Pipe fitting stamping die

Abstract

The utility model discloses a pipe fitting stamping die, and relates to the technical field of ignition devices. According to the main technical scheme, the bending device comprises an upper die and a lower die, the lower die is arranged under the upper die, and a first bending mechanism, a second bending mechanism and a cutting mechanism are sequentially arranged between the lower die and the upper die according to the machining sequence; the first bending mechanism is used for conducting first-time bending machining on materials located in a machining area of the first bending mechanism. The second bending mechanism is used for carrying out second-time bending processing on the material which is located in the processing area of the second bending mechanism and is subjected to the first-time bending processing; the cutting mechanism is used for cutting the materials which are located in the cutting mechanism machining area and subjected to second-time bending machining. The purposes that continuous machining of the pipe fittings is achieved, the requirement for independent operation is reduced, and the production efficiency of the pipe fittings is improved are achieved. And meanwhile, the purposes that batch machining of the pipe fittings is facilitated, and then the effective efficiency is further improved are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe fitting manufacturing, and particularly relates to a pipe fitting stamping die. Background Art

[0002] A pipe fitting is a device used to fix or clamp a pipe, a hose or a similar tubular structure, and is usually processed and formed by a stamping die.

[0003] Currently, a stamping die generally includes an upper die base and a lower die base. The upper die base is located above the lower die base. An upper forming plate is installed on the lower surface of the upper die base, and an inner groove is formed on the upper forming plate. A lower forming plate is installed on the upper surface of the lower die base, and a protrusion matching with the inner groove is arranged on the lower forming plate.

[0004] During the production process of the pipe fitting, a staff member places an iron sheet strip on the lower forming plate. The upper die base presses down to drive the upper forming plate and the lower forming plate to cooperate, so that after the iron sheet strip is punched and grooved, the patch strip is pushed out of the stamping die and then taken to a bending device by hand for processing, thus completing the production of the pipe fitting. This greatly reduces the production efficiency of the pipe fitting. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a pipe fitting stamping die. By integrating processes such as the first bending process, the second bending process and the cutting process in the pipe fitting stamping die, the continuous processing of the pipe fitting is realized, and thus the need for separate operations is reduced to improve the production efficiency of the pipe fitting. At the same time, the batch processing of the pipe fitting is facilitated, and further the production efficiency is improved.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A pipe fitting stamping die includes an upper die and a lower die. The lower die is arranged directly below the upper die. A first bending mechanism, a second bending mechanism and a cutting mechanism are sequentially arranged between the lower die and the upper die according to the processing sequence. Among them, the first bending mechanism is used for performing the first bending process on the material located in the processing area of the first bending mechanism; the second bending mechanism is used for performing the second bending process on the material located in the processing area of the second bending mechanism and after the first bending process; the cutting mechanism is used for cutting the material located in the processing area of the cutting mechanism and after the second bending process.

[0008] A further solution is that: the first bending mechanism includes a first bending female die and a first bending male die; the first bending female die is arranged on the lower section of the upper die; a first bending groove is arranged at the lower end of the first bending female die; the first bending male die is arranged on the upper end surface of the lower die; the upper end surface of the first bending male die corresponds to the first bending groove.

[0009] A further solution is that: the upper end surface of the first bending male die includes a first inclined surface section, a first horizontal surface section and a second inclined surface section; the first horizontal surface section corresponds to the bottom of the first bending groove; both the first inclined surface section and the second inclined surface section are arranged below the first horizontal surface section; the first inclined surface section and the second inclined surface section are respectively connected to both sides of the first horizontal surface section; the first inclined surface section and the second inclined surface section gradually move away from each other along the direction from the upper die to the lower die; the first inclined surface section and the second inclined surface section respectively correspond to the two groove walls of the first bending groove.

[0010] A further solution is that: the first inclined surface section and the second inclined surface section are symmetrically distributed on both sides of the first horizontal surface section.

