Monitoring device for adsorption stability of suction cup for aluminum plate processing

Abstract

The invention relates to the technical field of machining equipment, and discloses an aluminum plate machining sucker adsorption stability monitoring device which comprises a monitor, the monitor comprises a shell, a filter cylinder is arranged in the shell, a monitoring cylinder is arranged in the filter cylinder, an inflow cavity is formed between the filter cylinder and the shell, and the inflow cavity is communicated with the monitoring cylinder. The inflow cavity is communicated with the suction cup platform or the control valve through the air inlet, a negative pressure cavity is formed between the monitoring cylinder and the filter cylinder, a movable plug is arranged in the monitoring cylinder, and the interior of the filter cylinder is divided into two monitoring cavities through the movable plug. According to the monitoring device for the suction stability of the suction cup for aluminum plate machining, the pressure difference generated by leakage is used for driving the movable plug to move, the situation that airflow flows into the monitor is judged according to the reversing frequency of the movable plug, and then the sealing situation between the suction cup platform and the aluminum plate is monitored; one monitoring cavity is always kept in a suction state, and normal suction is not interfered while pressure difference is generated to drive the movable plug to move.

Description

Technical Field

[0001] The present application relates to the technical field of machining equipment, and in particular to a monitoring device for the adsorption stability of a suction cup used for aluminum plate processing. Background Art

[0002] The method of fixing the aluminum plate with a suction cup is relatively simple. Compared with other mechanical fixing methods (such as bolt fixing and clamp clamping), there is no need to drill holes in the aluminum plate or perform complicated clamping operations. Just place the suction cup at the appropriate position of the aluminum plate and start the vacuum pump to generate negative pressure to quickly achieve fixation.

[0003] However, the fixing strength of the aluminum plate with the suction cup depends on factors such as the size of the negative pressure and the contact area between the suction cup and the aluminum plate. When the negative pressure provided by the vacuum system is unstable, the aluminum plate is deformed, and the surface cleanliness and flatness of the aluminum plate do not meet the requirements, the suction cup adsorption force will be unstable and cannot provide sufficient fixing force, resulting in the processing accuracy not meeting the requirements. Therefore, a monitoring device is required to monitor the working status of the suction cup. Summary of the invention

[0004] The present application proposes a monitoring device for the adsorption stability of a suction cup used for aluminum plate processing, which utilizes the pressure difference generated by leakage to drive the movement of a movable plug, and determines the flow of air into a monitor through the switching frequency of the movable plug, so that leakage is easy to observe.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a monitoring device for the adsorption stability of a suction cup for aluminum plate processing, comprising a suction cup platform, the suction cup platform is connected to a negative pressure tank, the negative pressure tank is connected to a vacuum pump, a control valve is arranged between the negative pressure tank and the suction cup platform, the control valve is a two-position three-way valve, the control valve connects the suction cup platform to the atmosphere or to the negative pressure tank, a gas-liquid separator is arranged between the control valve and the negative pressure tank, a monitor is arranged between the gas-liquid separator and the suction cup platform, the monitor comprises a shell, a filter cartridge is arranged in the shell, a monitoring cartridge is arranged in the filter cartridge, an inflow cavity is formed between the filter cartridge and the shell, the inflow cavity is connected to the suction cup platform or the control valve through an air inlet, a negative pressure cavity is formed between the monitoring cartridge and the filter cartridge, a movable plug is arranged in the monitoring cartridge, the movable plug divides the interior of the filter cartridge into two monitoring cavities, the negative pressure cavity is connected to the two monitoring cavities through a reversing valve, the negative pressure cavity is kept in communication with one of the monitoring cavities through the reversing valve, and when the movable plug moves to the extreme position on one side, the reversing valve switches to connect the negative pressure cavity with the other monitoring cavity.

[0006] Furthermore, the shell is arranged transversely, and the shell, the filter cartridge, the monitoring cartridge and the monitoring cartridge are coaxial, so gravity has no effect on the movement of the reversing valve, and no additional setting or algorithm is required to eliminate the effect of gravity on the reversing valve.

[0007] Furthermore, both ends of the monitoring tube are provided with a liquid collecting box, the liquid collecting box collects the liquid in the monitoring cavity, and the gas outlet is communicated with the liquid collecting box.

