Neodymium iron boron centralized chamfering screening device and method

Abstract

The invention belongs to the technical field of neodymium iron boron machining, and particularly relates to a neodymium iron boron centralized chamfering and screening device and method.The device comprises a lifting unit, a chamfering unit, an automatic screening unit, a conveying unit and a travelling crane carrying unit; the chamfering unit comprises at least two chamfering machines which are arranged in sequence, the travelling crane carrying unit is arranged above the chamfering unit, and the travelling crane carrying unit is used for feeding the chamfering machines; the lifting unit is arranged at one end of the chamfering unit, and the lifting unit is used for feeding the travelling crane carrying unit; the conveying unit is arranged on one side of the chamfering unit, and the conveying unit is arranged on one side of the discharging end of the chamfering machine. The automatic screening unit is arranged on one side of the lifting unit, and the automatic screening unit is arranged at the discharging end of the conveying unit. According to the automatic grinding machine, automatic discharging, conveying, screening and feeding operation of grinding materials is achieved, the working efficiency is greatly improved, and the defects caused by manual operation are reduced.

Description

Technical Field

[0001] The invention relates to a concentrated chamfering screening device and method for NdFeB, belonging to the technical field of NdFeB processing. Background Art

[0002] NdFeB permanent magnet materials have the advantages of excellent magnetic properties, high cost performance and rich resource reserves, so they have quickly entered the industrialized society. NdFeB contains a large amount of rare earth elements neodymium, iron and boron. Its characteristics are hard and brittle. NdFeB has good mechanical properties. Sintered NdFeB permanent magnet materials have excellent magnetic properties. The application fields cover many industries such as modern home appliances, industrial motors, microelectronic motors, and new energy vehicles. The chemical properties of NdFeB materials are active and the edges of the products processed from them are sharp. In order to better use the products, it is necessary to electroplate a protective film such as zinc or nickel layer on its surface. In order to overcome the edge effect in the electroplating process, reduce the problem of poor edge plating, and prevent bumps due to sharp edges, it is necessary to chamfer the NdFeB products before electroplating to make the edges of the NdFeB products smooth, so that zinc or nickel layers can be better electroplated on the edges of the products.

[0003] When NdFeB products are chamfered, hundreds of kilograms of abrasives need to be run together with the products on the chamfering machine. At present, most of the chamfering in the NdFeB industry is done by a single chamfering machine. The abrasives from the chamfering machine need to be manually screened. Qualified abrasives can be recycled and reused, while unqualified abrasives need to be centrally discarded. At present, the operation process of chamfering NdFeB products is as follows: manually move the chamfering abrasive to the chamfering platform, shovel about 100 kilograms of abrasives into the chamfering machine on the chamfering platform, manually set the chamfering machine operation process, and then start the equipment. After the chamfering machine is finished running according to the program setting, the worker manually stops the equipment, and then sends the abrasive to the screening frame, manually screens the product and abrasive, and after the screening is completed, manually restores the chamfering machine to its original state for the next round of repeated movement. This method is inefficient and labor-intensive, requiring more than 5 tons of abrasives to be moved every day. There is a lack of necessary safety distance between the chamfering machine and the operator; the operator performs repeated mechanical movements for a long time, which is easy to cause inattention and safety accidents. Therefore, a concentrated chamfer screening device and method for NdFeB is needed. Summary of the invention

[0004] In view of the defects of the prior art, the present invention provides a concentrated chamfering screening device and method for NdFeB.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] One of the objects of the present invention is to provide a concentrated chamfering and screening device for NdFeB, comprising a lifting unit, a chamfering unit, an automatic screening unit, a conveying unit and a crane carrying unit; the chamfering unit comprises at least two chamfering machines arranged in sequence, the crane carrying unit is arranged above the chamfering unit, and the crane carrying unit is used to load the chamfering machine; the lifting unit is arranged at one end of the chamfering unit, and the lifting unit is used to load the crane carrying unit; the conveying unit is arranged on one side of the chamfering unit, and the conveying unit is arranged on one side of the discharging end of the chamfering machine; the automatic screening unit is arranged on one side of the lifting unit, and the automatic screening unit is arranged at the discharging end of the conveying unit; the conveying unit is used to convey the products and abrasives discharged from the chamfering machine after chamfering is completed to the automatic screening unit, and the automatic screening unit is used to screen products, qualified abrasives and unqualified abrasives, and the qualified abrasives are discharged to the lifting unit.

