Angle detection device for bending machine

Abstract

The invention relates to the technical field of angle detection of plate bending pieces, and discloses an angle detection device for a bending machine, which comprises a base, connecting seats are mounted at two ends of the base, open grooves are formed in two ends of the inner side of each connecting seat, and a hydraulic rod is mounted in the center of the top of each connecting seat. The telescopic end of the hydraulic rod penetrates through the top of the connecting base to be connected with a connecting block, and the bottom of the connecting block is connected with an extrusion piece. The light bar projector can emit light perpendicular to the bent plate, the light emitting angle can be obtained at the moment, and then the angle between the bent plate and the lower die can be obtained by subtracting two right angles through quadrangle calculation. Then the angle of the bent plate is obtained by subtracting the two angles of the plate and the lower die from 360 degrees, then the emission angle of light gradually tending to be stable is found out through multi-point detection, at the moment, the rebound phenomenon of the plate is gradually reduced, and the plate tends to be in a static state, so that angle detection is more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of angle detection of plate bending parts, and in particular to an angle detection device for a bending machine. Background Art

[0002] The bending machine is an important forming equipment in the process of sheet metal plastic processing. Due to the complex springback problem when bending the sheet metal, the precise control of the bending angle of the sheet metal has always been an important indicator to measure the performance of the bending machine. The control of the bending angle of the bending machine mainly adopts a semi-closed loop method, that is, adjusting the pressure of the upper die to control the bending angle. The angle of sheet metal forming is related to the mold opening, sheet metal thickness, material springback, and the pressure of the upper die.

[0003] The CNC system can only control the amount of upper mold pressure, and is powerless to the errors caused by factors outside the ring. This problem can be roughly divided into two types of contact and non-contact measurements. Contact measurement uses a mechanical device and a single-point measurement method. The structure is relatively complex, and the measurement accuracy depends on the accuracy of the mechanical structure. Non-contact measurement generally uses a laser rangefinder to detect the distance between the measuring head and the workpiece surface, and calculates the bending angle according to relevant algorithms. These methods are all single-point measurements, and the measurement accuracy depends on the surface quality of the workpiece at the measuring point, which is prone to errors. In addition, these methods are based on the situation where the plate does not deviate during the bending process. In actual production, it is difficult to accurately align the upper and lower dies, which leads to measurement errors.

[0004] Therefore, it is necessary to provide an angle detection device for a bending machine to solve the above technical problems. Summary of the invention

[0005] The purpose of the present invention is to provide an angle detection device for a bending machine to solve the problems existing in the above-mentioned background technology. The technical solution of the present invention aims at the technical problem that the existing technical solution is too single, and provides a solution that is significantly different from the existing technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an angle detection device for a bending machine, comprising a base, connecting seats are installed at both ends of the base, slots are opened at both ends of the inner side of the connecting seat, a lower mold is installed on the top of the base, a hydraulic rod is installed at the top center of the connecting seat, the telescopic end of the hydraulic rod passes through the top of the connecting seat and is connected to a connecting block, the bottom of the connecting block is connected to an extrusion piece, and connecting plates extending to the inside of the slot are installed at both ends of the extrusion piece, a first adjustment mechanism is arranged inside the slot, a through slot is opened at the bottom of the slot, a second adjustment mechanism is arranged inside the through slot, and detection mechanisms are arranged at the front and rear ends of the base.

[0007] Preferably, the first adjusting mechanism includes a first threaded sleeve rotatably connected to one end of the slot, and a tooth block is installed on the outer wall of the first threaded sleeve, a first tooth plate is installed on the bottom rear end face of the connecting plate to form a meshing connection with the first threaded sleeve, a first threaded rod is arranged inside the first threaded sleeve, and a limiting structure is arranged between the first threaded rod and the slot, a telescopic structure is installed on the end of the first threaded rod facing the lower mold, and the telescopic end of the telescopic structure is connected to the first extrusion plate.

[0008] Preferably, the telescopic structure includes a first mounting seat connected to one end of the first threaded rod, the first mounting seat is provided with a groove at one end facing the lower mold, a spring is installed inside the groove, and the other end of the spring is connected to the first extrusion plate.

