CN117531923B

CN117531923B - Horizontal pipe expander and processing method thereof

Info

Publication number: CN117531923B
Application number: CN202410022220.8A
Authority: CN
Inventors: 吴世钊
Original assignee: Foshan General Refrigeration Equipment Co ltd
Current assignee: Foshan General Refrigeration Equipment Co ltd
Priority date: 2024-01-08
Filing date: 2024-01-08
Publication date: 2024-04-05
Anticipated expiration: 2044-01-08
Also published as: CN117531923A

Abstract

The invention discloses a horizontal tube expander and a processing method thereof, which relate to the field of tube expanding processing of metal tubes and comprise a fixing device and a tube expanding device; the fixing device comprises a first frame, a movable mounting mechanism, a movable pressing mechanism and a movable turntable mechanism; the first rack is provided with a first sliding rail and a second sliding rail; the movable turntable mechanism comprises a turntable sliding plate and a turntable, the turntable sliding plate is arranged on the first sliding rail in a sliding way, and the turntable is rotatably arranged on the turntable sliding plate; the turntable is provided with a plurality of limiting clamping working surfaces and is provided with clamping pieces; the movable pressing mechanism comprises a movable bracket and a lower pressing plate mechanism; the movable support is arranged on the second sliding rail in a sliding way, and the lower pressing plate mechanism is arranged on the movable support; the movable mounting mechanism comprises a lifting frame, a third sliding rail, a movable supporting plate and a lifting frame driving assembly, and the movable supporting plate is arranged on the lifting frame in a sliding manner; the lifting frame is driven to lift by the lifting frame driving assembly. The device has the advantages of high flexibility in the process of expanding the pipe of the large-size nonstandard workpiece, small occupied area and low cost.

Description

Horizontal pipe expander and processing method thereof

Technical Field

The invention relates to the field of metal pipe expanding processing, in particular to a horizontal pipe expander and a processing method thereof.

Background

The heat exchanger of the central air conditioner mainly comprises a radiating fin module and a radiating copper pipe inserted on the radiating fin module, wherein a pipe expander is used for expanding the radiating copper pipe to expand the radiating copper pipe, so that the radiating copper pipe is supported on the radiating fin module after being expanded and can form good close contact with radiating fins, and a good heat exchange effect is achieved. Most of the existing tube expander is vertical, the vertical tube expander cannot be too high due to the limitation of the height of a factory building, and the conventional heat exchanger with the length of less than 1.5 meters can be processed at most, so that the length of the heat exchanger to be processed is limited, and the large heat exchanger is not easy to feed. Compared with a vertical tube expander, the horizontal tube expander has low requirements on a factory building, and can be used for processing longer and larger heat exchangers. The existing horizontal tube expander generally comprises a fixing device for fixing the heat exchanger and a tube expanding device for expanding the inner diameter of a heat dissipation copper tube on the heat exchanger.

However, the existing horizontal tube expander still has the following defects:

the fixing device and the tube expansion device are arranged on the same horizontal plane, a heat exchanger workpiece to be processed is arranged on the fixing device, then the tube expansion device is adopted to expand the heat exchanger workpiece, after tube expansion is completed, the heat exchanger workpiece is detached, and then another heat exchanger workpiece is arranged on the fixing device to continue the next round of processing. The patent with publication number CN116274690A discloses a duplex feeding and discharging device of a horizontal tube expander, which utilizes a longitudinal space to arrange two groups of vertically stacked first-stage feeding and discharging mechanisms and second-stage feeding and discharging mechanisms, and the first-stage feeding and discharging mechanisms and the second-stage feeding and discharging mechanisms respectively control the feeding and discharging mechanisms to move back and forth through respective travelling mechanisms, so that the feeding and discharging modes of duplex stations of the horizontal tube expander are realized, the time consumption for replacing heat exchanger workpieces is reduced to a certain extent, but the structure is only applicable to replacement between heat exchanger workpieces with two specifications, and when the two heat exchanger workpieces with different specifications are replaced, the horizontal and transverse exchange positions are still needed except for the longitudinal lifting exchange positions, so that the occupied area of the horizontal tube expander is still larger, and the structure is complex. And because of the limitation of longitudinal height, the horizontal pipe expander can not design loading and unloading mechanisms with more specifications, such as a three-stage loading and unloading mechanism and a four-stage loading and unloading mechanism, and more importantly, the multi-stage loading and unloading mechanism is difficult to realize avoiding in a limited frame space when lifting and forward and backward movement are completed.

Therefore, the structure and the operation mode still cannot be adaptively adjusted in multiple dimensions according to the length, the width, the height and the like of the heat exchanger workpiece, and the working efficiency and the application flexibility of the heat exchanger workpiece are still low.

Disclosure of Invention

In order to overcome the defects of the prior art, one of the purposes of the invention is to provide a horizontal pipe expander.

The second purpose of the invention is to provide a processing method of the horizontal pipe expander. One of the purposes of the invention is realized by adopting the following technical scheme: a horizontal tube expander comprises a fixing device for fixing a heat exchanger workpiece to be processed and a tube expanding device for expanding the inner diameter of a heat dissipation copper tube on the heat exchanger workpiece;

the fixing device comprises a first frame, a movable mounting mechanism for adjusting the mounting length of the heat exchanger workpiece, a movable pressing mechanism for pressing the heat exchanger workpiece, and a movable turntable mechanism for adjusting and replacing different limiting working surfaces according to the length, width and height of the heat exchanger workpiece;

one end of the first frame is a processing station, and the other end of the first frame is a station to be processed; the upper surface and the outer side surface of the first rack are respectively provided with a first sliding rail and a second sliding rail which are arranged in parallel, and the first sliding rail and the second sliding rail extend from the processing station to the station to be processed;

The movable turntable mechanism comprises a turntable sliding plate and a turntable, wherein the turntable sliding plate is arranged on the first sliding rail in a sliding manner and slides along the length direction of the first sliding rail, and the turntable is rotatably arranged on the turntable sliding plate so as to adjust the length limiting positions of heat exchanger workpieces with different length specifications; the turntable is provided with a plurality of limiting clamping working surfaces, each limiting clamping working surface is provided with a plurality of positioning mounting holes, and a plurality of clamping pieces are correspondingly arranged on each positioning mounting hole according to the difference of the width and the height of the heat exchanger workpiece;

the movable pressing mechanism comprises a plurality of movable brackets and a lower pressing plate mechanism; each movable support is arranged on the second sliding rail in a sliding manner and slides along the length direction of the second sliding rail, and the lower pressing plate mechanism is arranged on each movable support;

the movable mounting mechanism comprises a lifting frame, third sliding rails, movable supporting plates and a lifting frame driving assembly, wherein the lifting frame is arranged on the inner side of the first frame, the two third sliding rails are arranged on the upper surface of the lifting frame in parallel, the number of the movable supporting plates is multiple, and each movable supporting plate is arranged on the lifting frame side by side and slides along the length direction of the third sliding rail so as to enable a heat exchanger workpiece to move on a processing station and a station to be processed; the lifting frame is driven by the lifting frame driving assembly to do lifting motion in the vertical direction.

