Bar screening device

Abstract

The invention discloses a bar screening device, and belongs to the technical field of bar screening mechanisms, the bar screening device comprises two symmetrically arranged vertical rods, a cross beam, a first clamp, a working rod and an adhesive tape, after the cross beam descends, the adhesive tape on the working rod is pressed on a bar, and when the cross beam moves upwards, the adhesive tape takes up one end of the adhered bar. According to the bar screening device, bar materials can be glued through the adhesive tape, so that the bar materials are screened out, and the bar screening device is suitable for screening of quartz bars, silicon bars and other bar materials; a shifting rod and a material receiving assembly are arranged, so that the bars are screened out; the working rod can be rapidly adjusted to the preset height, the micrometer head is arranged, the displacement distance of the working rod can be accurate to 0.01 mm, and different bars with small diameter difference can be accurately screened; an upper guide-in opening and a lower guide-in opening are formed in a guide sliding groove in the deflector rod, a good fool-proof effect can be achieved, and the deflector rod or the first side plate is prevented from being damaged after the cross beam excessively displaces.

Description

Technical Field

[0001] The invention belongs to the technical field of bar screening, and in particular relates to a bar screening device. Background Art

[0002] During the preparation process of quartz rods, due to factors such as production process and equipment, the outer diameters will be different, and the difference will be more obvious in different batches. When cutting the rods into granules, the quartz rods need to be fixed in a special fixture. The different thicknesses of the quartz rods will cause the thick ones to be crushed by the fixture, and the thin ones will not be clamped tightly. During the cutting process, it will cause flying and collapsing of the material. In minor cases, the cutting blade will be stuck, damaging the equipment, and in serious cases, personal injury may occur. In addition, the particles cut from the rods need to be provided in different sizes according to the requirements of downstream customers and screened in advance, so quartz rods of different diameters need to be screened in advance. The existing method is manual visual screening, which is labor-intensive and has low screening efficiency. Summary of the invention

[0003] In view of the above problems existing in the prior art, the technical problem to be solved by the present invention is to provide a bar screening device capable of conveniently screening bars of different diameters.

[0004] Technical solution: In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0005] A bar material screening device comprises two symmetrically arranged vertical poles, a horizontal beam movably connected between the two vertical poles, a first clamp connected to the horizontal beam, a working rod connected to the first clamp, and a tape arranged at the lower end of the working rod and used for adhering the bar material. When the horizontal beam descends, the tape on the working rod is pressed onto the bar material, and when the horizontal beam moves upward, the tape lifts up one end of the adhered bar material.

[0006] Preferably, a shift rod is connected to the cross beam, and the two vertical rods are movably connected with a material receiving assembly corresponding to the shift rod, and the material receiving assembly includes two oppositely arranged first side plates and a material blocking rod and a material receiving rod connected between the two first side plates, the two vertical rods are respectively provided with support rods corresponding to the first side plates, the support rods are provided with bearing seats, and the first side plate is provided with a rotating shaft corresponding to the bearing seat, when the shift rod moves upward, it shifts the first side plate to rotate downward around the rotating shaft, and when the first side plate rotates downward, it drives the material receiving rod to rotate downward to below the lifted end of the rod, and after the material blocking rod blocks the lifted end of the rod, the rod falls onto the material receiving rod.

[0007] Preferably, a first guide block is provided on the first side plate, and a guide slot corresponding to the first guide block is provided on the lever, and the guide slot is U-shaped.

[0008] Preferably, the guide slot is provided with an upper introduction port and a lower introduction port for introducing the first guide block.

[0009] Preferably, the shift rod is an L-shaped plate, the first side plate is a V-shaped plate, the first side plate includes a first support plate and a second support plate, the material blocking rod and the material receiving rod are arranged on the second support plate, and when the cross beam drives the working rod to move to the lowest point, the plane where the material blocking rod and the material receiving rod are located is parallel to the ground.

[0010] Preferably, the second support plate is provided with an adjusting slot hole, and the material blocking rod and the material receiving rod are connected to the second support plate via the adjusting slot hole.

[0011] Preferably, a first functional plate is provided on the crossbeam, the first clamp is arranged on the first functional plate, the working rod comprises a cross bar and an adjusting rod connected to the cross bar, the adjusting rod is clamped by the first clamp, and the adjusting rod adjusts the height of the cross bar after moving up and down.

