CN209866997U - Aluminum pipe thread extrusion die - Google Patents

Abstract

The utility model discloses an aluminum pipe thread extrusion die, which comprises an internal tooth core head and a rotary mandrel, wherein one end of the rotary mandrel is connected with a bevel gear, one end of the rotary mandrel, which is far away from the bevel gear, is provided with a mounting groove, the inner wall of the mounting groove is provided with a plurality of chutes communicated with the outer wall of the rotary mandrel, the chutes are evenly distributed around the axis circumference of the mounting groove, the chutes are internally inserted with limit rods, the limit rods are in sliding fit with the chutes, two opposite ends of the limit rods are respectively provided with a first extrusion inclined plane, the mounting groove is internally provided with a linkage disk, the outer wall of the linkage disk is in sliding fit with the inner wall of the mounting groove, the linkage disk is provided with a plurality of extrusion grooves corresponding to the limit rods one by one towards the side surface of the limit rods, the extrusion grooves are provided with a second extrusion inclined plane, and the connecting disc is provided with a limiting device. The utility model discloses can realize that internal tooth core is first and rotate easy dismounting between the dabber.

Description

Aluminum pipe thread extrusion die

Technical Field

The utility model relates to an extrusion tooling technical field specifically is an aluminum pipe thread extrusion tooling.

Background

With the progress and development of air-conditioning refrigeration technology, technologies such as replacing copper with aluminum and increasing internal teeth threads in pipes to improve heat exchange performance have been greatly developed as the industry direction of preferential development in the industry. As is well known, the aluminum price is less than 30% of the copper price at present, and the aluminum quality is only 30% of the copper, so that the aluminum has a strong economic value instead of the copper at present when energy conservation and emission reduction are advocated. Because of the potential difference between copper and aluminum metals, the electrochemical corrosion increases the thermal resistance between the copper pipe and the aluminum fin after long-time use, the heat exchange efficiency is reduced, and the energy efficiency ratio is reduced. The pipeline system with the all-aluminum structure avoids the inherent defect, reduces welding among different kinds of metal, and is beneficial to improving the reliability of the refrigeration system in long-term use.

Compared with the common aluminum pipe, the internal thread pipe can effectively improve the surface area in the pipe by 2 to 3 times, and the formed turbulent flow effect improves the heat conduction efficiency by 1.3 to 1.5 times. It is understood that the diameter of the high-efficiency energy-saving internal thread copper pipe in the current copper pipe industry is generally below 9.52mm, the bottom wall thickness is below 0.25mm, and the tooth crest angle is between 20 and 40 degrees. The diameter of the new generation of thin and high tooth internal thread copper pipe is generally below 7mm, the tooth height is 0.20-0.24 mm, and the tooth crest angle is between 10-20 degrees, compared with the common internal thread copper pipe, the product saves more than 5 percent of material, and the heat exchange area of the inner surface of the copper pipe is increased by more than 14.4 percent.

At present, in the conventional tube-making process, the most basic method of forming the internal thread is to produce the internal thread in the direction of the thread placed on the core rod in the tube while increasing the wall thickness by reducing the drawing. One of the methods is a stretch forming method which requires a great stretching force, generates heat and tube breakage due to the increase of the stretching force and a thread forming force, and also causes the generation of cracks, and thus, the process is not suitable for the processing of deep internal threads when producing thick-walled tubes. The second method is a cold rolling forming method: the method is characterized in that the tube is partially contacted with a roller, so that the tensile load is reduced, the heat generated in the processing process is less, deeper internal threads can be formed, and a thick-wall tube can be produced; however, the disadvantages are that the feeding speed of the tube is low, the adjustment of the rolls requires a long time and advanced technology, and the accuracy of the finished tube is not good because the support shafts of the rolls determine the rigidity of the die.

Patent publication No. CN103028625A discloses an apparatus for manufacturing an internally toothed threaded aluminum pipe and a method thereof, comprising: the aluminum pipe extruding device comprises an extruding device and a die, wherein the extruding device applies acting force on aluminum materials, the die is matched with the extruding device, the die and the extruding device form an aluminum material channel which is communicated with each other, the aluminum materials form an aluminum pipe after passing through the aluminum material channel, an internal tooth core print fixed in the die is arranged in the aluminum material channel, and the internal tooth core print forms corresponding internal tooth threads on the inner wall of the extruded aluminum pipe. Through the adoption area rotatory internal tooth core head's aluminium extrusion die, for internal tooth core head provides corresponding rotary power's auxiliary fixtures and driving motor to and provide control signal's aluminum pipe speed sensor for driving motor, can produce more aluminum alloy trade marks of processing, product specification and size more than the wide range, more complicated internal tooth height and shape, more accurate internal tooth helix angle.

