Automatic plate splicing device for door plate machining

Abstract

The invention provides an automatic plate splicing device for door plate machining, and relates to the technical field of door plate machining, the automatic plate splicing device comprises a base provided with a groove and a splicing groove, and a gluing unit which comprises a first sliding block driven by a first motor and provided with a glue valve and a duckbilled scraper blade is arranged in the groove; a push plate which is driven by a second motor through a bevel gear set and provided with a first pressure sensor is arranged in the splicing groove, a plurality of auxiliary pressing assemblies comprising pressing plates with second pressure sensors are arranged above the splicing groove, and a lifting bottom plate driven by a hydraulic rod is arranged below the splicing groove. The PLC control terminal coordinately controls the follow-up sectional pressing and fixing operation that the gluing assembly, the pushing assembly, the extruding assembly and the auxiliary pressing assembly are sequentially pressed downwards to be kept according to signals of the infrared induction sensor and the pressure sensor, so that the board is effectively prevented from rebounding before glue liquid curing, and the splicing quality is improved.

Description

Technical Field

[0001] This invention relates to the field of door panel processing technology, specifically to an automatic splicing device for door panel processing. Background Technology

[0002] As a key component in furniture and architectural decoration, the quality of door panels directly affects the appearance, strength, and service life of the finished product. When manufacturing large-format door panels, due to the limitations of raw material size, it is often necessary to combine multiple smaller boards into a whole through splicing. Traditional door panel splicing relies on manual labor to align, apply glue, and press the boards together, which results in problems such as high labor intensity, low efficiency, and unstable quality of splicing seams. With the development of intelligent manufacturing technology, "automatic board splicing devices" that can automatically complete board conveying, gluing, and alignment have emerged. These devices aim to replace manual operations with mechanization and preliminary automation, thereby improving production efficiency and consistency, and have become an important piece of equipment in the modern wood processing industry.

[0003] For example, the Chinese patent publication "Automatic Panel Splicing Device" (application number CN202021802732.X) includes a workbench, a support column below the workbench, a first track and conveying assembly on the workbench, an adhesive application assembly on the workbench, and a controller on the side of the workbench. The conveying assembly includes a first trolley, a first motor, and a push plate. The adhesive application assembly includes a bracket, a second track on top of the bracket, a second trolley on the second track, a second motor connected to the second trolley, a cylinder on the second trolley, a piston rod on the cylinder, and an adhesive spraying assembly at the end of the piston rod. The piston rod passes through the trolley, through a slot, and extends to the workbench. A glue tank connected to the adhesive spraying assembly via an adhesive inlet pipe is located on the side of the workbench. The adhesive spraying assembly includes a nozzle connected to the adhesive inlet pipe. A pressure sensor controls the start and stop of adhesive spraying, ensuring precise and efficient control. The scraper in the adhesive spraying assembly ensures the cleanliness of the non-splicing surfaces of the panels during adhesive application. An exhaust hood and other components remove volatile components from the adhesive during application, preventing air pollution.

[0004] However, the above-mentioned technical solution focuses on the automatic conveying and gluing of the boards. Although it achieves automatic spraying and spreading of the adhesive and has an exhaust structure to improve the environment, the device only uses baffles to roughly align the boards and relies on the simple pushing force of the pusher to make the boards come into contact with each other. It lacks precise control over the extrusion pressure and curing process during splicing. More importantly, after the device completes the pushing of a board, the pushing component resets. The spliced ​​boards only rely on the initial tack of the adhesive to maintain their position. Under the continuous pushing of subsequent boards or the influence of equipment vibration, they are very prone to rebound or misalignment before the adhesive is fully cured, resulting in cracks or unevenness in the splicing seam and reducing the splicing quality. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an automatic panel splicing device for door panel processing, which can effectively solve the problems in the background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automatic splicing device for door panel processing, comprising a base and support legs fixedly installed below the base. The base has two grooves and a splicing groove located between the two grooves. An adhesive applicator is provided in the groove, and the adhesive applicator includes an adhesive applicator component slidably disposed in the groove. A push plate is provided in the splicing groove, and a through groove is provided below the splicing groove. A liftable base plate is provided in the through groove, and the base plate is driven to lift by several hydraulic rods. Multiple auxiliary pressure components are provided directly above the splicing groove. A PLC control terminal for controlling the coordinated action of each component is also fixedly installed on the base. Sliding grooves are provided on the inner walls of both sides of the splicing groove.

