Vacuum adsorption automatic control system and method based on flexible processing production line

Abstract

The invention belongs to the technical field of machining adsorption devices, and particularly relates to a vacuum adsorption automatic control system and method based on a flexible machining production line. According to the technical scheme, the vacuum adsorption automatic control system based on the flexible machining production line comprises a vacuum adsorption device, the vacuum adsorption device is connected with an automatic connecting device, the automatic connecting device is connected with a vacuum source, the automatic connecting device is further electrically connected with a vacuum automatic controller, and the vacuum automatic controller is electrically connected with a machine tool. The invention provides a vacuum adsorption automatic control system and method based on a flexible machining production line. Automatic control over the machining process of small-batch and multi-variety thin plate parts through the flexible machining production line is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical processing adsorption devices, and in particular relates to a vacuum adsorption automatic control system and method based on a flexible processing production line. Background Art

[0002] Thin-walled parts with a thickness of less than 10mm generally have the characteristics of thin walls, special shapes, poor rigidity, and easy deformation during processing. Ordinary clamping methods cannot guarantee product quality. At present, vacuum suction cups + vacuum pumps are widely used at home and abroad to form a vacuum adsorption system to clamp thin plate parts. For large-scale automated processing production lines, special vacuum adsorption tooling is used. However, this type of special vacuum suction cup requires the design and customization of a large number of special suction cups in the processing of small-batch and multi-variety parts, which has certain limitations and is difficult to be widely used in the field of mechanical processing.

[0003] In actual use, traditional vacuum adsorption still has the following problems that need to be improved:

[0004] 1) Vacuum generation and release, parts compression and relaxation are manually performed, which cannot meet the needs of automated production;

[0005] 2) The vacuum degree, cutting amount and adsorption area are set based on experience, the cutting amount is conservative and the processing efficiency is low;

[0006] 3) The residual cutting fluid in the vacuum system cannot be discharged automatically. Summary of the invention

[0007] In order to solve the above problems existing in the prior art, the purpose of the present invention is to provide a vacuum adsorption automatic control system and method based on a flexible processing production line, so as to realize the automatic control of the flexible processing production line for the processing process of small batches and multiple varieties of thin plate parts.

[0008] The technical solution adopted by the present invention is:

[0009] A vacuum adsorption automatic control system based on a flexible processing production line includes a vacuum adsorption device, the vacuum adsorption device is connected to an automatic connection device, the automatic connection device is connected to a vacuum source, the automatic connection device is also electrically connected to a vacuum automatic controller, and the vacuum automatic controller is electrically connected to a machine tool.

[0010] As a preferred embodiment of the present invention, the vacuum automatic controller is provided with a touch screen, and the touch screen supports parameter settings, and the parameter settings include: an upper limit value of the working vacuum degree, a lower limit value of the working vacuum degree, an alarm pressure line and a stop pressure line.

[0011] As a preferred solution of the present invention, the vacuum automatic controller identifies the real-time monitoring signal of vacuum degree and accurately determines the working state of the vacuum adsorption system, and controls the machine tool to suspend processing and the vacuum adsorption system to suspend operation.

[0012] As a preferred solution of the present invention, the vacuum automatic controller exchanges information with the machine tool.

[0013] As a preferred solution of the present invention, when the vacuum degree drops rapidly below a preset value under unexpected circumstances, the vacuum automatic controller controls the spindle to stop moving.

[0014] As a preferred solution of the present invention, a tray is provided at the lower part of the vacuum adsorption device, a base is provided at the lower part of the tray, and a transition plate is installed at the lower part of the base.

[0015] As a preferred embodiment of the present invention, the vacuum adsorption device includes an adsorption device body, on which a plurality of convex columns are arranged, the top surfaces of the convex columns are flat, exhaust holes are arranged in the middle of the convex columns, the exhaust holes are connected to the automatic connection device, the gaps between the convex columns form large exhaust grooves, and a plurality of small exhaust grooves connecting the large exhaust grooves and the exhaust holes are arranged on the tops of the convex columns.

[0016] As a preferred solution of the present invention, the cross-sectional shape of the convex column is rectangular, and each side of the convex column is provided with a small air extraction groove.

[0017] As a preferred solution of the present invention, a liquid accumulation tank is provided in the main body of the adsorption device, and a liquid drainage hole is provided between the liquid accumulation tank and the large air extraction tank.

