A bending tool for sheet metal parts

Abstract

The utility model discloses a kind of bending cutters for sheet metal parts, by integrating multiple independent hard alloy tool bits modularly in an ultralong mounting groove, and reserve spare tool bit that can slide, the synergic promotion of maintenance efficiency and processing quality is realized.Its arc contact part can effectively disperse bending pressure, avoid scratching workpiece surface, significantly improve product appearance quality.More importantly, when any working tool bit wears or is damaged, without the cutter as a whole is taken down or disassembles adjacent tool bit, spare tool bit can be directly replaced to working position by sliding in mounting groove, online quick replacement is realized, maintenance time is greatly shortened, the continuity and high efficiency of production line are guaranteed.This integrated spare scheme not only reduces the management demand to scattered spare parts, but also makes the cutter have unprecedented quick response capability and use economy, fundamentally solve the industry pain point that long-size bending cutter is inconvenient to maintain.

Description

Technical Field

[0001] This utility model relates to the field of automated processing equipment technology, and in particular to a bending tool for sheet metal parts. Background Technology

[0002] Sheet metal bending is a crucial process in metal sheet processing. It involves applying pressure to the sheet metal using a specialized die, causing plastic deformation to create a part at a predetermined angle. The bending tool (or upper die) is one of the core tools for this process, and its performance directly affects processing efficiency and product quality.

[0003] In existing technologies, bending tools used for machining long sheet metal parts typically employ two structural forms. One is a monolithic tool, which uses a long strip of steel to machine the cutting edge. While this structure offers good rigidity, when the cutting edge wears down due to prolonged use or is accidentally damaged, the entire tool must be removed from the equipment for re-sharpening or replacement, resulting in long processing interruptions, high maintenance costs, and significant material waste.

[0004] Another type is the segmented combination cutter, which arranges multiple shorter cutter heads along the length and mounts them on the same tool holder. This method solves the problem of partial replacement of integral cutters to some extent. However, the existing segmented design still has obvious shortcomings: First, the mounting position of the cutter head on the tool holder is usually fixed. When a cutter head wears out and needs to be replaced, the machine must be stopped and adjacent cutter heads must be disassembled to remove it, which is cumbersome and also affects production efficiency; Second, the traditional cutter head edge shape makes line contact or sharp corner contact with the sheet metal during bending, which can easily leave indentations or scratches on the surface of the sheet metal, affecting the appearance quality of the product.

[0005] Furthermore, in actual production, to cope with sudden tool head damage, operators usually prepare separate spare tool heads next to the machine tool. However, in emergency replacements, finding and retrieving spare tool heads prolongs downtime, and storing and managing separate tool heads is also inconvenient. Therefore, existing technology still needs 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 bending tool for sheet metal parts 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 bending tool for sheet metal parts, comprising: a long strip-shaped mounting tool holder, wherein a mounting groove is formed on the front side of its bottom along the length direction; a plurality of carbide cutting heads, arranged along the length direction of the mounting groove and detachably mounted in the mounting groove; each carbide cutting head includes a blade body and a cutting head located on the front side of the blade body, wherein the cutting edge of the cutting head is provided with an arc-shaped contact portion; wherein at least one of the plurality of carbide cutting heads is a spare cutting head, the length of the mounting groove is greater than the sum of the lengths of all working cutting heads, and the spare cutting head can slide to the working position within the mounting groove.

[0008] In one embodiment of this utility model, a receiving groove is provided on the blade body, and a first mounting hole is provided in the receiving groove through which the blade extends longitudinally. A second mounting hole is provided on the mounting blade holder, and the second mounting hole extends through the mounting blade holder and is aligned with the first mounting hole. A screw passes through the first mounting hole and the second mounting hole to fix the carbide cutting tip to the mounting blade holder.

[0009] In one embodiment of the present invention, the mounting groove is disposed at the bottom of the mounting tool holder, and a chamfer is provided at the transition between the front side and the top of the mounting tool holder.

[0010] In one embodiment of this utility model, the bottom surface of the mounting tool holder is flush with the bottom surface of the carbide tool tip.

[0011] In one embodiment of the present invention, a fastening groove is further provided at the bottom of the mounting tool holder. The mounting groove and the fastening groove are respectively located on the front and rear sides of the mounting tool holder, and the mounting tool holder is fixed to the main body of the sheet metal bending equipment through the fastening groove.

[0012] In one embodiment of the present invention, the fastening groove is provided with a third mounting hole that penetrates the mounting tool holder, and a screw passes through the third mounting hole to fix the mounting tool holder to the body of the sheet metal bending device.

[0013] In one embodiment of this utility model, the radius of curvature of the arc-shaped contact portion is R0.5-R5mm.

[0014] As described above, the bending tool for sheet metal parts of this invention has the following advantages: By integrating multiple carbide cutting tips into the mounting slot of the elongated tool holder, convenient replacement and flexible configuration of the cutting tips are achieved. The design of the spare cutting tip allows for quick adjustment to the working position without stopping the machine to replace the entire tool, significantly improving production efficiency and processing continuity. The arc-shaped contact portion optimizes the stress state during bending, reduces material damage, and ensures high-quality bending results. Overall, this design not only reduces maintenance costs but also enhances adaptability to different sheet metal processing needs, bringing a more efficient and economical solution to the sheet metal processing industry. Attached Figure Description

[0015] 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.