[0007] Preferably, the glue application unit includes a first support frame fixedly installed in the groove. A glue tank and a first motor are fixedly installed on the first support frame. A glue pump is provided on the glue tank. A first lead screw driven by the first motor is also rotatably installed on the first support frame. A first slider is fitted on the first lead screw. A glue valve and a duckbill scraper are installed on the first slider. The duckbill scraper has a glue outlet communicating with the glue valve. The glue pump is connected to the glue valve through a glue delivery hose. An infrared sensor is fixedly installed in each groove.

[0008] Preferably, the push plate includes a push plate body, and the two sides of the push plate body are slidably disposed in the groove by a second slider.

[0009] Preferably, the push plate further includes a second lead screw rotatably disposed in the slide groove, and the second slider is threadedly engaged with the second lead screw.

[0010] Preferably, the push plate further includes a drive mechanism for driving the second lead screw to rotate. The drive mechanism includes a second motor fixedly mounted on the base, and the output shaft of the second motor is connected to one end of the second lead screw through a bevel gear set.

[0011] Preferably, the bevel gear set includes a first bevel gear fixedly installed at the end of the second lead screw, a second bevel gear meshing with the first bevel gear, a rotating column fixed coaxially with the second bevel gear, a third bevel gear fixed at the end of the rotating column, a fourth bevel gear meshing between the two third bevel gears, and the output shaft of the second motor fixedly connected to the fourth bevel gear.

[0012] Preferably, a first pressure sensor is fixedly installed on the outer wall of one side of the pusher plate body used to press the plate.

[0013] Preferably, the auxiliary pressure assembly includes a second support frame fixedly installed on the base, and an electric push rod is fixedly installed on the second support frame. The telescopic end of the electric push rod is vertically downward and fixedly connected to a pressure plate.

[0014] Preferably, a second pressure sensor is fixedly installed on the bottom surface of the pressure plate.

[0015] Preferably, the PLC control terminal is electrically connected to the first motor, glue pump, glue valve, second motor, hydraulic rod, and electric push rods in each of the auxiliary pressure components. The PLC control terminal is also configured to receive signals from the first pressure sensor and the second pressure sensor, and control the coordinated operation of each component according to a preset program.

[0016] This invention provides an automatic panel splicing device for door panel processing. It has the following advantages:

[0017] (1) When splicing is required in this invention, the boards to be spliced ​​are placed in the splicing groove. The pusher first pushes the boards to the predetermined glue application position between the two grooves. When the glue application process begins, the first motor drives the first slider to leave the groove. When the infrared sensor installed in the groove can no longer detect the first slider, the PLC control terminal immediately starts the glue pump and glue valve. The glue pump pumps the glue liquid in the glue tank to the glue valve through the glue delivery hose. At the same time, the first motor drives the first lead screw to rotate, so that the first slider, which is equipped with the glue valve and the duckbill scraper, moves from one groove to another. At this time, the first slider passes through the splicing groove. When the first slider leaves the groove, the glue outlet of the duckbill scraper aligns with the side of the board, and the glue valve is open. Glue is discharged from the duckbill scraper's outlet to the side of the board, where it is smoothed by the scraper to form a uniform glue layer. When the first slider moves into the groove on the other side, the infrared sensor there detects it, and the PLC control terminal shuts off the glue pump and glue valve, completing the glue application for a single board. The PLC control terminal then restarts the pusher plate, which pushes the glued board forward for compression. When the first pressure sensor detects the preset pressure, the PLC control terminal controls the auxiliary pressure at the corresponding position. The component operates by driving the electric push rod to press down the pressure plate, pressing it against the joint of the two panels. At this point, a portion of both panels is pressed down by the pressure plate, and a second pressure sensor maintains stable pressure, securing the joint to the base plate. In the initial, non-pressed position, the lower end face of the pressure plate in each auxiliary pressing component is close to the upper surface of the panel, providing auxiliary guidance for the panel's movement. This process is repeated, cyclically executing the gluing, pushing, squeezing, and pressing processes. The corresponding auxiliary pressing components press down and hold sequentially, forming a follow-up segmented pressing mechanism. After all panels are joined, all auxiliary pressing components are raised. The hydraulic rod drives the base plate to descend in order to remove the finished product. The first piece of material can be manually controlled without applying glue or auxiliary pressure and is directly pushed to the front end of the base plate as a reference. Subsequent pieces of material are then glued, spliced, and segmented pressed in sequence. Through a follow-up segmented pressing mechanism, each time a piece of material is extruded and spliced, the corresponding auxiliary pressure component automatically presses down and holds it. The pressing effect of subsequent components is superimposed in sequence, thereby forming a continuous and increasing pressing force on the spliced ​​parts throughout the splicing process. This effectively prevents the springback of the material caused by uncured glue and equipment reset, thus improving the splicing quality.