[0018] A vacuum adsorption automatic control method based on a flexible processing production line comprises the following steps:

[0019] S1: The machine tool waits for the vacuum automatic controller to reply with a completion signal;

[0020] S2: The vacuum automatic controller receives the clamping signal and starts the clamping action;

[0021] S3: Close the destruction valve and drain valve, open all valves except the destruction valve and drain valve, and draw a vacuum;

[0022] S4: The vacuum pressure reaches the parameter setting, and the vacuum automatic controller sends a clamping completion signal to the machine tool;

[0023] S5: The machine tool receives the signal and starts processing parts. During the process, the pressure signal is monitored and the machine stops and waits if an abnormality occurs.

[0024] S6: After the part program is processed, the machine tool sends a release signal and waits for the vacuum automatic controller to reply;

[0025] S7: The vacuum automatic controller closes the conduction valve, opens the breaking valve, and sends a release signal when the pressure drops to the set value;

[0026] S8: The machine tool receives the relaxation reply and completes the program processing.

[0027] The beneficial effects of the present invention are:

[0028] 1. The vacuum adsorption and spindle linkage method proposed in the present invention realizes the information interaction between adsorption processing and production line, solves the problem of automatic control of vacuum adsorption processing, and makes vacuum adsorption processing 100% safe and reliable. For the processing of thin plate parts, the timing of vacuum generation and release is accurately grasped, and the information is timely exchanged with the control system to realize the automatic clamping adsorption and processing of parts; for unexpected situations such as tool damage, processing coordinate errors, vacuum pipeline failure, etc. during the processing of parts, vacuum adsorption and spindle linkage technology is proposed. The vacuum automatic adsorption system automatically sends a signal to the machine tool to stop the spindle and the adsorption system stops vacuuming, solving the problems of parts flying and spindle collision, reaching the domestic leading level, and providing support for the processing of thin plate parts in our institute.

[0029] 2. The breakthrough self-sealing structure filter tank technology of the present invention realizes the automatic separation of air, chips and cutting fluid in the vacuum suction cup adsorption area, and solves the problem of unstable adsorption pressure when restarting after replacing parts in vacuum adsorption processing, which causes potential safety hazards. In view of the fact that when restarting after replacing parts in vacuum adsorption processing, fine chips and corrosive cutting fluid will be sucked into the vacuum adsorption device, causing unstable adsorption pressure and posing potential safety hazards, a self-sealing structure filter tank is designed to realize the automatic separation of air, chips and cutting fluid in the vacuum suction cup adsorption area; to realize the storage of separated chips and cutting fluid; to realize the self-sealing of the filter tank during operation, and to automatically discharge chips and cutting fluid when shut down. It has reached the domestic leading level.

[0030] 3. The adaptive matching technology of vacuum degree, cutting amount and adsorption area achieved by the present invention realizes the matching of changes in vacuum degree, cutting amount and adsorption area, forms a cutting parameter library and solves the problem of reliability of adsorption processing parameters. Once the vacuum adsorption device is fixed, there is a quantitative relationship between vacuum degree, cutting amount and adsorption area. The adaptive parameter matching technology breaks through the key technology of cutting force simulation, and changes different vacuum degrees and adsorption areas to perform cutting tests according to the cutting force corresponding to the cutting amount, forming a cutting parameter library and solving the problem of parameter reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the present invention;

[0032] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0033] Figure 3 is a top view of the vacuum adsorption device;

[0034] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle;

[0035] Figure 5 It is a cross-sectional view of the vacuum adsorption device.

[0036] In the figure: 1-vacuum adsorption device; 2-automatic connection device; 3-tray; 4-base; 5-transition plate; 11-adsorption device body; 12-convex column; 13-exhaust hole; 14-large exhaust groove; 15-small exhaust groove; 16-liquid accumulation groove; 17-drainage hole. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0039] like Figure 1 to Figure 5 As shown, the vacuum adsorption automatic control system based on the flexible processing production line of this embodiment includes a vacuum adsorption device 1, the vacuum adsorption device 1 is connected to an automatic connection device 2, the automatic connection device 2 is connected to a vacuum source, the automatic connection device 2 is also electrically connected to a vacuum automatic controller, and the vacuum automatic controller is electrically connected to the machine tool. A tray 3 is arranged at the bottom of the vacuum adsorption device 1, a base 4 is arranged at the bottom of the tray 3, and a transition plate 5 is installed at the bottom of the base 4.

