CN113399522A

CN113399522A - Multilateral bender

Info

Publication number: CN113399522A
Application number: CN202110518466.0A
Authority: CN
Inventors: 顾佑
Original assignee: Nantong Burt Cnc Machine Tool Co ltd
Current assignee: Nantong Burt Cnc Machine Tool Co ltd
Priority date: 2021-05-12
Filing date: 2021-05-12
Publication date: 2021-09-17

Abstract

The invention discloses a polygonal bending machine, belonging to the technical field of flanging machines, and the technical scheme is as follows: the automatic edge folding device comprises a supporting table, a first edge folding device, a second edge folding device and a third edge folding device, wherein the first edge folding device, the second edge folding device and the third edge folding device are fixedly arranged on the supporting table, the first edge folding device is positioned on the left side of the second edge folding device, the third edge folding device is positioned on the right side of the second edge folding device, the first edge folding device comprises a stepping motor, and the output end of the stepping motor is fixedly connected with a rotating shaft, and the automatic edge folding device has the beneficial effects that: can become the polygon with the work piece hem to through setting up roll adjustment board and angle modulation pole, change hem length and hem angle that can be convenient, convenient to use, simple structure cup joints the actuating lever through setting up the sleeve pipe, thereby realizes laborsaving purpose, and the extrusion force of mould is more even under the extrusion, makes the hem more even smooth and easy, and can conveniently change the bed die of different shapes, and the functionality is abundanter.

Description

Multilateral bender

Technical Field

The invention relates to the technical field of flanging machines, in particular to a polygonal bending machine.

Background

The flanging machine is a machine for processing the edge of a product, such as an automatic folding and packaging flanging machine of a lithium ion power battery adopting a multi-station rotating circulation mode, carries out flanging packaging on the lithium ion power battery through three stations, and simultaneously, each station adopts flanging cutter bodies with different angles, and has the characteristics of low cost, stable performance, high automation degree, convenient adjustment and the like, the flanging machine is a simple bending machine which can be manual or motorized, the simplest method is that a steel plate is firmly fixed on a machine tool workbench by using a model with a bending radius, the extending part of material is placed on another workbench, the workbench can rotate along the center of the bending radius, when the movable workbench rises, the flanging machine can bend stainless steel into a required angle, the stainless steel is obvious, when the bending is carried out, the stainless steel slides on the workbench, therefore, to prevent scratching of the stainless steel, the surface of the table must be smooth, and during actual processing, the stainless steel surface is usually protected with a plastic film.

The existing edge folding machine can only carry out edge folding through the upper die and the lower die, the edge folding shape is determined by the upper die and the lower die, the edge folding shape is required to be changed, only the upper die and the lower die can be replaced, the use is very inconvenient, and the structure is complex; even if the upper die and the lower die are replaced, the plate or the rod is inconvenient to fold into a polygon or a circle, and the edge folding function is single; the length and the angle of the folded edge can be adjusted only manually, so that the processing efficiency is greatly reduced; the folding pressure is not well controlled, so that the folding quality is not good enough; and when only a small number of workpieces are subjected to edge folding processing, resources are obviously wasted by using a complex edge folding machine.

Therefore, the invention is necessary to invent a polygonal bending machine.

Disclosure of Invention

Therefore, the invention provides a polygonal bending machine which can be used for flanging various shapes of hems by arranging a first flanging device, a second flanging device and a third flanging device, realizes the adjustment of the length and the angle of the hems by arranging an angle adjusting rod and a distance adjusting plate in the third flanging device, and solves the defects of the conventional flanging machine by arranging a lead screw to drive an upper die to move up and down so as to enable the pressure to be uniform and downward.

