CN112517692A

CN112517692A - Metal bending and cutting method

Info

Publication number: CN112517692A
Application number: CN202011283759.7A
Authority: CN
Inventors: 张君
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-03-19

Abstract

The invention relates to the technical field of metal bending, and discloses a metal bending method, which is based on metal bending cutting equipment and comprises a rack, wherein the bottom of the rack is fixedly connected with two support frames, the upper surfaces of the support frames are slidably connected with a slide box, the inside of the rack is rotatably connected with a driving rotating shaft, the surface of the driving rotating shaft is clamped with a pipe roller and a plate roller, the bottom of the rack is provided with a lifting mechanism, the bottom of the driving rotating shaft is provided with a bending mechanism, the inside of the slide box is provided with an extrusion mechanism, and the upper surface of the rack is fixedly provided with a control button. According to the metal bending method, the pipe roller rotates, the pipe material is moved to move left and right, feeding front and back is achieved simultaneously, long pipe materials can be well bent, the effect of extruding, rolling and bending the long pipe materials is achieved, and the problems that the long metal pipe materials are poor in bending effect and large in operation difficulty are solved.

Description

Metal bending and cutting method

Technical Field

The invention relates to the technical field of metal bending, in particular to a metal bending and cutting method.

Background

The bending machine is a machine capable of bending a thin plate, and is divided into a manual bending machine, a hydraulic bending machine and a numerical control bending machine, wherein the manual bending machine is divided into a mechanical manual bending machine and an electric manual bending machine, and the manual bending machine is used for pressing a steel plate into parts in various shapes according to process requirements.

In the process of using many existing bending machines, when some pipe materials and plate materials with longer lengths are bent, the problems of difficult bending and cutting exist, and when a slightly longer product is bent, an operator needs to push the product back and forth ceaselessly, so that the labor intensity of workers is increased, and the bending efficiency is greatly reduced.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a metal bending and cutting method, which solves the problems that a pipe material or a plate material is not easy to cut and bend when being processed due to overlong length.

In order to achieve the purpose, the invention provides the following technical scheme: a metal bending and cutting method is based on metal bending and cutting equipment and comprises a rack, wherein the bottom of the rack is fixedly connected with two support frames, the upper surfaces of the support frames are connected with a sliding box in a sliding mode, the inside of the rack is rotatably connected with a driving rotating shaft, a pipe roller and a plate roller are clamped on the surface of the driving rotating shaft, the pipe roller is located below the plate roller, the bottom of the rack is provided with a lifting mechanism, the bottom of the driving rotating shaft is provided with a bending mechanism, the inside of the sliding box is provided with an extrusion mechanism, the top of the sliding box is provided with a cutting mechanism, and the upper surface of the rack is fixedly provided with a control button; the cutting mechanism comprises a support, the bottom of the support is fixedly connected to the upper surface of the sliding box, the top of the support is fixedly connected with a fixing frame, the top of the fixing frame is fixedly connected with a first motor, the output end of the first motor is fixedly connected with a connecting shaft, the bottom of the connecting shaft is fixedly connected with an eccentric wheel, the surface of the eccentric wheel is in contact with a limiting plate, and the bottom of the limiting plate is fixedly connected with a saw blade; the bending mechanism comprises a limiting block, the surface of the limiting block is connected inside the rack in a sliding mode, the surface of the driving rotating shaft is connected inside the limiting block in a rotating mode, a screw is connected inside the limiting block in a threaded mode, a transmission gear is fixedly connected to the front end of the screw, a half gear is meshed with the surface of the transmission gear, a gear shaft is movably connected to the axis of the half gear, a jacking spring is sleeved on the surface of the gear shaft and located at the front portion of the half gear, and the rear portion of the half gear is in contact with the front portion of the rack; the metal bending and cutting method specifically comprises the following steps:

1) placing a metal workpiece on a rack;

2) a second motor is started, and the second motor drives the pipe roller and the plate roller to rotate through transmission of the gear sleeve and the first gear, so that feeding and feeding of workpieces are realized;

