Method for replacing shear blade of trimming shear

Abstract

The invention discloses a method for replacing a shear blade of a trimming shear, which comprises the following steps of: fixing a rotating shaft by using a dismounting tool, and loosening a hydraulic nut for fastening the shear blade; a hydraulic nut and a pressing ring which are used for fastening the shear blade are sequentially detached; replacing a shear blade; a pressing ring and a hydraulic nut which are used for fastening the shear blade are sequentially installed; and checking the state of the hydraulic nut. According to the replacement method of the trimming shear blade, the rotating shaft can be fixed through the dismounting tool, so that the trimming shear blade can be directly replaced on a cold rolling production line, the replacement process of the shear blade is simplified, the replacement time is shortened, the rapid production rhythm of a continuous annealing line is adapted, and the production efficiency of the continuous annealing line is guaranteed.

Description

Technical Field

[0001] The present application belongs to the technical field of cold rolling production line maintenance, and specifically relates to a method for replacing a shearing blade of a trimming shear. Background Art

[0002] After continuous annealing, the cold-rolled strip needs to be trimmed with trimming shears to ensure that the strip meets customer requirements. In order to ensure that the trimming shears in the cold rolling production line are in good working condition, the trimming shear blades need to be replaced regularly.

[0003] When replacing the cutting blade of the existing trimming shears, there is no tool or method to fix the rotating shaft on the production line. The trimming shears can only be removed from the cold rolling production line and transported to the workbench to fix the rotating shaft before removing and replacing the cutting blade. The whole process takes a long time and the working conditions are relatively complicated, which will greatly reduce the production efficiency. Therefore, inventing a method for quickly replacing the cutting blade of the trimming shears on the production line is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a method for replacing the cutting blade of a trimming shear, so as to solve the technical problem in the prior art that the replacement process of the cutting blade of the trimming shear is time-consuming and labor-intensive, thus affecting production efficiency.

[0005] The technical solution adopted to achieve the purpose of this application is:

[0006] A method for replacing a cutting blade of a trimming shear, the method comprising the following steps:

[0007] Use the disassembly tool to fix the shaft and loosen the hydraulic nut used to tighten the shear blade;

[0008] Remove the hydraulic nut and pressure ring used to fasten the shear blade in sequence;

[0009] Replace the shear blades;

[0010] Install the compression ring and hydraulic nut for fastening the shear blade in sequence;

[0011] Check the condition of the hydraulic nut.

[0012] In order to better realize the present application, further optimization is made in the above structure, and the disassembly tool includes a disassembly rod and a limiting rod;

[0013] The disassembly lever comprises a rod body and two locking parts; the length of the disassembly lever is greater than the distance between the two rotating shafts; the two locking parts are arranged in an array from the fixed end of the disassembly lever to the movable end of the disassembly lever, and the axes of the locking parts are perpendicular to the axes of the rod body, and the distance between the two locking parts is equal to the distance between the disassembly holes on the rotating shaft;

[0014] The limiting rod is detachably arranged in the disassembly hole of the rotating shaft.

[0015] In order to better realize the present application, further optimization is made in the above structure. When the hydraulic nut needs to be loosened, the disassembly rod is matched with the disassembly hole on one of the rotating shafts through the two locking parts, the limit rod is inserted into the disassembly hole of the other rotating shaft, and the disassembly rod is rotated so that the rod body in the disassembly rod abuts against the limit rod.

[0016] In order to better realize the present application, further optimization is made in the above structure, and before replacing the shear blade, a shaft protection sleeve is sleeved on the rotating shaft;

[0017] After replacing the cutting blade, remove the shaft protection sleeve on the rotating shaft.

[0018] In order to better realize the present application, further optimization is made in the above structure. When installing the pressure ring, a copper rod is used to knock the part of the pressure ring that is inclined away from the shear blade, so that the axis of the pressure ring coincides with the axis of the rotating shaft.

[0019] In order to better realize the present application, further optimization is made in the above structure, wherein the shear blade comprises an upper shear blade and a lower shear blade; wherein,

[0020] When disassembling the upper shear blade, first loosen the hydraulic nut on the side of the upper shear blade close to the gear box, and then loosen the hydraulic nut on the side of the upper shear blade away from the gear box to complete the loosening of the upper shear blade.