In order to achieve the above purpose, the invention provides the following technical scheme:

a polygonal bending machine comprises a supporting table, a first flanging device, a second flanging device and a third flanging device, wherein the first flanging device, the second flanging device and the third flanging device are fixedly arranged on the supporting table, the first flanging device is positioned on the left side of the second flanging device, and the third flanging device is positioned on the right side of the second flanging device;

the edge folding device comprises a stepping motor, the output end of the stepping motor is fixedly connected with a rotating shaft, the outer wall of the left end of the rotating shaft is sleeved with a rolling wheel, a pressing block is fixedly arranged on the outer wall of the rolling wheel, a sliding rail is arranged below the rolling wheel, and a sliding groove is formed in the sliding rail;

the edge folding device comprises a servo motor, two groups of main belt pulleys are sleeved on the outer wall of the output end of the servo motor, the main belt pulleys are connected with a belt in a transmission mode, the belt is connected with a driven belt pulley in a transmission mode, a screw rod is sleeved on the inner wall of the driven belt pulley, the outer side of the screw rod is wrapped by a sleeve, two ends of the screw rod are fixedly installed on the sleeve through bearings, the outer wall of the screw rod is in threaded connection with a nut, the outer wall of the nut is fixedly connected with a die base, an upper die is inserted into the inner wall of the bottom of the die base, a lower die I, a lower die II, a lower die III and a lower die IV are arranged below the upper die, the lower die I is located under the upper die, a semicircular groove is formed in the lower die I, the bottoms of the lower die II, the lower die III and the lower die IV are, Limiting plates are fixedly arranged on two sides of the second lower die, the third lower die and the fourth lower die through bolts;

the third flanging device comprises a first U-shaped frame, a second U-shaped frame and a pin rod, the first U-shaped frame and the second U-shaped frame pass through the pin rod and are movably connected, a plug pin is inserted into the inner walls of the first U-shaped frame and the second U-shaped frame, a gasket and a drag reduction bearing are sleeved on the outer wall of the plug pin, the gasket is located on two sides of the drag reduction bearing, two right-end fixed connection driving rods of the U-shaped frame are fixedly connected with a sleeve pipe, the right end of the driving rod is in threaded connection with the sleeve pipe, a distance adjusting plate is arranged below the left side of the first U-shaped frame, and an angle adjusting rod is arranged below the second U-shaped frame.

Preferably, the pressing block is connected with the rolling wheel through a bolt, and the bottom of the sliding rail is fixedly installed on the supporting table.

Preferably, the outer wall of the rotating shaft is fixedly connected with a stabilizing column through a bearing, and the bottom of the stabilizing column is fixedly arranged on the supporting table.

Preferably, the upper die is fixed with the die base through a bolt, and limiting holes are formed in two sides of the first lower die, the second lower die, the third lower die and the fourth lower die.

Preferably, a trapezoidal groove is formed in the second lower die, elliptical grooves are formed in the third lower die and the fourth lower die, and the bottom of the sleeve is fixedly connected with the supporting table.

Preferably, the bottom of the distance adjusting plate and the bottom of the angle adjusting rod are connected with the supporting platform through bolts.

Preferably, the support table is provided with a distance adjusting hole and an angle adjusting hole.

Preferably, the first flanging device further comprises a U-shaped rail, a placing groove and a rotating roller, the placing groove is formed in the sliding rail, the U-shaped rail is fixedly installed on the inner wall of the placing groove, and the rotating roller is fixedly installed on the inner wall of the U-shaped rail.

The invention has the beneficial effects that:

one end of a workpiece is arranged between a pressing block and a rolling wheel, a screw is tightened to enable the pressing block to tightly press the workpiece, a stepping motor is started, the output end of the stepping motor drives a rotating shaft to rotate, the rotating shaft drives the rolling wheel to rotate, one end of the workpiece pressed between the pressing block and the rolling wheel makes circular motion along with the rolling wheel, and the other end of the workpiece slides on a rotating roller on a U-shaped rail, so that the moving resistance of the workpiece is greatly reduced, the abrasion to a sliding rail is reduced, meanwhile, the height of the U-shaped rail can be adjusted, the workpiece with different models can be conveniently processed, and the workpiece is folded into a circle; the workpiece can be bent into a round shape, the stepping motor drives the winding wheel to rotate, so that the workpiece is bent into the round shape, manual bending is not needed, time and labor are saved, the bending efficiency is high, the workpiece rolls on the rotating roller on the U-shaped rail, and the abrasion of the workpiece to the sliding rail is reduced;

