Multi-point automatic pressing device for slider and slide of large shearing machine and use method thereof

Abstract

The application discloses a kind of large-scale shearing machine sliding block and slide's multi-point automatic pressing device, including base and multiple sets of pressing mechanism arranged thereon;Each set of the pressing mechanism includes column, crosspiece and top cylinder;The column has two and is symmetrically arranged, the lower end of the column is arranged on the base, and the two ends of the crosspiece are respectively connected with the upper end of the two columns;The top cylinder has two, respectively arranged at the two end positions of the crosspiece and moves up and down along the corresponding position of the column;The multi-point automatic pressing device further includes an electrically-controlled hydraulic mechanism for controlling the action of the top cylinder.The application also discloses a use method of the multi-point automatic pressing device based on large-scale shearing machine sliding block and slide.The application realizes the close fit of sliding block and slide without gap, to solve the defects of prior art.

Description

Technical Field

[0001] This invention relates to shearing equipment, and more specifically, to a multi-point automatic clamping device for a large shearing machine slider and slide block, and its method of use. Background Technology

[0002] The shearing machines in the scrap areas of existing steel plants primarily cut various large and irregularly shaped scrap steel into smaller pieces to meet the needs of Baosteel's steelmaking plant for regular scrap addition. Because the types and thicknesses of scrap steel vary, the shearing machines must have sufficient shearing force to effectively cut different types of scrap steel. For example... Figure 1 As shown, after the scrap steel is grabbed into the shearing machine's hopper, it is pushed to the feed inlet 1 by the push cylinder. The compactor compacts the scrap steel, and the slide 2 falls down under the drive of the hydraulic cylinder 3. Under the combined force of the upper and lower blades 4, the large scrap steel is sheared into smaller pieces.

[0003] Combination Figure 2 and Figure 3 As shown, the hydraulic cylinder 3 of the shearing machine can provide 1630 tons of pressure, thus applying significant pressure to the scrap steel, which is then sheared by the upper and lower blades 4. During the up-and-down movement of the slider 5, the slide block 2 maintains its verticality. High-polymer wear-resistant linings (including a high-polymer wear-resistant liner 6 for the slide block and a high-polymer wear-resistant liner 7 for the slider) are installed between the slider 5 and the slide block 2 to reduce mutual wear between them. After the shearing machine has been operating for a period of time, the wear-resistant linings between the slider 5 and the slide block 2 will wear down, causing the angle of the slider 5 to deviate. This results in a larger gap between the upper and lower blades 4, making it impossible to effectively shear the scrap steel. It is necessary to remove the slider 5 and the slide block 2 and replace the wear-resistant linings between them.

[0004] Because the newly replaced polymer wear-resistant liner has gaps in its fit, a tight fit between slider 5 and slide block 2 cannot be achieved. To address this problem, many solutions have been explored on-site. To achieve a tight fit, slider 5 needs to be fixed in place, and sufficient pressure applied to slide block 2 to eliminate the gaps. However, slider 5 and slide block 2 are heavy and large, with a length of 3.15 meters, making on-site operation extremely difficult. Often, the slider assembly is placed next to a concrete pillar, and a 20-ton jack is used to press down slide block 2. Moving and operating the jack is extremely inconvenient, and slider 5 frequently moves, damaging the concrete pillar. This problem has been a persistent issue on-site, and disassembling and repairing the shearing machine slider assembly has remained an unresolved problem without a good solution.

[0005] In summary, due to the unique structure and performance of shearing machines, there are currently no dedicated devices or equipment on the market for the maintenance and repair of the shearing machine slide assembly. The current method of using a clamping block 2 on-site is unscientific, requiring multiple people (generally more than 12) and various trades (mechanical, electrical, hoisting) to work together, and it is difficult to effectively clamp the two together. Even if they are clamped and connected by the connecting iron block 8, if the total width of the slide assembly is greater than or equal to the width of the shearing machine support, it is necessary to continue disassembling and reassembling to clamp the slide block 2 again. As an important scrap steel shearing device, the shearing machine has a high utilization rate and large workload, which cannot meet the requirements of steelmaking for the large-scale use of scrap steel.