3) through the meshing transmission of the half gear and the transmission gear, the limiting block is driven to move back and forth, so that the integral pipe roller is driven to slowly move backwards, and a long workpiece is extruded and bent;

4) starting the electric push rod, and pushing the push frame to move back and forth by the electric push rod, so that two gears on the gear sleeve are meshed with the first gear at different positions, the rotating direction of the driving rotating shaft is changed, and the workpiece is repeatedly extruded and bent;

5) the first motor is started, the first motor drives the eccentric wheel to rotate, the limiting plate is further driven to move left and right to drive the saw blade to move left and right to achieve cutting, meanwhile, the two lead screws are driven to rotate through transmission of the belt, the moving block connected with the threads of the moving block slowly moves downwards, and the saw blade can also move downwards in the cutting process.

Preferably, the top of rack is rotated and is connected with two transmission shafts, and two transmission shafts all use the central line of rack as symmetry axis symmetric distribution, the drive pivot is located the middle part of two transmission shafts.

Preferably, sliding columns are fixedly connected to two sides of the saw blade, moving blocks are connected to the surfaces of the sliding columns in a sliding mode, a lead screw is connected to the inner portion of each moving block in a threaded mode, a belt pulley is fixedly connected to the top of the lead screw, the surfaces of the belt pulleys are in transmission connection with the surfaces of the two belt pulleys through a belt, the axis of each of the two belt pulleys is fixedly connected to the surface of the connecting shaft, and the bottom of the lead screw is rotatably connected to the surface of the support.

Preferably, the surface of screw rod is rotated and is connected in the inside of rack, the rear portion of stopper passes through connecting rod fixedly connected with connecting strip, the inside of connecting strip is rotated and is connected with the dwang, the surface of dwang is rotated and is connected with the intermediate block, the bottom fixed connection of intermediate block is at the upper surface of rack, the spacing groove has been seted up to the inside of dwang, the inner wall sliding connection of spacing groove has the sliding pin, the bottom fixedly connected with arm-tie of sliding pin, the anterior fixed connection of arm-tie is at the rear portion of slide box, the bottom of stopper is provided with thrust unit.

Preferably, thrust unit is including the connecting plate, the top fixed connection of connecting plate is in the bottom of stopper, the rear portion fixedly connected with second motor of connecting plate, the output of second motor and the rear end fixed connection of gear shaft, the surperficial joint of gear shaft has the gear sleeve, two second gears of the fixed surface of gear sleeve, the surface toothing of second gear has first gear, the axle center department of first gear and the bottom fixed connection of drive pivot, the right side fixedly connected with grillage of connecting plate, the rear portion fixedly connected with electric putter of grillage, two push frames of electric putter's output fixedly connected with, the gear sleeve is located between two push frames.

Preferably, the extrusion mechanism comprises two clamping columns, the surfaces of the two clamping columns are fixedly connected with sliding plates, the surfaces of the sliding plates are connected inside the sliding box in a sliding mode, springs are fixedly connected between the two clamping columns, and the springs are located inside the sliding box.

Preferably, the lifting mechanism comprises a lifting support plate, a connecting column is fixedly connected to the bottom of the lifting support plate, a clamping plate is fixedly connected to the surface of the connecting column, a clamping groove is formed in the surface of the support frame, the clamping plate is connected to the inner wall of the clamping groove in a sliding mode, and an inserting frame is inserted into the support frame in an inserting mode.

Compared with the prior art, the invention provides a metal bending and cutting method, which has the following beneficial effects:

1. according to the metal bending and cutting method, the pipe roller rotates, the pipe material is moved to move left and right, feeding front and back is achieved simultaneously, long pipe materials can be well bent, the effect of extruding, rolling and bending the long pipe materials is achieved, and the problems that the long metal pipe materials are poor in bending effect and large in operation difficulty are solved.

2. According to the metal bending and cutting method, the rotation direction of the driving rotating shaft is changed, so that the pipe roller can be manually controlled to rotate forwards and backwards, the effect of repeatedly extruding and bending the pipe material is achieved, the bending effect and quality of the pipe material are better, and the efficiency is higher.

