A CBR-based fast forging press control system and control method

Abstract

The application is suitable for the technical field of hydraulic machines, and provides a quick forging press control system and control method based on CBR, which comprises: an upper liquid charging tank installed on the top of a quick forging press host; a pump group installed on a ground base and connected with a lower power tank; the quick forging press host installed on the ground base and comprising a main cylinder, a side cylinder and a return cylinder; the lower power tank installed on the ground base and connected with the upper liquid charging tank; a return valve block installed in a pit, the return valve block being connected with the pump group and a quick forging accumulator unit; the quick forging accumulator unit installed in the pit and connected with the return cylinder; a main side cylinder pressure relief valve group installed on the top of the quick forging press host, the main side cylinder pressure relief valve group being connected with the upper liquid charging tank, the main cylinder and the side cylinder; and a main side cylinder pressure increasing valve group installed on the top of the quick forging press host, the main side cylinder pressure increasing valve group being connected with the upper liquid charging tank and the main side cylinder. The application has the advantages of action coordination, high forging precision and strong anti-interference capability, and is highly practical.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic press technology, and particularly relates to a control system and control method for a CBR-based fast forging press. Background Technology

[0002] Forging is a basic process for metal plastic processing. With the increasingly widespread application of high-speed forging hydraulic presses, more and more high-speed forging hydraulic presses are being installed at user sites.

[0003] When forging billets on a high-speed forging hydraulic press, the accuracy of the forging process is directly affected by variations in material, number of pumps, and number of cylinders. Currently, operators typically allow for a margin of 5mm or more based on the required forging dimensions to prevent overshooting during high-speed forging, and then ensure the accuracy of the forging through subsequent machining. This results in longer processing time and lower material utilization. Therefore, we propose a high-speed forging press control system and method based on CBR (Continuous Braking System). Summary of the Invention

[0004] The purpose of this invention is to provide a CBR-based control system for a fast forging press, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A CBR-based fast forging press control system includes:

[0007] The top-filled hydraulic oil tank is installed on the top of the main unit of the high-speed forging press;

[0008] The pump unit is installed on the ground foundation and connected to the lower power oil tank;

[0009] The main body of the high-speed forging press is installed on a ground foundation. The main body of the high-speed forging press includes a main cylinder, a side cylinder, and a return cylinder.

[0010] The lower power oil tank is installed on the ground foundation and connected to the upper fluid-filled oil tank;

[0011] The return valve block is installed in the pit and connects the pump group and the fast forging accumulator unit.

[0012] The fast forging accumulator unit is installed in the pit and connected to the return cylinder;

[0013] The main side cylinder pressure relief valve assembly is installed on the top of the main machine of the fast forging press. The main side cylinder pressure relief valve assembly is connected to the upper filling oil tank and the main cylinder and the side cylinder.

[0014] The main and side cylinder pressurization valve assembly is installed on the top of the main machine of the fast forging press. The main and side cylinder pressurization valve assembly is connected to the upper filling oil tank and the main cylinder and side cylinder.

[0015] Furthermore, the upper-filled oil tank includes an oil tank housing, a filter, and pipelines connected to the outside; the filter is installed on the top of the oil tank housing.

[0016] Furthermore, the pump set includes an electric motor, a metering pump, a safety valve, a solenoid valve, and pipelines connected to the outside.

[0017] Furthermore, the main body of the high-speed forging press also includes a displacement sensor, a slider, and pipelines connected to the outside; one end of the displacement sensor is fixed on the main body of the high-speed forging press, and the other end of the displacement sensor is connected to the slider for measuring the position of the slider; the main cylinder, side cylinder, and return cylinder are all connected to the slider; there are two side cylinders and two return cylinders.

[0018] Furthermore, the lower power oil tank includes a liquid level sensor, a second oil tank housing, an air filter, and a pipeline connected to the outside; the liquid level sensor is fixed on one side of the second oil tank housing; the second oil tank housing is connected to the first oil tank housing via a pipeline; and the air filter is fixed on the top of the second oil tank housing.

