Forming die convenient for cleaning internal copper sludge and used for processing internal-thread copper pipe

Abstract

The invention relates to the technical field of internal thread copper pipe forming dies, in particular to an internal thread copper pipe machining forming die convenient for cleaning internal copper sludge, which comprises a rotary sleeve with a spinning cavity and a connecting sleeve with a spinning cavity, a first spinning ring abutting against the inner circle of the connecting sleeve is arranged in the connecting sleeve, and a second spinning ring abutting against the inner circle of the first spinning ring is arranged in the connecting sleeve. A second spinning ring abutting against the inner circle of the rotary sleeve is arranged in the rotary sleeve, a check ring is formed on the inner wall of the connecting sleeve, a first spring is arranged between the check ring and the first spinning ring, and a second spring is arranged on the side, away from the steel balls, of the second spinning ring. The device has the beneficial effects that when internal threads of the copper pipe are machined, lubricating oil is sprayed to the contact position of the steel ball and the copper pipe through the oil spraying pipe, abrasion to the copper pipe is reduced, and meanwhile the lubricating oil and copper powder are mixed together under the action of centrifugal force and can be rapidly discharged into the protective cover through the oil discharging groove in the rotary sleeve; lubricating oil and copper sludge can be conveniently recycled, and meanwhile the situation that the lubricating oil splashes to pollute the working environment is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of internal thread copper tube forming dies, in particular to a forming die for processing internal thread copper tubes and convenient for cleaning internal copper mud. Background Art

[0002] At present, seamless internally threaded tubes are widely used to make heat exchangers in industries such as air conditioners, refrigerators, water heaters, and electronics. Seamless internally threaded tubes are produced using a multi-ball spinning process, which uses a spinning ring and steel balls to form a spinning mechanism with a certain inner diameter (inscribed circle R), which is clamped on the outside of the blank tube. A core head mold is installed inside the blank tube. The spinning mechanism rotates at high speed driven by a high-speed motor to roll the blank tube, pressing out continuous teeth of a certain size on the inner wall of the blank tube, thereby obtaining a seamless internally threaded round tube.

[0003] Chinese patent application number CN201310333988.9 discloses a novel internal threaded tube forming spinning device, including a rotary sleeve with a spinning cavity, a connecting sleeve connected to the rotary sleeve by multiple bolts, a steel ball, a first spinning ring arranged in the spinning cavity of the rotary sleeve and in contact with the inner wall of the rotary sleeve, a second spinning ring arranged in the spinning cavity of the rotary sleeve and forming a gap with the first spinning ring, the steel ball in contact with both the first spinning ring and the second spinning ring, the connecting sleeve in contact with the second spinning ring, a gasket for adjusting the gap size is provided between the rotary sleeve and the connecting sleeve, the rotary sleeve has a coaxial rotary sleeve part and a rotary sleeve part, the outer diameter of the rotary sleeve part is smaller than the outer diameter of the rotary sleeve part, a spinning cavity is formed on the rotary sleeve part, and the rotary sleeve part is connected to the connecting sleeve by multiple bolts. When the above patent is used, due to the large friction between the steel ball and the outer wall of the copper tube, a large amount of copper powder will be generated during the rotation of the copper tube. Although the copper powder can be discharged through the outer wall of the rotating sleeve, the friction between the steel ball and the copper tube will be increased during the generation of the copper powder, causing the temperature of the copper tube to rise. At this time, the rotating steel ball is more likely to squeeze out lines on the outside of the copper tube, affecting the service life of the copper tube. Summary of the Invention

[0004] The present invention is to solve the above problems and proposes a forming die for processing internal threaded copper tubes, which is convenient for cleaning internal copper mud.

[0005] The technical solution of the present invention is achieved as follows:

[0006] A forming die for processing an internally threaded copper tube and facilitating cleaning of internal copper mud comprises a rotary sleeve having a spinning cavity and a connecting sleeve having a spinning cavity, wherein the connecting sleeve and the rotary sleeve are connected together by a plurality of bolts, a first spinning ring is provided in the connecting sleeve and contacts with the inner circle thereof, a second spinning ring is provided in the rotating sleeve and contacts with the inner circle thereof, a plurality of steel balls are arranged in an annular array between the first spinning ring and the second spinning ring, a retaining ring is formed on the inner wall of the connecting sleeve, a first spring is provided between the retaining ring and the first spinning ring, and a second spring is provided on the side of the second spinning ring away from the steel balls. There is a gap between the first spinning ring and the second spinning ring, and a plurality of oil drain grooves are formed on the outer wall of the rotating sleeve, and the oil drain grooves correspond to the positions of the gaps. A shaft sleeve is fixed to the end of the rotating sleeve away from the connecting sleeve, and a lubrication device is fixed to the outside of the shaft sleeve through a support bearing. The lubrication device includes a protective cover covering the outside of the rotating sleeve, and a ring is formed at one end of the protective cover to be installed in cooperation with the steel ball. A flange is formed on the outer end of the ring to be sleeved on the outside of the copper tube, and a plurality of clamping holes are formed on the flange, and at least one oil spray pipe clamped in the clamping hole is installed on the flange.

