Shearing control method and device, hydraulic driving device and gantry shearing machine

Abstract

The application provides a shearing control method and device, a hydraulic driving device and a gantry shearing machine, and relates to the technical field of shearing machines. The method comprises detecting the load of the gantry shearing machine during shearing; automatically adjusting the driving gear of the driving source according to the load, so that the driving gear of the driving source matches the size of the load; wherein the driving source has at least two driving gears, and different driving gears correspond to different driving force peaks of different sizes, and the greater the load, the greater the driving force peak of the matched driving gear. The application provides a shearing control method that can automatically match different loads. According to the size of the load, the maximum shearing force size can be automatically switched and adjusted through the hydraulic oil circuit, so that the maximum shearing force output by the gantry shearing machine is divided into multiple driving gears to match different loads, so as to balance the driving efficiency and driving force peak of the hydraulic cylinder, and achieve faster working efficiency under the condition that the driving force is sufficient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shearing machines, in particular to a shearing control method and device, a hydraulic driving device and a gantry shearing machine. BACKGROUND

[0002] Shearing machines are suitable for metal recycling processing plants, scrap car disassembly sites, smelting and casting industries, and can cut and press the edges of various shaped steel and various metal materials, as well as powder products, plastics, glass steel, insulating materials and rubber. For example, the shearing machine disclosed in Chinese patent CN202110108883.8.

[0003] In the prior art, during the no-load process of the shearing moving knife head of the gantry shear before contacting the material, the hydraulic cylinder driving the shearing moving knife head adopts differential driving to increase the speed, thereby reducing the time occupied by the no-load process. For example, the new hydraulic transmission system of the hydraulic shear disclosed in Chinese patent 201420202186.4, in which the left cylinder and the right cylinder of the hydraulic shear are supplied with oil to form a differential, so that the cylinder is quickly extended to improve work efficiency. However, when the object to be cut or removed is contacted, all the oil pressure is applied to the cylinder rod cavity to obtain increased shearing force.

[0004] Therefore, in the existing gantry shear, the number of oil cylinders and the working area of the oil cylinders for outputting shearing force are constant regardless of the load size. In many medium and small load conditions, the number of oil cylinders participating in shearing is too large, and the working area of the oil cylinders is too large. Under the supply of a certain pump station flow, the action speed of the oil cylinder is very slow, which affects the work efficiency of the gantry shear. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a shearing control method and device, a hydraulic driving device and a gantry shearing machine to solve the above problems in the prior art.

[0006] A shearing control method is applied to a gantry shearing machine, which includes a moving knife holder, a fixed knife holder and a driving source for driving the moving knife holder, and the moving knife holder can be combined with the fixed knife holder to shear materials under the driving of the driving source. The shearing control method comprises:

[0007] Detecting the load of the gantry shearing machine during shearing;

[0008] Adjusting the driving gear of the driving source according to the load, so that the driving gear of the driving source matches the size of the load; wherein the driving source has at least two driving gears, and different driving gears correspond to different driving force peaks of different sizes, and the greater the load, the greater the driving force peak of the driving gear matched therewith.

[0009] In an improved technical solution, the driving source is composed of multiple hydraulic cylinders.

[0010] The adjustment of the driving gear of the driving source is specifically: changing the working mode of one or more hydraulic cylinders to realize the adjustment of the driving gear; at least one hydraulic cylinder has two or three working modes of normal mode, differential mode and follow-up mode, wherein the normal mode is a stretching driving mode in which the rodless cavity of the hydraulic cylinder is filled with oil and the rod cavity is returned with oil; in the differential mode, the oil in the rod cavity of the hydraulic cylinder is returned to the rodless cavity through a differential circuit based on the normal mode; in the follow-up mode, the piston rod of the hydraulic cylinder follows the free stretching of the tool holder.

[0011] In an improved technical solution, the driving source is sequentially provided with driving gears D1, …, driving gear Dn in order of increasing peak driving force, and is sequentially provided with threshold values V1, …, threshold value Vn-1 in order of increasing load, n≥2. n n-1

[0012] The adjustment of the driving gear of the driving source according to the load comprises:

[0013] In response to the load increasing to the threshold value V i , the driving source is adjusted from the driving gear D i to the driving gear D i+1 ; wherein the value of i ranges from an integer in 1 to n-1.

[0014] In an improved technical solution, the adjustment of the driving gear of the driving source according to the load further comprises:

[0015] In response to the load decreasing to the threshold value V i , the driving source is adjusted from the driving gear D i+1 to the driving gear D i ; wherein the value of i ranges from an integer in 1 to n-1.

[0016] In an improved technical solution, the driving source is composed of three hydraulic cylinders.

[0017] The driving gears of the driving source are specifically set as:

[0018] Driving gear D1: one of the hydraulic cylinders is in differential mode, and the other two hydraulic cylinders are in follow-up mode.

[0019] Driving gear D2: one of the hydraulic cylinders is in normal mode, and the other two hydraulic cylinders are in follow-up mode.

[0020] Driving gear D3: all the three hydraulic cylinders are in differential mode. ​​

[0021] Drive gear D4: one of the hydraulic cylinders is in normal mode, two of the hydraulic cylinders are in differential mode; or, two of the hydraulic cylinders are in normal mode, one of the hydraulic cylinders is in follow-up mode;

[0022] Drive gear D5: one of the hydraulic cylinders is in differential mode, two of the hydraulic cylinders are in normal mode;

[0023] Drive gear D6: all of the hydraulic cylinders are in normal mode;

[0024] The drive gear of the drive source is adjusted according to the load, comprising:

[0025] In response to the load increasing to threshold value V1, the drive source is adjusted from drive gear D1 to drive gear D2;

[0026] In response to the load increasing to threshold value V2, the drive source is adjusted from drive gear D2 to drive gear D3;

[0027] In response to the load increasing to threshold value V3, the drive source is adjusted from drive gear D3 to drive gear D4;

[0028] In response to the load increasing to threshold value V4, the drive source is adjusted from drive gear D4 to drive gear D5;

[0029] In response to the load increasing to threshold value V5, the drive source is adjusted from drive gear D5 to drive gear D6;

[0030] The drive gear of the drive source is adjusted according to the load, further comprising:

[0031] In response to the load decreasing to threshold value V5, the drive source is adjusted from drive gear D6 to drive gear D5;

[0032] In response to the load decreasing to threshold value V4, the drive source is adjusted from drive gear D5 to drive gear D4;

[0033] In response to the load decreasing to threshold value V3, the drive source is adjusted from drive gear D4 to drive gear D3;

[0034] In response to the load decreasing to threshold value V2, the drive source is adjusted from drive gear D3 to drive gear D2;

[0035] In response to the load decreasing to threshold value V1, the drive source is adjusted from drive gear D2 to drive gear D1.

[0036] In an improved technical solution, the drive source is composed of two hydraulic cylinders;

[0037] The drive gears of the drive source are specifically set as:

[0038] Drive gear D1: both hydraulic cylinders are in differential mode;

[0039] Drive gear D2: one of the hydraulic cylinders is in normal mode, and one of the hydraulic cylinders is in differential mode;

[0040] Drive gear D3: both hydraulic cylinders are in normal mode;

[0041] The drive gear of the driving source is adjusted according to the load, comprising:

[0042] In response to the load increasing to threshold V1, the driving source is adjusted from drive gear D1 to drive gear D2;

[0043] In response to the load increasing to threshold V2, the driving source is adjusted from drive gear D2 to drive gear D3;

[0044] The drive gear of the driving source is adjusted according to the load, further comprising:

[0045] In response to the load decreasing to threshold V2, the driving source is adjusted from drive gear D3 to drive gear D2;

[0046] In response to the load decreasing to threshold V1, the driving source is adjusted from drive gear D2 to drive gear D1.

[0047] In an improved technical solution, the driving source is composed of two hydraulic cylinders;

[0048] The drive gears of the driving source are specifically set as:

[0049] Drive gear D1: one of the hydraulic cylinders is in differential mode, and one of the hydraulic cylinders is in follow-up mode;

[0050] Drive gear D2: one of the hydraulic cylinders is in normal mode, and one of the hydraulic cylinders is in follow-up mode; or both hydraulic cylinders are in differential mode;

[0051] Drive gear D3: one of the hydraulic cylinders is in normal mode, and one of the hydraulic cylinders is in differential mode;

[0052] Drive gear D4: both hydraulic cylinders are in normal mode;

[0053] The drive gear of the driving source is adjusted according to the load, comprising:

[0054] In response to the load increasing to threshold V1, the driving source is adjusted from drive gear D1 to drive gear D2;

[0055] In response to the load increasing to threshold V2, the driving source is adjusted from drive gear D2 to drive gear D3;

[0056] in response to the load increasing to a threshold value V3, adjusting the driving source from the driving gear D3 to the driving gear D4;

[0057] the adjusting the driving gear of the driving source according to the load further comprises:

[0058] in response to the load decreasing to a threshold value V3, adjusting the driving source from the driving gear D4 to the driving gear D3;

[0059] in response to the load decreasing to a threshold value V2, adjusting the driving source from the driving gear D3 to the driving gear D2;

[0060] in response to the load decreasing to a threshold value V1, adjusting the driving source from the driving gear D2 to the driving gear D1.

[0061] in an improved technical solution, the driving source is composed of three hydraulic cylinders;

[0062] the driving gears of the driving source are specifically set as:

[0063] the driving gear D1: all the three hydraulic cylinders are in differential mode;

[0064] the driving gear D2: one of the hydraulic cylinders is in normal mode, and the other two hydraulic cylinders are in differential mode;

[0065] the driving gear D3: one of the hydraulic cylinders is in differential mode, and the other two hydraulic cylinders are in normal mode;

[0066] the driving gear D4: all the three hydraulic cylinders are in normal mode;

[0067] the adjusting the driving gear of the driving source according to the load comprises:

[0068] in response to the load increasing to a threshold value V1, adjusting the driving source from the driving gear D1 to the driving gear D2;

[0069] in response to the load increasing to a threshold value V2, adjusting the driving source from the driving gear D2 to the driving gear D3;

[0070] in response to the load increasing to a threshold value V3, adjusting the driving source from the driving gear D3 to the driving gear D4;

[0071] the adjusting the driving gear of the driving source according to the load further comprises:

[0072] in response to the load decreasing to a threshold value V3, adjusting the driving source from the driving gear D4 to the driving gear D3;

[0073] in response to the load decreasing to a threshold value V2, adjusting the driving source from the driving gear D3 to the driving gear D2;

[0074] In response to the load decreasing to the threshold value V1, the drive source is adjusted from the drive gear D2 to the drive gear D1.

