A horizontal shearing machine with automatic shearing angle adjustment and a shearing angle adjustment control method thereof

Abstract

The present invention discloses a horizontal shearing machine with automatic adjustment of shearing angle and a shearing angle adjustment control method thereof, and belongs to the technical field of forging machine tools. The horizontal shearing machine with automatic adjustment of shearing angle of the present invention comprises a frame, wherein a tool holder and a workbench distributed in a horizontal direction are arranged in the frame, a static knife is arranged on the workbench, and a movable knife cooperating with the static knife is arranged on the tool holder, a side fulcrum is arranged on the left side of the frame, and the side fulcrum is connected to the roller through a disc spring, a guide plate is arranged correspondingly on the left side of the tool holder, and a first bonding plate and a second bonding plate are installed on the right side of the tool holder on the inner wall of the frame, and a first sensor, a second sensor and a third sensor are installed on the side fulcrum, the first bonding plate and the second bonding plate, respectively. The technical solution of the present invention can automatically adjust the shearing angle of the above-mentioned horizontal shearing machine, thereby ensuring the fixation of the shearing angle.

Description

Technical Field

[0001] The invention belongs to the technical field of shearing machines, and more specifically, relates to a horizontal shearing machine with automatic shearing angle adjustment and a shearing angle adjustment control method thereof. Background Art

[0002] Shearing machine is a kind of forging machine. It is a widely used equipment, mainly used in metal processing industry. It fixes the steel plate through the shearing machine press frame, and uses the relative movement between the upper and lower blades to apply shear force to metal plates of various thicknesses, so that the plates are broken and separated according to the required size. Shearing machine processing products are widely used in aviation, light industry, metallurgy, chemical industry, construction, shipbuilding, automobile, electricity, electrical appliances, decoration and other industries to provide the required special machinery and complete equipment.

[0003] The automobile beam is a U-shaped channel steel structure, and its two sides include a straight section and an inclined section, that is, its side is composed of two sides that are not in a straight line and are not parallel (i.e., a straight section and an inclined section, and there is an angle θ between the straight section and the inclined section). The existing shearing machine is usually a vertical structure. When using this vertical shearing machine to process U-shaped channel steel, it is necessary to first process the straight section on it, and then rotate the U-shaped channel steel at a certain angle, and then process the inclined section on it. Therefore, there are many processing steps, and the processing efficiency is low, which cannot meet the processing needs of enterprises.

[0004] Based on the above shortcomings, the applicant has developed a double-station horizontal shearing machine (application number 201010605818.8). This application optimizes the structure of the horizontal shearing machine. The shape of the fixed blade and the movable blade are consistent with the cut of the side of the U-shaped channel steel. Therefore, both sides of the U-shaped channel steel can be cut and formed at one time, with high cutting efficiency, without the need to readjust the position of the U-shaped channel steel. Figure 1 As shown, the moving knife of the horizontal shearing machine is spliced ​​by the first moving knife and the second moving knife to form a V-shaped structure, and there is a shearing angle α between the moving knife and the static knife. When the horizontal shearing machine is used to shear the two sides of the automobile beam, it is necessary to ensure that the above shearing angle does not change. If the shearing angle increases or decreases, the shearing force on both sides will be different, affecting the shearing effect, and the blade gap at the joint between the shearing surfaces of the two moving knives will change. The accuracy of the blade gap is already high. If the blade gap is too large, it will affect the quality of the sheared workpiece. If the blade gap is too small, it will directly damage the upper and lower sets of blades, and in serious cases, the machine may even be scrapped.

[0005] However, in actual applications, the shearing angle of the above-mentioned horizontal shearing machine may change due to various factors such as processing errors, thereby affecting the shearing quality and the service life of the blade. Summary of the invention

[0006] 1. Technical problem to be solved by the invention

[0007] The purpose of the present invention is to overcome the problem that when a horizontal shearing machine is used to process the wing surfaces on both sides of an automobile beam, the shearing angle of the blade is easily changed, thereby affecting the shearing quality, and to provide a horizontal shearing machine with automatic shearing angle adjustment and a shearing angle adjustment control method thereof. The technical solution of the present invention can automatically adjust the shearing angle of the horizontal shearing machine, thereby ensuring that the shearing angle is fixed.

