CN211588276U - A radiator expansion tube and tube end processing equipment - Google Patents

Abstract

The utility model provides a radiator expansion pipe and pipe end processing device, which comprises a frame, a positioning device, a station switching device, an expansion pipe device and a pipe end device; the frame is provided with a workbench; the positioning device is arranged on the workbench; the station switching device comprises a first power assembly and a mounting plate; the tube expansion device comprises a second power assembly and a tube expansion head; the second power assembly is in transmission connection with the tube expansion head and drives the tube expansion head to be close to or far away from the tube orifice; the pipe end device comprises a third power assembly, a necking head and a flat head; the third power assembly is in transmission connection with the necking head and the flat head respectively to drive the necking head and the flat head to approach or separate from the pipe orifice; the first power assembly drives the mounting plate to reciprocate. Fix the radiator on the workstation through positioner, rethread station auto-change over device switches the expand tube device and pipe end device to the operation position according to the preface, carries out expand tube, throat and flat mouthful processing to the mouth of pipe of radiator, has greatly improved the degree of automation and the production efficiency of production operation.

Description

A radiator expansion tube and tube end processing equipment

technical field

The utility model relates to the field of radiator manufacturing, in particular to a radiator expansion pipe and pipe end processing equipment.

Background technique

A radiator, such as a finned radiator, is the most widely used heat exchange structure in gas and liquid exchangers. It achieves the purpose of enhancing heat transfer by adding fins to the pipe (U-shaped).

The manufacturing process of the radiator includes two processes: tube expansion and tube end processing. The existing processing method is that the expansion tube and the tube end are processed separately on different equipment, and the manual tube expansion and manual tube end are processed, resulting in cumbersome operations. , The production efficiency is low.

Utility model content

One object of the present utility model is to provide a radiator expansion tube and tube end processing equipment, so as to overcome the defects of complicated operation and low production efficiency in the related art.

The technical solution adopted by the utility model to solve the technical problem is to provide a radiator expansion pipe and pipe end processing equipment, including a frame, a positioning device, a station switching device, a pipe expansion device and a pipe end device; the frame is provided with a workbench; the positioning device is arranged on the workbench to fix the radiator; the station switching device includes a first power assembly disposed on the frame and a mounting plate that is drive-connected to the first power assembly; the pipe expansion device includes a second power assembly a power assembly and a pipe expansion head; the second power assembly is arranged on the mounting plate and is drive-connected with the pipe expansion head to drive the pipe expansion head to be close to or away from the nozzle in the radiator; the pipe end device includes a third power assembly, a constriction head and a flat head; the third power assembly is arranged on the mounting plate, and is respectively connected with the constriction head and the flat head to drive the constriction head and the flat head to be close to or away from the nozzle of the radiator; the first power assembly drives the The mounting plate moves back and forth, so as to realize the switch between the tube expansion station and the tube end station.

The utility model provides a radiator expansion pipe and pipe end processing equipment. The radiator is fixed on a workbench by a positioning device, and then the station switching device is used to sequentially switch the pipe expansion device and the pipe end device to the working position. Expanding, shrinking and flattening the nozzle of the radiator greatly improves the automation and production efficiency of production operations.

In some embodiments, the first power assembly includes a switching motor, a switching screw and a switching nut; the switching nut is fixedly connected to the mounting plate; the switching screw is threadedly connected to the switching nut; the switching motor is arranged in In the frame, it is connected with the switching screw drive to drive the switching screw to rotate, thereby driving the switching nut and the mounting plate to move back and forth.

In some embodiments, the second power assembly includes a tube expansion motor, a tube expansion screw and a tube expansion nut; the tube expansion head is fixed on the tube expansion nut; the end of the tube expansion screw close to the positioning device It is threadedly connected with the expansion nut, and the end away from the positioning device is connected with the expansion motor; the expansion motor is fixed on the mounting plate and drives the expansion screw to rotate, thereby driving the expansion nut and the expansion head to approach or stay away from Orifice of the radiator.

In some embodiments, the pipe expanding device further includes a reference block, a movable block and a connecting rod I; the connecting rod I is inserted into the reference block, and one end is fixedly connected to the pipe expanding head, and the other end is fixed to the pipe expanding head. The movable block on the expansion screw is fixed.

