A method for hot-pressing and shaping the smooth surface of a bellows end

Abstract

This invention discloses a method for hot-pressing and shaping the smooth end of a bellows, relating to the field of bellows processing technology. In this invention, when hot-pressing the end of a bellows, the bellows end is first inserted into a crimping groove and simultaneously fitted onto the inner core. A driving mechanism synchronously drives each set of crimping mold blocks to move towards the bellows, applying a clamping force to the bellows end. Simultaneously, a heating block raises the temperature, and under high temperature and pressure, the bellows end is pressed into a cylindrical structure. After shaping, the driving mechanism drives each set of crimping mold blocks to move in the opposite direction, removing the bellows. This embodiment of the invention eliminates the need for a grinding mechanism, thus avoiding damage to the bellows and preventing the generation of debris, resulting in better performance.

Description

Technical Field

[0001] This invention relates to the field of corrugated pipe processing technology, specifically to a method for hot-pressing and shaping the smooth surface of a corrugated pipe end. Background Technology

[0002] The use of corrugated pipes as a transmission medium in vehicles and construction machinery is becoming increasingly widespread. This is due to the advantages of corrugated pipes, such as good flexibility, high radial strength, ease of installation, small footprint, environmental friendliness, and easy recycling. However, connecting corrugated pipes to joints or interfaces presents a technological challenge. The corrugated shape gives the pipeline spring-like elasticity, and its concave-convex shape ensures reliable radial pressure resistance. However, the corrugated shape makes it difficult to connect with joints or interfaces, necessitating the addition of a smooth section of pipe to the end of the corrugated pipe for connection to the joint or user interface. If a combination of smooth and corrugated pipe is used in the manufacturing process, the length of the corrugated pipe cannot be arbitrarily cut. Continuous adjustments to the corrugated tooling are required during processing to achieve different lengths, resulting in high tooling costs and long production cycles, thus limiting the continuous processing and versatility of the corrugated pipe.

[0003] In existing technologies, such as the patent document with publication number CN217194403U, a stamping device and method for bellows ports are disclosed. Specifically, a base plate is disclosed, with two fixing plates fixedly connected to its upper side. A bearing is held within each fixing plate, and the two ends of a screw are respectively fitted into the bearings. In this invention, rotating the screw with a handle moves the grinding roller to the left, allowing it to overlap with the right side of the bellows. A motor drives the grinding roller to rotate via a shaft, thus grinding the right side of the bellows. However, in practical applications of this stamping and shaping method, grinding the port can easily damage the bellows port. Furthermore, the grinding process generates a large amount of debris, increasing production costs and easily causing pollution. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned technical problems and provide a method for hot-pressing and shaping the smooth surface of a bellows port.

[0005] To achieve the above objectives, the present invention employs the following technical solution:

[0006] A method for hot-pressing and shaping the smooth surface of a bellows end includes the following steps:

[0007] Step 1: Start the second motor to drive the first screw to rotate. As the first nut moves on the first screw, it drives the arc-shaped clamping plate to move inward to clamp the bellows.

[0008] Step 2: Start the third motor to drive the second screw to rotate. As the second nut moves on the second screw, it drives the positioning box to move. The corrugated pipe end extends into the crimping groove and is fitted onto the inner core.

[0009] Step 3: Start the first motor to drive the gear to rotate. During the rotation of the gear, the ring rack rotates synchronously. The arc-shaped protrusion abuts against the pin shaft and pushes the positioning rod in the guide groove to move towards the bellows. The clamping mold block abuts against the bellows port.

[0010] Step 4: Heat the corrugated pipe end by heating it with a heating block to press it into a cylindrical structure;

[0011] Step 5: After the corrugated tube end is hot-pressed and formed, the clamping mold block is reset and released, and the corrugated tube continues to be driven to move towards the support. When the formed end is moved to the air outlet, the fan is started. The fan blows air through the air inlet to the corrugated tube end through the air outlet to cool the formed part.