if the workpiece needs to be folded into a polygonal shape and only one part of the workpiece needs to be folded, the workpiece is inserted into a first U-shaped frame and a second U-shaped frame, a resistance reducing bearing on the first U-shaped frame and a resistance reducing bearing on the second U-shaped frame are located on one side of the workpiece, a pin rod is located on the other side of the workpiece, the positions of a distance adjusting plate and an angle adjusting rod are adjusted through a distance adjusting hole and an angle adjusting hole according to the distance of the folded edge and the angle of the folded edge, one end of the workpiece is abutted against the distance adjusting hole, a sleeve is rotated towards the direction of the abutted against the angle adjusting rod, and therefore the workpiece is bent and deformed by a bolt and the resistance reducing bearing on the second U-shaped frame until the sleeve is contacted with the angle adjusting rod, the folding operation is completed, and the steps are repeated, so that the next folding can be completed; the folding device has the advantages that the workpiece can be folded into a polygon, the folding length and the folding angle can be conveniently changed by arranging the distance adjusting plate and the angle adjusting rod, the use is convenient, the structure is simple, and the driving rod is sleeved by the sleeve, so that the aim of saving labor is fulfilled;

when the batch flanging operation is carried out, the second flanging device is used, the first lower die slides right below the first upper die, the distance between the two groups of limiting plates is adjusted according to the width of a workpiece, the workpiece is placed on the first lower die, the servo motor is started, the output end of the servo motor is started to drive the main belt pulley to rotate, the main belt pulley drives the auxiliary belt pulley to rotate through the belt, the auxiliary belt pulley drives the lead screw to rotate, so that the driving nut descends, the upper die extrudes the workpiece, the flanging is folded into the shape of the semicircular groove, if the flanging is required to be in other shapes, the corresponding second lower die, the corresponding third lower die and the corresponding fourth lower die can be adjusted right below the upper die, and the upper die is replaced by the corresponding dies; the servo motor drives the upper die to move downwards, the movement is stable, so that the extrusion force of the lower die is more uniform, the folded edge is more uniform and smooth, the lower dies with different shapes can be conveniently replaced, and the functionality is richer.

Drawings

Fig. 1 is a schematic structural diagram provided in embodiment 1 of the present invention;

fig. 2 is a schematic structural view of a second flanging device provided in embodiment 1 of the present invention;

FIG. 3 is a partial view of FIG. 2 provided in accordance with embodiment 1 of the present invention;

FIG. 4 is a top view of FIG. 3 provided in accordance with example 1 of the present invention;

FIG. 5 is a side view of FIG. 3 provided in accordance with example 1 of the present invention;

FIG. 6 is an enlarged view of the point B provided in example 1 of the present invention;

fig. 7 is a schematic structural view of a first flanging device provided in embodiment 1 of the present invention;

fig. 8 is a schematic structural view of a third folding device provided in embodiment 1 of the present invention;

fig. 9 is a top view of a third hemming device provided in embodiment 1 of the present invention;

fig. 10 is a schematic structural view of a first flanging device provided in embodiment 2 of the present invention.

In the figure: the device comprises a first flanging device 100, a second flanging device 200, a third flanging device 300, a support table 400, a stepping motor 101, a stabilizing column 102, a rotating shaft 103, a winding wheel 104, a pressing block 105, a sliding rail 106, a sliding groove 107, a placing groove 108, a U-shaped rail 109, a rotating roller 110, a servo motor 201, a driven belt pulley 202, a belt 203, a sleeve 204, a screw rod 205, a nut 206, a die seat 207, an upper die 208, a die rail 210, a first lower die 211, a limiting hole 213, a limiting plate 214, a semicircular groove 215, a rectangular sliding groove 216, a second lower die 217, a third lower die 218, a fourth lower die 219, a main belt pulley 220, a first U-shaped frame 301, a second U-shaped frame 302, a pin rod 303, a drag reduction bearing 304, a gasket 305, a sleeve 306, a driving rod 307, a distance adjusting plate 308, a distance adjusting hole 309, an angle adjusting hole 310, an angle adjusting rod 311 and a pin 312.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Example 1:

referring to fig. 1-9 in the specification, the polygonal bending machine of the embodiment comprises a first flanging device 100, a second flanging device 200, a third flanging device 300 and a supporting table 400;

further, the first flanging device 100 comprises a stepping motor 101, a stabilizing column 102, a rotating shaft 103, a rolling wheel 104, a pressing block 105, a sliding rail 106, a sliding groove 107, a placing groove 108, a U-shaped rail 109 and a rotating roller 110, specifically, the output end of the stepping motor 101 is fixedly connected with the rotating shaft 103, the outer wall of the left end of the rotating shaft 103 is sleeved with the rolling wheel 104, the pressing block 105 is fixedly installed on the outer wall of the rolling wheel 104, the sliding rail 106 is arranged below the rolling wheel 104, the sliding groove 107 is formed in the sliding rail 106, the pressing block 105 is connected with the rolling wheel 104 through a bolt, the bottom of the sliding rail 106 is fixedly installed on the supporting table 400, the outer wall of the rotating shaft 103 is fixedly connected with the stabilizing column 102 through a bearing, and the bottom of the stabilizing column 102 is fixedly installed on the supporting table 400; when the first flanging device 100 is used, a plate-shaped workpiece and a rod-shaped workpiece are folded into a circular shape, the model of a stepping motor 101 is set to be 20BYG250-33, the stepping motor 101 is used for driving a rolling wheel 104 to rotate, the rolling wheel 104 is used for driving the workpiece to do circular motion, so that the effect of folding into the circular shape is achieved, and the stabilizing column 102 is used for stabilizing the rotating shaft 103.

Further, the second flanging device 200 comprises a servo motor 201, a secondary pulley 202, a belt 203, a sleeve 204, a lead screw 205, a nut 206, a die holder 207, an upper die 208, a die rail 210, a first lower die 211, a limiting hole 213, a limiting plate 214, a semicircular groove 215, a rectangular sliding groove 216, a second lower die 217, a third lower die 218, a fourth lower die 219 and a primary pulley 220, specifically, the outer wall of the output end of the servo motor 201 is sleeved with two sets of primary pulleys 220, the primary pulleys 220 are in transmission connection with the belt 203, the belt 203 is in transmission connection with the secondary pulley 202, the inner wall of the secondary pulley 202 is sleeved with the lead screw 205, the sleeve 204 is wrapped outside the lead screw 205, two ends of the lead screw 205 are fixedly installed on the sleeve 204 through bearings, the outer wall of the lead screw 205 is in threaded connection with the nut 206, the outer wall of the nut 206 is fixedly connected with the die holder 207, the inner, a first lower die 211, a second lower die 217, a third lower die 218 and a fourth lower die 219 are arranged below the upper die 208, the first lower die 211 is positioned under the upper die 208, a semicircular groove 215 is formed in the first lower die 211, the bottoms of the first lower die 211, the second lower die 217, the third lower die 218 and the fourth lower die 219 are slidably connected with a die rail 210, a rectangular sliding groove 216 is formed in the top of the die rail 210, two sides of the first lower die 211, the second lower die 217, the third lower die 218 and the fourth lower die 219 are fixedly provided with a limiting plate 214 through bolts, the upper die 208 is fixed with the die base 207 through bolts, two sides of the first lower die 211, the second lower die 217, the third lower die 218 and the fourth lower die 219 are provided with limiting holes 213, a trapezoidal groove is formed in the second lower die 217, and elliptical grooves are formed in the third lower die 218 and the fourth lower die 219, the bottom of the sleeve 204 is fixedly connected with the supporting platform 400; the servo motor 201 is set to be JSF57-15-30-BF-1000, the servo motor 201 is used for driving the screw rod 205 to rotate so as to drive the nut 206 to move up and down, the sleeve 204 is used for covering the screw rod 205 and the nut 206 to increase safety, the die seat 207 is used for fixedly inserting the upper die 208 in an inserting mode so as to facilitate replacement of the upper die 208, the die rail 210 is used for supporting the first lower die 211, the second lower die 217, the third lower die 218 and the fourth lower die 219 are used for enabling the edge to be folded into different properties, and the rectangular sliding groove 216 is used for facilitating adjustment of any one of the first lower die 211, the second lower die 217, the third lower die 218 and the fourth lower die 219 to be right below the upper die 208.