[0009] Preferably, the second adjusting mechanism includes a rotating seat installed at the bottom of the through groove, a second threaded sleeve is provided on the inner side of the rotating seat, a tooth block is installed on the outer wall of the second threaded sleeve, a second tooth plate is installed at the bottom front end of the connecting plate to form a meshing connection with the second threaded sleeve, second threaded rods are installed at both ends inside the second threaded sleeve, a telescopic part is connected to the separated end of the second threaded rod, an L-plate is connected to the telescopic end of the telescopic part, and a second extrusion plate is connected to the end of the L-plate facing the lower mold.

[0010] Preferably, the detection mechanism includes an arc-shaped plate installed at both ends of the front and rear end surfaces of the base, the opposite end of the arc-shaped plate is rotatably connected to a rotating rod, the outer wall of the rotating rod is sleeved with a rotating wheel, the outer walls of the two rotating wheels are connected by setting a conveyor belt, and the outer wall of the conveyor belt is installed with a detection part.

[0011] Preferably, the detection unit includes a slider connected to the outer wall of the conveyor belt, and the end of the slider away from the lower mold is connected to the light bar projector through an arc block, and cameras with adjustable angles are installed at both ends of the light bar projector.

[0012] Preferably, a fixing plate is connected to the opposite end of the arc-shaped plate on the same plane, and the fixing plate passes through both ends of the slider, and a sliding limit connection is formed between the fixing plate and the slider.

[0013] Compared with the prior art, the present invention has the following beneficial effects: In the process of the hydraulic rod moving downward to move the extrusion member downward, the first tooth plate connected to one end of the bottom of the connecting plate will engage with the tooth block provided on the outer wall of the first threaded sleeve to rotate the first threaded sleeve, thereby causing the first threaded rod to move toward the lower die, and causing the first extrusion plate to move toward the lower die. When the extrusion member contacts the plate, the first extrusion plate has clamped the plate and placed the plate in the left and right center position.

[0014] In the process of the hydraulic rod moving downward to move the extrusion part downward, the second tooth plate connected to one end of the bottom of the connecting plate will mesh with the tooth block provided on the outer wall of the second threaded sleeve to rotate the second threaded sleeve, thereby causing the second threaded rod to move toward the inside of the through groove, so that the telescopic part drives the L plate to move toward the lower mold direction, so that the second extrusion plate clamps the plate. Since the telescopic part adopts the same structure as the telescopic structure, the second extrusion plate can clamp plates of different sizes, and the front and rear positions of the plates can be adjusted to make the plates symmetrical front and back.

[0015] The light strip projector provided in the present invention will emit light perpendicular to the bent plate. At this time, the angle of light emission can be obtained. Then, through quadrilateral calculation, the angle between the bent plate and the lower mold can be obtained by subtracting two right angles. Then, the angle of the bent plate is obtained by subtracting the two angles between the plate and the lower mold from 360 degrees. Then, through multi-point detection, the emission angle at which the light gradually tends to be stable is found. At this time, the plate gradually reduces the rebound phenomenon and tends to a static state, so that the angle detection is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A perspective view of the present invention; Figure 2 It is a side view structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the side structure of the connecting seat of the present invention; Figure 4 It is a schematic diagram of the top view of the structure of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 For the present invention Figure 4 A schematic diagram of a top view structure without the connecting plate; Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle; Figure 8 A three-dimensional diagram showing the installation of the detection mechanism of the present invention.

[0017] In the figure: 1. base; 2. connecting seat; 3. slot; 4. lower mold; 5. hydraulic rod; 6. connecting block; 7. extrusion piece; 8. connecting plate; 9. first adjusting mechanism; 901. first threaded sleeve; 902. first threaded rod; 903. telescopic structure; 9031. first mounting seat; 9032. groove; 9033. spring; 904. first extrusion plate; 10. through slot; 11. second adjusting mechanism; 1101. rotating seat; 1102. second threaded sleeve; 1103. second threaded rod; 1104. telescopic part; 1105. L plate; 1106. second extrusion plate; 12. detection mechanism; 1201. arc plate; 1202. rotating rod; 1203. rotating wheel; 1204. conveyor belt; 13. slider; 14. light bar projector; 15. camera; 16. fixed plate. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of an embodiment of the present invention based on the overall structure of the present invention.

