Split type hydraulic bending press
By designing the upper and lower press molds of the split hydraulic bending machine, the upper press mold and lower press molds have main bending grooves and auxiliary bending groove structures respectively, the problem of limited application scope of traditional hydraulic bending machines is solved, and bending of straight pipes of different sizes is achieved, saving costs and reducing equipment space.
Patent Information
- Application Number
- CN202421604934.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-07-09
AI Technical Summary
Traditional hydraulic bending machines can only bending a single-size straight pipe, resulting in limited scope of application, increasing bending costs, and taking up space for multiple machines.
A split hydraulic bending machine is designed, using a structure with the upper and lower press molds having main bending grooves and auxiliary bending grooves respectively. By flipping the press mold, bending the straight pipes of different sizes is achieved to reduce the number of equipment.
It realizes bending of straight pipes of different sizes, saves costs, avoids the space occupied by multiple machines, and improves equipment utilization.
Smart Images
Figure CN223145668U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a hydraulic bending machine, in particular to a split-type hydraulic bending machine. Background Art
[0002] A hydraulic bending machine is a device that bends a straight pipe into a bent pipe through hydraulic pressure. The hydraulic bending machine has an upper pressing die and a lower pressing die. The lower surface of the upper pressing die is provided with an upper bending groove, and the upper surface of the lower pressing die is provided with a lower bending groove opposite to the upper bending groove. When a straight pipe needs to be bent, the straight pipe is first placed in the lower bending groove, and then the upper pressing die is pushed downward by the pressure of the oil cylinder. At this time, the straight pipe is simultaneously embedded in the upper bending groove and the lower bending groove, so that the straight pipe is deformed into a shape that conforms to the cavity formed by the enclosure of the upper bending groove and the lower bending groove, and the straight pipe is bent into a bent pipe.
[0003] In the actual bending process, there will be differences in the sizes of the straight pipes that need to be bent. However, the traditional hydraulic bending machine only has a single upper bending groove and a single lower bending groove. Therefore, a hydraulic bending machine can only bend straight pipes of one size, resulting in a limited scope of application. If straight pipes of other sizes need to be bent, only another type of hydraulic bending machine can be used, which increases the bending cost. Moreover, placing multiple hydraulic bending machines together occupies a large amount of space, which is not conducive to the development of work. Summary of the Invention
[0004] The technical problem to be solved by the utility model is to provide a split-type hydraulic bending machine, which can bend straight pipes of different sizes, effectively save the bending cost, and thus avoid the situation that a large number of hydraulic bending machines are piled up and occupy space due to using multiple hydraulic bending machines to bend straight pipes of different sizes.
[0005] The technical solution adopted by the utility model to solve the above technical problems is as follows:
[0006] The utility model discloses a split-type hydraulic bending machine, which comprises a machine base. On the upper surface of the middle part of the machine base, guide plates that are symmetrical to each other are arranged on the left and right sides. Between the upper ends of the guide plates on the left and right sides, a limiting shaft is arranged. Right below the limiting shaft, an oil cylinder located between the guide plates on the left and right sides is arranged, and the upper end surface of the oil cylinder is in contact with the limiting shaft. At the lower end of the piston of the oil cylinder, a pressing plate that penetrates downward out of the oil cylinder and is provided with a matching structure is arranged. On the left and right sides of the pressing plate, orientation sliding grooves that are matched with the guide plates are arranged. Between the pressing plate and the machine base, an upper pressing die and a lower pressing die are arranged, and the upper pressing die is located above the lower pressing die. On the left and right sides of the upper pressing die, upper guiding grooves that are matched with the guide plates are arranged. On the left and right sides of the lower pressing die, lower guiding grooves that are matched with the guide plates are arranged. On the lower surface of the upper pressing die, an upper main bending groove is arranged. On the upper surface of the lower pressing die, a lower main bending groove that is opposite to the upper main bending groove is arranged. On the upper surface of the upper pressing die, an upper auxiliary bending groove is arranged. On the lower surface of the lower pressing die, a lower auxiliary bending groove that is matched with the upper auxiliary bending groove is arranged. There is a clamping distance between the upper pressing die and the lower pressing die. On the outer walls of the left and right sides of the upper pressing die, upper reset seats located on the front and rear sides of the guide plates are arranged. On the outer walls of the left and right sides of the lower pressing die, lower reset seats corresponding to the positions of the upper reset seats are arranged. A reset structure is arranged between the upper reset seat and the lower reset seat.
