[{"data":1,"prerenderedAt":407},["ShallowReactive",2],{"post-zh-guides-cnc-workholding-basics-keep-the-workpiece-still":3,"header-article-translation-zh-guides-cnc-workholding-basics-keep-the-workpiece-still":217,"trans-cnc-workholding-basics-zh":218},{"id":4,"title":5,"body":6,"category":181,"date":182,"description":183,"difficulty":184,"draft":185,"duration":186,"extension":187,"featured":185,"image":188,"layout":191,"locale":192,"meta":193,"navigation":194,"path":195,"references":196,"related":186,"section":209,"seo":210,"slug":211,"status":186,"stem":212,"tags":213,"translationKey":215,"updated":186,"video":186,"__hash__":216},"content\u002Fzh\u002Fguides\u002Fcnc-workholding-basics-keep-the-workpiece-still.md","CNC 工件夹持基础：让工件保持不动",{"type":7,"value":8,"toc":169},"minimark",[9,13,16,24,28,31,34,37,40,43,46,49,52,55,58,61,64,67,70,73,76,79,82,85,89,92,95,98,101,104,107,110,113,160,163,166],[10,11,12],"p",{},"无论材料是否还在你放置的位置，CNC 雕刻机都会照着刀路走。如果坯料在作业中途滑动、翘起或脱开，机器会像什么都没发生一样继续切削。工件夹持就是装夹准备中的这一环：让工件留在刀路所假定的位置上。",[10,14,15],{},"本文说明工件夹持为什么重要，介绍初学者常用的几种方法及各自适合的情形，最后给出一组开切前的简短检查。内容依据 Sienci Labs 和 Easel 公开发布的厂商资料。请把文中的例子当作一般思路的示意；你的机器、垫板和夹具可能需要不同的细节。",[17,18,21],"cnc-warning",{"level":19,"title":20},"warning","本文是入门说明，不是安全规程",[10,22,23],{},"夹持方法、夹具硬件和安全的切削参数取决于机器、材料和刀具。请遵循你所用机器的文档；一旦工件发生移动，请停止作业。",[25,26,27],"h2",{"id":27},"为什么工件夹持很重要",[10,29,30],{},"Sienci Labs 的工件夹持指南把“将材料固定到机器台面”称为 CNC 新手要学的最重要技能之一。按它的说法，稳固的夹持能防止坯料在切削中移动、滑动或发生碰撞，从而保护作品、刀具和机器。",[10,32,33],{},"Easel 关于夹持的帮助文章列出了夹持不良可能带来的后果：断刀、机器偏离预定路径雕刻，以及其他雕刻错误。文章还提到，在进给过于激进且夹持很差的情况下，材料可能从机器上飞出。同一篇文章也说明了这层关系的另一面：夹持牢固的材料可以承受更激进的进给和转速，因为刀具不容易受到材料阻力的影响。",[10,35,36],{},"所以工件夹持同时影响三件事。它关系到安全，因为松动的坯料和断裂的刀具都是危险源。它关系到质量，因为发生位移的零件会被切在错误的位置。它也关系到可重复性，因为能够复现的装夹，才能让你再次运行同一个作业并得到相同的结果。",[25,38,39],{"id":39},"没有唯一的最佳方法",[10,41,42],{},"两份资料用不同的方式表达了同一点：合适的方法取决于作业本身。Sienci 的指南指出，有些方法夹得牢但会碍事，有些方法外形低矮但夹持力较弱，好的装夹往往会组合使用不止一种方法。它建议在选择时考虑材料类型、切削方式和刀路。",[10,44,45],{},"下面几节介绍初学者最先会遇到的四种做法。同一份指南还介绍了 T 型槽、螺纹嵌件、台钳、定位孔、靠山和真空台。这些需要更多硬件或准备工作，留待以后再讲。",[25,47,48],{"id":48},"压板与夹具",[10,50,51],{},"夹具把材料压在垫板上，并且可以在不同项目之间重复使用。Sienci 的指南这样描述顶部压板：从上方施加压力，适合平整的工件、雕刻和一般切削。侧向夹具和趾形夹具则从工件边缘向下、向内拉紧材料，使顶面保持空出，便于进行铣平之类的操作。",[10,53,54],{},"Easel 的文章建议，当项目要用到整块材料，或者用到的部分多到你不愿意在上面钻安装孔时，采用夹具固定。",[10,56,57],{},"夹具的主要风险在于，它们正好处在刀具要经过的地方。Sienci 列出的夹具问题包括：干涉刀路；压力不均导致工件翘曲或抬起；金属夹具在软材料上留下压痕；长时间切削中夹具因振动而松动；以及拧得过紧导致材料开裂或变形。它给出的对策是：把夹具位置安排在刀路之外，并在 CAM 软件中模拟作业；均匀地拧紧夹具；在接触点加垫；开始前再次检查松紧；只施加足以固定材料的压力。",[10,59,60],{},"Easel 从软件一侧给出了同样的建议：在夹持之前先模拟刀路，可以看到刀具将经过哪些位置，并据此安排夹具。",[25,62,63],{"id":63},"螺丝",[10,65,66],{},"把坯料直接用螺丝固定在垫板上，不需要任何专用硬件。Sienci 的指南提到，新手往往从这种方法开始；它适合螺丝可以避开刀路的大块或厚实坯料。它不适合脆性材料、有外观要求的表面、小零件，以及不能留孔的项目。",[10,68,69],{},"Easel 介绍了一种相近的做法：在坯料上钻孔，用螺栓穿过坯料拧入垫板上的螺纹嵌件。文章称，在不需要用到整块材料的情况下，这是最牢固的方法，因为它要求在材料上打孔。",[10,71,72],{},"螺丝也有自己的问题。Sienci 的指南提醒，刀具撞到螺丝会断刀、损坏主轴并毁掉作品，因此需要事先规划螺丝位置，并对照刀路进行核对。它还提到：螺丝过长会穿透台面；不预先钻孔时，木材靠近边缘处容易开裂；大张板材只固定四角时，中间可能向上拱起；螺丝在振动下会逐渐退出。",[25,74,75],{"id":75},"胶带",[10,77,78],{},"粘接类方法从下方固定工件，使顶面和边缘都保持空出。Sienci 的指南介绍了其中一种做法：在垫板和坯料上各贴一层美纹纸，再在两层美纹纸之间涂 CA 胶。