Flaring device

Abstract

The application provides a flaring device and belongs to the technical field of machinery. The flaring device solves the problem of low production efficiency. The flaring device comprises a punch press with a machine base and a punch, a workbench is fixed on the machine base below the punch, a rotatable turntable is arranged on the workbench, a downward projection of the punch is located at the edge of the turntable, at least one material receiving port is arranged at the edge of the turntable, a material receiving seat is fixed at the bottom of the workbench, the material receiving seat is provided with a material receiving gap penetrating through the side and top of the material receiving seat, the workbench is provided with a through hole in the vertical direction and the through hole is connected with the material receiving gap, the turntable can rotate to the position that the material receiving port is above the through hole, and a pushing rod which can extend to the through hole through the material receiving gap is slidably arranged in the material receiving seat. The flaring device has the advantages of high production efficiency, reliable structure and the like.

Description

Technical Field

[0001] This invention belongs to the field of mechanical technology and relates to a flaring device. Background Technology

[0002] In current piping connection systems, copper pipes are used as connectors for thin-walled stainless steel pipes. One end of the copper pipe is flared to form a socket. After the thin-walled stainless steel pipe to be connected is inserted into the socket, hydraulic clamps are used to clamp it on the outside of the copper pipe at the socket, causing both the copper and thin-walled stainless steel pipes to be deformed and fixed together. If the thin-walled stainless steel pipe is to be connected to a valve, the copper pipe's thin wall cannot be threaded. Therefore, a nut is used to achieve a threaded connection with the valve. To prevent the nut from detaching from the copper pipe, a shoulder is provided at the other end of the copper pipe to block the nut. The final state of this copper pipe and valve assembly is as described in the gas valve disclosed in patent application number 201420859731.7.

[0003] Currently, the existing manufacturing method for this type of connector, consisting of a copper tube and a nut, involves first extruding a shoulder onto one end of the copper tube using an extrusion machine. Then, the nut is fitted onto the unextruded end of the copper tube. Finally, a punch press is used to flare the unextruded end of the copper tube. Essentially, the connection between the nut and the copper tube is done manually, and the copper tube is then manually placed onto the punch press for flaring after the connection is complete. This results in low production efficiency in actual production. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the prior art by proposing a flaring device that solves the problem of low production efficiency.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A flaring device includes a punch press with a base and a punch. A worktable is fixed on the base below the punch, and a rotatable turntable is provided on the worktable. The downward projection of the punch is located at the edge of the turntable, and the edge of the turntable is provided with at least one material receiving port. The worktable is characterized in that a material receiving seat is fixed at the bottom of the worktable, the material receiving seat is provided with a material receiving notch that penetrates its side and top, the worktable is provided with a through hole in the vertical direction that communicates with the material receiving notch, and the turntable can rotate to the position where the material receiving port is above the through hole. A push rod that can slide through the material receiving notch to the through hole is slidably provided in the material receiving seat.

[0007] In practice, nuts are conveyed using a nut vibratory feeder, while copper tubes are conveyed using a copper tube vibratory feeder, with the shoulder end as the lower end. The discharge port of the copper tube vibratory feeder is aligned with the receiving groove, and the through holes and punches are circumferentially distributed around the center line of the turntable. Initially, the turntable is positioned with one of the receiving ports aligned with the discharge port of the nut vibratory feeder, and the nut vibratory feeder feeds the nut into the receiving port. Next, the turntable rotates until the receiving port is located at the through hole (at this time, the through hole is directly below the receiving port), and the copper tube vibratory feeder feeds the copper tube with the shoulder end as the lower end into the receiving notch. Then, the push rod pushes the copper tube located in the receiving notch upwards out of the through hole, and the copper tube passes through the nut, forming a nested fit. The upper part of the copper tube extends upwards out of the turntable. Next, the turntable continues to rotate in the same direction until the receiving port is located at the punch, and the punch is controlled to move down to flare the upper end of the copper tube. Through the above settings, this flaring device not only automatically attaches nuts to the copper tube, but also completes the flaring of the copper tube after the nuts are automatically attached, greatly improving production efficiency.

