Multi-batch and multi-step safe conveying method for flammable and explosive workpieces

Abstract

The invention discloses a multi-batch and multi-step safe conveying method for flammable and explosive workpieces, which comprises an annular circulating type conveying system, the annular circulating type conveying system comprises seven stations, namely a workpiece feeding station, a spherical surface spraying station, a small hole spraying station, a film thickness detecting station, a leveling station, a code spraying station and a workpiece discharging station which are annularly arranged, and the seven stations are connected and circulated through a translation trolley. And stable transportation of flammable and explosive workpieces is achieved.

Description

Technical Field

[0001] The invention relates to the fields of control technology and safety technology, and more specifically to a method for safely conveying multi-batch and multi-step flammable and explosive workpieces. Background Art

[0002] Each process of the existing coating process is operated by manual unit devices and manually transported, which cannot realize the automatic transportation of flammable and explosive workpieces between processes. In addition, manual operation has low efficiency and poor safety. Summary of the invention

[0003] The present invention provides a multi-batch and multi-step inflammable and explosive workpiece safe conveying method, in order to solve the technical problems existing in the background technology.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A multi-batch, multi-step method for safely conveying inflammable and explosive workpieces comprises an annular circulation conveying system, wherein the annular circulation conveying system comprises seven workstations arranged in an annular shape, namely, loading, spherical spraying, small hole spraying, film thickness detection, leveling, coding, and unloading. The stable transportation of inflammable and explosive workpieces is achieved by connecting and circulating a translation trolley.

[0006] In some embodiments, the annular circulation conveying system includes two moving lines, two parallel transfer machines, and a docking trolley; the parallel transfer machine realizes the switching of workpieces of the tooling plate between the two lines, and the docking trolley is fixed on the parallel transfer machine to realize the transition of the tooling plate of the main line to the parallel transfer machine.

[0007] In some embodiments, when a work station has operation requirements such as spraying, inspection, coding, loading and unloading, the flammable and explosive workpiece is lifted up and separated from the moving line; when the operation is completed, the flammable and explosive workpiece is lowered, and when the release conditions are met, it is released to the next work station.

[0008] In some embodiments, the stable transportation of flammable and explosive workpieces is achieved by translating the trolley docking cycle, including:

[0009] Run at high speed to the pickup location;

[0010] Switch to low-speed motion;

[0011] Stop lateral movement and wait for incoming materials;

[0012] Connecting card board;

[0013] Run to the subsequent workstation at high speed;

[0014] Switch to low-speed motion;

[0015] Stop lateral movement and wait for the subsequent workstation to be free;

[0016] Send out the pallet;

[0017] Run to the material receiving station

[0018] Enter the next cycle.

[0019] In some embodiments, when flammable and explosive workpieces are transported with the pallet between the main line and the parallel transfer machine, the pallet needs to make a 90° turn, and the main line and the parallel transfer machine are aligned using triple sensors: an electromechanical travel switch, a photoelectric switch, and a mechanical travel switch.

[0020] In some embodiments, (1) dual sensors are used for alignment: electromechanical travel switch and photoelectric switch; the two sensors are in place at the same time, serving as alignment signals for the parallel transfer machine, and after alignment, the line body is ready to release flammable and explosive workpieces;

[0021] (2) Use mechanical travel switches for limit positioning; if the most extreme situation occurs: both sensors or control circuits fail and the line continues to move, the mechanical travel switch will stop the line movement;

[0022] (3) Alarm: If only one sensor has a signal or both sensors have no signal, an alarm will be triggered and the system will wait for manual processing.

[0023] In some embodiments, the safety control of the parallel transfer machine includes:

[0024] (1) The parallel transfer machine is equipped with two deceleration switches for receiving and delivering pallets. The middle stroke is fast and the upstream and downstream are slow. When the connection reaches the deceleration switch, it slows down to a slow speed to achieve a smooth connection.