它推荐把这种方法用于小而薄的零件，以及表面光滑的轻质材料，并建议不要用于重切削、不平整的表面和较高的坯料。",[10,80,81],{},"Easel 的文章称，双面胶是固定很薄的材料的可靠方式，并把夹具与双面胶组合使用描述为固定材料最可靠的方式之一。",[10,83,84],{},"胶带的效果取决于它所粘贴的表面。根据 Sienci 的指南，灰尘、油污或不平整的表面会削弱粘接，可能让零件在切削中移位；激进的走刀或大直径刀具可能超过粘接力；在过冷或过热的车间里，胶粘剂的强度也可能下降。它的建议是：清洁两个表面，采用较轻的走刀，在切削负荷较大时加用夹具。",[25,86,88],{"id":87},"连接桥tabs","连接桥（Tabs）",[10,90,91],{},"连接桥解决的是另一个问题。当刀路把一个形状从坯料中完全切出时，最后一刀完成后，这个形状就不再与任何东西相连。Easel 关于连接桥的文章说明，脱开的零件随后可能被刀具损坏。连接桥是保留下来不切的小段材料，它让这个形状继续与周围的坯料相连，而周围的坯料本身是被固定住的。",[10,93,94],{},"Sienci 的指南把连接桥描述为一种基于软件的方法，需要与实体夹持配合使用。它们在刀路设计阶段添加，在加工完成后去除。",[10,96,97],{},"连接桥固定的是零件，不是坯料。它不能替代夹具、螺丝或胶带；它的作用是让切出的零件留在已经固定好的坯料之中。",[10,99,100],{},"连接桥的尺寸和位置需要权衡。Sienci 的指南指出，连接桥过薄或过短可能在切削中断开，过厚则会在之后留下更多需要清理的材料；用手掰断连接桥可能使木材起刺。它建议用锯或凿子把连接桥切断。",[10,102,103],{},"Easel 建议把连接桥放在容易够到、也容易打磨的位置，即平滑的直线段上，并避开拐角和圆弧边。",[10,105,106],{},"如果关闭连接桥，切出的零件就需要用别的方式保持不动。Easel 的文章提到，有些用户在把形状完全切出时，会在形状下方贴双面胶，并取得了成功。",[25,108,109],{"id":109},"开切前的检查",[10,111,112],{},"这些检查是对上文要点的归纳，并不是一套完整的安全规程。",[114,115,116,124,130,136,142,148,154],"ol",{},[117,118,119,123],"li",{},[120,121,122],"strong",{},"用手推一推坯料。"," 如果你能把它推动或抬起，刀具也能。",[117,125,126,129],{},[120,127,128],{},"对照刀路检查固定件。"," 模拟或预览作业，确认没有夹具、螺丝或治具挡在刀具的路径上，包括两次切削之间的移动。",[117,131,132,135],{},[120,133,134],{},"留意大块或较薄坯料的中间部位。"," 只在边缘或四角固定的材料可能向上拱起。在翘起的地方增加支撑。",[117,137,138,141],{},[120,139,140],{},"考虑会被完全切出的零件。"," 确认已经设置连接桥，或者零件由胶带或其他方法固定。",[117,143,144,147],{},[120,145,146],{},"清洁接触面。"," 坯料下方或贴胶带的表面上若有切屑或灰尘，会削弱固定效果。",[117,149,150,153],{},[120,151,152],{},"长时间作业前再次检查松紧。"," 振动可能使夹具和螺丝松动。",[117,155,156,159],{},[120,157,158],{},"让切削与夹持相匹配。"," 夹持较弱时应采用较轻的走刀；切削负荷较大时应采用更牢固的夹持或组合夹持。",[25,161,162],{"id":162},"组合使用",[10,164,165],{},"Sienci 的指南在结尾指出，没有哪一种方法能覆盖所有项目，高效的装夹会根据材料、切削类型和所需的避让空间来选择并组合不同的方法。夹具加上底部的胶带，或者用夹具固定坯料、再用连接桥固定切出的零件，就是这些资料所描述的两种组合。",[10,167,168],{},"方法本身不如结果重要。在主轴启动之前，工件应当无法移动，并且用来固定它的任何东西都不应处在刀具的路径上。",{"title":170,"searchDepth":171,"depth":171,"links":172},"",2,[173,174,175,176,177,178,179,180],{"id":27,"depth":171,"text":27},{"id":39,"depth":171,"text":39},{"id":48,"depth":171,"text":48},{"id":63,"depth":171,"text":63},{"id":75,"depth":171,"text":75},{"id":87,"depth":171,"text":88},{"id":109,"depth":171,"text":109},{"id":162,"depth":171,"text":162},"machine-basics","2026-10-02","说明工件夹持为什么影响安全与可重复性，并给出与具体硬件无关的检查项。","beginner",false,null,"md",{"src":189,"alt":190},"\u002Fmedia\u002Fasset-beginner-cnc-workholding-cover-v1-8aafb08cf479.webp","CNC 雕刻机台面上，两个压板夹具固定着一块木料，上方是立铣刀","article","zh",{},true,"\u002Fzh\u002Fguides\u002Fcnc-workholding-basics-keep-the-workpiece-still",[197,201,205],{"id":198,"title":199,"url":200},"source-85b0a114d3ec0d66","Clamping\u002FSecuring Material","https:\u002F\u002Fsupport.easel.com\u002Fhc\u002Fen-us\u002Farticles\u002F38443313818515-Clamping-Securing-Material",{"id":202,"title":203,"url":204},"source-88cef5c0e915919f","How To Use