[0008] In the above-mentioned flaring device, an arc-shaped limiting plate is fixed on the worktable and is concentrically arranged with the turntable. The arc-shaped limiting plate is arranged on the edge of the turntable and there is a gap between the two along the radial direction of the turntable. One end of the arc-shaped limiting plate is located at the position of the punch, and the through hole is located between the two ends of the arc-shaped limiting plate along the circumference of the turntable.

[0009] One end of the arc-shaped limiting plate is located at the punch position, and the other end of the arc-shaped limiting plate is set at the discharge port of the nut vibrating plate. The through hole is located between the two ends of the arc-shaped limiting plate along the circumference of the turntable. In this way, from receiving the nut at the receiving port to the copper tube passing through the nut and then to the copper tube being located below the punch, the arc-shaped limiting plate will limit the product located in the receiving port. This can prevent the product from being thrown out directly during the rotation of the turntable, thereby improving production efficiency and ensuring the reliability of this flaring device.

[0010] In the above-mentioned flaring device, the workbench is provided with a positioning hole concentric with the center line of the punch. The positioning hole is located between the arc-shaped limiting plate and the turntable. The positioning hole is provided with a positioning head that can move up and down, and the positioning head can move up until its upper end face is flush with the surface of the upper end opening of the positioning hole.

[0011] A positioning hole is set on the worktable according to the position of the receiving port below the punch. A positioning head, controlled by a positioning cylinder, is installed in the positioning hole. The positioning hole is located between the arc-shaped limiting plate and the turntable. When the receiving port moves to the position below the punch, the positioning cylinder controls the positioning head to move downward to open the upper end of the positioning hole, so that the lower end of the copper tube in the receiving port can be inserted into the positioning hole for positioning. At the same time, the product is still restricted between the turntable and the arc-shaped limiting plate. In other words, the cooperation between the arc-shaped limiting plate and the turntable, together with the use of the positioning hole, forms a clamp-like function. In this way, the copper tube is firmly positioned when the upper end is flared, thus ensuring the flaring accuracy. This makes the flaring device both efficient and reliable.

[0012] In the above-mentioned flaring device, the arc-shaped limiting plate includes a plate body one and a plate body two, both of which are arc-shaped. The plate body two is higher than the plate body one. The upper side of one end of the plate body one abuts against the lower side of the lower end of the plate body two. The through hole is located inside the connection between the plate body one and the plate body two. The positioning hole is located between the other end of the plate body two and the turntable.

[0013] As the turntable rotates, moving the receiving port from the receiving nut position to the through hole position, the lower plate first limits the nuts to prevent them from flying out. As the turntable rotates, moving the receiving port from the through hole position to the positioning hole position, the higher plate second limits the copper tube to prevent the joined copper tube and nuts from flying out. Simultaneously, after the receiving port reaches the positioning hole, the copper tube is directly restrained between the turntable and plate second, with the shouldered end of the copper tube falling into the positioning hole, further ensuring the flaring accuracy of the copper tube.

[0014] There will be an assembly gap between the copper tube and the nut. If the nut is still used to limit the position here, then the only thing that can play a positioning role when the copper tube is flared is the positioning hole. However, the fit depth between the end of the copper tube with the shoulder and the positioning hole is relatively shallow, making it difficult to achieve a good positioning effect in practice.

[0015] In the above-mentioned flaring device, the receiving port includes a port one and a port two from bottom to top. The inner top wall of port one and the inner side wall of port two are connected to form a shoulder. The height of plate one corresponds to that of port one, and the height of plate two corresponds to that of port two.

[0016] The receiving port is designed with two sections, from bottom to top: section one for positioning the nut and section two for partially locking the copper tube inside after it passes through the nut. The inner top wall of section one connects with the inner side wall of section two to form a shoulder. This design prevents the nut from being pushed out of the receiving port along with the copper tube as it passes upwards, thus improving production efficiency while ensuring the reliability of the copper tube and nut assembly.

