The Quality Assurance Of Metal Forging

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THE QUALITY ASSURANCE OF METAL FORGING

FQC Inspection In Pintejin Forging Factory

FQC refers to the quality status of the product (itself) after the product has completed all processes or procedures, including: appearance inspection (color, gloss, roughness, burrs, scratches), size/pore size measurement, performance test ( Physical/chemical properties, electrical properties, mechanical properties, operational control of materials), conduct a comprehensive and final inspection and testing, the purpose is to ensure that the product meets the shipping specifications and even meets the customer’s use requirements.FQC inspection is divided into the following processes

Incoming Size Inspection

Dimentional inspection is the most important job for custom forgings. Any dimension and tolerance error may cause the product unusable. To guarantee the final assembly, the dimensions and tolerances of steel forgings should be as accurate as possible. So our quality inspector will be in charge of dimentional inspection after products are finished.Generally, measuring tools such as calipers, micrometers, tape measures, rulers, dial indicators, plug gauges, and platforms are used to verify strictly in accordance with the drawing dimensions.For more accurate dimensions, CMM can be used. But only few companies have this instrument for the high price.

Incoming Tensile Inspection

Incoming Tensile Inspection is a destructive test process that provides ultimate tensile strength, yield strength, elongation and reduction area rate of the products.The incoming tensile inspection is divided into two types: static tensile inspection and dynamic tensile test. Place the object to be measured horizontally, and apply a precision spring scale to repeatedly pull it 25 times. The sealing displacement is less than 2mm to be qualified.

Incoming Hardness Inspection

The so-called hardness is the ability of a material to resist the pressure of a harder object into its surface. According to the different test methods and application ranges, the hardness units can be divided into Brinell hardness, Vickers hardness, Rockwell hardness, Micro Vickers hardness, etc. Different units have different test methods, which are suitable for materials with different characteristics or occasion.The testers of Pintejin Group can skillfully use Brinell hardness tester, Vickers hardness tester, microhardness tester and other equipment to verify whether the hardness of parts is qualified.

The Method/Step Of Incoming Hardness Inspection

In addition to non-sheet and non-finished parts, Brinell hardness tester can be used to measure, the indentation after measurement is obvious, suitable for large parts, generally less than 450HB is more accurate.
For parts larger than 450HB and thin slices, a Vickers hardness machine can be used, and the indentation of the parts after testing is small, which does not affect the use of the parts.
For the measurement of some tiny thin parts and coatings, Vickers hardness can be used. The indentation left behind is difficult to discern with the naked eye.

IPQC Inspection In Pintejin Forging Factory

IPQC is the process of effectively controlling product quality in the production process of Pintejin Forgings. Its main contents include~

First sample inspection;
Self-inspection, mutual inspection and inspection;
The formulation of limit samples;
Handling of unqualified products;
Formulation and update of inspection plan;
Deal with the quality problems of the production line in time;
Quality control of rework production process;
Applicability of work instructions and online tracking;

Regardless of the stage of inspection, resources, costs and acceptable levels need to be comprehensively considered. This requires us to formulate inspection methods according to certain rules.

Surface Defects Inspection In Pintejin Forging Factory

Salt Spray Inspection Of Anodized Forgings

Salt spray inspection is an environmental test that mainly uses artificial simulated salt spray environmental conditions created by salt spray test equipment to evaluate the corrosion resistance of products or metal materials. Pintejin provides professional forging salt spray inspection.

OQC Inspection In Pintejin Forging Factory

The finished product must be inspected before leaving the factory, in order to achieve the goal of zero defect customer satisfaction and zero complaints. The inspection items include: Finished product packaging inspection: whether the packaging is firm and whether it meets the transportation requirements. Finished product identification inspection: such as whether the trademark batch number is correct. Appearance inspection of finished products: whether the appearance is damaged, cracked, scratched, etc. Finished product functional performance inspection. If the batch is qualified, it will be released. If it is not qualified, it should be reworked or repaired in time until the inspection is qualified.