Tabs","https:\u002F\u002Fsupport.easel.com\u002Fhc\u002Fen-us\u002Farticles\u002F360012453214-How-To-Use-Tabs",{"id":206,"title":207,"url":208},"source-566b8a22e46943df","Workholding","https:\u002F\u002Fresources.sienci.com\u002Fview\u002Fcnc-workholding\u002F","guides",{"title":5,"description":183},"cnc-workholding-basics-keep-the-workpiece-still","zh\u002Fguides\u002Fcnc-workholding-basics-keep-the-workpiece-still",[214,184],"cnc","cnc-workholding-basics","eO1xncvBj1-FqheO0roT102YzIQ5Rz2Sd1EOWvQjk5Q",{"section":209,"slug":211},{"id":219,"title":220,"body":221,"category":181,"date":182,"description":393,"difficulty":184,"draft":185,"duration":186,"extension":187,"featured":185,"image":394,"layout":191,"locale":396,"meta":397,"navigation":194,"path":398,"references":399,"related":186,"section":209,"seo":403,"slug":211,"status":186,"stem":404,"tags":405,"translationKey":215,"updated":186,"video":186,"__hash__":406},"content\u002Fen\u002Fguides\u002Fcnc-workholding-basics-keep-the-workpiece-still.md","CNC Workholding Basics: Keep the Workpiece Still",{"type":7,"value":222,"toc":383},[223,226,229,235,239,242,245,248,252,255,258,262,265,268,271,274,278,281,284,287,291,294,297,300,304,307,310,313,316,319,322,326,329,373,377,380],[10,224,225],{},"A CNC router follows its toolpath whether or not the material stays where you put it. If the stock slides, lifts, or breaks free partway through a job, the machine keeps cutting as though nothing changed. Workholding is the part of setup that keeps the workpiece in the position the toolpath assumes.",[10,227,228],{},"This guide explains why workholding matters, describes the common beginner methods and the situations each one suits, and ends with a short set of checks to run before a cut. It draws on published vendor guidance from Sienci Labs and Easel. Treat the examples as illustrations of general ideas; your machine, wasteboard, and clamps may call for different details.",[17,230,232],{"level":19,"title":231},"This is orientation, not a safety procedure",[10,233,234],{},"Holding methods, clamp hardware, and safe cutting settings depend on the machine, the material, and the tool. Follow the documentation for your own machine and stop the job if the workpiece moves.",[25,236,238],{"id":237},"why-workholding-matters","Why workholding matters",[10,240,241],{},"Sienci Labs' workholding guide describes securing material to the machine bed as one of the most important skills a new CNC user learns. In its words, rigid workholding keeps stock from moving, sliding, or crashing during a cut, which protects the project, the tools, and the machine.",[10,243,244],{},"Easel's help article on clamping lists what can follow from a poor hold: broken bits, the machine carving off its intended path, and other carving errors. It adds that with an aggressive feed rate and very poor clamping, the material may come off the machine. The same article notes the other side of the relationship: a firmly held workpiece lets you run faster feeds and speeds, since the push-back from the material is less likely to knock the bit off course.",[10,246,247],{},"So workholding affects