Cutting device for steel member machining
By designing a cutting device for processing steel components including a rotating disc, a laser cutting gun head and a buffer spring, the problem of manual frequent adjustment of the position of steel components in the prior art is solved, and efficient steel component cutting and automatic discharge operations are realized.
Patent Information
- Application Number
- CN202510014417.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2045-01-06
AI Technical Summary
The existing cutting devices need to manually adjust the position of the steel members before and after cutting the steel members, resulting in a decrease in cutting efficiency.
A cutting device for processing steel components is designed, including a placement table, a feeding assembly, a cutting assembly and a receiving assembly. The feeding assembly realizes rapid positioning and adjustment of steel components through rotating discs and limiting slides. The cutting assembly realizes cutting at any position through laser cutting of the gun head and telescopic mount. The receiving assembly realizes automatic discharge of the material through buffer springs and conveyor belts.
It is achieved to improve the efficiency of feeding steel components while ensuring stable cutting, reduce the frequency of manual adjustment, and improve the overall cutting efficiency.
Smart Images

Figure CN119772402A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of cutting devices, and in particular to a cutting device for processing steel components. Background Art
[0002] Steel components refer to steel structure composite components that can bear and transfer loads and are connected by steel plates, angle steels, channel steels, I-beams, welded or hot-rolled H-shaped steels, cold-bent or welded, and connected by connectors. When processing steel components, it is necessary to cut the entire section of steel components into steel components of different lengths according to needs, such as a cutting device for steel component processing with patent announcement number CN216325884U. It includes a cutting machine frame and a cutting machine head, the cutting machine head is located at the tail end of the cutting machine frame, the cutting machine frame has a steel component feeding channel, a steel component positioning laser emitting end and a steel component positioning laser receiving end, the steel component feeding channel extends from the head end of the cutting machine frame to the tail end of the cutting machine frame, the steel component positioning laser emitting end is located on one side of the steel component feeding channel, the steel component positioning laser receiving end is located on the other side of the steel component feeding channel, the steel component positioning laser emitting end is aligned with the steel component positioning laser receiving end, and a steel component positioning camera is suspended above the cutting machine frame. The utility model can solve the problem of lack of equipment capable of quickly identifying and accurately judging the position of a steel structure.
[0003] However, although the existing cutting devices can accurately cut steel components during cutting operations, the length of the steel components before being cut is relatively long, which requires personnel to frequently adjust the position of the steel components during the cutting process, thereby causing the overall cutting efficiency to decrease. For this reason, the present application designs a cutting device for steel component processing, which can improve the efficiency of steel component feeding while ensuring stable cutting. Summary of the invention
[0004] In view of the deficiencies of the prior art, the present invention provides a cutting device for processing steel components, which solves the problem that the prior art cutting devices require frequent manual adjustment of the placement of the steel components before and after cutting.
[0005] To achieve the above object, the technical solution adopted by the present invention is:
[0006] A cutting device for processing steel components comprises a placement table, wherein a mounting groove is provided inside the placement table, a feeding assembly for fixing and feeding steel materials is rotatably installed inside the mounting groove, a cutting assembly for cutting steel materials is fixedly installed on the upper side of the placement table, a receiving assembly for receiving cut materials is fixedly installed on one side of the placement table, and a driving motor for driving the feeding assembly to rotate is installed on the other side of the placement table.
[0007] Preferably, the cutting assembly includes an extended top plate, which is fixedly mounted on one side of the upper end of the mounting platform, an xy movable platform for adjusting the cutting position is fixedly mounted on the lower surface of the extended top plate, a telescopic mounting seat for adjusting the cutting distance is fixedly mounted on the lower end of the xy movable platform, and a laser cutting gun head for cutting steel components is fixedly mounted on the lower end of the telescopic mounting seat.
[0008] Preferably, the receiving component includes an extension table, which is fixedly installed on one side of the placement table. A conveyor belt for sending out steel components is fixedly installed inside the extension table, and receiving tables for receiving steel components are respectively arranged on both sides of the extension table.
