Automatic production line for edge strips

Abstract

The invention discloses an automatic production line for hemming strips, comprising a punching machine and a shaping machine; the punching machine comprises a first frame, a first punching die, a second punching die and a third punching die; the shaping machine comprises a second frame, a first shaping mechanism, a second shaping mechanism and a third shaping mechanism; a folding opening is punched out of a steel strip by the first punching die, so that the steel strip is conveniently bent from the folding opening; an interface is punched out of the steel strip by the second punching die, so that the first connection of the steel strip is convenient; the steel strip is cut into a specified length by the third punching die; and two folded edges are shaped into a right angle by the first shaping mechanism, and the two folded edges are shaped into a right angle by the second shaping mechanism, and finally the steel strip is finally shaped into an hemming strip by the third shaping mechanism, thereby realizing the automation of punching and shaping and greatly improving the production efficiency.

Description

Technical Field

[0001] The invention relates to the field of edge strip equipment technology, in particular to an automatic edge strip production line. Background Art

[0002] Mica heating film is made of Pamica ® The integral heating element made of high-quality high-temperature resistant mica paper and alloy heating film with a special pressing process is safe, environmentally friendly, lightweight, durable, efficient and energy-saving. It is an alternative material to oil-filled heaters, electric heating wires, quartz tubes, halogen tubes, etc.

[0003] The existing mica electric heating film will be edged, that is, the edge of the mica electric heating film is edged with edge strips. However, the existing edge strip production adopts manual production or semi-automatic production, which has low production efficiency and high cost, and is not conducive to the development of automation trend. Summary of the invention

[0004] In view of this, the present invention aims at the deficiencies in the prior art, and its main purpose is to provide an automatic production line for edge strips, which effectively solves the existing problems of low productivity and high cost, which are not conducive to the development of the automation trend.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An automatic production line for hemming strips includes a punching machine and a shaping machine connected to the output end of the punching machine; the punching machine includes a first frame, a first punching die for punching a folding opening of a straight steel strip, a second punching die for punching an interface of the straight steel strip, and a third punching die for cutting the straight steel strip; the first punching die, the second punching die and the third punching die are all arranged on the first frame and are arranged in sequence along the output direction of the steel strip; the shaping machine is located on the side of the output end of the punching machine, and the shaping machine includes a second machine The invention relates to a machine frame, a first shaping mechanism for shaping the straight steel strip into two folded edges, a second shaping mechanism cooperating with the first shaping mechanism to straighten the two folded edges, and a third shaping mechanism for finally shaping the steel strip; the second frame is provided with a track for conveying the steel strip, and the input end of the track is connected to the output end of the punching and shearing machine; the first shaping mechanism, the second shaping mechanism and the third shaping mechanism are all arranged on the second frame, and the first shaping mechanism, the second shaping mechanism and the third shaping mechanism are arranged in sequence along the conveying direction of the track.

[0007] As a preferred embodiment, the first punching die includes a mounting frame, a lower die, a hydraulic cylinder, an upper die and two punching blocks for punching out folds in the steel strip; the mounting frame is fixed on the first frame; the lower die is mounted on the mounting frame, and the front and rear sides of the lower die are penetrated by aisles for the steel strip to pass through, and the upper and lower surfaces of the lower die are penetrated by two spaced punching holes, and the two punching holes each have a V-shaped punching opening passing through both sides of the aisle; the hydraulic cylinder is mounted on the mounting frame; the upper die is arranged on the output shaft of the hydraulic cylinder, and the hydraulic cylinder drives the upper die to move up and down just above the lower die; the two punching blocks are spaced apart on the bottom surface of the upper die and move up and down with the upper die in the corresponding punching holes, and the two punching blocks each have a V-shaped punching portion that matches the V-shaped punching opening.

[0008] As a preferred solution, there are three first punching and cutting dies, which are arranged on the first frame at intervals in sequence along the conveying direction of the steel strip.