On the rotatory dabber of internal tooth core head fixed connection, because internal tooth core head live time long takes place wearing and tearing and need change, but current fixed mode internal tooth core head is inconvenient from changeing epaxial dismantlement of dabber, influences the change efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem lie in overcoming prior art's internal tooth core head and dismantling inconvenient defect from changeing the dabber, provide an aluminum pipe thread extrusion tooling. The aluminum pipe thread extrusion die has the advantages that the internal tooth core head can be conveniently detached from the rotary core shaft, and the like.

In order to achieve the above object, the utility model provides a following technical scheme: an aluminum pipe thread extrusion die comprises an internal tooth core head and a rotary mandrel, wherein one end of the rotary mandrel is connected with a bevel gear, one end of the rotary mandrel, which is far away from the bevel gear, is provided with a mounting groove, the inner wall of the mounting groove is provided with a plurality of sliding grooves which are communicated with the outer wall of the rotary mandrel, the sliding grooves are uniformly distributed around the circumference of the axis of the mounting groove, limiting rods are inserted in the sliding grooves, the limiting rods are in sliding fit with the sliding grooves, two opposite ends of each limiting rod are respectively provided with a first extrusion inclined plane, a linkage disk is arranged in the mounting groove, the outer wall of the linkage disk is in sliding fit with the inner wall of the mounting groove, the linkage disk is provided with a plurality of extrusion grooves which are in one-to-one correspondence with the limiting rods, the extrusion grooves are provided with second extrusion inclined planes which are in one-to-one correspondence, the limiting rods correspond to the limiting grooves one to one, the limiting grooves are connected with the limiting rods in an inserting mode, and limiting devices are arranged on the linkage disc.

Further, stop device includes spacing plug screw, spacing plug screw sets up the one side of keeping away from the gag lever post at the linkage dish, the outer wall of spacing plug screw and the inner wall threaded connection of mounting groove.

Furthermore, the side of spacing plug screw towards the linkage board is equipped with the spread groove, the bottom surface of spread groove is equipped with rotates the groove, spread groove and rotation groove coaxial line, it is equipped with the rotor plate to rotate the inslot, the rotor plate rotates with the rotation groove to be connected, be fixed with the connecting rod that extends the spread groove on the rotor plate, the one end and the linkage dish fixed connection of rotor plate are kept away from to the connecting rod.

Further, the number of the limiting rods is two.

Furthermore, a return spring is arranged between the two limiting rods, and two ends of the return spring are fixedly connected with two opposite side surfaces of the two limiting rods respectively.

Furthermore, a cross groove is formed in the side face, far away from the linkage plate, of the limiting screw plug.

Furthermore, one side of the limiting bolt, which is far away from the linkage plate, is provided with a positioning rod, and the positioning rod is connected with the inner wall of the mounting groove.

Further, the locating rod is in threaded connection with the inner wall of the mounting groove.

Compared with the prior art, the beneficial effects of the utility model are that: in the utility model, after the internal tooth core head is sleeved on the rotating mandrel, the limiting rod is aligned with the limiting groove, the limiting screw plug is gradually screwed in, at the moment, the two extrusion inclined planes on the linkage plate drive the limiting rod to move in the limiting groove through the first extrusion inclined plane of the extrusion limiting rod until the limiting rod is abutted against the bottom surface of the limiting groove, so that the internal tooth core head is fixed with the rotating mandrel, and at the moment, the return spring is in a stretching state; when the internal tooth core print needs to be dismantled, as long as the spacing plug screw of antiport, spacing plug screw will drive the linkage dish gradually and leave the gag lever post, and the gag lever post receives the resilience force of replying the spring and leaves the spacing groove this moment, and the internal tooth core print just can be taken off to worry about dying, changes new internal tooth core print.

