A cutting apparatus for metal round bars

Abstract

The application relates to the field of metal round bar processing and discloses a metal round bar cutting device which comprises a bottom disc, a rotating structure arranged at the middle of the bottom disc, a supporting structure arranged above the bottom disc, a collecting cylinder arranged on the bottom disc and a screening structure arranged in the collecting cylinder. When the metal round bar is processed, the storing material structure is continuously fed on the supporting structure by the rotating structure, and the cutting structure is continuously used to cut the fed metal round bar on the supporting structure by the rotating structure. Therefore, the working time is greatly saved, and the cutting and processing efficiency of the metal round bar is higher.

Description

Technical Field

[0001] This invention relates to the technical field of metal round bar processing, and in particular to a cutting device for metal round bars. Background Technology

[0002] Metal round bars are long strip metal materials with a circular cross-section. They are usually made by processes such as rolling, forging or powder metallurgy and are widely used in industries such as machining, construction and tool manufacturing. Cutting equipment is used when processing metal round bars.

[0003] In existing cutting equipment, a rotating rod drives multiple disc cutters with adjustable cutting spacing to rotate. The multiple disc cutters cut the metal rod in segments, improving the cutting effect. Multiple secondary support frames support and fix the metal rod, and the primary sliding plate drives the secondary sliding plates to adjust their positions synchronously through the primary telescopic rod, which can adapt to the different lengths of the metal rod for fixing and cutting.

[0004] However, during the cutting process, the metal rods need to be manually fed and manually removed after cutting. This results in a long time loss during the cutting process, which reduces work efficiency. Therefore, there is room for improvement. Summary of the Invention

[0005] To address the problems mentioned in the background art, the present invention provides a cutting device for metal round bars.

[0006] The present invention provides a metal round bar cutting device with the following technical solution:

[0007] A cutting device for metal round bars includes a chassis, a rotating structure disposed at the center of the chassis, a supporting structure disposed above the chassis, a collecting cylinder disposed on the chassis, and a screening structure disposed inside the collecting cylinder;

[0008] The rotating structure includes a mounting cylinder located in the middle of the chassis, a first motor installed inside the mounting cylinder, a rotating column connected to the top of the output shaft of the first motor, a rotating plate fixedly sleeved on the top of the rotating column, a material storage structure at one end of the rotating plate, and a cutting structure at the other end of the rotating plate.

[0009] The support structure includes support rods connected to the side of the chassis. The top ends of the two support rods are connected to a first annular plate. A second annular plate is provided inside the first annular plate. A cutting gap is left between the first annular plate and the second annular plate. The first annular plate and the second annular plate are connected by multiple connecting plates. The multiple connecting plates are distributed at equal angles around their circumferences. Multiple sets of material discharge grooves are opened on the first annular plate and the second annular plate. A material support structure is provided below the first annular plate and the second annular plate.

[0010] Preferably, the material storage structure includes a mounting frame disposed at one end of the rotating plate, through which a feeding frame is fixedly passed, and a discharge frame is installed above the rear side of the feeding frame, the discharge frame being inclined downward toward the feeding frame.

[0011] Preferably, the cutting structure includes a cylinder installed at the other end of the rotating plate, the top of the cylinder output shaft is connected to a lifting plate, and vertical rods are connected to the four corners of the lifting plate. The vertical rods move through the rotating plate, and a square cover is connected to the bottom of the vertical rods. A second motor is installed in the middle of the rear side of the square cover, and a cutting blade is installed at one end of the output shaft of the second motor inserted into the square cover. A clamping structure is provided on the square cover.

[0012] Preferably, the material support structure includes a support plate that is attached to the bottom of the first annular plate and the second annular plate. The included angle between the two sides of the support plate is 220 degrees. Multiple first cylindrical rods are connected to the inner wall side of the support plate, and one end of each first cylindrical rod is connected to a rotating column.

[0013] Preferably, the clamping structure includes two fixed rods disposed on a square cover. A first limiting structure is disposed on the fixed rod near its bottom end. The fixed rod is disposed on the square cover by an adjusting structure. A sleeve is movably sleeved on the bottom end of each fixed rod. A square sleeve is fixedly sleeved on the fixed rod above the sleeve. A first spring is connected between the sleeve and the square sleeve. A clamping cover is disposed at the bottom end of the sleeve. A second limiting structure is disposed inside the clamping cover.