[0006] The current on-site slide block assembly maintenance technology results in prolonged downtime, which significantly impacts production. Frequent and high-load maintenance further increases the maintenance burden. Existing technology can no longer meet the needs of efficient production operations and has also had a significant impact on the current high-efficiency and low-carbon steelmaking process. In summary, due to the defects and deficiencies of existing technologies, it is no longer possible to meet the requirements for quick installation of the slide block assembly after replacing the wear-resistant liner. Summary of the Invention

[0007] In view of the above-mentioned defects in the prior art, the purpose of this invention is to provide a multi-point automatic clamping device for the slider and slide block of a large shearing machine and its usage method, so as to achieve a tight fit between the slider and slide block without gaps, thereby solving the defects of the prior art.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] On the one hand, a multi-point automatic clamping device for a large shearing machine slider and slide block includes a base and multiple clamping mechanisms mounted thereon;

[0010] Each of the aforementioned clamping mechanisms includes a column, a crossbar, and a top cylinder;

[0011] The column has two symmetrically arranged columns, the lower end of the column is located on the base, and the two ends of the crossbar are respectively connected to the upper ends of the two columns.

[0012] The top cylinder has two units, which are respectively located at both ends of the crossbar and move up and down along the corresponding column.

[0013] The multi-point automatic clamping device also includes an electro-hydraulic mechanism for controlling the movement of the top cylinder.

[0014] Preferably, the base is also provided with a pad for placing the slide assembly.

[0015] Preferably, the lower end of the column is connected to the base, and both ends of the crossbar are connected to the upper end of the column by bolts.

[0016] Preferably, the top of the top cylinder is mounted on the crossbar via a lifting rod, and the back of the top cylinder moves up and down along the column.

[0017] Preferably, the upper end of the lifting rod is fixed to the crossbar by a nut, and the lower end of the lifting rod is connected to the top cylinder by a ball joint.

[0018] Preferably, the column is provided with a sliding groove for the top cylinder to move.

[0019] Preferably, the clamping mechanism has 3 sets.

[0020] Preferably, the electro-hydraulic mechanism includes a hydraulic pump;

[0021] The hydraulic pump is connected to the top cylinder via a two-position two-way valve;

[0022] The hydraulic pump is controlled to start and stop by the main power switch;

[0023] The main power switch controls the opening and closing of the top cylinder.

[0024] Preferably, the hydraulic pump is equipped with an unloading valve;

[0025] The main power switch is equipped with a fuse;

[0026] The top cylinder is equipped with a pressure gauge.

[0027] On the other hand, a method of using the multi-point automatic clamping device based on the large shearing machine slider and slide block includes the following steps:

[0028] S1. Place the slide assembly on the base;

[0029] S2. Install the column of the clamping mechanism on the base;

[0030] S3. Connect the crossbar to the corresponding two columns.

[0031] S4. Install the lifting rod and the top cylinder on the crossbar;

[0032] S5. Check the installation effect. If there are any problems, return to step S2 to check the problems. If it is normal, proceed to step S6.

[0033] S6. Oil pipe connecting the top cylinder;

[0034] S7. Adjust the height of the top cylinder;

[0035] S8. Check whether the performance of the multi-point automatic pressing device is good. If there is a problem, return to step S6 to check the problem. If it is good, proceed to step S9.

[0036] S9. Press the main power switch and operate the switch;

[0037] S10, The top cylinder contacts the slide block on the slide block assembly;

[0038] S11. Cut off the connecting iron block on the slide assembly;

[0039] S12. Press the first switch to activate the top cylinder. When the pressure gauge reading is less than 5T and the gap between the upper slider and the slide block of the slide block assembly is 3-6mm, the top cylinder operation is stopped.

[0040] S13. Following step S12, press the remaining switches and operate the remaining corresponding top cylinder actions;

[0041] S14. When the gap between the upper slider and the slide block of the slide block assembly is 3-6mm, stop all the top cylinder actions;

[0042] S15. Determine and check whether the clearance on the slide assembly meets the requirements. If not, return to step S12. If yes, proceed to step S16.

[0043] S16. Press the first switch to activate the top cylinder. When the pressure gauge reading is less than 8T and the gap between the upper slider and the slide block of the slide block assembly is less than 0.5mm, the top cylinder operation is stopped.

[0044] S17. Following step S16, press the remaining switches and operate the remaining corresponding top cylinder actions;

[0045] S18. When the gap between the upper slider and the slide block of the slide block assembly is less than 0.5mm, stop all the top cylinder actions;

[0046] S19. Determine and check whether the clearance on the slide assembly meets the requirements. If not, return to step S1. If yes, proceed to step S20.

[0047] S20. Weld the connecting iron block on the slide assembly;

[0048] S21. Unscrew the unloading valve;

[0049] S22. Remove the multi-point automatic clamping device;

[0050] S23. The slide assembly is installed on the machine.

