Hydraulic lifting platform control system

Abstract

The invention discloses a hydraulic lifting platform control system which comprises a working platform sliding control system, the working platform sliding control system is provided with an input port and an output port, the input port is used for receiving a front in-place signal, a high-position platform front in-place signal, a low-position platform front in-place signal, a rear in-place signal, an input speed reduction signal and an output speed reduction signal; the output port is in communication connection with the motor and is used for controlling the motor to rotate so as to realize push-in and push-out actions, and the workbench sliding control system has an IO control mode and a time control mode; and the hydraulic lifting control system is provided with an input port and an output port. According to the hydraulic lifting table control system, through the workbench sliding control system and the hydraulic lifting control system, automatic control over pushing-in, pushing-out and lifting of the exchange table can be effectively achieved.

Description

Technical Field

[0001] The present invention relates to a control system, and more particularly to a hydraulic lifting platform control system. Background Art

[0002] The lifting and exchanging worktable of the laser cutting machine is a device used in the field of laser cutting, which can realize the rapid loading and unloading of the laser cutting machine. At present, the lifting and exchanging worktables of most laser cutting machines on the market use mechanical transmission. With the continuous advancement of laser cutting technology, high-power laser cutting machines have emerged. Due to the high power of the laser, the high-power laser cutting machine can cut steel plates with a large area, such as the 6000×2500mm steel plate currently on the market. This kind of steel plate has a large area and is relatively thick, so it is also heavy. For such large-area thick plates, the lifting worktable of the high-power laser cutting machine must be able to lift it up, and at the same time, it must have a certain speed. However, the lifting and exchanging worktable of this type of mechanical transmission laser cutting machine on the market currently has the following three disadvantages: 1. The lifting and exchanging speed of the worktable is slow and the exchange time is long; 2. The maximum weight of the workpiece that the worktable can bear is small, which cannot meet the use of high-power laser cutting machines; 3. The mechanical transmission worktable has a complex structure, a long installation time, and later maintenance is more troublesome and costly.

[0003] Therefore, in the prior art, there is an invention patent with patent number 201910870759.8, entitled A Hydraulic Lifting Worktable for a Laser Cutting Machine, which discloses that a chassis, a worktable and a hydraulic lifting device are provided, and the effect of rapid lifting is achieved through the action of the hydraulic lifting device. However, the above-mentioned hydraulic lifting device can only achieve lifting and lowering, and cannot cooperate with the pushing in and pushing out of the exchange table. Therefore, manual and real-time control of the pushing in and pushing out and the hydraulic lifting of the exchange table is required, and thus the degree of automation is not very high. Summary of the invention

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a hydraulic lift control system with a higher degree of automation.

[0005] To achieve the above object, the present invention provides the following technical solution: a hydraulic lifting platform control system, comprising: The workbench sliding control system has an input port and an output port. The input port is used to receive a front arrival signal, a high-position table front arrival signal, a low-position table front arrival signal, a rear arrival signal, an in-deceleration signal, and an out-deceleration signal. The output port is connected to the motor for controlling the motor to rotate and thus realize the push-in and push-out actions. The workbench sliding control system has an IO control mode and a time control mode. A hydraulic lifting control system, the hydraulic lifting control system having an input port and an output port, the input port is used to receive an upper limit signal, a lower limit signal, an upper deceleration signal and a lower deceleration signal, and the output port is connected to the hydraulic device for controlling the action of the hydraulic device to achieve lifting; Among them, the front in-position signal is the horizontal push-in in-position signal, the high-position platform front in-position signal is the high-position platform push-in in-position signal, the position platform front in-position signal is the low-position platform push-in in-position signal, the rear in-position signal is the horizontal push-out in-position signal, the entry deceleration signal is the horizontal push-in deceleration signal, the exit deceleration signal is the horizontal push-out deceleration signal, the upper limit signal is the top in-position signal, the lower limit signal is the bottom in-position signal, the upper deceleration signal is the rising deceleration signal, and the lower deceleration signal is the descending deceleration signal.