[0017] In the aforementioned flaring device, the receiving notch includes a receiving hole that penetrates the upper surface of the receiving seat and a receiving groove that is laterally connected to the receiving hole and penetrates the side of the receiving seat. The through hole and the receiving hole are arranged along the same center line.

[0018] The receiving groove serves as a guide for the copper tube to be fed into the receiving hole, while the receiving hole provides a certain guiding function for the copper tube to pass through the through hole. This ensures the reliability of the flaring device, which uses a copper tube with a shoulder at the bottom to pass upward through the nut to assemble the two into a sleeve relationship.

[0019] In the aforementioned flaring device, the receiving seat is provided with several elastic positioning elements that surround the receiving hole and are all partially located within the receiving hole at a position higher than the receiving groove.

[0020] During the process of the pusher pushing the copper tube out, each elastic positioning element first contacts the outer wall of the copper tube. Through the action of these elements, the copper tube and the through hole remain concentric (when the copper tube moves to the point where the shoulder abuts against the elastic positioning elements, the shoulder will push the elastic positioning elements apart), allowing the copper tube to pass smoothly through the nut. This allows the flaring device to integrate the function of fitting the copper tube with the nut to improve production efficiency while further ensuring assembly reliability. Especially when the copper tube is initially pushed upwards, the lower end of the copper tube can be positioned by the shoulder engaging with the inner diameter of the receiving hole, while the upper end is positioned using the elastic positioning elements. This ensures that the coaxiality of the copper tube and the through hole is maintained very well.

[0021] In the above-mentioned flaring device, the elastic positioning element includes a spring and an actuating element. The actuating element extends into the receiving hole under the elastic force of the spring, and the outer surface of the actuating element located in the receiving hole is spherical.

[0022] Each component, under the elastic force of the spring, extends into the receiving hole and works together to position the copper tube during its ejection, ensuring assembly reliability. The outer surface of the component located within the receiving hole is spherical, ensuring line contact between the elastic positioning component and the outer wall of the copper tube. This provides positioning for the outer wall of the copper tube, ensuring assembly reliability, while preventing scratches. Furthermore, the spherical shape allows it to be naturally pushed outward when in contact with the shoulder at the lower end of the copper tube, without creating excessive resistance to the shoulder's passage.

[0023] In the above-mentioned flaring device, the actuating element is a steel ball, or the actuating element is a cylindrical pin with a spherical surface at one end.

[0024] In the above-mentioned flaring device, an arc-shaped material guide bar is fixed on the worktable and arranged on the edge of the turntable. The worktable has a material dropping notch. One end of the material guide bar is located at the position of the punch and is adjacent to the end of the arc-shaped limiting plate located at the position of the punch. The other end of the material guide bar is located at the material dropping notch. The distance from the material guide bar to the center line of the turntable gradually increases from the end of the material guide bar located at the position of the punch to the end of the material guide bar located at the material dropping notch.

[0025] Because one end of the feeding guide is located at the punch and adjacent to the end of the arc-shaped limiting plate at the punch location, while the other end of the feeding guide is located at the discharge notch, the distance from the feeding guide to the turntable centerline gradually increases from the end of the feeding guide at the punch location to the end of the feeding guide at the discharge notch. Therefore, after the flaring of the upper end of the copper tube is completed, as the turntable continues to rotate, the product located at the receiving port will gradually and automatically detach from the receiving port and move along the feeding guide until it falls from the discharge notch for discharge. Through the above settings, this flaring device achieves automatic nut fitting, automatic flaring of the copper tube, and automatic discharge after flaring, further improving production efficiency.

