Pipe fitting head expanding device
By designing a pipe expansion device with a clamping mold and a positioning mechanism, the adaptability problem of pipe expansion devices of various lengths in the existing technology has been solved, and the stability and cost-effectiveness have been improved.
Patent Information
- Application Number
- CN202423178626.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-23
AI Technical Summary
In the existing technology, pipe expansion devices are difficult to adapt to pipes of various lengths, requiring frequent changes of clamping equipment, resulting in high production costs and unstable expansion accuracy.
A pipe fitting flaring device was designed, which adopts a clamping die, a flaring punch and a positioning mechanism. The flaring punch is driven by a hydraulic cylinder, and combined with adjustable stops and fixing plates, it can achieve stable clamping and flaring operations for pipe fittings of various lengths.
It enables stable expansion of pipe fittings of various lengths, reduces equipment replacement frequency, lowers production costs, and improves expansion accuracy and stability.
Smart Images
Figure CN223642642U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of pipe fitting processing technology, and is particularly related to a pipe fitting expansion device. Background Technology
[0002] Gas meter connectors are mainly used for connecting the front bend, back bend, and other parts of the meter. The forming of gas meter connectors typically requires first flaring the end of the pipe fitting, and then pressing a plate at the opening to form a boss and interface. Currently, flaring pipe fittings involves clamping the fitting with a clamping device and then stamping the end with a die to complete the flaring. Because the fitting is subjected to significant thrust during the stamping process, if the clamping force is too weak, the fitting may be pushed during stamping, affecting the flaring accuracy. If the clamping force is too strong, the fitting may deform. The current solution is to install a stop at one end of the clamping device to prevent the fitting from moving. However, this method only accommodates pipes of a certain length for flaring; if flaring other lengths is required, the clamping device needs to be changed. Therefore, improvement is necessary. Utility Model Content
[0003] To address the aforementioned deficiencies in the prior art, this application provides a pipe fitting expansion device that can accommodate pipe fittings of various lengths without requiring the replacement of clamping equipment when switching the type of pipe fitting for expansion.
[0004] To achieve the above objectives, the present invention employs the following technology:
[0005] A pipe fitting flaring device, comprising:
[0006] The clamping mold includes an upper mold and a lower mold that are symmetrical to each other. The top of the upper mold is connected to the telescopic end of a pressing mechanism. The bottom of the upper mold is provided with a first arc-shaped groove that matches the shape of the tube to be clamped. Both ends of the first arc-shaped groove penetrate the side of the upper mold. The top of the lower mold is provided with a second arc-shaped groove that is symmetrical to the first arc-shaped groove.
[0007] A flaring die is coaxially spaced at one end of the second arc-shaped groove. The flaring die is connected to the movable end of a hydraulic cylinder, and the moving direction of the movable end of the hydraulic cylinder is the same as the axial direction of the second arc-shaped groove.
[0008] The positioning mechanism includes a stop block and a fixing plate. The fixing plate is spaced apart at the end of the second arc-shaped groove away from the flaring die. The length direction of the fixing plate is parallel to the axial direction of the second arc-shaped groove. The top of the fixing plate has multiple threaded holes along the length direction. The stop block is connected to the threaded holes by screws and is used to block the end of the pipe fitting to be pressed placed in the second arc-shaped groove.
[0009] Furthermore, the lower mold is positioned above a fixed base, which has multiple first limiting posts. The lower mold has multiple vertical first through holes, and the multiple first limiting posts pass through the multiple vertical first through holes. The top of the first limiting posts protrudes from the top of the lower mold. The bottom of the upper mold has multiple connecting holes with the same axial direction as the first through holes. When the upper mold and the lower mold are closed, the upper end of the first limiting post is in the connecting hole.
[0010] Furthermore, a support block is provided on the side of the stop block facing the second arc-shaped groove, and a third arc-shaped groove with the same axial direction and diameter as the second arc-shaped groove is provided on the top of the support block.