[0075] In another aspect, the application also provides a hydraulic drive device for implementing the shear control method described above, which comprises:

[0076] a first oil port and a second oil port for oil inlet and oil return;

[0077] a first hydraulic cylinder, the piston rod of which is connected to the movable tool holder;

[0078] a second hydraulic cylinder, the piston rod of which is connected to the movable tool holder;

[0079] a third hydraulic cylinder, the piston rod of which is connected to the movable tool holder;

[0080] a first oil path connecting the rodless chamber of the first hydraulic cylinder to the first oil port;

[0081] a second oil path connecting the rod chamber of the first hydraulic cylinder to the second oil port;

[0082] a third oil path connecting the rodless chamber of the second hydraulic cylinder to the first oil port, on which a first switch unit is arranged;

[0083] a fourth oil path connecting the rod chamber of the second hydraulic cylinder to the second oil port, on which a second switch unit is arranged;

[0084] a fifth oil path connecting the rodless chamber of the third hydraulic cylinder to the first oil port, on which a third switch unit is arranged;

[0085] a sixth oil path connecting the rod chamber of the third hydraulic cylinder to the second oil port, on which a fourth switch unit is arranged;

[0086] a seventh oil path connecting between the rodless chamber and the rod chamber of the first hydraulic cylinder, on which a fifth switch unit is arranged;

[0087] an eighth oil path connecting between the rodless chamber and the rod chamber of the second hydraulic cylinder, on which a sixth switch unit is arranged;

[0088] a ninth oil path connecting between the rodless chamber and the rod chamber of the third hydraulic cylinder, on which a seventh switch unit is arranged;

[0089] a tenth oil path connecting between the rodless chamber of the second hydraulic cylinder and the oil tank, on which a first liquid filling valve is arranged, and the oil inlet of the first liquid filling valve is arranged at one end of the oil tank, and the oil outlet is arranged at one end of the rodless chamber of the second hydraulic cylinder;

[0090] Eleventh oil path, connected between the rodless cavity of the third hydraulic cylinder and the oil tank, a second liquid filling valve is arranged on the eleventh oil path, and an oil inlet of the second liquid filling valve is arranged at one end of the oil tank, and an oil outlet is arranged at one end of the rodless cavity of the third hydraulic cylinder.

[0091] In another aspect, the application also provides a hydraulic driving device for implementing the shear control method described above, the hydraulic driving device comprising:

[0092] A third oil port and a fourth oil port are used for oil inlet and oil outlet;

[0093] A fourth hydraulic cylinder, the piston rod of which is connected to the movable tool holder;

[0094] A fifth hydraulic cylinder, the piston rod of which is connected to the movable tool holder;

[0095] A twelfth oil path connects the rodless cavity of the fourth hydraulic cylinder to the third oil port;

[0096] A thirteenth oil path connects the rod cavity of the fourth hydraulic cylinder to the fourth oil port, and an eighth switch unit is arranged on the thirteenth oil path;

[0097] A fourteenth oil path connects the rodless cavity of the fifth hydraulic cylinder to the third oil port;

[0098] A fifteenth oil path connects the rod cavity of the fifth hydraulic cylinder to the fourth oil port;

[0099] A sixteenth oil path connects between the rodless cavity and the rod cavity of the fourth hydraulic cylinder, and a ninth switch unit is arranged on the sixteenth oil path;

[0100] A seventeenth oil path connects between the rodless cavity and the rod cavity of the fifth hydraulic cylinder, and a tenth switch unit is arranged on the seventeenth oil path.

[0101] In another aspect, the application also provides a hydraulic driving device for implementing the shear control method described above, the hydraulic driving device comprising:

[0102] A fifth oil port and a sixth oil port are used for oil inlet and oil outlet;

[0103] A sixth hydraulic cylinder, the piston rod of which is connected to the movable tool holder;

[0104] A seventh hydraulic cylinder, the piston rod of which is connected to the movable tool holder;

[0105] An eighteenth oil path connects the rodless cavity of the sixth hydraulic cylinder to the fifth oil port;

[0106] A nineteenth oil path connects the rod cavity of the sixth hydraulic cylinder to the sixth oil port;

[0107] A twentieth oil path connects the rodless cavity of the seventh hydraulic cylinder to the fifth oil port, and an eleventh switch unit is arranged on the twentieth oil path;

[0108] The twenty-first oil path connects the rod cavity of the seventh hydraulic cylinder to the sixth oil port, and the twelfth switch unit is arranged on the twenty-first oil path;

[0109] The twenty-second oil path is connected between the rodless cavity and the rod cavity of the sixth hydraulic cylinder, and the thirteenth switch unit is arranged on the twenty-second oil path;

[0110] The twenty-third oil path is connected between the rodless cavity and the rod cavity of the seventh hydraulic cylinder, and the fourteenth switch unit is arranged on the twenty-third oil path;

[0111] The thirty-third oil path is connected between the rodless cavity of the seventh hydraulic cylinder and the oil tank, and the third liquid filling valve is arranged on the thirty-third oil path, and the oil inlet of the third liquid filling valve is arranged at one end of the oil tank, and the oil outlet is arranged at one end of the rodless cavity of the seventh hydraulic cylinder.

[0112] In another aspect, the application also provides a hydraulic driving device for implementing the shear control method, and the hydraulic driving device comprises:

[0113] The seventh oil port and the eighth oil port are used for oil inlet and oil outlet;

[0114] The eighth hydraulic cylinder, the piston rod of which is connected to the movable tool holder;

[0115] The ninth hydraulic cylinder, the piston rod of which is connected to the movable tool holder;

[0116] The tenth hydraulic cylinder, the piston rod of which is connected to the movable tool holder;

[0117] The twenty-fourth oil path connects the rodless cavity of the eighth hydraulic cylinder to the seventh oil port;

[0118] The twenty-fifth oil path connects the rod cavity of the eighth hydraulic cylinder to the eighth oil port, and the fifteenth switch unit is arranged on the twenty-fifth oil path;

[0119] The twenty-sixth oil path connects the rodless cavity of the ninth hydraulic cylinder to the seventh oil port;

[0120] The twenty-seventh oil path connects the rod cavity of the ninth hydraulic cylinder to the eighth oil port, and the sixteenth switch unit is arranged on the twenty-seventh oil path;

[0121] The twenty-eighth oil path connects the rodless cavity of the tenth hydraulic cylinder to the seventh oil port;

[0122] The twenty-ninth oil path connects the rod cavity of the tenth hydraulic cylinder to the eighth oil port;

[0123] The thirtieth oil path is connected between the rodless cavity and the rod cavity of the eighth hydraulic cylinder, and the seventeenth switch unit is arranged on the thirtieth oil path;

[0124] The thirty-first oil path is connected between the rodless cavity and the rod cavity of the ninth hydraulic cylinder, and the eighteenth switch unit is arranged on the thirty-first oil path;

[0125] A thirty-second oil path is connected between the rodless chamber and the rod chamber of the tenth hydraulic cylinder, and a nineteenth switch unit is arranged on the thirty-second oil path.

[0126] On the other hand, the application also provides a shearing control device, which is applied to a gantry shearing machine, the gantry shearing machine comprising a movable blade holder, a fixed blade holder, and a driving source for driving the movable blade holder, the movable blade holder being capable of combining with the fixed blade holder to shear materials under the driving of the driving source; the shearing control device comprising:

[0127] a detection module for detecting a load of the gantry shearing machine in a shearing process;

[0128] an adjustment module for adjusting a driving gear of the driving source according to the load, so that the driving gear of the driving source matches the size of the load; wherein the driving source has at least two driving gears, and different driving gears correspond to different driving force peaks of different sizes, and the greater the load is, the greater the driving force peak of the driving gear matched therewith is.

[0129] On the other hand, the application also provides a gantry shearing machine, which comprises a movable blade holder, a fixed blade holder, and a driving source for driving the movable blade holder, the movable blade holder being capable of combining with the fixed blade holder to shear materials under the driving of the driving source;

[0130] The gantry shearing machine further comprises a controller, and the controller is used to realize the shearing control method according to any one of the above.

[0131] The application provides a shearing control method capable of matching different loads, which can automatically adjust the size of output shearing force through hydraulic oil path switching according to the size of the load, so that the maximum shearing force output by the gantry shearing machine is divided into multiple driving gears to match different loads, so as to balance the driving efficiency and driving force peak of the hydraulic cylinder, and realize faster working efficiency under the condition that the driving force is sufficient. When the shearing load is small, only a small number of oil cylinders or a small working area of the oil cylinder is needed to output the shearing force. Compared with the prior art, the action speed of the oil cylinder is faster under the same flow. When the load is large, the number of oil cylinders or the working area of the oil cylinder outputting the shearing force is gradually increased according to the need of the shearing force. BRIEF DESCRIPTION OF DRAWINGS

[0132] Figure 1 is one of the flowcharts of the shearing control method in the embodiments of the application.

[0133] Figure 2 is the second flowchart of the shearing control method in the embodiments of the application.

[0134] Figure 3 is the third flowchart of the shearing control method in the embodiments of the application.

[0135] Figure 4 Figure 4 is a flowchart of a shearing control method in an embodiment of the present application.

[0136] Figure 5 Figure 1 is a structural schematic diagram of a hydraulic driving device in an embodiment of the present application.

[0137] Figure 6 Figure 2 is a structural schematic diagram of a hydraulic driving device in an embodiment of the present application.

[0138] Figure 7 Figure 3 is a structural schematic diagram of a hydraulic driving device in an embodiment of the present application.

[0139] Figure 8 Figure 4 is a structural schematic diagram of a hydraulic driving device in an embodiment of the present application.

[0140] Figure 9 Figure 5 is a schematic block diagram of a shearing control device in an embodiment of the present application.

[0141] Figure 10 Figure 6 is a schematic block diagram of a driving control part of a gantry shearing machine in an embodiment of the present application. DETAILED DESCRIPTION

[0142] The following is a specific embodiment of the present application and further describes the technical solutions of the present application in conjunction with the drawings, but the present application is not limited to these embodiments. In the following description, specific details such as specific configurations and components are provided only to help a comprehensive understanding of the embodiments of the present application. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, in order to be clear and concise, the description of known functions and structures is omitted.

[0143] It should be noted that the embodiments and features in the embodiments can be combined with each other without conflict.

[0144] The present application proposes a shearing control method that can match different loads, which can adjust the size of the output shearing force through hydraulic oil circuit switching according to the size of the load, so that the shearing tonnage of the gantry shearing machine is divided into multiple gears to match different loads.

[0145] Specifically, the process of the moving knife holder of the gantry shearing machine moving downward includes the process of contacting the material before the load and the shearing process after contacting the material. The technical solution of the present application is applied to the shearing process of the gantry shearing machine.

[0146] The shear control method is applied to a gantry shear machine, which comprises a movable blade holder, a fixed blade holder, and a driving source for driving the movable blade holder, and the movable blade holder can be combined with the fixed blade holder under the driving of the driving source to shear materials. Referring to Figure 1 The shear control method comprises steps S101 and S102, which will be described below in combination with the drawings.

[0147] In step S101, the load of the gantry shear machine in the shearing process is detected.

[0148] In step S102, the driving gear of the driving source is adjusted according to the load, so that the driving gear of the driving source matches the size of the load; wherein the driving source has at least two driving gears, and different driving gears correspond to different driving force peaks, and the greater the load, the greater the driving force peak of the driving gear matched therewith.

[0149] In the embodiment of the present application, the controller of the gantry shear machine detects the load of the driving source. In a specific example, the load of the driving source is the shearing force output by the driving source. When the driving source is a hydraulic cylinder, the controller can calculate the size of the shearing force through real-time parameters of the hydraulic system. Specifically, the shearing force is the effective area of all hydraulic cylinders multiplied by the working pressure of the hydraulic system. Further, the size of the shearing force of the driving source can also be measured by a related pressure sensor, and the controller reads the corresponding signal from the pressure sensor to obtain the size of the shearing force.

[0150] It should be understood that in step S101, the shearing process of the gantry shear machine is the process of shearing work after the movable blade holder contacts the material. In contrast, the idle stroke is the process in which the movable blade holder does not contact the material. The process improved by the technical solution of the present application is the process of shearing work after the movable blade holder contacts the material.

[0151] In addition, in a specific embodiment, the number of driving gears of the driving source can be 2, 3, 4, 5, 6, 7, 8, 9, …, etc. In a specific embodiment, the number of driving gears of the driving source is at least 3.

