Quality control and inspection is the key link to ensure product quality in the production process of main and auxiliary connecting rod forging. This paper will introduce the quality control points and inspection methods in the production process of the main and auxiliary connecting rod forging in detail to ensure the performance and reliability of the product.
Quality control points
Material quality control: The selection of high-quality materials is the basis for the production of high-quality main and auxiliary connecting rod forgings. The quality of raw materials is checked to ensure that their chemical composition, mechanical properties and metallographic structure meet the requirements of the standard. At the same time, the storage and transportation process of raw materials is strictly managed to prevent material damage or pollution.
Heating process control: The heating process has an important effect on the mechanical properties and metallographic structure of the main and auxiliary connecting rod forgings. The heating temperature, heating time and heating uniformity should be controlled to prevent overburning, oxidation and decarbonization. The appropriate heating process is used to ensure that the material has good plasticity and microstructure transformation.
Forging process control: In the forging process, parameters such as mold, forging force and forging temperature should be strictly controlled to ensure the dimensional accuracy and internal quality of the forging. Pay attention to control the amount of deformation to prevent excessive fatigue or fracture of the material. At the same time, reasonable arrangement of forging process to improve production efficiency and product quality.
Cooling and heat treatment: According to the material and process requirements of the main and auxiliary connecting rod forging, choose the appropriate cooling method and heat treatment process. Control the cooling rate to obtain the desired organization and performance. In the heat treatment process, it is necessary to ensure the accuracy of temperature, time and other parameters to prevent defects such as uneven hardness and cracks.
Process monitoring and recording: real-time monitoring of the production process, recording key process parameters and equipment operating status. Identify and solve potential quality problems through data analysis. At the same time, establish a sound quality management system to ensure the effective implementation of quality control measures.
Inspection method
Appearance inspection: The appearance inspection of the main and auxiliary connecting rod forging is carried out to confirm that there are no obvious cracks, pores, slag inclusion and other defects on the surface. Check whether the dimensions are in accordance with the requirements of the drawing and ensure that the proportions of each part are coordinated.
Hardness test: The hardness tester is used to test the hardness of the main and auxiliary connecting rod forgings to ensure that the hardness value meets the standard requirements. For products with special performance requirements, corresponding mechanical properties tests should be carried out, such as tensile, impact, fatigue, etc.
Metallographic inspection: Observe the metallographic structure of the main and auxiliary connecting rod forgings through a metallographic microscope to check whether the structure is uniform and whether the grain size is appropriate. The abnormal tissue is analyzed in depth to find out the cause and take corresponding measures.
Non-destructive testing: using ultrasonic testing, magnetic particle testing and other methods to non-destructive testing of the main and auxiliary connecting rod forging, in order to find the internal cracks, pores and other defects. Non-destructive testing should be carried out in important parts of the product and areas prone to problems.
Size and form tolerance inspection: Use measuring tools to measure the size of the main and auxiliary connecting rod forging to check whether it meets the requirements of the drawing. At the same time, the tolerance of form and position is checked to ensure that the position of each part is accurate and the movement is flexible.
Comprehensive performance test: According to the application requirements of the product, the comprehensive performance test of the main and auxiliary connecting rod forgings, such as simulated engine conditions for durability test. Through comprehensive performance testing, the reliability and durability of forgings in actual use are evaluated.
Through the quality control and inspection of the forging process of the main and auxiliary connecting rod, the quality stability and reliability of products can be effectively improved. At the same time, through continuous improvement and optimization of production processes, production efficiency can be improved and costs reduced. Therefore, enterprises should pay attention to quality control and inspection work, and constantly improve the quality management system and technical level to meet the needs of customers for high-quality products.
