{"id":20270,"date":"2025-12-17T09:19:18","date_gmt":"2025-12-17T09:19:18","guid":{"rendered":"https:\/\/imtekmotion.com\/?p=20270"},"modified":"2026-06-25T01:12:26","modified_gmt":"2026-06-25T01:12:26","slug":"%e4%bd%a0%e9%9c%80%e8%a6%81%e4%ba%86%e8%a7%a3%e7%9a%84%e7%ba%bf%e6%80%a7%e5%af%bc%e8%bd%a8%e8%ae%a1%e7%ae%97","status":"publish","type":"post","link":"https:\/\/imtekmotion.com\/zh\/linear-guide-calculation-you-need-know\/","title":{"rendered":"\u5982\u4f55\u8ba1\u7b97\u76f4\u7ebf\u5bfc\u8f68\u7684\u8f7d\u8377\u3001\u529b\u77e9\u548c\u5b89\u5168\u7cfb\u6570\uff1f"},"content":{"rendered":"

I have stood in many factories where a machine was vibrating so hard it was shaking the floor, all because the engineer guessed the load instead of calculating it. It is a painful and expensive mistake that I want to help you avoid. At IMTEK, I have seen that a few minutes of math during the design phase saves weeks of downtime later. Before calculating specific dynamic loads or moments, it is crucial to understand the foundational mechanics of these systems. If you need a refresher on how forces travel through the rail and block, I recommend reading our comprehensive engineer’s guide on \u76f4\u7ebf\u5bfc\u8f68\u5de5\u4f5c\u539f\u7406\u7684\u5de5\u7a0b\u6307\u5357<\/a>.<\/p>\n

\u8ba1\u7b97\u76f4\u7ebf\u5bfc\u8f68\u7684\u8f7d\u8377\u548c\u5b89\u5168\u7cfb\u6570\u65f6\uff0c\u9700\u8981\u6c47\u603b\u6240\u6709\u9759\u6001\u529b\u548c\u60ef\u6027\u529b\uff0c\u5c06\u4fef\u4ef0\u3001\u504f\u6446\u548c\u6eda\u8f6c\u529b\u77e9\u6362\u7b97\u4e3a\u7b49\u6548\u5f84\u5411\u8f7d\u8377\uff0c\u7136\u540e\u7528\u57fa\u672c\u9759\u989d\u5b9a\u8f7d\u8377C0<\/sub>\u9664\u4ee5\u6700\u5927\u4f5c\u7528\u8f7d\u8377 Pmax<\/i><\/sub><\/em>\u5bf9\u4e8e\u591a\u6570\u5de5\u4e1a\u5e94\u7528\uff0c\u5efa\u8bae\u5b89\u5168\u7cfb\u6570\u63a7\u5236\u5728 3.0\u20135.0\u3002<\/p>\n

\u5982\u679c\u4f60\u5e0c\u671b\u8bbe\u5907\u80fd\u591f\u957f\u671f\u5e73\u7a33\u8fd0\u884c\uff0c\u5c31\u9700\u8981\u6309\u7167\u6e05\u6670\u7684\u8ba1\u7b97\u6d41\u7a0b\u8fdb\u884c\u9009\u578b\u3002\u4e0b\u9762\u6211\u4eec\u5c06\u4ece\u53d7\u529b\u3001\u529b\u77e9\u3001\u5b89\u5168\u7cfb\u6570\u548c\u5bff\u547d\u8ba1\u7b97\u51e0\u4e2a\u65b9\u9762\u5c55\u5f00\u8bf4\u660e\u3002<\/p>\n

\n

1. \u7406\u89e3\u53d7\u529b\uff1a <\/b><\/strong>\u5230\u5e95\u662f\u4ec0\u4e48\u5728\u4f5c\u7528\u4e8e\u76f4\u7ebf\u5bfc\u8f68\uff1f<\/b><\/strong><\/h2>\n

\u6211\u7ecf\u5e38\u9047\u5230\u53ea\u5173\u6ce8\u5de5\u4ef6\u91cd\u91cf\u7684\u5ba2\u6237\u3002\u4f46\u5728\u9ad8\u901f\u81ea\u52a8\u5316\u8bbe\u5907\u4e2d\uff0c\u91cd\u91cf\u53ea\u662f\u95ee\u9898\u7684\u4e00\u90e8\u5206\u3002\u5982\u679c\u8bbe\u5907\u8fd0\u52a8\u901f\u5ea6\u5f88\u5feb\uff0c\u542f\u52a8\u548c\u505c\u6b62\u65f6\u4ea7\u751f\u7684\u60ef\u6027\u529b\uff0c\u5f80\u5f80\u4f1a\u6bd4\u5de5\u4ef6\u81ea\u8eab\u91cd\u91cf\u66f4\u5173\u952e\u3002\u4e00\u4e2a 10 kg \u7684\u8d1f\u8f7d\uff0c\u5728\u9ad8\u901f\u6025\u505c\u65f6\u53ef\u80fd\u4f1a\u8868\u73b0\u5f97\u50cf 100 kg \u7684\u8d1f\u8f7d\u4e00\u6837\u3002<\/p>\n

\u4f5c\u7528\u5728\u76f4\u7ebf\u5bfc\u8f68\u4e0a\u7684\u4e3b\u8981\u8f7d\u8377\u5305\u62ec\u9759\u8f7d\u8377\uff0c\u4e5f\u5c31\u662f\u91cd\u91cf\uff0c\u4ee5\u53ca\u52a8\u6001\u8f7d\u8377\uff0c\u4e5f\u5c31\u662f\u60ef\u6027\u529b\u3002\u9009\u578b\u65f6\u9700\u8981\u5206\u522b\u8ba1\u7b97\u4e09\u4e2a\u65b9\u5411\u4e0a\u7684\u53d7\u529b\uff1a\u5f84\u5411\u8f7d\u8377\u3001\u53cd\u5f84\u5411\u8f7d\u8377\u548c\u6a2a\u5411\u8f7d\u8377\u3002\u53ea\u6709\u8fd9\u6837\uff0c\u624d\u80fd\u9009\u62e9\u80fd\u591f\u627f\u53d7\u5b9e\u9645\u5de5\u51b5\u5e94\u529b\u7684\u6ed1\u5757\u3002<\/p>\n

1.1 <\/strong>\u8d28\u91cf\u4e0e\u91cd\u91cf\u7684\u533a\u522b<\/strong><\/h4>\n

\u4f60\u5fc5\u987b\u533a\u5206\u8d28\u91cfm<\/i><\/em>\u548c\u529bF<\/i><\/em>\u3002\u5de5\u7a0b\u8ba1\u7b97\u4e2d\uff0c\u529b\u7684\u6807\u51c6\u5355\u4f4d\u662f\u725b\u987fN<\/i><\/em>\u3002\u5982\u679c\u4e00\u4e2a\u5de5\u4ef6\u8d28\u91cf\u4e3a 50 kg\uff0c\u90a3\u4e48\u5b83\u5728\u91cd\u529b\u4f5c\u7528\u4e0b\u4ea7\u751f\u7684\u5411\u4e0b\u8f7d\u8377\u4e3a\uff1a<\/p>\n

\"\u533a\u5206\u8d28\u91cf\uff08$m$\uff09\u548c\u529b\uff08$F$\uff09\u3002\u5728\u5de5\u7a0b\u5b66\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u725b\u987f\uff08$N$\uff09\u4f5c\u4e3a\u529b\u7684\u6807\u51c6\u5355\u4f4d\u3002\u5982\u679c\u4e00\u4e2a\u5de5\u4ef6\u91cd<\/p>\n

If your machine is wall-mounted, this 490.5N doesn’t push “down” into the rail; it pulls “sideways” against the raceway. This is why the first step in any calculation is to draw a free-body diagram of your system.<\/p>\n

1.2 <\/strong>\u52a8\u6001\u989d\u5b9a\u8f7d\u8377 C \u548c 100 km\u6807\u51c6<\/strong><\/h4>\n

When you look at an IMTEK catalog, the “Basic Dynamic Load Rating” (C) refers to the constant load under which a group of identical linear guides can achieve a theoretical travel distance of 100km without surface fatigue. It is important to note that some Japanese brands use a 50km standard. To convert a 50km rating to a 100km rating, you must divide by 1.26.<\/p>\n

\u5728\u4f7f\u7528\u590d\u6742\u516c\u5f0f\u4e4b\u524d\uff0c\u5efa\u8bae\u5148 \u7406\u89e3\u9759\u989d\u5b9a\u8f7d\u8377\u548c\u52a8\u989d\u5b9a\u8f7d\u8377\u4e4b\u95f4\u7684\u533a\u522b\u3002<\/a> \u5f88\u591a\u9009\u578b\u9519\u8bef\uff0c\u6b63\u662f\u56e0\u4e3a\u628a\u8fd9\u4e24\u4e2a\u6982\u5ff5\u6df7\u7528\u4e86\u3002<\/p>\n

1.3 <\/strong>\u60ef\u6027\uff1a\u65e0\u58f0\u7684\u538b\u529b\u6e90<\/strong><\/h4>\n

\u52a0\u901f\u5ea6 a \u5fc5\u987b\u91cd\u70b9\u5173\u6ce8\u3002\u73b0\u4ee3 CNC \u8bbe\u5907\u6216 pick-and-place \u673a\u5668\u4eba\u5e38\u89c1\u7684\u52a0\u901f\u5ea6\u8303\u56f4\u4e3a 0.5g \u5230 2.0g\u3002<\/p>\n

\u60ef\u6027\u529b Fa<\/sub>\u7684\u8ba1\u7b97\u516c\u5f0f\u4e3a\uff1aFa<\/sub>\u00a0= m \u00d7 a<\/p>\n

\u5982\u679c\u4f60\u79fb\u52a8\u4e00\u4e2a 100 kg \u7684\u8d1f\u8f7d\uff0c\u5e76\u4e14\u52a0\u901f\u5ea6\u8fbe\u5230 1g\uff0c\u90a3\u4e48\u6bcf\u6b21\u542f\u52a8\u548c\u505c\u6b62\u65f6\uff0c\u8f74\u627f\u7cfb\u7edf\u627f\u53d7\u7684\u7b49\u6548\u8f7d\u8377\u51e0\u4e4e\u4f1a\u7ffb\u500d\u3002<\/p>\n\n\n\n\n\n\n\n
\u53d7\u529b\u7ec4\u6210<\/b><\/strong><\/td>\n\u516c\u5f0f<\/b><\/strong><\/td>\n\u5bf9\u5bff\u547d\u7684\u5f71\u54cd<\/b><\/strong><\/td>\n<\/tr>\n
\u9759\u6001\u91cd\u91cf<\/b><\/strong><\/td>\nm \u00d7\u00a0g<\/td>\n\u6301\u7eed\u4f5c\u7528\u7684\u57fa\u7840\u5e94\u529b<\/td>\n<\/tr>\n
\u60ef\u6027\u529b<\/b><\/strong><\/td>\nm \u00d7 a<\/td>\n\u542f\u52a8\u548c\u505c\u6b62\u65f6\u7684\u5cf0\u503c\u5e94\u529b<\/td>\n<\/tr>\n
\u5207\u524a\u529b \/ \u5916\u90e8\u5de5\u827a\u529b<\/b><\/strong><\/td>\nFext<\/sub><\/td>\n\u53d6\u51b3\u4e8e\u5177\u4f53\u5de5\u827a<\/td>\n<\/tr>\n
\u6469\u64e6\u529b<\/b><\/strong><\/td>\n\u03bc \u00d7 Fg<\/sub><\/td>\n\u901a\u5e38\u8f83\u5c0f\uff0c\u4f46\u4f1a\u5f71\u54cd\u7535\u673a\u626d\u77e9\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

 <\/p>\n

\n

2.Calculating Moments: The “Twisting” Forces That Cause Failure<\/h2>\n

The most common reason linear guides fail early isn’t because they were too small for the weight; it\u2019s because they were twisted. I remember a client who built a large 3D printer with a heavy extruder hanging far off to the side. The weight was small, but the “leverage” was huge. It acted like a giant wrench twisting the guide block every time it moved.<\/p>\n

\u7406\u89e3\u4fef\u4ef0\u3001\u504f\u6446\u548c\u6eda\u8f6c\u529b\u77e9<\/b><\/h3>\n

\u5f53\u529b\u4f5c\u7528\u70b9\u4e0e\u76f4\u7ebf\u5bfc\u8f68\u4e2d\u5fc3\u5b58\u5728\u8ddd\u79bb\u65f6\uff0c\u5c31\u4f1a\u4ea7\u751f\u529b\u77e9\u8f7d\u8377\u3002\u5e38\u89c1\u7684\u4e09\u7c7b\u529b\u77e9\u4e3a\uff1a\u4fef\u4ef0\u529b\u77e9\u3001\u504f\u6446\u529b\u77e9\u548c\u6eda\u8f6c\u529b\u77e9\u3002\n\n\u529b\u77e9\u7684\u8ba1\u7b97\u65b9\u6cd5\u662f\uff1a\n\n\u529b\u77e9 M = \u529b F \u00d7 \u529b\u81c2\u8ddd\u79bb<\/p>\n

\u8fd9\u4e09\u79cd\u529b\u77e9\u5bf9\u6ed1\u5757\u5185\u90e8\u6eda\u73e0\u7684\u5f71\u54cd\u4e0d\u540c\uff1a<\/p>\n