[0020] See also Figure 1-Figure 8, an angle detection device for a bending machine, comprising a base 1, a connecting base 2 is installed at both ends of the base 1, slots 3 are opened at both ends of the inner side of the connecting base 2, a lower die 4 is installed on the top of the base 1, a hydraulic rod 5 is installed at the top center of the connecting base 2, the telescopic end of the hydraulic rod 5 passes through the top of the connecting base 2 and is connected to a connecting block 6, the bottom of the connecting block 6 is connected to an extrusion piece 7, and both ends of the extrusion piece 7 are installed with connecting plates 8 extending to the inside of the slot 3, a first adjusting mechanism 9 is arranged inside the slot 3, a through slot 10 is opened at the bottom of the slot 3, a second adjusting mechanism 11 is arranged inside the through slot 10, and a detection mechanism 12 is arranged at the front and rear ends of the base 1.

[0021] like Figure 1-Figure 8 As shown, the first adjusting mechanism 9 includes a first threaded sleeve 901 rotatably connected to one end of the slot 3, and a tooth block is installed on the outer wall of the first threaded sleeve 901, and a first tooth plate is installed on the rear end face of the bottom of the connecting plate 8 to form a meshing connection with the first threaded sleeve 901, a first threaded rod 902 is arranged inside the first threaded sleeve 901, and a limiting structure is arranged between the first threaded rod 902 and the slot 3, and a telescopic structure 903 is installed on the end of the first threaded rod 902 facing the lower mold 4, and the telescopic end of the telescopic structure 903 is connected to the first extrusion plate 904. In the process of the hydraulic rod 5 moving downward to move the extrusion member 7 downward, the first tooth plate connected to the bottom end of the connecting plate 8 will mesh with the tooth block arranged on the outer wall of the first threaded sleeve 901 to rotate the first threaded sleeve 901, thereby causing the first threaded rod 902 to move toward the lower mold 4, and causing the first extrusion plate 904 to move toward the lower mold 4. When the extrusion member 7 contacts the plate, the first extrusion plate 904 has clamped the plate and made the plate in the left and right center position.

[0022] like Figure 1-Figure 8 As shown, the telescopic structure 903 includes a first mounting seat 9031 connected to one end of the first threaded rod 902, and the first mounting seat 9031 is provided with a groove 9032 at one end facing the lower mold 4, and a spring 9033 is installed inside the groove 9032, and the other end of the spring 9033 is connected to the first extrusion plate 904. When the plate is not placed symmetrically at the beginning, the first extrusion plate 904 on one side will first contact the plate and move the plate toward the other end until both ends of the plate contact the first extrusion plate 904 at the same time. When the two first extrusion plates 904 contact the plate and the extrusion member 7 has not yet contacted the plate, the first extrusion plate 904 can be adjusted within a certain displacement by compressing the spring 9033, so that the lower mold 4 can support plates of different sizes.

[0023] like Figure 1-Figure 8As shown, the second adjustment mechanism 11 includes a rotating seat 1101 installed at the bottom of the through groove 10, a second threaded sleeve 1102 is arranged on the inner side of the rotating seat 1101, a tooth block is installed on the outer wall of the second threaded sleeve 1102, a second tooth plate is installed at the bottom front end of the connecting plate 8 to form a meshing connection with the second threaded sleeve 1102, second threaded rods 1103 are installed at both ends of the second threaded sleeve 1102, and a telescopic part 1104 is connected to the separated end of the second threaded rod 1103 (referring to the ends of the two second threaded rods 1103 that are away from each other), and the telescopic end of the telescopic part 1104 is connected to an L plate 1105, and the end of the L plate 1105 facing the lower mold 4 is connected to a second extrusion Plate 1106, when the hydraulic rod 5 moves downward to move the extrusion piece 7 downward, the second tooth plate connected to the bottom end of the connecting plate 8 will engage with the tooth block provided on the outer wall of the second threaded sleeve 1102 to rotate the second threaded sleeve 1102, thereby causing the second threaded rod 1103 to move toward the inside of the through groove 10, so that the telescopic part 1104 drives the L plate 1105 to move toward the lower mold 4, so that the second extrusion plate 1106 clamps the plate. Since the telescopic part 1104 adopts the same structure as the telescopic structure 903, the second extrusion plate 1106 can clamp plates of different sizes, and the front and rear positions of the plates can be adjusted to make the plates symmetrical front and back.