[0012] Preferably, a micrometer head corresponding to the adjusting rod is provided on the first functional plate.

[0013] Preferably, the adjusting rod is provided with a scale mark, and the first clamp is provided with an arrow mark corresponding to the scale mark.

[0014] Preferably, a second functional plate is provided on the crossbeam, a guide rod is provided on the working rod, a second guide block is provided on the guide rod, and a second slide rail corresponding to the second guide block is provided on the second functional plate.

[0015] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0016] 1. By setting the crossbeam, the first clamp, the working rod and the tape, the rods can be glued by the tape. When the crossbeam moves up, the tape lifts one end of the rods, thereby screening out the rods. It is suitable for screening quartz rods, silicon rods and other rods;

[0017] 2. A lever and a material receiving assembly are provided. The material receiving assembly includes a first side plate, a material blocking rod and a material receiving rod. When the crossbeam moves upward, the lever fluctuates and the material receiving assembly rotates, so that the material receiving rod moves below one end of the bar material. One end of the bar material is blocked by the material blocking rod during the rising process, and one end of the bar material falls and is caught by the material receiving rod, so that the bar material is screened out;

[0018] 3. Setting the first clamp can quickly fix or loosen the working rod. Setting the scale mark and arrow mark can quickly adjust the working rod to a predetermined height. Setting the micrometer head can accurately move the working rod to 0.01mm. Different bars with small diameter differences can also be accurately screened.

[0019] 4. The guide slot on the lever is provided with an upper guide port and a lower guide port, which can play a good fool-proof role and prevent the lever or the first side plate from being damaged due to excessive displacement of the crossbeam;

[0020] 5. For bars of different lengths and diameters, one end can be aligned and placed under the working rod to screen the bars at the same time. This is suitable for bars of different lengths within a certain range, and the screening of bars has a wide range of adaptability and is fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0022] Figure 2 yes Figure 1 A magnified view of the structure in the middle;

[0023] Figure 3 is a schematic diagram of the front structure of the crossbeam in the embodiment;

[0024] Figure 4 is a schematic diagram of the three-dimensional structure of the embodiment from another angle;

[0025] Figure 5 2. It is a schematic structural diagram of a material receiving assembly in an embodiment;

[0026] Figure 6 is a schematic diagram of the three-dimensional structure of the lever in the embodiment;

[0027] Figure 7 2 is a schematic diagram of the structure of the lever in the embodiment;

[0028] Figure 8 It is a schematic diagram of the structure of a certain state of the device during the working process of the embodiment;

[0029] Fig. 9 It is a schematic diagram of the structure of another state of the device during the working process of the embodiment. DETAILED DESCRIPTION