Further, the third flanging device 300 comprises a first U-shaped frame 301, a second U-shaped frame 302, a pin rod 303, a drag reduction bearing 304, a spacer 305, a sleeve 306, a driving rod 307, a distance adjustment plate 308, a distance adjustment hole 309, a angle adjustment hole 310, an angle adjustment rod 311 and a bolt 312, specifically, the first U-shaped frame 301 and the second U-shaped frame 302 are movably connected through the pin rod 303, the bolt 312 is inserted into the inner wall of the first U-shaped frame 301 and the second U-shaped frame 302, the spacer 305 and the drag reduction bearing 304 are sleeved on the outer wall of the bolt 312, the spacer 305 is located on two sides of the drag reduction bearing 304, the driving rod 307 is fixedly connected to the right end of the second U-shaped frame 302, the driving rod 307 is in threaded connection with the sleeve 306, the distance adjustment plate 308 is arranged below the left side of the first U-shaped frame 301, the angle adjustment rod 311 is arranged below the second U-shaped frame 302, and bottoms of the distance adjustment plate 308 and the angle adjustment rod 311 are both connected with the supporting table 400 through bolts; the drag reduction bearing 304 is used for reducing resistance in the edge folding process and enabling edge folding to be more labor-saving, the angle adjusting rod 311 is matched with the angle adjusting hole 310 to play a role in adjusting the rotating angle of the sleeve 306, so that the edge folding angle is changed, and the distance adjusting plate 308 is matched with the distance adjusting hole 309 to play a role in adjusting the length of edge folding.

Further, the supporting table 400 is provided with an angle adjusting hole 309 and an angle adjusting hole 310.

The implementation scenario is specifically as follows: when the device is used, when a workpiece needs to be flanged into a round shape, one end of the workpiece is placed between the pressing block 105 and the rolling wheel 104, the screw is tightened to enable the pressing block 105 to press the workpiece tightly, the stepping motor 101 is started, the output end of the stepping motor 101 drives the rotating shaft 103 to rotate, the rotating shaft 103 drives the rolling wheel 104 to rotate, one end of the workpiece pressed between the pressing block 105 and the rolling wheel 104 makes circular motion along with the rolling wheel 104, and the other end of the workpiece slides in the sliding groove 107 on the sliding rail 106, so that the workpiece is flanged into a round shape; if the workpiece needs to be flanged into a polygonal shape, and only one part of the workpiece is flanged, the workpiece is inserted into the first U-shaped frame 301 and the second U-shaped frame 302, the drag reduction bearing 304 on the first U-shaped frame 301 and the drag reduction bearing 304 on the second U-shaped frame 302 are positioned on one side of the workpiece, the pin rod 303 is positioned on the other side of the workpiece, according to the distance of flanging and the angle of flanging, the positions of the distance adjusting plate 308 and the angle adjusting rod 311 are adjusted through the distance adjusting hole 309 and the angle adjusting hole 310, one end of the workpiece is abutted against the distance adjusting hole 309, the sleeve 306 is rotated towards the direction of abutting against the angle adjusting rod 311, so that the workpiece is bent and deformed by the bolt 312 and the drag reduction bearing 304 on the second U-shaped frame 302, the sleeve 306 is abutted against the angle adjusting rod 311, the flanging operation is completed, and the steps are repeated, and the; when batch flanging operation is carried out, the second flanging device 200 is used, the first lower die 211 slides under the first upper die 208, the distance between the two groups of limiting plates 214 is adjusted according to the width of a workpiece, the workpiece is placed on the first lower die 211, the servo motor 201 is started, the output end of the servo motor 201 is started to drive the main belt pulley 220 to rotate, the main belt pulley 220 drives the secondary belt pulley 202 to rotate through the belt 203, the secondary belt pulley 202 drives the screw rod 205 to rotate, the driving nut 206 descends, the upper die 208 extrudes the workpiece, the flanging is folded into the shape of the semicircular groove 215, if the flanging is required to be in other shapes, the corresponding second lower die 217, the third lower die 218 and the fourth lower die 219 can be adjusted under the upper die 208, and the upper die 208 is replaced by a corresponding die.