three things at once. It is a safety matter, because loose stock and broken tools are hazards. It is a quality matter, because a part that shifts is cut in the wrong place. And it is a repeatability matter, because a setup you can reproduce lets you run the same job again and expect the same result.",[25,249,251],{"id":250},"there-is-no-single-best-method","There is no single best method",[10,253,254],{},"Both sources make the same point in different ways: the right method depends on the job. Sienci's guide describes it as a trade-off: the strongest options tend to obstruct the cutting area, the least obtrusive ones grip with less force, and a good setup often mixes several of them. It suggests considering the material type, the style of cut, and the toolpath when choosing.",[10,256,257],{},"The sections below cover four approaches a beginner is likely to meet first. The same guide also describes T-tracks, threaded inserts, vises, dog holes, fences, and vacuum tables. Those need more hardware or preparation and are left for later.",[25,259,261],{"id":260},"clamps","Clamps",[10,263,264],{},"Clamps press the material against the wasteboard and can be reused across projects. Sienci's guide describes top hold-down clamps as applying pressure from above, which suits flat workpieces, engraving, and general cutting. Side and toe clamps pull the material down and inward from its edges, which leaves the top surface clear for operations such as surfacing.",[10,266,267],{},"Easel's article recommends clamping when a project uses the full piece of material, or enough of it that you would not want to drill mounting holes through it.",[10,269,270],{},"The main risk with clamps is that they sit where the tool wants to go. Sienci's list of clamp problems includes toolpath interference, uneven pressure that warps or lifts the workpiece, metal clamps marking soft materials, clamps loosening under vibration during long cuts, and over-tightening that cracks or distorts the material. Its suggested responses are to plan clamp positions outside the toolpath and simulate the job in CAM software, tighten clamps evenly, pad the contact points, recheck tightness before starting, and apply only enough pressure to hold the material.",[10,272,273],{},"Easel gives the same advice from the software side: simulating the toolpath before clamping lets you see where the tool will travel and place clamps accordingly.",[25,275,277],{"id":276},"screws","Screws",[10,279,280],{},"Screwing the stock directly to the wasteboard needs no special hardware. Sienci's guide notes that first-time users often start with this method, and that it suits large or thick stock where screws can be placed away from the toolpath. It is a poor fit for brittle materials, cosmetic surfaces, small parts, and projects that cannot have holes in them.",[10,282,283],{},"Easel describes a related approach: bolting the material to threaded inserts in the wasteboard through holes drilled in the stock. It