[0007] Furthermore, a plurality of threaded holes are formed on the connecting sleeve, a through hole matching the threaded holes is formed on the rotating sleeve, and the oil drain groove and the through hole are staggered.

[0008] Furthermore, a combiner box is integrally formed at the lower end of the protective cover, and a discharge pipe is formed at one end of the combiner box.

[0009] Furthermore, a distribution box is integrally formed at the upper end of the protective cover, and an air intake pipe is formed at one end of the distribution box. The inner cavity of the distribution box is connected to the inner cavity of the protective cover through several groups of diversion holes. Each group of diversion holes has two and is arranged in an "eight" shape, and the outlet of the diversion hole is arranged toward the inner wall of the upper end of the protective cover.

[0010] Furthermore, a guide plate is fixed at a position on the top of the protective cover corresponding to the outlet of the diversion hole.

[0011] Furthermore, a splash-proof ring is fixed to a side of the protective cover close to the connecting sleeve through a detachable connection.

[0012] Furthermore, a plurality of fixing pin holes are formed on a side of the protective cover close to the connecting sleeve, and a pin column that cooperates with the fixing pin holes is formed on a side of the anti-splash ring facing the protective cover.

[0013] Furthermore, the splash shield ring is composed of two semicircular rings.

[0014] By adopting the above technical solution, the beneficial effects of the present invention are as follows: when processing the internal thread of a copper tube, lubricating oil is sprayed to the contact point between the steel ball and the copper tube through the oil spray pipe, which can not only cool the copper tube to avoid affecting the physical properties of the copper tube, but also lubricate it, reduce the friction between the steel ball and the copper tube, reduce the wear on the copper tube, and reduce the generation of copper powder. At the same time, under the action of centrifugal force, the lubricating oil and copper powder are mixed together and can be quickly discharged through the oil drain groove on the rotary sleeve to reach the protective cover, which is convenient for recovering the lubricating oil and copper mud, and at the same time avoids the splashing of lubricating oil to dirty the working environment; the first spring and the second spring are used to realize the automatic adjustment of the position of the first spinning ring and the second spinning ring to avoid loosening of the steel ball. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 is an exploded view of the present invention;

[0017] Figure 2 is a first stereogram of the present invention;

[0018] Figure 3 is a second perspective view of the present invention;

[0019] Figure 4 It is a front view of the present invention;

[0020] Figure 5 is a cross-sectional view of the present invention;

[0021] Figure 6 is a cross-sectional view of the protective cover of the present invention;

[0022] Figure 7 is a three-dimensional diagram of a first spinning ring of the present invention;

[0023] Figure 8 is a perspective view of a second spinning ring of the present invention;

[0024] Figure 9 It is a three-dimensional view of the splash guard ring of the present invention.

[0025] The following are the descriptions of the reference numerals:

[0026] 1. Connecting sleeve; 11. Threaded hole; 12. Retaining ring; 2. Rotating sleeve; 21. Through hole; 22. Oil drain groove; 23. Bushing; 24. Support bearing; 3. First spinning ring; 4. Second spinning ring; 5. First spring; 6. Second spring; 7. Lubrication device; 701. Protective cover; 702. Sleeve ring; 703. Flange; 704. Clamping hole; 705. Oil injection pipe; 706. Splash shield ring; 7061. Pin; 707. Fixing pin hole; 708. Distribution box; 709. Diverter hole; 710. Inlet pipe; 711. Guide plate; 712. Junction box; 713. Discharge pipe; 8. Steel ball; 9. Clearance. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] like Figures 1-9As shown, a forming die for processing an internal threaded copper tube is convenient for cleaning the internal copper mud, comprising a rotary sleeve 2 with a spinning cavity, a connecting sleeve 1 with a spinning cavity, the connecting sleeve 1 and the rotary sleeve 2 are connected together by a plurality of bolts, a first spinning ring 3 is provided in the connecting sleeve 1 to contact with its inner circle, a sealing ring is fixed on the outer circle of the first spinning ring 3 in contact with the connecting sleeve 1, a second spinning ring 4 is provided in the rotary sleeve 2 to contact with its inner circle, a sealing ring is fixed on the outer circle of the second spinning ring 4 in contact with the rotary sleeve 2, a plurality of steel balls 8 are arranged in an annular array between the first spinning ring 3 and the second spinning ring 4, and the steel balls 8 are connected to the first spinning ring 3 and the second spinning ring 3. The spinning rings 4 are in conflict with each other, and a retaining ring 12 is formed on the inner wall of the connecting sleeve 1. A first spring 5 is provided between the retaining ring 12 and the first spinning ring 3. A second spring 6 is provided on the side of the second spinning ring 4 away from the steel ball 8. The first spring 5 and the second spring 6 can automatically push the first spinning ring 3 and the second spinning ring 4 to clamp the steel ball 8. A limiting ring for limiting the position of the first spring 5 is formed at one end of the first spinning ring 3, and a limiting ring for limiting the position of the second spring 6 is formed at one end of the second spinning ring 4. There is a gap 9 between the first spinning ring 3 and the second spinning ring 4, and the width of the gap 9 is not less than 1 mm. Four The oil drain groove 22 corresponds to the position of the gap 9. The copper powder generated by the friction between the steel ball 8 and the copper tube can be discharged from the rotary sleeve 2 through the gap 9 and the oil drain groove 22. Four threaded holes 11 are formed on the connecting sleeve 1, and a through hole 21 matching the threaded hole 11 is formed on the rotary sleeve 2. The oil drain groove 22 is staggered with the through hole 21. A shaft sleeve 23 is fixed to the end of the rotary sleeve 2 away from the connecting sleeve 1. A lubricating device 7 is fixed to the outside of the shaft sleeve 23 through a support bearing 24. When the rotary sleeve 2 rotates, the lubricating device 7 will not rotate relatively. The lubricating device 7 includes a protective cover 701 covering the outside of the rotary sleeve 2 to prevent Lubricating oil and copper mud splash, and a ring 702 is formed at one end of the protective cover 701 to be installed in conjunction with the steel ball 8. A flange 703 is formed on the outer end of the ring 702 to be sleeved on the outside of the copper tube. A plurality of clamping holes 704 are formed on the flange 703. At least one oil injection pipe 705 is installed on the flange 703 and is clamped in the clamping holes 704. The oil supply system connected to the oil injection pipe 705 can spray lubricating oil to the contact point between the steel ball 8 and the copper tube, thereby reducing the temperature of the copper tube and realizing room temperature processing of the copper tube. At the same time, the lubricating oil can play a lubricating role and take away the copper powder generated by friction, thereby reducing friction and reducing the depth of the dents on the surface of the copper tube.

[0029] In this embodiment, a junction box 712 for collecting lubricating oil and copper mud is integrally formed at the lower end of the protective cover 701, and a discharge pipe 713 is formed at one end of the junction box 712. The lubricating oil and copper mud splash out from the rotating sleeve 2 under the action of centrifugal force and reach the inner wall of the protective cover 701, and flow into the junction box 712 along the inner wall of the protective cover 701, so as to facilitate the collection of the lubricating oil and copper mud.

[0030] In this embodiment, a distribution box 708 is integrally formed at the upper end of the protective cover 701, and an air intake pipe 710 is formed at one end of the distribution box 708. The inner cavity of the distribution box 708 is connected to the inner cavity of the protective cover 701 through several groups of diversion holes 709. Each group of diversion holes 709 is two and arranged in an "eight" shape. The outlet of the diversion hole 709 is arranged toward the inner wall of the upper end of the protective cover 701. A guide plate 711 is fixed at the position corresponding to the outlet of the diversion hole 709 at the top of the protective cover 701. The air supply system is connected to the air intake pipe 710, and the guide plate 711 is used to spray the air flow onto the inner wall of the upper end of the protective cover 701 to blow the lubricating oil adhered to the inner wall of the protective cover 701 to accelerate the sliding, thereby avoiding the adhesion and dripping of the lubricating oil affecting the collection of the lubricating oil and copper mud, and at the same time reducing the probability of the copper mud dripping onto the rotary sleeve 2.

[0031] In this embodiment, a splash-proof ring 706 is fixed to the side of the protective cover 701 close to the connecting sleeve 1 through a detachable connection. A plurality of fixing pin holes 707 are formed on the side of the protective cover 701 close to the connecting sleeve 1. A pin 7061 is formed on the side of the splash-proof ring 706 facing the protective cover 701 and is installed in conjunction with the fixing pin hole 707. The splash-proof ring 706 consists of two semicircular rings. The two semicircular splash-proof rings 706 can be quickly installed on the side wall of the protective cover 701 by utilizing the cooperation of the pin 7061 and the fixing pin hole 707 to reduce the splashing of lubricating oil. At the same time, this structural design facilitates the installation and disassembly of the splash-proof ring 706.

