Numerical control bending machine for sheet metal processing

Abstract

The invention relates to the technical field of metal processing, in particular to a numerical control bending machine for sheet metal processing, which comprises a rack, a bending table is fixedly mounted on the lower side of the middle of the rack, and a sliding groove is formed in the upper end of the bending table corresponding to a metal wire; according to the metal wire bending device, when the pressing roller rotates, an ejector rod can also be driven to rotate synchronously, the ejector rod extrudes and pushes pressing plates on the two sides to slide on the lifting frame, a second compression spring and a hollow rubber bag, gas in the hollow rubber bag can be sprayed out from a nozzle pipe, and the metal wire can be bent through the nozzle pipe; according to the metal wire bending device, the cleaning plate is arranged, so that chippings accumulated at the joint of the cleaning plate and the metal wire can be removed, the situation that a large number of chippings are accumulated and the chippings are clamped between the metal wire and the cleaning plate when the metal wire continuously passes through the cleaning plate is reduced, scratches of the chippings on the surface of the metal wire are avoided, and therefore the bending quality of the metal wire is guaranteed; and the removed chippings fall on the bending table, so that concentrated cleaning is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of metal processing, and in particular to a numerically controlled bending machine used for sheet metal processing. Background Art

[0002] Metalworking, also known as metalworking, refers to the production activities of humans processing materials with metal characteristics that are composed of metal elements or mainly metal elements. It is a process technology that processes metal materials into objects, parts, and components, including large parts of bridges and ships, as well as tiny components of engines, jewelry, and watches. It is widely used in different fields such as science, industry, art, and handicrafts.

[0003] After searching, the patent with application number CN202320855163.2 discloses "a copper wire bending device with a positioning mechanism", including a base plate, characterized in that: the top of the base plate is fixedly connected to a power mechanism; a bending mold is passed through the bottom of the power mechanism, and a fixing screw is passed through the front of the bending mold.

[0004] However, when the above device is in use, debris from processing is likely to adhere to the surface of the copper wire. When the copper wire is directly bent, the debris is likely to cause pits on the surface of the copper wire, which is not conducive to the bending quality of the copper wire. Summary of the invention

[0005] The purpose of the present invention is to solve the problem in the prior art that the surface of the copper wire is easily adhered to debris during processing, and when the copper wire is directly bent, the debris easily causes pits on the surface of the copper wire, which is not conducive to the bending quality of the copper wire, and a CNC bending machine for sheet metal processing is proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A CNC bending machine for sheet metal processing comprises a frame, a bending table is fixedly installed on the lower side of the middle part of the frame, and a slide groove is provided at the upper end of the bending table corresponding to the metal wire; A bending mechanism for bending the metal wire on the bending table is also provided, the bending mechanism comprises a hydraulic cylinder fixedly mounted on the frame, a pressing die strip is fixedly mounted on the lower end of the hydraulic cylinder, a bending groove is provided on the middle part of the bending table corresponding to the pressing die strip, and pressing rollers are symmetrically provided on the upper side of the bending table. There is also an anti-pit mechanism for preventing pits from appearing on the surface of the metal wire when it is bent. The anti-pit mechanism includes a cleaning plate arranged on the side where the pressure rollers are away from each other, and a nozzle tube is fixedly installed on the upper side of the end of the cleaning plate away from each other.

[0007] Preferably, a lifting frame is rotatably installed at the front end of the pressure roller, the lifting frame is slidably installed on the front end of the bending table, a spring 1 is fixedly installed on the upper end of the lifting frame, the upper end of the spring 1 is fixedly installed on the bending table, and the front end of the cleaning plate is fixedly installed on the lifting frame.

[0008] Preferably, straightening plates are provided on both the left and right sides of the pressing die strip, connecting rods are fixedly mounted on the upper ends of the straightening plates, and the upper sides of the connecting rods are penetrated and slidably mounted on the pressing die strip.

[0009] Preferably, a spring four is sleeved on the outer side of the connecting rod, and the upper and lower ends of the spring four are fixedly connected to the pressing die strip and the straightening plate respectively.