[0007] The beneficial effect of the NdFeB centralized chamfering and screening device of the present invention is as follows: the present invention realizes synchronous chamfering of multiple chamfering machines through the chamfering unit, and the products and abrasives after the chamfering machine is completed are transported to the automatic screening unit through the conveying unit to realize automatic screening of products and abrasives, and qualified abrasives are recovered and transported to the crane carrying unit through the lifting unit, and the crane carrying unit transports the abrasives to the chamfering machine where abrasives need to be added, thereby realizing automatic discharging, transportation, screening and loading operations of abrasives, having the advantages of intelligence and high degree of automation, greatly improving work efficiency, and reducing the disadvantages brought by manual operation.

[0008] On the basis of the above technical solution, the present invention can also make the following improvements:

[0009] Furthermore, the lifting unit comprises a lifting frame, on which an abrasive box and a lifting power mechanism are arranged, and the lifting power mechanism drives the abrasive box to perform lifting movements on the lifting frame.

[0010] Furthermore, the upper end of the abrasive box is open, a discharge port is provided on the side of the abrasive box, a discharge baffle is provided on the discharge port, and a baffle opening and closing power mechanism is provided on the abrasive box, and the baffle opening and closing power mechanism drives the discharge baffle to open or close.

[0011] The beneficial effect of adopting the above-mentioned further technical scheme is that the upper end of the abrasive box is open, which facilitates the automatic screening unit to slide the qualified abrasive obtained by screening into the abrasive box. The side of the abrasive box is provided with a discharge port, which is used to open the baffle through the baffle opening and closing power mechanism after the lifting power mechanism drives the abrasive box to rise into place, so that the abrasive can slide from the discharge port of the abrasive box into the traveling funnel of the traveling transport unit.

[0012] Furthermore, the lifting frame is provided with a discharging slide plate, and the discharging slide plate is arranged toward the traveling transport unit, and the bottom plate of the abrasive box is inclined or the inner side wall of the bottom plate of the abrasive box has an inclined angle.

[0013] The beneficial effect of adopting the above-mentioned further technical solution is that: the bottom plate of the abrasive box is tilted or the inner side wall of the bottom plate of the abrasive box has an inclined angle. When the discharge baffle of the abrasive box discharge port is opened, the abrasive in the abrasive box slides along the bottom plate, slides out from the discharge port, and slides into the traveling funnel of the traveling transport unit under the guidance of the discharge slide plate, making the loading process of the lifting unit simpler and more convenient, without the need for manual operation.

[0014] Furthermore, the automatic screening unit comprises a screening rack, and the screening rack is provided with a product screen plate, a qualified abrasive screen plate and an unqualified abrasive screen plate in sequence from top to bottom, and the output end of the qualified abrasive screen plate is arranged toward the lifting unit.

[0015] Furthermore, the three-layer structure of the automatic screening unit adopts different screening methods. The product screen plate of the first layer adopts a straight mesh plate with a mesh hole diameter of φR1; the qualified abrasive screen plate of the second layer adopts a stainless steel column, and adjacent columns are separated by a uniform interval of φR2; the unqualified abrasive screen plate of the third layer is a straight stainless steel plate.

[0016] Furthermore, R1<Rmin; and 3*R1>4*R2, wherein the maximum diameter or length of the product is Rmax, and the minimum diameter or width is Rmin. When the material is a square piece, the maximum is the length, and the minimum is the width.

[0017] The beneficial effect of adopting the above-mentioned further technical scheme is: abrasives with a particle size smaller than φR1 flow along the mesh of the product sieve plate into the qualified abrasive sieve plate of the second layer, and the product slides from the product sieve plate into the product container; abrasives with a particle size smaller than the column interval φR2 are considered unqualified abrasives, and flow from the qualified abrasive sieve plate of the second layer into the unqualified abrasive sieve plate of the third layer, and the qualified abrasives (particle size φR2-φR1) slide along the column into the abrasive box of the lifting unit, and the unqualified abrasives slide along the unqualified abrasive sieve plate into the unqualified abrasive container.