In some embodiments, the third power assembly includes a pipe end oil cylinder, a connecting rod II and a connecting rod III; one end of the connecting rod II close to the positioning device is fixedly connected to the neck head, and the other end far from the positioning device is connected to the pipe end The piston rod of the oil cylinder is connected; the end of the connecting rod III close to the positioning device is fixedly connected with the flat head, and the other end away from the positioning device is connected with the piston rod of the pipe end oil cylinder; the pipe end oil cylinder is fixed on the workbench, driving Narrow and flat mouth close to or away from the mouth of the tube that has been expanded.

In some embodiments, the pipe end device further comprises an adapter plate, a support plate and a compression spring; the piston rod of the pipe end oil cylinder is respectively connected with the connecting rod II and the connecting rod III through the adapter plate; the support plate The connecting rod II and the connecting rod III are inserted into the supporting plate; the compression spring is squeezed between the adapter plate and the supporting plate.

In some embodiments, the positioning device includes a locking mechanism and a pipe pressing mechanism; the locking mechanism includes a locking block, a locking cylinder and a latch; the locking block is arranged on the workbench, and is provided with a locking mechanism in the radiator. The U-shaped groove adapted to the U-shaped tube; the locking cylinder is arranged above the locking block, and the piston rod of the locking cylinder is fixedly connected with the plug, so as to drive the plug to be inserted into the gap in the U-shaped tube, and the U-shaped tube Restricted in the locking block; the pipe pressing mechanism is set on the workbench to press the radiator.

In some embodiments, the tube pressing mechanism includes a tube pressing bracket, a tube pressing cylinder and a tube pressing plate; the tube pressing bracket is fixed on the workbench; the tube pressing cylinder is fixed on the tube pressing bracket, and the tube pressing The piston rod of the tube cylinder is fixedly connected with the tube plate, which drives the tube plate closer to or away from the radiator.

In some embodiments, the positioning device further includes a nozzle clamping mechanism and a pipe jacking mechanism; the nozzle clamping mechanism includes a clamping bracket, a clamping oil cylinder, an upper clamping plate and a lower clamping plate; the clamping bracket is fixed on the On the workbench, a through hole is opened in the clamping bracket; a gap matching the shape of the pipe opening after the expansion of the pipe is opened on the upper clamp plate and the lower clamp plate; the lower clamp plate is fixed on the through hole. bottom; the clamping oil cylinder is fixed on the clamping bracket, the piston rod of the clamping oil cylinder is fixedly connected with the upper clamping plate, and drives the upper clamping plate to be close to or away from the lower clamping plate; the pipe jacking mechanism is arranged on the worktable and connected with the locking block , drive the locking mechanism and the radiator closer to or away from the lower plate.

In some embodiments, the positioning device further includes an adjustment mechanism; the adjustment mechanism includes a handwheel, an adjustment screw and an adjustment nut; the adjustment nut is fixed on the worktable; the adjustment screw and the adjustment nut are threaded One end is fixedly connected with the pipe jacking mechanism, and the other end is coaxially connected with the hand wheel; when the hand wheel rotates, the adjusting screw rotates together to drive the pipe jacking mechanism, the locking mechanism and the radiator closer to or away from the expanding pipe device.

Description of drawings

The utility model will be further described below in conjunction with the accompanying drawings and embodiments, in the accompanying drawings:

Fig. 1 is the three-dimensional schematic diagram of the radiator expansion pipe and the pipe end processing equipment of the embodiment of the present utility model;

Fig. 2 is the partial schematic diagram of another angle of the radiator expansion pipe and pipe end processing equipment in Fig. 1;

Fig. 3 is the three-dimensional schematic diagram of the locking mechanism of the embodiment of the present invention;

Fig. 4 is the three-dimensional schematic diagram of the pipe pressing mechanism of the embodiment of the present invention;

5 is a perspective view of a nozzle clamping mechanism according to an embodiment of the present invention;

Fig. 6 is the three-dimensional schematic diagram of the station switching device at position A in Fig. 1;

FIG. 7 is a perspective view of a tube expanding device according to an embodiment of the present invention;

8 is a perspective view of a pipe end device according to an embodiment of the present invention.

