Telescopic avoidance clamping knife set, adaptive clamping device and bending equipment

Abstract

This application provides a telescopic avoidance clamping knife assembly, an adaptive clamping device, and a bending device, comprising: a clamping knife body extending along a first direction and having a basic clamping knife head; a telescopic knife head disposed on a first side of the clamping knife body along a second direction, movable along the first direction so that the telescopic knife head can be engaged or misaligned with the basic clamping knife head along the second direction, wherein the second direction is perpendicular or inclined to the first direction; a first drive mechanism disposed on the clamping knife body and connected to the telescopic knife head; an avoidance knife head disposed on a second side of the clamping knife body along the second direction, movable up and down relative to the clamping knife body so that the avoidance knife head can switch between an engagement position and an avoidance position; and a second drive mechanism disposed on the clamping knife body and connected to the avoidance knife head. This simplifies the structure of the telescopic avoidance clamping knife assembly, the adaptive clamping device, and the bending device.

Description

Technical Field

[0001] This application relates to the field of metal sheet bending technology, and in particular to a telescopic avoidance clamping knife set, an adaptive clamping device, and a bending equipment. Background Technology

[0002] Bending equipment is a specialized piece of equipment used for bending thin metal sheets and is widely used in the field of metal sheet forming.

[0003] When using bending equipment, the sheet metal is typically first clamped by an adaptive clamping device, and then bent by the bending device. For sheets of different lengths, the clamping blades of the adaptive clamping device need to be aligned along a straight line to ensure that the clamping range of the device can adapt to the length of the sheet metal. In addition, the adaptive clamping device also has an avoidance function: when the sheet metal needs to be bent into a complex structure that includes both vertical and horizontal folds (i.e., the bending edge extends vertically first and then folds horizontally), the clamping blade head can actively avoid the horizontal fold during the retraction process after bending, thereby ensuring smooth retraction of the device.

[0004] However, the avoidance function of existing adaptive clamping devices usually relies on the alternating and coordinated operation of two different drive mechanisms: a servo drive mechanism and a cylinder. This not only increases the structural complexity of the device but also makes its operation and control more difficult. Summary of the Invention

[0005] This application provides a telescopic avoidance clamping knife assembly, an adaptive clamping device, and a bending device to solve the problems existing in related technologies. The technical solution is as follows: In a first aspect, embodiments of this application provide a telescopic avoidance clamping knife assembly, including: A clamping knife body extends along a first direction, a basic clamping knife head is provided at a first end of the clamping knife body along the first direction, and a second end of the clamping knife body along the first direction is used to connect with a knife holder; A telescopic cutter head is disposed on the first side of the clamping cutter body along the second direction. The telescopic cutter head can move along the first direction so that the telescopic cutter head can be engaged or misaligned with the base clamping cutter head along the second direction. The second direction is perpendicular or inclined to the first direction. A first driving mechanism is disposed on the clamping knife body, and the output end of the first driving mechanism is connected to the telescopic knife head to drive the telescopic knife head to move. An obstacle avoidance cutter head is disposed on the second side of the clamping cutter body along a second direction. The obstacle avoidance cutter head is movable up and down relative to the clamping cutter body, so that the obstacle avoidance cutter head can switch between an assembly station and an obstacle avoidance station; and A second drive mechanism is disposed on the clamping knife body, and the output end of the second drive mechanism is connected to the avoidance knife head to drive the avoidance knife head to move. When the clearance cutter head is in the assembly position, the clearance cutter head and the base clamping cutter head are assembled together along the second direction to jointly clamp the non-bending part of the workpiece to be bent. When the avoidance cutter head is in the avoidance position, at least a portion of the avoidance cutter head is located below the base clamping cutter head, and the projection of the avoidance cutter head in the first direction at least partially overlaps with the projection of the base clamping cutter head in the first direction, so as to shorten the sum of the lengths of the avoidance cutter head and the base clamping cutter head in the second direction, so that the avoidance cutter head can avoid the bending portion extending along the second direction on the bent workpiece along the first direction.

[0006] In one embodiment, the clamping knife body is provided with a first guide groove, which extends along the movement trajectory of the avoidance knife head; The second drive mechanism includes: A first linear motion mechanism is disposed on the clamping knife body; A first connecting shaft is slidably disposed on the clamping knife body along the first direction. The first connecting shaft is connected to the output end of the first linear motion mechanism. The first end of the first connecting shaft passes through the avoidance knife head, and the first connecting shaft and the avoidance knife head are clearance-fitted so that the avoidance knife head can rotate around the first connecting shaft. The first guide wheel is rotatably disposed on the first end of the first connecting shaft and is slidably inserted into the first guide groove. The clearance cutter head is provided with a rotatable second guide wheel, which is closer to the base clamping cutter head than the first guide wheel, and the second guide wheel is slidably inserted into the first guide groove.

[0007] In one embodiment, the second drive mechanism further includes: The second connecting shaft has its first end connected to the output end of the first linear motion mechanism. A connecting member is slidably disposed on the clamping knife body, the first end of the connecting member is connected to the second end of the second connecting shaft, and the second end of the connecting member is connected to the first connecting shaft; An elastic element, the first end of which is connected to the clamping knife body, and the second end of which is connected to the second connecting shaft, the elastic element is used to provide driving force to the avoidance knife head so that the avoidance knife head is held on the assembly station.

[0008] In one embodiment, the first guide groove includes a first guide segment and a second guide segment. The first guide segment extends along a first direction, and the second guide segment communicates with the first guide segment. The second guide segment is closer to the first end of the clamping knife body along the first direction than the first guide segment. The second guide segment is arc-shaped, and the center of the second guide segment is located on the side close to the base clamping knife head. And / or, the clamping knife body also has a second guide groove extending along the second direction, and the second end of the first connecting shaft opposite to its first end is slidably inserted into the second guide groove.

