CN111975390A - Processing production line and processing method of convection tube - Google Patents

Abstract

The invention relates to a processing production line for a convection tube, comprising a blank rack, a feeding device, a grinding device, a conveying line and a pipe bending machine. Between the loading device and the grinding device, the blank rack is used to store the blank tube, the loading device transports the blank tube to the grinding device, and the grinding device includes a grinding assembly and a supporting top material assembly, the supporting top The material assembly pushes the polished blank tube to the entrance of the conveying line, and the conveying line conveys the blank tube to the head of the pipe bender. The conveying line is provided with a first positioning device, and the pipe bender is provided with a second Positioning means. The invention greatly improves the processing automation of the convection tube, reduces the handling times of the blank tube in the process of processing, adopts mechanical positioning instead of manual scribing positioning, has high production efficiency, and reduces labor costs, and is suitable for industrialized production of convection tubes.

Description

A kind of processing production line and processing method of convection tube

technical field

The invention relates to the technical field of convection tube fabrication, in particular to a processing production line and a processing method of a convection tube.

Background technique

The convection tube is the convection heating surface of the water tube boiler. Its function is to absorb the heat of the high temperature flue gas and increase the heating surface of the boiler. The formed convection tube has a straight section in the middle and a curved section at both ends. In the prior art, the straight billet tube is first ground on both ends of the grinding machine to make the two ends smooth, and then transported to the scribing area to scribe the parts that need to be bent before and after the billet tube, and finally the billet tube is transported to the bend. The pipe machine bends the pipe at both ends of the scribed part, and the processing of the convection pipe has a low degree of automation. The blank pipe needs to be transported many times during the processing process. The positioning of the bend pipe is manually scribed, which has low production efficiency, high labor cost and high labor intensity.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the above-mentioned deficiencies, and to provide a processing production line and a processing method for a convection tube, the degree of automation of the processing of the convection tube is greatly improved, the number of handling times of the blank tube in the processing process is reduced, and the bending tube positioning adopts mechanical positioning instead of manual positioning. Lined positioning, high production efficiency, low labor cost, suitable for industrial production of convection tubes.

The object of the present invention is achieved in this way:

A production line for processing convection tubes, comprising a blank rack, a feeding device, a grinding device, a conveying line and a pipe bender, a material trough is arranged between the blank rack and the feeding device, and the inlet of the conveying line is arranged at the feeding device. Between the device and the grinding device, the blank rack is used to store the blank tube, the feeding device transports the blank tube to the grinding device, and the grinding device includes a grinding assembly and a supporting top material assembly, and the supporting top material assembly will The polished blank tube is pushed to the entrance of the conveying line, and the conveying line conveys the blank tube to the head of the pipe bender. The conveying line is provided with a first positioning device, and the pipe bender is provided with a second positioning device. The first positioning device performs front-end bending positioning on the blank tube, and the second positioning device performs rear-end bending positioning on the blank tube.

The feeding device includes a feeding rack, a feeding assembly, a pushing assembly and a top feeding assembly;

The feeding end of the feeding frame is higher than the discharging end of the blank frame, the upper end of the feeding frame is inclined downward toward the direction of the grinding device, and the discharging end of the feeding frame is provided with a blocking block;

The feeding assembly includes a feeding rod and two lead screw motors;

The push assembly includes a push cylinder, a push rod and a push plate;

The top feeding assembly includes a top feeding cylinder, a top feeding rod and a top feeding plate.

The grinding device includes a slide rail, on which a grinding component is symmetrically arranged, and at least two supporting top material components are arranged between the two grinding components, and both the grinding component and the supporting top material component can be on the slide rail. Move back and forth.