[0025] (2) If the time to reach the first deceleration switch and the second deceleration switch is greater than 2 seconds, an alarm will be issued and the movement will be stopped;

[0026] (3) If the machine fails to reach the final position after reaching the deceleration switch for more than 8 seconds, an alarm will be sounded and the movement will stop;

[0027] (4) After reaching the first deceleration switch for 2 seconds, the machine still fails to reach the second deceleration switch, an alarm is triggered and the machine stops moving;

[0028] (5) If the trolley has not reached its final position after working for more than 20 seconds, an alarm will be sounded and the movement will stop.

[0029] Compared with the background technology, the present invention has the following beneficial effects:

[0030] The purpose of the present invention is to provide a multi-batch and multi-step safe transportation method for flammable and explosive workpieces, which greatly improves production efficiency and safety. It realizes the automatic batching of multiple flammable and explosive workpieces in multiple steps, and the continuous and cyclic operation of 7 workstations completes the automatic transportation of flammable and explosive workpieces between the processes of spherical spraying, small hole spraying, coating thickness detection, leveling, and product number printing. Since flammable and explosive workpieces are flammable and explosive products, in order to ensure the safety of flammable and explosive workpieces during transportation, safety control is carried out from multiple dimensions such as mechanical, electrical, operation process, work flow, safety interlock, alarm, and overturning force to ensure the safety of automatic transportation of flammable and explosive workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the circular circulation conveying system;

[0032] Figure 2 Conveying control process;

[0033] Figure 3 Schematic diagram of line limit switch. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0035] The following will be combined Figure 1-3 It is worth noting that the following embodiments are only used to explain the present application and do not constitute a limitation on the present application.

[0036] Example

[0037] A multi-batch, multi-step method for safely conveying inflammable and explosive workpieces comprises an annular circulation conveying system, wherein the annular circulation conveying system comprises seven workstations arranged in an annular shape, namely, loading, spherical spraying, small hole spraying, film thickness detection, leveling, coding, and unloading. The stable transportation of inflammable and explosive workpieces is achieved by connecting and circulating a translation trolley.

[0038] The circular circulation conveying system includes two moving lines, two parallel transfer machines, and a docking trolley; the parallel transfer machine realizes the workpiece switching of the tooling plate between the two lines, and the docking trolley is fixed on the parallel transfer machine to realize the transition from the main line tooling plate to the parallel transfer machine.

[0039] When the workstation has operation requirements such as spraying, testing, coding, loading and unloading, the flammable and explosive workpiece will be lifted up and separated from the moving line; after the operation is completed, the flammable and explosive workpiece will be lowered, and when the release conditions are met, it will be released to the next workstation.

[0040] The circular circulation conveying system is the basic condition for completing the automatic transportation of inflammable and explosive workpieces between the processes of spherical spraying, small hole spraying, coating thickness detection, leveling, and product number printing, and realizes the automatic batching of multiple inflammable and explosive workpieces and their continuous and cyclic operation. Multiple processes are batched according to actual production needs, and each batch of products can execute any of the steps. The system's process flow is executed sequentially according to the process steps selected for batching. The stable transportation of inflammable and explosive workpieces is achieved by connecting the translation trolley in a loop. It includes 7 stations for loading, spherical spraying, small hole spraying, film thickness detection, leveling, coding, and unloading.

[0041] The circular design can enable the precise positioning and automatic switching of any flammable and explosive workpiece at the workstation, and realize the same direction and speed movement of flammable and explosive workpieces. The circular circulation conveying system mainly includes two lines, two parallel transfer machines, and a docking trolley. The parallel transfer machine realizes the switching of the tooling plate between the two lines. The docking trolley is fixed on the parallel transfer machine, and can realize the transition from the tooling plate of the main line to the parallel transfer machine. When the workstation has the requirements of spraying, inspection, coding, loading and unloading, etc., the flammable and explosive workpiece will be lifted and separated from the moving line. After the operation is completed, the flammable and explosive workpiece will be lowered, and when the release conditions are met, it will be released to the next workstation. See the schematic diagram of the circular circulation conveying system. Figure 1 .

