Automatic tool arrangement mechanism for upper press tool of bending center and operation method thereof

Abstract

The present invention relates to an automatic tool arrangement mechanism for pressing knives on a bending center and an operating method thereof, and relates to the technical field of bending centers. The present invention effectively solves the problem that existing bending centers are inconvenient to replace and adjust tools, which affects processing efficiency, and the adjustment method of the pressing knives is relatively complicated and has low precision; the technical solution includes: the automatic tool arrangement mechanism for pressing knives on a bending center and an operating method thereof adopt a plurality of independent movable pressing knives to form a structure with independently adjustable pressing knife lengths, and the lengths of the pressing knives involved in the bending can be automatically adjusted according to the width of the workpiece to be bent, which can facilitate bending workpieces of different widths, greatly save manpower and improve processing efficiency, and the first knife adjustment mechanism, the second knife adjustment mechanism, the lateral movement mechanism and the connecting mechanism on both sides can be adjusted independently, and the length of the pressing knife structure on the corresponding side can be adjusted separately, thereby improving bending precision, making it more convenient to accurately bend asymmetric workpieces, and better meeting processing requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of bending centers, and in particular to an automatic tool arrangement mechanism for upper pressing knives in a bending center and an operating method thereof. Background Art

[0002] A press brake is a machine used in the manufacturing and fabrication industries to bend or form sheet metal into specific shapes. It typically operates by clamping the sheet metal in place and then using a mechanical or hydraulic system to bend the metal along a predetermined axis. Press brakes play a vital role in industries that require accurate and efficient shaping of sheet metal, reducing the need for manual labor and improving the overall quality of the finished product.

[0003] When bending a product, a bending center needs to press the product with a pressing tool. The pressing effect of the pressing tool can directly affect the quality of the product bending process. When performing bending forming of different sizes, existing bending centers need to frequently replace tools of different sizes. The existing tool replacement is generally done manually. Due to the heavy weight of the tool, the labor intensity of the tool replacement workers is high. For different bending shapes and sizes, tools of different sizes must be customized, which wastes a lot of manpower and material resources, affects processing efficiency and increases equipment use costs. At the same time, the existing bending center has a relatively complicated adjustment method for the pressing tool, and the adjustment accuracy of the pressing tool length is low, which is not convenient for accurate correspondence with the edge of the workpiece and cannot meet existing processing needs.

[0004] In view of the above, the present invention provides an automatic tool arrangement mechanism for a pressing tool on a bending center and an operating method thereof to solve the above problems. Summary of the Invention

[0005] In response to the above situation, the present invention provides an automatic tool arrangement mechanism for a pressing knife on a bending center and an operating method thereof. The device does not require manual replacement of the pressing knife, and can facilitate bending workpieces of different widths, greatly saving manpower while improving processing efficiency. The first knife adjustment mechanism and the second knife adjustment mechanism on both sides, as well as the lateral movement mechanism and the connecting mechanism can be adjusted independently, and the overall length of the pressing knife structure participating in the bending on the corresponding side can be adjusted separately, so that the pressing knives participating in the bending on both sides are fully aligned with the edge of the workpiece, thereby improving the bending accuracy of the workpiece, and making it easier to accurately bend asymmetric workpieces, which can better meet processing requirements.

[0006] A bending center upper press knife automatic arrangement mechanism and its operation method, comprising a connecting plate, a mounting frame and a press knife slide rail, wherein the mounting frame is fixedly connected to the bottom end of the connecting plate and the press knife slide rail is fixedly connected to the lower surface of the mounting frame, both sides of the middle part of the side of the connecting plate are provided with a lateral movement mechanism and the movable end of the lateral movement mechanism is transmission-connected with a screw slider connection mechanism that can be laterally translated, a fixed press knife is fixedly installed in the middle part of the lower surface of the press knife slide rail and both sides of the fixed press knife are respectively provided with a first blade adjustment mechanism and a second blade adjustment mechanism that can be finely adjusted, the mounting frame is away from the side of the screw slider connection mechanism Both ends of the movable knife are provided with a limiting clamping mechanism that can limit and fix the first knife adjustment mechanism and the second knife adjustment mechanism, and the first knife adjustment mechanism and the second knife adjustment mechanism are provided with a movable knife that can be slidably connected to the knife pressing slide rail on the side away from the fixed knife pressing mechanism. The side of the movable knife pressing mechanism is provided with a connecting mechanism that can connect adjacent movable knife pressing mechanisms to each other, and the connecting mechanism includes a third cylinder, a latch, a connecting pin and a pin hole. The third cylinder is fixedly connected to the top of the movable knife pressing mechanism near the side of the horizontal moving mechanism and the end of its movable rod body is fixedly connected to the latch, and the connecting pin is fixedly connected between the movable knife pressing mechanism and the second knife adjusting mechanism. The top of the adjacent movable pressing knives close to each other and the end thereof are provided with a pin hole adapted to the plug pin, the top of the movable pressing knives are provided with a socket corresponding to the connecting pin on the side of the adjacent movable pressing knives and the connecting pin on the adjacent movable pressing knives can be inserted into the socket, the plug pin is passed through the interior of the socket and can be inserted into the pin hole at the end of the connecting pin inside it; the outside of the top of the screw slider connecting mechanism is fixedly connected to a movable slide and the lower surface of the movable slide is away from the screw slider connecting mechanism. A knife pressing push-pull mechanism that can adjust the position of the movable pressing knife is provided, and the knife pressing push-pull mechanism includes a fourth cylinder, a push-pull plate, and a second push-pull pressing knife. And the fifth cylinder, the fixed cylinder body of the fourth cylinder is horizontally fixedly installed on the lower surface of the movable slide and the end of the movable rod body is fixedly connected to the push-pull plate, the second push-pull press knife is fixedly connected to the bottom end of the push-pull plate and is slidably connected to the press knife slide rail and corresponds horizontally to the movable press knife, the fixed cylinder body of the fifth cylinder is fixedly installed on the side of the push-pull plate away from the second push-pull press knife and the end of its movable rod body is also fixedly connected to a pin, and the top of the side surface of the second push-pull press knife is also provided with a socket corresponding to the connecting pin on the movable press knife, and the pin at the movable end of the fifth cylinder can be inserted into the pin hole of the connecting pin on the adjacent movable press knife.

