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The metal stamping parts processed in the metal stamping workshop are an indispensable part of automobile production. The stamping process is the first of the four major processes in automobile production, so the production of the body, painting, and final assembly workshops is directly affected by the stamping workshop. But the stamping workshop is different from other process workshops. The stamping workshop has the characteristics of high process level, large process complexity, large investment scale, multiple production equipment, and long manufacturing cycle. Some characteristics of the stamping workshop are:

1、 Layout of stamping workshop production line

The stamping workshop arranges corresponding production lines based on the overall production capacity of the factory. Due to the different stamping parts required for the product, the number of processes required for metal stamping parts also varies. Each stamping line is generally composed of one stamping machine. Stamping lines can be divided into stamping lines of different tonnages according to the different production processes of metal stamping parts. Generally speaking, each production line must produce different metal stamping parts according to the tonnage of the punching machines, and these metal stamping parts must be suitable for this type of production on the production line. Due to the fact that each stamping production line needs to produce several different types of processes, and the required punch tonnage for each process is also different, each production line needs to be equipped with punches of different tonnages. For example, the first deep drawing process of metal stamping parts requires relatively large tonnage punches, while processes such as flanging and punching require relatively small tonnage punches. Therefore, in general, a production line will have two larger tonnage punches used for drawing and other work, while other processes require several smaller tonnage punches. This can not only meet the process requirements of production and processing, but also utilize equipment resources and reduce unnecessary waste.

2、 The process of metal stamping parts is complex

Except for some purchased semi-finished products, all kinds of metal stamping parts required by the car body workshop are produced by the stamping workshop. The production of each metal stamping part generally requires a processing process. The main production processes include unwinding and cutting, stretching, shaping, edge cutting, punching, and flanging. Among them, uncoiling and cutting is to place the sheet metal on the cutting machine before stamping production, and process it into a geometric shape suitable for stamping production. Different stamping parts require different production processes, and different production processes require the replacement of different molds for processing. Due to the fixed production process route for each metal stamping part, the process route for producing metal stamping parts is complex, leading to difficulties in production scheduling.

IIISimultaneously conducted at both endsproduction line

According to the production process requirements of the stamping line, when arranging punches of different tonnages for each process, they are generally arranged in the order of high, medium, and low tonnages from both ends to the middle. In this way, bidirectional production can greatly improve the production efficiency of the stamping workshop and the utilization rate of the punching machine, thereby reducing the waste of production costs.

4、 Batch rotation production

When the stamping workshop produces metal stamping parts, it not only produces one product at a time, but also does not produce all the stamping parts planned for this cycle. Instead, it considers production change time, cutting frequency, and production economics. On this basis, batch production is adopted sequentially. Batch rotation production refers to dividing the metal stamping parts arranged within the production plan cycle into several batches according to the needs of the car body workshop. Each batch can be produced once a day, and the final quantity will be completed within the planned cycle. The advantage of mass production is that it will not make the production time of a single batch of metal stamping parts too long, which will affect the production of other metal stamping parts and lead to downstream workshop use, thus reducing production costs.

5、 Limitations on changes in production batches

The production plan of the stamping workshop is determined by the body workshop to determine the types and quantities of stamping parts required, as well as the inventory of stamping parts in the stamping workshop. However, in the production process of metal stamping parts, there will be many uncertain factors, such as raw material shortages, changes in demand in the body workshop, punching machines, mold failures, etc., which will lead to changes in production. However, considering that a small production batch will increase the number of mold changes, while a large production batch will lead to the accumulation of finished product inventory and increase production costs, a more reasonable range of changes should be determined based on the production batch.