CN112871424A

CN112871424A - Metal grinding device with screening structure and using method thereof

Info

Publication number: CN112871424A
Application number: CN202011584768.XA
Authority: CN
Inventors: 沈少华; 张伟伟; 杨小清
Original assignee: Hangzhou Kejing Electrical Equipment Development Co ltd
Current assignee: Hangzhou Kejing Electrical Equipment Development Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-06-01

Abstract

The invention provides a metal grinding device with a screening structure and a using method thereof, and relates to the technical field of metal grinding. According to the invention, firstly, a material enters the feeding pipe, then the material falls on the top of the crushing structure along the feeding pipe, then the material falls on the top of the grinding structure through the crushing structure, then the material passes through the grinding structure and falls on the top of the first sieve plate, then the output end of the second motor drives the second rotating rod to rotate, then the second rotating rod drives the first rocker to swing left and right along the second support plate through the first rotating rod, then the second rocker drives the sliding rod to reciprocate left and right along the second sleeve through the first sleeve, then the sliding rod drives the second sieve plate to reciprocate left and right through the third support, and then the second sieve plate drives the first sieve plate to reciprocate left and right through the second support.

Description

Metal grinding device with screening structure and using method thereof

Technical Field

The invention relates to the technical field of metal grinding, in particular to a metal grinding device with a screening structure and a using method thereof.

Background

Principle of grinding precision machining: grinding is a precision processing method of an abrasive material for grinding a very thin metal layer from the surface of a work piece by using a grinding tool and an abrasive material on the basis of finish processing, and grinding is divided into manual grinding and mechanical grinding, and the grinding uses abrasive particles coated or pressed on the grinding tool to finish the processing surface by the relative movement of the grinding tool and the work piece under a certain pressure. The grinding can be used for processing various metal and non-metal materials, the processed surface shape has a plane, an inner cylindrical surface, an outer cylindrical surface, a conical surface, a convex spherical surface, a concave spherical surface, a thread, a tooth surface and other molded surfaces, however, most of the existing metal grinding structures do not increase a screening structure, unqualified grinding materials can be produced due to the difference between the precision of a grinding machine and the required precision in the actual use, so that the precision of the machine is changed, the quality of products is unqualified, the unqualified products screened by a machine with the grinding structure increased in a small part can be directly accumulated on the top of a sieve plate in the actual use, the machine needs to be stopped and then cleaned, the complexity is very complex and difficult to process, the working efficiency of the device is influenced, the minimum part of the device can carry out secondary cleaning after screening, and the yield of the device can be, the yield of the device grinding is affected, which may cause resource waste and is not favorable for continuous development.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and is provided with a double-sieve plate structure capable of rapidly screening, so that the problems that the precision of a machine is changed and the quality of a product is unqualified due to the fact that unqualified grinding materials are produced are solved, an automatic discharging structure is added, the unqualified materials on the top of a sieve plate can be classified and discharged out of the box body, the problems that the machine needs to be stopped and then cleaned, the machine is very complicated and difficult to process and the working efficiency of the device is influenced are solved, a secondary grinding structure is added, the problems that the yield of the device is greatly reduced, the grinding yield of the device is influenced, resources are possibly wasted and the continuous development is not facilitated are solved.