[0007] The reset structure includes a lower clamping hole arranged on the lower surface of the upper reset seat. On the upper surface of the lower reset seat, an upper positioning hole coaxial with the lower clamping hole is arranged. Between the bottom of the lower clamping hole and the bottom of the upper positioning hole, a reset spring is arranged. On the upper surface of the upper reset seat, an upper clamping hole coaxial with the lower clamping hole is arranged. On the lower surface of the lower reset seat, a lower positioning hole coaxial with the upper positioning hole is arranged.
[0008] At the center of the bottom of the upper clamping hole, an auxiliary screw hole that penetrates through to the lower clamping hole is arranged.
[0009] On the lower surface of the piston, a fixing screw hole is arranged. On the lower surface of the pressing plate, a through hole that penetrates through to the fixing screw hole is arranged. A fixing screw passes upward through the through hole and is screwed into the fixing screw hole, and the upper surface of the head of the fixing screw is in contact with the lower surface of the pressing plate.
[0010] On the upper end of the left guide plate, a left shaft hole that is matched with the limiting shaft is arranged. On the upper end of the right guide plate, a right shaft hole that is matched with the limiting shaft is arranged. The left end of the limiting shaft passes through the left shaft hole to the left and is screwed with a limiting sleeve. Between the limiting sleeve and the left guide plate, a connecting plate is arranged. On the connecting plate, a through hole coaxial with the limiting shaft is arranged, and the limiting shaft passes through the through hole. On the upper end of the connecting plate, a connecting hole is arranged. The right end of the limiting shaft passes through the right shaft hole to the right, and on the right end of the limiting shaft, an auxiliary hole that radially penetrates through itself is arranged. The right end of the limiting shaft is connected with a connecting ring through the auxiliary hole. Between the connecting ring and the connecting hole, a braided belt is connected.
[0011] On one side of the connecting ring, a deformation notch is arranged.
[0012] The side walls on the front and rear sides of the guide plate are provided with triangular grooves; the inner walls on the front and rear sides of the directional chute are provided with protrusions matching the grooves.
[0013] The beneficial effects of the utility model are as follows:
[0014] Compared with the prior art, the upper pressing die of the split-type hydraulic bending machine adopting the structure of the utility model has both an upper main bending groove and an upper auxiliary bending groove, and the lower pressing die has both a lower main bending groove and a lower auxiliary bending groove. When the upper main bending groove and the lower main bending groove face each other, a complete cavity can be formed to bend a straight pipe of one size. When the upper auxiliary bending groove and the lower auxiliary bending groove face each other, they can be closed to form another complete cavity, and straight pipes of different sizes can be bent. At this time, only need to flip the upper pressing die and the lower pressing die, so that the upper auxiliary bending groove is at the bottom and the upper main bending groove is at the top, and the lower auxiliary bending groove is at the top and the lower main bending groove is at the bottom, then the current bending machine can be transformed into a bending machine for bending straight pipes of another size, thus achieving the effect of being able to bend straight pipes of different sizes, effectively saving the bending cost, and effectively avoiding the situation that a large number of hydraulic bending machines are stacked and occupy space due to using multiple hydraulic bending machines to bend straight pipes of different sizes. Description of the Drawings
[0015] Figure 1 is a schematic structural diagram of the split-type hydraulic bending machine of the utility model;
[0016] Figure 2 is a sectional view of the split-type hydraulic bending machine of the utility model. Detailed Embodiment
[0017] The present invention will be further described in detail below in conjunction with the drawings and the specific embodiments:
[0018] Please refer to Figure 1 、 Figure 2, the utility model provides a split-type hydraulic bending machine, which includes a machine base 1. On the upper surface of the middle part of the machine base 1, symmetric guide plates 2 are provided on the left and right sides; a limiting shaft 3 is arranged between the upper ends of the guide plates 2 on the left and right sides; below the limiting shaft 3, there is an oil cylinder 4 located between the guide plates 2 on the left and right sides. The upper end surface of the oil cylinder 4 is in contact with the limiting shaft 3; the lower end of the piston 401 of the oil cylinder 4 penetrates downward out of the oil cylinder 4 and is provided with a pressing plate 5 that matches it; on the left and right sides of the pressing plate 5, there are directional sliding grooves 6 that match the guide plates 2; between the pressing plate 5 and the machine base 1, there are an upper pressing die 7 and a lower pressing die 8, and the upper pressing die 7 is located above the lower pressing die 8; on the left and right sides of the upper pressing die 7, there are upper guiding grooves 9 that match the guide plates 2; on the left and right sides of the lower pressing die 8, there are lower guiding grooves 10 that match the guide plates 2; on the lower surface of the upper pressing die 7, there is an upper main bending groove 11; on the upper surface of the lower pressing die 8, there is a lower main bending groove 12 opposite to the upper main bending groove 11; on the upper surface of the upper pressing die 7, there is an upper auxiliary bending groove 13; on the lower surface of the lower pressing die 8, there is a lower auxiliary bending groove 14 that matches the upper auxiliary bending groove 13; there is a clamping distance 15 between the upper pressing die 7 and the lower pressing die 8; on the outer walls of the left and right sides of the upper pressing die 7, there are upper reset seats 16 located on the front and back sides of the guide plates 2; on the outer walls of the left and right sides of the lower pressing die 8, there are lower reset seats 17 corresponding to the positions of the upper reset seats 16; between the upper reset seat 16 and the lower reset seat 17, there is a reset structure.
[0019] The reset structure includes a lower clamping hole 18 provided on the lower surface of the upper reset seat 16; on the upper surface of the lower reset seat 17, there is an upper positioning hole 19 coaxial with the lower clamping hole 18; between the bottom of the lower clamping hole 18 and the bottom of the upper positioning hole 19, there is a reset spring 20; on the upper surface of the upper reset seat 16, there is an upper clamping hole 21 coaxial with the lower clamping hole 18; on the lower surface of the lower reset seat 17, there is a lower positioning hole 22 coaxial with the upper positioning hole 19.
[0020] At the center of the bottom of the upper clamping hole 21, there is an auxiliary screw hole 23 that communicates with the lower clamping hole 18.
[0021] On the lower surface of the piston 401, there is a fixed screw hole 24; on the lower surface of the pressing plate 5, there is a through hole 25 that communicates with the fixed screw hole 24; a fixed screw 26 passes upward through the through hole 25 and is screwed into the fixed screw hole 24, and the upper surface of the head of the fixed screw 26 is in contact with the lower surface of the pressing plate 5.
[0022] The upper end of the left guide plate 2 is provided with a left shaft hole 27 that matches the limit shaft 3, and the upper end of the right guide plate 2 is provided with a right shaft hole 28 that matches the limit shaft 3; the left end of the limit shaft 3 passes through the left shaft hole 27 to the left and is screwed with a limit sleeve 29; a connecting plate 30 is arranged between the limit sleeve 29 and the left guide plate 2; the connecting plate 30 is provided with a through hole 31 that is coaxial with the limit shaft 3, and the limit shaft 3 passes through the through hole 31; the upper end of the connecting plate 30 is provided with a connecting hole 32; the right end of the limit shaft 3 passes through the right shaft hole 28 to the right, and the right end of the limit shaft 3 is provided with an auxiliary hole 33 that radially penetrates itself; the right end of the limit shaft 3 is connected with a connecting ring 34 through the auxiliary hole 33; the connecting ring 34 and the connecting hole 32 are connected through a braided belt 35.