The grinding assembly includes a base, and the base is provided with a support assembly, a clamping assembly and a grinding adjustment assembly;

The support assembly includes two rotatable support guide wheels, and the blank tube is in contact with the two support guide wheels at the same time;

The clamping assembly includes a mounting plate, a clamping cylinder, a clamping seat and a clamping head, the mounting plate is fixed on the base, the clamping head is rotatably arranged in the clamping seat, and the clamping seat is Connect with the piston rod of the clamping cylinder;

The grinding adjustment assembly includes a mounting frame, a grinding belt, a driving wheel, a first driven wheel and a second driven wheel, and the grinding belt is sleeved on the driving wheel and the two driven wheels.

The supporting and ejecting material assembly includes a supporting frame, and the supporting frame is provided with a supporting assembly and an ejecting material assembly. The ejecting material assembly includes an ejecting material cylinder and an ejecting material block, and the ejecting material block is directed toward the inlet of the conveying line. Slope down.

The upper side of the conveying line is provided with a positioning slide rail, and the first positioning device is movably arranged on the positioning slide rail. The first positioning device includes a fixed block and a rotating positioning block. A limit protrusion, the rotation positioning block is rotatably connected with the fixed block, the rotation positioning block is provided with a second limit protrusion, and the first limit protrusion corresponds to the second limit protrusion, The bottom of the rotating positioning block is provided with a baffle plate.

The pipe bending machine is provided with a second positioning mechanism, the second positioning mechanism is arranged in front of the first positioning mechanism, the second positioning device includes a positioning cylinder, the positioning cylinder is fixed on the pipe bending machine, and the positioning The piston rod of the cylinder is connected to the positioning block, and the positioning cylinder drives the positioning block to rise.

A processing method for a processing production line of a convection tube, using the above-mentioned processing production line, comprises the following steps:

Step 1, billet tube feeding;

Step 2, push the push board;

Step 3. The blank tube is ejected to the grinding station;

Step 4. The clamping component of the grinding station clamps the blank tube;

Step 5. Grinding both ends of the blank tube;

Step 6. The polished blank tube leaves the grinding station and enters the conveying line;

Step 7. The first positioning device positions the blank tube at the elbow at the front end, and the positioned blank tube is bent at the front end;

Step 8: The second positioning device positions the blank tube at the bend at the rear end, and the positioned blank tube is bent at the rear end to complete the bend at both ends of the convection tube.

The beneficial effects of the present invention are:

The invention greatly improves the automation degree of the convection tube processing, reduces the handling times of the blank tube in the process of processing, adopts mechanical positioning instead of manual scribing positioning, high production efficiency, low labor cost, and is suitable for the industrialized production of convection tubes.

Description of drawings

FIG. 1 is a front view of the present invention.

Figure 2 is a top view of the present invention.

FIG. 3 is a partial enlarged view of FIG. 2 .

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 2 .

FIG. 5 is a schematic diagram of the extended state of the pushing material cylinder in FIG. 4 .

FIG. 6 is a sectional view taken along line B-B of FIG. 2 .

FIG. 7 is a C-C cross-sectional view of FIG. 2 .

Figure 8 is a left side view of the clamping assembly at the front end of the slide rail.

FIG. 9 is a top view of the first positioning device.

Figure 10 is a left side view of the head of the pipe bender.

in:

Blank frame 1; upper end face 1.1;

Feeding device 2;

The feeding rack 2.1; the feeding rack 2.1; the blocking block 2.1.1;

Feeding assembly 2.2; Feeding rod 2.2.1; Screw motor 2.2.2; Lifting slide 2.2.3;

Pushing assembly 2.3; Pushing cylinder 2.3.1; Pushing rod 2.3.2; Pushing plate 2.3.3;

Top feeding assembly 2.4, top feeding cylinder 2.4.1; top feeding rod 2.4.2; top feeding plate 2.4.3;

trough 3;

Conveying line 4; first positioning mechanism 4.1; fixing block 4.1.1; first limiting protrusion 4.1.1.1; rotating positioning block 4.1.2; second limiting protrusion 4.1.2.1; baffle 4.1.2.2; positioning Slide rail 4.2;

Bending machine 5; Bending die 5.1; Bending die 5.1.1; Stamping die 5.1.2; Clamping die 5.1.3; Fixed module 5.1.4; Rotating outer arm 5.1.5; Second positioning mechanism 5.2; 1; Positioning stop 5.2.2;