In order to achieve the purpose, the invention adopts the following technical scheme: a metal grinding device with a screening structure comprises a base plate, wherein four first supporting columns are fixedly mounted at the top of the base plate, a first box body is fixedly mounted between the tops of the four first supporting columns, a feeding pipe is fixedly inserted into the top of the first box body, a crushing structure is fixedly mounted on the rear surface of the inner wall of the first box body, a grinding structure is fixedly connected to the rear surface of the inner wall of the first box body, a first base is fixedly mounted at the bottom of the inner wall of the first box body, a second motor is fixedly mounted at the top of the second base, a second rotating rod is fixedly sleeved on the outer surface of the output end of the second motor, two second supporting plates are fixedly mounted at the top of the second base, a first rotating rod is movably inserted between the outer surfaces of the two second supporting plates, and a first rocker is fixedly sleeved on the outer surface of the first, the novel box is characterized in that a third rotating rod is fixedly inserted into the top of the first rocker, a second rocker is movably sleeved on the outer surface of the third rotating rod, one end, far away from the third rotating rod, of the second rocker is fixedly connected with a first sleeve, two second sleeves are fixedly installed on the rear surface of the inner wall of the first box body, two sliding rods are movably inserted between the outer surfaces of the second sleeves, two third support columns are fixedly connected to the tops of the sliding rods, a second sieve plate is fixedly welded between the tops of the third support columns, four second support columns are fixedly inserted into the tops of the second sieve plate, and a first sieve plate is fixedly welded between the tops of the second support columns.

Preferably, a first support plate is fixedly welded on the rear surface of the inner wall of the first box body, a third guide plate is fixedly welded on one side of the first support plate, which is far away from the rear surface of the inner wall of the first box body, a fourth guide plate is fixedly installed on the rear surface of the inner wall of the first box body, a fixed rod is fixedly connected between two sides of the inner wall of the first box body, a conveyor belt is fixedly connected on the outer surface of the fixed rod, a second guide hole is formed in the outer surface of the first box body, a first guide plate is fixedly installed on the rear surface of the inner wall of the first box body, a first push plate is fixedly welded on the rear surface of the inner wall of the first box body, an ejector rod is fixedly installed on the inner wall of the first box body, a second push plate is fixedly welded on one end, which is far away from the first box body, of the ejector rod, a first motor is fixedly installed on the top, the packing auger is movably inserted into the inner wall of the second box body, and a second guide plate is fixedly connected to the top of the feeding pipe.

Preferably, a sliding hole is formed in the center of the first rocker, and the inner wall of the sliding hole is matched with the outer surface of the second rotating rod.

Preferably, the outer surface of the first sleeve is provided with a through hole, and the inner wall of the through hole is matched with the outer surface of the sliding rod.

Preferably, the sieve mesh has all been seted up at the top of first sieve board and second sieve board, and the sieve mesh that first sieve board top was seted up is greater than the sieve mesh that second sieve board top was seted up.

Preferably, the outer surface of the first box body is provided with a first guide hole, and the interior of the first guide hole is matched with the outer surface of the third guide plate.

Preferably, the inner wall of the second guide hole is matched with the outer surface of the first guide plate.

Preferably, the bottom of the packing auger is fixedly connected with the outer surface of the output end of the first motor.

Preferably, the outer surface of the second box body is provided with a first hinge hole, the inner wall of the first hinge hole is matched with the outer surface of the first guide plate, the outer surface of the second box body is provided with a second hinge hole, and the inner wall of the second hinge hole is matched with the outer surface of the second guide plate.

The invention also provides a using method of the metal grinding device with the screening structure, which comprises the following steps:

s1: firstly, a material enters a feeding pipe, then the material falls on the top of a crushing structure along the feeding pipe, then the material falls on the top of a grinding structure through the crushing structure, then the material passes through the grinding structure and falls on the top of a first sieve plate, then a second motor starts to work, then an output end of the second motor drives a second rotating rod to rotate, then the second rotating rod drives a first rocker to perform left-right rocking motion along a second support plate through the first rotating rod, then the first rocker drives a second rocker to perform left-right reciprocating motion through a third rotating rod, then the second rocker drives a sliding rod to perform left-right reciprocating motion along a second sleeve through a first sleeve, then the sliding rod drives a second sieve plate to perform left-right reciprocating motion through a third support, and then the second sieve plate drives the first sieve plate to perform left-right reciprocating motion through a second support;

