A telescopic pressure knife with a guiding structure

Abstract

This utility model discloses a telescopic pressure knife with a guide structure. By slidably setting the pressure knife head in the notch groove of the pressure knife plate, the telescopic movement is directly driven by a drive cylinder. This allows the pressure knife head to dynamically adjust its extension length according to actual needs during bending, forming a continuous and stable support for the inner wall of the sheet material, effectively avoiding the problem of crease deviation caused by insufficient support. The guide structure design, in which the cylinder piston rod axis coincides with the center line of the notch groove, ensures the accuracy and straightness of the telescopic movement of the pressure knife head, eliminates the influence of off-center load on the movement accuracy, and improves the reliability and service life of the action. In the initial state, the cutting edge of the pressure knife head is flush with the edge of the pressure knife plate, which not only ensures the overall flatness of the pressure knife plate but also allows the pressure knife head to accurately extend to key positions such as the end of the fold when needed. This effectively solves the technical problem that traditional fixed pressure knives cannot form effective pressure at the end of the fold, and significantly improves the accuracy and quality stability of sheet bending.

Description

Technical Field

[0001] This utility model relates to the field of automated processing equipment technology, and in particular to a telescopic pressure knife with a guiding structure. Background Technology

[0002] In sheet metal processing, bending equipment is widely used to bend and shape metal sheets and plastic sheets. Existing bending equipment typically adopts a fixed pressure knife structure, in which the pressure knife head is rigidly connected to the pressure knife plate. A drive device drives the pressure knife plate to press down as a whole, causing the sheet metal to undergo plastic deformation along the bending line.

[0003] However, this type of fixed pressure knife has the following technical defects in actual production: Firstly, insufficient support on the inner wall of the sheet metal leads to crease misalignment. Because the relative position of the pressure head and the pressure plate is fixed, it cannot be adjusted according to the bending depth. When pressure is applied to the sheet metal, the inner wall of the sheet metal lacks effective reverse support, resulting in uneven stress in the bending area. This easily causes the crease line to deviate from the predetermined position, affecting the forming accuracy.

[0004] Secondly, the problem of pressure failure at the end of the fold is particularly prominent. Especially at the end or corner of the bending area, due to the spatial structure limitation, the fixed pressure head is unable to fully hold the inner wall of the sheet material, and cannot form an effective pressure force in this critical area. This results in unclear fold lines, large deviations in forming angles, and even quality defects such as cracks and wrinkles at the end of the fold, which seriously restricts the yield rate and appearance quality of the product.

[0005] It is evident that existing technologies still need improvement and enhancement. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a telescopic pressure knife with a guide structure to solve one or more problems existing in the prior art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a telescopic pressing knife with a guiding structure, comprising a pressing plate, a driving cylinder, and a pressing head. A notch is provided at one corner of the pressing plate extending towards its center. The pressing head is slidably disposed within the notch. The driving cylinder is fixedly mounted on the pressing plate, and the piston rod of the driving cylinder is fixedly connected to the pressing head. The axis of the piston rod coincides with the center line of the notch. The cutting edge of the pressing head is flush with the edge of the pressing plate in the initial state.

[0008] In one embodiment of the present invention, the tip of the pressing head extends outward to form a cutting head, which is used to hold the right-angled edge of the material.

[0009] In one embodiment of the present invention, guide strips are provided on the inner walls of the opposite sides of the notch along its length, and guide grooves that slide with the guide strips are provided on the corresponding sides of the pressing head.

[0010] In one embodiment of the present invention, the bottom surface of the pressure plate is provided with a first wedge-shaped inclined surface, and the cutting edge of the pressure head is provided with a second wedge-shaped inclined surface, wherein the inclination direction of the first wedge-shaped inclined surface and the second wedge-shaped inclined surface are consistent.

[0011] In one embodiment of the present invention, the pressing head is connected to the piston rod of the driving cylinder via a connecting seat. The connecting seat includes a mounting plate and a rib plate. The mounting plate is vertically fixed to the side wall of the pressing head. The rib plate is fixedly connected to the mounting plate and the pressing head respectively. The end of the piston rod is fixedly connected to the mounting plate via fasteners.