[0051] The present invention provides a multi-point automatic clamping device for the slider and slide block of a large shearing machine and its usage method, which solves the problem that the slider assembly cannot be reset or installed after disassembly. In response to the situation where there is a gap or excessive width between the two after the replacement of the polymer wear-resistant liner, the appropriate hydraulic pressure is applied to the slide block by the top cylinder at 6 points, which can eliminate the gap between the slider and the slide block. By displaying the pressure gauge value and measuring the gap value, the maintenance operation method can be scientifically standardized, eliminating the need for multiple people to cooperate and greatly reducing the maintenance workload. The installation requirements of the slider assembly can be met in one maintenance.

[0052] After the multi-point automatic clamping device of this invention was used, the repair time of the shearing machine slider assembly was greatly reduced, and the working time of the shearing machine was improved. According to on-site statistics, the repair time of each slider assembly was shortened from 12 days to 2 days, and the working time was correspondingly increased by 10 days. It played a positive role in the shearing of various types of scrap steel, reduced the inventory of scrap steel, accelerated the turnover and utilization rate of scrap steel, and ensured the normal supply of scrap steel in front of the steelmaking furnace. Attached Figure Description

[0053] Figure 1 This is a schematic diagram of an existing shearing machine, where (a) is a schematic diagram of the slider in the upper position and (b) is a schematic diagram of the slider in the middle position.

[0054] Figure 2 This is a schematic diagram of an existing slider assembly;

[0055] Figure 3 This is a schematic diagram of disassembling and inspecting an existing slider assembly, where (a) is a diagram after disassembly and (b) is a diagram after clamping.

[0056] Figure 4 This is a schematic diagram of the multi-point automatic pressing device of the present invention;

[0057] Figure 5 yes Figure 4 A side view diagram;

[0058] Figure 6 This is a schematic diagram of the electro-hydraulic mechanism in the multi-point automatic pressing device of the present invention;

[0059] Figure 7 This is a schematic diagram of the slide assembly placed on the multi-point automatic clamping device of the present invention;

[0060] Figure 8 This is a schematic diagram showing the removal of the connecting iron block on the slide assembly;

[0061] Figure 9 This is a schematic diagram of the multi-point automatic clamping device of the present invention, which is used to clamp the slide assembly.

[0062] Figure 10This is a schematic diagram of the slide assembly after installation;

[0063] Figure 11 This is a flowchart illustrating the method of using the present invention. Detailed Implementation

[0064] To better understand the above-mentioned technical solutions of the present invention, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0065] Combination Figure 4 and Figure 5 As shown, the present invention provides a multi-point automatic clamping device for a large shearing machine slider and slide block, including a base 20 and three clamping mechanisms disposed thereon.

[0066] The base 20 is made of 20mm thick iron plate.

[0067] Each clamping mechanism includes a column 21, a crossbar 28, and a top cylinder 24, with the top cylinder 24 being a 20T top cylinder.

[0068] The column 21 has two columns arranged symmetrically. The lower end of the column 21 is installed on the base 20 by fixing bolts 22. The two ends of the crossbar 28 are connected to the upper ends of the two columns 21 by connecting bolts 31, forming a gate-shaped structure.

[0069] There are two top cylinders 24, which are respectively located at both ends of the crossbar 28 and move up and down along the corresponding column 21.

[0070] The multi-point automatic clamping device also includes an electro-hydraulic mechanism for controlling the movement of the top cylinder 24.

[0071] The base 20 is also provided with a pad 23 for placing the slide assembly 100, and the pad 23 is located inside the U-shaped structure.

[0072] The top of the top cylinder 24 is mounted on the crossbar via the lifting rod 30, and the back of the top cylinder 24 moves up and down along the column 21.

[0073] The upper end of the lifting rod 30 is fixed to the crossbar 28 by a nut 29, and the lower end of the lifting rod 30 is connected to the top cylinder 24 by a ball head 27.

[0074] The column 21 is fitted with a sliding groove 25 for the top cylinder 24 to move via fixing bolts.

[0075] Combination Figure 6 As shown, the electro-hydraulic mechanism includes a hydraulic pump 43, which is connected to six top cylinders 24 via two-position two-way valves 64 and 45.

[0076] The hydraulic pump 43 is controlled by the main power switch K, which in turn controls the opening and closing of the six corresponding top cylinders 24 through six switches K1, K2, K3, K4, K5, and K6.