[0008] Furthermore, the shell is made of a transparent material, and both ends of the filter cartridge are provided with a transparent section. The shell is transparent and the filter cartridge is partially transparent, so that the movement state of the movable plug can be observed, so as to judge the stability of the suction cup platform when adsorbing the aluminum plate with the naked eye.

[0009] Furthermore, the reversing valve is arranged on the movable plug, and the reversing valve includes a valve body that penetrates the movable plug, the valve body is fixedly connected to the movable plug, a valve core is movably connected in the valve body, and the valve core is connected to a driving structure. When the valve core moves to the extreme position on one side, the driving structure drives the valve core to move to the other end.

[0010] Furthermore, the driving structure includes two magnets respectively arranged at both ends of the valve core, and switching columns are provided at both ends of the monitoring tube corresponding to the positions of the magnets. The switching columns are wedge irons, and the switching columns are attracted to the magnets. When the valve core moves to the extreme position on one side, the magnetic force causes the valve core to move, and the valve body is connected to the negative pressure chamber through a hose.

[0011] Furthermore, the driving structure includes an electromagnet arranged in the middle of the valve body, a permanent magnet is provided on the valve core, the switching column is a round rod, and a corresponding push switch is provided at the end of the valve body. When the push switch contacts the switching column, the electromagnet is energized to generate magnetic force to drive the valve core to move. When the push switches at both ends of the valve body are respectively connected, the current passing through the electromagnet is in opposite directions.

[0012] Furthermore, a sensing device is provided on at least one end of the switching column, and the sensing device is connected to an alarm device. The sensing device can monitor the approach and departure of the moving plug, and then obtain the frequency of the moving plug. When the frequency is greater than a preset value, it is judged that the stability is insufficient, and the alarm device issues a warning reminder.

[0013] The beneficial effects of the present invention are as follows:

[0014] The present application provides a monitoring device for the adsorption stability of a suction cup used for aluminum plate processing. In addition to using a pressure gauge to monitor the negative pressure value, the pressure difference generated by the leakage is used to drive the movement of a movable plug. The airflow flowing into the monitor is judged by the switching frequency of the movable plug, and then the sealing condition between the suction cup platform and the aluminum plate is monitored. That is, when the moving frequency of the movable plug is higher than the set value, it is judged that the vacuum speed cannot meet the requirement, thereby realizing the monitoring of the stability of the suction force of the suction cup.

[0015] Both monitoring chambers are connected to the negative pressure tank, and one monitoring chamber always maintains a suction state, that is, while generating a pressure difference to drive the movable plug to move, it does not interfere with normal suction, thereby ensuring the suction efficiency. At the same time, the negative pressure tank has a large volume and can provide buffering. Instantaneous leakage due to vibration will not cause a large change in pressure in the suction cup platform, thereby ensuring that the adsorption force has a high stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without creative work:

[0017] Figure 1 It is a schematic diagram of the monitor in the present invention;

[0018] Figure 2 is a schematic diagram of the present invention;

[0019] Figure 3 is a three-dimensional schematic diagram of a monitor in the present invention;

[0020] Figure 4 A partial cross-sectional view of the monitor in the present invention;

[0021] Figure 5 It is a schematic diagram of a movable plug in the first embodiment of the present invention;

[0022] Figure 6 It is a schematic diagram of the movable plug in the second embodiment of the present invention.