[0009] Preferably, connecting sockets are fixedly installed on the upper surfaces of both sides of the extension platform, and a connecting plug plate is fixedly installed on the bottom of the receiving platform. The connecting plug plate is movably connected to the connecting socket, and a buffer spring for buffering is installed between the connecting plug plate and the connecting socket.
[0010] Preferably, the feeding assembly includes a rotating disk, which is rotatably installed inside the mounting groove, and a material passage hole for the steel component to pass through is opened in the middle of the rotating disk, and limiting slide rails are respectively installed on both sides of the surface of the rotating disk, and a movable bracket is movably installed on the outer side of the limiting slide rail, and a positioning roller for fixing the steel component is arranged on one side of the movable bracket.
[0011] Preferably, the movable bracket is respectively provided with extended inclined plates on the upper and lower sides, a rotating seat is fixedly installed at one end of each extended inclined plate, a positioning roller is rotatably installed between every two rotating seats, and a connecting frame for synchronous movement is arranged between the movable brackets on both sides.
[0012] Preferably, a fixed platform is fixedly mounted on the upper side of one of the extending inclined plates, a first motor is fixedly mounted on the outer side of the fixed platform, and an output end of the first motor passes through a rotating seat and is fixedly connected to an adjacent positioning roller.
[0013] Preferably, grooves are respectively provided on both sides of the inner wall of the material passage hole, a cylinder is fixedly installed inside the grooves, a rotating seat is fixedly installed at the output end of the cylinder, and auxiliary rollers for auxiliary support of the steel structure are rotatably installed inside the rotating seat.
[0014] Preferably, a second motor and a bearing seat are fixedly installed on one side of the rotating disk, and a forward and reverse screw rod is fixedly installed on the output end of the second motor. The forward and reverse screw rod is rotatably connected to the bearing seat, and a threaded sleeve is fixedly installed on the upper end of the movable bracket on one side, and the forward and reverse screw rod shaft is threadedly matched with the threaded sleeve.
[0015] Preferably, a plurality of extended rotating grooves are respectively provided on the lower side of the installation rotating groove, and a transmission gear is rotatably installed inside each of the extended rotating grooves, one of the transmission gears is fixedly connected to the output end of the driving motor, and a plurality of matching tooth grooves are provided on the outer side of the rotating disk, and the matching tooth grooves are meshed with the transmission gear.
[0016] Compared with the prior art, the present invention has the following beneficial effects:
[0017] 1. When the steel component is transported to the specified position by the feeding assembly, the laser cutting gun head is started so that the laser cutting gun head has the cutting function, and the cutting position of the laser cutting gun head can be adjusted on the xy moving platform, so as to cooperate with the feeding assembly to achieve cutting at any position, and the distance between the telescopic mounting seat and the steel component can be adjusted through the telescopic mounting seat during cutting, so as to ensure that the corresponding depth of cutting can be performed according to the thickness of the material during cutting.
[0018] 2. When the steel structure is cut off, it will fall due to the action of gravity. When the steel structure falls, the buffer spring can support the connection plug plate to rise, so that the receiving platform will contact the steel structure first. When in contact, the buffer spring can be used to alleviate the impact force of the steel structure when it falls to a certain extent, so that when the subsequent steel structure falls to the conveyor belt, it will not cause impact on the conveyor belt. When falling, one end of the steel structure will be supported by the receiving platform, and the other end will be placed on the upper surface of the conveyor belt after being buffered, and the steel structure above will be brought out as the conveyor belt is conveyed, realizing automatic unloading operation.
[0019] 3. Place one end of the steel component into the material-passing hole, then start the cylinders on both sides, so that the rotating seat faces one end of the steel component and the auxiliary roller can fit the steel component, so as to achieve the initial positioning of the steel component and ensure that the steel component is located in the center of the material-passing hole, so as to ensure that the steel component will not have position deviation during subsequent rotation;
[0020] After the initial positioning, the second motor is started to drive the forward and reverse screws to rotate, and the limiting cooperation between the limiting slide rail and the movable bracket is utilized so that the rod body of the forward and reverse screws cooperates with the threaded sleeve to move the movable brackets on both sides inward, and the positioning rollers on both sides clamp the steel component, and cooperate with the auxiliary rollers to fix the steel component. In order to conveniently and quickly adjust the position of the steel component for rapid feeding and finding the cutting position, the first motor is started and the output end of the first motor is connected to one of the positioning rollers so that the positioning roller can drive the current steel component to move outward to realize automatic feeding operation. Compared with the existing cutting device, the present application not only ensures the stability of the steel component during cutting, but also can quickly adjust the steel component, so that the position of the steel component does not need to be frequently changed manually by personnel when being cut, thereby improving the cutting efficiency of the present application.