Example 2:

referring to the attached fig. 10 of the specification, the difference from the embodiment 1 is: the first flanging device 100 further comprises a U-shaped rail 109, a placing groove 108 and a rotating roller 110, the placing groove 108 is formed in the sliding rail 106, the U-shaped rail 109 is fixedly installed on the inner wall of the placing groove 108, and the rotating roller 110 is fixedly installed on the inner wall of the U-shaped rail 109;

the implementation scenario is specifically as follows:

compared with the embodiment 1, when the device is used, when the workpiece needs to be flanged into a round shape, one end of the workpiece is placed between the pressing block 105 and the winding wheel 104, the screw is tightened to enable the pressing block 105 to press the workpiece tightly, the stepping motor 101 is started, the output end of the stepping motor 101 drives the rotating shaft 103 to rotate, the rotating shaft 103 drives the winding wheel 104 to rotate, one end of the workpiece pressed between the pressing block 105 and the winding wheel 104 makes circular motion along with the winding wheel 104, and the other end of the workpiece slides on the rotating roller 110 on the U-shaped rail 109, so that the moving resistance of the workpiece is greatly reduced, the abrasion on the sliding rail 106 is reduced, meanwhile, the height of the U-shaped rail 109 can be adjusted, the workpiece with different models can be conveniently machined, and the workpiece is flanged into a round shape; if the workpiece needs to be flanged into a polygonal shape, and only one part of the workpiece is flanged, the workpiece is inserted into the first U-shaped frame 301 and the second U-shaped frame 302, the drag reduction bearing 304 on the first U-shaped frame 301 and the drag reduction bearing 304 on the second U-shaped frame 302 are positioned on one side of the workpiece, the pin rod 303 is positioned on the other side of the workpiece, according to the distance of flanging and the angle of flanging, the positions of the distance adjusting plate 308 and the angle adjusting rod 311 are adjusted through the distance adjusting hole 309 and the angle adjusting hole 310, one end of the workpiece is abutted against the distance adjusting hole 309, the sleeve 306 is rotated towards the direction of abutting against the angle adjusting rod 311, so that the workpiece is bent and deformed by the bolt 312 and the drag reduction bearing 304 on the second U-shaped frame 302, the sleeve 306 is abutted against the angle adjusting rod 311, the flanging operation is completed, and the steps are repeated, and the; when batch flanging operation is carried out, the second flanging device 200 is used, the first lower die 211 slides under the first upper die 208, the distance between the two groups of limiting plates 214 is adjusted according to the width of a workpiece, the workpiece is placed on the first lower die 211, the servo motor 201 is started, the output end of the servo motor 201 is started to drive the main belt pulley 220 to rotate, the main belt pulley 220 drives the secondary belt pulley 202 to rotate through the belt 203, the secondary belt pulley 202 drives the screw rod 205 to rotate, the driving nut 206 descends, the upper die 208 extrudes the workpiece, the flanging is folded into the shape of the semicircular groove 215, if the flanging is required to be in other shapes, the corresponding second lower die 217, the third lower die 218 and the fourth lower die 219 can be adjusted under the upper die 208, and the upper die 208 is replaced by a corresponding die.

The above description is only a preferred embodiment of the present invention, and any person skilled in the art may modify the present invention or modify it into an equivalent technical solution by using the technical solution described above. Therefore, any simple modifications or equivalent substitutions made in accordance with the technical solution of the present invention are within the scope of the claims of the present invention.