[0023] In the figure: 1. Suction cup platform; 2. Control valve; 3. Monitor; 31. Shell; 32. Air outlet; 33. Air inlet; 34. Filter cartridge; 35. Monitoring cartridge; 36. Moving plug; 37. Negative pressure chamber; 38. Monitoring chamber; 39. Reversing valve; 3901. Valve body; 3902. Valve core; 3903. Magnet; 3904. Electromagnet; 3905. Permanent magnet; 310. Switching column; 311. Hose; 312. Liquid collection box; 313. Inflow chamber; 4. Gas-liquid separator; 5. Negative pressure tank. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] For example, see Figure 1-Figure 3 A monitoring device for the adsorption stability of a suction cup for aluminum plate processing includes a suction cup platform 1, the suction cup platform 1 is connected to a negative pressure tank 5, the negative pressure tank 5 is connected to a vacuum pump, the vacuum pump puts the negative pressure tank 5 in a negative pressure state, the negative pressure tank 5 provides negative pressure for the suction cup platform 1, the negative pressure tank 5 is large in volume, has a large buffering effect, and can make the negative pressure more stable, a control valve 2 is arranged between the negative pressure tank 5 and the suction cup platform 1, the control valve 2 is a two-position three-way valve, one station connects the suction cup platform 1 to the atmosphere to destroy the negative pressure state of the suction cup platform 1, and the other station connects the suction cup platform 1 to the negative pressure tank 5 is connected to make the suction cup platform 1 in a negative pressure state to suck the aluminum plate. A gas-liquid separator 4 is provided between the control valve 2 and the negative pressure tank 5. Since cutting fluid is usually required when processing the aluminum plate, the suction cup platform 1 will inhale some cutting fluid. The gas-liquid separator 4 separates the cutting fluid in the gas to prevent the cutting fluid from entering the negative pressure tank 5. The gas outlet of the gas-liquid separator 4 is connected to the negative pressure tank 5. A monitor 3 is provided between the gas-liquid separator 4 and the suction cup platform 1. The monitor 3 can be arranged between the suction cup platform 1 and the control valve 2, or between the control valve 2 and the gas-liquid separator 4.

[0026] The monitor 3 includes a housing 31, a filter cartridge 34 is arranged in the housing 31, a monitoring cartridge 35 is arranged in the filter cartridge 34, two ends of the filter cartridge 34 are fixedly connected to the housing 31, the filter cartridge 34 is provided with a support frame to provide support for the monitoring cartridge 35, an inflow cavity 313 is formed between the filter cartridge 34 and the housing 31, the inflow cavity 313 is connected to the suction cup platform 1 or the control valve 2 through the air inlet 33, a mixture of gas, cutting fluid and debris flows into the inflow cavity 313, the debris is filtered out by the filter cartridge 34, and the monitoring A negative pressure chamber 37 is formed between the control cylinder 35 and the filter cylinder 34. A movable plug 36 is provided in the monitoring cylinder 35. The movable plug 36 can move freely. The movable plug 36 divides the interior of the filter cylinder 34 into two monitoring chambers 38. The negative pressure chamber 37 is connected to the two monitoring chambers 38 through a reversing valve 39. The monitoring chamber 38 is a two-position three-way valve. The two stations respectively connect the negative pressure chamber 37 with one monitoring chamber 38. When the negative pressure chamber 37 is connected to one of the monitoring chambers 38, the airflow sucked from the suction cup platform 1 When the movable plug 36 moves to the extreme position on one side, the reversing valve 39 switches another station to connect the negative pressure chamber 37 with the other monitoring chamber 38, and the movable plug 36 moves in the opposite direction. When there is no air leakage on the suction cup platform 1, the air pressure in the monitoring chambers 38 on both sides is the same. When there is air leakage, there is a pressure difference between the monitoring chambers 38 on both sides, and the movable plug 36 moves left and right repeatedly. The more serious the air leakage is, the greater the pressure difference on both sides of the movable plug 36 is, and the higher the moving speed and moving frequency of the movable plug 36 are. The amount of air leakage is judged by the moving speed and moving frequency of the movable plug 36, and then the stability of the suction cup adsorption is judged. A pressure gauge is provided on the top of the shell 31 to monitor the negative pressure in the suction cup platform 1.

[0027] The shell 31 is arranged horizontally, which means that the axis of the shell 31 is horizontal, and the shell 31, the filter cartridge 34, the monitoring cartridge 35 and the monitoring cartridge 35 are coaxial. Gravity has no effect on the movement of the movable plug 36, and no additional setting or algorithm is required to eliminate the effect of gravity on the movable plug 36.

[0028] See also Figure 3 and Figure 4 Both ends of the monitoring tube 35 are provided with a liquid collection box 312, which is connected to the monitoring chamber 38. The liquid collection box 312 is lower than the lowest point of the monitoring chamber 38, and the air outlet 32 ​​is connected to the liquid collection box 312. When the cutting fluid is sucked into the monitoring chamber 38, the cutting fluid flows into the liquid collection box 312 to avoid excessive cutting fluid remaining in the monitoring chamber 38 and affecting the movement of the movable plug 36.