[0008] 2. Technical solution

[0009] In order to achieve the above object, the technical solution provided by the present invention is:

[0010] A horizontal shearing machine with automatic shearing angle adjustment of the present invention comprises a frame, wherein a tool holder and a workbench distributed in a horizontal direction are arranged in the frame, a static knife is arranged on the workbench, and a movable knife cooperating with the static knife is arranged on the tool holder, a side fulcrum is arranged on the left side of the frame, the side fulcrum is connected to a roller through a disc spring, a guide plate is correspondingly arranged on the left side of the tool holder, a first bonding plate and a second bonding plate are installed on the right side of the tool holder on the inner wall of the frame, and a first sensor, a second sensor and a third sensor are respectively installed on the side fulcrum, the first bonding plate and the second bonding plate.

[0011] Furthermore, the first sensor is located on the central axis of the second sensor and the third sensor.

[0012] Furthermore, the first sensor, the second sensor and the third sensor are all connected to an electrical control system.

[0013] Furthermore, the two ends of the tool holder are respectively connected to the main oil cylinder and the auxiliary oil cylinder. Specifically, two sets of tool holders and moving tool groups are symmetrically distributed on both sides of the workbench, wherein the two ends of the left tool holder are respectively connected to the left main cylinder and the left auxiliary cylinder, and the two ends of the right tool holder are respectively connected to the right main cylinder and the right auxiliary cylinder.

[0014] Furthermore, the hydraulic system of the shearing machine includes an oil tank, an oil pump and an electro-hydraulic reversing valve, wherein the oil inlet of the oil pump is connected to the oil tank, and the oil outlet thereof is connected to the P port of the electro-hydraulic reversing valve on the one hand, and is connected to the oil tank through an electromagnetic overflow valve on the other hand; the A port of the electro-hydraulic reversing valve is connected to the rodless chamber of the left master cylinder, and the B port is connected to the rodless chamber of the right master cylinder, the rod chambers of the left master cylinder and the right master cylinder are respectively connected to the rodless chambers of the left auxiliary cylinder and the right auxiliary cylinder, and the rod chambers of the left auxiliary cylinder and the right auxiliary cylinder are respectively connected to the first electromagnetic reversing valve and the second electromagnetic reversing valve.

[0015] Furthermore, a needle valve and an accumulator are provided on the pipeline between the oil outlet of the oil pump and the rod chambers of the left and right auxiliary cylinders; the oil outlet of the oil pump is also connected to the oil inlets of the first solenoid reversing valve and the second solenoid reversing valve, respectively, the oil control port of the first solenoid reversing valve is connected to the rod chamber of the left master cylinder and the rodless chamber of the left auxiliary cylinder, and the oil control port of the second solenoid reversing valve is connected to the rod chamber of the right master cylinder and the rodless chamber of the right auxiliary cylinder.

[0016] Furthermore, the A-port pipeline of the electro-hydraulic reversing valve is connected to the upper left material pressing cylinder and the left material pressing cylinder, and the B-port pipeline is connected to the upper right material pressing cylinder and the right material pressing cylinder.

[0017] The present invention provides a shearing angle adjustment and control method for a shearing machine, and its specific process is: placing a workpiece to be sheared on a stationary knife on a workbench, pushing a roller to the right through a side fulcrum to make the tool holder as a whole to fit rightwardly with a first bonding plate and a second bonding plate on the right inner wall of the tool holder, and driving the tool holder to perform horizontal cutting movement along the bonding plates through a main oil cylinder and a secondary oil cylinder. At the same time, during the cutting process, it is detected whether the tool holder is in a horizontal state, and the hydraulic system is controlled according to the detection result to achieve horizontal adjustment of the tool holder and control of the shearing angle.

