CN113953379A

CN113953379A - Knife bending machine

Info

Publication number: CN113953379A
Application number: CN202111189426.2A
Authority: CN
Inventors: 袁其锦
Original assignee: Shenzhen Adwo Automation Technology Co ltd
Current assignee: Shenzhen Adwo Automation Technology Co ltd
Priority date: 2019-08-26
Filing date: 2019-08-26
Publication date: 2022-01-21
Also published as: CN110465586A

Abstract

The invention discloses a knife bending machine which comprises a feeding part, a bridge cutting part and a bending part, wherein the feeding part, the bridge cutting part and the bending part are distributed on the same circular arc. The arc cutter bending adopts a concentric method, namely the concentric method, the central line of a feeding driving wheel of a feeding part is defined as a feeding central line, the tangent line of a bridge cutting functional punch of a bridge cutting part is a bridge cutting central line, the curved inner die side line of the curved part is a curved central line, and the three central lines point to the circle center of the arc cutter, so that the arc cutter or a straight cutter can be perpendicular to the central line of each part. The three functional components are arranged in such a way, so that the arc cutter can be accurately bent and cut off, and the function of the arc knife bending machine of the machine is completed.

Description

Knife bending machine

The invention relates to a divisional application with the application number of 201910786837.6 and the name of a full-automatic round-flat integrated bending cutter.

Technical Field

The invention belongs to the technical field of metal processing, and particularly relates to a knife bending machine.

Background

In general, in the production of complex figures of cartons, paper boxes, plastics and various artworks, a corresponding die cutter is needed, and the processes of die cutting, indentation and the like are carried out on raw materials through the die cutter, so that the mass and high-efficiency production can be realized. And the production of the die cutter needs to use a special die cutter processing machine to cut and form the steel cutter. The die cutter processing machine needs to perform the steps of blanking, grinding, bending and the like when processing a cutter die. Because the products produced by the die cutter are various in material and different in shape, the die cutter with different shapes needs to be produced.

The existing automatic computer knife bending machine can generally complete the functions of feeding, bending, shearing, bridging, olecranon, slotting and the like in one step. The existing knife bending machine can only bend a straight cutter of a flat die, and the volume of each part is larger. Because the circular arc cutter has various diameters and complex calculation, a practical circular arc cutter bending machine is not available at present, and only manual cutter bending can be realized.

The automatic bending device solves the problem of automatic bending of the arc cutter, has the function of bending the straight cutter, can bend cutters with different arc diameters and different arc degrees, and realizes the automation of functions such as bridge cutting, bending, shearing and the like.

Disclosure of Invention

The invention firstly proposes that the circular arc cutter is bent by adopting a concentric method, namely the concentric method, as shown in figure 2, the central line of a feeding driving wheel of a feeding part is defined as a feeding central line 201, the tangent line of a bridge cutting functional punch of a bridge cutting part 202 is a bridge cutting central line, the curved inner die side line of a curved part 203 is a curved central line, and the three central lines point to the circle center of the circular arc cutter, so that the circular arc cutter or a straight cutter can be perpendicular to the central line of each part. The three functional components are arranged in such a way, so that the arc cutter can be accurately bent and cut off, and the functions of the arc bending cutter and the cutter of the machine are completed.

The invention aims to provide a full-automatic round-flat integrated bending cutter machine, which adopts a fixed bridge cutting part, and a feeding part, a bending part and an angle compensation part which can rotate and advance and retreat to adapt to the bending and shearing of arc cutters with different diameters, so that the central lines of a plurality of processing parts always point to the circle center of the arc cutter during each processing, and the accuracy of the bending cutter and the cutting cutter is ensured.

The whole machine of the full-automatic round and flat integrated bending cutter is shown as the attached figure 1: the device comprises a feeding part 101, a bridge cutting part 102, a bending part 103, a diameter compensation part 104, an angle compensation part 105, a cutter frame part 106, a rack part 107, an electrical control part 108 and a computer-controlled CAD system 109.

The invention aims to provide a full-automatic round-flat integrated bending cutter which adopts the components, has high processing precision and is suitable for straight cutters of circular arc cutters with different diameters.

An angle compensation component, as shown in fig. 3: the device comprises a 301 angle compensation tensioning sleeve, a 302 angle compensation speed reducer and a 303 angle compensation servo motor.