[0012] In one embodiment of the present invention, a mounting groove is provided on the top surface of the pressure plate, and the mounting groove is used to fix the pressure plate to the drive assembly.

[0013] In one embodiment of this utility model, a buffer pad is provided at the connection between the end of the rod of the driving cylinder and the pressure head.

[0014] In one embodiment of this utility model, the buffer pad is made of polyurethane material with a thickness of 2-5mm.

[0015] As described above, the telescopic pressure knife with a guide structure of this utility model has the following beneficial effects: by slidably setting the pressure knife head in the notch groove of the pressure knife plate and using a drive cylinder for precise driving, a dynamic and stable pressing process is achieved. This structure allows the pressure knife head to actively extend and form continuous and effective resistance against the inner wall of the plate at key stages such as the beginning and end of bending, especially at the end of the fold where traditional pressure knives provide insufficient support. This ensures that the entire fold, including the end that is prone to deviation, receives uniform support, significantly improving the accuracy and consistency of bending. At the same time, its integrated and compact design ensures a flat and uniform profile with the contour of the pressure knife plate when not in use, combining functionality and structural rationality. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1A schematic diagram of the telescopic pressure knife with a guide structure provided by this utility model; Figure 2 Another structural schematic diagram of the telescopic pressure knife with a guide structure provided by this utility model; Figure 3 A partial structural diagram of the telescopic pressure knife with a guide structure provided by this utility model; Figure 4 This is a partial structural diagram of the telescopic pressure knife with a guide structure provided by this utility model.

[0018] Component designation explanation 1. Pressure plate; 2. Drive cylinder; 3. Pressure head; 4. Notch groove; 5. Cutter head; 6. Guide bar; 7. Guide groove; 8. First wedge-shaped inclined surface; 9. Second wedge-shaped inclined surface; 10. Connecting seat; 11. Mounting plate; 12. Rib plate; 13. Mounting groove. Detailed Implementation

[0019] This utility model provides a telescopic pressure knife with a guiding structure. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. In the description of this utility model, it should be understood that the terms "up, down, left, right," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and should not be construed as limiting this utility model; in addition, the terms "installation," "connection," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] Please see Figures 1 to 4 This utility model provides a telescopic pressure knife with a guide structure, including a pressure plate 1, a drive cylinder 2, and a pressure head 3. A notch 4 is provided on one corner of the pressure plate 1 extending towards its center area. The pressure head 3 is slidably disposed in the notch 4. The drive cylinder 2 is fixedly installed on the pressure plate 1, and the piston rod of the drive cylinder 2 is fixedly connected to the pressure head 3. The axis of the piston rod coincides with the center line of the notch 4. The cutting edge of the pressure head 3 is flush with the edge of the pressure plate 1 in the initial state.

[0021] The tip of the pressure head 3 extends outward to form a blade head 5, which is used to hold the right-angled edge of the material. It can be understood that when the pressure head 3 is extended by the cylinder, the blade head 5 can insert into and abut against the root area of ​​the right-angled edge of the material to be bent. Through this concentrated point or line contact, stronger and more localized support can be provided at the end of the bending process, ensuring that the corners of the material are firmly pressed down, forming a clear right-angled crease.

[0022] Guide strips 6 are provided on the inner walls of opposite sides of the notch groove 4 along its length, and guide grooves 7 are provided on the corresponding sides of the pressing head 3 to slide and engage with the guide strips 6. Specifically, a raised guide strip 6 is installed or machined on each of the left and right inner walls of the notch groove 4, and the direction of the guide strip 6 is completely consistent with the length direction of the notch groove 4. Correspondingly, guide grooves 7 matching the shape of the guide strips 6 are precisely machined on the left and right sides of the pressing head 3 body. During assembly, the guide grooves 7 on the pressing head 3 are precisely engaged with the guide strips 6 of the notch groove 4. When the pressing head 3 moves, the engagement between the guide strips 6 and the guide grooves 7 ensures smooth sliding and effectively restricts the rotation or offset of the pressing head 3 in the horizontal plane, ensuring the accuracy and stability of the movement trajectory.