[0010] Preferably, an elastic sheet is fixedly mounted on the upper end of the connecting rod, and a baffle is fixedly mounted on the lower side of the elastic sheet at the front end of the frame.

[0011] Preferably, the middle part of the lower end of the pressing die strip is symmetrically provided with clamps, and the ends of the clamps away from each other are fixedly installed with guide rods, and the ends of the guide rods away from each other are slidably installed on the pressing die strip, and springs five are sleeved on the outer sides of the guide rods.

[0012] Preferably, the ends of the clamping plates close to each other are fixedly mounted with steel wire ropes, the ends of the steel wire ropes close to each other are fixedly mounted with driving plates, and pulleys are provided inside the lower end of the pressing die strip corresponding to the steel wire ropes.

[0013] Preferably, the ends of the nozzle tubes close to each other are connected with hollow rubber bags, the left end of the hollow rubber bags is fixedly installed on the bending table, and the ends of the hollow rubber bags close to each other are fixedly installed with pressure plates, and the rear end of the pressure plate is slidably installed on the bending table.

[0014] Preferably, a second spring is fixedly mounted on one end of the pressure plates that is away from each other, the other end of the second spring is fixedly mounted on the lifting frame, and a push rod is fixedly mounted on the front end of the pressure roller.

[0015] Preferably, a magnetic brush is slidably installed on the end of the cleaning plate that is away from each other, an arc-shaped slide groove is provided on the cleaning plate corresponding to the magnetic brush, a spring three is fixedly installed on the front end of the magnetic brush, the front end of the spring three is fixedly installed on the cleaning plate, and a magnetic strip is provided on the side of the lower part of the magnetic brush that is close to each other, and the magnetic strip is fixedly installed on the lower end of the lifting frame.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the hydraulic cylinder is started to drive the pressing die bar to descend, and the metal wire on the lower side is bent. During the bending process of the metal wire, the friction force drives the pressing roller to rotate on the lifting frame. The provided pressing roller is convenient for limiting the position of the metal wire to prevent the metal wires on the left and right sides of the bending groove from tilting and then deviating during the bending process of the metal wire, thereby ensuring the bending quality of the metal wire.

[0017] 2. In the present invention, the cleaning plate is provided to facilitate the removal of debris adhering to the surface of the metal wire, and prevent the adhering debris from being squeezed by the pressing die strip, resulting in pits on the surface of the metal wire, thereby ensuring the bending quality of the metal wire.

[0018] 3. In the present invention, when the pressure roller rotates, it will also drive the push rod to rotate synchronously. The push rod squeezes and pushes the pressure plates on both sides to slide on the lifting frame, compressing the second spring and the hollow rubber bag. The gas in the hollow rubber bag will be ejected from the nozzle tube, which is conducive to removing the debris accumulated at the connection between the cleaning plate and the metal wire, reducing a large amount of debris accumulation. As the metal wire continuously passes through the cleaning plate, the debris is stuck between the metal wire and the cleaning plate, avoiding the debris from scratching the surface of the metal wire, thereby ensuring the bending quality of the metal wire. The removed debris falls on the bending table, which is convenient for centralized cleaning.

[0019] 4. In the present invention, when the pressure plates on both sides slide outward, the magnetic strips will also be driven to slide outward synchronously. When the magnetic strips pass the lower side of the magnetic brush, magnetic repulsion is generated on the magnetic brush, pushing the magnetic brush to slide along the arc-shaped slide groove, stretching spring three. The provided magnetic brush facilitates the re-brushing of debris that is difficult to clean with airflow at the connection between the cleaning plate and the metal wire, thereby ensuring the subsequent bending quality of the metal wire.

[0020] 5. In the present invention, when the pressing die bar descends to bend the metal wire, the driving plate will first contact the metal wire. As the pressing die bar continues to descend, the driving plate will be subjected to the pressure of the metal wire and move upward, and the clamping plates and guide rods on both sides are pulled by the wire rope and the pulley to move in a direction close to each other, compressing the spring five until the lower end of the driving plate shrinks into the internal cavity of the pressing die bar, and the driving plate is no longer subjected to the pressure of the metal wire and stops moving. At the same time, the clamping plates on both sides are made of elastic deformable material, and the clamping plates on both sides will deform to clamp and fix the middle part of the metal wire, effectively preventing the metal wire located in the middle of the pressing die bar from lacking fixation during the bending process, resulting in the metal wires on both sides being bent in the middle of the pressing die bar and sliding into the bending groove. The metal wires slide unevenly on the left and right sides. Once the length of one side is shorter, it is easy to bend out unqualified sheet metal parts, thereby ensuring the bending quality.

