CN219703664U - Control system of parallel blade shearing machine - Google Patents

Abstract

The utility model discloses a control system for a parallel blade shearing machine, which relates to the field of hydraulic control technology and specifically includes a quantitative feeding circuit, a locking circuit, a shearing circuit and a main oil circuit. The main oil circuit includes an electric motor and an electric motor. A variable hydraulic pump connected to the output shaft, an oil tank connected to the oil inlet of the variable hydraulic pump through a main oil inlet pipe, and a main oil outlet pipe connected to the oil outlet of the variable hydraulic pump. One end of the main oil outlet pipe is provided with a first one-way valve. . The control system of the parallel blade shearing machine balances the dead weight generated by the piston of the shearing cylinder through the setting of the one-way throttle valve to avoid oscillation during operation, thereby eliminating the vibration at the two stroke end points of the shearing cylinder. The displacement error improves the processing accuracy of the system; through the setting of the one-way quantitative hydraulic motor, the system can accurately control the moving distance of the material, allowing the parallel blade shearing machine to quantitatively cut and improve the cutting accuracy.

Description

A control system for parallel blade shearing machine

Technical field

The utility model relates to the field of hydraulic control technology, specifically a control system for a parallel blade shearing machine.

Background technique

In recent years, with the improvement of people's living standards, the number of various small-scale construction projects has increased year by year. The advantages of small and medium-sized shearing machines, such as small size, flexibility and ease of use, have gradually become prominent. Parallel blade shearing machines are small and medium-sized shearing machines. A type of machine often used to cut blanks. In the existing technology, the authorized patent with application number CN201420448172.0 proposes a high-quality shearing machine, which includes a base, a workbench, a bracket and a cutter connected between the brackets. The front end of the shearing machine is also provided with Straightening and leveling device and guide and positioning device, wherein the straightening and leveling device is composed of two rows of rollers up and down, and the guide and positioning device includes rollers and screw rods; press blocks are provided on both sides of the cutter; shearing There is a guide rail at the rear end of the shearing machine; there are also control systems, servo motors and hydraulic motors on both sides of the shearing machine.

When the above scheme is used, the sheared plates are of good quality, have good straightness and parallelism, are anti-distortion, and have no curling, corner curling or unevenness in the middle. However, due to the use of limit bars to control the blank Positioning, after the blank is cut, the limit strip will prevent the finished product from continuing to move. Therefore, it is necessary to move the limit strip or the cut product through a power structure so that the blank to be cut can be sent to the shearing position for the next cut. Shearing, resulting in a long time interval between two adjacent shears, and the power structure needs to work non-stop, which reduces the working efficiency of the above-mentioned shearing machine and increases its energy consumption. Therefore, it is necessary to design a high-efficiency shearing machine. , low energy consumption shearing machine.

Utility model content

The utility model provides a control system for a parallel-blade shearing machine, which solves the problems of long intervals between two adjacent shears proposed in the above-mentioned background technology, low efficiency, and the need to use a power structure to move the limit strip or the The finished product is moved away from the cutting position, which increases the energy consumption of the equipment.

The utility model provides the following technical solution: a control system for a parallel-blade shearing machine, which is designed with a one-way quantitative hydraulic motor, which can accurately control the shearing length of the material. The parallel-blade shearing machine does not need to use a limiter when in use. The position bar positions the material so that the subsequently transferred material can directly push down the cut material, omitting the step of transferring the limit bar or cutting the finished product in the cutting position, reducing the energy consumption of the parallel blade shearing machine. Moreover, the interval time between two adjacent cuts is shortened, and the cutting efficiency of the parallel blade shearing machine is improved.

