A workpiece positioning tool for a bending machine

Abstract

The utility model discloses a kind of bending machine workpiece positioning tool, including bending machine main body, the inside wall of bending machine main body one side is located at bending groove and is fixedly connected with mounting seat, one end of the mounting seat is fixedly connected with frame, the frame is equipped with screw rod type adjusting assembly, the movable end of the screw rod type adjusting assembly is fixedly connected with shell;The shell is equipped with self-locking type switching assembly, the movable end of the self-locking type switching assembly is fixedly connected with assembly seat, the top of the assembly seat is detachably fixedly connected with positioning mould.The utility model in, through screw rod type adjusting assembly realizes the accurate adjustment of positioning mould transversely, drive assembly seat rotation using self-locking type switching assembly, the working condition of two positioning grooves is automatically switched, cooperate contact switch real-time detection workpiece in place, constitute a set of efficient, accurate and high degree of automation positioning tool, especially suitable for the secondary bending processing of asymmetric shape workpiece.

Description

Technical Field

[0001] This utility model relates to the field of positioning tooling technology, and in particular to a workpiece positioning tooling for a bending machine. Background Technology

[0002] The workpiece positioning fixture for a bending machine, often simply referred to as a bending clamp or positioning mold, is an auxiliary device installed on the bending machine. Its core function is to quickly, accurately, and consistently position the metal sheet to be bent into the correct position on the mold, ensuring that the angle, size, and shape of each bend meet the design requirements.

[0003] Simply put, it is the "eyes and hands" of the bending operator, replacing the traditional method of relying on ruler measurement, line drawing, and manual visual positioning.

[0004] Currently, in the secondary or multiple bending production of non-standard bent hardware parts, when the shapes of the two ends of the workpiece are inconsistent, existing positioning fixtures typically require machining two fixed positioning slots for each end. During operation, workers must manually switch the positioning operation from using one positioning slot to using the other, making automatic switching of the positioning reference impossible and resulting in low processing efficiency. Furthermore, traditional positioning methods lack an effective in-situ detection mechanism; whether the workpiece is placed correctly relies entirely on the worker's experience, further increasing quality risks and affecting the consistency and smoothness of processing.

[0005] To address this, we propose a workpiece positioning fixture for bending machines. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of the existing technology and propose a workpiece positioning fixture for bending machines.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a workpiece positioning fixture for a bending machine, comprising a bending machine body, wherein a mounting base is fixedly connected to one side inner wall of the bending machine body at the bending groove, a frame is fixedly connected to one end of the mounting base, a screw-type adjustment component is mounted on the frame, and a housing is fixedly connected to the movable end of the screw-type adjustment component. The housing is equipped with a self-locking switching component. The movable end of the self-locking switching component is fixedly connected to an assembly base. The top of the assembly base is detachably fixedly connected to a positioning mold. The top two outer walls of the positioning mold are respectively provided with a first positioning groove and a second positioning groove. Both the first positioning groove and the second positioning groove have threaded holes extending to the bottom of the positioning mold at their inner bottoms, and both threaded holes are threaded with contact switches.

[0008] Furthermore, the outer surface of the frame is provided with a scale, which enables the reading and visual adjustment of the lateral position of the slide.

[0009] Furthermore, the screw-type adjustment assembly includes a handwheel, which is located at one end of the frame. A screw is fixedly connected to one side of the outer surface of the handwheel, and the screw passes through the frame and is rotatably connected to the frame. A slide is threaded onto the outer surface of the screw, and the slide is slidably connected to the frame and fixedly connected to the housing. The slide matches the scale. By driving the screw through the handwheel, the slide can be moved, thereby achieving stable and reliable adjustment of the lateral position of the positioning mold.

[0010] Furthermore, the self-locking switching component includes a motor, which is fixedly installed inside the housing. A worm gear is fixedly connected to the drive end of the motor, and a worm wheel is meshed with the outer surface of the worm gear. A support shaft is fixedly connected to the top of the worm wheel, and the support shaft passes through the housing and is fixedly connected to the mounting base. The support shaft is rotatably connected to the housing. By utilizing the self-locking characteristics of the worm gear transmission, the positioning mold can be reliably locked after rotating to any position, preventing deflection during processing.

[0011] Furthermore, the two positioning molds are fixed to the assembly base by multiple bolts. This connection method has a simple structure, is easy to disassemble and assemble, and facilitates the quick replacement of positioning molds of different specifications according to processing requirements, thereby improving the applicability of the tooling.

[0012] Furthermore, both of the aforementioned contact switches include threaded connectors, which are threadedly connected to threaded holes. A ball head is slidably fitted into the top of the threaded connector, and a spring is fixedly connected to the bottom of the ball head. A pressure sensor is provided at the bottom of the spring, and the detection end of the pressure sensor is fixed to the spring, while the mounting end of the pressure sensor is fixed to the threaded connector. This structure can adapt to different workpieces through spring buffering, and the pressure sensor generates a stable force-to-electricity conversion signal to accurately determine whether the workpiece is installed in place.