calls this the most secure method for cases where you are not using the whole piece, since it requires holes through the material.",[10,285,286],{},"Screws bring their own problems. Sienci's guide warns that a bit striking a screw can snap, harm the spindle, and spoil the workpiece, so screw positions need to be planned and checked against the toolpath. It also mentions screws that are too long passing through the table, wood splitting near edges unless holes are pre-drilled, large sheets bowing upward in the middle when fixed only at the corners, and screws backing out under vibration.",[25,288,290],{"id":289},"tape","Tape",[10,292,293],{},"Adhesive methods hold the workpiece from underneath, which leaves the top and edges clear. Sienci's guide describes one version: painter's tape on both the wasteboard and the stock, with CA glue between the two tape layers. It recommends this for small or thin parts and light materials with smooth surfaces, and advises against it for heavy cuts, uneven surfaces, and tall stock.",[10,295,296],{},"Easel's article calls double-sided tape a reliable way to secure very thin materials, and describes a combination of clamps and double-sided tape as one of the most reliable ways to keep material secure.",[10,298,299],{},"Tape depends on the surfaces it sticks to. According to Sienci's guide, dust, oil, or uneven surfaces weaken the bond and can let parts shift mid-cut; aggressive passes or large bits can overcome the adhesive; and adhesives can lose strength in a cold or hot workshop. Its suggestions are to clean both surfaces, take lighter passes, and add clamps when the cut is demanding.",[25,301,303],{"id":302},"tabs","Tabs",[10,305,306],{},"Tabs solve a different problem. When a toolpath cuts a shape completely out of the stock, the shape is no longer attached to anything once the last pass finishes. Easel's article on tabs explains that the freed piece can then be damaged by the bit. Tabs are small bridges of uncut material that keep the shape connected to the surrounding stock, which is itself held down.",[10,308,309],{},"Sienci's guide describes tabs as a software-based method that works together with physical workholding. They are added during toolpath design and removed after machining.",[10,311,312],{},"Tabs hold the part, not the stock. They do not replace clamps, screws, or tape; they keep a cutout in place within stock that is already secured.",[10,314,315],{},"Tab size and position involve trade-offs. Sienci's guide notes that tabs that are too thin or too short can break during cutting, while thick tabs leave more material to remove afterwards, and that snapping tabs by hand can splinter wood. It suggests cutting them with a saw or chisel.",[10,317,318],{},"Easel recommends placing tabs where they are easy to reach and easy to sand, on smooth, straight sections and away from corners and rounded edges.",[10,320,321],{},"If you turn tabs off, the cutout needs another way to stay put. Easel's