Efficient flow line production structure of neodymium iron boron permanent magnet material grain boundary diffusion process

Abstract

The utility model discloses an efficient flow line production structure of a neodymium iron boron permanent magnet material grain boundary diffusion process. The efficient flow line production structure comprises a first screen printing machine, a first conveying tunnel furnace, a plate turnover machine, a second screen printing machine and a second conveying tunnel furnace. The first screen printing machine is used for printing slurry on the jig plate and conveying the jig plate printed with the slurry to the first conveying tunnel furnace; the jig plate flowing out of the first conveying tunnel furnace enters a plate turnover machine to be turned over; the plate turnover machine conveys the turned jig plate to the second screen printing machine to be used for printing slurry on the jig plate, and the jig plate printed with the slurry is conveyed to the second conveying tunnel furnace. According to the utility model, the sagging problem of the permanent magnet coating in the traditional spraying, electroplating and chemical plating assembly line is solved, and the quality of the coating and the stable performance of the permanent magnet are ensured. An efficient, environment-friendly and automatic permanent magnet coating arrangement mode is provided, and substantive technical progress is brought to the motor manufacturing industry.

Description

Technical Field

[0001] The utility model relates to the technical field of production of NdFeB permanent magnet materials, in particular to a high-efficiency assembly line production structure of a grain boundary diffusion process of NdFeB permanent magnet materials. Background Art

[0002] The permanent magnet in the motor is one of its core components. Its functional stability and durability are directly related to the efficiency and life of the motor. In order to produce magnets with higher comprehensive performance, coating technology is widely used. Through coating, we can enhance the comprehensive performance of the permanent magnet, thereby extending its service life and improving the overall performance of the motor.

[0003] However, the current coating setting methods in the industry, such as spraying lines, electroplating lines or chemical plating lines, all have some problems that are difficult to ignore. Specifically, when the spraying line is operating, the coating is prone to sagging, which not only affects the aesthetics of the coating, but is also likely to damage the performance of the permanent magnet. The electroplating line involves the discharge of electroplating wastewater, which not only increases production costs, but also has adverse effects on the environment. Furthermore, although chemical plating can solve the problems of the first two to a certain extent, its process is complicated, the cost is high, and it is not easy to apply on a large scale.

[0004] Therefore, in view of the above problems in the prior art, we urgently need to develop a new permanent magnet coating setting method. This method needs to be able to effectively avoid the problem of coating sagging, and at the same time meet environmental protection requirements and not generate wastewater discharge. Utility Model Content

[0005] The technical problem solved by the utility model is to provide a high-efficiency assembly line production structure for the grain boundary diffusion process of NdFeB permanent magnet materials in view of the defects existing in the above-mentioned prior art, so as to solve the problem that the previous permanent magnet coating process mainly relies on spraying lines, electroplating lines or chemical plating lines to achieve it, but spraying is prone to sagging, and electroplating involves the problem of discharge of electroplating wastewater.

[0006] In order to solve the above technical problems, the technical solutions adopted by the utility model are as follows:

[0007] An efficient assembly line production structure for a grain boundary diffusion process of a NdFeB permanent magnet material, comprising a first screen printer, a first conveying tunnel furnace, a plate turning machine, a second screen printer, and a second conveying tunnel furnace;

[0008] The first screen printer is used to print slurry on the jig plate, and transport the jig plate after printing slurry to the first transport tunnel furnace;

[0009] The jig plate flowing out of the first conveying tunnel furnace enters the plate turning machine for turning over;

[0010] The plate turning machine transports the turned-over jig plate to the second screen printing machine for printing slurry on the jig plate, and transports the jig plate after printing slurry to the second conveying tunnel furnace.

[0011] As a further solution of the present invention, the transportation is carried out by a conveyor.

[0012] As a further solution of the utility model, the first screen printing machine and the second screen printing machine respectively include a bracket seat, a jig, a conveyor belt, a positioning mechanism and a printing mechanism. The bracket seat is provided with a conveyor belt for conveying the jig, and a positioning mechanism for positioning the jig on the conveyor belt. On the bracket seat, a printing mechanism is arranged above the positioning mechanism. The printing mechanism includes a liftable material seat, a scraper hole, a scraper plate and a return plate. A groove material cavity is arranged on the upper surface of the material seat, and the groove material cavity includes a groove bottom, and a scraper hole is arranged at the groove bottom; a scraper plate and a return plate that can be lifted and lowered and can move in parallel are arranged above the scraper hole.