The reference numerals are explained as follows:

100-radiator; 1-rack;

2-locking mechanism; 21-locking block; 22-locking cylinder; 23-locking bracket;

3-pipe pressure mechanism; 31-pipe pressure bracket; 32-pipe pressure cylinder; 33-pipe pressure plate;

4-nozzle clamping mechanism; 41-clamping bracket; 42-clamping cylinder; 43-upper splint; 44-lower splint;

5-pipe jacking mechanism; 51-pipe jacking bracket; 52-pipe jacking cylinder;

6-adjustment mechanism; 61-handwheel; 62-adjustment screw; 63-adjustment bracket;

7-station switching device; 71-installation plate; 72-switching motor; 73-switching screw;

8-expansion device; 81-expansion head; 82-expansion motor; 83-expansion screw; 84-expansion nut; 85-reference block; 86-movable block; 87-connecting rod I;

9-pipe end device; 91-reduction head; 92-flat head; 93-pipe end cylinder; 94-connecting rod II; 95-connecting rod III; 96-support; 97-transfer plate; 98-support plate; 99 - Compression spring.

Detailed ways

Typical embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present utility model can have various changes in different embodiments without departing from the scope of the present utility model, and the descriptions and illustrations therein are essentially for the purpose of illustration rather than use to limit the utility model.

As shown in FIGS. 1 to 3 , this embodiment provides a radiator tube expansion and tube end processing equipment for processing a radiator 100 , which includes a frame 1 , a positioning device, a station switching device 7 , and a tube expansion device 8 and pipe end fittings 9. Among them, the frame 1 is used as the main bearing structure, the upper surface is provided with a workbench, and the interior is provided with an electric control module. The positioning device is arranged on the workbench for fixing the radiator 100 . The station switching device 7 includes a first power assembly disposed on the frame 1 and a mounting plate 71 in driving connection with the first power assembly. The tube expansion device 8 includes a second power assembly and a tube expansion head 81 . The second power component is disposed on the mounting plate 71 and is drive-connected with the tube expansion head 81 to drive the tube expansion head 81 to be close to or away from the nozzle in the radiator 100 . The pipe end device 9 includes a third power assembly, a constriction head 91 and a flat head 92 . The third power component is arranged on the mounting plate 71 and is respectively connected with the constriction head 91 and the flat head 92 , and drives the constriction head 91 and the flat head 92 to be close to or away from the nozzle of the radiator 100 .

The radiator 100 is fixed on the workbench by the positioning device, and then the pipe expanding device 8 and the pipe end device 9 are switched to the working position in sequence by the station switching device 7, and the pipe opening of the radiator 100 is expanded and contracted. And flat mouth processing, which greatly improves the automation degree and production efficiency of production operations.

Specifically, referring to FIG. 3 , the positioning device includes a locking mechanism 2 and a tube pressing mechanism 3 . The locking mechanism 2 includes a locking block 21, a locking cylinder 22 and a latch (not shown). The locking block 21 is arranged on the workbench through the locking bracket 23 , and has a U-shaped groove corresponding to the U-shaped tube in the radiator 100 . The locking cylinder 22 is arranged on the locking bracket 23 and is located above the locking block 21. The piston rod of the locking cylinder 22 is fixedly connected with the plug, so as to drive the plug to be inserted into the gap position in the U-shaped pipe and restrict the U-shaped pipe In the locking block 21 (refer to the iron padlock in use in daily life). The tube pressing mechanism 3 is provided on the workbench for pressing the radiator 100 .

The initial positioning of the radiator 100 is achieved by placing the U-shaped tube at one end of the radiator 100 into the U-shaped groove, and then driving the pin into the gap in the U-shaped tube by locking the cylinder 22, and finally pressing the tube The heat sink 100 is pressed and held to achieve full positioning of the heat sink 100 .

Referring to FIG. 4 , the tube pressing mechanism 3 includes a tube pressing bracket 31 , a tube pressing cylinder 32 and a tube pressing plate 33 . The pressing tube support 31 is fixed on the workbench. The tube-pressing cylinder 32 is fixed on the tube-pressing bracket 31 , and the piston rod of the tube-pressing cylinder 32 is fixedly connected with the tube-pressing plate 33 , which drives the tube-pressing plate 33 to be close to or away from the radiator 100 , thereby realizing the compression of the radiator 100 . Preferably, in this embodiment, there are two sets of tube-pressing cylinders 32 and tube-pressing plates 33 . In other embodiments, the pressure tube cylinder 32 can be replaced by an oil cylinder, an electric cylinder, a screw pair structure, or a magnetic suction structure.