[0021] In order to better implement the present application, further optimization is made in the above structure. After the upper shear blade is replaced, the fixed body in the hydraulic nut on the side of the upper shear blade facing away from the gear box is tightened, and then the locking nut is loosened by 1 / 4 turn, and the pressure bolt is tightened through the perforation on the locking nut.

[0022] In order to better implement the present application, further optimization is made in the above structure. After tightening the hydraulic nut on the side away from the gear box, tighten the fixed body in the hydraulic nut on the side of the upper shear blade close to the gear box, then loosen the locking nut by 1 / 4 turn, and tighten the pressure bolt through the perforation on the locking nut.

[0023] In order to better realize the present application, further optimization is made in the above structure, and after replacing the shear blade, the quality of the small channel is checked; wherein, the small channel is the working gap between the upper shear blade and the lower shear blade.

[0024] In order to better implement the present application, further optimization is made in the above structure, and checking the status of the hydraulic nut includes checking whether the hydraulic nut has oil leakage.

[0025] It can be seen from the above technical solution that the method for replacing the shearing blade of the trimming shears provided in the present application can fix the rotating shaft by disassembling the tool, so that the shearing blade of the trimming shears can be replaced directly on the cold rolling production line, so as to simplify the shearing blade replacement process and shorten the replacement time, so as to adapt to the fast production rhythm of the continuous annealing line, thereby ensuring the production efficiency of the continuous annealing line. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of the side trimming shears when replacing the upper cutting blade in the side trimming shears blade replacement method provided in the present application.

[0027] Figure 2 A schematic diagram of the structure of the side trimmer when replacing the lower cutting blade in the side trimmer blade replacement method provided in the present application.

[0028] Figure 3 This is a schematic structural diagram of a disassembly rod used in the method for replacing the cutting blade of the trimming shears provided in the present application.

[0029] Description of reference numerals:

[0030] 1-gear box, 11-rotating shaft;

[0031] 2-Upper shear blade;

[0032] 3-Lower shear blade;

[0033] 41-hydraulic nut, 42-pressure ring;

[0034] 5-disassembly rod; 51-rod body, 52-locking part;

[0035] 6-Limiting rod. DETAILED DESCRIPTION

[0036] In order to enable technicians in the technical field to which the present application belongs to understand the present application more clearly, the technical solution of the present application is described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0037] In the embodiments of the present application, Figures 1 to 3 As shown, a method for replacing a cutting blade of a trimming shear comprises the following steps:

[0038] Use a disassembly tool to fix the rotating shaft 11 on which the upper shear blade 2 is installed. Figure 1, preventing the rotating shaft 11 from rotating, so as to facilitate the disassembly of the hydraulic nut 41; after the rotating shaft 11 is fixed, use a tool to loosen the hydraulic nut 41 used to fasten the upper shear blade 2; wherein, there are two hydraulic nuts 41 used to fasten the upper shear blade 2, and the two hydraulic nuts 41 are respectively located on the side of the upper shear blade 2 close to the gear box 1 and the side of the upper shear blade 2 away from the gear box 1; during operation, first loosen the hydraulic nut 41 on the side of the upper shear blade 2 close to the gear box 1, and then loosen the hydraulic nut 41 on the side of the upper shear blade 2 away from the gear box 1, so as to complete the loosening of the upper shear blade 2;

[0039] After the hydraulic nut 41 is loosened, the hydraulic nut 41 and the pressure ring 42 used to fasten the upper shear blade 2 are removed in sequence. The hydraulic nut 41 here refers to the hydraulic nut 41 on the side of the upper shear blade 2 away from the gear box 1.

