An air conditioner copper pipe flaring and dimpling device

Abstract

The present application discloses a device for flaring and dimple punching of air-conditioning copper pipes, which mainly consists of a positioning die, a flaring head, a flaring sleeve, a connecting seat, a connecting sleeve, an elastic member, a sensing member, a one-way bearing, a deburring rod, a deburring scraper, a floating cutter head, a limiting rope, an adjusting knob, a spring, a threaded cavity, a limiting protrusion, a conveying member, a dimple punching ram, a demoulding ejector rod, a positioning rod, and a copper pipe. The present invention provides a device for flaring and dimple punching of air-conditioning copper pipes. By using the pressure of stamping to drive the deburring rod to rotate, the deburring operation before flaring is realized, the burrs of the flared bell mouth are reduced, and the sealing performance after the connection of the copper pipe is ensured. Secondly, by restricting the maximum movement amount and the maximum stamping pressure of the flaring sleeve, over-stamping of the bell mouth is avoided, the wall thickness at the position of the bell mouth is appropriate, and it has appropriate structural strength, improving the service life of the copper pipe and reducing the probability of breakage at the copper pipe interface.

Description

Technical Field

[0001] This application relates to the technical field of air-conditioning copper pipe connection equipment, and particularly to a device for flaring and dimpling of air-conditioning copper pipes. Background Art

[0002] When processing the joints of the copper pipes of an air conditioner, two processes of flaring and punching positioning points are required. Generally speaking, these two processes need to be processed at two workstations respectively. However, in order to improve the processing efficiency, some enterprises will flare and punch positioning points simultaneously in the same mold.

[0003] When flaring the copper pipe, it is generally formed by stamping with a cylinder. Generally speaking, the pressure provided by the stamping pressure of the cylinder can flatten the burrs. However, in many cases, there are still burrs. And the air-conditioning copper pipe joint has high requirements for sealing. In reality, due to excessive burrs at the flared end, the sealing at the connection is affected, resulting in refrigerant leakage. Therefore, it is necessary to deburr the through port when flaring the copper pipe.

[0004] Secondly, when the stamping pressure is too high, the pipe wall at the flared end of the copper pipe will become too thin, and its structural strength will decrease, and it is very easy to break during use, resulting in refrigerant leakage. Therefore, it is also necessary to control the wall thickness at the flared end. Summary of the Invention

[0005] This application provides a device for flaring and dimpling of air-conditioning copper pipes, which can remove burrs while flaring and ensure an appropriate wall thickness at the flared end, so as to solve the problem of easy leakage at the connection of air-conditioning copper pipes.

[0006] To achieve the above object, this application adopts the following technical solution: A device for flaring and dimpling of air-conditioning copper pipes includes a positioning mold, a flaring head, a conveying member, a dimple punching head and a demolding ejector rod. The dimple punching heads are located on both sides of the positioning mold, the flaring head is located above the positioning mold, the conveying member conveys the copper pipes into the positioning mold one by one, and the demolding ejector rod ejects the processed copper pipes.

[0007] The flaring head includes a flaring sleeve connected to a cylinder. The flaring sleeve has a threaded cavity, and a deburring rod is movably connected to the threaded cavity through a one-way bearing. When the one-way bearing moves upward relative to the flaring sleeve, it drives the deburring rod to rotate. A spring is provided between the threaded cavity and the one-way bearing, and an R angle for flaring is provided at the end of the flaring sleeve.

[0008] Further, a positioning rod is provided in the positioning mold, and a spherical protrusion is provided at the top of the positioning rod and can abut against the bottom of the deburring rod.

[0009] Further, the deburring scraper can retract when the pressure is greater than a certain value.

[0010] Furthermore, the deburring scraper includes two floating cutter heads movably connected to the deburring rod, and springs are provided on the two floating cutter head brackets.

[0011] Furthermore, limiting ropes are fixedly connected to both of the two floating cutter heads, and an adjusting knob that can be screwed in or out is movably connected to the deburring rod, and both of the two limiting ropes are fixedly connected to the adjusting knob.

[0012] Furthermore, a limiting protrusion for preventing the flaring sleeve from moving is provided at the bottom of the deburring rod. When the flaring sleeve is blocked by the limiting protrusion, the bell mouth of the copper pipe is exactly pressed to the target wall thickness.