[0018] Furthermore, the distance between the second sensor and the third sensor and the first sensor is measured to detect whether the tool holder is in a horizontal state.

[0019] Furthermore, when the tool holder tilts to the left, that is, the shear angle on the left side is greater than the shear angle on the right side, the second sensor detects that the first bonding plate is not bonded to the frame. At this time, the hydraulic system is controlled to perform the following actions: the motor oil pump is started, YV1 and YV4 are energized, and the control port of the electromagnetic overflow valve is not connected to the oil tank and acts as an ordinary overflow valve. The first electromagnetic reversing valve connects the oil circuit, and the oil supplied by the oil pump directly enters the lower chamber of the left main cylinder and the upper chamber of the left auxiliary cylinder through the first electromagnetic reversing valve, thereby replenishing oil and adjusting the tool holder.

[0020] Furthermore, when the tool holder tilts to the right, that is, the shear angle on the right is greater than the shear angle on the left, the third sensor detects that the first bonding plate is not bonded to the frame, and the hydraulic system is controlled to perform the following actions: start the motor oil pump, YV4 is energized, and the first solenoid reversing valve connects the lower chamber of the left main cylinder and the upper chamber of the left auxiliary cylinder to drain oil and adjust the tool holder.

[0021] 3. Beneficial effects

[0022] Compared with the prior art, the technical solution provided by the present invention has the following significant effects:

[0023] (1) The horizontal shearing machine with automatic shearing angle adjustment of the present invention has a side support point on the left side of the frame, and the roller pushes the guide plate by pushing the side support point, so that the tool holder can be pressed against the first bonding plate and the second bonding plate to the right, and horizontal shearing is performed along the first bonding plate and the second bonding plate, which is beneficial to improve the overall stability of the tool holder and prevent it from tilting. At the same time, according to the distance between the second sensor and the third sensor and the first sensor, it can be judged whether the tool holder is in a horizontal state, and then when the tool holder tilts, the hydraulic system can be controlled to operate to adjust the tool holder and ensure the fixity of the shearing angle.

[0024] (2) The horizontal shearing machine with automatic shearing angle adjustment of the present invention can meet the shearing requirements of the horizontal double-station shearing machine by optimizing the design of the hydraulic system, and can control the four actions of shearing and return of the left and right groups of cylinders respectively through a group of motor oil pumps and a three-position four-way valve (electro-hydraulic reversing valve). The hydraulic system has a simple structure and low cost, and realizes the precise shearing processing of the left and right sides of the automobile frame by the horizontal shearing machine.

[0025] (3) The horizontal shearing machine with automatic shearing angle adjustment of the present invention uses an accumulator to supply the return force of the left and right groups of cylinders, thereby effectively ensuring that the return force of the two groups of cylinders is the same, thereby ensuring that the operation of the equipment is more coordinated and reliable; in addition, the present invention optimizes the structure of the hydraulic system to ensure that the shearing work of the two groups of cylinders is not carried out at the same time, and has an interlocking function, which is beneficial to ensuring the shearing effect on the one hand, and can also effectively prevent the return of the cylinder from being affected by insufficient oil supply from the accumulator on the other hand.

[0026] (4) The horizontal shearing machine with automatic adjustment of shearing angle of the present invention has upper and side pressure cylinders for positioning the workpiece to be sheared in two directions during shearing operation of the left and right groups of oil cylinders, and the upper surface is pressed first and then the side surface during pressure, and the tool holder does not shear until the side pressure is in place, thereby effectively improving the firmness of the workpiece during shearing and facilitating the shearing quality. At the same time, when the right tool holder needs to shear, the left tool holder returns first, and the right tool holder does not start shearing until the upper right pressure cylinder and the right side pressure cylinder are in place, thereby satisfying the order of return first and then shearing.