[0012] Furthermore, the corrugated pipe end smooth surface hot pressing and shaping device used in the corrugated pipe end smooth surface hot pressing and shaping method of the present invention includes a worktable, on which a processing base is arranged;

[0013] The processing base is equipped with a positioning plate, on one side of which several sets of clamping mold blocks are arranged in a circumferential array and can be slidably arranged; when each set of clamping mold blocks moves toward the center end of the positioning plate, they surround to form a clamping mold ring, and a clamping groove is formed at the center end of the clamping mold ring. The clamping groove is circular, and an inner core is coaxially arranged at the center end of the clamping groove.

[0014] It also includes a drive mechanism and a positioning mechanism. The drive mechanism is connected to the crimping mold block to drive the crimping mold block to slide on the positioning plate. Each set of crimping mold blocks has a positioning groove on the side facing the crimping groove, and a heating block is embedded in the positioning groove. The positioning mechanism is used to position and fix the bellows.

[0015] Furthermore, the drive mechanism of the corrugated pipe port smooth surface hot pressing shaping device includes positioning seats arranged on each set of pressing mold blocks, wherein a number of guide grooves are correspondingly opened on the positioning plate, the positioning seats are fixedly connected to positioning rods that are slidably arranged in the guide grooves, and the other end of the positioning rods is connected to a pushing mechanism that drives them to slide along the guide grooves.

[0016] Furthermore, the adjustment mechanism of the corrugated pipe port smooth surface hot pressing shaping device includes a pin shaft part arranged at the other end of the positioning rod. The positioning plate is rotatably provided with an annular rack. The inner end face of the annular rack is provided with several sets of arc-shaped protrusions arranged in a circumferential array. An arc-shaped groove is formed between two adjacent sets of arc-shaped protrusions. The annular rack is connected to the rotation mechanism that drives its rotation.

[0017] Furthermore, the rotating mechanism of the corrugated pipe port smooth surface hot pressing shaping device includes a gear meshing with a ring rack, and the gear is fixedly connected to the output end of a first motor arranged on the processing base; specifically, the first motor is started to drive the gear to rotate, and the gear synchronously drives the ring rack to rotate during the rotation process.

[0018] Furthermore, the positioning plate of the corrugated pipe port smooth surface hot pressing shaping device is also provided with several sets of elastic mechanisms connected to the positioning seat.

[0019] Furthermore, the elastic mechanism of the corrugated pipe port smooth surface hot pressing shaping device includes baffles arranged in a circumferential array on the positioning plate, telescopic sleeves arranged on the baffles toward the pressing mold block, return springs arranged on the telescopic sleeves, and the end of the telescopic sleeves being fixedly connected to the limiting seat arranged on the positioning seat.

[0020] The present invention provides a method for hot-pressing and shaping a smooth corrugated pipe end, which has the following advantages: When hot-pressing the end of the corrugated pipe, the end of the corrugated pipe is first inserted into the crimping groove and simultaneously fitted onto the inner core. The driving mechanism synchronously drives each set of crimping mold blocks to move towards the corrugated pipe, giving the end of the corrugated pipe a clamping force. At the same time, the heating block heats the pipe, and under the action of high temperature and high pressure, the end of the corrugated pipe is pressed into a cylindrical structure. After shaping, the driving mechanism drives each set of crimping mold blocks to move in the opposite direction and remove the corrugated pipe. The embodiment of the present invention does not require the use of a grinding mechanism for grinding, which not only avoids damage to the corrugated pipe but also avoids the generation of debris, resulting in better performance. Attached Figure Description

[0021] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings:

[0022] Figure 1 This invention provides a method for hot-pressing and shaping the smooth surface of a bellows end.