[0042] See the conveying control process Figure 2 , including: waiting, receiving the plate, moving forward, receiving the plate, delivering the plate, delivering the plate, receiving the material, and receiving the material. In some embodiments, the stable transportation of flammable and explosive workpieces is achieved by the transfer trolley docking cycle, including:

[0043] Run at high speed to the pickup location;

[0044] Switch to low-speed motion;

[0045] Stop lateral movement and wait for incoming materials;

[0046] Connecting card board;

[0047] Run to the subsequent workstation at high speed;

[0048] Switch to low-speed motion;

[0049] Stop lateral movement and wait for the subsequent workstation to be free;

[0050] Send out the pallet;

[0051] Run to the material receiving station

[0052] Enter the next cycle.

[0053] After the inflammable and explosive workpieces, tooling, and pallet components are assembled, they are placed on the conveyor line. Before the workpieces are sprayed, the workpieces, tooling, and pallets must be accurately positioned. Accurate positioning is a prerequisite to ensure that the workpieces will not be tilted and fall during the lifting process, thereby avoiding damage, combustion, and explosion of inflammable and explosive workpieces.

[0054] The accurate positioning of the card plate is ensured by the double positioning of the blocking cylinder and the rotating clamping cylinder. The error of the positioning hole of the tooling relative to the positioning pin is less than 1mm, which can ensure that the positioning pin is inserted into the positioning hole, thereby further accurately positioning the workpiece.

[0055] During the operation of the conveying system, since flammable and explosive workpieces are explosives, it is not allowed to touch the flammable and explosive workpieces, so as to avoid damage, combustion and explosion of the flammable and explosive workpieces. Anti-touch is ensured from the following three dimensions.

[0056] (1) All three robots are equipped with force sensors to monitor the contact force of the nozzle in real time. Once the contact force exceeds 5N, an alarm will be sounded and the robot will stop moving.

[0057] (2) All three robots are equipped with laser ranging sensors to monitor the distance between the nozzle and the flammable and explosive workpiece in real time. Once the distance is less than 3 mm, an alarm will be triggered and the robot will stop moving.

[0058] See the schematic diagram of the line limit switch Figure 3 .

[0059] When the flammable and explosive workpieces are transported between the main line body 6 and the parallel transfer machine with the pallet, the pallet needs to turn 90 degrees. If the main line body and the parallel transfer machine are not aligned or even not aligned, the explosive parts will tilt and slip from the conveyor line, causing combustion and explosion. Therefore, the correct alignment of the main line body and the parallel transfer machine is a key signal that affects the safety of the conveyor line system. Use triple sensor alignment: electromechanical travel switch 4, photoelectric switch 5, mechanical travel switch 3.

[0060] (1) Use dual sensors for alignment: electromechanical travel switch and photoelectric switch. The two sensors are in place at the same time, serving as the alignment signal for the parallel transfer machine. After alignment, the line is ready to release flammable and explosive workpieces.

[0061] (2) Use mechanical travel switches for extreme limit setting. If the most extreme situation occurs: both sensors or control circuits fail and the machine continues to move, the mechanical travel switch will stop the machine from moving.

[0062] (3) Alarm: If only one sensor has a signal or both sensors have no signal, an alarm will be triggered and the system will wait for manual processing.

[0063] The safety control of the parallel transfer machine is mainly designed in the control program. It mainly includes:

[0064] (1) The parallel transfer machine is equipped with two deceleration switches for receiving and delivering pallets. The middle stroke is fast and the upstream and downstream are slow. When the connection reaches the deceleration switch, it slows down to achieve the purpose of smooth connection.

[0065] (2) If the time between the first deceleration switch 2 and the second deceleration switch 1 is greater than 2 seconds, an alarm is triggered and the movement is stopped.

[0066] (3) If the machine fails to reach the final position after reaching the deceleration switch for more than 8 seconds, an alarm will be sounded and the movement will stop.