[0006] As a further improvement of the present invention, the specific steps of the workbench sliding system controlling the exchange table to be pushed in are as follows: Step 1: After starting to push, determine the motion control mode of the workbench sliding control system. If it is determined to be the IO control mode, the exchange table is pushed in at a low speed. After detecting the outgoing deceleration signal, the exchange table is changed to high-speed push-in. After detecting the incoming deceleration signal, the exchange table is changed to low-speed push-in and then enters the next step. If it is determined to be the time control module, the exchange table is first pushed in at a high speed, and after the delay time is reached, the exchange table is changed to low-speed push-in and then enters the next step; Step 2, determine whether two front-in-place signals are received. If so, determine which of the upper and lower limit signals is valid. If the upper limit signal is valid, pushing is completed after receiving the low-position platform front-in-place signal. If the lower limit signal is valid, pushing is completed after receiving the high-position platform front-in-place signal. If two front-in-place signals are not received, pushing is completed until the front-in-place signal is received.

[0007] As a further improvement of the present invention, the specific steps of the workbench sliding system controlling the switching table to be pushed out are as follows: Step 3: After the push-out starts, the motion control mode of the workbench sliding control system is determined. If it is determined to be the IO control mode, the exchange platform retreats at a low speed. After detecting the input deceleration signal, the exchange platform changes to high-speed retreat. After detecting the output deceleration signal, the exchange platform changes to low-speed retreat and then enters the next step. If it is determined to be the time control module, the exchange platform first retreats at a high speed, and after the delay time is reached, the exchange platform changes to low-speed retreat and then enters the next step. Step 4, determine whether the rear-in-place signal is received. If the rear-in-place signal is received, determine that the rear-in-place signal is valid before the push-out is completed. If the rear-in-place signal is not received, determine which of the upper and lower limit signals is valid. If the upper limit signal is valid, determine that the push-out is completed after the lower working frame signal is valid. If the lower limit signal is valid, determine that the push-out is completed after the lower working frame signal is valid.

[0008] As a further improvement of the present invention, the output port of the hydraulic lifting control system includes: Lifting device start output port: energy supply for hydraulic device, equivalent to power supply; Output port of pressure-maintaining of lifting device: pressure-maintaining of hydraulic device, pressure-maintaining when invalid; Output port of lifting device brake: Similar to the function of pressure holding, the brake is released when effective, but there are some differences in timing; Lifting inverter up output port: control hydraulic up; Lowering inverter descending output port: controls hydraulic descent; High-speed output port of lifting inverter: controls hydraulic high speed; Lift inverter low speed output port: controls hydraulic low speed.

[0009] As a further improvement of the present invention, the specific steps of the hydraulic lifting control system to control the lifting device to rise are as follows: Step five, open the start output port after the start of the ascent, delay the ascent start, and open the ascent output port, high-speed output port and pressure-maintaining output port after the delay time is reached, delay before the ascent starts, and open the brake output port after the delay time is reached, and close the high-speed output port after receiving the ascent deceleration signal, open the low-speed output port, and close the brake output port after detecting that the upper limit signal is valid, then close the pressure-maintaining output port after the delay time is reached after the ascent reaches the position, then close the pressure-maintaining output port after the ascent reaches the position signal, then close the ascent output port, high and low speed output ports and start output after the end.