[0009] As a preferred solution, the second punching die includes a mounting frame, a lower die, a hydraulic cylinder, an upper die and two punching blocks for punching out the interface of the steel strip; the mounting frame is fixed on the first frame; the lower die is mounted on the mounting frame, and the front and rear sides of the lower die are penetrated by aisles for the steel strip to pass through, and the upper and lower surfaces of the lower die are penetrated by two spaced punching holes, and the two punching holes each have a trapezoidal punching opening passing through both sides of the aisle; the hydraulic cylinder is mounted on the mounting frame; the upper die is arranged on the output shaft of the hydraulic cylinder, and the hydraulic cylinder drives the upper die to move up and down just above the lower die; the two punching blocks are spaced apart on the bottom surface of the upper die and move up and down with the upper die in the corresponding punching holes, and the two punching blocks each have a trapezoidal punching portion adapted to the trapezoidal punching opening.

[0010] As a preferred solution, the third punching die includes a mounting frame, a lower die, a hydraulic cylinder, an upper die and a punching block for cutting the steel strip; the mounting frame is fixed on the first frame; the lower die is mounted on the mounting frame, and the front and rear sides of the lower die are penetrated by a passage for the steel strip to pass through; the hydraulic cylinder is mounted on the mounting frame; the upper die is arranged on the output shaft of the hydraulic cylinder, and the hydraulic cylinder drives the upper die to move up and down above the lower die; the punching block is arranged on the bottom surface of the upper die and moves up and down with the upper die behind the passage, and the lower end of the punching block has a blade portion for cutting the steel strip.

[0011] As a preferred solution, a mounting frame and a track plate are provided on the second frame; the mounting frame is fixed to the top surface of the second frame, and the first shaping mechanism is provided on the mounting frame; the track plate is provided on the side of the mounting frame, the track is located on the top surface of the track plate, and the second shaping mechanism and the third shaping mechanism are located on the track plate.

[0012] As a preferred solution, the first shaping mechanism includes a motor, seven groups of lower straight roller units and seven groups of upper straight roller units; the motor is fixed on the second frame; the seven groups of lower straight roller units are arranged at intervals on the mounting frame, each lower straight roller unit includes a lower rotating shaft, a lower gear and a lower pressure wheel, the lower rotating shaft is rotatably arranged on the mounting frame, one of the lower rotating shafts is connected to the output shaft of the above-mentioned motor; the lower gear is arranged on the lower rotating shaft, and two adjacent lower gears are meshed through a connecting gear, the connecting gear is arranged on a connecting shaft, and the connecting shaft is rotatably arranged on the mounting frame. The mounting frame is provided with a plurality of mounting notches at intervals on the track plate, and the lower pressure wheel is mounted on the lower rotating shaft and is located in the mounting notches; the seven groups of upper straight roller units are arranged at intervals on the mounting frame and are respectively opposite to the seven groups of lower straight roller units up and down, and each upper straight roller unit includes an upper rotating shaft, an upper gear and an upper pressure wheel, and the upper rotating shaft is rotatably arranged on the mounting frame; the upper gear is arranged on the upper rotating shaft, and the upper gear is meshed with the corresponding lower gear; the upper pressure wheel is mounted on the upper rotating shaft and is opposite to the corresponding lower pressure wheel up and down, and the steel belt passes between the upper pressure wheel and the lower pressure wheel.

[0013] As a preferred solution, the surface of the lower pressing wheel is concavely provided with an annular groove for the steel strip to pass through, and correspondingly, the surface of the upper pressing wheel is convexly provided with an annular convex portion for flattening the steel strip, and the annular convex portion extends into the annular groove.

[0014] As a preferred solution, the second shaping mechanism includes two side pressure wheels, which are rotatably mounted on the track plate through bearing seats and are located on the outer side surfaces of the two upper pressure wheels at the rear end. The two side pressure wheels cooperate with the corresponding two upper pressure wheels to perform the second shaping on the steel belt.

[0015] As a preferred solution, a control panel is provided on the second frame, and the punching machine and shaping machine are both electrically connected to the control panel.

[0016] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0017] The first punching die is used to punch out a folding opening on the steel strip, so that the steel strip can be bent from the folding opening; the second punching die is used to punch out an interface on the steel strip, so that the first connection of the steel strip is convenient; the third punching die is used to cut the steel strip into a specified length; and the first shaping mechanism is used to shape two folded edges on the steel strip, and then the two folded edges are shaped into a right angle by the second shaping mechanism, and finally the third shaping mechanism is used to finally shape the steel strip into an edge strip, thereby realizing the automation of punching and shaping and greatly improving the production efficiency.