A control system for a parallel blade shearing machine, including a quantitative feeding circuit, a locking circuit, a shearing circuit and a main oil circuit. The main oil circuit includes a motor, a variable hydraulic pump connected to the output shaft of the motor, and a variable hydraulic pump. The oil inlet is connected to a tank through a main oil inlet pipe and a main oil outlet pipe connected to the oil outlet of the variable hydraulic pump. One end of the main oil outlet pipe is provided with a first one-way valve;

The quantitative feeding circuit includes a one-way quantitative hydraulic motor, a first electromagnetic reversing valve connected to the oil inlet of the one-way quantitative hydraulic motor, and two first relief valves. The other end of the first electromagnetic reversing valve is connected to the oil inlet of the one-way quantitative hydraulic motor. The main oil outlet pipe is connected through a first oil outlet branch pipe. The oil inlet and oil outlet of the one-way quantitative hydraulic motor are both connected to a first return pipe. The other end of the first return pipe is connected to the oil tank. One end of the first return pipe is provided with a first overflow valve;

The locking circuit includes an upper pressure circuit connected to the main oil outlet pipe through the second oil outlet branch pipe and a lower pressure circuit connected to the main oil outlet pipe through the third oil outlet branch pipe; the lower pressure circuit includes a material holding cylinder, and a support holding cylinder. A second electromagnetic reversing valve and a two-position electro-hydraulic reversing valve are connected to the oil inlet of the material cylinder. Both the second electromagnetic reversing valve and the two-position electro-hydraulic reversing valve are connected to the third oil outlet branch pipe. End connection, one end of the third oil outlet branch pipe is connected with a pressure gauge;

The shearing circuit includes a fourth oil outlet branch pipe connected to the main oil outlet pipe, a three-position four-way electro-hydraulic reversing valve connected to the fourth oil outlet pipe, and a shearing cylinder connected to the three-position four-way electro-hydraulic reversing valve. A second hydraulically controlled one-way valve and one-way throttle valve are provided between the three-position four-way electro-hydraulic directional valve and the oil outlet of the shearing cylinder.

Preferably, the upper pressure circuit includes a compression cylinder and a three-position four-way electromagnetic reversing valve. The oil inlet and outlet of the compression cylinder are connected to the second oil outlet branch pipe through the three-position four-way electromagnetic reversing valve. One end away from the main oil outlet pipe is connected. A first hydraulic control check valve is provided between the oil inlet of the compression cylinder and the three-position four-way electromagnetic reversing valve. The three-position four-way electromagnetic reversing valve is connected to the oil tank. A fifth return pipe is provided between them, and a fifth overflow valve is provided at the end of the fifth return pipe.

Preferably, the first electromagnetic directional valve and the second electromagnetic directional valve are both two-position three-way electromagnetic directional valves.

Preferably, a second return pipe is provided between the oil inlet of the compression cylinder and the first hydraulic control check valve and between the oil outlet of the compression cylinder and the three-position four-way electromagnetic reversing valve, so The other end of the second return pipe is connected to the fuel tank, and one end of the second return pipe is provided with a second overflow valve.

Preferably, the one-way throttle valve is away from the three-position four-way electro-hydraulic directional valve, and a third return pipe is provided between the oil outlet of the shear cylinder and the one-way throttle valve. The third return pipe The other end of the third return pipe is connected to the fuel tank, and one end of the third return pipe is provided with a third overflow valve.

Preferably, a filter is provided at one end of the main oil inlet pipe.

Preferably, the oil inlet and outlet of the material support cylinder, the end of the third oil outlet branch away from the main oil outlet pipe, and the end of the second electromagnetic reversing valve are all connected to a fourth return pipe, and the fourth return pipe is The other end is connected to the oil tank, and one end of the fourth return pipe is fixedly connected to a fourth overflow valve.

Compared with the existing technology, this utility model has the following beneficial effects:

1. The control system of this parallel blade shearing machine, through the setting of the locking circuit, can fix the top and bottom of the material at the same time, so that the material can remain stable during shearing, and the transfer limit strip or during cutting is omitted. The on-site cutting step of finished products reduces the energy consumption of the system and improves the shearing efficiency of the material. The system can also be used for shearing rod-shaped materials, increasing the scope of application of the system.

2. The control system of this parallel blade shearing machine balances the dead weight generated by the piston of the shearing cylinder through the setting of the one-way throttle valve to avoid oscillation during operation, thereby eliminating the two strokes of the shearing cylinder's expansion and contraction. The displacement error on the endpoint improves the processing accuracy of the system; through the setting of a one-way quantitative hydraulic motor, the system can accurately control the moving distance of the material, allowing the parallel blade shearing machine to quantitatively cut and improve the cutting accuracy.