[0030] The present invention is further illustrated below in conjunction with specific examples. The examples are implemented based on the technical solutions of the present invention. It should be understood that these examples are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0031] like Figure 1 , Figure 2 and Figure 3As shown, a bar material screening device includes a vertical pole 1, a horizontal beam 2, a first clamp 3, a working rod 4, an adhesive tape 5, a lever 6, a material receiving assembly 7 and a micrometer head 8. Two vertical poles 1 are provided, and the two vertical poles 1 are symmetrically arranged on a bottom plate 9. The horizontal beam 2 is arranged between the two vertical poles 1. The two vertical poles 1 are each provided with a first slide rail. The two ends of the horizontal beam 2 are respectively slidably connected with the corresponding vertical poles 1 through the first slide rails. When used in this embodiment, the staff manually pushes the horizontal beam 2 to move up and down. The two vertical poles 1 are also provided with a low-limiting block, which is arranged at the lower end of the vertical pole 1 and has a certain height. The low-limiting block is used to limit the lowest point of the horizontal beam 2. When the horizontal beam 2 slides downward to a certain position, it is blocked by the low-limiting block and cannot continue to move downward. A first functional board 21 is provided in the middle position on one side of the front of the crossbeam 2. The first functional board 21 is a vertically arranged rectangular board. The first clamp 3 is connected to the first functional board 21. The first clamp 3 adopts an existing quick clamp, such as a cam side-pushing quick clamp produced by Japan Kanao IMAO. The first clamp 3 includes a quick-opening wrench 31. When the quick-opening wrench 31 is perpendicular to the ground, the first clamp 3 is in a clamped state. When the quick-opening wrench 31 is parallel to the ground, the first clamp 3 is in a loosened state. The working rod 4 is connected to the first clamp 3. The working rod 4 includes a crossbar 41, an adjusting rod 42 and a guide rod 43. The crossbar 41 is parallel to the crossbeam 2, and the adjusting rod 42 is perpendicular to the crossbar 41. The lower end of the adjusting rod 42 is connected to the middle position of the upper end surface of the crossbar 41. The adjusting rod 42 is clamped by the first clamp 3. When the quick-opening wrench 31 is pulled to make the first clamp 3 in a loosened state, the adjusting rod 42 can move up and down. After the adjusting rod 42 moves up and down, the height of the crossbar 41 is adjusted. There are two guide rods 43, which are arranged on both sides of the adjusting rod 42 and the lower ends of the guide rods 43 are connected to the cross bar 41. Two second functional plates 22 are arranged on the cross beam 2, and the second functional plates 22 are liquid level rectangular plates. The positions of the two second functional plates 22 correspond to the two guide rods 43 one by one. A second guide block 431 is arranged on the upper end of the guide rod 43, and a second slide rail 221 corresponding to the second guide block 431 is arranged on the second functional plate 22. When the cross bar 41 moves up and down, the second guide block 431 moves on the second slide rail 221. The second guide block 431 and the second slide rail 221 can play a guiding and limiting role when the cross bar 41 moves up and down, so as to prevent the two ends of the cross bar 41 from being uneven. A scale mark 421 is provided on the front side of the adjustment rod 42, and the scale mark 421 is accurate to millimeters. An arrow mark 422 is provided on the first clamp 3, and the position of the arrow mark 422 corresponds to the position of the scale mark 421. The tip of the arrow mark 422 can point to a certain scale on the scale mark 421, which is convenient for personnel to observe.

[0032] like Figure 2 and Figure 3As shown, the tape 5 is arranged at the lower end of the working rod 4. The tape 5 adopts the existing double-sided tape. The double-sided tape adopts a thin double-sided tape with a thickness of 0.05mm. One side of the tape 5 is bonded to the lower end surface of the working rod 4, and the other side of the tape 5 is used to adhere the rod material. When the beam 2 descends, the tape 5 on the working rod 4 is pressed on the rod material, and when the beam 2 moves up, the tape 5 lifts one end of the adhered rod material.