[0011] A further solution is that: an upwardly curved first arc surface section is arranged between the groove wall and the bottom of the first bending groove.

[0012] A further solution is that: a punching mechanism is also arranged between the lower die and the upper die; the punching mechanism is located on one side of the first bending mechanism away from the second bending mechanism, and the punching mechanism corresponds to the first horizontal surface section.

[0013] A further solution is that: the second bending mechanism includes a second bending male die and a second bending female die; the second bending male die is arranged on the lower end surface of the upper die; the second bending female die is arranged on the upper end surface of the lower die; a second bending groove is arranged on the upper end surface of the second bending female die; the second bending groove corresponds to the lower end surface of the second bending male die.

[0014] A further solution is that: the number of the second bending mechanisms is two; the two second bending mechanisms are arranged in sequence along the direction from one side of the lower die to the other side of the lower die; a bending gap is arranged between the two second bending mechanisms; the bending gap corresponds to the first horizontal surface section.

[0015] A further solution is that the lower end surface of the second bending punch includes a second horizontal plane section, a second arc surface section and a third arc surface section; the second horizontal plane section, the second arc surface section and the third arc surface section are arranged in sequence from the side where the two second bending punches are close to each other to the side where the two second bending punches are far from each other; both sides of the second arc surface section are respectively connected to the second horizontal plane section and the third arc surface section; the second arc surface section corresponds to the first arc surface section; the third arc surface section corresponds to the second bending groove.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] By integrating processes such as the first bending process, the second bending process and the cutting process in the pipe fitting stamping die, the continuous processing of the pipe fitting is realized, thereby reducing the need for separate operations and improving the production efficiency of the pipe fitting. At the same time, it is convenient to perform batch processing on the pipe fitting, thereby further improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a top view structural schematic diagram of a pipe fitting stamping die in this embodiment;

[0019] Figure 2 It is a front view structural schematic diagram of a pipe fitting stamping die in this embodiment;

[0020] Figure 3 It is a structural schematic diagram of a first bending mechanism for a pipe fitting stamping die in this embodiment;

[0021] Figure 4 It is a structural schematic diagram when the first bending mechanism for a pipe fitting stamping die in this embodiment performs the first bending on the material;

[0022] Figure 5 It is a structural schematic diagram of the material after the first bending of the pipe fitting stamping die in this embodiment;

[0023] Figure 6 It is a structural schematic diagram of a second bending mechanism for a pipe fitting stamping die in this embodiment;

[0024] Figure 7 It is a structural schematic diagram when the second bending mechanism for a pipe fitting stamping die in this embodiment performs the second bending on the material;

[0025] Figure 8 It is a structural schematic diagram of the material after the second bending of the pipe fitting stamping die in this embodiment.

[0026] Marks in the drawings and corresponding component names:

[0027] 1 - Upper die; 2 - Lower die;

[0028] 3 - First bending mechanism; 31 - First bending female die; 32 - First bending male die;

[0029] 4 - Second bending mechanism; 41 - Second bending male die; 42 - Second bending female die;

[0030] 5 - Cutting mechanism;

[0031] 6 - First bending groove; 7 - First inclined plane section; 8 - First horizontal plane section; 9 - Second inclined plane section; 10 - First arc section; 11 - Punching mechanism; 12 - Second bending groove; 13 - Bending gap; 14 - Second horizontal plane section; 15 - Second arc section; 16 - Third arc section. Detailed implementation mode

[0032] The present utility model will be further described below in conjunction with the accompanying drawings.

[0033] Embodiment 1

[0034] This embodiment provides a pipe fitting stamping die, as shown in Figure 1 and Figure 2 shown, including an upper die 1 and a lower die 2, the lower die 2 is arranged directly below the upper die 1, and a first bending mechanism 3, a second bending mechanism 4 and a cutting mechanism 5 are sequentially arranged between the lower die 2 and the upper die 1 according to the processing sequence; wherein, the first bending mechanism 3 is used for performing the first bending process on the material located in the processing area of the first bending mechanism 3; the second bending mechanism 4 is used for performing the second bending process on the material located in the processing area of the second bending mechanism 4 and after the first bending process; the cutting mechanism 5 is used for cutting the material located in the processing area of the cutting mechanism 5 and after the second bending process.