s2: when the first sieve plate and the second sieve plate reciprocate, materials which do not pass through the sieve holes at the top of the first sieve plate are blocked by the first push plate and then pushed to the top of the first guide plate, then the materials slide into the second box body along the top of the first guide plate, materials which do not pass through the sieve holes at the top of the second sieve plate are blocked by the second push plate and then pushed to the top of the third guide plate, then the materials are discharged out of the first box body along the top of the second guide plate, the materials which pass through the sieve holes formed in the top of the second sieve plate fall on the top of the fourth guide plate, then the materials slide to the top of the conveyor belt along the top of the fourth guide plate, and at the moment, the conveyor belt starts to work to drive the materials to be conveyed to the;

s3: after the material that does not pass through first sieve gets into the second box along the top of first baffle, first motor began working this moment, and first motor drives the auger afterwards and rotates, and the material falls on the top of auger along first baffle afterwards, and the auger begins work afterwards and drives material rebound, and the material gets into the inlet pipe along the second baffle and carries out secondary treatment afterwards.

Compared with the prior art, the invention has the advantages and positive effects that,

1. when materials need to be ground, the materials enter the feeding pipe firstly, then the materials fall on the top of the crushing structure along the feeding pipe, then the materials fall on the top of the grinding structure through the crushing structure, then the materials pass through the grinding structure and fall on the top of the first sieve plate, then the second motor starts to work, then the output end of the second motor drives the second rotating rod to rotate, then the second rotating rod drives the first rocker to swing left and right along the second support plate through the first rotating rod, then the first rocker drives the second rocker to reciprocate left and right through the third rotating rod, then the second rocker drives the sliding rod to reciprocate left and right along the second sleeve through the first sleeve, then the sliding rod drives the second sieve plate to reciprocate left and right through the third support, and then the second sieve plate drives the first sieve plate to reciprocate left and right through the second support, the double-sieve plate structure capable of rapidly screening is added, and unqualified grinding materials are prevented from being produced, so that the machine precision is changed, and the problem of unqualified product quality is caused later.

2. In the invention, when the first sieve plate and the second sieve plate reciprocate, materials which do not pass through the sieve holes at the top of the first sieve plate are blocked by the first push plate and then pushed to the top of the first guide plate, then the materials slide into the second box body along the top of the first guide plate, materials which do not pass through the sieve holes at the top of the second sieve plate are blocked by the second push plate and then pushed into the top of the third guide plate, then the materials are discharged out of the first box body along the top of the second guide plate, the materials which pass through the sieve holes formed at the top of the second sieve plate fall on the top of the fourth guide plate, then the materials slide to the top of the conveyor belt along the top of the fourth guide plate, at the moment, the conveyor belt starts to work to drive the materials to be conveyed to the outer surface of the first box body, an automatic discharging structure is added, unqualified materials at the top of the sieve plate can be discharged into the, the device is quite complex and difficult to process, and the working efficiency of the device is affected.

3. According to the invention, after the material which does not pass through the first sieve plate enters the second box body along the top of the first guide plate, the first motor starts to work, then the first motor drives the packing auger to rotate, then the material falls on the top of the packing auger along the first guide plate, then the packing auger starts to work to drive the material to move upwards, then the material enters the feeding pipe along the second guide plate to be subjected to secondary treatment, and the secondary grinding structure is added, so that the problems that the yield of the device is greatly reduced, the grinding yield of the device is influenced, the resource waste is possibly caused, and the continuous development is not facilitated are solved.

Drawings

FIG. 1 is a schematic perspective view of a metal grinding apparatus with a screening structure and a method for using the same according to the present invention;

FIG. 2 is a schematic perspective view of a first box of a metal grinding apparatus with a screening structure and a method for using the same according to the present invention;

FIG. 3 is a schematic cross-sectional perspective view of a first box of a metal grinding apparatus with a screening structure and a method for using the same according to the present invention;

FIG. 4 is a schematic front sectional view of a first housing of a metal grinder with a screening structure and a method of using the same according to the present invention;

FIG. 5 is a schematic side sectional perspective view of a first housing of a metal grinder with a screening structure and a method of using the same according to the present invention;

fig. 6 is a perspective view of a second motor of a metal grinding apparatus with a screening structure and a method for using the same according to the present invention.