Through the angle compensation component, the feeding component and the bending component can be rotated by a certain angle, so that feeding, bridge cutting, bending and shearing of different arc cutters (or straight cutters) are realized, and the central lines of the feeding component and the bending component are perpendicular to the arc cutters.

Preferably, the 302-degree compensation speed reducer and the 303-degree compensation servo motor ensure high rotation precision, large moment and small volume.

Preferably 301 angle compensation tensioning sleeves are directly connected with the feeding part and the bending part to ensure the connection tightness.

Diameter compensation components, as shown in FIG. 4: the device comprises a main bottom plate of a 401 circular knitting machine, a main guide rail of the 402 circular knitting machine, a diameter compensation synchronous pulley of 403, a diameter compensation bearing seat of 404, a diameter compensation servo motor of 405, a flange seat of a servo motor of 406, a diameter compensation screw rod of 407, a diameter compensation part cylinder of 408 locking, a diameter compensation moving plate of 409, a bridge cutting part mounting seat of 410, a bending part mounting groove of 411 locking, a diameter compensation part sliding block of 412, a bending part angle compensation part of 413, a feeding part cylinder mounting groove of 414 locking and a feeding part angle compensation part of 415.

The diameter compensation part can ensure that the feeding part and the bending part angle compensation part reach the same circular arc diameter under the condition that the bridge cutting part is not moved, and the current position is locked.

The main bottom plate of the circular machine 401, the main guide rail of the circular machine 402, the diameter compensating bearing seat 404, the diameter compensating part air cylinder 408 and the bridge cutting part mounting seat 410 are fastened on the main bottom plate of the circular machine, and the bridge cutting part mounting seat is provided with the bridge cutting part, so that the bridge cutting part is kept still in the diameter compensating process.

The 409 diameter compensation moving plate, the 411 locking bending component mounting groove, the 414 locking feeding component cylinder mounting groove, the 413 bending component angle compensation component, the 415 feeding component angle compensation component and the 412 diameter compensation component sliding block are all mounted on the 409 diameter compensation moving plate, wherein the feeding component angle compensation mounting hole is connected with the feeding component above by screws. The bending member is also screwed to the bending member.

Preferably, a 405 diameter compensation servo motor rotates to drive 403 the diameter compensation synchronous belt wheel, and rotates 407 the diameter compensation screw rod, so that the diameter compensation moving plate carries the feeding part, the bending part, the shearing part and the angle compensation part to move forwards or backwards to reach the set diameter position.

After the diameter compensation is completed, the 408 locking diameter compensation part cylinder is opened, and the diameter compensation moving plate is locked.

An angle compensation device of 413 bending components and 415 feeding components is arranged on the diameter compensation moving plate, when the diameter compensation is in place, the angle compensation is carried out, so that the feeding components, the bridge cutting components and the bending components are distributed on the same circular arc, and the central line defined in figure 2 points to the circle center of the circular arc cutter.

A feeding component, as shown in figure 5: the feeding device comprises a 501 feeding speed reducer and a servo motor, a 502 feeding rotating completion locking cylinder, a 503 feeding cylinder support, a 504 feeding driven wheel cylinder, a 505 feeding driven wheel slide block and a pressing strip, a 506 feeding driven wheel, a 507 feeding driven wheel support, a 508 feeding driving wheel, a 509 feeding upper and lower rolling clamping wheel, a 510 feeding front and rear rolling clamping wheel, a 511 feeding driving wheel support, a 512 feeding clamping wheel support, a 513 feeding bottom plate, a 514 feeding angle compensation mounting hole and a 515 feeding part rotating locking block.

The feeding part can drive the feeding driving wheel and the feeding driven wheel to hold the arc cutter tightly to advance or retreat through the servo motor, and is connected with the angle compensation part through the feeding angle compensation mounting hole, so that the feeding part can be ensured to rotate by a certain angle.

Preferably 501 feed reducers and servomotors, precisely rotate 508 the feed capstan. 506 the feeding driven wheel compresses the arc cutter, and the feeding driving wheel drives the arc cutter to rotate, thereby realizing the forward or backward movement of the arc cutter.