[0018] Furthermore, the crane transport unit includes a crane frame, a crane power mechanism, a crane hopper arranged on the crane frame, and a material-dropping cylinder arranged on the crane hopper. The crane power mechanism drives the crane hopper to slide on the crane frame, and the material-dropping cylinder controls the crane hopper to drop materials.

[0019] The beneficial effect of adopting the above-mentioned further technical scheme is: the crane funnel is arranged above the chamfering unit through the crane frame, and the crane power mechanism drives the crane funnel to slide on the crane frame, so as to deliver the abrasive to each chamfering machine of the chamfering unit, and the opening of the gate valve of the crane funnel is controlled by the blanking cylinder to accurately control the speed and weight of the abrasive descent, thereby completing the abrasive loading process of the chamfering machine.

[0020] Furthermore, the conveying unit includes a conveying belt and a conveying driving mechanism, the conveying driving mechanism drives the conveying belt to rotate, and the discharge end of the conveying belt is arranged above the automatic screening unit.

[0021] The beneficial effect of adopting the above-mentioned further technical scheme is: after the chamfering machine completes the chamfering operation, the product and abrasive are dumped onto the conveyor belt, and the conveyor belt is driven to rotate by the conveying drive mechanism, so as to transport the product and abrasive to the automatic screening unit. The discharge end of the conveyor belt is arranged above the automatic screening unit. After the product and abrasive are transported to the discharge end of the conveyor belt, they directly fall into the automatic screening unit.

[0022] Furthermore, the conveyor belt is made of polyurethane, partitions are arranged at intervals on the conveyor belt, and corrugated baffles are arranged on both sides of the conveyor belt, and the baffles are made of polyurethane.

[0023] The beneficial effects of adopting the above further technical solution are: the conveyor belt is made of polyurethane soft material to avoid the edge knocking during the falling process of the product, and the conveyor belt is provided with partitions at intervals, and the interval of the partitions is L, which satisfies: L>3*Rmax (example: L is 30 cm). The products and abrasives can be evenly separated by setting partitions, and wavy baffles are used on both sides of the conveyor belt. The wavy baffles can be integrally formed with the conveyor belt. On the one hand, it can prevent the products and abrasives from falling into the conveyor belt and flowing out from both sides, and on the other hand, it ensures that the baffles are firm and reliable.

[0024] Furthermore, the height of the baffle plate is H, satisfying: Rmin<H<2*Rmin, where Rmin is the minimum diameter or width of the product.

[0025] The second object of the present invention is to provide a method for concentrated chamfering and screening of NdFeB, which adopts the above-mentioned concentrated chamfering and screening device of NdFeB, and specifically comprises the following steps:

[0026] ①When starting for the first time, put the abrasive into the abrasive box, lift the abrasive box to the same height as the hopper of the crane transport unit through the lifting unit, the baffle opening and closing power mechanism drives the discharge baffle to open, and the abrasive slides into the hopper of the crane transport unit. The hopper is driven by the crane power mechanism to transport the abrasive to each chamfering machine. The product is automatically lifted to the top of the chamfering machine by the hydraulic trolley and then dumped into the chamfering machine;

[0027] ② The chamfering machine grinds the product according to the frequency set by the control system. The grinding time is 110-120 minutes and the grinding is carried out in four stages;

[0028] ③ After the chamfering machine is finished grinding, the control system controls the chamfering machine to dump the abrasive and products onto the conveyor belt of the conveying unit. Driven by the conveying drive mechanism, the conveyor belt transports the abrasive and products to the automatic screening unit. The abrasive and products fall from the discharge end of the conveyor belt onto the product screen plate of the automatic screening unit.

[0029] ④ The automatic screening unit (4) screens the product and the abrasive in sequence, the abrasive falls from the mesh of the product screen plate, the product remains on the product screen plate and slides from the product screen plate into the product container, the unqualified abrasive is screened out from the qualified abrasive screen plate and flows into the unqualified abrasive screen plate, the qualified abrasive remains on the qualified abrasive screen plate and slides from the qualified abrasive screen plate into the abrasive box (14) of the lifting unit (1); the unqualified abrasive slides from the unqualified abrasive screen plate into the unqualified abrasive container;

[0030] ⑤ The qualified abrasives after the above screening are automatically weighed in the abrasive box, and the lifting unit lifts the abrasives to the same height as the traveling funnel of the traveling transport unit, and repeats the above steps ① to ④.