[0007] Preferably, the first blade adjustment mechanism and the second blade adjustment mechanism have the same structure and are symmetrically arranged with the vertical midline of the connecting plate as the symmetry axis, both of which include a blade rotation assembly, a blade adjustment assembly and a blade fixing assembly, the blade rotation assembly including a fixing frame, a second reduction motor, a rotating rod, a rotating block and a blade, the fixing frame is fixedly connected to the side surface of the connecting plate and the second reduction motor is fixedly installed at the bottom of the side surface of the fixing frame, the rotating rod is connected to the output end of the second reduction motor through a spline and is rotatably connected to the bottom end inside the fixing frame, the number of the blades is several and the several blades are all fitted together and sleeved on the end of the outside of the rotating rod away from the second reduction motor, the rotating block is fixedly installed on the outside of the rotating rod and abuts against the blade;

[0008] The blade knife adjustment assembly includes a third reduction motor, a second lead screw, a lead screw nut, a translation plate, a rotating ring and an insertion rod. The second lead screw is connected to the output end of the third reduction motor through a spline and is rotatably connected to the top of the fixed frame. The third reduction motor is fixedly mounted on the top of the side of the fixed frame. The lead screw nut is transmission-connected to the outside of the second lead screw and the translation plate is fixedly connected to the outside of the lead screw nut. The rotating ring is embedded in the bottom end of the translation plate and sleeved on the outside of the rotating rod. The insertion rod is fixedly connected to the movable end of the rotating ring and inserted into the side of the blade knife.

[0009] The blade knife fixing assembly includes a support frame, a first cylinder, a spring rod and a rotating clamping plate. The support frame is fixedly connected to the top of the fixing frame at a position vertically corresponding to the blade knife, and the fixed cylinder body of the first cylinder is rotatably connected to the top of the support frame. Both sides of the fixed cylinder body of the first cylinder are connected to the spring rods by bolts. The top of the rotating clamping plate is hinged to the end of the first cylinder movable rod body and the two spring rods. The middle part of the rotating clamping plate is rotatably connected to the end of the support frame away from the fixed frame and the bottom end can be clamped with the blade knife.

[0010] Preferably, the number of blades in the first blade adjustment mechanism is twice the number of blades in the second blade adjustment mechanism, and the thickness of the blades in the first blade adjustment mechanism is half the thickness of the blades in the second blade adjustment mechanism, and the overall thickness of the multiple blades in the first blade adjustment mechanism is the same as the overall thickness of the multiple blades in the second blade adjustment mechanism.

[0011] Preferably, the lateral movement mechanism includes a first reduction motor and a first lead screw, the first lead screw is connected to the output end of the first reduction motor through a spline, and the first reduction motor is fixedly mounted on the side of the connecting plate.

[0012] Preferably, the screw slider connection mechanism includes a screw slider, a connecting seat and a first push-pull pressing knife. The screw slider is connected to the outside of the first screw through a threaded transmission and the connecting seat is fixedly connected to the bottom of the screw slider. The first push-pull pressing knife is fixedly connected to the bottom end of the connecting seat and is laterally slidably connected to the pressing knife slide rail and corresponds horizontally to the fixed pressing knife and the movable pressing knife. The movable slide is horizontally fixedly connected to the outside of the screw slider.

[0013] Preferably, the limit clamping mechanism includes a second cylinder, a rotating lever, a rotating shaft and a clamping block, the fixed cylinder body of the second cylinder is rotatably connected to the end of the upper surface of the mounting frame and the end of the movable rod body is rotatably connected to the rotating lever, the outer surface of the rotating shaft is sleeved with a fixed block and the fixed block is fixedly connected to the lower surface of the mounting frame, the rotating shaft is horizontally rotatably connected to the inside of the fixed block and one end of the rotating shaft is fixedly connected to the bottom end of the rotating lever through a spline, the clamping block is fixedly connected to the end of the rotating shaft away from the rotating lever and corresponds to the blade on the same side and can be clamped with the corresponding blade, the two limit clamping mechanisms correspond to the first blade adjustment mechanism and the second blade adjustment mechanism respectively and are symmetrically arranged with the vertical center line of the mounting frame as the symmetry axis.

[0014] Preferably, the number of the screw slider connection mechanism and the knife pressing push-pull mechanism is two, and the two screw slider connection mechanisms and the knife pressing push-pull mechanism are symmetrically arranged with the vertical center line of the connecting plate as the symmetry axis.

[0015] A method for operating an automatic tool arrangement mechanism for a press tool on a bending center comprises the following steps:

[0016] 1. In the initial state, the first blade adjustment mechanism and the second blade adjustment mechanism on both sides are in a downward pressing state, corresponding to the movable pressing knives on both sides, the pressing knife push-pull mechanisms on both sides are in a state of being away from each other and separated from the movable pressing knife, and the screw slider connection mechanism and multiple movable pressing knives on the same side are connected to each other through the connection mechanism; when the width of the bent workpiece changes, the length of the upper pressing knife of the press brake needs to be automatically arranged. At this time, the lateral moving mechanisms on both sides drive the screw slider connection mechanism, the interconnected movable pressing knives and the pressing knife push-pull mechanism to move left and right together, so that the screw slider connection mechanisms on both sides can respectively abut against the first blade adjustment mechanism and the second blade adjustment mechanism;

[0017] Second, simultaneously move the knife pressing push-pull mechanisms on both sides toward the adjacent movable knife pressing edge. When the knife pressing push-pull mechanisms abut against the adjacent movable knife pressing edge, connect the outer knife pressing push-pull mechanisms to the adjacent movable knife pressing edge through the connecting mechanism.

