Step pipe forming combined die
Through the design of the step tube forming combination mold, the step tube is extruded in one step, which solves the problems of low efficiency and high cost caused by multiple pass extrusion in the prior art, improves production efficiency and reduces the frequency of mold replacement.
Patent Information
- Application Number
- CN202420721142.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-09
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-04-09
AI Technical Summary
In the prior art, step tube forming requires multiple passes of extrusion, resulting in low production efficiency and frequent mold replacement, increasing manufacturing costs.
The step tube forming combination mold is adopted, including upper die seat, lower die seat, forming mold, clamping die and propulsion head. Through the combined sliding of the No. 1 forming module and No. 2 forming module, the step tube of different pipe diameters can be extruded at one time, reducing the mold replacement and processing process.
It realizes efficient forming of step pipes, reduces mold costs and improves production efficiency, and adapts to the needs of different pipe diameters and step lengths.
Smart Images
Figure CN223113844U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of stepped pipe forming dies, and particularly relates to a stepped pipe forming combined die. Background Technique
[0002] The lightweight, high-quality and low-cost of parts are the development trends of the manufacturing industry. Therefore, pipe parts are increasingly used in various fields such as aerospace, military, and transportation. The stepped pipe is a widely used pipe part, such as an automotive half shaft sleeve. Extrusion forming is a metal plastic forming method, which can achieve integral non-cutting processing. It is not only applicable to the production of pipe blanks, bars and profiles with simple shapes, but also applicable to the production of pipe parts with complex cross-sections.
[0003] At present, for the forming method of stepped pipes, seamless steel pipes of a certain size are selected and formed through multiple extrusion processes. The current forming dies can only extrude and process one pipe diameter at a time. Different dies need to be designed for the same pipe fitting, resulting in high manufacturing costs. And during the forming process of the stepped pipe, the dies need to be frequently replaced to extrude the pipe fitting, resulting in low production efficiency.
[0004] Therefore, the utility model provides a stepped pipe forming combined die, which can complete the forming of the stepped pipe at one time (extruding two pipe diameters at one time), without extruding the pipe fitting multiple times, reducing the processing procedures and improving the production efficiency. Content of the Utility Model
[0005] The technical solution adopted by the utility model is as follows: a stepped pipe forming combined die, including: an upper die base and a lower die base; further including: a forming die; a middle clamping die is fixedly installed on both the upper die base and the lower die base; the two middle clamping dies together form a fixing unit for fixing the pipe fitting.
[0006] There are two groups of the forming dies, which are respectively located on both sides of the fixing unit and are arranged oppositely; the forming die includes: a first forming module and a second forming module; the first forming module is fixedly connected to the second forming module, and both are slidably arranged between the upper die base and the lower die base.
[0007] Further, the forming die further includes: an adjustment module; the adjustment module is located between the first forming module and the second forming module and is fixedly connected to the first forming module and the second forming module.
[0008] Further, the forming die further includes: a pushing head; both the first forming module and the second forming module are fixedly connected to the pushing head; the adjustment module is located between the pushing head and the second forming module and is fixedly connected to the pushing head and the second forming module.
[0009] Furthermore, the middle clamping die includes: a clamping die outer ring and a clamping die inner ring; the clamping die outer ring is fixedly connected to the corresponding upper die base or lower die base;
[0010] The clamping die inner ring is fixedly installed inside the clamping die outer ring.
[0011] Furthermore, grooves are provided on the inner sides of both the upper die base and the lower die base; a protrusion is provided on the outer side of the clamping die outer ring, and the protrusion on the outer side is embedded into the groove on the upper die base or the lower die base.
[0012] Furthermore, the clamping die outer ring is fixedly connected to the corresponding upper die base or lower die base through two fixing covers; the two fixing covers are respectively located at both end faces of the clamping die outer ring.
[0013] Furthermore, at least two guiding grooves are fixedly installed at both ends of the lower die base respectively;
[0014] In each forming die, the pushing head or the second forming module or both the pushing head and the second forming module are fixedly installed with guide rails having the same number and corresponding positions as the guiding grooves at one end of the lower die base;
[0015] The forming die is slidably connected to the lower die base through the guide rails.
[0016] Furthermore, both the first forming module and the second forming module have different specifications and are selected according to the requirements of the stepped pipe.
[0017] Furthermore, the adjustment module has different specifications and is selected according to the requirements of the stepped pipe.
