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Numerical control lathe machining unit price calculation
From:Taian Haishu Machinery Co.,Ltd. Updatetime:2016-1-15 9:23:35 Views：
Mechanical processing offer problem is a more complicated problem, main factors are the following: the first is batch processing problem, piece and a large amount of the price may vary considerably. The second is the complexity of the workp
Mechanical processing offer problem is a more complicated problem, main factors are the following: the first is batch processing problem, piece and a large amount of the price may vary considerably.The second is the complexity of the workpiece, tolerance, especially the shape and position tolerances, precision grade, the quotation for parts influence is very big also.The third is the local hour rate, also has a lot to do;There is material, is the degree of free cutting, all these factors affect price, so the quote is a comprehensive problem.Sometimes the batch big also calculates the price of processing waste problem, if is non-ferrous metal, that waste must tell in advance, that's no small income. 
Assume that your outer diameter is 18 mm, a M16 screws, is 20 mm in length, materials processing, materials for the stainless steel
You need a knife, car diameter first assumed rotating speed is 120 RPM, feeding 0.1 mm, then we can work out the time one knife is 24 members present (120 x 0.1) for about 2 min (24 20 + tail back width = workpiece and cutter width); 
The second step is car screw, M16 thread pitch is 2 mm, then 20 long is 10 laps, add back the tail width of at least 12 laps, according to the 60 RPM is 0.2 minutes, 0.2 minutes per knife back half is 0.1 minutes, add up to the car screw each knife is 0.3 minutes, the thick thread car four knife fine count one knife is 0.3 * 5 = 1.5 minutes. 
The third step work is cut off, turn per 0.1 feeding, 100 RPM, is 16 members present (100 x 0.1) = 1.6 minutes
Over time a total of 2 + 1.5 + 1.6 = 5.1 minutes
If is single, plus auxiliary time 30 minutes = 35.1 minutes
Bulk is according to the batch size appropriate with a bit of time, such as 500 pieces can give to 6 minutes. 
Down is the hour rate, by nc 30 yuan/hour
Single 35.1 x (30 members present 60) = 17.55 yuan/piece
Batch 500:6 x (30 members present 60) = 3 yuan/piece
Material processing + hours) * 1.3 * 1.08 = RMB/piece
Processing time to convert to money. We here is so calculate. Every place is different
1.3 is 30% of the profits. 1.08 is the tax of 8%
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