[0018] 3. Then, the connecting mechanism on the movable pressing knife at the appropriate length position matching the width of the workpiece to be bent is disengaged from the adjacent movable pressing knife, and then the pressing knife push-pull mechanism drives the other movable pressing knives connected to it to move away from the fixed pressing knife, so that the movable pressing knives that do not need to participate in the bending of the plate are pulled to the outside, and the inner movable pressing knife forms a whole with the first blade adjustment mechanism, the second blade adjustment mechanism and the fixed pressing knife;

[0019] 4. When the adjustment is completed, if the end of the movable pressing knife participating in the bending and corresponding to the edge of the workpiece cannot be completely aligned with the edge of the workpiece, the first knife adjusting mechanism and the second knife adjusting mechanism can be adjusted so that the overall length of the movable pressing knives participating in the bending on both sides and the lead screw slider connecting mechanism after abutting with the first knife adjusting mechanism and the second knife adjusting mechanism can be completely aligned with the width of the workpiece, and the adjustment precision of the first knife adjusting mechanism and the second knife adjusting mechanism are different and can be adjusted independently, so as to facilitate more accurate adjustment of the spacing between the movable pressing knives participating in the bending on both sides;

[0020] 5. Then control the lateral moving mechanisms on both sides to drive the screw slider connecting mechanisms on both sides and the movable pressing knife involved in the knife splicing to move to the side close to the first knife adjustment mechanism and the second knife adjustment mechanism and abut against them, so as to finely adjust the position of the movable pressing knife involved in the bending, so that the movable pressing knife involved in the bending can be accurately aligned with the edge of the workpiece, so that the mechanism can accurately bend the workpiece through the external control unit.

[0021] The beneficial effects of the above technical solution are:

[0022] The automatic knife arrangement mechanism of the pressing knife on the bending center and its operation method adopts multiple independent movable pressing knives to form a structure with independently adjustable pressing knife length. The length of the pressing knife structure required to be bent can be automatically adjusted according to the width of the workpiece to be bent through the cooperation of the pressing knife pushing and pulling mechanism and the connecting mechanism. There is no need to manually replace the pressing knife, which can facilitate bending workpieces of different widths. Each movable pressing knife is independently provided with a connecting mechanism, which is convenient for quickly adjusting the connection state between each movable pressing knife according to the situation, thereby achieving the purpose of rapid adjustment, greatly saving manpower and improving processing efficiency. The length of the pressing knife involved in the bending can be more accurately adjusted through the first knife adjusting mechanism and the second knife adjusting mechanism. At the same time, the first knife adjusting mechanism and the second knife adjusting mechanism on both sides as well as the horizontal moving mechanism and the connecting mechanism can be independently adjusted, and the overall length of the pressing knife structure involved in the bending on the corresponding side can be adjusted separately, so that the pressing knives involved in the bending on both sides are fully aligned with the edge of the workpiece, thereby improving the bending accuracy of the workpiece, and making it more convenient to accurately bend asymmetric workpieces, which can better meet processing needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the front view of the present invention;

[0025] Figure 3 This is a schematic diagram of the screw slider connection mechanism of the present invention;

[0026] Figure 4 A schematic diagram of the connecting plate of the present invention, which is away from the side of the screw slider connecting mechanism;

[0027] Figure 5 This is a schematic diagram of a side sectional view of the movable pressing knife of the present invention;

[0028] Figure 6 Schematic diagram of the second blade adjustment mechanism of the present invention;

[0029] Figure 7 This is a schematic diagram of the blade-folding state of the second blade adjustment mechanism of the present invention;

[0030] Figure 8 Schematic diagram of the position limiting and clamping mechanism of the present invention.

[0031] In the figure: 1. Connecting plate; 2. Mounting frame; 3. Pressing knife slide rail; 4. Fixed pressing knife; 5. Movable pressing knife; 6. Moving slide; 7. First reduction motor; 8. First lead screw; 9. Lead screw slider; 10. Connecting seat; 11. First push-pull pressing knife; 13. Blade rotating assembly; 1301. Fixed frame; 1302. Second reduction motor; 1303. Rotating rod; 1304. Rotating block; 1305. Blade; 14. Blade adjusting assembly; 1401. Third reduction motor; 1402. Second lead screw; 140 3. Screw nut; 1404. Translation plate; 1405. Rotating ring; 1406. Insert rod; 15. Blade fixing assembly; 1501. Support frame; 1502. First cylinder; 1503. Spring rod; 1504. Rotating clamping plate; 16. Second cylinder; 17. Rotating lever; 18. Rotating shaft; 19. Clamping block; 20. Third cylinder; 21. Pin; 22. Connecting pin; 23. Pin hole; 24. Insert hole; 25. Fourth cylinder; 26. Push-pull plate; 27. Second push-pull knife press; 28. Fifth cylinder. DETAILED DESCRIPTION

[0032] The above and other technical contents, features and effects of the present invention are described below with reference to the attached Figures 1 to 8 It can be clearly presented in the detailed description of the embodiments that the structural contents mentioned in the following embodiments are all referenced to the drawings in the specification.

[0033] This embodiment provides a bending center upper press knife automatic tool arrangement mechanism, as shown in the attached Figure 1-8As shown, it includes a connecting plate 1, a mounting frame 2 and a press slide 3. The connecting plate 1 can be fixedly connected to an external power module, and the connecting plate 1 and its overall structure are controlled by the external power module to bend the workpiece. The mounting frame 2 is fixedly connected to the bottom end of the connecting plate 1 and the press slide 3 is fixedly connected to the lower surface of the mounting frame 2. Both sides of the middle part of the side of the connecting plate 1 are provided with a horizontal movement mechanism. The horizontal movement mechanism includes a first reduction motor 7 and a first lead screw 8. The first lead screw 8 is connected to the output end of the first reduction motor 7 through a spline and the first reduction motor 7 is fixedly mounted on the side of the connecting plate 1. The two horizontal movement mechanisms are symmetrically arranged with the vertical center line of the connecting plate 1 as the symmetry axis, and can respectively control the adjustment of the movable press 5 on both sides.

