An angle detection device for a bending machine

Abstract

The present invention relates to the technical field of angle detection of sheet metal bending parts, and discloses an angle detection device for a bending machine, including a base. Connecting seats are installed at both ends of the base. Slots are opened at both inner ends of the connecting seats. A hydraulic rod is installed at the center of the top of the connecting seat. The telescopic end of the hydraulic rod penetrates through the top of the connecting seat and is connected with a connecting block. An extrusion piece is connected to the bottom of the connecting block. In the present invention, the light strip projector emits light perpendicular to the bent sheet metal. At this time, the angle of light emission can be obtained. Then, through quadrilateral calculation, subtracting two right angles can obtain the angle between the bent sheet metal and the lower die. Then, subtracting the two angles between the sheet metal and the lower die from 360 degrees is the angle of the bent sheet metal. Then, through multi-point detection, the light emission angle where the light gradually tends to be stable is found. At this time, the sheet metal gradually reduces the springback phenomenon and tends to a static state, so that the angle detection is more accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of angle detection of sheet metal bending parts, and specifically relates to an angle detection device for a bending machine. Background Art

[0002] A bending machine is an important forming equipment in the process of sheet metal plastic processing. Due to the complex springback problem during sheet metal bending, 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 pressing amount of the upper die to control the bending angle, and the formed angle of the sheet metal is related to the die opening, sheet thickness, material springback, and the pressing amount of the upper die.

[0003] The numerical control system can only control the pressing amount of the upper die and is powerless to the errors caused by factors outside the loop. Generally, this problem can be divided into two types: contact measurement and non-contact measurement. Contact measurement uses a mechanical device and a single-point measurement method, with a relatively complex structure, 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 measurement 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 measurement point, which is prone to errors. And these methods are all based on the situation where the sheet metal does not shift during the bending process. In actual production, it is very difficult for the upper and lower punching dies to be accurately aligned, which brings 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 background art. The technical solution of the present invention provides a solution significantly different from the prior art for the technical problem of the overly single solution of the prior art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An angle detection device for a bending machine, including a base, connection seats are installed at both ends of the base, slots are opened at both inner ends of the connection seats, a lower die is installed on the top of the base, a hydraulic rod is installed at the center of the top of the connection seat, the telescopic end of the hydraulic rod penetrates through the top of the connection seat and is connected with a connection block, an extrusion member is connected to the bottom of the connection block, connection plates extending into the slots are installed at both ends of the extrusion member, a first adjustment mechanism is arranged inside the slots, a through slot is communicated and opened at the bottom of the slots, 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 adjustment mechanism includes a first threaded sleeve rotatably connected to one end of the slotted groove, and a toothed block is installed on the outer wall of the first threaded sleeve. A first toothed plate is installed on the rear end surface of the bottom of the connecting plate and is engaged 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 slotted groove. One end of the first threaded rod facing the lower die is provided with a telescopic structure, and the telescopic end of the telescopic structure is connected with a first pressing plate.

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

[0009] Preferably, the second adjustment mechanism includes a rotating seat installed at the bottom of the through groove. A second threaded sleeve is arranged inside the rotating seat. A toothed block is installed on the outer wall of the second threaded sleeve. A second toothed plate is installed at the front end of the bottom of the connecting plate and is engaged with the second threaded sleeve. Two ends of the inside of the second threaded sleeve are provided with second threaded rods. The separated ends of the second threaded rods are connected with a telescopic part, and the telescopic end of the telescopic part is connected with an L-shaped plate. One end of the L-shaped plate facing the lower die is connected with a second pressing plate.

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

[0011] Preferably, the detection part includes a slider connected to the outer wall of the conveyor belt. One end of the slider away from the lower die is connected with a light bar projector through an arc-shaped block. Adjustable-angle cameras are installed at both ends of the light bar projector.

[0012] Preferably, the opposite ends of the arc-shaped plates on the same plane are connected with a fixing plate, and the fixing plate penetrates 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 beneficial effects of the present invention are as follows:

[0014] During the process that the hydraulic rod moves downward to make the extrusion part move downward in the present invention, the first toothed plate connected to one end of the bottom of the connecting plate will be engaged with the toothed block arranged on the outer wall of the first threaded sleeve, so that the first threaded sleeve rotates, and then the first threaded rod moves in the direction of the lower die, making the first pressing plate move in the direction of the lower die. When the extrusion part contacts the plate, the first pressing plate has clamped the plate and made the plate in the left-right center position.

