Double-drive parallel inclined material blocking device for bending machine

Abstract

The invention discloses a double-drive parallel inclined material blocking device for a bending machine, which relates to the technical field of bending machines and comprises a hinged cross beam, a left-right lifting device, a left-right moving device, a blocking finger and a blocking finger moving device. The left-right moving device is fixed to the bending main machine, the lifting devices are correspondingly installed on the moving device, the two ends of the hinged cross beam are connected with the lifting devices, a main beam body is provided with a rail and a rack, and the blocking fingers move along the rail through the blocking finger moving device. The cross beam is inclined by adjusting the distance difference between the left moving device and the right moving device, multi-stop-finger multi-point positioning is matched, bevel-edge and special-shaped workpieces are matched, and the defect that a traditional device can only position straight workpieces is overcome. A double-drive ball screw is adopted for transmission, the main beam body is reinforced by aluminum alloy, and the transmission rigidity and precision are high; the finger blocking belt is provided with an anti-skid wear-resistant rubber pad, and all parts are modularly designed, so that installation and maintenance are convenient.

Description

Technical Field

[0001] This invention relates to the field of bending machine technology, specifically to a dual-drive parallel tilting stop device for bending machines. Background Technology

[0002] In many fields such as sheet metal processing, automotive parts manufacturing, and construction machinery equipment production, bending machines, as core equipment for metal sheet forming, directly determine the assembly quality and performance of the final product through their processing precision. The stop device, as a key component of the bending machine, plays a crucial role in positioning the workpiece blank. It must ensure precise alignment between the workpiece bending line and the die center, a prerequisite for guaranteeing bending angle accuracy and dimensional consistency. As the manufacturing industry moves towards higher precision, flexibility, and mass production, the market demands for bending processing are becoming increasingly stringent. On the one hand, workpiece shapes are becoming more diversified; in addition to traditional straight workpieces, the demand for complex structures with beveled edges and irregular edges continues to rise, such as automotive body panels and construction machinery supports. On the other hand, the industry's requirements for processing tolerances have been refined to the ±0.1mm level, and a high degree of consistency must be maintained in mass production. The technical shortcomings of traditional stop devices are becoming increasingly apparent, making them unsuitable for modern production needs.

[0003] Traditional bending machine stop devices generally adopt a structural design of "single horizontal drive and long synchronous belt transmission", such as Figure 8 As shown, the traditional material stop device uses a single horizontal drive device A8 to drive the left moving device A4 and the right moving device A5 to move synchronously back and forth via a long synchronous belt A9. The two ends of the crossbeam A1 form a height adjustment structure through the left lifting device A2 and the right lifting device A3, which can only position straight workpieces. In contrast, due to the relatively weak rigidity of the long synchronous belt, the rigidity of the traditional material stop device is weaker than that of the solution in this patent, resulting in vibration caused by uneven resistance on the left and right sides. Summary of the Invention

[0004] The purpose of this invention is to provide a dual-drive parallel tilting stop device for a bending machine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, a hinged crossbeam, a left lifting device, a right lifting device, a left moving device, a right moving device, a stop finger, and a stop finger moving device are provided. Both the left and right moving devices are fixedly connected to the bending host. The left lifting device is installed on the left moving device, and the right lifting device is installed on the right moving device. The two ends of the hinged crossbeam are respectively connected to the left lifting device and the right lifting device. The articulated crossbeam includes a main beam body. A rotating seat is provided at the bottom of one end of the main beam body. A bearing is installed inside the rotating seat and is rotatably connected to the hinge shaft of either the left or right lifting device through the bearing. A movable rotating seat is provided at the other end of the main beam body. The movable rotating seat includes a fine-tuning guide rail, a connecting seat, and a bearing. A guide rail connecting surface adapted to the movable rotating seat is provided on the inner side of the bottom of the main beam body. A track is provided on the top of the main beam body. The stop finger is installed on the guide rail slide of the track. A rack is arranged on the rear side of the main beam body. The finger-moving device includes a motor, a reducer, a gear, and a connecting plate. The gear meshes with a rack, and the motor drives the gear to rotate via the reducer, thereby moving the finger-moving device along the length of the main beam. Both the left and right lifting devices include a housing, a lifting motor, and a synchronous belt. The top of the housing is connected to a hinge shaft. The housing is slidably fitted with a connecting plate via a linear guide rail. Both ends of the lead screw are connected to the housing via bearing seats. The nut seat on the lead screw is fixed to the connecting plate. The lifting motor drives the lead screw to rotate via a pulley and a synchronous belt, thereby moving the entire lifting device up and down. Both the left and right moving devices include a protective housing, a second linear guide rail, a second lead screw, and a moving motor. The protective housing is fixed to the rear wall panel of the machine tool frame. The second linear guide rail has two rails, each equipped with a double slide. The two ends of the second lead screw are connected to the protective housing through moving bearing seats. The moving nut seat on the second lead screw is fixed to the first connecting plate. The moving motor drives the second lead screw to rotate through a second pulley and a second synchronous belt.