[0018] Furthermore, the clamping die inner ring has different specifications and is selected according to different pipe blanks.
[0019] Since the present utility model adopts the above technical solutions, the beneficial effects of the present utility model are as follows: the present utility model can complete the forming of the stepped pipe at one time through the first forming module and the second forming module. Compared with the prior art, there is no need to replace the die for secondary extrusion, reducing the processing procedures, thereby improving the production efficiency;
[0020] In addition, when the diameter of the pipe blank changes, only the clamping die inner ring needs to be replaced; and when the necking requirement of the stepped pipe changes, only the corresponding first forming module or the second forming module needs to be replaced. Compared with the prior art, there is no need to replace the whole set of dies, greatly reducing the die cost;
[0021] In addition, by replacing or freely combining the adjustment module, the distance between the first forming module and the second forming module is changed, thereby changing the stepped length of the stepped pipe, which also greatly reduces the mold cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a schematic front sectional view of the overall structure of the present utility model.
[0023] Figure 2 This is a schematic top sectional view of the overall structure of the present utility model.
[0024] Figure 3 This is a sectional view of the overall structure of the present utility model in the A-A direction with Figure 2 as the reference.
[0025] Reference numerals: pushing head - 1; first forming module - 3; adjustment module - 4; second forming module - 5; upper die base - 6; outer clamping die - 7; inner clamping die - 8; lower die base - 9; guide rail - 10; guide groove - 11; fixed cover plate - 12. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0026] Embodiment, as Figures 1-3 shown, a stepped pipe forming combined die includes: an upper die base 6 and a lower die base 9; it further includes: a forming die; middle clamping dies are fixedly installed on both the upper die base 6 and the lower die base 9; the two middle clamping dies together form a fixing unit for fixing the pipe fitting;
[0027] There are two groups of forming dies, which are respectively located on both sides of the fixing unit and are arranged oppositely; the forming die includes: a first forming module 3 and a second forming module 5; the first forming module 3 is fixedly connected to the second forming module 5 and both are slidably arranged between the upper die base 6 and the lower die base 9; the lower die base 9 is fixedly installed on the hydraulic platform of a three-way hydraulic press, the upper die base 6 is fixedly installed on the upper output end of the three-way hydraulic press, and the two forming dies are respectively fixedly connected to the output ends of the left and right ends of the three-way hydraulic press;
[0028] Place the pipe blank on the lower die base 9, start the output end at the upper end of the three-way hydraulic press, drive the upper die base 6 to move downward until the upper die base 6 and the lower die base 9 are closed, at this time the pipe blank is fixed by the two middle clamping dies; at the same time, start the output ends at the left and right ends of the three-way hydraulic press, drive the forming dies (the first forming module 3, the second forming module 5) to move simultaneously towards the middle of the pipe blank; the second forming module 5 is located in the direction close to the center of the pipe blank, and the first forming module 3 is located in the direction far from the center of the pipe blank;
[0029] During the process of the forming die moving towards the center of the tube blank, the second forming module 5 first comes into contact with the end of the tube blank and performs a first necking on the tube blank during the movement. After the first forming module 3 comes into contact with the end of the tube blank, the tube blank after the first necking is subjected to a second necking as it moves; thus, only one extrusion is required to complete the forming of the stepped tube.
[0030] Both the first forming module 3 and the second forming module 5 have different specifications and are selected according to the requirements of the stepped tube, so as to achieve different formed stepped tubes.
[0031] Specifically, in order to conveniently change the different formed stepped lengths, the forming die further includes: an adjustment module 4; the adjustment module 4 is located between the first forming module 3 and the second forming module 5 and is fixedly connected to the first forming module 3 and the second forming module 5; the adjustment module 4 has different specifications and is selected according to the requirements of the stepped tube; by replacing the adjustment module 4, the distance between the first forming module 3 and the second forming module 5 is changed, thereby changing the stepped length of the stepped tube after the tube blank is formed into a stepped tube.
[0032] The thicknesses of the adjustment modules 4 in the two sets of forming dies can be selected to be the same thickness or different thicknesses, so that the stepped lengths at both ends of the formed stepped tube are the same or different.