[0024] like Figure 1-Figure 8 As shown, the detection mechanism 12 includes an arc-shaped plate 1201 installed at both ends of the front and rear end surfaces of the base 1, and the opposite end of the arc-shaped plate 1201 is rotatably connected to a rotating rod 1202, and the outer wall of the rotating rod 1202 is sleeved with a rotating wheel 1203. The outer walls of the two rotating wheels 1203 are connected by setting a conveyor belt 1204, and the outer wall of the conveyor belt 1204 is installed with a detection part. The driving device can drive the rotating rod 1202 to rotate and then drive the rotating wheel 1203 to rotate, thereby transmitting the conveyor belt 1204, and the slider 13 connected to the outer wall of the conveyor belt 1204 can be moved, so that the detection part can detect various positions of the bent plate, thereby increasing the accuracy of the detection result.

[0025] like Figure 1-Figure 8As shown, the detection unit includes a slider 13 connected to the outer wall of the conveyor belt 1204, and the end of the slider 13 away from the lower mold 4 is connected to the light bar projector 14 through an arc block. Cameras 15 with adjustable angles are installed at both ends of the light bar projector 14. The light bar projector 14 will emit light perpendicular to the bent plate. At this time, the angle of light emission can be obtained, and then the angle between the bent plate and the lower mold 4 can be obtained by quadrilateral calculation, and then the two angles between the plate and the lower mold 4 are subtracted from three hundred and sixty degrees to get the angle of the bent plate. Then, through multi-point detection, the emission angle of the light gradually tends to be stable. At this time, the plate gradually reduces the rebound phenomenon and tends to be static, so that the angle detection is more accurate.

[0026] like Figure 1-Figure 8 As shown, the opposite end of the arc plate 1201 in the same plane is connected to a fixed plate 16, and the fixed plate 16 passes through both ends of the slider 13, and a sliding limit connection is formed between the fixed plate 16 and the slider 13. The fixed plate 16 is set so that the slider 13 is limited during movement, and it is difficult to deviate.

[0027] Working principle: When the hydraulic rod 5 moves downward to move the extrusion piece 7 downward, the first tooth plate connected to one end of the bottom of the connecting plate 8 will mesh with the tooth block provided on the outer wall of the first threaded sleeve 901 to rotate the first threaded sleeve 901, thereby causing the first threaded rod 902 to move toward the lower die 4, causing the first extrusion plate 904 to move toward the lower die 4. When the extrusion piece 7 contacts the plate, the first extrusion plate 904 has already clamped the plate and placed it in the left-right center position. When the plate is not placed symmetrically at the beginning, the first extrusion plate 904 on one side will contact the plate first and press it. The plate moves toward the other end until both ends of the plate contact the first extrusion plate 904 at the same time. When the two first extrusion plates 904 contact the plate and the extrusion member 7 has not yet contacted the plate, the first extrusion plate 904 can be adjusted within a certain displacement by compressing the spring 9033, so that the lower die 4 can support plates of different sizes. In the process of the hydraulic rod 5 moving downward to move the extrusion member 7 downward, the second tooth plate connected to one end of the bottom of the connecting plate 8 will mesh with the tooth block provided on the outer wall of the second threaded sleeve 1102 to rotate the second threaded sleeve 1102, thereby causing the second threaded rod 1103 to move upward. The telescopic portion 1104 moves toward the inside of the through slot 10, so that the telescopic portion 1104 drives the L plate 1105 to move toward the lower mold 4, so that the second extrusion plate 1106 clamps the plate. Since the telescopic portion 1104 adopts the same structure as the telescopic structure 903, the second extrusion plate 1106 can clamp plates of different sizes, and the front and rear positions of the plates can be adjusted to make the plates symmetrical front and back. The driving device can drive the rotating rod 1202 to rotate and then drive the rotating wheel 1203 to rotate, thereby transmitting the conveyor belt 1204, and the slider 13 connected to the outer wall of the conveyor belt 1204 can be moved. , so that the detection unit can detect each position of the bent plate, thereby increasing the accuracy of the detection structure, and the light bar projector 14 set up will emit light perpendicular to the bent plate. At this time, the angle of light emission can be obtained, and then through quadrilateral calculation, subtracting two right angles can be used to obtain the angle between the bent plate and the lower mold 4, and then subtracting the two angles between the plate and the lower mold 4 from 360 degrees is the angle of the bent plate, and then through multi-point detection, find out the emission angle at which the light gradually tends to be stable. At this time, the plate gradually reduces the rebound phenomenon and tends to a static state, so that the angle detection is more accurate.

