CNC machining quotations include material costs, machine depreciation costs, labor costs, management fees, taxes, etc. are basically required.
1 First of all, you can ask the other party to provide the pre-process arrangement of key or complex parts, detailing each process and the time consumption of each process
2 The machining cost can be calculated according to the hourly cost of the equipment required for each process. You can also ask your supplier for specific equipment costs, for example,
Ordinary cnc 60~80 yuan per hour.
3 Proportional to packaging and transportation, management costs, tooling tools, profit is price
Of course, the price will have a lot to do with the annual procurement volume and difficulty of components to a certain extent.
The price difference between single and bulk is easy to understand.
Rough estimation method:
1 For large items, the volume is larger and the weight is heavier.
General difficulty: The ratio of the machining cost to the raw material cost of the entire part is about 1:1, and the ratio is inversely proportional to the purchase amount;
Difficulty: the ratio of the machining cost to the raw material cost of the entire part is about 1.2~1.5:1, which is inversely proportional to the purchase amount;
2 small and medium items
General difficulty: The ratio of the machining cost of the entire part to the raw material cost is about 2~3:1, and the ratio is inversely proportional to the purchase amount;
More difficult: the ratio of machining cost to the raw material cost of the entire part is about 5-10:1, and this ratio is inversely proportional to the purchase amount;
Because precision machining has great process flexibility, i.e. a part can have multiple process arrangements, the costs are of course different.
However, sometimes the supplier will tell you a complicated process to increase the price when quoting, and other simple processes will be used in the actual production, so the buyer himself
The reading of drawings and the knowledge of parts CNC machining determine your grasp of the cost, so purchasing precision machined parts requires more comprehensive precision machining knowledge.
CNC machining
The composition of CNC machining costs is generally calculated by working hours!
If you want to process a workpiece, the first is the material cost of the other party; then some travel expenses for purchasing the workpiece (generally not);
The most important thing is the CNC machining hours required for the workpiece you want to machine
If there are no off-the-shelf tools (eg knives, molds), you are responsible for some or all of the purchase cost; the final sum is the disposal fee you have to pay!
Material costs, machine depreciation costs, labor costs, management fees, taxes, etc. are basically required. or material costs, CNC machining charges and taxes, as well as business costs, shipping costs and budgets. You need to have a thorough understanding of the market. I haven't done it for a few years, and even my teacher can't figure it out. I always feel emotional! Didn't notice at all!
Process issues should include material costs, CNC machining costs (which CNC machining price is different), equipment depreciation costs, worker wages, management fees, taxes, etc. The main thing is to first determine the process, that is, the CNC machining method, and then calculate the working hours according to the process.
Man-hours determine the basic CNC machining cost of a single part as well as other costs. Crafting is a very complex science. Some of them use different craftsmanship and have different prices. The base price of CNC machining time for each job is actually not fixed. It will depend on the difficulty of the workpiece, the size and performance of the equipment.
Of course, the key depends on your quantity, but generally, it has a base price and fluctuates between base prices.
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