[0021] 4. By starting the driving motor, one of the transmission gears can be driven to rotate. When the transmission gear rotates, it will engage with the matching tooth groove on the outside of the rotating disk. The rotating disk is installed in the installation groove to realize the rotation of the rotating disk. The above structure can make the rotating disk rotate quickly. Through rotation, the cutting assembly can cut the steel structure for a circle without manually adjusting the cutting position. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;
[0023] Figure 2 is a schematic diagram of a three-dimensional structure from another viewing angle of the present invention;
[0024] Figure 3 It is a front view structural schematic diagram of the present invention;
[0025] Figure 4 yes Figure 3 Schematic diagram of the cross-section structure at AA in the middle;
[0026] Figure 5 yes Figure 3 Schematic diagram of the cross-section structure at BB in the middle;
[0027] Figure 6 yes Figure 3 Schematic diagram of the cross-section structure at CC;
[0028] Figure 7 It is a schematic diagram of the top view of the structure of the present invention;
[0029] Figure 8 yes Figure 7 Schematic diagram of the cross-section structure at DD in the middle;
[0030] Fig. 9 yes Figure 7 Schematic diagram of the cross-sectional structure at EE.
[0031] In the figure: 1, placement table; 2, cutting assembly; 201, extension top plate; 202, xy moving platform; 203, telescopic mounting seat; 204, laser cutting gun head; 3, receiving assembly; 301, extension table; 302, conveyor belt; 303, connection socket; 304, receiving table; 305, connection plug plate; 306, buffer spring; 4, feeding assembly; 401, rotating disk; 402, through hole; 403, groove; 4031, cylinder; 4032, rotary Swivel seat; 4033, auxiliary roller; 404, limit slide rail; 405, movable bracket; 4051, extension inclined plate; 4052, swivel seat; 4053, fixed table; 4054, first motor; 4055, positioning roller; 4056, connecting frame; 4057, threaded sleeve; 406, matching tooth groove; 407, bearing seat; 408, second motor; 409, forward and reverse screw rods; 5, install swivel groove; 6, drive motor; 7, expand swivel groove; 8, transmission gear. DETAILED DESCRIPTION
[0032] The following will be combined with 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.
[0033] like Figures 1 to 9 As shown, a cutting device for processing steel components includes a placement table 1, an installation groove 5 is opened inside the placement table 1, a feeding component 4 for fixing and feeding steel materials is rotatably installed inside the installation groove 5, a cutting component 2 for cutting steel materials is fixedly installed on the upper side of the placement table 1, a receiving component 3 for receiving cut materials is fixedly installed on one side of the placement table 1, and a driving motor 6 for driving the feeding component 4 to rotate is installed on the other side of the placement table 1.
[0034] In this embodiment, the cutting assembly 2 includes an extended top plate 201, which is fixedly mounted on one side of the upper end of the mounting table 1. An xy movable platform 202 for adjusting the cutting position is fixedly mounted on the lower surface of the extended top plate 201. A telescopic mounting seat 203 for adjusting the cutting distance is fixedly mounted at the lower end of the xy movable platform 202. A laser cutting gun head 204 for cutting steel components is fixedly mounted at the lower end of the telescopic mounting seat 203.
[0035] When the steel component is transported to the specified position by the feeding component 4, the laser cutting gun head 204 is started so that the laser cutting gun head 204 has the cutting function, and the cutting position of the laser cutting gun head 204 can be adjusted on the xy moving platform 202, so as to cooperate with the feeding component 4 to realize cutting at any position, and during cutting, the distance between the telescopic mounting seat 203 and the steel component can be adjusted through the telescopic mounting seat 203, so as to ensure that the corresponding depth of cutting can be performed according to the material thickness during cutting.
