The basic content of shortening production cycle in JIT mode

The length of the production cycle has a significant impact on the productivity, it is from the production of parts into the finished product output of the entire process, and the JIT production of the synchronization is to shorten the production cycle of the very effective means &http://www.aliyun.com/zixun/ Aggregation/37954.html ">nbsp; The so-called production synchronization is the process of machining and the process of assembly line almost at the same time in the operation, and this operation is parallel, through Kanban, transfer the requirements of the General Assembly line, but also make all parts of the production line at the necessary time, for the assembly line to provide the necessary products. In order to shorten the production cycle, the JIT method requires each process is not set up inventory, the previous process is finished immediately sent to the next process, which has no inventory links, this approach is also known as "one thing first-class." This transmission between processes enables the entire production cycle to be bridged, reducing the transport and inventory processes, and shortening production time.   Reduce the time to change tooling can shorten the cycle, tooling is the production process tools, such as knives, molds and so on. To replace the product, but also to change the tooling, and the time to replace the tooling is a kind of no value to create a loss of time, but also a waste. So JIT mode of production requires the change of tooling as soon as possible to reduce time consumption.   Specifically, the whole process of production synchronization can be achieved through such means. Reasonable arrangement and arrangement of   equipment. The cluster arrangement method is the most common equipment arrangement method in the machine factory, the so-called cluster arrangement method is to put together the same type of machine tool equipment, such as all milling machines together, the disadvantage of this kind of way is that because there is no necessary connection between the processes, So when the product is produced, it is stacked directly beside the lathe, this is also not conducive to the whole production of effective control   JIT method that the products required after the process of the previous process of other products in the batch processing has not been completed before the start, this period of time the equipment is idle, become the equipment waiting time , thus prolonging the whole production cycle. Therefore, in the JIT mode of production, the equipment is not according to the type of machine tool layout, but according to the processing of the workpiece sequence layout, that is, the formation of mutually connected equipment layout.   This arrangement according to the process of equipment arrangement must be balanced production, or excess or shortage is still a regular phenomenon, these need to make the equipment more simple, tooling replacement time shortened and site effective arrangements to solve.   Shorten the time to change the job. Single-piece production and single-piece transportation can effectively realize parallel production and synchronization, and it is also an ideal state. This is easy to achieve in the assembly line and machining processes, but in casting, forging, and other specific technical requirements of the process, batch production is the most effective way.  JIT production requirements to reduce the volume, which makes the whole operation of the replacement process seems very complex. So in order to realize the requirement of JIT production mode, it is necessary to shorten the idle time and waiting time in the whole process, the key problem is how to shorten the whole operation time, make the production process more compact, the production efficiency is improved, and the operation time is composed of three parts.   1, internal time. Is the problem of part production in the process of operation, it must be carried out through the downtime.   2, external time. For the replacement of some of the production process tooling, such as molds, measuring, etc., can be completed without downtime, this time is called the external time.   3, Adjustment time. At the end of the production process, to the production of products for sampling inspection and quality inspection, but also to the whole production process adjustment, these time is the completion of the work adjustment time. The specific methods for shortening the time of operation of   include: to improve the working ability of the operators, through the "versatile" training so that they can in a relatively short period of time to complete the task of the original longer time, improve the working methods, the original work procedures for innovation and adjustment; using some simpler and more convenient tooling, Reduce tooling adjustment time; Some tooling can be prepared prior to the production process without affecting the entire work time. It has been proved that the JIT production mode of job replacement time is feasible, and can be achieved. The reduction of the production batch produced by the shortening of the   job replacement time can not only reduce the production cycle between the processes, but also reduce the capital occupancy in the production process, reduce the production cost, improve the competitiveness of the enterprise products, and also improve the working efficiency. As you can see, productivity gains can be achieved not only by introducing state-of-the-art high-performance equipment or by spending other large amounts of money, but also by studying the production process to eliminate waste in the production process. The basis of this method and JIT production mode "eliminate all waste" the core idea is consistent.   Yongkaida APs to solve the scheduling problems that cannot be satisfied by ERP Http://www.yukontek.com,APS Production planning management expert 400-076-7600,021-68886010