Description of drawings

Figure 1 is a schematic diagram of the structural principle of the present utility model.

In the picture: 1. One-way quantitative hydraulic motor; 2. First relief valve; 3. First electromagnetic reversing valve; 4. Second relief valve; 5. Pressing cylinder; 6. Fourth relief valve; 7. The first hydraulic control check valve; 8. Three-position four-way electromagnetic reversing valve; 9. The fifth relief valve; 10. Electric motor; 11. Variable hydraulic pump; 12. Filter; 13. Three-position four-way power supply Hydraulic reversing valve; 14. Shearing cylinder; 15. Third relief valve; 16. Second hydraulic control check valve; 17. Pressure gauge; 18. Two-position electro-hydraulic reversing valve; 20. Material holding cylinder ; 21. Second electromagnetic reversing valve; 24. One-way throttle valve; 25. Fuel tank; 26. First one-way valve.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all implementations. example. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

Referring to Figure 1, the utility model provides a control system for a parallel blade shearing machine, including a quantitative feeding circuit, a locking circuit, a shearing circuit and a main oil circuit. The main oil circuit includes a motor 10, a variable hydraulic pump 11, and a fuel tank. 25 and the first one-way valve 26; the end of the output shaft of the electric motor 10 is connected to the rotating shaft of the variable hydraulic pump 11 through the transmission. The rotation of the electric motor 10 can drive the variable hydraulic pump 11 to work, and the oil inlet of the variable hydraulic pump 11 passes through the main oil inlet pipe. It is connected to the inner cavity of the oil tank 25, and one end of the oil inlet pipe is provided with a filter 12 for filtering the hydraulic oil. The oil outlet of the variable hydraulic pump 11 is fixedly connected with a main oil outlet pipe, which is locked with the quantitative feeding circuit. The circuit is connected to the shear circuit, and a first one-way valve 26 is provided at one end of the main oil outlet pipe close to the variable hydraulic pump 11 .

As can be seen from the above description, the work of the electric motor 10 can enable the variable hydraulic pump 11 to pump the hydraulic oil in the tank 25 to the quantitative feeding circuit, locking circuit or shearing circuit, so that the control system can control the parallel blade shearing machine. , so that the parallel blade shearing machine can realize the cutting of materials.

The setting of the first one-way valve 26 in the main oil circuit can prevent the hydraulic oil in the quantitative feeding circuit, locking circuit and shearing circuit from flowing back along the original path.

The quantitative feeding circuit is used to control the precise feeding of the parallel blade shearing machine, so that the parallel blade shearing machine can accurately control the shearing length of the material. The quantitative feeding circuit includes a one-way quantitative hydraulic motor 1. The one-way quantitative hydraulic motor 1 is used as the power source of the feeding structure in the parallel blade shearing machine. The feeding structure realizes the feeding function under the action of the one-way quantitative hydraulic motor 1 and can Precise feeding is achieved, and in one embodiment of the present application, the specific structure of the feeding structure is the same as the roller conveyor structure disclosed in the authorized patent application number CN202121207971.5.

The oil inlet of the one-way quantitative hydraulic motor 1 is connected to the main oil outlet pipe through the first oil outlet pipe, and an end of the first oil outlet pipe close to the main oil outlet pipe is fixedly connected with a first electromagnetic reversing valve 3. The one-way quantitative hydraulic motor The oil inlet and outlet of 1 are both connected to a first return pipe. The other end of the first return pipe is connected to the oil tank 25. One end of the first return pipe is provided with a first relief valve 2, which is connected to the one-way quantitative hydraulic motor. The first return pipe connected to the oil inlet 1 is located between the first electromagnetic reversing valve 3 and the oil inlet of the one-way quantitative hydraulic motor 1.

It can be seen from the above description that the hydraulic oil in the main oil outlet pipe enters the one-way quantitative hydraulic motor 1, which can cause the one-way quantitative hydraulic motor 1 to rotate, and the first electromagnetic reversing valve 3 can control the start of the one-way quantitative hydraulic motor 1. Stop; the first relief valve 2 functions as a safety valve to protect the one-way quantitative hydraulic motor 1, reduce the impact it receives when changing direction, and avoid overloading during work.