article says some users have success with double-sided tape under the shape when cutting it out fully.",[25,323,325],{"id":324},"checks-before-you-cut","Checks before you cut",[10,327,328],{},"These checks summarize the points above. They are not a complete safety procedure.",[114,330,331,337,343,349,355,361,367],{},[117,332,333,336],{},[120,334,335],{},"Push the stock by hand."," If you can shift or lift it, the cutter can too.",[117,338,339,342],{},[120,340,341],{},"Compare the hold-downs with the toolpath."," Simulate or preview the job and confirm that no clamp, screw, or fixture lies in the tool's way, including during moves between cuts.",[117,344,345,348],{},[120,346,347],{},"Look at the middle of large or thin stock."," Material held only at its edges or corners can bow upward. Add support where it lifts.",[117,350,351,354],{},[120,352,353],{},"Account for parts that will be cut free."," Confirm that tabs are present, or that the piece is held by tape or another method.",[117,356,357,360],{},[120,358,359],{},"Clean the contact surfaces."," Chips or dust under the stock or on taped surfaces weaken the hold.",[117,362,363,366],{},[120,364,365],{},"Recheck tightness before a long job."," Vibration can loosen clamps and screws.",[117,368,369,372],{},[120,370,371],{},"Match the cut to the hold."," A light hold calls for lighter passes; a demanding cut calls for a stronger or combined hold.",[25,374,376],{"id":375},"combining-methods","Combining methods",[10,378,379],{},"Sienci's guide closes with the observation that no single method covers every project, and that efficient setups pick and combine techniques according to the material, the type of cut, and the clearance needed. Clamps with tape underneath, or clamped stock with tabs holding the cutouts, are two examples of the combinations these sources describe.",[10,381,382],{},"The method matters less than the outcome. Before the spindle starts, the workpiece should be unable to move, and nothing holding it should be in the path of the tool.",{"title":170,"searchDepth":171,"depth":171,"links":384},[385,386,387,388,389,390,391,392],{"id":237,"depth":171,"text":238},{"id":250,"depth":171,"text":251},{"id":260,"depth":171,"text":261},{"id":276,"depth":171,"text":277},{"id":289,"depth":171,"text":290},{"id":302,"depth":171,"text":303},{"id":324,"depth":171,"text":325},{"id":375,"depth":171,"text":376},"Why workholding affects safety and repeatability, the common beginner methods, and what to check before a cut.",{"src":189,"alt":395},"A block of wood held on a CNC router bed by two step clamps, with an end mill above it","en",{},"\u002Fen\u002Fguides\u002Fcnc-workholding-basics-keep-the-workpiece-still",[400,401,402],{"id":198,"title":199,"url":200},{"id":202,"title":203,"url":204},{"id":206,"title":207,"url":208},{"title":220,"description":393},"en\u002Fguides\u002Fcnc-workholding-basics-keep-the-workpiece-still",[214,184],"STGXSkeDesCsE9zQJnHkUJ2iZhIBmz-zdSlMCK7Ut0U",1792396297865]