32 and the second vertical beam 33, which are used for the installation and fixing of guide molds 4 of different specifications.

[0053] In this embodiment, the clamping mold adapter 1 or guide mold adapter 3 of different specifications can have mounting holes opened in appropriate positions according to their own structure. The first screw 24 and the second screw 44 pass through the mounting holes respectively and are threadedly connected to the corresponding first screw hole 14 and second screw hole 34, so as to meet the installation and fixation of clamping molds 2 and guide molds 4 of different specifications, and have good adaptability.

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

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

[0056] The guide mold adapter 3 is provided with two second crossbeams 32 distributed vertically. The ends of the two second crossbeams 32 away from the clamping mold adapter 1 are connected to a second longitudinal connecting beam 33. The second longitudinal connecting beam 33 is integrally formed with the guide mold adapter 3, which has high structural strength, good support effect, can effectively offset the weight of the guide mold 4, and has good structural stability.

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

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

[0059] In this embodiment, the breakpoint structure design avoids tool fillets during machining and tool-jointing steps caused by EDM corner clearing, facilitating machining while meeting structural strength requirements. Preferably, the vertical beam is a breakpoint structure, serving only a positioning function and not bearing the weight of the mold.

[0060] Furthermore, embodiments of the present invention also provide a quick-change method using the above-described quick-change structure for a pipe bending machine mold, comprising the following steps:

[0061] 1) Remove the original clamping cylinder 6, wheel mold 5, clamping mold 2, and guide mold 4;

[0062] 2) Align the first horizontal groove 21 and the first vertical groove 22 on the new clamping mold 2 with the first horizontal beam 12 and the first vertical beam 13 on the clamping mold adapter 1 respectively, and fix the clamping mold 2 to the clamping mold adapter 1 with the first screw 24.

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

[0064] 4) Install the new clamping cylinder 6 and wheel mold 5.

[0065] In this embodiment, the clamping cylinder 6 is composed of 6 sector-shaped blocks at equal angles. By using the positioning diameter and positioning end face, it can be quickly positioned onto the barrel of the pipe bending machine. Each part only needs to be fixed from the front of the barrel with one internal hexagonal head screw. The wheel mold can be quickly positioned by using the wheel mold flange face, coaxial positioning hole, directional keyway and flat key of the pipe bending machine. The installation is completed by fixing the wheel mold with 3-4 internal hexagonal head screws.

[0066] The original mold structure replacement took a long time mainly because of the adjustment of the positions of the clamping mold and guide mold before the improvement. The improved clamping mold 2 and guide mold 4 can be installed quickly through the positioning structure, saving the time of position adjustment and greatly improving the mold replacement efficiency.

[0067] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0068] In the description of this specification, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions 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 one or more embodiments or examples.

[0069] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

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

2. The quick-change structure for the pipe bending machine mold according to claim 1, characterized in that, The clamping mold adapter (1) has several first screw holes (14) evenly distributed around the first crossbeam (12) and the first vertical beam (13) for installing and fixing clamping molds (2) of different specifications. The guide mold adapter (3) has several second screw holes (34) evenly distributed around the second crossbeam (32) and the second vertical beam (33) for installing and fixing guide molds (4) of different specifications.

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

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

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

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

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