[0021] 6. In the present invention, a accommodating cavity for accommodating the clamping plate, guide rod and spring five is provided in the bending groove, which will not affect the situation that the clamping plate, guide rod and spring five cannot be accommodated when they descend to the bottom of the bending groove. When the pressing die bar descends, the connecting rod, straightening plate and elastic sheet will also be driven to descend synchronously. The elastic sheet will be blocked by the baffle plate, and then the connecting rod will drive the straightening plate to slide on the pressing die bar, compressing the spring four. When the pressing die bar descends to the bottom of the bending groove, the pressing die bar stops moving. At this time, the elastic sheet will gradually deform until it is deformed to separate from the baffle plate, and reset under the action of the spring four, driving the elastic sheet, connecting rod and straightening plate to descend rapidly, and knocking the metal wire at the upper end of the bending table and the two corners of the bending groove, thereby ensuring the bending angle of the metal wire, reducing the situation where the bending angle of the metal wire is restored, and ensuring the quality of the bending. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall left-side three-dimensional structure of the present invention when viewed from above; Figure 2 It is a schematic diagram of the overall three-dimensional structure of the present invention when viewed from above; Figure 3 It is a schematic diagram of the overall rear three-dimensional structure of the present invention; Figure 4 For the present invention Figure 1 A partially enlarged structural diagram of the connection between the middle bending table and the pressing die strip; Figure 5 For the present invention Figure 4 A partially enlarged structural diagram of the connection between the middle pressure roller, the cleaning plate and the lifting frame; Figure 6 For the present invention Figure 2 A partially enlarged structural diagram of the connection between the middle bending table and the pressing die strip; Figure 7 For the present invention Figure 5 The structural diagram at A in the middle; Figure 8 For the present invention Figure 4 The structural diagram at B in the middle; Fig. 9 For the present invention Figure 6 Schematic diagram of the structure at C in the middle; In the figure: 1. Frame; 2. Bending table; Bending mechanism: 3, hydraulic cylinder; 4, pressing die strip; 5, pressing roller; 6, lifting frame; 7, spring one; 17, straightening plate; 18, connecting rod; 19, spring four; 20, elastic sheet; 21, baffle; 22, clamping plate; 23, guide rod; 24, spring five; 25, wire rope; 26, driving plate; 27, pulley; Anti-pit mechanism: 8. Cleaning plate; 9. Nozzle tube; 10. Hollow rubber bag; 11. Pressing plate; 12. Spring 2; 13. Push rod; 14. Magnetic brush; 15. Spring 3; 16. Magnetic strip. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] Reference Figure 1-Figure 9 A CNC bending machine for sheet metal processing comprises a frame 1, a bending table 2 is fixedly installed on the lower side of the middle part of the frame 1, and a slide groove is provided at the upper end of the bending table 2 corresponding to the metal wire; a bending mechanism for bending the metal wire on the bending table 2 is also provided, the bending mechanism comprises a hydraulic cylinder 3 fixedly installed on the frame 1, a pressing die strip 4 is fixedly installed on the lower end of the hydraulic cylinder 3, and a bending groove is provided on the middle part of the bending table 2 corresponding to the pressing die strip 4, and pressure rollers 5 are symmetrically provided on the upper side of the bending table 2, and a lifting frame 6 is rotatably installed at the front end of the pressure roller 5, and the lifting frame 6 is slidably installed on the front end of the bending table 2, a spring 7 is fixedly installed on the upper end of the lifting frame 6, and the upper end of the spring 7 is fixedly installed on the bending table 2, and the front ends of the cleaning plates 8 are fixedly installed on the lifting frame 6, and the left and right sides of the pressing die strip 4 are provided with straightening plates 17, and the upper ends of the straightening plates 17 are fixed A connecting rod 18 is installed, and the upper side of the connecting rod 18 is slidably installed on the pressing die strip 4. A spring four 19 is sleeved on the outer side of the connecting rod 18. The upper