[0010] As a further improvement of the present invention, the specific steps of the hydraulic lifting control system for controlling the lifting device to descend are as follows: Step 6: After the descent begins, determine whether the option to open the start output port only when ascending is checked. If so, directly open the descent output port, high-speed output port, and pressure-maintaining output port, and open the brake output port after the delay time before the descent begins. If not checked, proceed to the next step. Step 7, open the start output port, open the descending output port, high-speed output port and pressure-maintaining output port after the descending start delay time ends, and open the brake output port after the delay time before the descent starts is accepted; Step 8, upon receiving the descending deceleration signal, it is determined whether the descending output port is closed after the deceleration signal is detected during descent. If closed, the descending output port is closed and then the high-speed output port is closed, and the low-speed output port is opened. If not closed, the high-speed output port is directly closed and the low-speed output port is opened. Step nine, after detecting that the lower limit signal is valid, close the brake output port, and close the descending output port, high and low speed output port and starting output port after the delay time ends after descending to the desired position, and then close the pressure holding output port after the delay time for descending pressure holding ends.

[0011] The beneficial effect of the present invention is that, through the setting of the workbench sliding control system, the input port therein can be effectively utilized to receive the signals of various sensors set on the lifting platform in real time, and then the output port can be used to realize the automatic control of the pushing and pushing of the exchange platform, and through the setting of the hydraulic lifting control system, the input port and output port therein can be effectively utilized to realize the real-time reception of the signals of various sensors set on the lifting platform, and then the effect of automatic control of the lifting of the hydraulic device can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the working positions of the hydraulic lifting platform control system of the present invention; Figure 2 A distribution diagram of sensors of a lifting platform used in the hydraulic lifting platform control system of the present invention; Figure 3 Flowchart pushed for switchboard Figure 4 Flowcharts rolled out for the switchboard; Figure 5 Flow chart for the switchboard rise; Figure 6 Flow chart for the switchboard descent; Figure 7 Schematic diagram of the workbench exchange process.

[0013] Description of the accompanying drawings: 1. Air clamp status sensor; 2. Work frame front in-position sensor; 3. Air clamp status sensor; 4. Air clamp status sensor; 5. Air clamp status sensor; 6. Workbench front in-position sensor; 7. Hydraulic platform upper right in-position sensor; 8. Hydraulic platform lower right in-position sensor; 9. Hydraulic platform upper left in-position sensor; 10. Hydraulic platform lower left in-position sensor; 11. High-position platform rear in-position sensor; 12. Low-position platform rear in-position sensor. DETAILED DESCRIPTION

[0014] The present invention will be further described below in detail with reference to the embodiments shown in the accompanying drawings.

[0015] Reference Figures 1 to 7 As shown, a hydraulic lifting platform control system of this embodiment includes: The workbench sliding control system has an input port and an output port. The input port is used to receive a front arrival signal, a high-position table front arrival signal, a low-position table front arrival signal, a rear arrival signal, an in-deceleration signal, and an out-deceleration signal. The output port is connected to the motor for controlling the motor to rotate and thus realize the push-in and push-out actions. The workbench sliding control system has an IO control mode and a time control mode. A hydraulic lifting control system, the hydraulic lifting control system having an input port and an output port, the input port is used to receive an upper limit signal, a lower limit signal, an upper deceleration signal and a lower deceleration signal, and the output port is connected to the hydraulic device for controlling the action of the hydraulic device to achieve lifting; Among them, the front in-position signal is a horizontal push-in in-position signal, the high-position platform front in-position signal is a high-position platform push-in in-position signal, the low-position platform front in-position signal is a low-position platform push-in in-position signal, the rear in-position signal is a horizontal push-out in-position signal, the in-deceleration signal is a horizontal push-in deceleration signal, the out-deceleration signal is a horizontal push-out deceleration signal, the upper limit signal is a top in-position signal, the lower limit signal is a bottom in-position signal, the upper deceleration signal is an ascending deceleration signal, and the lower deceleration signal is a descending deceleration signal. Through the setting of the above-mentioned workbench sliding control system and the hydraulic lifting control system, the push-in and push-out operations of the workbench and the up and down lifting operations of the hydraulic device can be effectively realized automatically. Compared with the manual method in the prior art, the automation efficiency is higher. The various signals in this embodiment are mainly realized by sensors, and the setting positions of the sensors are as shown in FIG. Figure 2 As shown, in the present embodiment, a total of 4 air clamp state sensors are provided, namely air clamp state sensor 1, air clamp state sensor 3, air clamp state sensor 4 and air clamp state sensor 5, and then a work frame front in-position sensor 2, a work table front in-position sensor 6, a hydraulic platform upper right in-position sensor 7, a hydraulic platform lower right in-position sensor 8, a hydraulic platform upper left in-position sensor 9, a hydraulic platform lower left in-position sensor 10, a high-position platform rear in-position sensor 11 and a low-position platform rear in-position sensor 12 are also provided.