[0027] (5) The shearing angle adjustment control method of the shearing machine of the present invention optimizes the structure of the shearing machine and cooperates with the hydraulic system to adjust the shearing angle of the shearing machine according to the situation to ensure the fixity of the shearing angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a horizontal shearing machine with automatic shearing angle adjustment according to the present invention;

[0029] Figure 2 It is a structural schematic diagram of the hydraulic system of the present invention.

[0030] Explanation of the numbers in the figure:

[0031] 1. Frame; 201. Left main cylinder; 202. Left auxiliary cylinder; 301. Right main cylinder; 302. Right auxiliary cylinder; 4. Tool holder; 501. Left movable knife; 502. Right movable knife; 601. Left static knife; 602. Right static knife; 7. Workbench; 8. Side fulcrum; 9. Disc spring; 10. Roller; 11. Guide plate; 12. First sensor; 1301. Second sensor; 1302. Third sensor; 1401. First bonding plate; 1402 , the second bonding plate; 15, oil tank; 16, oil pump; 17, pressure gauge; 1801, upper left pressing cylinder; 1802, upper right pressing cylinder; 19, electromagnetic overflow valve; 20, electro-hydraulic reversing valve; 2101, first one-way sequence valve; 2102, second one-way sequence valve; 2201, left pressing cylinder; 2202, right pressing cylinder; 23, first electromagnetic reversing valve; 24, second electromagnetic reversing valve; 25, needle valve; 26, accumulator. DETAILED DESCRIPTION

[0032] In order to further understand the content of the present invention, the present invention is now described in detail in conjunction with the accompanying drawings and specific embodiments.

[0033] Example 1

[0034] like Figure 1 As shown, a horizontal shearing machine with automatic shearing angle adjustment in this embodiment includes a frame 1, in which a tool holder 4 and a workbench 7 distributed in a horizontal direction are provided, the workbench 7 is provided with stationary knives (left stationary knife 601 and right stationary knife 602), and the tool holder 4 is provided with movable knives (left movable knife 501 and right movable knife 502) cooperating with the stationary knives, a side fulcrum 8 is provided on the left side of the frame 1, and the side fulcrum 8 is connected to the roller 10 through a disc spring 9, a guide plate 11 is correspondingly provided on the left side of the tool holder 4, and a first laminating plate 1401 and a second laminating plate 1402 are installed on the right side of the tool holder 4 on the inner wall of the frame 1, and a first sensor 12, a second sensor 1301 and a third sensor 1302 are respectively installed on the side fulcrum 8, the first laminating plate 1401 and the second laminating plate 1402. The first sensor 12 is located on the central axis of the second sensor 1301 and the third sensor 1302 , and the first sensor 12 , the second sensor 1301 and the third sensor 1302 are all connected to the electrical control system.

[0035] In this embodiment, a side fulcrum 8 is provided on the left side of the frame 4, and the roller 10 pushes the guide plate by pushing the side fulcrum 8, so that the tool holder 4 can be pressed against the first bonding plate 1401 and the second bonding plate 1402 to the right, and horizontal shearing is performed along the first bonding plate 1401 and the second bonding plate 1402, thereby improving the overall stability of the tool holder 4 and preventing it from tilting. At this time, the shearing angle α between the left movable knife 501 and the left static knife 601 is the same as the shearing angle between the right static knife 602 and the right movable knife 502, and the force for shearing the sheet material is also the same.

[0036] But if the left and right cylinders (here refers to Figure 1 The left and right directions in the figure (actually the upper and lower positions of the tool holder connected to the main cylinder and the auxiliary cylinder) are inconsistent, which will cause the tool holder to be non-parallel, so that the two laminating plates on the right side of the tool holder cannot be fully attached to the frame, and the moving blade will be offset, resulting in changes in the blade gap. If the offset is too large, the blade gap will be misaligned and the blade will be damaged. In serious cases, the machine may even be scrapped. Since the horizontal shearing machine uses a hydraulic cylinder as the shearing power, the shearing angle will change during the shearing process due to various factors, such as oil leakage from the lower chamber of the main cylinder to the upper chamber of the auxiliary cylinder, or oil leakage from the upper and lower chambers of the two cylinders at the same time.