[0018] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a stereogram of a preferred embodiment of the present invention;

[0020] Figure 2 is a three-dimensional diagram of a first punching die in a preferred embodiment of the present invention;

[0021] Figure 3 It is a three-dimensional diagram of a punching block on a first punching die in a preferred embodiment of the present invention;

[0022] Figure 4 It is a three-dimensional diagram of the lower die on the first punching die in a preferred embodiment of the present invention;

[0023] Figure 5 is a three-dimensional diagram of a second punching die in a preferred embodiment of the present invention;

[0024] Figure 6 It is a three-dimensional diagram of the punching block on the second punching die in the preferred embodiment of the present invention;

[0025] Figure 7 is a three-dimensional diagram of the lower die on the second punching die in a preferred embodiment of the present invention;

[0026] Figure 8 is a three-dimensional diagram of a third punching die in a preferred embodiment of the present invention;

[0027] Fig. 9 is a three-dimensional diagram of a shaping machine in a preferred embodiment of the present invention;

[0028] Fig.10 It is another perspective view of the shaping machine in the preferred embodiment of the present invention;

[0029] Fig.11 yes Fig.10 A partial enlarged view of the middle A;

[0030] Fig.12 is a three-dimensional diagram of the first shaping mechanism in a preferred embodiment of the present invention;

[0031] Fig.13 is a three-dimensional diagram of the lower pressing wheel in a preferred embodiment of the present invention;

[0032] Fig.14 is a three-dimensional diagram of the upper pressing wheel in a preferred embodiment of the present invention;

[0033] Fig.15 It is a schematic diagram of the steel strip being shaped into an edge strip.

[0034] Description of the accompanying drawings:

[0035] 10. Punching machine 11. First frame

[0036] 12. First punching die 121. Mounting frame

[0037] 122, lower mold 1221, aisle

[0038] 1222, punching hole 1223, V-shaped punching notch

[0039] 123. Hydraulic cylinder 124. Upper die

[0040] 125. Punching block 1251. V-shaped punching part

[0041] 13. Second punching die 131. Mounting frame

[0042] 132, lower mold 1321, aisle

[0043] 1322, punching hole 1323, trapezoidal punching opening

[0044] 133. Hydraulic cylinder 134. Upper die

[0045] 135. Punching block 1351. Trapezoidal punching portion

[0046] 14. The third punching die 141. Mounting frame

[0047] 142, lower mold 1421, aisle

[0048] 143. Hydraulic cylinder 144. Upper die

[0049] 145. Punching block 1451. Blade

[0050] 20. Shaping machine 21. Second rack

[0051] 22. First shaping mechanism 221. Motor

[0052] 222, lower shaft 223, lower gear

[0053] 224, lower pressing wheel 2241, arc-shaped annular groove

[0054] 225, connecting gear 226, connecting shaft

[0055] 227, upper shaft 228, upper gear

[0056] 229, upper pressing wheel 2291, arc-shaped annular convex portion

[0057] 23. Second shaping mechanism 231. Side pressing wheel

[0058] 24. Third shaping mechanism 241. Shaping roller

[0059] 25. Mounting frame 26. Track plate

[0060] 261, installation gap 30, control panel

[0061] 40. Steel belt 41. Folding edge

[0062] 43. Fold the edge. DETAILED DESCRIPTION

[0063] Please refer to Figures 1 to 14 As shown, it shows the specific structure of a preferred embodiment of the present invention, including a punching machine 10 and a shaping machine 20 connected to the output end of the punching machine.

[0064] The punching machine 10 includes a first frame 11, a first punching die 12 for punching out a fold in the steel strip, a second punching die 13 for punching out an interface in the steel strip, and a third punching die 14 for cutting the steel strip; the first punching die 12, the second punching die 13 and the third punching die 14 are all arranged on the first frame 11 and are arranged in sequence along the output direction of the steel strip. Of course, the punching machine 10 also includes a conveying mechanism (not shown) for conveying the steel strip.