Referring to FIG. 3 and FIG. 5 together, in order to improve the stability of the nozzle during necking and flattening operations, the positioning device further includes a nozzle clamping mechanism 4 and a pipe jacking mechanism 5 . The nozzle clamping mechanism 4 includes a clamping bracket 41 , a clamping oil cylinder 42 , an upper clamping plate 43 and a lower clamping plate 44 . The clamping bracket 41 is fixed on the worktable, a through hole is formed in the clamping bracket 41, and longitudinal sliding grooves are formed on both sides of the through hole. The upper clamping plate 43 and the lower clamping plate 44 are both provided with a notch matching the shape of the pipe opening after expanding the pipe. The lower clamping plate 44 is fixed at the bottom of the through hole. The clamping oil cylinder 42 is fixed on the clamping bracket 41 , and the piston rod of the clamping oil cylinder 42 is fixedly connected with the upper clamp plate 43 , and drives the upper clamp plate 43 to move up and down along the chute, so as to approach or stay away from the lower clamp plate 44 . In other embodiments, the clamping oil cylinder 42 can be replaced by an air cylinder, an electric cylinder, a screw pair structure, or a magnetic attraction structure. The pipe jacking mechanism 5 includes a pipe jacking bracket 51 and a pipe jacking oil cylinder 52 . The pipe jacking oil cylinder 52 is set on the workbench through the pipe jacking bracket 51 , and is connected to the locking bracket 23 to drive the locking mechanism 2 and the radiator 100 to be close to or away from the lower clamping plate 44 .

After the tube is expanded, the locking mechanism 2 and the radiator 100 are pushed out a certain distance in the direction of the tube end device 9 by the tube jacking mechanism 5, and the tube opening of the expanded tube is inserted into the gap of the lower clamping plate 44, and then clamped The oil cylinder 42 drives the upper splint 43 to descend, and the upper splint 43 cooperates with the lower splint 44 to clamp and fix the nozzle portion, ready for the necking and flattening operations.

Continuing to refer to FIGS. 1 to 3 , the positioning device is further provided with an adjustment mechanism 6 . The adjusting mechanism 6 includes a hand wheel 61 , an adjusting screw 62 and an adjusting nut. The adjusting nut is embedded in the adjusting bracket 63 and fixed on the workbench through the adjusting bracket 63 . The adjusting screw 62 is threadedly connected with the adjusting nut in the adjusting bracket 63 , one end is fixedly connected with the jacking bracket 51 in the jacking mechanism 5 , and the other end is coaxially connected with the handwheel 61 . Both sides of the adjusting screw 62 are also provided with guide shafts for guiding. But it can be understood that a high-precision servo motor can also be used instead of the hand wheel 61 for adjustment.

When facing radiators 100 with different lengths and specifications, by providing the adjusting mechanism 6, when the handwheel 61 is turned, the adjusting screw 62 also rotates together, thereby driving the jacking mechanism 5, the locking mechanism 2 and the radiator 100 to approach or Move away from the tube expansion device 8 until the nozzle is adjusted to the most suitable tube expansion position.

Referring to FIG. 6 , the station switching device 7 includes a first power assembly and a mounting plate 71 . The first power assembly includes a switching motor 72, a switching screw 73 and a switching nut (not shown). The switching nut is fixed to the bottom surface of the mounting plate 71 . The switching screw 73 is threadedly connected to the switching nut. The switch motor 72 is arranged at the bottom of the worktable, and is connected to the switch screw 73 through a pulley structure, and drives the switch screw 73 to rotate, thereby driving the switch nut and the mounting plate 71 to move back and forth. Similarly, the above-mentioned lead screw pair structure can also be replaced by a cylinder or a linear motor. More preferably, the bottom surface of the mounting plate 71 is also provided with sliding rails, so as to improve the sliding accuracy and stability.

By switching the forward and reverse rotation of the motor 72, the mounting plate 71 is driven to move back and forth along the slide rail, thereby realizing the automatic replacement of the tube expanding station, the shrinking station, and the flat station, which is very convenient and efficient.

Referring to FIG. 7 , the tube expansion device 8 includes a second power assembly and a tube expansion head 81 . The second power assembly includes a tube expansion motor 82 , a tube expansion screw 83 and a tube expansion nut 84 . The expansion head 81 is fixed on the expansion nut 84 . One end of the tube expansion screw 83 close to the positioning device is threadedly connected with the tube expansion nut 84 , and one end away from the positioning device is connected with the tube expansion motor 82 in a driving manner. Guide shafts are provided on both sides of the expansion screw 83 to assist the movement of the expansion nut 84 . The tube expansion motor 82 is fixed on the mounting plate 71, and drives the tube expansion screw 83 to rotate through the pulley structure, thereby driving the tube expansion nut 84 and the tube expansion head 81 to be close to or away from the nozzle of the radiator 100, eliminating the need for manual tube expansion .

