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E-mail
huogang010@163.com
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Phone
13911564578
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Address
Jisheng Villa 19-11, Changping District, Beijing
Beijing Zhongxian Hengye Instrument Co., Ltd
huogang010@163.com
13911564578
Jisheng Villa 19-11, Changping District, Beijing


Common causes of product defects
The actual situation of industrial environment is different from the theory in CAD models. During the production of components, many unforeseeable phenomena may occur. Due to the complexity of metal melting,From mold to componentThe production process of finished products is not a linear and repeatable process. The rebound during stamping molds, shrinkage during the production of molds made of composite materials, or the heat generated when welding two components together are all unpredictable phenomena that may affect the accuracy of molds. These phenomena are difficult to control, so the final result cannot be predicted until the components are obtained.
Firstly, the mold is constructed based on a theoretical model, which is developed to produce components that meet technical requirements. However, in actual industrial production, the above phenomenon can interfere with cast or stamped components. This has resulted in components that do not meet technical requirements and must be adjusted, corrected, and changed in order to pass quality control inspections.
We can categorize defects into four main types:
Production defects (parts not meeting requirements)
Assembly defect (incorrect assembly of components)
Defects related to raw materials (e.g. incorrect steel type causing some rebound, poor surface roughness, etc.)
Defects caused by normal wear and tear of components or parts (such as mold cracking)
There are several causes for each type of defect. Human error is undoubtedly the most common.


The ideal method for detecting product defects
When unpredictable phenomena change the finished components, the iterative process of quality control begins. bettermethodIt is to process the components before adjusting the mold. More precisely, this method involves producing a component, using quality control equipment, andDetection softwareMeasure it and analyze the deviation between the component and the CAD model. Therefore, if we notice a lack (or excess) of a few centimeters in a certain area, we can make adjustments in the molddiePolish or add materials to the corresponding surface on the fixture. Therefore, the iteration of the mold is carried out after measuring the finished components.
Once this operation is completed, we will restart the production process, produce a new component, and then measure the component again to verify if there are any deviations. This iterative process will continue until the desired component is obtained (i.e., when the produced component is consistent with its CAD model).


The ideal solution for producing parts with fewer defects
This repetitive quality control process requires fast measuring equipment to provide complete dimensional information in a timely manner and produce the next component without delay. The measuring tool must also be portable for direct measurement of workpieces in the workshop. In this way, the workpiece does not need to be sent againcoordinate measuring machineBy using CMM, valuable time is saved and more inspections can be conducted. Measuring instruments should also be easy to use, with their digital "qualified/unqualified" function allowing operators to quickly evaluate dimensional measurement results and easily identify workpieces that do not meet tolerance requirements. Finally, it should be able to measure various types of dimensions, finishes, and geometric shapes without the need for surface preparation work.
3D scanning technologyThe product is fast, portable, and versatile, meeting these requirements and enabling production and quality teams to inspect components and detect defects, especially Class I and Class II defects. In fact, 3D scanners help reduce the impact of human factors in the manufacturing process by reducing visual inspection or the use of manual tools. They can also measure the wear of components and help understand when to replace fixtures or molds.


Advantages of 3D scanning: improving workpiece quality by optimizing detection time
More efficient detection
When quality control personnel discover production defects (i.e. parts that do not meet technical requirements), the company will launch an investigation and fall into a high-pressure and anxious situation. But with the 3D scanning technology product, the quality team can now quickly obtain a large amount of data and conduct investigations directly in the workshop to identify the root cause and avoid further delays.
Detect more components and features
Due to the faster speed and more data obtained by 3D scanning technology products compared to coordinate measuring machines, they can measure more workpieces or detect more features, and provide more detailed information. In this way, managers can make better decisions and optimize production processes. In addition, by directly measuring workpieces in the production workshop without sending them to the metrology laboratory, the quality team saves time and can test more workpieces.
Optimizing the iterative process through reverse engineering
Once certified molds produce finished products that meet technical requirements, the molds, dies, or fixtures can be scanned for processingreverse engineeringTherefore, if the mold wears out and needs to be replaced with a new one, we will not use the nominal model in the next production process. Instead, we can directly use digital models to manufacture components that meet inspection standards. This optimizes the initial iteration process for future production.


It is inevitable that there will be product defects