and lower ends of the spring four 19 are fixedly connected to the pressing die strip 4 and the straightening plate 17 respectively. The upper end of the connecting rod 18 is fixedly installed with an elastic sheet 20, and the front end of the frame 1 is fixedly installed with a baffle 21 on the lower side of the elastic sheet 20. The middle part of the lower end of the pressing die strip 4 is symmetrically provided with a clamping plate 22. The ends of the clamping plates 22 away from each other are fixedly installed with a guide rod 23. The ends of the guide rods 23 away from each other are slidably installed on the pressing die strip 4. Springs five 24 are sleeved on the outer side of the guide rods 23. The ends of the clamping plates 22 close to each other are fixedly installed with a steel wire rope 25. The ends of the steel wire ropes 25 close to each other are fixedly installed with a driving plate 26, and a pulley 27 is provided inside the lower end of the pressing die strip 4 corresponding to the steel wire rope 25; During operation, the lifting frame 6 is pulled upward to compress the spring 7, and the lifting frame 6 drives the pressure roller 5 and the cleaning plate 8 to rise synchronously, so that the lower ends of the pressure roller 5 and the cleaning plate 8 are away from the upper end of the bending table 2, and then the metal wire is placed in the bending groove on the bending table 2, and the lifting frame 6 is released. The spring 7 pushes the lifting frame 6, the pressure roller 5, and the cleaning plate 8 to reset. The lower ends of the pressure roller 5 and the cleaning plate 8 clamp the metal wire on the bending table 2, and the hydraulic cylinder 3 is started to drive the pressing die 4 to descend to bend the metal wire on the lower side. During the bending process of the metal wire, the friction force drives the pressure roller 5 to rotate on the lifting frame 6. The set pressure roller 5 is convenient for limiting the metal wire to prevent the metal wire from bending during the bending process. In the embodiment of the present invention, the metal wires on the left and right sides of the bending groove are tilted and then offset, thereby ensuring the bending quality of the metal wires. When the pressing die strip 4 descends to bend the metal wires, the driving plate 26 will first contact the metal wires. As the pressing die strip 4 continues to descend, the driving plate 26 will be subjected to the pressure of the metal wires and move upward, and the clamping plates 22 and the guide rods 23 on both sides are pulled by the wire rope 25 and the pulley 27 to move in a direction close to each other, compressing the spring 5 24 until the lower end of the driving plate 26 is retracted into the internal chamber of the pressing die strip 4, and the driving plate 26 is no longer subjected to the pressure of the metal wires, and then stops moving. At the same time, the clamping plates 22 on both sides are made of elastic deformable materials. The clamping plates 22 on both sides will be deformed to clamp and fix the middle part of the metal wire, effectively preventing the metal wire located in the middle of the pressing die strip 4 from being fixed during the bending process, resulting in the metal wire on both sides being bent in the middle part of the pressing die strip 4 and sliding into the bending groove. The metal wire slides unevenly on the left and right sides. Once one side is shorter, it is easy to bend an unqualified sheet metal part, thereby ensuring the bending quality. The bending groove is provided with a receiving cavity for accommodating the clamping plate 22, the guide rod 23 and the spring five 24 to be embedded, which will not affect the clamping plate 22, the guide rod 23 and the spring five 24 when they descend to the bottom of the bending groove. When the pressing die strip 4 descends, the situation where they cannot be accommodated occurs. When the pressing die 4 is lowered to the bottom of the bending groove, the pressing die 4 stops moving. At this time, the elastic sheet 20 will gradually deform until it is separated from the baffle 21 and reset under the action of the spring four 19, driving the elastic sheet 20, the connecting rod 18 and the straightening plate 17 to drop rapidly, and knocking the metal wire at the upper end of the bending table 2 and the two corners of the bending groove, thereby ensuring the bending angle of the metal wire, reducing the recovery of the bending angle of the metal wire, and ensuring the quality of the bending.