Further, the movable mounting mechanism further comprises a limiting part used for fixing the heat exchanger workpiece on the movable supporting plate, an adjusting groove is formed in the movable supporting plate, a through hole is formed in the limiting part, and the limiting part penetrates through the through hole through a fastener and is limited in the adjusting groove, so that position adjustment and reinforcement limiting of the heat exchanger workpiece in the horizontal width direction are achieved.

Further, the lower pressure plate mechanism comprises a lower pressure plate and a lower pressure cylinder, wherein the cylinder body of the lower pressure cylinder is fixed on the movable support, and the telescopic rod of the lower pressure cylinder is fixed on the upper surface of the lower pressure plate.

Further, the clamping piece comprises a U-pipe clamp or/and a straight pipe clamp; the U pipe clamp or the straight pipe clamp can be detachably arranged in the positioning and mounting hole.

Further, the lifting frame driving assembly comprises a lifting frame guiding sliding assembly, a lifting frame motor, a linkage rod and a lifting screw rod assembly;

the lifting frame guide sliding assembly comprises a lifting frame sliding rail vertically arranged at the bottom of the lifting frame and a lifting frame sliding seat arranged on the first rack, and the lifting frame sliding rail is in sliding connection with the lifting frame sliding seat;

the lifting frame motor is in transmission connection with the lifting screw rod assembly through a linkage rod, so that the lifting frame moves in a lifting mode under the guiding action of the lifting frame driving assembly.

Further, the pipe expanding device comprises a pipe expanding mechanism and a front-back driving device for driving the pipe expanding mechanism to move back and forth towards the processing station; the tube expansion mechanism comprises a beam base, an expansion rod assembly, a chuck assembly and an expansion rod driving piece, wherein the expansion rod assembly is slidably arranged on the beam base, the chuck assembly is arranged at the front end of the expansion rod assembly and used for clamping a heat dissipation copper tube on a heat exchanger workpiece, and the expansion rod driving piece is used for pushing the expansion rod assembly to extend out of the chuck assembly; the front-back driving device drives the beam base to move back and forth in the direction of the processing station.

Further, the expansion rod assembly comprises an expansion rod and a plurality of sliding guide mechanisms sleeved on the expansion rod, wherein each sliding guide mechanism comprises a plurality of guide sliding shafts which are arranged on a beam base in parallel and guide plates sleeved on the guide sliding shafts; the guide plates are connected through ropes, a plurality of jacks are formed in the guide plates, and the expansion rods are movably inserted into the jacks; one end of the expansion rod is limited and fixed on the expansion rod top plate, the other end of the expansion rod is penetrated in the chuck assembly, the expansion rod driving piece is in transmission connection with the expansion rod top plate, and after the chuck assembly clamps the heat dissipation copper pipe, the expansion rod driving piece drives the expansion rod top plate to push towards the direction of a processing station so as to enable the expansion rod to extend out of the chuck assembly and directly enter the heat dissipation copper pipe to expand the heat dissipation copper pipe;

The clamping head assembly comprises a clamping jaw sleeve, a fixed inner sleeve, a movable outer sleeve, an expansion rod fixing block, an expansion rod sliding block and a clamping jaw cylinder; one end of the clamping jaw sleeve is provided with a clamping jaw, the other end of the clamping jaw sleeve is fixedly connected with the fixed inner sleeve, the movable outer sleeve is movably sleeved on the outer walls of the clamping jaw sleeve and the fixed inner sleeve, and the expansion rod sequentially and movably penetrates through the clamping jaw sleeve, the fixed inner sleeve and the movable outer sleeve; the fixed inner sleeve is locked and installed on the expansion rod fixing block through the locking piece, the clamping jaw sleeve is arranged on the expansion rod sliding block in a penetrating mode, the expansion rod sliding block is slidably installed on the beam base, the movable outer sleeve is sleeved on the outer wall of the clamping jaw sleeve and then abuts against the expansion rod sliding block, the cylinder body of the clamping jaw cylinder is fixed on the expansion rod fixing block, the telescopic rod of the clamping jaw cylinder is fixed on the expansion rod sliding block, so that clamping jaws of the clamping jaw sleeve are driven to be exposed out of the movable outer sleeve or stored in the movable outer sleeve, and loosening or clamping of the heat dissipation copper pipe is achieved.

Further, the horizontal pipe expander further comprises a second rack for mounting the pipe expanding device and a third rack for mounting the second rack;

The pipe expanding device further comprises a lifting driving device for driving the pipe expanding mechanism to move up and down along the vertical direction; the lifting driving device comprises a lifting motor, a screw rod linkage shaft assembly, a cross beam connecting seat and a lifting sliding rail; the lifting sliding rail is vertically arranged on the second frame, the cross beam connecting seat is slidably arranged on the lifting sliding rail, and the lifting motor drives the cross beam connecting seat to move up and down on the lifting sliding rail through the screw rod linkage shaft assembly;

the pipe expanding device further comprises a left-right driving device for driving the pipe expanding mechanism to reciprocate along the left-right direction; the left and right driving device comprises a left and right motor, a rack and a left and right sliding rail; the rack and the left and right sliding rails are arranged on the third rack in parallel, the second rack is arranged on the third rack in a sliding way through the left and right sliding rails, the left and right motors are arranged on the second rack, a gear is sleeved on a power output shaft of each of the left and right motors, and the gear is in meshed connection with the rack; the left motor and the right motor rotate, and the second rack is driven to move horizontally left and right on the third rack through meshed connection of the gear and the rack.