[0026] Compared with existing technologies, this flaring device has the following advantages:

[0027] 1. By fixing a receiving seat at the bottom of the workbench, the receiving seat is provided with a receiving notch that runs through its side and top. The workbench has a through hole that connects to the receiving notch in the vertical direction. The turntable rotates in the same direction so that the same receiving port can pass through the through hole and the punch in sequence. When the receiving port is located at the position of the through hole, the through hole is located directly below the receiving port. A push rod that can slide through the receiving notch to the through hole is slidably installed in the receiving seat. This makes the flaring device not only realize the function of automatically putting nuts on copper tubes, but also complete the work of flaring copper tubes after automatically putting nuts on them, which greatly improves production efficiency.

[0028] 2. By setting up a feeding guide bar, the copper tube can be automatically fed after the end is flared, which further improves production efficiency.

[0029] 3. By setting up elastic positioning components around the receiving hole and partially located within the receiving hole in the receiving seat, the copper tube can be positioned during the pushing out process, thereby improving production efficiency while ensuring the reliability of the automatic connection between the copper tube and the nut. Attached Figure Description

[0030] Figure 1 This is a three-dimensional schematic diagram of the flaring device.

[0031] Figure 2 This is a three-dimensional schematic diagram of the flaring device from another angle.

[0032] Figure 3 This is a front view of the flaring device.

[0033] Figure 4 yes Figure 3 Sectional view along the AA direction.

[0034] Figure 5 This is an exploded view of the flaring device.

[0035] Figure 6 This is a three-dimensional schematic diagram of the turntable and worktable in this flaring device.

[0036] Figure 7 This is a 3D schematic diagram of the mounting plate.

[0037] Figure 8 yes Figure 4 A magnified view of a portion of point A in the middle.

[0038] Figure 9 This is a top view of the turntable and worktable in this flaring device.

[0039] Figure 10 yes Figure 9 Sectional view along the BB direction.

[0040] Figure 11 This is a three-dimensional schematic diagram of the flaring device used in conjunction with a nut vibratory plate and a copper tube vibratory plate.

[0041] Figure 12 This is a cross-sectional view of the material receiving area within the receiving notch.

[0042] Figure 13 This is a cross-sectional view of the copper tube being pushed out by the push rod.

[0043] Figure 14 This is a cross-sectional view showing how the push rod pushes the copper tube out of the through hole to complete the connection between the copper tube and the nut.

[0044] Figure 15 It is a cross-sectional view of the copper tube located below the punch and before flaring.

[0045] In the diagram, 1. Punch press; 1a. Machine base; 1a1. Mounting surface; 1b. Punch; 2. Worktable; 2a. Through hole; 2b. Blanking notch; 3. Turntable; 3a. Receiving port; 3a1. Port 1; 3a2. Port 2; 3a3. Shoulder; 4. Cam divider; 5. Receiving seat; 5a. Receiving notch; 5a1. Receiving hole; 5a2. Receiving groove; 5b. Mounting hole; 6. Push rod; 6a. Limiting protrusion; 7. Push cylinder; 8. Elastic positioning element; 8a. Actuating element; 8b. Spring; 9. 10. End cap; 10. Arc-shaped limiting plate; 10a. Plate body one; 10b. Plate body two; 11. Limiting block; 12. Limiting groove; 13. Positioning hole; 14. Insert block; 15. Positioning head; 16. Positioning cylinder; 17. Feeding guide bar; 18. Feeding chute; 19. Connecting bracket; 20. Feeding cylinder; 21. Auxiliary feeding hook; 22. Mounting plate; 23. Mounting bracket; 24. Mounting base; 25. Nut vibratory feeder; 26. Copper tube vibratory feeder; 27. Nut; 28. Copper tube; 28a. Shoulder. Detailed Implementation