3. According to the metal bending and cutting method, in the process of moving through the limiting block, the pulling plate is driven to move forwards through a lever principle, so that the two sliding pins are driven to move forwards, a pipe material forms good support after being bent, the condition that the pipe material cannot be supported in place, overturned and displaced after being bent is avoided, and the overall bending stability is improved.

4. According to the metal bending and cutting method, the saw blade can move downwards when swinging left and right in the cutting process to feed and cut the pipe material or the plate material downwards, so that the cutting efficiency can be greatly improved, and the quick cutting effect on metal products is facilitated.

5. According to the metal bending and cutting method, the whole working surface is improved by lifting the lifting support plate upwards, so that the plate can well perform machining movement on the surface of the plate roller, further the switching machining of the pipe material and the plate material is realized, and the overall universality and the applicability of the device are improved.

Drawings

FIG. 1 is a schematic view of an overall structure of a metal bending and cutting method according to the present invention;

FIG. 2 is a schematic view of a cutting mechanism of a metal bending and cutting method according to the present invention;

FIG. 3 is a schematic view of a bending mechanism of a metal bending and cutting method according to the present invention;

FIG. 4 is a schematic diagram of a pushing device for a metal bending and cutting method according to the present invention;

FIG. 5 is a schematic structural diagram of a gear sleeve of a metal bending and cutting method according to the present invention;

FIG. 6 is a schematic view of an extrusion mechanism of a metal bending and cutting method according to the present invention;

fig. 7 is a schematic diagram of a lifting mechanism of a metal bending and cutting method according to the present invention.

In the figure: 1. a rack; 2. a support frame; 3. a slide box; 4. a control button; 5. driving the rotating shaft; 6. a drive shaft; 7. a tube roll; 8. a plate roller; 9. a cutting mechanism; 901. a first motor; 902. a fixed mount; 903. a connecting shaft; 904. a support; 905. a double belt pulley; 906. an eccentric wheel; 907. a saw blade; 908. a limiting plate; 909. a traveler; 910. a moving block; 911. a screw rod; 912. a belt pulley; 10. a bending mechanism; 1001. a screw; 1002. a transmission gear; 1003. a half gear; 1004. a gear shaft; 1005. a second motor; 1006. a pushing device; 1007. the spring is tightly propped; 1008. a limiting block; 1009. a connecting strip; 1010. a middle block; 1011. rotating the rod; 1012. pulling a plate; 1013. a slide pin; 1014. a limiting groove; 1015. a first gear; 1016. a gear sleeve; 1017. a connecting plate; 1018. a second gear; 1019. an electric push rod; 1020. a pushing frame; 1021. a plate frame; 11. an extrusion mechanism; 111. clamping the column; 112. a slide plate; 113. a spring; 12. a lifting mechanism; 121. a lifting support plate; 122. connecting columns; 123. clamping a plate; 124. a card slot; 125. and (4) inserting a frame.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, a metal bending and cutting method includes a rack 1, two support frames 2 are fixedly connected to the bottom of the rack 1, a slide box 3 is slidably connected to the upper surface of each support frame 2, a driving rotating shaft 5 is rotatably connected to the inside of the rack 1, a pipe roller 7 and a plate roller 8 are clamped on the surface of the driving rotating shaft 5, the pipe roller 7 is located below the plate roller 8, a lifting mechanism 12 is arranged at the bottom of the rack 1, a bending mechanism 10 is arranged at the bottom of the driving rotating shaft 5, an extrusion mechanism 11 is arranged inside the slide box 3, a cutting mechanism 9 is arranged at the top of the slide box 3, and a control button 4 is fixedly mounted on the upper surface of the rack 1.

In this embodiment, the top of rack 1 is rotated and is connected with two transmission shafts 6, and two transmission shafts 6 all use the central line of rack 1 as symmetry axis symmetric distribution, and drive pivot 5 is located the middle part of two transmission shafts 6, can play fine spacing effect through pipe roller 7 and the board roller 8 above two transmission shafts 6, and at the extrusion in-process of bending, transmission shaft 6 is at the atress basically, so play fine atress effect, improve holistic effect of bending.