[0013] Furthermore, the flaring sleeve includes a connecting seat fixedly connected to the air cylinder and a connecting sleeve connected to the deburring rod, and an elastic member is provided between the connecting sleeve and the connecting seat.

[0014] Furthermore, a sensing member is provided between the connecting sleeve and the connecting seat, and the sensing member is arranged on the side facing away from the elastic member. When the pressure of the sensing member is less than the threshold value, the air cylinder connecting the flaring head is triggered to stop running.

[0015] A device for flaring and denting the bell mouth of an air-conditioning copper pipe provided by the present application realizes the deburring operation before flaring by driving the deburring rod to rotate by using the pressure of stamping, reduces the burrs on the bell mouth after flaring, and ensures the sealing performance after the connection of the copper pipe.

[0016] Secondly, by limiting the maximum movement amount and the maximum stamping pressure of the flaring sleeve, over-stamping of the bell mouth is avoided, the wall thickness at the position of the bell mouth is ensured to be appropriate, with appropriate structural strength, the service life of the copper pipe is improved, and the breaking probability at the interface of the copper pipe is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings forming a part of the specification depict the embodiments disclosed in the present application and, together with the specification, are used to explain the principles disclosed in the present application.

[0018] Referring to the drawings, the present disclosure can be more clearly understood from the following detailed description, wherein:

[0019] Figure 1 is a schematic structural diagram of the flaring head in Embodiment 1 of the present invention;

[0020] Figure 2 is a three-dimensional structural diagram of Embodiment 1 of the present invention;

[0021] Figure 3 is a front view of Embodiment 1 of the present invention;

[0022] Figure 4 is a schematic diagram of the deburring scraper in Embodiment 1 of the present invention;

[0023] Figure 5 This is a schematic diagram of the flaring sleeve in the second embodiment of the present invention.

[0024] In the figure: 1, positioning die; 2, flaring head; 21, flaring sleeve; 211, connecting seat; 212, connecting sleeve; 213, elastic member; 214, sensing member; 22, one-way bearing; 23, deburring rod; 24, deburring scraper; 241, floating cutter head; 242, limiting rope; 243, adjusting knob; 25, spring; 26, threaded cavity; 27, limiting protrusion; 3, conveying member; 4, concave point punching head; 5, demolding ejector rod; 6, positioning rod; 7, copper tube. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0026] Embodiment 1

[0027] Please refer to Figures 1 - 3 , an air-conditioning copper tube flaring and concave point punching device, including a positioning die 1, a flaring head 2, a conveying member 3, a concave point punching head 4 and a demolding ejector rod 5. The concave point punching head 4 is located on both sides of the positioning die 1, the flaring head 2 is located above the positioning die 1, the conveying member 3 conveys the copper tubes 7 one by one into the positioning die 1, and the demolding ejector rod 5 ejects the processed copper tubes 7. The flaring head 2 and the concave point punching head 4 are both driven by air cylinders. The conveying member 3 includes a vibrating disk feeder and a slider. The conveying member 3 vertically inputs the copper tubes 7 into the slider. When the slider slides and aligns with the processing hole of the positioning die 1, the copper tubes 7 fall into the positioning die 1. The slider is also driven by an air cylinder. The above is the existing well-known technology, and the specific structure will not be described in detail;

[0028] The flaring head 2 includes a flaring sleeve 21 connected to the cylinder. The flaring sleeve 21 moves vertically under the action of the cylinder. The flaring sleeve 21 has a threaded cavity 26. A deburring rod 23 is movably connected to the threaded cavity 26 through a one-way bearing 22. The outer ring of the one-way bearing 22 is threadedly connected to the inner wall of the threaded cavity 26, and the inner ring of the one-way bearing 22 is fixedly connected to the deburring rod 23. When the one-way bearing 22 moves upward relative to the flaring sleeve 21, it drives the deburring rod 23 to rotate. When the one-way bearing 22 moves downward relative to the flaring sleeve 21, the deburring rod 23 does not rotate. A spring 25 is provided between the threaded cavity 26 and the one-way bearing 22. When the flaring sleeve 21 is lifted, the one-way bearing 22 moves downward under the action of the spring 25, causing the deburring rod 23 to extend. A deburring cutter 24 is provided at the bottom of the deburring rod 23. When the flaring sleeve 21 moves towards the copper tube 7, the deburring cutter 24 rotates along the inner wall of the copper tube 7 to remove the burrs on the inner wall of the copper tube 7. An R angle for flaring is provided at the end of the flaring sleeve 21. As the flaring sleeve 21 gets closer, the R angle contacts the copper tube 7 to complete the flaring.