[0046] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0047] Example 1

[0048] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 9 and Figure 10As shown, the flaring device includes a punch press 1 with a base 1a and a punch 1b. A worktable 2 is fixed on the base 1a below the punch 1b. A rotatable turntable 3 is provided on the worktable 2, and the downward projection of the punch 1b is located at the edge of the turntable 3. A cam divider 4 is fixed on the base 1a below the worktable 2. The output end of the cam divider 4 passes through the worktable 2 and is fixedly connected to the turntable 3. The turntable 3 is driven to rotate by the cam divider 4 and is positioned after rotating through the same angle each time. At least one receiving port 3a is provided on the edge of the turntable 3. In this embodiment, there are four receiving ports 3a, which are evenly distributed on the edge of the turntable 3. A receiving seat 5 is fixed at the bottom of the worktable 2. The receiving seat 5 has a receiving notch 5a that penetrates its side and top. The worktable 2 has a through hole 2a communicating with the receiving notch 5a in the vertical direction. The turntable 3 can rotate so that the receiving port 3a is directly above the through hole 2a and can rotate so that the receiving port 3a is directly below the punch 1b. A push rod 6 is slidably disposed within the receiving seat 5, extending through the receiving notch 5a to the through hole 2a. Specifically, a mounting base 24 is fixedly connected to the bottom of the receiving seat 5, and a push cylinder 7 is fixedly mounted on the mounting base 24. The lower end of the push rod 6 is fixedly connected to the upper end of the piston rod of the push cylinder 7. The outer side of the lower end of the push rod 6 has a limiting protrusion 6a. When the limiting protrusion 6a abuts against the bottom surface of the receiving seat 5, the upper end surface of the push rod 6 is flush with the surface where the upper end of the through hole 2a is located. The receiving notch 5a includes a receiving hole 5a1 penetrating the upper end surface of the receiving seat 5 and a receiving groove 5a2 that communicates laterally with the receiving hole 5a1 and penetrates the side of the receiving seat 5. The through hole 2a and the receiving hole 5a1 are arranged along the same center line. The receiving groove 5a2 has a rectangular cross-section along the axial direction of the push rod 6, with its long side parallel to the axis of the push rod 6. The receiving hole 5a1 is a circular hole, and the inner diameter of the receiving hole 5a1 is the same as the width of the cross-section of the receiving groove 5a2 along the axial direction of the push rod 6. The receiving base 5 has several elastic positioning elements 8 arranged around the receiving hole 5a1 and partially located within the receiving hole 5a1, at a position higher than the receiving groove 5a2. Specifically, the receiving base 5 has several mounting holes 5b distributed around the receiving hole 5a1. One end of the mounting hole 5b communicates with the receiving hole 5a1, and the other end of the mounting hole 5b penetrates through the side of the receiving base 5. The center lines of all mounting holes 5b are at the same height. The elastic positioning element 8 includes a spring 8b and an actuating element 8a disposed within the mounting hole 5b. A plug 9 is internally threaded to one end of the mounting hole 5b that penetrates through the side of the receiving base 5. The two ends of the spring 8b act on the plug 9 and the actuating element 8a, respectively. The actuating element 8a partially extends out of the mounting hole 5b into the receiving hole 5a1, and the outer surface of the actuating element 8a located within the receiving hole 5a1 is spherical. In this embodiment, the actuating element 8a is a steel ball.