Preferably 504 feeding driven wheel cylinders ensure that the pressure of the feeding driven wheel pressing knife is enough to avoid the slipping of knife materials.

Preferably 505 feeding driven wheel sliding blocks and pressing strips are installed into 503 feeding supports, and feeding driven wheels are guaranteed, so that the precision and the size are small enough.

Preferably, 507 feeding is carried out from a driving wheel bracket and 511 feeding bracket, and bearings are arranged at two ends of the driving wheel bracket, so that the driving wheel can roll more smoothly.

Preferably 513 the feeding base plate is mounted 415 to the feeding member angle compensating means through 514 the feeding angle compensating mounting hole so that the entire feeding member can be rotated at a certain angle.

Preferably 509 feeding up-and-down rolling clamping wheels, 510 feeding front-and-back rolling clamping wheels, 512 feeding guide wheel supports and adjusting the feeding positions of the circular arc cutters or the straight cutters.

Since the whole feeding member is mounted on the diameter compensating member, it can be moved forward or backward in its entirety to reach a specified circular arc diameter.

Bridge cut parts, as shown in fig. 6: the device comprises a 601 round die cutter, 602 bridge cutting fixed U-shaped grooves, 603 bridge cutting part guide wheels, 604 bridge cutting dies (see fig. 9), 605 bridge cutting slide blocks and pressing strips, 606 bridge cutting slide blocks, 607 bridge cutting slide block inserts, 608 bridge cutting eccentric shafts, 609 bridge cutting eccentric shaft sleeves, 610 bridge cutting part covers, 611 bridge cutting flange mounting seats, 612 bridge cutting motor flanges, 613 bridge cutting function selection screw rods, 614 bridge cutting function bearing seats, 615 function selection servo motors, 616 synchronous wheel synchronous belts, 617 servo motor supports and 618 bridge cutting speed reduction motors.

The bridge position component uses a bridge cutting speed reducing motor as the power of bridge cutting, selects different punching positions by 615 function selection servo motor and 616 synchronous wheel synchronous belt, and can provide selection punching positions, including bridge position, olecranon, flat cutting, back opening, punching and cutting, as shown in fig. 11.

Preferably, the 605 bridge position speed reducing motor provides punching power, and has the advantages of large output force, stable output force and high speed.

Preferably 604 bridge cutting dies, which comprise different cutting modes, such as olecranon, back opening, bridge position, punching and cutting. Different punching modes are selected by selecting a servo motor and a 616 synchronous wheel synchronous belt through a 615 bridge cutting function.

Preferably 615 the bridge cutting function selection servo motor and 616 the synchronous wheel synchronous belt to rotate 613 the bridge cutting function selection screw rod to drive the bridge position die to reach different die positions to die cut the arc-shaped cutter, thereby achieving the purpose of die cutting different shapes.

Preferably, a 611 bridge cutting flange mounting seat is used for supporting 618 a bridge cutting speed reduction motor to provide power, and the bracket is mounted on a 602 bridge cutting fixed U-shaped groove, so that the arc cutter is not moved, the bridge cutting die is moved, and different punching effects can be selected; wherein, the eccentric shaft is rotated by the bridge cutting speed reducing motor, the eccentric shaft drives 606 the bridge cutting slide block to move up and down, and the moving direction of the bridge cutting slide block is restrained by the left and right pressing strips of 605 bridge cutting slide block.

The U-shaped groove is fixed through 602 bridge cutting, and the mounting seat of the 410 bridge cutting part in the main bottom plate of the 401 circular knitting machine is locked, so that the whole machine is kept still, the bridge cutting part serves as the front end boundary of the circular arc cutter, and the feeding part and the bending part on two sides can compensate the length and the angle around the bridge position part, so that all four main parts are ensured to point to the circle center of the circular arc cutter on the central line of the circular arc cutter.

A flexure, shown in figure 7: the bending and bending type hydraulic servo motor comprises a 701 bending and bending locking cylinder, a 702 bending and bending locking guide rod, a 703 bending bottom plate, a 704 bending head support, a 705 bending shaft synchronizing wheel, a 706 bending and shearing conversion bottom plate, a 707 cylinder handle, a 708 bending and shearing conversion cylinder, a 709 bending inner die fixing support, a 710 bending part locking cylinder, a 711 bending servo motor and speed reducer, a 712 bending motor flange, a 713 bending driving synchronizing wheel, a 714 bending auxiliary support, a 715 bending support bearing seat, a 716 bending shaft inner die, a 717 bending feed guide block, a 718 bending shaft outer die, a 719 bending part guide rail and a 720 bending part angle compensation mounting hole.