Blank tube 6; slide rail 7;

Grinding component 8;

base 8.1;

Support assembly 8.2; Support guide wheel 8.2.1;

Clamping assembly 8.3; Mounting plate 8.3.1; Clamping cylinder 8.3.2; Clamping seat 8.3.3; Clamping head 8.3.4; Moving slide rail 8.3.5;

Grinding Adjustment Assembly 8.4; Mounting Frame 8.4.1; Grinding Belt 8.4.2; Drive Wheel 8.4.3; First Driven Wheel 8.4.4; Second Driven Wheel 8.4.5; Adjustment Block 8.4.6; First Driven Wheel Mounting seat 8.4.7; Adjusting cylinder 8.4.8; Adjusting rod 8.4.9;

Support ejector assembly 9; support frame 9.1; ejector assembly 9.2; ejector cylinder 9.2.1; ejector block 9.2.2.

Detailed ways

1-10, the present invention relates to a processing production line for convection tubes, including a blank rack 1, a feeding device 2, a grinding device, a conveying line 4 and a pipe bending machine 5. The blank rack 1 and the feeding device 2 are among the There is a material chute 3 between, the entrance of the conveying line 4 is arranged between the feeding device 2 and the grinding device, the blank rack 1 is used to store the blank tube 6, and the feeding device 2 transports the blank tube to the grinding device. , the grinding device includes a grinding component 8 and a supporting top material component 9, the supporting top material component 9 pushes the polished blank tube to the inlet of the conveying line 4, and the conveying line 4 conveys the blank tube to the pipe bender 5. nose.

The upper end surface of the blank frame 1 is an inclined surface, the upper end surface 1.1 is inclined downward toward the feeding device 2 , and the inclined surface structure of the upper end surface 1.1 helps the blank tube to roll to the trough 3 better.

The feeding device 2 includes a feeding frame 2.1, a feeding assembly 2.2, a pushing assembly 2.3 and a top feeding assembly 2.4. The feeding end of the feeding frame 2.1 is higher than the discharging end of the blank frame 1. The upper end of the rack 1 is inclined downward toward the direction of the grinding device, and the discharge end of the feeding rack 1 is provided with a stopper block 2.1.1.

The feeding assembly 2.2 includes a feeding rod 2.2.1 and two lead screw motors 2.2.2, the feeding rod 2.2.1 is arranged in the feeding trough 3, and the feeding rod 2.2.1 is connected to the blank tube 6 The axes of the feeding rod 2.2.1 are parallel, the top of the feeding rod 2.2.1 is inclined downward along the feeding direction, the lead screw motor 2.2.2 is fixed on the feeding frame 2.1 front and rear, and the lead screw of the lead screw motor 2.2.2 is There is a lift slide table 2.2.3, and the two ends of the feeding rod 2.2.1 are correspondingly connected with the lift slide table 2.2.3.

The push assembly 2.3 includes a push cylinder 2.3.1, a push rod 2.3.2 and a push plate 2.3.3. There are two push cylinders 2.3.1, and two push cylinders 2.3.1 are arranged laterally. The piston rod of the pushing cylinder 2.3.1 is jointly connected to the pushing rod 2.3.2. The pushing rod 2.3.2 is provided with a plurality of pushing plates 2.3.3 along the length direction. The pushing cylinder 2.3.1 pushes the piston rod, and the piston rod drives the The push rod 2.3.2 and the push plate 2.3.3 move toward the grinding device, and the push plate 2.3.3 extends the discharge end of the feeding rack 2.1 to the grinding device.

