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syjx@shengyangringrollingmachine.com
2026-02-27
If you look for suppliers of D53 mills in China, you immediately come across a sea of offers. But here is the main nuance that many people miss: “automatic?” - This is often just a marketing wrapper. In fact, anything can be hidden under this sign - from truly advanced lines with CNC and robotic loading to ordinary machines with a couple of sensors that can only signal an error. I myself bought a “fully automatic” about five years ago. mill at one provincial plant - in the end they had to finish the control system almost from scratch, because their "automation" could not cope with our heat-resistant alloy blanks. So the first thing to start with is to understand what exactly automation means in each specific case.
Look here. Key to the D53 is the rolling of large diameter rings, often for power generation or heavy engineering applications. And when they say “automatic”, they usually mean three things: automatic feed of the workpiece, real-time geometry control and automatic unloading of the finished ring. But in China, the level of integration of these systems is very different. For some suppliers, this is really a single circuit: the robot takes the heated workpiece, places it on the mandrel, the mill rolls, the laser scanner measures the wall thickness and diameter, and if there is a deviation, the system immediately adjusts the roll pressure. And others have “automation?” ends with the hydraulic pusher feeding the workpiece, and the operator does the rest according to the patterns.
I once visited a factory in Jiangsu that boasted of its automatic lines. I arrive and the operator sits there and manually enters the parameters for each new batch. I ask: “Where is the automation?” They answer me: “But after entering the parameters, the mill itself works?”. This, of course, is not it. True automation for the D53 should minimize human error at all stages, especially when moving to different ring sizes. And this is very rare.
Therefore, my advice: first of all, ask not for beautiful brochures, but for a list of completed projects with specific models of mills and a description of what exactly their system did. The best thing is a video of the process from loading to unloading without editing. Many do not provide this, and this is already a red flag.
It is generally accepted that all production is concentrated around Shandong and Hebei. This is partly true - there really are giants there, like those that work for CNR or CSR (railway corporations). But their products are often "sharpened" for the domestic market and government orders, and the export option can be simplified. It is much more interesting, in my opinion, to look at less popular, but technologically advanced enterprises in the provinces of Jiangsu and Zhejiang. There is more flexibility and readiness to customize the camp to European or Russian safety and management standards.
For example, I am now looking at one manufacturer from Nanjing. They are not the first in the lists on Alibaba, but they have an interesting development - a system for compensating for the elastic deformation of rolls in real time. For larger rings this is critical to avoid tapering. They tested this system on orders for Korean shipbuilders. It’s details like these that reveal the real level, and not loud statements about “high technology”.
By the way, abouthigh-tech enterprises. Often in a company description it is just a cliche. But if you dig deep, high technology should be in the hardware. and software. For example, the use of Siemens or Beckhoff servomotors instead of conventional hydraulic drives, the in-house development of deformation control algorithms - these are indicators. Like the same oneShandong Shenyang Mechanical Equipment Co.,Ltd(their website ishttps://www.shengyangjxgroup.ru). I've been looking into their D53 proposal. They position themselves ashigh-tech enterprise, and in their case this is reinforced by the fact that they emphasize the synergy of the mechanical part and the CNC system, which they themselves adapt. This is an important point: when the body and “brains” made in the same ecosystem, there are fewer compatibility problems.
Let’s say that a supplier seems to have been found and the technical specifications match. The biggest mistake at this stage is saving on engineering and installation supervision. Chinese suppliers, with rare exceptions, send the mill disassembled - several tens of tons of metal in containers. Assembly and setup is a different story. If the contract does not specify the details of commissioning (how many specialists, for how long, who is responsible for training), you can end up with a pile of iron, which, at best, will lead to defects.
We had a precedent: we ordered a mill for rolling bearing rings. Two Chinese engineers arrived for two weeks. It turned out that to calibrate the pressure sensors we need a special stand, which we don’t have, and they didn’t bring it. Setup took a month while we waited for the equipment. All this time the workshop was idle. Now we always agree in advance on a complete list of test equipment required for commissioning.
Another stone is spare parts and service. Many factories use components from local Chinese brands in hydraulics, which may be incompatible or simply not available here. It is necessary to immediately discuss the possibility of replacing, say, a Chinese pump with a Rexroth, or at least have a complete set of the most consumable parts - seals, temperature sensors - for the first two years of operation.
Let's go back to the exampleShandong Shenyang Mechanical Equipment Co.,Ltd. I am familiar with their work firsthand - colleagues from Volgograd two years ago purchased from them a line based on D53 for the production of large-sized rings for wind energy. What did you note? Firstly, their engineers delved quite deeply into the technical requirements. They didn’t just sell a standard model, but offered a reinforced frame and a modification of the roll cooling system, since a long rolling cycle was expected.
Secondly, which is key for me, they provided remote access to the diagnostic system. These are not just nice words. When, after six months of work, minor glitches in the positioning system began, our video communication specialists, together with their engineers, looked at the logs and found a problem in the controller firmware. Firmware update It took a couple of hours, without stopping production for a week waiting for a specialist. This is a sign of a serious approach.
Of course, not everything was perfect. There were problems with the documentation - the translation into Russian was done by machine, and there were discrepancies in some diagrams. I had to check it using the original Chinese drawings. But this, alas, is a common disease of many suppliers.
Now the trend is not so much automation as “digitization?” the whole process. The point is that the parameters of each workpiece (chemical composition, temperature) and each pass of the rolls are recorded in a common database. Then, if the ring is damaged, you can track exactly at what stage and due to what deviation this happened. In China, only a few are starting to do this, mainly those who work closely with Western partners.
Another point is energy efficiency. Modernautomatic ring rolling millsmust not only make products, but also save money. Energy recovery when braking rolls, intelligent shutdown of auxiliary systems when idle - this is no longer science fiction. When choosing a supplier, it is worth asking if they have such options or if they plan to implement them. This shows whether the plant is thinking about development or is simply churning out proven but outdated models.
Bottom line, choosing a D53 supplier in China is not about finding the cheapest option. This is a search for a technology partner who understands your tasks and is able not only to sell a machine, but to ensure its integration into your production. You need to look at the details, at the readiness for dialogue, at real cases, and not at glossy catalogues. And then you can find a very worthy partner who will give much more for the same money than a well-promoted brand with a conveyor belt approach.