[0152] Further, the controller can set multiple driving gears according to the size of the load. When the load is small, the controller can control the driving source to drive the gear with a small driving force peak, and as the load increases, the controller gradually increases the gear to match the size of the load. When the driving source is a hydraulic cylinder, when the shearing load is small, only a small number of cylinders or a small working area of the cylinder is needed to output the shearing force. Compared with the prior art, under the same flow, the hydraulic cylinder moves faster. When the load is large, the number of cylinders or the working area of the cylinder outputting the shearing force is gradually increased according to the need of the shearing force.

[0153] In addition, after the driving gear is subdivided into multiple gears, in actual work, the movable tool holder is first extended at the smallest driving gear, and after detecting the load, the driving gear is switched to a suitable driving gear, which can be increased from small to large according to the working condition, or can jump over some driving gears.

[0154] In an embodiment of the present application, the driving source is composed of multiple hydraulic cylinders; and the adjusting of the driving gear of the driving source specifically comprises: changing the working mode of one or more hydraulic cylinders to realize the adjustment of the driving gear; at least one hydraulic cylinder has two or three working modes of a normal mode, a differential mode and a follow-up mode, wherein the normal mode is an extension driving mode in which the rodless cavity of the hydraulic cylinder is supplied with oil and the rod cavity is returned with oil; the differential mode is based on the normal mode, and the oil in the rod cavity of the hydraulic cylinder is returned to the rodless cavity through a differential circuit; and in the follow-up mode, the piston rod of the hydraulic cylinder freely extends with the movable tool holder.

[0155] Specifically, when the hydraulic cylinder is in the normal mode, the pressure oil is injected into the rodless cavity of the hydraulic cylinder through the hydraulic pipeline, and the oil in the rod cavity is discharged to the oil tank; with the oil supply to the rodless cavity and the oil return from the rodless cavity, the piston rod is driven to extend by the high-pressure oil in the rodless cavity.

[0156] When the hydraulic cylinder is in the differential mode, the oil in the rod cavity of the hydraulic cylinder is returned to the rodless cavity through a differential circuit, and at this time, the hydraulic cylinder is provided with a differential connection, which connects the oil supply and the oil return of the hydraulic cylinder together, and the oil in the rod cavity of the oil cylinder is returned to the rodless cavity to increase the speed of the extension of the hydraulic cylinder.

[0157] When the hydraulic cylinder is in the follow-up mode, the oil inlet and outlet of the hydraulic cylinder are open, the oil freely enters and exits, and the piston rod freely extends and contracts with the movement of the mechanical part without outputting power.

[0158] Further, when the hydraulic cylinder is in the normal mode, the effective area of the hydraulic cylinder for work is the cross-sectional area of the piston. When the hydraulic cylinder is in the differential mode, the effective area of the hydraulic cylinder for work is the difference between the effective areas on both sides of the piston, which is smaller than that in the normal mode, and under the same flow, the extension speed is faster. When the hydraulic cylinder is in the differential mode, the effective area of the hydraulic cylinder for work can be considered as 0. When the hydraulic cylinder is in different modes, the effective area of the hydraulic cylinder for work is different, the peak driving force is different, and the extension speed is different. Therefore, the controller can change the working mode of one or more hydraulic cylinders to realize the adjustment of the driving gear, so that when the shear load is small, only a small number of oil cylinders or a small working area of the oil cylinder is needed to output the shear force, and when the load is large, the number of oil cylinders or the working area of the oil cylinder for outputting the shear force is gradually increased according to the need of the shear force.

[0159] In one embodiment of this application, the drive source is provided with drive gears D1, ..., D2 in ascending order of peak driving force. n There are n drive levels in total, and threshold values ​​V1, ..., V are set sequentially according to the load from smallest to largest. n-1 There are a total of n-1 thresholds, where n≥2.

[0160] See Figure 2 Step S102, adjusting the drive level of the drive source according to the load, includes:

[0161] Step S102a, in response to the load increasing to the threshold V i Change the drive source from drive gear D i Adjust to drive mode D i+1 ; where i takes the value of an integer from 1 to n-1.

[0162] During the shearing process of the gantry shearing machine, as the shearing load increases, the load sequentially increases to threshold V1, ..., threshold V. n-1 Initially, when the load is less than the threshold V1, the controller keeps the drive source in drive position D1. When the load reaches the threshold V1, it shifts up one gear, from drive position D1 to drive position D2, increasing the peak driving force of the drive source by one gear. This process continues until the load increases to the threshold V1. i At that time, the controller will switch the drive source from drive position D. i Adjust to drive mode D i+1 until the load reaches the threshold V n-1 Adjust the drive source to drive mode D. n .

[0163] Further, step S102, adjusting the drive level of the drive source according to the load, also includes:

[0164] Step S102b, in response to the load decreasing to a threshold V i Change the drive source from drive gear D i+1 Adjust to drive mode D i ; where i takes the value of an integer from 1 to n-1.

[0165] Specifically, during the shearing process, as the shearing load decreases, the controller controls the drive source to reduce the drive level.

[0166] Through the adjustment of steps S102a and S102b, when the load is small, the controller can control the driving source to drive in a gear with a small peak driving force, and as the load increases, the controller gradually increases the gear to match the load size. The driving source is a hydraulic cylinder, when the shear load is small, only a small number of oil cylinders or a small working area of the oil cylinder is needed to output the shear force. Compared with the prior art, under the same flow, the hydraulic cylinder moves faster. When the load is large, the number of oil cylinders or the working area of the oil cylinder outputting the shear force is gradually increased according to the need of the shear force.

[0167] In an embodiment of the present application, the driving source is composed of three hydraulic cylinders; and the driving gears of the driving source are specifically set as driving gear D1, driving gear D2, driving gear D3, driving gear D4, driving gear D5, and driving gear D6.

[0168] The specific settings of each gear are as follows:

[0169] Driving gear D1: one of the hydraulic cylinders is in differential mode, and the other two hydraulic cylinders are in follow-up mode;

[0170] Driving gear D2: one of the hydraulic cylinders is in normal mode, and the other two hydraulic cylinders are in follow-up mode;

[0171] Driving gear D3: all the three hydraulic cylinders are in differential mode;

[0172] Driving gear D4: one of the hydraulic cylinders is in normal mode, and the other two hydraulic cylinders are in differential mode; or, two of the hydraulic cylinders are in normal mode, and one of the hydraulic cylinders is in follow-up mode;

[0173] Driving gear D5: one of the hydraulic cylinders is in differential mode, and the other two hydraulic cylinders are in normal mode;

[0174] Driving gear D6: all the three hydraulic cylinders are in normal mode.

[0175] Reference Figure 3 , step S102, adjusting the driving gear of the driving source according to the load, comprising:

[0176] Step S1021, in response to the load increasing to threshold value V1, adjusting the driving source from driving gear D1 to driving gear D2.

[0177] Step S1022, in response to the load increasing to threshold value V2, adjusting the driving source from driving gear D2 to driving gear D3.

[0178] Step S1023, in response to the load increasing to threshold value V3, adjusting the driving source from driving gear D3 to driving gear D4.

[0179] Step S1024, in response to the load increasing to the threshold value V4, adjusting the driving source from the driving gear D4 to the driving gear D5.

[0180] Step S1025, in response to the load increasing to the threshold value V5, adjusting the driving source from the driving gear D5 to the driving gear D6.

[0181] Specifically, in steps S1021 to S1025, as the load increases, the load increases to the threshold value V1, the threshold value V2, the threshold value V3, the threshold value V4, and the threshold value V5 in turn, and the controller controls the driving gear of the driving source to increase in turn until the driving gear D6.

[0182] Reference Figure 4 Step S102, adjusting the driving gear of the driving source according to the load, further comprising:

[0183] Step S1026, in response to the load decreasing to the threshold value V5, adjusting the driving source from the driving gear D6 to the driving gear D5.

[0184] Step S1027, in response to the load decreasing to the threshold value V4, adjusting the driving source from the driving gear D5 to the driving gear D4.

[0185] Step S1028, in response to the load decreasing to the threshold value V3, adjusting the driving source from the driving gear D4 to the driving gear D3.

[0186] Step S1029, in response to the load decreasing to the threshold value V2, adjusting the driving source from the driving gear D3 to the driving gear D2.

[0187] Step S10210, in response to the load decreasing to the threshold value V1, adjusting the driving source from the driving gear D2 to the driving gear D1.

[0188] Specifically, in steps S1026 to S10210, as the load decreases, the load decreases to the threshold value V5, the threshold value V4, the threshold value V3, the threshold value V2, and the threshold value V1 in turn, and the controller controls the driving gear of the driving source to decrease in turn until the driving gear D1.

[0189] In order to realize the above-mentioned driving gear setting, the embodiment of the application further provides a hydraulic driving device. The hydraulic driving device is used to realize the above-mentioned shearing control method. Referring to Figure 5 The hydraulic driving device has three hydraulic cylinders, and the three hydraulic cylinders cooperate to drive the tool holder 23.

[0190] Reference Figure 5The hydraulic driving device comprises a first hydraulic cylinder 1, a second hydraulic cylinder 2, and a third hydraulic cylinder 3, the piston rod of the first hydraulic cylinder 1 is connected with the movable tool holder, the piston rod of the second hydraulic cylinder 2 is connected with the movable tool holder, and the piston rod of the third hydraulic cylinder 3 is connected with the movable tool holder.

[0191] The hydraulic driving device further comprises a first oil port A1 and a second oil port B1, and a first oil path 4 to an eleventh oil path 14.

[0192] The first oil path 4 connects the rodless cavity of the first hydraulic cylinder 1 to the first oil port A1.

[0193] The second oil path 5 connects the rod cavity of the first hydraulic cylinder 1 to the second oil port B1.

[0194] The third oil path 6 connects the rodless cavity of the second hydraulic cylinder 2 to the first oil port A1, and a first switch unit 61 is arranged on the third oil path 6.

[0195] The fourth oil path 7 connects the rod cavity of the second hydraulic cylinder 2 to the second oil port B1, and a second switch unit 71 is arranged on the fourth oil path 7.

[0196] The fifth oil path 8 connects the rodless cavity of the third hydraulic cylinder 3 to the first oil port A1, and a third switch unit 81 is arranged on the fifth oil path 8.

[0197] The sixth oil path 9 connects the rod cavity of the third hydraulic cylinder 3 to the second oil port B1, and a fourth switch unit 91 is arranged on the sixth oil path 9.

[0198] The seventh oil path 10 is connected between the rodless cavity and the rod cavity of the first hydraulic cylinder 1, and a fifth switch unit 101 is arranged on the seventh oil path 10.

[0199] The eighth oil path 11 is connected between the rodless cavity and the rod cavity of the second hydraulic cylinder 2, and a sixth switch unit 111 is arranged on the eighth oil path 11.

[0200] The ninth oil path 12 is connected between the rodless cavity and the rod cavity of the third hydraulic cylinder 3, and a seventh switch unit 121 is arranged on the ninth oil path 12.

[0201] The tenth oil path 13 is connected between the rodless cavity of the second hydraulic cylinder 2 and an oil tank C, and a first liquid filling valve 131 is arranged on the tenth oil path 13, and an oil inlet of the first liquid filling valve is arranged at one end of the oil tank, and an oil outlet is arranged at one end of the rodless cavity of the second hydraulic cylinder 2.

[0202] The eleventh oil path 14 is connected between the rodless cavity of the third hydraulic cylinder 3 and the oil tank C, and a second liquid filling valve 141 is arranged on the eleventh oil path 14, and an oil inlet of the second liquid filling valve is arranged at one end of the oil tank, and an oil outlet is arranged at one end of the rodless cavity of the third hydraulic cylinder 3.

[0203] The following is based on the hydraulic structure described above, and the specific drive gear implementation is described in detail.