[0011] Furthermore, a U-shaped slide rail is provided on the top of the fixed plate along the length direction, and the bottom of the stop block is slidably connected to the U-shaped slide rail by a slider. The U-shaped slide rail is provided with multiple second through holes that communicate with the threaded holes.
[0012] Furthermore, the inner sides of the two vertical sections of the U-shaped slide rail are provided with grooves along the length direction. The slider includes a sliding plate and a T-shaped block vertically disposed above the sliding plate. The sliding plate is slidably disposed between the two grooves, and the stop block is fixed to the top of the T-shaped block.
[0013] Furthermore, a connecting plate is provided at one end of the sliding plate. The top surface of the connecting plate protrudes from the top of the U-shaped slide rail, and a third through hole is provided on the connecting plate for connecting screws.
[0014] The beneficial effects of this utility model are as follows:
[0015] 1. This device can accommodate the expansion of pipes of various lengths without requiring the replacement of clamping equipment when switching between different types of pipes to be expanded, thus effectively reducing production equipment costs.
[0016] 2. When it is necessary to change the type of pipe fitting with the expanded head, remove the screw, slide the stop block to the preset position, and then connect the screw to the corresponding threaded hole. Because the top surface of the connecting plate protrudes from the top of the U-shaped slide rail, the wrench can be prevented from being blocked by the U-shaped slide rail when unscrewing the screw.
[0017] 3. This connection method is stable and reliable, and will not cause relative slippage due to large forces, thus affecting the positioning accuracy and the size after tube expansion.
[0018] 4. This device is inexpensive and efficient, and can reduce costs and increase efficiency. Attached Figure Description
[0019] Figure 1 This is a perspective view of the overall structure of the device according to an embodiment of this application.
[0020] Figure 2 for Figure 1 Enlarged view of section A in the middle.
[0021] Figure 3 This is a perspective view of the structure in the device according to an embodiment of this application, where the upper and lower molds are separated.
[0022] Figure 4 This is an exploded view of a portion of the structure of the device according to an embodiment of this application.
[0023] Figure 5 This is an exploded view of a portion of the structure of the device according to an embodiment of this application.
[0024] Figure 6 This is a perspective view of another part of the structure of the device according to an embodiment of this application.
[0025] Figure 7 for Figure 6 Enlarged view of section B in the middle.
[0026] Reference numerals: Upper die-1, Lower die-2, Flaring die-3, Stop block-4, Fixing plate-5, Fixing base-6, U-shaped slide rail-7, Sliding plate-8, Pipe fitting-9, First arc groove-101, Connecting hole-102, Pressing mechanism-103, Limiting hole-104. Second arc groove-201, First through hole-202, Second limiting post-203, Hydraulic cylinder-301, First limiting post-601, Support block-401, Third arc groove-4011, Second through hole-701, Slide groove-702, T-block-801, Connecting plate-802, Screw-10. Detailed Implementation
[0027] To make the objectives, technical solutions and advantages of the present utility model clearer, the implementation methods of the present utility model will be described in detail below with reference to the accompanying drawings. However, the embodiments described in the present utility model are only some embodiments of the present utility model, and not all embodiments.
[0028] This application provides a pipe expansion device, such as... Figures 1-7 As shown, it includes a clamping die, a flaring die 3, a positioning mechanism, etc.