[0023] Figure 2 Schematic diagram of the structure of the bellows end smooth surface hot pressing and shaping device used in the bellows end smooth surface hot pressing and shaping method provided by the present invention. Figure 1 ;

[0024] Figure 3 Schematic diagram of the structure of the bellows end smooth surface hot pressing and shaping device used in the bellows end smooth surface hot pressing and shaping method provided by the present invention. Figure 2 ;

[0025] Figure 4 A schematic diagram of the pressing mold block in the bellows port smooth surface hot pressing and shaping device used in the bellows port smooth surface hot pressing and shaping method provided by the present invention;

[0026] Figure 5A schematic diagram of the heating block in the bellows port smooth surface hot pressing and shaping device used in the bellows port smooth surface hot pressing and shaping method provided by the present invention;

[0027] Figure 6 Schematic diagram of the structure of the bellows end smooth surface hot pressing and shaping device used in the bellows end smooth surface hot pressing and shaping method provided by the present invention. Figure 3 ;

[0028] Figure 7 Schematic diagram of the structure of the bellows end smooth surface hot pressing and shaping device used in the bellows end smooth surface hot pressing and shaping method provided by the present invention. Figure 4 .

[0029] Explanation of the numbers in the diagram: 1. Workbench; 2. Third motor; 3. Second motor; 4. Cooling box; 5. Positioning plate; 6. Inner core; 7. Clamping mold block; 8. Ring rack; 101. Machining base; 102. Support; 103. Air outlet; 201. Adjustment box; 202. Second screw; 203. Second nut; 301. Positioning box; 302. L-shaped support; 303. Arc-shaped clamping plate; 304. Through slot; 3 05. First screw; 306. First nut; 401. Air inlet; 501. Baffle; 502. Return spring; 503. Guide groove; 504. Limit seat; 505. Positioning seat; 506. Telescopic sleeve; 701. Clamping groove; 702. Positioning rod; 703. Heating block; 704. Positioning groove; 801. Arc-shaped protrusion; 802. Arc-shaped groove; 803. Pin shaft; 804. Gear; 805. First motor. Implementation

[0030] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] It should be noted that in the embodiments of the present invention, all directional indications (such as up-down-left-right-forward-backward...) are only used to explain the relative positional relationship and movement between the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly. The connection can be a direct connection or an indirect connection.

[0033] Figure 1This invention provides a hot-pressing shaping method for the smooth surface of a bellows end. The hot-pressing shaping method for the smooth surface of a bellows end, utilizing the above-mentioned hot-pressing shaping process, includes the following steps:

[0034] Step 1: Start the second motor 3 to drive the first screw 305 to rotate. During the process of the first nut 306 moving on the first screw 305, drive the arc-shaped clamping plate 303 to move inward to achieve clamping of the bellows.

[0035] Step 2: Start the third motor 2 to drive the second screw 202 to rotate. During the process of the second nut 203 moving on the second screw 202, drive the positioning box 301 to move. The corrugated pipe end extends into the crimping groove 701 and is sleeved on the inner core 6.

[0036] Step 3: Start the first motor 805 to drive the gear 804 to rotate. During the rotation of the gear 804, the ring rack 8 rotates synchronously. The arc protrusion 801 abuts against the pin shaft 803 and pushes the positioning rod 702 to move in the guide groove 503 toward the bellows. The clamping mold block 7 abuts against the bellows port.

[0037] Step 4: Heat the corrugated pipe end using heating block 703 to press it into a cylindrical structure;

[0038] Step 5: After the corrugated tube end is hot-pressed and formed, the clamping mold block 7 is reset and released, and the corrugated tube continues to be driven to move towards the bracket 102. When the formed end is moved to the air outlet 103, the fan is started. The fan blows air through the air inlet 401 to the corrugated tube end through the air outlet 103 to cool down the formed part.

[0039] like Figures 2-3 As shown, the bellows end smooth surface hot pressing and shaping device used in the bellows end smooth surface hot pressing and shaping method of the present invention includes:

[0040] Workbench 1, on which a processing base 101 is provided. In one embodiment of this invention, the processing base 101 is fixed to the workbench 1 by a number of bolts.