Further, the pipe expanding device also comprises a flaring mechanism for flaring and flanging the pipe orifice of the heat dissipation copper pipe on the heat exchanger workpiece; the flaring mechanism comprises a flaring assembly, a flaring front-back sliding mechanism and a rotating motor, wherein the flaring front-back sliding mechanism is used for driving the flaring assembly to move back and forth towards a processing station, and the rotating motor is used for driving the flaring assembly to rotate;

the flaring assembly comprises a flaring connecting piece, a spring and a flaring mounting piece, wherein the flaring connecting piece comprises a flaring part, a middle shaft part and a sliding splicing part which are sequentially connected; the surface of the flaring part is provided with a second-level inclined surface which gradually inclines outwards, namely a first-level inclined surface and a second-level inclined surface, the spring is sleeved on the middle shaft part of the flaring connecting piece, the sliding insertion part is provided with a limiting protrusion, and the flaring connecting piece is inserted on the flaring mounting piece through the matching of the sliding groove and the limiting protrusion;

the flaring front-back sliding mechanism comprises a flaring sliding cylinder fixedly arranged below the beam connecting seat and a flaring sliding plate slidingly connected below the beam connecting seat; the flaring assembly is fixedly arranged on the flaring sliding plate; the expansion link of the flaring slipping cylinder is fixedly connected with the flaring slipping plate and drives the flaring assembly to move back and forth along the direction of the processing station;

The rotating motor is arranged on the flaring sliding plate and is in transmission connection with the flaring mounting piece.

The second purpose of the invention is realized by adopting the following technical scheme: a tube expansion processing method suitable for nonstandard heat exchangers adopts the horizontal tube expander to perform tube expansion processing, and comprises the following steps:

(1) And (3) feeding: according to the length of the expansion pipe of the heat exchanger, moving different numbers of movable supporting plates and movable pressing mechanisms to the processing stations, fixedly mounting the heat exchanger workpiece on the movable supporting plates of the movable mounting mechanisms, uniformly distributing the movable pressing mechanisms on the surface of the heat exchanger workpiece to press the workpiece, and moving unused movable supporting plates and movable pressing mechanisms to the stations to be processed, wherein the unused movable supporting plates and movable pressing mechanisms are adjusted according to the length of the heat exchanger workpiece when waiting for the next feeding;

(2) Fixing: according to the difference of the width and the height of the heat exchanger, different limiting working surfaces on the movable turntable mechanism are selected, then the clamping pieces are matched with the clamping pieces through the positioning mounting holes, and the clamping pieces matched with the arrangement of the heat dissipation copper pipes on the workpieces with the specifications to be processed are arranged on the limiting working surfaces, so that the clamping pieces can clamp the heat dissipation copper pipes on the workpieces with the specifications to be processed, and the limiting and fixing of the workpieces with the heat exchanger on the processing stations are realized;

(3) Expanding pipe: the expansion rod in the pipe expansion device is controlled to stretch, the inner diameter of the heat dissipation copper pipe on the heat exchanger workpiece is enlarged by rotating and expanding, and the heat dissipation copper pipe is supported on the heat dissipation fin module after expanding and can form good close contact with the heat dissipation fins.

Compared with the prior art, the invention has the beneficial effects that:

(1) Aiming at the technical defects that the existing double-station horizontal pipe expander has single specification of processed workpieces (the length of the conventional processed workpieces is not more than 1.5 meters), one device can only be suitable for the workpieces with two specifications, and the double-station horizontal pipe expander has large occupied area and insufficient flexibility. According to the method, by designing the movable turntable mechanism, different limiting working surfaces are selected according to the width and the height of the workpiece, and each limiting working surface can be provided with required clamping pieces in advance according to the specification of the workpiece, so that workpieces in different batches can be replaced quickly; secondly, through the design movable supporting plate can reciprocate in the below of movable revolving stage mechanism, movable support can reciprocate in the top of movable revolving stage mechanism, movable revolving stage mechanism self also can freely reciprocate in the frame, thereby can adjust the processing length on the processing station according to the length of work piece, the adjustment of above-mentioned structure, make horizontal expand tube can be fit for the processing demand of various nonstandard work pieces, in length, width, high size adjustment, its adjustable degree of freedom is higher, can process the oversized work piece that length is greater than 4 meters, the flexibility is high in the processing of the work piece expand tube of bulky, specification nonstandard, reduce production facility quantity and purchasing cost, and need not additionally to occupy transverse space, area is little, whole has great advantage.

(2) The horizontal pipe expander is particularly suitable for machining a workpiece with an ultra-long specification, and because the workpiece is large in length, the horizontal pipe expander is further adjusted as follows: the limiting piece is designed on the movable supporting plate, so that the position of a workpiece to be machined in the width direction can be adjusted, the width of the workpiece can be limited and positioned, the stamping force of the workpiece for bearing the direct impact of the expansion rod in the pipe expansion device can be improved when the pipe expansion process is carried out, the position of the heat dissipation copper pipe is not easy to move, and the machining stability and the machining quality are improved. If the heat dissipation copper pipe is in telescopic displacement or transverse displacement, the heat dissipation quality of the product can be directly affected, and the copper pipe is cut again, so that the copper pipe is wasted.

(3) The horizontal pipe expander is particularly suitable for processing workpieces of various non-standard specifications, and because the lengths of the workpieces are different, the horizontal pipe expander is also adjusted in the aspect of workpiece length adjustment: the height of the lifting frame is adjusted through the lifting frame driving assembly, so that the movable supporting plate can move back and forth along the length direction of the lifting frame below the movable turntable mechanism, the bearing space of the movable supporting plate on the processing station is adjusted according to the length of the workpiece, and the bearing space of the next batch of different batches of the movable supporting plate on the station to be processed is vacated, so that different processing spaces are reserved and adjusted for processing workpieces of different specifications.

(4) The horizontal tube expander is particularly suitable for machining a workpiece with an ultra-long specification, and because the workpiece is large in length, the horizontal tube expander is further adjusted as follows on reinforcement of a heat dissipation copper tube: one end of the expansion rod is provided with a chuck assembly for clamping one end of the heat dissipation copper pipe, and the chuck assembly is combined with a clamping piece on the movable turntable mechanism for clamping the other end of the heat dissipation copper pipe, so that the whole heat dissipation copper pipe can be completely fixed and limited, the copper pipe is prevented from being offset and cannot be machined in place during pipe expansion machining, the quality of the expansion pipe is improved, and the loss of the copper pipe is reduced.