[0029] Specifically, the clamping mold includes an upper mold 1 and a lower mold 2 that are symmetrical to each other. The top of the upper mold 1 is connected to the telescopic end of a pressing mechanism 103. The bottom of the upper mold 1 is provided with a first arc-shaped groove 101 that matches the shape of the tube 9 to be clamped. Both ends of the first arc-shaped groove 101 penetrate the side of the upper mold 1. The top of the lower mold 2 is provided with a second arc-shaped groove 201 that is symmetrical to the first arc-shaped groove 101. The flaring die 3 is coaxially spaced at one end of the second arc-shaped groove 201. The flaring die 3 is connected to the movable end of a hydraulic cylinder 301. The moving direction of the movable end of the hydraulic cylinder 301 is the same as the axial direction of the second arc-shaped groove 201. Specifically, the external dimensions of the flaring die 3, especially the front taper dimension, have a significant impact on the subsequent dimensions after forming. Through multiple experiments and improvements, it is better for the tapered surface length after tube expansion to be ≥8mm. The corresponding tapered surface of the front end of the flaring die 3 is set to match the tapered surface dimension of the flared end of the tube after tube expansion. The positioning mechanism includes a stop block 4 and a fixing plate 5. The fixing plate 5 is spaced apart at one end of the second arc groove 201 away from the flaring die 3. The length direction of the fixing plate 5 is parallel to the axial direction of the second arc groove 201. The top of the fixing plate 5 is provided with multiple threaded holes along the length direction. The stop block 4 is connected to the threaded holes by screws 10 and is used to block the end of the pipe fitting 9 to be pressed placed in the second arc groove 201.
[0030] In actual use, the pipe fitting 9 to be flared is placed into the second arc-shaped groove 201, with one end of the pipe fitting 9 abutting against the stop block 4. Then, the pressing mechanism 103 is controlled to move the upper die 1 downward, causing the upper die 1 and lower die 2 to close and press the pipe fitting 9 tightly. Next, the hydraulic cylinder 301 is controlled to move the flaring punch 3 toward the pipe fitting 9 to complete the flaring. When it is necessary to change the type of the flared pipe fitting 9, the screw 10 is unscrewed, and the stop block 4 is fixed to the corresponding threaded hole, which can effectively reduce the equipment cost of production.
[0031] In one implementation, see [reference] Figures 3-5 The lower mold 2 is positioned above a fixed base 6. The fixed base 6 has multiple first limiting posts 601. The lower mold 2 has multiple vertical first through holes 202, and the multiple first limiting posts 601 pass through these holes, with their tops protruding from the top of the lower mold 2. The upper mold 1 has multiple connecting holes 102 at its bottom, aligned axially with the first through holes 202. When the upper mold 1 and lower mold 2 are closed, the upper ends of the first limiting posts 601 are positioned within the connecting holes 102. The first limiting posts 601 can fix the lower mold 2 and also limit the upper mold 1, improving stability during the downward closing process. In another embodiment, see [reference needed]. Figure 4 , Figure 5The lower mold 2 is provided with multiple second limiting posts 203 above it, and the upper mold is provided with multiple limiting holes 104 corresponding to the second limiting posts 203 at the bottom. When the upper mold 1 rises to the maximum limit, the second limiting posts 203 are in the limiting holes 104, which is used to further improve the stability of the upper mold 1 and the lower mold 2 during the closing process and prevent the upper mold 1 from shifting.
[0032] For details, please refer to Figure 6 A support block 401 is provided on the side of the stop block 4 facing the second arc-shaped groove 201. The top of the support block 401 is provided with a third arc-shaped groove 4011 that has the same axial direction and diameter as the second arc-shaped groove 201. When placing the pipe fitting 9, one end of the pipe fitting 9 can be placed into the third arc-shaped groove 4011 and the second arc-shaped groove 201 to further improve the stability during the stamping process.
[0033] Preferred options, please refer to Figure 6 , Figure 7 The top of the fixing plate 5 is provided with a U-shaped slide rail 7 along its length. The bottom of the stop block 4 is slidably connected to the U-shaped slide rail 7 via a slider. The U-shaped slide rail 7 has multiple second through holes 701 that communicate with the threaded holes. When it is necessary to change the type of pipe fitting 9 with the expanded head, remove the screw 10, slide the stop block 4 to the predetermined position, and then connect the screw 10 to the corresponding threaded hole.
