Is it difficult to meet the standards for precision sheet metal parts? Equipment and crafts control is the core
For precision sheet metal parts, even a slight error of 0.02 mm is enough to cause the entire medical equipment to become stuck because it cannot be installed. When processing customized orders, the biggest headache faced by Party A's customer base is: what method to take to finally confirm that the supplier on the other side is indeed capable of controlling the extremely small errors calculated in microns.
Equipment configuration is the basis for accuracy
Starting in 2024, those leading precision sheet metal processing companies will already use five-axis linkage CNC equipment and laser cutting machines with an accuracy of 0.01 mm as standard configurations. Moreover, Han's brand and companies such as Huagong Technology have already achieved mass production and completed delivery. As for ordinary old equipment with only two axes, it is impossible for them to achieve a tolerance standard of ±0.05 mm.
Equipment selection directly determines the upper limit of processing. The requirement for flatness of medical CT gantry parts is less than or equal to 0.03 mm. To meet this high standard, a highly rigid gantry structure must be used and must be equipped with an online probe. In 2025, Suzhou and Dongguan already have more than 30 factories, and they have all completed the upgrade of such equipment.
Full process process control to prevent errors
This process starts with design blanking, then welding, and then surface treatment. There are five processes in total, and these five processes are interconnected. According to data from an industry survey in 2025, 72% of precision parts scrapping occurs in the two stages of welding and surface treatment, rather than in the cutting process.
A reliable approach is to set up statistical process control, that is, SPC control, in every production process, and implement first-piece inspection and third-level inspection at key nodes. There is a Shenzhen-based manufacturer engaged in the electronic communications business. After introducing this system in 2020, the batch qualification rate of its products increased from 89% to 99.2%.
Material selection determines performance upper limit
If you choose the wrong material grade such as aviation aluminum 6061-T6, medical 316L stainless steel or lead-free copper alloy, no matter how precise your processing accuracy is, it will be in vain. We must know that by 2025, the annual demand for low-nickel non-magnetic materials in the medical field will grow by more than 15%.
Suppliers must provide material sheets for each batch. Is it difficult to meet the standards for precision sheet metal parts? Equipment and craftsmanship control is the core, as well as spectral reports, and component re-inspection before the goods are put into storage. There is an orthopedic equipment company in Shanghai. In 2024, the entire container of 316L plates was returned due to a batch of nickel exceeding the standard.
Quality inspection system is the last line of defense
When carrying out factory inspection of precision parts, three-dimensional coordinate measuring machines, roughness meters and salt spray test chambers are standard equipment that must be equipped. By 2025, when under the requirements of the ISO 13485 quality management system, work on medical sheet metal products will require an additional step of biocompatibility sampling inspection.
The relevant records of the inspection must be able to trace the source and find the root. The serial number must be able to correspond to the equipment, operator and batch information of the material. The leading manufacturer has used the MES system to leave traces of the entire process for archiving. In 2024, the one-time pass rate of external audits was less than 60%.
Flexible customized service to meet needs
Small batch orders require a minimum order quantity of fifty pieces, a delivery cycle of seven days, and the product structure is asymmetrical. This demand cannot be accommodated in the production plan on a traditional ordinary production line. By 2025, more than 20 factories in the Pearl River Delta region have opened flexible production lines, and at the same time, the time for mold change has been reduced to no more than four hours.
When doing customized work, you can never say that you just charge a little more for the mold making fee and it is done. The core point is that you must enter the design stage in advance and do DFM review. A manufacturer of automation equipment customized parts processing risk control and optimized the four-panel solution into two panels during 2024, which ultimately reduced the cost by 18%.
High standards are industry consensus
These five levels include equipment requirements, process requirements, materials must be qualified, quality control must be passed, and services must be in place. These requirements are not internal standards privately formulated by a certain factory, but have been written into relevant specifications for risk management and control of customized parts processing , becoming a hard threshold.
In 2025, specifications such as GJB and IEC 60601 have formally established such standards, and all relevant parties must strictly abide by them without room for negotiation.
Downstream parties are more inclined to include suppliers in their own quality audit systems and require unannounced unannounced inspections at least once a year. For those processing plants that cannot keep up with the pace and response speed, if they want to continue to exist in the field of precision manufacturing, they will face very difficult survival challenges in the next three years.
Of the pile of precision parts you have in hand, are they currently stuck on the equipment side, the process side, or are they stuck on the material side? Please go to the comment area to talk and chat. If you think this thing is useful, just click the like, and forward it to your colleagues who are doing procurement work in your company.
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