[0049] Furthermore, such as Figures 1-6 as well as Figures 8-10As shown, an arc-shaped limiting plate 10, concentrically arranged with the turntable 3, is fixed on the worktable 2. The arc-shaped limiting plate 10 is arranged on the edge of the turntable 3, and there is a gap between the two along the radial direction of the turntable 3. One end of the arc-shaped limiting plate 10 is located at the position of the punch 1b, and the through hole 2a is located between the two ends of the arc-shaped limiting plate 10 along the circumference of the turntable 3. A limiting block 11 is fixed on the worktable 2. The limiting block 11 and the other end of the arc-shaped limiting plate 10 cooperate to form a limiting groove 12. The limiting groove 12 is arranged along the radial direction of the turntable 3, and the through hole 2a is located between the limiting groove 12 and the punch 1b along the circumference of the turntable 3. A positioning hole 13 is provided on the worktable 2, concentrically arranged with the center line of the punch 1b. The positioning hole 13 is located between the arc-shaped limiting plate 10 and the turntable 3. A positioning head 15 that can move up and down is provided in the positioning hole 13, and the positioning head 15 can move up until its upper end face is flush with the upper end opening of the positioning hole 13. A positioning cylinder 16 is fixed to the bottom of the worktable 2, and a positioning head 15 is fixedly connected to the piston rod end of the positioning cylinder 16. The worktable 2 has an inlay hole, and an annular insert 14 is fixed in the inlay hole. The positioning hole 13 is the center hole of the insert 14. In this embodiment, the arc-shaped limiting plate 10 includes a first plate 10a and a second plate 10b, both of which are arc-shaped. The second plate 10b is higher than the first plate 10a. The upper side of one end of the first plate 10a abuts against the lower side of one end of the second plate 10b. The through hole 2a is located inside the connection between the first plate 10a and the second plate 10b. The positioning hole 13 is located between the other end of the second plate 10b and the turntable 3. The limiting groove 12 is located between the other end of the first plate 10a and the limiting block 11. The receiving port 3a includes a first port 3a1 and a second port 3a2 from bottom to top. The inner top wall of the first port 3a1 is connected to the inner side wall of the second port 3a2 to form a shoulder 3a3. The lower port of the second port 3a2 is outwardly flared. The height of the first plate 10a corresponds to the height of the first port 3a1, and the height of the second plate 10b corresponds to the height of the second port 3a2.

[0050] Furthermore, such as Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7 , Figure 9 and Figure 10An arc-shaped feeding guide 17 is fixed on the worktable 2 and arranged on the edge of the turntable 3. The worktable 2 has a feeding notch 2b. The output end of the cam divider 4 passes through the feeding notch 2b. One end of the feeding guide 17 is located at the punch 1b and is adjacent to the end of the arc-shaped limiting plate 10 located at the punch 1b. The other end of the feeding guide 17 is located at the feeding notch 2b. The distance from the feeding guide 17 to the center line of the turntable 3 gradually increases from the end of the feeding guide 17 located at the punch 1b to the end of the feeding guide 17 located at the feeding notch 2b. A feeding chute 18 is fixed below the feeding notch 2b on the machine base 1a. The feeding chute 18 is located between the limiting groove 12 and the punch 1b along the circumference of the turntable 3. A connecting bracket 19 is fixed between the turntable 3 and the unloading chute 18 on the machine base 1a. A unloading cylinder 20 is fixed on the connecting bracket 19. The piston rod of the unloading cylinder 20 is arranged radially along the turntable 3, and an auxiliary unloading hook 21 is fixedly connected to the end of the piston rod of the unloading cylinder 20. The claw part of the auxiliary unloading hook 21 is located above the turntable 3. The side of the machine base 1a has a mounting surface 1a1 perpendicular to the worktable 2 below the worktable 2. A mounting plate 22 is fixed parallel to the mounting surface 1a1. A mounting bracket 23 is fixedly connected to one side of the mounting plate 22. The cam divider 4 is fixedly connected to the mounting bracket 23. The unloading chute 18 and the connecting bracket 19 are both fixedly connected to the mounting plate 22. The mounting plate 22 is provided with several horizontally arranged strip-shaped adjustment grooves. The mounting plate 22 and the machine base 1a are fixed by screws through which the rod passes through the strip-shaped adjustment grooves and is threaded into the side of the machine base 1a. The feeding guide 17 is connected to several connecting pieces. Each connecting piece is provided with a strip-shaped connecting groove arranged radially along the turntable 3. The feeding guide 17 and the worktable 2 are fixed by screws that pass through the strip-shaped connecting grooves and are threaded into the worktable 2.

[0051] In practice, such as Figure 11 As shown, the nut 27 is conveyed by the nut vibrating plate 25, and the outlet of the nut vibrating plate 25 is connected to the limiting groove 12. The copper tube 28 is conveyed by the copper tube vibrating plate 26 with the end where the shoulder 28a is located as the lower end, and the outlet of the copper tube vibrating plate 26 is connected to the receiving groove 5a2.