[0035] Exemplarily, in the implementation process, the specific structures and shapes of the upper die 1, the lower die 2 and the cutting mechanism 5 can refer to the existing patent document with the application number 202022619806.2, so no excessive elaboration will be made here.

[0036] The first bending mechanism 3, the second bending mechanism 4 and the cutting mechanism 5 are all installed between the upper die 1 and the lower die 2. And the first bending mechanism 3, the second bending mechanism 4 and the cutting mechanism 5 are sequentially arranged along the processing sequence.

[0037] During use, first install this pipe fitting stamping die on the punching press, and make the lower die 2 located directly below the upper die 1. So as to drive the upper die 1 to move up / down by the punching press, so as to achieve the purpose of closing / open the upper die 1 and the lower die 2.

[0038] Secondly, the punch drives the upper die 1 to move upward so that the upper die 1 and the lower die 2 are in the die-separated state. At this time, using existing conveying mechanisms such as conveyor belts and feeding belts, the material is conveyed along the first bending mechanism 3 towards the cutting mechanism 5 to convey the material that has not been processed by the first bending to the processing area of the first bending mechanism 3. When the punch drives the upper die 1 to move downward so that the upper die 1 and the lower die 2 are closed, the first bending mechanism 3 performs the first bending process on the material located in the processing area of the first bending mechanism 3 to obtain the material after the first bending process.

[0039] Next, after the material has been processed by the first bending process, the punch drives the upper die 1 to move upward so that the upper die 1 and the lower die 2 are in the die-separated state. At this time, using existing conveying mechanisms such as conveyor belts and feeding belts, the material is conveyed along the first bending mechanism 3 towards the cutting mechanism 5 to convey the material that has not been processed by the first bending to the processing area of the first bending mechanism 3, and at the same time convey the material after the first bending process to the processing area of the second bending mechanism 4. When the punch drives the upper die 1 to move downward so that the upper die 1 and the lower die 2 are closed, the first bending mechanism 3 performs the first bending process on the material located in the processing area of the first bending mechanism 3 to obtain the material after the first bending process, and at the same time the second bending mechanism 4 performs the second bending process on the material located in the processing area of the second bending mechanism 4 to obtain the material after the second bending process.

[0040] Finally, after the material has undergone the second bending process, the punch drives the upper die 1 to move upward, so that the upper die 1 and the lower die 2 are in a die-separated state. At this time, using existing conveying mechanisms such as conveyor belts and feeding belts, the material is conveyed along the first bending mechanism 3 towards the cutting mechanism 5, so as to convey the material that has not undergone the first bending process into the processing area of the first bending mechanism 3, while conveying the material that has undergone the first bending process into the processing area of the second bending mechanism 4, and conveying the material that has undergone the second bending process into the processing area of the cutting mechanism 5. When the punch drives the upper die 1 to move downward so that the upper die 1 and the lower die 2 are closed, the first bending mechanism 3 performs the first bending process on the material located in the processing area of the first bending mechanism 3 to obtain the material after the first bending process. At the same time, the second bending mechanism 4 performs the second bending process on the material located in the processing area of the second bending mechanism 4 to obtain the material after the second bending process, and the cutting mechanism 5 performs a cutting process on the material after the second bending process to obtain the formed pipe fitting. By integrating processes such as the first bending process, the second bending process, and the cutting process in this pipe fitting stamping die, the continuous processing of pipe fittings is achieved, thereby reducing the need for separate operations and improving the production efficiency of pipe fittings. At the same time, it is convenient to perform batch processing on pipe fittings, thereby further improving the production efficiency.