[0023] One side of the connecting ring 34 is provided with a deformation notch.
[0024] The front and rear side walls of the guide plate 2 are provided with triangular grooves 36; the inner walls of the front and rear sides of the directional chute 6 are provided with protrusions 37 that match the grooves 36.
[0025] The usage method of the present utility model is as follows:
[0026] When it is necessary to bend a straight pipe, first place the straight pipe between the upper main bending groove 11 and the lower main bending groove 12 through the clamping distance 15 between the upper pressing die 7 and the lower pressing die 8. At this time, a part of the straight pipe is embedded in the lower main bending groove 12, which is beneficial to the later bending work. The oil cylinder 4 is an existing device and can be connected to an automatic hydraulic pump or a manual hydraulic pump through an oil pipe, so as to control the operation of the oil cylinder 4 through the automatic hydraulic pump or the manual hydraulic pump. As the hydraulic oil is injected into the oil cylinder 4, the piston in the oil cylinder 4 will push downward out of the oil cylinder 4, and then push the pressing plate 5 downward through the piston. The existence of the limit shaft 3 can effectively limit the upward movement of the oil cylinder 4 and ensure the stability when the pressing plate 5 moves downward. When the pressing plate 5 moves downward, the pressing plate 5 will move downward stably along the track of the guide plate 2. When the pressing plate 5 moves downward, the pressing plate 5 will directly push the upper pressing die 7 downward, so as to realize the downward movement of the upper main bending groove 11. At this time, the clamping distance 15 gradually becomes smaller, and a part of the straight pipe also begins to be embedded in the upper main bending groove 11. As the lower surface of the upper pressing die 7 fits with the upper surface of the lower pressing die 8, the upper main bending groove 11 and the lower main bending groove 12 are closed to form a complete cavity, and the straight pipe is bent into the required bent pipe to complete the bending work. When the upper pressing die 7 moves downward, the upper reset seat 16 moves downward synchronously. At this time, the reset spring 20 is compressed and generates elasticity. Therefore, when the piston is reset under the action of the hydraulic pump, the upper pressing die 7 can also move upward and reset under the elastic action for the next bending work.
[0027] There are dimensional differences between the upper auxiliary bending groove 13 and the upper main bending groove 11, and between the lower auxiliary bending groove 14 and the lower main bending groove 12. However, when the upper auxiliary bending groove 13 and the lower auxiliary bending groove 14 are opposite to each other, they can be closed to form another complete cavity, which can bend straight pipes of different sizes. At this time, only need to turn the upper die 7 and the lower die 8 over, so that the upper auxiliary bending groove 13 is at the bottom and the upper main bending groove 11 is at the top, and the lower auxiliary bending groove 14 is at the top and the lower main bending groove 12 is at the bottom, then the current bending machine can be transformed into a bending machine for bending straight pipes of another size, thus achieving the effect of being able to bend straight pipes of different sizes, effectively saving the bending cost, and effectively avoiding the situation that a large number of hydraulic bending machines are piled up and occupy space due to using multiple hydraulic bending machines to bend straight pipes of different sizes.
[0028] When it is necessary to turn the upper die 7 and the lower die 8 over, the limit sleeve 29 can be first screwed out to the left from the left end of the limit shaft 3, and then hold the right end of the limit shaft 3 and pull the limit shaft 3 to the right, so that the limit shaft 3 is simultaneously pulled out from the left shaft hole 27 and the right shaft hole 28. After losing the restriction of the limit shaft 3, the oil cylinder 4 can move upward. At this time, hold the pressing plate 5 and make the pressing plate 5 support the oil cylinder 4 to move upward, and finally make the guide plate 2 completely slide out of the directional sliding groove 6, realizing the separation of the pressing plate 5. Then move the upper die 7 upward, so that the guide plate 2 completely slides out of the upper guide groove 9. Finally, move the lower die 8 upward, so that the guide plate 2 completely slides out of the lower guide groove 10. After the lower die 8 and the upper die 7 are completely separated, it is easy to turn the upper die 7 and the lower die 8 over. After the turning is completed, the lower die 8 can be installed between the left and right guide plates 2 through the lower guide groove 10. After the installation of the lower die 8 is completed, the upper die 7 can be installed between the left and right guide plates 2 through the upper guide groove 9. At this time, the upper auxiliary bending groove 13 and the lower auxiliary bending groove 14 are opposite to each other, and the upper clamping hole 21 and the lower positioning hole 22 are opposite to each other. The return spring 20 is also between the bottom of the upper clamping hole 21 and the bottom of the lower positioning hole 22 at this time. After turning the upper die 7 and the lower die 8 over, the upper die 7 and the lower die 8 can still be reset by using the return spring 20. Finally, after the pressing plate 5 and the oil cylinder 4 are reinstalled, the limit shaft 3 can be restored, so that the bending machine can bend a straight pipe of another size by using the upper auxiliary bending groove 13 and the lower auxiliary bending groove 14.