Illustration of the drawings:

1. a base plate; 2. a first support; 3. a first case; 4. a conveyor belt; 5. a first motor; 6. a packing auger; 7. a first guide plate; 8. a second case; 9. connecting blocks; 10. a second guide plate; 11. a feed pipe; 12. a third guide plate; 13. a crushing structure; 14. grinding the structure; 15. a first screen deck; 16. a second screen deck; 17. a first guide hole; 18. a first push plate; 19. a first support plate; 20. a second motor; 21. a first base; 22. a second base; 23. a first rocker; 24. a second support plate; 25. a first rotating lever; 26. a fourth guide plate; 27. a second rotating rod; 28. a first sleeve; 29. a second support; 30. a second push plate; 31. a top rod; 32. a third support; 33. a second sleeve; 34. a slide bar; 35. a second guide hole; 36. a third rotating rod; 37. a second rocker; 38. and (5) fixing the rod.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments of the present disclosure.

Embodiment 1, as shown in fig. 1 to 6, the present invention provides a metal grinding device with a screening structure, which includes a bottom plate 1, four first pillars 2 are fixedly installed on the top of the bottom plate 1, a first box 3 is fixedly installed between the tops of the four first pillars 2, a feeding pipe 11 is fixedly inserted into the top of the first box 3, a crushing structure 13 is fixedly installed on the rear surface of the inner wall of the first box 3, a grinding structure 14 is fixedly connected to the rear surface of the inner wall of the first box 3, a first base 21 is fixedly installed on the bottom of the inner wall of the first box 3, a second base 22 is fixedly installed on the bottom of the inner wall of the first box 3, a second motor 20 is fixedly installed on the top of the second base 22, a second rotating rod 27 is fixedly sleeved on the outer surface of the output end of the second motor 20, so that the output end of the second motor 20 can drive the second rotating rod 27 to rotate, two second supporting plates 24 are fixedly installed on the top of the, a first rotating rod 25 is movably inserted between the outer surfaces of the two second support plates 24, a first rocker 23 is fixedly sleeved on the outer surface of the first rotating rod 25, a third rotating rod 36 is fixedly inserted at the top of the first rocker 23, so that the third rotating rod 36 can rotate along the outer surface of the second support plate 24 through the first rotating rod 25, a second rocker 37 is movably sleeved on the outer surface of the third rotating rod 36, one end of the second rocker 37 far away from the third rotating rod 36 is fixedly connected with a first sleeve 28, so that the second rocker 37 can drive the sliding rod 34 to reciprocate left and right through the first sleeve 28, two second sleeves 33 are fixedly installed on the rear surface of the inner wall of the first box body 3, a sliding rod 34 is movably inserted between the outer surfaces of the two second sleeves 33, two third support columns 32 are fixedly connected at the top of the sliding rod 34, and a second sieve plate 16 is fixedly welded between the tops of the two third support columns 32, the sliding rod 34 can drive the second sieve plate 16 to reciprocate left and right through the third support column 32, four second support columns 29 are fixedly inserted at the top of the second sieve plate 16, the first sieve plate 15 is fixedly welded between the tops of the four second support columns 29, the first sieve plate 15 can be driven by the second sieve plate 16 through the second support columns 29 to reciprocate left and right, a sliding hole is arranged at the center of the first rocker 23, the inner wall of the slide hole is matched with the outer surface of the second rotating rod 27, the outer surface of the first sleeve 28 is provided with a through hole, the inner wall of the through hole is matched with the outer surface of the slide bar 34, the top parts of the first sieve plate 15 and the second sieve plate 16 are both provided with sieve holes, and the sieve pore that the top was seted up of first sieve 15 is greater than the sieve pore that the top was seted up of second sieve 16, makes first sieve 15 carry out the first coarse screening at first, carries out the second fine screening through second sieve 16 afterwards.