[0033] Specifically, in order to facilitate the advancement of extrusion and the replacement of the first forming module 3, the adjustment module 4, and the second forming module 5, the forming die further includes: a push head 1; both the first forming module 3 and the second forming module 5 are fixedly connected to the push head 1; the adjustment module 4 is located between the push head 1 and the second forming module 5 and is fixedly connected to the push head 1 and the second forming module 5; the forming module is fixedly connected to the output ends at both ends of the three-way hydraulic press through the push head 1; the first forming module 3 is fixedly installed on the push head 1 by bolts; the second forming module 5 is fixedly connected to the push head 1 by long bolts, and the long bolts pass through the adjustment module 4, so that the adjustment module 4 is squeezed and fixed between the second forming module 5 and the push head 1.
[0034] Specifically, in order to adapt to tube blanks of different diameters, the middle clamping die includes: a clamping die outer ring 7 and a clamping die inner ring 8; the clamping die outer ring 7 is fixedly connected to the corresponding upper die base 6 or lower die base 9; the clamping die inner ring 8 has different specifications and is selected according to different tube blanks.
[0035] The clamping die inner ring 8 is fixedly installed inside the clamping die outer ring 7; the clamping die inner ring 8 is fixedly connected to the clamping die outer ring 7 by bolts; when the diameter of the tube blank changes, only the clamping die inner ring 8 needs to be replaced.
[0036] In order to easily position the outer clamping die ring 7 between the upper die holder 6 and the lower die holder 9, grooves are provided on the inner sides of both the upper die holder 6 and the lower die holder 9; a protrusion is provided on the outer side of the outer clamping die ring 7, and the outer protrusion is inserted into the groove on the upper die holder 6 or the lower die holder 9;
[0037] The outer clamping die ring 7 is fixedly connected to the corresponding upper die holder 6 or lower die holder 9 through two fixed cover plates 12; the two fixed cover plates 12 are respectively located at both end faces of the outer clamping die ring 7; both the outer clamping die ring 7 and the inner clamping die ring 8 are semi-circular, and the fixed cover plates 12 are fixed to both the outer clamping die ring 7 and the upper die holder 6 or the lower die holder 9 by bolts;
[0038] Specifically, at least two guide grooves 11 are fixedly installed at both ends of the lower die holder 9;
[0039] In each forming die, the pushing head 1 or the second forming module 5 or both the pushing head 1 and the second forming module 5 are fixedly installed with guide rails 10 having the same number and corresponding positions as the guide grooves 11 at one end of the lower die holder 9; for the sake of clearly explaining this technical solution, in this embodiment, two guide grooves 11 are provided, and the guide rails 10 are fixedly connected to both the pushing head 1 and the second forming module 5 at the same time; the guide grooves 11 are fixedly connected to the lower die holder 9 by bolts, and both ends of the guide rails 10 are fixedly connected to the pushing head 1 and the second forming module 5 by bolts;
[0040] The forming die is slidably connected to the lower die holder 9 through the guide rails 10.
[0041] Specifically, in order to ensure that the upper die holder 6 and the lower die holder 9 can achieve precise die closing, one first hole is provided at each of a pair of diagonal corners of the upper die holder 6, and an interference fit connection is provided with a guide sleeve 13 in each first hole; one second hole is provided at each of a pair of diagonal corners of the lower die holder 9, and the position of the second hole corresponds to that of the first hole and is directly below the first hole; an interference fit connection is provided with a guide post 14 in each second hole, and each guide post 14 is provided with a clearance fit with the inner wall of the corresponding guide sleeve 13;
[0042] When the upper die holder 6 and the lower die holder 9 are closed, the guide post 14 is inserted into the corresponding guide sleeve 13, thereby ensuring that the upper die holder 6 and the lower die holder 9 can be accurately closed.
[0043] Working principle: Select a suitable inner clamping die ring 8 and outer clamping die ring 7 according to the diameter of the tube blank for fixation, align the two outer clamping die rings 7 with the upper die holder 6 and the lower die holder 9 respectively through the grooves on the upper die holder 6 and the lower die holder 9, and insert the protrusions on the outer clamping die ring 7 into the upper die holder 6 or the lower die holder 9, and then fixedly install the outer clamping die ring 7 and the corresponding upper die holder 6 and lower die holder 9 together through the fixed cover plates 12;
[0044] Fix the lower die base 9 on the three-way hydraulic press platform. According to the requirements of the stepped pipe to be formed, select the appropriate first forming module 3, adjustment module 4, and second forming module 5, and fixedly connect them to the push head 1. Then fixedly connect the guide rail 10 to the push head 1 and the second forming module 5, and insert it into the lower die base 9 through the guide groove 11 (According to the actual requirements of the stepped pipe, the first forming module 3, adjustment module 4, and second forming module 5 in the two sets of forming dies can all be selected with the same or different model specifications).
