Recently, China's first AGV (Automated Guided Vehicle) axle assembly line was formally put into operation at China National Heavy Duty Truck Group Bridge Box Company. The application of AGV technology enables high precision control of product quality controllability.
In the second venture, China Zhongqi Bridge Box Co., Ltd. has actively promoted the improvement of lean logistics, constantly adjusted and optimized logistics distribution, and further promoted the logistics module. As of now, the logistics system has been initially realized with specialization, punctuality, and stability.
The first is to select part A type parts (brake drums, hubs, shoe joints, etc.) to implement "shun quoted" and require parts suppliers to order in a specified time according to the order of axle assembly. Parts are delivered to the axle assembly line. Large brake drums in the PC area of ​​the assembly department were originally delivered without order, and the logistics was distributed according to the total number of scheduled productions per day. There was no time limit, and sometimes there was no delivery of brake drums on the production line, while there were many brake drums of other models. The phenomenon of waiting for the brake drum and stopping the line often occurs, which seriously affects the production tempo and makes the production intermittent.
In addition, there are too many brake drums for distribution and occupy an effective space in the PC area. Through the smooth operation of investment, we have established and improved logistics site management standards, reduced on-line inventory, realized synchronous operation of assembly line, packaging line, and tripartite logistics distribution. The accuracy of spare parts distribution reached 100%, and improved the stability of logistics distribution. Sex and efficiency.
The second is to formulate the trial operation plan of the C part of the assembly department. The standard parts were changed from the original zero vote to the whole package delivery. The assembly department and logistics center reorganized the details of the C-class parts, and combined with the actual production in the previous period, formulated the standards for large-scale packaging or small-package packaging. On this basis, the company's lean office in conjunction with the logistics center, information room to adjust the assembly department standard parts distribution.
At the same time, it issued the “Circular on the Adjustment of the Distribution Methods for Standard Parts of the Assembly Departmentâ€, and strictly implemented the “3+1†scheduling mode, scheduling plans, adjusting process details, sending cargo information, and preparation and delivery of tripartite logistics. The rigging and on-line delivery time of the assembly department PC area is strictly regulated and the receiving process is standardized. After the adjustment, the time for stocking is reduced and work efficiency is improved.
The third is to select the pilot line to design the production system through on-site investigations and discussions. Bridge Box Company's production methods, handling methods, store size, inventory quantity, and production line kanban operation rules of the pilot production line make the logistics of the production line smoother, the number of work-in-process products and the number of stores reduced; The device can meet the quality requirements and meet the requirements of the production system.
Through the design of the store, the number of in-process products was greatly reduced. Among them, the knifing process of the sun gear production line of the seventh workshop was reduced from 404 pieces to 40 pieces, and the lathe process was reduced from 600 pieces to 100 pieces. From 1,440 pieces to 120 pieces; through the improvement of the feeding tray and the hot-feeding basket station equipment, the collision between the workpieces is effectively prevented, and the product quality is improved. Through the improvement of lean logistics, China Zhongqi Bridge Box Company has initially realized the specialization, punctuality, and stability of the logistics system.
In order to control and change the influence of human factors on product quality, China Heavy Truck Bridge Box Co., Ltd. took the lead in the application of AGV production line assembly technology in the domestic axle assembly process. The AGV line has a production design capacity of 600 pieces per day. The application of the AGV technology not only enables the drive axle assembly line to achieve automation and three-dimensional logistics delivery. The work site is beautiful, the viewing angle is improved, the floor space is reduced, and more importantly, This assembly technology has completely changed the operator's work behavior and working methods, so that the product quality controllability has been highly accurate.
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