[0026] As an embodiment of the present invention, there is also provided an anti-pit mechanism for preventing pits from appearing on the surface of the metal wire when the metal wire is bent. The anti-pit mechanism includes a cleaning plate 8 arranged at the side where the pressure rollers 5 are away from each other, and a nozzle tube 9 is fixedly installed on the upper side of the end of the cleaning plate 8 away from each other. The ends of the nozzle tubes 9 close to each other are connected and provided with a hollow rubber bag 10, and the left end of the hollow rubber bag 10 is fixedly installed on the bending table 2, and the ends of the hollow rubber bags 10 close to each other are fixedly installed with a pressing plate 11, and the rear end of the pressing plate 11 is slidably installed on the bending table 2. A spring 2 12 is fixedly installed at one end away from each other, and the other end of the spring 2 12 is fixedly installed on the lifting frame 6, and a push rod 13 is fixedly installed on the front end of the pressure roller 5, and a magnetic brush piece 14 is slidably installed on the end of the cleaning plate 8 away from each other, and an arc-shaped slide groove is provided on the cleaning plate 8 corresponding to the magnetic brush piece 14, and a spring 3 15 is fixedly installed at the front end of the magnetic brush piece 14, and the front end of the spring 3 15 is fixedly installed on the cleaning plate 8, and a magnetic strip 16 is provided on the side of the lower part of the magnetic brush piece 14 close to each other, and the magnetic strip 16 is fixedly installed on the lower end of the lifting frame 6; During operation, the cleaning plate 8 is provided to facilitate the removal of debris adhered to the surface of the metal wire, and prevent the adhered debris from being subjected to the extrusion force of the pressing die strip 4, resulting in pits on the surface of the metal wire, thereby ensuring the bending quality of the metal wire. When the pressing roller 5 rotates, it will also drive the push rod 13 to rotate synchronously. The push rod 13 squeezes and pushes the pressing plates 11 on both sides to slide on the lifting frame 6, compressing the spring 2 12 and the hollow rubber bag 10. The gas in the hollow rubber bag 10 will be ejected from the nozzle tube 9, which is conducive to removing the debris accumulated at the connection between the cleaning plate 8 and the metal wire, reducing the accumulation of a large amount of debris. As the metal wire continuously passes through the cleaning plate 8, the debris is stuck between the metal wire and the cleaning plate 8, which avoids the debris from scratching the surface of the metal wire, thereby ensuring the bending quality of the metal wire, and the removed debris falls on the bending table 2, which is convenient for centralized cleaning, and when the pressure plates 11 on both sides slide outward, they will also drive the magnetic strip 16 to slide outward synchronously. When the magnetic strip 16 passes under the magnetic brush sheet 14, it generates a magnetic repulsive force on the magnetic brush sheet 14, pushing the magnetic brush sheet 14 to slide along the arc-shaped slide groove, stretching the spring three 15. The set magnetic brush sheet 14 is convenient for brushing away the debris that is difficult to clean with airflow at the connection between the cleaning plate 8 and the metal wire, thereby ensuring the subsequent bending quality of the metal wire.