The top feeding component 2.4 includes a top feeding cylinder 2.4.1, a top feeding rod 2.4.2 and a top feeding plate 2.4.3. The two top feeding cylinders 2.4.1 are fixed on the side of the discharge end of the feeding rack 2.1, and the two The piston rods of the top feeding cylinders 2.4.1 are jointly connected to the top feeding rod 2.4.2, a plurality of top feeding plates 2.4.3 are arranged in the length direction of the top feeding rod 2.4.2, and the piston rods of the top feeding cylinder 2.4.1 extend out , the ejector rod 2.4.2 drives the ejector plate 2.4.3 on it to push out the blank tube inside the stopper block 2.1.1, the ejector plate 2.4.3 is inclined downward toward the grinding device, and the blank tube 6 is ejected out The trailing edge push plate 2.3.3 rolls down to the grinding device.

The grinding device includes a sliding rail 7, and a grinding assembly 8 is symmetrically arranged on the sliding rail 7, and at least two supporting ejector assemblies 9 are arranged between the two polishing assemblies 8. The polishing assembly 8 and the supporting ejector assembly are provided. 9 can be moved back and forth on the slide rail 7. The grinding assembly 8 includes a base 8.1. The base 8.1 is provided with a support assembly 8.2, a clamping assembly 8.3 and a grinding adjustment assembly 8.4. The support assembly 8.2 includes two adjustable parts. The rotating support guide wheel 8.2.1, the blank tube 6 is in contact with the two support guide wheels 8.2.1 at the same time.

The clamping assembly 8.3 includes a mounting plate 8.3.1, a clamping cylinder 8.3.2, a clamping seat 8.3.3 and a clamping head 8.3.4, the mounting plate 8.3.1 is fixed on the base 8.1, and the clamping The holding head 8.3.4 is rotatably arranged in the clamping seat 8.3.3, the clamping seat 8.3.3 is connected with the piston rod of the clamping cylinder 8.3.2, and the mounting plate 8.3.1 is provided with a moving slide Rail 8.3.5, the bottom of the clamping seat 8.3.3 is provided with a chute corresponding to the moving slide rail 8.3.5, the clamping cylinder 8.3.2 pushes the clamping seat 8.3.3 close to the blank tube to be clamped, the clamping seat 8.3.3 Move smoothly on the moving slide rail, the clamping head 8.3.4 is inserted into the inner hole of the blank tube to be clamped, and the two clamping heads 8.3.4 simultaneously clamp both ends of the blank tube.

The grinding adjustment assembly 8.4 includes a mounting frame 8.4.1, a grinding belt 8.4.2, a driving wheel 8.4.3, a first driven wheel 8.4.4 and a second driven wheel 8.4.5, and the grinding belt 8.4.2 It is sleeved on the driving wheel 8.4.3 and the two driven wheels. The first driven wheel 8.4.4 and the second driven wheel 8.4.5 are both adjustable structures. The driving wheel 8.4.3 is arranged at the bottom. The frame 8.4.1 is provided with an adjustment block 8.4.6, the first driven wheel 8.4.4 is connected to the first driven wheel mounting seat 8.4.7, and the first driven wheel mounting seat 8.4.7 is adjusted by the cylinder 8.4.8 Connect the adjusting block 8.4.6, the first driven wheel 8.4.4 is connected with the adjusting rod 8.4.9, the adjusting block 8.4.6 is provided with an adjusting chute corresponding to the adjusting rod 8.4.9, and the adjusting rod 8.4.9 is connected with the adjusting rod 8.4.9. The adjusting chute is tightened by bolts, and the grinding belt 8.4.2 is brought into contact with the end of the tube to be ground by adjusting the first driven wheel 8.4.4 and the second driven wheel 8.4.5.

The support and ejector assembly 9 includes a support frame 9.1, and a support assembly 8.2 and an ejector assembly 9.2 are arranged on the support frame 9.1. The ejector assembly 9.2 includes an ejector cylinder 9.2.1 and an ejector block 9.2.2, The top material block 9.2.2 is inclined downward towards the inlet of the conveyor line 4 .