[0031] The beneficial effects of the present invention are as follows: after the chamfering machine of the present invention is completed, the control system controls the chamfering machine to automatically descend and dump the product and abrasive, thereby reducing the number of personnel operating the equipment and reducing the labor intensity of operation; the product and abrasive dumped by the chamfering machine are sent to the automatic screening unit through the conveying unit to complete the three-layer screening of the product layer, the qualified abrasive layer, and the unqualified abrasive layer; the entire process of the present invention does not require excessive manual operation, and realizes the automatic discharging, transportation, screening and discharging operations of the abrasive, has the advantages of high intelligence and automation, and can significantly improve work efficiency. Compared with manual operation, the work efficiency is greatly improved, and the product edge breakage rate is reduced by 90%. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a front view of the present invention;

[0033] Figure 2 A top view of the present invention;

[0034] Figure 3 It is the main view of the lifting unit;

[0035] Figure 4 It is the structural schematic diagram of the driving funnel;

[0036] Figure 5 It is the structural diagram of the hydraulic station;

[0037] Figure 6It is a top view of the automatic screening unit;

[0038] Figure 7 Schematic diagram of the local structure of the conveyor belt.

[0039] The accompanying drawings are marked as follows: 1. Lifting unit; 11. Lifting frame; 12. Hydraulic cylinder; 13. Lifting guide rail; 14. Abrasive box; 15. Baffle opening and closing cylinder; 16. Discharging slide plate; 17. Transmission frame; 18. Roller; 2. Hydraulic station; 22. Oil pump; 23. Oil tank; 24. Control valve; 3. Chamfering unit; 31. Chamfering machine; 4. Automatic screening unit; 5. Conveying unit; 51. Conveyor belt; 52. Baffle plate; 6. Crane carrying unit; 61. Crane hopper; 62. Crane guide rail; 63. Gate valve; 64. Dropping cylinder; 65. Vertical frame; 66. Horizontal frame; 67. Crane power motor. DETAILED DESCRIPTION

[0040] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0041] See also Figure 1-5 A concentrated chamfering and screening device for NdFeB includes a lifting unit 1, a chamfering unit 3, an automatic screening unit 4, a conveying unit 5 and a crane carrying unit 6; the chamfering unit 3 includes at least two chamfering machines 31 arranged in sequence, the crane carrying unit 6 is arranged above the chamfering unit 3, and the crane carrying unit 6 is used to load the chamfering machine 31; the lifting unit 1 is arranged at one end of the chamfering unit 3, and the lifting unit 1 is used to load the crane carrying unit 6; the conveying unit 5 is arranged on one side of the chamfering unit 3, and the conveying unit 5 is arranged on one side of the discharging end of the chamfering machine 31; the automatic screening unit 4 is arranged on one side of the lifting unit 1, and the automatic screening unit 4 is arranged at the discharging end of the conveying unit 5; the conveying unit 5 is used to convey the products and abrasives discharged from the chamfering machine 31 after chamfering is completed to the automatic screening unit 4, and the automatic screening unit 4 is used to screen products, qualified abrasives and unqualified abrasives, and the qualified abrasives are discharged to the lifting unit 1.

