Production equipment and process of capillary aluminum alloy pipe

Abstract

The invention discloses production equipment and process for a capillary aluminum alloy pipe, and belongs to the technical field of aluminum alloy pipe machining. The equipment comprises a workbench, a stretching mechanism is arranged on one side of a pressing mechanism, and a spraying mechanism is arranged above the workbench; the stretching mechanism comprises two sets of pressing plates which are oppositely arranged, driving assemblies are arranged on the two sides of the two sets of pressing plates, a plurality of containing grooves are formed in the inner sides of the pressing plates, extrusion pieces are arranged in the containing grooves, and a plurality of sets of extrusion pieces are arranged in each containing groove; the extrusion part comprises two oppositely-arranged arc-shaped plates, one ends of the inner sides of the two arc-shaped plates are rotationally connected, hinge seats are arranged on the outer sides of the arc-shaped plates, and hydraulic rods are rotationally connected to the hinge seats. By arranging the two rotationally-connected arc-shaped plates, the distance between the two arc-shaped plates is conveniently adjusted, and therefore the purpose of indirectly adjusting the inner diameter of the containing groove is achieved; adjustment can be conveniently carried out along with the diameter change of the aluminum alloy tube blank in the stretching process, so that the purpose of reducing stretching die replacement is achieved, and the machining efficiency of the aluminum alloy capillary tube is improved.

Description

Technical Field

[0001] This invention relates to the field of aluminum alloy tube processing technology, and more specifically, to a production equipment and process for capillary aluminum alloy tubes. Background Technology

[0002] In air conditioning and refrigeration systems, capillary tubes are expansion devices (or throttling devices), an indispensable basic component of the refrigeration cycle. Currently, in refrigeration systems, capillary tubes are generally made of copper and connect the condenser and evaporator. The capillary tube generates a pressure drop along its length due to its flow resistance, controlling the refrigerant flow and maintaining the pressure difference between the condenser and evaporator. Because copper is inherently expensive, and the manufacturing process of capillary tubes is complex, the processing cost of copper capillary tubes is also very high. Therefore, the use of pure aluminum capillary tubes as heat exchange tubing to replace pure copper capillary tubes has gained attention. Aluminum, compared to copper, has advantages such as higher heat transfer performance, lower price, lower density, and abundant resources. The all-aluminum refrigeration system for refrigerators and freezers emerged against this backdrop.

[0003] When aluminum is processed into capillary tubes, it is necessary to constantly change the mold for stretching, which results in low production efficiency. In view of this, we propose a production equipment and process for capillary aluminum alloy tubes. Summary of the Invention

[0004] The purpose of this invention is to provide a production equipment and process for capillary aluminum alloy tubes to solve the problems mentioned in the background art.

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

[0006] A production equipment for capillary aluminum alloy tubes includes a workbench, a pressing mechanism on one side of the workbench, a stretching mechanism on one side of the pressing mechanism, and a spraying mechanism above the workbench.

[0007] The stretching mechanism includes two sets of pressure plates arranged opposite each other. Both sets of pressure plates are equipped with drive components on both sides. Multiple receiving slots are opened on the inner side of the pressure plates. Extrusion components are installed in the receiving slots, and multiple sets of extrusion components are installed in each receiving slot.

[0008] The extrusion component includes two opposing arc-shaped plates, which are rotatably connected at one end of their inner sides. A winch is provided on the outer side of the arc-shaped plates, and a hydraulic rod is rotatably connected to the winch. The hydraulic rod is inclined.

[0009] Preferably, the drive assembly includes a fixed frame with a fixed rail on its inner side, two movable blocks on the inner side of the fixed rail, a slide rail on the fixed rail, and a slide bar on the movable block, with the slide bar slidingly engaging with the slide rail.

[0010] A push block is arranged between the two moving blocks, and the two ends of the push block are in sliding fit with the two moving blocks respectively.