In addition, the traditional procedure needs to assemble expansion rods with different lengths and chuck assemblies according to the heat dissipation copper tubes with different specifications and sizes manually, and the application is particularly suitable for nonstandard workpiece processing by separating the expansion rods from the chuck assemblies; and the processing efficiency is improved.

(5) The horizontal tube expander is particularly suitable for machining a workpiece with ultra-long specification, and the following adjustment is further performed on the position adjustment of the expansion rod: the pipe expanding device is arranged on the second frame, and drives the chuck assembly arranged on the beam connecting seat to move up and down on the lifting slide rail through the design of the lifting driving device, so as to adjust the processing height position of the workpiece; through controlling drive arrangement through the design, drive the second frame and do the removal of horizontal left and right directions in the third frame, the adjustment with the processing width position of work piece, solved the customization product of traditional processing nonstandard size and need fix a position the processing through the manual work, the product size that processes through this structure is more accurate, the damage rate is lower.

(6) This application designs flaring mechanism on the pipe expander device to use same set of position adjustment mechanism (front and back drive arrangement, lift drive arrangement, control drive arrangement) jointly, can accomplish pipe expander and flaring process promptly with the station, make this pipe expander have the function of pipe expander and flaring simultaneously, reduced the work piece of transporting, readjusted work piece position's process, practice thrift process time, improvement production efficiency.

In addition, in flaring process, after the pipe expanding process, the pipe orifice of the heat dissipation copper pipe may have the condition of being not flush, at this time, the copper pipe which stretches out the fin group is longer may not be processed to preset welding port shape, the copper pipe which stretches out the fin group is shorter may not be processed, based on this, the structure of the flaring mechanism is designed, through the spring is added on the flaring assembly, in the flaring process, the sufficient activity allowance is obtained by utilizing the compression force exerted by the spring, the pipe orifice with different lengths is enabled to obtain a larger construction distance, the requirement of welding port shape is met, the problem that copper pipe closed loops cannot be formed or superfluous overlong copper pipe orifices need to be cut off at local positions due to different lengths is avoided, the production cost is reduced, and the product quality is improved.

(7) According to the method, the horizontal tube expander is adopted for tube expanding machining, the method is suitable for machining non-standard products such as customized products and large-volume products, the machining precision is high, the copper consumption can be saved, and by taking machining of 4-meter workpieces as an example, the copper consumption of each product can be reduced by 6-8%, so that the production cost is greatly reduced.

Drawings

FIG. 1 is a schematic view of a horizontal tube expander according to a preferred embodiment of the present invention;

FIG. 2 is a schematic view of a fixing device according to a preferred embodiment of the present invention;

FIG. 3 is an enlarged schematic view of FIG. 2 at a;

FIG. 4 is a schematic view of another angle of the fixing device according to the preferred embodiment of the present invention;

FIG. 5 is an enlarged schematic view of FIG. 4 at b;

FIG. 6 is a schematic view of a tube expansion device according to a preferred embodiment of the present invention;

FIG. 7 is a schematic view of another angle of the tube expansion device according to the preferred embodiment of the present invention;

FIG. 8 is an enlarged schematic view of FIG. 7 at c;

FIG. 9 is an enlarged schematic view of FIG. 7 at d;

FIG. 10 is a partially disassembled view of the tube expansion mechanism according to the preferred embodiment of the present invention;

FIG. 11 is an enlarged schematic view of FIG. 10 at e;

FIG. 12 is a schematic cross-sectional view of a tube expansion mechanism according to the preferred embodiment of the present invention;

FIG. 13 is a schematic view of a chuck assembly according to a preferred embodiment of the present invention;

FIG. 14 is a schematic view of a flaring mechanism according to a preferred embodiment of the present invention;

FIG. 15 is a schematic partial cross-sectional view of a flaring mechanism in accordance with a preferred embodiment of the present invention;

FIG. 16 is a schematic view of a flare assembly according to a preferred embodiment of the present invention;

in the figure: 100. a fixing device; 11. a first frame; 111. a first slide rail; 112. a second slide rail; 12. a movable mounting mechanism; 121. a lifting frame; 122. a third slide rail; 123. a movable supporting plate; 124. a crane drive assembly; 1241. the lifting frame guides the sliding component; 1242. a lifting frame motor; 1243. a linkage rod; 1244. lifting screw rod components; 125. a limiting piece; 13. a movable pressing mechanism; 131. a movable bracket; 132. a lower pressing plate; 133. a pressing cylinder; 14. a movable turntable mechanism; 141. a turntable sliding plate; 142. a turntable; 143. limiting and clamping the working surface; 144. positioning the mounting hole; 145. a clamping member;

200. a tube expanding device; 21. a tube expanding mechanism; 211. a beam base; 212. an expansion rod assembly; 2121. a sliding guide mechanism; 21211. a guide slide shaft; 21212. a guide plate; 213. a collet assembly; 2131. a jaw sleeve; 2132. fixing the inner sleeve; 21321. a confinement ring; 2133. a movable outer sleeve; 2134. an expansion rod fixing block; 2135. expansion rod sliding blocks; 2136. a clamping jaw cylinder; 2137. a locking member; 21371. a guide plate; 21372. a clamping plate; 21373. a clamping hole; 21374. avoidance holes; 21375. locking the air cylinder; 214. an expansion rod driving piece; 22. front and rear driving means; 23. A second frame; 24. a third frame; 25. a lifting driving device; 251. a lifting motor; 252. a screw rod linkage shaft assembly; 253. a beam connecting seat; 254. lifting the sliding rail; 26. a left-right driving device; 261. a left motor and a right motor; 262. a rack; 263. a left and a right sliding rail; 27. a flaring mechanism; 271. a flaring assembly; 2711. a flared connector; 27111. a flared portion; 27112. an intermediate shaft portion; 27113. a sliding plug-in part; 2712. a spring; 2713. a flare mount; 272. a flaring front-back sliding mechanism; 2721. a flaring sliding cylinder; 2722. a flaring sliding plate; 273. a rotating electric machine;

A1, a heat exchanger; a2, a heat dissipation copper pipe; b1, a processing station; and B2, a station to be processed.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.