Further, the cutting mechanism 9 includes a bracket 904, the bottom of the bracket 904 is fixedly connected to the upper surface of the sliding box 3, the top of the bracket 904 is fixedly connected with a fixing frame 902, the top of the fixing frame 902 is fixedly connected with a first motor 901, the output end of the first motor 901 is fixedly connected with a connecting shaft 903, the bottom of the connecting shaft 903 is fixedly connected with an eccentric wheel 906, the surface of the eccentric wheel 906 contacts with a limiting plate 908, the bottom of the limiting plate 908 is fixedly connected with a saw blade 907, the eccentric rotation through the eccentric wheel 906, and then the left and right swinging of the saw blade 907 is driven, the effect of cutting the metal material is achieved, and therefore the metal product can be effectively cut after being bent.

Furthermore, sliding columns 909 are fixedly connected to both sides of the saw blade 907, a moving block 910 is connected to the surfaces of the sliding columns 909 in a sliding manner, a lead screw 911 is connected to the inner threads of the moving block 910, a belt pulley 912 is fixedly connected to the top of the lead screw 911, the surface of the belt pulley 912 is in transmission connection with the surfaces of the double belt pulleys 905 through a belt, the axis of the double belt pulleys 905 is fixedly connected to the surface of the connecting shaft 903, the bottom of the lead screw 911 is rotatably connected to the surface of the bracket 904, the two lead screws 911 are driven to rotate through the transmission of the belt, and the moving block 910 which is in threaded connection with the lead screw 911 is slowly moved downwards through the rotation of the lead screw 911, so that the saw blade 907 can also move downwards in the cutting process to cut the tube or the plate, and the cutting efficiency can.

In addition, the bending mechanism 10 includes a limiting block 1008, the surface of the limiting block 1008 is slidably connected inside the rack 1, the surface of the driving rotating shaft 5 is rotatably connected inside the limiting block 1008, the internal thread of the limiting block 1008 is connected with a screw 1001, the front end of the screw 1001 is fixedly connected with a transmission gear 1002, the surface of the transmission gear 1002 is engaged with a half gear 1003, the axis of the half gear 1003 is movably connected with a gear shaft 1004, the surface of the gear shaft 1004 is sleeved with a jacking spring 1007, the jacking spring 1007 is positioned at the front part of the half gear 1003, the rear part of the half gear 1003 is contacted with the front part of the rack 1, the rotation of the tube roller 7 and the plate roller 8 is driven by the rotation of the driving rotating shaft 5, the half gear 1002 is driven to rotate by being engaged with the transmission gear when rotating, the limiting block 1008 is driven to move back and forth, so as to drive the integral tube roller 7, the damage of metal materials can be reduced, the effect of slow bending is realized, and the integral bending quality is improved.

Besides, the surface of the screw 1001 is rotatably connected inside the rack 1, the rear part of the limit block 1008 is fixedly connected with a connecting strip 1009 through a connecting rod, the inside of the connecting strip 1009 is rotatably connected with a rotating rod 1011, the surface of the rotating rod 1011 is rotatably connected with a middle block 1010, the bottom of the middle block 1010 is fixedly connected with the upper surface of the rack 1, the inside of the rotating rod 1011 is provided with a limit groove 1014, the inner wall of the limit groove 1014 is slidably connected with a sliding pin 1013, the bottom of the sliding pin 1013 is fixedly connected with a pulling plate 1012, the front part of the pulling plate 1012 is fixedly connected with the rear part of the sliding box 3, the bottom of the limit block 1008 is provided with a pushing device 1006, in the moving process of the limit block 1008, the backward movement of the connecting strip 1009 is driven, through the lever principle, the effect that the sliding pin 1013 slides in the limit groove 1014, the pulling plate 1012 is driven to move forward, so that the, so that the pipe material can not be turned and shifted after being bent.