[0029] There is an auxiliary screw hole 23 at the center of the bottom of the upper clamping hole 21, which is communicated with the lower clamping hole 18. The auxiliary screw hole 23 can be used for screwing a screw. The existence of the upper clamping hole 21 and the lower clamping hole 18 can be used to hide the head of the screw. When the lower clamping hole 18 faces downward, as the auxiliary screw hole 23 screws the screw, the head of the screw is located in the upper clamping hole 21, and the screw body will penetrate upward into the lower clamping hole 18 and penetrate downward out of the lower clamping hole 18. At this time, the return spring 20 is sleeved outside the screw, effectively avoiding the situation that the return spring 20 tilts when being compressed or expanded, and ensuring the elastic stability of the return spring 20.
[0030] A fixing screw hole 24 is provided on the lower surface of the piston 401, a through hole 25 communicating with the fixing screw hole 24 is provided on the lower surface of the pressing plate 5, a fixing screw 26 passes upward through the through hole 25 and is screwed into the fixing screw hole 24, and the upper surface of the head of the fixing screw 26 is in contact with the lower surface of the pressing plate 5. This fixing method can not only effectively ensure the stability between the piston 401 and the pressing plate 5, but also ensure the synchronism when the two move, thus ensuring the stability when bending the straight pipe.
[0031] A left shaft hole 27 matching the limiting shaft 3 is provided at the upper end of the left guide plate 2, a right shaft hole 28 matching the limiting shaft 3 is provided at the upper end of the right guide plate 2. The left end of the limiting shaft 3 passes leftward through the left shaft hole 27 and is screwed with a limiting sleeve 29. A connecting plate 30 is provided between the limiting sleeve 29 and the left guide plate 2. A through hole 31 coaxial with the limiting shaft 3 is provided on the connecting plate 30. The limiting shaft 3 passes through the through hole 31. A connecting hole 32 is provided at the upper end of the connecting plate 30. The right end of the limiting shaft 3 passes rightward through the right shaft hole 28. An auxiliary hole 33 radially penetrating the limiting shaft 3 itself is provided at the right end of the limiting shaft 3. A connecting ring 34 is connected to the right end of the limiting shaft 3 through the auxiliary hole 33. The connecting ring 34 and the connecting hole 32 are connected by a braided belt 35. This fixing method is conducive to the disassembly and assembly of the braided belt 35, thus facilitating the replacement of the braided belt 35. Moreover, the braided belt 35 can be used as a handle to lift the bending machine, facilitating the movement of the bending machine.
[0032] A deformation notch is provided on one side of the connecting ring 34. When the connecting ring 34 is made of metal, only by twisting the connecting ring 34 can the deformation notch be enlarged, so that the connecting ring 34 can be quickly removed from the auxiliary hole 33, facilitating the disassembly and assembly of the connecting ring 34.
[0033] Triangular grooves 36 are provided on the front and rear side walls of the guide plate 2, and protrusions 37 matching the grooves 36 are provided on the front and rear inner walls of the directional sliding groove 6. The existence of the grooves 36 can effectively increase the guiding area of the guide plate 2, thereby further improving the stability when the pressing plate 5 is pressed down by the piston 401 and effectively ensuring the bending quality.
