Machining Time for Horizontal and Vertical Spindle Surface-Grinder Calculator

Machining Time Formula:

\[ t_m = \frac{d_{cut}}{2 \times f \times n_r} + t_s \]

Depth of Cut:

Feed Rate:

m/rev

Frequency of Reciprocating Strokes:

Spark Out Time:

Machining Time: s

1. What is Machining Time for Surface Grinding?

Definition: This calculator estimates the time required for surface grinding operations using horizontal or vertical spindle surface grinders.

Purpose: It helps machinists and manufacturing engineers determine the processing time for surface grinding operations.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ t_m = \frac{d_{cut}}{2 \times f \times n_r} + t_s \]

Where:

\( t_m \) — Machining time (seconds)
\( d_{cut} \) — Depth of cut (meters)
\( f \) — Feed rate (meters/revolution)
\( n_r \) — Frequency of reciprocating strokes (Hz)
\( t_s \) — Spark out time (seconds)

Explanation: The formula calculates the basic grinding time based on depth and feed rate, then adds the spark out time for finishing.

3. Importance of Machining Time Calculation

Details: Accurate machining time estimation helps in production planning, cost estimation, and machine scheduling.

4. Using the Calculator

Tips: Enter depth of cut, feed rate (default 0.0007 m/rev), stroke frequency (default 1.2 Hz), and spark out time (default 7 s). All values must be ≥ 0.

5. Frequently Asked Questions (FAQ)

Q1: What is spark out time?
A: Additional time where the wheel passes over the workpiece without increasing cut depth to ensure surface finish.

Q2: How does stroke frequency affect machining time?
A: Higher frequency reduces machining time as more cutting strokes occur per unit time.

Q3: What's a typical feed rate for surface grinding?
A: Usually between 0.0005-0.001 m/rev depending on material and wheel type.

Q4: Why is there a factor of 2 in the formula?
A: Accounts for the reciprocating motion (cutting in both directions).

Q5: Does this include setup and loading time?
A: No, this calculates only the actual grinding time. Add setup time separately.