[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7As shown, the two ends of the crossbeam 2 are respectively connected with a lever 6, and the two levers 6 are symmetrically arranged. The front faces of the two vertical poles 1 are respectively connected with a support rod 11, and the support rod 11 is perpendicular to the vertical pole 1. The material receiving assembly 7 is arranged between the two support rods 11 and is movably connected to the two support rods 11. The material receiving assembly 7 includes two first side plates 71, a material blocking rod 72 and a material receiving rod 73. The two first side plates 71 are relatively arranged and the positions of the two first side plates 71 correspond to the positions of the two levers 6 one by one. The material blocking rod 72 and the material receiving rod 73 It is connected between the two first side plates 71, the first side plate 71 is a V-shaped plate, the first side plate 71 includes a first support plate 701 and a second support plate 702, the angle between the first support plate 701 and the second support plate 702 is 135°, a rotating shaft 711 is provided in the middle position of the outer side surface of the first side plate 71, a bearing seat 12 is provided on the support rod 11, the bearing seat 12 corresponds to the rotating shaft 711, and the rotating shaft 711 is inserted into the bearing of the bearing seat 12, so that the first side plate 71 can rotate relative to the support rod 11 with the rotating shaft 711 as the axis. The first side plate 71 is provided with a first guide block 712 on the outer side surface of the first support plate 701 of the first side plate 71. The first guide block 712 is a cylindrical block and is perpendicular to the outer side surface of the first support plate 701. The lever 6 is provided with a guide slot 61 corresponding to the first guide block 712. The lever 6 is an L-shaped plate. The L-shaped lever 6 includes a vertical plate and a horizontal plate. The vertical plate is connected to the horizontal beam 2. The guide slot 61 is arranged on the inner side surface of the horizontal plate. The guide slot 61 is U-shaped. When the lever 6 moves up and down, the first guide block 712 slides in the guide slot 61, so that the first side plate 71 is rotated when the lever 6 moves up and down. The guide slot 61 is provided with an upper introduction port 611 and a lower introduction port 612. The two introduction ports are used to introduce the first guide block 712 into the guide slot 61. The upper introduction port 611 is arranged on the upper end surface of the horizontal plate and is communicated with the guide slot 61. The lower introduction port 612 is arranged on the lower end surface of the horizontal plate and is communicated with the guide slot 61. When the screening device is in the initial position, the tape 5 has not yet adhered to the lower end surface of the cross bar 41, and the cross beam 2 moves downward to the lowest end so that the lower end surface of the cross bar 41 is attached to the upper end surface of the bottom plate 9. At this time, the first guide blocks 712 on the two first side plates 71 respectively enter the corresponding guide slots 61 through the corresponding upper inlets 611. At this time, the second support plate 702 is parallel to the ground. When the cross beam 2 moves upward, it drives the lever 6 to move upward. When the lever 6 moves upward, it guides the first guide block 712 to move to the innermost side along the upper slide of the guide slot 61, and then moves to the outer side along the lower slide of the guide slot 61 after moving to the innermost side. In this process, the lever 6 drives the first side plate 71 to rotate downward around the rotating shaft 711 through the first guide block 712.The first stop 712 will be in the event that the lever 60 moves upwardly and the first stop 713 is in the event that the lever 60 moves upwardly and the first stop 714 is in the event that the lever 60 moves upwardly and the first stop 713 is in the event that the lever 60 moves upwardly and the first stop 714 is in the event that the lever 60 moves upwardly and the first stop 713 is in the event that the lever 60 moves upwardly and the first stop 714 is in the event that the lever 6

[0034] like Figure 2 , Figure 5 , Figure 8 and Fig. 9 As shown, the second support plate 702 is provided with an adjustment slot 703, which is arranged in the middle position of the second support plate 702 and extends along the length direction of the second support plate 702. The material stopping rod 72 and the material receiving rod 73 are arranged between the two second support plates 702. Threaded columns are respectively provided at both ends of the material stopping rod 72, and the threaded columns pass through the corresponding adjustment slots 703. The threaded columns are threadedly connected with a first locking nut 741 and a second locking nut 742. The first locking nut 741 and the second locking nut 742 are respectively located on both sides of the second support plate 702, so that the material stopping rod 72 can be fixed on the second support plate 702 through the first locking nut 741 and the second locking nut 742, and the position of the material stopping rod 72 can be adjusted along the adjustment slot 703 by loosening the two locking nuts. When the screening device is in the initial position, the material stopping rod 72 is located directly above one end of the bar material. The shape and structure of the material receiving rod 73 are the same as those of the material blocking rod 72. The two ends of the material receiving rod 73 are also threadedly connected with a first locking nut 741 and a second locking nut 742. The material receiving rod 73 can be fixed to the second support plate 702 through the two locking nuts and the position of the material receiving rod 73 can be adjusted along the adjustment slot 703 by loosening the two locking nuts. When the screening device is in the initial position, the material receiving rod 73 is located in front of the material blocking rod 72 (such as Figure 2 as shown).

