Grinding Machines and Spindle for Precision Robotics Bearings | ๋กœ๋ด‡ํ‹ฑ์Šค ๋ฒ ์–ด๋ง ์ •๋ฐ€๋„๋ฅผ ๊ตฌํ˜„ํ•˜๋Š” ์—ฐ์‚ญ ์žฅ๋น„์™€ ์Šคํ•€๋“ค

By ORSKOREA 16 min read
Grinding Machines and Spindle for Precision Robotics Bearings | ๋กœ๋ด‡ํ‹ฑ์Šค ๋ฒ ์–ด๋ง ์ •๋ฐ€๋„๋ฅผ ๊ตฌํ˜„ํ•˜๋Š” ์—ฐ์‚ญ ์žฅ๋น„์™€ ์Šคํ•€๋“ค
๐Ÿ’ก
Robotics bearings play an important role in robot joints and precision rotating axes. In our previous article, we looked at the roles of cross roller, thin section, and angular contact bearings. In this article, we explore the Grinding Machines and spindle technology used to machine robotics bearings and related precision components.

๋กœ๋ณดํ‹ฑ์Šค ๋ฒ ์–ด๋ง์€ ๋กœ๋ด‡ ๊ด€์ ˆ๊ณผ ์ •๋ฐ€ ํšŒ์ „์ถ•์—์„œ ์ค‘์š”ํ•œ ์—ญํ• ์„ ํ•ฉ๋‹ˆ๋‹ค. ์ง€๋‚œ ์ฝ˜ํ…์ธ ์—์„œ ํฌ๋กœ์Šค๋กค๋Ÿฌ ๋ฒ ์–ด๋ง, ๋ฐ•ํ˜• ๋ฒ ์–ด๋ง, ์•ต๊ทค๋Ÿฌ ์ฝ˜ํƒํŠธ ๋ฒ ์–ด๋ง์˜ ์—ญํ• ์„ ์‚ดํŽด๋ดค๋‹ค๋ฉด, ์ด๋ฒˆ ๊ธ€์—์„œ๋Š” ๋กœ๋ณดํ‹ฑ์Šค ๋ฒ ์–ด๋ง ๋ฐ ๊ด€๋ จ ์ •๋ฐ€ ๋ถ€ํ’ˆ ๊ฐ€๊ณต์— ํ™œ์šฉ๋˜๋Š” ์—ฐ์‚ญ ์žฅ๋น„์™€ ์Šคํ•€๋“ค ๊ธฐ์ˆ ์„ ์‚ดํŽด๋ณด๊ฒ ์Šต๋‹ˆ๋‹ค.

If you havenโ€™t read our previous article yet, take a look at how robotics bearings are used in robot joints and which bearing types are commonly considered for precision robotics applications.

์ด์ „ ์ฝ˜ํ…์ธ ๋ฅผ ์•„์ง ํ™•์ธํ•˜์ง€ ์•Š์œผ์…จ๋‹ค๋ฉด, ๋กœ๋ด‡ ๊ด€์ ˆ์—์„œ ๋ฒ ์–ด๋ง์ด ์–ด๋–ค ์—ญํ• ์„ ํ•˜๋Š”์ง€์™€ ์ •๋ฐ€ ๋กœ๋ณดํ‹ฑ์Šค ๋ถ„์•ผ์—์„œ ํ™œ์šฉ๋˜๋Š” ์ฃผ์š” ๋ฒ ์–ด๋ง ์ข…๋ฅ˜๋ฅผ ๋จผ์ € ์‚ดํŽด๋ณด์‹œ๊ธฐ ๋ฐ”๋ž๋‹ˆ๋‹ค.

robotics bearing
What Are Robotics Bearings?
๋กœ๋ณดํ‹ฑ์Šค ๋ฒ ์–ด๋ง์ด๋ž€?
Read the Article | ์•„ํ‹ฐํด ๋ฐ”๋กœ๊ฐ€๊ธฐ โ†’

Machining Accuracy Requirements for Robotics Bearings

๋กœ๋ด‡์šฉ ๋ฒ ์–ด๋ง์— ์š”๊ตฌ๋˜๋Š” ๊ฐ€๊ณต ์ •๋ฐ€๋„

Major Types of Bearings Used in Robotics | ๋กœ๋ณดํ‹ฑ์Šค ๋ฒ ์–ด๋ง ์ข…๋ฅ˜ โ“’ Chatgpt(AI-generated image)
Major Types of Bearings Used in Robotics | ๋กœ๋ณดํ‹ฑ์Šค ๋ฒ ์–ด๋ง ์ข…๋ฅ˜ โ“’ Chatgpt(AI-generated image)

Robotics bearings must maintain stable rotation through repeated acceleration, deceleration, and changes in direction. To achieve this, manufacturers need to control not only basic dimensions but also roundness, runout, concentricity, and surface quality with high precision.

These accuracy requirements are reflected in bearing tolerances measured at the micrometer (ฮผm) level. For example, for a P5-class angular contact ball bearing with a bore diameter over 30 mm and up to 50 mm, the bore diameter deviation is specified at 0 to -8 ฮผm, while inner-ring radial runout is limited to a maximum of 5 ฮผm.

Actual accuracy requirements may vary depending on bearing type, size, precision class, and operating conditions, but these values provide a useful reference for understanding the level of precision required in precision bearing manufacturing.