[0040] Specifically, the vacuum adsorption device 1 includes an adsorption device body 11, on which a plurality of convex columns 12 are arranged, the top surface of the convex columns 12 is a plane, an air extraction hole 13 is arranged in the middle of the convex columns 12, the air extraction hole 13 is connected to the automatic connection device 2, the gap between the convex columns 12 forms a large air extraction groove 14, and the top of the convex columns 12 is provided with a plurality of small air extraction grooves 15 connecting the large air extraction grooves 14 and the air extraction holes 13. The cross-sectional shape of the convex columns 12 is rectangular, and each side of the convex columns 12 is provided with a small air extraction groove 15. A liquid accumulation groove 16 is arranged in the adsorption device body 11, and a liquid drainage hole 17 is arranged between the liquid accumulation groove 16 and the large air extraction groove 14.

[0041] The liquid storage tank 16 is used to store cutting fluid and chips to avoid affecting the flow of compressed air. The large suction tank 14 and the small suction tank 15 are used to increase the part adsorption area. More suction holes 13 are used to quickly generate vacuum and form an adsorption surface of any shape.

[0042] The automatic connection device 2 realizes automatic opening and closing and self-sealing of the vacuum adsorption device 1 and the vacuum source, has the characteristics of simple structure and high reliability, and is suitable for the harsh environment of machine tool processing.

[0043] The vacuum automatic controller automatically controls the operation of the vacuum adsorption clamping device according to processing needs and has the following functions:

[0044] The vacuum automatic controller has a touch screen, supports vacuum parameter settings, and has a constant pressure control function (constant pressure applicable range: -100Kpa~0Kpa, vacuum fluctuation range is less than ±5Kpa). Parameter settings include: working vacuum upper and lower limits, alarm pressure line, and stop pressure line.

[0045] The vacuum automatic controller has the functions of real-time monitoring and alarm of vacuum degree, and has the ability to deal with abnormal situations; it can identify the real-time monitoring signal of vacuum degree and accurately judge the working status of the vacuum adsorption system, and control the machine tool to suspend processing and the vacuum adsorption system to suspend work, and resume processing after the fault is eliminated.

[0046] The vacuum automatic controller has the function of automatic interactive control of processing information; it can exchange information with the machine tool. The specific information interaction process is as follows: first, set the vacuum pressure range value. After the workpiece is pre-installed on the machine tool, start the vacuum adsorption control system to start working. At this time, the machine tool is in a waiting state; the vacuum adsorption system starts to collect and monitor the vacuum degree inside the vacuum suction cup in real time, and starts to evacuate. When the vacuum degree setting value is reached, the vacuum adsorption system sends a control command to start the CNC machine tool to start processing. During the processing, the vacuum system controls the vacuum degree of the suction cup to maintain a constant pressure within the allowable pressure fluctuation range. After the machine tool processing is completed, the machine tool stops working. The vacuum adsorption system can read the machine tool stop command signal, and the vacuum adsorption system automatically releases pressure.

[0047] In the event of an unexpected situation where the vacuum degree rapidly drops below a preset value, the present invention has the function of stopping the spindle and the vacuum automatic controller. During the machining process of the machine tool, if the pressure sensor detects that the vacuum degree of the suction cup has not reached the set lower limit, an alarm will be immediately sounded and all machine tool actions will be stopped. After the personnel have eliminated the fault and reset, the machining can continue.

[0048] The vacuum automatic controller has the function of maintaining pressure after power off for a certain period of time. It meets the processing conditions on machine tools in the workshop, and the vacuum adsorption system ensures 7×24 hours of continuous operation without failure.

[0049] The vacuum adsorption automatic control method based on the flexible processing production line of this embodiment includes the following steps:

[0050] S1: The machine tool executes the M32 code and waits for the vacuum automatic controller to reply with a completion signal;

[0051] S2: The vacuum automatic controller receives the clamping signal and starts the clamping action;

[0052] S3: Close the destruction valve and drain valve, open all valves except the destruction valve and drain valve, and draw a vacuum;

[0053] S4: The vacuum pressure reaches the parameter setting, and the vacuum automatic controller sends a clamping completion signal to the machine tool;

[0054] S5: The machine tool receives the signal and starts processing parts. During the process, the pressure signal is monitored and the machine stops and waits if an abnormality occurs.

[0055] S6: After the part program is processed, the machine tool executes the M33 code, sends a release signal, and waits for the vacuum automatic controller to reply;

[0056] S7: The vacuum automatic controller closes the conduction valve, opens the breaking valve, and sends a release signal when the pressure drops to the set value;

[0057] S8: The machine tool receives the relaxation reply and completes the program processing;

[0058] S9: The vacuum automatic controller waits for the machine tool to issue clamping or other instructions again.

