A complete collection of calculation methods for machining quotation

Let's discuss the approximate calculation method of machining quotation. The material cost is a certain main difference, which lies in the different labor costs, transportation costs, consumption costs and taxes of each company. So how are these parts calculated by machining factories? The following small series collates some information for reference. (The calculation method varies from place to place due to price differences)

Detailed calculation method:

1) First, you can ask the other party to provide a preliminary process arrangement for key or complex parts, which is detailed 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,

the average hourly cost of ordinary equipment such as milling machines and general cars is between 6 and 8 yuan (including tax), which is generally 3 yuan. . .

3) If you add packaging and transportation, management expenses, tooling and tools, and profit in proportion, it will be the price.

Of course, the price will have a great relationship with the annual purchase volume and difficulty of this part to a certain extent.

it is 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 larger and the weight is heavier.

the difficulty is average: the ratio of the processing cost to the raw material cost of the whole part is about 1: 1, which is inversely proportional to the purchase quantity;

it is more difficult: the ratio of processing cost to raw material cost of the whole part is 1.2 ~ 1.5: 1, which is inversely proportional to the purchase volume;

2) For small and medium-sized parts

, the difficulty is average: 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 amount;

it is more difficult: the ratio of the processing cost to the raw material cost of the whole part is about 5 ~ 1: 1, which is inversely proportional to the purchase volume;

Because there is great process flexibility in machining, that is, a part can have many kinds of process arrangements, the cost is of course different.

However, suppliers sometimes tell you a complex process to raise the price when quoting, while other simple processes will be used in actual production, so the buyer's own

reading of drawings and knowledge of parts processing will determine your grasp of the cost, so the procurement of mechanical parts requires more comprehensive knowledge of machining.

the composition of machining expenses is generally given according to working hours!

if you want to process a workpiece, the first thing is the material cost of the other party; Then there are some travel expenses for purchasing the workpiece (generally not);

The most important thing is the processing man-hours of the workpiece you want to process, which is generally 1-2 yuan/hour for turners and 1-15/ hour for locksmiths. The rest are not enumerated;

If you don't have ready-made tools (such as knives and molds), you will have to bear part or all of the purchased expenses. Finally, it adds up to the processing fee you have to pay!

Material cost, machine depreciation, labor cost, management fee, tax and so on are essential. Or it is the cost of materials, processing and taxes, as well as business expenses and transportation expenses. Budgeting requires a thorough understanding of many markets. If you don't spend a few years in it, you won't be able to get a clue at all. Even my teachers often feel sad! It's no good to leave your heart at all!

the problem of technology should include material cost, processing cost (the processing price is different), equipment depreciation cost, workers' salary, management fee, tax, etc. It is mainly to determine the process, that is, the processing method, and then calculate the working hours according to the process, and determine the basic processing cost of a single part by working hours, plus other expenses. Technology is a very complicated knowledge. A part uses different technologies, and the price is different. In fact, the basic price of working hours for each type of work is not fixed. It will vary according to the difficulty of the workpiece, the size and performance of the equipment. Of course, the key depends on your quantity, but generally speaking, it has a basic price, which fluctuates between the basic prices.

1. Basic price of the car: 2-4. Sometimes even only 1 yuan, such as some large pulleys, has a large machining allowance, and the boss only earns enough money from cast iron powder; Sometimes, if the workpiece is large, it can be higher than that which can't be machined in the market, and others can't help it. 2. Basic grinding price: 25-45

3. Basic milling price: 25-45. 4. Basic drilling price: 15-35

5. Basic planing price: 15-35

6. Generally, the price of a single piece is 5/ piece (less than 1 hour)

8. The basic price of NC is 2-4 times more expensive than the ordinary one. 9. Sculpture: generally, it is a single piece. 5-5/ piece is of course a word. The specific price of the specific product is for reference only. If you have any experience, I hope you can speak out and communicate together.