[0015] During the process of the hydraulic rod moving downward to make the extrusion part move downward, the second toothed plate connected to one end of the bottom of the connecting plate will engage with the toothed block arranged on the outer wall of the second threaded sleeve, causing the second threaded sleeve to rotate. As a result, the second threaded rod moves towards the inside of the through groove, causing the telescopic part to drive the L plate to move towards the lower die, making the second extrusion plate clamp 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 can adjust the front and back positions of the plate, making the plate symmetrical front and back.

[0016] The light bar projector provided in the present invention emits light perpendicular to the bent plate. At this time, the angle of light emission can be obtained. Then, through quadrilateral calculation, subtracting two right angles can obtain the angle between the bent plate and the lower die. Then, subtracting the two angles between the plate and the lower die from 360 degrees is the angle of the bent plate. 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 springback phenomenon and tends to a static state, so that the angle detection is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional view of the present invention;

[0018] Figure 2 is a schematic side view structure diagram of the present invention;

[0019] Figure 3 is a schematic side view structure diagram of the connecting seat of the present invention;

[0020] Figure 4 is a schematic top view structure diagram of the present invention;

[0021] Figure 5 is the present invention Figure 4 enlarged view of part A in;

[0022] Figure 6 is the present invention Figure 4 top view structure diagram of the present invention excluding the connecting plate;

[0023] Figure 7 is the present invention Figure 6 enlarged view of part B in;

[0024] Figure 8 is a three-dimensional view of the installation of the detection mechanism of the present invention.

[0025] In the figure: 1, base; 2, connecting seat; 3, slotted; 4, lower die; 5, hydraulic rod; 6, connecting block; 7, extrusion part; 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-shaped 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, fixing plate. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed 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 "installation", "connection", "connection", "setting" 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, and it can be the communication inside 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 situations. Next, the embodiments of the present invention will be described according to the overall structure of the present invention.

[0028] Please refer to Figures 1 - 8, An angle detection device for a bending machine, comprising a base 1. Connecting seats 2 are installed at both ends of the base 1. Grooves 3 are opened at both inner ends of the connecting seats 2. A lower die 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 penetrates through the top of the connecting seat 2 and is connected with a connecting block 6. A pressing member 7 is connected to the bottom of the connecting block 6. Connecting plates 8 extending into the inside of the grooves 3 are installed at both ends of the pressing member 7. A first adjusting mechanism 9 is arranged inside the groove 3. A through groove 10 is communicated and opened at the bottom of the groove 3. A second adjusting mechanism 11 is arranged inside the through groove 10. Detection mechanisms 12 are arranged at the front and rear ends of the base 1.

[0029] As Figures 1 - 8 shown, the first adjusting mechanism 9 includes a first threaded sleeve 901 rotatably connected to one end of the groove 3. And a toothed block is installed on the outer wall of the first threaded sleeve 901. A first toothed plate is installed on the rear end face of the bottom of the connecting plate 8 and is meshed 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 groove 3. A telescopic structure 903 is installed at one end of the first threaded rod 902 facing the lower die 4. The telescopic end of the telescopic structure 903 is connected with a first pressing plate 904. During the process of the hydraulic rod 5 moving downward to make the pressing member 7 move downward, the first toothed plate connected to one end of the bottom of the connecting plate 8 will be meshed with the toothed block arranged on the outer wall of the first threaded sleeve 901, causing the first threaded sleeve 901 to rotate. Furthermore, the first threaded rod 902 moves in the direction of the lower die 4, making the first pressing plate 904 move in the direction of the lower die 4. When the pressing member 7 contacts the plate, the first pressing plate 904 has already clamped the plate and made the plate in the left-right center position.

[0030] As Figures 1 - 8 shown, the telescopic structure 903 includes a first mounting seat 9031 connected to one end of the first threaded rod 902. A groove 9032 is opened at one end of the first mounting seat 9031 facing the lower die 4. A spring 9033 is installed inside the groove 9032. The other end of the spring 9033 is connected with the first pressing plate 904. When the plate starts to be placed without being left-right symmetrical, one side of the first pressing plate 904 will contact the plate first and move the plate towards the other end until both ends of the plate contact the first pressing plate 904 simultaneously. When both first pressing plates 904 contact the plate and the pressing member 7 has not yet contacted the plate, the first pressing 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.