[0042] The lifting unit 1 includes a lifting frame 11, on which an abrasive box 14 and a lifting power mechanism are provided. The lifting power mechanism drives the abrasive box 14 to perform lifting movements on the lifting frame 11. The lifting power mechanism includes a hydraulic cylinder 12, and the piston rod end of the hydraulic cylinder 12 is transmission-connected to the abrasive box 14. Specifically, a transmission frame 17 and a lifting guide rail 13 are provided on the lifting frame 11. Two lifting guide rails 13 are symmetrically provided. The two lifting guide rails 13 are arranged along the height direction of the lifting frame 11. Both ends of the transmission frame 17 are slidably mounted on the lifting guide rails 13 through rollers 18. A chain is provided on the transmission frame 17 through a bearing (Figure 14). (not shown), the chain is symmetrically provided with two chains, one end of the chain is fixed on the lifting frame 11, and the other end of the chain bypasses the bearing and is connected to the abrasive box 14; the piston rod end of the hydraulic cylinder 12 is connected to the transmission frame 17, and the power of the hydraulic cylinder 12 comes from the hydraulic station 2, the hydraulic station 2 includes an oil pump 22, an oil tank 23 and a control valve 24, the oil tank 23 is connected to the hydraulic cylinder 12 through an oil pipe, the oil pump 22 provides flow and pressure, and transports the hydraulic oil to the hydraulic cylinder 12; the oil tank 23 is a place for storing hydraulic oil; the control system controls the flow and pressure of the hydraulic oil through the control valve 24, thereby controlling the movement of the hydraulic cylinder 12.

[0043] The upper end of the abrasive box 14 is open, and a discharge port is provided on the side of the abrasive box 14. A discharge baffle is provided at the discharge port. The abrasive box 14 is provided with a baffle opening and closing power mechanism, and the baffle opening and closing power mechanism drives the discharge baffle to open or close. Specifically, the baffle opening and closing power mechanism in the embodiment of the present invention is a baffle opening and closing cylinder 15, and the baffle opening and closing cylinder 15 is installed on the abrasive box 14. The end of the baffle opening and closing cylinder 15 is connected to the discharge baffle, and the discharge baffle is slidably installed on the abrasive box 14.

[0044] The lifting frame 11 is provided with a discharging slide plate 16 , and the discharging slide plate 16 is arranged toward the traveling transport unit 6 . The bottom plate of the abrasive box 14 is arranged tilted or the inner side wall of the bottom plate of the abrasive box 14 has an inclined angle.

[0045] The automatic screening unit 4 comprises a screening frame, which is provided with a product screen plate, a qualified abrasive screen plate and an unqualified abrasive screen plate in sequence from top to bottom, and the output end of the qualified abrasive screen plate is arranged toward the lifting unit 1; specifically, the three-layer structure of the automatic screening unit 4 of the embodiment of the present invention adopts different screening methods, the product screen plate of the first layer adopts a straight mesh plate, and the mesh plate hole diameter is φR1, and the abrasive with a particle size smaller than φR1 flows along the mesh holes of the product screen plate into the qualified abrasive screen plate of the second layer, and the product slides from the product screen plate into the product container; the qualified abrasive screen plate of the second layer adopts a stainless steel column, and adjacent columns are separated by a uniform interval of φR2, and the abrasive with a particle size smaller than the column interval φR2 is considered to be unqualified abrasive, and the unqualified abrasive flows from the qualified abrasive screen plate of the second layer into the unqualified abrasive screen plate of the third layer, and the qualified The abrasive (particle size φR2-φR1) slides along the cylinder into the abrasive box 14 of the lifting unit 1. In this embodiment, the maximum diameter or length of the product is Rmax, and the minimum diameter or width is Rmin. When the product is a square piece, the maximum is the length and the minimum is the width. The product screen plate and the qualified abrasive screen plate need to meet the following conditions: R1<Rmin, and 3*R1>4*R2. In the embodiment of the present invention, as an example, R1=8mm, R2=5mm, that is, the mesh hole diameter of the product screen plate is φ8, and the adjacent cylinders of the qualified abrasive screen plate are evenly separated by φ5; the unqualified abrasive screen plate of the third layer is a straight stainless steel plate, and the unqualified abrasive slides along the unqualified abrasive screen plate into the unqualified abrasive container; in order to facilitate the discharge of the three-layer screen plate, the discharge ends of the three-layer screen plate are provided with inclined sliding plates. In order to facilitate the discharge of materials on each layer of sieve plate, the product sieve plate, qualified abrasive sieve plate and unqualified abrasive sieve plate are respectively provided with a discharge funnel, and the discharge funnel is tilted. The product sieve plate, qualified abrasive sieve plate and unqualified abrasive sieve plate are all tilted toward the discharge funnel arranged thereon. The discharge funnel of the qualified abrasive sieve plate is arranged toward the lifting unit 1, so as to facilitate the material to slide down under the action of vibration and gravity.