[0013] As a further scheme of the utility model, the flipping machine includes a bracket, and a conveying and flipping mechanism and a jig mechanism arranged on the bracket; the conveying and flipping mechanism includes a rotating bracket seat, a second conveyor belt, a first lifting and adsorption mechanism, a second lifting and adsorption mechanism, a first conveyor belt and a third conveyor belt; the rotating bracket seat is rotatably arranged on the bracket, and the second conveyor belt is arranged in the middle of the rotating bracket seat; on the rotating bracket seat, the first lifting and adsorption mechanism and the second lifting and adsorption mechanism are fixedly arranged above and below the second conveyor belt respectively; on the bracket, the first conveyor belt is arranged in front of the second conveyor belt, and the third conveyor belt is arranged behind the second conveyor belt; the conveying planes of the first conveyor belt, the second conveyor belt and the third conveyor belt are on the same plane; the jig mechanism includes two jig plates, and the inner side of the jig plate is provided with a limiting cavity. When the two jig plates are covered together facing each other, the limiting cavity of the two jig plates is combined to form a permanent magnet sheet positioning cavity.

[0014] As a further solution of the utility model, a one-to-two conveyor is provided between the first screen printing machine and the first conveying tunnel furnace, and a two-to-one conveyor is provided between the first screen printing machine and the plate turning machine.

[0015] As a further solution of the utility model, a one-to-two conveyor is provided between the second screen printing machine and the second conveying tunnel furnace, and a two-to-one conveyor is provided at the discharge port of the second conveying tunnel furnace.

[0016] As a further solution of the utility model, the first screen printing machine is fed by a first double-layer conveyor, and a second double-layer conveyor is arranged at the discharge port of the second conveying tunnel furnace to receive the material flowing out of the discharge port of the second conveying tunnel furnace.

[0017] As a further solution of the utility model, the incoming end of the first double-layer conveyor and the outgoing end of the second double-layer conveyor are respectively provided with a first elevator and a second elevator.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. It solves the problem of sagging of permanent magnet coating in traditional spraying, electroplating and chemical plating lines, ensuring the quality of coating and stable performance of permanent magnet.

[0020] 2. Through the introduction of the plate turning machine, the automatic turning of the jig plate is realized, which is conducive to setting the coating on the front side of the permanent magnet sheet and then turning it over to set the coating on the back side, thereby improving production efficiency and reducing labor costs.

[0021] 3. The production of electroplating wastewater is avoided in the assembly line design, thus meeting environmental protection requirements and reducing production costs and impact on the environment.

[0022] 4. An innovative printing structure is used to set the coating, making the coating more uniform and further enhancing the corrosion resistance and wear resistance of the permanent magnet.

[0023] 5. Through the combined use of conveyors, double-layer conveyors, elevators and other equipment, the automation and efficiency of the entire assembly line are achieved.

[0024] In general, the utility model provides an efficient, environmentally friendly and automated method for setting permanent magnet coatings, which brings substantial technological progress to the motor manufacturing industry.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 It is a structural schematic diagram of the utility model.

[0028] Figure 2 For the general Figure 1 A schematic diagram of the structure when part of the structure of the first conveying tunnel furnace and the second conveying tunnel furnace is hidden and the length of the figure is shortened.

[0029] Figure 3 for Figure 2 A magnified schematic diagram of part A.

[0030] Figure 4 for Figure 2 An enlarged schematic diagram of part B.

[0031] Figure 5 for Figure 2 Enlarged schematic diagram of part C of FIG.

[0032] Figure 6 for Figure 2 An enlarged schematic diagram of part D of FIG.

[0033] Figure 7 for Figure 2 Enlarged schematic diagram of part E of .

[0034] Figure 8 It is a structural schematic diagram of the first screen printing machine or the second screen printing machine.

[0035] Fig. 9 for Figure 8 Enlarged schematic diagram of part F.

[0036] Fig.10 It is a structural schematic diagram of the material holder.

[0037] Fig.11 It is a structural schematic diagram of the flip machine.

[0038] Fig.12 for Fig.11 Schematic diagram of the structure from another perspective.

[0039] Fig.13 It is a structural schematic diagram of the fixture plate.