[0029] The shell 31 is made of a transparent material, and a transparent section is provided at both ends of the filter cartridge 34. The shell 31 is transparent and the filter cartridge 34 is partially transparent, so that the movement state of the movable plug 36 can be observed, so that the stability of the suction cup platform 1 when adsorbing the aluminum plate can be judged with the naked eye. At the same time, the amount of cutting fluid in the liquid collecting box 312 can also be observed. When the cutting fluid in the liquid collecting box 312 is obviously more, it can also be judged that there is a big problem with the sealing of the suction cup platform 1.

[0030] See also Figure 3 and Figure 5 The reversing valve 39 is arranged on the movable plug 36. The reversing valve 39 includes a valve body 3901 penetrating the movable plug 36. The valve body 3901 is fixedly connected to the movable plug 36. A valve core 3902 is movably connected in the valve body 3901. Magnets 3903 are arranged at both ends of the valve core 3902. Switching columns 310 are arranged at the positions corresponding to the magnets 3903 at both ends of the monitoring tube 35. The switching column 310 is a wedge iron. The switching column 310 and the magnet 3903 are attracted to each other. When the movable plug 36 moves to the receiving end, the switching column 310 is attracted to the magnet 3903. When close to the switching column 310, the suction force causes the valve core 3902 to move. When the valve core 3902 moves to the extreme position, this end of the valve core 3902 is connected to the negative pressure chamber 37. When the valve core 3902 moves to the other end, the other end of the valve core 3902 is connected to the negative pressure chamber 37. The middle part of the valve body 3901 is connected to the negative pressure chamber 37 through the hose 311. The hose 311 does not hinder the movement of the movable plug 36. In other embodiments, the switching column 310 is a magnet and the magnet 3903 can also be a wedge iron.

[0031] Embodiment 2: In embodiment 1, the suction force between the magnet 3903 and the switching column 310 will affect the movement of the movable plug 36. Embodiment 2 is based on embodiment 1 and changes the driving structure of the driving valve core 3902. Please refer to Figure 6 An electromagnet 3904 is provided in the middle of the valve body 3901, a permanent magnet 3905 is provided on the valve core 3902, the switching column 310 is a round rod, and a corresponding push switch is provided at the end of the valve body 3901. When the push switch contacts the switching column 310, the electromagnet 3904 is energized to generate magnetic force, which generates electromagnetic force on the permanent magnet 3905, driving the valve core 3902 to move. When the push switches at both ends of the valve body 3901 are respectively connected, the current passing through the electromagnet 3904 is in opposite directions, that is, when the left side is connected and energized, an attraction force is generated between the electromagnet 3904 and the permanent magnet 3905, driving the valve core 3902 to move to one side. When the other side is connected and energized, a repulsive force is generated between the electromagnet 3904 and the permanent magnet 3905, driving the valve core 3902 to move to the other side. The magnetic force will not affect the movement of the movable plug 36, ensuring that the movable plug 36 reacts sensitively to changes in the pressure difference.

[0032] Embodiment 3: Embodiment 1 and Embodiment 2 have poor consistency through naked eye observation. Based on Embodiment 1 or Embodiment 2, Embodiment 3 adds a device for monitoring the moving frequency of the moving plug 36. At least one end of the switching column 310 is provided with a sensing device, and the sensing device is connected to an alarm device. The alarm device can issue an early warning in the form of ringing a bell, lighting a light, etc. The switching column 310 can monitor the approach and distance of the moving plug 36, and then obtain the frequency of the moving plug 36. When the frequency is greater than the preset value, it is judged that the stability is insufficient, and the alarm device issues an early warning reminder. When the reversing valve 39 is the structure of Embodiment 1, the sensing device is an induction coil, and the induction coil senses the approach and distance of the magnet 3903 through magnetic force changes. When the reversing valve 39 is the structure of Embodiment 2, the sensing device determines the movement of the valve core 3902 by sensing the current on and off of the electromagnet 3904.