[0046] The crane transport unit 6 includes a crane frame, a crane power mechanism, a crane hopper 61 arranged on the crane frame, and a material-dropping cylinder 64 arranged on the crane hopper 61. The crane power mechanism drives the crane hopper 61 to slide on the crane frame, and the material-dropping cylinder 64 controls the crane hopper 61 to drop materials. Specifically, the crane frame of the embodiment of the present invention includes a vertical frame 65 and a horizontal frame 66, the vertical frame 65 supports the horizontal frame 66 and is erected above the chamfering unit 3, the horizontal frame 66 is symmetrically provided with crane guide rails 62, the two sides of the crane funnel 61 are slidably arranged on the crane guide rails 62 through rollers 18, the crane power mechanism includes a crane power motor 67, the crane power motor 67 is arranged on the crane funnel 61, the output end of the crane power motor 67 is provided with a driving wheel, the side of the crane funnel 61 is provided with a transmission wheel, and the driving wheel is connected to the transmission wheel through a belt drive; a gate valve 63 is provided under the crane funnel 61, the blanking cylinder 64 is transmission-connected to the gate valve 63, the opening of the gate valve 63 of the crane funnel 61 is controlled by the blanking cylinder 64, the speed and weight of the abrasive descent are accurately controlled, and the abrasive loading process of the chamfering machine 31 is completed.

[0047] The conveying unit 5 includes a conveying belt 51 and a conveying driving mechanism. The conveying driving mechanism drives the conveying belt 51 to rotate. The discharging end of the conveying belt 51 is arranged above the automatic screening unit 4 .

[0048] The conveyor belt 51 is made of polyurethane. Since polyurethane is soft, the conveyor belt 51 made of polyurethane can effectively avoid the problem of edge knocking during the falling process of the product. The conveyor belt 51 is provided with partitions (not shown in the figure) at intervals. The interval between the partitions is preferably 30 cm. The products and abrasives can be evenly separated by setting the partitions. Wave-shaped baffle plates 52 are provided on both sides of the conveyor belt 51. The baffle plates 52 are made of polyurethane. The wave-shaped baffle plates 52 and the conveyor belt 51 can be integrally formed. On the one hand, it can prevent the products and abrasives from falling into the conveyor belt 51 and then flowing out from both sides. On the other hand, it ensures that the baffle plates 52 are firm and reliable. Furthermore, the height of the baffle plates 52 is 8-10 mm, which can play a good blocking effect on the products and abrasives.

[0049] A method for screening concentrated chamfering of NdFeB magnets, using the above-mentioned concentrated chamfering screening device for NdFeB magnets, specifically comprises the following steps:

[0050] ① When starting for the first time, put the abrasive into the abrasive box 14, and lift the abrasive box 14 to the same height as the traveling funnel 61 of the traveling transport unit 6 through the lifting unit 1. The baffle opening and closing power mechanism drives the discharge baffle to open, and the abrasive slides down to the traveling funnel 61 of the traveling transport unit 6 under the action of gravity. The traveling funnel 61 is driven by the traveling power mechanism to transport the abrasive to each chamfering machine 31; the product loading is automatically lifted to the upper part of the chamfering machine 31 by the hydraulic trolley, and then dumped into the chamfering machine 31;

[0051] ② The chamfering machine 31 grinds the product according to the frequency set by the control system, and the grinding time is 110-120 minutes. For example, the grinding time of the chamfering machine 31 in the embodiment of the present invention is 120 minutes, and the grinding is carried out in four stages, wherein the frequency set in each stage is: the first stage (the first 5 minutes) is operated at a frequency of 10Hz, the second stage (the 5th to 30th minutes) is operated at a frequency of 25Hz, the third stage (the 30th to 100th minutes) is operated at 40Hz, and the fourth stage (the 100th to 120th minutes) is operated at 5Hz; the chamfering machine 31 grinding operation process adopts a multi-frequency method to ensure the product qualification rate and stability;