As shown in fig. 1 to 16, a horizontal tube expander comprises a fixing device 100 for fixing a heat exchanger A1 workpiece to be processed and a tube expanding device 200 for expanding the inner diameter of a heat dissipation copper tube A2 on the heat exchanger A1 workpiece;

the fixing device 100 comprises a first frame 11, a movable mounting mechanism 12 for adjusting the mounting length of a heat exchanger workpiece, a movable pressing mechanism 13 for pressing the heat exchanger A1 workpiece, and a movable turntable mechanism 14 for adjusting and replacing different limiting working surfaces according to the length, width and height of the heat exchanger A1 workpiece;

one end of the first frame 11 is a processing station B1, and the other end is a station B2 to be processed; the upper surface and the outer side surface of the first frame 11 are respectively provided with a first slide rail 111 and a second slide rail 112 which are arranged in parallel, and the first slide rail 111 and the second slide rail 112 extend from the processing station to the station to be processed;

The movable turntable mechanism 14 comprises a turntable sliding plate 141 and a turntable 142, the turntable sliding plate 141 is slidably arranged on the first slide rail 111 through a screw rod assembly, a motor and other driving linkage mechanisms and slides along the length direction of the first slide rail 111, and the turntable 142 is rotatably arranged on the turntable sliding plate 141 so as to adjust the length limiting positions of the heat exchanger A1 workpieces with different length specifications; the turntable 142 is provided with a plurality of limiting clamping working surfaces 143, each limiting clamping working surface 143 is provided with a plurality of positioning mounting holes 144, and the positioning mounting holes 144 are correspondingly provided with a plurality of clamping pieces 145 according to different widths and heights of the heat exchanger A1 workpieces;

the movable pressing mechanism 13 comprises a plurality of movable brackets 131 and a lower pressing plate mechanism; each movable bracket 131 is slidably arranged on the second slide rail 112 and slides along the length direction of the second slide rail 112, and the lower pressing plate mechanism is arranged on each movable bracket 131;

the movable mounting mechanism 12 includes a lifting frame 121, a third sliding rail 122, a movable supporting plate 123, and a lifting frame driving assembly 124, where the lifting frame 121 is disposed at an inner side of the first frame, two third sliding rails 122 are disposed on an upper surface of the lifting frame 121 in parallel, the number of the movable supporting plates 123 is plural, each movable supporting plate 123 is disposed on the lifting frame 121 side by side, and slides along a length direction of the third sliding rail 122, so that a heat exchanger A1 workpiece moves on a processing station and a station to be processed; the lifting frame 121 is driven by the lifting frame driving assembly to do lifting motion in the vertical direction.

Aiming at the technical defects that the existing double-station horizontal pipe expander has single specification of processed workpieces (the length of the conventional processed workpieces is not more than 1.5 meters), one device can only be suitable for the workpieces with two specifications, and the double-station horizontal pipe expander has large occupied area and insufficient flexibility. According to the movable turntable mechanism 14, different limiting working surfaces are selected according to the width and the height of the workpiece, and each limiting working surface can be provided with required clamping pieces 145 in advance according to the specification of the workpiece, so that workpieces in different batches can be replaced quickly; secondly, through the design movable supporting plate 123 can reciprocate in the below of movable revolving stage mechanism 14, movable support 131 can reciprocate in the top of movable revolving stage mechanism 14, movable revolving stage mechanism 14 itself also can freely reciprocate in the frame, thereby can adjust the processing length on the processing station according to the length of work piece, the adjustment of above-mentioned structure, make horizontal expand tube can be fit for the processing demand of various nonstandard work pieces, in length, width, high size adjustment, its adjustable degree of freedom is higher, can process the oversized work piece that length is greater than 4 meters, in the processing of the work piece expand tube of bulky, specification nonstandard flexibility is high, reduce production facility quantity and purchasing cost, and need not additionally to occupy horizontal space, occupation area is little, whole has great advantage.

As a further preferable scheme, the movable mounting mechanism 12 further includes a limiting member 125 for fixing the heat exchanger A1 workpiece on the movable supporting plate 123, an adjusting slot is formed on the movable supporting plate 123, a through hole is formed in the limiting member 125, and the limiting member 125 is located in the adjusting slot after passing through the through hole by a fastener (not shown in the drawing), so as to realize position adjustment and reinforcement limiting of the heat exchanger A1 workpiece in the horizontal width direction.

The horizontal pipe expander is particularly suitable for machining a workpiece with an ultra-long specification, and because the workpiece is large in length, the horizontal pipe expander is further adjusted as follows: the limiting piece 125 is designed on the movable supporting plate 123, so that the position adjustment of a workpiece to be processed in the width direction can be adjusted, and the limitation and positioning of the width of the workpiece can be realized, thereby being capable of improving the stamping force of the workpiece for bearing the direct impact of the expansion rod in the pipe expansion device 200 during the pipe expansion process, ensuring that the position of the heat dissipation copper pipe A2 is not easy to move, and improving the processing stability and the processing quality. If the heat dissipation copper pipe A2 is in telescopic displacement or transverse displacement, the heat dissipation quality of a product can be directly affected, and the copper pipe is cut again, so that the copper pipe is wasted.

As a further preferable scheme, the lower pressure plate mechanism includes a lower pressure plate 132 and a lower pressure cylinder 133, wherein a cylinder body of the lower pressure cylinder 133 is fixed on the movable bracket 131, and a telescopic rod of the lower pressure cylinder 133 is fixed on the upper surface of the lower pressure plate 132.

As a further preferred aspect, the clamping member 145 comprises a U-tube clamp or/and a straight tube clamp; the U-tube clamp or the straight tube clamp is detachably mounted in the positioning mounting hole 144. The clamping piece 145 of the present application is only required to be used for fixing the position of the heat dissipation copper pipe A2 in the heat dissipation fins by adopting the existing U-tube clamp or/and straight tube clamp, so that the stamping force of the expansion rod direct impact in the workpiece bearing expansion tube device 200 is improved, the position of the heat dissipation copper pipe A2 is not easy to move, and the processing stability and the processing quality are improved.

As a further preferred aspect, the crane driving assembly 124 includes a crane guiding sliding assembly 1241, a crane motor 1242, a linkage rod 1243, and a crane screw assembly 1244;

the lifting frame guiding sliding assembly 1241 comprises a lifting frame sliding rail vertically arranged at the bottom of the lifting frame and a lifting frame sliding seat arranged on the first frame 11, and the lifting frame sliding rail is in sliding connection with the lifting frame sliding seat;

The lift motor 1242 is in driving connection with the lift screw assembly 1244 via a linkage rod 1243, so that the lift is driven to move up and down by the lift driving assembly 124.