[0077] The hydraulic pump 43 is equipped with an unloading valve 44, the main power switch K is equipped with a fuse 42, and each of the six top cylinders 24 is equipped with pressure gauges 53, 55, 57, 59, 61, and 63.

[0078] The column 21 and crossbar 28 of the multi-point automatic clamping device of the present invention are connected as a whole by bolts. The top cylinder 24 and related accessories are installed. After installation, the position of the multi-point automatic clamping device and the slide assembly 100 is confirmed, ensuring that the slide assembly 100 is in the middle position of the multi-point automatic clamping device. By adjusting the lifting rod 30, the top cylinder 24 is moved up and down, so that the top cylinder 24 is in the middle position of the slide in the assembly 100. Figure 7 As shown.

[0079] The operator operates the electro-hydraulic mechanism to extend all six top cylinders 24, ensuring they are in contact with the slide assembly 100. After confirming this, the main power switch K of the electro-hydraulic mechanism is turned off. Maintenance personnel then use an air gun to sequentially cut off the connecting iron blocks 103 between the slider 101 and the slide 102 on the slide assembly 100, separating the slider 101 from the slide 102. This prepares for the next step of tightening the slide 102. Figure 8 As shown.

[0080] The operator starts the electro-hydraulic mechanism and operates the switches K1, K2, K3, K4, K5, and K6 of the six top cylinders 24 one by one. After the six top cylinders 24 are pressed tightly against the slide block 102, the gap between the slider 101 and the slide block 102 is checked. Based on the readings of pressure gauges 53, 55, 57, 59, 61, and 63, a specific top cylinder 24 is operated individually to ensure that the gap between the slider 101 and the slide block 102 is consistent before and after, thus avoiding damage to the wear-resistant liner. The width of the slider assembly 100 at the front, middle, and rear positions is measured. It must be less than 5mm of the total width L of the slider assembly 100 to meet the installation requirements of the slider assembly 100. Figure 9 As shown.

[0081] After the maintenance personnel confirmed that the dimensions were correct, they welded six connecting iron blocks 103 to weld the slider 101 and the slide block 102 together. They then turned off the main power switch K, opened the unloading valve 44 to stop the top cylinder 24 from applying hydraulic pressure to the slide block 102, and measured the dimensions of the slider assembly 100 at the front, middle, and rear positions again. After confirming that the dimensions were correct, they removed the multi-point automatic clamping device of this invention. Figure 10 As shown, the slider assembly 100 is now fully assembled and ready for use.

[0082] Combination Figure 11As shown, the present invention also discloses a method for using a multi-point automatic clamping device based on a large shearing machine slider and slide block, comprising the following steps:

[0083] S1. Place the slide assembly 100 on the pad 23 of the base 20;

[0084] S2. Install the column 21 of the clamping mechanism on the base 20;

[0085] S3. Connect the crossbar 28 to the corresponding two uprights 21;

[0086] S4. Install the lifting rod 30 and the top cylinder 24 on the crossbar 28;

[0087] S5. Check the installation effect. If there are any problems, return to step S2 to check the problems. If it is normal, proceed to step S6.

[0088] S6, Oil pipe connecting to top cylinder 24;

[0089] S7. Adjust the height of top cylinder 24;

[0090] S8. Check if the multi-point automatic clamping device is functioning properly. If there is a problem, return to step S6 to check for the problem. If it is functioning properly, proceed to step S9.

[0091] S9. Press the main power switch K, and operate switches K1, K2, K3, K4, K5, and K6;

[0092] S10, the top cylinder 24 contacts the slide 102 on the slide assembly 100;

[0093] S11. Cut off the connecting iron block 103 on the slide assembly 100;

[0094] S12. Press switch K1 to activate the corresponding top cylinder 24. When the reading of the corresponding pressure gauge 63 is less than 5T and the gap between the slider 101 and the slide 102 on the slide assembly 100 is 3-6mm, the top cylinder 24 stops activating.

[0095] S13. Following step S12, press the remaining switches K2, K3, K4, K5, and K6 to operate the remaining corresponding top cylinder 24 actions;

[0096] S14. When the gap between the upper slider 101 and the upper slider 102 of the upper slider assembly 100 is 3-6mm, stop the operation of all top cylinders 24.

[0097] S15. Determine and check whether the clearance on the slide assembly 100 meets the requirements (3-6mm). If not, return to step S12. If yes, proceed to step S16.