The locking circuit is used to fix the material in the cutting position, and the top and bottom of the material can be longitudinally clamped, which facilitates material cutting and allows the parallel blade shearing machine to cut both bars and certain lengths. Wider sheets to expand uses.

The locking circuit includes an upper pressure circuit and a lower pressure circuit; the upper pressure circuit is used to press the top of the material, and the lower pressure circuit is used to squeeze the bottom of the material.

The upper pressure circuit includes a second oil outlet pipe, a compression cylinder 5 and a three-position four-way electromagnetic reversing valve 8. One end of the second oil outlet pipe is connected to the main oil outlet pipe, and the oil inlet and outlet of the compression cylinder 5 are It is connected to the other end of the second oil outlet branch pipe through a three-position four-way electromagnetic reversing valve 8. The three-position four-way electromagnetic reversing valve 8 is used to control the movement direction of the compression cylinder 5. The oil inlet of the compression cylinder 5 is connected to the other end of the second oil outlet pipe. A first hydraulically controlled one-way valve 7 is provided between the three-position four-way electromagnetic reversing valve 8. The function of the first hydraulically controlled one-way valve 7 is to ensure that the piston of the compression cylinder 5 does not retract during shearing operations to avoid Affects shear quality and plays a locking role.

A second return pipe is provided between the oil inlet of the compression cylinder 5 and the first hydraulic control check valve 7 and between the oil outlet of the compression cylinder 5 and the three-position four-way electromagnetic reversing valve 8. The other end of the return pipe is connected to the oil tank 25. One end of the second return pipe is provided with a second relief valve 4. The function of the two second relief valves 4 is to reduce the impact of the compression cylinder 5 when changing direction. Avoid overloading during work.

A fifth return pipe is provided between the three-position four-way electromagnetic reversing valve 8 and the fuel tank 25. The end of the fifth return pipe is provided with a fifth relief valve 9. The fifth relief valve 9 is used as a back pressure valve. It is used to ensure that the piston component of the compression cylinder 5 does not fall due to its own weight and plays a balancing role.

The lower pressure circuit includes the third oil outlet branch pipe, the material holding cylinder 20, the second electromagnetic reversing valve 21 and the two-position electro-hydraulic reversing valve 18. One end of the third oil outlet branch pipe is connected to the main oil outlet pipe. One end of the branch pipe is fixedly connected with a pressure gauge 17, and the other end of the third oil outlet branch pipe is fixedly connected with branch pipe one, branch pipe two and a fourth return pipe.

The other end of branch pipe one is connected to the two-position two-way electro-hydraulic reversing valve 18, the other end of the two-position two-way electro-hydraulic reversing valve 18 is connected to the oil tank 25, and the other end of branch pipe two is connected to the oil inlet of the material holding cylinder 20. One end of branch pipe two is fixedly connected with a second electromagnetic reversing valve 21. Another fourth return pipe is connected between the second electromagnetic reversing valve 21 and the oil inlet of the material holding cylinder 20. The second electromagnetic reversing valve 21 is close to One side of branch pipe two is also fixedly connected with a fourth return pipe, and the oil outlet of the material support cylinder is also fixedly connected with a fourth return pipe. The other ends of the four fourth return pipes in the downward pressure circuit are all connected to the fuel tank 25. A fourth overflow valve 6 is fixedly connected to one end of the fourth return pipe.

The second electromagnetic reversing valve 21 in this application is used to control the movement direction of the material holding cylinder 20. The function of the fourth overflow valve 6 is to form an upward pressure on the piston of the material holding cylinder 20 through the back pressure generated during shearing. The lifting force, together with the shear cylinder 14 and the compression cylinder 5 in the shear circuit, form a three-dimensional compressive stress state on the material, which is as close to the pure shear state as possible to improve the shear quality, and the material support cylinder 20 When resetting, the subsequently conveyed materials will push the cut materials off the material support platform and fall into the designed unloading plate. The materials will be transferred to the receiving basket through the unloading plate, shortening the two adjacent materials. Cut intervals to improve work efficiency. The design purpose of the blanking plate is to reduce the impact force of the material when it falls.

The first electromagnetic reversing valve 3 and the second electromagnetic reversing valve 21 are both two-position three-way electromagnetic reversing valves.