[0059] The vacuum adsorption and spindle linkage method proposed in the present invention realizes the information interaction between adsorption processing and production line, solves the problem of automatic control of vacuum adsorption processing, and makes vacuum adsorption processing 100% safe and reliable. For the processing of thin plate parts, the timing of vacuum generation and release is accurately grasped, and the information is timely interacted with the control system to realize the automatic clamping adsorption and processing of parts; for unexpected situations such as tool damage, processing coordinate errors, vacuum pipeline failure, etc. during the processing of parts, vacuum adsorption and spindle linkage technology is proposed. The vacuum automatic adsorption system automatically sends a signal to the machine tool to stop the spindle and the adsorption system stops vacuuming, which solves the problems of parts flying and spindle collision, reaching the domestic leading level and providing support for the processing of thin plate parts in our institute.

[0060] The breakthrough self-sealing structure filter tank technology of the present invention realizes the automatic separation of air, chips and cutting fluid in the vacuum suction cup adsorption area, and solves the problem of unstable adsorption pressure when restarting after replacing parts in vacuum adsorption processing, which causes potential safety hazards. In view of the fact that when restarting after replacing parts in vacuum adsorption processing, fine chips and corrosive cutting fluid will be sucked into the vacuum adsorption device 1, causing unstable adsorption pressure and posing potential safety hazards, a self-sealing structure filter tank is designed to realize the automatic separation of air, chips and cutting fluid in the vacuum suction cup adsorption area; to realize the storage of separated chips and cutting fluid; to realize the self-sealing of the filter tank during operation, and to automatically discharge chips and cutting fluid when shutting down. It has reached the domestic leading level.

[0061] The invention breaks through the adaptive matching technology of vacuum degree, cutting amount and adsorption area, realizes the matching of changes in vacuum degree, cutting amount and adsorption area, forms a cutting parameter library, and solves the problem of reliability of adsorption processing parameters. Once the vacuum adsorption device 1 is fixed, there is a quantitative relationship between the vacuum degree, cutting amount and adsorption area. The adaptive parameter matching technology breaks through the key technology of cutting force simulation, and according to the cutting force corresponding to the cutting amount, it changes different vacuum degrees and adsorption areas to perform cutting tests, forms a cutting parameter library, and solves the problem of parameter reliability.

[0062] Specific production process:

[0063] 1. Inspection before processing:

[0064] 1.1 Check that there are no obvious scratches on the surface of the blank;

[0065] 1.2 Clean the suction cup before clamping the blank, keep the suction cup surface, sealing groove and ventilation groove clean and free of foreign matter, and the suction cup surface free of scratches;

[0066] 1.3 Before processing, clean the tray 3, base 4, and upper and lower connectors, and keep the base 4 and upper and lower connectors clean and free of foreign matter and scratches on the surface.

[0067] 2. Parts clamping:

[0068] 2.1 The blank clamping and placement generally requires that the four sides are parallel to the four sides of the suction cup;

[0069] 2.2 When clamping, place the blank on the surface of the suction cup according to the requirements of the technical documents, press the blank, use an off-line vacuum source to suck the blank tightly, push the blank manually without movement, fix the blank on the suction cup with screws, and the screw tightening force standard is that the blank does not move when the vacuum source is released and the blank is pushed manually.

[0070] 3. Vacuum adsorption automatic control system settings:

[0071] 3.1 Before using the program, check whether the system program vacuum start command M32 and vacuum release command M33 meet the requirements;

[0072] 3.2 Before processing, turn on the power of the vacuum automatic adsorption clamping system to ensure that the power supply of the vacuum pump and control system is unobstructed;

[0073] 3.3 Set the lower limit of vacuum degree of automatic adsorption clamping system to 80, the upper limit to 85, and the vacuum degree of vacuum pump to 92. Check the above indicators before processing to ensure they meet the requirements.