[0037] Based on the above problems, this embodiment uses three sensors to determine whether the tool holder is in a horizontal state based on the distance between the second sensor 1301 and the third sensor 1302 and the first sensor. Then, when the tool holder is tilted, the hydraulic system can be controlled (oil replenishment and oil discharge control of different cylinders) to adjust the tool holder and ensure the fixity of the shearing angle.

[0038] Example 2

[0039] The horizontal shearing machine with automatic shearing angle adjustment of the present embodiment has a structure basically the same as that of the first embodiment, and the main difference is that the two ends of the tool holder 4 of the present embodiment are respectively connected to the main oil cylinder and the auxiliary oil cylinder. Specifically, two sets of tool holders 4 and moving knife groups are symmetrically distributed on both sides of the workbench 7 of the present embodiment, wherein the two ends of the left tool holder 4 are respectively connected to the left main cylinder 201 and the left auxiliary cylinder 202, and the two ends of the right tool holder 4 are respectively connected to the right main cylinder 301 and the right auxiliary cylinder 302. Figure 1 Only one side of the tool holder is shown.

[0040] Combination Figure 2The hydraulic system of the shearing machine includes an oil tank 15, an oil pump 16 and an electro-hydraulic reversing valve 20, wherein the oil inlet of the oil pump 16 is connected to the oil tank 15, and the oil outlet thereof is connected to the P port of the electro-hydraulic reversing valve 20 on one hand, and is connected to the oil tank 15 through the electromagnetic overflow valve 19 on the other hand. The A port of the electro-hydraulic reversing valve 20 is connected to the rodless cavity of the upper left pressing cylinder 1801, the first one-way sequence valve 2101, the left pressing cylinder 2201 and the left master cylinder 201, the B port thereof is connected to the rodless cavity of the upper right pressing cylinder 1802, the second one-way sequence valve 2102, the right pressing cylinder 2202 and the right master cylinder 301, and the T port thereof is connected to the oil tank. The rod chambers of the left master cylinder 201 and the right master cylinder 301 are respectively connected to the rodless chambers of the left auxiliary cylinder 202 and the right auxiliary cylinder 302, and the rod chambers of the left auxiliary cylinder 202 and the right auxiliary cylinder 302 are respectively connected to the first electromagnetic reversing valve 23 and the second electromagnetic reversing valve 24, and are connected to the oil inlet of the electromagnetic overflow valve 19 through the needle valve 25. An accumulator 26 is also provided on the pipeline between the oil outlet of the oil pump 16 and the rod chambers of the left auxiliary cylinder 202 and the right auxiliary cylinder 302. The above-mentioned pressing cylinders are all self-resetting spring cylinders, and the filling pressure of the accumulator 26 is greater than the spring reset force of the left pressing cylinder and the right pressing cylinder.

[0041] The oil outlet of the oil pump 16 is also connected to the oil inlet of the first electromagnetic reversing valve 23 and the second electromagnetic reversing valve 24 respectively. The oil control port of the first electromagnetic reversing valve 23 is connected to the rod chamber of the left master cylinder 201 and the rodless chamber of the left auxiliary cylinder 202. The oil control port of the second electromagnetic reversing valve 24 is connected to the rod chamber of the right master cylinder 301 and the rodless chamber of the right auxiliary cylinder 302. The oil outlets of the first electromagnetic reversing valve 23 and the second electromagnetic reversing valve 24 are both connected to the oil tank. The oil pump 16 is connected to the motor, and its oil outlet is connected to the pressure gauge 17 and the pressure gauge switch.

