钣金折弯时，为什么回弹让尺寸总差一点？
Why does springback make bent sheet metal slightly off?
金属弹性部分在卸载后会部分恢复，使折角小于模具角；要靠补偿角度、加压矫形或选材来控制回弹误差。
Elastic recovery after unloading springs the bend back, so dies must over-bend or coining and material choice control the error.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-10-03
来源 · Source
Kalpakjian & Schmid《制造工程与技术》；Groover《现代制造基础》；AWS 美国焊接学会标准
Kalpakjian & Schmid, Manufacturing Engineering and Technology; Groover, Fundamentals of Modern Manufacturing; AWS standards
独立核验依据 · Independent verification: 核验依据 1 ISBN 9789810694067 (7th SI Edition, (c)2014)
#钣金 #回弹 #折弯
装配线为什么常把节拍卡得很死，慢一点会怎样？
Why is line takt so tight, what if one station is slow?
节拍由客户需求定，任一工位超时会在线旁堆积半成品、拖垮整线产出；平衡工位和防错是关键。
Takt is set by demand; a slow station backs up WIP and drags output, so line balancing and mistake-proofing matter.
难度 专业 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-10-03
来源 · Source
Kalpakjian & Schmid《制造工程与技术》；Groover《现代制造基础》；AWS 美国焊接学会标准
Kalpakjian & Schmid, Manufacturing Engineering and Technology; Groover, Fundamentals of Modern Manufacturing; AWS standards
独立核验依据 · Independent verification: 核验依据 1 ISBN 9789810694067 (7th SI Edition, (c)2014)
#节拍 #平衡 #防错
金属件表面做阳极氧化是什么，和喷漆是一回事吗？
What is anodizing, is it the same as painting?
不是。阳极氧化在铝等表面用电化学长出致密氧化层，既着色又耐磨防腐；喷漆只是外层覆盖，附着力与寿命不同。
Anodizing grows a dense oxide layer electrochemically for color, wear, and corrosion resistance; paint merely coats the surface.
难度 专业 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-10-03
来源 · Source
Kalpakjian & Schmid《制造工程与技术》；Groover《现代制造基础》；AWS 美国焊接学会标准
Kalpakjian & Schmid, Manufacturing Engineering and Technology; Groover, Fundamentals of Modern Manufacturing; AWS standards
独立核验依据 · Independent verification: 核验依据 1 ISBN 9789810694067 (7th SI Edition, (c)2014)
#阳极氧化 #铝 #表面处理
焊接时为什么常围着一团保护气，是怕焊点氧化吗？
Why is there often shielding gas around a weld?
是的。氩气等保护气把空气隔开，防止熔池氧化、气孔和脆化，焊缝才牢固美观。
Shielding gas keeps air away from the molten pool to prevent oxidation, porosity, and brittleness for sound welds.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-10-03
来源 · Source
Kalpakjian & Schmid《制造工程与技术》；Groover《现代制造基础》；AWS 美国焊接学会标准
Kalpakjian & Schmid, Manufacturing Engineering and Technology; Groover, Fundamentals of Modern Manufacturing; AWS standards
独立核验依据 · Independent verification: 核验依据 1 ISBN 9789810694067 (7th SI Edition, (c)2014)
#焊接 #保护气 #氧化
数控机床怎么知道刀该走到哪儿、转多快？
How does a CNC machine know where to move the tool and how fast?
工程师把图纸编成G代码，控制系统按代码驱动机床三轴并读取编码器反馈实时纠偏，精度和重复定位都很高。
A program drives the axes while encoders feed position back for correction, giving high precision and repeatability.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-10-03
来源 · Source
Kalpakjian & Schmid《制造工程与技术》；Groover《现代制造基础》；AWS 美国焊接学会标准
Kalpakjian & Schmid, Manufacturing Engineering and Technology; Groover, Fundamentals of Modern Manufacturing; AWS standards
独立核验依据 · Independent verification: 核验依据 1 ISBN 9789810694067 (7th SI Edition, (c)2014)
#数控 #G代码 #编码器
数控机床喷的那层冷却液有什么用，不用行不行？
What does cutting fluid do, can you skip it?
冷却液降温、润滑并冲走切屑，保护刀具和工件、提升表面质量；干切虽可行但刀具磨损快、精度难保。
Coolant cools, lubricates, and flushes chips to protect tool and finish; dry cutting wears tools fast and hurts accuracy.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-10-03
来源 · Source
Kalpakjian & Schmid《制造工程与技术》；Groover《现代制造基础》；AWS 美国焊接学会标准
Kalpakjian & Schmid, Manufacturing Engineering and Technology; Groover, Fundamentals of Modern Manufacturing; AWS standards
独立核验依据 · Independent verification: 核验依据 1 ISBN 9789810694067 (7th SI Edition, (c)2014)
#冷却液 #润滑 #刀具
激光切割为什么能隔空把钢板切开，还不碰到工件？
How does laser cutting slice steel without touching it?