The horizontal pipe expander is particularly suitable for processing workpieces of various non-standard specifications, and because the lengths of the workpieces are different, the horizontal pipe expander is also adjusted in the aspect of workpiece length adjustment: the height of the lifting frame is adjusted through the lifting frame driving assembly, so that the movable supporting plate 123 can move back and forth along the length direction of the lifting frame under the movable turntable mechanism 14, the bearing space of the movable supporting plate 123 on the processing station B1 is adjusted according to the length of a workpiece, and the bearing space of the next batch of different batches is vacated for the movable supporting plate 123 on the station B2 to be processed, so that different processing spaces are reserved and adjusted for processing workpieces of different specifications.

As a further preferable scheme, the pipe expanding device 200 comprises a pipe expanding mechanism 21 and a front-back driving device 22 for driving the pipe expanding mechanism 21 to move back and forth towards the processing station B1;

the tube expansion mechanism 21 comprises a beam base 211, an expansion rod assembly 212 which is slidably arranged on the beam base 211, a clamping head assembly 213 which is arranged at the front end of the expansion rod assembly 212 and used for clamping a heat dissipation copper tube A2 on a workpiece of the heat exchanger A1, and an expansion rod driving piece 214 which pushes the expansion rod assembly 212 to extend out of the clamping head assembly 213; the front-rear driving device 22 drives the beam base 211 to move back and forth in the direction of the processing station B1.

As a further preferred aspect, the expansion rod assembly 212 includes an expansion rod (not shown), a plurality of sliding guide mechanisms 2121 sleeved on the expansion rod, the sliding guide mechanisms 2121 include a plurality of guiding sliding shafts 21211 arranged on the beam base 211 in parallel, and a guiding plate 21212 sleeved on the guiding sliding shafts 21211; the guide plates 21212 are connected by ropes (not shown), a plurality of insertion holes are formed in the guide plates 21212, and the expansion rods are movably inserted into the insertion holes; one end of the expansion rod is limited and fixed on the expansion rod top plate, the other end of the expansion rod is penetrated in the chuck assembly 213, the expansion rod driving piece 214 is in transmission connection with the expansion rod top plate, and after the chuck assembly 213 clamps the heat dissipation copper pipe A2, the expansion rod driving piece 214 drives the expansion rod top plate to push towards the direction of the processing station B1 so that the expansion rod extends out of the chuck assembly 213 and directly enters the heat dissipation copper pipe A2 to expand the pipe;

the chuck assembly 213 comprises a jaw sleeve 2131, a fixed inner sleeve 2132, a movable outer sleeve 2133, an expansion rod fixing block 2134, an expansion rod sliding block 2135, and a jaw cylinder 2136; one end of the clamping jaw sleeve 2131 is provided with a clamping jaw, the other end of the clamping jaw sleeve 2131 is fixedly connected with the fixed inner sleeve 2132, the movable outer sleeve 2133 is movably sleeved on the outer walls of the clamping jaw sleeve 2131 and the fixed inner sleeve 2132, and the expansion rod is sequentially and movably arranged in the clamping jaw sleeve 2131, the fixed inner sleeve 2132 and the movable outer sleeve 2133 in a penetrating manner; the fixed inner sleeve 2132 is locked and installed on the expansion rod fixing block 2134 through a locking piece 2137, the clamping jaw sleeve 2131 is arranged on the expansion rod sliding block 2135 in a penetrating mode, the expansion rod sliding block 2135 is arranged on the beam base 211 in a sliding mode, the movable outer sleeve 2133 is sleeved on the outer wall of the clamping jaw sleeve and then abuts against the expansion rod sliding block 2135, the cylinder body of the clamping jaw cylinder 2136 is fixed on the expansion rod fixing block 2134, and the telescopic rod of the clamping jaw cylinder 2136 is fixed on the expansion rod sliding block 2135 so as to drive the clamping jaw of the clamping jaw sleeve 2131 to be exposed out of the movable outer sleeve 2133 or stored in the movable outer sleeve 2133, and accordingly loosening or clamping of the heat dissipation copper pipe A2 is achieved.

The specific fixing structure for detachably mounting the collet assembly 213 on the expansion rod fixing block 2134 by using the locking member 2137 is as follows: the expansion rod fixing block 2134 is provided with a seat hole for the clamp assembly 213 to pass through, the locking piece 2137 is provided with a guide plate 21371 and a clamping plate 21372, the guide plate 21371 is also provided with an accommodating hole communicated with the seat hole, the clamping plate 21372 is provided with a clamping hole 21373 and an avoidance hole 21374 intersecting with the clamping hole 21373, the clamping hole 21373 and the avoidance hole 21374 intersect to form a calabash shape integrally, the fixing inner sleeve 2132 is provided with a convex limiting ring 21321, the clamping plate 21372 is controlled to move up and down through a locking cylinder 21375, and the position of the limiting ring 21321 is switched between the clamping hole 21373 and the avoidance hole 21374, so that the locking or loosening function is realized, and the replacement and maintenance of the clamp assembly 213 are realized.

The horizontal tube expander is particularly suitable for machining a workpiece with an ultra-long specification, and because the workpiece is large in length, the horizontal tube expander is further adjusted in the following way on the reinforcement of the heat dissipation copper tube A2: one end of the expansion rod is provided with a clamping head assembly 213 for clamping one end of the heat dissipation copper pipe A2, and the clamping piece 145 on the movable turntable mechanism 14 is combined for clamping the other end of the heat dissipation copper pipe A2, so that the whole heat dissipation copper pipe A2 can be completely fixed and limited, the copper pipe is prevented from being offset and cannot be processed in place during pipe expansion processing, the quality of the expansion pipe is improved, and the copper pipe loss is reduced.

In addition, the traditional procedure needs to assemble expansion rods with different lengths and different chuck assemblies 213 one by one according to the heat dissipation copper tubes A2 with different specifications and sizes, and the application is particularly suitable for nonstandard workpiece processing by separating the expansion rods from the chuck assemblies 213, and the technical scheme only needs to assemble a small number of expansion rods with different specifications and sizes, control the pushing distance of the expansion rods and detachably assemble the chuck assemblies 213, so that the expansion rods and the chuck assemblies 213 of the heat exchanger pipelines with different specifications can be quickly switched, and the equipment debugging time is shortened; and the processing efficiency is improved.