[0034] The movable end transmission connection of the transverse moving mechanism is provided with a screw slider connection mechanism that can be laterally translated. The screw slider connection mechanism includes a screw slider 9, a connecting seat 10 and a first push-pull press knife 11. The screw slider 9 is connected to the outside of the first screw 8 through a threaded transmission and the connecting seat 10 is fixedly connected to the bottom of the screw slider 9. The first push-pull press knife 11 is fixedly connected to the bottom end of the connecting seat 10 and is laterally slidably connected to the press knife slide rail 3 and corresponds horizontally to the fixed press knife 4 and the movable press knife 5. The top of the first push-pull press knife 11 close to the side of the movable press knife 5 is also fixedly connected with a connecting pin 22. The connecting pin 22 on the first push-pull press knife 11 can be inserted into the jack 24 on the side of the adjacent movable press knife 5, and through the third cylinder 2 on the movable press knife 5 0 Insert the pin 21 into the pin hole 23 on the connecting pin 22 on the side of the first push-pull press knife 11, so as to connect the first push-pull press knife 11 and the movable press knife 5 into a whole. The movable slide 6 is horizontally fixedly connected to the outside of the screw slider 9. The side of the movable slide 6 close to the connecting plate 1 is fixedly connected to the slide rail, and the side of the connecting plate 1 corresponding to the slide rail is horizontally fixedly connected to the guide rail. The slide rail is horizontally slidably connected to the guide rail, which can support and guide the movable slide 6; the first reduction motor 7 drives the first screw 8 to rotate, which can drive the screw slider 9 to move horizontally, thereby driving the first push-pull press knife 11 at the bottom and the external movable slide 6 to move synchronously, which is convenient for adjusting the overall horizontal position of the movable press knife 5 and the position of the press knife push-pull mechanism.

[0035] A fixed knife 4 is fixedly installed in the middle of the lower surface of the knife pressing slide 3, and the first knife adjustment mechanism and the second knife adjustment mechanism that can be finely adjusted are respectively provided on both sides of the fixed knife pressing slide 3. The first knife adjustment mechanism and the second knife adjustment mechanism have the same structure and are symmetrically arranged with the vertical center line of the connecting plate 1 as the symmetry axis. They both include a knife rotating assembly 13, a knife adjusting assembly 14 and a knife fixing assembly 15. The knife rotating assembly 13 includes a fixed frame 1301, a second reduction motor 1302, a rotating rod 1303, a rotating block 1304 and a knife 1305. The fixed frame 1301 is fixedly connected On the side of the connecting plate 1 and the second reduction motor 1302 is fixedly installed at the bottom of the side of the fixed frame 1301, the rotating rod 1303 is connected to the output end of the second reduction motor 1302 through a spline and is rotatably connected to the bottom end inside the fixed frame 1301, the number of blade knives 1305 is several and the several blade knives 1305 are all fitted together and sleeved on the end of the outside of the rotating rod 1303 away from the second reduction motor 1302, the blade knives 1305 can rotate on the outside of the rotating rod 1303, and the rotating block 1304 is fixedly installed on the outside of the rotating rod 1303 and abuts against the blade knives 1305.

[0036] The blade adjustment assembly 14 includes a third reduction motor 1401, a second lead screw 1402, a lead screw nut 1403, a translation plate 1404, a rotating ring 1405 and an insertion rod 1406. The second lead screw 1402 is connected to the output end of the third reduction motor 1401 through a spline and is rotatably connected to the top of the fixed frame 1301. The third reduction motor 1401 is fixedly installed on the top of the side of the fixed frame 1301. The lead screw nut 1403 is transmission-connected to the outside of the second lead screw 1402 and the translation plate 1404 is fixedly connected to the outside of the lead screw nut 1403. The middle part of the translation plate 1404 is fixed. The guide rod is connected, and the guide rod is horizontally passed through the inside of the fixed frame 1301 near the blade 1305, which can ensure that the guide rod moves in the horizontal direction and has a limiting effect on the translation plate 1404 and the screw nut 1403, so that the screw nut 1403 can only move horizontally along the outside of the second screw 1402, so that the translation plate 1404 drives the rotating ring 1405 below to move horizontally along the outside of the rotating rod 1303 to adjust the insertion rod 1406; the rotating ring 1405 is embedded in the bottom end of the translation plate 1404 and is sleeved on the outside of the rotating rod 1303, which can ensure that the rotating ring 1405 can both The second reduction motor 1302 drives the rotating rod 1303 to rotate, which can drive the rotating block 1304 to rotate, thereby driving the insertion rod 1406 to do circular motion with the rotating rod 1303 as the axis; and the third reduction motor 1401 drives the second lead screw 1402 to rotate, which can drive the external The lead screw nut 1403 moves laterally, thereby driving the rotating ring 1405 and the insertion rod 1406 to move laterally through the translation plate 1404, which can facilitate the adjustment of the depth of the insertion rod 1406 into the blade 1305, thereby adjusting the position of the insertion rod 1406 according to the required length; when the position of the insertion rod 1406 is fixed, the second reduction motor 1302 drives the rotating rod 1303 and the rotating block 1304 to rotate 180 degrees clockwise, thereby driving the blade 1305 connected thereto to rotate in the clockwise direction through the insertion rod 1406, and retracting this part of the blade 1305 so that it does not participate in the bending.