[0016] As a specific implementation of the improvement, the specific steps of the workbench sliding system controlling the exchange table to be pushed in are as follows: Step 1: After starting to push, determine the motion control mode of the workbench sliding control system. If it is determined to be the IO control mode, the exchange table is pushed in at a low speed. After detecting the outgoing deceleration signal, the exchange table is changed to high-speed push-in. After detecting the incoming deceleration signal, the exchange table is changed to low-speed push-in and then enters the next step. If it is determined to be the time control module, the exchange table is first pushed in at a high speed, and after the delay time is reached, the exchange table is changed to low-speed push-in and then enters the next step; Step 2, determine whether two front-in-place signals are received. If so, determine which of the upper and lower limit signals is valid. If the upper limit signal is valid, pushing is completed after receiving the low-position platform front-in-place signal. If the lower limit signal is valid, pushing is completed after receiving the high-position platform front-in-place signal. If two front-in-place signals are not received, pushing is completed until the front-in-place signal is received. Through the settings of the above steps 1 and 2, the automatic pushing control of the workbench can be effectively realized.

[0017] As a specific implementation of the improvement, the specific steps of the workbench sliding system controlling the exchange table to be pushed out are as follows: Step 3: After the push-out starts, the motion control mode of the workbench sliding control system is determined. If it is determined to be the IO control mode, the exchange platform retreats at a low speed. After detecting the input deceleration signal, the exchange platform changes to high-speed retreat. After detecting the output deceleration signal, the exchange platform changes to low-speed retreat and then enters the next step. If it is determined to be the time control module, the exchange platform first retreats at a high speed, and after the delay time is reached, the exchange platform changes to low-speed retreat and then enters the next step. Step 4, determine whether the rear-in-place signal is received. If the rear-in-place signal is received, determine that the push-out ends after the rear-in-place signal is valid. If the rear-in-place signal is not received, determine which of the upper and lower limit signals is valid. If the upper limit signal is valid, determine that the push-out ends after the lower working frame signal is valid. If the lower limit signal is valid, determine that the push-out ends after the lower working frame signal is valid. Through the settings of the above steps three and four, the push-out control of the automated control workbench can be effectively realized.

[0018] As an improved specific implementation, the output port of the hydraulic lifting control system includes: Lifting device start output port: energy supply for hydraulic device, equivalent to power supply; Output port of pressure-maintaining of lifting device: pressure-maintaining of hydraulic device, pressure-maintaining when invalid; Output port of lifting device brake: Similar to the function of pressure holding, the brake is released when effective, but there are some differences in timing; Lifting inverter up output port: control hydraulic up; Lowering inverter descending output port: controls hydraulic descent; High-speed output port of lifting inverter: controls hydraulic high speed; Low-speed output port of lifting inverter: controls hydraulic low speed. Through the setting of the above output port, the action of hydraulic lifting device can be controlled in all directions to achieve the effect of automatic control of lifting.