Drawings

FIG. 1 is an exploded view of an internal tooth core print and a rotating core in an aluminum pipe thread extrusion die according to the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at I;

FIG. 3 is an enlarged view of a portion of FIG. 1 at II;

FIG. 4 is a cross-sectional view of an internal tooth core print and rotary spindle connection.

Reference numbers in the figures: 1. an internal tooth core print; 2. rotating the mandrel; 3. a bevel gear; 4. a cross groove; 5. a limiting screw plug; 6. a rotating plate; 7. a connecting rod; 8. a linkage disk; 9. extruding the inclined plane II; 10. extruding a groove; 11. mounting grooves; 12. a limiting rod; 13. a return spring; 14. a chute; 15. positioning a rod; 16. extruding the first inclined plane; 17. an external thread; 18. connecting threads; 19. a rotating groove; 20. and connecting the grooves.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: an aluminum pipe thread extrusion die comprises an internal tooth core head 1 and a rotary mandrel 2, one end of the rotary mandrel 2 is connected with a bevel gear 3, one end of the rotary mandrel 2, far away from the bevel gear 3, is provided with a mounting groove 11, the inner wall of the mounting groove 11 is provided with a plurality of sliding grooves 14 communicated with the outer wall of the rotary mandrel 2, the sliding grooves 14 are uniformly distributed around the axis circumference of the mounting groove 11, a limiting rod 12 is inserted in the sliding groove 14, the limiting rod 12 is in sliding fit with the sliding grooves 14, two opposite ends of the limiting rod 12 are respectively provided with a first extrusion inclined plane 16, a linkage disk 8 is arranged in the mounting groove 11, the outer wall of the linkage disk 8 is in sliding fit with the inner wall of the mounting groove 11, the side surface of the linkage disk 8, facing the limiting rod 12, is provided with a plurality of extrusion grooves 10 one-to one corresponding to the limiting rod 12, the, the inner wall of the internal tooth core print 1 is provided with a plurality of limiting grooves, limiting rods 12 correspond to the limiting grooves one to one, the limiting grooves are connected with the limiting rods 12 in an inserting mode, limiting devices are arranged on the linkage disk 8, and the limiting devices can limit the position of the linkage disk 8.

Further, stop device includes spacing plug screw 5, is equipped with external screw thread 17 on the outer wall of spacing plug screw 5, and spacing plug screw 5 sets up the one side of keeping away from gag lever post 12 at linkage disk 8, and spacing plug screw 5's external screw thread 17 twists in to mounting groove 11 through spacing plug screw 5 with the inner wall threaded connection of mounting groove 11, drives linkage disk 8 in to mounting groove 11.

Furthermore, the side face, facing the linkage plate, of the limiting screw plug 5 is provided with a connecting groove 20, the bottom face of the connecting groove 20 is provided with a rotating groove 19, the connecting groove 20 is coaxial with the rotating groove 19, a rotating plate 6 is arranged in the rotating groove 19, the rotating plate 6 is rotatably connected with the rotating groove 19, a connecting rod 7 extending out of the connecting groove 20 is fixed on the rotating plate 6, one end, far away from the rotating plate 6, of the connecting rod 7 is fixedly connected with the linkage disc 8, and relative rotation of the rotating disc and the limiting screw plug 5 is achieved.

Furthermore, the number of the limiting rods 12 is two, a return spring 13 is arranged between the two limiting rods 12, and two ends of the return spring 13 are respectively fixedly connected with two opposite side surfaces of the two limiting rods 12.

Furthermore, a cross groove 4 is formed in the side face, away from the linkage plate, of the limiting screw plug 5, so that a cross screwdriver can rotate conveniently.

Furthermore, one side of the limit bolt, which is far away from the linkage plate, is provided with a positioning rod 15, the positioning rod 15 is connected with the inner wall of the mounting groove 11, the outer wall of the positioning rod 15 is provided with a connecting thread 18, the connecting thread 18 of the positioning rod 15 is in threaded connection with the inner wall of the mounting groove 11, and when the limit screw plug 5 rotates to abut against the positioning rod 15, the limiting rod 12 completely leaves the limiting groove, so that the number of turns of the worker can be reduced, and the working efficiency is increased.