[0037] The blade fixing assembly 15 includes a support frame 1501, a first cylinder 1502, a spring rod 1503 and a rotating clamping plate 1504. The support frame 1501 is fixedly connected to the top of the fixing frame 1301 at a position vertically corresponding to the blade 1305, and the fixed cylinder body of the first cylinder 1502 is rotatably connected to the top of the support frame 1501. Both sides of the fixed cylinder body of the first cylinder 1502 are connected to the spring rod 1503 by bolts. The spring rod 1503 can exert an inward pulling force on the top of the rotating clamping plate 1504, so that the bottom end of the rotating clamping plate 1504 is away from the fixing frame 1301. In the state, the top of the rotating clamping plate 1504 is hinged to the end of the movable rod body of the first cylinder 1502 and the two spring rods 1503, the middle part of the rotating clamping plate 1504 is rotatably connected to the end of the support frame 1501 away from the fixed frame 1301 and the bottom end can be clamped with the blade 1305. When the blade adjustment component 14 drives the blade 1305 to be retracted upward, the movable rod body of the first cylinder 1502 can be controlled to extend outward through the external air circuit, so that the bottom end of the rotating clamping plate 1504 is rotated inward and clamped with the slot on the blade 1305, thereby fixing the retracted blade 1305.

[0038] The blades 1305 in the first blade adjustment mechanism and the second blade adjustment mechanism have two different thicknesses. The number of blades 1305 in the first blade adjustment mechanism is twice the number of blades 1305 in the second blade adjustment mechanism, and the thickness of the blades 1305 in the first blade adjustment mechanism is half the thickness of the blades 1305 in the second blade adjustment mechanism. The overall thickness of the multiple blades 1305 in the first blade adjustment mechanism is the same as the overall thickness of the multiple blades 1305 in the second blade adjustment mechanism. The length of the pressing blade on the corresponding side can be adjusted separately according to the different lengths of the left and right sides of the middle of the workpiece. The two ends can be adjusted independently, and the blades 1305 with different thicknesses on both sides can achieve two adjustment accuracies, which is more convenient for fine-tuning the overall length of the pressing blade involved in bending, so that the mechanism can perform more fine bending on the workpiece.

[0039] Both ends of the mounting frame 2 away from the screw slider connection mechanism are provided with a limit clamping mechanism that can limit and fix the first blade adjustment mechanism and the second blade adjustment mechanism. The limit clamping mechanism includes a second cylinder 16, a rotating lever 17, a rotating shaft 18 and a clamping block 19. The fixed cylinder body of the second cylinder 16 is rotatably connected to the end of the upper surface of the mounting frame 2 and the end of the movable rod body is rotatably connected to the rotating lever 17. The outer side of the rotating shaft 18 is sleeved with a fixed block and the fixed block is fixedly connected to the lower surface of the mounting frame 2. The rotating shaft 18 is horizontally rotatably connected to the inside of the fixed block and one end of it is fixedly connected to the bottom end of the rotating lever 17 through a spline. The clamping block 19 is fixedly connected to the end of the rotating shaft 18 away from the rotating lever 17 and corresponds to the blade 1305 on the same side and can be clamped with the corresponding blade 1305. The positioning clamping mechanisms correspond to the first blade adjustment mechanism and the second blade adjustment mechanism respectively and are symmetrically arranged with the vertical center line of the mounting frame 2 as the axis of symmetry; when the blades 1305 on both sides are adjusted, the blade 1305 involved in the bending is in the position corresponding to the movable pressing knife 5. At this time, the movable rod body of the second cylinder 16 can be extended to push the rotating lever 17 to rotate, and the clamping block 19 can be driven to rotate through the rotating shaft 18, so that the bottom end of the clamping block 19 is rotated in the direction close to the blade 1305. The bottom end of the clamping block 19 is provided with a buckle structure, and the portion of the blade 1305 corresponding to the buckle structure is also provided with a matching buckle groove. When the bottom end of the clamping block 19 is rotated to the position where it fits with the blade 1305, it can be clamped into the buckle groove, so that the blade 1305 can be fastened, thereby fixing the blade 1305.

[0040] The first blade adjustment mechanism and the second blade adjustment mechanism are both provided with a movable pressing knife 5 slidably connected to the pressing slide rail 3 on the side away from the fixed pressing knife 4. The side of the movable pressing knife 5 is provided with a connecting mechanism that can connect adjacent movable pressing knives 5 to each other. The connecting mechanism includes a third cylinder 20, a latch 21, a connecting pin 22 and a pin hole 23. The third cylinder 20 is fixedly connected to the top of the movable pressing knife 5 near the side of the horizontal moving mechanism and the end of its movable rod body is fixedly connected with the latch 21. The connecting pin 22 is fixedly connected to the top of the side where the movable pressing knife 5 and the adjacent movable pressing knife 5 are close to each other and a pin hole 23 is provided at the end thereof that is adapted to the latch 21. The top of the movable pressing knife 5 is provided with a socket 24 corresponding to the connecting pin 22 on the side of the adjacent movable pressing knife 5 and the connecting pin 22 on the adjacent movable pressing knife 5 can be inserted in the socket 24. The latch 21 is arranged inside the socket 24 and can be inserted into the pin hole 23 at the end of the connecting pin 22 inside it, so that multiple movable pressing knives 5 can be tightly connected into a whole.

[0041] The outside of the top of the screw slider connection mechanism is fixedly connected to a movable slide 6 and a knife pressing push-pull mechanism for adjusting the position of the movable knife pressing 5 is provided at one end of the lower surface of the movable slide 6 away from the screw slider connection mechanism. The knife pressing push-pull mechanism includes a fourth cylinder 25, a push-pull plate 26, a second push-pull knife pressing 27 and a fifth cylinder 28. The fixed cylinder body of the fourth cylinder 25 is horizontally fixedly installed on the lower surface of the movable slide 6 and the end of the movable rod body is fixedly connected to the push-pull plate 26. The second push-pull knife pressing 27 is fixedly connected to the bottom end of the push-pull plate 26 and is slidably connected to the knife pressing slide rail 3 and corresponds horizontally to the movable knife pressing 5. The fixed cylinder body of the fifth cylinder 28 is fixedly installed on the push-pull plate 26 away from the second One side of the push-pull press knife 27 and the end of its movable rod body are also fixedly connected with a pin 21. The top of the side of the second push-pull press knife 27 is also provided with a socket 24 corresponding to the connecting pin 22 on the movable press knife 5. The pin 21 at the movable end of the fifth cylinder 28 can be inserted into the pin hole 23 of the connecting pin 22 on the adjacent movable press knife 5. When the movable rod body of the fourth cylinder 25 is extended, it can drive the second push-pull press knife 27 to move to the side away from the fixed press knife 4 through the push-pull plate 26, thereby driving the movable press knife 5 connected to it through the connecting mechanism to move synchronously, so as to facilitate the separation of the movable press knife 5 that does not participate in bending from the movable press knife 5 that participates in bending, without affecting the bending work.