[0041] Embodiment 2

[0042] As Figure 3 shown, on the basis of the above-mentioned Embodiment 1, in this embodiment, the first bending mechanism 3 includes a first bending female die 31 and a first bending male die 32; the first bending female die 31 is arranged on the lower section of the upper die 1; a first bending groove 6 is arranged at the lower end of the first bending female die 31; the first bending male die 32 is arranged on the upper end surface of the lower die 2; the upper end surface of the first bending male die 32 corresponds to the first bending groove 6.

[0043] Exemplarily, during the implementation process, the above-mentioned first bending mechanism 3 includes a first bending female die 31 and a first bending male die 32. Among them, the first bending female die 31 is arranged on the lower end surface of the upper die 1 by means of welding fixation, screw connection fixation, etc., and a first bending groove 6 is formed on the lower end surface of the first bending female die 31. The first bending male die 32 is installed on the upper end surface of the lower die 2 by means of welding fixation, screw connection fixation, etc. The first bending male die 32 is located directly below the first bending female die 31, and the upper end surface of the first bending male die 32 is adapted to the first bending groove 6.

[0044] In use, the punch drives the upper die 1 to move upward so that the upper die 1 and the lower die 2 are in a die-separated state. At this time, using existing conveying mechanisms such as conveyor belts and feeding belts, the material is conveyed along the first bending mechanism 3 in the direction of the cutting mechanism 5 to convey the material that has not been processed by the first bending to between the first bending female die 31 and the first bending male die 32. When the punch drives the upper die 1 to move downward so that the upper die 1 and the lower die 2 are closed, the first bending male die 32 will squeeze the material that has not been processed by the first bending, so that the material deforms and fits the contour of the first bending groove 6, as Figure 4 shown. Thus, the material after the first bending process is obtained, as Figure 5 shown. Through the precise matching of the first bending groove 6 and the first bending male die 32, it can be ensured that the material obtains an accurate shape and angle in the first bending process, achieving the purpose of improving the precision of the finished product.

[0045] Embodiment 3

[0046] As Figure 3 shown, on the basis of the above Embodiment 2, in this embodiment, the upper end surface of the first bending male die 32 includes a first inclined surface section 7, a first horizontal surface section 8, and a second inclined surface section 9; the first horizontal surface section 8 corresponds to the bottom of the first bending groove 6; both the first inclined surface section 7 and the second inclined surface section 9 are arranged below the first horizontal surface section 8; the first inclined surface section 7 and the second inclined surface section 9 are respectively connected to both sides of the first horizontal surface section 8; the first inclined surface section 7 and the second inclined surface section 9 gradually move away from each other along the direction from the upper die 1 to the lower die 2; the first inclined surface section 7 and the second inclined surface section 9 respectively correspond to the two side walls of the first bending groove 6.

[0047] Exemplarily, in the implementation process, the upper end surface of the above first bending male die 32 includes a first inclined surface section 7, a first horizontal surface section 8, and a second inclined surface section 9.

[0048] The first horizontal surface section 8 corresponds to the bottom of the first bending groove 6.

[0049] The first inclined surface section 7 is arranged below the first horizontal surface section 8, and the first inclined surface section 7 is connected to one side of the first horizontal surface section 8. The side of the first inclined surface section 7 away from the first horizontal surface section 8 is connected to a side wall of the first bending male die 32, and the first inclined surface section 7 corresponds to a side wall of the first bending groove 6.

[0050] The second inclined surface section 9 is arranged below the first horizontal surface section 8, and the second inclined surface section 9 is connected to the other side of the first horizontal surface section 8. The side of the second inclined surface section 9 away from the first horizontal surface section 8 is connected to the other side wall of the first bending male die 32, and the second inclined surface section 9 corresponds to the other side wall of the first bending groove 6.