The bending part bends the cutter through the inner die and the outer die of the bending shaft, and the angle and the advancing and retreating length of the bending part are adjusted to control the center line of the bending part to point to the circle center of the arc cutter.

Preferably 716 the inner bending shaft die, through which the circular arc cutter passes through a slit in the middle of the inner bending shaft die, and 718 the outer bending shaft die, which bends the circular arc blade, the shape of the curved circular arc being provided by the CAD control system.

Preferably, 711 bending servo motors and speed reducers, 705 bending synchronous belts, 713 bending shaft synchronous wheels and 712 bending motor flanges are used for providing power for bending arc cutters, accurately controlling the rotating angle and ensuring the accuracy of the bent angle.

Preferably 708 the bend shear shifting cylinder pulls the bending module to bring the entire bend axis inner and outer dies to the bend cut position. The inner and outer modes of the bending shaft are shown in FIG. 8, when the bending shaft is at 802 and 804 positions, the finished cutter can be cut, and when the bending shaft is at 801,803 positions, only the cutter is bent.

It is preferable that the rotating shaft support is bent 704 and the inner mold fixing plate is bent 709 to fix the bent inner and outer molds, thereby functioning to rotatably support the inner and outer molds.

The 703 bending bottom plate is optimized, the 720 bending angle compensation mounting hole and the 413 bending component angle compensation device are connected and fastened through the threaded mounting hole, the bending component can be rotated for a certain angle, and the requirement of bending circular arc cutters with different diameters is met.

A701 bending locking cylinder is preferably selected to provide power for locking the arc cutter, the arc cutter is locked when the bending shaft works through the 702 bending locking guide rod, and the accurate length is guaranteed.

Bending axis inner and outer dies fig. 8, 802 inner die bend position, 801 inner die bend cut position, 804 outer die bend position, 803 outer die bend cut position.

The bending shaft changes the bending and bending positions through the following air cylinder, and only completes the function of a bending cutter when the bending shaft is positioned at 802 and 804, and only completes the function of a bending cutter when the bending shaft is positioned at 801 and 803.

And the control component is shown in figure 1, and controls each servo motor through the computer control card to execute corresponding action so as to ensure that the central line of each component points to the center of the circular arc cutter.

Preferably 108 electrical appliance control boxes, 109 computer control CAD system, including display, keyboard and mouse, according to CAD graph shape in the computer, send out the order to each servo motor, accomplish each item function such as feeding, bridge position, olecranon, punching a hole, bending, shearing.

The rotating angle part and the diameter compensation part are controlled by selecting different circular arc diameters in a computer, so that the feeding part, the bridge cutting part and the bending part reach the positions of the center lines of the feeding part, the bridge cutting part and the bending part which simultaneously point to the circle center.

A blade holder assembly, as shown in fig. 9: the device comprises a 901X moving guide rail, a 902 arc tool rest base plate, a 903 arc tool, a 904 rolling sliding upright post, a 905 rolling limiting rod, a 906Y moving guide rail, a 907 rolling tool storage post and a 908 moving positioning plate.

The cutter disc frame component limits one point of circular arcs with different diameters by moving the sliding block, and the point is just tangent to the bridge position component.

Preferably 906 roll and deposit the post, 908 move the locating plate, 904 roll and slide the post, make it movable and locatable, the diameter of restriction circular arc cutter, facilitate the rotation of circular arc cutter.

Preferably, the 901X moving guide rail and the 906Y moving guide rail are arranged on the base plate of the 902 circular tool rest, so that the diameter of the circular tool can be adjusted conveniently to clamp the circular tool.

The 905 rolling limiting rod, 907 rolling tool storage column and 904 rolling sliding column are all in a rolling rotor form, so that the arc-shaped tool can smoothly rotate and move inside.

Bridge cutting die, as shown in figure 10: the device comprises a 1001 bridge punch, a 1002 bridge lower block, a 1003 bridge upper block, a 1004 functional module, a 1005 bridge positioning handle, a 1006 bridge guide pillar and a 1007 bridge spring.