[0042] There are two screw slider connection mechanisms and two press knife push-pull mechanisms, and the two screw slider connection mechanisms and press knife push-pull mechanisms are symmetrically arranged with the vertical center line of the connecting plate 1 as the symmetry axis. The lateral moving mechanisms on both sides can independently control the screw slider connection mechanism and the press knife push-pull mechanism on the same side, and the first blade adjustment mechanism and the second blade adjustment mechanism can also be adjusted independently. It can be used to adjust the overall length of the blades 1305 and the movable press knife 5 on both sides when bending asymmetric workpieces on both sides, so as to facilitate the adjustment of the lengths of the press knives involved in the bending on both sides to different lengths, which is more convenient for use when bending different workpieces.

[0043] The first reduction motor 7, the second reduction motor 1302 and the third reduction motor 1401 are all electrically connected to the external control unit and are electrically connected to the external circuit through wires. The first cylinder 1502, the second cylinder 16, the third cylinder 20, the fourth cylinder 25 and the fifth cylinder 28 are all connected to the external air circuit through the air pipe, and their activity states can be controlled separately by the external air circuit.

[0044] A method for operating an automatic tool arrangement mechanism for a press tool on a bending center comprises the following steps:

[0045] 1. In the initial state, all the blades 1305 on both sides are in a downward pressing state, corresponding to the movable pressing blades 5 on both sides, and the second push-pull pressing blades 27 on both sides are in a state of moving away from each other and separated from the movable pressing blade 5. The first push-pull pressing blade 11 and the movable pressing blade 5 are connected to each other through a connecting mechanism; when the width of the bent workpiece changes, it is necessary to automatically arrange the length of the upper pressing blade of the bending machine. At this time, the first reduction motors 7 on both sides drive the first screw 8 to rotate, thereby driving the screw slider connecting mechanism as a whole, the mutually connected movable pressing blade 5 and the pressing blade push-pull mechanism to move left and right together, so that the screw slider connecting mechanism can abut against the blade 1305 on the same side;

[0046] Second, at the same time, the movable rod of the fourth cylinder 25 is retracted, driving the second push-pull pressing blades 27 on both sides to approach the adjacent movable pressing blade 5. At this time, the connecting pin 22 on the adjacent movable pressing blade 5 can be inserted into the insertion hole 24 on the side of the second push-pull pressing blade 27. Then, the movable rod of the fifth cylinder 28 on the second push-pull pressing blade 27 is extended, so that the pin 21 is inserted into the pin hole 23 on the connecting pin 22 of the adjacent movable pressing blade 5, thereby connecting the outer second push-pull pressing blade 27 and the adjacent movable pressing blade 5 together;

[0047] 3. Then, the movable rod of the third cylinder 20 on the movable pressing knife 5 at the appropriate length position matching the width of the workpiece to be bent is retracted, so that the corresponding latch 21 is disengaged from the connecting pin 22 of the adjacent movable pressing knife 5, and then the movable rod of the fourth cylinder 25 is pushed outward again, and the other movable pressing knives 5 connected thereto are driven to move away from the fixed pressing knife 4 through the push-pull plate 26 and the second push-pull pressing knife 27, so that the movable pressing knives 5 that do not need to participate in bending the plate are pulled outward together, while the inner movable pressing knife 5 forms a whole with the sheet knife 1305 and the fixed pressing knife 4;

[0048] Fourth, when the blade is spliced ​​after adjustment and the end of the movable pressing knife 5 corresponding to the edge of the workpiece cannot be completely aligned with the edge of the workpiece, the lateral position of the inserting rod 1406 can be adjusted by the blade adjusting assembly 14, so that the length of the inserting rod 1406 inserted into the blade 1305 is the same as the length of the movable pressing knife 5 extending beyond the edge of the workpiece, and then the blade rotating assembly 13 drives the inserting rod 1406 to rotate clockwise, and the part of the blade 1305 corresponding to the inserting rod 1406 is rotated 180 degrees along the rotating rod 1303, and the position of the rotated blade 1305 is fixed by the blade fixing assembly 15, so that the overall thickness of the blade 1305 can be adjusted;

[0049] 5. Then control the lateral movement mechanism again to drive the screw slider connection mechanism and the movable pressing knife 5 involved in the splicing to move to the side of the remaining blade 1305 involved in bending the workpiece and abut against the remaining blade 1305, so as to finely adjust the position of the movable pressing knife 5 involved in bending, so that the movable pressing knife 5 involved in bending can be accurately aligned with the edge of the workpiece, thereby enabling the mechanism to accurately bend the workpiece through the external control unit.

[0050] The above description is only for illustrating the present invention. It should be understood that the present invention is not limited to the above embodiments, and various variations that conform to the concept of the present invention are within the scope of protection of the present invention.