[0018] (2) The present invention uses the linkage between infrared sensor and PLC control terminal to accurately control the start and stop of glue pump and glue valve, and with the synchronous scraping action of duckbill scraper, ensures the uniformity of glue coating on the side of board. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 In this invention Figure 1 A magnified structural diagram at point A;

[0021] Figure 3 This is a schematic diagram of the rear view structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the push plate in this invention;

[0023] Figure 5 This is a top view of the push plate structure in this invention;

[0024] Figure 6 This is a schematic diagram of the auxiliary pressure assembly in this invention;

[0025] Figure 7 This is a schematic diagram of the internal structure of the auxiliary pressure component in this invention.

[0026] The components include: 1. Base; 2. Support leg; 3. Groove; 4. First support frame; 5. Adhesive tank; 6. First motor; 7. Adhesive pump; 8. Adhesive hose; 9. First lead screw; 10. First slider; 11. Adhesive valve; 12. Duckbill scraper; 13. Adhesive outlet; 14. Splicing groove; 15. Push plate; 1501. Push plate body; 1502. Second slider; 1503. Second lead screw; 1504. First bevel gear; 1505. Second bevel gear; 150 6. Rotating column; 1507. Third bevel gear; 1508. Fourth bevel gear; 1509. Second motor; 1510. First pressure sensor; 16. Slide groove; 17. Through groove; 18. Base plate; 19. Hydraulic rod; 20. PLC control terminal; 21. Auxiliary pressure assembly; 2101. Second support frame; 2102. Electric push rod; 2103. Pressure plate; 2104. Second pressure sensor; 2105. Plate; 22. Infrared sensor. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] like Figures 1 to 3As shown, this embodiment of the invention provides an automatic splicing device for door panel processing, including a base 1 and a support leg 2 fixedly installed below the base 1. The base 1 is provided with two grooves 3 and a splicing groove 14 located between the two grooves 3. An adhesive application unit is provided in the groove 3, and the adhesive application unit includes an adhesive application execution component slidably disposed in the groove 3. A push plate 15 is provided in the splicing groove 14. A through groove 17 is provided below the splicing groove 14. A base plate 18 that can be raised and lowered is provided in the through groove 17. The base plate 18 is driven to rise and fall by several hydraulic rods 19. A plurality of auxiliary pressure components 21 are provided directly above the splicing groove 14. A PLC control terminal 20 for controlling the coordinated action of each component is also fixedly installed on the base 1. Sliding grooves 16 are provided on the inner walls of both sides of the splicing groove 14.

[0029] The glue application unit includes a first support frame 4 fixedly installed in the groove 3. A glue tank 5 and a first motor 6 are fixedly installed on the first support frame 4. A glue pump 7 is installed on the glue tank 5. A first lead screw 9 driven by the first motor 6 is also rotatably installed on the first support frame 4. A first slider 10 is fitted on the first lead screw 9. A glue valve 11 and a duckbill scraper 12 are installed on the first slider 10. The duckbill scraper 12 is provided with a glue outlet 13 communicating with the glue valve 11. The glue pump 7 is connected to the glue valve 11 through a glue delivery hose 8. An infrared sensor 22 is fixedly installed in each groove 3.