[0027] Working principle: When the present invention is used, the lifting frame 6 is pulled upward to compress the spring 7, and the lifting frame 6 drives the pressure roller 5 and the cleaning plate 8 to rise synchronously, so that the lower ends of the pressure roller 5 and the cleaning plate 8 are away from the upper end of the bending table 2, and then the metal wire is put into the bending groove on the bending table 2, and the lifting frame 6 is released. The spring 7 pushes the lifting frame 6, the pressure roller 5, and the cleaning plate 8 to reset. The lower ends of the pressure roller 5 and the cleaning plate 8 clamp the metal wire on the bending table 2, and the hydraulic cylinder 3 is started to drive the pressing die 4 to descend to bend the metal wire on the lower side. During the bending process of the metal wire, the friction force drives the pressure roller 5 to rotate on the lifting frame 6. The set pressure roller 5 is convenient for limiting the metal wire to prevent the metal wire on the left and right sides of the bending groove from being bent during the bending process. The cleaning plate 8 is convenient for removing the debris adhering to the surface of the metal wire to prevent the adhering debris from being squeezed by the pressing die strip 4, which causes pits on the surface of the metal wire, thereby ensuring the bending quality of the metal wire. When the pressing roller 5 rotates, it will also drive the push rod 13 to rotate synchronously. The push rod 13 squeezes and pushes the pressure plates 11 on both sides to slide on the lifting frame 6, compressing the spring 2 12 and the hollow rubber bag 10. The gas in the hollow rubber bag 10 will be ejected from the nozzle tube 9, which is conducive to removing the debris accumulated at the connection between the cleaning plate 8 and the metal wire, reducing the accumulation of a large amount of debris. As the metal wire continues to pass through the cleaning plate 8, the debris is stuck between the metal wire and the cleaning plate 8, avoiding the debris from scratching the surface of the metal wire, thereby ensuring the bending quality of the metal wire, and the removed debris falls on the bending table 2, which is convenient for centralized cleaning. When the pressure plates 11 on both sides slide outward, they will also drive the magnetic strips 16 to slide outward synchronously. When the magnetic strips 16 pass under the magnetic brush sheet 14, a magnetic repulsive force is generated on the magnetic brush sheet 14, pushing the magnetic brush sheet 14 to slide along the arc-shaped slide groove, stretching the spring three 15. The set magnetic brush sheet 14 is convenient for brushing away the debris that is difficult to clean with airflow at the connection between the cleaning plate 8 and the metal wire, thereby ensuring the subsequent bending quality of the metal wire. When the pressing die strip 4 descends to bend the metal wire, the driving plate 26 will first contact the metal wire. As the pressing die strip 4 continues to descend, the driving plate 26 will The movable plate 26 is subjected to the pressure of the metal wire and moves upward, and the clamping plates 22 and the guide rods 23 on both sides are pulled by the wire rope 25 and the pulley 27 to move in a direction close to each other, compressing the spring 5 24 until the lower end of the driving plate 26 is retracted into the internal chamber of the pressing die strip 4, and the driving plate 26 is no longer subjected to the pressure of the metal wire and stops moving. At the same time, the clamping plates 22 on both sides are made of elastic deformable materials. The clamping plates 22 on both sides will deform to clamp and fix the middle part of the metal wire, effectively preventing the metal wire located in the middle of the pressing die strip 4 from lacking fixation during the bending process, resulting in the metal wire on both sides bending in the middle of the pressing die strip 4 and sliding into the bending groove. The metal wire sliding length is uneven on the left and right sides.Once one side is shorter, it is easy to bend an unqualified sheet metal part, thereby ensuring the bending quality. The bending groove is provided with a receiving cavity for accommodating the clamping plate 22, the guide rod 23 and the spring five 24 to be embedded, which will not affect the clamping plate 22, the guide rod 23 and the spring five 24 when they fall to the bottom of the bending groove and cannot be accommodated. When the pressing die strip 4 falls, it will also drive the connecting rod 18, the straightening plate 17 and the elastic sheet 20 to fall synchronously. The elastic sheet 20 will be blocked by the baffle 21, which will cause the connecting rod 18 to drive the straightening plate 17 to fall. 7 slides on the pressing die strip 4 and compresses the spring four 19. When the pressing die strip 4 drops to the bottom of the bending groove, the pressing die strip 4 stops moving. At this time, the elastic sheet 20 will gradually deform until it is deformed to be separated from the baffle 21. Under the action of the spring four 19, it resets, driving the elastic sheet 20, the connecting rod 18 and the straightening plate 17 to drop rapidly, and knocking the metal wire at the upper end of the bending table 2 and the two corners of the bending groove, ensuring the bending angle of the metal wire, reducing the situation of the metal wire bending angle recovery, and ensuring the quality of the bending.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A CNC bending machine for sheet metal processing, comprising a frame (1), characterized in that: A bending table (2) is fixedly mounted on the lower middle side of the frame (1), and a sliding groove is provided at the upper end of the bending table (2) corresponding to the metal wire; A bending mechanism for bending the metal wire on the bending table (2) is also provided, the bending mechanism comprising a hydraulic cylinder (3) fixedly mounted on the frame (1), a pressing die strip (4) fixedly mounted on the lower end of the hydraulic cylinder (3), a bending groove corresponding to the pressing die strip (4) is provided on the middle of the bending table (2), and pressing rollers (5) are symmetrically provided on the upper side of the bending table (2); An anti-pitting mechanism is also provided for preventing pits from forming on the surface of the metal wire when the metal wire is bent. The anti-pitting mechanism comprises a cleaning plate (8) arranged at a side of the pressure rollers (5) that is away from each other, and a nozzle tube (9) is fixedly mounted on the upper side of the end of the cleaning plate (8) that is away from each other.

