Design of auxiliary materials and finished product

2022-09-19
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Cigarette factory auxiliary material and finished product logistics system design (Part 2)

4 AGV system

4.1 AGV station setting

A) a total of 5 stations are set for the coiling and packaging unit

b) one station is set for each packing machine

c) location of palletizer in auxiliary material warehouse: the palletizer is placed at the outlet of auxiliary material warehouse, and the empty pallets are sent to the warehouse area by AGV, stacked into groups, and then directly warehoused

d) charging station: it is set near the auxiliary material warehouse, and the number is 3. The charging station is usually used as a waiting station. When the AGV trolley is on standby, the lower automatic charging mode can be used for rapid charging

agv has the function of intelligent control. The exhibition organizer, lizhan Expo Group, has also launched the charging function of the automobile hub and forging exhibition area and the automobile lightweight connection technology development forum. When the battery capacity of the vehicle is consumed to a certain value, the request message will be sent automatically. The system will arrange to charge at the charging station in time. And follow the principle of task priority before completing the work task. If there is no idle charging station, wait in line, and the vehicle will not accept new tasks

the system updates the information of the charging station instantly through the signal line, which can control the car to stop at the specified charging position, pull in the isolating switch and trigger the charging. After charging, command the vehicle to disconnect - disconnect the disconnector in May 2013 and put it into operation. The whole process is fully automated

4.2 workflow

agv service objects include 18 wrapping units and 5 cartoning machines. See Figure 5 for the traveling route of AGV trolley; See Figure 2 for the specific walking route

agv system mainly completes the tasks of delivery of auxiliary materials, empty pallet recovery and material return

a) supplement of auxiliary materials for normal production: the operator of the wrapping unit puts forward the required auxiliary materials through the terminal at the machine, and the upper computer sends the call information to the AGV management and control system, and the system assigns the task to a nearest idle AGV according to the scheduling arrangement. AGV will automatically drive to the warehouse area to pick up the goods according to the optimal path, and then transport the tray of auxiliary materials to the calling unit for unloading, and bring back the empty tray

b) change the brand and return the surplus materials to the warehouse: the upper computer sends the call information to the AGV management and control system, and the system assigns the task to an AGV according to the scheduling arrangement. AGV will first return the remaining auxiliary material pallets on the unit to the warehouse area, and then transport the auxiliary materials required by the unit to the calling unit. The whole process will be completed within 1h to ensure the timely supply of auxiliary materials required by the unit

c) recovery of waste smoke and waste: waste smoke and waste are stored in the waste smoke and waste storage container on the unit during normal production. When it is necessary to recycle waste smoke and waste, the unit operator calls through the terminal. The upper computer will send the call information to the AGV management and control system, and the system will assign the task to an AGV according to the scheduling arrangement and go to the waste smoke and waste disposal area to load the waste smoke and waste recycling container. When the AGV arrives at the calling unit, the operator of the unit will pour the waste smoke and waste materials that cannot reach the unit into the waste smoke and waste containers on the AGV, and then the AGV will send the containers back to the waste smoke and waste disposal area for treatment. The waste smoke and waste disposal area is no longer in this workshop, and an AGV station in the waste smoke and waste disposal area can be set up as required

4.3 AGV number configuration

4.3.1 average handling time of a single AGV

agv the time T1 required to complete a handling instruction at the farthest point (calculated according to the round-trip distance of the operation point of the winding and packaging unit farthest away from the reservoir area) is

where:

d1 - the round-trip distance from the operation point farthest away from the reservoir area (m)

v1 - vehicle speed (m/min), and the average vehicle speed is 50m/min, The time T2 required for the single cycle

agv to complete the handling instruction at the nearest point (calculated according to the round-trip distance of the operation point of the coiling unit closest to the reservoir area) is

, where:

d2 - the round-trip distance from the farthest operation point in the reservoir area (m)

v2 - the vehicle speed (m/min), the average vehicle speed is 40m/min, and the single cycle

agv loading and unloading and waiting time T3 are calculated as 2min on average, The average time t for a single AGV to handle a piece of goods is

4.3.2 the number of AGVs

calculated according to the time for a single AGV to handle a single pallet is 7 min, and the auxiliary material warehouse is equipped with 4 AGVs with an average handling capacity of 34 pallets/h (compound cycle)

the maximum operation demand in actual production is 25 times/h; Four AGVs can meet the production needs, and the operation efficiency is about 74%

the operation demand at the beginning of production on the first day is 60 times (no empty pallet, no surplus material returned), which can be handled 90 minutes in advance

4.4 main technical performance indicators

see Table 3 for main technical performance indicators

4.5 control mode

trolley control is divided into manual and automatic modes. In the manual state, the trolley is separated from the upper position, and the independent operation and control of the trolley can be realized through the on-board control panel or manual controller. The automatic status car is completely managed, dispatched and controlled by the upper computer

4.6 environmental requirements of AGV walking area

a) ground: bearing capacity greater than 1 500kg/m2; Levelness error is less than or equal to ± 3mm; Flatness error is less than or equal to 3/1000; Terrazzo is preferred for ground materials, followed by granite; There is no water, oil or sand on the ground; The ground roughness is less than or equal to 2mm; The ground joint gap is less than or equal to 5mm, the granite joint is less than or equal to 3mm, and the height difference at the joint is less than or equal to 2mm

b) surrounding environment: there should be no bright stainless steel or strongly reflective objects within 1.7 ~ 3M above the ground of the workshop. Matte paint or low reflective materials should be used on the surface of the equipment as far as possible. For local unavoidable situations, appropriate surface attenuation reflection treatment shall be allowed

5 equipment configuration details

see Table 4 for equipment configuration and main technical parameters

6 system features

6.1 the design of this system reflects the progressiveness

the coding disc process uses robots instead of manual simple repetitive labor, and the auxiliary material supply process uses AGV system, so that the modern documents understand the connection and harmony of various processes in the receiving room

6.2 the system can meet the requirements of flexible production

the distribution of auxiliary materials adopts manual mode, which is suitable for multi variety production, and also reduces complex equipment such as shape inspection and recheck

the way of combining manual and handling equipment is adopted for the delivery of finished products, which can adapt to a variety of transportation modes, such as bulk truck and pallet transportation

source: China Electronic Design

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