[0029] When processing the copper tube 7, after the sleeve is fed into the positioning die 1, the dimple punching head 4 moves to complete dimple punching from the side. The dimple punching head 4 maintains its position to perform preliminary positioning on the copper tube 7 to prevent the copper tube 7 from rotating. At this time, the deburring cutter 24 is pressed against the inner wall of the copper tube 7. Under pressure, the one-way bearing 22 rotates and drives the deburring rod 23 to rotate to complete deburring. To ensure that the rotation amount is sufficient to remove the burrs, the deburring rod 23 and the threaded cavity 26 can be set long enough, or the rotation turns can be increased by repeatedly lifting and lowering the flaring sleeve 21. As the flaring sleeve 21 gets closer, the R angle on the flaring sleeve 21 contacts the end of the copper tube 7 and completes the flaring. After the flaring is completed, the flaring head 2 and the dimple punching head 4 are reset under the action of the cylinder, and the ejection ejector rod 5 ejects the copper tube 7 under the action of the cylinder and resets after the blanking is completed.

[0030] Please refer to Figure 1 , a positioning rod 6 is provided in the positioning die 1. When the copper tube 7 is placed in the positioning die 1, it will be sleeved on the outer side wall of the positioning rod 6. The ejection ejector rod 5 is a sleeve and is sleeved on the outer side wall of the positioning rod 6. The ejection ejector rod 5 moves along the positioning rod 6 to eject the copper tube 7. A spherical protrusion is provided at the top of the positioning rod 6 and can abut against the bottom of the deburring rod 23. The positioning rod 6 limits the depth of the deburring rod 23 inserted into the copper tube 7 to avoid the deburring rod 23 being inserted too deep. The spherical protrusion reduces the friction between the deburring rod 23 and the copper tube 7, facilitating the rotation of the deburring rod 23.

[0031] Please refer to Figure 4 , the deburring cutter 24 can retract after the pressure is greater than a certain value. On the one hand, it can retract into the flaring sleeve 21 without affecting the setting of the flaring sleeve 21. On the other hand, it can avoid cutting into the copper tube 7 during deburring and damaging the copper tube 7.

[0032] The deburring scraper 24 includes two groups of floating cutter heads 241 movably connected to the deburring rod 23. Springs are provided on the brackets of the two groups of floating cutter heads 241. When the external pressure is greater than the elastic force of the springs, the floating cutter heads 241 retract.

[0033] Two groups of floating cutter heads 241 are fixedly connected with limiting ropes 242 respectively. The deburring rod 23 is movably connected with an adjusting knob 243 that can be screwed in or out. Both of the two limiting ropes 242 are fixedly connected with the adjusting knob 243. When the adjusting knob 243 is screwed in, the floating cutter heads 241 can extend longer. When the adjusting knob 243 is screwed out, the maximum extension amount of the floating cutter heads 241 is smaller. By limiting the extension amount of the floating cutter heads 241, the maximum diameter of deburring is restricted to avoid too large an extension diameter and damage to the copper tube 7.

[0034] Please refer to Figure 1 , a limiting protrusion 27 for preventing the flaring sleeve 21 from moving is provided at the bottom of the deburring rod 23. The outer diameter of the limiting protrusion 27 is larger than the inner diameter of the bottom of the flaring sleeve 21. When the end of the flaring sleeve 21 moves to the position of the limiting protrusion 27, its movement will be blocked by the deburring rod 23. When the flaring sleeve 21 is blocked by the limiting protrusion 27, the bell mouth of the copper tube 7 is just pressed to the target wall thickness. The limiting protrusion 27 is close to the bottom of the deburring rod 23, and the bottom of the deburring rod 23 extends in by 1 - 2 millimeters, and the extending position is roughly flush with the bottom of the R corner of the positioning die 1.