[0067] (4) After reaching the first deceleration switch for 2 seconds, the machine still fails to reach the second deceleration switch, and an alarm is sounded and the movement stops.

[0068] (5) If the trolley has not reached its final position after working for more than 20 seconds, an alarm will be sounded and the movement will stop.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-batch, multi-step method for safely conveying inflammable and explosive workpieces, characterized in that: It includes an annular circulation conveying system, which includes 7 workstations arranged in a ring shape, namely, loading, spherical spraying, small hole spraying, film thickness detection, leveling, coding, and unloading. The system realizes stable transportation of flammable and explosive workpieces through the transfer trolley connection cycle.

2. A multi-batch, multi-step, flammable and explosive workpiece safe transportation method according to claim 1, characterized in that: The circular circulation conveying system includes two moving lines, two parallel transfer machines, and a docking trolley; the parallel transfer machine realizes the workpiece switching of the tooling plate between the two lines, and the docking trolley is fixed on the parallel transfer machine to realize the transition from the main line tooling plate to the parallel transfer machine.

3. A multi-batch, multi-step, flammable and explosive workpiece safe transportation method according to claim 2, characterized in that: When the workstation needs to spray, inspect, print, load or unload workpieces, the flammable and explosive workpieces will be lifted up and separated from the moving line; when the work is completed, the flammable and explosive workpieces will be lowered and released to the next workstation when the release conditions are met.

4. A multi-batch, multi-step, flammable and explosive workpiece safe transportation method according to claim 2, characterized in that: The stable transportation of flammable and explosive workpieces is achieved by the translation trolley docking cycle, including: Run at high speed to the pickup location; Switch to low-speed motion; Stop lateral movement and wait for incoming materials; Connecting card board; Run to the subsequent workstation at high speed; Switch to low-speed motion; Stop lateral movement and wait for the subsequent workstation to be free; Send out the pallet; Run to the material receiving station Enter the next cycle.

5. The multi-batch, multi-step, inflammable and explosive workpiece safe transportation method according to claim 2, characterized in that: When flammable and explosive workpieces are transported with the pallet between the main line and the parallel transfer machine, the pallet needs to turn 90°, and the main line and the parallel transfer machine are aligned using triple sensors: electromechanical travel switch, photoelectric switch, and mechanical travel switch.

6. A multi-batch, multi-step, safe transportation method for flammable and explosive workpieces according to claim 5, characterized in that: The main line body and the parallel transfer machine are aligned using a triple sensor, including: (1) Use dual sensors for alignment: electromechanical travel switch and photoelectric switch; the two sensors are in place at the same time, serving as the alignment signal for the parallel transfer machine. After alignment, the line is ready to release flammable and explosive workpieces; (2) Use mechanical travel switches for limit positioning; if the most extreme situation occurs: both sensors or control circuits fail and the line continues to move, the mechanical travel switch will stop the line from moving; (3) Alarm: If only one sensor has a signal or both sensors have no signal, an alarm will be triggered and the system will wait for manual processing.

7. The multi-batch, multi-step, inflammable and explosive workpiece safe transportation method according to claim 2, characterized in that: Safety controls for parallel transfer machines include: (1) Parallel transfer machine receiving and delivering pallet stroke, equipped with two deceleration switches; to achieve fast intermediate stroke, The upstream and downstream are connected at a slow speed; when the connection reaches the deceleration switch, it is reduced to a slow speed to achieve the purpose of smooth connection; (2) If the time to reach the first deceleration switch and the second deceleration switch is greater than 2 seconds, an alarm will be issued and the movement will be stopped; (3) If the machine fails to reach the final position after reaching the deceleration switch for more than 8 seconds, an alarm will be sounded and the movement will stop; (4) After reaching the first deceleration switch for 2 seconds, the machine still fails to reach the second deceleration switch, an alarm is triggered and the machine stops moving; (5) If the trolley has not reached its final position after working for more than 20 seconds, an alarm will be sounded and the movement will stop.

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