[0040] The reference numerals and names in the figures are as follows:

[0041] The first screen printing machine 1, the first conveying tunnel furnace 2, the turnover machine 3, the second screen printing machine 4, the second conveying tunnel furnace 5, the bracket seat 6, the fixture plate 7, the conveyor belt body 8, the material seat 9, the groove material cavity 91, the groove bottom 911, the scraper hole 10, the scraper plate 11, the return plate 12, the front lifting and translation clamping column 13, the rear lifting and translation clamping column 14, the left lifting and translation clamping column 15, the right lifting and translation clamping column 16, the permanent magnet sheet 17, the frame 18, the rotating support 19, the second conveyor belt 20, the first lifting and adsorption mechanism 21, the second lifting and adsorption mechanism 22, the first conveyor belt 23, the third conveyor belt 24, the limiting cavity 25, the one-to-two conveyor 26, the two-to-one conveyor 27, the first double-layer conveyor 28, the second double-layer conveyor 29, the first elevator 30 and the second elevator 31. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. 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.

[0043] See also Figure 1 —13. In the embodiment of the utility model, a high-efficiency assembly line production structure for the grain boundary diffusion process of NdFeB permanent magnet material is provided, including a first screen printer 1, a first conveying tunnel furnace 2, a flipping machine 3, a second screen printer 4 and a second conveying tunnel furnace 5; the first conveying tunnel furnace 2 and the second conveying tunnel furnace 5 can be respectively understood as tunnel furnaces known to ordinary technicians in the field in the prior art for drying permanent magnets after printing slurry, which are all implemented based on the prior art and can therefore be understood and applied as part of the prior art.

[0044] The first screen printer 1 is used to print slurry on the jig plate 7 and transport the jig plate after printing slurry to the first transport tunnel furnace 2;

[0045] The jig plate 7 flowing out of the first conveying tunnel furnace 2 enters the plate turning machine 3 for turning over;

[0046] The plate turning machine 3 transports the turned-over jig plate 7 to the second screen printing machine 4 for printing slurry on the jig plate 7 , and transports the jig plate after printing slurry to the second conveying tunnel furnace 5 .

[0047] The transporting is carried out by a conveyor.

[0048] The first screen printer 1 and the second screen printer 4 respectively include a support seat 6, a fixture plate 7, a conveyor belt body 8, a positioning mechanism and a printing mechanism. The support seat 6 is provided with a conveyor belt body 8 for conveying the fixture plate 7, and a positioning mechanism for positioning the fixture plate 7 on the conveyor belt body 8. On the support seat 6, a printing mechanism is arranged above the positioning mechanism. The printing mechanism includes a liftable material seat 9, a scraper hole 10, a scraper plate 11 and a return plate 12. The upper surface of the material seat 9 is provided with a groove material cavity 91, and the groove material cavity 91 includes a groove bottom 911, and a scraper hole 10 is arranged on the groove bottom 911; a scraper plate 11 and a return plate 12 that can be lifted and moved in parallel are arranged above the scraper hole 10; at the same time, the specific structures in the concepts of flipping, conveying, rotating, lifting, and translation involved in the utility model can be understood and known by ordinary technicians in the field. These structures are implemented based on the existing technology, so they can be understood and applied as part of the existing technology.

[0049] At the same time, the permanent magnet sheets processed in this production line should be permanent magnet sheets 7 that are not magnetized, so as to facilitate processing and avoid the inconvenience of displacement caused by magnetism.

[0050] The positioning mechanism includes a front lifting and translating clamping column 13, a rear lifting and translating clamping column 14, a left lifting and translating clamping column 15 and a right lifting and translating clamping column 16. The front lifting and translating clamping column 13 and the rear lifting and translating clamping column 14 are respectively located between the first conveyor belt 23 body 8 and the second conveyor belt 20 to form an avoidance positioning space. The front lifting and translating clamping column 13 and the rear lifting and translating clamping column 14 are combined to form a front and rear positioning space. The left lifting and translating clamping column 15 and the right lifting and translating clamping column 16 are respectively located on one side of the first conveyor belt 23 body 8 and one side of the second conveyor belt 20. The left lifting and translating clamping column 15 and the right lifting and translating clamping column 16 are combined to form a left and right positioning space.