[0052] Initially, the turntable 3 is positioned with one of the receiving ports 3a aligned with the limiting groove 12. The nut vibrating plate 25 feeds the nut 27 through the limiting groove 12 into the opening 3a1 of the receiving port 3a. Next, the turntable 3 rotates until the receiving port 3a is positioned at the through hole 2a (at this time, the through hole 2a is directly below the receiving port 3a). The copper tube vibrating plate 26 feeds the copper tube 28, with the shoulder 28a as the lower end, through the receiving groove 5a2 into the receiving hole 5a1. This state is as follows. Figure 12As shown. Then, the push rod 6 pushes the copper tube 28 located in the receiving hole 5a1 upward out of the through hole 2a. The copper tube 28 will pass through the nut 27, forming a sleeve-like fit between the two. The upper part of the copper tube 28 will extend upward out of the turntable 3 through the opening 3a2. This state is as follows. Figure 14 As shown. During the process of the copper tube 28 being pushed out of the receiving hole 5a1 by the push rod 6, as... Figure 13 As shown, each elastic positioning element 8 first contacts the outer wall of the copper tube 28. Through the action of each elastic positioning element 8, the copper tube 28 and the through hole 2a are kept concentric and will not be skewed (when the copper tube 28 moves to the shoulder 28a and abuts against each elastic positioning element 8, the shoulder 28a will push each elastic positioning element 8 to the sides), so that the copper tube 28 can pass smoothly through the nut 27 to ensure the reliability of the assembly.

[0053] Next, the turntable 3 continues to rotate in the same direction until the receiving port 3a is located at the punch 1b, and the punch 1b is controlled to move downward to flare the upper end of the copper tube 28. From the moment the receiving port 3a receives the nut 27 until the copper tube 28 passes through the nut 27 and is located below the punch 1b, the arc-shaped limiting plate 10 will limit the product located in the receiving port 3a to prevent it from being thrown out during the rotation of the turntable 3. In practice, a positioning hole 13 is set on the worktable 2 according to the position of the receiving port 3a below the punch 1b, and a positioning head 15, controlled by a positioning cylinder 16, is set in the positioning hole 13. When the receiving port 3a moves to the position below the punch 1b, the positioning cylinder 16 controls the positioning head 15 to move downward, opening the upper end of the positioning hole 13, so that the lower end of the copper tube 28 located in the receiving port 3a can be inserted into the positioning hole 13 for positioning to ensure flaring accuracy. This state is as follows: Figure 15 As shown. After the flaring is completed, the positioning cylinder 16 controls the positioning head 15 to move upward, pushing the lower end of the copper tube 28 out of the positioning hole 13, so that the turntable 3 can drive the copper tube 28, which is fitted with the nut 27 and has completed the upper flaring, to continue moving. Since one end of the feeding guide 17 is located at the punch 1b and is adjacent to the end of the arc-shaped limiting plate 10 located at the punch 1b, and the other end of the feeding guide 17 is located at the dropping notch 2b, the distance from the feeding guide 17 to the center line of the turntable 3 gradually increases from the end of the feeding guide 17 located at the punch 1b to the end of the feeding guide 17 located at the dropping notch 2b. Therefore, as the turntable 3 continues to rotate, the product located at the receiving port 3a will gradually and automatically come out of the receiving port 3a and move along the feeding guide 17 until it falls from the dropping notch 2b onto the feeding chute 18 for discharge. Of course, if the product is stuck too tightly in the receiving port 3a, the auxiliary feeding hook 21 can be used to hook the product out of the receiving port 3a for feeding when the turntable 3 rotates to the position of the receiving port 3a at the auxiliary feeding hook 21.

[0054] Example 2

[0055] The structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference is that in this embodiment, the active element 8a is a cylindrical pin with a spherical surface at one end.