[0016] Figure 1 A schematic diagram of the structure of the bending tool for sheet metal parts provided by this utility model; Figure 2 for Figure 1 Enlarged view of detail A in the middle; Figure 3 A schematic diagram of the hard alloy cutting head structure of the bending tool for sheet metal parts provided by this utility model.

[0017] Component designation explanation 1. Tool holder; 2. Mounting groove; 3. Carbide tip; 4. Tool body; 5. Tool head; 6. Contact part; 7. Receiving groove; 8. First mounting hole; 9. Second mounting hole; 10. Fastening groove; 11. Third mounting hole. Detailed Implementation

[0018] This utility model provides a bending tool for sheet metal parts. 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.

[0019] Please see Figures 1 to 3 This utility model provides a bending tool for sheet metal parts, including: a long strip-shaped mounting base 1, with a mounting groove 2 formed on the front side of its bottom along the length direction; a plurality of carbide cutting heads 3, arranged along the length direction of the mounting groove 2 and detachably mounted in the mounting groove 2; each carbide cutting head 3 includes a blade body 4 and a cutting head 5 located on the front side of the blade body 4, and the cutting edge of the cutting head 5 is provided with an arc-shaped contact part 6, thereby changing the traditional sharp corner line contact to a smooth arc surface contact.

[0020] One of the innovations of this invention is that at least one of the plurality of carbide cutting heads 3 is a spare cutting head. The length of the mounting groove 2 is greater than the sum of the lengths of all working cutting heads, allowing the spare cutting head to slide into the working position within the mounting groove 2. The ample space allows the spare cutting head to be freely stored within the mounting groove 2. When any working cutting head is worn or damaged, simply loosen the fixing device to slide the spare cutting head along the mounting groove 2 to the working position vacated by the worn cutting head. After tightening the fixing device, production can be resumed immediately, achieving rapid replacement without stopping the machine or with only a very short downtime.

[0021] The blade portion 4 is provided with a receiving groove 7, and a first mounting hole 8 is provided in the receiving groove 7, extending longitudinally. A second mounting hole 9 is correspondingly provided on the mounting tool holder 1, penetrating the mounting tool holder 1 and aligned with the first mounting hole 8. A screw passes through the first mounting hole 8 and the second mounting hole 9 to fix the carbide cutting tip 3 to the mounting tool holder 1. Specifically, a recessed receiving groove 7 is machined on the blade portion 4 of each carbide cutting tip 3. One purpose of the receiving groove 7 is to provide countersunk space for the mounting screw, preventing the screw head from protruding and interfering. A first mounting hole 8 is machined at the bottom of the receiving groove 7, penetrating the blade portion 4 vertically. Correspondingly, a second mounting hole 9 is pre-machined on the body of the mounting tool holder 1 for the mounting position of each cutting tip. When the carbide cutting tip 3 is placed in the predetermined position of the mounting groove 2, its first mounting hole 8 will be precisely aligned with the second mounting hole 9 on the mounting tool holder 1. When fixing, a single screw is used, which is passed sequentially through the first mounting hole 8 on the cutter head and the second mounting hole 9 on the cutter holder 1, and finally screwed into the device or a nut. By tightening the screw, the carbide cutter head 3 can be firmly pressed into the mounting groove 2, so that when disassembling a single cutter head, other parts do not need to be disturbed, making the operation very simple.

[0022] The mounting groove 2 is located at the bottom of the mounting tool holder 1. The front side and top of the mounting tool holder 1 are chamfered at the transition point. That is, a chamfer is machined at the edge where the front side and top of the mounting tool holder 1 intersect. The chamfer plays a key role in the bending process, which can prevent the sharp edge of the mounting tool holder 1 from interfering with the pressure plate of the sheet metal bending machine or the sheet metal part itself, ensuring that the bending action can be carried out smoothly and expanding the applicable process range of the tool.

[0023] The bottom surface of the mounting tool holder 1 is flush with the bottom surface of the carbide cutting head 3, meaning that the bottom surface of the mounting tool holder 1 and the bottom surface of the carbide cutting head 3 should be on the same horizontal plane. This ensures that the force applied by the cutting tool to the sheet metal part is evenly distributed during bending, avoiding problems such as stress concentration, workpiece surface indentation, or uneven tool force caused by uneven bottom surfaces, thus improving processing quality and tool life.