The shearing circuit includes a fourth oil outlet branch pipe connected to the main oil outlet pipe, a three-position four-way electro-hydraulic reversing valve 13 connected to the fourth oil outlet pipe, and a shearing cylinder 14 connected to the three-position four-way electro-hydraulic reversing valve 13. , there is a second hydraulic control check valve 16 and a one-way throttle valve 24 between the three-position four-way electro-hydraulic directional valve 13 and the oil outlet of the shear cylinder 14, and the one-way throttle valve 24 is far away from the three-position four-way electric A third return pipe is provided between the liquid reversing valve 13, the oil outlet of the shearing cylinder 14 and the one-way throttle valve 24. The other end of the third return pipe is connected to the oil tank 25, and one end of the third return pipe is provided with The third relief valve 15.

As can be seen from the above description, the second hydraulically controlled one-way valve 16 is used to ensure that the piston of the shearing cylinder 14 does not fall due to its own weight when stopped, so as to avoid causing accidents. The function of the one-way throttle valve 24 is to balance the dead weight generated by the piston of the shear cylinder 14, avoid oscillation during operation, eliminate the displacement error between the two strokes of the shear cylinder 14, and improve processing accuracy.

The electrical components involved in this application are all existing technologies. Those skilled in the art understand their connection methods. Those skilled in the art can realize the connection between the devices based on the following description and the accompanying drawings. According to the situation, select the appropriate controller to meet the control needs. For specific connections and control sequences, please refer to the description below. The following mainly introduces the working principle and process, and does not explain the electrical control.

To sum up: when the control system of the parallel blade shearing machine is used, it is used in conjunction with the positioning sensor to achieve the initial positioning of the material. The one-way quantitative hydraulic motor 1 controls the work of the loading structure of the parallel blade shearing machine, and the oil tank 25 The hydraulic oil in the system enters the quantitative feeding circuit through the main oil outlet pipe and the first oil outlet branch pipe. When the one-way quantitative hydraulic motor 1 is working, automatic feeding can be realized. When the system is used for the first time, until the positioning sensor detects that the material moves to After the shearing position, the one-way quantitative hydraulic motor 1 stops working, and the hydraulic oil enters the oil inlet of the compression cylinder 5 through the second oil outlet pipe. The compression cylinder 5 compresses the top of the material, and the hydraulic oil passes through The third oil outlet branch pipe enters from the oil inlet of the material support cylinder 20. The material support cylinder 20 squeezes the bottom of the material. The material support cylinder 20 and the compression cylinder 5 are used in conjunction to realize the clamping and fixation of the material. The hydraulic pressure The oil passes through the fourth oil outlet pipe to enable the shearing cylinder 14 to cut the material. After the material is cut, under the action of the reversing valve in the system, the shearing cylinder 14, the material holding cylinder 20 and the pressing cylinder 5 are reset. The one-way quantitative hydraulic motor 1 continues to work. At this time, the system can accurately control the moving length of the material through the one-way quantitative hydraulic motor 1, so that the parallel blade shearing machine can accurately control the shearing length of the material, and the subsequent transmission The material will push the cut material down from the supporting platform, shortening the interval between two adjacent cuts and improving work efficiency.

The standard parts used in this utility model can be purchased from the market, and the special-shaped parts can be customized according to the instructions and drawings. The specific connection methods of each part are all mature bolts, rivets, and welding in the existing technology. Conventional means, machinery, parts and equipment are all conventional models in the prior art, and will not be described in detail here. Contents not described in detail in this specification belong to the prior art known to those skilled in the art, although they have been The embodiments of the present invention have been shown and described. It will be understood by those of ordinary skill in the art that various changes, modifications, and substitutions can be made to these embodiments without departing from the principles and spirit of the present invention. and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