The head of the pipe bending machine 5 is provided with a bending die 5.1. The bending die 5.1 includes a bending die 5.1.1, a pressing die 5.1.2, and a clamping die 5.1.3. The bending die 5.1.1 is inlaid with a fixed module 5.1.4. The motor can drive the curved die 5.1.1 and the fixed module 5.1.4 to rotate. The clamping die 5.1.3 is arranged on the rotating outer arm 5.1.5. The rotating outer arm 5.1.5 is connected to the curved die 5.1.1. 1. Coaxial rotation, the clamping mold 5.1.3 is opposite to the fixed module 5.1.4, and the compression mold 5.1.2 and the clamping mold 5.1.2 can translate to the inner wall of the fixed module 5.1.4.

The conveying line 4 is provided with a first positioning mechanism 4.1, and the upper side of the conveying line 4 is provided with a positioning slide rail 4.2. According to the different length specifications of the convection pipe, the position of the first positioning mechanism 4.1 on the conveying line 4 can be adjusted. The first positioning device 4.1 includes a fixed block 4.1.1 and a rotating positioning block 4.1.2. The fixed block 4.1.1 is movably arranged on the positioning slide rail 4.2. According to the length specifications of the convection pipe, it can be adjusted and fixed. The position of the block 4.1.1 on the conveyor line 4, the adjusted fixed block 4.1.1 is fixed with the positioning slide rail 4.2 by bolts, and the top of the fixed block 4.1.1 is provided with a first limit protrusion 4.1.1.1, The rotating positioning block 4.1.2 is rotatably connected with the fixing block 4.1.1, the rotating positioning block 4.1.2 is provided with a second limiting protrusion 4.1.2.1, the first limiting protrusion 4.1.1.1 and Corresponding to the second limiting protrusion 4.1.2.1, the bottom of the rotating positioning block 4.1.2 is provided with a baffle 4.1.2.2, the blank tube 6 passes through the first positioning device 4.1, and the baffle 4.1.2.2 is pushed by the blank tube 6 toward Before, the baffle 4.1.2.2 rotates counterclockwise with the rotating positioning block 4.1.2, the second limit protrusion 4.1.2.1 is far away from the first limit protrusion 4.1.1.1, after the blank tube 6 reaches the head of the bending machine, the blank The tail of the pipe is against the baffle 4.1.2.2, the baffle 4.1.2.2 rotates clockwise with the rotation of the positioning block 4.1.2, and the second limit protrusion 4.1.2.1 is locked with the first limit protrusion 4.1.1.1. , to realize the positioning at the front bend of the blank tube.

The pipe bending machine 5 is provided with a second positioning mechanism 5.2, the second positioning mechanism 5.2 is arranged in front of the first positioning mechanism 4.1, the second positioning device 5.2 includes a positioning cylinder 5.2.1, the positioning cylinder 5.2. 5.2.1 is fixed on the pipe bending machine, the piston rod of the positioning cylinder 5.2.1 is connected to the positioning block 5.2.2, the positioning cylinder 5.2.1 drives the positioning block 5.2.2 to rise, and the blank pipe after the front bending pipe is processed The tail part pushes back against the positioning block 5.2.2 to realize the positioning at the back bend of the blank tube.

A processing method of a convection tube, comprising the following steps:

Step 1: Loading the blank tube; the blank tube is stored on the blank rack, falls into the trough obliquely, drives the lead screw motor, and the lead screw motor drives the lifting slide table and the feeding rod on it upward, and falls into the blank tube of the trough It is pushed up by the feeding rod. When the lowest end of the inclined feeding rod exceeds the inlet end of the feeding rack, the blank tube on the feeding rod rolls down to the feeding frame, and the blank tube rolls down to the discharge end of the feeding frame to be blocked by the material. block block

Step 2, pushing the push plate; the push cylinder pushes the piston rod, the piston rod drives the push rod, and the push plate moves toward the support assembly, and the push plate extends the discharge end of the feeding rack toward the support assembly;

Step 3. The blank tube is ejected to the grinding station; the piston rod of the ejector feed cylinder is extended, and the ejector rod drives the ejector plate on it to eject the blank tube inside the stop block, and the ejector plate faces the grinding device. Inclined downward, the blank tube 6 rolls down to the support assembly along the push plate 2.3.3 after being pushed out;