[0040] A shaft protection sleeve is provided on the rotating shaft 11 to prevent the upper shear blade 2 from touching the threads on the rotating shaft 11 and causing deformation of the threads during the disassembly and assembly of the upper shear blade 2;

[0041] Replace the upper shear blade 2, remove the worn upper shear blade 2, and install a new upper shear blade 2 on the rotating shaft 11;

[0042] Check the quality of the small channel to prevent small parts such as bolts from falling between the upper shear blade 2 and the lower shear blade 3; the small channel is the working gap between the upper shear blade 2 and the lower shear blade 3;

[0043] Remove the shaft protection sleeve on the rotating shaft 11, and install the pressure ring 42 and the hydraulic nut 41 for fastening the upper shear blade 2 in sequence; wherein,

[0044] When installing the pressing ring 42, use a copper rod to knock the part of the pressing ring 42 that is inclined away from the upper shear blade 2, so that the axis of the pressing ring 42 coincides with the axis of the rotating shaft 11, so that the side of the pressing ring 42 facing the gear box 1 can fit with the side of the upper shear blade 2 away from the gear box 1;

[0045] When tightening the hydraulic nut 41, first tighten the hydraulic nut 41 on the side of the upper shear blade 2 facing away from the gear box 1, and then tighten the hydraulic nut 41 on the side of the upper shear blade 2 close to the gear box 1. The specific operation method is: tighten the fixed body in the hydraulic nut 41 on the side of the upper shear blade 2 facing away from the gear box 1, then loosen the locking nut by 1 / 4 turn, and tighten the pressure bolt through the perforation on the locking nut; then, tighten the fixed body in the hydraulic nut 41 on the side of the upper shear blade 2 close to the gear box 1, and then loosen the locking nut by 1 / 4 turn, and tighten the pressure bolt through the perforation on the locking nut; it is worth noting that the purpose of loosening the locking nut by 1 / 4 turn is to make the perforation on the locking nut correspond to the position of the pressure bolt, so that the staff can tighten the pressure bolt through the perforation; in the process of tightening the hydraulic nut 41, the rotating shaft 11 is also fixed by the cooperation of the disassembly tool to make the tightening of the hydraulic nut 41 more convenient;

[0046] Check the status of the hydraulic nut 41 to ensure that the hydraulic nut 41 is in a tightened state and there is no oil leakage; if the hydraulic nut 41 leaks oil, the hydraulic nut 41 needs to be replaced in time to avoid the hydraulic nut 41 loosening during the use of the trimming shears, causing the upper shear blade 2 to move, thereby causing the trimming shears to fail to work normally, or causing a safety accident.

[0047] Use a disassembly tool to fix the rotating shaft 11 on which the lower shear blade 3 is installed to prevent the rotating shaft 11 from rotating. Figure 2 , so that the disassembly of the hydraulic nut 41 is more convenient; after the rotating shaft 11 is fixed, use a tool to loosen the hydraulic nut 41 used to tighten the lower shear blade 3;

[0048] After the hydraulic nut 41 is loosened, the hydraulic nut 41 and the pressure ring 42 used to fasten the lower shear blade 3 are removed in sequence;

[0049] A shaft protection sleeve is provided on the rotating shaft 11 to prevent the lower shear blade 3 from touching the threads on the rotating shaft 11 and causing deformation of the threads during the disassembly and assembly of the lower shear blade 3;

[0050] Replace the lower shear blade 3, remove the worn lower shear blade 3, and install a new lower shear blade 3 on the rotating shaft 11;

[0051] Remove the shaft protection sleeve on the rotating shaft 11, and install the pressure ring 42 and the hydraulic nut 41 for fastening the lower shear blade 3 in sequence; wherein,

[0052] When installing the pressing ring 42, use a copper rod to knock the part of the pressing ring 42 that is inclined away from the lower shear blade 3, so that the axis of the pressing ring 42 coincides with the axis of the rotating shaft 11, so that the side of the pressing ring 42 facing the gear box 1 can fit with the side of the lower shear blade 3 away from the gear box 1;

[0053] When tightening the hydraulic nut 41, tighten the fixed body in the hydraulic nut 41, then loosen the locking nut by 1 / 4 turn, and tighten the pressure bolt through the through hole on the locking nut; it is worth noting that the purpose of loosening the locking nut by 1 / 4 turn is to make the through hole on the locking nut correspond to the position of the pressure bolt, so that the staff can tighten the pressure bolt through the through hole;

[0054] Check the status of the hydraulic nut 41 to ensure that the hydraulic nut 41 is in a tightened state and there is no oil leakage. If the hydraulic nut 41 leaks oil, the hydraulic nut 41 needs to be replaced in time to avoid the hydraulic nut 41 loosening during the use of the trimming shears, causing the lower shear blade 3 to be displaced, thereby causing the trimming shears to fail to work normally or causing a safety accident.

