Machining Time For Each Product Given Individual Costs Calculator

Formula Used:

\[ Machining Time = \frac{Total Production Cost - (Total Non Productive Cost + Total Tool Changing Cost + Total Cost of Tools Used)}{Cost of a Tool \times Batch Size} \] \[ T = \frac{C_p - (C_{np} + C_t + c)}{C \times B} \]

Total Production Cost (Cₚ):

Total Non Productive Cost (Cₙₚ):

Total Tool Changing Cost (Cₜ):

Total Cost of Tools Used (c):

Cost of a Tool (C):

Batch Size (B):

units

Machining Time (T):

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1. What is Machining Time Calculation?

The machining time calculation determines the time required to complete a specific machining operation on a workpiece, based on various cost components associated with the production process.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ T = \frac{C_p - (C_{np} + C_t + c)}{C \times B} \]

Where:

$ T $ — Machining Time (seconds)
$ C_p $ — Total Production Cost ($)
$ C_{np} $ — Total Non Productive Cost ($)
$ C_t $ — Total Tool Changing Cost ($)
$ c $ — Total Cost of Tools Used ($)
$ C $ — Cost of a Tool ($)
$ B $ — Batch Size (units)

Explanation: This formula calculates machining time by subtracting non-productive costs from total production cost and dividing by the tool cost multiplied by batch size.

3. Importance of Machining Time Calculation

Details: Accurate machining time calculation is crucial for production planning, cost estimation, resource allocation, and optimizing manufacturing efficiency in machining operations.

4. Using the Calculator

Tips: Enter all cost values in dollars, batch size as a whole number. Ensure all values are positive and valid (cost of tool > 0, batch size ≥ 1).

5. Frequently Asked Questions (FAQ)

Q1: What constitutes non-productive costs?
A: Non-productive costs include setup time, material handling, inspection, and other activities that don't directly contribute to material removal.

Q2: How does batch size affect machining time?
A: Larger batch sizes typically reduce per-unit machining time due to economies of scale and reduced setup time per part.

Q3: What factors influence tool changing cost?
A: Tool changing cost includes labor time, machine downtime, and any additional expenses associated with changing tools during production.

Q4: How accurate is this calculation method?
A: This method provides a good estimate but actual times may vary based on specific machine capabilities, operator skill, and material properties.

Q5: Can this formula be used for different machining processes?
A: While the basic principle applies, specific coefficients and factors may need adjustment for different machining processes like milling, turning, or drilling.