Claims

1. An automatic tool arrangement mechanism for a press tool on a bending center, comprising a connecting plate (1), a mounting frame (2) and a press tool slide rail (3), characterized in that: The mounting frame (2) is fixedly connected to the bottom end of the connecting plate (1) and the knife pressing slide rail (3) is fixedly connected to the lower surface of the mounting frame (2). Both sides of the middle part of the side of the connecting plate (1) are provided with a lateral movement mechanism and the movable end of the lateral movement mechanism is connected with a screw slider connection mechanism that can be laterally translated. A fixed knife pressing (4) is fixedly installed in the middle part of the lower surface of the knife pressing slide rail (3) and both sides of the fixed knife pressing (4) are respectively provided with a first knife adjusting mechanism and a second knife adjusting mechanism that can be finely adjusted. Both ends of the mounting frame (2) away from the screw slider connection mechanism are provided with a limiting clamping mechanism that can limit and fix the first knife adjusting mechanism and the second knife adjusting mechanism. The first knife adjusting mechanism and the second knife adjusting mechanism are fixed. A movable pressing knife (5) slidably connected to the pressing knife slide rail (3) is provided on the side of the movable pressing knife (5) away from the fixed pressing knife (4), and a connecting mechanism for connecting adjacent movable pressing knives (5) to each other is provided on the side of the movable pressing knife (5), and the connecting mechanism includes a third cylinder (20), a latch (21), a connecting pin (22) and a pin hole (23). The third cylinder (20) is fixedly connected to the top of the movable pressing knife (5) on the side close to the horizontal moving mechanism, and the end of the movable rod body is fixedly connected to the latch (21). The connecting pin (22) is fixedly connected to the top of the side where the movable pressing knife (5) and the adjacent movable pressing knife (5) are close to each other, and the end is provided with a pin hole (23) adapted to the latch (21). The top of the movable pressing knife (5) is provided with a A socket (24) corresponding to the connecting pin (22) on the side of the adjacent movable pressing knife (5) and the connecting pin (22) on the adjacent movable pressing knife (5) can be inserted into the socket (24), and the plug pin (21) is arranged inside the socket (24) and can be inserted into the pin hole (23) at the end of the connecting pin (22) inside it; the external part of the top of the screw slider connecting mechanism is fixedly connected to the movable slide seat (6) and the end of the lower surface of the movable slide seat (6) away from the screw slider connecting mechanism is provided with a pressing knife push-pull mechanism that can adjust the position of the movable pressing knife (5), and the pressing knife push-pull mechanism includes a fourth cylinder (25), a push-pull plate (26), a second push-pull pressing knife (27) and a fifth cylinder (28), and the fixed cylinder body of the fourth cylinder (25) is fixedly installed horizontally. A push-pull plate (26) is fixedly connected to the lower surface of the movable slide (6) and the end of the movable rod body. The second push-pull pressing knife (27) is fixedly connected to the bottom end of the push-pull plate (26) and is slidably connected to the pressing knife slide rail (3) and corresponds horizontally to the movable pressing knife (5). The fixed cylinder body of the fifth cylinder (28) is fixedly installed on the side of the push-pull plate (26) away from the second push-pull pressing knife (27) and the end of its movable rod body is also fixedly connected to a pin (21). The top of the side of the second push-pull pressing knife (27) is also provided with a socket (24) corresponding to the connecting pin (22) on the movable pressing knife (5). The pin (21) at the movable end of the fifth cylinder (28) can be inserted into the pin hole (23) of the connecting pin (22) on the adjacent movable pressing knife (5).

2. The automatic tool arrangement mechanism for the upper pressing tool of the bending center according to claim 1 is characterized in that: The first blade adjustment mechanism and the second blade adjustment mechanism have the same structure and are symmetrically arranged with the vertical center line of the connecting plate (1) as the symmetry axis, and both include a blade rotating assembly (13), a blade adjusting assembly (14) and a blade fixing assembly (15), wherein the blade rotating assembly (13) includes a fixing frame (1301), a second reduction motor (1302), a rotating rod (1303), a rotating block (1304) and a blade (1305), wherein the fixing frame (1301) is fixedly connected to the side of the connecting plate (1) and the second reduction motor (130 2) fixedly mounted on the bottom of the side of the fixed frame (1301), the rotating rod (1303) is connected to the output end of the second reduction motor (1302) through a spline and is rotatably connected to the bottom end inside the fixed frame (1301), the number of the blades (1305) is multiple, and the multiple blades (1305) are all attached to each other and sleeved on the end of the outside of the rotating rod (1303) away from the second reduction motor (1302), and the rotating block (1304) is fixedly mounted on the outside of the rotating rod (1303) and abuts against the blades (1305); The blade adjustment assembly (14) comprises a third reduction motor (1401), a second lead screw (1402), a lead screw nut (1403), a translation plate (1404), a rotating ring (1405) and an insertion rod (1406), wherein the second lead screw (1402) is connected to the output end of the third reduction motor (1401) via a spline and is rotatably connected to the top of the fixed frame (1301), and the third reduction motor (1401) is fixedly mounted on the fixed frame (1301). 301) on the top of the side, the screw nut (1403) is transmission-connected to the outside of the second screw (1402) and the translation plate (1404) is fixedly connected to the outside of the screw nut (1403), the rotating ring (1405) is embedded in the bottom end of the translation plate (1404) and sleeved on the outside of the rotating rod (1303), and the insertion rod (1406) is fixedly connected to the movable end of the rotating ring (1405) and inserted into the side of the blade (1305); The blade fixing assembly (15) comprises a support frame (1501), a first cylinder (1502), a spring rod (1503) and a rotating clamping plate (1504), wherein the support frame (1501) is fixedly connected to a position of the top end of the fixing frame (1301) vertically corresponding to the blade (1305), and the fixed cylinder body of the first cylinder (1502) is rotatably connected to the top of the support frame (1501), both sides of the fixed cylinder body of the first cylinder (1502) are connected to the spring rods (1503) by bolts, the top end of the rotating clamping plate (1504) is hinged to the movable rod body of the first cylinder (1502) and the ends of the two spring rods (1503), the middle part of the rotating clamping plate (1504) is rotatably connected to an end of the support frame (1501) away from the fixing frame (1301), and the bottom end can be clamped with the blade (1305).