[0006] Furthermore, the fine-tuning guide rail of the movable rotating seat and the guide rail connection surface on the inner side of the bottom of the main beam adopt a sliding fit structure.

[0007] Furthermore, the connecting plate two of the finger-stop moving device is detachably connected to the bottom of the finger-stop by bolts, and the connecting plate two is provided with a waist-shaped adjustment hole to facilitate fine adjustment of the installation position of the finger-stop.

[0008] Furthermore, the meshing surfaces of the synchronous belts and pulleys of the left and right lifting devices are provided with anti-slip textures, and the tension of the synchronous belts is controlled by an adjustable tensioning pulley.

[0009] Furthermore, the lead screws of the left and right moving devices are ball screw structures, and a ball circulation channel is provided between the lead screw and the moving nut seat.

[0010] Furthermore, the main beam of the hinged crossbeam adopts an aluminum alloy extrusion molding structure, and reinforcing ribs are provided inside the main beam.

[0011] Furthermore, the stop fingers include stop finger one, stop finger two, and stop finger three. Multiple stop fingers are distributed at intervals along the track at the top of the main beam. The top of the stop fingers is provided with a wear-resistant rubber pad, and the surface of the rubber pad is provided with anti-slip protrusions.

[0012] Compared with the prior art, the beneficial effects of the present invention are: By adjusting the difference in movement distance between the left and right moving devices, the crossbeam is tilted at a preset angle. With the help of multiple adjustable-spaced stop fingers, the workpiece is positioned at multiple points on the left, middle, and right sides, ensuring that the bending line of the workpiece is precisely aligned with the center of the mold. This solves the drawback of traditional devices that can only position straight workpieces and significantly expands the processing application scenarios of the bending machine.

[0013] Compared to the long synchronous belt drive of traditional devices, this device adopts a ball screw structure driven by independent left and right moving motors. The ball screw is combined with the double slide linear guide, which has stronger transmission rigidity and better motion stability. At the same time, the main beam of the hinged crossbeam adopts an aluminum alloy extrusion molding structure with built-in reinforcing ribs, which ensures structural strength while achieving lightweight.

[0014] The finger-moving device uses gear-rack meshing transmission and a reducer to achieve precise speed adjustment. The spacing between multiple fingers can be flexibly adjusted according to the workpiece width and positioning point requirements. The finger tips are equipped with wear-resistant rubber pads with anti-slip protrusions, which can enhance the stability of the fit with the workpiece blank and prevent scratches on the workpiece surface. The synchronous belt meshing teeth of the lifting device have anti-slip textures, and the tension is controlled by an adjustable tensioning wheel to ensure transmission accuracy. The ball screw and the moving nut seat are designed with a ball circulation channel. The stop finger and the stop finger moving device are detachably connected by a connecting plate with a waist-shaped adjustment hole, which facilitates fine adjustment of the stop finger installation position; the sliding fit structure between the moving rotating seat and the main beam, and the adjustable tension wheel design reduce the difficulty of precision calibration during assembly; each component adopts a modular design, and the left and right lifting devices and moving devices have the same structure, which is highly versatile and facilitates later maintenance and component replacement. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the crossbeam of the present invention; Figure 3 This is a diagram of the hinge structure of the present invention; Figure 4 This is a schematic diagram of the dual-drive horizontal movement device (single side) of the present invention; Figure 5 This is a schematic diagram of the dual-drive lifting device (single side) of the present invention; Figure 6 This is a schematic diagram of the inclined stop workpiece positioning according to the present invention; Figure 7 This is a schematic diagram of the inclined stop workpiece of the present invention; Figure 8 A schematic diagram of a traditional material blocking device.