[0041] A positioning plate 5 is provided on the processing base 101. Several sets of clamping mold blocks 7 are slidably arranged in a circular array on one side of the positioning plate 5. In this embodiment, eight sets of clamping mold blocks 7 are arranged. When each set of clamping mold blocks 7 moves toward the center end of the positioning plate 5, they surround to form a clamping mold ring. A clamping groove 701 is formed at the center end of the clamping mold ring. The clamping groove 701 is circular. An inner core 6 is coaxially arranged at the center end of the clamping groove 701. Specifically, the inner core 6 is a columnar structure and is made of metal.

[0042] It also includes a drive mechanism, which is connected to the clamping mold block 7 to drive the clamping mold block 7 to slide on the positioning plate 5.

[0043] Each set of crimping mold blocks 7 has a positioning groove 704 on one side facing the crimping groove 701, and a heating block 703 is embedded in the positioning groove 704. In one embodiment of this invention, the heating block 703 is a resistive structure. Specifically, when hot-pressing the end of the corrugated tube, the end of the corrugated tube is first inserted into the crimping groove 701 and simultaneously fitted onto the inner core 6. The driving mechanism synchronously drives each set of crimping mold blocks 7 to move towards the corrugated tube, giving the end of the corrugated tube a pressing force. At the same time, the heating block 703 heats the tube to a temperature of 150-200℃. Under the action of high temperature and high pressure, the end of the corrugated tube is pressed into a cylindrical structure. After the shaping is completed, the driving mechanism drives each set of crimping mold blocks 7 to move in the opposite direction and remove the corrugated tube. This embodiment of the invention does not require a grinding mechanism for grinding, which not only avoids damage to the corrugated tube but also prevents the generation of debris, resulting in better performance.

[0044] It also includes a positioning mechanism, which is used to position and fix the bellows; before hot pressing the bellows, it is first positioned and fixed by the positioning mechanism.

[0045] As a further solution in this embodiment, such as Figure 4 As shown, the driving mechanism includes positioning seats 505 arranged on each set of clamping mold blocks 7. The positioning plate 5 is provided with several sets of guide grooves 503. The positioning seat 505 is fixedly connected to the positioning rod 702 that is slidably arranged in the guide groove 503. The other end of the positioning rod 702 is connected to the pushing mechanism that drives it to slide along the guide groove 503. Specifically, when the bellows port is hot-pressed, the pushing mechanism pushes the positioning rod 702 to slide in the guide groove 503, and then the positioning seat 505 drives the clamping mold block 7 to move.

[0046] Furthermore, the adjustment mechanism includes a pin shaft portion 803 disposed at the other end of the positioning rod 702. The positioning plate 5 is rotatably provided with an annular rack 8. The inner end face of the annular rack 8 is provided with several sets of arc-shaped protrusions 801 arranged in a circumferential array. An arc-shaped groove 802 is formed between two adjacent sets of arc-shaped protrusions 801. The annular rack 8 is connected to a rotating mechanism that drives its rotation. It can be explained that the annular rack 8 is driven to rotate by the rotating mechanism. During the rotation process, the annular rack 8 pushes the positioning rod 702 in the guide groove 503 towards the direction of the bellows by abutting against the arc-shaped protrusions 801 and the pin shaft portion 803.

[0047] The rotating mechanism includes a gear 804 that meshes with the ring rack 8. The gear 804 is fixedly connected to the output end of the first motor 805 mounted on the processing base 101. Specifically, the first motor 805 is started to drive the gear 804 to rotate, and the gear 804 synchronously drives the ring rack 8 to rotate during the rotation process.