[0013] The beneficial effects of this utility model are: In use, this utility model achieves accurate lateral adjustment of the positioning mold through a screw-type adjustment component, drives the assembly base to rotate using a self-locking switching component, automatically switches the working state of the two positioning slots, and cooperates with a contact switch to detect the workpiece positioning in real time, thus forming a set of efficient, accurate and highly automated positioning fixtures, which are particularly suitable for secondary bending processing of asymmetrical workpieces. Attached Figure Description

[0014] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments 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.

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model; Figure 2 This is a partial three-dimensional structural schematic diagram of the present invention; Figure 3 This is a partial cross-sectional view of the present invention. Figure 4 For the present utility model Figure 3 Enlarged view of point A in the middle; Figure 5 For the present utility model Figure 3 Enlarged view of point B in the middle.

[0016] The attached figures are labeled as follows: 1. Bending machine body; 2. Positioning mold; 3. Handwheel; 4. Screw; 5. Second positioning groove; 6. Bolt; 7. First positioning groove; 8. Mounting base; 9. Scale; 10. Assembly base; 11. Frame; 12. Support shaft; 13. Slide; 14. Housing; 15. Ball head; 16. Threaded hole; 17. Spring; 18. Threaded joint; 19. Pressure sensor; 20. Motor; 21. Worm; 22. Worm wheel. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figures 1-5 As shown, a workpiece positioning fixture for a bending machine is disclosed, including a bending machine body 1. A mounting seat 8 is fixedly connected to one inner wall of the bending machine body 1 at the bending groove. The mounting seat 8 is fixed to the bending machine body 1 by fixing bolts, which facilitates the disassembly and replacement of the mounting seat 8.

[0019] A frame 11 is fixedly connected to one end of the mounting base 8. A screw-type adjustment assembly is mounted on the frame 11. A housing 14 is fixedly connected to the movable end of the screw-type adjustment assembly. A scale 9 is provided on the outer surface of the frame 11. The screw-type adjustment assembly includes a handwheel 3, which is located at one end of the frame 11. A screw 4 is fixedly connected to one side of the outer surface of the handwheel 3. The screw 4 passes through the frame 11 and is rotatably connected to the frame 11. A slide 13 is threaded onto the outer surface of the screw 4. The slide 13 is slidably connected to the frame 11 and fixedly connected to the housing 14. The slide 13 matches the scale 9. The helix angle of the screw 4 is less than the friction angle, which gives the screw 4 a self-locking ability and prevents it from shifting due to vibration or load. The outer surface of the handwheel 3 is provided with anti-slip texture to increase its surface friction and prevent slippage during use.

[0020] The housing 14 is equipped with a self-locking switching assembly. The movable end of the self-locking switching assembly is fixedly connected to the mounting base 10. The self-locking switching assembly includes a motor 20, which is fixedly installed inside the housing 14. The drive end of the motor 20 is fixedly connected to a worm 21. A worm wheel 22 is meshed with the outer surface of the worm 21. A support shaft 12 is fixedly connected to the top of the worm wheel 22. The support shaft 12 passes through the housing 14 and is fixedly connected to the mounting base 10. The support shaft 12 is rotatably connected to the housing 14. The worm 21 and the worm wheel 22 have a self-locking property. When the worm 21 does not rotate, the worm wheel 22 cannot rotate under the action of external force. The support shaft 12 and the housing 14 are rotatably connected through a bearing seat. The seat of the bearing seat is fixed to the housing 14. The inner ring of the bearing inside the bearing seat is fixedly sleeved on the outer surface of the support shaft 12.

[0021] The top of the assembly base 10 is detachably fixedly connected to a positioning mold 2. The top two outer walls of the positioning mold 2 are respectively provided with a first positioning groove 7 and a second positioning groove 5. The two positioning molds 2 are fixed to the assembly base 10 by multiple bolts 6. The assembly base 10 is provided with screw holes that match the bolts 6. The top of the positioning mold 2 is provided with a through hole that extends to the bottom. When the bolts 6 are installed, they pass through the through hole and connect with the screw hole to realize the installation of the positioning mold 2.

[0022] Both the first positioning groove 7 and the second positioning groove 5 have threaded holes 16 extending to the bottom of the positioning mold 2. Both threaded holes 16 are threadedly connected to contact switches. Both contact switches include threaded connectors 18, which are threadedly connected to the threaded holes 16. A ball head 15 is slidably fitted to the top of the threaded connector 18, and a spring 17 is fixedly connected to the bottom of the ball head 15. A pressure sensor 19 is provided at the bottom of the spring 17, and the detection end of the pressure sensor 19 is fixed to the spring 17. The mounting end of the pressure sensor 19 is fixed to the threaded connector 18. The model of the pressure sensor 19 is XCZ-100.