[0014] Preferably, the adjustment structure includes two fixed plates fastened to the square cover by bolts. A first bidirectional screw passes through the fixed plates. A first rotating block is fixedly sleeved at both ends of the first bidirectional screw. The front and rear threads of the first bidirectional screw have opposite directions. A limiting rod is connected between the two fixed plates. Two movable blocks are movably sleeved on the limiting rod. The movable blocks have threaded grooves for the first bidirectional screw to pass through. The movable blocks are located at one end of the fixed rod.

[0015] Preferably, the second limiting structure includes a second bidirectional screw that rotates through the clamping cover. A second rotating block is fitted on both ends of the second bidirectional screw that protrude from the clamping cover. The left and right sections of the second bidirectional screw have opposite thread directions. Two limiting blocks are tightly fitted to the inner wall of the clamping cover. The limiting blocks have threaded grooves for the second bidirectional screw to pass through.

[0016] Preferably, the first limiting structure includes a limiting strip that moves through the fixed rod near the bottom end, the bottom end of the limiting strip being inclined, a threaded rod that rotates through the fixed rod above the limiting strip, the threaded rod passing through a threaded groove opened on the limiting strip, an end block being provided at one end of the threaded rod, a third rotating block being provided at the other end of the threaded rod, and an indicator structure being provided on the fixed rod.

[0017] Preferably, the indicating structure includes an indicating strip disposed at the top of the limiting strip, and a scale strip disposed on the fixing rod, with one pointed end of the indicating strip extending onto the scale strip.

[0018] Preferably, the screening structure includes a groove formed in the middle of the inner wall of the collecting cylinder, a partition plate is movably disposed in the groove, a plurality of sieve holes are formed on the partition plate, a plurality of second cylindrical rods are movably passed through the upper edge of the partition plate, two second springs are sleeved on the second cylindrical rods, and the two ends of the second springs are respectively connected to the partition plate and the groove wall.

[0019] In summary, the present invention has the following beneficial technical effects:

[0020] 1. This invention, by setting up a rotating structure, a supporting structure, a material storage structure, and a cutting structure, enables the continuous feeding of the material storage structure onto the supporting structure during the processing of metal round bars. The rotating structure also enables the cutting structure to continuously cut the metal round bars fed onto the supporting structure. This significantly saves working time and increases the efficiency of cutting and processing metal round bars.

[0021] 2. This invention features a material support structure and a screening structure inside the collection cylinder. The material support structure supports the metal rod below the support structure, and rotates along with the rotating structure. As the material support structure moves away from the bottom of the cut metal rod, the cut metal rod can be automatically discharged into the collection cylinder for collection. Furthermore, the screening structure can classify and collect the metal rod and debris in the collection cylinder, facilitating processing.

[0022] 3. By setting up a clamping structure, a first limiting structure, and a second limiting structure, the present invention uses the clamping structure to clamp and fix the metal round bar during cutting, and under the action of the first limiting structure and the second limiting structure, it can limit the metal round bars of different sizes, making it more flexible to use. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a metal round bar cutting device according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the disassembled collection cylinder in an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure at the first and second annular plates in an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure at the rotating plate in an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure at the cutting point in an embodiment of the present invention;

[0028] Figure 6 This is an embodiment of the present invention. Figure 5 Enlarged view of the structure at point A;

[0029] Figure 7 This is a schematic diagram of the structure of the sealing cover in an embodiment of the present invention;

[0030] Figure 8 This is a schematic diagram of the structure of the collection cylinder in an embodiment of the present invention;

[0031] Figure 9 This is an embodiment of the present invention. Figure 8 Enlarged view of the structure at point B.