[0042] Example 3

[0043] A horizontal shearing machine with automatic shearing angle adjustment in this embodiment has the same structure as that in embodiment 2. The shearing angle adjustment control method in this embodiment has the following specific process: placing the workpiece to be sheared on the stationary knife of the workbench, pushing the roller 10 to the right through the side fulcrum 8, so that the tool holder 4 as a whole is bonded to the right with the first bonding plate 1401 and the second bonding plate 1402 on the right inner wall of the tool holder, and driving the tool holder 4 to perform horizontal cutting movement along the bonding plates through the left cylinder 2 and the right cylinder 3. At the same time, during the cutting process, it is detected whether the tool holder 4 is in a horizontal state (the distance between the second sensor 1301 and the third sensor 1302 and the first sensor 12 is sensed and measured to detect whether the tool holder is in a horizontal state), and the hydraulic system is controlled according to the detection result (the oil replenishment and oil discharge operations of different cylinders are realized) to realize the horizontal adjustment of the tool holder and the control of the shearing angle.

[0044] Specifically, when the piston of the main cylinder is lower than the piston of the auxiliary cylinder (here, the left side of the tool holder is tilted, that is, the piston of the left main cylinder 201 is lower than the piston of the left auxiliary cylinder 202), the tool holder 4 is tilted to the left (the left side is lower than the right side), that is, the shear angle on the left side is greater than the shear angle on the right side. The second sensor 1301 detects that the first bonding plate 1401 is not bonded to the frame. At this time, the hydraulic system is controlled to perform the following actions: start the motor oil pump, YV1 and YV4 are energized, and the control port of the electromagnetic overflow valve 19 is not connected to the oil tank and acts as an ordinary overflow valve. The first electromagnetic reversing valve 23 connects the oil circuit, and the oil supplied by the oil pump 16 directly enters the lower chamber of the left master cylinder 201 and the upper chamber of the left auxiliary cylinder 202 through the first electromagnetic reversing valve 23 to replenish oil and adjust the tool holder 4.

[0045] When the tool holder tilts to the right, that is, the shear angle on the right is greater than the shear angle on the left, the third sensor 1302 detects that the first bonding plate 1402 is not bonded to the frame, and the hydraulic system is controlled to perform the following actions: the motor oil pump is started, YV4 is energized, and the first solenoid reversing valve 23 connects the lower chamber of the left master cylinder 201 and the upper chamber of the left auxiliary cylinder 202 to drain oil and adjust the tool holder.

[0046] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A horizontal shearing machine with automatically adjusted shearing angle, comprising a frame (1), wherein a knife holder (4) and a workbench (7) are arranged in the frame (1), the workbench (7) is provided with a stationary knife, and the knife holder (4) is provided with a movable knife cooperating with the stationary knife, characterized in that: A side support (8) is provided on the left side of the frame (1), and the side support (8) is connected to the roller (10) via a disc spring (9); a guide plate (11) is correspondingly provided on the left side of the tool holder (4); a first laminating plate (1401) and a second laminating plate (1402) are installed on the right side of the tool holder (4) on the inner wall of the frame (1); a first sensor (12), a second sensor (1301) and a third sensor (1302) are installed on the side support (8), the first laminating plate (1401) and the second laminating plate (1402) respectively; the first sensor (12) is located on the central axis of the second sensor (1301) and the third sensor (1302); Two sets of tool holders (4) and moving knife groups are symmetrically arranged on both sides of the workbench (7), and the two moving knives are spliced ​​to form a V-shaped structure; wherein the two ends of the left tool holder (4) are respectively connected to the left main cylinder (201) and the left auxiliary cylinder (202), and the two ends of the right tool holder (4) are respectively connected to the right main cylinder (301) and the right auxiliary cylinder (302); The hydraulic system of the plate shearing machine comprises an oil tank (15), an oil pump (16) and an electro-hydraulic reversing valve (20), wherein the oil inlet of the oil pump (16) is connected to the oil tank (15), and the oil outlet of the oil pump (16) is connected to the P port of the electro-hydraulic reversing valve (20) on the one hand, and is connected to the oil tank (15) through an electromagnetic overflow valve (19) on the other hand; the A port of the electro-hydraulic reversing valve (20) is connected to the rodless chamber of the left master cylinder (201), and the B port is connected to the rodless chamber of the right master cylinder (301); the rod chambers of the left master cylinder (201) and the right master cylinder (301) are respectively connected to the rodless chambers of the left auxiliary cylinder (202) and the right auxiliary cylinder (302), and the rod chambers of the left auxiliary cylinder (202) and the right auxiliary cylinder (302) are respectively connected to the first electromagnetic reversing valve (23) and the second electromagnetic reversing valve (24).