[0204] For the drive gear D1, one of the hydraulic cylinders is in differential mode, and two of the hydraulic cylinders are in follow-up mode. Specifically, the first hydraulic cylinder 1 is in differential mode, and the second hydraulic cylinder 2 and the third hydraulic cylinder 3 are in follow-up mode. Under the drive gear D1, the first switch unit 61, the second switch unit 71, the third switch unit 81, and the fourth switch unit 91 are closed, and the fifth switch unit 101, the sixth switch unit 111, and the seventh switch unit 121 are opened. The second oil port B1 is closed, and the first oil port A1 is in oil. The first hydraulic cylinder 1 is connected in differential through the seventh oil path 10, the second hydraulic cylinder 2 is connected in differential through the eighth oil path 11, and the third hydraulic cylinder 3 is connected in differential through the ninth oil path 12. The pressure oil is injected from the first oil port A1 to drive the first hydraulic cylinder 1 to advance in differential, and the second hydraulic cylinder 2 and the third hydraulic cylinder 3 advance in follow-up, and in the process of advancing in follow-up, the second hydraulic cylinder 2 is supplemented through the tenth oil path 13, and the third hydraulic cylinder 3 is supplemented through the eleventh oil path 14.

[0205] For the drive gear D2, one of the hydraulic cylinders is in ordinary mode, and two of the hydraulic cylinders are in follow-up mode. Specifically, the first hydraulic cylinder 1 is in ordinary mode, and the second hydraulic cylinder 2 and the third hydraulic cylinder 3 are in follow-up mode. Under the drive gear D2, the first switch unit 61, the second switch unit 71, the third switch unit 81, the fourth switch unit 91, and the fifth switch unit 101 are closed, and the sixth switch unit 111 and the seventh switch unit 121 are opened. The second oil port B1 is returned to oil, and the first oil port A1 is in oil. The second hydraulic cylinder 2 is connected in differential through the eighth oil path 11, and the third hydraulic cylinder 3 is connected in differential through the ninth oil path 12. The pressure oil is injected from the first oil port A1 and discharged from the second oil port B1 to drive the first hydraulic cylinder 1 to advance at the work speed, and the second hydraulic cylinder 2 and the third hydraulic cylinder 3 advance in follow-up, and in the process of advancing in follow-up, the second hydraulic cylinder 2 is supplemented through the tenth oil path 13, and the third hydraulic cylinder 3 is supplemented through the eleventh oil path 14.

[0206] For the drive gear D3, all three hydraulic cylinders are in differential mode. Under the drive gear D3, the first switch unit 61, the third switch unit 81, the fifth switch unit 101, the sixth switch unit 111, and the seventh switch unit 121 are opened, and the second switch unit 71 and the fourth switch unit 91 are closed. The second oil port B1 is closed, and the first oil port A1 is in oil. The first hydraulic cylinder 1 is connected in differential through the seventh oil path 10, the second hydraulic cylinder 2 is connected in differential through the eighth oil path 11, and the third hydraulic cylinder 3 is connected in differential through the ninth oil path 12. The pressure oil is injected from the first oil port A1 to drive the first hydraulic cylinder 1, the second hydraulic cylinder 2, and the third hydraulic cylinder 3 to advance in differential.

[0207] For driving gear D4, one of the hydraulic cylinders is in normal mode, two of the hydraulic cylinders are in differential mode; or, two of the hydraulic cylinders are in normal mode, one of the hydraulic cylinders is in follow-up mode. There are three schemes, scheme one: the first hydraulic cylinder 1 is in normal mode, the second hydraulic cylinder 2 is in differential mode, and the third hydraulic cylinder 3 is in differential mode; scheme two: the first hydraulic cylinder 1 is in normal mode, the second hydraulic cylinder 2 is in normal mode, and the third hydraulic cylinder 3 is in follow-up mode; scheme three: the first hydraulic cylinder 1 is in normal mode, the second hydraulic cylinder 2 is in follow-up mode, and the third hydraulic cylinder 3 is in normal mode.

[0208] For scheme one, the first hydraulic cylinder 1 is in normal mode, the second hydraulic cylinder 2 is in differential mode, and the third hydraulic cylinder 3 is in differential mode. At this time, the first switch unit 61, the third switch unit 81, the sixth switch unit 111, and the seventh switch unit 121 are opened, the second switch unit 71, the fourth switch unit 91, and the fifth switch unit 101 are closed, the second oil port B1 returns oil, and the first oil port A1 admits oil. The second hydraulic cylinder 2 is connected in differential through the eighth oil path 11, and the third hydraulic cylinder 3 is connected in differential through the ninth oil path 12. The pressure oil liquid is injected from the first oil port A1 to drive the first hydraulic cylinder 1 to advance at working speed, and the second hydraulic cylinder 2 and the third hydraulic cylinder 3 to advance in differential.

[0209] For scheme two, the first hydraulic cylinder 1 is in normal mode, the second hydraulic cylinder 2 is in normal mode, and the third hydraulic cylinder 3 is in follow-up mode. At this time, the first switch unit 61, the second switch unit 71, and the seventh switch unit 121 are opened, the third switch unit 81, the fourth switch unit 91, the fifth switch unit 101, and the sixth switch unit 111 are closed, the second oil port B1 returns oil, and the first oil port A1 admits oil. The third hydraulic cylinder 3 is connected in differential through the ninth oil path 12. The pressure oil liquid is injected from the first oil port A1 to drive the first hydraulic cylinder 1 to advance at working speed, the second hydraulic cylinder 2 to advance at working speed, and the third hydraulic cylinder 3 to advance in follow-up.

[0210] For scheme three, the first hydraulic cylinder 1 is in normal mode, the second hydraulic cylinder 2 is in follow-up mode, and the third hydraulic cylinder 3 is in normal mode. At this time, the third switch unit 81, the fourth switch unit 91, and the sixth switch unit 111 are opened, the first switch unit 61, the second switch unit 71, the fifth switch unit 101, and the seventh switch unit 121 are closed, the second oil port B1 returns oil, and the first oil port A1 admits oil. The second hydraulic cylinder 2 is connected in differential through the eighth oil path 11. The pressure oil liquid is injected from the first oil port A1 to drive the first hydraulic cylinder 1 to advance at working speed, the second hydraulic cylinder 2 to advance in follow-up, and the third hydraulic cylinder 3 to advance at working speed.

[0211] For drive gear D5, one of the hydraulic cylinders is in differential mode, and the other two are in normal mode. Drive gear D5 can include two schemes, scheme one: the first hydraulic cylinder 1 is in normal mode, the second hydraulic cylinder 2 is in normal mode, and the third hydraulic cylinder 3 is in differential mode. Scheme two, the first hydraulic cylinder 1 is in normal mode, the second hydraulic cylinder 2 is in differential mode, and the third hydraulic cylinder 3 is in normal mode.

[0212] For scheme one of drive gear D5, the first hydraulic cylinder 1 is in normal mode, the second hydraulic cylinder 2 is in normal mode, and the third hydraulic cylinder 3 is in differential mode. At this time, the second switch unit 71 is on, the first switch unit 61 is on, the fourth switch unit 91 is off, the third switch unit 81 is on, the fifth switch unit 101 is off, the sixth switch unit 111 is off, the seventh switch unit 121 is on, the second oil port B1 returns oil, and the first oil port A1 admits oil. The third hydraulic cylinder 3 is connected in differential mode through the seventh oil path 10. The pressure oil is injected from the first oil port A1, driving the first hydraulic cylinder 1 to advance at working speed, the second hydraulic cylinder 2 to advance at working speed, and the third hydraulic cylinder 3 to advance in differential mode.

[0213] For scheme two of drive gear D5, the first hydraulic cylinder 1 is in normal mode, the second hydraulic cylinder 2 is in differential mode, and the third hydraulic cylinder 3 is in normal mode. At this time, the second switch unit 71 is off, the first switch unit 61 is on, the fourth switch unit 91 is on, the third switch unit 81 is on, the fifth switch unit 101 is off, the sixth switch unit 111 is on, the seventh switch unit 121 is off, the second oil port B1 returns oil, and the first oil port A1 admits oil. The second hydraulic cylinder 2 is connected in differential mode through the eighth oil path 11. The pressure oil is injected from the first oil port A1, driving the first hydraulic cylinder 1 to advance at working speed, the second hydraulic cylinder 2 to advance in differential mode, and the third hydraulic cylinder 3 to advance at working speed.

[0214] For drive gear D6, all three hydraulic cylinders are in normal mode. At this time, the first switch unit 61, the second switch unit 71, the third switch unit 81, and the fourth switch unit 91 are on, the fifth switch unit 101, the sixth switch unit 111, and the seventh switch unit 121 are off, the second oil port B1 returns oil, and the first oil port A1 admits oil. The pressure oil is injected from the first oil port A1, driving the first hydraulic cylinder 1 to advance at working speed, the second hydraulic cylinder 2 to advance at working speed, and the third hydraulic cylinder 3 to advance at working speed.

[0215] In the above embodiments, it should be noted that the relative arrangement positions of the cylinders are not limited and can be arbitrarily arranged and combined. In particular, in the three-cylinder scheme with a fast cylinder and a liquid charging valve, the fast cylinder can be in the middle or on both sides.

[0216] In an embodiment of the present application, the driving source is composed of two hydraulic cylinders. The driving gears of the driving source are specifically set as driving gear D1, driving gear D2, and driving gear D3.

[0217] The specific settings of each gear are as follows:

[0218] Driving gear D1: both hydraulic cylinders are in differential mode;

[0219] Driving gear D2: one hydraulic cylinder is in normal mode and the other hydraulic cylinder is in differential mode;

[0220] Driving gear D3: both hydraulic cylinders are in normal mode.

[0221] The driving gears of the driving source are adjusted according to the load, comprising:

[0222] In response to the load increasing to threshold value V1, the driving source is adjusted from driving gear D1 to driving gear D2.

[0223] In response to the load increasing to threshold value V2, the driving source is adjusted from driving gear D2 to driving gear D3.

[0224] Specifically, as the load increases, the load increases to threshold value V1 and threshold value V2 in turn, and the driving gears of the driving source are controlled to increase in turn until driving gear D3.

[0225] The driving gears of the driving source are adjusted according to the load, further comprising:

[0226] In response to the load decreasing to threshold value V2, the driving source is adjusted from driving gear D3 to driving gear D2.

[0227] In response to the load decreasing to threshold value V1, the driving source is adjusted from driving gear D2 to driving gear D1.

[0228] Specifically, as the load decreases, the load decreases to threshold value V2 and threshold value V1 in turn, and the driving gears of the driving source are controlled to decrease in turn until driving gear D1.

[0229] In order to realize the above-mentioned driving gear settings, an embodiment of the present application further provides a hydraulic driving device. The hydraulic driving device is used to realize the above-mentioned shearing control method. The hydraulic driving device has two hydraulic cylinders, and the two hydraulic cylinders cooperate to drive the moving knife holder 23.

[0230] Reference Figure 6 , the hydraulic driving device comprises a fourth hydraulic cylinder 15 and a fifth hydraulic cylinder 16, wherein the piston rod of the fourth hydraulic cylinder 15 is connected with the moving knife holder, and the piston rod of the fifth hydraulic cylinder 16 is connected with the moving knife holder.

[0231] The hydraulic drive device further comprises a third oil port A2 and a fourth oil port B2, and twelfth to seventeenth oil paths 17-22. The third oil port A2 and the fourth oil port B2 are used for oil inlet and oil return, one for oil inlet and one for oil return, and can be converted with each other.

[0232] The twelfth oil path 17 connects the rodless chamber of the fourth hydraulic cylinder 15 to the third oil port A2.