[0098] S16. Press switch K1 again to activate the corresponding top cylinder 24. When the reading of the corresponding pressure gauge 63 is less than 8T and the gap between the slider 101 and the slide 102 on the slide assembly 100 is less than 0.5mm, the top cylinder 24 will stop operating.

[0099] S17. Following step S16, press the remaining switches K2, K3, K4, K5, and K6 to operate the remaining corresponding top cylinder 24 actions.

[0100] S18. When the gap between the slider 101 and the slide 102 on the slide assembly 100 is less than 0.5mm, stop the action of all top cylinders 24.

[0101] S19. Determine and check whether the clearance on the slide assembly 100 meets the requirements (less than 0.5mm). If not, return to step S1. If yes, proceed to step S20.

[0102] S20, Connecting iron block 103 on welding slide assembly 100;

[0103] S21. Unscrew the unloading valve 44;

[0104] S22. Remove the multi-point automatic clamping device;

[0105] S23, slide assembly 100 is installed on the machine.

[0106] The specific process is as follows:

[0107] Place the removed slider assembly 100 horizontally on the pad 23 of the base 20, so that the slider assembly 100 is in the center position of the multi-point automatic clamping device. After confirming that there is no problem, install six columns 21, install three crossbars 28, and then install six top cylinders 24 and lifting rods 30 in sequence. After the three sets of clamping mechanisms are installed, confirm that the top cylinders 24 can slide up and down normally. After confirmation, connect the electro-hydraulic mechanism and turn on the main power switch K to test the action performance of the top cylinders 24.

[0108] Press switches K1, K2, K3, K4, K5, and K6 on the top cylinder 24. The piston of the top cylinder 24 extends and contacts the slide block 102. After confirming that the engagement is effective, turn off the main power switch K. Cut off the connecting iron block 103 between the slider 101 and the slide block 102. After confirming that the cutting is complete, turn on the main power switch K. Press switch K1 on the top cylinder 24. Check that the pressure gauge 63 reading is less than 5T. If the gap between the slider 101 and the slide block 102 is 3-6mm, then disconnect switch K1. Repeat this operation to continue operating switches K3 and K2. After one side of the slide block 102 is in position, continue operating switches K4, K6, and K5 to make the gap between the slider 101 and the slide block 102 on the other side 3-6mm. Then disconnect the corresponding switches K1, K2, K3, K4, K5, and K6.

[0109] Continue operating switch K1 to increase the hydraulic pressure of the top cylinder 24 on the slide 103. Check that the pressure gauge reading is less than 8T, and the gap between the slider 101 and the slide 102 is 0.5mm. Then disconnect switch K1. Repeat this process with switches K3 and K2. Once one side of the slide 102 is in position, continue operating switches K4, K6, and K5 to ensure the gap between the slider 101 and the slide 102 on the other side is 0.5mm. Then disconnect the main power switch K.

[0110] Confirm that the gap between slider 101 and slide block 102 is 0.5mm. Weld six connecting iron blocks 103 to connect slider 101 and slide block 102 into one unit. After welding, confirm that it is firm. Then, release the unloading valves 44 of the top cylinder 24 one by one. The top cylinder 24 no longer applies hydraulic pressure to the slide block 102. Check the gap between slider 101 and slide block 102. Measure the width L1 of slider assembly 100 and confirm that L1 is less than L by 5mm. The dimensions of the installed slider assembly 100 meet the installation requirements. Remove all connecting parts of the multi-point automatic clamping device and use a crane to lift the slider assembly 100 for installation.

[0111] In summary, this invention eliminates the situation where gaps exist between the replacement of the new wear-resistant liner, preventing the slide assembly from being installed on the machine. After placing the slide assembly horizontally and completing the wear-resistant liner replacement, first connect the slider to the slide as a single unit, then install the multi-point automatic clamping device. Operation can then commence, and two people can complete the entire clamping operation. The process consists of two steps: pre-clamping and clamping. Operators check the clamping condition at each point on-site and adjust the clamping pressure according to the pressure gauge readings, thereby achieving rapid clamping of the repaired slide assembly to meet the external dimensional requirements for installation on the machine.

[0112] This device fundamentally changes the situation where the width of the slide block assembly cannot be restored after replacing the wear-resistant liner, and eliminates the safety hazards associated with frequent disassembly and assembly of the slide block. Maintenance efficiency is greatly improved, and the operating efficiency of the shearing machine is significantly enhanced. Although Baosteel's Transportation Department uses a large-scale scrap steel shearing machine, other large steel mills also use similar equipment and require disassembly and maintenance of the slide block assembly. With appropriate modifications to this device, it can better meet the usage requirements of different types of slide block assemblies. Given the increasing input of scrap steel and reduced carbon emissions in major steel mills, scrap steel shearing machines will play a positive role in improving scrap steel shearing efficiency, meeting scrap steel supply needs for steelmaking, and reducing carbon emissions. Therefore, this device and its related technologies have broad prospects for widespread application.