[0030] like Figure 4 and Figure 5 As shown, the push plate 15 includes a push plate body 1501, and the two sides of the push plate body 1501 are slidably disposed in the slide groove 16 via the second slider 1502.

[0031] The push plate 15 also includes a second lead screw 1503 rotatably disposed in the slide groove 16, and the second slider 1502 is threadedly engaged with the second lead screw 1503;

[0032] The push plate 15 also includes a drive mechanism for driving the second lead screw 1503 to rotate. The drive mechanism includes a second motor 1509 fixedly mounted on the base 1. The output shaft of the second motor 1509 is connected to one end of the second lead screw 1503 through a bevel gear set.

[0033] The bevel gear set includes a first bevel gear 1504 fixedly installed at the end of the second lead screw 1503, a second bevel gear 1505 meshing with the first bevel gear 1504, a rotating column 1506 fixed coaxially with the second bevel gear 1505, a third bevel gear 1507 fixed at the end of the rotating column 1506, a fourth bevel gear 1508 meshing between the two third bevel gears 1507, and the output shaft of the second motor 1509 fixedly connected to the fourth bevel gear 1508.

[0034] The pusher body 1501 is used to press the outer wall of one side of the plate, on which the first pressure sensor 1510 is fixedly installed.

[0035] Through the above technical solution, in order to achieve the pushing and controllable extrusion of the sheet metal, the PLC control terminal 20 starts the second motor 1509. The output shaft of the second motor 1509 drives the fourth bevel gear 1508 to rotate. The power is transmitted to the rotating columns 1506 on both sides through the two third bevel gears 1507 meshing with it, which in turn drive the second bevel gear 1505 to rotate. The second bevel gear 1505 meshes with the first bevel gear 1504 fixed to the end of the second lead screw 1503, thereby driving the second lead screw 1503 to rotate in the slide groove 16. The second slider 1502, which is threaded with the second lead screw 1503, converts the rotational motion into linear motion, driving the push plate body 1501 to move smoothly along the slide groove 16, and thus... The sheet material is pushed forward in the splicing groove 14 until it contacts the sheet material in front or the inner wall of the splicing groove 14. During this process, the first pressure sensor 1510 installed on the extrusion side of the pusher body 1501 monitors the contact pressure in real time. When the pressure reaches the preset threshold, the signal is fed back to the PLC control terminal 20, which controls the second motor 1509 to stop. This provides a precise and stable extrusion foundation for the subsequent follow-up segmented pressing. After the auxiliary pressing component 21 at the corresponding position completes the pressing action, the PLC control terminal 20 controls the second motor 1509 to rotate in the opposite direction, driving the pusher body 1501 back to the initial position, preparing for the pushing and extrusion operation of the next sheet material, thereby realizing a continuous automated splicing cycle.

[0036] like Figure 6 and Figure 7 As shown, the auxiliary pressure assembly 21 includes a second support frame 2101 fixedly installed on the base 1, an electric push rod 2102 fixedly installed on the second support frame 2101, and the telescopic end of the electric push rod 2102 is vertically downward and fixedly connected to a pressure plate 2103.

[0037] A second pressure sensor 2104 is fixedly installed on the bottom surface of the pressure plate 2103.