[0051] Wherein, the distance between the first inclined surface section 7 and the second inclined surface section 9 gradually increases along the direction from the upper die 1 to the lower die 2.

[0052] During use, the punch drives the upper die 1 to move upward so that the upper die 1 and the lower die 2 are in a mold-opening state. At this time, using existing conveying mechanisms such as conveyor belts and feeding belts, the material is conveyed along the first bending mechanism 3 towards the cutting mechanism 5 to convey the material that has not been processed by the first bending to between the first bending female die 31 and the first bending male die 32. When the punch drives the upper die 1 to move downward so that the upper die 1 and the lower die 2 are gradually closed, the first horizontal plane section 8 of the first bending male die 32 will first squeeze the material that has not been processed by the first bending. Then, the first inclined surface section 7 and the second inclined surface section 9 of the first bending male die 32 will deform the material and make it fit against the two side walls of the first bending female die 31. When the upper die 1 and the lower die 2 are closed, the first horizontal plane section 8 of the first bending male die 32 will squeeze the material against the bottom of the first bending groove 6, and the material after the first bending processing is obtained. At this time, the first horizontal plane section 8 forms a reserved fixing part on the material after the first bending processing. This achieves the purpose of facilitating the processing of fixing holes on the fixing part for subsequent fixing of pipe fittings.

[0053] Embodiment 4

[0054] As Figure 3 shown, on the basis of the above Embodiment 3, in this embodiment, the first inclined surface section 7 and the second inclined surface section 9 are symmetrically distributed on both sides of the first horizontal plane section 8.

[0055] Exemplarily, during implementation, the above first inclined surface section 7 and the second inclined surface section 9 are symmetrically arranged on both sides of the first horizontal plane section 8.

[0056] During use, when the punch drives the upper die 1 to move downward so that the upper die 1 and the lower die 2 are gradually closed, the first horizontal plane section 8 of the first bending male die 32 will first squeeze the material that has not been processed by the first bending. Then, the first inclined surface section 7 and the second inclined surface section 9 of the first bending male die 32 will deform the material and make it fit against the two side walls of the first bending female die 31. At this time, the symmetrically distributed first inclined surface section 7 and the second inclined surface section 9 effectively ensure the uniformity of the force on the material when it enters the first bending groove 6, achieving the risk of reducing the bending deviation caused by uneven force on one side. At the same time, it is ensured that after the second bending processing, two symmetrically distributed fixing grooves can be formed at both ends of the material fixing part. Furthermore, when fixing two pipes, two hoses or two devices of similar tubular structures by using the two fixing grooves on the pipe fitting later, the purpose of improving the stability between the two pipes, two hoses or two devices of similar tubular structures is achieved.

[0057] Embodiment 5

[0058] As Figure 3 shown, on the basis of the above-mentioned Embodiment 3 or Embodiment 4, in this embodiment, a first arc surface section 10 that bends upward is provided between the groove wall and the groove bottom of the first bending groove 6.

[0059] Exemplarily, during the implementation process, a first arc surface section 10 that bends upward is provided between the groove wall and the groove bottom of the first bending groove 6.

[0060] During use, when the punching press drives the upper die 1 to move downward so that the upper die 1 and the lower die 2 are gradually closed, the first horizontal plane section 8 of the first bending punch 32 will first extrude the material that has not been processed by the first bending. Then, the first inclined surface section 7 and the second inclined surface section 9 of the first bending punch 32 will deform the material and make it fit the two side walls of the first bending die 31. When the upper die 1 and the lower die 2 are closed, the first horizontal plane section 8 of the first bending punch 32 will extrude the material against the groove bottom of the first bending groove 6, and a smooth transition area will be formed at the position corresponding to the first arc surface section 10 of the material. This achieves the purpose of reducing the stress concentration that may be caused by sharp edges, thereby reducing the risk of material cracks and fractures, and improving the finished product rate and quality of the pipe fittings.