[0023] The bottom surface of the pressure plate 1 is provided with a first wedge-shaped inclined surface 8, and the cutting edge of the pressure head 3 is provided with a second wedge-shaped inclined surface 9. The inclination direction of the first wedge-shaped inclined surface 8 and the second wedge-shaped inclined surface 9 are consistent. When the pressure head 3 is in the initial state, the first wedge-shaped inclined surface 8 and the second wedge-shaped inclined surface 9 together form a continuous and complete wedge-shaped pressing surface. During bending operations, the continuous wedge-shaped inclined surface can be squeezed more smoothly between the sheet metal and the mold, and by utilizing the effect of the inclined surface, a tendency to push the sheet metal outward is generated while pressing vertically downward, thereby more effectively eliminating gaps, making the sheet metal fit tightly against the mold, and improving the bending quality.

[0024] The pressure head 3 is connected to the piston rod of the drive cylinder 2 via a connecting seat 10. The connecting seat 10 includes a mounting plate 11 and a stiffening plate 12. The mounting plate 11 is vertically fixed to the side wall of the pressure head 3, and the stiffening plate 12 is fixedly connected to both the mounting plate 11 and the pressure head 3. The end of the piston rod is fixedly connected to the mounting plate 11 via fasteners. The mounting plate 11 is vertically fixed to one side wall of the pressure head 3 by welding or screws. Then, a triangular stiffening plate 12 is welded at the angle between the mounting plate 11 and the side wall of the pressure head 3, serving as a reinforcing rib and greatly enhancing the rigidity and bending moment resistance of the connection. Finally, the end of the piston rod of the drive cylinder 2 is fastened to the mounting plate 11 through a threaded hole or by bolt penetration. This structure effectively disperses and transmits the thrust of the cylinder, avoiding stress concentration at a small connection point of the pressure head 3, and improving the durability of the entire mechanism.

[0025] The top surface of the pressure plate 1 has a mounting groove 13, which is used to fix the pressure plate 1 to the drive assembly. The mounting groove 13 can be a T-slot, a dovetail groove, or a standard interface groove with threaded holes. As a key part for external connection, the mounting groove 13 allows the entire pressure unit to be quickly and accurately clamped onto an external drive mechanism (such as a robotic arm, a slide module, etc.) using bolts, pins, or other quick-change devices. The presence of the mounting groove 13 simplifies the assembly process, improves system integration efficiency, and ensures that the pressure plate 1 maintains a stable posture and repeatability under different working conditions.

[0026] A buffer pad is provided at the connection between the rod end of the drive cylinder 2 and the pressure head 3. The buffer pad can be installed below the head of the fastener or as a shim between the two connecting surfaces. When the cylinder drives the pressure head 3 to the end of its stroke, the buffer pad can absorb some of the impact energy through its own elastic deformation, thereby reducing rigid collisions between metal parts, reducing noise and vibration, and extending the service life of the cylinder and the pressure head 3. Specifically, the buffer pad is made of polyurethane material with a thickness of 2-5 mm. Polyurethane has excellent wear resistance, elasticity, and impact resistance, making it an ideal choice as a buffer element. At the same time, limiting the thickness of the pad to between 2 and 5 mm ensures that the pad has sufficient deformation space to provide effective buffering, while avoiding excessive thickness that would occupy too much structural space or affect the effective stroke of the piston rod.