[0052] ③ After the chamfering machine 31 is finished grinding, the control system controls the chamfering machine 31 to dump at a frequency of 10-50Hz. As an example, the chamfering machine 31 of the embodiment of the present invention dumps at a frequency of 30Hz, and dumps the abrasive and the product onto the conveyor belt 51 of the conveying unit 5. Driven by the conveying drive mechanism, the conveyor belt 51 transports the abrasive and the product to the automatic screening unit 4. The speed of the conveyor belt 51 is controlled by the control system, and the speed of the conveyor belt 51 is set to be adjustable at 1-50m / min. As an example, the speed of the conveyor belt 51 of the embodiment of the present invention is 25m / min, and the abrasive and the product fall from the discharge end of the conveyor belt 51 to the product screen plate of the automatic screening unit 4. The automatic chamfering machine 31 runs for 10-15 minutes, and 150-200 kg of material and 200-300 kg of abrasive are dumped each time. As an example, the automatic chamfering machine of the embodiment of the present invention runs for 15 minutes, and 200 kg of material and 300 kg of abrasive are dumped each time.

[0053] ④ The automatic screening unit 4 screens the product and the abrasive in turn. The abrasive with a particle size smaller than φ8 falls from the mesh of the product screen plate and flows into the qualified abrasive screen plate. The product remains on the product screen plate and slides from the product screen plate into the product container. The abrasive with a particle size smaller than φ5 is screened out from the qualified abrasive screen plate and flows into the unqualified abrasive screen plate. The qualified abrasive remains on the qualified abrasive screen plate and slides from the qualified abrasive screen plate into the abrasive box 14 of the lifting unit 1; the abrasive with a particle size smaller than φ5 slides from the unqualified abrasive screen plate into the unqualified abrasive container;

[0054] ⑤ The qualified abrasives after the above screening are automatically weighed in the abrasive box 14, and the lifting unit 1 lifts 300-350 kg of abrasive to the same height as the traveling funnel 61 of the traveling transport unit 6, and repeats the above steps ① to ④. As an example, the lifting unit 1 of the embodiment of the present invention lifts 300 kg of abrasive each time.

[0055] The control system of the present invention can be a PLC control system.

[0056] The present invention can realize chamfering of multiple chamfering machines 31 simultaneously or successively. When a certain chamfering machine 31 needs abrasive, the weight of abrasive required by the chamfering machine 31 is set according to the PLC control system, and the driving funnel 61 automatically moves to the top of the chamfering machine 31 that needs abrasive according to the instruction of the PLC control system, and the required abrasive in the driving funnel 61 falls into the automatic chamfering machine 31. The required abrasive weight can be obtained by setting a weighing mechanism on the qualified abrasive sieve plate of the automatic screening unit 4, or setting a weighing mechanism on the abrasive box 14 of the lifting unit 1, and conveying a set weight of abrasive to the driving funnel 61 through the weighing mechanism, and then conveying the abrasive to the chamfering machine 31 through the driving funnel 61.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A NdFeB centralized chamfering screening device, It is characterized in that The invention comprises a lifting unit (1), a chamfering unit (3), an automatic screening unit (4), a conveying unit (5) and a crane transport unit (6); the chamfering unit (3) comprises at least two chamfering machines (31) arranged in sequence, the crane transport unit (6) is arranged above the chamfering unit (3), and the crane transport unit (6) is used to load materials to the chamfering machine (31); the lifting unit (1) is arranged at one end of the chamfering unit (3), and the lifting unit (1) is used to load materials to the crane transport unit (6); the conveying unit (5) is arranged at the The chamfering unit (3) is arranged on one side of the chamfering machine (31), and the conveying unit (5) is arranged on one side of the discharging end of the chamfering machine (31); the automatic screening unit (4) is arranged on one side of the lifting unit (1), and the automatic screening unit (4) is arranged at the discharging end of the conveying unit (5); the conveying unit (5) is used to convey the product and abrasive discharged after the chamfering of the chamfering machine (31) is completed to the automatic screening unit (4); the automatic screening unit (4) is used to screen the product, qualified abrasive and unqualified abrasive, and the qualified abrasive is discharged to the lifting unit (1).

2. The NdFeB concentrated chamfering screening device according to claim 1, It is characterized in that The lifting unit (1) comprises a lifting frame (11), on which an abrasive box (14) and a lifting power mechanism are arranged, and the lifting power mechanism drives the abrasive box (14) to perform lifting movement on the lifting frame (11).