[0023] Working principle: The operator rotates handwheel 3 according to the bending dimension requirements of the workpiece, which drives screw 4 to rotate. The slide 13, which is threaded into screw 4, moves laterally within frame 11, thereby moving the entire housing 14, self-locking switching assembly, assembly base 10, and positioning mold 2, all fixed to slide 13, together. The operator can accurately adjust the lateral position of positioning mold 2 by observing the position of slide 13 on frame 11 with scale 9 to adapt to different bending requirements.

[0024] When bending is required at the other end of the workpiece, the positioning reference needs to be switched. The motor 20, fixed inside the housing 14, is started, driving the worm gear 21 to rotate. The worm gear 21 meshes with the worm wheel 22, transmitting motion to the support shaft 12 fixed to the worm wheel 22. The support shaft 12 rotates the mounting base 10 on its top and the positioning mold 2, fixed by bolts 6, by 180 degrees. This causes the first positioning slot 7 and the second positioning slot 5, originally in the working position, to interchange, achieving automatic switching of the positioning reference. The worm wheel 22 and worm gear 21 mechanism has a self-locking function, ensuring that the positioning mold 2 will not rotate due to external force in the non-drive state, guaranteeing the stability of the processing.

[0025] Both the first positioning groove 7 and the second positioning groove 5 have threaded holes 16 at their bottoms, each housing a contact switch. The contact switch consists of a threaded connector 18, a ball head 15, a spring 17, and a pressure sensor 19. When the workpiece is placed in the positioning groove, its weight presses the ball head 15 downwards, compressing the spring 17 and applying pressure to the pressure sensor 19. When the pressure value detected by the pressure sensor 19 reaches a preset threshold, it sends a signal to the bending machine control system, indicating that the workpiece is accurately positioned and bending operation is permitted. This design effectively avoids bending errors caused by the workpiece not being properly positioned.

[0026] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A workpiece positioning fixture for a bending machine, comprising a bending machine body (1), characterized in that: A mounting base (8) is fixedly connected to one side of the inner wall of the bending machine body (1) at the bending groove. A frame (11) is fixedly connected to one end of the mounting base (8). A screw-type adjustment component is installed on the frame (11). A housing (14) is fixedly connected to the movable end of the screw-type adjustment component. The housing (14) is equipped with a self-locking switching component. The movable end of the self-locking switching component is fixedly connected to an assembly base (10). The top of the assembly base (10) is detachably fixedly connected to a positioning mold (2). The top two outer walls of the positioning mold (2) are respectively provided with a first positioning groove (7) and a second positioning groove (5). The bottom of the first positioning groove (7) and the second positioning groove (5) are both provided with threaded holes (16) that extend to the bottom of the positioning mold (2), and the two threaded holes (16) are threaded with contact switches.

2. The workpiece positioning fixture for a bending machine according to claim 1, characterized in that: The outer surface of the frame (11) is provided with a scale (9).

3. The workpiece positioning fixture for a bending machine according to claim 2, characterized in that: The screw-type adjustment assembly includes a handwheel (3), which is located at one end of the frame (11). A screw (4) is fixedly connected to one side of the outer surface of the handwheel (3), and the screw (4) passes through the frame (11) and is rotatably connected to the frame (11). A slide (13) is threaded onto the outer surface of the screw (4), and the slide (13) is slidably connected to the frame (11) and fixedly connected to the housing (14). The slide (13) matches the scale (9).

4. The workpiece positioning fixture for a bending machine according to claim 1, characterized in that: The self-locking switching assembly includes a motor (20), which is fixedly installed inside the housing (14). The drive end of the motor (20) is fixedly connected to a worm (21), and the outer surface of the worm (21) is meshed with a worm wheel (22). The top of the worm wheel (22) is fixedly connected to a support shaft (12), which passes through the housing (14) and is fixedly connected to the mounting base (10). The support shaft (12) is rotatably connected to the housing (14).

5. The workpiece positioning fixture for a bending machine according to claim 1, characterized in that: The two positioning molds (2) are fixed to the assembly base (10) by a plurality of bolts (6).

6. The workpiece positioning fixture for a bending machine according to claim 1, characterized in that: Both of the contact switches include a threaded connector (18), and the threaded connector (18) is threadedly connected to a threaded hole (16). A ball head (15) is slidably fitted on the top of the threaded connector (18), and a spring (17) is fixedly connected to the bottom of the ball head (15). A pressure sensor (19) is provided at the bottom of the spring (17), and the detection end of the pressure sensor (19) is fixed to the spring (17), and the mounting end of the pressure sensor (19) is fixed to the threaded connector (18).

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