[0032] Explanation of reference numerals in the attached drawings: 1. Chassis; 2. First annular plate; 3. Support rod; 4. Connecting plate; 5. Second annular plate; 6. Feed chute; 7. Mounting cylinder; 8. First motor; 9. Rotating column; 10. Rotating plate; 11. Mounting frame; 12. Feeding frame; 13. Discharge frame; 14. Cylinder; 15. Lifting plate; 16. Vertical rod; 17. Square cover; 18. Second motor; 19. Cutting blade; 20. Fixing rod; 21. Square sleeve; 22. Sleeve; 23. First spring ; 24. Clamping cover; 25. Fixing plate; 26. First bidirectional screw; 27. Moving block; 28. First rotating block; 29. ​​Second bidirectional screw; 30. Second rotating block; 31. Limiting block; 32. Limiting strip; 33. Threaded rod; 34. End block; 35. Third rotating block; 36. Indicator strip; 37. Scale strip; 38. First cylindrical rod; 39. Support plate; 40. Collection cylinder; 41. Divider plate; 42. Groove; 43. Second cylindrical rod; 44. Second spring. Detailed Implementation

[0033] The following is in conjunction with the appendix Figures 1-9 The present invention will be described in further detail below.

[0034] Reference Figures 1-9 This invention discloses a metal round bar cutting device, including a chassis 1, a rotating structure arranged in the middle of the chassis 1, a support structure arranged above the chassis 1, a collecting cylinder 40 arranged on the chassis 1, and a screening structure arranged inside the collecting cylinder 40.

[0035] The rotating structure includes a mounting cylinder 7 located in the middle of the chassis 1. A first motor 8 is installed inside the mounting cylinder 7. The top of the output shaft of the first motor 8 is connected to a rotating column 9. A rotating plate 10 is fixedly sleeved on the top of the rotating column 9. A material storage structure is provided at one end of the rotating plate 10, and a cutting structure is provided at the other end of the rotating plate 10.

[0036] The support structure includes support rods 3 connected to the side of the chassis 1. The top ends of the two support rods 3 are connected to the first annular plate 2. A second annular plate 5 is provided inside the first annular plate 2. A cutting gap is left between the first annular plate 2 and the second annular plate 5. The first annular plate 2 and the second annular plate 5 are connected by multiple connecting plates 4. The multiple connecting plates 4 are distributed at equal angles around the circumference. Multiple sets of material discharge grooves 6 are opened on the first annular plate 2 and the second annular plate 5. A material support structure is provided below the first annular plate 2 and the second annular plate 5.

[0037] The material storage structure includes a mounting frame 11 set at one end of the rotating plate 10, a feeding frame 12 fixedly passing through the mounting frame 11, and a discharge frame 13 installed above the rear side of the feeding frame 12. The discharge frame 13 is inclined downward toward the feeding frame 12.

[0038] The cutting structure includes a cylinder 14 installed on the other end of the rotating plate 10. The top of the output shaft of the cylinder 14 is connected to a lifting plate 15. Vertical rods 16 are connected to the four corners of the lifting plate 15. The vertical rods 16 move through the rotating plate 10. A square cover 17 is connected to the bottom of the vertical rods 16. A second motor 18 is installed in the middle of the rear side of the square cover 17. The output shaft of the second motor 18 is inserted into the square cover 17, and a cutting blade 19 is installed at one end. A clamping structure is provided on the square cover 17.

[0039] The material support structure includes a support plate 39 that is attached to the bottom of the first annular plate 2 and the second annular plate 5. The included angle between the two sides of the support plate 39 is 220 degrees. Multiple first cylindrical rods 38 are connected to the inner side of the support plate 39. One end of each first cylindrical rod 38 is connected to a rotating column 9. First, multiple metal rods to be cut are placed in the feeding frame 12 and the discharge frame 13. The lowest metal rod in the feeding frame 12 is supported on the first annular plate 2 and the second annular plate 5. Then, the first motor 8 in the mounting cylinder 7 is started to drive the rotating column 9 and the rotating plate 10 to rotate clockwise. When the feeding frame 12 rotates to the discharge slot 6 of the first annular plate 2 and the second annular plate 5, the metal rods fall from the feeding frame 12 into the corresponding discharge slot 6 under their own weight. In this process, the metal rod is supported on the support plate 39, and the rotating plate 10 will simultaneously drive the cutting blade 19 to rotate above the metal rod. At this time, the cylinder 14 on the rotating plate 10 is activated to drive the lifting plate 15, the vertical rod 16 and the cutting blade 19 to move downward as a whole. At the same time, the second motor 18 on the square cover 17 is activated to drive the cutting blade 19 to rotate. The rotating cutting blade 19 cuts the metal rod on the support plate 39. As the support plate 39 rotates synchronously with the rotating column 9, when the support plate 39 detaches from the bottom of the cut metal rod, the cut metal rod can automatically fall from the feeding trough 6 to the collecting cylinder 40 for unloading. This allows for continuous feeding, cutting and unloading of metal rods, greatly saving working time and improving work efficiency.