[0233] The thirteenth oil path 18 connects the rod chamber of the fourth hydraulic cylinder 15 to the fourth oil port B2, on which an eighth switch unit 181 is arranged.

[0234] The fourteenth oil path 19 connects the rodless chamber of the fifth hydraulic cylinder 16 to the third oil port A2.

[0235] The fifteenth oil path 20 connects the rod chamber of the fifth hydraulic cylinder 16 to the fourth oil port B2.

[0236] The sixteenth oil path 21 is connected between the rodless chamber and the rod chamber of the fourth hydraulic cylinder 15, on which a ninth switch unit 211 is arranged.

[0237] The seventeenth oil path 22 is connected between the rodless chamber and the rod chamber of the fifth hydraulic cylinder 16, on which a tenth switch unit 221 is arranged.

[0238] The following will be described in detail based on the above hydraulic structure.

[0239] For the drive gear D1, both hydraulic cylinders are in differential mode. Under the drive gear D1, the eighth switch unit 181 is closed, the ninth switch unit 211 and the tenth switch unit 221 are opened, the fourth oil port B2 is closed, and the third oil port A2 is oil inlet. The fourth hydraulic cylinder 15 is connected in differential mode through the sixteenth oil path 21, and the fifth hydraulic cylinder 16 is connected in differential mode through the seventeenth oil path 22. The pressure oil is injected from the third oil port A2, and the fourth hydraulic cylinder 15 and the fifth hydraulic cylinder 16 are driven to advance in differential mode.

[0240] For the drive gear D2, one of the hydraulic cylinders is in ordinary mode and the other is in differential mode. Specifically, the fourth hydraulic cylinder 15 is in differential mode and the fifth hydraulic cylinder 16 is in ordinary mode, the ninth switch unit 211 is opened, the tenth switch unit 221 and the eighth switch unit 181 are closed, the fourth oil port B2 is oil return, and the third oil port A2 is oil inlet. The fourth hydraulic cylinder 15 is connected in differential mode through the sixteenth oil path 21. The pressure oil is injected from the third oil port A2, and the fourth hydraulic cylinder 15 is driven to advance in differential mode and the fifth hydraulic cylinder 16 is driven to advance in ordinary mode.

[0241] For driving gear D3, both hydraulic cylinders are in normal mode, the ninth switch unit 211 and the tenth switch unit 221 are closed, the eighth switch unit 181 is opened, the fourth oil port B2 returns oil, and the third oil port A2 admits oil. The pressure oil is injected from the third oil port A2, and the fourth hydraulic cylinder 15 and the fifth hydraulic cylinder 16 are driven to advance at a high speed.

[0242] In an embodiment of the present application, the driving source is composed of two hydraulic cylinders; and the driving gears of the driving source are specifically provided as driving gear D1, driving gear D2, driving gear D3, and driving gear D4.

[0243] The specific settings of each gear are as follows:

[0244] Driving gear D1: one of the hydraulic cylinders is in differential mode, and the other hydraulic cylinder is in follow-up mode;

[0245] Driving gear D2: one of the hydraulic cylinders is in normal mode, and the other hydraulic cylinder is in follow-up mode; or both hydraulic cylinders are in differential mode;

[0246] Driving gear D3: one of the hydraulic cylinders is in normal mode, and the other hydraulic cylinder is in differential mode;

[0247] Driving gear D4: both hydraulic cylinders are in normal mode.

[0248] The adjusting the driving gear of the driving source according to the load comprises:

[0249] In response to the load increasing to a threshold value V1, the driving source is adjusted from driving gear D1 to driving gear D2.

[0250] In response to the load increasing to a threshold value V2, the driving source is adjusted from driving gear D2 to driving gear D3.

[0251] In response to the load increasing to a threshold value V3, the driving source is adjusted from driving gear D3 to driving gear D4.

[0252] The adjusting the driving gear of the driving source according to the load further comprises:

[0253] In response to the load decreasing to a threshold value V3, the driving source is adjusted from driving gear D4 to driving gear D3.

[0254] In response to the load decreasing to a threshold value V2, the driving source is adjusted from driving gear D3 to driving gear D2.

[0255] In response to the load decreasing to a threshold value V1, the driving source is adjusted from driving gear D2 to driving gear D1.

[0256] In order to achieve the above-mentioned drive gear setting, the embodiment of the present application further provides a hydraulic drive device. The hydraulic drive device is used to realize the above-mentioned shear control method. The hydraulic drive device has two hydraulic cylinders, and the two hydraulic cylinders cooperate to drive the moving tool holder 23.

[0257] Reference Figure 7 The hydraulic drive device comprises a sixth hydraulic cylinder 24 and a seventh hydraulic cylinder 25, wherein the piston rod of the sixth hydraulic cylinder 24 is connected with the moving tool holder, and the piston rod of the seventh hydraulic cylinder 25 is connected with the moving tool holder.

[0258] The hydraulic drive device further comprises a fifth oil port A3 and a sixth oil port B3, and an eighteenth oil path 26 to a twenty-third oil path 31. The fifth oil port A3 and the sixth oil port B3 are used for oil inlet and oil return, one for oil inlet and one for oil return, and can be converted with each other.

[0259] The fifth oil port A3 and the sixth oil port B3 are used for oil inlet and oil return.

[0260] The eighteenth oil path 26 connects the rodless cavity of the sixth hydraulic cylinder 24 to the fifth oil port A3.

[0261] The nineteenth oil path 27 connects the rod cavity of the sixth hydraulic cylinder 24 to the sixth oil port B3.

[0262] The twentieth oil path 28 connects the rodless cavity of the seventh hydraulic cylinder 25 to the fifth oil port A3, and is provided with an eleventh switch unit 281.

[0263] The twenty-first oil path 29 connects the rod cavity of the seventh hydraulic cylinder 25 to the sixth oil port B3, and is provided with a twelfth switch unit 291.

[0264] The twenty-second oil path 30 is connected between the rodless cavity and the rod cavity of the sixth hydraulic cylinder 24, and is provided with a thirteenth switch unit 301.

[0265] The twenty-third oil path 31 is connected between the rodless cavity and the rod cavity of the seventh hydraulic cylinder 25, and is provided with a fourteenth switch unit 311.

[0266] The thirty-third oil path 32 is connected between the rodless cavity of the seventh hydraulic cylinder 25 and the oil tank, and is provided with a third liquid filling valve 321, and the oil inlet of the third liquid filling valve 321 is provided with an oil tank end, and the oil outlet is provided with a rodless cavity end of the seventh hydraulic cylinder 25.

[0267] The following is based on the above-mentioned hydraulic structure, and the specific drive gear implementation is specifically described.

[0268] For driving gear D1, one of the hydraulic cylinders is in differential mode, and one of the hydraulic cylinders is in follow-up mode. Under driving gear D1, the eleventh switch unit 281 and the twelfth switch unit 291 are closed, the thirteenth switch unit 301 and the fourteenth switch unit 311 are opened, the sixth oil port B3 is closed, the fifth oil port A3 is opened, the sixth hydraulic cylinder 24 is connected in differential through the twenty-second oil path 30, the seventh hydraulic cylinder 25 is in follow-up mode, the pressure oil is injected from the fifth oil port A3, the sixth hydraulic cylinder 24 is driven to advance in differential, the seventh hydraulic cylinder 25 is driven to advance in follow-up, and the seventh hydraulic cylinder 25 is supplemented with oil through the thirty-third oil path 32 during the advancing in follow-up.

[0269] For driving gear D2, one of the hydraulic cylinders is in normal mode, one of the hydraulic cylinders is in follow-up mode, or both of the hydraulic cylinders are in differential mode. The driving gear D2 can be divided into two schemes: scheme one, the sixth hydraulic cylinder 24 is in normal mode, and the seventh hydraulic cylinder 25 is in follow-up mode; and scheme two, the sixth hydraulic cylinder 24 is in differential mode, and the seventh hydraulic cylinder 25 is in differential mode.

[0270] For scheme one, the sixth hydraulic cylinder 24 is in normal mode, and the seventh hydraulic cylinder 25 is in follow-up mode. At this time, the eleventh switch unit 281, the twelfth switch unit 291, and the thirteenth switch unit 301 are closed, and the fourteenth switch unit 311 is opened. The pressure oil is injected from the fifth oil port A3, the sixth hydraulic cylinder 24 is driven to advance at normal speed, the seventh hydraulic cylinder 25 is driven to advance in follow-up, and the seventh hydraulic cylinder 25 is supplemented with oil through the thirty-third oil path 32 during the advancing in follow-up.

[0271] For scheme two, the sixth hydraulic cylinder 24 is in differential mode, and the seventh hydraulic cylinder 25 is in differential mode. At this time, the twelfth switch unit 291 is closed, and the eleventh switch unit 281, the thirteenth switch unit 301, and the fourteenth switch unit 311 are opened. The sixth hydraulic cylinder 24 is connected in differential through the twenty-second oil path 30, the seventh hydraulic cylinder 25 is connected in differential through the twenty-third oil path 31, the pressure oil is injected from the fifth oil port A3, the sixth oil port B3 is closed, the sixth hydraulic cylinder 24 is driven to advance in differential, and the seventh hydraulic cylinder 25 is driven to advance in differential.

[0272] For driving gear D3, one of the hydraulic cylinders is in normal mode, and one of the hydraulic cylinders is in differential mode. Under driving gear D3, the twelfth switch unit 291 and the thirteenth switch unit 301 are closed, and the eleventh switch unit 281 and the fourteenth switch unit 311 are opened. The seventh hydraulic cylinder 25 is connected in differential through the twenty-third oil path 31, the pressure oil is injected from the fifth oil port A3, the sixth hydraulic cylinder 24 is driven to advance at normal speed, and the seventh hydraulic cylinder 25 is driven to advance in differential.

[0273] For driving gear D4, both hydraulic cylinders are in normal mode. At this time, the twelfth switch unit 291 and the eleventh switch unit 281 are opened, the thirteenth switch unit 301 and the fourteenth switch unit 311 are closed, and the pressure oil is injected from the fifth oil port A3 to drive the sixth hydraulic cylinder 24 to work at high speed forward and the seventh hydraulic cylinder 25 to work at high speed forward.

[0274] In an embodiment of the present application, the driving source is composed of three hydraulic cylinders; the driving source is composed of three hydraulic cylinders; the driving gears of the driving source are specifically provided as driving gear D1, driving gear D2, driving gear D3 and driving gear D4.

[0275] The driving gears of the driving source are specifically provided as:

[0276] Driving gear D1: all three hydraulic cylinders are in differential mode;

[0277] Driving gear D2: one of the hydraulic cylinders is in normal mode, and the other two hydraulic cylinders are in differential mode;

[0278] Driving gear D3: one of the hydraulic cylinders is in differential mode, and the other two hydraulic cylinders are in normal mode;

[0279] Driving gear D4: all three hydraulic cylinders are in normal mode;

[0280] The driving gears of the driving source are adjusted according to the load, comprising:

[0281] In response to the load increasing to threshold value V1, the driving source is adjusted from driving gear D1 to driving gear D2.

[0282] In response to the load increasing to threshold value V2, the driving source is adjusted from driving gear D2 to driving gear D3.

[0283] In response to the load increasing to threshold value V3, the driving source is adjusted from driving gear D3 to driving gear D4.

[0284] The driving gears of the driving source are adjusted according to the load, further comprising:

[0285] In response to the load decreasing to threshold value V3, the driving source is adjusted from driving gear D4 to driving gear D3.

[0286] In response to the load decreasing to threshold value V2, the driving source is adjusted from driving gear D3 to driving gear D2.