[0038] Through the above technical solution, in order to achieve follow-up segmented compression and effectively prevent the springback and misalignment of the panels during the splicing process, when the push plate 15 pushes the glued panels to complete the compression splicing, and the pressure detected by the first pressure sensor 1510 reaches the preset value, the PLC control terminal 20 immediately sends a command to the auxiliary pressure component 21 at the corresponding splicing position to control its electric push rod 2102 to move, driving the pressure plate 2103 to press down vertically, so that the bottom surface of the pressure plate 2103 moves towards the splicing seam area of ​​the front and rear panels, pressing down the splicing point of the two panels. At this time, a portion of both panels is pressed down by the pressure plate 2103, thereby compressing the two panels. During the pressing process, the second pressure sensor 2104 installed on the bottom surface of the pressure plate 2103 monitors the pressing force in real time and feeds the signal back to the PLC control terminal 20. The PLC control terminal 20... The electric push rod 2102 is dynamically adjusted to maintain a preset stable pressure, thereby firmly pressing the spliced ​​part onto the base plate 18. During this process, the pressure plate 2103 of the auxiliary pressure component 21 remains locked after being pressed down. After each new board is spliced, the corresponding auxiliary pressure component 21 performs the same pressing and holding action in sequence. The pressing force of all the activated auxiliary pressure components 21 works together to form an incremental and continuous segmented pressing of the spliced ​​board segments. When all the boards are spliced ​​and the adhesive is fully cured, the PLC control terminal 20 controls all the electric push rods 2102 to retract synchronously, driving each pressure plate 2103 to lift and reset. During this process, the lower end face of the pressure plate 2103 in the initial lifted position is close to the upper surface of the board, which can also play an auxiliary guiding and limiting role during the board pushing process.

[0039] Working principle:

[0040] When splicing is required in this invention, the boards to be spliced ​​are placed in the splicing groove 14. The pusher plate 15 first pushes the boards to the predetermined glue application position between the two grooves 3. When the glue application process begins, the first motor 6 drives the first slider 10 to leave the groove 3. When the infrared sensor 22 installed in the groove 3 no longer detects the first slider 10, the PLC control terminal 20 immediately starts the glue pump 7 and the glue valve 11. The glue pump 7 pumps the glue liquid in the glue tank 5 to the glue valve 11 through the glue delivery hose 8. At the same time, the first motor 6 drives the first lead screw 9 to rotate, so that the first lead screw 9, which is equipped with the glue valve 11 and the duckbill scraper 12, rotates. The slider 10 moves from one groove 3 to another groove 3. At this time, the first slider 10 passes through the splicing groove 14. When the first slider 10 leaves the groove 3, the glue outlet 13 of the duckbill scraper 12 is aligned with the side of the board, and the glue valve 11 is in the open state. The glue liquid is discharged from the glue outlet 13 of the duckbill scraper 12 to the side of the board and is smoothed by the duckbill scraper 12 to form a glue layer of uniform thickness. When the first slider 10 moves and enters the groove 3 on the other side, the infrared sensor 22 at that location senses the first slider 10, and the PLC control terminal 20 shuts down the glue pump 7 and the glue valve 11. The glue application of a single board is completed.

[0041] Subsequently, the PLC control terminal 20 starts the second motor 1509, which drives the second lead screw 1503 to rotate through the bevel gear set. This causes the second slider 1502 to drive the pusher plate body 1501 to push the glued sheet forward for compression. When the first pressure sensor 1510 detects the preset pressure, the PLC control terminal 20 controls the corresponding auxiliary pressure component 21 to operate. The electric push rod 2102 drives the pressure plate 2103 to press down, pressing the joint of the two sheets together. At this time, a portion of both sheets is pressed down by the pressure plate 2103, and the second pressure sensor 2104 maintains a stable pressure, pressing the joint onto the base plate 18. In the initial position before pressing down, the lower end face of the pressure plate 2103 in each auxiliary pressure component 21 is close to the upper surface of the sheet, which can play an auxiliary guiding role in pushing and moving the sheet. Then the process repeats. The above operation cycle the processes of gluing, pushing, squeezing, and pressing. The corresponding auxiliary pressing components 21 press down and hold in sequence, forming a follow-up segmented pressing mechanism. After all the panels are spliced, all auxiliary pressing components 21 are raised, and the hydraulic rod 19 drives the base plate 18 to descend so that the finished product can be removed. The first panel can be manually controlled to not be glued or pressed, and is directly pushed to the front end of the base plate 18 as a reference. Subsequent panels are then glued, spliced, and segmented pressed in sequence. Through the follow-up segmented pressing mechanism, that is, after each panel is squeezed and spliced, the corresponding auxiliary pressing component 21 automatically presses down and holds. The pressing effect of the subsequent components is superimposed in sequence, thereby forming a continuous and increasing pressing force on the spliced ​​part throughout the splicing process. This effectively prevents the panel rebound caused by the uncured glue and equipment reset, thus improving the splicing quality.

