Fundamentals

Application

 
Machine

Refer to your machine manual.

For dressing operations, the machine must be prepared accordingly by the machine manufacturer. The machine manufacturer may provide his own cycles.

The term "dressing" refers to the sharpening or truing up of a grinding tool inside the machine. During dressing, the dresser machines the grinding wheel. Thus, during dressing, the grinding tool is the workpiece.

The dressing operation removes material from the grinding wheel and may cause wear of the dressing tool. The material removal and wear lead to changed parameters that need to be compensated for after dressing.

Description of function

The following dressing cycles are available:

In dressing, the workpiece datum is located on an edge of the grinding wheel. Select the respective edge using Cycle 1030 ACTIVATE WHEEL EDGE.

Identify dressing operations in your NC program with FUNCTION DRESS BEGIN/END. When you activate FUNCTION DRESS BEGIN, the grinding wheel is redefined as the workpiece and the dressing tool as the tool. This might result in the axes moving in the opposite direction. When you terminate the dressing mode with FUNCTION DRESS END, the grinding wheel is redefined as the tool.

Dressing

Structure of an NC program for dressing:

  • Activate milling mode
  • Call grinding wheel
  • Move the tool to be dressed to a position near the dressing tool
  • Activate dressing mode; select the kinematic model if necessary
  • Activate the grinding wheel edge
  • Call dressing tool; no mechanical tool change
  • Call the cycle for dressing the diameter
  • Deactivate dressing mode

Dressing of grinding tools

The table below shows for each dressing cycle which grinding tools can be used with which dressing tools.

Cycle

Grinding tool

Dressing tool

Further information

1010

DRESSING DIAMETER

Cylindrical grinding pin

  • Stationary dresser with radius
  • Stationary dresser (flat)
  • Rotating dresser with radius
  • Rotating dresser (flat)

Conical grinding pin

  • Stationary dresser with radius
  • Stationary dresser (flat)
  • Rotating dresser with radius

1015

PROFILE DRESSING

Cylindrical grinding pin

  • Stationary dresser with radius
  • Stationary dresser (flat)
  • Rotating dresser with radius
  • Rotating dresser (flat)

1016

DRESSING OF CUP WHEEL

Cup wheel

  • Stationary dresser with radius
  • Stationary dresser (flat)
  • Rotating dresser with radius

1017

DRESSING WITH DRESSING ROLL

Cylindrical grinding pin

  • Rotating dresser (flat)

1018

RECESSING WITH DRESSING ROLL

Cylindrical grinding pin

  • Rotating dresser (flat)

Notes

  • Cycle 1010 DRESSING DIAMETER can be used for dressing a diameter. If the grinding tool has corner radii, you cannot use dressing cycle 1010. In this case, dressing would violate the radius shape. To enable dressing a diameter and a corner radius, dressing cycle 1015 PROFILE DRESSING must be used.
  • The control does not support mid-program startup while dressing is active. If you jump to the first NC block after dressing using mid-program startup, the control will move the tool to the last position approached during dressing.
  • If you interrupt a dressing infeed movement, the last infeed will not be considered. If applicable, the dressing tool executes the first infeed or part of it without removing material if the dressing cycle is called again.
  • Not all grinding tools require dressing. Comply with the information provided by your tool manufacturer.
  • Please note that the switchover to dressing mode might have been programmed into the cycle sequence already by the machine manufacturer.
  • Dressing

Example

The table below shows an example of what a program structure using dressing cycles might look like.

0 BEGIN PGM GRIND MM

1 FUNCTION MODE MILL

2 TOOL CALL "GRIND_1" Z S20000

3 L X... Y... Z...

4 FUNCTION DRESS BEGIN

5 CYCL DEF 1030 ACTIVATE WHEEL EDGE

...

6 TOOL CALL "DRESS_1"

7 CYCL DEF 1010 DRESSING DIAMETER

...

8 FUNCTION DRESS END

9 END PGM GRIND MM