[0035] like Figure 2 , Figure 3 , Figure 8 and Fig. 9As shown, when the screening device is in the initial position, the adhesive tape 5 has not yet adhered to the lower end surface of the working rod 4, and the crossbeam 2 moves downward to the lowest end so that the lower end surface of the crossbeam 41 is attached to the upper end surface of the bottom plate 9, and the height is zeroed. At this time, the second support plate 702 of the first side plate 71 is in a horizontal position, and the plane where the material blocking rod 72 and the material receiving rod 73 are located is parallel to the ground. A limit frame 901 is set on the bottom plate 9, and the limit frame 901 is U-shaped. The limit frame 901 is located between the two vertical rods 1, and the front end plate of the limit frame 901 exceeds the front face of the crossbeam 2. When it is necessary to screen multiple diameters of bars, for example, multiple 5mm, multiple 4mm and multiple 3mm diameter bars are mixed together. Various rods are laid flat in the limit frame 901, with one end of the various rods resting against the inner wall of the front end plate of the limit frame 901, so that one ends of the various rods are flush and the rod bodies of the various rods are located under the cross bar 41. This one-end alignment method is suitable for rods of different lengths. For example, 40cm, 100cm and 150cm rods can be aligned at one end and placed under the cross bar 41 for screening at the same time. There is no strict limit on the length, and the screening range is wide. When screening, screen from large to small, first select and screen out the bars with a diameter of 5mm, turn the quick-open wrench 31 to loosen the first clamp 3, and move the adjustment rod 42 up 5mm by observing the scale mark 421 and the arrow mark 422. After moving up 5mm, turn the quick-open wrench 31 to clamp the first clamp 3, move the crossbeam 2 up to adhere the tape 5 to the lower end surface of the crossbeam 41 (or adhere the tape 5 to the lower end surface of the crossbeam 41 in advance but do not tear off the protective film, and after the height is zeroed, move the crossbeam 2 up to tear off the protective film on the surface of the tape 5), and then move the crossbeam 2 down to press the tape 5 on the 5mm bar. Since the 4mm and 3mm diameter bars are not high enough, they will not contact the tape 5. Move the crossbeam 2 up, and at this time the tape 5 will lift one end of the adhered 5mm bar (such as Figure 8 The cam 73 is pressed against the locking cam 72 when the lever 6 is moved upward, and the locking cam 73 is pressed against the locking cam 73 to move downward. Fig. 9As shown in the figure, the 5mm bars are screened out. After the 5mm bars in different batches of bars are screened out, the remaining 4mm and 3mm mixed bars are placed in the limit frame 901, and the 4mm bars are screened out. The quick-open wrench 31 is turned to loosen the adjustment rod 42. After the adjustment rod 42 is moved down by 1mm, the quick-open wrench 31 is turned to clamp the adjustment rod 42. The crossbeam 2 is moved down to press the tape 5 on the 4mm bars, thereby screening out the 4mm bars. The remaining bars in the limit frame 901 are 3mm bars. Since the thickness of the double-sided tape is 0.05mm, the bars with a diameter difference of more than 0.06mm can be screened, and the screening accuracy is high.

[0036] like Figure 1 , Figure 2 and Figure 3 As shown, a micrometer head 8 corresponding to the adjustment rod 42 is provided on the first functional board 21. The micrometer head 8 adopts an existing micrometer head, such as the Starrett micrometer head RV463 series, with a measuring range of 0-13mm. The measuring rod of the micrometer head 8 is used to abut against the upper end of the adjustment rod 42. The height of the adjustment rod 42 can be accurately adjusted by using the micrometer head 8. When the adjustment rod 42 is at the lowest point, the measuring rod of the micrometer head 8 is abutted against the upper end of the adjustment rod 42, and then the coarse adjustment knob of the micrometer head 8 is turned according to the diameter of the bar material to be screened. For example, in order to screen out 5mm bar material, the measuring rod of the micrometer head 8 is moved up by 5mm, the measuring rod is locked, and then the adjustment rod 42 is moved up so that the upper end of the adjustment rod 42 abuts against the measuring rod of the micrometer head 8. The accuracy of the micrometer head 8 can reach 0.01mm, so that the height of the adjustment rod 42 can be accurately adjusted. After using the micrometer 8 for precise positioning, in order to protect the micrometer 8, after the height of the adjusting rod 42 is accurately positioned, the quick-open wrench 31 is pulled to clamp the adjusting rod 42, the position of the adjusting rod 42 is fixed, and the micrometer 8 is continued to be adjusted so that the measuring rod of the micrometer 8 moves up and disengages from the top of the adjusting rod 42, so that when the cross bar 41 moves down to the bar material, the reaction force acting on the working rod 4 will not be transmitted to the micrometer 8, thereby protecting the micrometer 8. When in use, you can observe the scale mark 421 and the arrow mark 422, remember the scale indicated by the arrow mark 422 at the beginning, and after screening multiple batches, compare the indicated scale with the initial indicated scale, and observe whether the adjusting rod 42 has moved up and down.

