Application and design principles of an integrated automatic stereoscopic Library

In automobile manufacturing enterprises, in order to improve the overall capacity, a auto body auto stereo library is set up between welding, coating and assembly to store the "semi-finished product" in the upstream workshop, and the automatic transmission line is connected with the three production workshops to realize the integrated library of the three-dimensional library and the workshop.

1. On the integrated auto body Library

In automobile manufacturing enterprises, there are three main production workshops: welding workshop, painting workshop and assembly workshop. In a conditional factory, in order to improve the overall capacity of the whole plant, a auto body auto stereo library can be set up between the three large production workshops to store the "semi-finished product" in the upstream workshop, and the three production workshops are rigidly connected by the automatic transmission line to realize the integrity of the stand storehouse and the workshop.

1, the application of integrated three-dimensional library body production process.

After the body is welded in the welding workshop, the body not sprayed can be temporarily stored in the storage area through the transmission line corridor. In order to meet the economy of mass painting, the white body can be rearranged and rearranged according to the color, and then through the corridor into the painting workshop to finish the spraying; also, after the body is sprayed in the painting workshop, the body can be temporarily stored in the reservoir area by the corridor between the painting workshop and the painting workshop; finally, the body can be temporarily stored in the reservoir area; finally, the body can be temporarily stored in the reservoir area; finally, the body can be temporarily stored in the reservoir area; finally, the body can be temporarily stored in the reservoir area; finally, the body can be temporarily stored in the reservoir area; finally, the body can be temporarily stored in the reservoir area; finally, the body can be temporarily stored in the reservoir area; finally, the body can be temporarily stored in the reservoir area; finally, the body can be temporarily stored in the reservoir area; finally, the body can be temporarily stored in the reservoir area. After painting, the body is sorted out again according to the order order of the assembly shop, and then assembled into the assembly shop.

2. The functions of the integrated stereoscopic Library

If the integrated stereo library is compared to a reservoir, the production workshop in the upper and lower reaches is compared to the intake pipe and the outlet pipe. It can be seen that the integrated three-dimensional warehouse mainly takes two functions:

(1) buffer storage to meet the production rhythm difference between the upstream and downstream workshops.

(2) the re ordering of incoming and downstream can meet the needs of downstream workshop.

The size of the storage capacity is not only to meet the difference in the production rhythm of the upstream and downstream production workshops, but also to meet the temporary change of the order, so that the capacity of the library has the function of buffer transformation to ensure the normal production. But it is not too big to avoid the waste of the early investment. Therefore, it is always a difficult problem to estimate the reasonable capacity of integrated stereo library.

Two, the design principle of buffer stock for integrated solid Library

In the production logistics, there are two main reasons for the temporary storage of WIP. One is the difference between the upstream production workshop and the downstream production workshop; two, the input and output speed of the upstream and downstream production workshops is different. In the design plan, we should consider the two reasons and calculate the corresponding buffer stock respectively.

Three, the design principle of reordering inventory in integrated solid warehouse.

In order to balance the contradiction between the flexibility of supplier production and the order change in the assembly shop order, a certain amount of inventory level can be maintained in the reservoir area so as to timely provide the body that meets the requirements of the order. This inventory level is the reordering stock. As with the buffer stock, if the inventory is too high, the equipment investment and daily operation cost will be wasted. The difference is that when the reordering stock is too low, there will be a situation where the inventory is clearly in the order of the original order, but there is no car available because of the failure of the order matching. At present, the most common design principle of reordering inventory is to estimate reasonable reordering stock by creating data models and Simulation of body processes.