[0061] Embodiment 6

[0062] As Figure 1 shown, on the basis of the above-mentioned Embodiment 5, in this embodiment, a punching mechanism 11 is further provided between the lower die 2 and the upper die 1; the punching mechanism 11 is located on one side of the first bending mechanism 3 away from the second bending mechanism 4, and the punching mechanism 11 corresponds to the first horizontal plane section 8.

[0063] Exemplarily, during the implementation process, the punching mechanism 11 adopts the punching structure of an existing punching device, and no more details will be described here. The punching mechanism 11 is connected between the upper die 1 and the lower die 2 by means of welding fixation, screw connection, etc. The punching mechanism 11 is arranged on one side of the first bending mechanism 3 away from the second bending mechanism 4, and the punching mechanism 11 corresponds to the first horizontal plane section 8 of the first bending punch 32.

[0064] In use, before the first bending process of the material, the material is first punched. The punching machine drives the upper die 1 to move upward so that the upper die 1 and the lower die 2 are in a die-separated state. At this time, using existing conveying mechanisms such as conveyor belts and feeding belts, the material is conveyed along the first bending mechanism 3 towards the cutting mechanism 5 to convey the material that has not been processed by the punching mechanism 11 into the processing area of the punching mechanism 11. When the punching machine drives the upper die 1 to move downward so that the upper die 1 and the lower die 2 are closed, the punching mechanism 11 punches the material located in the processing area of the punching mechanism 11 to obtain the material after punching processing. At this time, a fixing hole is formed on the material after punching processing, and the fixing hole is located on the fixing part of the material corresponding to the first horizontal plane section 8. This achieves the purpose of facilitating subsequent fixing of the pipe fitting from the fixing hole on the fixing part of the pipe fitting.

[0065] Embodiment 7

[0066] As Figure 6 shown, on the basis of the above Embodiment 6, in this embodiment, the second bending mechanism 4 includes a second bending punch 41 and a second bending die 42; the second bending punch 41 is arranged on the lower end surface of the upper die 1; the second bending die 42 is arranged on the upper end surface of the lower die 2; a second bending groove 12 is arranged on the upper end surface of the second bending die 42; the second bending groove 12 corresponds to the lower end surface of the second bending punch 41.

[0067] Exemplarily, during the implementation process, the second bending mechanism 4 includes a second bending punch 41 and a second bending die 42. Among them, the second bending punch 41 is arranged on the lower end surface of the upper die 1 by means of welding fixation, screw fixation, etc. The second bending die 42 is arranged on the upper end surface of the lower die 2 by means of welding fixation, screw fixation, etc. The second bending die 42 is located directly below the second bending punch 41, and a second bending groove 12 is formed on the upper end of the second bending die 42, and the second bending groove 12 corresponds to the lower end surface of the second bending punch 41.

[0068] In use, the punching machine drives the upper die 1 to move upward so that the upper die 1 and the lower die 2 are in a die-separated state. At this time, using existing conveying mechanisms such as conveyor belts and feeding belts, the material is conveyed along the first bending mechanism 3 towards the cutting mechanism 5 to convey the material that has been processed by the first bending process between the second bending die 42 and the second bending punch 41. When the punching machine drives the upper die 1 to move downward so that the upper die 1 and the lower die 2 are closed, the second bending punch 41 will squeeze the material that has been processed by the first bending process, so that the material deforms and fits the contour of the second bending groove 12, as Figure 7 shown. Thus, the material after the second bending process is obtained, as Figure 8As shown, fixing grooves are formed on the material after the second bending process. Through the precise matching of the second bending groove 12 and the second bending punch 41, it can ensure that the material obtains an accurate shape and angle during the second bending process, achieving the purpose of improving the precision of the finished product.

[0069] Embodiment 8

[0070] As Figure 2 shown, on the basis of the above Embodiment 7, in this embodiment, the number of the second bending mechanisms 4 is set to two; the two second bending mechanisms 4 are sequentially arranged along one side of the lower die 2 to the other side of the lower die 2; a bending gap 13 is arranged between the two second bending mechanisms 4; the bending gap 13 corresponds to the first horizontal plane section 8.