As a further preferable scheme, the horizontal pipe expander further comprises a second rack 23 for mounting the pipe expander 200 and a third rack 24 for mounting the second rack 23;

the pipe expanding device 200 further comprises a lifting driving device 25 for driving the pipe expanding mechanism 21 to move up and down along the vertical direction; the lifting driving device 25 comprises a lifting motor 251, a screw rod linkage shaft assembly 252, a beam connecting seat 253 and a lifting sliding rail 254; the lifting slide rail 254 is vertically installed on the second frame 23, the beam connecting seat 253 is slidably installed on the lifting slide rail 254, and the lifting motor 251 drives the beam connecting seat 253 to move up and down on the lifting slide rail 254 through the screw rod linkage shaft assembly 252;

The pipe expanding device 200 further comprises a left-right driving device 26 for driving the pipe expanding mechanism 21 to reciprocate along the left-right direction; the left-right driving device 26 comprises a left-right motor 261, a rack 262 and a left-right sliding rail 263; the rack 262 and the left and right sliding rails 263 are installed on the third rack 24 in parallel, the second rack 23 is installed on the third rack 24 in a sliding manner through the left and right sliding rails 263, the left and right motors 261 are installed on the second rack 23, a gear is sleeved on a power output shaft of the left and right motors 261, and the gear is in meshed connection with the rack 262; the left and right motor 261 rotates, and drives the second frame 23 to move horizontally left and right on the third frame 24 through the meshing connection of the gear and the rack 262.

The horizontal tube expander is particularly suitable for machining a workpiece with ultra-long specification, and the following adjustment is further performed on the position adjustment of the expansion rod: the pipe expanding device 200 is arranged on the second frame 23, and drives the chuck assembly 213 arranged on the beam connecting seat 253 to move up and down on the lifting slide rail 254 by designing the lifting driving device 25, so as to adjust the processing height position of the workpiece; through controlling drive arrangement 26 in the design, drive second frame 23 and do the removal of horizontal left and right directions in third frame 24, the adjustment with the processing width position of work piece, solved the customization product of traditional processing nonstandard size and need fix a position the processing through the manual work, the product size that processes through this structure is more accurate, the damage rate is lower.

As a further preferable scheme, the pipe expanding device 200 further comprises a flaring mechanism 27 for flaring and flanging the pipe orifice of the heat dissipation copper pipe A2 on the workpiece of the heat exchanger A1; the flaring mechanism 27 comprises a flaring assembly 271, a flaring front-back sliding mechanism 272 for driving the flaring assembly 271 to move back and forth towards the processing station B1, and a rotating motor 273 for driving the flaring assembly 271 to rotate;

the flaring assembly 271 comprises a flaring connector 2711, a spring 2712 and a flaring mounting piece 2713, wherein the flaring connector 2711 comprises a flaring part 27111, an intermediate shaft part 27112 and a sliding plug part 27113 which are connected in sequence; the surface of the flaring part 27111 is provided with a second-level inclined surface which gradually inclines outwards, namely a first-level inclined surface and a second-level inclined surface, the spring 2712 is sleeved on the middle shaft part 27112 of the flaring connecting piece 2711, the sliding inserting part 27113 is provided with a limiting protrusion, and the flaring connecting piece 2711 is inserted on the flaring mounting piece 2713 through the matching of a sliding groove and the limiting protrusion;

the flaring front-back sliding mechanism 272 comprises a flaring sliding cylinder 2721 fixedly arranged below the beam connecting seat 253 and a flaring sliding plate 2722 in sliding connection below the beam connecting seat; the flaring assembly 271 is fixedly mounted on the flaring skid 2722; the telescopic rod of the flaring sliding cylinder 2721 is fixedly connected with the flaring sliding plate 2722 and drives the flaring assembly 271 to move back and forth along the direction of the processing station B1;

The rotating motor 273 is mounted on the flared slip plate 2722 and is in driving connection with the flared mounting member 2713.

The flaring mechanism 27 is used for further expanding the pipe orifice of the heat dissipation copper pipe A2 of the expanded pipe to form a welding joint welded with the U-shaped copper pipe, and is used for sealing the copper pipe and finishing the processing of the whole product of the heat exchanger. The expanding station and the flaring station of the existing vertical pipe expander are separated, and a rotary station is required to rotate a workpiece to switch station pieces. The horizontal pipe expander has the advantages that the pipe expanding station and the flaring station are arranged on the same side, workpieces do not need to be transferred, and machining is more convenient. Specifically, the flaring mechanism 27 is designed on the pipe expanding device 200, and the same set of position adjusting mechanisms (the front and rear driving device 22, the lifting driving device 25 and the left and right driving device 26) are commonly used, namely, the pipe expanding and flaring procedures can be completed at the same station, so that the pipe expander has the functions of pipe expanding and flaring, the procedures of transferring workpieces and readjusting the positions of the workpieces are reduced, the processing time is saved, and the production efficiency is improved.

In addition, in the flaring process, after the pipe expanding process, the pipe orifice of the heat dissipation copper pipe A2 may have the condition of being not flush, at this time, the copper pipe with the longer extending fin group may not be processed to the preset welding port shape, the copper pipe with the shorter extending fin group may not be processed, based on this, the structure of the flaring mechanism 27 is designed, through the spring 2712 is added on the flaring component 271, in the flaring process, the pressing force exerted by the spring 2712 is utilized, the sufficient activity allowance is obtained by the flaring part 27111, the pipe orifice with each length being not flush can obtain a larger construction distance, the requirement of the welding port shape is met, the problem that a copper pipe closed loop cannot be formed or the redundant overlong copper pipe orifice needs to be cut off at a local position is avoided, the production cost is reduced, and the product quality is improved.