[0009] In one embodiment, the clamping knife body further has a first limiting groove and a second limiting groove, the first limiting groove is connected to the second limiting groove, the first limiting groove and the second limiting groove are arranged along the first direction, the second limiting groove and the basic clamping knife head are arranged along the second direction, and the second limiting groove penetrates the second side wall and the first end bottom wall of the clamping knife body along the second direction. The clearance cutter head is provided with a connecting part, which is rotatably sleeved on the outside of the first connecting shaft. The connecting part connects the first guide wheel and the second guide wheel. When the clearance cutter head is in the assembly position, the connecting part cooperates with the first limiting groove, and the clearance cutter head cooperates with the second limiting groove to restrict the clearance cutter head to the assembly position.

[0010] In one embodiment, the clamping knife body further has a third guide groove that extends along the moving direction of the telescopic knife head; The first driving mechanism includes: The second linear motion mechanism is disposed on the clamping knife body; The third connecting shaft is connected to the output end of the second linear motion mechanism so that the third connecting shaft can move along the first direction with the output end of the second linear motion mechanism. The first end of the third connecting shaft passes through the telescopic cutter head. The third connecting shaft and the telescopic cutter head are clearance-fitted so that the telescopic cutter head can rotate around the third connecting shaft. The third guide wheel is rotatably disposed on the first end of the third connecting shaft and is slidably inserted into the third guide groove; The telescopic cutter head is provided with a rotatable fourth guide wheel, which is spaced apart from the third guide wheel, and the fourth guide wheel is slidably inserted into the third guide groove.

[0011] In one embodiment, the third guide groove includes a third guide segment and a fourth guide segment. The third guide segment extends along a first direction, and the fourth guide segment communicates with the third guide segment. The fourth guide segment is closer to the first end of the clamping knife body along the first direction than the third guide segment, and the fourth guide segment is arc-shaped.

[0012] In one embodiment, the clamping blade body has a built-in piston rod, which is capable of telescopic movement on the side wall of the base clamping blade head near the telescopic blade head; the telescopic blade head has a force-receiving groove, so that when the first driving mechanism drives the telescopic blade head to move to engage with the base clamping blade head, a portion of the piston rod extends and inserts into the force-receiving groove.

[0013] Secondly, embodiments of this application provide an adaptive clamping device, including the aforementioned telescopic avoidance clamping knife assembly.

[0014] Thirdly, embodiments of this application provide a bending device, including the aforementioned telescopic avoidance clamping knife assembly.

[0015] The advantages or beneficial effects of the above technical solutions include at least the following: In the technical solution adopted in this application, the basic clamping cutter head and the avoidance cutter head can be used as the essential cutter heads for the clamping process of the telescopic avoidance cutter group, while the telescopic cutter head serves as the length adjustment cutter head for adjusting the clamping process of the telescopic avoidance cutter group. Specifically, by setting the basic clamping cutter head, the telescopic cutter head, and the avoidance cutter head on the clamping cutter body, the smallest unit for adjusting the length of the clamping part of the clamping cutter body is refined from the entire cutter to a single telescopic cutter head. The operator can flexibly select whether the telescopic cutter head, the basic clamping cutter head, and the avoidance cutter head are simultaneously engaged or misaligned along the second direction, according to the actual dimensions of the non-bending part (the part requiring clamping) of the workpiece to be bent. When engaged, the telescopic cutter head, the basic clamping cutter head, and the avoidance cutter head form a clamping part with a first length along the second direction; when misaligned, the basic clamping cutter head and the avoidance cutter head engage to form a clamping part with a second length along the second direction. Therefore, the length of the clamping part along the second direction is adjustable, allowing the clamping range of the clamping part to adapt to workpieces of different lengths to be bent.

[0016] Based on this, since the avoidance cutter head is movably configured, under the drive of the second drive mechanism, the avoidance cutter head can switch between the assembly station and the avoidance station by moving with the output end of the second drive mechanism. When the avoidance cutter head is in the assembly station, the avoidance cutter head can be arranged sequentially with the basic clamping cutter head along the second direction and participate in the clamping process together; when the avoidance cutter head is in the avoidance station, at least a portion of the avoidance cutter head is located below the basic clamping cutter head, and the projection of the avoidance cutter head in the first direction overlaps at least partially with the projection of the basic clamping cutter head in the first direction, so as to shorten the sum of the lengths of the avoidance cutter head and the basic clamping cutter head in the second direction, that is, to shorten the length of the clamping part in the second direction. This allows the clamping part to avoid the bending part extending along the second direction on the bent workpiece along the first direction (perpendicular to the second direction), so that after the bending is completed, the clamping part can exit the bent workpiece without obstruction along the first direction, avoiding interference with the bending part.

[0017] Based on the above structure, this telescopic avoidance clamping knife set is suitable for complex structures that require bending workpieces into shapes that simultaneously include a bending portion extending along a first direction (such as a vertical fold) and a bending portion extending along a second direction (such as a horizontal fold), as well as simple structures that only include one type of bending portion, thus significantly improving the applicability of the telescopic avoidance clamping knife set. More importantly, the avoidance knife head only requires one set of second drive mechanisms to switch between the assembly station and the avoidance station, which effectively simplifies the structural complexity of the telescopic avoidance clamping knife set, the adaptive clamping device using the telescopic avoidance knife set, and the bending equipment, while also reducing the difficulty of operation and control.