[0055] In some embodiments, the disassembly tool includes a disassembly rod 5 and a limiting rod 6; wherein,

[0056] The disassembly lever 5 includes a rod body 51 and two locking portions 52; the length of the disassembly lever 5 is greater than the distance between the two rotating shafts 11; the two locking portions 52 are arranged from the fixed end of the disassembly lever 5 to the movable end of the disassembly lever 5, and the axes of the locking portions 52 are perpendicular to the axes of the rod body 51, and the distance between the two locking portions 52 is equal to the distance between the disassembly holes on the rotating shaft 11, see Figure 3 ;

[0057] The limiting rod 6 is detachably arranged in the disassembly hole of the rotating shaft 11, see Figure 1 .

[0058] In some embodiments, when it is necessary to loosen the hydraulic nut 41 used to fasten the upper shear blade 2, the disassembly rod 5 is matched with the disassembly hole on the rotating shaft 11 for installing the upper shear blade 2 through the two locking parts 52, and the limiting rod 6 is inserted into the disassembly hole of the rotating shaft 11 for installing the lower shear blade 3, and the disassembly rod 5 is rotated so that the rod body 51 in the disassembly rod 5 abuts against the limiting rod 6, see Figure 1 , to limit the rotation of the shaft 11, so that the staff can easily complete the disassembly of the hydraulic nut 41; during installation, the shaft 11 is fixed by the same method, so that the staff can tighten the hydraulic nut 41 on the shaft 11.

[0059] In some embodiments, when it is necessary to loosen the hydraulic nut 41 used to fasten the lower shear blade 3, the disassembly rod 5 is engaged with the disassembly hole on the rotating shaft 11 on which the lower shear blade 3 is installed through the two locking parts 52, and the rotating shaft 11 is rotated so that the end of the disassembly rod 5 away from the rotating shaft 11 is placed on the ground, see Figure 2 , to limit the rotation of the shaft 11, so that the staff can easily complete the disassembly of the hydraulic nut 41; during installation, the shaft 11 is fixed by the same method, so that the staff can tighten the hydraulic nut 41 on the shaft 11.

[0060] The above steps can be simplified into the following process:

[0061] 1. Replace the upper cutting blade 2:

[0062] 1) Loosen the hydraulic nut 41 on the upper shear blade 2 close to the gear box 1;

[0063] 2) Loosen the hydraulic nut 41 on the side of the upper shear blade 2 facing away from the gear box 1;

[0064] 3) Remove the hydraulic nut 41 and the pressure ring 42;

[0065] 4) Install the shaft protection sleeve and replace the upper shear blade 2;

[0066] 4) Check the quality of small channels;

[0067] 5) Install the pressure ring 42 and the hydraulic nut 41;

[0068] 6) Tighten the hydraulic nut 41 on the side of the upper shear blade 2 facing away from the gear box 1, then loosen it by 1 / 4 turn and tighten the hexagonal nut;

[0069] 7) Tighten the hydraulic nut 41 on the upper shear blade 2 close to the gear box 1, then loosen it by 1 / 4 turn and tighten the pressure bolt;

[0070] 8) After the upper shear blade 2 is replaced, check whether the hydraulic nut 41 has oil leakage.

[0071] 2. Replace the lower cutting blade 3:

[0072] 1) Loosen and tighten the hydraulic nut 41 of the lower shear blade 3;

[0073] 2) Remove the pressure ring 42 and the hydraulic nut 41;

[0074] 3) Install the thread and shaft protection sleeve, and replace the lower shear blade 3;

[0075] 4) Install the pressure ring 42 and the hydraulic nut 41;

[0076] 5) Tighten the hydraulic nut 41, then loosen it 1 / 4 turn and tighten the hexagonal nut.