[0071] Exemplarily, during the implementation process, the number of the second bending mechanisms 4 is set to two. The two second bending mechanisms 4 are sequentially arranged along one side of the lower die 2 to the other side of the lower die 2, and a certain bending gap 13 is left between the two second bending mechanisms 4. The bending gap 13 corresponds to the first horizontal plane section 8 of the first bending punch 32.

[0072] During use, when the punch drives the upper die 1 to move downward so that the upper die 1 and the lower die 2 are closed, the two second bending punches 41 will squeeze both ends of the material processed by the first bending process, causing both ends of the material to deform and fit the contour of the corresponding second bending groove 12. Thus, the material after the second bending process is obtained. At this time, two fixing grooves are formed on the material after the second bending process. It achieves the purpose of facilitating the subsequent fixation of two pipes, two hoses or two similar tubular structure devices by using pipe fittings. At the same time, when the punch drives the upper die 1 to move downward so that the upper die 1 and the lower die 2 are closed, the fixing part on the material will gradually fall into the bending gap 13, achieving the purpose of reducing the risk of machining the fixing holes on the fixing part to maintain the integrity of the fixing holes on the fixing part.

[0073] Embodiment 9

[0074] As Figure 6 shown, on the basis of the above Embodiment 8, in this embodiment, the lower end surface of the second bending punch 41 includes a second horizontal plane section 14, a second arc surface section 15 and a third arc surface section 16; the second horizontal plane section 14, the second arc surface section 15 and the third arc surface section 16 are sequentially arranged along the side where the two second bending punches 41 are close to each other to the side where the two second bending punches 41 are far from each other; both sides of the second arc surface section 15 are respectively connected to the second horizontal plane section 14 and the third arc surface section 16; the second arc surface section 15 corresponds to the first arc surface section 10; the third arc surface section 16 corresponds to the second bending groove 12.

[0075] Exemplarily, during implementation, the lower end surface of the second bending punch 41 includes a second horizontal plane section 14, a second arc surface section 15, and a third arc surface section 16. The second horizontal plane section 14, the second arc surface section 15, and the third arc surface section 16 are arranged in sequence from the side where the two second bending punches 41 are close to each other to the side where the two second bending punches 41 are far from each other.

[0076] Wherein, both sides of the second arc surface section 15 are respectively connected to the second horizontal plane section 14 and the third arc surface section 16, and the second arc surface section 15 corresponds to the first arc surface section 10, that is to say, the shape of the second picture section is the same as the shape of the first arc surface section 10. It provides a smooth transition when the material enters the second bending die 42, achieving the purpose of reducing stress concentration and reducing the risk of crack appearance. One side of the second horizontal plane section 14 far from the second arc surface section 15 is connected to the side wall of the second bending punch 41. The third arc surface section 16 is located in the middle of the second bending punch 41, the third arc surface section 16 corresponds to the second bending die 42, and the third arc surface section 16 is the main contact plane during the material bending process, used to apply a vertical pressure, achieving the purpose of helping the material to fit with the groove wall of the second bending groove 12 and ensuring the smoothness and accuracy during the bending process.

[0077] Although the present invention has been described herein with reference to multiple illustrative embodiments of the present invention, it should be understood that those skilled in the art can design many other modifications and implementation manners, and these modifications and implementation manners will fall within the scope of the principles and spirit disclosed in this application. More specifically, within the scope of the disclosure, drawings, and claims of this application, various variations and improvements can be made to the components and / or layout of the subject combination layout. In addition to the variations and improvements made to the components and / or layout, other uses will also be obvious to those skilled in the art.