[0018] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of this application will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0019] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0020] Figure 1 This is a three-dimensional structural diagram of the telescopic avoidance clamping knife assembly of the present invention from a first perspective, wherein the avoidance knife head is in the assembly position and the telescopic knife head is in the extension position (i.e., the selected position). Figure 2 This is a three-dimensional structural diagram of the telescopic avoidance clamping knife assembly of the present invention from a second perspective, wherein the avoidance knife head is in the assembly position; Figure 3 This is an exploded view of the telescopic avoidance clamping knife assembly of the present invention from a second perspective. Figure 4 This is a three-dimensional structural diagram of the telescopic avoidance clamping knife assembly of the present invention from a third-person perspective, wherein the avoidance knife head is in the assembly position; Figure 5 This is an exploded view of the telescopic avoidance clamping knife assembly of the present invention from a third-person perspective, wherein the avoidance knife head is in the assembly position; Figure 6 This is a three-dimensional structural diagram of the telescopic avoidance clamping knife assembly of the present invention from a first perspective, wherein the avoidance knife head is in the avoidance position and the telescopic knife head is in the retracted position (i.e., the unselected position). Figure 7 This is a three-dimensional structural diagram of the telescopic avoidance clamping knife assembly of the present invention from a second perspective, wherein the avoidance knife head is in the avoidance position; Figure 8 This is a three-dimensional structural diagram of the adaptive clamping device of the present invention.

[0021] Figure Labels 3. Clamping blade body; 31. Basic clamping blade head; 32. Clearance blade head; 321. Connecting part; 33. Second drive mechanism; 331. First linear motion mechanism; 332. First connecting shaft; 333. First guide wheel; 334. Second connecting shaft; 335. Connecting component; 336. Elastic element; 34. First guide groove; 341. First guide section; 342. Second guide section; 35. Second guide wheel; 36. First limiting groove; 37. Second limiting groove 38. Telescopic cutter head; 381. Force groove; 39. First drive mechanism; 391. Second linear motion mechanism; 392. Third connecting shaft; 393. Third guide wheel; 310. Third guide groove; 3101. Third guide section; 3102. Fourth guide section; 320. Fourth guide wheel; 330. Slide groove; 340. Fourth guide groove; 4. Piston rod; 41. Rod body; 42. Floating piston; 9. Drive motor; 10. Transmission gear; 20. Tool holder. Detailed Implementation

[0022] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0023] See Figures 1-7 This illustration shows a telescopic avoidance clamping knife assembly according to a preferred embodiment of the present invention, comprising: The clamping knife body 3 extends along a first direction. The first end of the clamping knife body 3 along the first direction is provided with a basic clamping knife head 31. The second end of the clamping knife body 3 along the first direction is used to connect with the knife holder 20 so as to install the clamping knife body 3 on the knife holder 20. The telescopic cutter head 38 is disposed on the first side of the clamping cutter body 3 along the second direction. The telescopic cutter head 38 can move along the first direction so that the telescopic cutter head 38 can be engaged with the base clamping cutter head 31 along the second direction (at which time the telescopic cutter head 38 is in the extended position) or misaligned with each other (at which time the telescopic cutter head 38 is in the retracted position). The second direction is perpendicular or inclined to the first direction. It can be understood that when the telescopic cutter head 38 and the base clamping cutter head 31 are engaged with each other along the second direction, the telescopic cutter head 38 and the base clamping cutter head 31 form a continuous clamping part with a first length. When the telescopic cutter head 38 and the base clamping cutter head 31 are misaligned with each other along the second direction, only the base clamping cutter head 31 forms a clamping part with a second length, which is less than the first length. Therefore, by controlling the telescopic cutter head 38 to extend and retract, the clamping cutter body 3 can have at least two clamping parts with different lengths, so that the telescopic avoidance cutter set can adapt to workpieces of different lengths to be bent. The first drive mechanism 39 is disposed on the clamping knife body 3. The output end of the first drive mechanism 39 is connected to the telescopic knife head 38 to drive the telescopic knife head 38 to move, thereby causing the telescopic knife head 38 to automatically switch between the extended position and the retracted position. The avoidance cutter head 32 is disposed on the second side of the clamping cutter body 3 along the second direction. The avoidance cutter head 32 can move up and down relative to the clamping cutter body 3, so that the avoidance cutter head 32 can switch between the assembly station and the avoidance station; and The second drive mechanism 33 is disposed on the clamping knife body 3, and the output end of the second drive mechanism 33 is connected to the avoidance knife head 32 to drive the avoidance knife head 32 to move. When the clearance cutter head 32 is in the assembly position, the clearance cutter head 32 and the base clamping cutter head 31 are assembled together along the second direction to jointly clamp the non-bending part of the workpiece to be bent. When the avoidance cutter head 32 is in the avoidance position, at least a portion of the avoidance cutter head 32 is located below the base clamping cutter head 31. The projection of the avoidance cutter head 32 in the first direction and the projection of the base clamping cutter head 31 in the first direction at least partially overlap, so as to shorten the sum of the lengths of the avoidance cutter head 32 and the base clamping cutter head 31 in the second direction, so that the avoidance cutter head 32 can avoid the bending portion extending along the second direction on the bent workpiece in the first direction.

[0024] Specifically, in the technical solution adopted in this application, the basic clamping cutter head 31 and the avoidance cutter head 32 can be used as the essential cutter heads for the clamping process of the telescopic avoidance cutter group, while the telescopic cutter head 38 serves as the length adjustment cutter head for adjusting the clamping process of the telescopic avoidance cutter group. By setting the basic clamping cutter head 31, the telescopic cutter head 38, and the avoidance cutter head 32 on the clamping cutter body 3, the smallest unit for adjusting the length of the clamping part of the clamping cutter body 3 is refined from the entire cutter to a single telescopic cutter head 38. According to the actual size of the non-bending part (the part requiring clamping) of the workpiece to be bent, the operator can flexibly select whether the telescopic cutter head 38 is simultaneously engaged or misaligned with the base clamping cutter head 31 and the avoidance cutter head 32 along the second direction. When engaged, the telescopic cutter head 38, the base clamping cutter head 31 and the avoidance cutter head 32 form a clamping part with a first length along the second direction. When misaligned, the base clamping cutter head 31 and the avoidance cutter head 32 are engaged to form a clamping part with a second length along the second direction. Thus, the length of the clamping part along the second direction can be adjusted, so that the clamping range of the clamping part can be adapted to workpieces of different lengths to be bent.

