How to ensure the quality control in the process of automobile stamping die processing?

To ensure the quality control of automobile stamping die processing, we need to start from many aspects, including the selection of raw materials, the maintenance of processing equipment, the formulation of processing technology, the improvement of personnel skills and quality inspection. The following are specific measures:

Quality control of raw materials

Strict material selection: according to the use requirements and performance characteristics of automobile stamping die, choose the appropriate die steel material. For example, high-performance die steel such as Cr12MoV can be selected for the die bearing large impact load to ensure that the material has good strength, toughness and wear resistance. At the same time, it is necessary to check whether the hardness and microstructure of the material meet the requirements.

Material inspection: Strictly inspect the purchased raw materials, including chemical composition analysis, hardness testing, flaw detection, etc., to prevent unqualified materials from entering the processing link. For example, the chemical composition of the material is accurately analyzed by spectral analyzer to ensure that the content of each element meets the standard requirements.

Maintenance and management of processing equipment

Regular maintenance: make a detailed equipment maintenance plan, and regularly maintain and overhaul the processing equipment to ensure that the equipment is in good running condition. For example, for the CNC machining center, it is necessary to change the lubricating oil regularly, clean the guide rail and lead screw and other parts to prevent wear and precision decline.

Accuracy detection and calibration: regularly detect and calibrate the accuracy of processing equipment, such as regularly check the accuracy of three-coordinate measuring instrument to ensure that the positioning accuracy and repeated positioning accuracy of the equipment meet the processing requirements. Once the deviation of equipment accuracy is found, it should be adjusted and repaired in time.

Optimization and implementation of processing technology

Process formulation: according to the structural characteristics, precision requirements and production batch of the mold, a reasonable processing process plan is formulated. For example, for complex automobile panel dies, rough machining, semi-finish machining and finish machining are carried out step by step to ensure the machining efficiency and the precision and surface quality of the dies.

Process verification: Before formal processing, verify the process plan by trial processing or simulation of machining, and find and solve the problems in the process in time. For example, the NC programming software is used to simulate the machining path and check whether there are problems such as tool interference and unreasonable cutting parameters.

Strictly implement the process: In the process of processing, the operator should operate in strict accordance with the established process regulations, and shall not change the process parameters at will. For example, according to the specified cutting speed, feed rate and cutting depth, milling is carried out to ensure the stable processing quality of the die.

Personnel skill training and management

Skills training: organize operators to participate in professional skills training regularly to improve their operation level and quality awareness. The training contents include the operation skills of processing equipment, the understanding and implementation of process documents, and quality control methods. For example, training in numerical control programming enables operators to skillfully write efficient and accurate machining programs.

Qualification certification: the operators are certified, and only those who have passed the examination and obtained corresponding qualifications can take up their posts to operate key equipment or engage in the processing of key processes. For example, the EDM operators are specially assessed to ensure that they have the ability to operate equipment skillfully and ensure the machining quality.

Quality detection and feedback

Process inspection: In the process of machining, strengthen the quality inspection of molds, and adopt the methods of first article inspection, patrol inspection and completion inspection to find out the quality problems in the process of machining in time. For example, after the processing of each working procedure is completed, the operator first conducts self-inspection, and then the inspector conducts special inspection, and can enter the next working procedure only after passing the inspection.

Detection means: advanced detection equipment and means, such as three-coordinate measuring instrument, optical projector, roughness measuring instrument, are used to accurately measure the dimensional accuracy, shape and position tolerance, surface roughness and other indicators of the mold. For example, the key dimensions of the mold are measured by using a three-coordinate measuring instrument, and the measurement results are compared with the design dimensions, and the error is controlled within the specified range.

Quality feedback and improvement: establish a quality feedback mechanism, analyze and summarize the quality problems found in testing in time, and formulate corresponding improvement measures to prevent similar problems from happening again. For example, by holding a quality analysis meeting, technicians, operators and inspectors are organized to jointly analyze the causes of quality problems, formulate improvement plans, and track the improvement effects.