---
title: "剪切式与自由套料：板材切割到底怎么运作"
description: "为什么每一刀都应该贯穿整张板材——以及自由套料什么时候才真正占优。"
image: "https://nestingcalc.com/og-default.png"
url: "https://nestingcalc.com/cn/guides/guillotine-vs-nesting/"
locale: "zh-Hans"
---

# 剪切式与自由套料：板材切割到底怎么运作

为什么每一刀都应该贯穿整张板材——以及自由套料什么时候才真正占优。

## 剪切式切割的含义

剪切式（guillotine）切割贯穿整张板材或整条板条，从边到边。推台锯、台锯、玻璃划线与大多数剪切设备都是这么切的。圆锯无法切到一半停下再从别处继续——所以切割方案必须服从这一点。

## 行排（层架）是实用的排料模式

专业的板材排料把工件排成水平行：一行放同一高度的工件，锯一次横切把整行切下来，再逐件纵切。这正是板材切割计算器输出的结果——每张图都能直接在推台锯上执行。

## 自由套料在纸面上更好看

自由（真实轮廓）套料可以任意角度旋转工件并把它们像拼图一样互锁，通常能多挤出几个百分点的利用率。但这种排布需要 CNC 雕刻机或激光才能执行——锯不能切任意角度，而且搬运小块互锁工件也很浪费时间。

## 锯缝改变几何

每一刀剪切都沿全长消耗锯片宽度。4 mm 锯缝横穿 2440 mm 板材，每刀损失近 10 cm² 材料——每张板 30 刀就是肉眼可见的损失。计算器在每一行与每一个工件边界都预留锯缝。

## 你该用哪种？

用锯或剪切下料？用剪切式排布——画出来就能切。用带整板真空吸附的 CNC 雕刻机？在贵重材料上自由套料可能划算。大多数车间靠良好的行排方案做到 85–92% 的利用率，这已经接近自由套料在实践中的水平。

[打开线性切割计算器](https://nestingcalc.com/cn/linear-cutting-calculator/) [打开板材切割计算器](https://nestingcalc.com/cn/sheet-cutting-calculator/)

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