[0025] Based on this, since the avoidance cutter head 32 is movably configured, under the drive of the second drive mechanism 33, the avoidance cutter head 32 can switch between the assembly station and the avoidance station as the output end of the second drive mechanism 33 moves. When the avoidance cutter head 32 is in the assembly station, the avoidance cutter head 32 can be arranged sequentially with the base clamping cutter head 31 along the second direction and participate in the clamping process together; when the avoidance cutter head 32 is in the avoidance station, at least a portion of the avoidance cutter head 32 is located below the base clamping cutter head 31, and the projection of the avoidance cutter head 32 in the first direction overlaps at least partially with the projection of the base clamping cutter head 31 in the first direction, so as to shorten the sum of the lengths of the avoidance cutter head 32 and the base clamping cutter head 31 in the second direction, that is, to shorten the length of the clamping part in the second direction. This allows the clamping part to avoid the bending part extending along the second direction on the bent workpiece along the first direction (perpendicular to the second direction), so that after the bending is completed, the clamping part can exit the bent workpiece without obstruction along the first direction, avoiding interference with the bending part.

[0026] Based on the above structure, this telescopic avoidance clamping knife set is suitable for complex structures that require bending workpieces into shapes that simultaneously include a bending portion extending along a first direction (such as a vertical fold) and a bending portion extending along a second direction (such as a horizontal fold), as well as simple structures that only include one type of bending portion, thus significantly improving the applicability of the telescopic avoidance clamping knife set. More importantly, the avoidance knife head 32 only requires one set of second drive mechanisms 33 to switch between the assembly station and the avoidance station, which effectively simplifies the structural complexity of the telescopic avoidance clamping knife set, the adaptive clamping device using the telescopic avoidance knife set, and the bending equipment, while also reducing the difficulty of operation and control.

[0027] In practical applications, the first direction is the vertical direction and the second direction is the horizontal direction. The tool holder 20 is connected to the output end of the external drive device so that the tool holder 20 can move back and forth along the first direction with the output end of the external drive device, thereby enabling the telescopic avoidance clamping tool set to clamp the workpiece to be bent before bending and to release the workpiece after bending.

[0028] See Figure 6 In practical applications, the first direction is defined as the vertical direction (e.g., Figure 6 The first direction is perpendicular to the second direction (i.e., the left-right direction). When the avoidance cutter head 32 is in the avoidance position, part of it is located directly below the base clamping cutter head 31, and the other part is located below the side of the base clamping cutter head 31 along the second direction away from the telescopic cutter head 38 (e.g., the vertical direction). Figure 6 (Lower left of the image). At this workstation, the projections of the avoidance cutter head 32 and the base clamping cutter head 31 in the second direction partially overlap.

[0029] Furthermore, in other embodiments, the relative position of the avoidance cutter head 32 between the avoidance station and the base clamping cutter head 31 can be flexibly adjusted according to the width of the bending portion to be avoided along the second direction. The goal is to shorten the length of the clamping portion in the second direction and ensure that the clamping portion avoids the bending portion extending along the second direction on the bent workpiece along the first direction, ultimately ensuring that the clamping portion can exit the bent workpiece without obstruction along the first direction.

[0030] See Figures 1-3 In one embodiment, the clamping knife body 3 is provided with a first guide groove 34, which extends along the movement trajectory of the avoidance knife head 32; The second drive mechanism 33 includes: The first linear motion mechanism 331 is mounted on the clamping knife body 3. The first connecting shaft 332 is slidably disposed on the clamping knife body 3 along the first direction. The sliding engagement between the first connecting shaft 332 and the clamping knife body 3 limits the movement trajectory of the first connecting shaft 332, thereby guiding the first connecting shaft 332 to make linear motion along the first direction. The first connecting shaft 332 is connected to the output end of the first linear motion mechanism 331, so that the first connecting shaft 332 can reciprocate along the first direction with the output end of the first linear motion mechanism 331. The first end of the first connecting shaft 332 passes through the avoidance knife head 32, and the first connecting shaft 332 and the avoidance knife head 32 are clearance-fitted, so that the avoidance knife head 32 can rotate around the first connecting shaft 332, ensuring that the avoidance knife head 32 can flexibly switch between the assembly station and the avoidance station. The first guide wheel 333 is rotatably disposed on the first end of the first connecting shaft 332 and is slidably inserted into the first guide groove 34, so that the first guide wheel 333 can slide along the first guide groove 34 as the first connecting shaft 332 moves. The clearance cutter head 32 is equipped with a rotatable second guide wheel 35. The second guide wheel 35 is closer to the base clamping cutter head 31 than the first guide wheel 333. The second guide wheel 35 is slidably inserted into the first guide groove 34. Under the driving action of the first connecting shaft 332, the clearance cutter head 32 drives the second guide wheel 35 on it to slide along the extension direction of the first guide groove 34, so as to guide the clearance cutter head 32 to move smoothly and stably along the set trajectory, and finally enable the clearance cutter head 32 to flexibly switch between the assembly station and the clearance station. Thus, when it is necessary to press the workpiece to be bent, the first linear motion mechanism 331 drives the first connecting shaft 332 to move along the first direction and away from the workpiece to be bent. Under the driving action of the first connecting shaft 332, the first guide wheel 333 slides along the extension direction of the first guide groove 34. At the same time, the avoidance cutter head 32 moves, so as to drive the second guide wheel 35 on the avoidance cutter head 32 to slide along the extension direction of the first guide groove 34. Under the guidance of the second guide wheel 35 and the first guide wheel 333, the avoidance cutter head 32 smoothly turns along the set trajectory until the avoidance cutter head 32 moves. The tool holder 20 moves to the assembly station, aligning the clearance cutter head 32 and the base clamping cutter head 31 along the second direction to form a clamping part. This clamping part moves with the tool holder 20 along the first direction towards the workpiece to be bent, clamping the workpiece and allowing the external bending device to bend it. When it is necessary to release the bent workpiece (after bending it to form the bent workpiece), the clamping part moves with the tool holder 20 along the first direction away from the workpiece by a set distance, creating sufficient clearance space between the clamping part and the workpiece. The clearance cutter head 32 is allowed to move freely within the clearance space. Then, the first linear motion mechanism 331 drives the first connecting shaft 332 to move along the second direction and towards the workpiece being bent. Under the driving action of the first connecting shaft 332, the first guide wheel 333 slides in the opposite direction along the extension direction of the first guide groove 34. Simultaneously, the clearance cutter head 32 moves in the opposite direction, causing the second guide wheel 35 on the clearance cutter head 32 to slide in the opposite direction along the extension direction of the first guide groove 34. Guided by the second guide wheel 35 and the first guide wheel 333, the clearance cutter head 32 smoothly rotates until it avoids... The cutter head 32 is moved to the avoidance position. Even if the avoidance cutter head 32 is located near the clamping end face of the base clamping cutter head 31 and is offset from the base clamping cutter head 31 in the second direction, the sum of the lengths of the avoidance cutter head 32 and the base clamping cutter head 31 in the second direction is shortened. This allows the avoidance cutter head 32 to avoid the bending portion extending in the second direction on the bent workpiece in the first direction, so that the clamping portion can exit the bent workpiece without obstruction in the first direction after bending (after the bending workpiece completes the bending process to form the bent workpiece), without interfering with the bending portion extending in the second direction on the bent workpiece.