[0074] 4. Safety precautions:

[0075] 4.1 Before processing, ensure that the sealing ring on the lower connector is intact;

[0076] 4.2 Check the drain cup during the machining process to ensure that it is not filled with coolant and that there are no chips blocking the liquid discharge;

[0077] 4.3 Pay attention to the machine tool status and production line control software alarm status during processing to avoid unexpected events;

[0078] 4.4 After processing, cover the lower connector with the lower connector protection cover to prevent coolant and other foreign matter from entering the lower connector and the gas pipeline connected to it;

[0079] 4.5 After processing is completed, turn off the power supply of the vacuum automatic adsorption clamping system and the vacuum pump;

[0080] 4.6 Check once a week whether the vacuum suction cup and the upper connector are loose, and whether the connection between the lower connector and the turntable bridge plate is loose; do not touch the lower connector during chip cleaning; prevent chips and sharp edges from scratching the human body during blank clamping and parts loading and unloading; ensure the consistency of blank clamping and adsorption status during batch processing.

[0081] The present invention is not limited to the above-mentioned optional implementation modes. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope defined by the claims of the present invention fall within the protection scope of the present invention.

Claims

1. A vacuum adsorption automatic control system based on a flexible processing production line, characterized by: The invention comprises a vacuum adsorption device (1), wherein the vacuum adsorption device (1) is connected to an automatic connection device (2), the automatic connection device (2) is connected to a vacuum source, the automatic connection device (2) is also electrically connected to a vacuum automatic controller, and the vacuum automatic controller is electrically connected to a machine tool.

2. According to claim 1, a vacuum adsorption automatic control system based on a flexible processing production line is characterized in that: The vacuum automatic controller is provided with a touch screen, and the touch screen supports parameter setting, and the parameter setting includes: an upper limit value of the working vacuum degree, a lower limit value of the working vacuum degree, an alarm pressure line and a stop pressure line.

3. According to claim 1, a vacuum adsorption automatic control system based on a flexible processing production line is characterized in that: The vacuum automatic controller identifies the real-time monitoring signal of vacuum degree and accurately determines the working state of the vacuum adsorption system, and controls the machine tool to suspend processing and the vacuum adsorption system to suspend operation.

4. The vacuum adsorption automatic control system based on a flexible processing production line according to claim 1 is characterized in that: The vacuum automatic controller exchanges information with the machine tool.

5. The vacuum adsorption automatic control system based on a flexible processing production line according to claim 1 is characterized in that: In the event of an unexpected situation where the vacuum degree rapidly drops below the preset value, the vacuum automatic controller controls the spindle to stop.

6. The vacuum adsorption automatic control system based on a flexible processing production line according to claim 1 is characterized in that: A tray (3) is arranged at the bottom of the vacuum adsorption device (1), a base (4) is arranged at the bottom of the tray (3), and a transition plate (5) is installed at the bottom of the base (4).

7. The vacuum adsorption automatic control system based on a flexible processing production line according to claim 1 is characterized in that: The vacuum adsorption device (1) comprises an adsorption device body (11), on which a plurality of convex columns (12) are arranged, the top surface of the convex columns (12) is a plane, a suction hole (13) is arranged in the middle of the convex columns (12), the suction hole (13) is connected to the automatic connection device (2), the gap between the convex columns (12) forms a large suction groove (14), and a plurality of small suction grooves (15) connecting the large suction grooves (14) and the suction holes (13) are arranged on the top of the convex columns (12).

8. The vacuum adsorption automatic control system based on the flexible processing production line according to claim 7 is characterized in that: The cross-sectional shape of the convex column (12) is rectangular, and each side of the convex column (12) is provided with a small air extraction groove (15).

9. The vacuum adsorption automatic control system based on a flexible processing production line according to claim 1 is characterized in that: A liquid storage tank (16) is arranged in the adsorption device body (11), and a liquid drainage hole (17) is arranged between the liquid storage tank (16) and the large air extraction tank (14).

10. A vacuum adsorption automatic control method based on a flexible processing production line, using the vacuum adsorption automatic control system based on a flexible processing production line according to claim 1, characterized in that: The following steps are involved: S1: The machine tool waits for the vacuum automatic controller to reply with a completion signal; S2: The vacuum automatic controller receives the clamping signal and starts the clamping action; S3: Close the destruction valve and drain valve, open all valves except the destruction valve and drain valve, and draw a vacuum; S4: The vacuum pressure reaches the parameter setting, and the vacuum automatic controller sends a clamping completion signal to the machine tool; S5: The machine tool receives the signal and starts processing parts. During the process, the pressure signal is monitored and the machine stops and waits if an abnormality occurs. S6: After the part program is processed, the machine tool sends a release signal and waits for the vacuum automatic controller to reply; S7: The vacuum automatic controller closes the conduction valve, opens the breaking valve, and sends a release signal when the pressure drops to the set value; S8: The machine tool receives the relaxation reply and completes the program processing.

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