[0065] The first punching die 12 includes a mounting frame 121, a lower die 122, a hydraulic cylinder 123, an upper die 124, and two punching blocks 125 for punching out folds in the steel strip. The mounting frame 121 is fixed on the first frame 11. The lower die 122 is mounted on the mounting frame 121, and the front and rear sides of the lower die 122 are penetrated with a passage 1221 for the steel strip to pass through, and the upper and lower surfaces of the lower die 122 are penetrated with two punching holes 1222 arranged at intervals, and the two punching holes 1222 each have a V-shaped punching opening 1223 passing through both sides of the passage. The hydraulic cylinder 123 is mounted on the mounting frame 121. The upper die 124 is arranged on the output shaft of the hydraulic cylinder 123, and the hydraulic cylinder 123 drives the upper die 124 to move up and down directly above the lower die 122. The two punching blocks 125 are arranged at intervals on the bottom surface of the upper die 124 and move up and down with the upper die 124 in the corresponding punching holes 1222. Both punching blocks 125 have a V-shaped punching portion 1251 that matches the V-shaped punching opening. The V-shaped punching portion 1251 presses down on the V-shaped punching opening 1223 to punch out V-shaped notches on both sides of the steel strip, thereby facilitating the subsequent bending of the steel strip from the V-shaped notches. In this embodiment, there are three first punching dies 12, which are arranged at intervals on the first frame 11 in sequence along the conveying direction of the steel strip. Because the steel strip needs to be folded into a frame later, it needs to be bent three times, so the three first punching dies 12 punch the steel strip respectively.

[0066] The second punching die 13 includes a mounting frame 131, a lower die 132, a hydraulic cylinder 133, an upper die 134, and two punching blocks 135 for punching and punching the steel strip to form an interface. The mounting frame 131 is fixed on the first frame 11. The lower die 132 is mounted on the mounting frame 131, and the front and rear sides of the lower die 132 are penetrated with a passage 1321 for the steel strip to pass through, and the upper and lower surfaces of the lower die 132 are penetrated with two punching holes 1322 arranged at intervals, and the two punching holes 1322 each have a trapezoidal punching opening 1323 passing through both sides of the passage. The hydraulic cylinder 133 is mounted on the mounting frame 131. The upper die 134 is arranged on the output shaft of the hydraulic cylinder 133, and the hydraulic cylinder 133 drives the upper die 134 to move back and forth up and down directly above the lower die 132. The two punching blocks 135 are spaced apart on the bottom surface of the upper die 134 and move up and down in the corresponding punching holes 1322 along with the upper die 134. Both punching blocks 135 have a trapezoidal punching portion 1351 that matches the trapezoidal punching opening. After the steel strip is subsequently bent three times, it needs to be connected end to end. The trapezoidal punching portion 1351 punches out an interface to facilitate the connection of the end to end of the steel strip.

[0067] The third punching die 14 includes a mounting frame 141, a lower die 142, a hydraulic cylinder 143, an upper die 144, and a punching block 145 for cutting the steel strip. The mounting frame 141 is fixed on the first frame 11. The lower die 142 is mounted on the mounting frame 141, and the front and rear sides of the lower die 142 are penetrated by a passage 1421 for the steel strip to pass through. The hydraulic cylinder 143 is mounted on the mounting frame 141. The upper die 144 is arranged on the output shaft of the hydraulic cylinder 143, and the hydraulic cylinder 143 drives the upper die 144 to move up and down above the lower die 142. The punching block 145 is arranged on the bottom surface of the upper die 144 and moves up and down behind the passage 1421 with the upper die 144. The lower end of the punching block 145 has a blade 1451 for cutting the steel strip, and the blade 1451 cuts the steel strip into sections according to the specified length.

[0068] The shaping machine 20 is located beside the output end of the punching machine 10, and includes a second frame 21, a first shaping mechanism 22 for shaping the straight steel strip into two folded edges, a second shaping mechanism 23 for straightening the two folded edges in cooperation with the first shaping mechanism, and a third shaping mechanism 24 for finally shaping the steel strip. The second frame 20 has a track 201 for conveying the steel strip, the input end of the track 201 is connected to the output end of the punching machine 10, the first shaping mechanism 22, the second shaping mechanism 23 and the third shaping mechanism 24 are all arranged on the second frame 21, and the first shaping mechanism 22, the second shaping mechanism 23 and the third shaping mechanism 24 are arranged in sequence along the conveying direction of the track.

[0069] The second frame 21 is provided with a mounting frame 25 and a track plate 26. The mounting frame 25 is fixed to the top surface of the second frame 21, and the first shaping mechanism 22 is provided on the mounting frame 25. The track plate 26 is provided on the side of the mounting frame 25, the track 201 is located on the top surface of the track plate 26, and the second shaping mechanism 23 and the third shaping mechanism 24 are located on the track plate 26.