[0040] See Figures 4-9 The clamping structure includes two fixing rods 20 set on the square cover 17. A first limiting structure is set on the fixing rods 20 near the bottom end. The fixing rods 20 are set on the square cover 17 through an adjustment structure. A sleeve 22 is movably sleeved on the bottom end of each fixing rod 20. A square sleeve 21 is fixedly sleeved on the fixing rod 20 above the sleeve 22. A first spring 23 is connected between the sleeve 22 and the square sleeve 21. A clamping cover 24 is set at the bottom end of the sleeve 22. A second limiting structure is set inside the clamping cover 24.

[0041] The adjustment structure includes two fixed plates 25 fastened to the square cover 17 by bolts. A first bidirectional screw 26 rotatably passes through the fixed plates 25. A first rotating block 28 is fixedly sleeved at both ends of the first bidirectional screw 26. The front and rear threads of the first bidirectional screw 26 are in opposite directions. A limiting rod is connected between the two fixed plates 25. Two movable blocks 27 are movably sleeved on the limiting rod. The movable blocks 27 have threaded grooves for the first bidirectional screw 26 to pass through. The movable blocks 27 are located at one end of the fixed rod 20.

[0042] The second limiting structure includes a second bidirectional screw 29 that rotates through the clamping cover 24. The two ends of the second bidirectional screw 29 that pass through the clamping cover 24 are each fitted with a second rotating block 30. The left and right sections of the second bidirectional screw 29 have opposite thread directions. Two limiting blocks 31 are tightly fitted on the inner wall of the clamping cover 24. The limiting blocks 31 have threaded grooves for the second bidirectional screw 29 to pass through.

[0043] The first limiting structure includes a limiting strip 32 that moves through the fixed rod 20 near the bottom end. The bottom end of the limiting strip 32 is inclined. A threaded rod 33 rotates through the fixed rod 20 above the limiting strip 32. The threaded rod 33 passes through a threaded groove opened on the limiting strip 32. One end of the threaded rod 33 is provided with an end block 34. The other end of the threaded rod 33 is provided with a third rotating block 35. An indicator structure is provided on the fixed rod 20.

[0044] The indicating structure includes an indicator strip 36 located at the top of the limiting strip 32, and a scale strip 37 on the fixed rod 20. The pointed end of the indicator strip 36 extends onto the scale strip 37. Before cutting, based on the actual length and outer diameter of the metal rod, the first rotating block 28 rotates the first bidirectional screw 26, and the two moving blocks 27 synchronously drive the two fixed rods 20 to move in opposite directions, thereby adjusting the clamping position of the clamping cover 24 on the metal rod. Then, the third rotating block 35 rotates the threaded rod 33, and the limiting strip 32 moves on the threaded rod 33 to adjust the clamping position of the metal rod according to the length and outer diameter of the metal rod. The actual length allows for flexible adjustment of the spacing between the two limiting bars 32. During movement, the limiting bars 32 drive the indicator bar 36 to move. The scale on the scale bar 37 ensures that the two limiting bars 32 move the same distance, thus guaranteeing the accuracy of the cutting position on the metal bar and improving cutting quality. Then, the second rotating block 30 rotates the second bidirectional screw 29, causing the two limiting blocks 31 to move synchronously in opposite directions on the second bidirectional screw 29. This allows for flexible adjustment of the positions of the two limiting blocks 31 according to the actual outer diameter of the metal bar, making it more convenient to use.

[0045] See Figure 9 The screening structure includes a groove 42 located in the middle of the inner wall of the collection cylinder 40. A partition plate 41 is movably disposed in the groove 42. The partition plate 41 has several screen holes. Multiple second cylindrical rods 43 movably pass through the upper edge of the partition plate 41. Two second springs 44 are sleeved on the second cylindrical rods 43. The two ends of the second springs 44 are respectively connected to the partition plate 41 and the groove wall of the groove 42. When the metal rod is fed onto the partition plate 41 on the collection cylinder 40, the impact of the falling metal rod on the partition plate 41, combined with the elastic force of the second springs 44, drives the partition plate 41 to move up and down inside the collection cylinder 40, thereby screening the falling debris to the area below the partition plate 41. This allows for the classification and collection of the cut metal rod and the debris generated during the cutting process, facilitating centralized processing.