[0031] The coordinated operation of the first linear motion mechanism 331, the first connecting shaft 332, the avoidance cutter head 32, the first guide wheel 333, the second guide wheel 35, and the first guide groove 34 enables the avoidance cutter head 32 to move smoothly and stably along a preset trajectory under the drive of the first linear motion mechanism 331. This ensures that the avoidance cutter head 32 can switch smoothly and stably between the assembly station and the avoidance station without the need for a complex intermediate transmission mechanism, thereby simplifying the structure and reducing the cost of the telescopic avoidance clamping cutter assembly.

[0032] Specifically, in this embodiment, the first linear motion mechanism 331 is a cylinder. Using a cylinder as the first linear motion mechanism 331 simplifies the overall structure and helps reduce manufacturing costs. Furthermore, the single cylinder structure is lightweight and does not significantly increase the load, thus improving the response speed and sensitivity of the clamping knife body 3, making it faster and more responsive during station switching or clamping actions. Of course, in other embodiments, the first linear motion mechanism 331 can also use a hydraulic cylinder, an electric push rod, or other linear motion components, or a combined linear motion device consisting of a motor and a lead screw and nut pair.

[0033] See Figures 1-3 In one embodiment, the second drive mechanism 33 further includes: The second connecting shaft 334 has its first end connected to the output end of the first linear motion mechanism 331, so that the second connecting shaft 334 can move along the first direction with the output end of the first linear motion mechanism 331. A connecting member 335 is slidably disposed on the fourth guide groove 340 of the clamping knife body 3. Through the slidable engagement between the connecting member 335 and the clamping knife body 3, the movement trajectory of the connecting member 335 is limited, thereby guiding the connecting member 335 to move linearly along the first direction. The first end of the connecting member 335 is connected to the second end of the second connecting shaft 334, and the second end of the connecting member 335 is connected to the first connecting shaft 332, so that the connecting member 335 can move with the second connecting shaft 334. The second end of the connecting member 335 is connected to the first connecting shaft 332, so that the first connecting shaft 332 can move with the connecting member 335 along the first direction. The elastic element 336 has its first end connected to the clamping blade body 3 and its second end connected to the second connecting shaft 334. The elastic element 336 provides driving force to the clearance cutter head 32, keeping it in the assembly position and preventing it from arbitrarily leaving the assembly position. When the first linear motion mechanism 331 drives the clearance cutter head 32 from the clearance position to the assembly position, the elastic element 336 provides auxiliary driving force to the clearance cutter head 32, cooperating with the first linear motion mechanism 331 to drive the clearance cutter head 32 to quickly reset. Furthermore, if the first linear motion mechanism 331 fails unexpectedly, the elastic element 336 can still independently drive the clearance cutter head 32 to reset smoothly and reliably keep it in the assembly position, ensuring that the clearance cutter head 32 can reliably clamp the workpiece to be bent, improving clamping reliability and stability.

[0034] See Figure 3 To facilitate the installation of the elastic element 336, in one embodiment, the elastic element 336 is a tension spring. One end of the tension spring is provided with a first hook, which is hooked onto the support part of the clamping knife body 3. The other end of the tension spring is provided with a second hook, which is hooked onto the second connecting shaft 334.

[0035] Of course, in other embodiments, the elastic element 336 can also be a common spring, sheet metal or other elastic component.

[0036] See Figure 3 In one embodiment, the first guide groove 34 includes a first guide section 341 and a second guide section 342. The first guide section 341 extends along a first direction, and the second guide section 342 communicates with the first guide section 341. The second guide section 342 is closer to the first end of the clamping knife body 3 along the first direction than the first guide section 341. The second guide section 342 is arc-shaped, and the center of the second guide section 342 is located on the side close to the base clamping knife head 31. Thus, when the avoidance cutter head 32 switches from the assembly station to the avoidance station, the first guide wheel 333 and the second guide wheel 35 first slide within the first guide section 341, guiding the avoidance cutter head 32 to move in a straight line away from the clamping cutter body 3 and away from the cutter holder 20, until sufficient clearance space is formed between the avoidance cutter head 32 and the base clamping cutter head 31. Then, the second guide wheel 35 slides to the second guide section 342, guiding the avoidance cutter head 32 to flip, until the avoidance cutter head 32 is located away from the cutter holder 20 and close to the base clamping cutter head 31, that is, the avoidance cutter head 32 is in the avoidance station.