1. A control system for a parallel blade shearing machine, including a quantitative feeding circuit, a locking circuit, a shearing circuit and a main oil circuit, characterized in that: the main oil circuit includes an electric motor (10) and an electric motor (10) The variable hydraulic pump (11) connected to the output shaft, the oil tank (25) connected to the oil inlet of the variable hydraulic pump (11) through the main oil inlet pipe, and the main oil outlet pipe connected to the oil outlet of the variable hydraulic pump (11), as described One end of the main oil outlet pipe is provided with a first one-way valve (26); The quantitative feeding circuit includes a one-way quantitative hydraulic motor (1), a first electromagnetic reversing valve (3) connected to the oil inlet of the one-way quantitative hydraulic motor (1), and two first relief valves (2). The other end of the first electromagnetic reversing valve (3) is connected to the main oil outlet pipe through a first oil outlet branch pipe, and the oil inlet and oil outlet of the one-way quantitative hydraulic motor (1) are connected to the first oil outlet pipe. Return pipe, the other end of the first return pipe is connected to the fuel tank (25), and one end of the first return pipe is provided with a first overflow valve (2); The locking circuit includes an upper pressure circuit connected to the main oil outlet pipe through a second oil outlet branch pipe and a lower pressure circuit connected to the main oil outlet pipe through a third oil outlet branch pipe; the lower pressure circuit includes a material holding cylinder (20) , the second electromagnetic reversing valve (21) and the two-position electro-hydraulic reversing valve (18) connected to the oil inlet of the material support cylinder (20), the second electromagnetic reversing valve (21) and the two-position two-way electro-hydraulic reversing valve (18) Both the electrified hydraulic reversing valve (18) are connected to the end of the third oil outlet pipe, and one end of the third oil outlet pipe is connected to a pressure gauge (17); The shear circuit includes a fourth oil outlet branch pipe connected to the main oil outlet pipe, a three-position four-way electro-hydraulic reversing valve (13) connected to the fourth oil outlet pipe, and a three-position four-way electro-hydraulic reversing valve (13). The connected shear cylinder (14) is provided with a second hydraulically controlled one-way valve (16) and a one-way check valve (16) between the three-position four-way electro-hydraulic directional valve (13) and the oil outlet of the shear cylinder (14). Throttle valve (24). 2. The control system of a parallel blade shearing machine according to claim 1, characterized in that: the upper pressure circuit includes a compression cylinder (5) and a three-position four-way electromagnetic reversing valve (8), so The oil inlet and oil outlet of the compression cylinder (5) are connected to one end of the second oil outlet branch away from the main oil outlet pipe through a three-position four-way electromagnetic reversing valve (8). There is a first hydraulic control check valve (7) between the oil inlet and the three-position four-way electromagnetic directional valve (8). 3. The control system of a parallel blade shearing machine according to claim 1, characterized in that: the first electromagnetic reversing valve (3) and the second electromagnetic reversing valve (21) are both two-position three-position valves. Open the solenoid reversing valve. 4. The control system of a parallel blade shearing machine according to claim 2, characterized in that: there is a gap between the oil inlet of the compression cylinder (5) and the first hydraulic control check valve (7). A second return pipe is provided between the oil outlet of the compression cylinder (5) and the three-position four-way electromagnetic reversing valve (8). The other end of the second return pipe is connected to the oil tank (25). A second overflow valve (4) is provided at one end of the second return pipe, and a fifth return pipe is provided between the three-position four-way electromagnetic reversing valve (8) and the oil tank (25). The end of the fifth return pipe The fifth relief valve (9) is provided at the bottom. 5. The control system of a parallel blade shearing machine according to claim 1, characterized in that: the one-way throttle valve (24) is away from the three-position four-way electro-hydraulic reversing valve (13), and the shearing machine A third return pipe is provided between the oil outlet of the cutting cylinder (14) and the one-way throttle valve (24). The other end of the third return pipe is connected to the fuel tank (25). One end is provided with a third relief valve (15). 6. The control system of a parallel blade shearing machine according to claim 1, characterized in that a filter (12) is provided at one end of the main oil inlet pipe. 7. The control system of a parallel blade shearing machine according to claim 1, characterized in that: the oil inlet and outlet of the material holding cylinder (20) and the third oil outlet branch are far away from the main oil outlet pipe. One end of the fourth return pipe and one end of the second electromagnetic reversing valve (21) are connected to a fourth return pipe. The other end of the fourth return pipe is connected to the oil tank (25). One end of the fourth return pipe is fixedly connected to a fourth overflow pipe. flow valve (6).