[0046] The implementation principle of a metal rod cutting device according to an embodiment of the present invention is as follows: Before cutting, based on the actual length and outer diameter of the metal rod, the first rotating block 28 rotates the first bidirectional screw 26, and the two moving blocks 27 synchronously drive the two fixed rods 20 to move in opposite directions, thereby adjusting the clamping position of the clamping cover 24 on the metal rod. Then, the third rotating block 35 rotates the threaded rod 33, and the limiting strip 32 moves on the threaded rod 33 to flexibly adjust the distance between the two limiting strips 32 according to the actual length of the metal rod. During the movement of the limiting strip 32, the indicator strip 36 moves, and the distance is adjusted by the scale strip 37. The scale is used to ensure that the two limiting blocks 32 move the same distance, thereby ensuring the accuracy of the cutting position on the metal bar and improving the cutting quality. Then, the second rotating block 30 rotates the second bidirectional screw 29, and the two limiting blocks 31 move synchronously in opposite directions on the second bidirectional screw 29, so that the position of the two limiting blocks 31 can be flexibly adjusted according to the actual outer diameter of the metal bar. Next, the multiple metal bars to be cut are placed in the feeding frame 12 and the unloading frame 13. The bottom metal bar in the feeding frame 12 is supported on the first annular plate 2 and the second annular plate 5. Then, the first motor 8 in the mounting cylinder 7 is started to drive the rotating column 9 and the rotating plate 10. The entire assembly rotates clockwise. When the feeding frame 12 rotates to the feeding slot 6 of the first annular plate 2 and the second annular plate 5, the metal rods fall sequentially from the feeding frame 12 into the corresponding feeding slots 6 under their own weight. The metal rods are supported on the support plate 39. Simultaneously, the rotating plate 10 drives the cutting blade 19 to rotate above the feeding metal rods. At this time, the cylinder 14 on the rotating plate 10 is activated, causing the lifting plate 15, the vertical rod 16, and the cutting blade 19 to move downwards as a whole. At the same time, the second motor 18 on the square cover 17 is activated, causing the cutting blade 19 to rotate. The rotating cutting blade 19 cuts the metal rods on the support plate 39. Furthermore, as the pallet 39 rotates synchronously with the rotating column 9, when the pallet 39 detaches from below the cut metal bar, the cut metal bar can automatically fall from the feeding trough 6 into the collection cylinder 40 for unloading. This allows for continuous feeding, cutting, and unloading of the metal bar, greatly saving working time and improving work efficiency. Moreover, the impact of the falling metal bar on the partition plate 41, combined with the elasticity of the second spring 44, drives the partition plate 41 to move up and down within the collection cylinder 40, thereby screening the fallen debris below the partition plate 41. This allows for the classification and collection of the cut metal bar and the debris generated during the cutting process, facilitating centralized processing.

[0047] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A cutting device for metal round bars, comprising a chassis (1), characterized in that: A rotating structure is provided at the middle of the chassis (1), a supporting structure is provided above the chassis (1), a collecting cylinder (40) is provided on the chassis (1), and a screening structure is provided inside the collecting cylinder (40); The rotating structure includes a mounting cylinder (7) located in the middle of the chassis (1), a first motor (8) is installed inside the mounting cylinder (7), the top of the output shaft of the first motor (8) is connected to a rotating column (9), a rotating plate (10) is fixedly sleeved on the top of the rotating column (9), a material storage structure is provided at one end of the rotating plate (10), and a cutting structure is provided at the other end of the rotating plate (10); The support structure includes a support rod (3) connected to the side of the chassis (1). The top ends of the two support rods (3) are connected to the first annular plate (2). A second annular plate (5) is provided inside the first annular plate (2). A cutting gap is left between the first annular plate (2) and the second annular plate (5). The first annular plate (2) and the second annular plate (5) are connected by multiple connecting plates (4). The multiple connecting plates (4) are distributed at equal angles around the circumference. Multiple sets of feeding grooves (6) are opened on the first annular plate (2) and the second annular plate (5). A material support structure is provided below the first annular plate (2) and the second annular plate (5).