[0048] like Figure 5 As shown, the positioning plate 5 is also provided with several sets of elastic mechanisms connected to the positioning seat 505. Specifically, when each set of arc-shaped protrusions 801 drives the pin shaft part 803 to move towards the bellows direction, each set of elastic mechanisms stretches to generate elastic force. As the ring rack 8 rotates, the elastic mechanism drives it to reset, so that each set of pin shaft parts 803 abuts against the groove wall of the arc-shaped groove 802, and the positioning rod 702 moves to the farthest end of the guide groove 503, achieving the effect of automatic reset.

[0049] As a further embodiment, the elastic mechanism includes baffles 501 arranged in a circular array on the positioning plate 5, telescopic sleeves 506 arranged on the baffles 501 toward the clamping mold block 7, and a return spring 502 arranged on the telescopic sleeves 506. The end of the telescopic sleeves 506 is fixedly connected to a limiting seat 504 arranged on the positioning seat 505. It can be explained that when the positioning seat 505 moves toward the bellows, the positioning seat 505 drives the telescopic sleeves 506 to stretch through the limiting seat 504 to generate elastic force, at which time the return spring 502 is stretched.

[0050] In this embodiment, the end of the inner core 6 is fixed to the processing base 101 by a bracket 102. A cooling box 4 is also provided on the bracket 102 facing the inner core 6. An air outlet slot 103 is provided between the cooling box 4 and the inner core 6. A fan facing the inner core 6 is provided in the cooling box 4, and the other side of the fan is connected to an air inlet 401 on the cooling box 4. It can be explained that after the corrugated pipe end is hot-pressed, the corrugated pipe is driven to move towards the bracket 102. When the formed end is moved to the air outlet slot 103, the fan is started. The fan blows air through the air inlet 401 and through the air outlet slot 103 to the corrugated pipe end to cool the formed part.

[0051] As a further solution in this embodiment, such as Figures 6-7As shown, the positioning mechanism includes a positioning box 301 mounted on the workbench 1. A first screw 305 is rotatably mounted in the positioning box 301. The end of the first screw 305 is fixedly connected to the output end of a second motor 3 mounted on the outside of the positioning box 301. The threads on both sides of the first screw 305 have opposite directions of rotation. A first nut 306 is helically mounted on the first screw 305. The first nut 306 passes through a through slot 304 opened on the positioning box 301 and is fixedly connected to an arc-shaped clamping plate 303 through an L-shaped bracket 302. It can be explained that when fixing the corrugated pipe, the second motor 3 is first started to drive the first screw 305 to rotate. During the process of the first nut 306 moving on the first screw 305, it drives the arc-shaped clamping plate 303 to move inward to achieve clamping of the corrugated pipe.

[0052] Furthermore, the workbench 1 is also equipped with an adjustment box 201, in which a second screw 202 is rotatably arranged. The end of the second screw 202 is fixedly connected to the output end of the third motor 2 located on the outside of the adjustment box 201. A second nut 203, which is fixedly connected to the positioning box 301, is screwed onto the second screw 202. It can be explained that when it is necessary to adjust the position of the bellows port, the third motor 2 is started to drive the second screw 202 to rotate. During the movement of the second nut 203 on the second screw 202, the positioning box 301 is moved to achieve position adjustment.

[0053] The parts not covered in this technical solution can be implemented using existing technologies.