Claims
1. A split-type hydraulic press brake, comprising a machine base, characterized in that: On the upper surface of the middle part of the base, there are symmetrically arranged guide plates on the left and right sides; between the upper ends of the guide plates on the left and right sides, there is a limit shaft; directly below the limit shaft, there is an oil cylinder located between the guide plates on the left and right sides, and the upper end surface of the oil cylinder is in contact with the limit shaft; the lower end of the piston of the oil cylinder is provided with a pressing plate that passes downward through the outside of the oil cylinder and is provided with a matching pressing plate; on the left and right sides of the pressing plate, there are orientation chutes that match the guide plates; between the pressing plate and the base, there are an upper pressing die and a lower pressing die, and the upper pressing die is located above the lower pressing die; on the left and right sides of the upper pressing die, there are upper guide chutes that match the guide plates; on the left and right sides of the lower pressing die, there are lower guide chutes that match the guide plates; on the lower surface of the upper pressing die, there is an upper main bending groove; on the upper surface of the lower pressing die, there is a lower main bending groove opposite to the upper main bending groove; on the upper surface of the upper pressing die, there is an upper auxiliary bending groove; on the lower surface of the lower pressing die, there is a lower auxiliary bending groove that matches the upper auxiliary bending groove; there is a clamping distance between the upper pressing die and the lower pressing die; on the outer walls of the left and right sides of the upper pressing die, there are upper reset seats located on the front and rear sides of the guide plates; on the outer walls of the left and right sides of the lower pressing die, there are lower reset seats corresponding to the positions of the upper reset seats; between the upper reset seat and the lower reset seat, there is a reset structure.
2. The split-type hydraulic press brake according to claim 1, wherein: The reset structure includes a lower clamping hole provided on the lower surface of the upper reset seat; on the upper surface of the lower reset seat, there is an upper positioning hole coaxial with the lower clamping hole; between the bottom of the lower clamping hole and the bottom of the upper positioning hole, there is a reset spring; on the upper surface of the upper reset seat, there is an upper clamping hole coaxial with the lower clamping hole; on the lower surface of the lower reset seat, there is a lower positioning hole coaxial with the upper positioning hole.
3. The split hydraulic press brake according to claim 2, characterized in that: At the center of the bottom of the upper clamping hole, there is an auxiliary screw hole that communicates with the lower clamping hole.
4. The split-type hydraulic press brake according to claim 1, wherein: On the lower surface of the piston, there is a fixing screw hole; on the lower surface of the pressing plate, there is a through hole that communicates with the fixing screw hole; a fixing screw passes upward through the through hole and is screwed into the fixing screw hole, and the upper surface of the head of the fixing screw is in contact with the lower surface of the pressing plate.
5. The split-type hydraulic press brake according to claim 1, characterized in that: On the upper end of the left guide plate, there is a left shaft hole that matches the limit shaft, and on the upper end of the right guide plate, there is a right shaft hole that matches the limit shaft; the left end of the limit shaft passes through the left shaft hole to the left and is screwed with a limit sleeve; between the limit sleeve and the left guide plate, there is a connecting plate; on the connecting plate, there is a through hole coaxial with the limit shaft, and the limit shaft passes through the through hole; on the upper end of the connecting plate, there is a connecting hole; the right end of the limit shaft passes through the right shaft hole to the right, and on the right end of the limit shaft, there is an auxiliary hole that radially penetrates itself; the right end of the limit shaft is connected with a connecting ring through the auxiliary hole; between the connecting ring and the connecting hole, there is a braided belt connected.
6. The split-type hydraulic press brake according to claim 5, characterized in that: On one side of the connecting ring, there is a deformation notch.
7. A split-type hydraulic press brake according to claim 1, characterized in that: On the front and rear side walls of the guide plate, there are triangular grooves; on the front and rear inner walls of the orientation chute, there are protrusions that match the grooves.