[0036] The receiving component 3 includes an extension platform 301, which is fixedly installed on one side of the placement platform 1. A conveyor belt 302 for delivering steel components is fixedly installed inside the extension platform 301, and receiving platforms 304 for receiving steel components are respectively arranged on both sides of the extension platform 301.
[0037] Connecting sockets 303 are fixedly installed on the upper surfaces of both sides of the extension platform 301, and connecting plug plates 305 are fixedly installed on the bottom of the receiving platform 304. The connecting plug plates 305 are movably connected to the connecting sockets 303, and buffer springs 306 for buffering are installed between the connecting plug plates 305 and the connecting sockets 303.
[0038] When the steel component is cut off, it will fall due to the action of gravity. When the steel component falls, the buffer spring 306 can support the connection plug plate 305 to rise, so that the receiving platform 304 will contact the steel component first. When in contact, the buffer spring 306 can alleviate the impact force of the steel component when it falls to a certain extent, so that when the subsequent steel component falls to the conveyor belt 302, it will not cause impact to the conveyor belt 302, and when falling, one end of the steel component will be supported by the receiving platform 304, and the other end will be placed on the upper surface of the conveyor belt 302 after being buffered, and the steel component above will be brought out as the conveyor belt 302 is conveyed, realizing automatic unloading operation.
[0039] It should be noted that the feeding assembly 4 includes a rotating disk 401, which is rotatably installed inside the mounting groove 5. A through hole 402 for the steel component to pass through is opened in the middle of the rotating disk 401. Limiting slide rails 404 are respectively installed on both sides of the surface of the rotating disk 401. A movable bracket 405 is movably installed on the outer side of the limiting slide rail 404. A positioning roller 4055 for fixing the steel component is provided on one side of the movable bracket 405.
[0040] In the present application, the upper and lower sides of the mobile bracket 405 are respectively installed with extended inclined plates 4051, and one end of each extended inclined plate 4051 is fixedly installed with a rotating seat 4052, and a positioning roller 4055 is rotatably installed between each two rotating seats 4052, and a connecting frame 4056 for synchronous movement is provided between the mobile brackets 405 on both sides;
[0041] A fixing platform 4053 is fixedly installed on the upper side of one of the extending inclined plates 4051 , a first motor 4054 is fixedly installed on the outer side of the fixing platform 4053 , and an output end of the first motor 4054 passes through the rotating seat 4052 and is fixedly connected to an adjacent positioning roller 4055 .
[0042] During the specific setting, a second motor 408 and a bearing seat 407 are fixedly installed on one side of the rotating disk 401, and a forward and reverse screw rod 409 is fixedly installed on the output end of the second motor 408. The forward and reverse screw rod 409 is rotatably connected to the bearing seat 407. A threaded sleeve 4057 is fixedly installed on the upper end of the movable bracket 405 on one side, and the shaft of the forward and reverse screw rod 409 is threadedly matched with the threaded sleeve 4057.
[0043] In the present application, grooves 403 are respectively provided on both sides of the inner wall of the material passage hole 402, and a cylinder 4031 is fixedly installed inside the groove 403. A rotating seat 4032 is fixedly installed at the output end of the cylinder 4031, and an auxiliary roller 4033 for auxiliary support of the steel structure is rotatably installed inside the rotating seat 4032.