[0019] Furthermore, the return valve block includes a second safety valve, a sliding ball valve, a down-draft speed control valve, a return speed control valve, and a pipeline connected to the outside.

[0020] Furthermore, the fast forging accumulator unit includes a one-way valve, a connecting servo valve, a gas cylinder, a piston accumulator, and pipelines connected to the outside; the return cylinder is connected to the piston accumulator through the one-way valve and the connecting servo valve.

[0021] Furthermore, the main cylinder pressure relief valve assembly includes a side cylinder drain valve, a main cylinder drain valve, and an external connection pipeline.

[0022] Furthermore, the main cylinder pressurization valve assembly includes a main cylinder pressurization valve, a side cylinder pressurization valve, and external connection pipelines.

[0023] A control method for the above-mentioned CBR-based fast forging press control system includes the following steps:

[0024] Step 1: Assemble the CBR-based fast forging hydraulic press control system;

[0025] Step 2: After the CBR-based fast forging hydraulic press control system is powered on, pre-select the number of motors to operate;

[0026] Step 3: Set different forging pass parameters on the working interface according to the forging process requirements, including the stop position, return height and pressing position of the slide forging;

[0027] Step 4: On the control panel, use the knob to select whether to use one master cylinder, two side cylinders, or one master cylinder + two side cylinders for pressurization.

[0028] Step 5: After the fast forging press is started and running, the CBR-based fast forging hydraulic press control system deduces the control output target curves of the connecting servo valve, the side cylinder drain valve and the main cylinder drain valve based on the current number of motors, the slide block pressing position, the working mode of the main cylinder and the side cylinder and the forging material characteristic parameters.

[0029] Step 6: When the fast forging press is pressing down, the CBR-based fast forging hydraulic press control system controls the side cylinder drain valve and the main cylinder drain valve to operate according to the retrieved case parameters, thereby achieving forging size control.

[0030] Step 7: When the fast forging press is working on the return stroke, the CBR-based fast forging hydraulic press control system controls the output opening size of the connecting servo valve according to the retrieved case parameters, and automatically matches the slide block pressing speed.

[0031] Step 8: The high-speed forging press continues to repeat steps 5-7 until the entire forging process of the forging is completed.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] (1) Coordinated Actions: The opening size of the connecting servo valve can be deduced based on the actual number of motors in operation. The return speed of the fast forging press is automatically matched with the pressing speed, resulting in coordinated actions.

[0034] (2) High forging precision: By using the control parameters of the side cylinder drain valve and the main cylinder drain valve obtained by reasoning, the pressing precision of the slider can be ±1mm, which saves subsequent processing time and improves the utilization rate of raw materials.

[0035] (3) Strong anti-interference ability: When the number of motors changes or the number of main cylinders and side cylinders is switched during the operation, new parameters are automatically deduced, which can meet the usage requirements under different working conditions. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of the present invention.

[0037] In the diagram: 1. Upper filling oil tank; 1.1. Tank housing 1; 1.2. Filter; 2. Pump assembly; 2.1. Motor; 2.2. Metering pump; 2.3. Safety valve 1; 2.4. Solenoid valve; 3. Fast forging press main unit; 3.1. Displacement sensor; 3.2. Main cylinder; 3.3. Side cylinder; 3.4. Slider; 3.5. Return cylinder; 4. Lower power oil tank; 4.1. Liquid level sensor; 4.2. Tank housing 2; 4.3. Air filter; 5. Return valve block; 5.1. Safety valve 2; 5.2. Slider downward ball valve; 5.3. Downward speed control valve; 5.4. Return speed control valve; 6. Fast forging accumulator unit; 6.1. Check valve; 6.2. Connecting servo valve; 6.3. Gas cylinder; 6.4. Piston accumulator; 7. Main and side cylinder pressure relief valve assembly; 7.1. Side cylinder drain valve; 7.2. Main cylinder drain valve; 8. Main and side cylinder pressure valve assembly; 8.1. Main cylinder pressure valve; 8.2. Side cylinder pressure valve. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0039] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0040] like Figure 1 As shown, a CBR-based fast forging press control system is provided according to an embodiment of the present invention, comprising:

[0041] The upper filling oil tank 1 is installed on top of the main unit 3 of the fast forging press;

[0042] Pump unit 2 is installed on the ground foundation and connected to the lower power oil tank 4;

[0043] The main body 3 of the fast forging press is installed on the ground foundation. The main body 3 of the fast forging press includes a main cylinder 3.2, a side cylinder 3.3 and a return cylinder 3.5.

[0044] The lower power oil tank 4 is installed on the ground foundation and connected to the upper fluid-filling oil tank 1;

[0045] The return valve block 5 is installed in the pit, and the return valve block 5 is connected to the pump group 2 and the fast forging accumulator unit 6.

[0046] The fast forging accumulator unit 6 is installed in the pit and connected to the return cylinder 3.5;

[0047] The main side cylinder pressure relief valve assembly 7 is installed on the top of the main machine 3 of the fast forging press. The main side cylinder pressure relief valve assembly 7 is connected to the upper filling oil tank 1, the main cylinder 3.2 and the side cylinder 3.3.

[0048] The main and side cylinder pressurization valve assembly 8 is installed on the top of the main machine 3 of the fast forging press. The main and side cylinder pressurization valve assembly 8 is connected to the upper filling oil tank 1, the main cylinder 3.2 and the side cylinder 3.3.

[0049] like Figure 1 As shown, in a preferred embodiment of the present invention, the upper-filled oil tank 1 includes an oil tank housing 1.1, a filter 1.2, and a pipeline connected to the outside; the filter 1.2 is installed on the top of the oil tank housing 1.1.

[0050] like Figure 1 As shown, in a preferred embodiment of the present invention, the pump unit 2 includes an electric motor 2.1, a metering pump 2.2, a safety valve 2.3, a solenoid valve 2.4, and pipelines connected to the outside.

[0051] like Figure 1 As shown, in a preferred embodiment of the present invention, the main body 3 of the high-speed forging press further includes a displacement sensor 3.1, a slider 3.4, and a pipeline connected to the outside; one end of the displacement sensor 3.1 is fixed on the main body 3 of the high-speed forging press, and the other end of the displacement sensor 3.1 is connected to the slider 3.4 for measuring the position of the slider; the main cylinder 3.2, the side cylinder 3.3, and the return cylinder 3.5 are all connected to the slider 3.4; there are two of each of the side cylinder 3.3 and the return cylinder 3.5.

[0052] In this embodiment of the invention, preferably, when the fast forging press is working, the slider 3.4 moves up and down, and it is necessary to control the accuracy and repeatability of the pressing position of the slider 3.4.

[0053] like Figure 1 As shown, in a preferred embodiment of the present invention, the lower power oil tank 4 includes a liquid level sensor 4.1, an oil tank housing 4.2, an air filter 4.3, and a pipeline connected to the outside; the liquid level sensor 4.1 is fixed on one side of the oil tank housing 4.2; the oil tank housing 4.2 is connected to the oil tank housing 1.1 through the pipeline; the air filter 4.3 is fixed on the top of the oil tank housing 4.2.

[0054] like Figure 1 As shown, in a preferred embodiment of the present invention, the return valve block 5 includes a safety valve 5.1, a slider downward ball valve 5.2, a downward speed regulating valve 5.3, a return speed regulating valve 5.4, and a pipeline connected to the outside.

[0055] like Figure 1 As shown, in a preferred embodiment of the present invention, the fast forging accumulator unit 6 includes a one-way valve 6.1, a connecting servo valve 6.2, a gas cylinder 6.3, a piston accumulator 6.4, and a pipeline connected to the outside; the return cylinder 3.5 is connected to the piston accumulator 6.4 through the one-way valve 6.1 and the connecting servo valve 6.2.