[0011] One end of the outer side of the push block is provided with a cylinder, and the output shaft of the cylinder is connected with the push block.

[0012] Preferably, the inner side of the moving block is provided with an inclined surface A, the distance between the two inclined surfaces A close to the side of the extrusion piece gradually decreases, and the two side surfaces of the push block are provided with inclined surfaces B, and the inclined surface A is in sliding fit with the inclined surface B.

[0013] Preferably, a sliding groove is formed in the inclined surface A, and a sliding block is arranged on the inclined surface B in sliding fit with the sliding groove.

[0014] Preferably, the outer side of the pressing plate is provided with a mounting plate, and the mounting plate is connected with the moving block through bolts.

[0015] Preferably, the spraying mechanism comprises a connecting pipe and a supporting plate, a plurality of spray heads are arranged at the bottom of the connecting pipe, rolling shafts are arranged at the two ends of the connecting pipe, a limiting groove is arranged at the bottom surface of the supporting plate, and the rolling shafts are in sliding fit with the limiting groove.

[0016] A through groove is arranged between the two limiting grooves, an oil tank is arranged on one side of the corrugated pipe workbench, and the corrugated pipe is connected with the oil tank.

[0017] Preferably, the stretching mechanism is mounted on the top surface of the moving seat, a lead screw is arranged on the workbench, a motor is arranged at one end of the lead screw, the bottom of the moving seat is threadedly connected with the lead screw, and the moving seat is in sliding fit with the workbench.

[0018] Preferably, a production process of a capillary aluminum alloy pipe is applied to the production equipment of the capillary aluminum alloy pipe, and comprises the following steps:

[0019] An aluminum alloy pipe blank is prepared, and lubricating oil is injected into the aluminum alloy pipe blank;

[0020] One end of the aluminum alloy pipe blank is fixed in the pressing mechanism, the other end of the aluminum alloy pipe blank is fixed in the accommodating groove of the stretching mechanism, and the stretching mechanism is moved to stretch the aluminum alloy pipe blank, and the outer surface of the aluminum alloy pipe blank is continuously sprayed with external lubricating oil during the stretching process.

[0021] After the aluminum alloy pipe blank is stretched once, the piston rod of the hydraulic rod is elongated to push the two arc-shaped plates close to each other, and the distance between the two arc-shaped plates is adjusted.

[0022] After being stretched to a preset size, the aluminum alloy pipe blank is head-cut, and the aluminum alloy capillary pipe can be obtained after being taken off from the stretching machine.

[0023] Compared with the prior art, the beneficial effects of the present application are as follows:

[0024] (1) The present application is provided with two rotationally connected arc-shaped plates, which can adjust the distance between the two arc-shaped plates, thereby indirectly adjusting the inner diameter of the accommodating groove, and can adjust the diameter of the aluminum alloy pipe blank during the stretching process, thereby reducing the replacement of the stretching die, improving the processing efficiency of the aluminum alloy capillary tube, and the recess is arranged in the inner wall of the pressing plate, the hydraulic rod is arranged in the recess, and the distance between the two arc-shaped plates is synchronously adjusted through the hydraulic rod, thereby facilitating the simultaneous control of multiple extrusion pieces.

[0025] (2) The present application is provided with a spraying mechanism for spraying lubricating oil on the surface of the aluminum alloy pipe blank, wherein the support plate is provided with a moving assembly, which can drive the connecting pipe and the nozzle to reciprocate along the extension direction of the through groove, thereby continuously spraying lubricating oil on the surface of the aluminum alloy pipe blank, achieving the purpose of lubrication and cooling, preventing the pipe blank from being too high in temperature during the stretching process, and preventing the pipe blank from cracking. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic diagram of the production equipment of the capillary aluminum alloy pipe of the present application;

[0027] Figure 2 It is a schematic diagram of the production equipment of the capillary aluminum alloy pipe of the present application;

[0028] Figure 3 It is a schematic diagram of the stretching mechanism of the present application;

[0029] Figure 4 It is a schematic diagram of the pressing plate structure of the present application;

[0030] Figure 5 It is a schematic diagram of the Figure 4 It is an enlarged schematic diagram of A in the present application;

[0031] Figure 6 It is a schematic diagram of the extrusion piece structure of the present application.