3. The NdFeB concentrated chamfering screening device according to claim 2, It is characterized in that The upper end of the abrasive box (14) is open, a discharge port is provided on the side of the abrasive box (14), a discharge baffle is provided on the discharge port, and a baffle opening and closing power mechanism is provided on the abrasive box (14), and the baffle opening and closing power mechanism drives the discharge baffle to open or close.

4. The NdFeB concentrated chamfering screening device according to claim 3, It is characterized in that The lifting frame (11) is provided with a discharging slide plate (16), and the discharging slide plate (16) is arranged toward the traveling transport unit (6). The bottom plate of the abrasive box (14) is arranged obliquely or the inner side wall of the bottom plate of the abrasive box (14) has an inclined angle.

5. The NdFeB centralized chamfering and screening device according to claim 4, It is characterized in that The automatic screening unit (4) comprises a screening frame, on which a product screen plate, a qualified abrasive screen plate and an unqualified abrasive screen plate are arranged in sequence from top to bottom, and an output end of the qualified abrasive screen plate is arranged toward the lifting unit (1).

6. The NdFeB concentrated chamfering screening device according to claim 5, It is characterized in that The crane transport unit (6) comprises a crane frame, a crane power mechanism, a crane hopper (61) arranged on the crane frame, and a material dropping cylinder (64) arranged on the crane hopper (61); the crane power mechanism drives the crane hopper (61) to slide on the crane frame, and the material dropping cylinder (64) controls the crane hopper (61) to drop materials.

7. The NdFeB concentrated chamfering screening device according to claim 6, It is characterized in that The conveying unit (5) comprises a conveying belt (51) and a conveying drive mechanism, wherein the conveying drive mechanism drives the conveying belt (51) to rotate, and the discharge end of the conveying belt (51) is arranged above the automatic screening unit (4).

8. The NdFeB concentrated chamfering screening device according to claim 7, It is characterized in that The conveyor belt (51) is made of polyurethane, partitions are arranged at intervals on the conveyor belt (51), and wave-shaped baffle plates (52) are arranged on both sides of the conveyor belt (51), and the baffle plates (52) are made of polyurethane.

9. A method for screening concentrated chamfering of NdFeB magnets. It is characterized in that A NdFeB concentrated chamfering screening device as described in any one of claims 1 to 8 is used.

10. The method for concentrated chamfering screening of NdFeB magnets according to claim 9, It is characterized in that The specific steps include: ① When starting for the first time, the abrasive is placed in the abrasive box (14), and the abrasive box (14) is lifted to the same height as the traveling funnel (61) of the traveling transport unit (6) by the lifting unit (1). The baffle opening and closing power mechanism drives the discharge baffle to open, and the abrasive slides into the traveling funnel (61) of the traveling transport unit (6). The traveling funnel (61) is driven by the traveling power mechanism to transport the abrasive to each chamfering machine (31); ② The chamfering machine (31) grinds the product according to the frequency set by the control system, the grinding time is 110-120 minutes, and the grinding is carried out in four stages; ③ After the chamfering machine (31) has finished grinding, the control system controls the chamfering machine (31) to dump the abrasive and the product onto the conveyor belt (51) of the conveying unit (5). Driven by the conveying drive mechanism, the conveyor belt (51) transports the abrasive and the product to the automatic screening unit (4); ④ The automatic screening unit (4) screens the product and the abrasive in sequence, the abrasive falls from the mesh of the product screen plate, the product remains on the product screen plate and slides from the product screen plate into the product container, the unqualified abrasive is screened out from the qualified abrasive screen plate and flows into the unqualified abrasive screen plate, the qualified abrasive remains on the qualified abrasive screen plate and slides from the qualified abrasive screen plate into the abrasive box (14) of the lifting unit (1); the unqualified abrasive slides from the unqualified abrasive screen plate into the unqualified abrasive container; ⑤ The qualified abrasives after the screening are automatically weighed in the abrasive box (14), and the lifting unit (1) lifts the abrasives to the same height as the traveling funnel (61) of the traveling transport unit (6), and the above steps ① to ④ are repeated.

Images