The application also provides a processing method for the expansion tube of the nonstandard heat exchanger A1, which adopts the horizontal tube expander to perform the tube expansion processing and comprises the following steps:

(1) And (3) feeding: according to the length of the heat exchanger A1, moving different numbers of movable supporting plates 123 and movable pressing mechanisms 13 to the processing station B1, fixedly mounting the heat exchanger A1 workpiece on the movable supporting plates 123 of the movable mounting mechanisms 12, uniformly distributing the movable pressing mechanisms 13 on the surfaces of the heat exchanger workpiece to press the workpiece, and moving unused movable supporting plates 123 and movable pressing mechanisms 13 to the processing station B2 to wait for the next feeding, and adjusting according to the length of the heat exchanger workpiece;

(2) Fixing: according to the difference of the width and the height of the heat exchanger A1, different limiting working surfaces on the movable turntable mechanism 14 are selected, then the clamping pieces 145 matched with the arrangement of the heat dissipation copper pipes on the workpieces with the specifications to be processed are arranged on each limiting working surface through the positioning mounting holes, so that the clamping pieces 145 can clamp the heat dissipation copper pipes A2 on the workpieces with the specifications to be processed, and the limiting and fixing of the workpieces of the heat exchanger A1 on the processing station B1 are realized;

(3) Pre-positioning: the expansion rod in the pipe expanding device 200 is controlled to extend out of the chuck assembly 213 to be pre-positioned with a heat dissipation copper pipe A2 of a pipe to be expanded which is fixed on a heat exchanger A1 on a processing station B1;

(4) Expanding pipe: after the preset position, the expansion rod retreats into the chuck assembly 213, drives the clamping jaw cylinder to drive the clamping jaw of the clamping jaw sleeve 2131 to be accommodated in the movable outer sleeve 2133, clamps the heat dissipation copper pipe A2, and extends out of the chuck assembly 213 and gradually stretches into the heat dissipation copper pipe A2 to expand the inner diameter of the heat dissipation copper pipe A2 so as to be supported on the heat dissipation fin module after being expanded;

(5) Flaring: after tube expansion is completed, the position of the flaring mechanism 27 is adjusted by adjusting the front-back driving device 22, the lifting driving device 25 and the left-right driving device 26 so as to be positioned with a heat dissipation copper tube of a heat exchanger on the processing station B1, the flaring sliding cylinder 2721 and the rotating motor 273 are driven, and the flaring assembly 271 is driven to advance and rotate into the heat dissipation copper tube A2, so that flaring and flanging of the tube orifice of the heat dissipation copper tube A2 are carried out.

According to the method, the horizontal tube expander is adopted for tube expanding machining, the method is suitable for machining non-standard products such as customized products and large-volume products, the machining precision is high, the copper consumption can be saved, and by taking machining of 4-meter workpieces as an example, the copper consumption of each product can be reduced by 6-8%, so that the production cost is greatly reduced.

The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.

Claims

1. The horizontal tube expander is characterized by comprising a fixing device for fixing a heat exchanger workpiece to be processed and a tube expanding device for expanding the inner diameter of a heat dissipation copper tube on the heat exchanger workpiece;

the fixing device comprises a first frame, a movable mounting mechanism for adjusting the mounting length of the heat exchanger workpiece, a movable pressing mechanism for pressing the heat exchanger workpiece, and a movable turntable mechanism for adjusting and replacing different limiting working surfaces according to the length, the width and the height of the heat exchanger workpiece;

2. The horizontal tube expander as set forth in claim 1, wherein the movable mounting mechanism further comprises a limiting member for fixing the heat exchanger workpiece on the movable supporting plate, an adjusting groove is provided on the movable supporting plate, a through hole is provided on the limiting member, and the limiting member is limited in the adjusting groove after passing through the through hole by a fastener, so as to realize position adjustment and reinforcement limiting of the heat exchanger workpiece in the horizontal width direction.

3. The horizontal tube expander of claim 1, wherein the lower platen mechanism comprises a lower platen and a lower air cylinder, the cylinder body of the lower air cylinder is fixed on the movable bracket, and the telescopic rod of the lower air cylinder is fixed on the upper surface of the lower platen.

4. A horizontal tube expander as claimed in claim 1 wherein said clamping members comprise U-tube clamps or/and straight tube clamps; the U pipe clamp or the straight pipe clamp can be detachably arranged in the positioning and mounting hole.

5. The horizontal tube expander of claim 1 wherein the crane drive assembly comprises a crane guide slide assembly, a crane motor, a linkage rod, and a crane lead screw assembly;

6. The horizontal tube expander of claim 1, wherein the tube expander comprises a tube expander mechanism and a front-rear drive for driving the tube expander mechanism to move forward and backward toward the processing station; the tube expansion mechanism comprises a beam base, an expansion rod assembly, a chuck assembly and an expansion rod driving piece, wherein the expansion rod assembly is slidably arranged on the beam base, the chuck assembly is arranged at the front end of the expansion rod assembly and used for clamping a heat dissipation copper tube on a heat exchanger workpiece, and the expansion rod driving piece is used for pushing the expansion rod assembly to extend out of the chuck assembly; the front-back driving device drives the beam base to move back and forth in the direction of the processing station.

7. The horizontal tube expander of claim 6, wherein the expander assembly comprises an expander rod and a plurality of sliding guide mechanisms sleeved on the expander rod, and the sliding guide mechanisms comprise a plurality of guide sliding shafts arranged on the beam base in parallel and guide plates sleeved on the guide sliding shafts; the guide plates are connected through ropes, a plurality of jacks are formed in the guide plates, and the expansion rods are movably inserted into the jacks; one end of the expansion rod is limited and fixed on the expansion rod top plate, the other end of the expansion rod is penetrated in the chuck assembly, the expansion rod driving piece is in transmission connection with the expansion rod top plate, and after the chuck assembly clamps the heat dissipation copper pipe, the expansion rod driving piece drives the expansion rod top plate to push towards the direction of a processing station so as to enable the expansion rod to extend out of the chuck assembly and directly enter the heat dissipation copper pipe to expand the heat dissipation copper pipe;

8. The horizontal tube expander of claim 6 further comprising a second frame for mounting said tube expander and a third frame for mounting said second frame;

9. The horizontal tube expander of claim 8, wherein the tube expander further comprises a flaring mechanism for flaring and flanging the tube orifice of the heat-dissipating copper tube on the heat exchanger workpiece; the flaring mechanism comprises a flaring assembly, a flaring front-back sliding mechanism and a rotating motor, wherein the flaring front-back sliding mechanism is used for driving the flaring assembly to move back and forth towards a processing station, and the rotating motor is used for driving the flaring assembly to rotate;

10. A method for processing an expanded tube of a non-standard heat exchanger, characterized in that the method for processing the expanded tube by using the horizontal tube expander as claimed in any one of claims 1 to 9 comprises the following steps: