典型应用 03 · 设计院 → 工厂 · 12 步Case 03 · design office → factory · 12 steps
以工业直驱平缝机为对象（JUKI DDL-9000C 一类）：电机直接装在主轴上。先算针杆机构在 5000 rpm 下的惯性力矩，分清“峰值”和“一转做功”，选出电机；再校核上轴的强度、疲劳和固有频率，用 OpenFOAM 算控制箱散热器，编好数控程序，选出的 400 W 与实机一致。Take an industrial direct-drive lockstitch machine (JUKI DDL-9000C class), with the motor right on the main shaft. Compute the needle-bar mechanism’s inertia torque at 5,000 rpm, separate “peak” from “work per revolution”, pick the motor, check the upper shaft for strength, fatigue and resonance, size the control-box heat sink with OpenFOAM and write the CNC programs. The 400 W pick matches the real machine.
点任意一步，看这一步做了什么、得出什么数、产出了什么。绿色是通过，黄色是“待确认”：零件库缺数据，平台如实停下，没有估值。Click any step to see what was done, what numbers came out and what was produced. Green passed; amber is “to be confirmed”: the library lacked data, so the platform stopped instead of guessing.
↓ 发布为方案 Released as LOCKSTITCH-DD 第 1 版，带自制件 LS-101、LS-HS；校验结论“通过”随方案发出LOCKSTITCH-DD rev 1, with made parts LS-101 and LS-HS; the selection verdict “pass” travels with it
演练里卡住的地方都照实记下。每一条都是学生在课上可以接着做的题目。Everything that stalled in the run is recorded as it is. Each item is a problem students can pick up in class.
缝制阻力和摩擦零件库与样本都没有。400 W 是不含它们的下限，结论待确认。Neither the library nor the brochure gives sewing resistance or friction. The 400 W pick is a lower bound without them.
SGM7J-08A 扭矩、转速都够，但库里最大的驱动器 SGD7S-2R8A 带不动，需要企业补更大驱动器的数据。SGM7J-08A has the torque and speed, but the largest drive in the library cannot run it; a larger drive’s data must be added.
散热器能散 23 W，但驱动器损耗零件库没有数据，够不够待确认。The heat sink rejects 23 W, but drive losses are not in the library, so adequacy is unconfirmed.
针杆质量是示意值；起停加速时间 0.05 / 0.1 / 0.2 s 是设计假设；δ = 0.05 只为说明手轮大小，不是标准值；供电按三相 200 V。Needle-bar mass is illustrative; start-stop times of 0.05/0.1/0.2 s are design assumptions; δ = 0.05 only illustrates handwheel size and is not a standard; supply is 3-phase 200 V.
数据不够就停下来，说清缺什么，不估一个数凑结论。真实的工程就是这样做的。When data run out, stop and say what is missing; never guess a number to reach a verdict. That is how real engineering works.
每一步背后都是一门课里的一章。Every step is a chapter in one of our courses.
学校或企业预约演示工厂：Schools and companies, book a factory demo: info@wenquestrobotics.com
本案例的成果文件：Files produced in this case: LS-101.step、LS-HS.step、O1001.nc、O1002.nc