[0042] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. An automatic splicing device for door panel processing, comprising a base (1) and support legs (2) fixedly installed below the base (1), characterized in that: The base (1) is provided with two grooves (3) and a splicing groove (14) located between the two grooves (3). A glue application unit is provided in the groove (3). The glue application unit includes a glue application execution component that is slidably disposed in the groove (3). A push plate (15) is provided in the splicing groove (14). A through groove (17) is provided below the splicing groove (14). A base plate (18) that can be raised and lowered is provided in the through groove (17). The base plate (18) is driven to rise and fall by several hydraulic rods (19). Multiple auxiliary pressure components (21) are provided directly above the splicing groove (14). A PLC control terminal (20) for controlling the coordinated action of each component is also fixedly installed on the base (1). Sliding grooves (16) are provided on the inner walls of both sides of the splicing groove (14).

2. The automatic splicing device for door panel processing according to claim 1, characterized in that: The glue application unit includes a first support frame (4) fixedly installed in the groove (3). A glue tank (5) and a first motor (6) are fixedly installed on the first support frame (4). A glue pump (7) is provided on the glue tank (5). A first lead screw (9) driven by the first motor (6) is also rotatably installed on the first support frame (4). A first slider (10) is provided on the first lead screw (9). A glue valve (11) and a duckbill scraper (12) are installed on the first slider (10). A glue outlet (13) communicating with the glue valve (11) is provided on the duckbill scraper (12). The glue pump (7) is connected to the glue valve (11) through a glue delivery hose (8). An infrared sensor (22) is fixedly installed in each groove (3).

3. The automatic panel splicing device for door panel processing according to claim 2, characterized in that: The push plate (15) includes a push plate body (1501), and the two sides of the push plate body (1501) are slidably disposed in the slide groove (16) by the second slider (1502).

4. The automatic splicing device for door panel processing according to claim 3, characterized in that: The push plate (15) also includes a second lead screw (1503) rotatably disposed in the slide groove (16), and the second slider (1502) is threadedly engaged with the second lead screw (1503).

5. The automatic splicing device for door panel processing according to claim 4, characterized in that: The push plate (15) also includes a drive mechanism for driving the second lead screw (1503) to rotate. The drive mechanism includes a second motor (1509) fixedly mounted on the base (1). The output shaft of the second motor (1509) is connected to one end of the second lead screw (1503) through a bevel gear set.

6. An automatic panel splicing device for door panel processing according to claim 5, characterized in that: The bevel gear set includes a first bevel gear (1504) fixedly installed at the end of the second lead screw (1503), a second bevel gear (1505) meshing with the first bevel gear (1504), and a rotating column (1506) fixed coaxially with the second bevel gear (1505). A third bevel gear (1507) is fixed at the end of the rotating column (1506). A fourth bevel gear (1508) meshes between the two third bevel gears (1507). The output shaft of the second motor (1509) is fixedly connected to the fourth bevel gear (1508).

7. An automatic panel splicing device for door panel processing according to claim 6, characterized in that: The pusher body (1501) is equipped with a first pressure sensor (1510) fixedly mounted on one outer wall of the side used to extrude the plate.

8. An automatic panel splicing device for door panel processing according to claim 7, characterized in that: The auxiliary pressure assembly (21) includes a second support frame (2101) fixedly installed on the base (1), and an electric push rod (2102) fixedly installed on the second support frame (2101). The telescopic end of the electric push rod (2102) is vertically downward and fixedly connected to a pressure plate (2103).

9. An automatic panel splicing device for door panel processing according to claim 8, characterized in that: A second pressure sensor (2104) is fixedly installed on the bottom surface of the pressure plate (2103).

10. An automatic panel splicing device for door panel processing according to claim 9, characterized in that: The PLC control terminal (20) is electrically connected to the first motor (6), glue pump (7), glue valve (11), second motor (1509), hydraulic rod (19) and electric push rod (2102) in each of the auxiliary pressure components (21). The PLC control terminal (20) is also configured to receive signals from the first pressure sensor (1510), the second pressure sensor (2104) and the infrared sensor (22), and control the coordinated operation of each component according to a preset program.

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