[0070] The first shaping mechanism 22 includes a motor 221, seven groups of lower straight roller units and seven groups of upper straight roller units. The motor 221 is fixed on the second frame 21. The seven groups of lower straight roller units are arranged on the mounting frame 25 at intervals, and each lower straight roller unit includes a lower rotating shaft 222, a lower gear 223 and a lower pressing wheel 224. The lower rotating shaft 222 is rotatably arranged on the mounting frame 25, and one of the lower rotating shafts 222 is connected to the output shaft of the motor 221, thereby driving the lower straight roller unit to rotate. The lower gear 223 is arranged on the lower rotating shaft 222, and two adjacent lower gears 223 are meshed through a connecting gear 225, thereby driving the rotation in sequence. The connecting gear 225 is arranged on a connecting shaft 226, and the connecting shaft 226 is rotatably arranged on the mounting frame 25. The track plate 26 is provided with a plurality of installation notches 261 at intervals. The lower pressing wheel 224 is installed on the lower rotating shaft 222 and is located in the installation notches 261 .

[0071] The seven groups of upper straight roller units are arranged at intervals on the mounting frame 25 and face each other vertically with the seven groups of lower straight roller units. Each upper straight roller unit includes an upper rotating shaft 227, an upper gear 228 and an upper pressing wheel 229. The upper rotating shaft 227 is rotatably arranged on the mounting frame 25. The upper gear 228 is arranged on the upper rotating shaft 227, and the upper gear 228 is meshed with the corresponding lower gear 223, so that the lower straight roller unit drives the upper straight roller unit to rotate. The upper pressing wheel 229 is installed on the upper rotating shaft 227 and faces the corresponding lower pressing wheel 224 vertically. The steel belt passes between the upper pressing wheel 229 and the lower pressing wheel 224, and the upper pressing wheel 229 and the lower pressing wheel 224 shape the straight steel belt into two folded edges. The motor 221 drives one group of lower straight rolling wheel units to rotate, and the lower straight rolling wheel unit drives the remaining lower straight rolling wheel units to rotate through the connecting teeth 225, and at the same time, the lower straight rolling wheel unit drives the corresponding upper straight rolling wheel unit to rotate, and multiple groups of upper straight rolling wheel units and lower straight rolling wheel units cooperate to shape the two folded edges on the straight steel strip. The surface of the lower pressing wheel 224 is concavely provided with an arc-shaped annular groove 2241 for the steel strip to pass through, and correspondingly, the surface of the upper pressing wheel 229 is convexly provided with an arc-shaped annular protrusion 2291 for flattening the steel strip, and the arc-shaped annular protrusion 2291 extends into the arc-shaped annular groove 2241. After the straight steel strip enters the arc-shaped annular groove 2241, the arc-shaped annular protrusion 2291 shapes the two folded edges.

[0072] The second shaping mechanism 23 includes two sets of edge pressing wheels 231, which are rotatably mounted on the track plate 26 through bearing seats and are located beside the outer side surfaces of the two upper pressing wheels 229 at the rear end. The edge pressing wheels 231 are close to the upper pressing wheels 229, and the folded edges on the steel strip pass between them. The two sets of edge pressing wheels 231 cooperate with the corresponding two upper pressing wheels 229 to perform the second shaping on the steel strip. After the first shaping of the folded edges of the steel strip, the two folded edges are shaped into right angles by the edge pressing wheels 231 on both sides.

[0073] The third shaping mechanism 24 is composed of two rows of shaping rollers 241 arranged at intervals, and the steel strip passes through the two rows of shaping rollers 241 for final shaping. A control panel 30 is provided on the second frame 21, and the punching machine 10 and the shaping machine 20 are both electrically connected to the control panel 30.

[0074] The working principle of this embodiment is described in detail as follows:

[0075] like Fig.15 FIG. 4 is a schematic diagram showing a steel strip 41 becoming an edge strip 43 .