The bridge cutting die comprises a 1002 bridge position lower block convenient to disassemble, a 1003 bridge position upper block, a 1001 functional punch and a 1005 bridge position positioning handle, wherein the 1005 bridge position positioning handle receives motor power and downward acting force, and the functional punch, a punching cutter and a 1007 bridge position spring absorb elastic force.

Preferably, 1005 bridge positioning handles lose the power of the motor, and 1007 bridge springs release the elastic force to rebound the bridge punch.

Preferably, the 1005 bridge positioning handle can be positioned up and down, and plays a certain guiding role for the bridge positioning handle, so that the service life of the 1001 functional punch is prolonged.

Preferably, 1004 bridge functional blocks are selected, bridge functional blocks with different shapes, such as olecranon, bridge position, flat cutting, tooth punching and back opening, can complete different punching functions, and each bridge functional block is designed to complete a single function, so that each block can be made as small as possible, and the use cost is saved.

The primary bridge cutting die is shaped as shown in fig. 11, 1101 bridge positioning handles, 1102 bridge functional punches, 1103 bridge functional blocks.

The preferable T-shaped 1102 bridge position functional punch and the 1101 bridge position positioning handle have no screw hole, are convenient to produce and mount and save cost.

The internal T-shaped 1103 bridge position functional block is preferably selected, the finished function is single, the size is small, and the replacement cost is saved.

Preferably, as shown in figure 12, an example working tool 1201 is a 487 diameter circular arc tool curved grooving tool, and 1202 is a straight cutting tool with a bridging position.

Drawings

Fig. 1 is a layout diagram of a whole machine in a full-automatic round, flat, bending and cutting all-in-one machine in the embodiment of the invention.

Fig. 2 is a center line definition diagram of the fully automatic round, flat, bending and cutting all-in-one machine in the embodiment of the invention.

Fig. 3 is a diagram of an angle compensation component in the full-automatic round, flat, bending and cutting all-in-one machine in the embodiment of the invention.

Fig. 4 is a diagram of a diameter compensation component in the full-automatic round flattening, bending and cutting all-in-one machine in the embodiment of the invention.

Fig. 5 is a diagram of a feeding part in the full-automatic round, flat, bending and cutting all-in-one machine in the embodiment of the invention.

Fig. 6 is a diagram of a bridge cutting component in the full-automatic round, flat, bending and cutting all-in-one machine in the embodiment of the invention.

Fig. 7 is a diagram of a bending part in the full-automatic round, flat, bending and cutting all-in-one machine in the embodiment of the invention.

Fig. 8 is an inner and outer mold diagram of a bending shaft in the full-automatic round, flat, bending and cutting all-in-one machine in the embodiment of the invention.

Fig. 9 is a diagram of the cutter head frame component in the full-automatic round flat bending and cutting all-in-one machine in the embodiment of the invention.

Fig. 10 is a diagram of a bridge cutting die in the full-automatic round, flat, bending and cutting all-in-one machine in the embodiment of the invention.

Fig. 11 is an important shape diagram of a bridge cutting die in the full-automatic round, flat, bending and cutting all-in-one machine in the embodiment of the invention.

Fig. 12 is a diagram of an example of a bending tool in the fully automatic round, flat, bending and cutting all-in-one machine according to the embodiment of the invention.

Detailed Description

The embodiment is a preferred embodiment of the invention, and other principles and basic structures which are the same as or similar to the embodiment are within the protection scope of the invention.

An example of this is the cutter shape shown in figure 12. If the diameter of the curved arc cutter needs to be changed from a straight cutter to an arc cutter with the diameter of 487 mm, a groove with a bridge position is curved.

The computer drives 405 a diameter compensation servo motor according to the set data, so that the feeding component, the bending component and the angle compensation component move forwards together to the 487 circular arc cutter diameter position.

408 the diameter compensation part is tightly pressed, and the cylinder is opened to lock the current position.

415 the feeding component angle compensation device rotates anticlockwise by a specific angle, so that the center line of the feeding component is positioned at the position pointing to the center of the 487 circular arc cutter, and 502 the cylinder of the feeding component is locked to be opened, and the current position is locked.