It is worth noting that the pushing device 1006 comprises a connecting plate 1017, the top of the connecting plate 1017 is fixedly connected to the bottom of the limiting block 1008, the rear portion of the connecting plate 1017 is fixedly connected with a second motor 1005, the output end of the second motor 1005 is fixedly connected to the rear end of the gear shaft 1004, the surface of the gear shaft 1004 is clamped with a gear sleeve 1016, the surface of the gear sleeve 1016 is fixedly connected with two second gears 1018, the surface of the second gear 1018 is engaged with a first gear 1015, the axial center of the first gear 1015 is fixedly connected to the bottom of the driving rotating shaft 5, the right side of the connecting plate 1017 is fixedly connected with a rack 1021, the rear portion of the rack 1021 is fixedly connected with an electric push rod 1019, the output end of the electric push rod 1019 is fixedly connected with two pushing frames 1020, the gear sleeve 1016 is located between the two pushing frames 1020, the pushing frames 1020 are pushed by the electric push rod 1019 to move back and forth, so that, thereby change the rotation direction of drive pivot 5 for pipe roller 7 can be artificial control and just rotate and the reversal, realize the effect of extruding repeatedly bending to the pipe material, make the effect of bending of pipe material better, efficiency is higher.

Referring to fig. 6-7, the pressing mechanism 11 includes two clamping posts 111, and the surfaces of the two clamping posts 111 are both fixedly connected with a sliding plate 112, the surface of the sliding plate 112 is slidably connected inside the sliding box 3, a spring 113 is fixedly connected between the two clamping posts 111, the spring 113 is located inside the sliding box 3, and the effect of the two clamping posts 111 and the effect of the spring 113 can clamp the sheet material or the pipe material relatively, so that the stability during the bending process is improved.

In this embodiment, lifting mechanism 12 is including rising extension board 121, the bottom fixedly connected with spliced pole 122 of rising extension board 121, the fixed surface of spliced pole 122 is connected with cardboard 123, draw-in groove 124 has been seted up on the surface of support frame 2, the sliding surface connection of cardboard 123 is at the inner wall of draw-in groove 124, support frame 2's inside is pegged graft and is had the inserted frame 125, through upwards lifting up rising extension board 121, later will insert frame 125 and insert the bottom of cardboard 123 and realize pegging graft fixedly, improve whole table surface, thereby make the sheet material can be fine carry out the processing motion on board roller 8 surface, unusual convenience is simple, and then realize the switching processing to tubular product and sheet material, improve the holistic commonality of equipment, and suitability.

The electrical components presented in the document are all electrically connected with an external master controller and 220V mains, and the master controller can be a conventional known device controlled by a computer or the like.

The working principle is that firstly, a long pipe is placed on the rack 1, the movement of the control button 4 is pressed, the rotation of the second motor 1005 is controlled firstly, the rotation of the second motor 1005 drives the two second gears 1018 on the gear sleeve 1016 to rotate, the meshing of the bevel gears drives the rotation of the first gear 1015, the rotation of the first gear 1015 drives the rotation of the driving rotating shaft 5, the rotation of the driving rotating shaft 5 drives the rotation of the pipe roller 7 and the plate roller 8, the pipe roller 7 drives the pipe to feed in the rotating process, the rotation of the second motor 1005 drives the rotation of the half gear 1003, the half gear 1003 drives the transmission gear 1002 to rotate, the half gear 1003 does not have full teeth, the transmission gear 1002 rotates for one circle, and the rotation of the transmission gear 1002 drives the limiting block 1008 to move back and forth, thereby driving the integral tube roller 7 to move backwards slowly, thereby realizing the effect of extruding, rolling and bending the long tube material, meanwhile, the button of the control button 4 can be pressed to start the electric push rod 1019, the electric push rod 1019 pushes the push frame 1020 to move forwards and backwards, thereby realizing the meshing of the two gears on the gear sleeve 1016 and the first gear 1015 at different positions, thereby changing the rotating direction of the driving rotating shaft 5, enabling the tube roller 7 to manually control to rotate forwards and backwards, realizing the effect of repeatedly extruding and bending the tube material, enabling the bending effect of the tube material to be better and the efficiency to be higher, and in the moving process of the limiting block 1008, the backward movement of the connecting strip 1009 can be driven, the backward movement of the connecting strip 1009 can drive the rotating rod 1011 to rotate, and the effect of sliding the sliding pin 1013 in the limiting groove 1014 can drive the pulling plate 1012 to move forwards, therefore, the two sliding boxes 3 are driven to move forwards, so that the pipe can be well supported after being bent, the pipe cannot be overturned and shifted after being bent, when the integral bending is completed, the first motor 901 can be started, the rotation of the first motor 901 can drive the eccentric wheel 906 to rotate, the eccentric wheel 906 can drive the limiting plate 908 to perform left-right swinging motion, so that the saw blade 907 can move left and right, the cutting effect is realized, meanwhile, the two lead screws 911 can be driven to rotate through the transmission of a belt, the lead screw 911 rotates to slowly move the moving block 910 in threaded connection with the lead screw down, the saw blade 907 can also move downwards in the cutting process to realize the effect of cutting the pipe or the plate, the cutting efficiency can be greatly improved, and when a long plate is bent, can lift up rising extension board 121 upwards, later will insert the frame 125 and insert and realize pegging graft fixedly in the bottom of cardboard 123 to make the sheet material can be fine carry out the processing motion on board roller 8 surface, unusual convenience is simple, and then realizes the switching processing to pipe material and sheet material, improve the holistic commonality of equipment, and the suitability.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Claims