Embodiment 2, as shown in fig. 1 to 6, a first supporting plate 19 is fixedly welded on the rear surface of the inner wall of a first box 3, a third guide plate 12 is fixedly welded on one side of the first supporting plate 19 away from the rear surface of the inner wall of the first box 3, a fourth guide plate 26 is fixedly installed on the rear surface of the inner wall of the first box 3, so that materials can be discharged from the inside of the first box 3 along the fourth guide plate 26, a fixing rod 38 is fixedly connected between two sides of the inner wall of the first box 3, a conveyor belt 4 is fixedly connected to the outer surface of the fixing rod 38, so that the materials can be discharged from the first box 3 through the conveyor belt 4, a second guide hole 35 is opened on the outer surface of the first box 3, a first guide plate 7 is fixedly installed on the rear surface of the inner wall of the first box 3, so that the materials can be discharged from the inside of the first box 3 through the, an ejector rod 31 is fixedly installed on the inner wall of the first box body 3, a second push plate 30 is fixedly welded at one end, far away from the first box body 3, of the ejector rod 31, a first motor 5 is fixedly installed at the top of the bottom plate 1, a connecting block 9 is fixedly welded on the outer surface of the first box body 3, a second box body 8 is fixedly welded at one side, far away from the first box body 3, of the connecting block 9, an auger 6 is movably inserted into the inner wall of the second box body 8, a second guide plate 10 is fixedly connected to the top of the feeding pipe 11, so that a material can be provided with a first guide hole 17 along the outer surface of the first box body 3 of the second guide plate 10, the inner part of the first guide hole 17 is matched with the outer surface of the third guide plate 12, the inner wall of the second guide hole 35 is matched with the outer surface of the first guide plate 7, the bottom of the auger 6 is fixedly connected with the outer surface of the output end of the first, and the inner wall of the first hinge hole is matched with the outer surface of the first guide plate 7, the outer surface of the second box body 8 is provided with a second hinge hole, and the inner wall of the second hinge hole is matched with the outer surface of the second guide plate 10, so that materials can enter the feeding pipe 11 along the second guide plate 10 through the second hinge hole.

The use method of the metal grinding device with the screening structure comprises the following steps:

the method comprises the following steps: firstly, the material enters the feeding pipe 11, then the material falls on the top of the crushing structure 13 along the feeding pipe 11, then the material falls on the top of the grinding structure 14 through the crushing structure 13, then the material passes through the grinding structure 14 and falls on the top of the first sieve plate 15, then the second motor 20 starts to work, then the output end of the second motor 20 drives the second rotating rod 27 to rotate, then the second rotating rod 27 drives the first rocker 23 to rock left and right along the second support plate 24 through the first rotating rod 25, then the first rocker 23 drives the second rocker 37 to reciprocate left and right through the third rotating rod 36, then the second rocker 37 drives the sliding rod 34 to reciprocate left and right along the second sleeve 33 through the first sleeve 28, then the sliding rod 34 drives the second sieve plate 16 to reciprocate left and right through the third support column 32, then the second sieve plate 16 drives the first sieve plate 15 to reciprocate left and right through the second support column 29, the double-sieve plate structure capable of rapidly screening is added, and unqualified grinding materials are prevented from being produced, so that the machine precision is changed, and the problem of unqualified product quality is caused later.

Step two: when the first sieve plate 15 and the second sieve plate 16 reciprocate, materials which do not pass through the sieve holes on the top of the first sieve plate 15 are blocked by the first push plate 18 and then pushed to the top of the first guide plate 7, then the materials slide into the second box 8 along the top of the first guide plate 7, materials which do not pass through the sieve holes on the top of the second sieve plate 16 are blocked by the second push plate 30 and then pushed into the top of the third guide plate 12, then the materials are discharged out of the first box 3 along the top of the second guide plate 10, the materials which pass through the sieve holes formed in the top of the second sieve plate 16 fall on the top of the fourth guide plate 26, then the materials slide to the top of the conveyor belt 4 along the top of the fourth guide plate 26, at the moment, the conveyor belt 4 starts to work to drive the materials to be conveyed to the outer surface of the first box 3, an automatic discharging structure is added, unqualified materials on the top of the sieve plates can be classified and discharged out of the inside of, the device is quite complex and difficult to process, and the working efficiency of the device is affected.

