As a professional CNC machining business person, in addition to understanding CNC machining technology, you must also be proficient in the price of CNC machining parts, provide correct and reasonable quotations, and complete delivery for cooperative customers, so as to provide customers with products that have an advantage in the market.
Detailed Calculation Method of CNC Machining Turning Price:
1. First of all, we must understand the customer’s key and complex parts drawings, and then determine the detailed CNC processing method, know the time of each processing sequence.
2. The processing cost can be calculated based on the hourly cost of the equipment required for the CNC machining program.
3. The final CNC machining price is calculated according to the proportion of packaging and transportation, management costs, tools and profits.
According to the fineness of CNC cutting, it is very important to choose font size and pattern size. Choose a Sans-Serif font (no decorations that are difficult to cut), and a font size of at least 20. Soft metals may shrink slightly.
Rough Estimation Method of CNC Machining Turning Price:
1) For large items, the volume is larger and the weight is heavier.
General numerical control machining difficulties: the ratio of the machining cost of the CNC lathe to the cost of the entire part is 1:1, which is inversely proportional to the purchase amount;
The difficulty of CNC machining is high: the ratio of the machining cost of the CNC lathe to the raw material cost of the entire part is about 1.2~1.5:1, which is inversely proportional to the purchase volume.
2) For small and medium items.
Difficulties of general CNC machining: the ratio of CNC lathe processing cost to the cost of the entire part’s raw materials is 2~3:1, this ratio is inversely proportional to the purchase amount;
Numerical control processing is difficult: the ratio of the processing cost of the numerical control lathe to the cost of the raw materials of the entire part is 5-10:1, and this ratio is inversely proportional to the purchase amount;
Calculate the Price According to the Requirements, Quantity and Accuracy of CNC Machined Parts:
1. CNC lathe processing general material drilling processing. The depth is less than 2.5 times and the diameter is less than 25MM. According to the drill diameter of 0.05, the drill diameter is calculated according to the drill diameter of 0.12~25-60 (the smallest hole is greater than 0.5 yuan). The basic price of ordinary materials with a depth-to-diameter ratio greater than 2.5 is charged at 0.4 of the depth-to-diameter ratio, and the hole diameter accuracy is less than 0.1MM or the center distance is less than 0.1MM, and the charge is 5 yuan.
The charging standard for tapping is based on the diameter of the taper hole. 0.2 charge (cast iron is the standard, steel parts charge at 1.2). The standard basic price is 0.2-0.8 (depending on the batch size and processing difficulty)
2. Ordinary precision optical axis CNC machining. If the aspect ratio is less than 10, multiply the size of the workpiece by 0.2 and power up (minimum value is 5 yuan). If the aspect ratio is greater than 10, the basic price of the ordinary optical axis is multiplied by the number of aspect ratios multiplied by 0.15, and the accuracy is required to be within 0.05MM or the taper accuracy is charged at the ordinary basic price for the optical axis multiplied by 2.
General stepping shafts (fan shaft, pump shaft, reducer shaft, grinding wheel shaft, motor shaft, spindle, etc.) are processed by a general precision optical axis CNC lathe, and the base price is multiplied by 2. If the stepped shaft has a taper, the inner and outer ribs are processed according to the general precision optical axis, and the reserve price is 3.
Ordinary lead screws are processed by ordinary precision optical axis CNC lathes, and the reserve price is multiplied by 4. The billing standard for ordinary flange parts is the diameter of the material multiplied by 0.07, and the diameter greater than 430MM is. Multiply the material diameter by 0.12.
Usually, the diameter of round nut parts is multiplied by 0.25 (including material) for filling; usually the diameter of trapezoidal and triangular nut parts is multiplied by 0.3 (not including material) for filling; ordinary bushing parts (diameter less than 100, length The to-diameter ratio is less than 2) The outer diameter of the material is multiplied by 0.2.
If the diameter and length ratio exceeds 2, the price will be charged based on the diameter and length ratio multiplied by the base price multiplied by 0.6. Generally, if the wear of the bearing platform components is less than 2mm, the diameter is less than 40mm and the width is less than 25mm.
Each piece is 5 yuan, plus a central frame, or the base price of 1.7 meters or more multiplied by 2. If the diameter is greater than 40MM, the diameter will be multiplied by 0.2.
Several Conditions that Determine the Price of CNC Machining Turning Parts
1. According to the structure and tolerances of the part drawings, select highly specialized equipment, such as automatic lathes, CNC lathes, turning and milling machines, Citizen Swiss automatic lathes, so that professional machines can produce the highest efficiency.
2. According to the material and structure of the part, for the parts that cannot be completed on the machine at one time, we determine the sequence of the production process, and refer to the part size and program tool path to provide efficiency.
3. Choose different processing techniques to produce CNC macahining turning parts, such as: extrusion, forging, stamping, etc.