[0031] As Figures 1 - 8As shown in the figure, the second adjustment mechanism 11 includes a rotating seat 1101 installed at the bottom of the through slot 10. A second threaded sleeve 1102 is arranged inside the rotating seat 1101. A toothed block is installed on the outer wall of the second threaded sleeve 1102. A second toothed plate is installed at the front end of the bottom of the connecting plate 8 and is meshed with the second threaded sleeve 1102. At both ends inside the second threaded sleeve 1102, second threaded rods 1103 are installed. The separated ends of the second threaded rods 1103 (referring to the ends where the two second threaded rods 1103 are away from each other) are connected to a telescopic part 1104. The telescopic end of the telescopic part 1104 is connected to an L-shaped plate 1105. One end of the L-shaped plate 1105 facing the lower die 4 is connected to a second pressing plate 1106. During the process of the hydraulic rod 5 moving downward to make the pressing part 7 move downward, the second toothed plate connected to one end of the bottom of the connecting plate 8 will be meshed with the toothed block arranged on the outer wall of the second threaded sleeve 1102, causing the second threaded sleeve 1102 to rotate. As a result, the second threaded rods 1103 move towards the inside of the through slot 10, causing the telescopic part 1104 to drive the L-shaped plate 1105 to move towards the lower die 4, making the second pressing plate 1106 clamp the plate. Since the telescopic part 1104 adopts the same structure as the telescopic structure 903, the second pressing plate 1106 can clamp plates of different sizes and can adjust the front and back positions of the plate, making the front and back of the plate symmetrical.

[0032] As Figures 1 - 8 shown in the figure, the detection mechanism 12 includes arc-shaped plates 1201 installed at both ends of the front and back end faces of the base 1. A rotating rod 1202 is rotatably connected to the opposite ends of the arc-shaped plates 1201. 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. A detection part is installed on the outer wall of the conveyor belt 1204. By means of a driving device, the rotating rod 1202 can be driven to rotate, and then the rotating wheel 1203 can be driven to rotate, thereby driving the conveyor belt 1204. The slider 13 connected to the outer wall of the conveyor belt 1204 can be moved, enabling the detection part to detect each position of the bent plate, thereby increasing the accuracy of the detection result.

[0033] As Figures 1 - 8As shown, the detection unit includes a slider 13 connected to the outer wall of the conveyor belt 1204. One end of the slider 13 away from the lower die 4 is connected to a light bar projector 14 through an arc-shaped block. Adjustable-angle cameras 15 are installed at both ends of the light bar projector 14. The light bar projector 14 emits light perpendicular to the bent sheet. At this time, the emission angle of the light can be obtained. Then, through quadrilateral calculation, subtracting two right angles can obtain the angle between the bent sheet and the lower die 4. Then, subtracting the two angles between the sheet and the lower die 4 from 360 degrees is the angle of the bent sheet. Then, through multi-point detection, the emission angle at which the light gradually tends to be stable is found. At this time, the sheet gradually reduces the springback phenomenon and tends to a static state, so that the angle detection is more accurate.

[0034] As Figures 1 - 8 As shown, one end of the arc-shaped plate 1201 in the same plane is connected to a fixing plate 16, and the fixing plate 16 penetrates through both ends of the slider 13. A sliding limit connection is formed between the fixing plate 16 and the slider 13. The fixing plate 16 is provided to limit the movement of the slider 13, making it difficult to deviate.

[0035] Working principle: During the process of the hydraulic rod 5 moving downward to make the extrusion part 7 move downward, the first toothed plate connected to one end of the bottom of the connecting plate 8 will engage with the toothed block arranged on the outer wall of the first threaded sleeve 901, causing the first threaded sleeve 901 to rotate. As a result, the first threaded rod 902 moves towards the lower die 4, making the first extrusion plate 904 move towards the lower die 4. When the extrusion part 7 contacts the plate, the first extrusion plate 904 has already clamped the plate and made the plate in the left-right center position. When the plate is initially placed without being left-right symmetric, one side of the first extrusion plate 904 will first contact the plate and move the plate towards the other end until both ends of the plate simultaneously contact the first extrusion plate 904. When the two first extrusion plates 904 contact the plate and the extrusion part 7 has not yet contacted the plate, the first extrusion plate 904 can be adjusted within a certain displacement through the compression spring 9033, so that the lower die 4 can support plates of different sizes. During the process of the hydraulic rod 5 moving downward to make the extrusion part 7 move downward, the second toothed plate connected to one end of the bottom of the connecting plate 8 will engage with the toothed block arranged on the outer wall of the second threaded sleeve 1102, causing the second threaded sleeve 1102 to rotate. As a result, the second threaded rod 1103 moves towards the inside of the through groove 10, making the telescopic part 1104 drive the L plate 1105 to move towards the lower die 4, making the second extrusion plate 1106 clamp 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 can adjust the front-back position of the plate to make the plate front-back symmetric. The driving device can drive the rotating rod 1202 to rotate, and then drive the rotating wheel 1203 to rotate, thereby driving the conveyor belt 1204, and moving the slider 13 connected to the outer wall of the conveyor belt 1204, so that the detection part can detect each position of the bent plate, thereby increasing the accuracy of the detection structure. The light bar projector 14 emits light perpendicular to the bent plate. At this time, the emission angle of the light can be obtained. Then, through quadrilateral calculation, subtracting two right angles can obtain the angle between the bent plate and the lower die 4. Then, subtracting the two angles between the plate and the lower die 4 from 360 degrees is the angle of the bent plate. Then, through multi-point detection, find the emission angle at which the light gradually tends to be stable. At this time, the plate gradually reduces the springback phenomenon and tends to a static state, so that the angle detection is more accurate.