[0016] In the diagram: 1. Hinged crossbeam; 11. Main beam body; 11-a. Guide rail connection surface; 12. Rotary seat; 13. Bearing; 14. Fine-tuning guide rail; 15. Connecting seat; 17. Rail; 18. Rack; 2. Left lifting device; 21. Housing; 22. Hinged shaft; 23. Linear guide rail one; 24. Lead screw one; 25. Bearing seat; 26. Lifting motor; 27. Pulley one; 28. Synchronous belt one; 29. ​​Nut seat; 3. Right lifting device; 4. Left moving device; 41 42. Protective housing; 43. Linear guide rail II; 44. Lead screw II; 45. Moving nut seat; 46. Moving bearing seat; 47. Connecting plate I; 48. Pulley II; 49. Synchronous belt II; 5. Moving motor; 60. Right moving device; 71. Stop finger; 62. Stop finger I; 63. Stop finger II; 74. Stop finger III; 75. Stop finger moving device; 76. Motor; 77. Reducer; 78. Gear; 79. Connecting plate II; 80. Mold; 81. Workpiece; 82. Workpiece blank; A1. Crossbeam; A2. Left lifting device; A3. Right lifting device; A4. Left moving device; A5. Right moving device; A8. Horizontal drive device; A9. Synchronous belt. Detailed Implementation

[0017] Please see Figures 1-8 The present invention provides a dual-drive parallel inclined material stop device for a bending machine, comprising an articulated crossbeam 1, a left lifting device 2, a right lifting device 3, a left moving device 4, a right moving device 5, a stop finger 6, and a stop finger moving device 7. Both the left moving device 4 and the right moving device 5 are fixedly connected to the bending host. The left lifting device 2 is installed on the left moving device 4, and the right lifting device 3 is installed on the right moving device 5. The two ends of the hinged crossbeam 1 are respectively connected to the left lifting device 2 and the right lifting device 3. The articulated crossbeam 1 includes a main beam body 11. A rotating seat 12 is provided at the bottom of one end of the main beam body 11. A bearing 13 is installed inside the rotating seat 12 and is rotatably connected to the hinge shaft 22 of either the left lifting device 2 or the right lifting device 3 through the bearing 13. A movable rotating seat is provided at the other end of the main beam body 11. The movable rotating seat includes a fine-tuning guide rail 14, a connecting seat 15 and a bearing 13. A guide rail connecting surface 11-a adapted to the movable rotating seat is provided on the inner side of the bottom of the main beam body 11. A track 17 is provided on the top of the main beam body 11. A stop finger 6 is installed on the guide rail slide of the track 17. A rack 18 is arranged on the rear side of the main beam body 11. The finger-moving device 7 includes a motor 71, a reducer 72, a gear 73, and a connecting plate 74. The gear 73 meshes with the rack 18. The motor 71 drives the gear 73 to rotate via the reducer 72, thereby moving the finger-stop 6 along the length of the main beam 11. Both the left lifting device 2 and the right lifting device 3 include a housing 21, a lifting motor 26 and a synchronous belt 28. The top of the housing 21 is connected to the hinge shaft 22. The housing 21 is slidably engaged with the connecting plate 46 via a linear guide rail 23. The two ends of the lead screw 24 are connected to the housing 21 via bearing seats 25. The nut seat 29 on the lead screw 24 is fixed to the connecting plate 46. The lifting motor 26 drives the lead screw 24 to rotate via a pulley 27 and a synchronous belt 28, thereby causing the entire lifting device to move up and down. Both the left moving device 4 and the right moving device 5 include a protective housing 41, a second linear guide rail 42, a second lead screw 43, and a moving motor 49. The protective housing 41 is fixed to the rear wall panel of the machine tool frame. The second linear guide rail 42 is provided with two rails, each equipped with a double slide. The two ends of the second lead screw 43 are connected to the protective housing 41 through the moving bearing seats 45. The moving nut seat 44 on the second lead screw 43 is fixed to the first connecting plate 46. The moving motor 49 drives the second lead screw 43 to rotate through the second pulley 47 and the second synchronous belt 48.