[0113] Those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Any variations or modifications to the above embodiments that are within the spirit and essence of the present invention will fall within the scope of the claims of the present invention.

Claims

1. A method for using a multi-point automatic clamping device based on a large shearing machine slider and slide block, characterized in that: The multi-point automatic clamping device for the slider and slide block of the large shearing machine includes a base and multiple clamping mechanisms mounted thereon. Each of the aforementioned clamping mechanisms includes a column, a crossbar, and a top cylinder, with the top of the top cylinder mounted on the crossbar via a lifting rod; The column has two symmetrically arranged columns, the lower end of the column is located on the base, and the two ends of the crossbar are respectively connected to the upper ends of the two columns. The top cylinder has two units, which are respectively located at both ends of the crossbar and move up and down along the corresponding column. The top cylinder is equipped with a pressure gauge. The multi-point automatic clamping device also includes an electro-hydraulic mechanism for controlling the movement of the top cylinder. The electro-hydraulic mechanism includes a hydraulic pump, which is controlled by a main power switch. The main power switch controls the opening and closing of the top cylinder via a switch. The hydraulic pump is equipped with an unloading valve. The method of use includes the following steps: S1. Place the slide assembly on the base; S2. Install the column of the clamping mechanism on the base; S3. Connect the crossbar to the corresponding two columns. S4. Install the lifting rod and the top cylinder on the crossbar; S5. Check the installation effect. If there are any problems, return to step S2 to check the problems. If it is normal, proceed to step S6. S6. Oil pipe connecting the top cylinder; S7. Adjust the height of the top cylinder; S8. Check whether the performance of the multi-point automatic pressing device is good. If there is a problem, return to step S6 to check the problem. If it is good, proceed to step S9. S9. Press the main power switch and operate the switch; S10, The top cylinder contacts the slide block on the slide block assembly; S11. Cut off the connecting iron block on the slide assembly; S12. Press the first switch to activate the top cylinder. When the pressure gauge reading is less than 5T and the gap between the upper slider and the slide block of the slide block assembly is 3-6mm, the top cylinder operation is stopped. S13. Following step S12, press the remaining switches and operate the remaining corresponding top cylinder actions; S14. When the gap between the upper slider and the slide block of the slide block assembly is 3-6mm, stop all the top cylinder actions; S15. Determine and check whether the clearance on the slide assembly meets the requirements. If not, return to step S12. If yes, proceed to step S16. S16. Press the first switch to activate the top cylinder. When the pressure gauge reading is less than 8T and the gap between the upper slider and the slide block of the slide block assembly is less than 0.5mm, the top cylinder operation is stopped. S17. Following step S16, press the remaining switches and operate the remaining corresponding top cylinder actions; S18. When the gap between the upper slider and the slide block of the slide block assembly is less than 0.5mm, stop all the top cylinder actions; S19. Determine and check whether the clearance on the slide assembly meets the requirements. If not, return to step S1. If yes, proceed to step S20. S20. Weld the connecting iron block on the slide assembly; S21. Unscrew the unloading valve; S22. Remove the multi-point automatic clamping device; S23. The slide assembly is installed on the machine.

2. The method of use according to claim 1, characterized in that: The base is also provided with pads for placing the slide assembly.

3. The method of use according to claim 1, characterized in that: The lower end of the column is connected to the base, and both ends of the crossbar are connected to the upper end of the column by bolts.

4. The method of use according to claim 1, characterized in that: The back of the top cylinder moves up and down along the column.

5. The method of use according to claim 4, characterized in that: The upper end of the lifting rod is fixed to the crossbar by a nut, and the lower end of the lifting rod is connected to the top cylinder by a ball joint.

6. The method of use according to claim 4, characterized in that: The column is provided with a sliding groove for the top cylinder to move.

7. The method of use according to claim 1, characterized in that: The clamping mechanism has 3 sets.

8. The method of use according to claim 1, characterized in that: The hydraulic pump is connected to the top cylinder via a two-position two-way valve.

9. The method of use according to claim 8, characterized in that: The main power switch is equipped with a fuse.

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