[0032] Explanation of reference numerals in the figure: 1, workbench; 2, pressing mechanism; 3, stretching mechanism; 301, pressing plate; 302, accommodating groove; 303, extrusion piece; 304, binding seat; 305, hydraulic rod; 306, fixed frame; 307, fixed rail; 308, moving block; 309, sliding rail; 310, sliding bar; 311, push block; 312, air cylinder; 313, sliding groove; 314, mounting plate; 4, spraying mechanism; 401, connecting pipe; 402, roller; 403, support plate; 404, limiting groove; 405, through groove; 5, moving seat; 6, oil tank. DETAILED DESCRIPTION

[0033] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application.

[0034] Embodiment:

[0035] Please refer to Figures 1-6 A production equipment of capillary aluminum alloy pipe, comprising a workbench 1, a pressing mechanism 2 is arranged on one side of the workbench 1, the pressing mechanism 2 is used for pressing one end of the aluminum alloy pipe blank, a stretching mechanism 3 is arranged on one side of the pressing mechanism 2, the other end of the aluminum alloy pipe blank passes through the stretching mechanism 3, the end is clamped in the stretching mechanism 3, the aluminum alloy pipe blank is lengthened by reciprocating movement of the stretching mechanism 3, a spraying mechanism 4 is arranged above the workbench 1, the spraying mechanism 4 is used for spraying lubricating oil on the surface of the aluminum alloy pipe blank.

[0036] The stretching mechanism 3 comprises two groups of pressing plates 301 arranged oppositely, drive assemblies are arranged on the two sides of the two groups of pressing plates 301, a plurality of containing grooves 302 are formed in the inner sides of the pressing plates 301, the containing grooves 302 are circular arc structures, extrusion pieces 303 are arranged in the containing grooves 302, a plurality of groups of extrusion pieces 303 are arranged in each containing groove 302, the extrusion pieces 303 are used for clamping the aluminum alloy pipe blank, so that the aluminum alloy pipe blank is lengthened.

[0037] The extrusion piece 303 comprises two oppositely arranged arc-shaped plates, one end of the inner sides of the two arc-shaped plates is rotationally connected, a swivel base 304 is arranged on the outer side of the arc-shaped plate, a hydraulic rod 305 is rotationally connected on the swivel base 304, the hydraulic rod 305 is obliquely arranged, a groove is formed in the inner wall of the pressing plate 301, and the hydraulic rod 305 is installed in the groove. When the aluminum alloy pipe blank is stretched to a certain length by the stretching mechanism 3, the aluminum alloy pipe blank becomes thin, and at this time, the hydraulic rod 305 is elongated to make the two arc-shaped plates close to each other, so as to reduce the distance between the two arc-shaped plates, and the stretching mechanism 3 is moved to Figure 1 The initial position shown, the aluminum alloy pipe blank is located between the two arc-shaped plates, the stretching mechanism 3 is moved to further thin and lengthen the aluminum alloy pipe blank, and the process is repeated to prepare the aluminum alloy capillary tube.

[0038] The pressing mechanism 2 comprises an extrusion table, a pressing die is arranged above the extrusion table, and the output shaft of the air cylinder is used to push the pressing die to fix one end of the aluminum alloy pipe blank.

[0039] In the application, the driving assembly comprises a fixing frame 306, an inner side of which is provided with a fixing rail 307, two moving blocks 308 are arranged on the inner side of the fixing rail 307, a sliding rail 309 is formed on the fixing rail 307, a sliding strip 310 is arranged on the moving block 308, and the sliding strip 310 is in sliding fit with the sliding rail 309; the fixing rail 307 extends in the vertical direction, the two moving blocks 308 can move relatively in the vertical direction, and the plurality of aluminum alloy pipe blanks are clamped and fixed between the two pressing plates 301, so that the aluminum alloy pipe blanks are conveniently stretched.

[0040] The two moving blocks 308 are provided with a push block 311, and the push block 311 is in sliding fit with the two moving blocks 308 at two ends, respectively; the push block 311 is used for driving the two moving blocks 308 to move relatively.

[0041] The outer side of one end of the push block 311 is provided with a pneumatic cylinder 312, the output shaft of the pneumatic cylinder 312 is connected with the push block 311, and the push block 311 is installed on the fixing frame 306. The fixing frame 306, the pneumatic cylinder 312 and the push block 311 are all provided with two, the output shafts of the two pneumatic cylinders 312 are simultaneously telescopic to drive the two push blocks 311 to move.

[0042] In the application, the inner side surface of the moving block 308 is provided as an inclined surface A, the distance between the two inclined surfaces A close to the extrusion piece 303 gradually decreases, the two side surfaces of the push block 311 are provided as inclined surfaces B, and the inclined surface A is in sliding fit with the inclined surface B. The two inclined surfaces A are oppositely arranged, and the inclined directions thereof are opposite, so that the push block 311 is conveniently moved to drive the two moving blocks 308 to move relatively.

[0043] The inclined surface A is provided with a sliding groove 313, and the inclined surface B is provided with a sliding block in sliding fit with the sliding groove 313. When the output shaft of the pneumatic cylinder 312 is telescopic to drive the push block 311 to move, the two moving blocks 308 can move relatively under the action of the inclined surface A and the inclined surface B, so that the two pressing plates 301 move relatively, and the clamping and loosening of the aluminum alloy pipe blanks are realized.

[0044] In the application, the outer side of the pressing plate 301 is provided with a mounting plate 314, and the mounting plate 314 is connected with the moving block 308 through bolts. Figure 3 As shown in the figure.

[0045] In the application, the spraying mechanism 4 comprises a connecting pipe 401 and a supporting plate 403, a plurality of nozzles are arranged on the bottom of the connecting pipe 401, rolling shafts 402 are arranged at two ends of the connecting pipe 401, a limiting groove 404 is arranged on the bottom surface of the supporting plate 403, and the rolling shafts 402 are in sliding fit with the limiting groove 404; the track of one end of the connecting pipe 401 is limited through the cooperation of the rolling shafts 402 and the limiting groove 404.

[0046] A through groove 405 is arranged between the two limiting grooves 404, a corrugated pipe is connected to the connecting pipe 401, and the corrugated pipe is arranged to facilitate the reciprocating movement of the connecting pipe 401. A telescopic pipe can also be used instead of the corrugated pipe. An oil tank 6 is arranged on one side of the workbench 1, the corrugated pipe is connected to the oil tank 6, a pipe body connected to the corrugated pipe is arranged on the connecting pipe 401, and the pipe body is in sliding fit with the through groove 405. A moving assembly is arranged in the support plate 403, which can drive the connecting pipe 401 and the spray head to reciprocate along the extension direction of the through groove 405, so as to realize the purpose of spraying lubricating oil on the surface of the aluminum alloy pipe blank, play a lubricating and cooling role, prevent the temperature of the pipe blank from being too high during stretching, and prevent cracks from appearing on the surface of the pipe blank.

[0047] In the present application, a moving seat 5 is also included, the stretching mechanism 3 is installed on the top surface of the moving seat 5, a lead screw is arranged on the workbench 1, one end of the lead screw is provided with a motor, the bottom of the moving seat 5 is threadedly connected to the lead screw, the moving seat 5 is in sliding fit with the workbench 1, one end of the lead screw is connected to the output shaft of the motor, the motor is used to drive the rotation of the lead screw, so as to drive the moving seat 5 threadedly connected to the lead screw to move along the length direction of the lead screw, drive the reciprocating movement of the moving seat 5, and thus drive the reciprocating movement of the stretching mechanism 3. The two ends of the moving seat 5 are in sliding fit with the side wall of the workbench 1.

[0048] In a possible embodiment, a plurality of groups of rolling balls are rotationally connected to the inner wall of the extrusion piece 303, and the rolling balls are arranged in a spiral shape in the inner wall of the arc-shaped plate. During the stretching of the aluminum alloy pipe blank, the rolling balls are in contact with the outer wall of the pipe blank, and the rolling balls rotate under the action of friction, so as to achieve the purpose of spinning the outer wall of the pipe blank, and facilitate the subsequent stretching of the pipe blank.

[0049] A production process of a capillary aluminum alloy pipe, which is applied to the production equipment of the capillary aluminum alloy pipe and includes the following steps:

[0050] Step one: preparing an aluminum alloy pipe blank, and injecting lubricating oil into the aluminum alloy pipe blank;

[0051] Step two: fixing one end of the aluminum alloy pipe blank in the pressing mechanism 2, fixing the other end of the aluminum alloy pipe blank in the accommodating groove 302 of the stretching mechanism 3, and moving the stretching mechanism 3 to stretch the aluminum alloy pipe blank, and continuously spraying lubricating oil on the outer surface of the aluminum alloy pipe blank during the stretching process, so as to play a lubricating and cooling role, prevent the temperature of the pipe blank from being too high during the stretching process, and prevent cracks from appearing on the surface of the pipe blank;

[0052] Step three: after the aluminum alloy pipe blank is stretched once or the diameter of the aluminum alloy pipe blank is less than the distance between the two arc-shaped plates, the piston rod of the hydraulic rod 305 is elongated to push the two arc-shaped plates to move close to each other, the distance between the two arc-shaped plates is adjusted, the diameter of the pipe blank is greater than the diameter of the arc formed by the two arc-shaped plates, so as to facilitate the clamping and stretching of the pipe blank, and the process is repeatedly performed until the aluminum alloy pipe blank is stretched to a preset pipe diameter.

[0053] Step four: after the aluminum alloy pipe blank is stretched to the preset size, the head is removed from the stretching machine, and the aluminum alloy capillary tube is obtained.

[0054] In step three, when the pipe blank is stretched to a certain length, the aluminum alloy pipe blank will become thin, and at this time the hydraulic rod 305 is elongated to move the two arc-shaped plates close to each other, thereby reducing the distance between the two arc-shaped plates, so that the diameter of the pipe blank is greater than the diameter of the arc formed by the two arc-shaped plates, and the stretching mechanism 3 is moved to the initial position shown in the drawing. Figure 1 The stretched aluminum alloy pipe blank is placed between the two arc-shaped plates, and the output shafts of the two cylinders 312 provide outward pulling force to the two push blocks 311 on both sides, under the action of the inclined surface A and the inclined surface B, the two moving blocks 308 can move close to each other, so that the two pressing plates 301 move close to each other and extrude, realizing the clamping of the aluminum alloy pipe blank, and the moving seat 5 drives the stretching mechanism 3 to move to stretch and thin the aluminum alloy pipe blank, so as to prepare the aluminum alloy capillary tube.

[0055] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An apparatus for the production of capillary aluminium alloy tubes, comprising a workbench (1), characterised in that: The workbench (1) is provided with a pressing mechanism (2) on one side, the pressing mechanism (2) is provided with a stretching mechanism (3) on one side, and the workbench (1) is provided with a spraying mechanism (4) above. The stretching mechanism (3) includes two groups of pressing plates (301) oppositely arranged, two groups of the pressing plates (301) are provided with driving assemblies on both sides, a plurality of accommodating grooves (302) are formed in the inner side of the pressing plate (301), and the accommodating grooves (302) are provided with extrusion pieces (303). The extrusion piece (303) includes two oppositely arranged arc-shaped plates, one end of the inner side of the two arc-shaped plates is rotatably connected, the outer side of the arc-shaped plate is provided with a winding seat (304), the winding seat (304) is rotatably connected with a hydraulic rod (305), and the hydraulic rod (305) is inclinedly arranged.

2. The apparatus for producing a capillary aluminum alloy pipe according to claim 1, wherein: The driving assembly includes a fixed frame (306), the inner side is provided with a fixed rail (307), the inner side of the fixed rail (307) is provided with two moving blocks (308), the fixed rail (307) is provided with a sliding rail (309), the moving block (308) is provided with a sliding bar (310), and the sliding bar (310) and the sliding rail (309) are in sliding fit. Two moving blocks (308) are provided with a push block (311), and the two ends of the push block (311) are respectively in sliding fit with the two moving blocks (308). One end of the outer side of the push block (311) is provided with a gas cylinder (312), the output shaft of the gas cylinder (312) is connected with the push block (311), and the push block (311) is installed on the fixed frame (306).

3. The apparatus for producing a capillary aluminum alloy pipe according to claim 2, wherein: The inner side surface of the moving block (308) is provided as an inclined surface A, the distance between the two inclined surfaces A close to the extrusion piece (303) side gradually decreases, the two side surfaces of the push block (311) are provided as inclined surfaces B, and the inclined surface A and the inclined surface B are in sliding fit.

4. The apparatus for producing a capillary aluminum alloy pipe according to claim 3, wherein: The inclined surface A is provided with a sliding groove (313), the inclined surface B is provided with a sliding block, and the sliding block and the sliding groove (313) are in sliding fit.

5. The apparatus for producing a capillary aluminum alloy pipe according to claim 2, wherein: The outer side of the pressing plate (301) is provided with a mounting plate (314), and the mounting plate (314) and the moving block (308) are connected through bolts.

6. The apparatus for producing a capillary aluminum alloy pipe according to claim 1, wherein: The spraying mechanism (4) includes a connecting pipe (401) and a supporting plate (403), the connecting pipe (401) is provided with a plurality of nozzles at the bottom, the connecting pipe (401) is provided with a roller (402) at both ends, the supporting plate (403) is provided with a limiting groove (404) at the bottom, and the roller (402) and the limiting groove (404) are in sliding fit. Two limiting grooves (404) are provided with a through groove (405), the connecting pipe (401) is connected with a corrugated pipe, and the workbench (1) is provided with an oil tank (6) on one side.

7. The apparatus for producing a capillary aluminum alloy pipe according to claim 1, wherein: It also includes a moving seat (5), the stretching mechanism (3) is installed on the top surface of the moving seat (5), a lead screw is arranged on the workbench (1), one end of the lead screw is provided with a motor, the bottom of the moving seat (5) is threadedly connected with the lead screw, and the moving seat (5) and the workbench (1) are in sliding fit.

8. A process for producing a capillary aluminium alloy tube, applied to the production apparatus of any one of claims 1 to 7, characterized in that: It comprises the following steps: Preparation of aluminum alloy tube blank, injection lubricating oil into the aluminum alloy tube blank; Put one end of the aluminum alloy tube blank into the pressing mechanism (2) and fix it, put the other end of the aluminum alloy tube blank through the accommodating groove (302) of the stretching mechanism (3) and fix it, and move the stretching mechanism (3) to stretch the aluminum alloy tube blank, and spray the outer lubricating oil to the outer surface of the aluminum alloy tube blank uninterruptedly during the stretching process; After the aluminum alloy tube blank is stretched for one time, the piston rod of the hydraulic rod (305) is elongated to push the two arc-shaped plates to approach each other, and the distance between the two arc-shaped plates is adjusted; After stretching to the preset size, the aluminum alloy tube blank is head-off, and the stretching machine is taken off, and the aluminum alloy capillary tube is obtained.

Images