[0056] In a preferred embodiment of the invention, the opening size of the connecting servo valve 6.2 can be inferred from the current number of motors 2.1 in the CBR-based fast forging hydraulic press control system.

[0057] like Figure 1 As shown, in a preferred embodiment of the present invention, the main cylinder pressure relief valve group 7 includes a side cylinder drain valve 7.1, a main cylinder drain valve 7.2, and an external connection pipeline.

[0058] In a preferred embodiment of the invention, the CBR-based fast forging hydraulic press control system can deduce the control output target curves of the side cylinder drain valve 7.1 and the main cylinder drain valve 7.2 based on the pressing position of the slider 3.4, thereby achieving a pressing accuracy of ±1mm for the slider 3.4.

[0059] like Figure 1 As shown, in a preferred embodiment of the present invention, the main cylinder pressurization valve group 8 includes a main cylinder pressurization valve 8.1, a side cylinder pressurization valve 8.2, and an external connection pipeline.

[0060] In this embodiment of the invention, when the fast forging press descends: the pump group 2 delivers the hydraulic oil in the lower power oil tank 4 to the high-pressure pipeline, the hydraulic oil enters the upper filling oil tank 1, and after the main side cylinder pressurization valve group 8 is opened, the hydraulic oil enters the main cylinder 3.2 and the two side cylinders 3.3, thereby driving the slider 3.4 to descend, and compressing the hydraulic oil in the two return cylinders 3.5 through the one-way valve 6.1 and the connecting servo valve 6.2 to the piston accumulator 6.4.

[0061] During the return stroke of the fast forging press: the fast forging accumulator unit 6 releases the compressed hydraulic oil to the two return cylinders 3.5 through the connecting servo valve 6.2, thereby driving the slide block 3.4 to return. The main cylinder 3.2 and the two side cylinders 3.3 release the hydraulic oil to the upper filling oil tank 1 through the side cylinder drain valve 7.1 and the main cylinder drain valve 7.2.

[0062] When the fast forging press is working, the slide block 3.4 continuously repeats the downward and return process. When the slide block 3.4 presses the forging by moving up and down, the displacement sensor 3.1 detects the displacement of the slide block 3.4 to obtain the actual height of the forging. Once the slide block 3.4 presses to the set position, it is necessary to control the pressure relief valve group 7 of the main side cylinder to release pressure. The fast forging accumulator unit 6 releases the compressed hydraulic oil to the two return cylinders 3.5 through the servo valve 6.2, driving the slide block 3.4 to return.

[0063] An embodiment of the present invention provides a control method for a CBR-based fast forging press control system, comprising the following steps:

[0064] Step 1: Assemble the CBR-based fast forging hydraulic press control system;

[0065] Step 2: After the CBR-based fast forging hydraulic press control system is powered on, determine the number of motors 2.1 operating in the pre-selected pump group 2;

[0066] Step 3: Set different forging pass parameters on the working interface according to the forging process requirements, including the stop position, return height and pressing position of the slider 3.4 forging;

[0067] Step 4: On the control panel, use the knob to select whether to use one main cylinder 3.2, two side cylinders 3.3, or one main cylinder 3.2 + two side cylinders 3.3 for pressurization.

[0068] Step 5: After the fast forging press is started and running, the CBR-based fast forging hydraulic press control system deduces the control output target curves of the connecting servo valve 6.2, the side cylinder drain valve 7.1 and the main cylinder drain valve 7.2 based on the current number of motors 2.1, the pressing position of the slider 3.4, the working mode of the main cylinder 3.2 and the side cylinder 3.3 and the material characteristic parameters of the forging.

[0069] Step 6: When the fast forging press is pressing down, the CBR-based fast forging hydraulic press control system controls the side cylinder drain valve 7.1 and the main cylinder drain valve 7.2 to operate according to the retrieved case parameters, thereby achieving forging size control;

[0070] Step 7: When the fast forging press is working on the return stroke, the CBR-based fast forging hydraulic press control system controls the output opening size of the connecting servo valve 6.2 according to the retrieved case parameters, and automatically matches the pressing speed of the slider 3.4.