[0032] The working principle of the present invention is:

[0033] During use, the connecting sleeve 1 is fixed on the rotating shaft, and the copper tube passes through the middle of several steel balls 8. In the process of using the traction mechanism to pull the steel tube to move, lubricating oil is sprayed to the contact point between the steel balls 8 and the copper tube through the oil spray pipe 705 for lubrication. In the process of the connecting sleeve 1 being driven by the rotating shaft, the steel balls 8 and the copper tube rotate relative to each other to generate friction. The copper mud generated by the friction passes through the gap 9 and the oil drain groove 22 under the action of centrifugal force and splashes onto the inner wall of the protective cover 701. Under the action of gravity, the lubricating oil containing copper mud flows along the inner wall of the protective cover 701 to the junction box 712, and then the lubricating oil containing copper mud is sucked away by the suction device installed on the discharge pipe 713. By installing an air source on the air inlet pipe 710, air can be blown onto the inner wall of the protective cover 701, and the wind force is used to accelerate the flow speed of the lubricating oil, thereby accelerating the recovery speed and effect of the lubricating oil.

[0034] Components not described in detail herein are prior art.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A forming die for processing an internally threaded copper tube and facilitating cleaning of internal copper mud, comprising a rotary sleeve (2) having a spinning cavity and a connecting sleeve (1) having a spinning cavity, wherein the connecting sleeve (1) and the rotary sleeve (2) are connected together by a plurality of bolts, a first spinning ring (3) is provided in the connecting sleeve (1) and contacts with the inner circle thereof, a second spinning ring (4) is provided in the rotating sleeve (2) and contacts with the inner circle thereof, a plurality of steel balls (8) are arranged in an annular array between the first spinning ring (3) and the second spinning ring (4), and the invention is characterized in that: A retaining ring (12) is formed on the inner wall of the connecting sleeve (1), a first spring (5) is provided between the retaining ring (12) and the first spinning ring (3), a second spring (6) is provided on the side of the second spinning ring (4) away from the steel ball (8), a gap (9) exists between the first spinning ring (3) and the second spinning ring (4), a plurality of oil drain grooves (22) are formed on the outer wall of the rotating sleeve (2), the oil drain grooves (22) correspond to the positions of the gaps (9), a shaft sleeve (23) is fixed on the end of the rotating sleeve (2) away from the connecting sleeve (1), A lubricating device (7) is fixed to the outside of the shaft sleeve (23) via a supporting bearing (24), and the lubricating device (7) includes a protective cover (701) covering the outside of the rotating sleeve (2), one end of the protective cover (701) is formed with a collar (702) for mounting in conjunction with the steel ball (8), the outer end of the collar (702) is formed with a flange (703) sleeved on the outside of the copper tube, the flange (703) is formed with a plurality of clamping holes (704), and the flange (703) is installed with at least one oil injection pipe (705) clamped in the clamping hole (704).

2. A forming die for processing an internally threaded copper tube that is convenient for cleaning the internal copper mud according to claim 1, characterized in that: The connecting sleeve (1) is formed with a plurality of threaded holes (11), the rotating sleeve (2) is formed with through holes (21) matching the threaded holes (11), and the oil drain groove (22) is staggered with the through holes (21).

3. The forming die for processing an internally threaded copper tube and facilitating cleaning of internal copper mud according to claim 1, characterized in that: A combiner box (712) is integrally formed at the lower end of the protective cover (701), and a discharge pipe (713) is formed at one end of the combiner box (712).

4. The forming die for processing an internally threaded copper tube and facilitating cleaning of internal copper mud according to claim 1, characterized in that: A distribution box (708) is integrally formed at the upper end of the protective cover (701), and an air inlet pipe (710) is formed at one end of the distribution box (708). The inner cavity of the distribution box (708) is connected to the inner cavity of the protective cover (701) through a plurality of groups of diversion holes (709). Each group of diversion holes (709) is two and arranged in an "eight" shape. The outlets of the diversion holes (709) are arranged toward the inner wall of the upper end of the protective cover (701).

5. The forming die for processing an internally threaded copper tube and facilitating cleaning of internal copper mud according to claim 4, characterized in that: A guide plate (711) is fixed at a position on the top of the protective cover (701) corresponding to the outlet of the diversion hole (709).

6. The forming die for processing an internally threaded copper tube and facilitating cleaning of internal copper mud according to claim 1, characterized in that: A splash-proof ring (706) is fixed to one side of the protective cover (701) close to the connecting sleeve (1) via a detachable connection.

7. A forming die for processing an internally threaded copper tube and facilitating cleaning of internal copper mud according to claim 6, characterized in that: A plurality of fixing pin holes (707) are formed on a side of the protective cover (701) close to the connecting sleeve (1), and a pin column (7061) is formed on a side of the anti-splash ring (706) facing the protective cover (701) and is mounted in cooperation with the fixing pin holes (707).

8. The forming die for processing an internally threaded copper tube and facilitating cleaning of internal copper mud according to claim 7, characterized in that: The splash shield ring (706) consists of two semicircular rings.

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