要点速览

让散热器供应商一次报准价的八项资料:STEP模型、GD&T图纸、合金牌号、表面处理、数量、热性能目标、使用环境与贸易术语。

Nov 04,2026

散热器询价:一份图纸该包含什么

直接回答:想让散热器报价一轮到位而不是来回五轮,需要提供八项资料:STEP 格式的 3D 模型、带 GD&T 的 2D 图纸、合金牌号与状态、表面处理与颜色、订单数量与年用量、关键公差要求、工作环境(含散热方式与环温)、以及要求的贸易术语。缺任何一项,通常会给报价增加 1-3 天的一轮往返。

八项清单

资料供应商为什么需要缺失会怎样
STEP 3D 模型决定 CNC 编程与工装;STEP 无歧义,PDF 有供应商自行建模、猜特征,报的是另一个零件
带 GD&T 的 2D 图纸承载平面度、垂直度和公差等级,3D 模型通常没有平面度按宽松默认值处理,到货不合格
合金牌号与状态6063-T5、6061-T6、1050 在挤压和加工上表现不同按最便宜合金报价,导热率低于你的假设
表面处理与颜色氧化膜厚等级、黑色或本色、遮蔽、激光打标都带成本后期作为变更追加,按变更价收费
数量与年用量决定工艺路线:CNC、挤压还是压铸工艺选错,价格要么错要么毫无竞争力
关键公差指明哪些特征需要额外关注与检验按常规件报价,一个关键尺寸后来推高成本与废品
环境与散热方式自然对流、强制风冷、液冷冷板或灌封,影响几何与表面处理按错误工况提几何方案,热性能不达标
贸易术语与目的地FOB、CIF、DDP 在运费、关税、清关上差异大不同基准的报价被放在一起比,最便宜的那个其实不便宜

一份合格的散热器图纸长什么样

合格图纸有四个特征:第一,关键面(尤其底面)有明确的平面度标注,而不是靠默认公差;第二,齿厚与齿距有公差带,因为这两项直接决定模具与挤压稳定性;第三,孔位以基准体系标注,而不是链式累积标注;第四,表面处理在标题栏里写明标准号与膜厚,而不是只写「阳极氧化」。

反过来说,图纸上如果只有外形尺寸而没有任何形位公差,供应商只能按行业惯例报,最后扯皮的概率很高。

要不要给热性能目标

要给,但要给对。比起写「散热要好」,更有用的写法是三个数:功耗多少瓦、允许的环温上限、允许的芯片结温上限。这三项决定了所需热阻,供应商才能判断你的几何是否可行。

如果方案还在早期、没有确定目标,直接说明这一点。供应商可以按经验给出建议几何,但你要明白此时的报价基于假设,不是基于验证过的设计。

合理的响应时间

询价类型合理响应
现货标准型材,本色处理24 小时
板材新加工 CNC 散热器1-3 个工作日
新开挤压型材2-4 个工作日,含 DFM 建议
带模具的压铸散热器3-6 个工作日,含模具方案
含热管或冷板的组件4-7 个工作日

如果对方在 24 小时内就给出一个精确到小数点后两位的价格,而图纸复杂度不低,反而要警惕——多半是没细看就套了模板。

不同基准的报价怎么比

最稳妥的做法是:把所有报价统一换算到同一个贸易术语(建议 FOB),再单独拆出模具费、运费和税费。同时要求供应商在报价单里分开列明材料、加工、表面处理、模具、包装五项。五项拆开之后,谁贵谁不贵一目了然,也方便你判断哪一项有谈判空间。

常见问题

没有 3D 模型,只有 PDF 图纸可以吗?

可以报价,但曲面和复杂特征容易理解偏差,且后续编程阶段可能追加费用。建议至少提供 PDF 加关键尺寸标注,能提供 STEP 最好。

数量还没定,怎么询价?

按区间报。直接给三个数量档(例如 500 / 2,000 / 10,000),供应商会给出阶梯价,你能立刻看到工艺切换点在哪里。

能不能只寄样品让供应商照着做?

可以,但要接受两个后果:一是报价周期变长,因为供应商要先测绘;二是尺寸理解以他们的测绘为准,出现偏差责任难划分。建议同时提供样品和关键尺寸表。

报价里含不含运费?

默认不含,除非你指定 DDP。看到特别低的报价先确认贸易术语,很多「低价」是 EXW,运费和清关全在你这边。

准备一份 STEP 加一张标好关键公差的图纸发给我们,我们会在一到三个工作日内返回拆分成本项的报价。



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