[0024] The bottom of the mounting tool holder 1 is also provided with a fastening groove 10. The mounting groove 2 and the fastening groove 10 are located on the front and rear sides of the mounting tool holder 1, respectively. The mounting tool holder 1 is fixed to the body of the sheet metal bending equipment through the fastening groove 10. Optionally, the fastening groove 10 is provided with a third mounting hole 11 that penetrates the mounting tool holder 1. A screw passes through the third mounting hole 11 to fix the mounting tool holder 1 to the body of the sheet metal bending equipment. During fixing, the screw is passed downward through this third mounting hole 11 and directly screwed into the pre-set threaded hole on the body of the sheet metal bending equipment, or it is locked with a nut. By tightening the screw, the mounting tool holder 1 can be firmly pressed onto the equipment body by the structure of the fastening groove 10, and the connection is stable and reliable.

[0025] The radius of curvature of the arc-shaped contact portion 6 is R0.5-R5mm. This range covers a variety of application scenarios, from precision small bends to larger size bends, ensuring that the arc-shaped contact portion 6 can effectively protect the workpiece surface while meeting different process requirements.

[0026] In summary, the bending tool for sheet metal parts of this utility model, from the perspective of structural adaptability and ease of use, provides a stable and regular mounting base for multiple carbide cutting heads 3 by the mounting groove 2 opened along the length direction on the front side of the bottom of the long strip-shaped mounting tool holder 1. At the same time, the cutting head adopts a detachable mounting method, which, compared with the traditional fixed mounting cutting head, eliminates the need for complicated disassembly procedures when maintaining or partially replacing the cutting head, greatly improving the convenience of cutting head replacement and reducing the time cost required for tool maintenance. To ensure processing continuity and service life, at least one spare tool is included among the multiple carbide tool tips 3, and the length of the mounting groove 2 is greater than the sum of the lengths of all working tool tips, allowing the spare tool tip to slide into the working position within the mounting groove 2. This design effectively solves the problem of traditional tools requiring machine downtime for replacement once a working tool tip is damaged due to the lack of a spare tool tip, ensuring the continuity of sheet metal bending processing and improving overall processing efficiency. At the same time, the carbide material itself has high hardness and wear resistance, which effectively extends the service life of the tool tips compared to traditional tool materials, reducing tool replacement frequency and operating costs. From the perspective of improving sheet metal processing quality, each carbide cutting tip 3 has an arc-shaped contact portion 6 at its cutting edge 5. Compared to traditional right-angle or acute-angle cutting edges, this increases the contact area with the sheet metal during bending, preventing excessive local pressure that could cause indentations or cracks on the sheet metal surface. This effectively improves the surface quality and forming pass rate of the bent sheet metal, meeting higher standards for sheet metal processing. Overall, this cutting tool, through structural optimization, achieves synergistic advantages in improving processing efficiency, reducing operating costs, and ensuring processing quality, better adapting to the actual production needs of the sheet metal processing field. Therefore, this utility model effectively overcomes the various shortcomings of existing technologies and has high industrial application value.

[0027] 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 bending tool for sheet metal parts, characterized in that, include: The long strip-shaped mounting knife holder (1) has a mounting groove (2) on the front side of its bottom along the length direction; Multiple carbide cutting heads (3) are arranged along the length of the mounting groove (2) and detachably installed in the mounting groove (2); each carbide cutting head (3) includes a blade body (4) and a cutting head (5) located in front of the blade body (4), and the cutting edge of the cutting head (5) is provided with an arc-shaped contact part (6). Among the plurality of carbide cutting heads (3), at least one is a spare cutting head. The length of the mounting groove (2) is greater than the sum of the lengths of all working cutting heads. The spare cutting head can slide to the working position within the mounting groove (2).

2. The bending tool for sheet metal parts according to claim 1, characterized in that, The blade part (4) is provided with a receiving groove (7), and a first mounting hole (8) is provided in the receiving groove (7) through which the blade penetrates longitudinally. A second mounting hole (9) is provided on the mounting tool holder (1). The second mounting hole (9) penetrates the mounting tool holder (1) and is aligned with the first mounting hole (8). A screw passes through the first mounting hole (8) and the second mounting hole (9) to fix the carbide cutting head (3) on the mounting tool holder (1).

3. The bending tool for sheet metal parts according to claim 1, characterized in that, The mounting groove (2) is located at the bottom of the mounting knife holder (1), and the front side and top of the mounting knife holder (1) are chamfered.

4. The bending tool for sheet metal parts according to claim 3, characterized in that, The bottom surface of the mounting holder (1) is flush with the bottom surface of the carbide cutting head (3).

5. The bending tool for sheet metal parts according to claim 4, characterized in that, The bottom of the mounting tool holder (1) is also provided with a fastening groove (10). The mounting groove (2) and the fastening groove (10) are located on the front and rear sides of the mounting tool holder (1), respectively. The mounting tool holder (1) is fixed to the main body of the sheet metal bending equipment through the fastening groove (10).

6. The bending tool for sheet metal parts according to claim 5, characterized in that, The fastening groove (10) is provided with a third mounting hole (11) that penetrates the mounting knife holder (1). The screw passes through the third mounting hole (11) to fix the mounting knife holder (1) to the body of the sheet metal bending equipment.

7. The bending tool for sheet metal parts according to claim 1, characterized in that, The radius of curvature of the arc-shaped contact part (6) is R0.5-R5mm.

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