[0037] In one embodiment, the clamping blade body 3 further has a second guide groove (not shown in the figure), which extends along a second direction. The second end of the first connecting shaft 332, opposite to its first end, is slidably inserted into the second guide groove. Thus, through the slidable engagement between the first end of the first connecting shaft 332 and the second guide groove, a slidable connection is achieved between the first connecting shaft 332 and the clamping blade body 3, defining the movement trajectory of the first connecting shaft 332 and guiding it to move linearly along the second direction.

[0038] See Figure 3 In one embodiment, the clamping knife body 3 further has a first limiting groove 36 and a second limiting groove 37. The first limiting groove 36 is connected to the second limiting groove 37. The first limiting groove 36 and the second limiting groove 37 are arranged along a first direction. The second limiting groove 37 and the basic clamping knife head 31 are arranged along a second direction. The second limiting groove 37 penetrates the second side wall and the first end bottom wall of the clamping knife body 3 along the second direction. The clearance cutter head 32 is provided with a connecting part 321, which is rotatably sleeved on the outside of the first connecting shaft 332. The connecting part 321 connects the first guide wheel 333 and the second guide wheel 35. When the clearance cutter head 32 is in the assembly position, the connecting part 321 cooperates with the first limiting groove 36, and a portion of the clearance cutter head 32 cooperates with the second limiting groove 37 to restrict the clearance cutter head 32 to the assembly position. This ensures that the clearance cutter head 32 can reliably press the workpiece to be bent, improving the reliability and stability of the pressing. The other part of the avoidance cutter head 32 extends out of the second limiting groove 37 through the opening between the second side wall and the bottom wall of the first end of the clamping cutter body 3 along the second direction; when the avoidance cutter head 32 is switched to the avoidance position, the projection of the avoidance cutter head 32 along the first direction coincides with the projection of the end of the clamping cutter body 3 away from the cutter along the first direction, or the projection of the avoidance cutter head 32 along the first direction is located within the projection of the end of the clamping cutter body 3 away from the cutter along the first direction, thereby reliably avoiding the bending portion extending along the second direction on the bending workpiece.

[0039] See Figures 4-5 In one embodiment, the clamping knife body 3 also has a third guide groove 310, which extends along the moving direction of the telescopic knife head 38. The first drive mechanism 39 includes: The second linear motion mechanism 391 is mounted on the clamping knife body 3. The third connecting shaft 392 is connected to the output end of the second linear motion mechanism 391 so that the third connecting shaft 392 can move along the first direction with the output end of the second linear motion mechanism 391. The first end of the third connecting shaft 392 passes through the telescopic cutter head 38. The third connecting shaft 392 and the telescopic cutter head 38 are in clearance fit so that the telescopic cutter head 38 can rotate around the third connecting shaft 392. The third guide wheel 393 is rotatably mounted on the first end of the third connecting shaft 392 and is slidably inserted into the third guide groove 310. The telescopic cutter head 38 is provided with a rotatable fourth guide wheel 320, which is spaced apart from the third guide wheel 393. The fourth guide wheel 320 is slidably inserted into the third guide groove 310. Thus, when it is necessary to increase the length of the pressing part along the second direction, the second linear motion mechanism 391 drives the third connecting shaft 392 to move, thereby causing the third guide wheel 393 to slide along the extension direction of the third guide groove 310, and driving the telescopic cutter head 38 to move, thereby causing the fourth guide wheel 320 on the telescopic cutter head 38 to slide in the third guide groove 310 until the telescopic cutter head 38 and the base pressing cutter head 31 are aligned and spliced ​​in the second direction; when it is necessary to reduce the length of the pressing part along the second direction, the second linear motion mechanism 391 drives the third connecting shaft 392 to move in the opposite direction, and the third guide wheel 393 moves with the third connecting shaft 392 to slide in the opposite direction along the third guide groove 310, thereby driving the telescopic cutter head 38 to move in the opposite direction, thereby causing the fourth guide wheel 320 to slide in the opposite direction in the third guide groove 310 until the telescopic cutter head 38 retracts to be misaligned with the base pressing cutter head 31 in the second direction.

[0040] The coordinated operation of the second linear motion mechanism 391, the third connecting shaft 392, the telescopic cutter head 38, the third guide wheel 393, the fourth guide wheel 320, and the third guide groove 310 enables the telescopic cutter head 38 to move smoothly and stably along a preset trajectory under the drive of the second linear motion mechanism 391. This ensures that the telescopic cutter head 38 can stably switch between the extended position and the retracted position without the need for a complex intermediate transmission mechanism, thereby simplifying the structure and reducing the cost of the telescopic avoidance clamping cutter assembly.

[0041] Specifically, in this embodiment, the second linear motion mechanism 391 is a cylinder. Using a cylinder as the second linear motion mechanism 391 simplifies the overall structure and helps reduce manufacturing costs. Furthermore, the single cylinder structure is lightweight and does not significantly increase the load, thus improving the response speed and sensitivity of the clamping knife body 3, making it faster and more responsive during station switching or clamping actions. Of course, in other embodiments, the second linear motion mechanism 391 can also use a hydraulic cylinder, an electric push rod, or other linear motion components, or a combined linear motion device consisting of a motor and a lead screw and nut pair.

[0042] See Figure 5 In one embodiment, the third guide groove 310 includes a third guide section 3101 and a fourth guide section 3102. The third guide section 3101 extends along a first direction, and the fourth guide section 3102 communicates with the third guide section 3101. The fourth guide section 3102 is closer to the first end of the clamping blade body 3 along the first direction than the third guide section 3101, and the fourth guide section 3102 is arc-shaped. Thus, when the telescopic blade head 38 switches from the retracted position to the extended position, the third guide wheel 393 and the fourth guide wheel 320 first slide within the third guide section 3101, guiding the telescopic blade head 38 to move in a straight line towards the base clamping blade head 31. Subsequently, the fourth guide wheel 320 slides to the fourth guide section 3102, guiding the telescopic blade head 38 to flip downwards until the telescopic blade head 38 aligns with the base clamping blade head 31. When the telescopic blade head 38 switches from the extended position to the retracted position, the third guide wheel 393 and the fourth guide wheel 320... First, the telescopic cutter head 38 slides within the fourth guide section 3102, guiding it to rotate upwards. Then, the third guide wheel 393 slides to the third guide section 3101, guiding the telescopic cutter head 38 to move in a straight line until it retracts towards the tool holder 20 and is misaligned with the base clamping cutter head 31. When the telescopic cutter head 38 is in the retracted position, it will not protrude relative to the clamping cutter body 3 along the third direction. The third direction is perpendicular to the first and second directions, preventing the telescopic cutter head 38 from interfering with other components when it retracts.