[0033] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A monitoring device for the adsorption stability of a suction cup for aluminum plate processing, comprising a suction cup platform (1), wherein the suction cup platform (1) is connected to a negative pressure tank (5), wherein the negative pressure tank (5) is connected to a vacuum pump, wherein a control valve (2) is provided between the negative pressure tank (5) and the suction cup platform (1), wherein the control valve (2) is a two-position three-way valve, wherein the control valve (2) enables the suction cup platform (1) to be connected to the atmosphere or to the negative pressure tank (5), wherein a gas-liquid separator (4) is provided between the control valve (2) and the negative pressure tank (5), and wherein a monitor (3) is provided between the gas-liquid separator (4) and the suction cup platform (1), wherein the device is characterized in that: The monitor (3) comprises a housing (31), a filter cartridge (34) is arranged in the housing (31), a monitoring cartridge (35) is arranged in the filter cartridge (34), an inflow chamber (313) is formed between the filter cartridge (34) and the housing (31), the inflow chamber (313) is communicated with the suction cup platform (1) or the control valve (2) through the air inlet (33), a negative pressure chamber (37) is formed between the monitoring cartridge (35) and the filter cartridge (34), and the monitoring cartridge (313) is connected to the suction cup platform (1) or the control valve (2) through the air inlet (33). 5) is provided with a movable plug (36), the movable plug (36) divides the interior of the filter cartridge (34) into two monitoring chambers (38), the negative pressure chamber (37) is connected to the two monitoring chambers (38) through a reversing valve (39), the negative pressure chamber (37) is kept in communication with one of the monitoring chambers through the reversing valve (39), and when the movable plug (36) moves to the extreme position on one side, the reversing valve (39) is switched to make the negative pressure chamber (37) communicate with the other monitoring chamber.

2. The device for monitoring the adsorption stability of a suction cup for aluminum plate processing according to claim 1, characterized in that: The housing (31) is arranged transversely, and the housing (31), the filter cartridge (34), the monitoring cartridge (35) and the monitoring cartridge (35) are coaxial.

3. The device for monitoring the adsorption stability of a suction cup for aluminum plate processing according to claim 2, characterized in that: Both ends of the monitoring tube (35) are provided with a liquid collecting box (312), the liquid collecting box (312) collects the liquid in the monitoring cavity (38), and the gas outlet (32) is in communication with the liquid collecting box (312).

4. The device for monitoring the adsorption stability of a suction cup for aluminum plate processing according to claim 2, characterized in that: The shell (31) is made of a transparent material, and both ends of the filter cartridge (34) are provided with a transparent section.

5. The device for monitoring the adsorption stability of a suction cup for aluminum plate processing according to claim 2, characterized in that: The reversing valve (39) is arranged on the movable plug (36), and the reversing valve (39) includes a valve body (3901) that penetrates the movable plug (36), the valve body (3901) is fixedly connected to the movable plug (36), a valve core (3902) is movably connected in the valve body (3901), and the valve core (3902) is connected to a driving structure. When the valve core (3902) moves to the extreme position on one side, the driving structure drives the valve core (3902) to move to the other end.

6. The device for monitoring the adsorption stability of a suction cup for aluminum plate processing according to claim 5, characterized in that: The driving structure includes two magnets (3903) respectively arranged at the two ends of the valve core (3902). The two ends of the monitoring tube (35) are provided with switching columns (310) corresponding to the positions of the magnets (3903). The switching column (310) is a wedge iron. The switching column (310) and the magnet (3903) attract each other. When the valve core (3902) moves to the extreme position on one side, the magnetic force causes the valve core (3902) to move, and the valve body (3901) is connected to the negative pressure chamber (37) through the hose (311).

7. The device for monitoring the adsorption stability of a suction cup for aluminum plate processing according to claim 5, characterized in that: The driving structure comprises an electromagnet (3904) arranged in the middle of the valve body (3901), a permanent magnet (3905) is provided on the valve core (3902), the switching column (310) is a round rod, and a corresponding push switch is provided at the end of the valve body (3901). When the push switch contacts the switching column (310), the electromagnet (3904) is energized to generate magnetic force to drive the valve core (3902) to move. When the push switches at both ends of the valve body (3901) are respectively connected, the direction of the current passing through the electromagnet (3904) is opposite.

8. A device for monitoring the adsorption stability of a suction cup for aluminum plate processing according to claim 6 or 7, characterized in that: A sensing device is provided on at least one end of the switching column (310), and the sensing device is connected to an alarm device. The sensing device can monitor the approach and distance of the moving plug (36), and then obtain the frequency of the moving plug (36). When the frequency is greater than a preset value, it is judged that the stability is insufficient, and the alarm device issues a warning reminder.

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