1. A metal bending and cutting method is based on metal bending and cutting equipment which comprises a rack (1), the bottom of the rack (1) is fixedly connected with two support frames (2), the upper surface of each support frame (2) is connected with a sliding box (3) in a sliding way, a driving rotating shaft (5) is rotatably connected inside the rack (1), a pipe roller (7) and a plate roller (8) are clamped on the surface of the driving rotating shaft (5), the tube roller (7) is positioned below the plate roller (8), the bottom of the rack (1) is provided with a lifting mechanism (12), the bottom of the driving rotating shaft (5) is provided with a bending mechanism (10), the inside of the sliding box (3) is provided with an extrusion mechanism (11), a cutting mechanism (9) is arranged at the top of the sliding box (3), and a control button (4) is fixedly arranged on the upper surface of the rack (1); the cutting mechanism (9) comprises a support (904), the bottom of the support (904) is fixedly connected to the upper surface of the sliding box (3), the top of the support (904) is fixedly connected with a fixed frame (902), the top of the fixed frame (902) is fixedly connected with a first motor (901), the output end of the first motor (901) is fixedly connected with a connecting shaft (903), the bottom of the connecting shaft (903) is fixedly connected with an eccentric wheel (906), the surface of the eccentric wheel (906) is in contact with a limiting plate (908), and the bottom of the limiting plate (908) is fixedly connected with a saw blade (907); the bending mechanism (10) comprises a limiting block (1008), the surface of the limiting block (1008) is connected to the inside of the rack (1) in a sliding mode, the surface of the driving rotating shaft (5) is connected to the inside of the limiting block (1008) in a rotating mode, a screw rod (1001) is connected to the inside of the limiting block (1008) in a threaded mode, a transmission gear (1002) is fixedly connected to the front end of the screw rod (1001), a half gear (1003) is meshed to the surface of the transmission gear (1002), a gear shaft (1004) is movably connected to the axis of the half gear (1003), a jacking spring (1007) is sleeved on the surface of the gear shaft (1004), the jacking spring (1007) is located at the front portion of the half gear (1003), and the rear portion of the half gear (1003) is in contact with the front portion of the rack (;

the metal bending and cutting method specifically comprises the following steps:

1) placing a metal workpiece on a bench (1);

2) the second motor (1005) is started, and the second motor (1005) drives the pipe roller (7) and the plate roller (8) to rotate through the transmission of the gear sleeve (1016) and the first gear (1015), so that the feeding and feeding of workpieces are realized;

3) through the meshing transmission of the half gear 1003 and the transmission gear 1002, the limiting block (1008) is driven to move back and forth, so that the integral pipe roller (7) is driven to slowly move backwards, and a long workpiece is extruded and bent;

4) starting the electric push rod (1019), wherein the electric push rod (1019) pushes the push frame (1020) to move back and forth, so that two gears on the gear sleeve (1016) are meshed with the first gear 1015 at different positions, the rotating direction of the driving rotating shaft (5) is changed, and the workpieces are repeatedly extruded and bent;

5) the first motor (901) is started, the eccentric wheel (906) is driven to rotate by the first motor (901), the limiting plate (908) is further driven to swing left and right to drive the saw blade (907) to move left and right to achieve cutting, meanwhile, the two lead screws (911) are driven to rotate through transmission of the belt, the moving block (910) in threaded connection with the limiting plate is enabled to move downwards slowly, and the saw blade (907) can also move downwards in the cutting process.