[0035] Embodiment 2

[0036] In Embodiment 1, the wall thickness at the bell mouth is restricted by limiting the maximum movement amount of the flaring sleeve 21. In Embodiment 2, over - stamping is avoided by limiting the maximum punching pressure.

[0037] Please refer to Figure 5 , the flaring sleeve 21 includes a connecting seat 211 fixedly connected to the cylinder and a connecting sleeve 212 connected to the deburring rod 23. An elastic member 213 is provided between the connecting sleeve 212 and the connecting seat 211. The elastic member 213 is pre - compressed. Only when the pressure is greater than the pre - compressed pressure can the connecting sleeve 212 move. The connecting sleeve 212 and the connecting seat 211 are movably sleeved, and a limiting structure is provided at the bottom of the connecting seat 211 to prevent the connecting sleeve 212 from slipping out.

[0038] An induction member 214 is provided between the connecting sleeve 212 and the connecting seat 211. The induction member 214 can be a pressure sensor. The induction member 214 is arranged on the side opposite to the elastic member 213. As the pressure of the flaring sleeve 21 increases, the pressure sensed by the induction member 214 decreases. When the pressure of the induction member 214 is less than the threshold value, the cylinder for connecting the flaring head 2 is triggered to stop running. Each time flaring is performed, the maximum pressure tends to be consistent, making the wall thickness of the bell mouth tend to be consistent.

Claims

1. An air conditioner copper tube flaring and dimple punching device, comprising a positioning die (1), a flaring head (2), a conveying member (3), a dimple punching head (4) and a demolding ejector rod (5). The dimple punching head (4) is located on both sides of the positioning die (1), the flaring head (2) is located above the positioning die (1), the conveying member (3) conveys copper tubes (7) one by one into the positioning die (1), and the demolding ejector rod (5) ejects the processed copper tubes (7). It is characterized in that: The flaring head (2) includes a flaring sleeve (21) connected to a cylinder. The flaring sleeve (21) has a threaded cavity (26). The threaded cavity (26) is movably connected to a deburring rod (23) through a one-way bearing (22). When the one-way bearing (22) moves upward relative to the flaring sleeve (21), it drives the deburring rod (23) to rotate. A spring (25) is provided between the threaded cavity (26) and the one-way bearing (22). The end of the flaring sleeve (21) is provided with an R angle for flaring. A positioning rod (6) is provided in the positioning die (1). The top of the positioning rod (6) is provided with a spherical protrusion and can abut against the bottom of the deburring rod (23). The deburring scraper (24) includes two floating cutter heads (241) movably connected to the deburring rod (23). Springs are provided on the brackets of the two floating cutter heads (241). Both the upper and lower sides of the floating cutter heads (241) have inclined surfaces.

2. The air-conditioning copper tube flaring and dimple punching device according to claim 1, wherein, Both of the two floating cutter heads (241) are fixedly connected with limit ropes (242). The deburring rod (23) is movably connected with an adjusting knob (243) that can be screwed in or out. Both of the two limit ropes (242) are fixedly connected with the adjusting knob (243).

3. The air-conditioning copper tube flaring and dimple punching device according to claim 1, characterized in that, A limit protrusion (27) for preventing the movement of the flaring sleeve (21) is provided at the bottom of the deburring rod (23). When the flaring sleeve (21) is blocked by the limit protrusion (27), the flared mouth of the copper tube (7) is exactly punched to the target wall thickness.

4. The air-conditioning copper tube flaring and dimple punching device according to claim 1, wherein The flaring sleeve (21) includes a connecting seat (211) fixedly connected to the cylinder and a connecting sleeve (212) connected to the deburring rod (23). An elastic member (213) is provided between the connecting sleeve (212) and the connecting seat (211).

5. The air-conditioning copper tube flaring and dimple punching device according to claim 4, characterized in that, An inductive member (214) is provided between the connecting sleeve (212) and the connecting seat (211). The inductive member (214) is arranged on the side facing away from the elastic member (213). When the pressure of the inductive member (214) is less than the threshold value, the cylinder connecting the flaring head (2) is triggered to stop running.

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