2. A CNC bending machine for sheet metal processing according to claim 1, characterized in that: The front end of the pressure roller (5) is rotatably mounted with a lifting frame (6), the lifting frame (6) is slidably mounted on the front end of the bending platform (2), the upper end of the lifting frame (6) is fixedly mounted with a spring 1 (7), the upper end of the spring 1 (7) is fixedly mounted on the bending platform (2), and the front end of the cleaning plate (8) is fixedly mounted on the lifting frame (6).

3. A CNC bending machine for sheet metal processing according to claim 1, characterized in that: The left and right sides of the pressing die strip (4) are both provided with straightening plates (17), the upper ends of the straightening plates (17) are both fixedly mounted with connecting rods (18), and the upper sides of the connecting rods (18) are both penetrated and slidably mounted on the pressing die strip (4).

4. A CNC bending machine for sheet metal processing according to claim 3, characterized in that: A spring four (19) is sleeved on the outer side of the connecting rod (18), and the upper and lower ends of the spring four (19) are respectively fixedly connected to the pressing die strip (4) and the straightening plate (17).

5. The CNC bending machine for sheet metal processing according to claim 3, characterized in that: An elastic sheet (20) is fixedly mounted on the upper end of the connecting rod (18), and a baffle (21) is fixedly mounted on the lower side of the elastic sheet (20) at the front end of the frame (1).

6. The CNC bending machine for sheet metal processing according to claim 1, characterized in that: The middle part of the lower end of the pressing die strip (4) is symmetrically provided with clamping plates (22) in front and back, and the ends of the clamping plates (22) that are away from each other are fixedly installed with guide rods (23), and the ends of the guide rods (23) that are away from each other are penetrated and slidably installed on the pressing die strip (4), and the outer sides of the guide rods (23) are sleeved with springs five (24).

7. A CNC bending machine for sheet metal processing according to claim 6, characterized in that: The ends of the clamping plates (22) that are close to each other are fixedly mounted with steel wire ropes (25), the ends of the steel wire ropes (25) that are close to each other are fixedly mounted with a driving plate (26), and a pulley (27) is provided inside the lower end of the pressing die strip (4) corresponding to the steel wire ropes (25).

8. The CNC bending machine for sheet metal processing according to claim 1, characterized in that: The ends of the nozzle tubes (9) close to each other are connected to each other and are provided with a hollow rubber bag (10), the left end of the hollow rubber bag (10) is fixedly mounted on the bending table (2), and the ends of the hollow rubber bag (10) close to each other are fixedly mounted with a pressing plate (11), and the rear end of the pressing plate (11) is slidably mounted on the bending table (2).

9. A CNC bending machine for sheet metal processing according to claim 8, characterized in that: A second spring (12) is fixedly mounted on one end of the pressure plates (11) that is away from each other, the other end of the second spring (12) is fixedly mounted on the lifting frame (6), and a push rod (13) is fixedly mounted on the front end of the pressure roller (5).

10. The CNC bending machine for sheet metal processing according to claim 1, characterized in that: A magnetic brush piece (14) is slidably mounted on one end of the cleaning plate (8) that is away from each other, an arc-shaped slide groove is provided on the cleaning plate (8) corresponding to the magnetic brush piece (14), a spring three (15) is fixedly mounted on the front end of the magnetic brush piece (14), the front end of the spring three (15) is fixedly mounted on the cleaning plate (8), and a magnetic strip (16) is provided on the side of the lower part of the magnetic brush piece (14) that is close to each other, and the magnetic strip (16) is fixedly mounted on the lower end of the lifting frame (6).

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