[0044] In order to achieve fast transportation of the steel component while fixing it, one end of the steel component is placed in the material-passing hole 402, and then the cylinders 4031 on both sides are started, so that the rotating seat 4032 faces one end of the steel component, and the auxiliary rollers 4033 can fit the steel component, so as to achieve the initial positioning of the steel component, and ensure that the steel component is located at the center of the material-passing hole 402, so as to ensure that the steel component will not have position deviation during subsequent rotation. After the initial positioning, the second motor 408 is started to drive the forward and reverse screw rods 409 to rotate, wherein the limiting cooperation between the limiting slide rail 404 and the movable bracket 405 is utilized, so that the rod body of the forward and reverse screw rods 409 is threadedly matched with the threaded sleeve 4057, and the movable brackets 405 on both sides are fixed. It moves inward, and the positioning rollers 4055 on both sides clamp the steel component, and cooperate with the auxiliary roller 4033 to fix the steel component. In order to conveniently and quickly adjust the position of the steel component to facilitate rapid feeding and finding the cutting position, the first motor 4054 is started, and the output end of the first motor 4054 is connected to one of the positioning rollers 4055, so that the positioning roller 4055 can drive the current steel component to move outward to realize automatic feeding operation. Compared with the existing cutting device, the present application not only ensures the stability of the steel component during cutting, but also can quickly adjust the steel component, so that the position of the steel component does not need to be frequently changed manually by personnel when being cut, so that the cutting efficiency of the present application is improved.
[0045] In this embodiment, a plurality of extended rotating grooves 7 are respectively provided on the lower side of the installation rotating groove 5, and a transmission gear 8 is rotatably installed inside each extended rotating groove 7, one of which is fixedly connected to the output end of the driving motor 6, and a plurality of matching tooth grooves 406 are provided on the outer side of the rotating disk 401, which mesh with the transmission gear 8.
[0046] By starting the driving motor 6, one of the transmission gears 8 can be driven to rotate. When the transmission gear 8 rotates, it will engage with the matching tooth groove 406 on the outside of the rotating disk 401, wherein the rotating disk 401 is rotatably installed in the installation groove 5, thereby realizing the rotation of the rotating disk 401. Through the above structure, the rotating disk 401 can be rotated quickly, and the cutting component 2 can cut the steel structure for one circle through rotation without manually adjusting the cutting position.
[0047] The working principle of the cutting device for steel component processing:
[0048] When in use, firstly place one end of the steel component into the material passing hole 402, then start the cylinders 4031 on both sides, so that the rotating seat 4032 faces one end of the steel component, and the auxiliary roller 4033 can fit the steel component, so as to achieve the initial positioning of the steel component, and ensure that the steel component is located at the center of the material passing hole 402, so as to ensure that the steel component will not have position deviation during subsequent rotation;
[0049] Then, the second motor 408 is started to drive the forward and reverse screw rods 409 to rotate, wherein the limiting cooperation between the limiting slide rail 404 and the movable bracket 405 is utilized, so that the rod body of the forward and reverse screw rods 409 is threadedly engaged with the threaded sleeve 4057, and the movable brackets 405 on both sides are moved inward, and the positioning rollers 4055 on both sides clamp the steel component;
[0050] After the clamping is completed, the cutting position of the steel component needs to be positioned, wherein the first motor 4054 is started, and the output end of the first motor 4054 is connected to one of the positioning rollers 4055, so that the positioning roller 4055 can drive the current steel component to move outward, so that the cutting position of the steel component is located below the cutting assembly 2;
[0051] During the cutting process, the driving motor 6 is started to drive one of the transmission gears 8 to rotate. When the transmission gear 8 rotates, it will mesh with the matching tooth groove 406 on the outer side of the rotating disk 401. The rotating disk 401 is rotatably installed in the installation rotating groove 5, so as to realize the rotation of the rotating disk 401. The rotating disk 401 can be rotated quickly through the above structure, and the cutting assembly 2 can cut the steel component for one circle through rotation.
[0052] After the cutting is completed, the buffer spring 306 can support the connection plug plate 305 to rise, so that the receiving platform 304 will contact the steel component first. When in contact, the buffer spring 306 can be used to alleviate the impact force of the steel component when it falls to a certain extent, and then the conveyor belt 302 is used to transport the steel component out.
[0053] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.
Claims
1. A cutting device for processing steel components, comprising a placement table (1), characterized in that: The mounting table (1) is provided with a mounting groove (5) inside which a feeding assembly (4) for fixing and feeding steel materials is rotatably mounted. A cutting assembly (2) for cutting steel materials is fixedly mounted on the upper side of the mounting table (1). A receiving assembly (3) for receiving cut materials is fixedly mounted on one side of the mounting table (1). A driving motor (6) for driving the feeding assembly (4) to rotate is mounted on the other side of the mounting table (1).