serial number, equipment name, model number, processing range, processing cost (RMB/ )

1 lathe c616 φ 32× 75 ~ 1 11

2 lathe c614 φ 4× 1 ~ 2 13

3 lathe J1-mazak φ 46× 1 ~ 2 15

4 lathe c615 φ 46× 1. ~2 21

6 lathe C65φ 8× 15 ~ 53

7 vertical lathe C5116a φ 1628

8 radial drilling machine Z35φ 5 ~ φ 63169 radial drilling machine Z38 Φ8 2

1 vertical drilling machine Z514a φ 32 ~ φ. T68 1×1 26

12 horizontal boring machine T611 1×1 3

13 vertical boring machine T4163 63×1156

14 horizontal boring machine T6111A 12×12 36

15 universal cylindrical grinder M142 φ 122. Universal cylindrical grinder M1432A M925×5~1 19

17 universal cylindrical grinder m1432b φ 315 ~ 32× 15 ~ 3 26

18 universal cylindrical grinder m1331a φ 315 ~ 32× 15 ~ 3 26

. 8

2 precision universal external grinder Mg 1432 φ 32× 1 ~ 2 3221 internal grinder Mg 1432 φ 12 ~ φ 1× 1313

22 surface grinder M712 2×63~65 16 23 surface grinder M713 3× 1 21

. 2 4

25 guideway grinder M51 1×6 28

26 spline grinder m8612a φ 12× 18 28

27 thread grinder y752w φ 2× 5 2

28 gear grinder y4632a φ 32× 6m3

. 13

3 universal tool grinder MW62 Φ2×5 13

31 p > 31 universal tool grinder M925Φ2×65 16

32 p > 32 universal tool grinder M625H Φ25×65 16

33 p > 33 universal tool grinder M6425Φ25×65 16

34 p >. ×15~17 16

35 gear hobbing machine ym315e φ 5× 8m22

36-bar rack ym515b φ 5× 8m18

37 vertical milling machine x53a φ 3× 112 1638 vertical milling machine X52K Φ32×125 18

39 ×125 18

4 horizontal milling machine X63W φ 4× 16 24

41 ram milling machine XS5646/ 1 φ 425× 2 28

42 shaper B665 65×8 14

43 shaper B65 65×8 11

44 hydraulic shaper B69 9 ~ 1 16

45 hydraulic shaper B69 9 ~ 1 16. ~128

47 planer B22A 2~6 5

48 rod bed B532 2~32 12

49 broaching machine L614 4T 15

5 marking fitter φ 2× 65 15

51 assembling fitter φ 2.

53 machining center φ 2× 65 8

54 wire cutting φ 2× 659 55

55 welding tool φ 2× 65 7

Due to different regions, different time, different manufacturers, different demanders, different suppliers and different quantities, there are many differences, and the prices are also very different. However, it is generally charged according to the working hours, and a reference is given as follows (the figures are only for reference, and the difference between regions and time is really great): This data does not include electric machining, such as wire cutting, which is generally charged according to the area to be machined.

1. Pricing by working hours: Z25 drilling machine, CA614 lathe planer, slotting machine and sawing machine are charged at 15 yuan per hour. Vertical and horizontal milling, wire cutting, large lathe and gantry milling are charged at 2 yuan per hour. Fitter generally charges for maintenance at 15 yuan per hour. The timekeeping unit starts from taking over the processing to the end of the acceptance of the processing.

second, according to the parts, quantity, Charging method for accuracy requirements:

1. General materials for drilling

General materials with depth-diameter ratio not more than 2.5 times, with a diameter of 25MM or less, with a bit diameter of *.5, with a diameter of 25-6, with a bit diameter of *.12 (the smallest hole is not lower than .5 yuan), with a depth-diameter ratio of more than 2.5, are charged at the base price * depth-diameter ratio *. .4 If the aperture accuracy is less than .1MM or the center distance is less than .1MM, the basic price *5 will be charged, and the tapping fee will be charged according to the tap diameter *.2 (based on cast iron, Steel parts will be charged at the standard base price of *.2-.8 (according to the batch size and processing difficulty)

2. lathe processing for general precision optical axis processing

if the length-diameter ratio is less than 1, it will be charged according to the blank size of the workpiece *.2 (the lowest 5 yuan), and if the length-diameter ratio is greater than 1, it will be charged according to the general optical axis base price * the length-diameter ratio number *. .15 If the accuracy is required to be within .5MM or the taper is required, the general stepped shaft (fan shaft, pump shaft, reducer shaft, grinding wheel shaft, motor shaft, spindle, etc.) will be charged at the general optical axis base price *2. If the stepped shaft has taper and internal and external rib, it will be charged at the general precision optical axis base price *3. The general purpose screw will be charged at the general precision optical axis base price *4. The charging standard for flange parts will be charged. General round nut parts are charged according to the diameter of *.25 (including materials), generally trapezoidal, triangular nut parts are charged according to the diameter of *.3 (excluding materials), generally shaft sleeve parts (diameter less than 1 and diameter-length ratio less than 2) are charged according to the material outer diameter of *.2, and the diameter-length ratio of more than 2 is * base price *.6. Generally, each 5 yuan of bearing platform parts with wear less than 2MM, diameter less than 4MM and width less than 25MM is repaired. If the diameter is greater than 4MM, it will be charged according to the diameter of *.2.

3. For general keyway processing of milling machine

(with aspect ratio less than 1), the width of key slot *.5 is charged (minimum 5 yuan). If the aspect ratio exceeds 1, it will be charged according to the aspect ratio * base price *.1. If there is a strict position requirement, it will be charged according to the base price *2. Materials with hardness greater than HRC4 are processed at the base price of *2. General spline processing (with the aspect ratio less than 5) is charged according to the spline shaft outer diameter *.8 (minimum 15 yuan) and general gear processing is charged according to the modulus * number of teeth *.5 yuan. Worm gear is charged according to cardinal number *1.2. Bevel gears, bevel gears and modified gears are charged at the base price of *2. Generally, plane machining is charged at 1.5 yuan per square decimeter (minimum 5 yuan), and general boring is charged at hole diameter *.25.

4. The general round steel, thick-walled pipe and square steel are cut by band saw, and the general steel plate is cut by 5 yuan per square decimeter (minimum 5 yuan), and divided into strips, and the opening angle is 1 yuan per square decimeter (minimum 1 yuan).

5. General parts for WEDM are charged according to the cutting area (square millimeter) *.8 yuan. 5 yuan will be added for each threading hole of the parts that need threading.

6. Electric welding, gas cutting and plasma cutting are used for each 1 yuan with a common covered electrode diameter of 3.2, and each 3 yuan of the TH56 welded casting. Gas cutting processing: plasma cutting stainless steel is calculated according to the thickness of iron plate MM* cutting length m, and charged according to the basic price of gas cutting *3, and cutting carbon steel is charged according to the basic price of gas cutting *2.

7. With regard to special urgent parts and overtime parts, the definition of receiving special urgent parts according to the standard base price *2 is: arranging to repair or manufacture emergency parts for a specific customer at the first time. Overtime parts refer to parts that must be manufactured continuously after normal working hours. 6 yuan/hour 2 lathe for curve grinding of optical tools, 2 yuan/hour lathe 3 yuan/hour milling machine 2 yuan/hour drilling 15 yuan/hour boring machine 35 yuan/hour milling machine 3 yuan/hour slotting machine 15 yuan/hour shaper 2~25 yuan/hour planer, milling 3 yuan/hour roller (the thickness of rolled steel plate is below 2) 6 yuan/hour C62.C614 Basic 2 yuan/hour 3 yuan lathe 3 yuan/hour turning.