[0019] As an improved specific implementation method, the specific steps of the hydraulic lifting control system to control the lifting device to rise are as follows: Step five, open the start output port after starting to rise, delay the rise start, and open the rise output port, high-speed output port and pressure-maintaining output port after the delay time is reached, delay before starting to rise, and open the brake output port after the delay time is reached, and close the high-speed output port after receiving the rise deceleration signal, open the low-speed output port, and close the brake output port after detecting that the upper limit signal is valid, then close the pressure-maintaining output port after the delay time is reached after rising to the position, then delay closing the pressure-maintaining output port after receiving the rise to position signal, then close the rise output port, high and low speed output ports and start output and end, through the setting of the above step five, the initial hydraulic device can be realized to move quickly, and after receiving the rise deceleration signal, it turns to low speed, and then automatically closes the brake output port when it rises to the top to achieve locking, thereby making the overall workbench more stable and reliable during the rising process.

[0020] As an improved specific implementation method, the specific steps of the hydraulic lifting control system to control the lifting device to descend are as follows: Step 6: After the descent begins, determine whether the option to open the start output port only when ascending is checked. If so, directly open the descent output port, high-speed output port, and pressure-maintaining output port, and open the brake output port after the delay time before the descent begins. If not checked, proceed to the next step. Step 7, open the start output port, open the descending output port, high-speed output port and pressure-maintaining output port after the descending start delay time ends, and open the brake output port after the delay time before the descent starts is accepted; Step 8, upon receiving the descending deceleration signal, it is determined whether the descending output port is closed after the deceleration signal is detected during descent. If closed, the descending output port is closed and then the high-speed output port is closed, and the low-speed output port is opened. If not closed, the high-speed output port is directly closed and the low-speed output port is opened. Step nine, after detecting that the lower limit signal is valid, close the brake output port, and close the descent output port, high and low speed output port and start output port after the delay time ends after the descent is in place, and then close the pressure holding output port after the descent pressure holding delay time ends. Through the settings of steps six to eight, the control workbench can be controlled to descend more smoothly and reduce the occurrence of collisions.

[0021] To sum up, the control system of this embodiment adopts the setting of workbench sliding control system and hydraulic lifting control system, which can realize the automatic pushing and pushing operations and lifting operations of the workbench. Compared with the methods in the prior art, the degree of automation is higher.

[0022] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A hydraulic lifting platform control system, characterized in that: include: The workbench sliding control system has an input port and an output port. The input port is used to receive a front arrival signal, a high-position table front arrival signal, a low-position table front arrival signal, a rear arrival signal, an in-deceleration signal, and an out-deceleration signal. The output port is connected to the motor for controlling the motor to rotate and thus realize the push-in and push-out actions. The workbench sliding control system has an IO control mode and a time control mode. A hydraulic lifting control system, the hydraulic lifting control system having an input port and an output port, the input port is used to receive an upper limit signal, a lower limit signal, an upper deceleration signal and a lower deceleration signal, and the output port is connected to the hydraulic device for controlling the action of the hydraulic device to achieve lifting; Among them, the front in-position signal is the horizontal push-in in-position signal, the high-position platform front in-position signal is the high-position platform push-in in-position signal, the position platform front in-position signal is the low-position platform push-in in-position signal, the rear in-position signal is the horizontal push-out in-position signal, the entry deceleration signal is the horizontal push-in deceleration signal, the exit deceleration signal is the horizontal push-out deceleration signal, the upper limit signal is the top in-position signal, the lower limit signal is the bottom in-position signal, the upper deceleration signal is the rising deceleration signal, and the lower deceleration signal is the descending deceleration signal.

2. The hydraulic lifting platform control system according to claim 1, characterized in that: The specific steps of the workbench sliding system controlling the exchange table to push in are as follows: Step 1: After starting to push, determine the motion control mode of the workbench sliding control system. If it is determined to be the IO control mode, the exchange table is pushed in at a low speed. After detecting the outgoing deceleration signal, the exchange table is changed to high-speed push-in. After detecting the incoming deceleration signal, the exchange table is changed to low-speed push-in and then enters the next step. If it is determined to be the time control module, the exchange table is first pushed in at a high speed, and after the delay time is reached, the exchange table is changed to low-speed push-in and then enters the next step; Step 2, determine whether two front-in-place signals are received. If so, determine which of the upper and lower limit signals is valid. If the upper limit signal is valid, pushing is completed after receiving the low-position platform front-in-place signal. If the lower limit signal is valid, pushing is completed after receiving the high-position platform front-in-place signal. If two front-in-place signals are not received, pushing is completed until the front-in-place signal is received.

