What is the model code for diamond grinding wheels

When we use diamond(CBN) grinding wheels in our daily lives, we often encounter codes such as 1A1, 3V1, 12V9, and 6A2 to represent the shape and model of the grinding wheel. So some people may ask what these codes mean, how to understand and interpret them? Today we will deconstruct the geometric shapes and semantics of diamond grinding wheel models to facilitate everyone's memory and understanding. Thank you all for your support.
Huice Company produces and researches various diamond CBN grinding wheels with stable performance and high cost-effectiveness

1 Geometric coding rules

ISO 525 considers the profile of a grinding wheel as a parameterized description of the generatrix of a rotating body. The model consists of two letters and one digit:

Initial: Main bus topology

• A is a straight line parallel to the axis,
• V is a straight line at an angle to the axis,
• F is a circular arc,
• and R is a reverse circular arc.
• Secondary letters: Additional features

 

• 1 represents no step,
• 2 represents single-sided step,
• and 9 represents with chamfer.
• Last digit: Minor geometric details such as chamfer angle or transition radius

 

2 Mechanical boundary of 1A1

Example:
1A1=>Parallel straight line busbar, without steps on both sides
11V9=>Single cone busbar, bowl shaped, with an inner chamfer of 45 °

The mother equation for 1A1 sand in the column system r-0-z is z=0, with respect to the half width of the contact zone
Where F. is the normal force, R, Sand radius, E * equivalent modulus of elasticity. Low peak temperature of the large B band
a
Therefore, it is suitable for processes with large contact areas such as slotting hard alloy bars and grinding blade end faces.

 

3 1V1 angle locking

The 1V1 bus equation z=rcota satisfies the cone angle α and the tool rake angle β
α=β+δ
(≈ 2 ° compensating elastic retreat)

The contact half width decreases linearly with r:
b(r) bo

The local temperature rise is inversely proportional to r, so 1V1 can achieve high specific energy grinding at the root of the tooth gap without burning the cutting edge.
 

4 Complementary space of  11V9, 12V9, and 6V5

The busbar inflection point of 11V9 experiences a sudden change in secondary slope, allowing for continued root cleaning after a gear backlash angle of 7 °

Among them, k2=k1-tan45 °.

·Move the inflection point outward with 12V9, so that the end tooth back angle and the circumferential tooth back angle can be completed on the same grinding wheel.
·The 6V5 busbar is a circular arc z=R - √ R2-r2, which meets the requirement of continuous curvature of the back angle of the ball end cutter.

 

5 Engineering positioning of 14A1, 1F1, 4A2, 9A3

14A1 thickness H25mm, metal bond, for deep cutting and slow feed:

ae ≤ 0.3Ds, vw ≤ 300 mm/min

1F1 arc generatrix z = Rf-√R-(r-ro)², used for ball head fine grinding, arc error f2 ε = 8Rf

4A2 cup-shaped grinding wheel end face generatrix z=0, used for blade parallelism trimming, end face runout ≤2μm.

9A3 Double beveled cone angle symmetry, x1 = x2 = 60°, used for V-grooves in optical glass, one-step molding.

 

6. Micro-diameter tooling case map

For 0.1 mm micro drill bits:

Slotting: 1A1 D46, ae = 5 µm, vc = 80 m/s;

Relief angle: 1V1 a = 20°, D = 20mm, internal coolant P = 7 MPa;

Backhoe cleaning: 11V9 α = 45°, feed f = 0.5 µm/rev.

Temperature rise control equation

Tmax =

√ πκρούς

Where q = uapvw is the linear heat source intensity and ap is the grinding depth.

 

7. Non-standard extensions

When the standard busbar cannot meet the requirements, a parameterized quadratic curve can be introduced.

z = ar² + br + c

The grinding wheel envelope is generated by five-axis linkage to generate any contour. At this time, the grinding wheel model is recorded as 1X1, X represents the user-defined generatrix, and the z(r) function must be given in the technical drawing.

 

 

There is a lot of knowledge about the models and codes of diamond (CBN) grinding wheels. In my personal summary,

• A is a flat grinding wheel,
• V is an angular grinding wheel, usually used for grooving,
• R is a grinding wheel for grinding arcs.
• E is a sharp-angled grinding wheel.
• When there are two letters, the working layer may have two faces.

These are my personal learning and exploration, which may not be very scientific, for your reference only.
For more information about the models of diamond (CBN) grinding wheels, please pay attention to China Diamond Tools Network-www.chinadiatools.com. You can also learn by searching for the models and codes of diamond (CBN) grinding wheels.
What does 6A2 in the grinding wheel mean, and what is 1V1?What are the models and codes of diamond (CBN) grinding wheels?