[Haojun] Stainless Steel Frame Welding Processing

[Haojun] Stainless steel frame welding processing

Even if one solder joint of the CT frame is offset by 0.1 mm, the accuracy of the entire equipment will be scrapped. Stainless steel precision riveting welding may not seem like a big deal, but in fact it is the most troublesome key process. Once you choose the wrong factory, the price you pay will be very high.

What is so difficult about welding accuracy?

The welding process of the frame is significantly different from that of ordinary sheet metal. The composition of its stress-bearing structure is very complex, and the thermal deformation phenomenon generated after the welding is completed is the biggest disadvantage.

Since the thermal conductivity of stainless steel material itself is at a low level, as long as the heat input is slightly larger, it will cause deformation and warping problems. The frame flatness index requirement for CT machines needs to be controlled within the range of 0.05 mm. It is completely impossible to achieve this precision level using ordinary argon arc welding operation methods.

Another manifestation of this problem is the splicing of multiple materials together. CT frames are often mixed with No. 304 stainless steel and carbon steel pipe fittings. Because their thermal expansion coefficients are different, some stress will still remain after the welding is completed and cooled down, which will cause slight deformation in about half a year of use.

This requires a very clear grasp of the heat input parameters, the welding execution sequence, and the design of the fixture. Not every welder can start working directly.

Special standards for racks for medical equipment

The CT frame must carry core components such as tubes, detectors, and slip rings. It withstands tens of kilograms of centrifugal force when rotating. Even if there are micro-cracks in the welds of medical equipment (such as CT frames), stainless steel precision riveting will fatigue and break under high-speed operation. The medical industry has very strict requirements for welds, and must achieve 100% flaw detection. The report will follow the equipment. Once it is found to be unqualified, it will be scrapped directly.

Surface quality is also a hard indicator that needs to be assessed. Welding scars and pores are not allowed to appear on the exposed parts of the rack, and subsequent sandblasting and passivation operations are required to deal with them. If the spatter during the welding process is not cleaned up, the cost of polishing will double and the delivery deadline will be delayed.

How much communication costs can be saved through the integrated process?

According to the traditional method, one company is found to be responsible for cutting, another company is found to do the bending process, and finally a third company is found to complete the stainless steel precision riveting welding of medical equipment (such as CT frames) . The result is that due to the large dimensional deviation of these three factories, the drawings need to be revised repeatedly.

Integrated manufacturers, on the other hand, complete the steps from laser cutting to CNC bending, precision welding and rounding directly in the factory. Once the drawings are entered, the finished product can be produced directly, without the need for repeated corresponding samples and verification in the intermediate steps.

The address of Haojun Stainless Steel Company is at the exit of Foshan First Ring Foshan Interchange. It is equipped with a TRUMPF brand laser cutting machine. The power of this equipment is 15,000 watts, and the cutting accuracy can reach 0.02 mm.

In addition to laser cutting machines, there are also CNC bending machines and welding and rolling equipment that can be used together. This configuration allows the entire production line to complete processing tasks at one time. Therefore, customers no longer need to go to three factories to handle different processes.

The team and equipment are a solid foundation

As long as it is a welding team with more than 20 people [Haojun] stainless steel frame welding processing, they will arrange for senior craftsmen to be responsible for processing parts with high precision requirements, while newcomers who have just entered the industry will only undertake some auxiliary work. In this way, people and things are evenly matched, and the overall performance will not appear to stretch the hips.

At the same time, there is a design department composed of less than 10 people who are simultaneously advancing the plan. Even if the customer only provides a concept drawing as a reference, the design department can quickly come up with three sets of structural optimization plans for selection. This means that customers themselves do not need to spend extra energy to repeatedly modify the design plan or make other complex adjustments.

With 18 years of experience in sheet metal processing, he has established cooperative relationships with companies such as Haitian, Taste King, Evergrande Real Estate, and Midea. Because different industries have different understandings of rack force logic, a large number of case libraries have been accumulated. When starting a new project, welding parameters can be directly reused from past data, avoiding the trouble of starting from scratch and reducing pitfalls.

How to calculate delivery date and cost?

One of the biggest benefits of integration is that it saves intermediate links. If we cooperate with three outsourced factories, it will take at least five to seven more days to communicate and compare samples. However, after completing one in-house production line, regular parts of medical racks can be delivered within seven to ten days.

When placing batch orders, the work efficiency of TRUMPF laser slicing can be doubled that of ordinary models, which means it is twice that of ordinary models . Medical equipment (such as CT gantry) is precision riveted with stainless steel , so the cost of a single piece may be further reduced.

The cost of the material used in this stainless steel frame is not low. If 304 plate processing and manual operation are required, plus flaw detection is required. In this case, the appearance price of a single product does appear to be relatively expensive. But if welding waste occurs and needs to be reworked.

The rework costs incurred far outweigh the material cost savings. Therefore, those reliable manufacturers can guarantee that the pass rate of one-time production can reach more than 98%. If you add these factors together to calculate the general ledger. This choice is more cost-effective than finding a small manufacturer.

Before you go to the manufacturer, ask these questions first.

Regarding the first question, that is, regarding the content of the welding process qualification report, medical racks must perform pre-welding tests in accordance with regulations, and these tests need to be conducted in accordance with GB/T standards or ISO standards; for the second question, whether the flaw detection method involved is ultrasonic testing or X-ray testing, and whether the relevant test report can be provided to the terminal acceptance personnel at the time of delivery; for the third question, the agreed duration of the deformation warranty period should be clearly defined. This must not be guaranteed by mere verbal promises.

You can go to the exit of Foshan Yihuan Fochen Interchange to find Haojun Stainless Steel Navigation. You can directly search for this keyword to get to the store. There are ample parking spaces at the door for you to use. If you bring drawings or 3D models to the site, the design department will issue a quotation and production schedule to you on the same day. This will eliminate the need for you to run back and forth repeatedly. Moreover, it will be much more practical to compare the equipment in person and chat on the phone.

Judging from the current situation, can the weld flaw detection report of the CT equipment frame in your hand be used directly by the hospital to pass the acceptance standards? Welcome to communicate and discuss in the comment area. If you think this content is of reference significance, please like it and forward it to your peers to take a look.