[0077] Through the above embodiments, the present application has the following beneficial effects or advantages:

[0078] 1) The method for replacing the shear blade of the trimming shears can fix the rotating shaft 11 by disassembling the tool, so that the shear blade of the trimming shears can be directly replaced on the cold rolling production line, so as to simplify the shear blade replacement process and shorten the replacement time, so as to adapt to the fast production rhythm of the continuous annealing line, thereby ensuring the production efficiency of the continuous annealing line.

[0079] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0080] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for replacing a cutting blade of a trimming shear, characterized in that: The method comprises the following steps: Use a disassembly tool to fix the rotating shaft (11) and loosen the hydraulic nut (41) used to tighten the shear blade; Sequentially remove the hydraulic nut (41) and the pressure ring (42) used to fasten the shear blade; Replace the shear blades; Installing a pressure ring (42) and a hydraulic nut (41) for fastening the shear blade in sequence; Check the condition of the hydraulic nut (41).

2. The method for replacing the cutting blade of the trimming shears according to claim 1, characterized in that: The disassembly tool comprises a disassembly rod (5) and a limiting rod (6); The disassembly rod (5) comprises a rod body (51) and two locking parts (52); the length of the disassembly rod (5) is greater than the distance between the two rotating shafts (11); the two locking parts (52) are arranged in an array from the fixed end of the disassembly rod (5) to the movable end of the disassembly rod (5), and the axes of the locking parts (52) are perpendicular to the axes of the rod body (51), and the distance between the two locking parts (52) is equal to the distance between the disassembly holes on the rotating shaft (11); The limiting rod (6) is detachably arranged in a disassembly hole of the rotating shaft (11).

3. The method for replacing the cutting blade of the trimming shears according to claim 2, characterized in that: When the hydraulic nut (41) needs to be loosened, the disassembly rod (5) is engaged with the disassembly hole on one of the rotating shafts (11) through the two locking parts (52), the limiting rod (6) is inserted into the disassembly hole of the other rotating shaft (11), and the disassembly rod (5) is rotated so that the rod body (51) in the disassembly rod (5) abuts against the limiting rod (6).

4. The method for replacing the cutting blade of the trimming shears according to claim 1, characterized in that: Before replacing the shear blade, a shaft protection sleeve is sleeved on the rotating shaft (11); After replacing the cutting blade, the shaft protection sleeve on the rotating shaft (11) is removed.

5. The method for replacing the cutting blade of the trimming shears according to claim 1, characterized in that: When installing the pressing ring (42), a copper rod is used to strike the portion of the pressing ring (42) that is inclined away from the shear blade, so that the axis of the pressing ring (42) coincides with the axis of the rotating shaft (11).

6. The method for replacing a trimming shear blade according to any one of claims 1 to 5, characterized in that: The shear blade comprises an upper shear blade (2) and a lower shear blade (3); wherein: When disassembling the upper shear blade (2), first loosen the hydraulic nut (41) on the side of the upper shear blade (2) close to the gear box (1), and then loosen the hydraulic nut (41) on the side of the upper shear blade (2) away from the gear box (1), thereby completing the loosening of the upper shear blade (2).

7. The method for replacing the cutting blade of the trimming shears according to claim 6, characterized in that: After the upper shear blade (2) is replaced, the fixing body in the hydraulic nut (41) on the side of the upper shear blade (2) facing away from the gear box (1) is tightened, and then the locking nut is loosened by 1 / 4 turn, and the pressure bolt is tightened through the through hole on the locking nut.

8. The method for replacing the cutting blade of the trimming shears according to claim 7, characterized in that: After the hydraulic nut (41) on the side facing away from the gear box (1) is tightened, the fixing body in the hydraulic nut (41) on the side of the upper shear blade (2) close to the gear box (1) is tightened, and then the locking nut is loosened by 1 / 4 turn, and the pressure bolt is tightened through the through hole on the locking nut.

9. The method for replacing the cutting blade of the trimming shears according to claim 6, characterized in that: After replacing the shear blade, check the quality of the small channel; wherein the small channel is the working gap between the upper shear blade (2) and the lower shear blade (3).

10. The method for replacing the cutting blade of the trimming shears according to claim 1, characterized in that: Checking the state of the hydraulic nut (41) includes checking whether the hydraulic nut (41) has oil leakage.

Images