The yield is a comprehensive technical and economic indicator in the production of plate. Increasing the yield can not only reduce the loss of metal, but also the economic benefits of the enterprise. The factors affecting the yield of medium and heavy plates are various, mainly the variety structure, negative deviation rolling level, plate type control level, cutting loss, rolling waste and burning. The measures to increase the yield are:
1. Strengthen the blank design
According to the actual production on site, the optimization calculation method determines the blank design to achieve less waste. The selection of reasonable slab design specifications is the first choice with the largest single weight, the highest output and the best yield.
2, balanced tapping
Control the operability of the tapping, stipulate the hourly tapping amount, and the tapping rhythm is consistent to improve the heating furnace capacity, so that the steel plate temperature is uniform and the burning loss is reduced.
3, fixed width rolling
During the rolling process, the range of the hair width is strictly controlled to avoid the large amount of trimming and affect the yield.
4, reduce burning loss
Timely measure, clean and inspect the billet to prevent the steel sheet from being short due to insufficient raw materials or crusting, strictly control the furnace atmosphere, prevent overheating and overburning, sticking to the furnace, etc., ensure the uniformity of the steel temperature, and adjust the heating in time. Temperature to avoid decarburization.
5, reduce the loss
Control the shape of the file, improve the overall plate shape, select the corresponding roll up and down, and increase the previous upper and lower roll speed ratio from ±5% to ±10%, so that the steel plate squat phenomenon is improved.
6, using negative deviation rolling
At present, the steel plate delivery is mostly theoretical weight delivery. The use of negative deviation rolling will increase the finished product rate. When the negative deviation is rolled, the dimensional accuracy is the key. The operator has to do the diligent inspection, the diligence and the diligent adjustment, and find the problem. Correct in time to avoid batch failure.
7. Improve the control and rolling control process
For the flaw detection board and the high-performance type steel, the large reduction mode is adopted to reduce the unqualified performance of the steel sheet. In addition, good control of rolling and cooling technology can reduce the production of iron oxide scale and increase the yield.
The production process of a machine is the whole process of making a product from a raw material (or semi-finished product). For machine production, it includes the transportation and preservation of raw materials, preparation for production, the manufacture of blank, the processing and heat treatment of parts, the assembly and debugging of products, paint and packaging. The content of production process is very extensive. Modern enterprises use the principles and methods of systems engineering to organize production and guide production, and regard the production process as a production system with input and output.
The technological process
The technological process
In the production process, the process of changing the shape, size, position and nature of the production object, so that it becomes a finished product or semi-finished product is called the technological process. It is an essential part of the production process. Process: casting, forging, stamping, welding, machining, assembly processes, such as machinery manufacturing process generally refers to the part machining process and machine of the sum of the assembly process, other process is known as the auxiliary process, such as transportation, storage, power supply, equipment maintenance, etc. The technological process is composed of one or several sequential processes, and a process is composed of several working steps.
Working procedure is the basic unit of mechanical processing process. The so-called process refers to a (or a group of) workers, in a machine tool (or a working place), on the same workpiece (or at the same time to several workpiece) of the continuous completion of that part of the process. The main characteristic of a process is that it does not change the processing object, equipment and operator, and the content of the process is continuously completed.
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