[0036] It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. An angle detection device for a bending machine, comprising a base (1), wherein two ends of the base (1) are provided with connecting seats (2), and both ends of the inner side of the connecting seats (2) are provided with slots (3), characterized in that: The lower die (4) is installed on the top of the base (1). The hydraulic rod (5) is installed at the center of the top of the connecting seat (2). The telescopic end of the hydraulic rod (5) penetrates through the top of the connecting seat (2) and is connected with a connecting block (6). The bottom of the connecting block (6) is connected with an extrusion member (7). The two ends of the extrusion member (7) are installed with connecting plates (8) extending into the slot (3). A first adjustment mechanism (9) is arranged inside the slot (3). A through slot (10) is communicated and opened at the bottom of the slot (3). A second adjustment mechanism (11) is arranged inside the through slot (10). Detection mechanisms (12) are arranged at the front and rear ends of the base (1). The first adjustment mechanism (9) includes a first threaded sleeve (901) rotatably connected to one end of the slot (3). And a toothed block is installed on the outer wall of the first threaded sleeve (901). A first toothed plate is installed on the rear end face of the bottom of the connecting plate (8) and is meshed 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). A telescopic structure (903) is installed at one end of the first threaded rod (902) facing the lower die (4). The telescopic end of the telescopic structure (903) is connected with a first pressing plate (904). The telescopic structure (903) includes a first mounting seat (9031) connected to one end of the first threaded rod (902). A groove (9032) is opened at one end of the first mounting seat (9031) facing the lower die (4). A spring (9033) is installed inside the groove (9032). The other end of the spring (9033) is connected with the first pressing plate (904). The second adjustment mechanism (11) includes a rotating seat (1101) installed at the bottom of the through slot (10). A second threaded sleeve (1102) is arranged inside the rotating seat (1101). A toothed block is installed on the outer wall of the second threaded sleeve (1102). A second toothed plate is installed on the front end of the bottom of the connecting plate (8) and is meshed with the second threaded sleeve (1102). Two second threaded rods (1103) are installed at both ends inside the second threaded sleeve (1102). The separated ends of the second threaded rods (1103) are connected with a telescopic part (1104). The telescopic end of the telescopic part (1104) is connected with an L-shaped plate (1105). One end of the L-shaped plate (1105) facing the lower die (4) is connected with a second pressing plate (1106). The detection mechanism (12) includes arc-shaped plates (1201) installed at both ends of the front and rear end faces of the base (1). A rotating rod (1202) is rotatably connected to the opposite ends of the arc-shaped plates (1201). 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). A detection part is installed on the outer wall of the conveyor belt (1204). The light strip projector (14) emits light perpendicular to the bent sheet. At this time, the emission angle of the light can be obtained. Then, through quadrilateral calculation, subtracting two right angles can obtain the angle between the bent sheet and the lower die (4). Then, subtracting the two angles between the sheet and the lower die (4) from 360 degrees is the angle of the bent sheet. Then, through multi-point detection, the emission angle at which the light gradually tends to be stable is found. At this time, the sheet gradually reduces the springback phenomenon and tends to a static state, so that the angle detection is more accurate.

2. The angle detection device for a bending machine according to claim 1, characterized in that: The detection part includes a slider (13) connected to the outer wall of the conveyor belt (1204). One end of the slider (13) away from the lower die (4) is connected to the light strip projector (14) through an arc-shaped block. Cameras (15) with adjustable angles are installed at both ends of the light strip projector (14).

3. The angle detection device for a bending machine according to claim 1, characterized in that: Fixed plates (16) are connected to opposite ends of the arc-shaped plate (1201) on the same plane. The fixed plates (16) penetrate through both ends of the slider (13), and a sliding limit connection is formed between the fixed plates (16) and the slider (13).

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