[0037] Example 2

[0038] The difference from Example 1 is that the screening device of this embodiment also includes a displacement component, which is connected to the vertical pole 1. The displacement component is used to drive the crossbeam 2 to move up and down. The displacement component adopts an existing electric slide. The displacement component is connected between the two vertical poles 1. The displacement component includes a base, a drive motor, a screw rod and a slider (a screw-driven electric slide). The base is connected to the two vertical poles 1, the screw rod is rotatably connected to the base, the drive motor is arranged on the base and connected to the screw rod, the slider is movably connected to the screw rod, and when the drive motor is working, the slider is driven to move up and down by the screw rod. The slider is connected to the crossbeam 2, so that the drive motor can drive the crossbeam 2 to move up and down when it is working.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A bar screening device, characterized in that: The invention comprises two symmetrically arranged vertical poles (1), a horizontal beam (2) movably connected between the two vertical poles (1), a first clamp (3) connected to the horizontal beam (2), a working pole (4) connected to the first clamp (3), and an adhesive tape (5) arranged at the lower end of the working pole (4) and used for adhering a rod material, wherein the adhesive tape (5) on the working pole (4) is pressed onto the rod material when the horizontal beam (2) descends, and the adhesive tape (5) lifts one end of the adhered rod material when the horizontal beam (2) moves upward.

2. The bar material screening device according to claim 1, characterized in that: The cross beam (2) is connected with a lever (6), and the two vertical rods (1) are movably connected with a material receiving assembly (7) corresponding to the lever (6), the material receiving assembly (7) comprising two first side plates (71) arranged opposite to each other, a material blocking rod (72) and a material receiving rod (73) connected between the two first side plates (71), the two vertical rods (1) are respectively provided with a support rod (11) corresponding to the first side plates (71), the support rod (11) is provided with a bearing seat (12), and the first side plate (71) is provided with a rotating shaft (711) corresponding to the bearing seat (12), when the lever (6) moves upward, the first side plate (71) is driven to rotate downward around the rotating shaft (711), and when the first side plate (71) rotates downward, the material receiving rod (73) is driven to rotate downward to below the end of the bar material that is lifted, and after the material blocking rod (72) blocks the lifted end of the bar material, the bar material falls onto the material receiving rod (73).

3. The bar material screening device according to claim 2, characterized in that: The first side plate (71) is provided with a first guide block (712), the lever (6) is provided with a guide slot (61) corresponding to the first guide block (712), and the guide slot (61) is U-shaped.

4. The bar material screening device according to claim 3, characterized in that: The guide sliding groove (61) is provided with an upper introduction port (611) and a lower introduction port (612) for introducing the first guide block (712).

5. The bar material screening device according to claim 2, characterized in that: The shifting rod (6) is an L-shaped plate, the first side plate (71) is a V-shaped plate, the first side plate (71) comprises a first support plate (701) and a second support plate (702), the material blocking rod (72) and the material receiving rod (73) are arranged on the second support plate (702), and when the cross beam (2) drives the working rod (4) to move to the lowest point, the plane where the material blocking rod (72) and the material receiving rod (73) are located is parallel to the ground.

6. The bar material screening device according to claim 5, characterized in that: The second support plate (702) is provided with an adjustment slot hole (703), and the material blocking rod (72) and the material receiving rod (73) are connected to the second support plate (702) via the adjustment slot hole (703).

7. The bar material screening device according to claim 1, characterized in that: The crossbeam (2) is provided with a first functional plate (21), the first clamp (3) is arranged on the first functional plate (21), the working rod (4) comprises a cross bar (41) and an adjusting rod (42) connected to the cross bar (41), the adjusting rod (42) is clamped by the first clamp (3), and the adjusting rod (42) adjusts the height of the cross bar (41) by moving up and down.

8. The bar material screening device according to claim 7, characterized in that: The first functional plate (21) is provided with a micrometer head (8) corresponding to the adjustment rod (42).

9. The bar material screening device according to claim 7, characterized in that: The adjusting rod (42) is provided with a scale mark (421), and the first clamp (3) is provided with an arrow mark (422) corresponding to the scale mark (421).

10. The bar material screening device according to claim 1, characterized in that: A second functional plate (22) is provided on the crossbeam (2), a guide rod (43) is provided on the working rod (4), a second guide block (431) is provided on the guide rod (43), and a second slide rail (221) corresponding to the second guide block (431) is provided on the second functional plate (22).

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