[0027] In summary, the telescopic pressure knife with a guide structure of this utility model, by extending a notch 4 from one corner of the pressure knife plate 1 towards the center area, and slidably setting the pressure knife head 3 within the notch 4, and cooperating with the fixed connection between the drive cylinder 2 and the pressure knife head 3, and aligning the piston rod axis of the drive cylinder 2 with the center line of the notch 4, and ensuring that the cutting edge of the pressure knife head 3 is flush with the edge of the pressure knife plate 1 in the initial state, forms a highly efficient support structure adapted to the bending requirements of sheet metal. It effectively solves the problems of insufficient support for the inner wall of sheet metal and easy deviation of creases in existing bending equipment. Especially for the special area at the end of the fold, by using the drive cylinder 2 to drive the pressure knife head 3 to slide along the notch 4, the pressure knife head 3 can be adaptively adjusted according to the spatial position of the end of the fold, thereby forming a tight and stable effective support with the inner wall of the sheet metal, avoiding forming defects such as wrinkles and warping at the end of the fold. Meanwhile, the flush blade design in its initial state ensures good contact between the pressure cutter and the sheet metal during the initial stage of operation. Combined with the guiding effect of the notch groove 4 on the sliding of the pressure cutter head 3, this further guarantees the accuracy of the pressure cutter head 3's movement, thereby ensuring that the crease forms along the preset path, improving the dimensional accuracy and appearance quality of the sheet metal bending, and reducing scrap rate and production costs. Furthermore, this telescopic structure can adapt to the processing needs of sheets of different specifications and fold lengths, breaking the limitations of fixed-structure pressure cutters on the applicability of bending equipment, enhancing the equipment's versatility and practicality, and providing a reliable guarantee for the efficient and high-quality implementation of sheet metal bending processes. Therefore, this utility model effectively overcomes the various shortcomings of existing technologies and has high industrial application value.

[0028] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of this utility model.

Claims

1. A telescopic pressure knife with a guiding structure, characterized in that, The device includes a pressure plate (1), a drive cylinder (2), and a pressure head (3). A notch (4) is provided on one corner of the pressure plate (1) extending towards its center. The pressure head (3) is slidably disposed in the notch (4). The drive cylinder (2) is fixedly mounted on the pressure plate (1), and the piston rod of the drive cylinder (2) is fixedly connected to the pressure head (3). The axis of the piston rod coincides with the center line of the notch (4). The cutting edge of the pressure head (3) is flush with the edge of the pressure plate (1) in the initial state.

2. The telescopic pressure knife with a guide structure according to claim 1, characterized in that, The tip of the pressure head (3) extends outward to form a blade head (5), which is used to hold the right-angled edge of the material.

3. The telescopic pressure knife with a guide structure according to claim 1, characterized in that, Guide strips (6) are provided on the inner walls of the opposite sides of the notch (4) along its length direction, and guide grooves (7) are provided on the corresponding sides of the pressure head (3) to slide with the guide strips (6).

4. The telescopic pressure knife with a guide structure according to claim 1, characterized in that, The bottom surface of the pressure plate (1) is provided with a first wedge-shaped inclined surface (8), and the cutting edge of the pressure head (3) is provided with a second wedge-shaped inclined surface (9). The inclination directions of the first wedge-shaped inclined surface (8) and the second wedge-shaped inclined surface (9) are consistent.

5. The telescopic pressure knife with a guide structure according to claim 1, characterized in that, The pressure head (3) is connected to the piston rod of the drive cylinder (2) through the connecting seat (10). The connecting seat (10) includes a mounting plate (11) and a rib plate (12). The mounting plate (11) is vertically fixed to the side wall of the pressure head (3). The rib plate (12) is fixedly connected to the mounting plate (11) and the pressure head (3) respectively. The end of the piston rod is fixedly connected to the mounting plate (11) through fasteners.

6. The telescopic pressure knife with a guide structure according to claim 5, characterized in that, The top surface of the pressure plate (1) is provided with a mounting groove (13), which is used to fix the pressure plate (1) to the drive assembly.

7. The telescopic pressure knife with a guide structure according to claim 1, characterized in that, A buffer pad is provided at the connection between the rod end of the drive cylinder (2) and the pressure head (3).

8. The telescopic pressure knife with a guide structure according to claim 7, characterized in that, The buffer pad is made of polyurethane material with a thickness of 2-5mm.

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