Analysis of Cost Composition of Sheet Metal Parts

1. Material cost

2. Standard component cost

3. Process processing fee

4. Packaging fee

5. Transportation cost

6. Management expenses

7. Profit

1、 Material cost

Material cost refers to the net material cost as required by the drawings=material volume * material density * material unit price

2、 Standard component cost

Refers to the cost of standard components required by the drawings.

3、 Process processing fee

Refers to the processing cost required for each process required to produce a product. List the main process cost components for explanation

1. CNC material cutting

Its cost composition=equipment depreciation and amortization+labor costs+auxiliary materials

Equipment depreciation and amortization:

Equipment depreciation is calculated over 5 years, with 12 months per year, 22 days per month, and 8 hours per day.

For example, for a device worth 2 million yuan, the depreciation rate per hour is 200 * 10000/5/12/22/8=189.4 yuan/hour

Labor cost:

Each CNC requires 3 technicians to operate, with an average monthly salary of 1800 yuan per technician. They work 22 days a month for 8 hours a day, resulting in an hourly cost of 1800 * 3/22/8=31 yuan/hour

Auxiliary material cost:

Refers to the auxiliary production materials such as lubricants and volatile liquids required for equipment operation. Each equipment requires approximately 1000 yuan per month. Calculated based on 22 days per month and 8 hours per day, the hourly cost is 1000/22/8=5.68 yuan/hour

2. Bending

Its cost composition=equipment depreciation and amortization+labor costs+auxiliary materials

Equipment depreciation and amortization:

Equipment depreciation is calculated over 5 years, with 12 months per year, 22 days per month, and 8 hours per day.

For example, for equipment worth 500000 yuan, the depreciation rate per minute is 50 * 10000/5/12/22/8/60=0.79 yuan/minute

Folding a bend usually takes 10 to 100 seconds, so the depreciation of equipment for each bend is 0.13-1.3 yuan/blade.

Labor cost:

Each device requires one technician to operate, with an average monthly salary of 1800 yuan per technician. They work 22 days a month for 8 hours a day, resulting in a cost per minute of 1800/22/8/60=0.17 yuan/minute. On average, they can bend 1-2 turns per minute. Therefore, the labor cost per turn is 0.08-0.17 yuan/knife

Auxiliary material cost:

The cost of auxiliary materials used for each bending machine per month is 600 yuan. Calculated based on 22 days per month and 8 hours per day, the hourly cost is 600/22/8/60=0.06 yuan/knife

3. Surface treatment

Outsourced according to the purchase price (such as electroplating, oxidation)

Composition of spraying cost:

Spray coating cost=powder material cost+labor cost+auxiliary material cost+equipment depreciation

Powder material cost: The calculation method is generally based on square meters, and the price per kilogram of powder ranges from 25-60 yuan (mainly related to customer requirements). Generally, 4-5 square meters can be sprayed per kilogram of powder.

Powder material cost=6-15 yuan/square meter

Labor cost: There are a total of 15 people on the spraying line, with each person charged 1200 yuan per month, 22 days per month, 8 hours per day, and a spraying area of 30 square meters per hour.

Labor cost=15 * 1200/22/8/30=3.4 yuan/square meter

Auxiliary material cost: mainly refers to the fuel cost for pre-treatment liquid and curing furnace, which is 50000 yuan per month. It is charged 22 days a month, 8 hours a day, and 30 square meters per hour.

Auxiliary material cost=9.47 yuan/square meter

Equipment depreciation: The investment in the spraying line is 1 million yuan, depreciated over 5 years, in December each year, 22 days per month, 8 hours per day, spraying 30 square meters per hour.

Equipment depreciation cost=100 * 10000/5/12/22/8/30=3.16 yuan/square meter

The total spraying cost is 22-32 yuan/square meter

If partial protection spraying is required, the cost will be higher.

4、 Packaging fee

According to different products, packaging requirements and prices vary, generally ranging from 20-30 yuan/cubic meter

5、 Transportation management fee

The transportation cost is allocated to the product.

6、 Management expenses

There are two parts to management expenses: factory rent, utilities, and financial expenses

Factory rental of water and electricity:

The monthly cost of renting water and electricity from the factory is 150000 yuan, and the monthly output value is calculated at 4 million yuan. The proportion of renting water and electricity from the factory to the output value is 1.75% (15/400)

Financial expenses:

Due to a mismatch in accounts receivable and payable cycles (we purchase materials in cash and customers settle accounts every 60 days), we need to hold down funds for at least 3 months, with bank interest rates ranging from 1.25-1.5%

Therefore, management expenses should account for about 5% of the total sales price.

7、 Profit

Considering the long-term development of the company and better customer service, our profit margin is 10% -15%