[0287] In response to the load decreasing to threshold value V1, the driving source is adjusted from driving gear D2 to driving gear D1.

[0288] In order to achieve the above-mentioned driving gear setting, the embodiment of the present application further provides a hydraulic driving device. The hydraulic driving device is used to realize the above-mentioned shearing control method. The hydraulic driving device has three hydraulic cylinders, and the three hydraulic cylinders cooperate to drive the moving tool holder 23.

[0289] Reference Figure 8 The hydraulic driving device comprises an eighth hydraulic cylinder 33, a ninth hydraulic cylinder 34, and a tenth hydraulic cylinder 35. The piston rod of the eighth hydraulic cylinder 33 is connected with the moving tool holder, the piston rod of the ninth hydraulic cylinder 34 is connected with the moving tool holder, and the piston rod of the tenth hydraulic cylinder 35 is connected with the moving tool holder.

[0290] The hydraulic driving device further comprises a seventh oil port A4 and an eighth oil port B4, and a twenty-fourth oil path 36 to a thirty-second oil path 44. The seventh oil port A4 and the eighth oil port B4 are used for oil inlet and oil return, one for oil inlet and one for oil return, and can be converted with each other.

[0291] The twenty-fourth oil path 36 connects the rodless cavity of the eighth hydraulic cylinder 33 to the seventh oil port A4.

[0292] The twenty-fifth oil path 37 connects the rod cavity of the eighth hydraulic cylinder 33 to the eighth oil port B4, and a fifteenth switch unit 371 is arranged on the twenty-fifth oil path 37.

[0293] The twenty-sixth oil path 38 connects the rodless cavity of the ninth hydraulic cylinder 34 to the seventh oil port A4.

[0294] The twenty-seventh oil path 39 connects the rod cavity of the ninth hydraulic cylinder 34 to the eighth oil port B4, and a sixteenth switch unit 391 is arranged on the twenty-seventh oil path 39.

[0295] The twenty-eighth oil path 40 connects the rodless cavity of the tenth hydraulic cylinder 35 to the seventh oil port A4.

[0296] The twenty-ninth oil path 41 connects the rod cavity of the tenth hydraulic cylinder 35 to the eighth oil port B4.

[0297] The thirtieth oil path 42 is connected between the rodless cavity and the rod cavity of the eighth hydraulic cylinder 33, and a seventeenth switch unit 421 is arranged on the thirtieth oil path 42.

[0298] The thirty-first oil path 43 is connected between the rodless cavity and the rod cavity of the ninth hydraulic cylinder 34, and an eighteenth switch unit 431 is arranged on the thirty-first oil path 43.

[0299] The thirty-second oil path 44 is connected between the rodless cavity and the rod cavity of the tenth hydraulic cylinder 35, and a nineteenth switch unit 441 is arranged on the thirty-second oil path 44.

[0300] The following will be based on the above-mentioned hydraulic structure, and the specific driving gear implementation will be specifically described.

[0301] For the drive gear D1, the three hydraulic cylinders are in differential mode. At this time, the seventeenth switch unit 421 is opened, the eighteenth switch unit 431 is opened, the nineteenth switch unit 441 is opened, the fifteenth switch unit 371 is closed, the sixteenth switch unit 391 is closed, the eighth oil port B4 is closed, and the seventh oil port A4 is in oil. The eighth hydraulic cylinder 33 is connected in differential through the thirtieth oil path 42, the ninth hydraulic cylinder 34 is connected in differential through the thirty-first oil path 43, and the tenth hydraulic cylinder 35 is connected in differential through the thirty-second oil path 44. The pressure oil is injected from the seventh oil port A4 to drive the eighth hydraulic cylinder 33 to advance in differential, the ninth hydraulic cylinder 34 to advance in differential, and the tenth hydraulic cylinder 35 to advance in differential.

[0302] For the drive gear D2, one of the hydraulic cylinders is in normal mode, and two of the hydraulic cylinders are in differential mode. At the drive gear D2, the seventeenth switch unit 421 is opened, the eighteenth switch unit 431 is opened, the nineteenth switch unit 441 is closed, the fifteenth switch unit 371 is closed, the sixteenth switch unit 391 is closed, the eighth oil port B4 is returned to oil, and the seventh oil port A4 is in oil. The eighth hydraulic cylinder 33 is connected in differential through the thirtieth oil path 42, and the ninth hydraulic cylinder 34 is connected in differential through the thirty-first oil path 43. The pressure oil is injected from the seventh oil port A4 to drive the eighth hydraulic cylinder 33 to advance in differential, the ninth hydraulic cylinder 34 to advance in differential, and the tenth hydraulic cylinder 35 to advance in normal mode.

[0303] For the drive gear D3, one of the hydraulic cylinders is in differential mode, and two of the hydraulic cylinders are in normal mode. The drive gear D3 includes two schemes: scheme one and scheme two. In scheme one, the eighth hydraulic cylinder 33 is in differential mode, the ninth hydraulic cylinder 34 is in normal mode, and the tenth hydraulic cylinder 35 is in normal mode. In scheme two, the eighth hydraulic cylinder 33 is in normal mode, the ninth hydraulic cylinder 34 is in differential mode, and the tenth hydraulic cylinder 35 is in normal mode.

[0304] For the scheme one of the drive gear D3, the seventeenth switch unit 421 is opened, the eighteenth switch unit 431 is closed, the nineteenth switch unit 441 is closed, the fifteenth switch unit 371 is closed, the sixteenth switch unit 391 is opened, the eighth oil port B4 is returned to oil, and the seventh oil port A4 is in oil. The eighth hydraulic cylinder 33 is connected in differential through the thirtieth oil path 42. The pressure oil is injected from the seventh oil port A4 to drive the eighth hydraulic cylinder 33 to advance in differential, the ninth hydraulic cylinder 34 to advance in normal mode, and the tenth hydraulic cylinder 35 to advance in normal mode.

[0305] For the second scheme of driving gear D3, the seventeenth switch unit 421 is closed, the eighteenth switch unit 431 is opened, the nineteenth switch unit 441 is closed, the fifteenth switch unit 371 is opened, the sixteenth switch unit 391 is closed, the eighth oil port B4 returns oil, and the seventh oil port A4 admits oil. The ninth hydraulic cylinder 34 is connected in differential through the thirty-first oil path 43. The pressure oil is injected from the seventh oil port A4 to drive the eighth hydraulic cylinder 33 to advance at full speed, the ninth hydraulic cylinder 34 to advance in differential, and the tenth hydraulic cylinder 35 to advance at full speed.

[0306] For the driving gear D4: all the three hydraulic cylinders are in the normal mode. Specifically, the seventeenth switch unit 421 is closed, the eighteenth switch unit 431 is closed, the nineteenth switch unit 441 is closed, the fifteenth switch unit 371 is opened, the sixteenth switch unit 391 is opened, the eighth oil port B4 returns oil, and the seventh oil port A4 admits oil. The pressure oil is injected from the seventh oil port A4 to drive the eighth hydraulic cylinder 33 to advance at full speed, the ninth hydraulic cylinder 34 to advance at full speed, and the tenth hydraulic cylinder 35 to advance at full speed.

[0307] In the above embodiment, by selecting different piston rod diameters, different tonnage ratio values can also be achieved, and the positions of the hydraulic valves are not necessarily at the top, and the installation positions are not limited.

[0308] In addition, it also needs to be understood that in some specific technical solutions, the driving gear D1 involved in the above part can also be used in the no-load stroke of the movable knife holder and the material. In some specific technical solutions, a fast forward gear different from the lowest driving gear D1 can also be separately arranged in the no-load stroke of the movable knife holder and the material for fast movement in the no-load stroke.

[0309] In medium and small load working conditions, only a small number of oil cylinders or a small working area of the oil cylinders are needed to output the shear force. Compared with the prior art, the action speed of the oil cylinder is faster under the same flow, and the working efficiency of the gantry shear machine is higher.

[0310] The present application proposes a shear control method that can match different loads. According to the load size, the output shear force size can be automatically adjusted through hydraulic oil path switching, so that the shear force of the gantry shear machine is divided into multiple gears to match different loads, to balance the driving efficiency and driving force peak value of the hydraulic cylinder, and to achieve faster working efficiency under the condition of sufficient driving force. When the shear load is small, only a small number of oil cylinders or a small working area of the oil cylinders are needed to output the shear force. Compared with the prior art, the action speed of the oil cylinder is faster under the same flow. When the load is large, the number of oil cylinders or the working area of the oil cylinders that output the shear force is gradually increased according to the need of the shear force.

[0311] Reference Figure 9This application also provides a shearing control device, comprising: the shearing control device being applied to a gantry shearing machine, the gantry shearing machine including a moving blade holder, a fixed blade holder, and a drive source for driving the moving blade holder, the moving blade holder being able to combine with the fixed blade holder under the drive source to shear materials; the shearing control device includes:

[0312] The detection module 701 is used to detect the load of the gantry shear during the shearing process;

[0313] The adjustment module 702 is used to adjust the drive gear of the drive source according to the load so that the drive gear of the drive source matches the size of the load; wherein the drive source has at least two drive gears, and different drive gears correspond to different peak values ​​of drive force, and the larger the load, the larger the peak value of drive force of the drive gear matched with it.

[0314] In one embodiment of this application, the drive source is composed of multiple hydraulic cylinders;

[0315] The adjustment module 702 specifically enables the following: changing the working mode of one or more hydraulic cylinders to adjust the drive gear; at least one hydraulic cylinder has two or three working modes among normal mode, differential mode, and follow-up mode, wherein, in normal mode, the hydraulic cylinder extends with oil entering the rodless chamber and returning oil to the rod chamber; in differential mode, based on normal mode, the oil in the rod chamber of the hydraulic cylinder flows back to the rodless chamber through a differential circuit; in follow-up mode, the piston rod of the hydraulic cylinder extends freely with the follower tool holder.

[0316] In one embodiment of this application, the drive source is provided with drive gears D1, ..., D2 in ascending order of peak driving force. n There are n drive levels in total, and threshold values ​​V1, ..., V are set sequentially according to the load from smallest to largest. n-1 There are a total of n-1 thresholds, where n≥2;

[0317] In one embodiment of this application, the adjustment module 702 includes:

[0318] The first regulation submodule is used to respond to an increase in load to a threshold V. i Change the drive source from drive gear D i Adjust to drive mode D i+1 ; where i takes the value of an integer from 1 to n-1.

[0319] In one embodiment of this application, the adjustment module 702 further includes:

[0320] The second regulation submodule is used in response to a load reduction to a threshold V. i Change the drive source from drive gear D i+1Adjusting to driving gear D i ; wherein i is an integer ranging from 1 to n-1.

[0321] In an embodiment of the present application, the driving source is composed of three hydraulic cylinders.

[0322] The driving gears of the driving source are specifically set as:

[0323] Driving gear D1: one of the hydraulic cylinders is in differential mode, and the other two are in follow-up mode.

[0324] Driving gear D2: one of the hydraulic cylinders is in normal mode, and the other two are in follow-up mode.

[0325] Driving gear D3: all the three hydraulic cylinders are in differential mode.

[0326] Driving gear D4: one of the hydraulic cylinders is in normal mode, and the other two are in differential mode; or, one of the hydraulic cylinders is in follow-up mode, and the other two are in normal mode.

[0327] Driving gear D5: one of the hydraulic cylinders is in differential mode, and the other two are in normal mode.

[0328] Driving gear D6: all the three hydraulic cylinders are in normal mode.

[0329] The adjusting module 702 comprises:

[0330] A first adjusting unit, configured to adjust the driving source from driving gear D1 to driving gear D2 in response to the load increasing to threshold value V1.