[0018] The fine-tuning guide rail 14 of the movable rotating seat and the guide rail connection surface 11-a on the inner side of the bottom of the main beam 11 adopt a sliding fit structure.

[0019] The connecting plate 74 of the finger-stop moving device 7 is detachably connected to the bottom of the finger-stop 6 by bolts, and the connecting plate 74 is provided with a waist-shaped adjustment hole to facilitate fine adjustment of the installation position of the finger-stop 6.

[0020] The meshing surfaces of the synchronous belt 28 and pulley 27 of the left lifting device 2 and the right lifting device 3 are provided with anti-slip texture, and the tension of the synchronous belt 28 is controlled by an adjustable tensioning pulley.

[0021] The lead screw 43 of the left moving device 4 and the right moving device 5 adopts a ball screw structure, and a ball circulation channel is provided between the lead screw 43 and the moving nut seat 44.

[0022] The main beam 11 of the hinged crossbeam 1 is made of aluminum alloy extrusion molding structure, and the main beam 11 is equipped with reinforcing ribs.

[0023] The stop finger 6 includes stop finger one 61, stop finger two 62, and stop finger three 63. Multiple stop fingers are distributed at intervals along the track 17 at the top of the main beam 11. The top of the stop finger 6 is provided with a wear-resistant rubber pad, and the surface of the rubber pad is provided with anti-slip protrusions.

[0024] like Figure 6 and 7As shown, in the workpiece 83 with a beveled edge, the workpiece blank 83a is placed on the mold 81, and the left moving device 4 and the right moving device 5 are moved to the corresponding positions, so that the blocking beam 11 is tilted. The first blocking finger 61, the second blocking finger 62, and the third blocking finger 63 are located on the left, middle and right sides of the workpiece blank 83a, respectively, so that the bending line L1 of the workpiece is located at the center of the mold 81, and the workpiece beveled edge is accurately positioned.

[0025] The protective housings 41 of the left moving device 4 and the right moving device 5 are fastened to the rear wall panel of the machine tool frame with bolts to ensure that the connection surfaces fit together without gaps and to ensure the overall installation stability of the device.

[0026] The housing 21 of the left lifting device 2 is slidably fitted to the connecting plate 46 of the left moving device 4 via the linear guide rail 23. Similarly, the right lifting device 3 is assembled with the connecting plate 46 of the right moving device 5. Then, the two ends of the lead screw 24 are fixed to the housing 21 via the bearing seats 25, so that the nut seat 29 on the lead screw 24 is firmly connected to the connecting plate 46. Finally, the lifting motor 26, pulley 27 and synchronous belt 28 are installed. The adjustable tensioning wheel is adjusted to ensure that the anti-slip meshing tooth surfaces of the synchronous belt 28 and pulley 27 are tightly fitted and the tension meets the transmission requirements.

[0027] The rotating seat 12 at one end of the main beam 11 of the articulated crossbeam 1 is rotatably connected to the hinge shaft 22 of the left lifting device 2 through the internal bearing 13; the movable rotating seat at the other end is slidably engaged with the guide rail connecting surface 11-a on the inner side of the bottom of the main beam 11 through the fine-tuning guide rail 14, and then the connecting seat 15 of the movable rotating seat is connected to the corresponding hinge shaft 22 of the right lifting device 3 through the bearing 13, so as to ensure that the crossbeam can rotate slightly around the hinge shaft and the movable rotating seat slides smoothly.