[0051] When the jig plate 7 with permanent magnet pieces 17 in the concave cavity is transported to the position of the positioning mechanism, that is, the position between the front lifting and translational clamping column 13, the rear lifting and translational clamping column 14, the left lifting and translational clamping column 15 and the right lifting and translational clamping column 16, the front lifting and translational clamping column 13, the rear lifting and translational clamping column 14, the left lifting and translational clamping column 15 and the right lifting and translational clamping column 16 rise respectively and clamp inward at the same time to position the jig plate 7 on the conveyor belt body 8, and then the liftable material seat 9 descends to align the scraper hole 10 with the jig plate 7, and the combination of the permanent magnet pieces 17 on the concave cavity of the jig plate 7 blocks the scraper hole 10, and then the scraper plate 11 that can be lifted and moved in parallel contacts the bottom of the groove of the groove material cavity after it descends, and after parallel movement, the liquid in the groove material cavity is removed. The scraping is applied to the permanent magnet sheet 17 blocked at the scraping hole 10, and the scraped material body is returned to its original position through the return plate 12 which can be lifted and moved in parallel, so as to achieve the use effect of setting the coating of the permanent magnet sheet 17 in a printing manner; and after the coating is set by scraping, the front lifting and translation clamping column 13, the rear lifting and translation clamping column 14, the left lifting and translation clamping column 15 and the right lifting and translation clamping column 16 release the inward clamping of the jig plate 7 by reverse translation, and descend so that the jig plate 7 with permanent magnet sheets 17 in the concave cavity can be transported away by the conveyor belt 8, and a new jig plate 7 with permanent magnet sheets 17 in the concave cavity is transported to the position between the lifting and translation clamping column, the rear lifting and translation clamping column 14, the left lifting and translation clamping column 15 and the right lifting and translation clamping column 16 by the conveyor belt 8, and the cycle is repeated.

[0052] The plate turning machine 3 comprises a frame 18, and a conveying and turning mechanism and a jig plate 7 mechanism arranged on the frame 18; the conveying and turning mechanism comprises a rotating support 19, a second conveyor belt 20, a first lifting and adsorption mechanism 21, a second lifting and adsorption mechanism 22, a first conveyor belt 23 and a third conveyor belt 24; the rotating support 19 is rotatably arranged on the frame 18, and the second conveyor belt 20 is arranged in the middle of the rotating support 19; on the rotating support 19, the first lifting and adsorption mechanism 21 and the third conveyor belt 24 are fixedly arranged above and below the second conveyor belt 20, respectively. Two lifting adsorption mechanisms 22; on the bracket, a first conveyor belt 23 is arranged in front of the second conveyor belt 20, and a third conveyor belt 24 is arranged behind the second conveyor belt 20; the conveying planes of the first conveyor belt 23, the second conveyor belt 20 and the third conveyor belt 24 are on the same plane; the jig plate 7 mechanism includes two jig plates 7, and a limiting cavity 25 is arranged on the inner side surface of the jig plate 7. When the two jig plates 7 are covered together facing each other, the limiting cavity 25 of the two jig plates 7 is combined to form a positioning cavity for the permanent magnet sheet 17.

[0053] At the same time, the rare earth slurry printed by the screen printer of the utility model onto the RuFeB magnet is an application of grain boundary diffusion technology. The grain boundary diffusion technology can not only reduce the use of rare earth materials and effectively save precious heavy rare earth resources, but also significantly reduce the production cost of the magnet, thereby improving the comprehensive cost performance of the product.

[0054] When the start-up equipment is ready for use, a jig plate 7 (hereinafter referred to as the first plate body) can be placed on the first conveyor belt 23 first. The jig plate 7 has a limiting cavity 25. When the limiting cavity 25 is placed on it, it can be placed facing downward; then, the first conveyor belt 23 works to transport the first plate body to the second conveyor belt 20 on the bracket 1, and the first lifting and adsorption mechanism 21 above the second conveyor belt 20 adsorbs the first plate body and lifts the first plate body to the top of the second conveyor belt 20. At this time, the start-up preparation work is completed.

[0055] Then, another jig plate 7 (hereinafter referred to as the second plate body) with another limiting concave cavity 25 filled with permanent magnet pieces 17 is placed on the first conveyor belt 23, and the first conveyor belt 23 conveys it to the second conveyor belt 20, and the first lifting and adsorption mechanism 21 drives the previous first plate body to descend and cover the second plate body filled with permanent magnet pieces 17, so that the permanent magnet pieces 17 are in the permanent magnet piece 17 positioning cavity formed by the two jig plates 7, and then rotated 180 degrees by the rotating support 19, so that the second plate body is above the first plate body, and the second plate body originally on the second plate body is The permanent magnet piece 17 falls on the first plate due to its own gravity. At this time, the second lifting and adsorption mechanism 22 is also flipped 180 degrees together with the rotating support 19. The second lifting and adsorption mechanism 22 is located above the first lifting and adsorption mechanism 21, and the second lifting and adsorption mechanism 22 adsorbs the second plate, driving the second plate to rise and separate from the first plate. Then the second conveyor belt 20 works to convey the second plate filled with permanent magnet pieces 17 to the third conveyor belt 24, so that the second plate can be directly transported and used after being turned over.