[0331] A second adjusting unit, configured to adjust the driving source from driving gear D2 to driving gear D3 in response to the load increasing to threshold value V2.

[0332] A third adjusting unit, configured to adjust the driving source from driving gear D3 to driving gear D4 in response to the load increasing to threshold value V3.

[0333] A fourth adjusting unit, configured to adjust the driving source from driving gear D4 to driving gear D5 in response to the load increasing to threshold value V4.

[0334] A fifth adjusting unit, configured to adjust the driving source from driving gear D5 to driving gear D6 in response to the load increasing to threshold value V5.

[0335] The adjusting module 702 further comprises:

[0336] A sixth adjusting unit, configured to adjust the driving source from driving gear D6 to driving gear D5 in response to the load decreasing to threshold value V5.

[0337] a seventh adjusting unit, configured to adjust the driving source from the driving gear D5 to the driving gear D4 in response to the load decreasing to a threshold V4;

[0338] an eighth adjusting unit, configured to adjust the driving source from the driving gear D4 to the driving gear D3 in response to the load decreasing to a threshold V3;

[0339] a ninth adjusting unit, configured to adjust the driving source from the driving gear D3 to the driving gear D2 in response to the load decreasing to a threshold V2;

[0340] a tenth adjusting unit, configured to adjust the driving source from the driving gear D2 to the driving gear D1 in response to the load decreasing to a threshold V1.

[0341] In an embodiment of the present application, the driving source is composed of two hydraulic cylinders;

[0342] The driving gears of the driving source are specifically set as:

[0343] the driving gear D1: both hydraulic cylinders are in differential mode;

[0344] the driving gear D2: one hydraulic cylinder is in normal mode and the other hydraulic cylinder is in differential mode;

[0345] the driving gear D3: both hydraulic cylinders are in normal mode;

[0346] The adjusting module 702 comprises:

[0347] an eleventh adjusting unit, configured to adjust the driving source from the driving gear D1 to the driving gear D2 in response to the load increasing to a threshold V1;

[0348] a twelfth adjusting unit, configured to adjust the driving source from the driving gear D2 to the driving gear D3 in response to the load increasing to a threshold V2;

[0349] The adjusting module 702 further comprises:

[0350] a thirteenth adjusting unit, configured to adjust the driving source from the driving gear D3 to the driving gear D2 in response to the load decreasing to a threshold V2;

[0351] a fourteenth adjusting unit, configured to adjust the driving source from the driving gear D2 to the driving gear D1 in response to the load decreasing to a threshold V1.

[0352] In an embodiment of the present application, the driving source is composed of two hydraulic cylinders;

[0353] The driving gears of the driving source are specifically set as:

[0354] Drive gear D1: one of the hydraulic cylinders is in differential mode, and one of the hydraulic cylinders is in follow-up mode;

[0355] Drive gear D2: one of the hydraulic cylinders is in normal mode, and one of the hydraulic cylinders is in follow-up mode; or both of the hydraulic cylinders are in differential mode;

[0356] Drive gear D3: one of the hydraulic cylinders is in normal mode, and one of the hydraulic cylinders is in differential mode;

[0357] Drive gear D4: both of the hydraulic cylinders are in normal mode;

[0358] The adjusting module 702 comprises:

[0359] A fifteenth adjusting unit is configured to adjust the driving source from the drive gear D1 to the drive gear D2 in response to the load increasing to the threshold value V1.

[0360] A sixteenth adjusting unit is configured to adjust the driving source from the drive gear D2 to the drive gear D3 in response to the load increasing to the threshold value V2.

[0361] A seventeenth adjusting unit is configured to adjust the driving source from the drive gear D3 to the drive gear D4 in response to the load increasing to the threshold value V3.

[0362] The adjusting module 702 comprises:

[0363] An eighteenth adjusting unit is configured to adjust the driving source from the drive gear D4 to the drive gear D3 in response to the load decreasing to the threshold value V3.

[0364] A nineteenth adjusting unit is configured to adjust the driving source from the drive gear D3 to the drive gear D2 in response to the load decreasing to the threshold value V2.

[0365] A twentieth adjusting unit is configured to adjust the driving source from the drive gear D2 to the drive gear D1 in response to the load decreasing to the threshold value V1.

[0366] In an embodiment of the present application, the driving source is composed of three hydraulic cylinders.

[0367] The drive gears of the driving source are specifically set as:

[0368] Drive gear D1: all of the three hydraulic cylinders are in differential mode;

[0369] Drive gear D2: one of the hydraulic cylinders is in normal mode, and two of the hydraulic cylinders are in differential mode;

[0370] Drive gear D3: one of the hydraulic cylinders is in differential mode, and two of the hydraulic cylinders are in normal mode;

[0371] Drive gear D4: all three hydraulic cylinders are in normal mode;

[0372] The adjusting module 702 comprises:

[0373] The twenty-first adjusting unit is configured to adjust the driving source from the drive gear D1 to the drive gear D2 in response to the load increasing to the threshold V1.

[0374] The twenty-second adjusting unit is configured to adjust the driving source from the drive gear D2 to the drive gear D3 in response to the load increasing to the threshold V2.

[0375] The twenty-third adjusting unit is configured to adjust the driving source from the drive gear D3 to the drive gear D4 in response to the load increasing to the threshold V3.

[0376] The adjusting module 702 comprises:

[0377] The twenty-fourth adjusting unit is configured to adjust the driving source from the drive gear D4 to the drive gear D3 in response to the load decreasing to the threshold V3.

[0378] The twenty-fifth adjusting unit is configured to adjust the driving source from the drive gear D3 to the drive gear D2 in response to the load decreasing to the threshold V2.

[0379] The twenty-sixth adjusting unit is configured to adjust the driving source from the drive gear D2 to the drive gear D1 in response to the load decreasing to the threshold V1.

[0380] The shearing control device provided in the embodiment corresponds to the shearing control method described in the foregoing part, and the related content can be referred to the description of the shearing control method in the foregoing part, which will not be repeated here.

[0381] The embodiment of the present application further provides a gantry shearing machine, which comprises a moving knife holder, a fixed knife holder, and a driving source for driving the moving knife holder, and the moving knife holder can be combined with the fixed knife holder to shear materials under the driving of the driving source. The gantry shearing machine further comprises a controller, which is used to realize the shearing control method described above.

[0382] Figure 10 is a schematic block diagram of the driving control part of the gantry shearing machine in the embodiment of the present application. The hydraulic driving device 802 drives the movement of the moving knife holder 23, and the controller 801 controls the power output of the hydraulic driving device 802 and switches the driving gears of the hydraulic driving device 802.

[0383] In the above embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0384] Furthermore, the terms "first", "second", etc. are used herein only to describe the different instances of the same feature and are not used to indicate or imply relative importance or a number of the indicated features. Thus, a feature defined with "first", "second", etc. can explicitly or implicitly include at least one of the feature. In the description of the application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise expressly specified.

[0385] The specific embodiments described herein are merely illustrative of the application and should not be considered limiting in any respect. Various modifications or substitutions of the specific embodiments described can be made by those skilled in the art without departing from the spirit of the application or the scope of the claims set forth below.

Claims

1. A method of shear control, characterized by, The shearing control method is applied to a gantry shearing machine, which comprises a movable knife holder, a fixed knife holder, and a driving source for driving the movable knife holder, and the movable knife holder can be combined with the fixed knife holder to shear materials under the driving of the driving source; The shearing control method comprises: detecting the load of the gantry shearing machine during shearing; adjusting the driving gear of the driving source according to the load, so that the driving gear of the driving source matches the size of the load; wherein the driving source has at least two driving gears, and different driving gears correspond to different driving force peaks of different sizes, and the greater the load, the greater the driving force peak of the driving gear matched therewith; The driving source is composed of multiple hydraulic cylinders; the adjustment of the driving gear of the driving source specifically comprises: changing the working mode of one or more hydraulic cylinders to realize the adjustment of the driving gear; at least one hydraulic cylinder has two or three working modes of normal mode, differential mode and follow-up mode, wherein the normal mode is a stretching driving mode in which the rodless cavity of the hydraulic cylinder is filled with oil and the rod cavity is returned to oil; in the differential mode, the oil in the rod cavity of the hydraulic cylinder is returned to the rodless cavity through the differential circuit on the basis of the normal mode; in the follow-up mode, the piston rod of the hydraulic cylinder freely stretches with the knife holder; The drive source is configured with drive gears D1, ..., D1 in ascending order of peak driving force. n There are n drive levels in total, and threshold values ​​V1, ..., V are set sequentially according to the load from smallest to largest. n-1 There are a total of n-1 thresholds, where n≥2; The adjustment of the driving gear of the driving source according to the load comprises: in response to the load increasing to the threshold value V i the drive source is shifted from the drive range D i to the drive range D i+1 ; wherein i is an integer ranging from 1 to n-1. The adjustment of the driving gear of the driving source according to the load further comprises: in response to the load decreasing to the threshold value V i the drive source is shifted from the drive range D i+1 to the drive range D i ; wherein i has a value that is an integer within the range of 1 to n-1.

2. The shear control method of claim 1, wherein, The driving source is composed of three hydraulic cylinders; The driving gear of the driving source is specifically set as: Driving gear D1: one of the hydraulic cylinders is in differential mode, and the other two hydraulic cylinders are in follow-up mode; Driving gear D2: one of the hydraulic cylinders is in normal mode, and the other two hydraulic cylinders are in follow-up mode; Driving gear D3: all the three hydraulic cylinders are in differential mode; Driving gear D4: one of the hydraulic cylinders is in normal mode, and the other two hydraulic cylinders are in differential mode; or, two of the hydraulic cylinders are in normal mode, and the other hydraulic cylinder is in follow-up mode; Driving gear D5: one of the hydraulic cylinders is in differential mode, and the other two hydraulic cylinders are in normal mode; Driving gear D6: all the three hydraulic cylinders are in normal mode; The adjustment of the driving gear of the driving source according to the load comprises: in response to the load increasing to a threshold value V1, adjusting the driving source from the driving gear D1 to the driving gear D2; in response to the load increasing to a threshold value V2, adjusting the driving source from the driving gear D2 to the driving gear D3; in response to the load increasing to a threshold value V3, adjusting the driving source from the driving gear D3 to the driving gear D4; in response to the load increasing to a threshold value V4, adjusting the driving source from the driving gear D4 to the driving gear D5; in response to the load increasing to a threshold value V5, adjusting the driving source from the driving gear D5 to the driving gear D6; The adjustment of the driving gear of the driving source according to the load further comprises: in response to the load decreasing to a threshold value V5, adjusting the driving source from the driving gear D6 to the driving gear D5; in response to the load decreasing to a threshold value V4, adjusting the driving source from the driving gear D5 to the driving gear D4; in response to the load decreasing to a threshold value V3, adjusting the driving source from the driving gear D4 to the driving gear D3; In response to the load decreasing to the threshold V2, the drive source is adjusted from drive gear D3 to drive gear D2; In response to the load decreasing to the threshold V1, the drive source is adjusted from drive position D2 to drive position D1.

3. The shear control method of claim 1, wherein, The drive source consists of two hydraulic cylinders; The specific drive level of the drive source is set as follows: Drive position D1: Both hydraulic cylinders are in differential mode; Drive gear D2: One hydraulic cylinder is in normal mode, and the other hydraulic cylinder is in differential mode; Drive gear D3: Both hydraulic cylinders are in normal mode; The step of adjusting the drive level of the drive source according to the load includes: In response to the load increasing to the threshold V1, the drive source is adjusted from drive gear D1 to drive gear D2; In response to the load increasing to the threshold V2, the drive source is adjusted from drive gear D2 to drive gear D3; The step of adjusting the drive level of the drive source according to the load further includes: In response to the load decreasing to the threshold V2, the drive source is adjusted from drive gear D3 to drive gear D2; In response to the load decreasing to the threshold V1, the drive source is adjusted from drive position D2 to drive position D1.