Step three: after the material that does not pass first sieve 15 gets into second box 8 along the top of first baffle 7, first motor 5 begins work this moment, first motor 5 drives auger 6 and rotates afterwards, the material falls on auger 6's top along first baffle 7 afterwards, auger 6 begins work afterwards and drives material rebound, the material gets into inlet pipe 11 along second baffle 10 and carries out secondary treatment afterwards, increase secondary grinding structure 14, the yield that has avoided leading to the device reduces by a wide margin, influence the yield that the device ground, probably cause the wasting of resources, be unfavorable for the problem of sustainable development.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes by using the technical contents disclosed in the above description to other fields, but any simple modification, equivalent change and change made to the above embodiments according to the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a metal grinder with screening structure, includes bottom plate (1) etc. its characterized in that: the top of the bottom plate (1) is fixedly provided with four first supporting columns (2), a first box body (3) is fixedly arranged between the tops of the four first supporting columns (2), the top of the first box body (3) is fixedly inserted with an inlet pipe (11), a crushing structure (13) is fixedly arranged on the rear surface of the inner wall of the first box body (3), a grinding structure (14) is fixedly connected on the rear surface of the inner wall of the first box body (3), a first base (21) is fixedly arranged on the bottom of the inner wall of the first box body (3), a second base (22) is fixedly arranged on the bottom of the inner wall of the first box body (3), a second motor (20) is fixedly arranged on the top of the second base (22), a second rotating rod (27) is sleeved on the outer surface of the output end of the second motor (20), and two second supporting plates (24) are fixedly arranged on the top of the second base (22), a first rotating rod (25) is movably inserted between the outer surfaces of the two second support plates (24), a first rocker (23) is fixedly sleeved on the outer surface of the first rotating rod (25), a third rotating rod (36) is fixedly inserted at the top of the first rocker (23), a second rocker (37) is movably sleeved on the outer surface of the third rotating rod (36), one end, far away from the third rotating rod (36), of the second rocker (37) is fixedly connected with a first sleeve (28), two second sleeves (33) are fixedly installed on the rear surface of the inner wall of the first box body (3), a sliding rod (34) is movably inserted between the outer surfaces of the two second sleeves (33), two third support columns (32) are fixedly connected to the top of the sliding rod (34), a second sieve plate (16) is fixedly welded between the tops of the two third support columns (32), and four second support columns (29) are fixedly inserted at the top of the second sieve plate (16), and a first sieve plate (15) is fixedly welded between the tops of the four second pillars (29).

2. The metal grinding device with the screening structure as claimed in claim 1, wherein: a first support plate (19) is fixedly welded on the rear surface of the inner wall of the first box body (3), a third guide plate (12) is fixedly welded on one side, away from the rear surface of the inner wall of the first box body (3), of the first support plate (19), a fourth guide plate (26) is fixedly installed on the rear surface of the inner wall of the first box body (3), a fixed rod (38) is fixedly connected between two sides of the inner wall of the first box body (3), a conveyor belt (4) is fixedly connected to the outer surface of the fixed rod (38), a second guide hole (35) is formed in the outer surface of the first box body (3), a first guide plate (7) is fixedly installed on the rear surface of the inner wall of the first box body (3), a first push plate (18) is fixedly welded on the rear surface of the inner wall of the first box body (3), a push rod (31) is fixedly installed on the inner wall of the first box body (3), and a second push plate (30) is, the top fixed mounting of bottom plate (1) has first motor (5), the outer fixed welding of first box (3) has even piece (9), one side fixed welding that keeps away from first box (3) even piece (9) has second box (8), the inner wall activity of second box (8) is inserted and is equipped with auger (6), the top fixedly connected with second baffle (10) of inlet pipe (11).