413 the angle compensation device of the bending component rotates clockwise by a specific angle, so that the center line of the bending component is positioned at the position pointing to the center of the 487 arc cutter, and 710 the cylinder of the bending component is locked and opened, and the current position is locked.

The above-mentioned operations from [0076] to [0081] are required for changing the diameter of the circular-arc knife. The feeding part, the bridge part and the bending part reach corresponding working positions, and the action of the bending arc cutter is performed below.

The cutter frame component is adjusted, see fig. 9, namely 907 rolling cutter storage columns are adjusted, 908 moving positioning plates move on 901X moving guide rails and 906Y moving guide rails to be adapted to the circular arc cutters with 487 diameters, and the moving positioning plates are fixed to limit the arrangement range of the circular arc cutters.

Inserting the prepared 487 circular arc cutter into the feeding part, the bridge part, the bending part, the 504 feeding driven wheel cylinder and the 487 circular arc cutter, compressing the 487 circular arc cutter, enabling the feeding part to advance the circular arc cutter according to the length of the CAD graph, and enabling the 501 feeding speed reducer and the servo motor to feed and retreat.

The computer program judges the bridge cutting position and the cutting mode, such as olecranon, back opening, tooth punching, bridge position and flat cutting, and the servo motor and the synchronous belt drive are selected according to the function 602, the bridge cutting mold reaches the cutting position, the 618 bridge position speed reducing motor is started to drive the 606 bridge position to slide downwards to move, the bridge cutting mold is pressed on the 1005 bridge position positioning handle, the 1001 function punch is downward to cut the circular arc cutter, and the selected cut is cut.

When the bridge position speed reducing motor returns, the 1007 bridge position spring rebounds, the bridge position positioning handle pulls out the functional punch to complete the punching action, and the bridge position speed reducing motor is closed.

After receiving the control command of the bend angle or the bend arc, the 711 bending servo motor and the reducer start to execute the rotation action to realize clockwise bending or anticlockwise bending at 802 and 804 positions. The circular arc cutter is bent in the shape of illustration 1201 in fig. 12. When the tool is bent, the 701 bending and bending locking cylinder is opened to lock the tool, the bent rear cylinder is closed, and the arc tool starts to advance and retreat.

After the shape is bent, the position of a bent cutter is unchanged, a 708 bending shearing conversion cylinder is opened, the whole inner bending die and the whole outer bending die are pushed to move forwards to reach the 801 bending position, the outer bending die is rotated to cut off the bent cutter, the 708 bending shearing conversion cylinder is closed, and the inner bending die and the outer bending die return to the bending position.

Example 2 die cut 1202 in fig. 12.

504 the feed slave wheel cylinder is closed and the existing tool is removed.

408 press the flexure cylinder shut off, releasing the current position. 413 the bending member angle compensating means rotates counterclockwise by a certain angle back to the bending member initial position.

502 locks the charging member cylinder closed and releases the current position. 415 the feeding member angle compensating device rotates clockwise by a certain angle to return the feeding member to the initial position.

408 hold down the diameter compensating member cylinder shut, releasing the current position.

The computer drives 405 a diameter compensation servo motor according to the set data to retract the feeding component, the bending component and the angle compensation component to the initial positions.

All the steps complete the conversion of the equipment from the arc bending state to the initial cutter state.

502 tightly pushing the feeding part, and opening the cylinder to lock the current position.

The transform block is cut 720 apart. Pushing back the entire bending and shearing elements.

And installing a finished cutter receiving box.

A straight cutter is placed into the feeding part, the bridge position part and 504 feeding driven wheel cylinder are opened, and the existing cutter is pressed.

The computer program judges the bridge position and the punching mode, such as olecranon, back opening, tooth punching, bridge position and flat cutting, and the servo motor and the synchronous belt wheel are selected by function 615 for driving, the bridge cutting die reaches the punching position, the 618 bridge cutting speed reducing motor is started to drive the 606 bridge position to slide downwards and move to press the 1005 bridge position positioning handle, the 1001 function punch head is downwards to punch the arc cutter, the selected cut is punched, and the punching waste falls into the waste material box.

And after punching, cutting off the finished cutter according to the length, and dropping the cut finished cutter into a finished cutter receiving box.

