详细计算方法： Detailed calculation method: 1）首先你可以对关键或复杂零件要求对方提供初步的工艺安排，详细到每个工序，每个工序的耗时。 1) firstly, you can request the other party to provide a preliminary process arrangement for the key or complex parts, detailed to each process, and the time of each process. 2）根据每个工序需要的设备每小时费用可以算出加工成本。具体设备成本你也可以问供应商要，比如说：普通立加每小时在￥60~80之间（含税）；铣床、普车等普通设备一般为￥30。 2) the processing cost can be calculated according to the cost per hour required by each process. You can also ask the supplier for the cost of the specific equipment, such as: ordinary li + per hour between RMB 60 ~ 80 (tax included); Ordinary equipment such as milling machines and pups generally is RMB 30. 3）在按照比例加上包装运输、管理费用、工装刀具、利润就是价格了。当然，价格一定程度上会和该零件的年采购量和难易程度有很大关系。单件和批量会差很多价格，这也是很容易理解的。 3) in terms of proportion, packing and transportation, management expenses, tooling and profit are the prices. Of course, the price will have a lot to do with the amount of annual purchase and the degree of difficulty. It's also easy to understand that single pieces and batch prices can be a lot cheaper. 粗略估算法： Rough estimation method: 1）对于大件，体积较大，重量较重。 1) large, bulky, heavy weight. 难度一般的： 加工费用大概与整个零件原材料成本之比为1：1，这个比与采购量成反比。 The difficulty is general: processing cost is approximately 1 to the ratio of raw material cost of whole parts, this ratio is inversely proportional to purchase quantity. 难度较大的： 加工费用大概与整个零件原材料成本之比为1.2~1.5：1，这个比与采购量成反比； The cost of processing is approximately 1.2 ~ 1.5:1, which is inversely proportional to the purchase quantity; 2）对于中小件 2) for small and medium sized pieces 难度一般的： 加工费用大概与整个零件原材料成本之比为2~3：1，这个比与采购量成反比。 The difficulty is general: the ratio of processing cost to the raw material cost of the whole part is 2 ~ 3:1, which is inversely proportional to the purchase quantity. 难度较大的： 加工费用大概与整个零件原材料成本之比为5~10：1，这个比与采购量成反比。 The difficulty is greater: the ratio of processing cost to the raw material cost of the whole part is 5 ~ 10:1, which is inversely proportional to the purchase quantity. 由于机械加工存在很大的工艺灵活性，也就是一个零件可以有很多种工艺安排，那么成本当然是不一样的，但是供应商有时会报价时给你说一种复杂工艺提高价格，而实际生产时会采用其他简单工艺，所以采购员自身对图纸的阅读和对零件加工方面的知识的多少就决定你对成本的把握，所以机械零件采购需要比较全面的机械加工知识。 Due to mechanical processing there is a big process flexibility, there are many kinds of craft is a parts can arrange, so the cost is not the same, of course, but the supplier sometimes when quotation give you said a complex process to raise prices, will use other simple and practical production process, so the buyer itself to the reading and drawing of parts processing knowledge of how much is your grasp of the cost decision, so the mechanical parts procurement needs comprehensive knowledge of mechanical processing.