[0028] The stop fingers 6 are respectively installed on the guide rail slides of the top track 17 of the main beam 11. The stop fingers 6 are detachably connected to the bolts at the bottom of the stop fingers 6 through the connecting plate 74 of the stop finger moving device 7. The installation position of the stop fingers 6 is finely adjusted by the waist-shaped adjustment hole on the connecting plate 74 to ensure that the multiple stop fingers are evenly distributed along the track 17. Then, the gear 73 of the stop finger moving device 7 is engaged with the rack 18 on the rear side of the main beam 11 to complete the transmission connection between the motor 71, the reducer 72 and the gear 73.

[0029] Check whether the ball circulation channels of the lead screw 43 and the moving nut seat 44 in the left and right moving devices are unobstructed, and whether the double slide of the linear guide 42 slides smoothly; verify that the internal reinforcing ribs of the main beam 11 of the hinged crossbeam 1 are not loose, and that the anti-slip protrusions of the wear-resistant rubber pad at the top of the stop finger 6 are not damaged.

[0030] When it is necessary to position a flat workpiece, the CNC system controls the left moving device 4 and the right moving device 5 to start the moving motors 49 synchronously. The motors 49 drive the ball screw structure 43 to rotate through the pulley 47 and the synchronous belt 48. The ball screw 43 cooperates with the moving nut seat 44 to drive the connecting plate 46, which in turn drives the left and right lifting devices and the hinged crossbeam 1 to move synchronously back and forth along the linear guide rail 42 until the stop finger 6 reaches the positioning position of the flat workpiece, thus realizing the rapid positioning of the flat workpiece.

[0031] When positioning the workpiece 83 with an inclined edge, the CNC system controls the independent movement of the moving motors 49 of the left moving device 4 and the right moving device 5. By adjusting the difference in the moving distance between the two moving devices, the articulated crossbeam 1 rotates around the hinge axis 22 of the rotating seat 12 at one end, and the moving rotating seat at the other end slides adaptively along the guide rail connection surface 11-a, so that the crossbeam 1 presents a preset tilt angle. At the same time, the lifting motors 26 of the left and right lifting devices can synchronously drive the lead screw 24 to rotate, thereby moving the crossbeam 1 up and down as a whole, and adjusting the height of the stop finger 6 to meet the positioning requirements of the workpiece blank 83a.

[0032] According to the workpiece width and positioning point requirements, the motor 71 of the stop finger moving device 7 is started. After the motor 71 is reduced by the reducer 72, it drives the gear 73 to rotate. The gear 73 meshes with the rack 18 to drive the stop finger 6 to move along the track 17 on the top of the main beam 11 in the length direction. The spacing of multiple stop fingers is adjusted to ensure that stop finger 1 61, stop finger 2 62, and stop finger 3 63 correspond to the left, middle, and right positioning points of the workpiece blank 83a, respectively, so that the workpiece bending line L1 is accurately aligned with the center of the mold 81.

[0033] The left and right moving devices 4 and 5 move synchronously, driving the crossbeam 1 to move horizontally to the set position. The lifting device adjusts the height of the crossbeam 1 synchronously, so that the stop finger 6 is flush with the contact surface of the workpiece blank. Place the flat workpiece blank on the mold 81, ensuring that its side edge fits tightly against the wear-resistant rubber pads of the multiple stop fingers 6. Once the positioning is complete, the bending operation can be started.

[0034] Beveled workpiece positioning The CNC system controls the independent movement of the left and right moving devices 4 and 5, drives the crossbeam 1 to tilt to an angle that matches the inclined side of the workpiece, and adjusts the lifting device to make the height of the stop finger 6 match the workpiece blank 83a. Move the stop finger 6 to the preset positioning point, ensuring that stop finger 1 61, stop finger 2 62, and stop finger 3 63 respectively contact the left, middle, and right sides of the workpiece blank 83a. After verifying that the bending line L1 coincides with the center of the mold 81, place the workpiece and press it down to start the bending operation.