2. The metal round bar cutting device according to claim 1, characterized in that: The storage structure includes an installation frame (11) set at one end of the rotating plate (10), a feeding frame (12) is fixedly passed through the installation frame (11), and a feeding frame (13) is installed above the rear side of the feeding frame (12). The feeding frame (13) is inclined downward toward the feeding frame (12).

3. The metal round bar cutting device according to claim 1, characterized in that: The cutting structure includes a cylinder (14) installed at the other end of the rotating plate (10). The top of the output shaft of the cylinder (14) is connected to a lifting plate (15). Vertical rods (16) are connected to the four corners of the lifting plate (15). The vertical rods (16) move through the rotating plate (10). A square cover (17) is connected to the bottom of the vertical rods (16). A second motor (18) is installed in the middle of the rear side of the square cover (17). The output shaft of the second motor (18) is inserted into the square cover (17) and a cutting blade (19) is installed at one end. A clamping structure is provided on the square cover (17).

4. The metal round bar cutting device according to claim 1, characterized in that: The material support structure includes a support plate (39) attached to the bottom of the first annular plate (2) and the second annular plate (5). The included angle between the two sides of the support plate (39) is 220 degrees. Multiple first cylindrical rods (38) are connected to the inner side of the support plate (39). One end of the first cylindrical rod (38) is connected to the rotating column (9).

5. The metal round bar cutting device according to claim 3, characterized in that: The clamping structure includes two fixed rods (20) set on a square cover (17). A first limiting structure is set on the fixed rod (20) near the bottom end. The fixed rod (20) is set on the square cover (17) through an adjustment structure. A sleeve (22) is movably sleeved on the bottom end of each fixed rod (20). A square sleeve (21) is fixedly sleeved on the fixed rod (20) above the sleeve (22). A first spring (23) is connected between the sleeve (22) and the square sleeve (21). A clamping cover (24) is set on the bottom end of the sleeve (22). A second limiting structure is set inside the clamping cover (24).

6. The metal round bar cutting device according to claim 5, characterized in that: The adjustment structure includes two fixing plates (25) fastened to the square cover (17) by bolts. A first bidirectional screw (26) is rotatably passed through the fixing plates (25). A first rotating block (28) is fixedly sleeved at both ends of the first bidirectional screw (26). The front and rear threads of the first bidirectional screw (26) are opposite in direction. A limiting rod is connected between the two fixing plates (25). Two moving blocks (27) are movably sleeved on the limiting rod. The moving blocks (27) have threaded grooves for the first bidirectional screw (26) to pass through. The moving blocks (27) are located at one end of the fixing rod (20).

7. The metal round bar cutting device according to claim 5, characterized in that: The second limiting structure includes a second bidirectional screw (29) that rotates through the clamping cover (24). The two ends of the second bidirectional screw (29) that pass through the clamping cover (24) are fitted with second rotating blocks (30). The left and right sections of the second bidirectional screw (29) have opposite thread directions. Two limiting blocks (31) are tightly fitted on the inner wall of the clamping cover (24). The limiting blocks (31) have threaded grooves for the second bidirectional screw (29) to pass through.

8. The metal round bar cutting device according to claim 5, characterized in that: The first limiting structure includes a limiting strip (32) that moves through the fixed rod (20) near the bottom end. The bottom end of the limiting strip (32) is inclined. A threaded rod (33) rotates through the fixed rod (20) above the limiting strip (32). The threaded rod (33) passes through a threaded groove opened on the limiting strip (32). One end of the threaded rod (33) is provided with an end block (34). The other end of the threaded rod (33) is provided with a third rotating block (35). An indicator structure is provided on the fixed rod (20).

9. The metal round bar cutting device according to claim 8, characterized in that: The indicator structure includes an indicator strip (36) set at the top of the limiting strip (32), and a scale strip (37) set on the fixing rod (20). The pointed end of the indicator strip (36) extends to the scale strip (37).

10. The metal round bar cutting device according to claim 1, characterized in that: The screening structure includes a groove (42) opened in the middle of the inner wall of the collecting cylinder (40). A partition plate (41) is movably arranged in the groove (42). A number of sieve holes are opened on the partition plate (41). Multiple second cylindrical rods (43) movably pass through the upper edge of the partition plate (41). Two second springs (44) are sleeved on the second cylindrical rods (43). The two ends of the second springs (44) are respectively connected to the partition plate (41) and the groove wall of the groove (42).

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