[0043] See Figures 4-7In one embodiment, the clamping cutter body 3 has a built-in piston rod 4, which can extend and retract on the side wall of the base clamping cutter head 31 near the telescopic cutter head 38. The telescopic cutter head 38 has a force-receiving groove 381, so that when the first drive mechanism 39 drives the telescopic cutter head 38 to move to engage with the base clamping cutter head 31, part of the piston rod 4 extends and inserts into the force-receiving groove 381. Through the cooperation of the piston rod 4 and the force-receiving groove 381, the telescopic cutter head 38 is locked in the extended position. This locking structure not only enables the telescopic cutter head 38 to stably participate in the engagement of the clamping part, but more importantly, during the clamping process, the reaction force generated by the clamping force acting on the telescopic cutter head 38 can be directly transmitted to the base clamping cutter head 31 through the piston rod 4, thereby preventing the reaction force from acting on the output end of the second linear motion mechanism 391. It not only balances the forces on the basic clamping cutter head 31 and the telescopic cutter head 38, but also effectively protects the second linear motion mechanism 391, significantly extending the service life of the second linear motion mechanism 391.

[0044] See Figure 5 In one embodiment, the piston rod 4 includes: a rod body 41, which is slidably inserted into the clamping knife body 3; and a floating piston 42, which is sleeved on the rod body 41 and forms a first cavity and a second cavity in the clamping knife body 3. The first cavity and the second cavity are respectively connected to an external air source so that by adjusting the air pressure of the first cavity and the second cavity, the floating piston 42 drives the rod body 41 to extend and retract.

[0045] Specifically, the technical solution adopted in this application provides a pneumatic structure for precise control of the piston rod 4. Specifically, the rod 41 is slidably inserted into the corresponding cavity of the clamping knife body 3. To ensure pneumatic performance, a sealing element (such as a sealing ring) can be provided between the rod 41 and the cavity wall to give the cavity good airtightness. A floating piston 42 is fixedly sleeved on the rod 41, dividing the cavity into a first cavity and a second cavity that are sealed to each other. By controlling the air pressure difference between the first cavity and the second cavity, the floating piston 42 can be driven to move the rod 41 in a telescopic motion.

[0046] Its working principle is as follows: when the air pressure in the first cavity is greater than the air pressure in the second cavity, the floating piston 42 is pushed towards the second cavity, thereby driving the rod 41 to move in the extension direction, so that the rod 41 extends from the clamping knife body 3 towards the side wall of the telescopic knife head 38; conversely, when the air pressure in the second cavity is greater than the air pressure in the first cavity, the floating piston 42 is pushed towards the first cavity, thereby driving the rod 41 to retract into the clamping knife body 3.

[0047] See Figure 8 A preferred embodiment of the present invention also provides an adaptive clamping device, including the aforementioned telescopic avoidance clamping blade assembly.

[0048] The adaptive clamping device of the present invention, by employing the aforementioned telescopic avoidance tool set, is applicable to both complex structures requiring workpiece bending that simultaneously include a bending portion extending in a first direction (such as a vertical fold) and a bending portion extending in a second direction (such as a transverse fold), and simple structures containing only one type of bending portion, thereby significantly improving the applicability of the adaptive clamping device. More importantly, the avoidance tool head 32 only requires one set of second drive mechanisms 33 to switch between the assembly station and the avoidance station, which effectively simplifies the structural complexity of the adaptive clamping device and reduces the difficulty of operation and control.

[0049] See Figure 8 In one embodiment, the adaptive clamping device of the present invention further includes: The tool holder 20 and the clamping tool body 3 are movably mounted on the tool holder 20 along the second direction.

[0050] In one embodiment, the clamping knife body 3 is provided with a sliding groove 330, which is slidably fitted onto the guide rail of the knife holder 20. The telescopic avoidance clamping knife assembly also includes: The drive motor 9 is connected to the clamping knife body 3 and is located above the slide groove 330; The transmission gear 10 is fixedly sleeved on the output shaft of the drive motor 9. The transmission gear 10 is used to mesh with the rack fixed on the guide rail so as to independently drive the clamping knife body 3 to slide on the knife holder 20. During operation, the drive motor 9 drives the transmission gear 10 to rotate, and through the meshing action of the rack, drives the clamping knife body 3 to move independently in the second direction.

[0051] A preferred embodiment of the present invention also provides a bending device, including the above-described telescopic avoidance clamping knife assembly.

[0052] The bending equipment of the present invention, by employing the aforementioned telescopic avoidance cutter set, is suitable for both complex structures requiring workpiece bending that simultaneously include a bending portion extending along a first direction (such as a vertical fold) and a bending portion extending along a second direction (such as a transverse fold), and simple structures containing only one type of bending portion, thereby significantly improving the applicability of the bending equipment. More importantly, the avoidance cutter head 32 only requires one set of second drive mechanisms 33 to switch between the assembly station and the avoidance station, which effectively simplifies the structural complexity of the bending equipment and reduces the difficulty of operation and control.