The accuracy of the bearing ringโ€™s inner diameter, outer diameter, and reference faces is also closely related to assembly quality with shafts and housings. As robotics systems become more compact and precise, the ability to machine these features consistently becomes increasingly important.

๋กœ๋ณดํ‹ฑ์Šค ๋ฒ ์–ด๋ง์€ ๋ฐ˜๋ณต์ ์ธ ๊ฐ€์†๊ณผ ์ •์ง€, ๋ฐฉํ–ฅ ์ „ํ™˜์—์„œ๋„ ์•ˆ์ •์ ์ธ ํšŒ์ „์„ ์œ ์ง€ํ•ด์•ผ ํ•ฉ๋‹ˆ๋‹ค. ์ด๋ฅผ ์œ„ํ•ด์„œ๋Š” ๊ธฐ๋ณธ ์น˜์ˆ˜๋ฟ ์•„๋‹ˆ๋ผ ์›ํ˜•๋„, ๋Ÿฐ์•„์›ƒ, ๋™์‹ฌ๋„, ํ‘œ๋ฉด ํ’ˆ์งˆ ๋“ฑ ๋‹ค์–‘ํ•œ ๊ฐ€๊ณต ์š”์†Œ๋ฅผ ์ •๋ฐ€ํ•˜๊ฒŒ ๊ด€๋ฆฌํ•ด์•ผ ํ•ฉ๋‹ˆ๋‹ค.

์ด๋Ÿฌํ•œ ์ •๋ฐ€๋„ ์š”๊ตฌ๋Š” ์‹ค์ œ ๋ฒ ์–ด๋ง ๊ณต์ฐจ์—์„œ๋„ ๋งˆ์ดํฌ๋กœ๋ฏธํ„ฐ(ฮผm) ๋‹จ์œ„๋กœ ๋‚˜ํƒ€๋‚ฉ๋‹ˆ๋‹ค. ์˜ˆ๋ฅผ ๋“ค์–ด ๋‚ด๊ฒฝ์ด 30 mm๋ฅผ ์ดˆ๊ณผํ•˜๊ณ  50 mm ์ดํ•˜์ธ P5๊ธ‰ ์•ต๊ทค๋Ÿฌ ์ฝ˜ํƒํŠธ ๋ณผ๋ฒ ์–ด๋ง์˜ ๊ฒฝ์šฐ, ๋‚ด๊ฒฝ ์น˜์ˆ˜ ํŽธ์ฐจ๋Š” 0~-8 ฮผm, ๋‚ด๋ฅœ์˜ ๋ฐฉ์‚ฌ ๋Ÿฐ์•„์›ƒ์€ ์ตœ๋Œ€ 5 ฮผm๋กœ ๊ทœ์ •๋ฉ๋‹ˆ๋‹ค.

์‹ค์ œ ์š”๊ตฌ ์ •๋ฐ€๋„๋Š” ๋ฒ ์–ด๋ง์˜ ์ข…๋ฅ˜์™€ ํฌ๊ธฐ, ์ •๋ฐ€๋„ ๋“ฑ๊ธ‰, ์ ์šฉ ์กฐ๊ฑด์— ๋”ฐ๋ผ ๋‹ฌ๋ผ์งˆ ์ˆ˜ ์žˆ์ง€๋งŒ, ์ด๋Ÿฌํ•œ ์ˆ˜์น˜๋Š” ์ •๋ฐ€ ๋ฒ ์–ด๋ง ์ œ์กฐ์—์„œ ์š”๊ตฌ๋˜๋Š” ์ •๋ฐ€๋„ ์ˆ˜์ค€์„ ์ดํ•ดํ•˜๋Š” ๋ฐ ์ฐธ๊ณ ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

๋˜ํ•œ ๋ฒ ์–ด๋ง ๋ง์˜ ๋‚ด๊ฒฝ, ์™ธ๊ฒฝ๊ณผ ๊ธฐ์ค€๋ฉด ์ •๋ฐ€๋„๋Š” ์ƒคํ”„ํŠธ ๋ฐ ํ•˜์šฐ์ง•๊ณผ์˜ ์กฐ๋ฆฝ ํ’ˆ์งˆ์—๋„ ๋ฐ€์ ‘ํ•˜๊ฒŒ ์—ฐ๊ฒฐ๋ฉ๋‹ˆ๋‹ค. ๋กœ๋ณดํ‹ฑ์Šค ์‹œ์Šคํ…œ์ด ๋”์šฑ ์†Œํ˜•ํ™”ยท์ •๋ฐ€ํ™”๋ ์ˆ˜๋ก ์ด๋Ÿฌํ•œ ์š”์†Œ๋ฅผ ์ผ๊ด€๋œ ํ’ˆ์งˆ๋กœ ๊ฐ€๊ณตํ•˜๋Š” ๊ธฐ์ˆ ์˜ ์ค‘์š”์„ฑ๋„ ๋†’์•„์ง‘๋‹ˆ๋‹ค.

Grinding Machines for Robotics Bearings and Precision Components

๋กœ๋ด‡์šฉ ๋ฒ ์–ด๋ง๊ณผ ์ •๋ฐ€ ๋ถ€ํ’ˆ ๊ฐ€๊ณต์„ ์œ„ํ•œ ์—ฐ์‚ญ ์žฅ๋น„