[0076] The unshaped steel strip 41 is passed through the aisles of the first punching die 12, the second punching die 13 and the third punching die 14 in turn, and the equipment is started. After the steel strip 41 is transported to a specified length, the first punching die 12, the second punching die 13 and the third punching die 14 work simultaneously, and the V-shaped punching part 1251 punches out a V-shaped fold 401 at a specified position of the steel strip 41, so as to facilitate a 90-degree bend from the V-shaped fold; the trapezoidal punching part 1351 punches out a trapezoidal interface 402 at a specified position of the steel strip 41, so as to facilitate the connection of the head and tail of the steel strip; the blade part 1451 cuts the steel strip 41. After the steel strip 41 is punched, the first punching die 12, the second punching die 13 and the third punching die 14 are reset, and the steel strip 41 is conveyed to the shaping machine 20, and the steel strip 41 enters the arc-shaped annular groove 2241 along the track 201. After the steel strip 41 enters the arc-shaped annular groove 2241, the arc-shaped annular protrusion 2291 rotates to shape the two sides of the steel strip 41 into two folded edges 42, that is, the shape of the steel strip at this time is adapted to the shape of the arc-shaped annular groove 2241. When the steel strip 41 enters the last two groups of the first shaping mechanisms 22, the two groups of edge pressing wheels 231 on the second shaping mechanism 23 cooperate with the upper pressing wheel 229 to perform the second shaping on the steel strip. After the first shaping, the steel strip with the folded edge 42 is shaped into a right angle to form an edging strip 43 by the edge pressing wheels 231 on both sides. Finally, the edging strip 43 is finally shaped by the third shaping mechanism 24 and then conveyed out. Subsequently, the edging strip is bent and connected to form an edging strip frame 44.

[0077] The design focus of the present invention is: a folding opening is punched out of the steel strip by a first punching die, so that the steel strip can be bent from the folding opening; an interface is punched out of the steel strip by a second punching die, so that the first connection of the steel strip can be facilitated; the steel strip is cut into a specified length by a third punching die; and two folded edges are formed on the steel strip by a first shaping mechanism, and then the two folded edges are shaped into a right angle by a second shaping mechanism, and finally the steel strip is finally shaped into a edging strip by a third shaping mechanism, thereby realizing the automation of punching and shaping and greatly improving production efficiency.

[0078] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An automatic production line for edge strips, characterized by: The invention comprises a punching machine and a shaping machine connected to the output end of the punching machine; the punching machine comprises a first frame, a first punching die for punching out a folding opening of a straight steel strip, a second punching die for punching out an interface of the straight steel strip, and a third punching die for cutting the straight steel strip; the first punching die, the second punching die and the third punching die are all arranged on the first frame and are arranged in sequence along the output direction of the steel strip; the shaping machine is located on the side of the output end of the punching machine, and the shaping machine comprises a second frame, a first punching die for punching out a folding opening of the ... A first shaping mechanism for shaping the plate steel strip into two folded edges, a second shaping mechanism for cooperating with the first shaping mechanism to straighten the two folded edges, and a third shaping mechanism for finally shaping the steel strip; the second frame is provided with a track for conveying the steel strip, and the input end of the track is connected to the output end of the punching and shearing machine; the first shaping mechanism, the second shaping mechanism and the third shaping mechanism are all arranged on the second frame, and the first shaping mechanism, the second shaping mechanism and the third shaping mechanism are arranged in sequence along the conveying direction of the track; The first punching die comprises a first mounting frame, a first lower die, a first hydraulic cylinder, a first upper die and two first punching blocks for punching out folds in the steel strip; the first mounting frame is fixed on the first frame; the first lower die is mounted on the first mounting frame, and the front and rear sides of the first lower die are penetrated with a first passage for the steel strip to pass through, and the upper and lower surfaces of the first lower die are penetrated with two first punching holes arranged at intervals, and the two first punching holes each have a V-shaped punching opening passing through both sides of the first passage; the first hydraulic cylinder is mounted on the first mounting frame; the first upper die is arranged on the output shaft of the first hydraulic cylinder, and the first hydraulic cylinder drives the first upper die to move up and down just above the first lower die; the two first punching blocks are spaced apart on the bottom surface of the first upper die and move up and down in the corresponding first punching holes with the first upper die, and the two first punching blocks each have a V-shaped punching portion adapted to the V-shaped punching opening; The second punching die comprises a second mounting frame, a second lower die, a second hydraulic cylinder, a second upper die and two second punching blocks for punching out the interface of the steel strip; the second mounting frame is fixed on the first frame; the second lower die is mounted on the second mounting frame, and the front and rear sides of the second lower die are penetrated by a second passage for the steel strip to pass through, and the upper and lower surfaces of the second lower die are penetrated by two second punching holes arranged at intervals, and the two second punching holes each have a trapezoidal punching opening passing through both sides of the second passage; the second hydraulic cylinder is mounted on the second mounting frame; the second upper die is arranged on the output shaft of the second hydraulic cylinder, and the second hydraulic cylinder drives the second upper die to move up and down just above the second lower die; the two second punching blocks are spaced apart on the bottom surface of the second upper die and move up and down in the corresponding second punching holes with the second upper die, and the two second punching blocks each have a trapezoidal punching portion adapted to the trapezoidal punching opening.