Claims

1. A pipe stamping die, characterized in that: include: Upper mold (1), A lower mold (2), the lower mold (2) being arranged directly below the upper mold (1), and a first bending mechanism (3), a second bending mechanism (4) and a cutting mechanism (5) being arranged in sequence between the lower mold (2) and the upper mold (1) in a processing order; The first bending mechanism (3) is used to perform a first bending process on the material located in the processing area of ​​the first bending mechanism (3); the second bending mechanism (4) is used to perform a second bending process on the material located in the processing area of ​​the second bending mechanism (4) and after the first bending process; and the cutting mechanism (5) is used to cut the material located in the processing area of ​​the cutting mechanism (5) and after the second bending process.

2. The pipe fitting stamping die according to claim 1, characterized in that: The first bending mechanism (3) comprises a first bending female die (31) and a first bending male die (32); The first bending die (31) is arranged on the lower section of the upper die (1); A first bending groove (6) is provided at the lower end of the first bending die (31); The first bending convex mold (32) is arranged on the upper end surface of the lower mold (2); The upper end surface of the first bending punch (32) corresponds to the first bending groove (6).

3. The pipe punching die according to claim 2, characterized in that: The upper end surface of the first bending punch (32) comprises a first inclined surface segment (7), a first horizontal surface segment (8) and a second inclined surface segment (9); The first horizontal surface segment (8) corresponds to the bottom of the first bending groove (6); The first inclined surface section (7) and the second inclined surface section (9) are both arranged below the first horizontal surface section (8); The first inclined surface segment (7) and the second inclined surface segment (9) are respectively connected to two sides of the first horizontal surface segment (8); The first inclined surface segment (7) and the second inclined surface segment (9) gradually move away from each other along the direction from the upper mold (1) to the lower mold (2); The first inclined surface section (7) and the second inclined surface section (9) respectively correspond to two groove walls of the first bending groove (6).

4. The pipe punching die according to claim 3, characterized in that: The first inclined surface segment (7) and the second inclined surface segment (9) are symmetrically distributed on both sides of the first horizontal surface segment (8).

5. The pipe punching die according to claim 3 or 4, characterized in that: A first curved surface segment (10) that bends upward is provided between the groove wall and the groove bottom of the first bending groove (6).

6. The pipe punching die according to claim 5, characterized in that: A punching mechanism (11) is also provided between the lower mold (2) and the upper mold (1); The punching mechanism (11) is located on a side of the first bending mechanism (3) away from the second bending mechanism (4), and the punching mechanism (11) corresponds to the first horizontal surface segment (8).

7. The pipe punching die according to claim 6, characterized in that: The second bending mechanism (4) comprises a second bending convex die (41) and a second bending concave die (42); The second bending convex mold (41) is arranged on the lower end surface of the upper mold (1); The second bending die (42) is arranged on the upper end surface of the lower die (2); The upper end surface of the second bending die (42) is provided with a second bending groove (12); The second bending groove (12) corresponds to the lower end surface of the second bending punch (41).

8. The pipe punching die according to claim 7, characterized in that: The number of the second bending mechanisms (4) is two; The two second bending mechanisms (4) are arranged in sequence along one side of the lower mold (2) toward the other side of the lower mold (2); A bending gap (13) is provided between the two second bending mechanisms (4); The bending gap (13) corresponds to the first horizontal surface segment (8).

9. The pipe punching die according to claim 8, characterized in that: The lower end surface of the second bending punch (41) comprises a second horizontal surface segment (14), a second arc surface segment (15) and a third arc surface segment (16); The second horizontal surface segment (14), the second arc surface segment (15) and the third arc surface segment (16) are sequentially arranged along a side where the two second bending convex dies (41) are close to each other to a side where the two second bending convex dies (41) are far away from each other; The second arc surface segment (15) is connected to the second horizontal surface segment (14) and the third arc surface segment (16) at two sides respectively; The second arc surface segment (15) corresponds to the first arc surface segment (10); The third arc surface segment (16) corresponds to the second bending groove (12).

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