[0045] Align and close the upper die base 6 and the lower die base 9 through the guide sleeve 13 and the guide post 14. Fix the upper die base 6 to the output end at the upper end of the three-way hydraulic press, and fix the push heads 1 in the two sets of forming dies to the output ends at the left and right ends of the three-way hydraulic press respectively. Start the three-way hydraulic press, and the three output ends open outwards.
[0046] Place the pipe blank into the lower die base 9, and then start the three-way hydraulic press to drive the upper die base 6 to move downwards until it closes with the lower die base 9. At this time, the pipe blank is clamped and fixed by the inner circles 8 of the two clamping dies.
[0047] The three-way hydraulic press drives the two push heads 1 to move inwards simultaneously by a certain distance to compress and shape the pipe blank, forming the pipe blank into a stepped pipe, and realizing the primary extrusion forming of the stepped pipe through the first forming module 3 and the second forming module 5.
[0048] As mentioned above, it is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent replacements or changes, and should be covered within the protection scope of the present invention.
Claims
1. A stepped tube forming combined die, comprising: Upper die holder (6), lower die holder (9) and forming die; middle clamping dies are fixedly installed on both the upper die holder (6) and the lower die holder (9); the two middle clamping dies together form a fixing unit for fixing a pipe fitting; characterized in that: There are two groups of the forming dies, which are respectively located on both sides of the fixing unit and are arranged oppositely; the forming die includes: a first forming module (3) and a second forming module (5); the first forming module (3) is fixedly connected to the second forming module (5), and both are slidably arranged between the upper die holder (6) and the lower die holder (9).
2. The stepped tube forming combined die according to claim 1, wherein, The forming die further includes: an adjusting module (4); the adjusting module (4) is located between the first forming module (3) and the second forming module (5), and is fixedly connected to the first forming module (3) and the second forming module (5).
3. The stepped tube forming combined die according to claim 2, wherein, The forming die further includes: a pushing head (1); both the first forming module (3) and the second forming module (5) are fixedly connected to the pushing head (1); the adjusting module (4) is located between the pushing head (1) and the second forming module (5), and is fixedly connected to the pushing head (1) and the second forming module (5).
4. A stepped tube forming combined die according to claim 1, characterized in that, The middle clamping die includes: a clamping die outer ring (7) and a clamping die inner ring (8); the clamping die outer ring (7) is fixedly connected to the corresponding upper die holder (6) or lower die holder (9); The clamping die inner ring (8) is fixedly installed inside the clamping die outer ring (7).
5. The stepped tube forming combined die according to claim 4, characterized in that, Grooves are formed on the inner sides of both the upper die holder (6) and the lower die holder (9); the outer side of the clamping die outer ring (7) is provided with protrusions, and the outer protrusions are embedded into the grooves on the upper die holder (6) or the lower die holder (9).
6. The stepped tube forming combined die according to claim 5, characterized in that, The clamping die outer ring (7) is fixedly connected to the corresponding upper die holder (6) or lower die holder (9) through two fixing covers (12); the two fixing covers (12) are respectively located on both end faces of the clamping die outer ring (7).
7. The stepped tube forming combined die according to claim 3, characterized in that, At least two guiding grooves (11) are fixedly installed at both ends of the lower die holder (9) respectively; In each group of the forming dies, the pushing head (1) or the second forming module (5) or both the pushing head (1) and the second forming module (5) are fixedly installed with guide rails (10) that are equal in number and corresponding in position to the guiding grooves (11) at one end of the lower die holder (9); The forming die is slidably connected to the lower die holder (9) through the guide rails (10).
8. The stepped tube forming combined die according to claim 1, characterized in that, Both the first forming module (3) and the second forming module (5) have different specifications and are selected according to the requirements of the stepped pipe.
9. The stepped tube forming combined die according to claim 2, characterized in that, The adjusting module (4) has different specifications and is selected according to the requirements of the stepped pipe.
10. The stepped tube forming combined die according to claim 4, characterized in that, The clamping die inner ring (8) has different specifications and is selected according to different pipe blanks.