[0028] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An angle detection device for a bending machine, comprising a base (1), connecting seats (2) being installed at both ends of the base (1), and slots (3) being provided at both ends of the inner side of the connecting seat (2), characterized in that: A lower mold (4) is installed on the top of the base (1), a hydraulic rod (5) is installed at the center of the top of the connecting seat (2), the telescopic end of the hydraulic rod (5) passes through the top of the connecting seat (2) and is connected to a connecting block (6), the bottom of the connecting block (6) is connected to an extrusion piece (7), both ends of the extrusion piece (7) are installed with connecting plates (8) extending to the inside of the slot (3), a first adjustment mechanism (9) is arranged inside the slot (3), a through slot (10) is opened at the bottom of the slot (3), a second adjustment mechanism (11) is arranged inside the through slot (10), and detection mechanisms (12) are arranged at the front and rear ends of the base (1).

2. The angle detection device for a bending machine according to claim 1, characterized in that: The first adjustment mechanism (9) comprises a first threaded sleeve (901) rotatably connected to one end of the slot (3), and a tooth block is installed on the outer wall of the first threaded sleeve (901), a first tooth plate is installed on the bottom rear end surface of the connecting plate (8) to form a meshing connection with the first threaded sleeve (901), a first threaded rod (902) is arranged inside the first threaded sleeve (901), and a limiting structure is arranged between the first threaded rod (902) and the slot (3), and a telescopic structure (903) is installed on one end of the first threaded rod (902) facing the lower mold (4), and the telescopic end of the telescopic structure (903) is connected to a first extrusion plate (904).

3. The angle detection device for a bending machine according to claim 2, characterized in that: The telescopic structure (903) comprises a first mounting seat (9031) connected to one end of the first threaded rod (902); a groove (9032) is provided at one end of the first mounting seat (9031) facing the lower die (4); a spring (9033) is installed inside the groove (9032); and the other end of the spring (9033) is connected to the first extrusion plate (904).

4. The angle detection device for a bending machine according to claim 1, characterized in that: The second adjustment mechanism (11) comprises a rotating seat (1101) mounted at the bottom of the through groove (10); a second threaded sleeve (1102) is arranged on the inner side of the rotating seat (1101); a tooth block is mounted on the outer wall of the second threaded sleeve (1102); a second tooth plate is mounted at the bottom front end of the connecting plate (8) to form a meshing connection with the second threaded sleeve (1102); second threaded rods (1103) are mounted at both ends of the second threaded sleeve (1102); a telescopic portion (1104) is connected to the separated end of the second threaded rod (1103); an L-plate (1105) is connected to the telescopic end of the telescopic portion (1104); and a second extrusion plate (1106) is connected to the end of the L-plate (1105) facing the lower die (4).

5. The angle detection device for a bending machine according to claim 1, characterized in that: The detection mechanism (12) comprises an arc-shaped plate (1201) mounted at both ends of the front and rear end surfaces of the base (1); an opposite end of the arc-shaped plate (1201) is rotatably connected to a rotating rod (1202); a rotating wheel (1203) is sleeved on the outer wall of the rotating rod (1202); the outer walls of the two rotating wheels (1203) are connected by a conveyor belt (1204); and a detection unit is mounted on the outer wall of the conveyor belt (1204).

6. The angle detection device for a bending machine according to claim 5, characterized in that: The detection unit comprises a slider (13) connected to the outer wall of the conveyor belt (1204); one end of the slider (13) away from the lower mold (4) is connected to a light bar projector (14) via an arc block; and cameras (15) with adjustable angles are installed at both ends of the light bar projector (14).

7. The angle detection device for a bending machine according to claim 6, characterized in that: A fixing plate (16) is connected to the opposite end of the arc-shaped plate (1201) on the same plane, and the fixing plate (16) passes through both ends of the slider (13), and a sliding limit connection is formed between the fixing plate (16) and the slider (13).

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