2. The automatic production line for edge banding according to claim 1 is characterized in that: There are three first punching and cutting dies, which are arranged on the first frame at intervals in sequence along the conveying direction of the steel strip.

3. The automatic production line for edge banding according to claim 1 is characterized in that: The third punching die includes a third mounting frame, a third lower die, a third hydraulic cylinder, a third upper die and a third punching block for cutting the steel strip; the third mounting frame is fixed to the first frame; the third lower die is mounted on the third mounting frame, and the front and rear sides of the third lower die are penetrated by a third passage for the steel strip to pass through; the third hydraulic cylinder is mounted on the third mounting frame; the third upper die is arranged on the output shaft of the third hydraulic cylinder, and the third hydraulic cylinder drives the third upper die to move up and down above the third lower die; the third punching block is arranged on the bottom surface of the third upper die and moves up and down with the third upper die behind the third passage, and the lower end of the third punching block has a blade portion for cutting the steel strip.

4. The automatic production line for edge banding according to claim 1 is characterized in that: The second frame is provided with a mounting frame and a track plate; the mounting frame is fixed to the top surface of the second frame, and the first shaping mechanism is provided on the mounting frame; the track plate is provided on the side of the mounting frame, the track is located on the top surface of the track plate, and the second shaping mechanism and the third shaping mechanism are located on the track plate.

5. The automatic production line for edge banding according to claim 4 is characterized in that: The first shaping mechanism includes a motor, seven groups of lower straight roller units and seven groups of upper straight roller units; the motor is fixed on the second frame; the seven groups of lower straight roller units are arranged at intervals on the mounting frame, each lower straight roller unit includes a lower rotating shaft, a lower gear and a lower pressure wheel, the lower rotating shaft is rotatably arranged on the mounting frame, one of the lower rotating shafts is connected to the output shaft of the above-mentioned motor; the lower gear is arranged on the lower rotating shaft, and two adjacent lower gears are meshed through a connecting gear, the connecting gear is arranged on a connecting shaft, and the connecting shaft is rotatably arranged on the mounting frame; the upper The track plate is provided with a plurality of installation notches at intervals, and the lower pressure wheel is installed on the lower rotating shaft and is located in the installation notches; the seven groups of upper straight roller units are arranged at intervals on the mounting frame and are respectively opposite to the seven groups of lower straight roller units up and down, each upper straight roller unit includes an upper rotating shaft, an upper gear and an upper pressure wheel, and the upper rotating shaft is rotatably arranged on the mounting frame; the upper gear is arranged on the upper rotating shaft, and the upper gear is meshed with the corresponding lower gear; the upper pressure wheel is installed on the upper rotating shaft and is opposite to the corresponding lower pressure wheel up and down, and the steel belt passes between the upper pressure wheel and the lower pressure wheel.

6. The automatic production line for edge banding according to claim 5, characterized in that: The surface of the lower pressing wheel is concavely provided with an arc-shaped annular groove for the steel strip to pass through. Correspondingly, the surface of the upper pressing wheel is convexly provided with an arc-shaped annular convex portion for flattening the steel strip. The arc-shaped annular convex portion extends into the arc-shaped annular groove to shape the straight steel strip into two folded edges.

7. The automatic production line for edge banding according to claim 6, characterized in that: The second shaping mechanism includes two sets of edge pressing wheels, which are rotatably mounted on the track plate through bearing seats and are located on the side sides of the two upper pressing wheels at the rear end. The two sets of edge pressing wheels cooperate with the corresponding two upper pressing wheels to straighten the folded edges on the steel belt.

8. The automatic production line for edge banding according to claim 1 is characterized in that: The second frame is provided with a control panel, and the punching machine and the shaping machine are both electrically connected to the control panel.

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