2. A horizontal shearing machine with automatic shearing angle adjustment according to claim 1, characterized in that: The first sensor (12), the second sensor (1301) and the third sensor (1302) are all connected to the electrical control system.

3. A horizontal shearing machine with automatic shearing angle adjustment according to claim 1 or 2, characterized in that: A needle valve (25) and an accumulator (26) are also provided on the pipeline between the oil outlet of the oil pump (16) and the rod chambers of the left auxiliary cylinder (202) and the right auxiliary cylinder (302); the oil outlet of the oil pump (16) is also connected to the oil inlets of the first electromagnetic reversing valve (23) and the second electromagnetic reversing valve (24), respectively; the oil control port of the first electromagnetic reversing valve (23) is connected to the rod chamber of the left master cylinder (201) and the rodless chamber of the left auxiliary cylinder (202); the oil control port of the second electromagnetic reversing valve (24) is connected to the rod chamber of the right master cylinder (301) and the rodless chamber of the right auxiliary cylinder (302).

4. A shearing angle adjustment control method for a shearing machine, characterized in that: A horizontal shearing machine according to any one of claims 1 to 3 is used, and its specific process is as follows: placing the workpiece to be sheared on the static knife of the workbench, pushing the roller (10) to the right through the side fulcrum (8), so that the tool holder (4) as a whole is attached to the first bonding plate (1401) and the second bonding plate (1402) on the right inner wall of the tool holder to the right, and driving the tool holder (4) to perform horizontal cutting movement along the bonding plates through the main cylinder and the auxiliary cylinder. At the same time, during the cutting process, the tool holder (4) is detected to be in a horizontal state, and the hydraulic system is controlled according to the detection result to realize the horizontal adjustment of the tool holder and the control of the shearing angle; specifically, When the tool holder (4) tilts to the left, that is, the shearing angle on the left side is greater than the shearing angle on the right side, the second sensor (1301) detects that the first bonding plate (1401) is not bonded to the frame, and the hydraulic system is controlled to perform the following actions: the motor oil pump is started, YV1 and YV4 are energized, and the control port of the electromagnetic overflow valve (19) is not connected to the oil tank and acts as a common overflow valve. The first electromagnetic reversing valve (23) is connected to the oil circuit, and the oil supplied by the oil pump (16) directly enters the lower chamber of the left main cylinder (201) and the upper chamber of the left auxiliary cylinder (202) through the first electromagnetic reversing valve (23), thereby replenishing oil and adjusting the tool holder (4); When the tool holder tilts to the right, that is, the shear angle on the right is greater than the shear angle on the left, the third sensor (1302) detects that the second bonding plate (1402) is not bonded to the frame, and the hydraulic system is controlled to perform the following actions: the motor oil pump is started, YV4 is energized, and the first electromagnetic reversing valve (23) is connected to the lower chamber of the left main cylinder (201) and the upper chamber of the left auxiliary cylinder (202) to discharge oil and adjust the tool holder.

5. A shearing angle adjustment control method for a shearing machine according to claim 4, characterized in that: The distance between the second sensor (1301) and the third sensor (1302) and the first sensor (12) is measured to detect whether the tool holder is in a horizontal state.

Images