Methods And Steps for Detecting The Runout Value

The common methods and steps for detecting the runout value of mechanical flat circular cutters are as follows, which are mainly achieved through tools such as dial indicators (micrometers) or laser vibrometers. Take the dial indicator detection as an example:

1. Prepare tools and equipment

• Dial indicator (or micrometer): The accuracy is selected according to the needs (such as 0.01mm or 0.001mm level).

• Magnetic base: Fix the dial indicator to ensure the stability of the gauge head.

• Spindle or rotary tooling: used to install the tool and drive it to rotate.

2. Detect radial runout (swing of the blade along the radius)

1. Install the tool and gauge head:

◦ Fix the flat circular cutter on the spindle or rotary tooling to ensure that it is firmly installed (avoid affecting the detection results due to loose clamping).

◦ Use a magnetic base to fix the dial indicator on the machine tool bed or stable bracket so that the gauge head is vertically against the outer cylindrical surface of the blade (the contact point is as close to the edge of the blade as possible).

2. Rotate the tool and read the reading:

◦ Start the spindle manually or at a low speed, and let the tool rotate slowly for one circle.

◦ Observe the maximum swing range of the dial indicator pointer. The difference between the maximum and minimum values of the pointer fluctuation is the radial runout value.

III. Detect axial runout (movement of the tool along the axis)

1. Adjust the position of the dial indicator head:

◦ Change the dial indicator head to vertically press against the end face of the tool (close to the outer circle).

2. Rotate the tool and read the reading:

◦ Similarly, slowly rotate the tool for one circle. The maximum fluctuation difference of the dial indicator pointer is the axial runout value.

IV. Precautions

• Environment and equipment status: Ensure that the equipment is free of vibration and the spindle speed is uniform during the inspection (high-speed rotation may cause errors).

• Multiple measurements: Repeat the inspection 2-3 times and take the average value to reduce the error.

• Accuracy requirements: If higher accuracy (such as micron level) is required, a laser vibrometer can be used to directly measure the displacement change of the tool surface through laser beam reflection, and the data is more accurate.

• Tool status: Check whether the blade is worn or chipped before testing to avoid abnormal runout values due to defects in the tool itself.

V. Result judgment and adjustment

• If the runout value exceeds the use standard (such as the requirements of different fields mentioned above), check:

◦ Whether the tool is installed eccentrically (re-clamp);

◦ Whether the spindle or tool holder is worn (replace parts);

◦ Whether the tool is deformed or damaged (grind and repair or replace with a new tool).

The above steps can quickly detect the runout value of the flat circular tool to ensure that the processing accuracy meets the requirements.