The working principle is as follows: in the utility model, after the internal tooth core head 1 is sleeved on the rotating mandrel 2, the limiting rod 12 is aligned with the limiting groove, the limiting screw plug 5 is gradually screwed in, and the second extrusion inclined plane 9 on the linkage plate drives the limiting rod 12 to move in the limiting groove through the first extrusion inclined plane 16 of the extrusion limiting rod 12 until the limiting rod 12 is abutted against the bottom surface of the limiting groove, so that the internal tooth core head 1 is fixed with the rotating mandrel 2, and the return spring 13 is in a stretching state; when the internal tooth core print 1 needs to be disassembled, as long as the reverse rotation limiting screw plug 5 is used, the limiting screw plug 5 can drive the linkage disc 8 to gradually leave the limiting rod 12, at the moment, the limiting rod 12 is separated from the limiting groove by resilience force of the return spring 13, the internal tooth core print 1 can be taken down, and a new internal tooth core print 1 is replaced.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. The utility model provides an aluminum pipe screw thread extrusion tooling, includes internal tooth core print (1) and rotatory dabber (2), the one end of rotatory dabber (2) is connected with bevel gear (3), its characterized in that: one end of the rotating mandrel (2) far away from the bevel gear (3) is provided with a mounting groove (11), the inner wall of the mounting groove (11) is provided with a plurality of sliding grooves (14) communicated with the outer wall of the rotating mandrel (2), the sliding grooves (14) are uniformly distributed around the circumference of the axis of the mounting groove (11), limiting rods (12) are inserted in the sliding grooves (14), the limiting rods (12) are in sliding fit with the sliding grooves (14), two opposite ends of each limiting rod (12) are provided with a first extrusion inclined plane (16), a linkage disk (8) is arranged in the mounting groove (11), the outer wall of the linkage disk (8) is in sliding fit with the inner wall of the mounting groove (11), the side surface of the linkage disk (8) facing the limiting rods (12) is provided with a plurality of extrusion grooves (10) corresponding to the limiting rods (12), and the extrusion grooves (10) are provided with second extrusion inclined planes (9) corresponding to the first extrusion inclined planes (, extrusion inclined plane two (9) and the laminating of extrusion inclined plane one (16), the inner wall of internal tooth core print (1) is equipped with a plurality of spacing grooves, gag lever post (12) and spacing groove one-to-one, the spacing groove is pegged graft with gag lever post (12), be equipped with stop device on linkage disk (8).

2. An aluminum pipe threading extrusion die as recited in claim 1, wherein: the limiting device comprises a limiting plug screw (5), external threads (17) are arranged on the outer wall of the limiting plug screw (5), the limiting plug screw (5) is arranged on one side, away from the limiting rod (12), of the linkage disc (8), and the external threads (17) of the limiting plug screw (5) are connected with the inner wall threads of the mounting groove (11).

3. An aluminum pipe threading extrusion die as recited in claim 2, wherein: spacing plug screw (5) are equipped with spread groove (20) towards the side of linkage board, the bottom surface of spread groove (20) is equipped with rotates groove (19), spread groove (20) and rotation groove (19) coaxial line, be equipped with rotor plate (6) in rotation groove (19), rotor plate (6) rotate with rotation groove (19) and are connected, be fixed with connecting rod (7) that extend spread groove (20) on rotor plate (6), the one end and linkage disk (8) fixed connection of rotor plate (6) are kept away from in connecting rod (7).

4. An aluminum pipe threading extrusion die as recited in claim 1, wherein: the number of the limiting rods (12) is two.

5. An aluminum pipe threading extrusion die as recited in claim 1, wherein: two be equipped with between gag lever post (12) answer spring (13), answer spring (13)'s both ends respectively with two relative side fixed connection of two gag lever posts (12).

6. An aluminum pipe threading extrusion die as recited in claim 2, wherein: and a cross groove (4) is formed in the side surface, far away from the linkage plate, of the limiting screw plug (5).

7. An aluminum pipe threading extrusion die as recited in claim 6, wherein: one side of the limiting bolt, which is far away from the linkage plate, is provided with a positioning rod (15), and the positioning rod (15) is connected with the inner wall of the mounting groove (11).

8. An aluminum pipe threading extrusion die as recited in claim 7, wherein: the outer wall of the positioning rod (15) is provided with a connecting thread (18), and the connecting thread (18) of the positioning rod (15) is in threaded connection with the inner wall of the mounting groove (11).