Claims

1. The knife bending machine is characterized by comprising a feeding part, a bridge cutting part and a bending part, wherein the feeding part, the bridge cutting part and the bending part are distributed on the same circular arc; the feeding part comprises a feeding driving wheel and a feeding driven wheel, the feeding driven wheel tightly presses the arc cutter, the feeding driving wheel drives the arc cutter to rotate to realize the forward or backward movement of the arc cutter, the bridge cutting part comprises a bridge cutting die for punching the arc cutter, and the bridge cutting die comprises a bridge position lower block convenient to disassemble, a bridge position upper block and a functional punch; the bending part comprises a bending shaft, the bending shaft is provided with a bending shaft inner die and a bending shaft outer die, the arc cutter penetrates through a gap in the middle of the bending shaft inner die, and the bending shaft outer die bends the arc blade.

2. The knife bending machine according to claim 1, wherein the center line of the feeding driving wheel of the feeding part is a feeding center line, the functional punch tangent line of the bridge cutting part is a bridge cutting center line, the inner mold side line of the bending shaft of the bending part is a bending center line, and the three center lines point to the center of the circular arc cutter, so that the circular arc cutter or the straight cutter can be perpendicular to the center line of each part.

3. The knife bending machine according to claim 1, further comprising a diameter compensation part, wherein the diameter compensation part comprises a circular machine main bottom plate, a circular machine main guide rail, a diameter compensation servo motor, a diameter compensation screw rod, a diameter compensation bearing seat, a diameter compensation part sliding block and a diameter compensation moving plate, the diameter compensation servo motor drives the diameter compensation moving plate to slide on the circular machine main bottom plate along the circular machine main guide rail through the diameter compensation screw rod, the diameter compensation bearing seat and the diameter compensation part sliding block, the feeding part and the bending part are mounted on the diameter compensation moving plate, the bridge cutting part is mounted on the circular machine main bottom plate, and the diameter compensation moving plate carries the feeding part and the bending part to move forwards or backwards to reach a set diameter position.

4. The knife bending machine according to claim 3, wherein the angle compensating means having the feeding unit and the bending unit mounted on the diameter compensating moving plate comprises a feeding unit angle compensating unit and a bending unit angle compensating unit for rotating the feeding unit and the bending unit by a predetermined angle, and the feeding unit angle compensating unit and the bending unit angle compensating unit respectively use an angle compensating servo motor to drive the feeding unit and the bending unit to rotate by a predetermined angle.

5. The knife bending machine according to claim 4, wherein the feeding member angle compensation member and the bending member angle compensation member respectively comprise an angle compensation servomotor, an angle compensation decelerator, and an angle compensation tension sleeve, and are connected to the feeding member and the bending member through the tension sleeve.

6. The knife bending machine of claim 1, further comprising an angle compensation assembly for angularly rotating the feed assembly and the bending assembly, the angle compensation assembly including an angle compensation servomotor driving an angle compensation tensioning sleeve coupled to the feed assembly and the bending assembly.

7. The knife bending machine according to claim 3, wherein the diameter compensating unit further comprises a locking diameter compensating unit cylinder for locking the diameter compensating moving plate by opening the locking diameter compensating unit cylinder after the diameter compensation is completed.

8. The knife bending machine according to claim 4, wherein the diameter compensation moving plate is further provided with a locking feeding unit cylinder mounting groove, a locking feeding unit cylinder, a locking bending unit mounting groove, and a locking bending unit cylinder, the locking feeding unit cylinder being opened for locking the current position of the feeding unit, and the locking bending unit cylinder being opened for locking the current position of the bending unit.

9. The knife bending machine of claim 1, wherein the feed assembly further comprises a feed reducer and a servo motor.

10. The knife bending machine according to claim 1, wherein the feeding member further comprises a feeding upper and lower rolling pinch roller, a feeding front and rear rolling pinch roller, a feeding pinch roller support and a feeding base plate, the feeding upper and lower rolling pinch roller and the feeding front and rear rolling pinch roller being mounted on the feeding pinch roller support, the feeding pinch roller support being mounted on the feeding base plate.

11. The knife bending machine according to claim 1, wherein the feeding component further comprises a feeding driven wheel cylinder, a feeding cylinder support, a feeding driven wheel slider and a pressing strip, and the feeding driven wheel cylinder and the feeding driven wheel slider and the pressing strip are mounted on the feeding cylinder support.

