Detailed calculation method:
1) First of all, you can ask the other party to provide preliminary process arrangements for key or complex parts, in detail to each process, and the time consumption of each process
2) The processing cost can be calculated according to the hourly cost of equipment required for each process. You can also ask the supplier for the specific equipment cost, for example,
Ordinary vertical heaters are between ￥ 60~80 per hour (tax included). Ordinary equipment such as milling machines and ordinary cars are generally ￥ 30.
3) In proportion, plus the packaging and transportation, management expenses, tooling and knives, profits is the price
Of course, the price will have a lot to do with the annual purchase volume and difficulty of the parts to a certain extent.
It's easy to understand that there will be a lot of price difference between single piece and batch.
Rough estimation method:
1) For large pieces, the volume is large and the weight is heavy.
The difficulty is ordinary: the ratio of processing cost to the raw material cost of the whole part is about 1:1, which is inversely proportional to the purchase volume;
Difficult: the ratio between the processing cost and the raw material cost of the whole part is about 1.2~1.5:1, which is inversely proportional to the purchase volume;
2) For small and medium pieces
The difficulty is ordinary: the ratio of processing cost to the raw material cost of the whole part is about 2~3:1, which is inversely proportional to the purchase volume;
Difficult: the ratio between the processing cost and the raw material cost of the whole part is about 5~10:1, which is inversely proportional to the purchase volume;
Due to the great process flexibility of machining, that is, a part can have many process arrangements, so the cost is certainly different,
But sometimes the supplier will tell you a complex process to increase the price when quoting, while other simple processes will be used in actual production, so the buyer himself
The reading of drawings and the knowledge of parts processing determine your grasp of cost, so the purchase of mechanical parts requires a more comprehensive knowledge of machining.
The composition of machining costs is generally given according to the working hours!
If you want to process a workpiece, the first is the material cost of the other party; Then there are some travel expenses for purchasing workpieces (generally not);
The most important thing is the processing time required for the workpiece you want to process. Generally, the lathe worker is 10-20 yuan / hour, and the fitter is about 10-15 yuan / hour less; The rest are not examples;
If there are no ready-made tools (such as knives and molds), you need to bear part or all of the costs you buy; The final sum is the processing cost you have to pay!
Material costs, machine depreciation, labor costs, management fees, taxes and so on are essential. Or material costs, processing costs and taxes, as well as business costs, transportation costs, and budgeting require a thorough understanding of multiple markets. If you don't get involved in it for a few years, you won't get a clue at all. Even my teacher often regrets! You can't be careless at all!
The problem of technology should include material costs, processing costs (the processing price will be different), equipment depreciation costs, workers' wages, management fees, taxes, etc. It is mainly to determine the process, that is, the processing method, and then calculate the working hours according to the process. The basic processing cost of a single part is determined by the working hours, plus other costs. Process is a very complex knowledge. A part adopts different processes, and the price varies. In fact, the basic price of processing hours of various types of work is not fixed. The price of working hours of various types of work will vary according to the difficulty of the workpiece, the size of the equipment, and the performance. Naturally, the key depends on your quantity, but generally speaking, it has a basic price, which fluctuates between the basic prices