[0056] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A flaring device, comprising a punch press (1) having a base (1a) and a punch (1b), wherein a worktable (2) is fixed on the base (1a) below the punch (1b) and a rotatable turntable (3) is provided on the worktable (2), the downward projection of the punch (1b) is located at the edge of the turntable (3), and at least one receiving port (3a) is provided at the edge of the turntable (3), characterized in that, The workbench (2) is fixed with a receiving seat (5) at the bottom. The receiving seat (5) has a receiving notch (5a) that runs through its side and top. The workbench (2) has a through hole (2a) that communicates with the receiving notch (5a) in the vertical direction. The turntable (3) can rotate to the position of the receiving port (3a) above the through hole (2a). A push rod (6) that can extend through the receiving notch (5a) to the through hole (2a) is slidably arranged inside the receiving seat (5). An arc-shaped limiting plate (10) that is concentric with the turntable (3) is fixed on the workbench (2). The workbench (2) is provided with a punch. (1b) A positioning hole (13) is set concentrically on the center line. The positioning hole (13) is located between the arc-shaped limiting plate (10) and the turntable (3). A positioning head (15) that can move up and down is provided in the positioning hole (13). The positioning head (15) can move up to its upper end face and be flush with the upper end face of the positioning hole (13). The receiving notch (5a) includes a receiving hole (5a1) that penetrates the upper end face of the receiving seat (5) and a receiving groove (5a2) that is laterally connected to the receiving hole (5a1) and penetrates the side of the receiving seat (5). The through hole (2a) and the receiving hole (5a1) are set on the same center line.

2. The flaring device according to claim 1, characterized in that, An arc-shaped limiting plate (10) is arranged on the edge of the turntable (3) and there is a gap between them along the radial direction of the turntable (3). One end of the arc-shaped limiting plate (10) is located at the position of the punch (1b), and the through hole (2a) is located between the two ends of the arc-shaped limiting plate (10) along the circumference of the turntable (3).

3. The flaring device according to claim 1, characterized in that, The arc-shaped limiting plate (10) includes a plate body one (10a) and a plate body two (10b) that are both arc-shaped. The plate body two (10b) is higher than the plate body one (10a). The upper side of one end of the plate body one (10a) abuts against the lower side of the lower end of the plate body two (10b). The through hole (2a) is located inside the connection between the plate body one (10a) and the plate body two (10b). The positioning hole (13) is located between the other end of the plate body two (10b) and the turntable (3).

4. The flaring device according to claim 3, characterized in that, The receiving port (3a) includes a first port (3a1) and a second port (3a2) from bottom to top. The inner top wall of the first port (3a1) and the inner side wall of the second port (3a2) are connected to form a shoulder (3a3). The height of the first plate (10a) corresponds to the height of the first port (3a1), and the height of the second plate (10b) corresponds to the height of the second port (3a2).

5. The flaring device according to claim 1, characterized in that, The receiving seat (5) is provided with several elastic positioning elements (8) arranged around the receiving hole (5a1) and partially located in the receiving hole (5a1) at a position higher than the receiving groove (5a2).

6. The flaring device according to claim 5, characterized in that, The elastic positioning member (8) includes a spring (8b) and an actuating member (8a). The actuating member (8a) is partially inserted into the receiving hole (5a1) under the elastic force of the spring (8b). The outer surface of the actuating member (8a) located in the receiving hole (5a1) is spherical.

7. The flaring device according to claim 6, characterized in that, The actuating element (8a) is a steel ball, or the actuating element (8a) is a cylindrical pin with a spherical surface at one end.

8. The flaring device according to claim 2, characterized in that, The workbench (2) is also fixed with an arc-shaped feeding guide (17) arranged on the edge of the turntable (3). The workbench (2) has a feeding notch (2b). One end of the feeding guide (17) is located at the position of the punch (1b) and is adjacent to the end of the arc-shaped limiting plate (10) located at the position of the punch (1b). The other end of the feeding guide (17) is located at the feeding notch (2b). The distance from the feeding guide (17) to the center line of the turntable (3) gradually increases from the end of the feeding guide (17) located at the position of the punch (1b) to the end of the feeding guide (17) located at the feeding notch (2b).

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