Rollers are produced in batches, and there are many key process control procedures, so no one can visually detect whether this product is good or bad. We need to look at the production process and focus on a few points:
1. Material
If you have experience in manufacturing, pay attention to the material grade, which steel mill can manage the steel, and check whether the steel inspection report meets the requirements. This requirement is divided into two types: one is the national standard (the most common), and the other is the manufacturer’s internal control standard. The heat treatment of the product is stable, and the range of the chemical composition of the steel is narrowed, which is easy to control.
2. Welding process
If you have manufacturing experience, look at the process and see if the parameters of the equipment are consistent with the process. If they do not match, it means that the quality control ability is poor. See if there are any control requirements for the parameters, how to ensure it, and if it is actually achieved, see the profile. Cut into pieces.
3. Heat treatment process
If you have manufacturing experience, you need to see whether it is overall heating surface quenching or intermediate frequency quenching. Observe the consistency of process parameter settings with the process, as well as the frequency of self-inspection items, whether they are implemented, and whether there is a spot check record for quenching liquid, heating temperature, and flow rate. Whether there is an inspection record, see the cutting block and so on.
4.machining, assembly process
Have manufacturing experience: watch the quality control process on site, whether there is a quality control blind spot, as well as the implementation and abnormal handling process and implementation, and some inspection methods, whether there are enough supporting detection methods and instruments.
Post time: Mar-22-2022