Step 4: Clamping the blank tube at the grinding station; the clamping cylinder pushes the clamping seat to be close to the blank tube to be clamped, the clamping seat moves smoothly on the moving slide rail, and the clamping head is inserted into the blank tube to be clamped. Inner hole, two clamping heads clamp both ends of the blank tube at the same time;

Step 5. Grinding both ends of the blank tube; by adjusting the first driven wheel and the second driven wheel, the grinding belt is in contact with the end of the blank pipe to be ground, the driving wheel is driven by power, and the grinding belt is used to grind the end of the blank pipe;

Step 6. The polished blank tube leaves the grinding station and enters the conveying line; after grinding, the clamping cylinder pushes the clamping seat away from the blank tube. The top material block is topped to the entrance of the conveying line, and is conveyed forward by the conveying line;

Step 7. The first positioning device positions the blank tube at the elbow at the front end, and the positioned blank tube is subjected to front-end bending; after the blank tube reaches the head of the tube bending machine, the tail of the blank tube bears back against the baffle, blocking the front end of the blank tube. The plate rotates clockwise with the rotating positioning block, and the second limit protrusion and the first limit protrusion are positioned and stuck, realizing the positioning of the front bend of the blank tube. After positioning, the blank tube enters the bending die to bend the front end of the blank tube. The tube and the blank tube enter between the fixed module and the pressing die, the clipping die and the pressing die translate to the fixed module, and the curved die drives the clipping die on the rotating outer arm to rotate to realize the bending of the front end of the blank tube;

Step 8. The second positioning device positions the blank tube at the bend at the rear end, and the positioned blank tube is bent at the back end; the positioning cylinder drives the positioning block to rise, and the tail of the blank tube after the front bend is processed is backward Press the positioning stopper to realize the positioning of the back bend of the blank tube. After positioning, the blank tube enters the bending die to bend the rear end of the blank tube.

In addition to the above-mentioned embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement shall fall within the protection scope of the claims of the present invention.

Claims (8)

1. The utility model provides a processing lines of convection tube which characterized in that: the pipe bending machine comprises a blank rack (1), a feeding device (2), a polishing device, a conveying line (4) and a pipe bending machine (5), wherein a trough (3) is arranged between the blank rack (1) and the feeding device (2), an inlet of the conveying line 4 is arranged between the feeding device (2) and the polishing device, the blank rack (1) is used for storing a blank pipe (6), the blank pipe is conveyed to the polishing device by the feeding device (2), the polishing device comprises a polishing assembly (8) and a supporting and ejecting assembly (9), the supporting and ejecting assembly (9) pushes the polished blank pipe to the inlet of the conveying line (4), the blank pipe is conveyed to the head of the pipe bending machine (5) by the conveying line (4), a first positioning device (4.1) is arranged on the conveying line (4), a second positioning device (5.2) is arranged on the pipe bending machine, and the front end of the blank pipe is positioned by the first positioning device (4.1), and the second positioning device (5.2) is used for positioning the rear end bent pipe of the blank pipe.

2. A processing line for convection tubes as set forth in claim 1, wherein: the feeding device (2) comprises a feeding frame (2.1), a feeding assembly (2.2), a pushing assembly (2.3) and a top feeding assembly (2.4);

the feeding end of the feeding frame (2.1) is higher than the discharging end of the blank frame (1), the upper end surface of the feeding frame (1) is inclined downwards towards the polishing device, and the discharging end of the feeding frame (1) is provided with a material blocking block (2.1.1);

the feeding assembly (2.2) comprises a feeding rod (2.2.1) and two screw motors (2.2.2);

the pushing assembly (2.3) comprises a pushing cylinder (2.3.1), a pushing rod (2.3.2) and a pushing plate (2.3.3);

the top feeding assembly (2.4) comprises a top feeding cylinder (2.4.1), a top feeding rod (2.4.2) and a top material plate (2.4.3).