[0054] The foregoing has shown and described the basic principles, main features, and characteristics of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A method for hot-pressing and shaping the smooth surface of a bellows end, characterized in that, The bellows end smooth surface hot pressing and shaping method uses a bellows end smooth surface hot pressing and shaping device including: Workbench (1), on which processing base (101) is arranged. The processing base (101) is provided with a positioning plate (5), wherein a number of sets of clamping mold blocks (7) are slidably arranged in a circular array on one side of the positioning plate (5); when each set of clamping mold blocks (7) moves toward the center end of the positioning plate (5), they surround to form a clamping mold ring, and a clamping groove (701) is formed at the center end of the clamping mold ring. The clamping groove (701) is circular, and an inner core (6) is coaxially arranged at the center end of the clamping groove (701). The corrugated pipe end smooth surface hot pressing shaping device also includes a driving mechanism and a positioning mechanism. The driving mechanism is connected to the pressing mold block (7) to drive the pressing mold block (7) to slide on the positioning plate (5). Each set of pressing mold blocks (7) has a positioning groove (704) on one side facing the pressing groove (701). A heating block (703) is embedded in the positioning groove (704). The positioning mechanism is used to position and fix the corrugated pipe. The method for hot-pressing and shaping the smooth surface of the bellows port includes the following steps: Step 1: Start the second motor (3) to drive the first screw (305) to rotate. During the process of the first nut (306) moving on the first screw (305), drive the arc-shaped clamping plate (303) to move inward to achieve clamping of the bellows. Step 2: Start the third motor (2) to drive the second screw (202) to rotate. During the process of the second nut (203) moving on the second screw (202), it drives the positioning box (301) to move. The corrugated pipe end extends into the crimping groove (701) and is sleeved on the inner core (6). Step 3: Start the first motor (805) to drive the gear (804) to rotate. During the rotation of the gear (804), the ring rack (8) is driven to rotate synchronously. The arc protrusion (801) abuts against the pin shaft (803) and pushes the positioning rod (702) to move in the guide groove (503) toward the bellows. The clamping mold block (7) abuts against the bellows port. Step 4: Heat the corrugated pipe end with heating block (703) to press it into a cylindrical structure; Step 5: After the corrugated tube end is hot-pressed and formed, the clamping mold block (7) is reset and released, and the corrugated tube continues to be driven to move towards the bracket (102). When the formed end is moved to the air outlet groove (103), the fan is started. The fan blows air through the air inlet (401) to the corrugated tube end through the air outlet groove (103) to cool down the formed part.

2. The method for hot-pressing and shaping the smooth surface of a bellows end as described in claim 1, characterized in that: The driving mechanism of the corrugated pipe port smooth surface hot pressing shaping device includes a positioning seat (505) arranged on each set of pressing mold blocks (7). The positioning plate (5) is provided with a number of guide grooves (503). The positioning seat (505) is fixedly connected to the positioning rod (702) that is slidably arranged in the guide groove (503). The other end of the positioning rod (702) is connected to the pushing mechanism that drives it to slide along the guide groove (503).

3. The method for hot-pressing and shaping the smooth surface of a bellows end according to claim 2, characterized in that: The adjustment mechanism of the corrugated pipe port smooth surface hot pressing shaping device includes a pin shaft (803) arranged at the other end of the positioning rod (702). The positioning plate (5) is rotatably provided with an annular rack (8). The inner end face of the annular rack (8) is arranged with several sets of arc-shaped protrusions (801) in a circumferential array. An arc-shaped groove (802) is formed between two adjacent sets of arc-shaped protrusions (801). The annular rack (8) is connected to the rotation mechanism that drives its rotation.

4. The method for hot-pressing and shaping the smooth surface of a bellows end according to claim 3, characterized in that: The rotating mechanism of the corrugated pipe port smooth surface hot pressing shaping device includes a gear (804) meshing with the ring rack (8). The gear (804) is fixedly connected to the output end of the first motor (805) arranged on the processing base (101). Specifically, the first motor (805) is started to drive the gear (804) to rotate. During the rotation process, the gear (804) synchronously drives the ring rack (8) to rotate.

5. The method for hot-pressing and shaping the smooth surface of a bellows end according to claim 4, characterized in that: The elastic mechanism of the corrugated pipe port smooth surface hot pressing shaping device includes baffles (501) arranged in a circular array on the positioning plate (5), telescopic sleeves (506) arranged on the baffles (501) in the direction of the pressing mold block (7), a return spring (502) arranged on the telescopic sleeves (506), and the end of the telescopic sleeves (506) is fixedly connected to the limiting seat (504) arranged on the positioning seat (505).

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