Continuing to refer to FIG. 7 , the tube expanding device 8 further includes a reference block 85 , a movable block 86 and a connecting rod I87 . The connecting rod I87 is inserted into the reference block 85 , and one end is fixedly connected with the pipe expansion head 81 , and the other end is fixedly connected with the movable block 86 fixed on the pipe expansion screw 83 . When the tube expansion motor 82 drives the tube expansion screw 83 to rotate, the tube expansion nut 84 will move forward along the axial direction of the tube expansion screw 83. At this time, the reference block 85 is fixed, and the tube expansion head 81 passes through the connecting rod I87. Pulling the movable block 86 also moves forward. When the movable block 86 abuts against the reference block 85, the displacement of the expansion nut 84 is limited, and the expansion nut 84 and the expansion head 81 stop moving.

Referring to FIG. 8 , the pipe end device 9 in this embodiment includes a third power component, a constriction head 91 and a flat head 92 . Wherein, the third power assembly includes a pipe end oil cylinder 93 , a connecting rod II 94 and a connecting rod III 95 . One end of the connecting rod II 94 close to the positioning device is fixedly connected with the constriction head 91 , and the other end away from the positioning device is connected with the piston rod of the pipe end oil cylinder 93 . One end of the connecting rod III 95 close to the positioning device is fixedly connected with the flat head 92 , and the other end away from the positioning device is connected with the piston rod of the pipe end oil cylinder 93 . The pipe end oil cylinder 93 is fixed on the workbench, and drives the constricted mouth head 91 and the flat mouth head 92 to be close to or away from the pipe mouth that has been expanded, thereby eliminating the need for manual pipe end work. In other embodiments, only one of the constricted head 91 or the flat head 92 may be assembled on the third power component. Similarly, in other embodiments, the third power component can also be replaced with a cylinder or an electric cylinder.

With continued reference to FIG. 8 , the pipe end device 9 also includes a standoff 96 , an adapter plate 97 , a support plate 98 and a compression spring 99 . The pipe end oil cylinder 93 is fixed on the workbench through the support 96 . In this embodiment, the side of the adapter plate 97 close to the pipe end oil cylinder 93 is provided with a transverse chute, and the end of the piston rod of the pipe end oil cylinder 93 is provided with a slider matched with the transverse chute. The piston rod of the pipe end oil cylinder 93 is respectively connected with the connecting rod II 94 and the connecting rod III 95 through the adapter plate 97 . The support plate 98 is vertically fixed on the mounting plate 71 . The connecting rod II 94 and the connecting rod III 95 are inserted into the support plate 98 . The connecting rod II 94 and the connecting rod III 95 are both sleeved with a compression spring 99 , and the compression spring 99 is squeezed between the adapter plate 97 and the support plate 98 .

By providing a compression spring 99 between the adapter plate 97 and the support plate 98, when the piston rod of the pipe end oil cylinder 93 is extended, the compression spring 99 is compressed, and the elastic force increases, so that the constriction head 91 and the flat head 92 are connected to the pipe mouth. Make soft contact to avoid bumping the nozzle position.

In particular, in order to prevent the clamping bracket 41 from being easily loosened due to impact force, the support 96 and the clamping bracket 41 are connected by a reinforcement shaft.

Based on the above description of the structure of the radiator expansion tube and tube end processing equipment, the following describes the processing method of the equipment in detail:

Put the workpiece of the radiator 100 into the locking mechanism 2, the locking cylinder 22 drives the bolt to descend, and the bolt is inserted into the gap position in the U-shaped tube exposed outside the radiator 100 to complete the feeding. According to the length specification of the workpiece of the radiator 100, the hand wheel 61 in the adjustment mechanism 6 is rotated to adjust the pipe opening of the radiator 100 to a suitable position for expanding the pipe, and the machine adjustment is completed. Then, the tube pressing cylinder 32 in the tube pressing mechanism 3 drives the tube pressing plate 33 to descend, and the radiator 100 is pressed and fixed. The switching motor 72 in the station switching device 7 drives the switching screw 73 to rotate, thereby driving the switching nut to move along the switching screw 73 to the position facing the nozzle, and enter the tube expansion station. The tube expansion motor 82 in the tube expansion device 8 drives the tube expansion screw 83 to rotate, thereby driving the tube expansion nut 84 to move along the tube expansion screw 83, close to the tube mouth, and perform tube expansion processing on the tube mouth. After the tube expansion is completed, the tube expansion motor 82 is reversed to drive the tube expansion nut 84 away from the nozzle to reset. Then, the pipe pressing mechanism 3 releases the radiator 100, the piston rod of the pipe jacking oil cylinder 52 in the pipe jacking mechanism 5 is extended, and the nozzle of the radiator 100 is pushed between the upper clamp plate 43 and the lower clamp plate 44, and the pipe is pressed. The mechanism 3 presses the radiator 100 again. The clamping cylinder 42 in the nozzle clamping mechanism 4 drives the upper clamping plate 43 to descend, and cooperates with the lower clamping plate 44 to clamp the nozzle part. Then the switching motor 72 drives the mounting plate 71 and the structure on it to move upward (in the direction shown in the figure) through the switching screw 73 until the necking head 91 faces the nozzle, and switches to the necking station. The pipe end oil cylinder 93 in the pipe end device 9 drives the necking head 91 to approach the pipe opening of the expanded pipe through the connecting rod II 94 to shrink the pipe opening. After the necking is completed, the piston rod of the pipe end oil cylinder 93 is retracted, and the necking head 91 is withdrawn from the position of the pipe opening. The switching motor 72 drives the mounting plate 71 and the structure on it to move upward again through the switching screw 73 until the flush head 92 faces the nozzle, and switches to the flush station. The pipe end oil cylinder 93 in the pipe end device 9 drives the flat mouth close to the pipe mouth that has been expanded through the connecting rod III95, and the pipe mouth is flushed, and the finished product is completed. After the flushing is completed, the piston rod of the pipe end oil cylinder 93 is retracted, and the flushing head 92 is withdrawn from the position of the pipe mouth. Finally, the switching motor 72 drives the mounting plate 71 to reset, the clamping oil cylinder 42 drives the upper clamp plate 43 to reset, the tube pressing cylinder 32 drives the tube pressing plate 33 to reset, and the pipe jacking cylinder 52 drives the radiator 100 to reset, and the finished product is taken out.

While the present invention has been described with reference to the above-described exemplary embodiments, it is to be understood that the terms used are of description and illustration, and not of limitation. Since the invention can be embodied in various forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be broadly within the spirit and scope defined by the appended claims Therefore, all changes and modifications that come within the scope of the claims or their equivalents are intended to be covered by the appended claims.

Claims (10)

1. The utility model provides a radiator expand tube and pipe end processing equipment which characterized in that includes:

a frame provided with a worktable;

the positioning device is arranged on the workbench and used for fixing the radiator;

the station switching device comprises a first power assembly arranged on the rack and a mounting plate in transmission connection with the first power assembly;

the tube expansion device comprises a second power assembly and a tube expansion head; the second power assembly is arranged on the mounting plate and is in transmission connection with the tube expansion head to drive the tube expansion head to be close to or far away from a tube opening in the radiator;

a pipe end device comprising a third power assembly, a necking head and a plain head; the third power assembly is arranged on the mounting plate and is in transmission connection with the necking head and the flat head respectively to drive the necking head and the flat head to be close to or far away from the pipe orifice of the radiator;

the mounting plate is driven to reciprocate by the first power assembly, so that the switching between a pipe expanding station and a pipe end station is realized.

2. The heat sink tube expander and tube end machining apparatus according to claim 1, wherein the first power assembly includes a switching motor, a switching lead screw, and a switching nut; the switching nut is fixedly connected with the mounting plate; the switching lead screw is in threaded connection with the switching nut; the switching motor is arranged in the rack and is in transmission connection with the switching lead screw to drive the switching lead screw to rotate, so that the switching nut and the mounting plate are driven to move in a reciprocating mode.

3. The heat sink tube expansion and tube end machining apparatus according to claim 1, wherein the second power assembly includes a tube expansion motor, a tube expansion lead screw, and a tube expansion nut; the tube expansion head is fixedly arranged on the tube expansion nut; one end of the tube expansion lead screw, which is close to the positioning device, is in threaded connection with the tube expansion nut, and the other end of the tube expansion lead screw, which is far away from the positioning device, is in transmission connection with the tube expansion motor; the tube expansion motor is fixedly arranged on the mounting plate and drives the tube expansion lead screw to rotate, so that the tube expansion nut and the tube expansion head are driven to be close to or far away from the tube opening of the radiator.

4. The heat radiator tube expansion and tube end processing equipment according to claim 3, wherein the tube expansion device further comprises a reference block, a movable block and a connecting rod I; the connecting rod I is inserted into the reference block, one end of the connecting rod I is fixedly connected with the tube expansion head, and the other end of the connecting rod I is fixedly connected with the movable block fixedly arranged on the tube expansion screw rod.

5. The heat radiator tube expansion and tube end machining device according to claim 1, wherein the third power assembly comprises a tube end oil cylinder, a connecting rod II and a connecting rod III; one end of the connecting rod II, which is close to the positioning device, is fixedly connected with the necking head, and the other end of the connecting rod II, which is far away from the positioning device, is connected with a piston rod of the pipe-end oil cylinder; one end of the connecting rod III close to the positioning device is fixedly connected with the plain end, and the other end of the connecting rod III far away from the positioning device is connected with a piston rod of the pipe end oil cylinder; the pipe end oil cylinder is fixedly arranged on the workbench and drives the necking head and the flat head to be close to or far away from the pipe orifice of the expanded pipe.

6. The heat sink tube expander and tube end processing apparatus as claimed in claim 5, wherein said tube end device further comprises an adapter plate, a support plate and a compression spring; a piston rod of the pipe-end oil cylinder is respectively connected with the connecting rod II and the connecting rod III through the adapter plate; the supporting plate is fixedly arranged on the mounting plate; the connecting rods II and III are inserted in the supporting plates; the compression spring is compressed between the adapter plate and the support plate.

7. The heat sink tube expander and tube end processing apparatus as claimed in any one of claims 1 to 6, wherein said positioning means comprises

The locking mechanism comprises a locking block, a locking cylinder and a bolt; the locking block is arranged on the workbench and provided with a U-shaped groove matched with a U-shaped pipe in the radiator; the locking cylinder is arranged above the locking block, and a piston rod of the locking cylinder is fixedly connected with the bolt, so that the bolt is driven to be inserted into a gap in the U-shaped pipe, and the U-shaped pipe is limited in the locking block;

and the pipe pressing mechanism is arranged on the workbench and used for pressing the radiator.

8. The heat sink tube expansion and tube end processing apparatus according to claim 7, wherein the tube pressing mechanism includes a tube pressing bracket, a tube pressing cylinder, and a tube pressing plate; the pressure pipe support is fixedly arranged on the workbench; the pressure pipe cylinder is fixedly arranged on the pressure pipe support, a piston rod of the pressure pipe cylinder is fixedly connected with the pressure pipe plate, and the pressure pipe plate is driven to be close to or far away from the radiator.

9. The heat sink tube expander and tube end machining apparatus of claim 8, wherein the positioning device further comprises

The pipe orifice clamping mechanism comprises a clamping bracket, a clamping oil cylinder, an upper clamping plate and a lower clamping plate; the clamping bracket is fixedly arranged on the workbench, and a through hole is formed in the clamping bracket; the upper clamping plate and the lower clamping plate are both provided with notches matched with the shape of the pipe orifice after pipe expansion; the lower clamping plate is fixedly arranged at the bottom of the through hole; the clamping oil cylinder is fixedly arranged on the clamping support, and a piston rod of the clamping oil cylinder is fixedly connected with the upper clamping plate to drive the upper clamping plate to be close to or far away from the lower clamping plate;

and the pipe jacking mechanism is arranged on the workbench and connected with the locking block, and drives the locking mechanism and the radiator to be close to or far away from the lower clamping plate.

10. The heat sink tube expander and tube end machining apparatus according to claim 9, wherein the positioning device further comprises an adjustment mechanism; the adjusting mechanism comprises a hand wheel, an adjusting screw rod and an adjusting nut; the adjusting nut is fixedly arranged on the workbench; the adjusting screw rod is in threaded connection with the adjusting nut, one end of the adjusting screw rod is fixedly connected with the pipe jacking mechanism, and the other end of the adjusting screw rod is coaxially connected with the hand wheel; when the hand wheel rotates, the adjusting screw rod rotates together to drive the pipe jacking mechanism, the locking mechanism and the radiator to be close to or far away from the pipe expanding device.

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