3. A processing line for convection tubes as set forth in claim 1, wherein: the polishing device comprises a sliding rail (7), polishing assemblies (8) are symmetrically arranged on the sliding rail (7), at least two supporting and ejecting assemblies (9) are arranged between the two polishing assemblies (8), and the polishing assemblies (8) and the supporting and ejecting assemblies (9) can move back and forth on the sliding rail (7).

4. A processing line for convection tubes as set forth in claim 3, wherein: the polishing assembly (8) comprises a base (8.1), and a supporting assembly (8.2), a clamping assembly (8.3) and a polishing adjusting assembly (8.4) are arranged on the base (8.1);

the supporting assembly (8.2) comprises two rotatable supporting guide wheels (8.2.1), and the blank tube (6) is simultaneously contacted with the two supporting guide wheels (8.2.1);

the clamping assembly (8.3) comprises a mounting plate (8.3.1), a clamping cylinder (8.3.2), a clamping seat (8.3.3) and a clamping head (8.3.4), the mounting plate (8.3.1) is fixed on the base (8.1), the clamping head (8.3.4) is rotatably arranged in the clamping seat (8.3.3), and the clamping seat (8.3.3) is connected with a piston rod of the clamping cylinder (8.3.2);

the grinding adjusting component (8.4) comprises a mounting frame (8.4.1), a grinding abrasive belt (8.4.2), a driving wheel (8.4.3), a first driven wheel (8.4.4) and a second driven wheel (8.4.5), wherein the grinding abrasive belt (8.4.2) is sleeved on the driving wheel (8.4.3) and the two driven wheels.

5. A processing line for convection tubes as set forth in claim 3, wherein: support liftout subassembly (9) including support frame (9.1), be equipped with supporting component (8.2) and liftout subassembly (9.2) on support frame (9.1), liftout subassembly (9.2) are including liftout cylinder (9.2.1) and liftout piece (9.2.2), liftout piece (9.2.2) are towards the entry direction downward sloping of transfer chain (4).

6. A processing line for convection tubes as set forth in claim 1, wherein: top one side of transfer chain (4) is equipped with location slide rail (4.2), and the mobilizable setting of first positioner (4.1) is on location slide rail (4.2), first positioner (4.1) includes fixed block (4.1.1) and rotation locating piece (4.1.2), fixed block (4.1.1) top is equipped with first spacing arch (4.1.1.1), rotation locating piece (4.1.2) and fixed block (4.1.1) rotatable coupling, rotation locating piece (4.1.2) are equipped with second spacing arch (4.1.2.1), first spacing arch (4.1.1.1) and second spacing arch (4.1.2.1) are corresponding, rotation locating piece (4.1.2) bottom is equipped with baffle (4.1.2.2).

7. A processing line for convection tubes as set forth in claim 1, wherein: be equipped with second positioning mechanism (5.2) on bending machine (5), second positioning mechanism (5.2) set up in the front of first positioning mechanism (4.1), second positioner (5.2) are including location cylinder (5.2.1), location cylinder (5.2.1) are fixed on the bending machine, location dog (5.2.2) is connected to the piston rod of location cylinder (5.2.1), and location dog (5.2.2) are driven in location cylinder (5.2.1) and are risen.

8. A processing method of a processing production line of convection tubes is characterized in that: a processing line for convection tubes as set forth in any one of claims 1-7, comprising the steps of:

step one, feeding a blank pipe;

pushing the pushing plate;

thirdly, ejecting the blank pipe to a polishing station;

step four, clamping the parison tube by a clamping assembly of the polishing station;

polishing two ends of the blank pipe;

sixthly, the polished blank pipe leaves the polishing station and enters a conveying line;

seventhly, positioning the bent pipe at the front end of the blank pipe by the first positioning device, and bending the front end of the positioned blank pipe;

and step eight, positioning the bent pipe at the rear end of the blank pipe by the second positioning device, and bending the rear end of the positioned blank pipe to finish bending the two ends of the convection pipe.

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