How to Determine the Machining Price for CNC Lathes
As a professional CNC lathe machining specialist, in addition to having a solid understanding of CNC lathe machining processes, you must also be thoroughly familiar with CNC lathe machining pricing. Providing accurate and reasonable quotes not only enables cooperating customers to place orders quickly but also ensures that your company makes a profit and generates revenue. Today, Wofu will provide you with a detailed introduction to the methods used for determining CNC lathe machining prices.
As a professional CNC lathe machining For business personnel, in addition to having a certain understanding of CNC lathe machining processes, it’s also essential to be thoroughly familiar with CNC lathe machining pricing. Providing accurate and reasonable quotes not only enables cooperating customers to place orders quickly but also ensures that the company can make a profit and generate revenue. Today, Wofu will provide you with a detailed introduction to the methods used for determining CNC lathe machining prices.
Detailed calculation method for CNC lathe machining prices:
1. First, it is essential to understand the drawings of the customer’s critical or complex parts, and then confirm with the technical team the detailed CNC lathe machining process, obtaining the time required for each machining operation.
2. The processing cost can be calculated by determining the hourly cost of each piece of equipment required for every CNC lathe machining operation.
3. The final CNC lathe machining price is obtained by adding, proportionally, packaging and transportation costs, management fees, tooling and fixtures, and profit.
Rough estimation method for CNC lathe machining costs:
1) For large items, the volume is relatively large and the weight is relatively heavy.
Of moderate difficulty: CNC lathe machining The cost is roughly in a 1:1 ratio with the raw material cost of the entire part, and this ratio is inversely proportional to the purchase quantity.
For more challenging tasks: The machining cost for CNC lathes typically ranges from 1.2 to 1.5 times the cost of the raw materials for the entire part; this ratio is inversely proportional to the purchase quantity.
2) For small and medium-sized items.
Moderate difficulty: The machining cost for CNC lathes is roughly in a ratio of 2 to 3 to the raw material cost of the entire part; this ratio is inversely proportional to the purchase quantity.
For more challenging parts, the machining cost of CNC lathes typically ranges from 5 to 10 times the cost of the raw materials for the entire part. This ratio is inversely proportional to the purchase quantity.
Fee schedule for CNC lathe machining parts based on quantity and precision requirements:
1. For CNC lathe drilling operations on common materials:
- For materials with a depth-to-diameter ratio no greater than 2.5 and a hole diameter of 25 mm or less, the charge is calculated as the drill diameter multiplied by 0.05.
- For materials with a hole diameter between 25 mm and 60 mm, the charge is the drill diameter multiplied by 0.12 (with a minimum hole diameter of 0.5 mm).
- For materials with a depth-to-diameter ratio greater than 2.5, the base charge is multiplied by the depth-to-diameter ratio and then further multiplied by 0.4.
- For applications requiring hole diameter accuracy better than 0.1 mm or center distance accuracy better than 0.1 mm, the charge is 5 times the base rate.
- For tapping operations, the charge is calculated as the tap diameter multiplied by 0.2 (using cast iron as the standard; for steel parts, an additional multiplier of 1.2 applies).
- In batch processing, the charge is 20% to 80% of the standard base rate (depending on batch size and processing complexity).
2. CNC lathe machining General-precision optical shaft machining. For parts with a length-to-diameter ratio no greater than 10, the charge is calculated as the blank size multiplied by 0.2 (with a minimum charge of 5 yuan). For parts with a length-to-diameter ratio greater than 10, the charge is calculated as the base price for general optical shafts multiplied by the length-to-diameter ratio and then further multiplied by 0.15. If the precision requirement is within 0.05 mm or if the part requires a taper, the charge will be twice the base price for general optical shafts. General stepped shafts (such as fan shafts, pump shafts, reducer shafts, grinding wheel shafts, motor shafts, spindles, etc.) are machined using a CNC lathe for general-precision optical shafts, and the charge is twice the base price. If a stepped shaft has both tapers and internal/external threads, it will be charged at three times the base price for general optical shafts. General-purpose lead screws are machined using a CNC lathe for general-precision optical shafts, and the charge is four times the base price. For general flange-type parts, the charge is calculated as the material diameter multiplied by 0.07; for parts with a diameter greater than 430 mm, the charge is calculated as the material diameter multiplied by 0.12. General round nut parts are charged at 0.25 times the diameter (including material costs). General trapezoidal and triangular nut parts are charged at 0.3 times the diameter (material costs not included). General bushing-type parts (with diameters less than 100 mm and a length-to-diameter ratio less than 2) are charged at 0.2 times the outer diameter of the material; for parts with a length-to-diameter ratio exceeding 2, the charge is calculated as the length-to-diameter ratio multiplied by the base price and then further multiplied by 0.6. For general bearing seat repair parts, if the wear amount is less than 2 mm, the diameter is less than 40 mm, and the width is less than 25 mm, each part is charged 5 yuan. If centering support is required, or if the part’s length exceeds 1.7 meters, the charge is twice the base price. For parts with diameters greater than 40 mm, the charge is calculated as the diameter multiplied by 0.2.
Summary of industry terms used in CNC lathe machining.
Boring: Rough machining of internal bores. However, this term generally refers to internal bores with relatively small diameters.
Thread cutting, buttonhole making: threading.
Thread cutting and threading: Use a die to cut threads.
Quenching: Quenching.
Muffled fire: tempering.
Shao (shao4): Taper, slope—referring to a workpiece that is larger at one end and smaller at the other.
Park: The CNC lathe machining fails to meet the required geometric accuracy specifications, such as uneven surfaces on plates, non-circular disks, rotational wobble, and poor coaxiality.
Relevant Information
2018-04-21
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