[0071] Step 8: The high-speed forging press continues to repeat steps 5-7 until the entire forging process of the forging is completed.

[0072] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A control system for a high-speed forging press based on CBR, characterized in that, include: The top-filled oil tank is installed on the top of the main unit of the high-speed forging press; the top-filled oil tank includes an oil tank shell, a filter, and pipelines connected to the outside. The filter is installed on the top of the fuel tank housing; The pump set is installed on the ground foundation and connected to the lower power oil tank; the pump set includes an electric motor, a fixed displacement pump, a safety valve, a solenoid valve, and pipelines connected to the outside. The main body of the high-speed forging press is installed on a ground foundation. The main body includes a main cylinder, side cylinders, and a return cylinder. It also includes a displacement sensor, a slider, and externally connected piping. One end of the displacement sensor is fixed to the main body, and the other end is connected to the slider for measuring its position. The main cylinder, side cylinder, and return cylinder are all connected to the slider. Two side cylinders and two return cylinders are provided. The lower power oil tank is installed on the ground foundation and connected to the upper filling oil tank; the lower power oil tank includes a liquid level sensor, a second oil tank housing, an air filter, and pipelines connecting to the outside; the liquid level sensor is fixed on one side of the second oil tank housing; the second oil tank housing is connected to the first oil tank housing through pipelines; the air filter is fixed on the top of the second oil tank housing. The return valve block is installed in the pit and connects the pump group and the fast forging accumulator unit. The return valve block includes a second safety valve, a sliding block downward ball valve, a downward speed regulating valve, a return speed regulating valve, and pipelines connected to the outside. The fast forging accumulator unit is installed in a pit and connected to the return cylinder; the fast forging accumulator unit includes a check valve, a connecting servo valve, a gas cylinder, a piston accumulator, and pipelines connected to the outside; the return cylinder is connected to the piston accumulator through the check valve and the connecting servo valve. The main and side cylinder pressure relief valve assembly is installed on the top of the fast forging press. The main and side cylinder pressure relief valve assembly is connected to the upper filling oil tank, the main cylinder, and the side cylinder. The main and side cylinder pressure relief valve assembly includes a side cylinder drain valve, a main cylinder drain valve, and external connection pipelines. The main and side cylinder pressurization valve assembly is installed on the top of the fast forging press. The main and side cylinder pressurization valve assembly is connected to the upper filling oil tank and the main cylinder and side cylinder. The main and side cylinder pressurization valve assembly includes a main cylinder pressurization valve, a side cylinder pressurization valve and external connection pipelines.

2. A control method applied to the CBR-based fast forging press control system as described in claim 1, characterized in that, Includes the following steps: Step 1: Assemble the CBR-based fast forging press control system; Step 2: After the CBR-based fast forging press control system is powered on, pre-select the number of motors to operate; Step 3: Set different forging pass parameters on the working interface according to the forging process requirements, including the stop position, return height and pressing position of the slide forging; Step 4: On the control panel, use the knob to select whether to use one master cylinder, two side cylinders, or one master cylinder + two side cylinders for pressurization. Step 5: After the fast forging press is started and running, the CBR-based fast forging press control system deduces the control output target curves of the connected servo valve, the side cylinder drain valve and the main cylinder drain valve based on the current number of motors, the slide block pressing position, the working mode of the main cylinder and the side cylinder and the forging material characteristic parameters. Step 6: When the fast forging press is pressing down, the CBR-based fast forging press control system controls the side cylinder drain valve and the main cylinder drain valve to operate according to the retrieved case parameters, thereby achieving forging size control. Step 7: When the fast forging press is working on the return stroke, control the size of the output opening of the connecting servo valve to automatically match the sliding block pressing speed; Step 8: The high-speed forging press continues to repeat steps 5-7 until the entire forging process of the forging is completed.

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