[0056] A one-to-two conveyor 26 is provided between the first screen printing machine 1 and the first conveying tunnel furnace 2, and two-to-one conveyors 27 are provided between the first screen printing machine 1 and the plate turning machine 3; a one-to-two conveyor 26 is provided between the second screen printing machine 4 and the second conveying tunnel furnace 5, and a two-to-one conveyor 27 is provided at the discharge port of the second conveying tunnel furnace 5; the first screen printing machine 1 is fed by a first double-layer conveyor 28, and a second double-layer conveyor 29 is provided at the discharge port of the second conveying tunnel furnace 5 to receive the material flowing out of the discharge port of the second conveying tunnel furnace 5 body; the inlet end of the first double-layer conveyor 28 and the outlet end of the second double-layer conveyor 29 are respectively provided with a first elevator 30 and a second elevator 31; wherein, the one-to-two conveyors 26 and the two-to-one conveyors 27, the first double-layer conveyor 28, the second double-layer conveyor 29, the first elevator 30 and the second elevator 31 can be understood literally, that is, they are only used for conveying the jig plate 7 in different ways, and these structures are implemented based on the existing technology, and therefore, can be understood and applied as a part of the existing technology.

[0057] Embodiment 1:

[0058] The jig plate 7 containing a plurality of permanent magnetic materials is transported to the first screen printer 1 by the first double-layer conveyor 28. The first screen printer 1 prints and coats the front side of the permanent magnetic material on the jig plate 7. After printing, the jig plate 7 is transported to the one-to-two conveyor 26 between the first screen printer 1 and the first conveying tunnel furnace 2. The one-to-two conveyor 26 transports the jig plate 7 into the first conveying tunnel furnace 2. After the jig plate 7 passes through the first conveying tunnel furnace 2, it enters the two-to-one conveyor 27 between the first screen printer 1 and the plate turning machine 3, and is transported to the plate turning machine 3 through the two-to-one conveyor 27. The plate turning machine 3 performs a coating on the jig plate 7. The permanent magnetic material is turned over so that the back side of the permanent magnetic material faces upward, and then transported to the second screen printer 4. The second screen printer 4 prints a coating on the back side of the permanent magnetic material on the jig plate 7. After printing, it is transported to the one-to-two conveyor 26 between the second screen printer 4 and the second conveying tunnel furnace 5. The one-to-two conveyor 26 transports the jig plate 7 into the second conveying tunnel furnace 5. After the jig plate 7 passes through the second conveying tunnel furnace 5, it enters the two-to-one conveyor 27 between the second screen printer 4 and the second double-layer conveyor 29, and enters the second double-layer conveyor 29 through the two-to-one conveyor 27.

[0059] And in the extended embodiment, a first elevator 30 is provided at a position between the first double-layer conveyor 28 and the second double-layer conveyor 29, and a second elevator 31 is provided at a position between the second double-layer conveyor 29 and the first double-layer conveyor 28. Through the arrangement of the first elevator and the second elevator, the positions of the conveyed objects on the upper layer and the lower layer of the first double-layer conveyor 28 and the second double-layer conveyor 29 can be switched, so that when the lower conveyor belt of the first double-layer conveyor 28 and the lower conveyor belt of the second double-layer conveyor 29 are connected by another conveyor belt, the jig plate 7 to be recycled can be placed on the lower layer of the second double-layer conveyor 29 at the position of the second double-layer conveyor 29, and return to the position of the first double-layer conveyor 28 through this connection, thereby achieving the effect of facilitating recycling.

[0060] Further beneficial effects of the utility model can be reflected in the following application scenarios:

[0061] 1. It solves the problem of sagging of permanent magnet coating in traditional spraying, electroplating and chemical plating lines, ensuring the quality of coating and stable performance of permanent magnet.

[0062] 2. By introducing the plate turning machine, the automatic turning of the jig plate is realized, which is conducive to turning over the permanent magnet sheet 17 after the front coating is set and then setting the back coating, thereby improving production efficiency and reducing labor costs.

[0063] 3. The production of electroplating wastewater is avoided in the assembly line design, thus meeting environmental protection requirements and reducing production costs and impact on the environment.

[0064] 4. An innovative printing structure is used to set the coating, making the coating more uniform and further enhancing the corrosion resistance and wear resistance of the permanent magnet.