4. The shear control method of claim 1, wherein, The drive source consists of two hydraulic cylinders; The specific drive level of the drive source is set as follows: Drive position D1: One hydraulic cylinder is in differential mode and the other hydraulic cylinder is in follow-up mode; Drive gear D2: One hydraulic cylinder is in normal mode and the other is in follow-up mode; or both hydraulic cylinders are in differential mode. Drive gear D3: One hydraulic cylinder is in normal mode, and the other hydraulic cylinder is in differential mode; Drive position D4: Both hydraulic cylinders are in normal mode; The step of adjusting the drive level of the drive source according to the load includes: In response to the load increasing to the threshold V1, the drive source is adjusted from drive gear D1 to drive gear D2; In response to the load increasing to the threshold V2, the drive source is adjusted from drive gear D2 to drive gear D3; In response to the load increasing to the threshold V3, the drive source is adjusted from drive gear D3 to drive gear D4; The step of adjusting the drive level of the drive source according to the load further includes: In response to the load decreasing to the threshold V3, the drive source is adjusted from drive gear D4 to drive gear D3; In response to the load decreasing to the threshold V2, the drive source is adjusted from drive gear D3 to drive gear D2; In response to the load decreasing to the threshold V1, the drive source is adjusted from drive position D2 to drive position D1.

5. The shear control method of claim 1, wherein, The drive source consists of three hydraulic cylinders; The specific drive level of the drive source is set as follows: Drive position D1: All three hydraulic cylinders are in differential mode; Drive gear D2: One hydraulic cylinder is in normal mode, and the two hydraulic cylinders are in differential mode; Drive gear D3: One hydraulic cylinder is in differential mode, and both hydraulic cylinders are in normal mode; Drive gear D4: All three hydraulic cylinders are in normal mode; The step of adjusting the drive level of the drive source according to the load includes: In response to the load increasing to the threshold V1, the drive source is adjusted from drive gear D1 to drive gear D2; In response to the load increasing to the threshold V2, the drive source is adjusted from drive gear D2 to drive gear D3; In response to the load increasing to the threshold value V3, the driving source is adjusted from the driving gear D3 to the driving gear D4; The driving gear of the driving source is adjusted according to the load, and further comprising: In response to the load decreasing to the threshold value V3, the driving source is adjusted from the driving gear D4 to the driving gear D3; In response to the load decreasing to the threshold value V2, the driving source is adjusted from the driving gear D3 to the driving gear D2; In response to the load decreasing to the threshold value V1, the driving source is adjusted from the driving gear D2 to the driving gear D1.

6. A hydraulic drive apparatus characterized by comprising: The hydraulic driving device is used to realize the shearing control method as claimed in claim 2, and the hydraulic driving device comprises: a first oil port and a second oil port serving as oil inlet and oil return; a first hydraulic cylinder, the piston rod of which is connected to the movable tool holder; a second hydraulic cylinder, the piston rod of which is connected to the movable tool holder; a third hydraulic cylinder, the piston rod of which is connected to the movable tool holder; a first oil path connecting the rodless chamber of the first hydraulic cylinder to the first oil port; a second oil path connecting the rod chamber of the first hydraulic cylinder to the second oil port; a third oil path connecting the rodless chamber of the second hydraulic cylinder to the first oil port, and a first switch unit is arranged on the third oil path; a fourth oil path connecting the rod chamber of the second hydraulic cylinder to the second oil port, and a second switch unit is arranged on the fourth oil path; a fifth oil path connecting the rodless chamber of the third hydraulic cylinder to the first oil port, and a third switch unit is arranged on the fifth oil path; a sixth oil path connecting the rod chamber of the third hydraulic cylinder to the second oil port, and a fourth switch unit is arranged on the sixth oil path; a seventh oil path connected between the rodless chamber and the rod chamber of the first hydraulic cylinder, and a fifth switch unit is arranged on the seventh oil path; an eighth oil path connected between the rodless chamber and the rod chamber of the second hydraulic cylinder, and a sixth switch unit is arranged on the eighth oil path; a ninth oil path connected between the rodless chamber and the rod chamber of the third hydraulic cylinder, and a seventh switch unit is arranged on the ninth oil path; a tenth oil path connected between the rodless chamber of the second hydraulic cylinder and the oil tank, and a first liquid filling valve is arranged on the tenth oil path, and the oil inlet of the first liquid filling valve is arranged at one end of the oil tank, and the oil outlet is arranged at one end of the rodless chamber of the second hydraulic cylinder; an eleventh oil path connected between the rodless chamber of the third hydraulic cylinder and the oil tank, and a second liquid filling valve is arranged on the eleventh oil path, and the oil inlet of the second liquid filling valve is arranged at one end of the oil tank, and the oil outlet is arranged at one end of the rodless chamber of the third hydraulic cylinder.

7. A hydraulic drive apparatus characterized by comprising: The hydraulic driving device is used to realize the shearing control method as claimed in claim 3, and the hydraulic driving device comprises: a third oil port and a fourth oil port serving as oil inlet and oil return; a fourth hydraulic cylinder, the piston rod of which is connected to the movable tool holder; a fifth hydraulic cylinder, the piston rod of which is connected to the movable tool holder; a twelfth oil path connecting the rodless chamber of the fourth hydraulic cylinder to the third oil port; a thirteenth oil path connecting the rod chamber of the fourth hydraulic cylinder to the fourth oil port, and an eighth switch unit is arranged on the thirteenth oil path; a fourteenth oil path connecting the rodless chamber of the fifth hydraulic cylinder to the third oil port; a fifteenth oil path connecting the rod chamber of the fifth hydraulic cylinder to the fourth oil port; a sixteenth oil path connected between the rodless chamber and the rod chamber of the fourth hydraulic cylinder, and a ninth switch unit is arranged on the sixteenth oil path; a seventeenth oil path connected between the rodless chamber and the rod chamber of the fifth hydraulic cylinder, and a tenth switch unit is arranged on the seventeenth oil path.

8. A hydraulic drive apparatus characterized by comprising: The hydraulic driving device is used for realizing the shearing control method as claimed in claim 4, and comprises: a fifth oil port and a sixth oil port serving as an oil inlet and an oil outlet; a sixth hydraulic cylinder, the piston rod of which is connected with the movable blade holder; a seventh hydraulic cylinder, the piston rod of which is connected with the movable blade holder; an eighteenth oil path connecting the rodless chamber of the sixth hydraulic cylinder to the fifth oil port; a nineteenth oil path connecting the rod chamber of the sixth hydraulic cylinder to the sixth oil port; a twentieth oil path connecting the rodless chamber of the seventh hydraulic cylinder to the fifth oil port, and provided with an eleventh switch unit thereon; a twenty-first oil path connecting the rod chamber of the seventh hydraulic cylinder to the sixth oil port, and provided with a twelfth switch unit thereon; a twenty-second oil path connecting between the rodless chamber and the rod chamber of the sixth hydraulic cylinder, and provided with a thirteenth switch unit thereon; a twenty-third oil path connecting between the rodless chamber and the rod chamber of the seventh hydraulic cylinder, and provided with a fourteenth switch unit thereon; a thirty-third oil path connecting between the rodless chamber of the seventh hydraulic cylinder and the oil tank, and provided with a third liquid charging valve, and the oil inlet of the third liquid charging valve is provided with the oil tank at one end, and the oil outlet is provided at one end of the rodless chamber of the seventh hydraulic cylinder.

9. A hydraulic drive apparatus characterized by comprising: The hydraulic driving device is used for realizing the shearing control method as claimed in claim 5, and comprises: a seventh oil port and an eighth oil port serving as an oil inlet and an oil outlet; an eighth hydraulic cylinder, the piston rod of which is connected with the movable blade holder; a ninth hydraulic cylinder, the piston rod of which is connected with the movable blade holder; a tenth hydraulic cylinder, the piston rod of which is connected with the movable blade holder; a twenty-fourth oil path connecting the rodless chamber of the eighth hydraulic cylinder to the seventh oil port; a twenty-fifth oil path connecting the rod chamber of the eighth hydraulic cylinder to the eighth oil port, and provided with a fifteenth switch unit thereon; a twenty-sixth oil path connecting the rodless chamber of the ninth hydraulic cylinder to the seventh oil port; a twenty-seventh oil path connecting the rod chamber of the ninth hydraulic cylinder to the eighth oil port, and provided with a sixteenth switch unit thereon; a twenty-eighth oil path connecting the rodless chamber of the tenth hydraulic cylinder to the seventh oil port; a twenty-ninth oil path connecting the rod chamber of the tenth hydraulic cylinder to the eighth oil port; a thirtieth oil path connecting between the rodless chamber and the rod chamber of the eighth hydraulic cylinder, and provided with a seventeenth switch unit thereon; a thirty-first oil path connecting between the rodless chamber and the rod chamber of the ninth hydraulic cylinder, and provided with an eighteenth switch unit thereon; a thirty-second oil path connecting between the rodless chamber and the rod chamber of the tenth hydraulic cylinder, and provided with a nineteenth switch unit thereon.

10. A shear control device, characterized by, The shearing control device is applied to a gantry shearing machine, and the gantry shearing machine comprises a movable blade holder, a fixed blade holder, and a driving source for driving the movable blade holder, and the movable blade holder can be combined with the fixed blade holder under the driving of the driving source to shear materials; The shearing control device comprises: a detection module for detecting the load of the gantry shearing machine in the shearing process; an adjustment module for adjusting the driving gear of the driving source according to the load, so that the driving gear of the driving source matches the size of the load; wherein the driving source has at least two driving gears, and different driving gears correspond to different driving force peaks, and the greater the load, the greater the driving force peak of the driving gear matched therewith. ​ The driving source is composed of multiple hydraulic cylinders; the driving gear of the driving source is adjusted by changing the working mode of one or more hydraulic cylinders; at least one hydraulic cylinder has two or three working modes of normal mode, differential mode and follow-up mode, wherein the normal mode is a stretching driving mode with the rodless cavity of the hydraulic cylinder taking in oil and the rod cavity taking out oil; the differential mode is based on the normal mode, and the oil in the rod cavity of the hydraulic cylinder flows back to the rodless cavity through a differential circuit; in the follow-up mode, the piston rod of the hydraulic cylinder stretches freely with the knife holder following up; The drive source is configured with drive gears D1, ..., D1 in ascending order of peak driving force. n There are n drive levels in total, and threshold values ​​V1, ..., V are set sequentially according to the load from smallest to largest. n-1 There are a total of n-1 thresholds, where n≥2; The driving gear of the driving source is adjusted according to the load, comprising: in response to the load increasing to the threshold value V i the drive source is shifted from the drive range D i to the drive range D i+1 ; wherein i is an integer ranging from 1 to n-1. The driving gear of the driving source is adjusted according to the load, further comprising: in response to the load decreasing to the threshold value V i the drive source is shifted from the drive range D i+1 to the drive range D i ; wherein i has a value that is an integer in the range of 1 to n-1.

11. A portal shear comprising: The gantry shearing machine comprises a driving source, a movable knife holder and a fixed knife holder, wherein the movable knife holder can be combined with the fixed knife holder to shear materials under the driving of the driving source; The gantry shearing machine further comprises a controller, which is used to realize the shearing control method according to any one of claims 1-3.

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