2. A metal bend cutting method according to claim 1, characterized in that: the top of rack (1) is rotated and is connected with two transmission shafts (6), and two transmission shafts (6) all use the central line of rack (1) as symmetry axis symmetric distribution, drive pivot (5) are located the middle part of two transmission shafts (6).

3. A metal bend cutting method according to claim 1, characterized in that: the saw blade (907) is fixedly connected with sliding columns (909) on two sides, a moving block (910) is connected to the surface of each sliding column (909), a lead screw (911) is connected to the inner threads of each moving block (910), a belt pulley (912) is fixedly connected to the top of each lead screw (911), the surface of each belt pulley (912) is in transmission connection with the surface of each double belt pulley (905) through a belt, the axis of each double belt pulley (905) is fixedly connected to the surface of the connecting shaft (903), and the bottom of each lead screw (911) is rotatably connected to the surface of the support (904).

4. A metal bend cutting method according to claim 3, characterized in that: the surface of screw rod (1001) is rotated and is connected in the inside of rack (1), connecting rod fixedly connected with connecting strip (1009) is passed through to the rear portion of stopper (1008), the inside of connecting strip (1009) is rotated and is connected with dwang (1011), the surface of dwang (1011) is rotated and is connected with middle piece (1010), the bottom fixed connection of middle piece (1010) is at the upper surface of rack (1), spacing groove (1014) have been seted up to the inside of dwang (1011), the inner wall sliding connection of spacing groove (1014) has sliding pin (1013), the bottom fixed connection of sliding pin (1013) has arm-tie (1012), the anterior fixed connection of arm-tie (1012) is at the rear portion of smooth case (3), the bottom of stopper (1008) is provided with thrust unit (1006).

5. A metal bend cutting method according to claim 2, characterized in that: the pushing device (1006) comprises a connecting plate (1017), the top of the connecting plate (1017) is fixedly connected to the bottom of the limiting block (1008), the rear of the connecting plate (1017) is fixedly connected with a second motor (1005), the output end of the second motor (1005) is fixedly connected with the rear end of the gear shaft (1004), the surface of the gear shaft (1004) is clamped with a gear sleeve (1016), the surface of the gear sleeve (1016) is fixedly connected with two second gears (1018), the surface of the second gears (1018) is meshed with a first gear (1015), the axis of the first gear (1015) is fixedly connected with the bottom of the driving rotating shaft (5), the right side of the connecting plate (1017) is fixedly connected with a plate frame (1021), the rear of the plate frame (1021) is fixedly connected with an electric push rod (1019), and the output end of the electric push rod (1019) is fixedly connected with two pushing frames (1020), the gear sleeve (1016) is positioned between the two pushing frames (1020).

6. A metal bend cutting method according to claim 5, characterized in that: extrusion mechanism (11) is including two clamp posts (111), and the equal fixedly connected with slide (112) in surface of two clamp posts (111), the surperficial sliding connection of slide (112) is in the inside of sliding box (3), two fixedly connected with spring (113) between clamp post (111), spring (113) are located the inside of sliding box (3).

7. A metal bend cutting method according to claim 1, characterized in that: the lifting mechanism (12) comprises a lifting support plate (121), a connecting column (122) is fixedly connected to the bottom of the lifting support plate (121), a clamping plate (123) is fixedly connected to the surface of the connecting column (122), a clamping groove (124) is formed in the surface of the support frame (2), the surface of the clamping plate (123) is slidably connected to the inner wall of the clamping groove (124), and an inserting frame (125) is inserted in the support frame (2) in an inserting mode.