[0034] For details, please refer to Figure 6 , Figure 7 The inner sides of the two vertical sections of the U-shaped slide rail 7 are provided with grooves 702 along the length direction. The slider includes a sliding plate 8 and a T-shaped block 801 vertically disposed above the sliding plate 8. The sliding plate 8 is slidably disposed between the two grooves 702, and the stop block 4 is fixed to the top of the T-shaped block 801. More specifically, one end of the sliding plate 8 is provided with a connecting plate 802. The top surface of the connecting plate 802 protrudes from the top of the U-shaped slide rail 7, and a third through hole is provided on the connecting plate 802 for connecting the screw 10. Because the top surface of the connecting plate 802 protrudes from the top of the U-shaped slide rail 7, the wrench can be prevented from being blocked by the U-shaped slide rail 7 when the screw 10 is unscrewed.
[0035] The above are only some of the embodiments listed in this application and are not intended to limit this application.
Claims
1. A pipe fitting expansion device, characterized in that, include: The clamping mold includes an upper mold (1) and a lower mold (2) that are symmetrical to each other. The top of the upper mold (1) is connected to the telescopic end of a pressing mechanism (103). The bottom of the upper mold (1) is provided with a first arc groove (101) that matches the shape of the tube (9) to be clamped. Both ends of the first arc groove (101) penetrate the side of the upper mold (1). The top of the lower mold (2) is provided with a second arc groove (201) that is symmetrical to the first arc groove (101). The flaring die (3) is coaxially spaced at one end of the second arc groove (201). The flaring die (3) is connected to the movable end of a hydraulic cylinder (301). The moving direction of the movable end of the hydraulic cylinder (301) is the same as the axial direction of the second arc groove (201). The positioning mechanism includes a stop (4) and a fixing plate (5). The fixing plate (5) is spaced apart at one end of the second arc groove (201) away from the flaring die (3). The length direction of the fixing plate (5) is parallel to the axial direction of the second arc groove (201). The top of the fixing plate (5) is provided with multiple threaded holes along the length direction. The stop (4) is connected to the threaded holes by screws (10) to block the end of the pipe fitting (9) to be pressed in the second arc groove (201).
2. The pipe fitting expansion device according to claim 1, characterized in that, The lower mold (2) is located above a fixed base (6). The fixed base (6) is provided with multiple first limiting posts (601). The lower mold (2) is provided with multiple vertical first through holes (202). The multiple first limiting posts (601) pass through the multiple vertical first through holes (202), and the top of the first limiting post (601) protrudes from the top of the lower mold (2). The bottom of the upper mold (1) is provided with multiple connecting holes (102) that are axially the same as the first through holes (202). When the upper mold (1) and the lower mold (2) are closed, the upper end of the first limiting post (601) is in the connecting hole (102).
3. The pipe fitting expansion device according to claim 1, characterized in that, The stop block (4) is provided with a support block (401) on the side facing the second arc groove (201), and the top of the support block (401) is provided with a third arc groove (4011) that is the same as the second arc groove (201) in both axial direction and diameter.
4. A pipe fitting expansion device according to claim 1, characterized in that, The top of the fixed plate (5) is provided with a U-shaped slide rail (7) along the length direction. The bottom of the stop block (4) is slidably connected to the U-shaped slide rail (7) by a slider. The U-shaped slide rail (7) is provided with multiple second through holes (701) that communicate with the threaded holes.
5. A pipe fitting expansion device according to claim 4, characterized in that, The inner sides of the two vertical sections of the U-shaped slide rail (7) are provided with slide grooves (702) along the length direction. The slider includes a sliding plate (8) and a T-shaped block (801) vertically disposed above the sliding plate (8). The sliding plate (8) is slidably disposed between the two slide grooves (702), and the stop block (4) is fixed to the top of the T-shaped block (801).
6. A pipe fitting expansion device according to claim 5, characterized in that, One end of the sliding plate (8) is provided with a connecting plate (802). The top surface of the connecting plate (802) protrudes from the top of the U-shaped slide rail (7). A third through hole is provided on the connecting plate (802) for connecting screws (10).