12. The knife bending machine according to claim 1, further comprising a feeding member angle compensation device, wherein the feeding member further comprises a feeding base plate, the feeding base plate is provided with a feeding angle compensation mounting hole, and the feeding member is mounted to the feeding member angle compensation device through the feeding angle compensation mounting hole, so that the entire feeding member can rotate by a certain angle.

13. The knife bending machine according to claim 1, wherein the bridge cutting part further comprises a bridge cutting flange mounting seat, a bridge cutting speed reduction motor, an eccentric shaft, a bridge cutting slider and a bridge cutting slider pressing strip, the bridge cutting flange mounting seat supports the bridge cutting speed reduction motor to provide power, the bridge cutting speed reduction motor rotates the eccentric shaft, the eccentric shaft drives the bridge cutting slider to move up and down, and the bridge cutting slider pressing strip controls the movement direction of the bridge cutting slider left and right.

14. The knife bending machine according to claim 13, wherein the bridge cutting part further comprises a bridge cutting function servo motor, a bridge cutting function selection screw rod and a bridge cutting function bearing seat, the bridge cutting function servo motor drives the bridge cutting function selection screw rod to drive the bridge position die to reach different die positions to cut the arc-shaped knife, so as to achieve the purpose of cutting different shapes.

15. The knife bending machine according to claim 14, wherein the bridge cutting part further comprises a bridge cutting fixed U-shaped groove, the bridge cutting die moves in the bridge cutting fixed U-shaped groove, and the bridge cutting function servo motor drives the bridge cutting function selection screw to drive the bridge cutting die to different die positions to cut the circular arc knife.

16. The knife bending machine according to claim 1, wherein the bending unit further comprises a bending servo motor and a reducer for providing power for bending the circular arc cutter.

17. The knife bending machine according to claim 1, further comprising a bending part angle compensation device, wherein the bending part further comprises a bending base plate, the bending base plate is provided with a bending angle compensation mounting hole, and the bending base plate is connected and fastened with the bending part angle compensation device through the bending angle compensation mounting hole, so that the bending part can rotate by a certain angle to meet the requirement of bending circular arc cutters with different diameters.

18. The knife bending machine of claim 1, wherein the bending unit further comprises a bending and bending locking cylinder and a bending and bending locking guide, the bending and bending locking cylinder providing a power to lock the circular arc blade, and the bending and bending locking guide locking the circular arc blade when the bending shaft is operated.

19. The knife bending machine according to claim 1, wherein the outer bending-shaft die has a lower bending position and an upper bending-cutting position, the lower bending position is a gap of equal width, the upper bending-cutting position is a gap of gradually decreasing width from bottom to top, the inner bending-shaft die also has a bending position and a bending-cutting position, the bending position and the bending-cutting position of the inner bending-shaft die are slits, the bending part further comprises a bending-shearing transformation cylinder, the bending shear transformation bottom plate comprises a bending shear transformation bottom plate, and a bending rotating shaft support and a bending inner mold fixing support which are arranged on the bending shear transformation bottom plate, wherein the bending inner mold fixing support and the bending rotating shaft support are used for fixing a bending shaft inner mold and a bending shaft outer mold to form a bending module, the bending inner mold and the bending shaft outer mold are rotatably supported, a bending shear transformation cylinder drags the bending module, and the bending positions and the bending cutting positions of the bending shaft inner mold and the bending shear transformation cylinder are transformed by the bending shear transformation cylinder.

20. The knife block machine of claim 1, further comprising a knife holder assembly on which knives are placed to feed the infeed assembly.

21. The knife bending machine according to claim 20, wherein the knife holder rack component comprises an X-moving guide rail, a circular arc knife holder bottom plate, a rolling sliding column, a rolling limiting rod, a Y-moving guide rail, a rolling knife storage column and a moving positioning plate; the X moving guide rail and the Y moving guide rail are arranged on the arc tool rest base plate, so that the diameter of the arc tool can be conveniently adjusted to clamp the arc tool; the rolling limiting rod, the rolling tool storage column and the rolling sliding column are all in a rolling rotor form, so that the arc-shaped tool can smoothly rotate and move inside.