Claims

1. The utility model provides a multilateral bender, includes brace table (400), hem device one (100), hem device two (200) and hem device three (300), its characterized in that: the first flanging device (100), the second flanging device (200) and the third flanging device (300) are fixedly arranged on the supporting table (400), the first flanging device (100) is positioned on the left side of the second flanging device (200), and the third flanging device (300) is positioned on the right side of the second flanging device (200);

the first flanging device (100) comprises a stepping motor (101), the output end of the stepping motor (101) is fixedly connected with a rotating shaft (103), the outer wall of the left end of the rotating shaft (103) is sleeved with a rolling wheel (104), a pressing block (105) is fixedly installed on the outer wall of the rolling wheel (104), a sliding rail (106) is arranged below the rolling wheel (104), and a sliding groove (107) is formed in the sliding rail (106);

the second flanging device (200) comprises a servo motor (201), the outer wall of the output end of the servo motor (201) is sleeved with two sets of main belt pulleys (220), the main belt pulleys (220) are in transmission connection with a belt pulley (202), the inner wall of the belt pulley (202) is sleeved with a screw rod (205), the outer side of the screw rod (205) is wrapped by a sleeve (204), two ends of the screw rod (205) are fixedly installed on the sleeve (204) through bearings, the outer wall of the screw rod (205) is in threaded connection with a nut (206), the outer wall of the nut (206) is fixedly connected with a die base (207), the inner wall of the bottom of the die base (207) is inserted into an upper die (208), a first lower die (211), a second lower die (217), a third lower die (218) and a fourth lower die (219) are arranged below the upper die (208), a semicircular groove (215) is formed in the first lower die (211), the bottoms of the first lower die (211), the second lower die (217), the third lower die (218) and the fourth lower die (219) are connected with a die rail (210) in a sliding mode, a rectangular sliding groove (216) is formed in the top of the die rail (210), and limiting plates (214) are fixedly mounted on two sides of the first lower die (211), the second lower die (217), the third lower die (218) and the fourth lower die (219) through bolts;

hem device three (300) is including U-shaped frame one (301), U-shaped frame two (302) and pin pole (303), U-shaped frame one (301) and U-shaped frame two (302) pass through pin pole (303) swing joint, U-shaped frame one (301) and U-shaped frame two (302) inner wall grafting bolt (312), bolt (312) outer wall cup joints gasket (305) and drag reduction bearing (304), gasket (305) are located drag reduction bearing (304) both sides, U-shaped frame two (302) right-hand member fixed connection actuating lever (307), actuating lever (307) right-hand member threaded connection sleeve pipe (306), U-shaped frame one (301) left side below is equipped with roll adjustment board (308), U-shaped frame two (302) below is equipped with roll adjustment pole (311).

2. Polygonal bending machine according to claim 1, characterized in that: the pressing block (105) is connected with the rolling wheel (104) through a bolt, and the bottom of the sliding rail (106) is fixedly installed on the supporting platform (400).

3. Polygonal bending machine according to claim 1, characterized in that: the outer wall of the rotating shaft (103) is fixedly connected with a stabilizing column (102) through a bearing, and the bottom of the stabilizing column (102) is fixedly installed on the supporting table (400).

4. Polygonal bending machine according to claim 1, characterized in that: the upper die (208) is fixed with the die base (207) through a bolt, and limiting holes (213) are formed in two sides of the first lower die (211), the second lower die (217), the third lower die (218) and the fourth lower die (219).

5. Polygonal bending machine according to claim 1, characterized in that: a trapezoidal groove is formed in the second lower die (217), elliptical grooves are formed in the third lower die (218) and the fourth lower die (219), and the bottom of the sleeve (204) is fixedly connected with the supporting table (400).

6. Polygonal bending machine according to claim 1, characterized in that: the bottoms of the distance adjusting plate (308) and the angle adjusting rod (311) are connected with the supporting platform (400) through bolts.

7. Polygonal bending machine according to claim 1, characterized in that: the support table (400) is provided with a distance adjusting hole (309) and an angle adjusting hole (310).

8. Polygonal bending machine according to claim 1, characterized in that: the first flanging device (100) further comprises a U-shaped rail (109), a placing groove (108) and a rotating roller (110), the placing groove (108) is formed in the sliding rail (106), the U-shaped rail (109) is fixedly installed on the inner wall of the placing groove (108), and the rotating roller (110) is fixedly installed on the inner wall of the U-shaped rail (109).