3. The metal grinding device with the screening structure as claimed in claim 2, wherein: the outer surface of the first sleeve (28) is provided with a through hole, and the inner wall of the through hole is matched with the outer surface of the sliding rod (34).

4. The metal grinding device with the screening structure as claimed in claim 3, wherein: the sieve mesh has all been seted up at the top of first sieve board (15) and second sieve board (16), and the sieve mesh that first sieve board (15) top was seted up is greater than the sieve mesh that second sieve board (16) top was seted up.

5. The metal grinding device with the screening structure as claimed in claim 4, wherein: a first guide hole (17) is formed in the outer surface of the first box body (3), and the interior of the first guide hole (17) is matched with the outer surface of the third guide plate (12).

6. The metal grinding device with the screening structure as claimed in claim 5, wherein: the inner wall of the second guide hole (35) is matched with the outer surface of the first guide plate (7).

7. The metal grinding device with the screening structure as claimed in claim 6, wherein: the bottom of the packing auger (6) is fixedly connected with the outer surface of the output end of the first motor (5).

8. The metal grinding device with the screening structure as claimed in claim 7, wherein: the outer surface of the second box body (8) is provided with a first hinge hole, the inner wall of the first hinge hole is matched with the outer surface of the first guide plate (7), the outer surface of the second box body (8) is provided with a second hinge hole, and the inner wall of the second hinge hole is matched with the outer surface of the second guide plate (10).

9. A method for using a metal grinding device with a screening structure, which is characterized in that the metal grinding device with the screening structure according to claim 8 is used, and comprises the following steps:

s1: firstly, materials enter a feeding pipe (11), then fall on the top of a crushing structure (13) along the feeding pipe (11), then fall on the top of a grinding structure (14) through the crushing structure (13), then pass through the grinding structure (14) and fall on the top of a first sieve plate (15), then a second motor (20) starts to work, then an output end of the second motor (20) drives a second rotating rod (27) to rotate, then the second rotating rod (27) drives a first rocker (23) to swing left and right along a second support plate (24) through a first rotating rod (25), then the first rocker (23) drives a second rocker (37) to reciprocate left and right through a third rotating rod (36), then the second rocker (37) drives a sliding rod (34) to reciprocate left and right along a second sleeve (33) through a first sleeve (28), and then the sliding rod (34) drives a second sieve plate (16) to reciprocate left and right through a third support column (32), then the second sieve plate (16) drives the first sieve plate (15) to reciprocate left and right through a second pillar (29);

s2: when the first sieve plate (15) and the second sieve plate (16) reciprocate, materials which do not pass through sieve holes on the top of the first sieve plate (15) are blocked by the first push plate (18), then are pushed to the top of the first guide plate (7), then slide into the second box body (8) along the top of the first guide plate (7), materials which do not pass through sieve holes on the top of the second sieve plate (16) are blocked by the second push plate (30), then are pushed into the top of the third guide plate (12), then are discharged out of the first box body (3) along the top of the second guide plate (10), materials which pass through sieve holes formed on the top of the second sieve plate (16) fall on the top of the fourth guide plate (26), then slide to the top of the conveyor belt (4) along the top of the fourth guide plate (26), and at the moment, the conveyor belt (4) starts to work to drive the materials to be conveyed to the outer surface of the first box body (3);

s3: after the materials which do not pass through the first sieve plate (15) enter the second box body (8) along the top of the first guide plate (7), the first motor (5) starts to work, then the first motor (5) drives the packing auger (6) to rotate, then the materials fall on the top of the packing auger (6) along the first guide plate (7), then the packing auger (6) starts to work to drive the materials to move upwards, and then the materials enter the feeding pipe (11) along the second guide plate (10) to be subjected to secondary treatment.