2. A cutting device for processing steel components according to claim 1, characterized in that: The cutting assembly (2) comprises an extended top plate (201), the extended top plate (201) being fixedly mounted on one side of the upper end of the placement platform (1), an xy movable platform (202) for adjusting the cutting position being fixedly mounted on the lower surface of the extended top plate (201), a telescopic mounting seat (203) for adjusting the cutting distance being fixedly mounted on the lower end of the xy movable platform (202), and a laser cutting gun head (204) for cutting steel components being fixedly mounted on the lower end of the telescopic mounting seat (203).
3. A cutting device for processing steel members according to claim 1, characterized in that: The receiving assembly (3) comprises an extension platform (301), the extension platform (301) is fixedly mounted on one side of the placement platform (1), a conveyor belt (302) for delivering steel components is fixedly mounted inside the extension platform (301), and receiving platforms (304) for receiving steel components are respectively arranged on both sides of the extension platform (301).
4. A cutting device for processing steel members according to claim 3, characterized in that: Connecting sockets (303) are fixedly mounted on the upper surfaces of both sides of the extension platform (301), a connecting plug plate (305) is fixedly mounted on the bottom of the receiving platform (304), the connecting plug plate (305) is movably connected to the connecting socket (303), and a buffer spring (306) for buffering is installed between the connecting plug plate (305) and the connecting socket (303).
5. A cutting device for processing steel components according to claim 1, characterized in that: The feeding assembly (4) comprises a rotating disk (401), the rotating disk (401) is rotatably mounted inside the mounting rotating groove (5), a through hole (402) for the steel component to pass through is opened in the middle of the rotating disk (401), limiting slide rails (404) are respectively mounted on both sides of the surface of the rotating disk (401), a movable bracket (405) is movably mounted on the outer side of the limiting slide rail (404), and a positioning roller (4055) for fixing the steel component is arranged on one side of the movable bracket (405).
6. A cutting device for processing steel members according to claim 5, characterized in that: The movable bracket (405) is respectively provided with an extended inclined plate (4051) on the upper and lower sides, and a rotating seat (4052) is fixedly installed at one end of each of the extended inclined plates (4051). A positioning roller (4055) is rotatably installed between every two rotating seats (4052), and a connecting frame (4056) for synchronous movement is provided between the movable brackets (405) on both sides.
7. A cutting device for processing steel members according to claim 6, characterized in that: A fixed platform (4053) is fixedly installed on the upper side of one of the extending inclined plates (4051), and a first motor (4054) is fixedly installed on the outer side of the fixed platform (4053). The output end of the first motor (4054) passes through the rotating seat (4052) and is fixedly connected to the adjacent positioning roller (4055).
8. A cutting device for processing steel members according to claim 5, characterized in that: Grooves (403) are respectively provided on both sides of the inner wall of the material passage hole (402), a cylinder (4031) is fixedly installed inside the groove (403), a rotating seat (4032) is fixedly installed at the output end of the cylinder (4031), and an auxiliary roller (4033) for auxiliary support of the steel component is rotatably installed inside the rotating seat (4032).
9. A cutting device for processing steel members according to claim 6, characterized in that: A second motor (408) and a bearing seat (407) are fixedly mounted on one side of the rotating disk (401), and a forward and reverse screw rod (409) is fixedly mounted on the output end of the second motor (408). The forward and reverse screw rod (409) is rotatably connected to the bearing seat (407). A threaded sleeve (4057) is fixedly mounted on the upper end of the movable bracket (405) on one side, and the rod body of the forward and reverse screw rod (409) is threadedly matched with the threaded sleeve (4057).
10. A cutting device for processing steel members according to claim 5, characterized in that: A plurality of expansion grooves (7) are respectively provided on the lower side of the installation groove (5), and a transmission gear (8) is rotatably installed inside each of the expansion grooves (7), one of the transmission gears (8) is fixedly connected to the output end of the drive motor (6), and a plurality of matching tooth grooves (406) are provided on the outer side of the rotating disk (401), and the matching tooth grooves (406) are meshed with the transmission gear (8).
Citation Information
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