3. The automatic tool arrangement mechanism for the upper pressing tool of the bending center according to claim 2 is characterized in that: The number of blades (1305) in the first blade adjustment mechanism is twice the number of blades (1305) in the second blade adjustment mechanism, and the thickness of the blades (1305) in the first blade adjustment mechanism is half the thickness of the blades (1305) in the second blade adjustment mechanism, and the overall thickness of the multiple blades (1305) in the first blade adjustment mechanism is the same as the overall thickness of the multiple blades (1305) in the second blade adjustment mechanism.

4. The automatic tool arrangement mechanism for the upper pressing tool of the bending center according to claim 1 is characterized in that: The lateral movement mechanism comprises a first reduction motor (7) and a first lead screw (8), wherein the first lead screw (8) is connected to the output end of the first reduction motor (7) via a spline, and the first reduction motor (7) is fixedly mounted on the side of the connecting plate (1).

5. The automatic tool arrangement mechanism for the upper pressing tool of the bending center according to claim 4 is characterized in that: The screw slider connection mechanism includes a screw slider (9), a connecting seat (10) and a first push-pull pressing knife (11), wherein the screw slider (9) is connected to the outside of the first screw (8) through a threaded transmission and the connecting seat (10) is fixedly connected to the bottom of the screw slider (9), the first push-pull pressing knife (11) is fixedly connected to the bottom end of the connecting seat (10) and is laterally slidably connected to the pressing knife slide rail (3) and horizontally corresponds to the fixed pressing knife (4) and the movable pressing knife (5), and the movable slide (6) is horizontally fixedly connected to the outside of the screw slider (9).

6. The automatic tool arrangement mechanism for the upper pressing tool of the bending center according to claim 2 is characterized in that: The position-limiting clamping mechanism comprises a second cylinder (16), a rotating lever (17), a rotating shaft (18) and a clamping block (19), wherein the fixed cylinder body of the second cylinder (16) is rotatably connected to the end of the upper surface of the mounting frame (2) and the end of the movable rod body is rotatably connected to the rotating lever (17), the outer portion of the rotating shaft (18) is sleeved with a fixed block and the fixed block is fixedly connected to the lower surface of the mounting frame (2), the rotating shaft (18) is horizontally rotatably connected to the inside of the fixed block and one end thereof is fixedly connected to the bottom end of the rotating lever (17) through a spline, the clamping block (19) is fixedly connected to the end of the rotating shaft (18) away from the rotating lever (17) and corresponds to the blade (1305) on the same side and can be clamped with the corresponding blade (1305), the two position-limiting clamping mechanisms respectively correspond to the first blade adjustment mechanism and the second blade adjustment mechanism and are symmetrically arranged with the vertical center line of the mounting frame (2) as the symmetry axis.

7. The automatic tool arrangement mechanism for the upper pressing tool of the bending center according to claim 1 is characterized in that: The number of the screw slider connection mechanism and the knife pressing push-pull mechanism is two, and the two screw slider connection mechanisms and the knife pressing push-pull mechanism are symmetrically arranged with the vertical center line of the connecting plate (1) as the symmetry axis.

8. An operating method for the automatic tool arrangement mechanism for the upper press tool of the bending center according to any one of claims 1 to 7, characterized in that: The following steps are also included:

1. In the initial state, the first blade adjustment mechanism and the second blade adjustment mechanism on both sides are in a downward pressing state, corresponding to the movable pressing blades (5) on both sides, the pressing blade push-pull mechanisms on both sides are in a state of being away from each other and separated from the movable pressing blades (5), and the screw slider connection mechanism and the multiple movable pressing blades (5) on the same side are connected to each other through the connection mechanism; when the width of the workpiece to be bent changes, it is necessary to automatically arrange the length of the upper pressing blade of the bending machine, and at this time, the lateral moving mechanisms on both sides drive the screw slider connection mechanism, the mutually connected movable pressing blades (5) and the pressing blade push-pull mechanism to move left and right together, so that the screw slider connection mechanism on both sides can respectively abut against the first blade adjustment mechanism and the second blade adjustment mechanism; 2. Simultaneously, the knife pressing push-pull mechanisms on both sides are moved toward the adjacent movable knife pressing (5). When the knife pressing push-pull mechanisms abut against the adjacent movable knife pressing (5), the outer knife pressing push-pull mechanisms are connected to the adjacent movable knife pressing (5) through the connecting mechanism.

3. Then, the connecting mechanism on the movable pressing knife (5) at the appropriate length position matching the width of the workpiece to be bent is disengaged from the adjacent movable pressing knife (5), and then the pressing knife push-pull mechanism drives the other movable pressing knives (5) connected thereto to move in a direction away from the fixed pressing knife (4), so that the movable pressing knives (5) that do not need to participate in the bending of the plate are pulled to the outside, and the inner movable pressing knife (5) forms a whole with the first blade adjustment mechanism, the second blade adjustment mechanism and the fixed pressing knife (4); 4. When the adjustment is completed, if the end of the movable pressing knife (5) participating in the bending and corresponding to the edge of the workpiece cannot be completely aligned with the edge of the workpiece, the first knife adjusting mechanism and the second knife adjusting mechanism can be adjusted so that the overall length of the movable pressing knives (5) participating in the bending on both sides and the lead screw slider connecting mechanism after abutting with the first knife adjusting mechanism and the second knife adjusting mechanism can be completely aligned with the width of the workpiece, and the adjustment precision of the first knife adjusting mechanism and the second knife adjusting mechanism are different and can be adjusted independently, so as to facilitate more accurate adjustment of the spacing between the movable pressing knives (5) participating in the bending on both sides; 5. Then, the lateral moving mechanisms on both sides are controlled to drive the lead screw slider connecting mechanisms on both sides and the movable pressing knife (5) involved in the knife splicing to move to the side close to the first knife adjusting mechanism and the second knife adjusting mechanism and abut against them, thereby finely adjusting the position of the movable pressing knife (5) involved in the bending, so that the movable pressing knife (5) involved in the bending can be accurately aligned with the edge of the workpiece, thereby enabling the mechanism to accurately bend the workpiece through the external control unit.

Images