[0053] It is understood that the bending equipment can be either a bending machine or a bending center.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0055] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0056] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A telescopic avoidance clamping knife assembly, characterized in that, include: A clamping blade body extends along a first direction, and a basic clamping blade head is provided at a first end of the clamping blade body along the first direction; A telescopic cutter head is disposed on the first side of the clamping cutter body along the second direction. The telescopic cutter head can move along the first direction so that the telescopic cutter head can be engaged or misaligned with the base clamping cutter head along the second direction. The second direction is perpendicular or inclined to the first direction. A first driving mechanism is disposed on the clamping knife body, and the output end of the first driving mechanism is connected to the telescopic knife head to drive the telescopic knife head to move. An obstacle avoidance cutter head is disposed on the second side of the clamping cutter body along a second direction. The obstacle avoidance cutter head is movable up and down relative to the clamping cutter body, so that the obstacle avoidance cutter head can switch between an assembly station and an obstacle avoidance station; and A second drive mechanism is disposed on the clamping knife body, and the output end of the second drive mechanism is connected to the avoidance knife head to drive the avoidance knife head to move. When the clearance cutter head is in the assembly position, the clearance cutter head and the base clamping cutter head are assembled together along the second direction to jointly clamp the non-bending part of the workpiece to be bent. When the avoidance cutter head is in the avoidance position, at least a portion of the avoidance cutter head is located below the base clamping cutter head, and the projection of the avoidance cutter head in the first direction at least partially overlaps with the projection of the base clamping cutter head in the first direction, so as to shorten the sum of the lengths of the avoidance cutter head and the base clamping cutter head in the second direction, so that the avoidance cutter head can avoid the bending portion extending along the second direction on the bent workpiece along the first direction.

2. The telescopic avoidance clamping knife assembly according to claim 1, characterized in that, The clamping blade body is provided with a first guide groove, which extends along the movement trajectory of the avoidance blade head; The second drive mechanism includes: A first linear motion mechanism is disposed on the clamping knife body; A first connecting shaft is slidably disposed on the clamping knife body along the first direction. The first connecting shaft is connected to the output end of the first linear motion mechanism. The first end of the first connecting shaft passes through the avoidance knife head, and the first connecting shaft and the avoidance knife head are clearance-fitted so that the avoidance knife head can rotate around the first connecting shaft. The first guide wheel is rotatably disposed on the first end of the first connecting shaft and is slidably inserted into the first guide groove. The clearance cutter head is provided with a rotatable second guide wheel, which is closer to the base clamping cutter head than the first guide wheel, and the second guide wheel is slidably inserted into the first guide groove.

3. The telescopic avoidance clamping knife assembly according to claim 2, characterized in that, The second drive mechanism also includes: The second connecting shaft has its first end connected to the output end of the first linear motion mechanism. A connecting member is slidably disposed on the clamping knife body, the first end of the connecting member is connected to the second end of the second connecting shaft, and the second end of the connecting member is connected to the first connecting shaft; An elastic element, the first end of which is connected to the clamping knife body, and the second end of which is connected to the second connecting shaft, the elastic element is used to provide driving force to the avoidance knife head so that the avoidance knife head is held on the assembly station.

4. The telescopic avoidance clamping knife assembly according to claim 2, characterized in that, The first guide groove includes a first guide section and a second guide section. The first guide section extends along a first direction, and the second guide section communicates with the first guide section. The second guide section is closer to the first end of the clamping knife body along the first direction than the first guide section. The second guide section is arc-shaped, and the center of the second guide section is located on the side close to the base clamping knife head. And / or, the clamping knife body also has a second guide groove extending along the second direction, and the second end of the first connecting shaft opposite to its first end is slidably inserted into the second guide groove.

5. The telescopic avoidance clamping knife assembly according to claim 2, characterized in that, The clamping knife body also has a first limiting groove and a second limiting groove. The first limiting groove is connected to the second limiting groove. The first limiting groove and the second limiting groove are arranged along the first direction. The second limiting groove and the basic clamping knife head are arranged along the second direction. The second limiting groove penetrates the second side wall and the first end bottom wall of the clamping knife body along the second direction. The clearance cutter head is provided with a connecting part, which is rotatably sleeved on the outside of the first connecting shaft. The connecting part connects the first guide wheel and the second guide wheel. When the clearance cutter head is in the assembly position, the connecting part cooperates with the first limiting groove, and the clearance cutter head cooperates with the second limiting groove to restrict the clearance cutter head to the assembly position.

6. The telescopic avoidance clamping knife assembly according to claim 1, characterized in that, The clamping knife body also has a third guide groove, which extends along the moving direction of the telescopic knife head; The first driving mechanism includes: The second linear motion mechanism is disposed on the clamping knife body; The third connecting shaft is connected to the output end of the second linear motion mechanism so that the third connecting shaft can move along the first direction with the output end of the second linear motion mechanism. The first end of the third connecting shaft passes through the telescopic cutter head. The third connecting shaft and the telescopic cutter head are clearance-fitted so that the telescopic cutter head can rotate around the third connecting shaft. The third guide wheel is rotatably disposed on the first end of the third connecting shaft and is slidably inserted into the third guide groove. The telescopic cutter head is provided with a rotatable fourth guide wheel, which is spaced apart from the third guide wheel, and the fourth guide wheel is slidably inserted into the third guide groove.

7. The telescopic avoidance clamping knife assembly according to claim 6, characterized in that, The third guide groove includes a third guide section and a fourth guide section. The third guide section extends along a first direction, and the fourth guide section communicates with the third guide section. The fourth guide section is closer to the first end of the clamping knife body along the first direction than the third guide section, and the fourth guide section is arc-shaped.

8. The telescopic avoidance clamping knife assembly according to claim 6, characterized in that, The clamping blade body has a built-in piston rod, which can extend and retract on the side wall of the basic clamping blade head near the telescopic blade head; the telescopic blade head has a force groove, so that when the first driving mechanism drives the telescopic blade head to move to engage with the basic clamping blade head, part of the piston rod extends out and inserts into the force groove.

9. An adaptive clamping device, characterized in that, Includes the telescopic clearance clamping knife assembly as described in any one of claims 1-8.

10. A bending machine, characterized in that, Includes the telescopic clearance clamping knife assembly as described in any one of claims 1-8.

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