3. The hydraulic lifting platform control system according to claim 2, characterized in that: The specific steps of the workbench sliding system controlling the switching table to be pushed out are as follows: Step 3: After the push-out starts, the motion control mode of the workbench sliding control system is determined. If it is determined to be the IO control mode, the exchange platform retreats at a low speed. After detecting the input deceleration signal, the exchange platform changes to high-speed retreat. After detecting the output deceleration signal, the exchange platform changes to low-speed retreat and then enters the next step. If it is determined to be the time control module, the exchange platform first retreats at a high speed, and after the delay time is reached, the exchange platform changes to low-speed retreat and then enters the next step. Step 4, determine whether the rear-in-place signal is received. If the rear-in-place signal is received, determine that the rear-in-place signal is valid before the push-out is completed. If the rear-in-place signal is not received, determine which of the upper and lower limit signals is valid. If the upper limit signal is valid, determine that the push-out is completed after the lower working frame signal is valid. If the lower limit signal is valid, determine that the push-out is completed after the lower working frame signal is valid.

4. The hydraulic lifting platform control system according to claim 3, characterized in that: The output port of the hydraulic lifting control system includes: Lifting device start output port: energy supply for hydraulic device, equivalent to power supply; Output port of pressure-maintaining of lifting device: pressure-maintaining of hydraulic device, pressure-maintaining when invalid; Output port of lifting device brake: Similar to the function of pressure holding, the brake is released when effective, but there are some differences in timing; Lifting inverter up output port: control hydraulic up; Lowering inverter descending output port: controls hydraulic descent; High-speed output port of lifting inverter: controls hydraulic high speed; Lift inverter low speed output port: controls hydraulic low speed.

5. The hydraulic lifting platform control system according to claim 4, characterized in that: The specific steps of the hydraulic lifting control system to control the lifting device to rise are as follows: Step five, open the start output port after the start of the ascent, delay the ascent start, and open the ascent output port, high-speed output port and pressure-maintaining output port after the delay time is reached, delay before the ascent starts, and open the brake output port after the delay time is reached, and close the high-speed output port after receiving the ascent deceleration signal, open the low-speed output port, and close the brake output port after detecting that the upper limit signal is valid, then close the pressure-maintaining output port after the delay time is reached after the ascent reaches the position, then close the pressure-maintaining output port after the ascent reaches the position signal, then close the ascent output port, high and low speed output ports and start output after the end.

6. The hydraulic lifting platform control system according to claim 5, characterized in that: The specific steps of the hydraulic lifting control system to control the lifting device to descend are as follows: Step 6: After the descent begins, determine whether the option to open the start output port only when ascending is checked. If so, directly open the descent output port, high-speed output port, and pressure-maintaining output port, and open the brake output port after the delay time before the descent begins. If not checked, proceed to the next step. Step 7, open the start output port, open the descending output port, high-speed output port and pressure-maintaining output port after the descending start delay time ends, and open the brake output port after the delay time before the descent starts is accepted; Step 8, upon receiving the descending deceleration signal, it is determined whether the descending output port is closed after the deceleration signal is detected during descent. If closed, the descending output port is closed and then the high-speed output port is closed, and the low-speed output port is opened. If not closed, the high-speed output port is directly closed and the low-speed output port is opened. Step nine, after detecting that the lower limit signal is valid, close the brake output port, and close the descending output port, high and low speed output port and starting output port after the delay time ends after descending to the desired position, and then close the pressure holding output port after the delay time for descending pressure holding ends.

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