Claims

1. A dual-drive parallel tilting stop device for a bending machine, characterized in that, It includes a hinged crossbeam (1), a left lifting device (2), a right lifting device (3), a left moving device (4), a right moving device (5), a stop finger (6), and a stop finger moving device (7); The left moving device (4) and the right moving device (5) are both fixedly connected to the bending host. The left lifting device (2) is installed on the left moving device (4), and the right lifting device (3) is installed on the right moving device (5). The two ends of the hinged crossbeam (1) are respectively connected to the left lifting device (2) and the right lifting device (3). The articulated crossbeam (1) includes a main beam body (11), a rotating seat (12) is provided at the bottom of one end of the main beam body (11), a bearing (13) is installed inside the rotating seat (12), and is rotatably connected to the hinge shaft (22) of one of the left lifting device (2) or the right lifting device (3) through the bearing (13); a movable rotating seat is provided at the other end of the main beam body (11), the movable rotating seat includes a fine-tuning guide rail (14), a connecting seat (15) and a bearing (13), a guide rail connecting surface (11-a) adapted to the movable rotating seat is provided on the inner side of the bottom of the main beam body (11), a track (17) is provided on the top of the main beam body (11), the stop finger (6) is installed on the guide rail slide of the track (17), and a rack (18) is arranged on the rear side of the main beam body (11). The finger-moving device (7) includes a motor (71), a reducer (72), a gear (73) and a connecting plate (74). The gear (73) meshes with the rack (18). The motor (71) drives the gear (73) to rotate via the reducer (72), thereby causing the finger-moving device (6) to move along the length of the main beam (11). The left lifting device (2) and the right lifting device (3) both include a housing (21), a lifting motor (26) and a timing belt (28). The top of the housing (21) is connected to the hinge shaft (22). The housing (21) is slidably connected to the connecting plate (46) through the linear guide rail (23). The two ends of the lead screw (24) are connected to the housing (21) through the bearing seats (25). The nut seat (29) on the lead screw (24) is fixed to the connecting plate (46). The lifting motor (26) drives the lead screw (24) to rotate through the pulley (27) and the timing belt (28), thereby moving the entire lifting device up and down. The left moving device (4) and the right moving device (5) both include a protective housing (41), a second linear guide rail (42), a second lead screw (43) and a moving motor (49). The protective housing (41) is fixed to the rear wall panel of the machine tool frame. The second linear guide rail (42) is provided with two rails, each equipped with a double slide. The two ends of the second lead screw (43) are connected to the protective housing (41) through the moving bearing seat (45). The moving nut seat (44) on the second lead screw (43) is fixed to the first connecting plate (46). The moving motor (49) drives the second lead screw (43) to rotate through the second pulley (47) and the second synchronous belt (48). The fine-tuning guide rail (14) of the movable rotating seat and the guide rail connection surface (11-a) on the inner side of the bottom of the main beam body (11) adopt a sliding fit structure; The connecting plate 2 (74) of the finger-moving device (7) is detachably connected to the bottom of the finger (6) by bolts, and the connecting plate 2 (74) is provided with a waist-shaped adjustment hole to facilitate fine adjustment of the installation position of the finger (6).

2. The dual-drive parallel tilting stop device for a bending machine according to claim 1, characterized in that, The meshing surfaces of the synchronous belt 1 (28) and pulley 1 (27) of the left lifting device (2) and the right lifting device (3) are provided with anti-slip texture, and the tension of the synchronous belt 1 (28) is controlled by an adjustable tensioning wheel.

3. A dual-drive parallel tilting stop device for a bending machine according to claim 1, characterized in that, The lead screws 2 (43) of the left moving device (4) and the right moving device (5) adopt ball screw structure, and a ball circulation channel is provided between the lead screw 2 (43) and the moving nut seat (44).

4. A dual-drive parallel tilting stop device for a bending machine according to claim 1, characterized in that, The main beam (11) of the hinged crossbeam (1) adopts an aluminum alloy extrusion molding structure, and the main beam (11) is equipped with reinforcing ribs.

5. A dual-drive parallel tilting stop device for a bending machine according to claim 1, characterized in that, The stop finger (6) includes stop finger one (61), stop finger two (62) and stop finger three (63). Multiple stop fingers are distributed at intervals along the track (17) at the top of the main beam body (11). The top of the stop finger (6) is provided with a wear-resistant rubber pad, and the surface of the rubber pad is provided with anti-slip protrusions.

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