聚焦的激光在极小光斑释放极高能量熔化或气化金属，同时喷辅助气体吹走熔渣；非接触故无刀具磨损。
A focused beam melts and vaporizes metal while assist gas blows away slag; being non-contact, it avoids tool wear.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-10-03
来源 · Source
Kalpakjian & Schmid《制造工程与技术》；Groover《现代制造基础》；AWS 美国焊接学会标准
Kalpakjian & Schmid, Manufacturing Engineering and Technology; Groover, Fundamentals of Modern Manufacturing; AWS standards
独立核验依据 · Independent verification: 核验依据 1 ISBN 9789810694067 (7th SI Edition, (c)2014)
#激光切割 #辅助气体 #非接触
金属砂型铸造为什么能做出发动机缸体这样复杂的大件？
How can sand casting make complex big parts like engine blocks?
用型砂按模样做出空腔，浇入铁水冷却后破砂取件，几乎不受形状复杂度限制；精度不如切削但适合大件小批。
Sand molding forms a cavity from a pattern; poured metal cools and the sand is broken away, shapes can be complex, good for big low-volume parts.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-10-03
来源 · Source
Kalpakjian & Schmid《制造工程与技术》；Groover《现代制造基础》；AWS 美国焊接学会标准
Kalpakjian & Schmid, Manufacturing Engineering and Technology; Groover, Fundamentals of Modern Manufacturing; AWS standards
独立核验依据 · Independent verification: 核验依据 1 ISBN 9789810694067 (7th SI Edition, (c)2014)
#铸造 #砂型 #铁水
工厂流水线为什么爱用传送带，而不是让人搬来搬去？
Why do lines love conveyors instead of people carrying parts?
传送带把工序连成节拍一致的连续流，减少搬运等待、平衡各工位产能；节拍由需求决定。
Conveyors link stations into a paced flow, cutting handling and balancing work; takt time is set by demand.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-10-03
来源 · Source
Kalpakjian & Schmid《制造工程与技术》；Groover《现代制造基础》；AWS 美国焊接学会标准
Kalpakjian & Schmid, Manufacturing Engineering and Technology; Groover, Fundamentals of Modern Manufacturing; AWS standards
独立核验依据 · Independent verification: 核验依据 1 ISBN 9789810694067 (7th SI Edition, (c)2014)
#流水线 #传送带 #节拍
塑料外壳（如遥控器壳）是怎么变出来的，不是切出来的？
How is a plastic shell made, not cut out?
多为注塑：把塑料粒加热熔化射进钢模，冷却定型后开模顶出；模具决定形状，可大批量、低成本复制。
Injection molding melts pellets, injects them into a steel mold, cools, and ejects the part, great for cheap mass copying.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-10-03
来源 · Source
Kalpakjian & Schmid《制造工程与技术》；Groover《现代制造基础》；AWS 美国焊接学会标准
Kalpakjian & Schmid, Manufacturing Engineering and Technology; Groover, Fundamentals of Modern Manufacturing; AWS standards
独立核验依据 · Independent verification: 核验依据 1 ISBN 9789810694067 (7th SI Edition, (c)2014)
#注塑 #模具 #塑料
为什么绝大多数螺丝是向右（顺时针）拧紧的？
Why do most screws tighten clockwise?
主要是约定俗成，右旋螺纹配右手发力更顺；统一方向避免装反，少数左扣用于防松脱的特殊轴。
Right-hand threads became standard because they suit right-handed tightening; uniformity prevents mistakes, with left-hand used rarely to avoid loosening.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-10-03
来源 · Source
Kalpakjian & Schmid《制造工程与技术》；Groover《现代制造基础》；AWS 美国焊接学会标准
Kalpakjian & Schmid, Manufacturing Engineering and Technology; Groover, Fundamentals of Modern Manufacturing; AWS standards
独立核验依据 · Independent verification: 核验依据 1 ISBN 9789810694067 (7th SI Edition, (c)2014)
#螺丝 #右旋 #标准
工厂里质检为什么有的用相机而不是人眼？
Why do some inspections use a camera instead of human eyes?
机器视觉相机配算法能毫秒级识别划痕、尺寸和错装，稳定不疲劳；适合高速重复检验，人眼易漏检。
Machine vision spots scratches, dimensions, and misassembly in milliseconds without fatigue, suiting high-speed checks.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-10-03
来源 · Source
Kalpakjian & Schmid《制造工程与技术》；Groover《现代制造基础》；AWS 美国焊接学会标准
Kalpakjian & Schmid, Manufacturing Engineering and Technology; Groover, Fundamentals of Modern Manufacturing; AWS standards
独立核验依据 · Independent verification: 核验依据 1 ISBN 9789810694067 (7th SI Edition, (c)2014)
#机器视觉 #质检 #检测