[0065] 5. Through the combined use of conveyors, double-layer conveyors, elevators and other equipment, the automation and efficiency of the entire assembly line are achieved.

[0066] In general, the utility model provides an efficient, environmentally friendly and automated method for setting permanent magnet coatings, which brings substantial technological progress to the motor manufacturing industry.

[0067] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0068] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. An efficient production line structure for the grain boundary diffusion process of NdFeB permanent magnet material, characterized in that: It includes a first screen printing machine, a first conveying tunnel furnace, a plate turning machine, a second screen printing machine, and a second conveying tunnel furnace; The first screen printer is used to print slurry on the jig plate, and transport the jig plate after printing slurry to the first transport tunnel furnace; The jig plate flowing out of the first conveying tunnel furnace enters the plate turning machine for turning over; The plate turning machine transports the turned-over jig plate to the second screen printing machine for printing slurry on the jig plate, and transports the jig plate after printing slurry to the second conveying tunnel furnace.

2. The high-efficiency assembly line production structure of the grain boundary diffusion process of NdFeB permanent magnet material according to claim 1, characterized in that: The transporting is carried out by a conveyor.

3. The high-efficiency assembly line production structure of the grain boundary diffusion process of NdFeB permanent magnet material according to claim 1, characterized in that: The first screen printing machine and the second screen printing machine respectively include a bracket seat, a jig, a conveyor belt, a positioning mechanism and a printing mechanism. The bracket seat is provided with a conveyor belt for conveying the jig, and a positioning mechanism for positioning the jig on the conveyor belt. On the bracket seat, a printing mechanism is arranged above the positioning mechanism. The printing mechanism includes a liftable material seat, a scraper hole, a scraper plate and a return plate. A groove material cavity is arranged on the upper surface of the material seat. The groove material cavity includes a groove bottom, and a scraper hole is arranged at the groove bottom; a scraper plate and a return plate that can be lifted and lowered and can move in parallel are arranged above the scraper hole.

4. The high-efficiency assembly line production structure of the grain boundary diffusion process of NdFeB permanent magnet material according to claim 1, characterized in that: The plate turning machine includes a bracket, and a conveying and flipping mechanism and a jig mechanism arranged on the bracket; the conveying and flipping mechanism includes a rotating bracket seat, a second conveyor belt, a first lifting and adsorption mechanism, a second lifting and adsorption mechanism, a first conveyor belt and a third conveyor belt; the rotating bracket seat is rotatably arranged on the bracket, and the second conveyor belt is arranged in the middle of the rotating bracket seat; on the rotating bracket seat, the first lifting and adsorption mechanism and the second lifting and adsorption mechanism are fixedly arranged above and below the second conveyor belt respectively; on the bracket, the first conveyor belt is arranged in front of the second conveyor belt, and the third conveyor belt is arranged behind the second conveyor belt; the conveying planes of the first conveyor belt, the second conveyor belt and the third conveyor belt are on the same plane; the jig mechanism includes two jig plates, and the inner side of the jig plate is provided with a limiting cavity. When the two jig plates are covered together facing each other, the limiting cavities of the two jig plates are combined to form a permanent magnet sheet positioning cavity.

5. The high-efficiency assembly line production structure of the grain boundary diffusion process of NdFeB permanent magnet material according to claim 1, characterized in that: A one-to-two conveyor is arranged between the first screen printing machine and the first conveying tunnel furnace, and a two-to-one conveyor is arranged between the first screen printing machine and the plate turning machine.

6. The high-efficiency assembly line production structure of the grain boundary diffusion process of NdFeB permanent magnet material according to claim 1, characterized in that: A one-to-two conveyor is arranged between the second screen printing machine and the second conveying tunnel furnace, and a two-to-one conveyor is arranged at the discharge port of the second conveying tunnel furnace.

7. The high-efficiency assembly line production structure of the grain boundary diffusion process of NdFeB permanent magnet material according to claim 6, characterized in that: The first screen printing machine is fed by a first double-layer conveyor, and a second double-layer conveyor is arranged at the discharge port of the second conveying tunnel furnace to receive the material body flowing out of the discharge port of the second conveying tunnel furnace.

8. The high-efficiency assembly line production structure of the grain boundary diffusion process of NdFeB permanent magnet material according to claim 7, characterized in that: The incoming end of the first double-layer conveyor and the outgoing end of the second double-layer conveyor are respectively provided with a first elevator and a second elevator.

Images